Patent · US10227010B2 · B2 · US

Power management in electric vehicles

(11) Publication number

US10227010B2

(21) Application number

15/440,229

(22) Filing date

2017-02-23

(30) Priority date

2015-03-16

(43) Publication date

2019-03-12

(45) Date of grant

2019-03-12

(51) IPC

B60L 3/00; B60L 3/12

(52) CPC

B60L Propulsion of electrically-propelled vehicles; supplying electric power for auxiliary equipment of electrically-propelled vehicles; electrodynamic brake systems for vehicles in general; magnetic suspension or levitation for vehicles; monitoring operating variables of electrically-propelled vehicles; electric safety devices for electrically-propelled vehicles: 53/00, 1/02, 11/1838, 3/0046, 3/12, 53/10, 53/12, 53/60, 53/66, 53/665, 58/12, 58/13, 58/21, 58/26
B29C Shaping or joining of plastics; shaping of material in a plastic state, not otherwise provided for; after-treatment of the shaped products, e.g. repairing: 65/002
B32B Layered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form: 3/266, 7/04
B60H Arrangements of heating, cooling, ventilating or other air-treating devices specially adapted for passenger or goods spaces of vehicles: 1/00021, 1/00278, 1/00321, 1/00328, 1/00392, 1/00564, 1/00571, 1/143, 2001/00092, 2001/003
B60K Arrangement or mounting of propulsion units or of transmissions in vehicles; arrangement or mounting of plural diverse prime-movers in vehicles; auxiliary drives for vehicles; instrumentation or dashboards for vehicles; arrangements in connection with cooling, air intake, gas exhaust or fuel supply of propulsion units in vehicles: 11/04, 11/085
B60R Vehicles, vehicle fittings, or vehicle parts, not otherwise provided for: 2300/8006
C09J Adhesives; non-mechanical aspects of adhesive processes in general; adhesive processes not provided for elsewhere; use of materials as adhesives: 5/00
F16B Devices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges; joints or jointing: 11/00
F25B Refrigeration machines, plants or systems; combined heating and refrigeration systems; heat pump systems: 29/00
G06F Electric digital data processing: 3/005, 3/017
G06V Image or video recognition or understanding: 20/59, 40/23
H01M Processes or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy: 10/4207, 10/425, 10/4257, 10/482, 10/486, 10/613, 10/625, 10/6557, 10/6563, 10/663, 2010/4271, 2010/4278, 2220/20
H02J Electric power networks; circuit arrangements or systems for supplying or distributing electric power; systems for storing electric energy: 7/56
Y02E Reduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution: 60/10
Y02T Climate change mitigation technologies related to transportation: 10/70, 10/7072, 90/12, 90/14, 90/16

(73) Assignee

Thunder Power New Energy Vehicle Development Co Ltd

(72) Inventors

Yu-Ting Dai

(54) Title

Power management in electric vehicles

(57) Abstract

Various techniques described herein relate to electric vehicle power management system for managing a plurality of battery modules in a battery pack. Such electric vehicle power management system may include a plurality of battery management systems corresponding to a plurality of battery modules, and an energy management system for managing the plurality of battery management systems. The energy management system and the plurality of battery management systems may adopt master-slave wireless communication, and may use a single wireless frequency channel or a plurality of assigned wireless frequency channels.

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Claims (16)

An electric vehicle power management system used for managing a plurality of battery modules, the electric vehicle power management system comprising: a plurality of battery management systems, each said battery management system comprising a battery management processor, a battery management communication module, and a unique battery management system address, wherein each of the plurality of battery management systems has a battery management system address and is configured to manage one or more battery cells of its corresponding battery module; and an energy management system comprising an energy management processor and an energy management communication module, wherein the energy management system is operatively connected to the battery management systems via a set of wireless frequency channels such that the battery management system is connected to each of the plurality of the battery management systems via a wireless frequency channel that is in the set and that uniquely corresponds to the battery management system, and the energy management system is configured to: set a communication interval time; select a first battery management system from the plurality of battery management systems; transmit a first command to the first battery management systems using the wireless frequency channel corresponding to the first battery management system, the first command carrying an address identifying the first battery management system and requesting data from the first battery management system; after the requested data from the first battery management system having been received or the communication time interval has expired, determine whether a data request has been sent to a second battery management system; and when it is determined that a data request has not been sent to the second battery management system, transmit a second command to the second battery management systems using the wireless frequency channel corresponding to the second battery management system, the second command carrying an address identifying the second battery management system and requesting data from the second battery management system.
The electric vehicle power management system of claim 1, wherein the address identifying the second battery management system is not sequential to the address identifying the first battery management system.
The electric vehicle power management system of claim 2, the energy management system is further configured to determine whether each of the plurality of the battery management systems has been sent a data request, and when it is determined that each of the plurality of the battery management systems has been sent a data request, the energy management system is further configured to set the communication interval time again.
The electric vehicle power management system of claim 1, wherein the energy management system is configured to continuously and sequentially update the address identifying one of the plurality of battery management systems to be selected.
The electric vehicle power management system of claim 1, wherein the energy management system is further configured to: before transmitting the first command, transmit a verification signal to the first selected battery management system; receive a response to the verification signal from the first selected battery management system; and determine whether there is an abnormality associated with the first selected battery management system based on the response received to the verification signal.
The electric vehicle power management system of claim 5, wherein the energy management system is further configured to: upon determining that there is an abnormality associated with the first selected battery management system, perform a fault diagnosis process.
The electric vehicle power management system of claim 1, wherein the energy management system is further configured to: identify a first time corresponding to the termination of communications between the energy management system and the first selected battery management system; and determine a time for the transmission of the second command, based on the identified first time and the communication interval time.
The electric vehicle power management system of claim 1, further comprising: an external data bus connected to the energy management system, the external data bus configured to transmit communication data from the energy management system and to receive communication data for the energy management system, wherein the external data bus is configured for bidirectional communication with at least one of a vehicle control unit, a charging unit, or a user interface.
A method for managing a plurality of battery modules, the method being implemented by an electric vehicle power management system comprising: a plurality of battery management systems, each said battery management system comprising a battery management processor, a battery management communication module, and a unique battery management system address, wherein each of the plurality of battery management systems has a battery management system address and is configured to manage one or more battery cells of its corresponding battery module; and an energy management system comprising an energy management processor and an energy management communication module, wherein the energy management system is operatively connected to the battery management systems via a set of wireless frequency channels such that the battery management system is connected to each of the plurality of the battery management systems via a wireless frequency channel that is in the set and that uniquely corresponds to the battery management system; and wherein the method comprises: setting a communication interval time; selecting a first battery management system from the plurality of battery management systems; transmitting a first command to the first battery management systems using the wireless frequency channel corresponding to the first battery management system, the first command carrying an address identifying the first battery management system and requesting data from the first battery management system; after the requested data from the first battery management system having been received or the communication time interval has expired, determining whether a data request has been sent to a second battery management system; and when it is determined that a data request has not been sent to the second battery management system, transmitting a second command to the second battery management systems using the wireless frequency channel corresponding to the second battery management system, the second command carrying an address identifying the second battery management system and requesting data from the second battery management system.
The method of claim 9, wherein the address identifying the second battery management system is not sequential to the address identifying the first battery management system.
The method of claim 9, further comprising determining whether each of the plurality of the battery management systems has been sent a data request, and when it is determined that each of the plurality of the battery management systems has been sent a data request, the energy management system is further configured to set the communication interval time again.
The method of claim 9, further comprising continuously and sequentially updating the address identifying one of the plurality of battery management systems to be selected.
The method of claim 9, further comprising before transmitting the first command, transmitting a verification signal to the first selected battery management system; receiving a response to the verification signal from the first selected battery management system; and determining whether there is an abnormality associated with the first selected battery management system based on the response received to the verification signal.
The method of claim 9, further comprising: upon determining that there is an abnormality associated with the first selected battery management system, performing a fault diagnosis process.
The method of claim 9, further comprising: identifying a first time corresponding to the termination of communications between the energy management system and the first selected battery management system; and determining a time for the transmission of the second command, based on the identified first time and the communication interval time.
The method of claim 9, wherein the electric vehicle power management system further comprises an external data bus connected to the energy management system, wherein the method further comprises: transmitting communication data from the energy management system and to receive communication data for the energy management system through the external data bus, wherein the external data bus is configured for bidirectional communication with at least one of a vehicle control unit, a charging unit, or a user interface.

Description

The present invention relates to a power management systems for electric batteries, for example, batteries within electric vehicle motors and other electric devices.

Battery charging and power management technologies are an important part of the development of new electric battery-powered devices, such as electric vehicles. For example, a plurality of battery modules may be the power source of an electric vehicle and may play an important role in the operation of the electric vehicle. Effective management and monitoring of the battery may be a critical technology, and thus the battery management system becomes an essential part of the electric vehicle. Battery management systems in electric vehicles may monitor battery voltage, current, temperature, and other battery parameters and conditions necessary to ensure the effective operation of the battery. Such data may be stored and provided to various control circuits and systems within the battery pack and/or within the electric device (e.g., a vehicle control unit of an electric vehicle). In some cases, battery packs may use pluralities of replaceable battery modules, creating complications and difficulties for ongoing monitoring and management of the battery modules.

In view of the above, the present invention relates to power management systems for electric devices, such as electric vehicles.

Certain aspects of the present invention relate to power management system for electric vehicle.

Citations (63)

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US20090139781A1
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Record as JSON

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  "publication_number": "US10227010B2",
  "country": "US",
  "kind": "B2",
  "title": "Power management in electric vehicles",
  "abstract": "Various techniques described herein relate to electric vehicle power management system for managing a plurality of battery modules in a battery pack. Such electric vehicle power management system may include a plurality of battery management systems corresponding to a plurality of battery modules, and an energy management system for managing the plurality of battery management systems. The energy management system and the plurality of battery management systems may adopt master-slave wireless communication, and may use a single wireless frequency channel or a plurality of assigned wireless frequency channels.",
  "claims": [
    "1. An electric vehicle power management system used for managing a plurality of battery modules, the electric vehicle power management system comprising: a plurality of battery management systems, each said battery management system comprising a battery management processor, a battery management communication module, and a unique battery management system address, wherein each of the plurality of battery management systems has a battery management system address and is configured to manage one or more battery cells of its corresponding battery module; and an energy management system comprising an energy management processor and an energy management communication module, wherein the energy management system is operatively connected to the battery management systems via a set of wireless frequency channels such that the battery management system is connected to each of the plurality of the battery management systems via a wireless frequency channel that is in the set and that uniquely corresponds to the battery management system, and the energy management system is configured to: set a communication interval time; select a first battery management system from the plurality of battery management systems; transmit a first command to the first battery management systems using the wireless frequency channel corresponding to the first battery management system, the first command carrying an address identifying the first battery management system and requesting data from the first battery management system; after the requested data from the first battery management system having been received or the communication time interval has expired, determine whether a data request has been sent to a second battery management system; and when it is determined that a data request has not been sent to the second battery management system, transmit a second command to the second battery management systems using the wireless frequency channel corresponding to the second battery management system, the second command carrying an address identifying the second battery management system and requesting data from the second battery management system.",
    "2. The electric vehicle power management system of claim 1, wherein the address identifying the second battery management system is not sequential to the address identifying the first battery management system.",
    "3. The electric vehicle power management system of claim 2, the energy management system is further configured to determine whether each of the plurality of the battery management systems has been sent a data request, and when it is determined that each of the plurality of the battery management systems has been sent a data request, the energy management system is further configured to set the communication interval time again.",
    "4. The electric vehicle power management system of claim 1, wherein the energy management system is configured to continuously and sequentially update the address identifying one of the plurality of battery management systems to be selected.",
    "5. The electric vehicle power management system of claim 1, wherein the energy management system is further configured to: before transmitting the first command, transmit a verification signal to the first selected battery management system; receive a response to the verification signal from the first selected battery management system; and determine whether there is an abnormality associated with the first selected battery management system based on the response received to the verification signal.",
    "6. The electric vehicle power management system of claim 5, wherein the energy management system is further configured to: upon determining that there is an abnormality associated with the first selected battery management system, perform a fault diagnosis process.",
    "7. The electric vehicle power management system of claim 1, wherein the energy management system is further configured to: identify a first time corresponding to the termination of communications between the energy management system and the first selected battery management system; and determine a time for the transmission of the second command, based on the identified first time and the communication interval time.",
    "8. The electric vehicle power management system of claim 1, further comprising: an external data bus connected to the energy management system, the external data bus configured to transmit communication data from the energy management system and to receive communication data for the energy management system, wherein the external data bus is configured for bidirectional communication with at least one of a vehicle control unit, a charging unit, or a user interface.",
    "9. A method for managing a plurality of battery modules, the method being implemented by an electric vehicle power management system comprising: a plurality of battery management systems, each said battery management system comprising a battery management processor, a battery management communication module, and a unique battery management system address, wherein each of the plurality of battery management systems has a battery management system address and is configured to manage one or more battery cells of its corresponding battery module; and an energy management system comprising an energy management processor and an energy management communication module, wherein the energy management system is operatively connected to the battery management systems via a set of wireless frequency channels such that the battery management system is connected to each of the plurality of the battery management systems via a wireless frequency channel that is in the set and that uniquely corresponds to the battery management system; and wherein the method comprises: setting a communication interval time; selecting a first battery management system from the plurality of battery management systems; transmitting a first command to the first battery management systems using the wireless frequency channel corresponding to the first battery management system, the first command carrying an address identifying the first battery management system and requesting data from the first battery management system; after the requested data from the first battery management system having been received or the communication time interval has expired, determining whether a data request has been sent to a second battery management system; and when it is determined that a data request has not been sent to the second battery management system, transmitting a second command to the second battery management systems using the wireless frequency channel corresponding to the second battery management system, the second command carrying an address identifying the second battery management system and requesting data from the second battery management system.",
    "10. The method of claim 9, wherein the address identifying the second battery management system is not sequential to the address identifying the first battery management system.",
    "11. The method of claim 9, further comprising determining whether each of the plurality of the battery management systems has been sent a data request, and when it is determined that each of the plurality of the battery management systems has been sent a data request, the energy management system is further configured to set the communication interval time again.",
    "12. The method of claim 9, further comprising continuously and sequentially updating the address identifying one of the plurality of battery management systems to be selected.",
    "13. The method of claim 9, further comprising before transmitting the first command, transmitting a verification signal to the first selected battery management system; receiving a response to the verification signal from the first selected battery management system; and determining whether there is an abnormality associated with the first selected battery management system based on the response received to the verification signal.",
    "14. The method of claim 9, further comprising: upon determining that there is an abnormality associated with the first selected battery management system, performing a fault diagnosis process.",
    "15. The method of claim 9, further comprising: identifying a first time corresponding to the termination of communications between the energy management system and the first selected battery management system; and determining a time for the transmission of the second command, based on the identified first time and the communication interval time.",
    "16. The method of claim 9, wherein the electric vehicle power management system further comprises an external data bus connected to the energy management system, wherein the method further comprises: transmitting communication data from the energy management system and to receive communication data for the energy management system through the external data bus, wherein the external data bus is configured for bidirectional communication with at least one of a vehicle control unit, a charging unit, or a user interface."
  ],
  "description_excerpt": "The present invention relates to a power management systems for electric batteries, for example, batteries within electric vehicle motors and other electric devices.\n\nBattery charging and power management technologies are an important part of the development of new electric battery-powered devices, such as electric vehicles. For example, a plurality of battery modules may be the power source of an electric vehicle and may play an important role in the operation of the electric vehicle. Effective management and monitoring of the battery may be a critical technology, and thus the battery management system becomes an essential part of the electric vehicle. Battery management systems in electric vehicles may monitor battery voltage, current, temperature, and other battery parameters and conditions necessary to ensure the effective operation of the battery. Such data may be stored and provided to various control circuits and systems within the battery pack and/or within the electric device (e.g., a vehicle control unit of an electric vehicle). In some cases, battery packs may use pluralities of replaceable battery modules, creating complications and difficulties for ongoing monitoring and management of the battery modules.\n\nIn view of the above, the present invention relates to power management systems for electric devices, such as electric vehicles.\n\nCertain aspects of the present invention relate to power management system for electric vehicle.",
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  "assignees": [
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  "inventors": [
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  "filing_date": "2017-02-23",
  "publication_date": "2019-03-12",
  "grant_date": "2019-03-12",
  "priority_date": "2015-03-16",
  "application_number": "US-201715440229-A",
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