Power management in electric vehicles
First Claim
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 modules;
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 is connected to a corresponding battery module and is configured to manage one or more battery cells of its corresponding battery module;
an energy management system comprising an energy management processor and an energy management communication module, wherein the energy management system is configured to;
transmit a command to each of the plurality of battery management systems using a wireless frequency channel, the command carrying an address identifying a first selected battery management system;
wherein each of the plurality of battery management systems is further configured to use its respective battery management processor and battery management communication module to;
start receiving the command from the energy management system via the wireless frequency channel; and
before the command is completely received,compare the address in the command identifying the first selected battery management system to its unique battery management system address; and
determine, based on the comparison whether it is the first selected battery management system;
when determining that it is the first selected battery management system, continue receiving the command, and process and respond to the received command from the energy management system; and
when determining that it is not the first selected battery management system, stop receiving the command from the energy management system and discard partially received command.
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Accused Products
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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Citations
18 Claims
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1. An electric vehicle power management system used for managing a plurality of battery modules, the electric vehicle power management system comprising:
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a plurality of battery modules; 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 is connected to a corresponding battery module and is configured to manage one or more battery cells of its corresponding battery module; an energy management system comprising an energy management processor and an energy management communication module, wherein the energy management system is configured to; transmit a command to each of the plurality of battery management systems using a wireless frequency channel, the command carrying an address identifying a first selected battery management system; wherein each of the plurality of battery management systems is further configured to use its respective battery management processor and battery management communication module to; start receiving the command from the energy management system via the wireless frequency channel; and before the command is completely received, compare the address in the command identifying the first selected battery management system to its unique battery management system address; and determine, based on the comparison whether it is the first selected battery management system; when determining that it is the first selected battery management system, continue receiving the command, and process and respond to the received command from the energy management system; and when determining that it is not the first selected battery management system, stop receiving the command from the energy management system and discard partially received command. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for managing a plurality of battery modules, the method comprising:
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providing a plurality of battery modules; providing 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 is connected to a corresponding battery module and is configured to manage one or more battery cells of its corresponding battery module; providing an energy management system comprising an energy management processor and an energy management communication module; transmitting, by the energy management system, a command to each of the plurality of battery management systems using a wireless frequency channel, the command carrying an address identifying a first selected battery management system; starting receiving the command from the energy management system via the wireless frequency channel; and before the command is completely received, comparing the address in the command identifying the first selected battery management system to its unique battery management system address; and determining, based on the comparison whether it is the first selected battery management system; when determining that it is the first selected battery management system, continuing receiving the command, and processing and responding to the received command from the energy management system; and when determining that it is not the first selected battery management system, stopping receiving the command from the energy management system and discard partially received command. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification