Communication architecture for battery system

Abstract

The utility model relates to a communication architecture used for a battery system, comprising a communication module used for collecting battery performance parameters of a battery and adjusting battery performance according to adjusting parameters; the battery management system is used for receiving battery performance parameters of the battery and transmitting adjustment parameters to the battery through the communication module; the vehicle control unit is connected with the battery management system and can analyze and process battery performance parameters provided by the battery management system and synchronously feed adjustment parameters back to the battery management system. The communication module can be applied to a distributed battery system and an extensible battery system, and the communication module can be replaced independently. In addition, no physical connection exists between the battery and the communication module, so that the risks of water leakage, gas leakage and dust entering the battery system do not exist.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy electric vehicle batteries, and in particular to a communication architecture for a battery system. Background Art

[0002] The energy and environmental problems caused by the automobile industry around the world have made the research and development of new energy electric vehicles an urgent task in today's world. New energy electric vehicles are an effective way to solve the energy and environmental problems faced by automobile transportation. The battery system is the most important component of the power system of new energy electric vehicles. Scalable, distributed battery systems and quick-change battery systems are also increasingly used in new energy vehicles. Therefore, higher requirements are also put forward for the communication architecture of scalable, distributed battery systems and quick-change battery systems when installed with the whole vehicle, especially fast, reliable and easy-to-implement communication architecture has also become one of the key technologies. The current implementation method is mainly to connect the wiring harness and contact-type structural components to realize the communication connection between the battery pack and the whole vehicle. The shortcomings of many wiring harnesses, complex operation, and poor structural connection reliability limit the development of scalable distributed battery systems and quick-change battery systems.

[0003] Patent application number: 202222598928.7, application date: 2022.09.29, a battery external communication line assembly structure and a battery, wherein the battery external communication line assembly structure includes a plug, a communication line and a battery cover; a socket is provided on the top surface of the battery cover, and the plug can be plugged into the socket, and an upwardly protruding support platform is provided on the top surface of the battery cover, and the support platform is arranged on the outside of the plug and the socket, and the top surface of the support platform is higher than the height of the plug; the support platform is provided with a wiring groove, and the communication line is arranged in the wiring groove and is lower than the top surface of the support platform, the inner end of the communication line is connected to the plug, and the outer end of the communication line extends out of the wiring groove. The utility model is provided with a wiring groove through the support platform arranged on the outside of the plug and the socket; and the top surface of the support platform is higher than the height of the plug and the communication line, which can effectively protect the plug and the communication line, prevent the plug and the communication line from being squeezed and damaged, and ensure stable communication; and the structure is compact and easy to use.

[0004] The above-mentioned prior art adopts wired communication, and connects the battery and the battery management system through a communication harness and a plug to achieve communication. However, if a communication failure occurs, the communication harness is connected to the battery, making it difficult to replace; at the same time, because it is a physical connection, the battery cannot be arbitrarily replaced.

[0005] In addition, due to the use of physical connection, the connection reliability is poor, and the communication wiring harness will inevitably have lines that age or become damp, and damp plugs will further affect communication. Utility Model Content

[0006] In view of the fact that the communication method in the prior art adopts wired connection, the connection reliability is poor, the communication harness is difficult to replace when a communication failure occurs, and the communication harness will inevitably have defects such as line aging or moisture. The utility model provides a communication architecture for a battery system.

[0007] The technical solution provided by the utility model is:

[0008] A communication architecture for a battery system, comprising a communication module, which is used to collect battery performance parameters of a battery and to adjust the battery performance according to adjustment parameters; a battery management system, which is used to receive the battery performance parameters of the battery and transmit the adjustment parameters to the battery through the communication module; and a vehicle controller, which is connected to the battery management system and can analyze and process the battery performance parameters provided by the battery management system and synchronously feed back the adjustment parameters to the battery management system.

[0009] Preferably, the communication module includes a battery communication module and a near field communication module close to the battery communication module; the battery communication module is installed on the battery, and the near field communication module is electrically connected to a battery management system.

[0010] Preferably, the sensing system is integrated into the battery communication module and the near field communication module to realize wireless communication between the battery communication module and the near field communication module; when the sensing system is working, the battery communication module and the near field communication module are within a proximity distance of no more than 10 mm.

[0011] Preferably, the battery communication module is used to collect battery performance parameters and feed them back to the near field communication module, and the battery communication module is used to receive adjustment parameters sent by the near field communication module to adjust the performance of the battery.

[0012] Preferably, the near-field communication module, the battery management system, and the vehicle controller are electrically connected in sequence via a communication harness; the battery management system and the near-field communication module exchange information on battery performance parameters.

[0013] Preferably, the battery includes a first battery subsystem and a second battery subsystem connected in series or in parallel with the first battery subsystem; the battery communication module includes a first battery communication module installed in the first battery subsystem and a second battery communication module installed in the second battery subsystem.

[0014] Preferably, the near field communication module comprises a first near field communication module and a second near field communication module; the first near field communication module and the second near field communication module are electrically connected via a communication harness.

[0015] Preferably, the amounts of electricity carried by the first battery subsystem and the second battery subsystem may be the same or different.

[0016] Preferably, the battery communication module and the near field communication module have a thickness not exceeding 5 mm.

[0017] Preferably, the battery performance parameter is one or more of voltage, temperature and current.

[0018] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0019] The communication module of the utility model can simultaneously collect battery performance parameter information and adjust the battery according to the adjustment parameters. It can be applied to distributed battery systems and expandable battery systems. Each battery subsystem corresponds to a battery communication module. If a certain module fails, it can be replaced separately.

[0020] In addition, both the battery communication module and the near-field communication module are equipped with a sensor system. As long as the distance requirements are met, the two can achieve wireless communication and complete information exchange of battery performance parameters, and the battery subsystems can be swapped at will; there is no physical connection between the battery and the communication module, and there is no risk of water leakage, air leakage, and dust entering the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a communication architecture for a battery system in one embodiment of the present application;

[0022] Figure 2 This is a schematic diagram of the overall structure of a communication architecture including two battery subsystems in one embodiment of the present application.

[0023] Explanation of the symbols in the schematic diagram:

[0024] Battery 1, first battery subsystem 11, second battery subsystem 12; battery communication module 21, first battery communication module 211, second battery communication module 212; near-field communication module 22, first near-field communication module 221, second near-field communication module 222; battery management system 3; vehicle controller 4; communication harness 5. DETAILED DESCRIPTION

[0025] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.

[0026] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0027] The present application discloses a communication architecture for a battery system, including a battery 1, a battery communication module 21, a near field communication module 22, a battery management system 3, a vehicle controller 4, and a communication harness 5. The battery management system 3 integrates multiple functional modules, and reasonably coordinates the communication operation between the modules, processes and filters the battery 1 operation data, stores key data, and communicates with the vehicle controller 4.

[0028] The battery management system 3 is located between the vehicle controller 4 and the near-field communication module 22 , and the communication harness 5 connects the near-field communication module 22 , the battery management system 3 and the vehicle controller 4 in sequence, so as to complete information exchange between the vehicle controller 4 and the battery management system 3 , and between the battery management system 3 and the near-field communication module 22 .

[0029] The battery communication module 21 is installed on the battery 1, and a near-field communication module 22 is arranged corresponding to the battery communication module 21. The battery communication module 21 and the near-field communication module 22 have no physical connection, and both are equipped with a sensor system. As long as the close distance does not exceed 10mm, the battery communication module 21 and the near-field communication module 22 can achieve wireless communication. The thickness range of the battery communication module 21 and the near-field communication module 22 is 0.5mm to 5mm.

[0030] The battery communication module 21 can collect the performance parameters of the battery 1 during operation, including information such as the voltage, temperature and current of the battery 1, and feed it back to the near-field communication module 22 through wireless communication. The near-field communication module 22 is electrically connected to the battery management system 3 through the communication harness 5. The battery management system receives the battery performance parameters transmitted by the near-field communication module 22 and analyzes them to determine whether the battery 1 has internal polarization, overcharging and other faults, and transmits the feedback to the vehicle controller 4 through the communication harness 5.

[0031] The vehicle controller 4 is the core control unit of the new energy vehicle. It analyzes the signal transmitted by the battery management system 3 and issues corresponding adjustment parameter instructions to the battery management system 3. For example, when the temperature of the battery 1 is too high or too low, the vehicle controller 4 sends a control instruction for cooling or heating the battery management system 3. The battery management system 3 transmits this instruction to the near-field communication module 22. The battery communication module 21 interacts with the near-field communication module 22 through information, receives this instruction, and completes the cooling or heating of the battery to ensure that the battery 1 operates at the most suitable temperature and prolongs the service life of the battery 1.

[0032] In addition, through the above communication architecture, overvoltage and undervoltage protection, overcurrent protection, short circuit protection, etc. can be provided for the battery 1.

[0033] The battery 1 may include several subsystems. There is no limit to the number of subsystems. Take two as an example: the battery 1 includes a first battery subsystem 11 and a second battery subsystem 12. The first battery subsystem 11 and the second battery subsystem 12 are connected in series or in parallel, and their positions can be swapped arbitrarily.

[0034] More specifically, the first battery subsystem 11 is equipped with a first battery communication module 211, and a first near-field communication module 221 is correspondingly provided. The first battery communication module 211 and the sensor system provided inside the first near-field communication module 221 realize wireless communication and information exchange; the second battery subsystem 12 is equipped with a second battery communication module 212, and a second near-field communication module 222 is correspondingly provided. The second battery communication module 212 and the sensor system provided inside the second near-field communication module 222 realize wireless communication and information exchange. The communication harness 5 sequentially connects the first near-field communication module 221 and the second near-field communication module 222, and connects the battery management system 3 and the vehicle controller 4.

[0035] Different from a single battery, the battery management system 3 can assign different control instructions to the first near field communication module 221 and the second near field communication module 222 .

[0036] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A communication architecture for a battery system, characterized in that: include, A communication module, the communication module is used to collect battery performance parameters of the battery (1) and to adjust the battery performance according to the adjustment parameters; A battery management system (3), the battery management system (3) being used to receive battery performance parameters of the battery (1) and transmit adjustment parameters to the battery (1) via the communication module; A vehicle controller (4), which is connected to the battery management system (3), is capable of analyzing and processing battery performance parameters provided by the battery management system (3), and synchronously feeding back adjustment parameters to the battery management system (3).

2. A communication architecture for a battery system according to claim 1, characterized in that: The communication module comprises a battery communication module (21) and a near field communication module (22) close to the battery communication module (21); the battery communication module (21) is installed on the battery (1), and the near field communication module (22) is electrically connected to the battery management system (3).

3. The communication architecture for a battery system according to claim 2, characterized in that: The sensor system is integrated into the battery communication module (21) and the near-field communication module (22) to realize wireless communication between the battery communication module (21) and the near-field communication module (22); when the sensor system is working, the battery communication module (21) and the near-field communication module (22) are within a proximity distance of no more than 10 mm.

4. A communication architecture for a battery system according to any one of claims 2 or 3, characterized in that: The battery communication module (21) is used to collect battery performance parameters and feed them back to the near field communication module (22), and the battery communication module (21) is used to receive adjustment parameters sent by the near field communication module (22) to adjust the performance of the battery (1).

5. The communication architecture for a battery system according to claim 2, characterized in that: The near-field communication module (22), the battery management system (3), and the vehicle controller (4) are electrically connected in sequence via a communication harness (5); the battery management system (3) and the near-field communication module (22) exchange information on battery performance parameters.

6. The communication architecture for a battery system according to claim 2, characterized in that: The battery (1) comprises a first battery subsystem (11) and a second battery subsystem (12) connected in series or in parallel with the first battery subsystem (11); the battery communication module (21) comprises a first battery communication module (211) installed on the first battery subsystem (11) and a second battery communication module (212) installed on the second battery subsystem (12).

7. The communication architecture for a battery system according to claim 6, characterized in that: The near field communication module (22) comprises a first near field communication module (221) and a second near field communication module (222); the first near field communication module (221) and the second near field communication module (222) are electrically connected via a communication harness (5).

8. The communication architecture for a battery system according to claim 2, characterized in that: The battery communication module (21) and the near field communication module (22) have a thickness not exceeding 5 mm.

9. The communication architecture for a battery system according to claim 1, characterized in that: The battery performance parameter is one or more of voltage, temperature, and current.

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