Battery pack

Abstract

The utility model provides a battery pack. The battery pack comprises at least one battery module, at least one first signal module used for collecting first signals and at least one second signal module used for collecting second signals, the battery module comprises a plurality of stacked battery cells, the first signal module is connected with the at least one battery cell through a first wire harness, and the second signal module is connected with the at least one battery cell through a second wire harness. A second signal module is connected with at least one battery cell through a second wire harness. In the embodiment of the utility model, the first signal is acquired through the first wire harness, and the second signal is adopted through the second wire harness, so that the first signal and the second signal can be respectively acquired in different wire harnesses, the interference between the signals is reduced, and the signal acquisition precision is improved; the first signal module and the second signal module are independently arranged, and when one signal module breaks down, the signal module can be independently replaced, so that the technical problems that the signal acquisition flexibility of the battery pack is poor and the maintenance is inconvenient are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to battery pack. BACKGROUND

[0002] In the related art, a low-voltage module collection module is arranged in the battery pack, and the low-voltage module collection module can be used to collect the voltage and temperature of the battery cell.Most of the low-voltage module collection modules use a wire harness collection or FPC collection scheme to simultaneously collect the voltage and temperature of the module.When it is necessary to adjust or replace the voltage or temperature collection wire harness, the voltage and temperature wire harness must be replaced at the same time, which is poor in flexibility and inconvenient to maintain.In addition, the voltage signal and the temperature signal are transmitted in the same wire harness, which can easily cause signal interference and reduce the collection accuracy.

[0003] Therefore, it is urgent to solve the above technical problems. SUMMARY

[0004] The embodiment of the utility model provides a kind of battery pack, can improve the technical problem that low-voltage module collection module in battery pack simultaneously collects voltage and temperature by single wire harness, poor flexibility, inconvenient maintenance, low collection accuracy.

[0005] The embodiment of the utility model provides a kind of battery pack, the battery pack includes:

[0006] At least one battery module, a battery module includes a plurality of stacked battery cells;

[0007] At least one first signal module for collecting first signal, a first signal module is connected with at least one battery cell by a first wire harness;

[0008] At least one second signal module for collecting second signal, a second signal module is connected with at least one battery cell by a second wire harness.

[0009] In an embodiment, a first signal module and a second signal module are arranged corresponding to a battery module, and the first wire harness and the second wire harness are arranged separately.

[0010] In an embodiment, the first signal module and the second signal module are both provided with an interface, the first wire harness is connected with the first signal module through the interface, and the second wire harness is connected with the second signal module through the interface.

[0011] In an embodiment, the interface includes a plug-in interface, a buckle interface.

[0012] In an embodiment, the battery pack comprises a first signal unit and a second signal unit, a plurality of the first signal modules are connected to the first signal unit through a third wire harness, the first signal unit is used for integrating a plurality of the first signal modules, a plurality of the second signal modules are connected to the second signal unit through a fourth wire harness, the second signal unit is used for integrating a plurality of the second signal modules, and the third wire harness and the fourth wire harness are arranged separately.

[0013] In an embodiment, the first signal unit and the second signal unit are each provided with an interface, the third wire harness is connected to the first signal unit through the interface, and the fourth wire harness is connected to the second signal unit through the interface.

[0014] In an embodiment, the first signal module comprises a first signal input sensor and a first signal output sensor, the first signal input sensor is connected to the first wire harness, and the first signal output sensor is connected to the third wire harness.

[0015] The second signal module comprises a second signal input sensor and a second signal output sensor, the second signal input sensor is connected to the second wire harness, and the second signal output sensor is connected to the fourth wire harness.

[0016] In an embodiment, the battery pack comprises a battery management system unit, and the first signal unit and the second signal unit are connected to the battery management system unit.

[0017] In an embodiment, the first signal module comprises a voltage acquisition module, and the second signal module comprises a temperature acquisition module.

[0018] In an embodiment, the battery module comprises a busbar, one end of the first wire harness away from the first signal module is connected to the busbar, and one end of the second wire harness away from the second signal module is connected to the busbar.

[0019] The embodiment of the utility model has the advantages of:

[0020] In the embodiment of the utility model, the first signal is collected through the first wire harness, and the second signal is collected through the second wire harness, so that the first signal and the second signal can be collected in different wire harnesses, the interference between signals is reduced, and the signal collection accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0022] Figure 1 is a structural schematic diagram of a battery pack provided by the embodiment of the present application;

[0023] Figure 2 is a structural schematic diagram of a first signal module provided by the embodiment of the present application;

[0024] Figure 3 is a structural schematic diagram of a second signal module provided by the embodiment of the present application;

[0025] Figure 4 is a structural schematic diagram of a first signal module and a first signal unit provided by the embodiment of the present application;

[0026] Figure 5 is a structural schematic diagram of a second signal module and a second signal unit provided by the embodiment of the present application.

[0027] Mark explanation:

[0028] Battery pack 1;

[0029] Battery module 10, battery cell 11, busbar 12;

[0030] First signal unit 20, first signal module 21, first signal input sensor 211, first signal output sensor 212, first wire harness 22, third wire harness 23;

[0031] Second signal unit 30, second signal module 31, second signal input sensor 311, second signal output sensor 312, second wire harness 32, fourth wire harness 33;

[0032] Battery management system unit 40. Specific implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0034] An embodiment of this utility model provides a battery pack 1, such as... Figure 1 As shown, the battery pack 1 includes at least one battery module 10, at least one first signal module 21 for acquiring a first signal, and at least one second signal module 31 for acquiring a second signal. The battery module 10 includes a plurality of stacked cells 11. The first signal module 21 is connected to at least one cell 11 through a first wiring harness 22, and the second signal module 31 is connected to at least one cell 11 through a second wiring harness 32.

[0035] The battery module 10 includes multiple stacked cells 11, which can be square cells 11, cylindrical cells 11, etc., but are not limited to these.

[0036] The first signal module 21 is used to collect a first signal from the battery cell 11. The first signal can be one of the following: temperature, voltage, etc. The first signal module 21 is connected to at least one battery cell 11 via a first wiring harness 22. When the first wiring harness 22 is connected to one battery cell 11, the first wiring harness 22 can be a single wire; when the first wiring harness 22 is connected to multiple battery cells 11, the first wiring harness 22 can be multiple wires, with one wire corresponding to one battery cell 11. The multiple battery cells 11 connected to the first wiring harness 22 can be multiple battery cells 11 in the same battery module 10, or multiple battery cells 11 in different modules.

[0037] The second signal module 31 is configured to collect the second signal of the battery cell 11. The second signal is different from the first signal, and the second signal can be one of temperature, voltage, and the like. When the first signal is a temperature signal, the second signal can be a voltage signal or other signals. The second signal module 31 is connected to at least one battery cell 11 through a second wire harness 32. When the second wire harness 32 is connected to one battery cell 11, the second wire harness 32 can be a single wire; when the second wire harness 32 is connected to multiple battery cells 11, the second wire harness 32 can be multiple wires, one wire corresponding to one battery cell 11. The multiple battery cells 11 connected by the second wire harness 32 can be multiple battery cells 11 in the same battery module 10, or multiple battery cells 11 in different modules.

[0038] The materials of the first wire harness 22 and the second wire harness 32 can be high-conductivity materials, thereby ensuring efficient conduction of current. The high-conductivity materials can be copper alloys or tinned copper wires, etc., and the high-conductivity materials are coated with high-quality insulating materials such as polyethylene, thereby ensuring safety and reliability.

[0039] Compared with the FPC in the related art, the wire harness is more stable in electrical performance and has strong anti-interference, and is particularly suitable for noise environments or application scenarios requiring high-current transmission. The wire harness can better control the contact resistance and connection stability in electrical transmission, and can avoid problems such as data loss or misjudgment caused by unstable transmission, thereby improving the overall reliability of the system. If used for a long time, the wire harness has better mechanical stability than the FPC and is not prone to breaking or performance degradation due to bending or vibration. At the same time, the FPC has more waste due to the need to avoid the explosion-proof valve of the battery cell 11, resulting in high cost of the FPC.

[0040] In an embodiment, as shown in FIG. 1, a battery module 10 is provided with a first signal module 21 and a second signal module 31, and the first wire harness 22 and the second wire harness 32 are separately provided. Figure 1 One battery module 10 is provided with the first signal module 21 and the second signal module 31 at the same time, so that two signals in the battery module 10 can be used at the same time, and the working state of the battery module 10 can be more comprehensively obtained.

[0041] In order to reduce the signal interference in the first wire harness 22 and the second wire harness 32 and improve the signal collection accuracy, the first wire harness 22 and the second wire harness 32 can be separately provided.

[0042] In the embodiment of the utility model, first signal is collected through first wiring harness 22, second signal is collected through second wiring harness 32, so that first signal and second signal can be collected in different wiring harnesses, the interference between signals is reduced, and the signal collection accuracy is improved;By independently arranging first signal module 21 and second signal module 31, when one of the signal modules fails, it can be replaced individually, thereby improving the poor signal collection flexibility and inconvenient maintenance of the battery pack.

[0043] Optionally, the first wiring harness 22 and the second wiring harness 32 can be arranged at intervals, thereby increasing the distance between the first wiring harness 22 and the second wiring harness 32, and further reducing the signal interference in the first wiring harness 22 and the second wiring harness 32. For example, the first wiring harness 22 can be arranged at one end of the cover plate of the battery cell 11, and the second wiring harness 32 can be arranged at the other end of the cover plate of the battery cell 11.

[0044] In an embodiment, the first signal module 21 and the second signal module 31 are each provided with an interface, the first wiring harness 22 is connected to the first signal module 21 through the interface, and the second wiring harness 32 is connected to the second signal module 31 through the interface.

[0045] The interface can be a standardized interface for easy connection with the wiring harness. For example, the interface includes a plug-in interface, a buckle interface, etc. The plug-in interface and the buckle interface are convenient for connection and disconnection, for long-term use, and for subsequent maintenance and replacement.

[0046] In an embodiment, the battery pack 1 includes a first signal unit 20 and a second signal unit 30, a plurality of first signal modules 21 are connected to the first signal unit 20 through a third wiring harness 23, and the first signal unit 20 is used to integrate the plurality of first signal modules 21; a plurality of second signal modules 31 are connected to the second signal unit 30 through a fourth wiring harness 33, and the second signal unit 30 is used to integrate the plurality of second signal modules 31, and the third wiring harness 23 and the fourth wiring harness 33 are arranged separately.

[0047] As shown in Figure 4 The first signal unit 20 is used to integrate a plurality of first signal modules 21, that is, the first signals of the plurality of first signal modules 21 are collected into the first signal module 21. The number of first signal modules 21 can be equal to the number of battery modules 10, that is, one battery module 10 is configured with one first signal module 21. The plurality of first signal modules 21 are connected to the first signal unit 20 through the third wiring harness 23. The first signal unit 20 can collect the first signals of the plurality of battery modules 10 in the battery pack 1.

[0048] As shown in Figure 5As shown, the second signal unit 30 is configured to integrate multiple second signal modules 31, that is, the second signals of the multiple second signal modules 31 are integrated into the second signal module 31. The number of the second signal modules 31 can be equal to the number of the battery modules 10, that is, one second signal module 31 is configured for one battery module 10. The multiple second signal modules 31 are connected to the second signal unit 30 through the fourth wire harness 33. The second signal unit 30 can collect the second signals of the multiple battery modules 10 in the battery pack 1. Through the above arrangement, when a second signal module 31 fails, the second signal module 31 can be replaced accordingly without replacing other second signal modules 31 and the second signal unit 30. The maintenance cost is reduced and the maintenance time is shortened.

[0049] Through the above arrangement, when a signal module fails, the signal module or the wire harness can be replaced accordingly without replacing other signal modules, signal units or wire harnesses, thereby reducing the maintenance cost and shortening the maintenance time. Meanwhile, the wire harness can be routed as needed, which is good in flexibility and can realize quick customization and on-site adaptation, and is suitable for complex signal collection systems without the need to make large-scale changes to the structure of the entire signal collection system.

[0050] In an embodiment, the first signal unit 20 and the second signal unit 30 are each provided with an interface, the third wire harness 23 is connected to the first signal unit 20 through the interface, and the fourth wire harness 33 is connected to the second signal unit 30 through the interface.

[0051] The interface is arranged in a manner similar to that in the above embodiment, which will not be repeated here.

[0052] The third wire harness 23 and the fourth wire harness 33 are arranged in a manner similar to that of the first wire harness 22, which will not be repeated here.

[0053] In an embodiment, as shown in Figure 1 and Figure 2 The first signal module 21 includes a first signal input sensor 211 and a first signal output sensor 212, the first signal input sensor 211 is connected to the first wire harness 22, and the first signal output sensor 212 is connected to the third wire harness 23.

[0054] As shown in Figure 1 and Figure 3 The second signal module 31 includes a second signal input sensor 311 and a second signal output sensor 312, the second signal input sensor 311 is connected to the second wire harness 32, and the second signal output sensor 312 is connected to the fourth wire harness 33.

[0055] When the first signal is a voltage signal and the second signal is a temperature signal, the first signal module 21 can be a voltage acquisition module, and the second signal module 31 can be a temperature acquisition module; the first signal unit 20 can be a total voltage module, and the second signal unit 30 can be a total temperature module. The first signal input sensor 211 can be a voltage input sensor, and the first signal output sensor 212 can be a voltage output sensor; the second signal input sensor 311 can be a temperature input sensor, and the second signal output sensor 312 can be a temperature output sensor.

[0056] In one embodiment, the battery pack 1 includes a battery management system unit 40, and a first signal unit 20 and a second signal unit 30 are connected to the battery management system unit 40.

[0057] The first signal unit 20 can be connected to the connector of the battery management system unit 40, and the second signal unit 30 can be connected to the connector of the battery management system.

[0058] The Battery Management System (BMS) unit 40 is a key component that ensures the safe and efficient operation of the battery pack 1. The BMS unit 40 is responsible for the intelligent management and maintenance of the battery module 10, monitoring the status of the cells 11, and preventing overcharging and over-discharging to extend the life of the cells 11.

[0059] The battery management system unit 40 receives first signals and second signals, etc., and accurately estimates the state of charge, health status and power status of the battery cell 11 through the above signals. It also performs equalization management, protection functions and fault diagnosis, charging management, thermal management, etc., to ensure the safe and efficient operation of the battery system.

[0060] In one embodiment, the first signal module 21 includes a voltage acquisition module, etc., and the second signal module 31 includes a temperature acquisition module, etc.

[0061] In one embodiment, such as Figure 1 As shown, the battery module 10 includes a busbar 12, with one end of the first wiring harness 22 away from the first signal module 21 connected to the busbar 12, and one end of the second wiring harness 32 away from the second signal module 31 connected to the busbar 12.

[0062] Bus 12 is used to connect multiple battery cells 11 in series and parallel. Bus 12 includes a positive bus and a negative bus, and bus 12 can be made of metal materials, such as copper or aluminum. The positive bus is electrically connected to the positive terminal of the battery cell 11, and the negative bus is electrically connected to the negative terminal of the battery cell 11.

[0063] The first wire harness 22 and the second electrode can be welded to the busbar 12 to acquire the signal of the battery cell 11.

[0064] The busbar 12, the first wire harness 22 and the second wire harness 32 can be part of a CCS collection structure (Cells Contact System). The CCS collection structure can also include plastic structural parts, etc. The CCS is installed in the battery module 10 to complete the functions of high-voltage series-parallel connection of the battery cells 11, temperature signal collection and voltage signal collection, etc.

[0065] The battery pack 1 of the present application can improve the flexibility and maintainability of the system, simplify the production and assembly process, optimize the complex process of the wire harness collection scheme, and improve the overall production efficiency and safety by modularizing the collection of voltage and temperature respectively.

[0066] The battery pack 1 of the present application can be applied to complex energy storage systems, automotive electronic systems and other application scenarios, but is not limited thereto.

[0067] The embodiments of the present application are described in detail above, and the principles and implementation modes of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation modes and application ranges will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A battery pack (1) characterized in that, The application relates to a battery pack (1) comprising: at least one battery module (10), wherein each battery module (10) comprises a plurality of stacked battery cells (11); at least one first signal module (21) for collecting a first signal, wherein each first signal module (21) is connected to at least one battery cell (11) through a first wire harness (22); at least one second signal module (31) for collecting a second signal, wherein each second signal module (31) is connected to at least one battery cell (11) through a second wire harness (32).

2. The battery pack (1) according to claim 1, characterized in that Each battery module (10) is provided with a first signal module (21) and a second signal module (31), and the first wire harness (22) and the second wire harness (32) are separately arranged.

3. The battery pack (1) according to claim 1, characterized in that Each first signal module (21) and second signal module (31) is provided with an interface, the first wire harness (22) is connected to the first signal module (21) through the interface, and the second wire harness (32) is connected to the second signal module (31) through the interface.

4. The battery pack (1) according to claim 3, characterized in that The interface comprises a plug-in interface or a buckle interface.

5. The battery pack (1) according to claim 3, characterized in that, The battery pack (1) comprises a first signal unit (20) and a second signal unit (30), a plurality of first signal modules (21) are connected to the first signal unit (20) through a third wire harness (23), the first signal unit (20) is used for integrating the plurality of first signal modules (21), a plurality of second signal modules (31) are connected to the second signal unit (30) through a fourth wire harness (33), and the second signal unit (30) is used for integrating the plurality of second signal modules (31), and the third wire harness (23) and the fourth wire harness (33) are separately arranged.

6. The battery pack (1) according to claim 5, characterized in that Each first signal unit (20) and second signal unit (30) is provided with an interface, the third wire harness (23) is connected to the first signal unit (20) through the interface, and the fourth wire harness (33) is connected to the second signal unit (30) through the interface.

7. The battery pack (1) according to claim 6, characterized in that The first signal module (21) comprises a first signal input sensor (211) and a first signal output sensor (212), the first signal input sensor (211) is connected to the first wire harness (22), and the first signal output sensor (212) is connected to the third wire harness (23). The second signal module (31) comprises a second signal input sensor (311) and a second signal output sensor (312), the second signal input sensor (311) is connected to the second wire harness (32), and the second signal output sensor (312) is connected to the fourth wire harness (33).

8. The battery pack (1) according to claim 5, characterized in that, The battery pack (1) comprises a battery management system unit (40), and the first signal unit (20) and the second signal unit (30) are connected to the battery management system unit (40).

9. The battery pack (1) according to any one of claims 1 to 8, characterized in that, The first signal module (21) comprises a voltage collection module, and the second signal module (31) comprises a temperature collection module.

10. The battery pack (1) according to any one of claims 1 to 8, characterized in that The battery module (10) comprises a busbar (12), one end of the first wire harness (22) away from the first signal module (21) is connected with the busbar (12), and one end of the second wire harness (32) away from the second signal module (31) is connected with the busbar (12).

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