Battery pack and battery

Abstract

The utility model provides a kind of battery pack and battery, the battery pack includes battery module and wire harness, battery module is equipped with explosion-proof valve;Wire harness is electrically connected with battery module;Passage is formed in battery pack, one end of passage is closed and the other end is open;Wire harness is arranged outside passage, the outlet of explosion-proof valve is located in passage;Passage is configured to limit the flow of the discharge of explosion-proof valve in passage when battery module thermal runaway, to isolate wire harness and discharge, it is beneficial to when battery module thermal runaway and spout discharge, high-temperature discharge does not directly contact wire harness. It is helpful to avoid that discharge causes thermal damage to wire harness insulation layer, to reduce the risk of short circuit and other electrical faults of wire harness, it is beneficial to improve the safety of battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically to battery packs and batteries. Background Technology

[0002] As a crucial energy source for electronic devices, the performance and safety of batteries are critical to product design and use. In recent years, the rapid development of portable devices, electric vehicles, and energy storage systems has led to increasing demands for battery energy density, consequently driving the widespread application of high-energy-density battery technology. However, this increased energy density also brings higher requirements for thermal management and safety protection.

[0003] In related technologies, once a battery experiences thermal runaway during use, it often releases a large amount of heat in a very short time, accompanied by a violent ejection of contaminated material. This ejected material may come into contact with nearby wiring harnesses, damaging the insulation layer and potentially causing electrical faults such as short circuits, posing a certain safety hazard. Utility Model Content

[0004] The present invention provides a battery pack and battery that can improve the technical problem of wire harnesses being easily damaged in related technologies.

[0005] In a first aspect, embodiments of the present invention provide a battery pack, comprising: The battery module is equipped with an explosion-proof valve; and The wiring harness is electrically connected to the battery module; The battery pack has a channel formed inside it, with one end of the channel closed and the other end open; the wiring harness is arranged outside the channel, and the outlet of the explosion-proof valve is located inside the channel; The channel is configured to restrict the flow of vented material discharged from the explosion-proof valve within the channel in the event of thermal runaway of the battery module, thereby isolating the wiring harness from the vented material.

[0006] By adopting the above technical solution, an isolation is formed between the wiring harness and the explosion-proof valve, which helps prevent high-temperature discharge materials from directly contacting the wiring harness in the event of thermal runaway and discharge from the battery module. This structural configuration helps avoid thermal damage to the wiring harness insulation layer caused by the discharge materials, thereby reducing the risk of electrical faults such as short circuits in the wiring harness and improving the safety of the battery pack.

[0007] In one embodiment, the system further includes a cover connected to the battery module, and the channel is located between the cover and the battery module.

[0008] By adopting the above technical solution, the channel is set between the cover and the battery module, so that when the cover is open, the explosion-proof valve inside the channel can be approached from the direction of the cover, which facilitates the inspection or operation of the explosion-proof valve during the installation or maintenance of the battery pack.

[0009] In one embodiment, the battery module is provided with a liquid guiding groove, which together with the cover body forms the channel.

[0010] By adopting the above technical solution, the liquid guide groove is used to limit the flow path of the discharged material when it is ejected, so as to form a physical isolation between the wire harness and the discharged material. This helps to avoid the discharged material from directly contacting the wire harness, reduce the risk of thermal damage to the wire harness caused by the discharged material, and thus help to improve the safety and reliability of the module structure.

[0011] In one embodiment, the cover is made of metal.

[0012] By adopting the above technical solution, the metal material has high heat resistance, which is suitable for dealing with the situation where the explosion-proof valve sprays high-temperature discharge material when the battery cell experiences thermal runaway. For example, the temperature of the discharge material can reach about 500°C. Therefore, it is beneficial to enhance the structural stability and reliability of the cover under extreme thermal shock conditions.

[0013] In one embodiment, the cover has an insulating film on at least the surface facing the battery module.

[0014] By adopting the above technical solution and setting an insulating film, it is helpful to avoid short circuits caused by accidental contact between the cover and conductive components (such as aluminum busbars) when the cover is made of metal, thereby improving the overall safety of existing battery modules.

[0015] In one embodiment, the insulating film is a PC film.

[0016] By adopting the above technical solution and using PC film as the insulating layer of the cover, it is beneficial to provide good electrical insulation performance while ensuring the structural strength and heat resistance of the metal material of the cover. This reduces the risk of short circuit between the cover and the conductive components in the battery module, and helps to improve the safety of the battery pack.

[0017] In one embodiment, the height of the liquid guiding groove is 15-25 mm.

[0018] By adopting the above technical solution, when the height of the liquid guide groove is set to 15mm to 25mm, it is beneficial to form a larger gap between the metal cover and the aluminum busbar in the battery module, which helps to increase the creepage distance between them. It also facilitates the formation of a larger channel cross-section, which is suitable for guiding the leakage and smoke out along the channel when the battery module experiences thermal runaway.

[0019] In one embodiment, the height of the liquid guiding groove is 18-22 mm.

[0020] By adopting the above technical solution, it is possible to balance structural compactness and functional reliability to a certain extent, so that the liquid guiding groove has an appropriate height, which helps to form a stable flow channel. This facilitates the timely removal of ejected leakage materials and smoke when thermal runaway occurs in the battery module, reducing the risk of them remaining in the module, thereby improving the module's thermal diffusion capability and electrical safety performance.

[0021] In one embodiment, the harness includes a first portion and a second portion, the first portion being disposed on one side of the channel and the second portion being disposed on the other side of the channel, the first portion and the second portion converging at the closed end of the channel.

[0022] By adopting the above technical solution, it is beneficial to concentrate the wire harnesses located on both sides of the channel at the closed end of the channel, which facilitates subsequent unified fixing, connection or lead-out, and helps to improve the standardization of wire harness layout and the convenience of assembly.

[0023] In one embodiment, the battery module includes a support, and the liquid guide groove of the battery module is formed in the support.

[0024] By adopting the above technical solution, the liquid guiding groove is formed on the support, which is conducive to realizing the liquid guiding function under the premise of structural integration, and facilitates unified mold processing and assembly, thereby simplifying the production process to a certain extent.

[0025] In one embodiment, the support is provided with reinforcing ribs that enclose the liquid guiding groove.

[0026] By adopting the above technical solution, the reinforcing ribs are used to form a liquid guiding groove, which helps to improve the structural strength of the support and also effectively isolates the wire harness from the discharged material, thereby improving electrical safety and structural stability.

[0027] Secondly, embodiments of this utility model provide a battery, including the battery pack described in the above technical solution.

[0028] By adopting the above technical solutions, it is helpful to prevent the risk of corrosion to the wiring harness caused by leaked materials, thereby improving the structural stability and safety of the battery pack to a certain extent.

[0029] The beneficial effects of the embodiments of this utility model are as follows: In embodiments of this invention, by providing a channel, isolation can be formed between the wiring harness and the explosion-proof valve. This helps prevent high-temperature discharge materials from directly contacting the wiring harness in the event of thermal runaway and discharge from the battery module. This helps avoid thermal damage to the wiring harness insulation layer caused by the discharge materials, thereby reducing the risk of electrical faults such as short circuits in the wiring harness and improving the safety of the battery pack. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a three-dimensional schematic diagram of the battery module provided in an embodiment of this utility model; Figure 2 This is a first partial schematic diagram of the battery module provided in an embodiment of the present invention; Figure 3 This is a second partial schematic diagram of the battery module provided in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the battery pack provided in an embodiment of this utility model.

[0032] Explanation of reference numerals in the attached figures: 100. Battery module; 110. Explosion-proof valve; 120. Bracket; 121. Reinforcing rib; 200. Channel; 210. Liquid guide groove; 300. Wiring harness; 310. First part; 320. Second part; 400. Cover. Detailed 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] According to the first aspect of this application, referring to Figures 1 to 4This disclosure provides a battery pack, including a battery module 100 and a wiring harness 300, wherein the wiring harness 300 is used for electrical connection with the battery module 100. The wiring harness 300 may include a cell acquisition circuit for collecting parameters such as cell voltage and temperature, so as to realize real-time monitoring of cell status.

[0035] In some embodiments, at least one battery module 100 is provided within the battery pack. Exemplarily, one, two, three, or four battery modules 100 may be provided within the battery pack. Each battery module 100 is equipped with an explosion-proof valve 110, which is used to release vents and fumes when the battery module 100 is in a thermal runaway state, thereby mitigating the continuous rise in internal pressure to some extent and helping to reduce the risk of structural damage caused by abnormal internal pressure accumulation.

[0036] In some embodiments, refer to Figure 1 and Figure 4 A channel 200 is formed within the battery pack, with one end closed and the other end open. Exemplarily, the channel 200 can be formed by solid components within the battery pack. For example, the channel 200 can be a structural region jointly defined by the cover 400 and the battery module 100, or it can be formed by the battery module 100 itself, or it can be configured as a structure independently formed on the cover 400. It should be understood that the channel 200 has a structure extending along its length. The closed end of the channel 200 is used to limit the flow direction of liquids or gases, while the open end facilitates the discharge of media such as leaks and fumes along the channel 200 to the outside of the battery pack, thereby improving the internal safety control capabilities of the battery pack to a certain extent.

[0037] In some embodiments, the wiring harness 300 is disposed outside the channel 200, and the outlet of the explosion-proof valve 110 is located inside the channel 200. The channel 200 is configured to restrict the flow of vented material discharged from the explosion-proof valve 110 within the channel 200 in the event of thermal runaway of the battery module 100, thereby isolating the wiring harness 300 from the vented material. When the battery module 100 experiences thermal runaway and triggers the explosion-proof valve 110, the high-temperature vented material can enter the channel 200 through the outlet of the explosion-proof valve 110 and be discharged along the length of the channel 200.

[0038] Channel 200 is configured to restrict the flow path of high-temperature gas and vented material during the release of gas and vented material from explosion-proof valve 110, causing the discharged vented material to flow within channel 200 and preventing it from spreading to areas outside channel 200. Wiring harness 300 is arranged outside channel 200, structurally forming a physical barrier between wiring harness 300 and the outlet of explosion-proof valve 110.

[0039] The above structural configuration facilitates the flow guidance of high-temperature venting materials and prevents them from directly contacting the wiring harness 300. Since the surface of the wiring harness 300 is typically covered with an insulating layer, its insulation performance is prone to degradation under high temperatures or contact with corrosive liquids, potentially leading to electrical faults such as short circuits. By placing the wiring harness 300 outside the channel 200 and establishing the channel 200 between the explosion-proof valve 110 and the wiring harness 300, the thermal impact of high-temperature venting materials on the insulation layer of the wiring harness 300 is reduced, lowering the electrical risks caused by insulation damage, thereby contributing to improved overall battery pack safety.

[0040] It should be understood that the “isolation” formed by channel 200 is not a complete seal or absolute barrier, but rather achieves liquid diversion and heat isolation through structural spacing and drainage path guidance, so as to reduce the temperature and chemical risk exposure of the environment where the wire harness 300 is located.

[0041] Furthermore, since one end of the channel 200 is closed and the other end is open along its length, a defined path for the discharge of vents and fumes is formed inside the channel 200. This structural arrangement helps guide high-temperature vents and gases out of the battery pack in a predetermined direction, reducing their disorderly diffusion within the internal space.

[0042] This directional discharge path allows for a more compact arrangement of the wiring harness 300 and other components inside the battery pack, improving space utilization and reducing overall size. Furthermore, compared to a structure with multiple outlets in the channel 200, the single-opening channel 200 structure avoids layout limitations and space waste caused by the additional space required for multiple outlets.

[0043] In some embodiments, refer to Figure 1 and Figure 4 It also includes a cover 400, which is connected to the battery module 100, and a channel 200 located between the cover 400 and the battery module 100. The channel 200 is typically defined by the opposing surfaces of the cover 400 and the battery module 100, has a certain spatial capacity and length, and is open at one end to facilitate the discharge of the medium.

[0044] The arrangement of the channel 200 ensures that the outlet of the explosion-proof valve 110 is located inside the channel 200, which isolates the explosion-proof valve 110 from other components within the battery pack. The cover 400 is designed to be openable, for example, by bolt or hinge connection, facilitating opening when needed. Since the channel 200 is located between the cover 400 and the battery module 100, when the cover 400 is open, the explosion-proof valve 110 inside the channel 200 can be easily accessed from the direction of the cover 400, enabling observation, inspection, or maintenance of the explosion-proof valve 110.

[0045] This structural arrangement improves the accessibility and ease of operation of the explosion-proof valve 110 during the installation, inspection, and maintenance of the battery pack, reduces the need to disassemble other components, and thus improves maintenance efficiency.

[0046] It should be understood that the “open state” is not limited to the complete disassembly of the cover 400, but also includes various implementation methods such as partial opening or flipping; “easy to access” means that the relevant operations can be performed more conveniently compared to when there is no such channel 200 structure.

[0047] In summary, by forming a channel 200 between the cover 400 and the battery module 100, the explosion-proof valve 110 can be conveniently maintained to a certain extent, which is beneficial to improving the safety management and ease of use of the battery pack.

[0048] In some embodiments, refer to Figure 2 and Figure 3 The battery module 100 is provided with a liquid guiding groove 210, which together with the cover 400 forms a channel 200. The liquid guiding groove 210 is usually a groove-shaped structure, used to limit the flow path when the discharged material is ejected, thereby guiding the high-temperature discharged material to flow in a predetermined direction.

[0049] By enclosing the liquid guide trough 210 and the cover 400 to form a channel 200, the flow path of the discharged material can be controlled, allowing the wiring harness 300 to be positioned outside the channel 200 and physically isolated from the discharged material. This isolation structure helps reduce the chance of the discharged material directly contacting the wiring harness 300 and reduces the risk of damage to the insulation layer of the wiring harness 300 due to high temperature or chemical corrosion.

[0050] In some embodiments, the cover 400 is made of metal. Metal has higher heat resistance than other materials, making it suitable for handling situations where the explosion-proof valve 110 ejects high-temperature discharges when the battery module 100 experiences thermal runaway. For example, the temperature of the discharges ejected when the battery module 100 experiences thermal runaway may reach approximately 500°C. In this case, the metal cover 400 can maintain structural stability, reducing the risk of deformation or damage due to high-temperature impacts, thereby improving the reliability of the battery pack under extreme thermal conditions.

[0051] In some embodiments, the cover 400 has an insulating film on at least the surface facing the battery module 100. This insulating film helps reduce the likelihood of accidental contact between the cover 400 and conductive components (such as aluminum busbars) within the battery module 100, especially when the cover 400 is made of metal, thereby reducing the risk of short circuits due to contact. This structural configuration improves the overall safety and reliability of the battery pack.

[0052] For example, the insulating film can be a high-insulation material such as polycarbonate (PC) film, polyimide (PI) film, epoxy resin coating, or polyurethane coating. These materials typically have good heat resistance, electrical insulation, and mechanical stability, which helps to improve the insulation effect of the metal cover 400 surface, thereby reducing the risk of short circuits to some extent and improving the safety and reliability of the battery pack.

[0053] In some embodiments, the insulating film is a PC film. Using a PC film as the insulating layer of the cover 400 helps to provide good electrical insulation while ensuring the structural strength and heat resistance of the metal material of the cover 400. This reduces the risk of short circuits between the cover 400 and the conductive components in the battery module 100, thereby improving the overall safety of the battery pack.

[0054] In some embodiments, the height of the liquid guiding groove 210 is 15-25 mm. When the height of the liquid guiding groove 210 is set to 15 mm to 25 mm, it is beneficial to form a larger gap between the metal cover 400 and the aluminum strip in the battery module 100, thereby helping to increase the creepage distance between them. It also facilitates the formation of a larger channel 200 cross section, which is suitable for guiding the leakage and smoke along the channel 200 to be discharged when the battery module 100 experiences thermal runaway.

[0055] For example, the height of the liquid guiding groove 210 can be 15 mm, 15.1 mm, 15.3 mm, 15.5 mm, 16.2 mm, 16.9 mm, 17.4 mm, 17.6 mm, 18.1 mm, 18.3 mm, 18.95 mm, 19.2 mm, 19.8 mm, 20.05 mm, 20.4 mm, 21.1 mm, 21.75 mm, 22.3 mm, 23.6 mm, 24.05 mm, 24.7 mm, or 25 mm, and this embodiment of the application does not limit it.

[0056] In some embodiments, the height of the liquid guiding channel 210 is 18-22 mm. This balances structural compactness and functional reliability to a certain extent, allowing the liquid guiding channel 210 to have an appropriate height. This helps to form a stable flow channel 200, facilitating the timely removal of ejected discharges and fumes in the event of thermal runaway in the battery module 100, reducing the risk of them remaining in the module, and thus improving the module's thermal diffusion capability and electrical safety performance.

[0057] In some embodiments, refer to Figure 2 and Figure 3 The wiring harness 300 includes a first part 310 and a second part 320. The first part 310 is disposed on one side of the channel 200, and the second part 320 is disposed on the other side of the channel 200. The first part 310 and the second part 320 converge at the closed end of the channel 200.

[0058] The above design allows the wire harness 300 to be laid out in both directions of the channel 200 and converge at the end of the channel 200, facilitating unified fixing, connection, or lead-out operations at the closed end of the channel 200, thereby improving the standardization of the wire harness 300 layout. On the one hand, this structure is suitable for the cable docking requirements between different components; on the other hand, it also helps improve the convenience and consistency of assembly operations, especially in scenarios with a large number of wire harnesses 300 or complex layouts.

[0059] In some embodiments, refer to Figure 2 and Figure 3 The battery module 100 includes a support 120, and a liquid guiding channel 210 of the battery module 100 is formed on the support 120. By integrating the liquid guiding channel 210 with the support 120, it is beneficial to achieve the function of guiding and distributing liquid without increasing the structural complexity, thereby improving the integration level of the structure. This design facilitates the use of a unified mold to process the support 120 and the liquid guiding channel 210, which helps to reduce the independent assembly steps of parts during the assembly process, thereby reducing manufacturing costs to a certain extent and improving production efficiency and assembly consistency. In addition, the liquid guiding channel 210, located on the support 120, can also provide a relatively clear liquid flow channel 200 in space-constrained environments, which is suitable for achieving orderly flow of coolant in multi-cell structures.

[0060] In some embodiments, refer to Figure 2 and Figure 3 The bracket 120 is provided with reinforcing ribs 121, which enclose a liquid guiding groove 210. By enclosing the liquid guiding groove 210 with reinforcing ribs 121, the liquid guiding path is limited without adding additional components; furthermore, the reinforcing ribs 121 themselves enhance the overall structural strength of the bracket 120. In addition, the liquid guiding groove 210 structure formed by the reinforcing ribs 121 provides physical isolation between the wiring harness 300 and any potential leaks, thereby facilitating spatial separation between the liquid guiding function and the electrical wiring, and contributing to improved electrical safety and structural stability of the module.

[0061] According to a second aspect of this application, this disclosure provides a battery including the battery pack described in the above embodiments. This power battery possesses all the beneficial effects of the aforementioned battery pack, which will not be elaborated upon herein.

[0062] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack, characterized in that, include: The battery module (100) is equipped with an explosion-proof valve (110); and The wiring harness (300) is electrically connected to the battery module (100); The battery pack has a channel (200) formed inside, one end of which is closed and the other end is open; the wiring harness (300) is arranged outside the channel (200), and the outlet of the explosion-proof valve (110) is located inside the channel (200); The channel (200) is configured to restrict the flow of vents discharged from the explosion-proof valve (110) within the channel (200) in the event of thermal runaway of the battery module (100), thereby isolating the wiring harness (300) from the vents.

2. The battery pack according to claim 1, characterized in that, It also includes a cover (400) connected to the battery module (100), and the channel (200) is located between the cover (400) and the battery module (100).

3. The battery pack according to claim 2, characterized in that, The battery module (100) is provided with a liquid guiding groove (210), which together with the cover (400) forms the channel (200).

4. The battery pack according to claim 3, characterized in that, The cover (400) is made of metal.

5. The battery pack according to claim 4, characterized in that, The cover (400) has an insulating film on at least the surface facing the battery module (100).

6. The battery pack according to claim 5, characterized in that, The insulating film is a PC film.

7. The battery pack according to claim 4, characterized in that, The height of the liquid guiding groove (210) is 15-25 mm.

8. The battery pack according to claim 7, characterized in that, The height of the liquid guiding groove (210) is 18-22 mm.

9. The battery pack according to any one of claims 1 to 8, characterized in that, The wire harness (300) includes a first part (310) and a second part (320). The first part (310) is disposed on one side of the channel (200), and the second part (320) is disposed on the other side of the channel (200). The first part (310) and the second part (320) converge at the closed end of the channel (200).

10. The battery pack according to any one of claims 1 to 8, characterized in that, The battery module (100) includes a bracket (120), and the liquid guide groove (210) of the battery module (100) is formed on the bracket (120).

11. The battery pack according to claim 10, characterized in that, The bracket (120) is provided with reinforcing ribs (121), which enclose the liquid guiding groove (210).

12. A battery, characterized in that, Includes the battery pack as described in any one of claims 1 to 11.

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