Battery module
By designing exhaust areas for the cover plate and insulation plate in the battery module, the gas exhaust path is simplified, solving the problem of low exhaust efficiency in the battery module and achieving rapid exhaust and improved stability.
Patent Information
- Application Number
- CN202520311312.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-25
AI Technical Summary
Existing battery modules have low venting efficiency, which cannot relieve internal pressure in a timely manner, increasing safety hazards.
A battery module is designed, including a cell stack, a frame, a cover plate, and an insulating plate. The cover plate and the insulating plate have first and second exhaust regions on the top of the cell stack. Gas is naturally discharged through these regions, simplifying the exhaust path and improving exhaust efficiency.
This improves the venting efficiency of the battery module, relieves internal pressure in a timely manner, reduces safety hazards, and enhances the stability and performance of the battery module.
Smart Images
Figure CN223858372U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery equipment technical field, especially to a battery module. BACKGROUND
[0002] In the operation process of the battery module, the battery cell will have a series of complex electrochemical reactions. These reactions will produce gases such as hydrogen and methane, causing the internal gas pressure of the battery module to gradually rise. If these gases cannot be effectively discharged in time, it may cause serious consequences. On the one hand, the high internal gas pressure will exert a great pressure on the shell of the battery module, which may cause the shell to deform or even rupture under long-term action, affecting the structural integrity and stability of the battery module. On the other hand, the accumulated gas may cause combustion or explosion under certain conditions, seriously threatening the safe operation of the equipment.
[0003] At present, the battery module of the related technology adopts a simple sealing structure without a dedicated exhaust passage. This makes it impossible to discharge the gas, causing the internal pressure to continuously rise and greatly increasing the safety hazard. While some other battery modules have an exhaust structure, the exhaust efficiency of the battery module is low, the gas is discharged slowly, and the internal pressure cannot be relieved in time. SUMMARY
[0004] The main purpose of the utility model is to provide a battery module, which aims to solve the technical problem of low exhaust efficiency of the battery module in the related technology.
[0005] In order to achieve the above-mentioned utility model purposes, the utility model provides a battery module.
[0006] A battery module comprises:
[0007] a battery cell stack;
[0008] a frame forming a mounting cavity with an opening at the top, the battery cell stack being arranged in the mounting cavity;
[0009] a cover plate arranged on the top of the frame and sealing the opening, the cover plate being provided with a first exhaust area, the first exhaust area being in communication with the mounting cavity;
[0010] an insulating plate arranged on the side of the cover plate away from the battery cell stack, the insulating plate being provided with a second exhaust area, the second exhaust area being in communication with the first exhaust area and the mounting cavity, and the gas in the mounting cavity being able to be discharged to the outside of the frame through the first exhaust area and the second exhaust area.
[0011] In one embodiment, the projection of the first exhaust region in the vertical direction coincides with the projection of the second exhaust region in the vertical direction.
[0012] In one embodiment, a plurality of the first exhaust regions are provided, and the plurality of first exhaust regions are arranged at intervals along the length direction of the cover plate;
[0013] Along the length direction of the cover plate, the length of the first exhaust region located in the middle of the cover plate is greater than the length of the first exhaust regions located on both sides of the cover plate.
[0014] In one embodiment, a plurality of the second exhaust regions are provided, and the plurality of second exhaust regions are arranged at intervals along the length direction of the insulating plate; <(
[0015] Along the length direction of the insulating plate, the length of the second exhaust region located in the middle of the insulating plate is greater than the length of the second exhaust regions located on both sides of the insulating plate.
[0016] In one embodiment, the first exhaust region is formed by arranging a plurality of first exhaust holes along the width direction of the cover plate, and the second exhaust region is formed by arranging a plurality of second exhaust holes along the width direction of the insulating plate.
[0017] In one embodiment, the first exhaust holes are oval; and / or <000(0037>
[0018] the second exhaust holes are in the shape of "工".
[0019] In one embodiment, the battery module further includes a heating film, the heating film is disposed between the battery cell stack and the cover plate, and the heating film is used to heat the battery cell stack.
[0020] In one embodiment, the heating film is located in the interval region between two adjacent first exhaust regions.
[0021] In one embodiment, the battery cell stack includes a plurality of battery cell bodies and a plurality of aluminum fins, the side surface of the battery cell body is adhered to the aluminum fin, the plurality of battery cell bodies and the plurality of aluminum fins are both arranged, and the plurality of aluminum fins are arranged at intervals between adjacent battery cell bodies;
[0022] The aluminum fin is provided with a third exhaust hole, the third exhaust hole communicates with the installation cavity, and the heat generated by the battery cell body can flow to the installation cavity through the third exhaust hole.
[0023] In one embodiment, the projection of the third exhaust hole in the vertical direction coincides with the projection of the first exhaust region in the vertical direction.
[0024] Beneficial effects:
[0025] The battery module of this utility model includes a cell stack, a frame, a cover plate, and an insulating plate. The frame forms a mounting cavity with an opening at the top, and the cell stack is disposed within the mounting cavity. The cover plate covers the top of the frame and seals the opening. The cover plate has a first venting area, which communicates with the mounting cavity. The insulating plate is disposed on the side of the cover plate away from the cell stack. The insulating plate has a second venting area, which communicates with the first venting area and the mounting cavity. Gas in the mounting cavity can be discharged to the outside of the frame through the first and second venting areas. The cover plate and the insulating plate are disposed on the top of the cell stack, meaning the first and second venting areas are located on the top of the cell stack. When the cell stack undergoes an electrochemical reaction that generates gas, the gas can naturally gather upwards under its own buoyancy and be discharged through the first and second venting areas at the top of the cell stack. The first and second venting areas are located in the natural diffusion direction of the gas, improving the venting efficiency of the battery module, increasing the gas discharge speed, and promptly relieving the internal pressure of the battery module. Attached Figure Description
[0026] Fig. 1 This is an exploded view of a battery module according to an embodiment of the present invention.
[0027] Fig. 2 This is a schematic diagram of the exhaust path according to an embodiment of the present invention.
[0028] Fig. 3 This is a schematic diagram of the structure of the battery cell body and aluminum fins according to an embodiment of the present invention.
[0029] in:
[0030] 100. Cell stack; 110. Cell body; 120. Aluminum fins; 121. Third exhaust port;
[0031] 200. Framework;
[0032] 300. Cover plate; 310. First exhaust area; 311. First exhaust port;
[0033] 400. Insulating board; 410. Second exhaust area; 411. Second exhaust port;
[0034] 500. Heating film.
[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0036] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0037] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.
[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0040] like Figs. 1-3As shown, in some embodiments, a battery module includes a cell stack 100, a frame 200, a cover plate 300, and an insulation plate 400. The frame 200 forms a mounting cavity with an opening at the top, and the cell stack 100 is arranged in the mounting cavity. The cover plate 300 is arranged on the top of the frame 200 and seals the opening, and the cover plate 300 is provided with a first exhaust area 310, which is in communication with the mounting cavity. The insulation plate 400 is arranged on the side of the cover plate 300 away from the cell stack 100, and the insulation plate 400 is provided with a second exhaust area 410, which is in communication with the first exhaust area 310 and the mounting cavity, and the gas in the mounting cavity can be discharged to the outside of the frame 200 through the first exhaust area 310 and the second exhaust area 410.
[0041] The cover plate 300 and the insulation plate 400 are arranged on the top of the cell stack 100, that is, the first exhaust area 310 and the second exhaust area 410 are arranged on the top of the cell stack 100. When the cell stack 100 generates gas through an electrochemical reaction, the gas can naturally accumulate upward under the action of its own buoyancy and be discharged through the first exhaust area 310 and the second exhaust area 410 on the top of the cell stack 100. The first exhaust area 310 and the second exhaust area 410 are located in the natural diffusion direction of the gas, which improves the exhaust efficiency of the battery module, increases the discharge speed of the gas, and timely relieves the pressure inside the battery module.
[0042] Specifically, the cell stack 100, as the core component of the battery module, is stacked by a plurality of cells according to a predetermined rule. The cell is the basic unit for realizing the storage and release of electric energy, and its performance and quality directly affect the overall performance of the battery module, such as battery capacity, charging and discharging efficiency, cycle life, etc.
[0043] In some embodiments, the projection of the first exhaust area 310 in the vertical direction coincides with the projection of the second exhaust area 410 in the vertical direction. That is, the first exhaust area 310 and the second exhaust area 410 are arranged in correspondence in the vertical direction. This spatial layout can simplify the gas discharge path, reduce unnecessary obstacles to the gas during discharge, and improve the exhaust efficiency.
[0044] When the gas is generated around the cell stack 100 and diffuses upward to the cover plate 300, since the position of the first exhaust area 310 corresponds to the second exhaust area 410 in the vertical direction, the gas does not move laterally in a complex manner, but can directly enter the second exhaust area 410 through the first exhaust area 310, and finally be discharged to the outside of the frame 200. This direct and smooth exhaust path reduces the resistance and energy loss of the gas during discharge.
[0045] In some embodiments, a plurality of first exhaust regions 310 are provided, and the plurality of first exhaust regions 310 are spaced apart along the length direction of the cover plate 300; along the length direction of the cover plate 300, the length of the first exhaust region 310 located in the middle of the cover plate 300 is greater than the length of the first exhaust regions 310 located on both sides of the cover plate 300. The length direction of the cover plate 300 can be [missing information]. Fig. 2 The X-axis direction in the diagram.
[0046] It should be noted that, typically, the central area of the battery module is the core region of the cell stack 100, where chemical reactions are more intense and a relatively larger amount of gas is generated. Therefore, a larger venting area is needed to ensure the smooth discharge of these gases. Conversely, the sides of the battery module generate relatively less gas, allowing for smaller venting areas. This design satisfies venting requirements while avoiding unnecessary space waste.
[0047] In some embodiments, multiple second exhaust regions 410 are provided, and the multiple second exhaust regions 410 are spaced apart along the length direction of the insulating plate 400. Along the length direction of the insulating plate 400, the length of the second exhaust region 410 located in the middle of the insulating plate 400 is greater than the length of the second exhaust regions 410 located on both sides of the insulating plate 400. The second exhaust regions 410 are correspondingly provided to the first exhaust regions 310. The length direction of the insulating plate 400 can be [missing information - likely a specific direction or configuration]. Fig. 2 The X-axis direction in the diagram.
[0048] In some embodiments, the first venting region 310 is formed by arranging a plurality of first venting holes 311 along the width direction of the cover plate 300, and the second venting region 410 is formed by arranging a plurality of second venting holes 411 along the width direction of the insulating plate 400. The width direction of the cover plate 300 and the width direction of the insulating plate 400 can be [missing information]. Fig. 2 The Y-axis direction in the diagram.
[0049] It should be noted that the first exhaust region 310 and the second exhaust region 410 are closely coordinated in structure and function, together forming the exhaust system of the battery module. Structurally, the multiple first exhaust holes 311 of the first exhaust region 310 and the multiple second exhaust holes 411 of the second exhaust region 410 correspond to each other in spatial position. The first exhaust holes 311 are arranged along the width direction of the cover plate 300, and the insulating plate 400 is arranged along the width direction of the insulating plate 400, forming a regular network of gas exhaust channels.
[0050] Specifically, the first exhaust hole 311 is a regular shape such as ellipse, circle, square, or polygon. The second exhaust hole 411 is in the shape of an "I". The first exhaust hole 311 and the second exhaust hole 411 can also be irregular shapes, which are not limited here.
[0051] In some embodiments, the battery module further comprises a heating film 500 disposed between the cell stack 100 and the cover plate 300, and the heating film 500 is configured to heat the cell stack 100.
[0052] It should be noted that the heating film 500 is usually made of a material with good thermal conductivity and electrical insulation performance, such as polyester film (PET), polyimide film (PI), etc., and has a conductive circuit on the surface of the film through printing, etching or other processes. When the heating film 500 is powered, the current passes through the conductive circuit, and due to the existence of resistance, the electrical energy is converted into heat energy, causing the temperature of the heating film 500 to rise, and then transferring heat to the cell stack 100 below, achieving heating of the cell stack 100. By precisely controlling the heating power and heating time of the heating film 500, the temperature of the cell stack 100 can be maintained within an appropriate working range, thereby effectively improving the performance and reliability of the battery module in a low-temperature environment.
[0053] In some embodiments, the heating film 500 is located on the spacing area between two adjacent first exhaust areas 310. That is, the heating film 500 is not on the exhaust path formed by the first exhaust area 310 and the second exhaust area 410, and does not interfere with the exhaust efficiency. By arranging in this way, the thermal management efficiency of the battery module is significantly improved by concentrating the heating and exhaust functions on the top of the cell stack 100. In terms of heating, the heating film 500 is directly arranged on the top of the cell stack 100, which can achieve rapid and efficient heating of the cells. This direct contact heating method reduces the loss in the heat transfer process, improves the heating efficiency, and enables the cells to reach the appropriate working temperature in a shorter time, thereby meeting the startup and normal operation requirements of the battery module in low temperature environments. In terms of exhaust, the exhaust port is located in the spacing space between two adjacent heating films 500, directly connected to the hot air accumulation area on the top of the cell stack 100, forming an efficient exhaust path. When the hot air generated by the cell stack 100 rises to the top, it can be quickly exhausted to the outside of the battery module through the exhaust port. This rapid exhaust mechanism effectively avoids the accumulation of hot air inside the battery module, reducing the risk of damage to the cells and other components due to overheating. At the same time, by timely exhausting the hot air, the working temperature of the cells can be effectively maintained within the appropriate range, improving the performance and stability of the battery module. In addition, the coordinated design of heating and exhaust on the top makes the heat management inside the battery module more efficient and orderly. The hot air generated during the heating process can be promptly exhausted, providing a good environment for the new heating process and avoiding the problem of reduced heating efficiency due to the accumulation of hot air. At the same time, the heat carried away during the exhaust process can also promote the redistribution of heat inside the battery module, making the temperature of the cells more uniform and further improving the performance and reliability of the battery module. This technical solution optimizes the layout of the heating and exhaust system, forms an efficient exhaust path, and realizes the coordinated work of heating and exhaust, significantly improving the thermal management efficiency of the battery module and providing strong protection for the stable operation of the battery module under different environmental conditions.
[0054] In some embodiments, the electric cell stack 100 comprises a plurality of electric cell bodies 110 and a plurality of aluminum fins 120, the non-tab end side of the electric cell bodies 110 is attached to the aluminum fins 120, the plurality of electric cell bodies 110 and the plurality of aluminum fins 120 are arranged, and the plurality of aluminum fins 120 are arranged in a spaced manner between adjacent electric cell bodies 110. The top folded side of the aluminum fin 120 is provided with a third exhaust hole 121, and the third exhaust hole 121 is communicated with the mounting cavity. The heat generated by the electric cell body 110 can flow into the mounting cavity through the third exhaust hole 121. During the operation of the battery module, complex electrochemical reactions occur inside the electric cell body 110, and the chemical reactions produce gas. The third exhaust hole 121 provides a direct exhaust path for the gas, so that the gas generated by the electric cell body 110 can quickly enter the mounting cavity through the third exhaust hole 121, and then be discharged to the outside of the battery module through the first exhaust area 310 and the second exhaust area 410 which are communicated with the mounting cavity.
[0055] Specifically, the third exhaust hole 121 can be "L" shaped.
[0056] Specifically, the projection of the third exhaust hole 121 along the vertical direction coincides with the projection of the first exhaust area 310 along the vertical direction. In this way, the gas exhaust path is more direct and smooth, thereby improving the exhaust efficiency of the battery module.
[0057] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields based on the content of the present application specification and drawings, are also included in the patent protection range of the present application.
Claims
1. A battery module, characterized by, Comprising: A battery cell stack; A frame, the frame forming an installation cavity with an opening at the top, and the battery cell stack is disposed in the installation cavity; A cover plate, the cover plate covering the top of the frame and sealing the opening, the cover plate being provided with a first exhaust area, and the first exhaust area communicating with the installation cavity; An insulating plate, the insulating plate being disposed on a side of the cover plate背离 the battery cell stack, the insulating plate being provided with a second exhaust area, the second exhaust area communicating with the first exhaust area and the installation cavity, and gas in the installation cavity being able to be discharged to the outside of the frame through the first exhaust area and the second exhaust area.
2. The battery module of claim 1, wherein, A projection of the first exhaust area in the vertical direction coincides with a projection of the second exhaust area in the vertical direction.
3. The battery module of claim 1, wherein, The first exhaust area is provided as a plurality of first exhaust areas, and the plurality of first exhaust areas are arranged at intervals along the length direction of the cover plate; Along the length direction of the cover plate, the length of the first exhaust area located in the middle of the cover plate is greater than the length of the first exhaust areas located on both sides of the cover plate.
4. The battery module of claim 1, wherein, The second exhaust area is provided as a plurality of second exhaust areas, and the plurality of second exhaust areas are arranged at intervals along the length direction of the insulating plate; Along the length direction of the insulating plate, the length of the second exhaust area located in the middle of the insulating plate is greater than the length of the second exhaust areas located on both sides of the insulating plate.
5. The battery module of claim 1, wherein, The first exhaust area is formed by arranging a plurality of first exhaust holes along the width direction of the cover plate, and the second exhaust area is formed by arranging a plurality of second exhaust holes along the width direction of the insulating plate.
6. The battery module of claim 5, wherein, The first exhaust hole is oval-shaped; and / or The second exhaust hole is "I"-shaped.
7. The battery module of claim 1, wherein, The battery module further includes a heating film, the heating film being disposed between the battery cell stack and the cover plate, and the heating film being used to heat the battery cell stack.
8. The battery module of claim 7, wherein, The heating film is located in an interval area between two adjacent first exhaust areas.
9. The battery module of claim 1, wherein, The battery cell stack includes a plurality of battery cell bodies and a plurality of aluminum fins, the side surface of the battery cell body being adhered to the aluminum fin, the plurality of battery cell bodies and the plurality of aluminum fins being arranged, and the plurality of aluminum fins being arranged at intervals between adjacent battery cell bodies; The aluminum fin is provided with a third exhaust hole, the third exhaust hole communicating with the installation cavity, and heat generated by the battery cell body being able to flow into the installation cavity through the third exhaust hole.
10. The battery module of claim 9, wherein, A projection of the third exhaust hole in the vertical direction coincides with a projection of the first exhaust area in the vertical direction.