Battery module with novel cooling structure
By introducing a heat sink design that contacts the outer casing in the battery module, the heat dissipation problem of lightweight power batteries is solved, achieving effective cell heat dissipation, extending battery life and maintaining battery capacity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU PYLON BATTERY CO LTD
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-14
AI Technical Summary
Existing lightweight power batteries lack heat dissipation structures, leading to increased temperature, which affects performance, accelerates aging, and shortens cycle life.
Heat sinks are introduced into the battery module. The heat sinks are inserted between the battery cells and contact the inner wall of the casing. Heat is conducted through the bends and thermally conductive adhesive to dissipate heat from the battery cells.
Effective heat dissipation ensures battery performance and extends battery life, while maintaining battery capacity without taking up extra space.
Smart Images
Figure CN224502038U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a battery module with a novel cooling structure. Background Technology
[0002] Currently, lightweight power batteries are quite active in the market, mainly used in electric two-wheelers or three-wheelers, with applications primarily categorized as electric motorcycles, electric tricycles, and smart battery swapping. Most current lightweight power batteries lack heat dissipation structures, leading to increased temperature during operation, affecting battery performance, accelerating battery aging, and shortening cycle life. Utility Model Content
[0003] The purpose of this application is to provide a battery module with a novel cooling structure, which to some extent solves the technical problem that most lightweight power batteries in the prior art do not have a heat dissipation structure, which leads to the temperature of the lightweight power battery rising during operation, affecting the battery's performance, accelerating battery aging, and shortening cycle life.
[0004] This application provides a battery module with a novel cooling structure, including: a housing and battery cells and heat sinks disposed within the housing; wherein, there are multiple battery cells, and the multiple battery cells are stacked sequentially along a first preset direction to form a battery cell assembly; the heat sinks are inserted between the battery cell assemblies, and the heat sinks are in contact with the inner wall of the housing, and the heat sinks are used to conduct the heat generated by the battery cells to the housing for heat dissipation.
[0005] In the above technical solution, the heat sink further includes a body and a bent portion connected together; wherein the body is inserted into the battery cell assembly, and the bent portion is bent relative to the body and abuts against the inner wall of the outer casing.
[0006] In any of the above technical solutions, the body is further provided with protrusions and recesses, and the protrusions and recesses are arranged alternately along the height direction of the battery cell. The body can undergo elastic deformation under the pressure of two adjacent battery cells so that the body and the two battery cells fit tightly together.
[0007] In any of the above technical solutions, thermally conductive adhesive is further provided between the bent portion and the inner wall of the outer casing.
[0008] In any of the above technical solutions, the bending portion is further bent toward the side of the battery cell assembly that is not provided with tabs.
[0009] In any of the above technical solutions, the bending portion further includes a side bending portion and a bottom bending portion; wherein the side bending portion abuts against the side wall of the outer casing, and the bottom bending portion abuts against the bottom wall of the outer casing.
[0010] In any of the above technical solutions, the number of the side bending portions is two, and they are respectively arranged on opposite sides of the battery cell along the length direction of the battery cell.
[0011] In any of the above technical solutions, the battery module with the novel cooling structure further includes a flexible member, which is disposed between the cell assembly and the inner wall of the outer casing. The flexible member has an avoidance notch, and the bent portion bends through the avoidance notch on the side of the flexible member near the inner wall of the outer casing.
[0012] In any of the above technical solutions, further, along the first preset direction, a heat sink is provided between any two adjacent battery cells.
[0013] In any of the above technical solutions, further, when each of the heat sinks has a bent portion on its side, and along the first preset direction, the width of the bent portion on the side is greater than half the distance between two adjacent clearance notches on the side, the multiple bent portions on the side bend in the same direction after passing through the corresponding clearance notches.
[0014] When the bottom of any of the heat sinks is formed with the bend, and along the first preset direction, the width of the bend at the bottom is less than half the distance between two adjacent clearance notches at the bottom, any two adjacent bends at the bottom bend in the same direction or towards each other after passing through the corresponding clearance notches.
[0015] In any of the above technical solutions, further, along the height direction of the battery cell, the highest point of the top of the heat sink is lower than the lowest point of the tab cluster at the top of the battery cell.
[0016] In any of the above technical solutions, the heat sink is further made of metal.
[0017] Compared with the prior art, the beneficial effects of this application are as follows:
[0018] This application provides a novel battery module, also known as a lightweight power battery, with a novel cooling structure. Heat sinks are inserted between the cell components to dissipate heat from the cells, ensuring the battery's performance without accelerating battery aging and extending its cycle life. Moreover, the heat sinks occupy little space and do not affect the battery's capacity. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0020] Figure 1 This is a schematic diagram of the structure of a battery module with a novel cooling structure provided in an embodiment of this application;
[0021] Figure 2 This is a schematic diagram of the structure of the heat sink provided in the embodiments of this application;
[0022] Figure 3 This is another structural schematic diagram of the heat sink provided in an embodiment of this application;
[0023] Figure 4 An assembly diagram of the battery cell and heat sink provided in an embodiment of this application;
[0024] Figure 5 This is another assembly drawing of the battery cell and heat sink provided in an embodiment of this application;
[0025] Figure 6 A cross-sectional view of the assembled battery cell and heat sink provided in an embodiment of this application;
[0026] Figure 7 for Figure 6 A partially enlarged structural diagram;
[0027] Figure 8 for Figure 6 Another enlarged schematic diagram of the structure;
[0028] Figure 9 This is another assembly drawing of the battery cell and heat sink provided in an embodiment of this application;
[0029] Figure 10 This is another assembly diagram of the battery cell and heat sink provided in the embodiments of this application.
[0030] Figure label:
[0031] 1-Outer shell, 11-Lower shell, 12-Top cover, 2-Battery cell, 21-Electrical tab, 3-Heat sink, 31-Body, 311-Connecting plate, 312-Protrusion, 313-Recess, 32-Bending part, 321-Side bending part, 322-Bottom bending part, 4-Thermal conductive adhesive, 5-Flexible component, a-First preset direction. Detailed Implementation
[0032] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.
[0033] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.
[0034] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0035] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0037] The following reference Figures 1 to 10 This application describes a battery module with a novel cooling structure according to some embodiments.
[0038] See Figures 1 to 10 As shown, an embodiment of this application provides a battery module with a novel cooling structure, including: a housing 1 and a battery cell 2 and a heat sink 3 disposed within the housing 1; wherein, there are multiple battery cells 2, and the multiple battery cells 2 are stacked sequentially along a first preset direction a to form a battery cell assembly; the heat sink 3 is inserted between the battery cell assemblies, and the heat sink 3 is in contact with the inner wall of the housing 1, and the heat sink 3 is used to conduct the heat generated by the battery cells 2 to the housing 1 for heat dissipation.
[0039] As can be seen from the structure described above, this application provides a novel battery module with a novel cooling structure, namely a lightweight power battery. Heat sinks 3 are inserted between the cell components to dissipate heat from the cell 2, ensuring the working performance of the battery, without accelerating battery aging, extending the cycle life of the battery, and the heat sinks 3 occupy little space and do not affect the battery capacity.
[0040] In this embodiment, preferably, as follows: Figure 2 , Figures 3 to 10 As shown, the heat sink 3 includes a body 31 and a bent portion 32 connected to each other; wherein, the body 31 is inserted into the battery cell assembly, and the bent portion 32 is bent relative to the body 31 and abuts against the inner wall of the outer casing 1.
[0041] As can be seen from the structure described above, the body 31 is attached to the large side of the battery cell 2, which can conduct a large amount of heat generated by the battery cell 2 to the bending part 32, and then conduct the heat to the outer shell 1 through the bending part 32, and finally dissipate the heat from the outer shell 1 to the outside, thereby improving the cooling effect on the battery cell 2.
[0042] Furthermore, preferably, the body 31 is a rectangular plate, and the bent part 32 can also be a rectangular plate. Of course, it is not limited to this and can be selected according to actual needs.
[0043] Furthermore, preferably, the body 31 and the bending portion 32 are an integral structure. Of course, this is not the only option; other options can be selected according to actual needs.
[0044] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the body 31 has a protrusion 312 and a recess 313, and the protrusion 312 and the recess 313 are arranged alternately along the height direction of the battery cell 2. The body 31 can undergo elastic deformation under the pressure of two adjacent battery cells 2 so that the body 31 and the two battery cells 2 are tightly attached.
[0045] As can be seen from the structure described above, the heat sink 3 is provided with a protrusion 312 and a recess 313. When the heat sink 3 is pressed by the battery cells 2 on the left and right sides, the heat sink 3 deforms, making it fit more tightly with the battery cells 2, which helps to improve the heat dissipation effect.
[0046] Further, preferably, the body 31 includes a connecting plate 311 and a protrusion 312 and a recess 313 connected to the connecting plate 311; wherein the connecting plate 311 is disposed around the outer periphery of the protrusion 312 and the recess 313, and connects the protrusion 312 and the recess 313 together, and preferably, the connecting plate 311, the protrusion 312 and the recess 313 are an integral structure.
[0047] It should be noted that the protrusion 312 and the recess 313 may not be provided on the main body 31, depending on the actual needs.
[0048] In this embodiment, preferably, as follows: Figure 8 As shown, thermally conductive adhesive 4 is filled between the bent portion 32 and the inner wall of the outer casing 1. In other words, in this state, the bent portion 32 and the outer casing 1 are in indirect contact.
[0049] As can be seen from the structure described above, the thermally conductive adhesive 4 serves both to fix the bent part 32 to the outer shell 1 and to conduct heat.
[0050] It should be noted that thermally conductive adhesive 4 may not be provided between the bent portion 32 and the outer shell 1. In other words, in this state, the bent portion 32 and the outer shell 1 are in direct contact. The specific choice depends on the actual needs.
[0051] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the bent portion 32 bends toward the side of the cell assembly that does not have the tab 21, which avoids interference with the tab 21 and meets assembly requirements. Of course, it is not limited to this and can be designed according to actual needs.
[0052] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the bending portion 32 includes a side bending portion 321 and a bottom bending portion 322; wherein, the side bending portion 321 abuts against the side wall of the outer shell 1, such as the side wall of the lower shell 11 described below, and the bottom bending portion 322 abuts against the bottom wall of the outer shell 1, such as the bottom wall of the lower shell 11 described below.
[0053] As can be seen from the structure described above, this application designs a side bending portion 321 and a bottom bending portion 322, thereby achieving side heat dissipation and bottom heat dissipation, that is, multi-directional heat dissipation, which helps to improve the heat dissipation effect, thereby ensuring the performance of the battery and improving the battery life. Moreover, no tabs 21 are provided on the side and bottom, so the aforementioned side bending portion 321 and bottom bending portion 322 will not interfere with the tabs 21.
[0054] It should be noted that the situation is not limited to the simultaneous presence of the side bend 321 and the bottom bend 322. Alternatively, only the side bend 321 or only the bottom bend 322 may be provided, depending on the actual needs.
[0055] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, there are two side bending portions 321, which are respectively arranged on opposite sides of the battery cell 2 along the length direction of the battery cell 2.
[0056] As can be seen from the structure described above, side bending portions 321 are provided on both the left and right sides of the battery cell 2 to increase the heat dissipation area and help improve the heat dissipation effect.
[0057] It should be noted that, not limited to the above, a bent portion 32 may also be provided only on one side of the main body 31, depending on the actual needs.
[0058] In this embodiment, preferably, as follows: Figure 9 As shown, the battery module with the novel cooling structure also includes a flexible member 5, which is disposed between the cell assembly and the inner wall of the outer casing 1. The flexible member 5 has an avoidance notch, and the bent portion 32 bends through the avoidance notch on the side of the flexible member 5 near the inner wall of the outer casing 1.
[0059] As can be seen from the structure described above, the flexible component 5 serves to buffer and absorb the expansion of the battery cell 2. An avoidance notch is provided on the flexible component 5 to avoid the bending part 32, so that the bending part 32 can bend after passing through the avoidance notch and avoid interference.
[0060] Furthermore, preferably, the flexible component 5 is foam. Of course, it is not limited to this and can be selected according to actual needs.
[0061] In this embodiment, preferably, as follows: Figure 6 As shown, along the first preset direction a, heat sinks 3 are provided between any two adjacent battery cells 2.
[0062] As can be seen from the structure described above, heat sinks 3 are installed between each pair of adjacent cells 2, which can dissipate heat from each cell 2, and thus achieve uniform heat dissipation for the entire cell assembly.
[0063] It should be noted that: not only along the first preset direction a as mentioned above, heat sinks 3 can be provided between any two adjacent battery cells 2, or a heat sink 3 can be provided every few battery cells 2, or multiple heat sinks 3 can be randomly inserted into the battery cell assembly, with the position selected according to actual needs.
[0064] Furthermore, the number of heat sinks 3 is not limited to multiple; it can also be one, depending on the actual needs.
[0065] In this embodiment, preferably, as follows: Figure 4 and Figure 5As shown, when each heat sink 3 has a bent portion 32, i.e. a side bend 321, on its side, and along the first preset direction a, the width of the bent portion 32, i.e. the side bend 321, is greater than half the distance between two adjacent clearance notches on the side, the multiple bent portions 32, i.e. the multiple side bends 321, bend in the same direction after passing through the corresponding clearance notches, so as to avoid the adjacent bent portions 32 from overlapping and thus affecting heat dissipation.
[0066] In this embodiment, preferably, as follows: Figure 9 As shown, when each heat sink 3 has a bent portion 32 (i.e., a bottom bent portion 322) at its bottom, and along the first preset direction a, the width of the bottom bent portion 32 (i.e., the bottom bent portion 322) is less than half the distance between two adjacent clearance notches at the bottom, any two adjacent bent portions 32 (i.e., any two adjacent bottom bent portions 322) at the bottom bend in the same direction after passing through the corresponding clearance notches.
[0067] As can be seen from the structure described above, since the width of the bottom bend 32, i.e., the bottom bend 322, is less than half the distance between two adjacent clearance gaps along the first preset direction a, any two adjacent bottom bends 32 bend in the same direction and will not overlap. Of course, this is not limited to this; for example... Figure 10 As shown, when each heat sink 3 has a bent portion 32, i.e. a bottom bent portion 322, at its bottom, and along the first preset direction a, the width of the bottom bent portion 32, i.e. a bottom bent portion 322, is less than half the distance between two adjacent clearance notches at the bottom, any two adjacent bent portions 32, i.e. any two adjacent bottom bent portions 322, can be bent towards each other after passing through the corresponding clearance notches, so that adjacent bottom bent portions 322 will not overlap.
[0068] In this embodiment, preferably, as follows: Figure 7 As shown, along the height direction of the cell 2, the highest point of the top of the heat sink 3 is lower than the lowest point of the tab 21 cluster at the top of the cell 2.
[0069] As can be seen from the structure described above, the highest point of the top of the heat sink 3 is lower than the lowest point of the tab 21 cluster at the top of the battery cell 2. This avoids the metal heat sink 3 from being electrically connected to the tab 21, thus preventing a short circuit and making it safer and more reliable.
[0070] In this embodiment, preferably, as follows: Figure 7 As shown, the heat sink 3 is made of metal, which means that the heat sink 3 is a thin metal sheet. Metal has better thermal conductivity and is more suitable as the material for heat sink 3. Of course, it is not limited to this. Other non-metallic heat dissipation materials can also be selected for heat sink 3, depending on the actual needs.
[0071] Furthermore, preferably, the heat sink 3 is made of copper or aluminum, but of course, it is not limited to these.
[0072] In this embodiment, preferably, as follows: Figure 1 As shown, the outer casing 1 includes a lower casing 11 and a top cover 12. The lower casing 11 and the top cover 12 are separate structures, which facilitates the installation of components such as the battery cell 2 inside the lower casing 11. After installation, the top cover 12 can be installed at the top opening of the lower casing 11. The top cover 12 and the lower casing 11 can be connected by bolts, clips or welding. Of course, the structure of the outer casing 1 is not limited to this and can be designed according to actual needs.
[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A battery module with a novel cooling structure, characterized in that, include: The device includes a housing and battery cells and heat sinks disposed within the housing; wherein the number of battery cells is multiple, and the multiple battery cells are stacked sequentially along a first preset direction to form a battery cell assembly; the heat sinks are inserted between the battery cell assemblies, and the heat sinks are in contact with the inner wall of the housing, and the heat sinks are used to conduct the heat generated by the battery cells to the housing for heat dissipation.
2. The battery module with a novel cooling structure according to claim 1, characterized in that, The heat sink includes a connected body and a bent portion; wherein the body is inserted into the battery cell assembly, and the bent portion is bent relative to the body and abuts against the inner wall of the housing.
3. The battery module with a novel cooling structure according to claim 2, characterized in that, The body has protrusions and recesses, which are alternately spaced along the height of the battery cell. The body can elastically deform under the pressure of two adjacent battery cells, allowing the body to fit tightly against the two cells; and / or The space between the bent portion and the inner wall of the outer casing is filled with thermally conductive adhesive; and / or The bent portion bends toward the side of the battery cell assembly that is not provided with tabs.
4. The battery module with a novel cooling structure according to claim 2, characterized in that, The bending portion includes a side bending portion and a bottom bending portion; wherein the side bending portion abuts against the side wall of the outer casing, and the bottom bending portion abuts against the bottom wall of the outer casing.
5. The battery module with a novel cooling structure according to claim 4, characterized in that, The number of side bends is two, and they are respectively arranged on opposite sides of the battery cell along the length direction of the battery cell.
6. The battery module with a novel cooling structure according to claim 3, characterized in that, The battery module with the novel cooling structure also includes a flexible member disposed between the cell assembly and the inner wall of the housing, and the flexible member has an avoidance notch, the bending portion of which bends through the avoidance notch on the side of the flexible member near the inner wall of the housing.
7. The battery module with a novel cooling structure according to claim 6, characterized in that, Along the first preset direction, a heat sink is provided between any two adjacent battery cells.
8. The battery module with a novel cooling structure according to claim 7, characterized in that, When each of the heat sinks has a bend on its side, and the width of the bend on the side is greater than half the distance between two adjacent clearance notches on the side along the first preset direction, the multiple bends on the side bend in the same direction after passing through the corresponding clearance notches. When the bottom of any of the heat sinks is formed with the bend, and along the first preset direction, the width of the bend at the bottom is less than half the distance between two adjacent clearance notches at the bottom, any two adjacent bends at the bottom bend in the same direction or towards each other after passing through the corresponding clearance notches.
9. The battery module with a novel cooling structure according to claim 1, characterized in that, Along the height direction of the battery cell, the highest point of the top of the heat sink is lower than the lowest point of the top tab of the battery cell.
10. The battery module with a novel cooling structure according to any one of claims 1 to 9, characterized in that, The heat sink is made of metal.