Battery module, battery pack and vehicle

Abstract

The utility model discloses a battery module, a battery pack and a vehicle, the battery module comprises a first battery cell group, a second battery cell group and a heating film assembly, and the first battery cell group and the second battery cell group are arranged in parallel at intervals in a first direction; the heating film assembly is arranged between the first battery cell group and the second battery cell group, the surfaces of the two sides of the heating film assembly are attached to the first battery cell group and the second battery cell group respectively, and the heating film assembly is suitable for heating the first battery cell group and the second battery cell group. According to the battery module disclosed by the utility model, the heating film assembly is arranged between the first battery cell group and the second battery cell group and can generate heat to heat the first battery cell group and the second battery cell group at the same time, so that the heating efficiency of the battery module is improved, the service life of the battery cells can be prolonged, and the performance of the battery cells can be maintained; and the temperature difference in the battery module can be reduced.

Description

Technical Field

[0001] The utility model relates to the field of batteries, and in particular to a battery module, a battery pack and a vehicle. Background Art

[0002] Battery thermal management is a new technology that is based on the impact of temperature on battery performance, combined with the battery's electrochemical characteristics and heat generation mechanism. It is established through reasonable design on the basis of multiple disciplines and fields such as materials science, electrochemistry, heat transfer, and molecular dynamics. It aims to solve the problem of thermal dissipation or thermal runaway caused by batteries operating at too high or too low temperatures, so as to improve the overall performance of batteries.

[0003] Battery module design primarily focuses on improving energy density, safety, and lifespan. However, thermal management between multiple battery cells remains challenging. High heat loss between cells reduces the battery module's overall range. Heating films can be incorporated into the battery module to heat the cells, but this increases the module's size and weight. Furthermore, uneven heating can lead to uneven temperatures within the module, impacting its performance. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a battery module. According to the battery module of the present invention, a heating film assembly is provided between a first battery cell group and a second battery cell group. The heating film assembly can generate heat to heat the first and second battery cell groups simultaneously, thereby improving the heating efficiency of the battery module, extending the service life of the battery cells, maintaining battery cell performance, and reducing temperature differences within the battery module.

[0005] The utility model also provides a battery pack having the battery module.

[0006] The utility model also provides a vehicle with the battery pack.

[0007] According to the utility model, the battery module includes: a first battery cell group and a second battery cell group, the first battery cell group and the second battery cell group are spaced apart and arranged side by side in a first direction; a heating film assembly, the heating film assembly is arranged between the first battery cell group and the second battery cell group, and the two side surfaces of the heating film assembly are respectively attached to the first battery cell group and the second battery cell group, and the heating film assembly is suitable for heating the first battery cell group and the second battery cell group.

[0008] According to the battery module of the present invention, the first cell group and the second cell group are respectively a row of cells in the battery module. By spacing the first cell group and the second cell group in a first direction and arranging them side by side, the spacing between the first cell group and the second cell group can enable the first cell group and the second cell group to have relatively independent spaces when heated, thereby alleviating the degree of heat accumulation and temperature unevenness, and reducing the temperature difference inside the battery module. By arranging a heating film assembly between the first cell group and the second cell group, the two side surfaces of the heating film assembly are respectively arranged to fit the first cell group and the second cell group, and the heating film assembly can generate heat to heat the first cell group and the second cell group at the same time, thereby improving the heating efficiency of the battery module, reasonably controlling the temperature of the battery module, and extending the service life of the cell and maintaining the cell performance. One heating film assembly can heat two rows of cells in the battery module, which is beneficial to reducing the number of heating film assemblies in the battery module to optimize the space utilization inside the battery module, and can optimize the size, weight and reliability of the battery module.

[0009] According to some embodiments of the present invention, the battery module includes end plates, which are arranged at both ends of the first battery cell group and the second battery cell group, and the two ends of the heating film assembly are respectively connected to the end plates to be fastened between the first battery cell group and the second battery cell group.

[0010] According to some embodiments of the present invention, the end plate includes a first end plate and a second end plate, the first end plate is arranged at both ends of the first battery cell group, and the second end plate is arranged at both ends of the second battery cell group; the two ends of the heating film assembly are respectively connected to the two first end plates and / or the two ends of the heating film are respectively connected to the two second end plates.

[0011] According to some embodiments of the present invention, the heating film assembly includes: a first heating plate, which is fitted with the first battery cell group and suitable for heating the first battery cell group; a second heating plate, which is fitted with the second battery cell group and suitable for heating the second battery cell group; and a thermal insulation member, which is arranged between the first heating plate and the second heating plate.

[0012] According to some embodiments of the present invention, rivet holes are respectively provided on the sides of the first end plate and the second end plate close to each other; the battery module includes: rivets, which are constructed in multiple numbers, and each rivet rivets the first heating plate to the rivet hole of the first end plate or rivets the second heating plate to the rivet hole of the second end plate.

[0013] According to some embodiments of the present invention, first electrical connectors are respectively provided at both ends of the first heating plate, and second electrical connectors are respectively provided at both ends of the second heating plate, and the first electrical connector and the second electrical connector extend away from each other in a first direction.

[0014] According to some embodiments of the present invention, the first battery cell group includes a plurality of first battery cells arranged in the second direction, and a first gap is formed between two adjacent first battery cells; the second battery cell group includes a plurality of second battery cells arranged in the second direction, and a second gap is formed between two adjacent second battery cells; an avoidance hole is formed on the heating film assembly and passes through in the first direction, and one end of the avoidance hole is opposite to the first gap, and the other end of the avoidance hole is opposite to the second gap.

[0015] According to some embodiments of the present invention, the battery module includes: an adhesive layer, which is arranged between the first heating plate and the first battery cell group and / or between the second heating plate and the second battery cell group.

[0016] The battery pack according to the present invention is briefly described below.

[0017] The battery pack according to the present invention includes the battery module described in any one of the above embodiments. Since the battery pack according to the present invention includes the battery module described in any one of the above embodiments, the battery pack according to the present invention can uniformly heat the battery cells, and the battery pack has good performance and reliability.

[0018] The vehicle according to the present invention is briefly described below.

[0019] The battery pack according to any one of the above embodiments of the vehicle of the present invention. Since the vehicle according to the present invention includes the battery pack according to any one of the above embodiments, the vehicle according to the present invention can provide a more stable energy output due to the good performance of the battery pack, thereby improving the vehicle's cruising range and power performance.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a schematic diagram of a battery module according to one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the connection between the heating film assembly and the end plate according to one embodiment of the utility model;

[0024] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0025] Figure 4 Schematic diagram of a heating film assembly according to an embodiment of the present invention.

[0026] Reference numerals:

[0027] Battery module 1;

[0028] First battery cell group 11, first battery cell 111;

[0029] Second battery cell group 12, second battery cell 121;

[0030] Heating film assembly 13, first heating plate 131, first electrical connector 1311, second heating plate 132, second electrical connector 1321, thermal insulation member 133, avoidance hole 134;

[0031] End plate 14, first end plate 141, second end plate 142;

[0032] Rivet 15. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] In related technologies, the heat loss between battery cells is large, resulting in a reduction in the battery life of the entire battery module. The battery cells can be heated by setting a heating film in the battery module, but this will increase the size and weight of the battery module, and uneven heating will make the temperature in the battery module uneven, affecting the performance of the battery module.

[0035] Reference below Figures 1-4 A battery module 1 according to an embodiment of the present invention is described.

[0036] like Figure 1As shown, the battery module 1 according to the present invention includes a first battery cell group 11, a second battery cell group 12 and a heating film assembly 13. The first battery cell group 11 and the second battery cell group 12 are spaced apart and arranged side by side in a first direction; the heating film assembly 13 is arranged between the first battery cell group 11 and the second battery cell group 12, and the two side surfaces of the heating film assembly 13 are respectively attached to the first battery cell group 11 and the second battery cell group 12. The heating film assembly 13 is suitable for heating the first battery cell group 11 and the second battery cell group 12.

[0037] In the battery module 1 of the present application, the first cell group 11 and the second cell group 12 are respectively a row of cells in the battery module 1. By spacing the first cell group 11 and the second cell group 12 in the first direction and arranging them side by side, the spacing between the first cell group 11 and the second cell group 12 can provide the first cell group 11 and the second cell group 12 with relatively independent spaces when heated, thereby alleviating the degree of heat accumulation and temperature unevenness, and reducing the temperature difference inside the battery module 1. By arranging a heating film assembly 13 between the first cell group 11 and the second cell group 12, the two side surfaces of the heating film assembly 13 are respectively arranged to fit the first cell group 11 and the second cell group 12, and the heating film assembly 13 can generate heat to heat the first cell group 11 and the second cell group 12 at the same time, thereby improving the heating efficiency of the battery module 1 and rationally controlling the temperature of the battery module 1, thereby extending the service life of the cell and maintaining the cell performance. One heating film assembly 13 can heat two rows of battery cells in the battery module 1, which helps to reduce the number of heating film assemblies 13 in the battery module 1 to optimize the space utilization inside the battery module 1, and can optimize the size, weight and reliability of the battery module 1.

[0038] Therefore, the battery module 1 of the present application, by setting a heating film assembly 13 between the first battery cell group 11 and the second battery cell group 12, the heating film assembly 13 can generate heat to heat the first battery cell group 11 and the second battery cell group 12 at the same time, thereby improving the heating efficiency of the battery module 1, extending the service life of the battery cell and maintaining the battery cell performance, and reducing the temperature difference inside the battery module 1.

[0039] According to some embodiments of the present invention, Figure 2As shown, the battery module 1 includes an end plate 14, which is provided at both ends of the first cell group 11 and the second cell group 12. Both ends of the heating film assembly 13 are respectively connected to the end plates 14 to be fastened between the first cell group 11 and the second cell group 12. At the common end of the first cell group 11 and the second cell group 12, the end plate 14 may be one that is simultaneously connected to the end of the first cell group 11 and the end of the second cell group 12, or two end plates 14 may be respectively connected to the end of the first cell group 11 and the end of the second cell group 12. By providing the end plates 14 at both ends of the first cell group 11 and the second cell group 12, the end plates 14 can play a role in fixing the first cell group 11 and the second cell group 12, making the battery module 1 more structurally stable, improving the structural strength of the battery module 1, and thereby improving the impact and vibration resistance of the battery module 1. By connecting the heating film assembly 13 to the end plate 14, the heating film assembly 13 can be stably fixed between the first battery cell group 11 and the second battery cell group 12. The heating film assembly 13 is difficult to move relative to the first battery cell group 11 and the second battery cell group 12, which can improve the reliability of the heating film assembly 13 heating the first battery cell group 11 and the second battery cell group 12 and reduce the risk of dry burning caused by the misalignment of the heating film assembly 13 relative to the first battery cell group 11 and the second battery cell group 12.

[0040] According to some embodiments of the present invention, Figure 1-Figure 3 As shown, the end plate 14 includes a first end plate 141 and a second end plate 142. The first end plate 141 is provided at both ends of the first cell group 11, and the second end plate 142 is provided at both ends of the second cell group 12. The two ends of the heating film assembly 13 are respectively connected to the two first end plates 141 and / or the two ends of the heating film assembly 13 are respectively connected to the two second end plates 142. At the common end of the first cell group 11 and the second cell group 12, the end plate 14 is connected to the end of the first cell group 11 and the end of the second cell group 12, respectively. The first end plate 141 is provided at the end of the first cell group 11, and the second end plate 142 is provided at the end of the second cell group 12. This can reduce the size and weight of the end plate 14, facilitating the assembly of the battery module 1. By providing a first end plate 141 and a second end plate 142, the first end plate 141 provides support and protection for the first cell group 11, and the second end plate 142 provides support and protection for the second cell group 12, which helps to disperse shock and vibration and improve the shock and vibration resistance of the battery module 1. The ends of the heating film assembly 13 can be connected to both the first end plate 141 and the second end plate 142. The end plate 14 of the heating film assembly 13 can also be connected to one of the first end plate 141 and the second end plate 142, so that the heating film assembly 13 is fastened between the first cell group 11 and the second cell group 12. The heating film assembly 13 can stably and reliably heat the first cell group 11 and the second cell group 12.

[0041] According to some embodiments of the present invention, Figure 4 As shown, the heating film assembly 13 includes a first heating plate 131, a second heating plate 132, and a thermal insulation member 133. The first heating plate 131 is positioned in contact with the first battery cell group 11 and is suitable for heating the first battery cell group 11; the second heating plate 132 is positioned in contact with the second battery cell group 12 and is suitable for heating the second battery cell group 12; and the thermal insulation member 133 is positioned between the first heating plate 131 and the second heating plate 132. The first heating plate 131 can heat the first battery cell group 11, and the second heating plate 132 can heat the second battery cell group 12. The thermal insulation member 133 is positioned between the first heating plate 131 and the second heating plate 132, providing insulation and heat preservation, thereby reducing heat transfer between the first and second battery cell groups 11, 12. Heat within the battery module 1 is dissipated more slowly to the outside world, thereby maintaining the battery cells within the battery module 1 at a suitable temperature for a long time, and achieving more stable battery performance. Exemplarily, the thermal insulation member 133 is constructed as thermal insulation foam.

[0042] According to some embodiments of the present invention, Figure 3 As shown, rivet holes are respectively provided on the sides of the first end plate 141 and the second end plate 142 close to each other; the battery module 1 includes a rivet 15, which is constructed in multiple numbers, and each rivet 15 rivets the first heating plate 131 to the rivet hole of the first end plate 141 or rivets the second heating plate 132 to the rivet hole of the second end plate 142. By respectively providing rivet holes on the side surfaces of the first end plate 141 and the second end plate 142 close to each other, when the battery module 1 is assembled, the rivets 15 can pass through the corresponding rivet holes to rivet the first heating plate 131 to the first end plate 141 or the second heating plate 132 to the second end plate 142 together. The first heating plate 131 can be kept in contact with the first battery cell group 11, and the heat generated by the first heating plate 131 can be effectively transferred to the first battery cell group 11. The second heating plate 132 can be kept in contact with the second battery cell group 12, and the heat generated by the second heating plate 132 can be effectively transferred to the second battery cell group 12, thereby improving the stability and reliability of the battery module 1.

[0043] According to some embodiments of the present invention, Figure 4As shown, first electrical connectors 1311 are provided at both ends of the first heating plate 131, and second electrical connectors 1321 are provided at both ends of the second heating plate 132. The first electrical connectors 1311 and the second electrical connectors 1321 extend away from each other in a first direction. By providing the first electrical connectors 1311 at both ends of the first heating plate 131, the first heating plate 131 can establish an electrical connection with an external power source, and current flows from one first electrical connector 1311 to the other first electrical connector 1311, thereby achieving current transmission and control of the heating function. Similarly, by providing the second electrical connectors 1321 at both ends of the second heating plate 132, the second heating plate 132 can also establish an electrical connection with an external power source, and current flows from one second electrical connector 1321 to the other second electrical connector 1321, thereby achieving current transmission and control of the heating function. By constructing the first electrical connector 1311 and the second electrical connector 1321 to extend away from each other in a first direction, the mutual interference between the first electrical connector 1311 and the second electrical connector 1321 is reduced, and current cross interference is less likely to occur. The wires are also less likely to be misconnected when connecting the first electrical connector 1311 or the second electrical connector 1321, thereby improving safety and stability.

[0044] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the first cell group 11 includes a plurality of first cells 111 arranged in the second direction, with a first gap formed between adjacent first cells 111. The second cell group 12 includes a plurality of second cells 121 arranged in the second direction, with a second gap formed between adjacent second cells 121. The heating film assembly 13 is formed with a relief hole 134 extending in the first direction, with one end of the relief hole 134 facing the first gap, and the other end of the relief hole 134 facing the second gap. By providing a first gap between adjacent first cells 111 and a second gap between adjacent second cells 121, the first and second gaps can alleviate pressure caused by thermal expansion and mechanical deformation, reduce the risk of mutual compression and damage between the cells, and extend the service life of the battery module 1. By setting an avoidance hole 134 that penetrates in the first direction on the heating film assembly 13, one end of the avoidance hole 134 is opposite to the first gap, and the other end of the avoidance hole 134 is opposite to the second gap, the heating film assembly 13 will not generate heat at the avoidance hole 134. The heat generated by the heating film assembly 13 can be fully transferred to the first battery cell group 11 and the second battery cell group 12, which can reduce the risk of local overheating and improve the quality and reliability of the battery module 1.

[0045] According to some embodiments of the present invention, the battery module 1 includes an adhesive layer disposed between the first heating plate 131 and the first battery cell group 11 and / or between the second heating plate 132 and the second battery cell group 12. The adhesive layer may be disposed only between the first heating plate 131 and the first battery cell group 11; only between the second heating plate 132 and the second battery cell group 12; or both. Providing an adhesive layer between the first heating plate 131 and the first battery cell group 11 and / or between the second heating plate 132 and the second battery cell group 12 enhances the stability and reliability of the battery module 1. The adhesive layer tightly secures the heating plates and the battery cell groups together, making separation between the first heating plate 131 and the first battery cell group 11 and / or between the second heating plate 132 and the second battery cell group 12 difficult. The adhesive layer can also effectively transfer heat to the first battery cell group 11 and / or the second battery cell group 12 , thereby improving the efficiency of heat transfer and enhancing the stability and reliability of the battery module 1 .

[0046] The battery pack according to the present invention is briefly described below.

[0047] The battery pack according to the present invention includes the battery module 1 described in any one of the above embodiments. Since the battery pack according to the present invention includes the battery module 1 described in any one of the above embodiments, the battery pack according to the present invention can uniformly heat the battery cells, and the battery pack has good performance and reliability.

[0048] The vehicle according to the present invention is briefly described below.

[0049] The battery pack according to any one of the above embodiments of the vehicle of the present invention. Since the vehicle according to the present invention includes the battery pack according to any one of the above embodiments, the vehicle according to the present invention can provide a more stable energy output due to the good performance of the battery pack, thereby improving the vehicle's cruising range and power performance.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0051] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0052] In the description of the present invention, “plurality” means two or more.

[0053] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0054] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0055] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A battery module, characterized in that: include: A first battery cell group and a second battery cell group, wherein the first battery cell group and the second battery cell group are spaced apart and arranged in parallel in a first direction; A heating film assembly is arranged between the first battery cell group and the second battery cell group. The two side surfaces of the heating film assembly are respectively arranged to fit the first battery cell group and the second battery cell group. The heating film assembly is suitable for heating the first battery cell group and the second battery cell group.

2. The battery module according to claim 1, characterized in that: include: End plates are arranged at both ends of the first battery cell group and both ends of the second battery cell group, and both ends of the heating film assembly are respectively connected to the end plates to be fastened between the first battery cell group and the second battery cell group.

3. The battery module according to claim 2, characterized in that: The end plate includes a first end plate and a second end plate, the first end plate is arranged at two ends of the first battery cell group, and the second end plate is arranged at two ends of the second battery cell group; Two ends of the heating film assembly are respectively connected to the two first end plates and / or two ends of the heating film assembly are respectively connected to the two second end plates.

4. The battery module according to claim 3, characterized in that: The heating film assembly comprises: A first heating plate, the first heating plate is disposed in close contact with the first battery cell group and is suitable for heating the first battery cell group; A second heating plate, the second heating plate is disposed in close contact with the second battery cell group and is suitable for heating the second battery cell group; A heat insulating member is disposed between the first heating plate and the second heating plate.

5. The battery module according to claim 4, characterized in that: The first end plate and the second end plate are respectively provided with riveting holes on their sides close to each other; The battery module includes: a rivet, wherein the rivet is configured in a plurality, and each rivet rivets the first heating plate to the rivet hole of the first end plate or rivets the second heating plate to the rivet hole of the second end plate.

6. The battery module according to claim 4, characterized in that: Two ends of the first heating plate are respectively provided with first electrical connectors, and two ends of the second heating plate are respectively provided with second electrical connectors. The first electrical connector and the second electrical connector extend away from each other in a first direction.

7. The battery module according to claim 1, characterized in that: The first battery cell group includes a plurality of first battery cells arranged in a second direction, and a first gap is formed between two adjacent first battery cells; the second battery cell group includes a plurality of second battery cells arranged in the second direction, and a second gap is formed between two adjacent second battery cells; The heating film assembly is formed with an avoidance hole which penetrates in a first direction, one end of the avoidance hole is directly opposite to the first slit, and the other end of the avoidance hole is directly opposite to the second slit.

8. The battery module according to claim 4, characterized in that: include: An adhesive layer, wherein the adhesive layer is disposed between the first heating plate and the first battery core group and / or between the second heating plate and the second battery core group.

9. A battery pack, characterized in that: A battery module comprising any one of claims 1 to 8.

10. A vehicle, characterized in that: A battery pack comprising the battery pack of claim 9.

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