Battery pack
By using a combination of heating film, thermal conductive adhesive, and thermal conductive pad in the battery pack, the problem of poor charge and discharge performance of the battery pack under low temperature conditions is solved, enabling the battery pack to be used efficiently and operate safely in cold regions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU PYLON BATTERY CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-06-12
Smart Images
Figure CN224355303U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a battery pack. Background Technology
[0002] A power battery is an energy storage device used to power electric vehicles and other equipment. It consists of one or more battery packs and a battery management (control) system. As a new energy source, it is receiving increasing attention. However, current battery packs are subject to certain limitations in use. For example, their charge and discharge performance is relatively poor at low temperatures, which severely restricts their practical application in cold regions or winter conditions. Utility Model Content
[0003] The purpose of this application is to provide a battery pack that, to a certain extent, solves the technical problem that existing batteries face significant challenges in charging performance under low-temperature conditions, which severely limits their practical application in cold regions or winter conditions.
[0004] This application provides a battery pack, including: a battery cell module, a heating film, and a thermally conductive adhesive; wherein, the heating film is disposed on at least one side of the battery cell module, and the heating film is bonded to the battery cell module by the thermally conductive adhesive.
[0005] In the above technical solution, the battery cell module further includes multiple battery cells, and the multiple battery cells are stacked together sequentially along a first preset direction.
[0006] In any of the above technical solutions, a thermal pad is further provided between any two adjacent battery cells, and the thermal pad is in contact with the thermal adhesive.
[0007] In any of the above technical solutions, the battery pack further includes a housing, and the battery cell module and the heating film are both disposed inside the housing.
[0008] In any of the above technical solutions, the inner wall of the outer shell is further provided with a heat insulation layer.
[0009] In any of the above technical solutions, further, along the height direction of the battery cell, the outer edge of the projection of the heating film extends beyond the outer edge of the projection of the battery cell module; a thermally conductive structural adhesive is filled between the battery cell module and the outer shell, and along a direction perpendicular to the height direction of the battery cell, the thermally conductive structural adhesive on the side of the battery cell contacts the structure of the heating film that extends beyond the battery cell module.
[0010] In any of the above technical solutions, the battery pack further includes an electrical isolation plate and a heat insulation plate; wherein the electrical isolation plate is disposed on the side of the heating film away from the cell module, and the heat insulation plate is disposed between the two.
[0011] In any of the above technical solutions, the outer shell further includes a first shell and a second shell; wherein the battery cell module, the heating film and the electrical isolation plate are all disposed in the first shell, and along the height direction of the first shell, the electrical isolation plate, the heating film and the battery cell module are arranged sequentially from top to bottom; the second shell is fastened to the top opening end of the first shell, and the two are detachably connected by a first fastening member.
[0012] In any of the above technical solutions, the electrical isolation plate further includes a main board body and a flanged portion connected to each other; wherein, the main board body is used to install electrical components, the flanged portion abuts against the inner sidewall of the first housing and is detachably connected to the first housing through a second fastening member; the second fastening member and a portion of the first fastening member are the same component.
[0013] In any of the above technical solutions, the sidewall of the first housing extending along the height direction of the battery cell includes a main body, an inclined portion, and a mating portion connected in sequence, such that the mating portion is disposed relative to the main body and closer to the battery cell module side; along the direction perpendicular to the height direction of the battery cell, the inner sidewall of the first housing abuts against the outer side of the mating portion, and along the height direction of the battery cell, the bottom of the sidewall of the first housing abuts against the outer side of the inclined portion.
[0014] In any of the above technical solutions, the heat insulation plate is further bonded to the side of the electrical isolation plate near the heating film.
[0015] In any of the above technical solutions, the heating film is further described as an electric heating film.
[0016] Compared with the prior art, the beneficial effects of this application are as follows:
[0017] The battery pack provided in this application, through the reasonable arrangement of heating film, thermal conductive adhesive and thermal conductive pad, allows the heating film to directly heat the surface of the cell module through the thermal conductive adhesive, while the thermal conductive pad transfers heat to the interior of adjacent cell modules, ensuring that the entire cell module heats up quickly in low-temperature environments, thereby improving the charging and discharging efficiency and lifespan of the battery. In other words, the thermal conductive adhesive and thermal conductive pad enable heat to be transferred from the heating film to the outside and inside of the cell module. This design optimizes the heating path of the cell module, thereby improving the low-temperature performance of the battery pack.
[0018] Furthermore, the battery cell module and electrical components are effectively isolated by an electrical isolation plate, and a heat insulation plate is installed between the electrical isolation plate and the heating film. This completely blocks the heat transfer path between the battery cell module and the electrical components, improving thermal management efficiency and system safety. In the event of battery cell module failure or thermal runaway, the heat insulation plate can effectively prevent heat transfer to the electrical components, avoiding failure of the electrical components due to high temperature, thereby reducing the risk of system failure. Moreover, the heat insulation plate can also ensure that the heat generated by the heating film is preferentially transferred to the battery cell module, reducing heat loss to other components, thereby improving heating efficiency and temperature regulation accuracy.
[0019] In addition, the electrical components are fixed to the electrical isolation plate, and the electrical isolation plate can be reliably fixed to the first housing, such as the lower box, by screws or bolts, which makes the installation and maintenance of the electrical components more convenient. The separate design of the electrical components and the battery module not only simplifies the assembly process, but also enables the quick disassembly and replacement of electrical components during daily maintenance or troubleshooting, thereby improving maintenance efficiency. Attached Figure Description
[0020] 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.
[0021] Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of this application;
[0022] Figure 2 An assembly diagram of the battery pack provided in the embodiments of this application;
[0023] Figure 3 A partial exploded view of the battery pack provided in an embodiment of this application;
[0024] Figure 4 This is a schematic diagram of the structure of the electrical isolation board provided in the embodiments of this application;
[0025] Figure 5 This is a partial assembly diagram of the battery pack provided in an embodiment of this application;
[0026] Figure 6 A cross-sectional view of the battery pack provided in an embodiment of this application;
[0027] Figure 7 for Figure 6 A magnified structural diagram at point A;
[0028] Figure 8An assembly diagram of the battery cell and thermal pad provided in an embodiment of this application;
[0029] Figure 9 An exploded view of the first outer shell and insulation layer provided for an embodiment of this application.
[0030] Figure label:
[0031] 1-Battery cell module, 101-Battery cell, 102-Thermal conductive pad, 2-Heating film, 3-First thermal conductive adhesive, 4-Second thermal conductive adhesive, 5-Third thermal conductive adhesive, 6-Outer shell, 61-First shell, 62-Second shell, 621-Main body, 622-Inclined part, 623-Matching part, 7-Insulation layer, 8-Electrical isolation plate, 81-Main body, 82-Flanged part, 9-Heat insulation plate, 10-First fastening component, 11-Second fastening component, 12-Electrical component. 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 9 This application describes a battery pack according to some embodiments.
[0038] See Figure 1 , Figure 2 , Figure 6 and Figure 7 As shown, an embodiment of this application provides a battery pack, including: a battery cell module 1, a heating film 2, and thermally conductive adhesive; wherein, at least one side of the battery cell module 1 is provided with the heating film 2, and the heating film 2 is bonded to the battery cell module 1 by the thermally conductive adhesive. It should be noted that: the aforementioned side of the battery cell module 1 may refer to the top, bottom, or side wall of the battery cell module 1, etc., which can be selected according to actual needs. In addition, it should be noted that: in order to distinguish the thermally conductive adhesive in other locations, the thermally conductive adhesive between the heating film 2 and the battery cell module 1 is named the first thermally conductive adhesive 3.
[0039] As described above, this application provides a battery pack in which a heating film 2 is added and bonded to the cell module 1 using thermally conductive adhesive. This allows heat to be transferred from the heating film 2 to the outside and inside of the cell module 1 via the thermally conductive adhesive, ensuring that the entire battery can heat up quickly in low-temperature environments. This improves the battery's charging and discharging efficiency and lifespan, thus enhancing the low-temperature performance of the battery pack. Furthermore, the heating film 2 is an independent module, facilitating quick installation and replacement, reducing maintenance costs and complexity. In addition, the heating film 2 can be easily attached to the surface of the cell module 1 using adhesive, without the need for complex fixing processes. This simple operation saves time and effort, and the high degree of adhesion with the cell 101 avoids the risk of dry burning. Moreover, the heating film 2 occupies less space and does not affect the overall design and layout. The heating film 2 can also be zoned with different heating power settings, enabling precise temperature control of different areas of the battery pack and preventing localized overheating or uneven temperature distribution.
[0040] Furthermore, preferably, the heating film 2 is an electric heating film 2, which can be heated by electricity and has adjustable power, making it more adaptable. Of course, the type of heating film 2 is not limited to this.
[0041] In this embodiment, preferably, as follows: Figures 1 to 3As shown, the battery module 1 includes a plurality of battery cells 101, and the plurality of battery cells 101 are stacked together sequentially along a first preset direction a.
[0042] Further, preferably, such as Figure 7 and Figure 8 As shown, a thermal pad 102 is provided between any two adjacent battery cells 101, and the thermal pad 102 is in contact with the thermal adhesive.
[0043] As can be seen from the structure described above, the heating film 2 directly heats the surface of the cell module 1 through the thermally conductive adhesive, while the thermally conductive pad 102 transfers heat to the interior of the cell module 1, ensuring that the entire battery pack heats up quickly in a low-temperature environment, thereby improving the charging and discharging efficiency and service life of the battery.
[0044] Furthermore, preferably, the first preset direction a is the thickness direction of the battery cell 101. Of course, it is not limited to this and can be selected according to actual needs.
[0045] In this embodiment, preferably, as follows: Figure 1 and Figure 2 As shown, the battery pack also includes a housing 6, and the cell module 1 and the heating film 2 are both disposed inside the housing 6, which serves to protect the cell module 1 and other components.
[0046] In this embodiment, preferably, as follows: Figure 9 As shown, the inner wall of the outer shell 6 is provided with a heat insulation layer 7.
[0047] As can be seen from the structure described above, the insulation layer 7 is attached to the inner wall of the outer shell 6, which helps to reduce the temperature difference caused by heat diffusion.
[0048] Furthermore, preferably, the insulation layer 7 is made of insulating foam. Of course, it is not limited to this and can be selected according to actual needs.
[0049] In this embodiment, preferably, as follows: Figure 6 and Figure 7 As shown, along the height direction of the cell 101, the outer edge of the projection of the heating film 2 extends beyond the outer edge of the projection of the cell module 1; the cell module 1 and the outer shell 6 are filled with thermally conductive structural adhesive (the thermally conductive adhesive at this location is named the second thermally conductive adhesive 4), and along the direction perpendicular to the height direction of the cell 101, the thermally conductive structural adhesive on the side of the cell 101 contacts the structure of the heating film 2 that extends beyond the cell module 1.
[0050] As can be seen from the structure described above, thermally conductive adhesive layers are provided on all four sides of the battery cell module 1, thereby connecting the battery cell module 1 and the outer shell 6 together, thus fixing the battery cell module 1, and also conducting the heat of the heating film 2 to the four sides of the battery cell module 1, ensuring that the battery cell module 1 can work efficiently in low-temperature environments.
[0051] Further, preferably, such as Figure 6 As shown, in order to further fix the battery cell module 1, thermally conductive adhesive, i.e., a thermally conductive adhesive layer, can also be provided between the bottom of the battery cell module 1 and the corresponding bottom wall of the outer casing 6 (the thermally conductive adhesive at this location is named the third thermally conductive adhesive 5), thereby further fixing the battery cell module 1.
[0052] It should be noted that the thermally conductive adhesive between the side of the battery cell module 1 and the side of the outer shell 6, and the thermally conductive adhesive between the bottom of the battery cell module 1 and the bottom of the outer shell 6 can be filled by potting, but it is not limited to this.
[0053] In addition, it should be noted that: in this embodiment, the heating film 2 is only provided on the top of the cell module 1. It is not limited to this. The heating film 2 can also be provided on the side wall or bottom wall of the cell module 1. The specific choice depends on the actual needs. In other words, the number and position of the heating film 2 can be selected according to the actual needs.
[0054] In this embodiment, preferably, as follows: Figure 1 , Figures 3 to 5 As shown, the battery pack also includes an electrical isolation plate 8 and a heat insulation plate 9; wherein, the electrical isolation plate 8 is disposed on the side of the heating film 2 away from the cell module 1, and the heat insulation plate 9 is disposed between the two, and preferably, the heat insulation plate 9 is bonded to the side of the electrical isolation plate 8 near the heating film 2, which has a solid structure and is simple and convenient to operate. Of course, it is not limited to this, the heat insulation plate 9 can also be fixed on the outer shell 6.
[0055] As can be seen from the structure described above, the battery cell module 1 and the electrical component 12 are effectively isolated by the electrical isolation plate 8. Specifically, the electrical component 12 is fixedly installed on the electrical isolation plate 8, and the isolation plate can be reliably fixed to the first housing 61, i.e., the lower housing, by the first fastening member 10 described below, such as screws or bolts. In order to ensure the safety of the system, a heat insulation plate 9 can be attached to the lower part of the electrical isolation plate 8. The heat insulation plate 9 can not only effectively isolate the heat transfer between the battery cell module 1 and the electrical component 12, but also prevent the electrical component 12 from being damaged due to thermal runaway caused by the failure of the battery cell 101.
[0056] In this embodiment, preferably, as follows: Figures 3 to 5As shown, the outer casing 6 includes a first casing 61 and a second casing 62; wherein, the battery cell module 1, the heating film 2 and the electrical isolation plate 8 are all disposed inside the first casing 61, and along the height direction of the first casing 61, the electrical isolation plate 8, the heating film 2 and the battery cell module 1 are arranged sequentially from top to bottom; the second casing 62 is fastened to the top opening end of the first casing 61, and the two are detachably connected by a first fastening member 10, such as a screw or bolt.
[0057] As can be seen from the structure described above, the electrical isolation plate 8 and the heating film 2 are integrated on the top of the battery cell module 1, which facilitates the disassembly and replacement of the electrical components 12 on the electrical isolation plate 8. Similarly, the heating film 2 is placed on the top of the battery cell module 1, which also facilitates the maintenance of the heating film 2.
[0058] In addition, the first housing 61 and the second housing 62 are detachably connected by a first fastening member 10, such as screws or bolts, which facilitates installation and disassembly, and thus facilitates maintenance of components such as the top electrical isolation plate 8 and the heating film 2.
[0059] It should be noted that the electrical isolation plate 8 and the heating film 2 are not limited to being set on the top of the battery cell module 1, but can also be set on the four sides or the bottom of the battery cell module 1, etc., depending on the actual needs. In addition, the electrical isolation plate 8 and the heating film 2 can be set on different sides, depending on the actual needs.
[0060] Furthermore, preferably, the aforementioned first outer shell 6 is a hollow structure with an open top, and preferably, it has a bottom wall and four side walls to form a square shell; the second outer shell 6 is a hollow structure with an open bottom, and preferably, it has a top wall and four side walls to form a square shell, and preferably, the depth of the first outer shell 6 is much greater than the depth of the second outer shell 6, so that the battery cell module 1, heating film 2, and electrical isolation plate 8 can be installed inside the first outer shell 6, and the second outer shell 6 mainly serves to seal the top opening of the first outer shell 6. Of course, it is not limited to this, and can be designed according to actual needs.
[0061] It should be noted that, not limited to the above, the heating film 2 and the electrical isolation plate 8 can also be placed in other positions of the battery cell module 1, depending on the actual needs.
[0062] In this embodiment, preferably, as follows: Figures 3 to 5As shown, the electrical isolation plate 8 includes a main body 81 and a flanged portion 82 connected to each other; wherein, the main body 81 is used to install electrical components 12, and the flanged portion 82 abuts against the inner sidewall of the first housing 61 and is detachably connected to the first housing 61 by a second fastening member 11, such as a screw or bolt; the second fastening member 11 is the same component as a part of the first fastening member 10, that is, the flanged portion 82, the first housing 61 and the second housing 62 can be connected by the same fastening member, such as a screw or bolt.
[0063] As can be seen from the structure described above, the main board body 81 serves to support the electrical components 12, and the flanged portion 82 serves to fix the main board body 81 to the inner wall of the first housing 61. Moreover, the flanged portion 82 is connected to the inner wall of the first housing 61 by the second fastening member 11, such as screws or bolts, which is a detachable connection structure, which facilitates later maintenance. Furthermore, the second fastening member 11 and a part of the first fastening member 10 are the same component. That is to say, the flanged portion 82, the first housing 61, and the second housing 62 can be connected by the same fastening member, such as screws or bolts, which simplifies the locking steps and also saves parts.
[0064] Furthermore, preferably, the main body 81 and the flanged part 82 are an integral structure, but of course, it is not limited to this.
[0065] Furthermore, preferably, there are multiple flanged portions 82, which are sequentially spaced along the outer periphery of the main body 81. Of course, this is not the only option; the flanged portion 82 can also be a ring structure, arranged along the outer periphery of the main body 81, depending on the actual needs.
[0066] In this embodiment, preferably, as follows: Figure 7 As shown, the sidewall of the first housing 61 extending along the height direction of the cell 101 includes a main body 621, an inclined portion 622, and a mating portion 623 connected in sequence, such that the mating portion 623 is disposed relative to the main body 621 on the side closer to the cell module 1; along the direction perpendicular to the height direction of the cell 101, the inner sidewall of the first housing 61 abuts against the outer side of the mating portion 623, and along the height direction of the cell 101, the bottom of the sidewall of the first housing 61 abuts against the outer side of the inclined portion 622.
[0067] As can be seen from the structure described above, by setting the inclined part 622, the mating part 623 is positioned relative to the main body 621 and close to the inner side of the cell module 1, thereby avoiding the second housing 62. After the second housing 62 and the first housing 61 are assembled, the side surface of the second housing 62 will not protrude from the side surface of the first housing 61. That is, the side surfaces of the two are flush, which is more aesthetically pleasing and can prevent scratching other structures.
[0068] Furthermore, preferably, the main body 621, the inclined portion 622, and the mating portion 623 are an integral structure, but of course, it is not limited to this.
[0069] In summary, in the structural design of this application, the battery module 1 and the electrical component 12 are effectively isolated by the electrical isolation plate 8. Specifically, the electrical component 12 is fixedly installed on the electrical isolation plate 8, and the electrical isolation plate 8 is reliably fixed inside the first housing 61, such as the lower box, by fastening components such as screws or bolts. At the same time, to ensure the safety of the system, a heat insulation plate 9 is attached to the lower part of the electrical isolation plate 8. The heat insulation plate 9 can not only effectively isolate the heat transfer between the battery module 1 and the electrical component 12, but also prevent thermal runaway caused by the failure of the battery 101 from damaging the electrical component 12. Moreover, this structural design can not only effectively avoid the chain reaction of the failure of the battery 101 to the electrical components, but also provide convenience during system maintenance, making it easy to disassemble and replace the electrical components.
[0070] A heating film 2 and a battery module 1 are arranged below the heat insulation plate 9. The heating film 2 is fixedly connected to the battery module 1 by thermally conductive adhesive. At the same time, a thermally conductive pad 102 is arranged between adjacent battery modules 1 to form a complete heat conduction path. Heat can be evenly transferred to the outside and inside of the battery module 1, thereby achieving efficient thermal management and ensuring the stable operation and temperature regulation of the battery module 1 in low-temperature environments.
[0071] 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 pack, characterized in that, include: The battery cell module, the heating film, and the thermally conductive adhesive; wherein the heating film is disposed on at least one side of the battery cell module, and the heating film is bonded to the battery cell module by the thermally conductive adhesive.
2. The battery pack according to claim 1, characterized in that, The battery module includes multiple battery cells, and the multiple battery cells are stacked together sequentially along a first preset direction.
3. The battery pack according to claim 2, characterized in that, A thermal pad is disposed between any two adjacent battery cells, and the thermal pad is in contact with the thermal adhesive.
4. The battery pack according to claim 1, characterized in that, The battery pack also includes a housing, and the battery cell module and the heating film are both disposed inside the housing.
5. The battery pack according to claim 4, characterized in that, The inner wall of the outer casing is provided with a heat insulation layer; and / or Along the height direction of the battery cell, the outer edge of the projection of the heating film extends beyond the outer edge of the projection of the battery cell module; a thermally conductive structural adhesive is filled between the battery cell module and the outer casing, and along a direction perpendicular to the height direction of the battery cell, the thermally conductive structural adhesive on the side of the battery cell contacts the structure of the heating film that extends beyond the battery cell module.
6. The battery pack according to claim 4, characterized in that, The battery pack also includes an electrical isolation plate and a heat insulation plate; wherein the electrical isolation plate is disposed on the side of the heating film away from the cell module, and the heat insulation plate is disposed between the two.
7. The battery pack according to claim 6, characterized in that, The outer casing includes a first casing and a second casing; wherein the battery cell module, the heating film and the electrical isolation plate are all disposed inside the first casing, and along the height direction of the first casing, the electrical isolation plate, the heating film and the battery cell module are arranged sequentially from top to bottom; the second casing is fastened to the top opening end of the first casing, and the two are detachably connected by a first fastening member.
8. The battery pack according to claim 7, characterized in that, The electrical isolation plate includes a main board body and a flanged portion connected to each other; wherein, the main board body is used to mount electrical components, the flanged portion abuts against the inner sidewall of the first housing, and is detachably connected to the first housing via a second fastening member; the second fastening member is the same component as a portion of the first fastening member; and / or The sidewall of the first housing extending along the height direction of the battery cell includes a main body, an inclined portion, and a mating portion connected in sequence, such that the mating portion is disposed relative to the main body and closer to the battery cell module side; along a direction perpendicular to the height direction of the battery cell, the inner sidewall of the first housing abuts against the outer side of the mating portion, and along the height direction of the battery cell, the bottom of the sidewall of the first housing abuts against the outer side of the inclined portion.
9. The battery pack according to claim 6, characterized in that, The heat insulation board is bonded to the side of the electrical isolation board near the heating film.
10. The battery pack according to any one of claims 1 to 9, characterized in that, The heating film is an electric heating film.