Battery box and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a battery box and a battery pack. The battery box comprises a box body, a supporting assembly and a heating film; the box body is provided with a containing cavity used for containing a battery module, a bottom plate of the box body is of a stamping structure, the bottom plate is stamped to enable the bottom face of the containing cavity to form a protruding structure and a concave groove structure, and the protruding structure is arranged towards the interior of the containing cavity in a protruding mode. The heating film is arranged at the bottom of the containing cavity and covers the protruding structure and the groove structure. The supporting assembly has the deformation characteristic and is arranged on the side, facing the bottom of the containing cavity, of the heating film, and at least part of the supporting assembly is arranged between the protruding structure and the heating film. The heating film and the battery module are supported by the supporting assembly, and the supporting assembly can achieve a buffering effect in the process that the battery module moves up and down due to vibration of the box body, so that the damage to the battery module and the box body and the risk of cracking failure can be reduced, and the safety is relatively high.

Description

Technical Field

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

[0002] With the development and progress of society, lithium batteries have quickly entered people's field of vision as a new energy source, and lithium batteries have also been widely used in various fields.

[0003] The battery modules and other electronic components of the battery usually need to be placed inside the battery pack. However, in actual use, when the battery pack is working at a low temperature, the energy released by the battery pack is low and cannot meet the usage requirements. Moreover, when the battery pack is in a vibrating state, the battery modules inside the battery pack are subjected to excessive force during vibration, which can easily cause the battery pack shell to rupture, affecting safety. Utility Model Content

[0004] To this end, the utility model provides a battery box and a battery pack, which solve the technical problems that when the battery pack is working in a low-temperature state, the energy released by the battery pack is low, and when the battery pack is in a vibrating state, the battery modules inside the battery pack are subjected to excessive force during vibration, which easily causes the battery pack shell to rupture.

[0005] To achieve the above-mentioned objectives, the present invention specifically provides the following technical solutions: a battery box, comprising: a box body, provided with a accommodating cavity for accommodating a battery module, the bottom plate of the box body being a stamped structure, the bottom plate being stamped to form a raised convex structure and a recessed groove structure on the bottom surface of the accommodating cavity, the raised structure being arranged to bulge toward the interior of the accommodating cavity; at least one heating film, arranged at the bottom of the accommodating cavity and covering the raised structure and the groove structure, the heating film being used to support and heat the battery module; at least one support component having deformation characteristics, the support component being arranged on the side of the heating film facing the bottom of the accommodating cavity, and at least part of the support component being arranged between the raised structure and the heating film.

[0006] Optionally, the protrusion structure and the groove structure are arranged adjacent to each other along the first direction to form at least one support area; and / or the two protrusion structures are arranged relatively spaced apart along the second direction, and the two groove structures are arranged relatively spaced apart along the second direction to form at least two support areas arranged at intervals.

[0007] Optionally, the support assembly includes a plurality of first support pads, which are arranged at intervals along the first direction, and the positions of the first support pads correspond to the positions of the protruding structure, and are located between the protruding structure and the heating film; the support assembly also includes two oppositely arranged second support pads, which are in a bent structure, and the two second support pads are arranged into a rectangular structure to surround the periphery of the support area, and one of the second support pads is connected to the first support pad.

[0008] Optionally, the first support pad and the second support pad are both foam, and the thickness of the first support pad and the second support pad after being compressed by the battery module is 0.7 to 0.8 times the thickness of each when not subject to external force.

[0009] Optionally, after the first support pads and the second support pads are compressed by the force of the battery module, top surfaces of all the first support pads and top surfaces of all the second support pads are coplanar.

[0010] Optionally, a double-sided tape is provided on a side of the heating film facing away from the supporting assembly.

[0011] Optionally, two opposite surfaces of the support assembly are provided with double-sided tape, wherein the double-sided tape on one side is bonded to the bottom surface of the box body, and the double-sided tape on the other side is bonded to the heating film.

[0012] Optionally, the heating film includes a resistance wire and an insulating heat-conductive film covering the top and bottom surfaces of the resistance wire.

[0013] Optionally, the insulating heat-conductive film is a silicone component.

[0014] In addition, a battery pack is provided, comprising a battery module and the above-mentioned battery box, wherein the battery module is thermally connected to the heating film, and the support assembly is in a compressed state due to the gravity of the battery module.

[0015] Compared with the prior art, the present invention has the following beneficial effects: in the embodiment of the present invention, the bottom plate of the box body is a stamped structure, and the bottom plate can be formed into a convex structure and a groove structure by stamping. The internal space utilization rate of the box body with the stamped structure is high, so that the box body can accommodate more structures; at least one heating film is arranged at the bottom of the accommodating cavity and covers the convex structure and the groove structure. The battery module can be placed on the heating film of the bottom plate in the accommodating cavity, so that the heating film can be in direct contact with the battery module. The battery module can be heated by the heating film to increase the temperature of the battery module and avoid the situation where the battery module releases low energy under low temperature conditions; the support assembly is arranged on the side of the heating film facing the bottom of the accommodating cavity. The support assembly has deformation characteristics so that the heating film and the battery module can be supported by the support assembly, and the support assembly can play a buffering effect in the process of the battery module moving up and down due to the vibration of the box body, so as to reduce the damage to the battery module and the risk of rupture and failure, and the safety is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic structural diagram of a battery box provided in an embodiment of the present utility model;

[0018] Figure 2 A schematic structural diagram of a battery box body and a support assembly provided in an embodiment of the present invention;

[0019] Figure 3 A schematic structural diagram of a first support pad and a second support pad of a battery box provided in an embodiment of the present utility model;

[0020] Figure 4 A schematic structural diagram of a battery box body provided in an embodiment of the present invention.

[0021] Reference numerals:

[0022] Box body 100; accommodating cavity 101; bottom plate 102; supporting area 103; protruding structure 110; groove structure 120; supporting assembly 200; heating film 300; first supporting pad 400; second supporting pad 500. DETAILED DESCRIPTION

[0023] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] Reference below Figures 1 to 4 A battery box and a battery pack according to embodiments of the present invention are described.

[0027] According to the battery box of the embodiment of the first aspect of the present invention, the battery box includes a box body 100, a support assembly 200 and a heating film 300; the box body 100 is provided with a accommodating cavity 101 for accommodating a battery module, and the bottom plate 102 of the box body 100 is a stamped structure. The bottom plate 102 is stamped to form a raised convex structure 110 and a recessed groove structure 120 on the bottom surface of the accommodating cavity 101, and the raised structure 110 is raised toward the inside of the accommodating cavity 101; at least one heating film 300 is arranged at the bottom of the accommodating cavity 101 and covers the raised structure 110 and the groove structure 120, and the heating film 300 is used to carry and heat the battery module; at least one support assembly 200 has a deformation characteristic, and the support assembly 200 is arranged on the side of the heating film 300 facing the bottom of the accommodating cavity 101, and at least part of the support assembly 200 is arranged between the raised structure 110 and the heating film 300.

[0028] In the embodiment of the present invention, the bottom plate 102 of the box body 100 is a stamping structure. The bottom plate 102 can be stamped to form a protruding structure 110 and a groove structure 120. The internal space utilization rate of the box body 100 with the stamping structure is high, so that the box body 100 can accommodate more structures; at least one heating film 300 is set at the bottom of the accommodating cavity 101 and covers the protruding structure 110 and the groove structure 120. The battery module can be placed on the heating film 300 of the bottom plate 102 in the accommodating cavity, so that the heating film 300 can be in direct contact with the battery module, and the heating film 300 can be heated by heating the battery module. 300 can heat the battery module to increase the temperature of the battery module and avoid the situation where the battery module releases low energy under low temperature conditions; the support component 200 is arranged on the side of the heating film 300 facing the bottom of the accommodating cavity 101, and the support component 200 has deformation characteristics so that the heating film 300 and the battery module can be supported by the support component 200, and the support component 200 can play a buffering effect in the process of the battery module moving up and down due to the vibration of the box body, so as to reduce the damage to the battery module and the box body 100 and the risk of rupture and failure, and the safety is higher.

[0029] Reference Figure 2 and Figure 4 It can be understood that the protrusion structure 110 and the groove structure 120 are arranged adjacent to each other along the first direction X to form at least one support area 103, thereby increasing the area where the support assembly 200 and the battery module can be placed; and / or, the protrusion structures 110 are arranged relatively spaced apart along the second direction Y, and the two groove structures 120 are arranged relatively spaced apart along the second direction Y to form at least two support areas 103 set at intervals, thereby further increasing the area where the support assembly 200 and the battery module can be placed.

[0030] Specifically, a plurality of protrusion structures 110 and a plurality of groove structures 120 are provided, and the plurality of protrusion structures 110 and the plurality of groove structures 120 are arranged adjacent to each other along the first direction to form a plurality of support areas 103 for placing battery modules. Among the plurality of protrusion structures 110 and the plurality of groove structures 120, the protrusion structures 110 are arranged in pairs relative to each other along the second direction Y, and the groove structures 120 are arranged in pairs relative to each other along the second direction Y to form a plurality of support areas 103 arranged at intervals; wherein the first direction and the second direction are arranged perpendicular to each other.

[0031] Reference Figure 2 and Figure 3It can be understood that the support assembly 200 includes a plurality of first support pads 400, and the plurality of first support pads 400 are arranged at intervals along the first direction X. The position of the first support pad 400 corresponds to the position of the protruding structure 110, and is located between the protruding structure 110 and the heating film 300; the support assembly 200 also includes two oppositely arranged second support pads 500, and the second support pads 500 are in a bent structure. The two second support pads 500 are arranged in a rectangular structure to surround the outer periphery of the support area 103, and one of the second support pads 500 is connected to the first support pad 400.

[0032] A plurality of first support pads 400 are arranged at intervals along the first direction on the support area 103, and a plurality of second support pads 500 are arranged on the surrounding sides of the plurality of first support pads 400; wherein, the plurality of first support pads 400 are arranged between the protrusion structure 110 and the heating film 300, and at least one second support pad 500 is arranged between the groove structure 120 and the heating film 300; one of the second support pads 500 is connected to the first support pad 400 so as to improve the stability of the overall structure of the support assembly 200.

[0033] The cushioning effect can be improved by setting multiple first support pads 400 and second support pads 500; multiple first support pads 400 are set between the protruding structure 110 and the heating film 300, so that the heating film 300 can be supported by multiple first support pads 400, reducing the degree of downward concave deformation of the heating film 300, and improving the fit between the heating film 300 and the battery module, wherein the multiple second support pads 500 can support the edge portion of the heating film 300.

[0034] Specifically, multiple first support pads 400 are arranged in sequence and spaced apart in the same direction so as to be able to carry multiple battery modules respectively. Multiple battery modules can be placed one by one on the heating film 300 and located at positions corresponding to the first support pads 400, so that multiple battery modules can be supported one by one by multiple first support pads 400, thereby improving the stability of the support.

[0035] The second support pad 500 is arranged at the periphery of the plurality of first support pads 400 so that the edge portion of the heating film 300 can be supported by the second support pad 500. Specifically, the second support pad 500 can support the heating film 300 beyond the outer edge of the protruding structure 110, thereby improving the effect of the heating film 300 in supporting the battery module.

[0036] It is understandable that the first support pad 400 and the second support pad 500 are both made of foam, so that the first support pad 400 and the second support pad 500 have excellent anti-compression deformation performance and waterproof performance, which can meet the needs of cushioning applications;

[0037] The thickness of the first support pad 400 and the second support pad 500 after being compressed by the battery module is 0.7 to 0.8 times their thickness when not subjected to external force, which can better maintain the stress of the first support pad 400 and the second support pad 500 after being compressed, thereby improving the support effect.

[0038] Reference Figure 1 and Figure 2 It can be understood that, since the first support pad 400 is disposed on the protruding structure 110 , at least a portion of the second support pad 500 is disposed between the protruding structure 110 and the first support pad 400 .

[0039] After the first support pad 400 and the second support pad 500 are compressed by the force of the battery module, the top surfaces of all the first support pads 400 and the top surfaces of all the second support pads 500 are coplanar, so that the top surfaces of the heating films 300 on the first support pads 400 and the second support pads 500 can be arranged coplanar, thereby improving the stability of the battery module on the heating film 300 and reducing the degree of left and right tilt of the battery module.

[0040] It can be understood that by providing double-sided tape on the side of the heating film 300 facing away from the support assembly 200, the battery module on the heating film 300 can be connected to the heating film 300 through the double-sided tape, so as to stably connect the heating film 300 and the battery module, improve the stability of the battery module on the heating film 300, and reduce the amplitude of the up and down vibration of the battery module.

[0041] It is understandable that the two opposite surfaces of the support assembly 200 are provided with double-sided tape, the double-sided tape on one side is bonded to the bottom surface of the box body 100, and the double-sided tape on the other side is bonded to the heating film 300.

[0042] One of the double-sided tapes can be used to stably connect the support assembly 200 and the box body 100, so that the support assembly 200 can be fixedly connected to the bottom surface of the box body 100 to fix the position of the support assembly 200 on the bottom surface of the box body 100, thereby avoiding the support assembly 200 from being misplaced due to vibration or tilt of the box body 100, and improving the stability of the support assembly 200 in supporting the heating film 300 and the battery module.

[0043] Another double-sided tape can be used to stably connect the heating film 300 and the support pad, and can prevent the heating film 300 and the support assembly 200 from separating from each other and being misaligned, thereby preventing the heating film 300 from being misaligned due to vibration or tilt of the box body 100, and improving the stability of the heating film 300 supporting the battery module.

[0044] It can be understood that the heating film 300 includes a resistance wire and an insulating heat-conductive film covering the top and bottom surfaces of the resistance wire.

[0045] The insulating thermally conductive film can play the role of heat conduction and insulation protection. After the heating resistance wire transfers heat to the insulating thermally conductive film, the insulating thermally conductive film can evenly heat the battery module. The insulating thermally conductive film can also prevent the current in the heating resistance wire from being introduced into the battery module, thereby improving safety. Compared with traditional liquid heating and direct heating, the insulating thermally conductive film has a higher temperature rise rate, which can make the battery module heat up in a short time to release more energy. In addition, the insulating thermally conductive film has low cost and is easy to install, which has the advantages of saving costs and improving production efficiency.

[0046] The heating resistance wire is located between two layers of insulating thermally conductive films, one end of the heating resistance wire extends outside the insulating thermally conductive film, and the electrical connection structure is electrically connected to the end of the heating resistance wire located outside the insulating thermally conductive film. By introducing current into the heating resistance wire, heat is emitted through the heating resistance wire to heat the insulating thermally conductive film, thereby achieving the effect of heating the battery module.

[0047] Specifically, the heating resistance wire is bent to evenly increase the path of the heating resistance wire in the silicone layer, thereby evenly heating the silicone layer.

[0048] It is understandable that the insulating heat-conductive film is a silicone component, which can reduce the cost of the heating film 300, is more convenient to install, saves the cost of processing the battery box, and can improve the production efficiency of processing the battery box.

[0049] Reference Figures 1 to 4 The battery pack of the second embodiment of the present invention includes a battery module and a battery box of the first embodiment; the battery module is thermally connected to the heating film 300, and the support assembly 200 is in a compressed state due to the gravity of the battery module.

[0050] By adopting the battery box of the embodiment of the first aspect of the above-mentioned utility model, in the embodiment of the utility model, the bottom plate 102 of the box body 100 is a stamping structure, and the bottom plate 102 can be stamped to form a protruding structure 110 and a groove structure 120. The internal space utilization rate of the box body 100 with the stamping structure is high, so that the box body 100 can accommodate more structures; at least one heating film 300 is arranged at the bottom of the accommodating cavity 101 and covers the protruding structure 110 and the groove structure 120. The battery module can be placed on the heating film 300 of the bottom plate 102 in the accommodating cavity, so that the heating film 300 can be in contact with the battery module. The battery module is in direct contact with the block, and the battery module can be heated by the heating film 300 to increase the temperature of the battery module and avoid the situation where the battery module releases less energy at a low temperature; the support component 200 is arranged on the side of the heating film 300 facing the bottom of the accommodating cavity 101, and the support component 200 has a deformation characteristic so that the heating film 300 and the battery module can be supported by the support component 200, and the support component 200 can play a buffering effect in the process of the battery module moving up and down due to the vibration of the box body, so as to reduce the damage to the battery module and the box body 100 and the risk of rupture and failure, and the safety is higher.

[0051] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0052] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. Battery box, characterized in that, include: A box body (100) is provided with a receiving cavity (101) for receiving a battery module, a bottom plate (102) of the box body (100) is a stamped structure, and the bottom plate (102) is stamped to form a raised convex structure (110) and a recessed groove structure (120) on the bottom surface of the receiving cavity (101), wherein the raised structure (110) is provided to protrude toward the inside of the receiving cavity (101); at least one heating film (300), arranged at the bottom of the accommodating cavity (101) and covering the protruding structure (110) and the groove structure (120), the heating film (300) being used to carry and heat the battery module; At least one support component (200) has a deformation characteristic, the support component (200) is arranged on a side of the heating film (300) facing the bottom of the accommodating cavity (101), and at least a portion of the support component (200) is arranged between the protruding structure (110) and the heating film (300).

2. The battery box according to claim 1, wherein: The protrusion structure (110) and the groove structure (120) are arranged adjacent to each other along a first direction (X) to form at least one support area (103); and / or, two protrusion structures (110) are arranged relatively spaced apart along a second direction (Y), and two groove structures (120) are arranged relatively spaced apart along the second direction (Y) to form at least two support areas (103) arranged at intervals.

3. The battery box according to claim 2, wherein: The support assembly (200) includes a plurality of first support pads (400), wherein the plurality of first support pads (400) are spaced apart along the first direction (X), and the position of the first support pads (400) corresponds to the position of the protruding structure (110), and is located between the protruding structure (110) and the heating film (300); the support assembly (200) also includes two second support pads (500) arranged opposite to each other, wherein the second support pads (500) are in a bent structure, and the two second support pads (500) are arranged in a rectangular structure to surround the outer periphery of the support area (103), wherein one of the second support pads (500) is connected to the first support pad (400).

4. The battery box according to claim 3, wherein: The first support pad (400) and the second support pad (500) are both foams, and the thickness of the first support pad (400) and the second support pad (500) after being compressed by the battery module is 0.7 to 0.8 times the thickness of each when not subject to external force.

5. The battery box according to claim 3, wherein: After the first support pad (400) and the second support pad (500) are compressed by the force of the battery module, the top surfaces of all the first support pads (400) and the top surfaces of all the second support pads (500) are coplanar.

6. The battery box according to any one of claims 1 to 5, characterized in that: A double-sided adhesive tape is provided on a side of the heating film (300) facing away from the support assembly (200).

7. The battery box according to any one of claims 1 to 5, characterized in that: Double-sided tape is provided on two mutually opposing surfaces of the support assembly (200), wherein the double-sided tape on one side is bonded to the bottom surface of the box body (100), and the double-sided tape on the other side is bonded to the heating film (300).

8. The battery box according to any one of claims 1 to 5, characterized in that: The heating film (300) comprises a resistance wire and an insulating heat-conductive film covering the top and bottom surfaces of the resistance wire.

9. The battery box according to claim 8, wherein: The insulating heat-conductive film is a silicone component.

10. A battery pack, characterized in that: The invention comprises a battery module and a battery box according to any one of claims 1 to 9, wherein the battery module is thermally connected to the heating film (300), and the support assembly (200) is in a compressed state due to the gravity of the battery module.

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