Battery module

Abstract

The utility model provides a battery module which comprises a box body, a battery cell group and a tearing piece, and the battery cell group is arranged in the box body; the tearing piece is located between the box body and the battery cell group, an adhesive layer for adhesion is arranged between the tearing piece and the box body and / or the battery cell group, the tearing piece is provided with an operation part extending out of the space between the box body and the battery cell group, and the operation part drives the tearing piece to deform and enables the adhesive layer to be separated from at least one of the tearing piece, the box body and the battery cell group. According to the utility model, the problem that the battery cell group is difficult to disassemble after the bottom surface of the battery cell group is glued in the prior art is solved.

Description

Technical Field

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

[0002] The traditional method of fixing the battery cells of a battery pack is usually to glue the bottom surface, and the glue used is generally a thermally conductive structural glue (with bottom liquid cooling). The battery cells are glued to the bottom and sides of the box through the thermally conductive structural glue, or the battery cells are glued to the bottom liquid cooling plate through the thermally conductive structural glue. Although the above-mentioned bonding method is simple, the gluing method makes the disassembly process of the battery cells more difficult, resulting in time-consuming and laborious disassembly, especially when the battery cells of the battery pack are grouped more densely, leaving less space for disassembly, making it more difficult to start disassembly. Utility Model Content

[0003] The main purpose of the utility model is to provide a battery module to solve the problem in the prior art that the battery cell group is difficult to disassemble after the bottom surface of the battery cell group is glued.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a battery module, including a case, a battery cell group, and a tear piece, wherein the battery cell group is arranged in the case; the tear piece is located between the case and the battery cell group, and an adhesive layer for gluing is provided between the tear piece and the case and / or the battery cell group, and the tear piece has an operating portion extending between the case and the battery cell group, and the operating portion drives the tear piece to deform and separates the adhesive layer from at least one of the tear piece, the case and the battery cell group.

[0005] Furthermore, the tearing piece includes a bottom portion attached to the bottom surface of the battery cell group and a side portion attached to the side surface of the battery cell group, the side portion and the bottom portion are bent and connected, and the operating portion is located at an end of the side portion away from the bottom and protrudes from the top surface of the battery cell group.

[0006] Furthermore, the battery module also includes a heat conductive member, the tear piece has a hollow area, the heat conductive member is located in the hollow area and contacts the box body and the battery cell group.

[0007] Furthermore, the tearing piece includes a bottom portion attached to the bottom surface of the battery cell group, and the hollow area is located at the bottom portion.

[0008] Furthermore, the bottom portion includes a plurality of edge portions, the edge portions are located at the edges of the bottom portion, the edge portions are spaced apart to form a hollow area, and the adhesive layer is located on the surface of the edge portions.

[0009] Furthermore, the edge portion and the hollow area both extend along the length direction of the battery cell group and are arranged along the width direction of the battery cell group.

[0010] Furthermore, two opposite surfaces of the edge portion both have an adhesive layer, and the sum of the thickness of the edge portion and the adhesive layer is less than or equal to the thickness of the heat conducting member.

[0011] Furthermore, the tearing piece is an insulating piece.

[0012] Furthermore, the box body includes side panels and a bottom panel, which together form a receiving cavity, in which the battery cell group is received, and tearing pieces are provided between the side panels and the battery cell group and between the bottom panel and the battery cell group.

[0013] Furthermore, the box body includes side panels, a bottom plate and a liquid cooling plate, the side panels and the bottom plate together form a accommodating cavity, the liquid cooling plate and the bottom plate are stacked and located in the accommodating cavity, the battery cell group is accommodated in the accommodating cavity, and tearing pieces are provided between the side panels and the battery cell group and between the liquid cooling plate and the battery cell group.

[0014] By applying the technical solution of the utility model, a tear piece is provided between the box body and the battery cell group, and an operating part is provided on the tear piece, so that the box body and the battery cell group can be separated under the action of the tear piece. Specifically, the operating part protrudes from the box body and the battery cell group, the battery cell group and the tear piece are fixed with an adhesive layer, and the box body and the tear piece are also fixed with an adhesive layer. During disassembly, the tear piece is deformed by the operating part, so that the tear piece is separated from the box body, and the battery cell group can be separated from the box body, so as to facilitate the replacement and maintenance of the battery cell group. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 The structure diagram of the battery module of the first embodiment of the present utility model is shown;

[0017] Figure 2 A partial enlarged view of the battery module of the first embodiment is shown;

[0018] Figure 3 A schematic diagram showing the structure of the cooperation between the battery cell group and the tearing piece of the first embodiment is shown;

[0019] Figure 4 Shows Figure 3 A partial enlarged view of the bottom left side of ;

[0020] Figure 5 Shows Figure 3 A schematic diagram of the structure from another perspective;

[0021] Figure 6 An exploded view of the battery cell group, tear piece, adhesive layer and heat conductive member of the first embodiment is shown;

[0022] Figure 7 A schematic structural diagram of the tearing member of the first embodiment is shown;

[0023] Figure 8 Shows Figure 7 A partial enlarged view of the bottom left side of ;

[0024] Fig. 9 Shows Figure 7 Schematic diagram of the expansion;

[0025] Fig.10 A bottom cross-sectional view of the battery module of the first embodiment is shown;

[0026] Fig.11 Shows Fig.10 A partial enlarged view of the middle edge.

[0027] The above drawings include the following reference numerals:

[0028] 10. Box body; 20. Battery cell group; 30. Tear piece; 31. Bottom; 311. Hollow area; 312. Edge; 32. Side; 33. Operating part; 40. Adhesive layer; 50. Heat conducting member. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0031] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0032] In order to solve the problem in the prior art that the battery cell group is difficult to disassemble after the bottom surface of the battery cell group is glued, the utility model provides a battery module.

[0033] Embodiment 1

[0034] like Figures 1 to 11A battery module shown includes a case 10, a cell group 20, and a tear piece 30. The cell group 20 is arranged in the case 10; the tear piece 30 is located between the case 10 and the cell group 20, and an adhesive layer 40 for gluing is provided between the tear piece 30 and the case 10 and / or the cell group 20. The tear piece 30 has an operating portion 33 extending between the case 10 and the cell group 20. The operating portion 33 drives the tear piece 30 to deform and separates the adhesive layer 40 from at least one of the tear piece 30, the case 10 and the cell group 20.

[0035] This embodiment uses the deformation property of the tearing piece 30 by setting the tearing piece 30 between the box 10 and the battery pack 20, so that the box 10 and the battery pack 20 can be separated under the action of the tearing piece 30, and the setting of the operating part 33 allows personnel to easily pull the tearing piece 30. Specifically, when disassembly is required, the personnel pulls the operating part 33, and the operating part 33 causes the tearing piece 30 to deform as a whole. Due to the deformation of the tearing piece 30, the adhesiveness of the adhesive layer 40 on the surface of the tearing piece 30 changes, and the adhesive layer 40 is no longer tightly bonded to the tearing piece 30, the box 10 and the battery pack 20, so that the battery pack 20 can be separated from the box 10. On the one hand, the above-mentioned arrangement utilizes the adhesive layer 40 on the surface of the tear piece 30, so that the battery cell group 20 can still be adhered to the inner wall of the box body 10 through the adhesive layer 40, thereby realizing the quick installation and fixation of the battery cell group 20. On the other hand, the characteristics of the tear piece 30 are utilized to make the adhesive layer 40 easy to separate, thereby facilitating the replacement and maintenance of the battery cell group 20.

[0036] It should be noted that the width direction in this embodiment refers to the direction perpendicular to the arrangement direction of the battery cells in the battery cell group 20, that is, Figure 3 The length direction refers to the direction in which the cells in the cell group 20 are arranged, that is, Figure 3 The height direction refers to the direction perpendicular to both the width and length directions, that is, Figure 3 The up and down directions in .

[0037] like Figure 3 , Figure 4 , Figure 5As shown, the tearing piece 30 of this embodiment includes a bottom 31 attached to the bottom surface of the battery cell group 20 and a side 32 attached to the side of the battery cell group 20, and the side 32 and the bottom 31 are bent and connected. Specifically, in this embodiment, the tearing piece 30 includes two side portions 32 and a bottom 31, and the two side portions 32 extend along the height direction of the battery cell group 20 and are attached to the end surfaces at both ends of the length direction of the battery cell group 20, that is, attached to the side surfaces with larger battery cell areas at both ends, and the bottom 31 extends along the length direction of the battery cell group 20 and is attached below the bottom surface of the battery cell group 20. The two ends of the bottom 31 are respectively connected to the two side portions 32, so as to form an integral tearing piece 30. The bottom 31 and the side 32 of the tearing piece 30 are both provided with an adhesive layer 40 to fix the battery cell group 20 and the box 10. The operating part 33 is located at one end of the side portion 32 away from the bottom 31 and protrudes from the top surface of the battery cell group 20 to avoid the position of the battery cell group 20 and the box body 10, so as to facilitate operation. Preferably, there are two operating parts 33, which are symmetrically arranged at the top edges of the two side portions 32 of the tearing member 30. In this way, when removing the battery cell group 20, the personnel can pull up the two operating parts 33 at the same time, which makes it easier to pull up the tearing member 30 so that the tearing member 30 is deformed and the battery cell group 20 is removed from the box body 10. Of course, the specific structural form of the tearing member 30 is not limited to the above-mentioned form of this embodiment. It is also possible to adopt a setting mode such as only setting the tearing member 30 between the side of the battery cell group 20 and the box body 10, as long as the bonding connection between the battery cell group 20 and the box body 10 can be achieved and the bonding between the battery cell group 20 and the box body 10 can be removed by the tearing member 30.

[0038] Since the tearing piece 30 is mostly arranged in the gap between the battery pack 20 and the box 10, the tearing piece 30 is preferably a sheet-shaped tearing piece, so that the overall thickness of the tearing piece is relatively thin, which is convenient for disassembly and does not have a great impact on the original structure. The specific thickness of the tearing piece can be selected accordingly as needed.

[0039] like Figure 5 As shown, the operating portion 33 is arranged at the top edge of the side portion 32 and at the center of the wide side in the width direction of the battery cell group 20, so that the force on the tearing piece 30 can be relatively balanced when force is applied. The width of the operating portion 33 can be equal to the width of the side portion 32, or it can be smaller than the width of the side portion 32, so as to distinguish it from the side portion 32, facilitate operation and have a certain strength. The shape of the operating portion 33 can be a rectangular piece, or it can be other shapes such as a triangular piece. Of course, the specific size and shape of the operating portion 33 can also be set to other forms, as long as it can drive the tearing piece 30 to detach from the box body 10. For example, a hole can be opened in the middle of the operating portion 33 to facilitate the insertion of hands or tools to operate it.

[0040] like Figure 6 , Figure 7 , Figure 8 As shown, in this embodiment, the battery module also includes a heat conductive member 50, and the tearing member 30 has a hollow area 311. In this embodiment, the hollow area 311 is set at the bottom 31 of the tearing member 30, and the heat conductive member 50 is located in the hollow area 311. In this way, the heat conductive member 50 can penetrate the opposite sides of the tearing member 30, so that the heat conductive member 50 is in contact with the box 10 and the battery cell group 20 at the same time. In this way, while ensuring that the battery cell group 20 and the box 10 are easy to disassemble, the heat dissipation effect of the battery cell group 20 is improved by the setting of the heat conductive member 50. The reason why the hollow area 311 is set to the bottom 31 in this embodiment is that when the tearing member 30 is pulled up, the tearing member 30 needs to bear a certain force, especially the side 32 as the main force-bearing area, so setting the hollow area 311 to the bottom 31 can avoid the possibility of the tearing member 30 breaking when it is pulled up to a certain extent. Of course, the hollow area 311 may not only be provided on the bottom 31 , but the hollow area 311 and the heat conducting member 50 may also be provided on the side 32 .

[0041] Optionally, the heat conducting member 50 may use a heat conducting adhesive, the main component of which is silicone grease, which is soft and sticky like toothpaste, has a certain viscosity but not large, and is mainly used for bottom surface liquid cooling heat conduction. The tearing piece 30 may be made of polycarbonate material, which has a certain toughness to avoid the tearing piece 30 from breaking when the tearing piece 30 is pulled up.

[0042] like Fig. 9 As shown, in this embodiment, the bottom 31 includes a plurality of edge portions 312, and the edge portions 312 are located at the edges of the bottom 31. The edge portions 312 are spaced apart to form a hollow area 311, and the adhesive layer 40 is located on the surface of the edge portions 312. In this way, the edge portions 312 are located around the hollow area 311, and the adhesive layer 40 is only provided on the upper surface and / or the lower surface of the edge portions 312, thereby ensuring reliable and convenient bonding and disassembly, and the edge portions 312 can also shield the hollow area 311, so that the heat conductive member 50 is concentrated in the hollow area 311 without overflowing, thereby ensuring the stability of heat conduction.

[0043] Specifically, the bottom 31 of the present embodiment includes two edge portions 312 and a hollow area 311, and the edge portions 312 and the hollow area 311 both extend along the length direction of the battery cell group 20. The edge portions 312 and the hollow area 311 of the present embodiment are in a straight line shape, covering the entire length of the bottom surface of the battery cell group 20 in the length direction, and in the width direction, the edge portions 312 and the hollow area 311 are alternately arranged in sequence along the width direction of the battery cell group 20, thereby forming an arrangement of edge portions 312, hollow areas 311, and edge portions 312 in the width direction of the battery cell group 20. In this way, on the one hand, the two ends of the edge portion 312 can be respectively connected to the two side portions 32, thereby ensuring the integrity of the tearing piece 30, and on the other hand, the hollow area 311 can be naturally formed to ensure the effect of filling the heat conductive member 50 in the hollow area 311. By cooperating with the adhesive layer 40 and the heat conducting member 50, the edge portion 312, the battery cell group 20, and the box body 10 are bonded together and have a good heat conduction effect. Of course, the specific setting form of the hollow area 311 and the edge portion 312 is not limited to the above-mentioned setting method of this embodiment. The number, shape, etc. can be changed as needed. For example, the edge portion 312 can form a square shape on the bottom surface of the battery cell group 20, and the area in the middle of the square shape is used as the hollow area 311. The outer edge of the square shape can be connected to the side portion 32, which can also achieve the above-mentioned effect. However, this setting method reduces the size of the hollow area 311, so the heat conduction effect will be relatively reduced, but the structural strength will be improved.

[0044] In this embodiment, the two opposite surfaces of the edge portion 312 are provided with adhesive layers 40, that is, the surface of the edge portion 312 close to the battery cell group 20 and the surface close to the box body 10 are provided with adhesive layers 40, so that the edge portion 312 is fixed between the battery cell group 20 and the box body 10. And preferably, the sum of the thickness of the edge portion 312 and the adhesive layer 40 is less than or equal to the thickness of the heat conductive member 50. The reason for adopting this setting is that the heat conductive member 50 is soft and has a high deformability, so a larger amount can be filled into the hollow area 311. When the edge portion 312 and the adhesive layer 40 fix the battery cell group 20 and the box body 10, the heat conductive member 50 can be squeezed and deformed by the battery cell group 20 and the box body 10, so that the thickness of the heat conductive member 50 is equal to or slightly greater than the sum of the thickness of the edge layer and the adhesive layer 40, so that the heat conductive member 50 can be fully in contact with the battery cell group 20 and the box body 10 after being pressed, thereby enhancing its heat conduction effect. It should be noted that during assembly, the adhesive layer 40 and the heat conducting member 50 can be mixed at positions close to each other without causing any harmful effects, and the adhesive layer 40 will harden later to play a fixing role.

[0045] In this embodiment, the tearing piece 30 is an insulating piece. Thus, the tearing piece 30 also plays an insulating role. Even if the battery cell group 20 leaks electricity due to damage, the safety of the personnel who disassemble the battery cell group 20 can be guaranteed, thereby preventing accidents caused by leakage of the battery cell group 20.

[0046] like Figure 1 , Figure 2 As shown, the box body 10 of this embodiment includes a side plate and a bottom plate, which together form a receiving cavity, and the battery cell group 20 is received in the receiving cavity. A tearing piece 30 is provided between the side plate and the battery cell group 20 and between the bottom plate and the battery cell group 20. Figure 6 As shown, the tearing piece 30 is arranged based on the shape of the side 32 and the bottom 31 of the battery cell group 20. The side 32 of the tearing piece 30 is arranged between the side plate of the box body 10 and the side of the battery cell group 20, and the bottom 31 of the tearing piece 30 is arranged between the bottom plate of the box body 10 and the bottom 31 of the battery cell group 20. In this way, the tearing piece 30 and the battery cell group 20 are both placed in the accommodating cavity formed by the box body 10, and only the operating part 33 is exposed. When the tearing piece 30 is pulled up, the tearing piece 30 detaches from the box body 10, thereby separating the battery cell group 20 from the box body 10.

[0047] Embodiment 2

[0048] Different from the first embodiment, in this embodiment, a liquid cooling plate is disposed between the bottom 31 of the tearing member 30 and the bottom plate of the box body 10 to improve the heat dissipation effect of the box body 10 .

[0049] In this embodiment, the box body 10 includes a side panel, a bottom panel and a liquid cooling plate, the side panel and the bottom panel together form a accommodating cavity, the liquid cooling plate and the bottom panel are stacked and located in the accommodating cavity, the battery cell group 20 is accommodated in the accommodating cavity and is located above the liquid cooling plate, and a tearing piece 30 is arranged between the side panel and the battery cell group 20, and between the liquid cooling plate and the battery cell group 20. That is to say, the side portion 32 of the tearing piece 30 is arranged in the same manner as in the first embodiment, and is arranged between the side surface of the battery cell group 20 and the side panel of the box body 10. The difference is that the bottom 31 of the tearing piece 30 is arranged between the liquid cooling plate and the bottom surface of the battery cell group 20, thereby improving the thermal conductivity of the box body 10. In this way, the hollow area 311 of the tearing piece 30 in the first embodiment is filled with a heat conductive member 50 to cooperate with the liquid cooling plate in this embodiment, thereby solving the battery cell cooling problem.

[0050] It should be noted that, the multiple in the above embodiments refers to at least two.

[0051] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0052] 1. It solves the problem in the prior art that the battery pack is difficult to disassemble after the bottom surface of the battery pack is glued;

[0053] 2. The setting of the tear-off piece makes the replacement and maintenance of the battery pack more convenient;

[0054] 3. The hollow area of ​​the tear-off piece is filled with heat-conducting parts and combined with a liquid cooling plate to solve the problem of battery cell cooling.

[0055] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0057] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0058] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery module, characterized in that: include: Box body (10); A battery cell group (20), wherein the battery cell group (20) is arranged in the box (10); A tearing piece (30), the tearing piece (30) is located between the box (10) and the battery cell group (20), and an adhesive layer (40) for gluing is provided between the tearing piece (30) and the box (10) and / or the battery cell group (20), the tearing piece (30) has an operating portion (33) extending between the box (10) and the battery cell group (20), the operating portion (33) drives the tearing piece (30) to deform, and separates the adhesive layer (40) from at least one of the tearing piece (30), the box (10) and the battery cell group (20).

2. The battery module according to claim 1, characterized in that: The tearing piece (30) comprises a bottom portion (31) affixed to the bottom surface of the battery cell group (20) and a side portion (32) affixed to the side surface of the battery cell group (20); the side portion (32) and the bottom portion (31) are bent and connected; and the operating portion (33) is located at an end of the side portion (32) away from the bottom portion (31) and protrudes from the top surface of the battery cell group (20).

3. The battery module according to claim 1, characterized in that: The battery module also includes a heat conducting member (50), the tearing member (30) has a hollow area (311), and the heat conducting member (50) is located in the hollow area (311) and is in contact with the box (10) and the battery cell group (20).

4. The battery module according to claim 3, characterized in that: The tearing piece (30) comprises a bottom portion (31) attached to the bottom surface of the battery cell group (20), and the hollow area (311) is located at the bottom portion (31).

5. The battery module according to claim 4, characterized in that: The bottom (31) comprises a plurality of edge portions (312), wherein the edge portions (312) are located at the edges of the bottom (31), the edge portions (312) are spaced apart to form the hollow area (311), and the adhesive layer (40) is located on the surface of the edge portions (312).

6. The battery module according to claim 5, characterized in that: The edge portion (312) and the hollow area (311) both extend along the length direction of the battery cell group (20) and are arranged along the width direction of the battery cell group (20).

7. The battery module according to claim 5, characterized in that: The two opposite surfaces of the edge portion (312) both have the adhesive layer (40), and the sum of the thicknesses of the edge portion (312) and the adhesive layer (40) is less than or equal to the thickness of the heat conducting member (50).

8. The battery module according to claim 1, characterized in that: The tearing piece (30) is an insulating piece.

9. The battery module according to claim 1, characterized in that: The box body (10) comprises a side plate and a bottom plate, wherein the side plate and the bottom plate together form a receiving cavity, wherein the battery cell group (20) is received in the receiving cavity, and the tearing piece (30) is provided between the side plate and the battery cell group (20) and between the bottom plate and the battery cell group (20).

10. The battery module according to claim 1, characterized in that: The box body (10) comprises a side plate, a bottom plate and a liquid cooling plate, the side plate and the bottom plate together enclose a receiving cavity, the liquid cooling plate and the bottom plate are stacked and located in the receiving cavity, the battery cell group (20) is accommodated in the receiving cavity, and the tearing piece (30) is provided between the side plate and the battery cell group (20) and between the liquid cooling plate and the battery cell group (20).

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