Battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack which comprises a battery box body, a battery pack and a first adhesive layer, at least part of the battery box body is formed by a rolling process, the rolling direction of the rolling process is a first direction, and the first direction defines a reference surface; the battery pack is arranged in the battery box body and comprises at least one battery column, the battery column comprises at least two single batteries arranged along a second direction, the second direction is perpendicular to the reference surface, the height direction of the single batteries is a third direction, and the third direction is parallel to the reference surface and perpendicular to the second direction; the first adhesive layer is arranged on the side face of the battery column in the fourth direction, the fourth direction is parallel to the datum plane and perpendicular to the third direction, and the first adhesive layer is used for bonding and fixing at least two single batteries belonging to the same battery column.

Description

Technical Field

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

[0002] In the existing battery design, multiple battery rows are respectively glued to the battery box body. For example, multiple battery rows are respectively bonded and fixed to the bottom plate of the battery box body via a heat-conducting structural adhesive. This design makes each battery row relatively independent, resulting in poor overall shear strength of the battery pack. Especially in the solution of a battery box body formed by a rolling process, since the battery box body formed by rolling has a large flexibility, it has higher requirements for the overall shear strength of the battery pack, and the above existing design is difficult to meet such design requirements. Summary of the Utility Model

[0003] A main object of the utility model is to overcome at least one defect of the above existing technology, and to provide a battery pack, in which the battery pack has better overall shear strength.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] According to one aspect of the utility model, there is provided a battery pack, which includes a battery box body, a battery pack and a first adhesive layer; at least part of the battery box body is formed by a rolling process, and the rolling direction of the rolling process is a first direction, and the first direction defines a reference plane; the battery pack is arranged in the battery box body and includes at least one battery row, the battery row includes at least two single cells arranged along a second direction, the second direction is perpendicular to the reference plane, the height direction of the single cell is a third direction, the third direction is parallel to the reference plane and perpendicular to the second direction; the first adhesive layer is arranged on the side surface of the battery row in a fourth direction, the fourth direction is parallel to the reference plane and perpendicular to the third direction, and the first adhesive layer is used for bonding and fixing at least two of the single cells belonging to the same battery row.

[0006] It can be seen from the above technical solutions that the advantages and positive effects of the battery pack proposed by the utility model are as follows:

[0007] The battery pack proposed by the present utility model includes a battery box body, a battery pack, and a first adhesive layer; at least part of the battery box body is formed by a rolling process, and the rolling direction of the rolling process is the first direction, and the first direction defines a reference plane; the battery pack includes at least one battery row, and the battery row includes at least two single cells arranged in the second direction, and the second direction is perpendicular to the reference plane; the first adhesive layer is arranged on the side surface of the battery row to bond and fix at least two single cells belonging to one battery row. Through the above structural design, the present utility model uses the first adhesive layer to bond and fix each single cell in the same battery row, thereby improving the overall shear resistance of the battery row. When the battery pack uses a battery box body formed by a rolling process, the present utility model can meet the higher requirements for the overall shear resistance of the battery pack due to the greater flexibility of such a battery box body, which is beneficial to improving the module stiffness and effectively optimizing the system mode and strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] By considering the following detailed description of the preferred embodiments of the present utility model in conjunction with the accompanying drawings, various objectives, features, and advantages of the present utility model will become more apparent. The drawings are only illustrative diagrams of the present utility model and are not necessarily drawn to scale. In the drawings, the same reference numerals always represent the same or similar components. Among them:

[0009] Figure 1 is a schematic perspective view of a battery pack shown according to an exemplary embodiment;

[0010] Figure 2 is Figure 1 a schematic partial cross-sectional view of the battery pack shown;

[0011] Figure 3 is a schematic perspective view of a battery pack shown according to another exemplary embodiment;

[0012] Figure 4 is Figure 3 a schematic partial cross-sectional view of the battery pack shown;

[0013] Figure 5 is a schematic partial cross-sectional view of a battery pack shown according to another exemplary embodiment;

[0014] Figure 6 is Figure 5 an enlarged schematic view of part A in;

[0015] Figure 7 and Figure 8 are respectively schematic partial cross-sectional views of a battery pack shown according to two other exemplary embodiments;

[0016] Figure 9 is Figure 8 an enlarged schematic view of part B in;

[0017] Figure 10 It is a partial cross-sectional schematic view of a battery pack shown according to another exemplary embodiment.

[0018] The description of the reference numerals is as follows:

[0019] 100. Battery box body;

[0020] 110. Bottom plate;

[0021] 120. Frame;

[0022] 130. Internal beam;

[0023] 200. Battery pack;

[0024] 201. Shoulder;

[0025] 210. Battery row;

[0026] 211. Single battery;

[0027] 220. Heat insulation pad;

[0028] 221. Second adhesive layer;

[0029] 230. Reinforcing member;

[0030] 231. Adhesive receiving groove;

[0031] 232. Fourth adhesive layer;

[0032] 310. First adhesive layer;

[0033] 320. Third adhesive layer;

[0034] 330. Fifth adhesive layer;

[0035] D1. Thickness;

[0036] D2. Thickness;

[0037] H1. Height;

[0038] H2. Height;

[0039] H3. Height;

[0040] W. First direction;

[0041] X. Fourth direction;

[0042] Y. Second direction; Z. Third direction. Detailed implementation manners

[0043] Typical embodiments embodying the features and advantages of the present utility model will be described in detail in the following description. It should be understood that the present utility model can have various variations in different embodiments, all of which do not depart from the scope of the present utility model, and the descriptions and drawings therein are for illustrative purposes in essence, rather than for limiting the present utility model.

[0044] In the following description of different exemplary embodiments of the present utility model, reference is made to the accompanying drawings, which form a part of the present utility model, and in which different exemplary structures, systems, and steps for implementing various aspects of the present utility model are shown by way of example. It should be understood that other specific solutions of components, structures, exemplary devices, systems, and steps can be used, and structural and functional modifications can be made without departing from the scope of the present utility model. Moreover, although terms such as "above", "between", "inside", etc. may be used in this specification to describe different exemplary features and elements of the present utility model, these terms are used herein only for convenience, for example, according to the directions of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional direction of the structure to fall within the scope of the present utility model.

[0045] Refer to Figure 1 , which representatively shows a schematic three-dimensional structure diagram of the battery pack proposed by the present utility model. In this exemplary embodiment, the battery pack proposed by the present utility model is described by taking an in-vehicle battery as an example. It is easy for those skilled in the art to understand that in order to apply the relevant designs of the present utility model to other types of battery devices, various modifications, additions, substitutions, deletions, or other changes are made to the following specific embodiments, and these changes are still within the scope of the principle of the battery pack proposed by the present utility model.

[0046] As Figure 1 shown, in an embodiment of the present utility model, the battery pack proposed by the present utility model includes a battery box body 100, a battery pack 200, and a first adhesive layer 310. Referring in conjunction with Figure 2 , Figure 2 representatively shows a partial cross-sectional schematic diagram of the battery pack, and the cross-section taken is a plane parallel to the above-mentioned reference plane. The structures, connection methods, and functional relationships of the main components of the battery pack proposed by the present utility model will be described in detail below in conjunction with the above-mentioned drawings.

[0047] As Figure 1 and Figure 2 shown, in an embodiment of the present utility model, at least part of the battery box body 100 is formed by a rolling process, and the rolling direction of the rolling process is the first direction W. Among them, the above-mentioned rolling direction can be understood as the direction in which the sheet used to manufacture the battery box body 100 rotates and winds in the rolling equipment, and specifically can refer to Figure 2The first direction W in it, the rolling direction (i.e., the first direction W) is approximately a circumferential spiral direction, and the spiral direction can be counterclockwise or clockwise, and the circumferential plane is the plane of the attached drawing, that is, the first direction W defines a reference plane, and this reference plane is the plane where the plane of the attached drawing is located. Among them, the battery pack 200 is arranged in the battery box 100, and the battery pack 200 includes at least one battery row 210. The battery row 210 includes at least two single cells 211 arranged along the second direction Y, and the above-mentioned second direction Y is perpendicular to the above-mentioned reference plane. The height direction of the single cell 211 is the third direction Z, and the third direction Z is parallel to the above-mentioned reference plane and perpendicular to the second direction Y. On this basis, the first adhesive layer 310 is arranged on the side surface of the battery row 210 in the fourth direction X, and the fourth direction X is parallel to the above-mentioned reference plane and perpendicular to the third direction Z. The first adhesive layer 310 can bond and fix at least two single cells 211 belonging to the same battery row 210. Through the above structural design, the utility model uses the first adhesive layer 310 to bond and fix each single cell 211 of the same battery row 210, thereby improving the overall shear resistance of the battery row 210. When the battery pack uses the battery box 100 formed by the rolling process, the utility model can meet the higher requirements for the overall shear resistance of the battery pack due to the greater flexibility of such a battery box 100, which is beneficial to improving the module stiffness and effectively optimizing the system mode and strength. Specifically, when the battery box 100 is formed by the rolling process, compared with the battery box formed by other processes, such a battery box 100 has greater flexibility and will generate a greater shear force on the battery row 210. Therefore, the overall shear resistance of the battery row 210 is required to be higher. In this regard, the utility model uses the first adhesive layer 310 to bond and fix on the side surfaces of each single cell 211 of the battery row 210, which can improve the overall shear resistance of the battery row 210, thereby meeting the higher requirements for the shear resistance of the battery pack 200 (battery row 210) when the battery box 100 is formed by the rolling process. As Figure 2 shown, along the third direction Z, the ratio of the height H1 of the first adhesive layer 310 in the height H2 of the single cell 211 can be 1 / 4 to 3 / 4, such as 1 / 4, 1 / 3, 1 / 2, 3 / 5, 2 / 3, 3 / 4, etc. Through the above structural design, the utility model can avoid the ratio of the height H1 of the first adhesive layer 310 being too large, thereby leaving enough space on the side surface of the battery row 210 not to be covered by the first adhesive layer 310, so as to take into account a certain heat dissipation capacity. At the same time, the utility model can avoid the ratio of the height H1 of the first adhesive layer 310 being too small and resulting in insufficient bonding and fixing effect. In some embodiments, the ratio of the height H1 of the first adhesive layer 310 in the height H2 of the single cell 211 can also be less than 1 / 4, or can be greater than 3 / 4, such as 1 / 5, 4 / 5, 1, etc., and is not limited to this embodiment.

[0048] AsFigure 2 As shown, in an embodiment of the present utility model, the ratio of the height H1 of the first adhesive layer 310 along the third direction Z to the thickness D1 of the first adhesive layer 310 along the fourth direction X can be 9 to 200, such as 9, 10, 20, 50, 100, 200, etc. Through the above structural design, the present utility model can avoid the insufficient bonding and fixing effect caused by the thickness D1 of the first adhesive layer 310 being too small compared to its height H1, and at the same time can avoid the waste of materials and occupation of space caused by the thickness D1 of the first adhesive layer 310 being too large compared to its height H1. In some embodiments, the ratio of the height H1 of the first adhesive layer 310 along the third direction Z to the thickness D1 of the first adhesive layer 310 along the fourth direction X can also be less than 9, or greater than 200, such as 8.5, 201, etc., and is not limited to this embodiment.

[0049] As Figure 2 shown, in an embodiment of the present utility model, along the fourth direction X, the thickness D1 of the first adhesive layer 310 can be 0.5 mm to 2.5 mm, such as 0.5 mm, 0.7 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, etc. Through the above structural design, the present utility model can avoid the waste of adhesive materials caused by the thickness D1 of the first adhesive layer 310 being too thick. At the same time, the present utility model can avoid the thickness D1 of the first adhesive layer 310 being too thin. Since the thinner the thickness D1 of the first adhesive layer 310, the poorer the bonding and fixing strength, the present utility model can ensure that the first adhesive layer 310 provides better bonding and fixing strength for at least two single cells 211 of the same battery row 210. In addition, in other embodiments of the present utility model, such as Figure 3 and Figure 4 the embodiments shown, when the first adhesive layer 310 is disposed between two adjacent battery rows 210, if the thickness D1 of the first adhesive layer 310 is too thin, it will also cause insufficient bonding and fixing strength provided by the first adhesive layer 310 for the two adjacent battery rows 210. Based on this, with the above design of the thickness D1 of the first adhesive layer 310, the present utility model can also make the first adhesive layer 310 provide better bonding and fixing strength for the two adjacent battery rows 210 when the first adhesive layer 310 is disposed between two adjacent battery rows 210. For another example, Figure 5 and Figure 6 the embodiments shown, when a heat insulation pad 220 is disposed between two adjacent battery rows 210, if the thickness D1 of the first adhesive layer 310 is too thin, it will also cause the thickness of the heat insulation pad 220 to be designed to be too thin. Based on this, with the above design of the thickness D1 of the first adhesive layer 310, the present utility model can also ensure that the heat insulation pad 220 provides better heat insulation effect when the heat insulation pad 220 is disposed. In some embodiments, the thickness D1 of the first adhesive layer 310 can also be less than 0.5 mm, or greater than 2.5 mm, such as 0.49 mm, 2.55 mm, etc., and is not limited to this embodiment.

[0050] As Figure 4 shown, in an embodiment of the present utility model, the battery box body 100 at least includes a bottom plate 110 and a frame. The ratio of the thickness D2 of the bottom plate to the thickness D1 of the first adhesive layer 310 in the fourth direction X may be 1.33 to 12, such as 1.33, 1.5, 2, 5, 10, 12, etc. In some embodiments, the ratio of the thickness D2 of the bottom plate to the thickness D1 of the first adhesive layer 310 may also be less than 1.33, or may be greater than 12, such as 1.32, 12.1, etc., and is not limited to this embodiment.

[0051] It should be noted that since the battery pack proposed by the present utility model uses a battery box body 100 formed by rolling processing, that is, a rolling device is used to roll process a plate, so that the plate is bent to form a box-like structure. For example, the bottom plate 110 and the frame 120 shown in the attached drawings can be understood as being integrally formed by rolling processing of the above-mentioned plate. When not considering the change in the thickness of the plate during the processing (such as the thickness change at the bending corner of the plate, etc.), the thickness of each part of the battery box body 100 (such as the bottom plate 110 and the frame 120) can be approximately regarded as equal, and the thickness D2 is marked on the bottom plate 110 in the attached drawings. Of course, when the battery box body 100 is formed by rolling, the thickness of the bottom plate 110 and the frame 120 of the battery box body 100 may also be different. At this time, the above-mentioned thickness D2 specifically refers to the thickness of the bottom plate 110 in the third direction Z, rather than the thickness of the frame 120. In addition, the battery box body 100 may also include several structures that are not formed by the rolling process, such as Figure 3 and Figure 4 the internal beam 130 shown in, which can be arranged in the main structure after the plate is roll-processed into the main structure of the battery box body 100 by means of welding, connecting with connectors, splicing, etc.

[0052] Referring to Figure 3 and Figure 4 , Figure 3 representatively shows a three-dimensional structural schematic diagram of a battery pack that can embody the principle of the present utility model in another exemplary embodiment; Figure 4 representatively shows Figure 3 a partial cross-sectional schematic diagram of, and the cross-section is a plane parallel to the above-mentioned reference plane.

[0053] As Figure 3 and Figure 4As shown, in an embodiment of the present utility model, the battery pack 200 includes at least two battery rows 210 arranged along the fourth direction X. For example, but not limited to, each battery pack 200 shown in the drawings includes two battery rows 210. On this basis, the first adhesive layer 310 is disposed between two adjacent battery rows 210, specifically, between the individual cells 211 of two adjacent battery rows 210. The first adhesive layer 310 is used to bond the opposite sides of two battery rows 210 in the fourth direction X. At least two individual cells 211 belonging to one battery row 210 are bonded and fixed via the first adhesive layer 310. Through the above structural design, the present utility model can use one first adhesive layer 310 to simultaneously achieve the bonding and fixing of the individual cells 211 on the sides of two adjacent battery rows 210, while improving the overall shear resistance of the battery pack 200, and also simplifying the structural complexity and reducing the raw material cost.

[0054] Refer to Figure 5 and Figure 6 , Figure 5 FIG. shows a partial cross-sectional view of a battery pack that can embody the principle of the present utility model in another exemplary embodiment, and the cross-section is a plane parallel to the above-mentioned reference plane; Figure 6 FIG. representatively shows Figure 5 an enlarged view of part A in

[0055] As Figure 5 and Figure 6 shown, in an embodiment of the present utility model, the battery pack 200 may further include a heat insulation pad 220. The heat insulation pad 220 is disposed between two adjacent battery rows 210 belonging to the same battery pack 200, and both sides of the heat insulation pad 220 are adhesively fixed to the sides of the two adjacent battery rows 210 via the second adhesive layer 221. The heat insulation pad 220 is located on the side of the first adhesive layer 310 away from the bottom plate 110 of the battery box 100. Through the above structural design, the present utility model can use the heat insulation pad 220 to provide a heat insulation function between the individual cells 211 of adjacent battery rows 210, further improving the thermal performance of the battery pack. On this basis, since the first adhesive layer 310 is located between the heat insulation pad 220 and the bottom plate 110 of the battery box 100, the first adhesive layer 310 can be used to play the role of a heat exchange channel (for example, the first adhesive layer 310 can adopt a thermally conductive structural adhesive), further improving the heat exchange effect of the battery pack 200.

[0056] As Figure 5As shown, based on the structural design of the battery pack 200 including the heat insulation pad 220, along the third direction Z, the proportion of the height H1 of the first adhesive layer 310 in the height H2 of the single battery 211 can be 1 / 4 to 3 / 4, such as 1 / 4, 1 / 3, 1 / 2, 3 / 5, 2 / 3, 3 / 4, etc. Through the above structural design, the present utility model can avoid the situation where the proportion of the height H1 of the first adhesive layer 310 is too large, and accordingly can provide sufficient space between two adjacent battery columns 210 to arrange the heat insulation pad 220, ensuring a better heat insulation effect. At the same time, the present utility model can avoid the situation where the proportion of the height H1 of the first adhesive layer 310 is too small, resulting in insufficient bonding and fixing effect. In some embodiments, the proportion of the height H1 of the first adhesive layer 310 in the height H2 of the single battery 211 can also be less than 1 / 4, or can be greater than 3 / 4, such as 1 / 5, 4 / 5, etc., and is not limited to this embodiment.

[0057] It should be noted that for the design of the height relationship between the first adhesive layer 310 and the single battery 211, it is because the heat insulation pad 220 is provided in this embodiment, and the heat insulation pad 220 and the first adhesive layer 310 are arranged along the third direction Z, which determines that the height H1 of the first adhesive layer 310 cannot exceed the height H2 of the single battery 211. It should be understood that in other embodiments of the present utility model, for example Figure 4 In the embodiment shown, when the heat insulation pad 220 is not provided between the adjacent battery columns 210, the height H1 of the first adhesive layer 310 can also be equal to the height H2 of the single battery 211, that is, the first adhesive layer 310 can fill the gap between the adjacent battery columns 210 in the third direction Z. Of course, in an embodiment not illustrated in the present utility model, when the heat insulation pad 220 is not provided between the adjacent battery columns 210, the height H1 of the first adhesive layer 310 can also be less than the height H2 of the single battery 211, and is not limited to the above embodiments.

[0058] Referring to Figure 7 , Figure 7 FIG. shows a partial cross-sectional view of a battery pack that can embody the principle of the present utility model in another exemplary embodiment, and the cross-section is a plane parallel to the above reference plane.

[0059] As Figure 7 shown, in an embodiment of the present utility model, the battery box 100 includes a beam structure, and the beam structure is located on the side of the battery pack 200 along the fourth direction X. On this basis, a third adhesive layer 320 can be provided between the beam structure and the battery pack 200, and the beam structure and the battery pack 200 are bonded and fixed via the third adhesive layer 320. Through the above structural design, the present utility model can further improve the fixing strength between the battery pack 200 and the battery box 100.

[0060] It should be noted that the beam structure of the battery box body 100 at least includes a frame 120 and internal beams 130. For example, the frame 120 can be understood as an integral structure with the bottom plate 110, that is, processed by a rolling process. The internal beams 130 can be connected to the bottom plate 110 in other ways and are located inside the battery box body 100. They can be used to separate different battery packs 200 and can also be used for the arrangement of other components, etc. On this basis, in Figure 7 In the illustrated embodiment, the example is given that a third adhesive layer 320 is provided between the battery pack 200 and the internal beam 130. It should be understood that in various possible embodiments that conform to the design concept of the present invention, the third adhesive layer 320 can also be provided between the battery pack 200 and the frame 120. Of course, it can also be provided between one side of the battery pack 200 and the frame 120 and between the other side of the battery pack 200 and the internal beam 130 at the same time, and is not limited to the above embodiment.

[0061] As Figure 7 shown, based on the structural design of the third adhesive layer 320, in an embodiment of the present invention, the height H3 of the third adhesive layer 320 can be 3 mm to 10 mm, such as 3 mm, 4 mm, 6 mm, 8 mm, 10 mm, etc. Through the above structural design, the present invention can avoid the insufficient bonding and fixing effect caused by the too low height H3 of the third adhesive layer 320, and at the same time can avoid the waste of adhesive materials caused by the too high height H3 of the third adhesive layer 320.

[0062] As Figure 7 shown, based on the structural design of the third adhesive layer 320, in an embodiment of the present invention, the height H1 of the first adhesive layer 310 can be higher than the height H3 of the third adhesive layer 320. In addition, in another embodiment of the present invention, for example Figure 10 in the illustrated embodiment, when the designs of the third adhesive layer 320 and the heat insulation pad 220 are adopted at the same time, the height H1 of the first adhesive layer 310 can still be higher than the height H3 of the third adhesive layer 320.

[0063] Refer to Figure 8 and Figure 9 , Figure 8 which representatively show a partial cross-sectional view of a battery pack that can embody the principle of the present invention in another exemplary embodiment, and the cross-section is a plane parallel to the above reference plane; Figure 9 which representatively shows Figure 8 an enlarged view of part B in

[0064] As Figure 8 and Figure 9As shown, in an embodiment of the present utility model, the battery pack 200 may be provided with a reinforcing member 230. For a battery pack 200, the reinforcing member 230 is located at the shoulder 201 on the side of the battery pack 200 that is farthest from other battery packs 200 in the fourth direction X. Among them, a recessed portion is provided in the area of the reinforcing member 230 facing the battery pack 200. This recessed portion is used to accommodate the shoulder 201 of the battery row 210, and the recessed portion and the shoulder 201 are adhesively fixed via the fourth adhesive layer 232. In other words, the battery pack 200 adhesively fixes the reinforcing member 230 to the shoulders 201 of at least two single cells 211 of a battery row 210 at the same time. Through the above structural design, the present utility model can use the reinforcing member 230 to provide protection for the shoulders 201 of the battery row 210 at the edge position of the battery pack 200, and at the same time can further strengthen the connection strength of each single cell 211 in the battery row 210.

[0065] As Figure 9 shown, based on the structural design of the reinforcing member 230, in an embodiment of the present utility model, a glue receiving groove 231 may be provided on the surface of the recessed portion of the reinforcing member 230. This glue receiving groove 231 is used to accommodate the fourth adhesive layer 232, and accordingly serves as a glue application and overflow area. Further, the glue receiving groove 231 may be provided in the area of the recessed portion corresponding to the side surface of the battery row 210, and of course, it may also be provided in the area of the recessed portion corresponding to the top surface of the battery row 210.

[0066] Referring Figure 10 , Figure 10 FIG. shows a partial cross-sectional view of a battery pack that can embody the principle of the present utility model in another exemplary embodiment. The cross-section is a plane parallel to the above-mentioned reference plane.

[0067] As Figure 10As shown, in an embodiment of the present utility model, a fifth adhesive layer 330 may be provided between the battery pack 200 and the bottom plate 110 of the battery box 100, and the battery pack 200 and the bottom plate 110 are adhesively fixed via the fifth adhesive layer 330. On this basis, the first adhesive layer 310 and the fifth adhesive layer 330 may be a thermally conductive structural adhesive of an integral structure. Through the above structural design, the present utility model can further improve the fixing strength between the battery pack 200 and the battery box 100, and at the same time facilitate the heat between adjacent battery rows 210 of the battery pack 200 to be transferred to the bottom plate 110 through the first adhesive layer 310 and the fifth adhesive layer 330 for heat exchange, which is beneficial to improving the heat exchange effect of the battery pack. In addition, when the first adhesive layer 310 and the fifth adhesive layer 330 are designed as an integral structure, it is convenient for the above two adhesive layers to be formed in the same process, which is beneficial to simplifying the process complexity. For example, each battery row 210 of the battery pack 200 can be assembled, glue can be applied on the bottom plate 110, and then the battery pack 200 can be assembled onto the bottom plate 110. During the assembly process, the battery pack 200 presses down on the adhesive material, so that part of the adhesive material enters the gap between adjacent battery rows 210 and flows upward, thereby forming the first adhesive layer 310 and the fifth adhesive layer 330 simultaneously.

[0068] It should be noted here that the battery packs shown in the drawings and described in this specification are only a few examples of the many battery packs that can adopt the principle of the present utility model. It should be clearly understood that the principle of the present utility model is by no means limited to any details or any components of the battery packs shown in the drawings or described in this specification.

[0069] In summary, the battery pack proposed by the present utility model includes a battery box 100, a battery pack 200, and a first adhesive layer 310; at least part of the battery box 100 is formed by a rolling process, and the rolling direction of the rolling process is the first direction W, and the first direction W defines a reference plane; the battery pack 200 includes at least one battery row 210, and the battery row 210 includes at least two single cells 211 arranged along the second direction Y, and the second direction Y is perpendicular to the reference plane; the first adhesive layer 310 is provided on the side of the battery row 210 to adhesively fix at least two single cells 211 belonging to one battery row 210. Through the above structural design, the present utility model uses the first adhesive layer 310 to adhesively fix each single cell 211 of the same battery row 210, thereby improving the overall shear resistance of the battery row 210. When the battery pack uses a battery box 100 formed by a rolling process, the present utility model can meet the higher requirements for the overall shear resistance of the battery pack due to the greater flexibility of such a battery box 100, which is beneficial to improving the module stiffness and effectively optimizing the system mode and strength.

[0070] Exemplary embodiments of the battery pack proposed by the present utility model have been described and / or illustrated in detail above. However, the embodiments of the present utility model are not limited to the specific embodiments described herein. On the contrary, the components and / or steps of each embodiment can be used independently and separately from the other components and / or steps described herein. Each component and / or each step of one embodiment can also be used in combination with the other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "a", "an", and "the above" etc. are used to indicate the existence of one or more elements / components / etc. The terms "comprising", "including", and "having" are used to mean an open inclusion and refer to the existence of additional elements / components / etc. in addition to the listed elements / components / etc. Furthermore, the terms "first", "second", etc. in the claims and the specification are only used as labels and are not numerical limitations on their objects.

[0071] Although the battery pack proposed by the present utility model has been described according to different specific embodiments, those skilled in the art will recognize that modifications can be made to the implementation of the present utility model within the spirit and scope of the claims.

Claims

1. A battery pack, characterized in that: include: The battery case is at least partially formed by a rolling process, and the rolling direction of the rolling process is a first direction, and the first direction defines a reference plane; A battery pack, disposed in the battery box and comprising at least one battery column, wherein the battery column comprises at least two single cells arranged along a second direction, wherein the second direction is perpendicular to the reference plane, and the height direction of the single cells is a third direction, wherein the third direction is parallel to the reference plane and perpendicular to the second direction; as well as The first adhesive layer is arranged on the side of the battery column in a fourth direction, the fourth direction is parallel to the reference plane and perpendicular to the third direction, and the first adhesive layer is used to bond and fix at least two single batteries belonging to the same battery column.

2. The battery pack according to claim 1, characterized in that: Along the third direction, the height of the first adhesive layer accounts for 1 / 4 to 3 / 4 of the height of the single battery; and / or A ratio of a height of the first adhesive layer along the third direction to a thickness of the first adhesive layer along the fourth direction is 9-200.

3. The battery pack according to claim 1, characterized in that: Along the fourth direction, the thickness of the first adhesive layer is 0.5 mm to 2.5 mm.

4. The battery pack according to claim 1, characterized in that: The battery box at least includes a bottom plate and a frame, and the ratio of the thickness of the bottom plate to the thickness of the first adhesive layer along the fourth direction is 1.33-12.

5. The battery pack according to claim 1, characterized in that: A fifth adhesive layer is provided between the battery pack and the bottom plate of the battery box, and the battery pack and the bottom plate are bonded and fixed via the fifth adhesive layer; wherein the first adhesive layer and the fifth adhesive layer are thermally conductive structural adhesives of an integrated structure.

6. The battery pack according to any one of claims 1 to 5, characterized in that: The battery pack includes at least two battery columns arranged along the fourth direction; wherein the first adhesive layer is disposed between two adjacent battery columns, and the first adhesive layer is used to simultaneously bond and fix the single cells of the two adjacent battery columns.

7. The battery pack according to claim 6, characterized in that: A heat insulating pad is also provided between two adjacent battery columns, and both sides of the heat insulating pad are respectively bonded and fixed to the sides of the two adjacent battery columns via a second adhesive layer. The heat insulating pad is located on a side of the first adhesive layer away from the bottom plate of the battery box.

8. The battery pack according to claim 6, characterized in that: The battery box includes a beam structure, and the beam structure is located on the side of the battery pack along the fourth direction; wherein a third adhesive layer is provided between the beam structure and the battery pack, and the beam structure and the battery pack are bonded and fixed via the third adhesive layer.

9. The battery pack according to claim 8, characterized in that: The height of the third adhesive layer is 3 mm to 10 mm.

10. The battery pack according to claim 8, characterized in that: The battery pack is provided with a reinforcement piece, which is located at the shoulder of the battery column located at the edgemost in the fourth direction and away from the other battery columns. The reinforcement piece is provided with a recessed portion in the area facing the battery pack, and the recessed portion is used to accommodate the shoulder. The recessed portion is bonded and fixed to the shoulder via a fourth adhesive layer.

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