Matching structure of grouped battery cell end plate and battery box end beam and battery pack

Abstract

The utility model provides a matching structure of a grouped battery cell end plate and a battery box end beam and a battery pack. The matching structure of the grouped battery cell end plates and the battery box end beam comprises the end beam, a first limiting part and a second limiting part, the end plate is provided with a first side and a second side which are oppositely arranged, the first side is configured to be connected with the battery cell, the second side is provided with a second limiting part, and the first limiting part and the second limiting part can be in limiting fit. According to the technical scheme of the utility model, the problem that the battery cell is easy to be degummed and the like when the CTP battery pack is under the working conditions of vibration, impact and the like is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a matching structure between the end plate of a grouped battery cell and the end beam of a battery box and a battery pack. Background Art

[0002] CTP (Cell To Pack) means a battery pack without a module. After the grouped battery cells of a CTP battery pack are put into the box, they are generally only adhesively connected to the box body through the bottom of the battery cells. In this way, when the CTP battery pack is under working conditions such as vibration and impact, the battery cells are extremely prone to risks such as debonding. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a matching structure between the end plate of a grouped battery cell and the end beam of a battery box and a battery pack to solve the problem that in the prior art, when the CTP battery pack is under working conditions such as vibration and impact, the battery cells are extremely prone to risks such as debonding.

[0004] To achieve the above purpose, the utility model provides a matching structure between the end plate of a grouped battery cell and the end beam of a battery box, including: an end beam, on which a first limiting part is provided; an end plate, having a first side and a second side arranged opposite to each other, the first side is configured to be connected to the battery cell, the second side is provided with a second limiting part, and the first limiting part and the second limiting part can be in limiting cooperation.

[0005] Through the above arrangement, compared with the prior art in which the grouped battery cells are only fixed in the battery box by adhesion and there is no other way to fix or limit the grouped battery cells, in the utility model, by additionally providing a limiting cooperation structure, that is, a first limiting part is provided on the end beam and a second limiting part is provided on the second side of the end plate. After the grouped battery cells of the CTP battery pack are loaded into the battery box, the first limiting part and the second limiting part can be in limiting cooperation, so as to achieve the function of fixing and limiting the grouped battery cells, and further avoid problems such as debonding at the bottom of the battery cells.

[0006] Further, one of the first limiting part and the second limiting part includes a limiting hole, and the other of the first limiting part and the second limiting part includes a rib.

[0007] Through the above arrangement, by making the limiting hole and the rib fit with each other, a fixation and limitation can be formed between the end plate of the grouped battery cells and the end beam of the battery box, thereby avoiding the debonding risk caused by the grouped battery cells of the CTP battery pack being only adhesively connected through the bottom of the battery cells.

[0008] Further, the first limiting part includes a limiting hole, the second limiting part includes a rib, and a guiding surface is provided on the side of the rib facing the bottom end of the end plate. From the bottom end to the top end of the end plate, the distance between the guiding surface and the end plate gradually increases.

[0009] With the above settings, on the one hand, the provision of limit holes on the end beam can achieve the lightweight of the battery box structure. On the other hand, by providing a guiding surface, during the process of pressing the grouped battery cells into the battery box, the guiding surface can play a guiding role, enabling the grouped battery cells to be more smoothly pressed into the battery box.

[0010] Furthermore, the limit holes are circular holes, and the convex ribs are hemispherical structures.

[0011] With the above settings, the circular holes and the hemispherical structures can be fitted together, and the arc surface of the hemispherical structure can play a guiding role, enabling the grouped battery cells to be more smoothly pressed into the battery box.

[0012] Furthermore, the first limiting part includes a plurality of limit holes, the second limiting part includes a plurality of convex ribs, and the plurality of limit holes and the plurality of convex ribs are correspondingly matched.

[0013] With the above settings, the fitting stability between the first limiting part and the second limiting part can be increased.

[0014] Furthermore, the bottom end of the end plate is provided with an inclined surface, the inclined surface is located on the second side of the end plate, and from the bottom end to the top end of the end plate, the distance between the inclined surface and the end beam gradually decreases.

[0015] With the above settings, the inclined surface can play a guiding role, making it easier and more convenient for the grouped battery cells to be loaded into the battery box through the box loading process.

[0016] Furthermore, a through groove is provided on the end beam, and the through groove penetrates the end beam along the length direction of the end beam.

[0017] With the above settings, the lightweight effect of the battery box can be achieved.

[0018] Furthermore, the through groove has a first side wall and a second side wall arranged oppositely, and at least one reinforcing rib is provided in the through groove. One end of the reinforcing rib is connected to the first side wall, and the other end of the reinforcing rib is connected to the second side wall.

[0019] With the above settings, while achieving lightweight, the strength of the end beam can be increased to reduce the deformation of the end beam.

[0020] According to another aspect of the present invention, the present invention provides a battery pack, including a battery box and grouped battery cells. The battery box includes an end beam, and the grouped battery cells include an end plate. The end beam and the end plate form a fitting structure, and the fitting structure is the fitting structure of the end plate of the grouped battery cells and the end beam of the battery box as described above.

[0021] Furthermore, the grouped battery cells further include battery cells, and two end plates are respectively bonded to both ends of the battery cells.

[0022] With the above settings, the component battery cells can be formed to facilitate the overall loading of the grouped battery cells into the box.

[0023] Applying the technical solution of the present utility model, compared with the prior art in which the grouped battery cells are only fixed in the battery box by bonding and there is no other way to fix or limit the grouped battery cells, in the present utility model, by additionally providing a limiting and cooperating structure, that is, a first limiting portion is provided on the end beam, and a second limiting portion is provided on the second side of the end plate. After the grouped battery cells of the CTP battery pack are loaded into the battery box, the first limiting portion and the second limiting portion can be in limiting cooperation, so as to achieve the function of fixing and limiting the grouped battery cells, and further avoid problems such as degumming at the bottom of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0025] Figure 1 The structural schematic diagram of the embodiment showing the matching structure of the end plate of the grouped battery cells and the end beam of the battery box of the present utility model;

[0026] Figure 2 Shows Figure 1 The sectional view of the matching structure of the end plate of the grouped battery cells and the end beam of the battery box in the A-A direction;

[0027] Figure 3 Shows Figure 1 The side view of the matching structure of the end plate of the grouped battery cells and the end beam of the battery box;

[0028] Figure 4 Shows Figure 1 The structural schematic diagram of the end beam of the matching structure of the end plate of the grouped battery cells and the end beam of the battery box;

[0029] Figure 5 Shows Figure 4 The side view of the end beam;

[0030] Figure 6 Shows Figure 1 The structural schematic diagram of the end plate of the matching structure of the end plate of the grouped battery cells and the end beam of the battery box; and

[0031] Figure 7 Shows Figure 6 The side view of the end plate.

[0032] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0033] 1, end beam; 2, end plate; 3, first limiting portion; 4, second limiting portion; 5, inclined surface; 6, second side; 7, first side; 8, through groove; 81, first side wall; 82, second side wall; 9, reinforcing rib. Detailed implementation manners

[0034] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0035] As Figures 1 to 7 shown, an embodiment of the present utility model provides a matching structure between a grouped battery cell end plate and a battery box end beam. The matching structure between the grouped battery cell end plate and the battery box end beam includes an end beam 1 and an end plate 2. Among them, a first limiting portion 3 is provided on the end beam 1; the end plate 2 has a first side 7 and a second side 6 which are oppositely arranged, the first side 7 is configured to be connected to the battery cells, a second limiting portion 4 is provided on the second side 6, and the first limiting portion 3 and the second limiting portion 4 can be in limiting cooperation.

[0036] In the above technical solution, compared with the prior art in which the grouped battery cells are only fixed in the battery box by bonding and there is no other way to fix or limit the grouped battery cells, in the present utility model, by additionally providing a limiting cooperation structure, that is, a first limiting portion 3 is provided on the end beam 1 and a second limiting portion 4 is provided on the second side 6 of the end plate 2. After the grouped battery cells of the CTP battery pack are installed in the battery box, the first limiting portion 3 and the second limiting portion 4 can be in limiting cooperation, so as to achieve the function of fixing and limiting the grouped battery cells, and further avoid problems such as degumming at the bottom of the battery cells.

[0037] Specifically, in the embodiment of the present utility model, the first side 7 of the end plate and the battery cells are connected to form grouped battery cells.

[0038] The implementation manners of the above limiting cooperation include but are not limited to clamping, fitting and other manners.

[0039] As Figure 2 and Figure 7 shown, in the embodiment of the present utility model, one of the first limiting portion 3 and the second limiting portion 4 includes a limiting hole, and the other of the first limiting portion 3 and the second limiting portion 4 includes a rib. In this way, by making the limiting hole and the rib fit with each other, a fixation and limitation can be formed between the end plate 2 of the grouped battery cells and the end beam 1 of the battery box, thereby avoiding the risk of degumming caused by the grouped battery cells of the CTP battery pack being connected only by gluing at the bottom of the battery cells.

[0040] As Figure 2 , Figure 3 , Figure 6 and Figure 7 shown, in the embodiment of the present utility model, the first limiting portion 3 includes a limiting hole, the second limiting portion 4 includes a rib, and a guiding surface is provided on one side of the rib facing the bottom end of the end plate 2, and the distance between the guiding surface and the end plate 2 gradually increases from the bottom end of the end plate 2 to the top end of the end plate 2.

[0041] With the above settings, on the one hand, the provision of the limiting holes on the end beam 1 can achieve the lightweight of the battery box structure. On the other hand, by setting the guiding surface, during the process of pressing the grouped battery cells into the battery box, the guiding surface can play a guiding role, enabling the grouped battery cells to be pressed into the battery box more smoothly.

[0042] It should be noted that in the embodiments of the present invention, the grouped battery cells are pressed into the battery box from top to bottom. The bottom end of the end plate 2 refers to Figure 3 the lower end of the end plate 2 in Figure 3 and the top end of the end plate 2 refers to

[0043] As Figure 2 and Figure 7 shown, in the embodiments of the present invention, the limiting holes are round holes and the convex ribs are hemispherical structures. In this way, the round holes and the hemispherical structures can be fitted, and the arc surface of the hemispherical structure can play a guiding role, enabling the grouped battery cells to be pressed into the battery box more smoothly.

[0044] It should be noted that in the embodiments of the present invention, the shapes of the limiting holes include but are not limited to round holes and square holes. Similarly, the shapes of the convex ribs include but are not limited to hemispherical shapes that fit with round holes and square shapes that fit with square holes, as long as the limiting holes and the convex ribs can be fitted together.

[0045] As Figure 4 and Figure 6 shown, in the embodiments of the present invention, the first limiting portion 3 includes a plurality of limiting holes, and the second limiting portion 4 includes a plurality of convex ribs. The plurality of limiting holes and the plurality of convex ribs are correspondingly matched. In this way, the fitting stability between the first limiting portion 3 and the second limiting portion 4 can be increased.

[0046] Preferably, in the embodiments of the present invention, the plurality of limiting holes are provided on the end beam 1. In this way, the weight of the end beam 1 is greatly reduced, achieving the lightweight effect of the battery box.

[0047] It should be noted that in the embodiments of the present invention, the positions, sizes and numbers of the round holes on the end beam 1 and the hemispherical convex ribs on the end plate 2 are completely corresponding. Therefore, after the grouped battery cells are completely installed in the battery box, the round holes on the end beam 1 and the hemispherical convex ribs on the end plate 2 can be fitted together, making the CTP battery pack grouped battery cells have, in addition to the adhesive connection between the bottom of the battery cells and the battery box, an additional snap connection between the end plate 2 and the end beam 1, avoiding the risk of adhesive failure at the bottom of the battery cells. At the same time, the round holes on the end beam 1 also achieve the lightweight effect of the battery box.

[0048] It should be noted that in the embodiments of the present utility model, the number of limiting holes and the number of convex ribs are not limited herein and can be set according to the experience and requirements of those skilled in the art.

[0049] Preferably, as Figure 2 shown, in the embodiments of the present utility model, a plurality of limiting holes are arranged at intervals in sequence along the length direction of the end beam 1, and the positions of the plurality of limiting holes in the height direction of the end beam 1 are not limited, that is, there are multiple rows of limiting holes on the end beam 1, the number of limiting holes in each row is one, and the multiple rows of limiting holes are arranged at intervals in sequence in the length direction of the end beam 1, and a plurality of convex ribs are arranged corresponding to the plurality of limiting holes. In this way, it is convenient to put the grouped battery cells into the box; for example, Figure 2 in, the plurality of limiting holes are arranged in a triangular shape.

[0050] In one embodiment, the plurality of limiting holes can also be arranged in rows and columns, and the arrangement manner of the plurality of limiting holes is not limited either.

[0051] As Figure 6 shown, in the embodiments of the present utility model, an inclined surface 5 is provided at the bottom end of the end plate 2, and the inclined surface 5 is located on the second side 6 of the end plate 2. From the bottom end to the top end of the end plate 2, the distance between the inclined surface 5 and the end beam 1 gradually decreases. In this way, the inclined surface 5 can play a guiding role, so that it is easier and more convenient to put the grouped battery cells into the battery box through the box loading process.

[0052] As Figure 3 shown, in the embodiments of the present utility model, a through groove 8 is provided on the end beam 1, and the through groove 8 penetrates the end beam 1 along the length direction of the end beam 1. In this way, the effect of lightening the weight of the battery box can be achieved.

[0053] It should be noted that in the embodiments of the present utility model, the length direction of the end beam 1 refers to Figure 2 the left - right direction in

[0054] As Figure 3 shown, in the embodiments of the present utility model, the through groove 8 has a first side wall 81 and a second side wall 82 which are oppositely arranged, and at least one reinforcing rib 9 is provided in the through groove 8. One end of the reinforcing rib 9 is connected to the first side wall 81, and the other end of the reinforcing rib 9 is connected to the second side wall 82. In this way, on the premise of achieving light weight, the strength of the end beam 1 can be increased to reduce the deformation of the end beam 1.

[0055] It should be noted that in the embodiments of the present utility model, the first side wall 81 and the second side wall 82 are arranged at intervals along the thickness direction of the end beam 1, that is, along Figure 3 the left - right direction in

[0056] An embodiment of the present utility model provides a battery pack, which includes a battery box and a grouped battery cell. The battery box includes end beams 1, and the grouped battery cell includes end plates 2. The end beams 1 and the end plates 2 form a matching structure, and the matching structure is the matching structure between the end plate of the grouped battery cell and the end beam of the battery box as described above.

[0057] Specifically, in the embodiment of the present utility model, the battery box includes two end beams 1, a bottom plate, a top plate, and two side plates. The two end beams 1 and the two side plates are both located between the top plate and the bottom plate, and are both connected to the bottom plate and the top plate. The two side plates are located between the two end beams 1, and both ends of each end beam 1 are connected to the two side plates respectively to enclose the battery box.

[0058] Specifically, in the embodiment of the present utility model, there are two end plates 2. The grouped battery cell further includes battery cells, and the two end plates 2 are respectively bonded to both ends of the battery cells. Among them, the first side 7 of each end plate 2 is a plane and is bonded to the battery cell. The grouped battery cell is installed inside the battery box, and the bottom of the battery cell is bonded to the bottom plate of the battery box. The two end plates 2 and the two end beams 1 are arranged correspondingly.

[0059] The above battery pack has all the advantages of the above-mentioned matching structure between the end plate of the grouped battery cell and the end beam of the battery box, which will not be elaborated here.

[0060] It should be noted that the battery pack in the embodiment of the present utility model can be a CTP battery pack or other battery packs.

[0061] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: Compared with the prior art in which the grouped battery cell is only fixed in the battery box by bonding and there is no other way to fix or limit the grouped battery cell, in the present utility model, by additionally providing a limiting and matching structure, that is, the first limiting part is provided on the end beam, and the second limiting part is provided on the second side of the end plate. After the grouped battery cell of the CTP battery pack is installed in the battery box, the first limiting part and the second limiting part can be in limiting cooperation, so as to achieve the function of fixing and limiting the grouped battery cell, and further avoid problems such as degumming at the bottom of the battery cell.

[0062] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, 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 "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0063] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0064] For the sake of convenience of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used here to describe the spatial positional relationship of a device or feature shown in the drawings with other devices or features. It should be understood that the spatial relative terms are intended to cover different orientations in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding interpretations of the spatial relative descriptions used here will be made.

[0065] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0066] 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 do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order different from those illustrated or described here.

[0067] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A mating structure between a group of battery cell end plates and a battery box end beam, characterized in that, Comprising: End beam (1), on which a first limiting part (3) is provided; End plate (2), having a first side (7) and a second side (6) arranged oppositely, the first side (7) is configured to be connected to the battery cell, a second limiting part (4) is provided on the second side (6), and the first limiting part (3) and the second limiting part (4) can be in limiting cooperation.

2. The mating structure of the grouped battery cell end plates and the battery box end beams according to claim 1, wherein, One of the first limiting part (3) and the second limiting part (4) includes a limiting hole, and the other of the first limiting part (3) and the second limiting part (4) includes a rib.

3. The mating structure of the grouped battery cell end plates and the battery box end beams according to claim 2, characterized in that, The first limiting part (3) includes the limiting hole, the second limiting part (4) includes the rib, and a guiding surface is provided on a side of the rib facing the bottom end of the end plate (2), and from the bottom end to the top end of the end plate (2), the distance between the guiding surface and the end plate (2) gradually increases.

4. The matching structure of the grouped battery cell end plate and the battery box end beam according to claim 3, characterized in that: The limiting hole is a round hole, and the rib is a hemispherical structure.

5. The mating structure of the grouped battery cell end plates and the battery box end beams according to any one of claims 1 to 4, characterized in that, The first limiting part (3) includes a plurality of limiting holes, the second limiting part (4) includes a plurality of ribs, and the plurality of limiting holes and the plurality of ribs are correspondingly matched.

6. The mating structure of the grouped battery cell end plates and the battery box end beams according to any one of claims 1 to 4, characterized in that, An inclined surface (5) is provided at the bottom end of the end plate (2), the inclined surface (5) is located on the second side (6) of the end plate (2), and from the bottom end to the top end of the end plate (2), the distance between the inclined surface (5) and the end beam (1) gradually decreases.

7. The mating structure of the grouped battery cell end plates and the battery box end beams according to any one of claims 1 to 4, characterized in that, A through groove (8) is provided on the end beam (1), and the through groove (8) penetrates the end beam (1) along the length direction of the end beam (1).

8. The matching structure of the grouped battery cell end plate and the battery box end beam according to claim 7, characterized in that: The through groove (8) has a first side wall (81) and a second side wall (82) arranged oppositely, at least one reinforcing rib (9) is provided in the through groove (8), one end of the reinforcing rib (9) is connected to the first side wall (81), and the other end of the reinforcing rib (9) is connected to the second side wall (82).

9. A battery pack, characterized in that, Comprising a battery box and a grouped battery cell, the battery box includes an end beam (1), the grouped battery cell includes an end plate (2), the end beam (1) and the end plate (2) form a matching structure, and the matching structure is the matching structure of the end plate of the grouped battery cell and the end beam of the battery box according to any one of claims 1 to 8.

10. The battery pack according to claim 9, characterized in that: There are two end plates (2), the grouped battery cell further includes battery cells, and the two end plates (2) are respectively bonded to both ends of the battery cells.

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