Battery box body and battery pack

Abstract

The utility model discloses a battery box body and a battery pack. A battery box comprises a main body, a partition plate and a bearing plate. A first mounting part is arranged on the inner side wall of the main body; a containing cavity is formed in the main body. The accommodating cavity is used for accommodating a battery cell stack body; the side, facing the inner side wall of the body, of the partition plate is provided with a second installation part. The bearing plate is arranged in the accommodating cavity and is used for bearing the battery cell stacking body; a third mounting part is arranged at one end of the bearing plate, and a fourth mounting part is arranged at the other end. The third mounting part is mounted on the first mounting part, and the fourth mounting part is mounted on the second mounting part. According to the battery box body, the number of battery cell layers of the battery cell stacking body can be reduced, so that the difference of pre-tightening force between the battery cells is reduced, and the weight borne by the bottom-layer battery cell is reduced. The battery box does not need to be additionally provided with a battery module, the utilization space in the battery pack can be increased, and the manufacturing cost of the battery pack is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of battery equipment, and in particular to a battery box and battery pack. Background Technology

[0002] Battery cells are generally classified into three main categories: prismatic, pouch, and cylindrical. Among them, pouch cells have advantages such as high energy density and light weight. Pouch cells are stacked in two ways: upright or flat. The stacking of pouch cells requires preload. The more layers of flat-lying pouch cells are stacked, the greater the difference in preload between the upper and lower layers, and the heavier the weight of the uppermost cells is borne by the bottom layer, thus affecting the cycle life of the entire cell.

[0003] In related technologies, battery modules are used to address the weight issue of multi-layered stacked cells. However, the entire battery industry is currently moving towards higher integration, and battery module designs are gradually being phased out, with a shift towards more integrated module-less designs. This is because battery modules occupy a large amount of space, leading to low space utilization in the battery pack, and they also increase the overall manufacturing cost of the battery pack. Utility Model Content

[0004] The main purpose of this utility model is to provide a battery box and battery pack, which aims to solve the technical problems that the battery module occupies a large space, resulting in low space utilization of the battery pack, and the battery module will increase the manufacturing cost of the entire battery pack.

[0005] In order to achieve the above-mentioned utility model objectives, the first aspect of this utility model proposes a battery box.

[0006] A battery housing, comprising:

[0007] The main body has a receiving cavity inside, which is used to receive the battery cell stack, and a first mounting part is provided on the inner side wall of the main body;

[0008] A partition is disposed within the receiving cavity, and a second mounting portion is provided on the side of the partition facing the inner wall of the main body;

[0009] A support plate is disposed within the receiving cavity and is used to support the battery cell stack. One end of the support plate is provided with a third mounting part, and the other end is provided with a fourth mounting part. The third mounting part is mounted on the first mounting part, and the fourth mounting part is mounted on the second mounting part.

[0010] In one embodiment, the third mounting portion is detachably mounted to the first mounting portion.

[0011] In one embodiment, the first mounting part is a first mounting groove, and the third mounting part is engaged in the first mounting groove.

[0012] In one embodiment, the first mounting groove is inclined upward along the vertical direction of the main body, and the third mounting part is bent toward the first mounting groove, wherein the inclination angle of the first mounting groove is adapted to the bending angle of the third mounting part.

[0013] In one embodiment, a first guide cavity is provided above the first mounting groove, the first guide cavity is connected to the first mounting groove, and the inner diameter of the first guide cavity gradually increases along the direction close to the first mounting groove.

[0014] In one embodiment, the battery housing includes:

[0015] The fourth mounting part is detachably mounted to the second mounting part; and / or

[0016] The second mounting part is a second mounting groove, and the fourth mounting part is engaged within the second mounting groove; and / or

[0017] Along the vertical direction of the main body, the second mounting groove is inclined upwards, and the fourth mounting part is bent toward the second mounting groove, the inclination angle of the second mounting groove matching the bending angle of the fourth mounting part; and / or

[0018] A second guide cavity is provided above the second mounting groove. The second guide cavity is connected to the second mounting groove, and the inner diameter of the second guide cavity gradually increases along the direction close to the second mounting groove.

[0019] In one embodiment, the support plate is provided as a plurality of plates, which are arranged at intervals along the vertical direction within the receiving cavity.

[0020] In one embodiment, the battery housing includes a first fixing seat and a second fixing seat disposed opposite to each other. The first fixing seat is disposed on the inner side wall of the main body, and the second fixing seat is disposed on the inner side wall of the partition facing the main body. The first fixing seat and the second fixing seat together fix the battery cell stack.

[0021] In one embodiment, the partitions are provided in a plurality of manner, which divide the body into a plurality of the receiving cavities.

[0022] The second aspect of this utility model provides a battery pack, including a cell stack and the aforementioned battery housing, wherein the cell stack is disposed within the battery housing.

[0023] Beneficial effects:

[0024] This utility model discloses a battery housing with a third mounting portion at one end and a fourth mounting portion at the other end of a support plate. The third mounting portion is mounted on a first mounting portion, and the fourth mounting portion is mounted on a second mounting portion. That is, the support plate is positioned between the main body and the partition plate. The support plate supports the battery cell stack, reducing the number of cell layers in the stack, thereby reducing the difference in preload between the cells and lightening the weight load on the bottom cells. This battery housing eliminates the need for additional battery modules, increasing the usable space within the battery pack and reducing its manufacturing cost. Attached Figure Description

[0025] Figure 1 This is a top view of a battery box according to an embodiment of the present invention.

[0026] Figure 2 yes Figure 1 Sectional view along the middle AA.

[0027] Figure 3 yes Figure 2 Partial structural diagram.

[0028] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0029] Figure 5 yes Figure 3 Enlarged view of point C in the middle.

[0030] Figure 6 yes Figure 3 Enlarged view of point D in the middle.

[0031] Figure 7 This is a schematic diagram of the structure of the support plate according to an embodiment of the present invention.

[0032] in:

[0033] 100. Main body; 110. Receiving cavity; 120. First mounting groove; 130. First guide cavity;

[0034] 200, partition; 210, second mounting groove; 220, second guide cavity;

[0035] 300. Support plate; 310. Third mounting part; 320. Fourth mounting part;

[0036] 410. First fixed seat; 420. Second fixed seat.

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0039] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] like Figures 1 to 3As shown, in some embodiments, a battery housing includes a main body 100, a separator 200, and a support plate 300. A receiving cavity 110 is provided within the main body 100. The receiving cavity 110 is used to receive a stack of battery cells. A first mounting portion is formed on the inner sidewall of the main body 100. The separator 200 is disposed within the receiving cavity 110, and a second mounting portion is provided on the side of the separator 200 facing the inner sidewall of the main body 100. The support plate 300 is disposed within the receiving cavity 110, and the support plate 300 is used to support the stack of battery cells. A third mounting portion 310 is provided at one end of the support plate 300, and a fourth mounting portion 320 is provided at the other end. The third mounting portion 310 is mounted on the first mounting portion, and the fourth mounting portion 320 is mounted on the second mounting portion.

[0043] It should be noted that the support plate 300 is disposed between the main body 100 and the separator 200. The support plate 300 is used to support the battery cell stack, reducing the number of battery cell layers in the stack, thereby reducing the difference in preload between the cells and reducing the weight borne by the bottom cells. This battery pack eliminates the need for additional battery modules, increasing the usable space within the battery pack and reducing manufacturing costs. Furthermore, the support plate 300 ensures that the foam between the cells can be pressed into preset positions for overall positioning.

[0044] In some embodiments, the body 100 may be assembled from multiple plates. Specifically, the body 100 may be rectangular.

[0045] The main body 100 forms the outer shell of the battery pack, protecting the internal structure. The main body 100 is made of high-strength materials to withstand the weight of the internal cell stacks and external impacts and pressures. Both the main body 100 and the separator 200 can be made of extruded aluminum, increasing the rigidity of the battery pack. Compared to stamped separators 200, there is also more space for the separator 200's fixing design. Utilizing the extrusion flow channels in the main body 100 and separator 200, the separator 200 can be installed without affecting the integration rate.

[0046] Specifically, the receiving cavity 110 can be a square cavity. The battery cells in the battery cell stack are horizontally arranged within the receiving cavity 110.

[0047] like Figure 1 As shown, in some embodiments, the partition 200 is arranged along the length of the body 100.

[0048] Specifically, the shape of the partition 200 matches the internal shape of the main body 100. The partition 200 can be a square plate.

[0049] Specifically, multiple separators 200 are configured. These separators 200 divide the main body 100 into multiple receiving cavities 110. This configuration improves the space utilization within the battery housing. The separators 200 can reduce the impact between stacked cells, thus reducing the risk of thermal runaway.

[0050] Specifically, the partition 200 can be a liquid cooling plate. The liquid cooling plate has cooling channels inside. The cooling channels are used to circulate coolant to dissipate heat from the cell stack.

[0051] like Figure 2 As shown, in some embodiments, the support plate 300 is horizontally disposed between the main body 100 and the partition plate 200 so that the support plate 300 can stably support the battery cell stack.

[0052] Specifically, the support plate 300 can be a rectangular plate, which facilitates the cooperation between the support plate 300 and the rectangular body 100 and the rectangular partition 200.

[0053] Specifically, the bearing plate 300 can be made of a high-strength and rigid metal material, enabling the bearing plate 300 to withstand greater weight and pressure.

[0054] In some embodiments, the third mounting portion 310 is detachably mounted to the first mounting portion. The fourth mounting portion 320 is detachably mounted to the second mounting portion. That is, the support plate 300 is detachably mounted between the main body 100 and the partition plate 200 to facilitate the installation of the cell stack.

[0055] In actual operation, the carrier plate 300 can be removed from the main body 100 and the separator 200 first, and then the cell stack can be placed in the receiving cavity 110. This avoids directly operating the cell stack in a narrow space, making the installation process more convenient and efficient. When a cell malfunctions or needs to be replaced, the carrier plate 300 can be removed from the main body 100 and the separator 200, and the cell stack can be taken out for repair or replacement without disassembling the entire battery box, saving repair time and reducing costs.

[0056] like Figure 4 and Figure 7 As shown, specifically, the first mounting part is the first mounting slot 120. The third mounting part 310 is engaged within the first mounting slot 120. The second mounting part is the second mounting slot 210. The fourth mounting part 320 is engaged within the second mounting slot 210.

[0057] The first mounting slot 120 provides a clear mounting position for the third mounting portion 310 of the support plate 300. When installing the support plate 300, the operator can quickly align the third mounting portion 310 with the first mounting slot 120 and insert it. The second mounting slot 210 provides a clear mounting position for the fourth mounting portion 320 of the support plate 300. When installing the support plate 300, the operator can quickly align the fourth mounting portion 320 with the second mounting slot 210 and insert it, achieving rapid positioning and installation of the support plate 300.

[0058] like Figure 5 As shown, specifically, along the vertical direction of the main body 100, the first mounting groove 120 is inclined upwards, and the third mounting part 310 is bent toward the first mounting groove 120, with the inclination angle of the first mounting groove 120 matching the bending angle of the third mounting part 310. Along the vertical direction of the main body 100, the second mounting groove 210 is inclined upwards, and the fourth mounting part 320 is bent toward the second mounting groove 210, with the inclination angle of the second mounting groove 210 matching the bending angle of the fourth mounting part 320. That is, the mounting angle of the first mounting groove 120 is the same as the mounting angle of the third mounting part 310. The mounting angle of the second mounting groove 210 is the same as the mounting angle of the fourth mounting part 320.

[0059] It should be noted that this structure provides fixation in both the horizontal and vertical directions, preventing the support plate 300 from loosening or falling off. When the support plate 300 is subjected to external force, the inclined first mounting groove 120 exerts a downward component force on the third mounting part 310, making the third mounting part 310 of the support plate 300 more firmly mounted on the housing. When the support plate 300 is subjected to external force, the inclined second mounting groove 210 exerts a downward component force on the fourth mounting part 320, making the fourth mounting part 320 of the support plate 300 more firmly mounted on the partition 200.

[0060] like Figure 4 and Figure 5 As shown, specifically, a first guide cavity 130 is provided above the first mounting groove 120. The first guide cavity 130 communicates with the first mounting groove 120, and the inner diameter of the first guide cavity 130 gradually increases in the direction close to the first mounting groove 120. The first guide cavity 130 is used to guide the third mounting part 310 into the first mounting groove 120. After the third mounting part 310 enters the second guide cavity 220, it gradually slides along the inner sidewall of the second guide cavity 220 into the first mounting groove 120. In actual operation, the length of the support plate 300 is adapted to the relative distance between the main body 100 and the partition 200. The first guide cavity 130 can provide clearance space for the support plate 300 during installation, so that the third mounting part 310 of the support plate 300 can smoothly enter the first mounting groove 120.

[0061] Specifically, the cross-sectional shape of the first guide cavity 130 can be a flared or conical shape.

[0062] like Figure 6 As shown, specifically, a second guide cavity 220 is provided above the second mounting groove 210. The second guide cavity 220 is connected to the second mounting groove 210, and the inner diameter of the second guide cavity 220 gradually increases along the direction close to the second mounting groove 210.

[0063] The second guide cavity 220 is used to guide the fourth mounting part 320 into the second mounting groove 210. After the fourth mounting part 320 enters the second guide cavity 220, it gradually slides along the inner wall of the guide cavity into the first mounting groove 120. In actual operation, the second guide cavity 220 can provide clearance space during the installation of the support plate 300, so that the fourth mounting part 320 of the support plate 300 can smoothly enter the second mounting groove 210.

[0064] Specifically, the cross-sectional shape of the second guide cavity 220 can be either a flared or conical shape.

[0065] In other embodiments, the third mounting part 310 can be detachably mounted to the first mounting part by means of bolt connection, quick clamp connection or magnetic connection, etc.

[0066] In other embodiments, the fourth mounting part 320 can be detachably mounted to the second mounting part by means of bolt connection, quick clamp connection or magnetic connection, etc.

[0067] In some embodiments, a plurality of support plates 300 are provided, and the plurality of support plates 300 are arranged at intervals in the accommodating cavity 110 along the vertical direction.

[0068] like Figure 1 and Figure 2 As shown, in some embodiments, the battery housing includes a first fixing seat 410 and a second fixing seat 420 disposed opposite to each other. The first fixing seat 410 is disposed on the inner side wall of the main body 100, and the second fixing seat 420 is disposed on the inner side wall of the partition 200 facing the main body 100. The first fixing seat 410 and the second fixing seat 420 together fix the battery cell stack.

[0069] In another embodiment, a battery pack includes a cell stack and the aforementioned battery housing, with the cell stack disposed within the battery housing.

[0070] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A battery housing, characterized in that, include: The main body has a receiving cavity inside, which is used to receive the battery cell stack, and a first mounting part is provided on the inner side wall of the main body; A partition is disposed within the receiving cavity, and a second mounting portion is provided on the side of the partition facing the inner wall of the main body; A support plate is disposed within the receiving cavity and is used to support the battery cell stack. One end of the support plate is provided with a third mounting part, and the other end is provided with a fourth mounting part. The third mounting part is mounted on the first mounting part, and the fourth mounting part is mounted on the second mounting part.

2. The battery housing according to claim 1, characterized in that, The third mounting part is detachably mounted on the first mounting part.

3. The battery housing according to claim 1, characterized in that, The first mounting part is a first mounting groove, and the third mounting part is engaged in the first mounting groove.

4. The battery housing according to claim 3, characterized in that, Along the vertical direction of the main body, the first mounting groove is inclined upward, and the third mounting part is bent toward the first mounting groove, with the inclination angle of the first mounting groove matching the bending angle of the third mounting part.

5. The battery housing according to claim 4, characterized in that, A first guide cavity is provided above the first mounting groove. The first guide cavity is connected to the first mounting groove, and the inner diameter of the first guide cavity gradually increases along the direction close to the first mounting groove.

6. The battery housing according to claim 1, characterized in that, The battery housing includes: the fourth mounting portion is detachably mounted to the second mounting portion; and / or The second mounting part is a second mounting groove, and the fourth mounting part is engaged within the second mounting groove; and / or Along the vertical direction of the main body, the second mounting groove is inclined upwards, and the fourth mounting part is bent toward the second mounting groove, the inclination angle of the second mounting groove matching the bending angle of the fourth mounting part; and / or A second guide cavity is provided above the second mounting groove. The second guide cavity is connected to the second mounting groove, and the inner diameter of the second guide cavity gradually increases along the direction close to the second mounting groove.

7. The battery housing according to claim 1, characterized in that, The support plate is configured as a plurality of plates, which are arranged at intervals along the vertical direction within the receiving cavity.

8. The battery housing according to claim 1, characterized in that, The battery housing includes a first fixing seat and a second fixing seat disposed opposite to each other. The first fixing seat is disposed on the inner side wall of the main body, and the second fixing seat is disposed on the inner side wall of the partition facing the main body. The first fixing seat and the second fixing seat together fix the battery cell stack.

9. The battery housing according to claim 1, characterized in that, The partition is configured as a plurality of partitions, which divide the main body into a plurality of receiving cavities.

10. A battery pack, characterized in that, It includes a cell stack and a battery housing as described in any one of claims 1 to 9, wherein the cell stack is disposed within the battery housing.

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