CN219498010U - Battery pack box and battery pack - Google Patents

Abstract

The utility model provides a battery pack box body, which includes a lower box body, and the lower box body includes a bottom plate and a surrounding plate surrounding the bottom plate; a plurality of end parts for positioning and installing batteries are arranged and distributed on the bottom plate. The positioning part includes a plurality of limiting blocks and a cell end installation area surrounded by the plurality of limiting blocks. There is also provided a battery pack, including a battery cell and the battery pack case described in any one of the above, the end of the battery cell is installed in the installation area of the end of the battery cell and is limited by the limit block. bit fixed. In the solution of the utility model, the positioning part formed by the combination of the limit block is used to mechanically fix the battery cell, and the battery cell is easy to disassemble and assemble. When a part of the battery cell in the battery pack fails, it can Under certain circumstances, the faulty cells can be quickly and accurately replaced without replacing the entire pack, which improves the maintenance efficiency of the battery pack and reduces the maintenance cost of the battery pack.

Description

A battery pack case and battery pack

technical field

The utility model relates to the technical field of batteries, in particular to a battery pack box body and a battery pack.

Background technique

In the field of power batteries, there are two main ways to improve the cruising range of electric vehicles: the first way is to innovate the chemical system, such as increasing the Ni content of the positive electrode material, etc.; the second way is to innovate the structure of the battery cell, module or battery pack, such as the currently popular CTP module, blade battery, etc. As the market has higher and higher requirements for the cruising range of electric vehicles, CTP is an inevitable trend. CTP refers to Cell to Pack, which cancels the module structure and directly integrates the battery cells into a battery pack. Compared with the traditional module structure, the CTP structure can greatly save the module structural parts, improve the space utilization rate inside the battery pack, and then increase the energy density to achieve the purpose of increasing the cruising range of electric vehicles.

In the CTP structure, the battery cell is mainly fixed with the battery pack box by structural adhesive. When some cells in the battery pack fail and need to be replaced, due to the strong force Bonding, it is impossible to remove the problem cell smoothly without damaging other parts of the battery pack. Therefore, for the CTP structure, the maintenance of the battery cells inside the battery pack is a thorny issue. Since disassembly will inevitably damage other components in the battery pack and cause the entire pack to be scrapped, when the cells in the CTP battery pack fail, the current common practice in the industry is to replace the entire pack. If the faulty cell can be replaced accurately without damaging other parts of the battery pack, the maintenance cost will be greatly saved.

Utility model content

In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a battery pack box, the key of which is to include:

The lower box body includes a base plate and a coaming plate surrounding the base plate;

A plurality of positioning parts for positioning and installing one end of the battery cell are arranged and distributed on the bottom plate, and the positioning part includes a plurality of limiting blocks and a cell end installation area surrounded by a plurality of the limiting blocks .

Preferably, the battery pack box further includes a cover, the cover is arranged on the lower box and faces the bottom plate, and a plurality of batteries for positioning and installing are arranged and distributed on the cover. The positioning portion at the other end, the positioning portion on the cover body and the positioning portion on the bottom plate are provided in one-to-one correspondence.

Preferably, the limiting block includes an inner surface matched with the end of the battery cell, and an elastic layer is provided on the inner surface of the limiting block.

Preferably, the shape of the inner side of the limiting block and/or the shape of the elastic layer matches the shape of the corresponding side of the end of the battery cell.

Preferably, the limiting block is a limiting rib, the limiting rib protrudes from the bottom plate, and the height of the limiting rib is less than or equal to the height of the surrounding plate.

Preferably, the height of the limiting rib is 1-4mm.

Preferably, the thickness of the limiting rib is 1-8mm.

There is also provided a battery pack, the key of which is to include a battery cell and the battery pack case described in any one of the above, and the end of the battery cell is installed in the installation area of the battery cell end and passes through the limit The block is fixed in a limit.

Preferably, the exterior of the electric core is covered with a protective layer, and an exposed area is opened on the protective layer, the end of the electric core is at least partially exposed in the exposed area, and the end of the electric core is exposed in the exposed area. Part of the exposed area cooperates with the positioning portion.

Preferably, the end of the cell includes four corners for positioning, and each of the positioning parts includes at least two limiting blocks, wherein at least two of the limiting blocks correspond to the four corners. Two diagonal settings.

As mentioned above, a battery pack case and a battery pack of the present invention have at least the following beneficial effects: in the solution, the positioning part formed by the combination of the limit blocks is used to mechanically fix the battery cells, and the battery cells are easy to disassemble and assemble. When a partial cell in the pack fails, the faulty cell can be replaced quickly and accurately without damaging the cell and the battery pack structure, without replacing the entire pack, which improves the maintenance efficiency of the battery pack and reduces the The cost of repairing the battery pack.

Description of drawings

Fig. 1 is a schematic diagram of the lower box structure of a battery pack box shown in an exemplary embodiment of the present invention;

Fig. 2 is a schematic diagram of the assembly of the lower box and the cover in Fig. 1;

Fig. 3 is a schematic diagram of the assembly of a battery pack middle and lower box and battery cells shown in an exemplary embodiment of the present invention;

Fig. 4 is a schematic diagram of the assembly of the electric core and the limit block in the utility model;

Fig. 5 is a schematic diagram of the arrangement of the limiting blocks of the present invention;

Fig. 6 is another schematic diagram of arrangement of the limiting blocks of the present invention;

Fig. 7 is another schematic diagram of arrangement of the limiting blocks of the present invention;

Among them, 1-lower box body; 101-bottom plate; 102-coaming plate; 2-positioning part; 201-limiting block; 202-cell end installation area; 3-cover body; ; 6 - protective layer; 7 - exposed area.

Detailed ways

The implementation of the present utility model is described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The utility model can also be implemented or applied through other different specific implementation modes, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be understood that the preferred embodiments are only for illustrating the utility model, rather than limiting the protection scope of the utility model.

In the following description, numerous details are discussed in order to provide a more thorough explanation of embodiments of the present invention, however, it will be apparent to those skilled in the art that embodiments of the present invention can be practiced without these specific details. Indeed, in other embodiments, well-known structures and devices are shown in schematic diagrams rather than in detail in order to avoid obscuring the embodiments of the invention.

Fig. 1 is a schematic structural diagram of a battery pack box of the present invention. Please refer to accompanying drawing 1, a kind of battery pack box body, comprises lower box body 1, and described lower box body 1 comprises bottom plate 101 and surrounding plate 102 that surrounds described bottom plate 101; On described bottom plate 101 There are a plurality of positioning parts 2 arranged and distributed for positioning and installing one end of the electric core 4, and the positioning part 2 includes a plurality of limiting blocks 201 and an end installation of the battery core formed by a plurality of limiting blocks 201. District 202. In some embodiments, the battery pack case further includes a cover 3, and the cover 3 may be a case structure similar to that of the lower case 1, or may be a cover plate structure. The cover body 3 is disposed on the lower box body 1 and faces the bottom plate 101 . A plurality of positioning parts 2 for positioning and installing the other end of the electric core 4 are arranged and distributed on the cover body 3 , and the positioning parts 2 on the cover body 3 correspond to the positioning parts 2 on the bottom plate 101 one by one. set up.

In actual implementation, the positioning parts 2 are preferably arranged in a regular rectangular array on the bottom plate 101 , wherein the limiting blocks 201 between adjacent positioning parts 2 that are close together can be combined to form an integrated structure. During installation, multiple battery cells 4 are installed in the lower box body 1, and the corresponding ends of a single battery cell 4 are correspondingly installed in the corresponding battery end installation area 202, and the limit block 201 limits and fixes the ends of the battery cells 4 , like clamping claws to clamp and fix the end of the cell 4 . As shown in FIG. 2 , the cover body 3 is closed with the lower box body 1 , and the other end of the battery cell 4 is positioned and fixed with the positioning portion 2 on the cover body 3 .

In some embodiments, the limiting block 201 includes an inner surface that fits with the end of the battery cell 4 , and the inner surface of the limiting block 201 is provided with an elastic layer 5 . The elastic force of the elastic layer 5 can increase the frictional force between the elastic layer 5 and the electric core 4 , and at the same time reduce the accuracy requirements of the size of the limiting block 201 and the electric core 4 . In actual implementation, the elastic layer 5 can use elastic materials such as foam cotton.

In some embodiments, the shape of the inner surface of the limiting block 201 and/or the shape of the elastic layer 5 matches the shape of the corresponding side surface of the end of the battery core 4 . In the actual implementation process, the battery cell 4 can be cylindrical, square, etc., based on the shape of the end of the battery cell 4, the shape of the inner side of the limit block 201 and/or the shape of the elastic layer 5 is adapted to the end of the battery cell 4 The shape of the part, such as the L-shaped structure adapted to the square cell 4, or the arc-shaped structure adapted to the cylindrical cell 4, as long as a set of limit blocks 201 of the positioning part 2 can limit the lateral direction of the cell 4 on the surface of the bottom plate 101 Just move.

The limiting block 201 is a limiting rib protruding from the bottom plate 101 , and the height of the limiting rib is less than or equal to the height of the surrounding plate 102 . As shown in Figure 4, in the specific implementation process, as long as the height of the limiting rib does not exceed the height of the enclosure 102, the end of the battery cell 4 can be basically limited and fixed. In the case of saving material costs, The height of the limiting rib can be reduced as much as possible. According to the actual situation, the height H of the limiting rib can be 1-4mm. In addition, according to the actual installation space, under the premise of maintaining a certain strength of the limiting rib, the thickness T of the limiting rib may be 1-8mm. In this way, the limiting rib will not affect the height space utilization of the battery pack, nor will it affect the original water cooling design at the bottom of the battery pack. In terms of material, the limiting block 201 can be made of the same material as that of the lower box body 1 .

Fig. 3 is a schematic structural diagram of a battery pack of the present invention. Please refer to accompanying drawing 2, a kind of battery pack, comprises electric core 4 and described battery pack casing, and one end of described electric core 4 is installed one-to-one with the positioning part 2 of lower case 1, and cover body 3 and lower When the case body 1 is closed, the positioning portion of the cover body 3 positions and fixes the other end of the battery cell 4 . The end of the battery cell 4 is installed in the cell end installation area 202 and is limited and fixed by the limiting block 201. As shown in FIG. 4 , the exterior of the battery cell 4 is covered with A protective layer 6, such as an airgel layer, a foam cotton layer, etc., an exposed area 7 is opened on the protective layer 6, and the end of the electric core 4 is at least partially exposed in the exposed area 7, and the electric core 4 The part of the end exposed in the exposed area 7 cooperates with the positioning part 2 . In this way, the space utilization rate in the width direction of the battery cell 4 will not be affected by the limiting block 201 .

In some embodiments, the end of the electric core 4 includes four corners for positioning, and each positioning portion 2 includes at least two limiting blocks 201, wherein at least two of the limiting blocks 201 correspond to Two of the four corners are arranged diagonally. The following uses the square cell 4 and the stop block 201 adapted to the L-shaped structure as an example to illustrate: the cell end installation area 202 is adapted to the shape of the end of the cell 4 as a rectangle

As shown in Figure 5: the limit block 201 is arranged along the edge of the cell end installation area 202 in the middle, and is respectively arranged at the four corners of the cell end installation area 202, and the cell 4 is installed at the end of the cell After being inside the installation area 202 , the four limiting blocks 201 can limit the battery cell 4 in all directions.

As shown in FIG. 6 : on the basis of the embodiment shown in FIG. 5 , the setting of one limit block 201 can be reduced, and the three limit blocks 201 of L-shaped structure can also limit and fix the battery cell 4 .

As shown in Figure 7: on the basis of the embodiment shown in Figure 6, the two diagonal limit blocks 201 are reserved, and the remaining one limit block 201 is reduced, and the two L-shaped structure limit blocks 201 can also be used Limit and fix the cell 4.

The spacing between adjacent positioning parts 2 is adjusted according to the spacing requirements of the battery cells 4 in the actual situation. The adjacent limit blocks 201 of different positioning parts 2 can be set separately, and if they are close together, they can be integrally formed. .

The above-mentioned embodiments only illustrate the principles and effects of the present utility model, but are not intended to limit the present utility model. Anyone familiar with this technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by persons with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the utility model should still be covered by the claims of the utility model.

Claims (10)

1. A battery pack box, characterized in that it comprises: The lower box body includes a base plate and a coaming plate surrounding the base plate; A plurality of positioning parts for positioning and installing one end of the battery cell are arranged and distributed on the bottom plate, and the positioning part includes a plurality of limiting blocks and a cell end installation area surrounded by a plurality of the limiting blocks . 2. The battery pack box according to claim 1, further comprising a cover, the cover is arranged on the lower box and faces the bottom plate, and the covers are arranged and distributed There are a plurality of positioning parts for positioning and installing the other end of the battery cell, and the positioning parts on the cover body and the positioning parts on the bottom plate are provided in one-to-one correspondence. 3. The battery pack case according to claim 1 or 2, wherein the limiting block includes an inner surface that fits with the end of the battery cell, and an elastic layer is provided on the inner surface of the limiting block. 4. The battery pack case according to claim 3, wherein the shape of the inner side of the limiting block and/or the shape of the elastic layer matches the shape of the corresponding side of the end of the battery cell. 5. The battery pack box according to claim 1, wherein the limiting block is a limiting rib, and the limiting rib protrudes from the bottom plate, and the height of the limiting rib is less than or equal to the height of the enclosure. 6 . The battery pack case according to claim 5 , wherein the height of the limiting rib is 1-4 mm. 7. The battery pack case according to claim 5, wherein the thickness of the limiting rib is 1-8mm. 8. A battery pack, characterized in that it comprises a battery cell and the battery pack box according to any one of claims 1-7, the end of the battery cell is installed in the installation area of the end of the battery cell and Limiting and fixing are performed by the limiting block. 9. The battery pack according to claim 8, characterized in that: the exterior of the battery core is covered with a protective layer, and an exposed area is opened on the protective layer, and the end of the battery core is at least partially exposed on the said battery pack. The exposed area, the part of the end of the battery core exposed in the exposed area cooperates with the positioning part. 10. The battery pack according to claim 8, wherein the end of the cell includes four corners for positioning, and each positioning portion includes at least two stoppers, at least two of which are The limiting blocks are arranged corresponding to two opposite corners of the four corners.