CN219419290U - Battery pack - Google Patents

Abstract

The utility model discloses a battery pack, which comprises a box body main board, a plurality of brackets and a plurality of battery packs; each bracket is mounted on the box main board; each battery pack is installed on the bracket in a one-to-one correspondence; a gap is arranged between two adjacent brackets, pouring sealant is arranged in the gap, the pouring sealant fixedly bonds the two adjacent brackets, and the two adjacent brackets are fixedly bonded to the box body main board. The battery pack can realize the block management of the battery and improve the safety and stability of the battery.

Description

Battery pack

Technical Field

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

Background

With the development and progress of technology, the energy density of the battery pack is greatly improved, and accordingly, the stability requirement on battery installation is also higher and higher. In the prior art, in order to improve the heat dissipation efficiency while improving the battery energy density, the battery is subjected to modularized management, but meanwhile, the situation of relative motion exists between the battery modules, so that the internal stability of the battery is reduced, the existing practice is to splice two battery modules through the plug holes, but the design of the plug holes can only ensure the relative stability between the two battery modules, the stability between the battery modules and the battery box body cannot be well ensured, and potential safety hazards are brought.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model aims to provide a battery pack which can realize the block management of batteries and improve the stability of the batteries.

The utility model adopts the following technical scheme:

the battery pack is characterized by comprising a box body main board, a plurality of brackets and a plurality of battery packs; each bracket is mounted on the box main board; each battery pack is installed on the bracket in a one-to-one correspondence; a gap is arranged between two adjacent brackets, pouring sealant is arranged in the gap, the pouring sealant fixedly bonds the two adjacent brackets, and the two adjacent brackets are fixedly bonded to the box body main board.

Compared with the prior art, the utility model has the beneficial effects that:

the battery pack comprises a plurality of brackets and a plurality of battery packs, wherein each battery pack is installed on the bracket in a one-to-one correspondence manner, so that block management of a battery is realized, meanwhile, gaps are formed between two adjacent brackets, pouring sealant is poured into the gaps, the pouring sealant can adhere adjacent brackets and the brackets to a box main board, stability between the brackets and the box main board is improved, and therefore safety performance of the battery is improved.

Drawings

Fig. 1 is a schematic view of a part of the structure of a battery pack of the present utility model;

fig. 2 is a partially enlarged schematic view of an inner portion of the battery pack of the present utility model.

In the figure: 1. a bracket; 10. a gap; 100. a case main board; 11. a separation rib; 2. a single battery; 3. a liquid cooling plate; 30. a pipe; 4. and a heat insulation pad.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and detailed description below:

in the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

A battery pack, as shown in fig. 1-2, includes a case main board 100, a plurality of brackets 1, each of which is mounted on the case main board 100, and a plurality of battery packs, each of which is correspondingly mounted on a corresponding one of the brackets 1. A gap 10 is arranged between two adjacent brackets 1, pouring sealant is arranged in the gap 10, the two adjacent brackets 1 are fixedly bonded by the pouring sealant, and the pouring sealant can be bonded to the box main board 100 through the gap 10, so that the two adjacent brackets 1 can be fixedly bonded to the box main board 100.

On the basis of the above structure, during assembly, each battery pack is firstly installed on the bracket 1 in a one-to-one correspondence, then the bracket 1 is arranged from one end of the box body main board 100 to the other end, a gap 10 is reserved between two adjacent brackets 1, finally pouring a pouring sealant into the gap 10 between the two adjacent brackets 1, after the pouring sealant is solidified, the pouring sealant can fixedly bond the two adjacent brackets 1, and the two adjacent brackets 1 are fixedly bonded on the box body main board 100 together.

In this way, in the process of assembling or using the battery, each battery pack is provided with the corresponding bracket 1, when any battery pack has the problems of faults and the like, the corresponding bracket 1 and other brackets 1 can be separated for independent treatment, so that the time-consuming and labor-consuming investigation of the whole battery is avoided, and the block management of the battery is realized. And between the adjacent brackets 1, the brackets 1 and the box main board 100 are fixedly connected due to pouring sealant, so that relative movement between the adjacent brackets 1 and the box main board 100 is avoided, the inside of the battery is in a relatively stable state, and the service performance is improved.

Since manufacturing tolerances are inevitably generated in the process of machining the brackets 1, when the brackets 1 are mounted on the case main board 100, a gap must be formed between two adjacent brackets 1, and therefore, the gap 10 may be naturally formed by the manufacturing tolerances of two adjacent brackets 1, or the gap 10 may be reserved between two adjacent brackets 1 when the brackets 1 are mounted.

Further, in order to better manage the battery packs in blocks, each battery pack at least includes two rows of batteries, each row of batteries may include a plurality of single batteries 2, as shown in fig. 2, each battery pack of this embodiment includes two rows of batteries, which are respectively located at two sides of the bracket 1 after being mounted on the bracket 1, that is, each row of batteries has one side close to the gap 10, compared with the battery packs with more than two rows of single batteries 2, the two rows of single batteries 2 serve as the smallest management unit, when the plurality of single batteries 2 are mounted on the box main board 100, two rows of batteries are mounted on each bracket 1, and then the bracket 1 is assembled on the box main board 100, thereby facilitating assembly, replacement and maintenance of the later stages of batteries.

Further, since the mica sheet has good insulation high temperature resistance, even under the condition that the battery is in high temperature operation, the single battery 2 and the bracket 1 can be well insulated and protected. In the present embodiment, when the unit battery 2 is mounted to the bracket 1, the use of the mica sheet to adhesively fix the unit battery 2 and the bracket 1 can also improve the stability between the unit battery 2 and the bracket 1. At the time of assembly, the mica sheet may be adhered to the bracket 1 first, and then the battery pack may be adhered to the bracket 1.

In this embodiment, after the single battery 2 is bonded to the bracket 1 by adopting the mica sheet, the bracket 1 is mounted to the box main board 100, and finally the pouring sealant is poured into the gap 10, so that the pouring sealant overflows the gap 10 to infiltrate between the single battery 2 and the bracket 1, the bonding strength between the single battery 2 and the bracket 1 is further increased, and the stability of the battery structure is improved.

Further, as shown in fig. 2, on the basis of the above structure, the heat insulation pad 4 is clamped between two adjacent battery packs, specifically, the two sides of the heat insulation pad 4 are provided with adhesive layers, and the two adjacent battery packs are adhered to each other through the adhesive layers, so that the two adjacent battery packs are subjected to heat insulation protection, and unnecessary loss caused by direct influence on the adjacent battery packs when one of the battery packs is out of control due to heat is avoided. In addition, in the use process of the battery, the heat insulation pad 4 can also absorb vibration among the battery packs, plays a role in buffering, and improves safety and usability. It should be noted that, the heat insulation pad 4 of this embodiment may be made of materials such as ceramic fiber, which has a light weight and a good heat insulation effect, so as to avoid increasing the weight burden of the battery and reduce the heat insulation cost of the battery.

Further, the thermal management system plays an important role in the process of managing the battery in a blocking manner, if heat dissipation is uneven in each block area in the battery, a larger temperature difference between each row of batteries in the battery pack is formed, so that the whole service life, charge and discharge performance and safety performance of the battery are further affected, and as the liquid cooling has a higher heat exchange coefficient compared with air cooling and can be used for realizing uniform temperature, the liquid cooling plate 3 can be clamped between two adjacent rows of batteries in the battery pack, as shown in fig. 2, the liquid cooling plate 3 can absorb heat of the two adjacent rows of batteries, circulation cooling is realized, the temperatures of the two rows of batteries are uniform, and the battery pack is in a thermal balance state.

Further, since the batteries are subjected to block management, in order to ensure that the temperature between each battery pack is uniform, the liquid cooling plates 3 inside each battery pack can be connected in parallel through the pipeline 30, so that cooling liquid is input into the liquid cooling plates 3 through the pipeline 30, namely, after heat exchange is performed between two adjacent rows of batteries in the battery pack, the cooling liquid is output to the pipeline 30, and when the output cooling liquid is circulated again after being collected, the cooling liquid between each liquid cooling plate 3 is mutually circulated, so that the heat inside each battery pack is in a balance state. The two ends of the specific pipeline 30 are fixedly connected with the two liquid cooling plates 3 positioned at one end of the box main board 100 and farthest in distance, so that the relative stability between the liquid cooling plates 3 is ensured while cooling liquid is conveniently input and output to each liquid cooling plate 3, and the two liquid cooling plates complement each other with the battery block management and integrated compact structure.

In this embodiment, the gaps 10 between the brackets 1 may be rectangular, and compared with other structures, the rectangular processing technology is simple, and the bracket 1 is convenient to assemble, so that the efficiency of battery assembly is improved.

In some embodiments, in order to enhance stability between adjacent unit cells 2 and position the installation of the unit cells 2, a separation rib 11 may be further added between the unit cells 2 in each column of cells on the bracket 1, and the specific separation rib 11 may adapt to the surface shape of the unit cell 2, and increase the contact area to improve positioning accuracy and stability.

In order to adapt to the installation of the conductor bars in the battery, the gap 10 between two adjacent brackets 1 needs to meet a certain width. The conductive bars are installed at the ends of the adjacent two single batteries 2 in the adjacent two columns of batteries, which are far away from the brackets 1, and the installation requirements of the conductive bars corresponding to the gaps 10 between the adjacent two brackets 1 are that the gaps 10 meet 0.01-21mm. Because of the fluidity of the pouring sealant, the pouring sealant is poured into the gap 10 and meets the connection strength between the adjacent brackets 1 and between the brackets 1 and the box main board 100, the gap 10 is more than or equal to 0.01mm, but is limited by the installation space requirement of the conductive bars, if the gap 10 is more than 21mm, when the batteries vibrate, the adjacent two single batteries 2 in the adjacent two rows of batteries will pull, so that the connection failure of the conductive bars is caused, and the battery charge and discharge are further influenced, and therefore, the gap 10 meets 0.01-21mm, thereby ensuring the connection stability between the brackets 1 and the box main board 100 and ensuring the installation stability of the conductive bars.

The battery pack grouping flow of the utility model comprises the following steps: firstly tearing off release paper on two sides of the liquid cooling plate 3, then bonding two arranged batteries to two adhesive layers on two sides of the liquid cooling plate 3 to form a battery pack, secondly mounting the battery pack on the bracket 1 through mica sheets, and finally fixedly bonding the bracket 1 to the box body main board 100 to finish mounting the bracket 1 into a box, thereby finishing the assembly of the battery pack.

It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the utility model as defined in the appended claims.

Claims (10)

1. A battery pack, which is characterized by comprising a box main board (100), a plurality of brackets (1) and a plurality of battery packs; each bracket (1) is mounted on the box main board (100); each battery pack is arranged on the bracket (1) in a one-to-one correspondence manner; a gap (10) is formed between two adjacent brackets (1), pouring sealant is arranged in the gap (10), the two adjacent brackets (1) are fixedly bonded by the pouring sealant, and the two adjacent brackets (1) are fixedly bonded to the box body main board (100).

2. The battery pack according to claim 1, wherein the battery pack comprises at least two rows of cells, each row of cells comprising a plurality of unit cells (2), all the unit cells (2) in each row of cells being mounted on the bracket (1) at equal intervals.

3. Battery pack according to claim 2, characterized in that the cells (2) are bonded to the carrier (1) by means of mica sheets.

4. The battery pack according to claim 1, wherein a heat insulating mat (4) is interposed between adjacent two of the battery packs.

5. The battery pack according to claim 1, wherein a liquid cooling plate (3) is interposed between two adjacent rows of the cells of each of the battery packs.

6. The battery pack according to claim 5, wherein all the liquid cooling plates (3) are connected at their ends by a pipe (30).

7. The battery pack according to claim 6, wherein both ends of the pipe (30) are fixedly connected to two liquid cooling plates (3) located at the farthest distance from one end of the case main plate (100), respectively.

8. The battery pack according to claim 1, wherein the gap (10) is an elongated rectangle.

9. Battery pack according to claim 2, characterized in that the bracket (1) is provided with a separation rib (11), the separation rib (11) being arranged between two adjacent single batteries (2).

10. Battery pack according to any of claims 1-9, characterized in that the end of two adjacent rows of cells between two adjacent battery packs remote from the carrier (1) is connected with an electrically conductive row, which is arranged on two adjacent rows of cells in two adjacent battery packs and above the gap (10), which gap (10) fulfils 0.01-21mm.