CN219610551U

CN219610551U - Battery system

Info

Publication number: CN219610551U
Application number: CN202320333852.7U
Authority: CN
Inventors: 戈志敏; 艾文文; 曹锡仪; 黄文杰; 廖昌江; 胡清峰; 何其艮; 陈相龙; 钟宇豪
Original assignee: Jiangxi Ganfeng Lienergy Technology Co Ltd
Current assignee: Jiangxi Ganfeng Lienergy Technology Co Ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-08-29
Anticipated expiration: 2033-02-28

Abstract

The utility model provides a battery system, which comprises a battery box, a liquid cooling plate and a battery cell stack, wherein the battery box is internally provided with the battery cell stack, the top end of the battery box is provided with the liquid cooling plate, the liquid cooling plate is positioned above the battery cell stack, heat conduction structural adhesive is arranged between the battery cell stack and the liquid cooling plate, a battery cell cavity is arranged in the battery box, and the battery cell stacks are all arranged in the battery cell cavity; according to the utility model, the top cover is replaced by the liquid cooling plate, so that the space utilization rate can be effectively improved on the premise of realizing heat dissipation and cooling and structural strength, the problem that the liquid cooling plate at the bottom end is easy to damage due to collision can be solved, and meanwhile, the heat conduction structural adhesive is arranged between the cell stack and the liquid cooling plate, so that the problem of low heat transfer efficiency in the battery box can be solved.

Description

Battery system

Technical Field

The utility model relates to the field of lithium ion batteries, in particular to a battery system.

Background

The secondary battery is also called a rechargeable battery or a storage battery, and is a battery which can be continuously used by activating active chemical substances in a charging mode after the battery is discharged, the chemical properties of the active chemical substances in the battery are active, and a single electric core in a battery box can generate heat in the use process, so that the interior of the battery box is easy to fire when the battery box is used in a high-temperature environment for a long time.

A liquid cooled power battery pack with a search publication number CN218351547U indicates: the embodiment of the utility model provides a liquid cooling power battery pack, and relates to the technical field of power batteries. The liquid cooling power battery pack comprises a box body, an electric core and a liquid cooling plate, wherein the box body comprises a bottom plate, the electric core is arranged on the bottom plate, and the liquid cooling plate is arranged on one side, far away from the bottom plate, of the electric core; be provided with the liquid cooling runner in the bottom plate, liquid cooling runner and liquid cooling board all are used for circulating the coolant liquid to cool off the bottom and the top of electric core respectively, it can satisfy the demand of electric core quick even cooling better, although can solve the purpose of cooling down the bottom and the top of electric core, but can't solve the bottom liquid cooling board and lead to the damaged problem of liquid cooling board easily because of colliding with, can't solve the problem that the battery box heat transfer is inefficiency simultaneously.

For this reason, we propose a battery system to solve the above-mentioned problems.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a battery system.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the battery system comprises a battery box, a liquid cooling plate and a battery cell stack, wherein the battery cell stack is arranged in the battery box, the liquid cooling plate is arranged at the top end of the battery box, the liquid cooling plate is positioned above the battery cell stack, and heat conduction structural adhesive is arranged between the battery cell stack and the liquid cooling plate.

Further preferably, a battery cell cavity is arranged in the battery box, and the battery cell stacks are all arranged in the battery cell cavity.

Further preferably, a partition plate is arranged between the electric core cavities, structural adhesive is arranged at the bottom end of the electric core stack, and the areas of the structural adhesive and the heat conduction structural adhesive are consistent with the cross sectional area of the electric core cavities.

Further preferably, the bottom of the battery box is uniformly provided with heat dissipation holes penetrating through the battery box, and the distances among the heat dissipation holes are uniform.

Further preferably, both ends of the cell stack are provided with side plates, and the side plates are symmetrically arranged with the cell stack as the center.

Further preferably, the liquid cooling plates are uniformly provided with cooling flow channels, and the liquid cooling plates and the battery box are fixed in a welding and bolt mode.

Further preferably, the side plates at one side of the cell stack are all in contact with the separation plates, and the separation plates are detachably arranged.

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

according to the utility model, the top cover is replaced by the liquid cooling plate, so that the space utilization rate can be effectively improved on the premise of realizing heat dissipation and cooling and structural strength, the problem that the liquid cooling plate at the bottom end is easy to damage due to collision can be solved, and meanwhile, the heat conduction structural adhesive is arranged between the cell stack and the liquid cooling plate, so that the problem of low heat transfer efficiency in the battery box can be solved.

Drawings

Fig. 1 is a schematic diagram of a battery system according to the present utility model;

fig. 2 is a schematic diagram of an explosion structure of a battery system according to the present utility model;

FIG. 3 is a schematic view of the cell stack of FIG. 2;

FIG. 4 is a schematic view of the internal structure of the battery box in FIG. 2;

fig. 5 is a schematic diagram of the liquid cooling structure in fig. 2.

In the figure: 1. a battery box; 2. a liquid cooling plate; 3. a heat conducting structural adhesive; 4. a cell stack; 5. structural adhesive; 6. a side plate; 7. a die cavity; 8. a heat radiation hole; 9. a partition plate; 10. and cooling the flow channel.

Description of the embodiments

The technical solution of embodiment 3 of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present utility model, and it is apparent that the described embodiment is only a part of embodiments of the present utility model, not all embodiments.

Referring to fig. 1-5, a battery system comprises a battery box 1, a liquid cooling plate 2 and a battery cell stack 4, wherein the battery cell stack 4 is arranged in the battery box 1, an explosion-proof valve for pressure relief, a power output electrode for outputting a power supply and other components are further arranged on the battery box 1, the battery cell stack 4 is formed by assembling a plurality of single battery cells, and the battery cell stack 4 is fixed in a glue injection mode after the single battery cells are assembled and combined.

The battery box 1 top is equipped with liquid cooling board 2, liquid cooling board 2 is located electric core stack 4 top, and electric core stack 4 top is lived in the cladding of liquid cooling board 2 completely, can effectually dispel the heat to electric core stack 4, is equipped with heat conduction structure between electric core stack 4 and the liquid cooling board 2 and glues 3, replaces the top cap through liquid cooling board 2, can also effectually promote space utilization under the prerequisite that realizes heat dissipation cooling and structural strength, can solve bottom liquid cooling board 2 and lead to the damaged problem of liquid cooling board 2 easily because of colliding with, is equipped with heat conduction structure between electric core stack 4 and liquid cooling board 2 simultaneously and glues 3, can solve the problem that electric box 1 heat transfer is inefficiency.

The battery box 1 is internally provided with the electric core cavity 7, the electric core stacks 4 are all placed in the electric core cavity 7, the inner surface of the electric core cavity 7 is rough, the friction force between the electric core cavity 7 and the electric core stacks 4 and the side plates 6 can be increased, and the electric core stacks 4 can be stably fixed in the electric core cavity 7.

Be equipped with division board 9 between the electric core cavity 7, division board 9 can separate out electric core cavity 7, can avoid too much electric core heap 4 to put together and lead to electric core heap 4 middle department high temperature, can effectually reduce the probability of firing, electric core heap 4 bottom is equipped with structural adhesive 5, and the area of structural adhesive 5 and heat conduction structural adhesive 3 is unanimous with electric core cavity 7 cross-sectional area to heat conduction structural adhesive 3 and structural adhesive 5 can be complete cladding electric core heap 4, can effectually dispel the heat to electric core heap 4.

The bottom of the battery box 1 is uniformly provided with the radiating holes 8 penetrating through the battery box 1, under the condition that the liquid cooling plate 2 does not exist at the bottom of the box body, the bottom of the battery cell stack 4 can be radiated through the structural adhesive 5 and the radiating holes 8, more battery cells can be placed in the saved space, the energy density can be improved, the intervals among the radiating holes 8 are uniform, so that the battery cell stack 4 can be uniformly radiated, the temperature of the battery cell stack 4 is kept uniform, and the service life of single battery cells in the battery cell stack 4 is kept uniform.

Both ends of electric core heap 4 all are equipped with curb plate 6, and curb plate 6 can press from both sides tight electric core heap 4 in electric core heap 4 both sides, can play fixed action to electric core heap 4, and electric core heap 4 is difficult for scattering because of external effort, and curb plate 6 is the symmetry setting as the center with electric core heap 4 to can make electric core heap 4 both sides atress comparatively even, can effectually prevent electric core heap 4 because of external effort is impaired.

The even cooling runner 10 that is equipped with on the liquid cooling board 2, through pouring the coolant into cooling runner 10 and dispel the heat to the monomer electricity core, liquid cooling board 2 is fixed through the mode of welding and bolt with battery box 1, and liquid cooling board 2 and battery box 1 carry out the edge welding through laser welding earlier, fix through the bolt, enable liquid cooling board 2 stable and fix with battery box 1.

The curb plate 6 of electric core heap 4 one side all contacts with division board 9 to the partial effort on the curb plate 6 can be passed on division board 9, shares the atress through division board 9, and division board 9 is detachable setting, and division board 9 is fixed with battery box 1 inside through the bolt, can convenient dismantlement, can splice at will according to the size of electric core heap 4, can form electric core cavity 7 of equidimension not, can be practical in electric core heap 4 of equidimension not.

The inside of the partition plate 9 can be hollow, cooling liquid can be injected into the partition plate 9, and the partition plate 9 is positioned between the two cell stacks 4, so that the temperature at the partition plate 9 is higher than the outside temperature of the cell stacks 4, the temperature of the cell stacks 4 to one side of the partition plate 9 is consistent with the outside temperature of the cell stacks 4 through injecting cooling liquid into the partition plate 9, the service lives of all the single cell cores in the cell stacks 4 are consistent, and the cell stacks 4 do not need to be frequently disassembled to maintain and replace the single cell cores.

Claims

1. The battery system comprises a battery box, a liquid cooling plate and a battery cell stack, wherein the battery cell stack is arranged in the battery box, and the liquid cooling plate is arranged at the top end of the battery box.

2. The battery system of claim 1, wherein a cell cavity is provided in the battery case, and the cell stacks are all disposed in the cell cavity.

3. The battery system of claim 2, wherein a separator is disposed between the cell cavities, a structural adhesive is disposed at the bottom ends of the cell stacks, and the areas of the structural adhesive and the thermally conductive structural adhesive are consistent with the cross-sectional areas of the cell cavities.

4. The battery system of claim 1, wherein the bottom end of the battery box is uniformly provided with heat dissipation holes penetrating through the battery box, and the distances among the heat dissipation holes are uniform.

5. A battery system according to claim 3, wherein the two ends of the cell stack are provided with side plates, and the side plates are symmetrically arranged with the cell stack as a center.

6. The battery system of claim 1, wherein the liquid cooling plates are uniformly provided with cooling channels, and the liquid cooling plates and the battery box are fixed by welding and bolts.

7. The battery system of claim 5, wherein the side plates on one side of the cell stack are in contact with the separator, and the separator is detachably disposed.