CN218123544U - A battery case with integrated liquid cooling structure - Google Patents

Abstract

The utility model discloses an electric core housing with an integrated liquid cooling structure, which comprises a square housing and a first cover plate. The square housing includes two long-side side plates, two short-side side plates and a bottom plate. A separator is arranged on the inner side of the side plate at a certain distance, and a square cylindrical cell cavity is formed between the two separators. The first cover sealing cover is arranged at the top opening of the cell cavity, and a single separator A cooling liquid cavity is formed between the long side plate and the corresponding side, and a second cover plate is arranged on the top of the cooling liquid cavity, and a liquid inlet port and a liquid outlet port are arranged on the second cover plate. Preferably, the separator and the square casing are integrally extruded from aluminum. Through the circulating flow of cooling liquid in the cooling liquid cavity, the heat generated by the battery core is taken away, and the heat is dissipated to realize the integration of the liquid cooling structure and the square shell, reduce the number of assembled parts when the square battery is assembled, and improve production efficiency. Also greatly reduce the cost of manufacturing.

Description

A cell housing with integrated liquid cooling structure

technical field

The utility model relates to the technical field of lithium batteries, in particular to an electric core housing with an integrated liquid cooling structure.

Background technique

Electric square lithium batteries usually refer to aluminum shell or steel shell square batteries. The structure is relatively simple and the energy density is high. However, square batteries need to solve the problem of heat dissipation. When existing square batteries are grouped, the larger sides are usually arranged in groups, and some heat-conducting silicone pads or liquid cooling plates are placed between the two to dissipate heat. The use of heat-conducting silicone pads for heat dissipation effects and the use of liquid-cooled plates increases the number of parts of the battery module, resulting in increased manufacturing costs and increased assembly processes, affecting production efficiency and greatly increasing production costs.

Contents of the invention

The technical problem to be solved by the utility model is to provide a cell casing with integrated liquid cooling structure, which integrates the liquid cooling structure on the cell casing, reduces the number of parts in a group of square batteries, improves production efficiency, and reduces costs.

In order to solve the above-mentioned technical problems, a cell casing with an integrated liquid cooling structure of the present invention includes a square casing and a first cover plate. The square casing has a square cylindrical structure and includes two long side panels , two short-side side plates and a bottom plate, each of the long-side side plates is provided with a partition at a certain distance from the inside, and the two partitions, the two short-side side plates and the bottom plate are surrounded by a The square cylindrical cell cavity is used for storing the cell and the electrolyte, and the sealing cover of the first cover plate is arranged at the top opening of the cell cavity. The single separator, the two The four short side plates, the bottom plate and the long side plates on the corresponding side form a flat cooling liquid cavity, the cooling liquid cavity is used to store cooling liquid, and the top of the cooling liquid cavity is provided with a second Two cover plates, the sealing cover of the second cover plate is arranged at the top opening of the cooling liquid chamber, and the second cover plate is provided with a liquid inlet and a liquid outlet. Preferably, the separator and the square casing are integrally extruded from aluminum.

In the above-mentioned cell housing with integrated liquid cooling structure, a partition plate is arranged on the inner side of the larger side of the square housing to form a cavity structure for the cooling liquid to circulate, take away the heat generated by the cell, and dissipate heat. In order to realize the integration of the liquid cooling structure and the square shell, the separator and the square shell can be extruded into one piece of aluminum, reducing the number of assembled parts when the square battery is assembled, improving production efficiency, and greatly reducing the cost of manufacturing .

As an improvement of the electric core housing with integrated liquid cooling structure of the present invention, a liquid flow channel is arranged inside the cooling liquid cavity, so that after the cooling liquid enters the cooling liquid cavity from the liquid inlet, it flows along the Flow to the liquid outlet along the fixed channel. By restricting the flow route of the cooling liquid in the cooling liquid cavity through the liquid flow channel, the liquid flow channel can be designed so that the cooling liquid can take away more heat after passing through the cooling liquid cavity.

Further, the interior of the cooling liquid cavity is provided with several baffles arranged along the height direction of the square housing, and the baffles divide the cooling liquid cavity into several independent vertical flow channels, and the The top of the flow channel communicates with the liquid inlet and the liquid outlet respectively, and the top or bottom of the baffle is provided with a through hole, and the through hole communicates with the flow channels on both sides, and the adjacent The through holes of the two baffles are not on the same end. Increase the stroke of the coolant flowing through the coolant chamber once, so that the coolant can fully contact with the separator for heat exchange and take away more heat.

To sum up, adopting the cell casing with integrated liquid cooling structure, the liquid cooling structure is integrated on the cell casing, which reduces the number of parts of the square battery group, improves production efficiency, and reduces costs; The cooling effect is better.

Description of drawings

In the attached picture:

Fig. 1 is the overall split structure diagram of the utility model.

Fig. 2 is a structural diagram of the cooling liquid chamber of the present invention.

Fig. 3 is a structure diagram of the first cover plate and the second cover plate of the present invention.

In the figure, 1. Square shell; 11. Long-side side plate; 12. Short-side side plate; 13. Bottom plate; 2. First cover plate; 3. Partition plate; 4. Cell chamber; 5. Coolant chamber ; 6, the second cover plate; 61, the liquid inlet; 611, the liquid inlet; 62, the liquid outlet; 621, the liquid outlet; 7, the baffle;

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model will be further described. It should be noted here that the descriptions of these implementations are used to help understand the utility model, but are not intended to limit the utility model.

Figures 1-3 show a cell housing with an integrated liquid cooling structure of the present invention. As shown in Figure 1, the cell case with integrated liquid cooling structure includes a square case 1 and a first cover plate 2, the square case 1 is a square cylindrical structure, including two long side plates 11, two short Side plate 12 and bottom plate 13, the inner side of each long side plate 11 is all provided with a dividing plate 3 at a certain distance, two dividing plates 3, two short side plates 12 and base plate 13 surround the square cylindrical shape The cell cavity 4, the cell cavity 4 is used to store the cell and the electrolyte, the first cover plate 2 sealing cover is arranged at the top opening of the cell cavity 4, a single separator 3, two short side plates 12, a bottom plate 13 and the long-side side plate 11 on the corresponding side form a flat cooling liquid chamber 5, the cooling liquid chamber 5 is used to store the cooling liquid, the top of the cooling liquid chamber 5 is provided with a second cover plate 6, and the second cover plate 6 seals the cover A liquid inlet 61 and a liquid outlet 62 are provided on the second cover 6 at the top opening of the cooling liquid cavity 5 .

Optionally, the partition plate 3 is integrally formed with the square casing 1 to reduce the production cost of the cooling structure. A liquid inlet nozzle 611 is arranged on the top of the liquid inlet 61 , and the liquid inlet nozzle 611 is connected with a liquid supply pipeline for injecting cooling liquid into the cooling liquid cavity 5 . The top of the liquid outlet 62 is provided with a liquid outlet nozzle 621 , and the liquid outlet nozzle 621 is connected with a liquid outlet pipeline for leading out the cooling liquid in the cooling liquid cavity 5 .

When in use, the long-side side plates 11 of the square batteries are directly pasted in pairs to form a group, without adding other heat dissipation structures, and the production efficiency of the group is improved; The liquid pipeline is connected. When the module needs to dissipate heat during use, the cooling liquid is continuously injected into each cooling liquid cavity 5. The cooling liquid takes away the heat of the battery core and then flows out from the liquid outlet 62 to collect in the liquid return line. After being cooled, it circulates to the liquid supply pipeline and circulates for cooling.

Optionally, a liquid flow channel is provided inside the cooling liquid chamber 5 , so that the cooling liquid flows into the liquid outlet 62 along the fixed channel after entering the cooling liquid chamber 5 from the liquid inlet 61 . The liquid flow channel restricts the flow route of the cooling liquid in the cooling liquid cavity 5 , and the liquid flow channel can be designed so that the cooling liquid can take away more heat after passing through the cooling liquid cavity 5 .

As shown in Figure 2, the interior of the cooling liquid chamber 5 is provided with several baffles 7 arranged along the height direction of the square housing 1, and the baffles 7 divide the cooling liquid chamber 5 into several independent vertical flow channels 71, with The top of the flow channel 71 communicates with the liquid inlet 61 and the liquid outlet 62 respectively, and the top or bottom of the baffle plate 7 has a through hole 72, and the through hole 72 communicates with the flow channels 71 on both sides, and the two adjacent baffle plates The through holes 72 of 7 are not on the same end.

The liquid inlet 61 and the liquid outlet 61 are respectively located at the two ends of the second cover plate 6, so that the coolant can flow out of the liquid outlet 62 through multiple upward and downward circuitous flows in the coolant cavity 5, increasing The single passage of the cooling liquid from the cooling liquid chamber 5 makes the cooling liquid fully contact with the partition plate 3 for heat exchange and takes away more heat.

As shown in FIG. 3 , the top of the partition 3 is flush with the top of the square housing 1 , and the first cover 2 and the second cover 6 are fixed by welding. The thickness of the partition plate 3 is twice the thickness of the short side plate 12 . A gap is provided between the first cover plate 2 and the second cover plate 6 .

Both sides of the first cover plate 2 are welded with the second cover plate 6, and the thickness of the partition plate 3 is relatively thick, so that sufficient space or even a gap can be reserved between the first cover plate 2 and the second cover plate 6, and each cover plate For welding, it is convenient for welding operation.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than limiting its protection scope. Although the utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand After reading the utility model, those skilled in the art can still carry out various changes, amendments or equivalent replacements to the specific embodiments of the invention, but these changes, amendments or equivalent replacements are all within the protection scope of the pending claims of the invention.

Claims (9)

1. The utility model provides an electricity core casing of integrated liquid cooling structure, its characterized in that, includes square casing (1) and first apron (2), square casing (1) is square tubular structure, including two long limit curb plates (11), two minor face curb plates (12) and bottom plate (13), every the inboard certain distance of interval of long limit curb plate (11) all is provided with a baffle (3), two minor face curb plate (12) and electric core chamber (4) of the square tube-shape that bottom plate (13) enclose, electric core chamber (4) are used for depositing electric core and electrolyte, the sealed lid of first apron (2) is established the top opening part of electric core chamber (4), singly baffle (3), two minor face curb plate (12), bottom plate (13) and corresponding side long limit curb plate (11) enclose into flat cooling liquid chamber (5), cooling liquid chamber (5) are used for depositing the coolant liquid, the top of cooling liquid chamber (5) is provided with second apron (6), sealed lid (6) are established cooling liquid chamber (5) top opening part upper opening part is provided with second inlet (61) and liquid outlet (61).

2. The cell casing of an integrated liquid cooling structure according to claim 1, wherein a liquid flow channel is provided inside the cooling liquid cavity (5), so that the cooling liquid flows from the liquid inlet (61) into the cooling liquid cavity (5) to the liquid outlet (62) along a fixed channel.

3. The electric core shell of the integrated liquid cooling structure according to claim 1 or 2, wherein a plurality of baffles (7) are arranged in the cooling liquid cavity (5) along the height direction of the square shell (1), the baffles (7) divide the cooling liquid cavity (5) into a plurality of independent vertical flow channels (71), the top ends of the flow channels (71) at two sides are respectively communicated with the liquid inlet (61) and the liquid outlet (62), the top end or the bottom end of each baffle (7) is provided with a through hole (72), the through holes (72) are communicated with the flow channels (71) at two sides, and the through holes (72) of two adjacent baffles (7) are not located at the same end.

4. The electric core shell with an integrated liquid cooling structure according to claim 1, wherein the top end of the partition plate (3) is flush with the top end face of the square shell (1), and the first cover plate (2) and the second cover plate (6) are fixed by welding.

5. The cell casing of an integrated liquid-cooled structure according to claim 1 or 4, wherein the thickness of the partition (3) is twice the thickness of the short side plates (12).

6. The cell housing of an integrated liquid-cooled structure according to claim 1 or 4, characterized in that a gap is provided between the first cover plate (2) and the second cover plate (6).

7. The battery core shell with an integrated liquid cooling structure according to claim 1, wherein a liquid inlet nozzle (611) is disposed at a top of the liquid inlet (61), and the liquid inlet nozzle (611) is connected to a liquid supply pipeline for injecting a cooling liquid into the cooling liquid cavity (5).

8. The battery cell casing with an integrated liquid cooling structure according to claim 1, wherein a liquid outlet nozzle (621) is disposed at a top of the liquid outlet (62), and the liquid outlet nozzle (621) is connected to a liquid outlet pipeline for leading out the cooling liquid in the cooling liquid cavity (5).

9. The cell casing of an integrated liquid-cooled structure according to claim 1, wherein the separator (3) is integrally formed with the square casing (1).

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