CN219873711U - Lithium battery side cooling structure - Google Patents

Abstract

The side cooling structure of the lithium battery comprises a front current collecting assembly and a rear current collecting assembly, wherein the interior of the front current collecting assembly and the rear current collecting assembly is divided into a plurality of horizontal chambers through a plurality of partitions which are vertical to the side walls, and notches which are distributed along the vertical direction are formed on two sides of each horizontal chamber; the plurality of partition plates are arranged in the middle of the horizontal chamber of the front current collecting assembly and divide the horizontal chamber into a left section and a right section; the two cooling plates are of a flat structure, two ends of the two cooling plates are open and respectively connected with notches formed in the front current collecting assembly and the rear current collecting assembly in a penetrating mode, and liquid paths are circulated.

Description

Lithium battery side cooling structure

Technical Field

The utility model relates to the technical field of lithium battery heat dissipation, in particular to a side cooling structure of a lithium battery.

Background

The utility model provides an energy storage lithium battery module, because lithium battery module compact structure, at quick charge and high-power in-process that discharges, can produce a large amount of heat, if the heat can't in time effectual digestion, get rid of, can make the decay rate of electric core accelerate, shorten the life-span of electric core, still can lead to the safety problem when serious, consequently, all be provided with in the current lithium battery module water and carry out refrigerated radiator unit.

So far, there are two forms of chassis for liquid cooling of energy storage lithium batteries, one is a water-cooled chassis made of an expanded aluminum plate, and the other is a parallel flow type water-cooled chassis made of a porous aluminum flat tube. However, these two cooling methods have a serious disadvantage in common, and the effect of cooling is very little.

Because the vertically standing lithium battery, the heating part of the vertically standing lithium battery generally extends downwards at one third of the part of the vertically standing lithium battery until the temperature is higher, the bottom of the lithium battery is cooled, and the cup and the firewood effect can only be achieved.

Disclosure of Invention

The inventor aims at the defects in the prior art, and provides a lithium battery side cooling structure which is layered in a collecting pipe and a cooling plate, so that the liquid level entering the cooling plate is more uniform, the upper layer of the side wall of a battery cell can be subjected to high-efficiency heat dissipation, the heat dissipation effect on the battery is improved, and meanwhile, the radiator is simple in processing technology, good in sealing performance and high in practicability.

The technical scheme adopted by the utility model is as follows:

a lithium battery side-cooling structure comprising: the front current collecting assembly and the rear current collecting assembly are internally divided into a plurality of horizontal chambers through a plurality of partitions which are vertical to the side walls, and notches which are distributed along the vertical direction are formed on two sides of each horizontal chamber; the plurality of baffles are arranged in the middle of the horizontal chamber of the front collecting assembly and divide the horizontal chamber into a left section and a right section, and the left section and the right section of one horizontal chamber are respectively inserted with water inlet and outlet pipes for inlet and outlet of refrigerants; the two cooling plates are of flat structures, two ends of each cooling plate are open and respectively connected with notches formed in the front current collecting assembly and the rear current collecting assembly in a penetrating manner, so that liquid path circulation is realized; the cooling plate is divided into a plurality of slender flow passages by a plurality of pipe orifice partition plates which are arranged in the cooling plate and are parallel to the side walls of the short sides and have equal length, and the slender flow passages and the horizontal chamber are opposite to each other to realize uniform flow of the refrigerant.

The front current collecting assembly and the rear current collecting assembly comprise a current collecting pipe cover and a current collecting pipe seat which are buckled with each other, and a avoidance hole for installing a cooling plate is reserved on the current collecting pipe cover.

The two cooling plates are arranged in parallel and are embedded into the lithium battery module to be attached to the two battery core layers for heat exchange.

The cooling plate is equal to the inner wall of the collecting pipe in height.

Two partition plates are arranged in the same horizontal chamber, openings of the two partition plates face the cooling plate, the partition plates are of U-shaped plate structures, and the overall thickness of the partition plates is infinitely close to the height of the partition.

And a space is arranged between the cooling plate and the notch, and the number of the pipe orifice partition boards is more than 15.

The beneficial effects of the utility model are as follows: enclose into a rectangle between through preceding mass flow subassembly, back mass flow subassembly and two cooling plates, imbed simultaneously in the lithium cell module, can make the both ends homoenergetic of cooling plate and the lateral wall contact of electric core, the rethread layering in pressure manifold and cooling plate to make the liquid level that gets into in the cooling plate more even, thereby can carry out high-efficient heat dissipation simultaneously to electric core lateral wall upper strata, improved the radiating effect to the battery.

The utility model has compact and reasonable structure and convenient operation,

meanwhile, the utility model has the following advantages:

(1) Through setting up the cooling plate both ends opening and extend respectively in preceding mass flow subassembly and the back mass flow subassembly, two cooling plates are located water inlet side and play water side simultaneously to realize that water flows the flow direction removal of mass flow subassembly-cooling plate-back mass flow subassembly-cooling plate-preceding mass flow subassembly before, and can take away the heat of lithium cell module when passing cooling plate and preceding back mass flow subassembly, realize the radiating effect.

(2) The cooling plate is characterized in that the plurality of long and thin pipe orifice partition plates parallel to the side walls of the short sides are arranged in the cooling plate, so that a plurality of long and thin flow passages are formed, meanwhile, due to the characteristics of small pipe diameter and large flow resistance, water can fill the whole horizontal chamber preferentially through the gaps on the partition plates, and then flows out of the horizontal chamber to the plurality of flow passages of the cooling plate, so that the purpose of conveying water to the side walls of the whole cooling plate can be achieved conveniently, the cooling plate is directly contacted with the side surfaces of the lithium battery module, the radiating surface is larger, and the radiating effect is better.

(3) Two cooling plates parallel arrangement, and every cooling plate all is between the two-layer electric core of lithium battery module when the installation, and with the lateral wall laminating of electric core, realize dispelling the heat to electric core upper strata.

(4) The number of the partition plates in the horizontal chamber is two, and the openings of the two partition plates face the cooling plate, so that the flow converging effect can be achieved, and the circulation of water is accelerated.

Drawings

Fig. 1 is a schematic view of the structural assembly of the present utility model.

Fig. 2 is a schematic view illustrating an internal structure of a front current collecting assembly according to the present utility model.

Fig. 3 is a schematic view illustrating an internal structure of a rear current collecting assembly according to the present utility model.

Fig. 4 is a schematic cross-sectional view of a front header assembly of the present utility model.

Fig. 5 is a schematic view of the structure of the cooling plate according to the present utility model.

FIG. 6 is a schematic cross-sectional view of a separator according to the present utility model.

FIG. 7 is a schematic view of the cross-sectional structure of A-A in FIG. 6.

Wherein: 1. a front header assembly; 2. a rear current collecting assembly; 3. a cooling plate; 4. a water inlet pipe and a water outlet pipe; 5. a lithium battery module; 6. a partition plate;

101. a manifold base; 1011. partition; 102. a header cap; 1021. avoidance holes;

301. a pipe orifice baffle.

Detailed Description

The following describes specific embodiments of the present utility model with reference to the drawings.

As shown in fig. 1-7, the present embodiment discloses a side cooling structure of a lithium battery, which acts on a square shell-shaped lithium battery module 5, and includes: the front current collecting component 1, the rear current collecting component 2 and the two cooling plates 3 enclose a rectangle between the front current collecting component 1, the rear current collecting component 2 and the two cooling plates 3, and as shown in fig. 1, the rectangle structure is embedded into the lithium battery module 5, so that both ends of the cooling plates 3 can be contacted with the side wall of the battery cell.

The front current collecting assembly 1 and the rear current collecting assembly 2 are internally divided into a plurality of horizontal chambers by a plurality of partitions 1011 perpendicular to the side walls, the number of the horizontal chambers is 4 in the embodiment, the two sides of the plurality of horizontal chambers are provided with notches distributed along the vertical direction, and the two ends of the cooling plate 3 are open and respectively connected in the notches arranged on the front current collecting assembly 1 and the rear current collecting assembly 2 in a penetrating and inserting way to realize liquid path circulation;

the plurality of baffle plates 6 are arranged in the middle of the horizontal chamber of the front current collecting assembly 1 and divide the horizontal chamber into left and right sections, the left and right sections of one horizontal chamber are respectively inserted with water inlet and outlet pipes 4 for inlet and outlet of refrigerants, water inlet and outlet are separated, and meanwhile, the two cooling plates 3 are respectively arranged on the water inlet side and the water outlet side, so that the flow direction movement of water through the front current collecting assembly 1-the cooling plates 3-the rear current collecting assembly 2-the cooling plates 3-the front current collecting assembly 1 is realized, and the heat of the lithium battery module 5 can be taken away when the water passes through the cooling plates 3 and the front current collecting assembly and the rear current collecting assembly.

As shown in fig. 6 and 7, the heat sink of the present embodiment has a "U" shaped plate structure, the overall thickness of the partition 6 is infinitely close to the height of the partition 1011, that is, the distance between the outer diameters of the two end plates of the "U" shaped plate, the overall thickness of the partition 6, that is, the height of the partition 1011 with the manifold base 101 as a reference point, and when the manifold base 101 and the manifold cover 102 are connected, the gap caused by the height difference between the partition 1011 and the partition 6 can be reduced, thereby improving the sealing property;

in the embodiment, two partition boards 6 are arranged in the horizontal chamber, and the openings of the two partition boards 6 face the cooling plate 3, so that inflow water and outflow water are not excessively dispersed, the confluence effect can be achieved, the circulation of water is accelerated, multiple layers of horizontal chambers can be well filled, and the liquid level is increased;

in this embodiment, a plurality of gaps corresponding to the positions of the cooling plates 3 and communicating with a plurality of horizontal chambers are formed on each partition 1011, liquid can be filled in the horizontal chambers through the gaps, and layering of the liquid in each horizontal chamber is achieved, in this embodiment, as shown in fig. 2, the water inlet and outlet pipe 4 is located on the side wall of the second horizontal chamber from bottom to top, due to the large water inflow, the cooling plates 3 are of flat structures, and are internally provided with a plurality of pipe orifice partition boards 301 with equal length parallel to the side walls of the short sides, so that a plurality of slender flow channels are formed, a space is formed between the cooling plates 3 and the gaps, the number of the pipe orifice partition boards 301 is greater than 15, the pipe diameters of each flow channel can be reduced, meanwhile, the space is formed between the cooling plates 3 and the gaps, so that the liquid enters the other horizontal walls through the gaps, meanwhile, due to the small pipe diameters and large flow resistance characteristics, the gaps on the partition 1011 preferentially fill the whole horizontal chamber, and then flow out from the horizontal chamber to the plurality of flow channels of the cooling plates 3, thereby facilitating uniform flow of the liquid, and achieving the purposes of directly contacting the side walls of the cooling plates 3 with the lithium-transporting module 5.

The above-described structural layout is not limited to the installation position of the water inlet/outlet pipe 4, and the water inlet/outlet pipe may be installed at a low position or at a high position, and water may be uniformly introduced into the cooling plate 3.

The radiator of the present embodiment includes a front manifold assembly 1 and a rear manifold assembly 2, each of which includes a manifold cover 102 that is fastened and brazed to each other, and a relief hole 1021 for mounting the cooling plate 3 is reserved in the manifold cover 102.

In the radiator of the embodiment, the two cooling plates 3 are arranged in parallel, and each cooling plate 3 is arranged between two layers of battery cells of the lithium battery module 5 during installation and is attached to the side wall of each battery cell, so that heat dissipation of the upper layer of each battery cell is realized.

As shown in fig. 1-4, the cooling plate 3 has the same height as the inner wall of the front current collecting assembly 1, and can contact with the side wall of the battery cell in a larger area, so that the heat dissipation effect is improved.

The above description is intended to illustrate the utility model and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the utility model.

Claims (6)

1. A lithium battery side cooling structure, comprising:

the front current collecting assembly (1) and the rear current collecting assembly (2), wherein the interior of the front current collecting assembly (1) and the rear current collecting assembly (2) is divided into a plurality of horizontal chambers through a plurality of partitions (1011) which are perpendicular to the side walls, and notches which are distributed along the vertical direction are formed on two sides of each horizontal chamber;

the plurality of partition plates (6) are arranged in the middle of the horizontal chamber of the front collecting assembly (1) and divide the horizontal chamber into a left section and a right section, and the left section and the right section of one horizontal chamber are respectively inserted with a water inlet pipe (4) for leading in and out a refrigerant;

the two cooling plates (3) are of flat structures, are open at two ends and respectively connected in a penetrating manner in gaps formed in the front current collecting assembly (1) and the rear current collecting assembly (2) in a penetrating manner, so that liquid path circulation is realized;

the cooling plate (3) is divided into a plurality of slender flow passages by a plurality of pipe orifice partition plates (301) which are arranged in the cooling plate and are parallel to the side walls of the short sides and have equal length, and the slender flow passages and the horizontal chamber are opposite to each other to realize uniform flow of the refrigerant.

2. The lithium battery side cooling structure according to claim 1, wherein: the front current collecting assembly (1) and the rear current collecting assembly (2) comprise a current collecting pipe cover (102) and a current collecting pipe seat (101) which are buckled with each other, and avoidance holes (1021) for installing the cooling plate (3) are reserved in the current collecting pipe cover (102).

3. The lithium battery side cooling structure according to claim 1, wherein: the two cooling plates (3) are arranged in parallel and are embedded into the lithium battery module (5) to be attached to the two battery core layers for heat exchange.

4. The lithium battery side cooling structure according to claim 1, wherein: the cooling plate (3) is equal to the inner wall of the collecting pipe in height.

5. The lithium battery side cooling structure according to claim 1, wherein: two partition plates (6) are arranged in the same horizontal cavity, openings of the two partition plates (6) face the cooling plate (3), the partition plates (6) are of U-shaped plate structures, and the overall thickness of the partition plates (6) is infinitely close to the height of the partition (1011).

6. The lithium battery side cooling structure according to claim 1, wherein: and a space is arranged between the cooling plate (3) and the notch, and the number of the pipe orifice partition plates (301) is more than 15.