CN217522113U

CN217522113U - Liquid cooling structure of square battery

Info

Publication number: CN217522113U
Application number: CN202221049354.1U
Authority: CN
Inventors: 王增森; 葛科; 王化胜; 蒋倩
Original assignee: Jiangsu Higee Energy Co Ltd
Current assignee: Jiangsu Higee Energy Co Ltd
Priority date: 2022-05-05
Filing date: 2022-05-05
Publication date: 2022-09-30
Anticipated expiration: 2032-05-05

Abstract

The utility model relates to a square battery's liquid cooling structure, including square aluminum hull and the flat pipe of liquid cooling, the big side edgewise center of square aluminum hull is equipped with the concave station to the interior caving in of square aluminum hull, the left and right sides symmetry of concave station is equipped with access way, and the concave station link up through the big side of access way with square aluminum hull, the flat pipe setting of liquid cooling is in the concave station, the flat pipe cross-section of liquid cooling is the platykurtic. The utility model carries out liquid cooling from the side surface, thereby improving the cooling effect; the weight of the shell is properly reduced, the space of the shell is fully utilized, and the energy density of the battery pack is improved.

Description

Liquid cooling structure of square battery

Technical Field

The utility model relates to a lithium ion battery makes technical field, concretely relates to square battery's liquid cooling structure.

Background

The temperature control system of the new energy pure electric vehicle is generally designed as follows: the system comprises an air-conditioning refrigeration system, a heating system, a motor cooling system and a battery temperature control system. Among them, the battery temperature control system is more important. The temperature environment change in the battery module has very big influence to reliability, life-span and the performance of electricity core, consequently, just show especially important in making certain temperature range interval that the temperature maintained in the PACK, and this is realized through cooling and heating mainly.

The common cooling modes comprise an air cooling mode and a liquid cooling mode, wherein the air cooling mode is mainly to force cold air to flow through the surface of the battery for heat exchange and cooling, the scheme is greatly influenced by the external environment, especially in high-temperature weather, the cold air needs to be introduced from a passenger compartment, and the heat exchange efficiency is low; the temperature of the battery is difficult to control because the temperature of the inlet air is difficult to control; the liquid cooling mode is that the battery adopts the water-cooling mode heat transfer, to square aluminum hull, the liquid cooling mode is mainly distributed in the bottom of battery at present, because the pressure that is applyed to the battery at bottom cooling pipeline is little, so maneuverability is higher, but because the end that generates heat of battery is mainly the top of battery, especially the position of top utmost point post or inside utmost point ear, so take away the heat from the bottom and mean that the heat has been produced and just taken away after the bottom through aluminum hull heat transfer, can influence battery life, it is important in time to take away the heat from the big face of square aluminum hull battery.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects and provide a liquid cooling structure of a square battery, which carries out liquid cooling from the side surface and improves the cooling effect; the weight of the shell is properly reduced, the space of the shell is fully utilized, and the energy density of the battery pack is improved.

The purpose of the utility model is realized like this:

the utility model provides a square battery's liquid cooling structure, includes square aluminum hull and the flat pipe of liquid cooling, the big side edgewise center of square aluminum hull is equipped with the concave station to square aluminum hull indent, the left and right sides symmetry of concave station is equipped with access way, and the concave station is link up through the big side of access way with square aluminum hull, the flat pipe setting of liquid cooling is in the concave station, the flat pipe cross-section of liquid cooling is the platykurtic.

Preferably, the flat pipe of liquid cooling is snakelike, the flat pipe of liquid cooling is including the first straight tube, coiled pipe and the second straight tube that connect gradually, first straight tube and second straight tube are as the exit of the flat pipe of liquid cooling, first straight tube and second straight tube are spacing at the access way that corresponds.

Preferably, the concave platform is formed by punching, and the large side surface of the square aluminum shell is consistent with the wall thickness of the concave platform.

Preferably, the cross-section of the flat liquid cooling pipe is of a symmetrical structure, and the depth of the concave table is greater than half of the thickness of the flat liquid cooling pipe.

The utility model has the advantages that:

1. the side surface of the battery cell is subjected to liquid cooling, so that the temperature of the battery cell and the module can be efficiently controlled;

2. through the temperature control of the battery core, the capacity, the performance and the dynamic data of the battery module and the battery pack can be effectively evaluated;

3. the weight of the shell can be properly reduced, the space of the shell is fully utilized, and the energy density of the battery pack is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of a square aluminum case.

Fig. 3 is a schematic structural view of the flat liquid cooling pipe.

Fig. 4 is a schematic structural diagram of a square aluminum housing module.

Wherein: a square aluminum case 1; a liquid cooling flat tube 2; a first straight pipe 2.1; a serpentine tube 2.2; a second straight tube 2.3; a concave table 3; aspiration passageways 3.1.

Detailed Description

Referring to fig. 1-4, the utility model relates to a liquid cooling structure of a square battery, comprising a square aluminum shell 1 and a liquid cooling flat tube 2, wherein the large side of the square aluminum shell 1 is provided with a concave platform 3 from the side center to the square aluminum shell, the left and right sides of the concave platform 3 are symmetrically provided with an access passage 3.1, the concave platform 3 is communicated with the large side of the square aluminum shell 1 through the access passage 3.1, the liquid cooling flat tube 2 is arranged in the concave platform 3, the liquid cooling flat tube 2 is serpentine, the space is fully utilized according to the size of the square battery, the length of the liquid cooling flat tube is prolonged in a limited space, the flowing range of the cooling liquid is enlarged, the section of the liquid cooling flat tube 2 is flat, the heat transfer contact area with the surface of the square battery is enlarged, the liquid cooling flat tube 2 is convenient to be attached to the square aluminum shell 1 to absorb heat, the liquid cooling flat tube 2 comprises a first straight tube 2.1, a serpentine tube 2.2 and a second straight tube 2.3, the inlet and outlet of the flat liquid cooling pipe 2 are respectively a first straight pipe 2.1 and a second straight pipe 2.3, and the first straight pipe 2.1 and the second straight pipe 2.2 are limited in the corresponding inlet and outlet passage 3.1.

The concave table 3 is formed by punching, the large side face of the square aluminum shell 1 is consistent with the wall thickness of the concave table 3, and heat transfer and heat dissipation effects are ensured.

The cross-section of the flat liquid cooling pipe 2 is of a symmetrical structure.

The depth of the concave table 3 is larger than half of the thickness of the liquid cooling flat tube 2.

The big side of the square aluminum shell 1 is a plane where the length of the square aluminum shell 1 is multiplied by the height of the square aluminum shell.

The liquid cooling flat tube 2 is internally filled with cooling liquid, and the components of the cooling liquid are 50 percent of water and 50 percent of ethanol.

The application of the structure is as follows:

the utility model provides a square battery module, includes a plurality of square aluminum hull 1, sets up a flat pipe of liquid cooling 2 in the concave station 3 that the adjacent square aluminum hull 1 of big side corresponds, also is equipped with a flat pipe of liquid cooling 2 in the concave station of the square aluminum hull 1 in the outside, the flat pipe end portion intercommunication of liquid cooling in the adjacent square aluminum hull of little side.

Because the degree of depth of concave station 3 is greater than half of the flat pipe 2 thickness of liquid cooling, establish in the flat pipe 2 of liquid cooling between the adjacent square aluminum hull 1 of big side, there is stress between the flat pipe 2 of liquid cooling and the square aluminum hull 1, realizes that square aluminum hull 1 hugs closely each other and carries out the module, reduces battery module size.

The temperature rise of the battery module adopting bottom cooling is controlled within 15 ℃, and the temperature rise of the battery module adopting side cooling is controlled within 9 ℃, so that the cooling effect is better.

In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a square battery's liquid cooling structure which characterized in that: including square aluminum hull (1) and flat pipe of liquid cooling (2), the big side edgewise center of square aluminum hull (1) is equipped with concave station (3) to square aluminum hull indent, the left and right sides symmetry of concave station (3) is equipped with access way (3.1), and concave station (3) are link up through access way (3.1) and the big side of square aluminum hull (1), flat pipe of liquid cooling (2) set up in concave station (3), flat pipe of liquid cooling (2) cross-section is the platykurtic.

2. The liquid cooling structure for a prismatic battery according to claim 1, wherein: flat pipe of liquid cooling (2) are snakelike, flat pipe of liquid cooling (2) are including first straight tube (2.1), coiled pipe (2.2) and the second straight tube (2.3) that connect gradually, the import and export of flat pipe of liquid cooling (2) is regarded as in first straight tube (2.1) and second straight tube (2.3), first straight tube (2.1) and second straight tube (2.2) are spacing at access (3.1) that correspond.

3. The liquid cooling structure for a prismatic battery according to claim 1, wherein: the concave table (3) is formed by punching, and the large side surface of the square aluminum shell (1) is consistent with the wall thickness of the concave table (3).

4. The liquid cooling structure for a prismatic battery according to claim 1, wherein: the cross section of the flat liquid cooling pipe (2) is of a symmetrical structure, and the depth of the concave platform (3) is larger than half of the thickness of the flat liquid cooling pipe (2).