Novel high-magnification power battery structure

Abstract

The utility model relates to a novel high-magnification power battery structure, which comprises a shell, a cooling structure and battery components, a plurality of battery components are arranged in the shell at equal intervals, and polyurethane foam is filled between two adjacent battery components and between the battery components and the shell. The cooling structures are installed at the two ends of the shell, the battery assembly comprises a soft package battery cell, heat-conducting fins and supporting structures, the heat-conducting fins are attached to the two side faces of the soft package battery cell, the supporting structures are installed at the two ends of the soft package battery cell, and tabs of the soft package battery cell penetrate through the supporting structures. According to the novel high-rate power battery structure, the battery assembly can rapidly conduct heat generated by charging and discharging to the shell through the polyurethane foam, and then the heat is rapidly absorbed through the cooling structure, so that the rapid heat dissipation effect is achieved, and the requirement of high-rate discharging of the power battery structure is met; and the practical safety performance of the power battery structure is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially is related to a novel high rate power battery structure. BACKGROUND

[0002] Lithium ion battery is widely used in portable electronic products, power tools and other fields due to its high voltage and large energy density, and is also considered as one of the main development directions of EV, HEV and PHEV.

[0003] There are many factors affecting the high rate discharge of lithium ion battery, and raw materials, formula, structure and process technology are main influencing factors. At present, the cycle performance of ternary material is better, but due to its high price, ternary material is generally not used in the actual manufacture of lithium ion high rate power battery. Large battery will produce temperature rise when discharging, and the higher the discharge rate, the more heat generated, which is easy to cause self overheating, not only causing battery thermal runaway, but also smoking, fire, even explosion, and causing fire, causing a lot of unnecessary loss. UTILITARIAN CONTENT

[0004] The main purpose of the utility model is to provide a novel high rate power battery structure to solve the above technical problems and achieve the effect of sufficient heat conduction and heat dissipation.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A novel high rate power battery structure comprises a shell, a cooling structure and a battery assembly, a plurality of battery assemblies are arranged equidistantly in the shell, polyurethane foam is filled between two adjacent battery assemblies and between the battery assembly and the shell, the cooling structure is installed at both ends of the shell, the battery assembly comprises a soft package battery core, a heat conducting sheet and a supporting structure, the heat conducting sheet is attached to the two side surfaces of the soft package battery core, the supporting structure is installed at both ends of the soft package battery core, and the tab of the soft package battery core penetrates through the supporting structure.

[0007] As a preferred technical scheme, the heat conducting sheet is a heat conducting copper sheet or a heat conducting aluminum sheet.

[0008] As a preferred technical scheme, the supporting structure is EVA foam.

[0009] As a preferred technical scheme, the shell comprises an aluminum alloy lower cover and an aluminum alloy upper cover, a plurality of battery assemblies are arranged equidistantly in the aluminum alloy lower cover, and the aluminum alloy upper cover is clamped in the aluminum alloy lower cover.

[0010] As a preferred technical scheme, the cooling structure comprises a connecting pipeline, an upper liquid cooling plate and a lower liquid cooling plate, the upper liquid cooling plate is installed in the aluminum alloy upper cover, the lower liquid cooling plate is installed in the aluminum alloy lower cover, and the upper liquid cooling plate is communicated with the lower liquid cooling plate through the connecting pipeline.

[0011] As a preferred technical scheme, the upper liquid cooling plate comprises an upper liquid inlet and an upper liquid outlet, the upper liquid inlet and the upper liquid outlet are installed on two sides of the upper liquid cooling plate, the lower liquid cooling plate comprises a lower liquid inlet and a lower liquid outlet, the lower liquid inlet and the lower liquid outlet are installed on two sides of the lower liquid cooling plate, the upper liquid outlet is communicated with the lower liquid inlet through the connecting pipeline, and the upper liquid inlet and the lower liquid inlet are communicated with external pipelines.

[0012] As a preferred technical scheme, the aluminum alloy upper cover is provided with an upper groove for the upper liquid inlet and the upper liquid outlet to extend out, and the aluminum alloy lower cover is provided with a lower groove for the lower liquid inlet and the lower liquid outlet to extend out.

[0013] As a preferred technical scheme, the shell further comprises a fixing plate, the fixing plate is installed at the bottom of the aluminum alloy upper cover and the aluminum alloy lower cover, the fixing plate is installed at the middle and two sides of the upper liquid cooling plate and the lower liquid cooling plate, and the fixing plate abuts against the upper liquid cooling plate and the lower liquid cooling plate.

[0014] The novel high-rate power battery structure has the advantages that the battery assembly can quickly conduct the heat generated by charging and discharging to the shell through the polyurethane foam, and then quickly absorb the heat through the cooling structure, so that the effect of quick heat dissipation is achieved, the demand of high-rate discharging of the power battery structure is met, and the practical safety performance of the power battery structure is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a structural schematic view of the novel high-rate power battery structure according to the present application;

[0016] Figure 2 FIG. 2 is a side view of the novel high-rate power battery structure according to the present application;

[0017] Figure 3 FIG. 3 is a front view of the battery assembly according to the present application;

[0018] Figure 4 FIG. 4 is a side view of the battery assembly according to the present application. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples.

[0020] As Figure 1 and Figure 2 shown, a new high-power battery structure, including shell 2, cooling structure 3, polyurethane foam 4 and battery assembly 1, a plurality of battery assembly 1 equidistantly arranged in shell 2, and a plurality of battery assembly 1 is sequentially connected, two adjacent battery assembly 1, battery assembly 1 and shell 2 and cooling structure 3 and shell 2 between filling polyurethane foam 4, cooling structure 3 is installed at both ends of shell 2, polyurethane foam 4 has insulation, can isolate the electrical contact between battery assembly 1 and shell 2, and has buffering performance, prevent the expansion of the battery cell from being squeezed as the working time increases, and improve the impact resistance of the battery cell, also have high thermal conductivity, can pass the heat generated by battery assembly 1 through polyurethane foam 4 to shell 2, shell 2 has high tensile strength, can effectively resist external impact force, cooling structure 3 can absorb the heat transferred from battery assembly 1 to shell 2 by introducing cooling liquid, so that the temperature of the battery cell during operation is fully discharged, most of the heat is taken away by the cooling liquid, so that the battery can work normally during high-rate discharge.

[0021] Please refer to Figure 3 and Figure 4 shown, battery assembly 1 includes soft package battery cell 11, heat conduction sheet 12 and support structure 13, heat conduction sheet 12 is attached to both sides of soft package battery cell 11, support structure 13 is installed at both ends of soft package battery cell 11, and the tab of soft package battery cell 11 passes through support structure 13, support structure 13 can make soft package battery 11 orderly fixed in shell 2, heat conduction sheet 12 is heat conduction copper sheet or heat conduction aluminum sheet, which can quickly absorb the heat generated during charging and discharging of soft package battery cell 11, so as to conduct the heat to shell 2, support structure 13 is EVA foam, so as to realize the buffering and fixing effect.

[0022] Please continue to refer to Figure 1 and Figure 2As shown, the shell 2 comprises an aluminum alloy lower cover 22 and an aluminum alloy upper cover 21, a plurality of battery assemblies 1 are arranged equidistantly in the aluminum alloy lower cover 22, and the aluminum alloy upper cover 21 is clamped in the aluminum alloy lower cover 22, so as to protect the battery assemblies 1 in the shell 2. The cooling structure 3 comprises a connecting pipe 33, an upper liquid cooling plate 31 and a lower liquid cooling plate 32, the upper liquid cooling plate 31 is installed in the aluminum alloy upper cover 21, the lower liquid cooling plate 32 is installed in the aluminum alloy lower cover 22, the upper liquid cooling plate 31 is communicated with the lower liquid cooling plate 32 through the connecting pipe 33, so as to realize the conduction between the upper liquid cooling plate 31 and the lower liquid cooling plate 32, so as to realize the introduction of the cooling liquid from the upper liquid cooling plate 31, the flow of the cooling liquid from the upper liquid cooling plate 31 to the lower liquid cooling plate 32 through the connecting pipe 33, the heat is taken out of the shell 2 by the cooling liquid, the upper liquid cooling plate 31 comprises an upper inlet 311 and an upper outlet 312, the upper inlet 311 and the upper outlet 312 are installed on both sides of the upper liquid cooling plate 31, the lower liquid cooling plate 32 comprises a lower inlet 321 and a lower outlet 322, the lower inlet 321 and the lower outlet 322 are installed on both sides of the lower liquid cooling plate 32, the upper outlet 312 is communicated with the lower inlet 321 through the connecting pipe 33, and the upper inlet 311 and the lower outlet 322 are communicated with external pipes, so as to realize the flow of the cooling liquid from the external pipes into the upper liquid cooling plate 31 through the upper inlet 311, the flow of the cooling liquid from the lower inlet 321 into the lower liquid cooling plate 32 through the upper outlet 322 and the connecting pipe 33, and the flow of the cooling liquid out of the lower outlet 322 through the external pipes, so as to realize the flow of the cooling liquid absorbing heat. The aluminum alloy upper cover 21 is provided with an upper groove 211 for the upper inlet 311 and the upper outlet 312 to extend out, the aluminum alloy lower cover 22 is provided with a lower groove 221 for the lower inlet 321 and the lower outlet 322 to extend out, so as to reduce the thickness of the high-rate power battery structure, thereby reducing the volume of the high-rate power battery structure. The shell 21 further comprises a fixing plate 23, the fixing plate 23 is installed at the bottom of the aluminum alloy upper cover 21 and the aluminum alloy lower cover 22, the fixing plate 23 is installed at the middle and both sides of the upper liquid cooling plate 31 and the lower liquid cooling plate 32, and abuts against the upper liquid cooling plate 31 and the lower liquid cooling plate 32, so as to fix the upper liquid cooling plate 31 and the lower liquid cooling plate 32 in the aluminum alloy upper cover 21 and the aluminum alloy lower cover 22.

[0023] The above-described embodiments are only preferred examples of the present application, and do not limit the scope of the present application, so equivalent changes or modifications made according to the structure, features and principles described in the patent application range of the present application shall be included in the patent application range of the present application.

Claims

1. A novel high rate power cell structure, characterized in that, The battery pack includes a shell, a cooling structure and a plurality of battery assemblies, the battery assemblies are equidistantly arranged in the shell, polyurethane foam is filled between two adjacent battery assemblies and between the battery assemblies and the shell, the cooling structure is installed at two ends of the shell, the battery assembly includes a soft-pack battery cell, a heat-conducting sheet and a support structure, the heat-conducting sheet is attached to two side surfaces of the soft-pack battery cell, the support structure is installed at two ends of the soft-pack battery cell, and a tab of the soft-pack battery cell penetrates through the support structure.

2. The novel high rate power cell structure of claim 1, wherein, The heat-conducting sheet is a heat-conducting copper sheet or a heat-conducting aluminum sheet.

3. The novel high rate power cell structure of claim 1, wherein, The support structure is EVA foam.

4. The novel high rate power cell structure of claim 1, wherein, The shell includes an aluminum alloy lower cover and an aluminum alloy upper cover, the battery assemblies are equidistantly arranged in the aluminum alloy lower cover, and the aluminum alloy upper cover is clamped in the aluminum alloy lower cover.

5. The novel high rate power cell structure of claim 4, wherein, The cooling structure includes a connecting pipe, an upper liquid cooling plate and a lower liquid cooling plate, the upper liquid cooling plate is installed in the aluminum alloy upper cover, the lower liquid cooling plate is installed in the aluminum alloy lower cover, and the upper liquid cooling plate is in communication with the lower liquid cooling plate through the connecting pipe.

6. The novel high rate power cell structure of claim 5, wherein, The upper liquid cooling plate includes an upper inlet and an upper outlet, the upper inlet and the upper outlet are installed at two sides of the upper liquid cooling plate, the lower liquid cooling plate includes a lower inlet and a lower outlet, the lower inlet and the lower outlet are installed at two sides of the lower liquid cooling plate, the upper outlet is in communication with the lower inlet through the connecting pipe, and the upper inlet and the lower inlet are in communication with external pipes.

7. The novel high rate power cell structure of claim 6, wherein, The aluminum alloy upper cover is provided with upper grooves for the upper inlet and the upper outlet to extend out, and the aluminum alloy lower cover is provided with lower grooves for the lower inlet and the lower outlet to extend out.

8. The novel high rate power cell structure of claim 7, wherein, The shell further includes a fixing plate, the fixing plate is installed at bottoms of the aluminum alloy upper cover and the aluminum alloy lower cover, the fixing plate is installed at a middle portion and two sides of the upper liquid cooling plate and the lower liquid cooling plate, and the fixing plate abuts against the upper liquid cooling plate and the lower liquid cooling plate.

Images