CN218299952U - Frame heat radiation structure and power battery module with same - Google Patents

Abstract

The utility model provides a frame heat dissipation structure and a power battery module with the structure. The frame heat dissipation structure includes an end vapor chamber, a bottom vapor chamber, and several vapor chambers between battery cells. The frame heat dissipation structure is arranged around the battery module. The end and the bottom of the battery cell are in contact with each other for heat transfer. The soaking plates between the battery cells are arranged side by side on the bottom soaking plate, and a compartment for placing the battery core is formed between two adjacent soaking plates between the battery cells. The chamber is used for heat transfer in contact with the battery cells on both sides. The utility model can significantly improve the serious heat generation and uneven temperature distribution inside the power battery module by setting multiple soaking plates, and transmit heat from the inside of the battery module to the outside of the casing in a multi-level and high-efficiency manner. Efficient thermal control of battery modules.

Description

A frame heat dissipation structure and a power battery module with the structure

technical field

The utility model relates to the technical field of power battery module heat dissipation, in particular to a frame heat dissipation structure and a power battery module with the structure.

Background technique

In recent years, the rapid development of electric vehicles has driven the development of power batteries. As the power source of electric vehicles, the quality of battery performance is not only related to the length of driving range of the vehicle, but also related to the safety and reliability of the product. It can be said that the development of power batteries determines the future of pure electric vehicles.

There are many types of new energy power battery modules. Among them, ternary lithium power battery modules and lithium iron phosphate power battery modules are the leading applications in the field of passenger cars and commercial vehicles. At present, the power battery modules for passenger cars are ternary Lithium power battery modules are the main ones, and commercial vehicle power battery modules are mainly lithium iron phosphate power battery modules. One of the bottlenecks currently hindering the development of power lithium-ion power battery modules is its safety performance. Due to the high energy density, high working temperature, and harsh working environment of lithium-ion power battery modules, coupled with the people-oriented safety concept, users have put forward very high requirements for the safety of power battery modules.

The biggest problem faced by power batteries is accelerated aging, performance attenuation and even explosion and fire caused by excessive temperature. Therefore, it is very important to realize rapid heat dissipation of power battery module cells.

Utility model content

In view of this, in order to alleviate the problems caused by the high temperature of the power battery module, the utility model proposes a frame heat dissipation structure applied to the power battery module.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions to achieve:

A frame heat dissipation structure, which is a three-dimensional heat conduction frame formed by setting the vapor chamber around the battery core, using the principle of releasing a large amount of latent heat through the gas-liquid phase change inside the vapor chamber, and transferring heat from the inside of the battery module in a multi-layered and efficient manner to the outside of the casing to achieve efficient thermal control of the battery module. The frame heat dissipation structure includes an end vapor chamber, a bottom vapor chamber, and several vapor chambers between battery cells. The frame heat dissipation structure is arranged around the battery module. The end and the bottom of the battery cell are in contact with each other for heat transfer. The soaking plates between the battery cells are arranged side by side on the bottom soaking plate, and a compartment for placing the battery core is formed between two adjacent soaking plates between the battery cells. The chamber is used for heat transfer in contact with the battery cells on both sides.

Further, there are contact positions between the end vapor chamber and the bottom vapor chamber, between the end vapor chamber and the chamber between the battery cells, and between the bottom chamber and the chamber between the battery cells They are filled with heat-conducting soft materials such as heat-conducting silicone grease or heat-conducting mud or heat-conducting potting glue that exist on the market. Fill the air gap and reduce thermal resistance.

In the utility model, the end soaking plate includes a front soaking plate and a rear soaking plate. Frame structure, the vapor chambers between battery cells are arranged in a "U"-shaped frame at intervals, the lower end of the vapor chambers between battery cells is in contact with the bottom vapor chamber, and the front and rear ends of the vapor chambers between battery cells are respectively connected to the front end The vapor chamber and the rear-end vapor chamber are in contact, so that a compartment for arranging battery cores is formed between the vapor chambers between two adjacent battery cores.

A power battery module, comprising a casing, a battery core, and a frame heat dissipation structure, the frame heat dissipation structure including an end vapor chamber, a bottom vapor chamber, and several vapor chambers between battery cores, the bottom vapor chamber is inserted In the bottom slot of the housing, the end vapor chambers are inserted into the front and/or rear slots of the housing, and the heat chambers between battery cells are arranged side by side between the two ends of the housing, so that A separate groove is formed between the soaking plates between the battery cells, the battery core is arranged in the separating groove, the end soaking plate, the bottom soaking plate and the soaking plate between the battery cores are connected with the end soaking plates of the battery core respectively. The top, bottom and sides are in contact and conduct heat transfer.

Further, there are contact positions between the end vapor chamber and the bottom vapor chamber, between the end vapor chamber and the chamber between the battery cells, and between the bottom chamber and the chamber between the battery cells They are filled with heat-conducting soft materials such as heat-conducting silicone grease or heat-conducting mud or heat-conducting potting glue that exist on the market. Fill the air gap and reduce thermal resistance. In addition, all positions where the vapor chamber is in contact with the casing or the battery core are also filled with thermally conductive soft materials such as thermally conductive silicone grease, thermally conductive mud, or thermally conductive potting glue.

Further optionally, the two ends and the bottom of the housing are provided with liquid cooling plates, and the flow rate of the coolant in the liquid cooling plates can be set according to different heating conditions of the power battery module. This embodiment combines the high thermal conductivity of the phase change vapor chamber with the excellent heat dissipation performance of the traditional liquid cooling structure to achieve efficient thermal control of the power battery module.

Further optionally, both ends of the housing are provided with finned heat dissipation structures, and the finned heat dissipation structures greatly increase the convective heat exchange area between the heating element and the air. There are blowers next to the two fin heat dissipation structures to strengthen the convective heat exchange process between the air and the power battery module, and combine the efficient temperature uniformity of the internal heat chambers to achieve efficient thermal control of the power battery module.

The beneficial effects of the utility model are:

1. The situation of severe heat generation and uneven temperature distribution inside the power battery module can be significantly improved by setting multiple vapor chambers, and the heat can be transferred from the inside of the battery module to the outside of the casing in a multi-level and efficient manner to realize the maintenance of the battery. Efficient thermal control of the module.

2. The use is implemented on the basis of industrialized production of high thermal conduction vapor chambers, and the cost is low.

3. The structure is simple and the requirements for assembly are not high.

Fourth, the parts involved do not require high precision and are easy to process.

Description of drawings

FIG. 1 is a schematic structural diagram of a power battery module;

Fig. 2 is a schematic structural diagram of a power battery module provided with liquid cooling;

Fig. 3 is a schematic structural diagram of a power battery module provided with an air cooling device.

In the figure: shell 1, battery core 2, frame heat dissipation structure 3, end vapor chamber 31, bottom vapor chamber 32, battery cell chamber chamber 33, liquid cold plate 4, fin heat dissipation structure 5, blower 6.

detailed description

In order to allow those skilled in the art to understand the utility model more clearly and intuitively, the utility model will be further described below in conjunction with the accompanying drawings.

Example 1

As shown in Figure 1, a power battery module includes a casing 1, a battery core 2, and a frame heat dissipation structure 3. The heat plate 33 and the frame cooling structure 3 are arranged around the battery module, the bottom vapor chamber 32 is inserted in the bottom slot of the casing 1, and the end vapor chamber 31 is inserted in the front and rear slots of the casing;

The end vapor chamber 31 and the bottom vapor chamber 32 are respectively in contact with the end and bottom of the battery module for heat transfer, and the inter-battery vapor chamber 33 is arranged side by side on the bottom vapor chamber 32, and two adjacent battery cells Between the chambers 33 is formed a compartment for placing the battery cells 2 , and the chambers 33 between the chambers are used to contact and transfer heat to the battery cells 2 on both sides.

There is contact between the end vapor chamber 31 and the bottom vapor chamber 32 , between the end vapor chamber 31 and the cell chamber chamber 33 , and between the bottom chamber chamber 32 and the cell chamber chamber 33 The position is filled with heat-conducting silicone grease or heat-conducting mud or heat-conducting potting glue and other heat-conducting soft materials on the market to fill the air gap and reduce thermal resistance. In addition, all positions where the vapor chamber is in contact with the casing 1 or the battery core 2 are also filled with heat-conducting soft materials such as heat-conducting silicone grease, heat-conducting mud, or heat-conducting potting glue on the market.

In the utility model, the end soaking plate 31 includes a front soaking plate and a rear soaking plate, and the front soaking plate, the rear soaking plate and the bottom soaking plate 32 are jointly arranged to form a U-shaped Frame structure, the vapor chambers 33 between battery cells are arranged in a "U"-shaped frame at intervals, the lower ends of the vapor chambers 33 between battery cells are in contact with the bottom vapor chamber 32, the front and rear ends of the vapor chambers 33 between battery cells are respectively In contact with the front vapor chamber and the rear vapor chamber, a compartment for setting the battery core 2 is formed between two adjacent vapor chambers 33 between battery cells.

Example 2

As shown in Figure 2, the improvement between this embodiment and Embodiment 1 is that the two ends and the bottom of the casing 1 are provided with a liquid cooling plate 4, and the cooling liquid in the liquid cooling plate can be set according to the different heating conditions of the power battery module. flow rate. This embodiment combines the high thermal conductivity of the phase change vapor chamber with the excellent heat dissipation performance of the traditional liquid cooling structure to achieve efficient thermal control of the power battery module.

Example 3

As shown in FIG. 3 , the improvement between this embodiment and Embodiment 1 is that the two ends of the shell 1 are provided with finned heat dissipation structures 5 , which greatly increase the convective heat exchange area between the heating element and the air. A blower 6 is installed next to the two fin heat dissipation structures 5 to strengthen the convective heat exchange process between the air and the power battery module, and combine the efficient temperature uniformity of the internal heat chambers to achieve efficient thermal control of the power battery module.

The above are only preferred embodiments of the utility model, and are not intended to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model shall be included in the utility model. within the scope of the new protection.

Claims (9)

1. The utility model provides a frame heat radiation structure, its characterized in that, soaking board between tip soaking board, bottom soaking board and a plurality of battery core, frame heat radiation structure sets up around the battery module, tip soaking board, bottom soaking board respectively with the tip and the bottom contact of battery module heat transfer, the soaking board sets up side by side on the soaking board of bottom between the battery core, forms the compartment groove that supplies the battery core to place between the soaking board between two adjacent battery cores, the soaking board is used for with the battery core contact heat transfer of both sides between the battery core.

2. The frame heat dissipation structure of claim 1, wherein the contact positions between the end soaking plate and the bottom soaking plate, between the end soaking plate and the battery cell soaking plate, and between the bottom soaking plate and the battery cell soaking plate are filled with heat conductive silicone grease or heat conductive mud or heat conductive potting adhesive.

3. The frame heat dissipation structure of claim 1, wherein the end vapor chamber comprises a front vapor chamber and a rear vapor chamber, the front vapor chamber, the rear vapor chamber and the bottom vapor chamber together enclose a frame structure in a "U" shape, the inter-cell vapor chambers are arranged in the "U" shape frame at intervals, the lower ends of the inter-cell vapor chambers contact the bottom vapor chamber, and the front and rear ends of the inter-cell vapor chambers contact the front vapor chamber and the rear vapor chamber respectively.

4. The utility model provides a power battery module, its characterized in that, includes shell, battery core and frame heat radiation structure, frame heat radiation structure includes tip soaking board, bottom soaking board and a plurality of battery core soaking board within a definite time, the bottom soaking board is inserted and is established in the bottom slot of shell, the tip soaking board is inserted and is established in the front end and/or the rear end slot of shell, the soaking board is located between the both ends of shell side by side between the battery core, form the compartment between the soaking board between the battery core, the battery core sets up in the compartment, the soaking board is respectively with tip, bottom and the lateral part contact of battery core and carry out heat transfer between tip soaking board, bottom soaking board and the battery core.

5. The power battery module as claimed in claim 4, wherein the contact positions between the end soaking plate and the bottom soaking plate, between the end soaking plate and the soaking plate between the battery cores, and between the bottom soaking plate and the soaking plate between the battery cores are filled with heat-conducting silicone grease or heat-conducting mud or heat-conducting pouring sealant.

6. The power battery module as claimed in claim 5, wherein the positions of all the soaking plates in contact with the housing or the battery core are filled with heat-conducting silicone grease, heat-conducting mud or heat-conducting potting adhesive.

7. The power battery module as claimed in claim 5, wherein liquid cooling plates are arranged at two ends and at the bottom of the housing.

8. The power battery module as claimed in claim 5, wherein the two ends of the housing are provided with fin heat dissipation structures.

9. The power battery module as claimed in claim 8, wherein fans are disposed beside the fin heat dissipation structures at the two ends.

Images