Phase change uniform temperature battery heat dissipation device

Abstract

The utility model belongs to the field of refrigerant gas-liquid two-phase phase change heat dissipation technology, especially a kind of phase change uniform temperature battery heat dissipation device, comprising: liquid cooling plate;U-shaped connecting pipe refrigerant passage is provided with two, two U-shaped connecting pipe refrigerant passage is respectively symmetrically arranged on the liquid cooling plate and position adjustable setting in the side close to two U-shaped connecting pipe refrigerant passage, U-shaped connecting pipe refrigerant passage and the heat exchange block inside are equipped with wick and the groove for containing wick in the heat exchange block, heat exchange block is filled with refrigerant medium, improves the uniform temperature effect.The utility model structure is simple, effectively prevent the problem that battery module local overheating and cooling liquid temperature rise along the way when liquid cooling radiates, effectively reduce the problem that refrigerant flow distribution is uneven when new energy automobile power battery adopts refrigerant direct cooling, temperature difference is large, ensure that power battery works in the appropriate temperature range, convenient for people to use.

Description

Technical Field

[0001] This utility model relates to the field of refrigerant gas-liquid two-phase change heat dissipation technology, and in particular to a phase change uniform temperature battery heat dissipation device. Background Technology

[0002] With the rapid development of new energy vehicles and the continuous increase in market penetration, the increase in battery capacity and the shortening of charging time have led to an increase in battery heat generation, which directly affects battery life and safety. Batteries generate a large amount of heat during operation, and if this heat is not dissipated in time, it may lead to thermal runaway or even fire. Therefore, efficient heat dissipation technology has become crucial for the development of new energy vehicles.

[0003] Currently, the mainstream thermal management methods used in power batteries generally rely on coolant (a mixture of water and ethylene glycol) or simple refrigerant as the heat exchange medium. These media circulate through closed channels made of aluminum plates to achieve heat transfer and management. However, the heat exchange efficiency of coolant is about 50% lower than that of direct refrigerant cooling, and coolant also experiences temperature rise along the flow path, further reducing its heat exchange performance. On the other hand, although direct refrigerant cooling has advantages in heat exchange efficiency, the multiphase nature of the refrigerant makes its physical properties difficult to control precisely. This can lead to excessive temperature differences within the cold plate, and the voltage drop of the entire system may also become excessive. These problems can cause the battery to become overcooled or overheated, thus seriously affecting the battery's lifespan and performance.

[0004] Current power battery thermal management methods still have certain shortcomings in terms of heat exchange efficiency and temperature control. Therefore, it is necessary to propose a phase change uniform temperature battery heat dissipation device to improve the heat exchange efficiency of power batteries and extend their service life. Utility Model Content

[0005] The purpose of this invention is to solve the problems of local overheating of battery modules and temperature rise of coolant along the flow path during liquid cooling, as well as the problems of uneven coolant flow distribution and large temperature difference when using refrigerant for direct cooling of power batteries in new energy vehicles. Therefore, a phase change uniform temperature battery cooling device is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A phase change homogeneous temperature battery heat dissipation device, comprising:

[0008] Liquid cooling plate;

[0009] There are two U-shaped refrigerant passages. The two U-shaped refrigerant passages are symmetrically arranged on the liquid cooling plate and are also adjustable on the side of the two U-shaped refrigerant passages that are close to each other. Both the U-shaped refrigerant passages and the heat exchange block are equipped with liquid suction cores and a groove in the heat exchange block for accommodating the liquid suction cores. The heat exchange block is used to fill the refrigerant medium, which improves the temperature uniformity.

[0010] A sealing ring is provided around the tank body to improve the sealing performance of the tank body. A heat exchange cover plate is embedded in the heat exchange block and the tank body.

[0011] Furthermore, a charging valve is installed on one side of the heat exchange block, and a sight glass for observing the liquid flow status is fixed on the side of the refrigerant passage of the U-shaped connecting pipe near the heat exchange block.

[0012] Furthermore, multiple temperature sensors are symmetrically distributed along the refrigerant passage of the U-shaped connecting pipe.

[0013] Furthermore, the liquid cooling plate has a coolant inlet and outlet at one end along its length.

[0014] Furthermore, the liquid cooling plate is provided with a coolant passage connected to the coolant inlet and outlet within the refrigerant passage ring of the U-shaped connecting pipe.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] 1. In this design, the heat exchange block is placed at the center of the liquid cooling plate to absorb heat, and the U-shaped tube extends to the perimeter of the liquid cooling plate to dissipate heat, thereby achieving heat dissipation and temperature uniformity.

[0017] 2. The position of the heat exchange blocks in this solution is adjustable, and they are connected by U-shaped pipes to form a passage for filling with cold medium. The structure is simplified and the temperature uniformity is significant.

[0018] 3. In this design, the liquid suction core is made of steel wire mesh, which allows the refrigerant to circulate in a two-phase flow to achieve a uniform temperature. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a phase change uniform temperature battery heat dissipation device proposed in this utility model.

[0021] Figure 2 This is a schematic diagram of the liquid exchange block part of a phase change uniform temperature battery heat dissipation device proposed in this utility model.

[0022] Figure 3 This is a schematic diagram of the flow trajectory of the refrigerant and coolant in a phase change uniform temperature battery heat dissipation device proposed in this utility model.

[0023] The correspondence between the numbers in the attached diagram is as follows:

[0024] 1. Liquid cooling plate; 2. Heat exchange block; 3. Heat exchange cover plate; 4. Filling valve; 5. Sealing ring; 6. Sight glass; 7. Liquid suction core; 8. Temperature sensor; 9. U-shaped connecting pipe refrigerant passage; 10. Coolant inlet and outlet; 11. Coolant passage. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1-3 A phase change uniform temperature battery heat dissipation device, comprising:

[0027] Liquid cooling plate 1;

[0028] There are two U-shaped connecting pipe refrigerant passages 9. The two U-shaped connecting pipe refrigerant passages 9 are symmetrically arranged on the liquid cooling plate 1 and are also adjustablely arranged on the side of the two U-shaped connecting pipe refrigerant passages 9 that are close to each other. Both the U-shaped connecting pipe refrigerant passages 9 and the heat exchange block 2 are equipped with liquid suction cores 7 and a tank in the heat exchange block 2 for accommodating the liquid suction cores 7.

[0029] A sealing ring 5 is arranged around the tank body. A heat exchange cover plate 3 is embedded in the heat exchange block 2 and the tank body. The heat exchange cover plate 3 can limit and protect the heat exchange block 2.

[0030] In this embodiment, a charging valve 4 is installed on one side of the heat exchange block 2, and a sight glass 6 for observing the liquid flow status is fixed on the side of the U-shaped connecting pipe refrigerant passage 9 near the heat exchange block 2. Multiple temperature sensors 8 are symmetrically distributed on the U-shaped connecting pipe refrigerant passage, and the temperature sensors 8 can monitor the temperature of the coolant flowing in the U-shaped connecting pipe refrigerant passage 9 in real time.

[0031] In this embodiment, a coolant inlet / outlet 10 is provided at one end of the liquid cooling plate 1 along the length direction, and a coolant passage 11 connected to the coolant inlet / outlet 10 is provided on the liquid cooling plate 1 within the refrigerant passage 9 of the U-shaped connecting pipe.

[0032] The implementation principle of the phase change uniform temperature battery heat dissipation device in this application embodiment is as follows: Under working conditions, coolant enters through the coolant inlet and flows in the refrigerant passage 9 of the U-shaped connecting pipe. The sight glass 6 can observe the coolant flowing in the refrigerant passage 9 of the U-shaped connecting pipe. At the same time, the coolant carries away the heat dissipated by the battery module. The temperature sensor 8 can monitor the temperature in real time. The heat exchange block 2 can absorb the heat transferred by the coolant. The internal refrigerant (liquid) evaporates into gas when heated, absorbing a large amount of heat and reducing the temperature of the heat exchange block 2 and the surrounding area, avoiding local overheating. At the same time, in order to prevent local overheating of the battery module and the problem of temperature rise of the coolant along the path, the refrigerant passage is circulated through the gas-liquid two-phase change of the refrigerant and the refrigerant through the action of the liquid suction core 7 to achieve the uniform temperature effect. The sealing ring 5 and the heat exchange cover plate 3 can prevent the coolant from flowing out when the coolant passes through the heat exchange block 2, thus improving the sealing performance.

[0033] All structures in this application can be customized in terms of material and length according to actual usage. The attached drawings are schematic structural diagrams, and the actual dimensions can be adjusted accordingly.

[0034] The above description is only a preferred embodiment of this practice, but the scope of protection of this embodiment is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in this embodiment, based on the technical solution and the inventive concept of this embodiment, should be covered within the scope of protection of this embodiment.

Claims

1. A phase change uniform temperature battery heat dissipation device, characterized in that, include: Liquid cooling plate; There are two U-shaped connecting pipe refrigerant passages. The two U-shaped connecting pipe refrigerant passages are symmetrically arranged on the liquid cooling plate and are also adjustablely arranged on the side of the two U-shaped connecting pipe refrigerant passages that are close to each other. The U-shaped connecting pipe refrigerant passages and the heat exchange block are both provided with liquid suction cores and a tank in the heat exchange block for accommodating the liquid suction cores. A sealing ring is provided around the tank body, and a heat exchange cover plate is embedded in the heat exchange block and the tank body.

2. The phase change uniform temperature battery heat dissipation device according to claim 1, characterized in that, A charging valve is installed on one side of the heat exchange block, and a sight glass for observing the liquid flow status is fixed on the side of the refrigerant passage of the U-shaped connecting pipe near the heat exchange block.

3. The phase change uniform temperature battery heat dissipation device according to claim 1, characterized in that, Multiple temperature sensors are symmetrically distributed along the refrigerant passage of the U-shaped connecting pipe.

4. The phase change uniform temperature battery heat dissipation device according to claim 1, characterized in that, The liquid cooling plate has a coolant inlet and outlet at one end along its length.

5. The phase change uniform temperature battery heat dissipation device according to claim 4, characterized in that, The liquid cooling plate is provided with a coolant passage located within the refrigerant passage ring of the U-shaped connecting pipe, which is connected to the coolant inlet and outlet.

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