Cooling plate for high-thermal-conductivity power battery module and liquid cooling circulation system

Abstract

The utility model relates to the technical field of power battery modules, in particular to a cooling plate for a high-thermal-conductivity power battery module and a liquid cooling circulation system. A cooling mechanism is arranged at one end of the power battery and comprises a cooling plate, the cooling plate is movably connected to the bottom end of the power battery, a mounting hole is formed in the cooling plate, a heat conducting plate is movably connected to the cooling plate, a mounting rod is connected to the heat conducting plate, and the mounting rod structurally corresponds to the mounting hole. The cooling grooves and the mounting holes are matched with each other to form a structure similar to a Tesla valve, so that the flow velocity of the cooling liquid can be reduced under the condition of the same power, the contact time between the cooling liquid and the cooling plate and the contact time between the cooling liquid and the heat conducting plate are fully prolonged, and the cooling efficiency of the power battery is improved; the contact area between the cooling plate and the heat conducting plate can be increased through the mounting holes and the mounting rods, the heat exchange area between the cooling plate and the heat conducting plate is increased, the heat exchange efficiency is improved, and the high heat conducting effect on the power battery module is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of power battery modules, in particular to a cooling plate and a liquid cooling circulation system for a high thermal conductivity power battery module. Background Art

[0002] As the main power source of electric vehicles, power batteries have been rapidly applied and developed. The overall performance of power batteries is significantly affected by temperature. At high temperatures, the active substances of the battery are enhanced, and irreversible chemical reactions may occur, causing thermal runaway and then causing the vehicle to catch fire and explode. When the temperature difference is large, local hot zones will be formed, and the high temperature will decay too quickly, resulting in a reduction in the battery cycle life. Therefore, effectively controlling the battery temperature for reasonable heat exchange is the main focus of the battery thermal management system design. At present, air, liquid or phase change materials are mainly used to design power battery thermal management systems. Among them, the air-cooled structure has the lowest manufacturing cost and can effectively ventilate when the battery produces harmful gases, but it is limited by the low thermal conductivity of air, especially in high temperature environments or high current discharge conditions of the battery. The air-cooled system cannot meet the thermal management requirements of the battery system, and the heat dissipation structure designed with phase change materials is complex and the volume is increased, which cannot meet the design requirements of the compact battery pack structure. Therefore, the widespread use of liquid cooling structure for high-temperature heat dissipation of batteries has become the mainstream of vehicle thermal management structure design, and has great development potential.

[0003] The utility model patent with publication number CN 212303803 U discloses a non-modular battery pack with a liquid-cooled structure for a power system. In this solution, a buckle plate is set to fix the battery cells in a row, and then the liquid cooling plate is inserted between the battery cells in a row for heat dissipation. There is no need to set an additional bracket for each battery cell, thereby improving the energy density of the battery pack. The battery pack is easy to install and can effectively reduce costs. A limiting groove is set inside the lower box to fix the battery cells in a row to prevent them from moving. An isolation layer is set inside the liquid cooling plate to realize internal circulation of the coolant, which is convenient for rapid heat dissipation. The optimized non-modular structure adopts the side installation method of the liquid cooling plate, which improves the use of space, improves the energy density and effectively improves the life of the battery cells with thermal management, while achieving a high degree of integration of the lightweight power battery system.

[0004] However, there are still some shortcomings in the above scheme. The liquid cooling plate in the above scheme cools the liquid cooling plate and the battery through the flow channel inside the liquid cooling plate, and the battery pack is usually small in size, so the coolant flows in the flow channel for a short time, and the heat exchange time between the coolant and the cooling plate and the battery plate is short, so the heat exchange efficiency of the coolant to the battery plate is low. In view of this, we propose a cooling plate and liquid cooling circulation system for a high thermal conductivity power battery module. Utility Model Content

[0005] The purpose of the utility model is to provide a cooling plate and a liquid cooling circulation system for a high thermal conductivity power battery module, which solves the problem of low heat exchange efficiency caused by a short liquid cooling plate in the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A cooling plate and liquid cooling circulation system for a high thermal conductivity power battery module, comprising a power battery;

[0008] A cooling mechanism is provided at one end of the power battery, and the cooling mechanism includes a cooling plate, which is movably connected to the bottom end of the power battery, and a mounting hole is opened on the cooling plate, and a heat conducting plate is movably connected to the cooling plate, and a mounting rod is connected to the heat conducting plate, and the mounting rod and the mounting hole structure correspond to each other.

[0009] Preferably, the mounting hole is a triangular prism structure, an angle of one side of the mounting hole is greater than 90°, and an edge of the mounting hole is an arc structure.

[0010] Preferably, the heat conducting plate is an "L"-shaped structure, the mounting rod is fixedly connected to the bottom end of the heat conducting plate, and a limiting groove corresponding to the mounting rod structure is provided on the heat conducting plate.

[0011] Preferably, the power battery is provided with a mounting mechanism, the mounting mechanism includes a mounting plate, the mounting plate is movably connected to one end of the power battery away from the cooling plate, a mounting groove is opened on the mounting plate, and a mounting block corresponding to the mounting groove structure is fixedly connected to the top of the heat conducting plate.

[0012] Preferably, a buffer pad is fixedly connected to the inner side of the mounting plate, and the buffer pad is a wedge-shaped structure. Screw holes are provided at both ends of the mounting plate and both ends of the cooling plate, and screw rods are meshedly connected in the screw holes.

[0013] Preferably, the mounting plate is an "L"-shaped structure, a limiting rod is fixedly connected to the inner side of the mounting plate, both ends of the limiting rod are respectively passed through two mounting plates, a positioning rod is rotatably connected inside the mounting plate, and the positioning rod and the limiting rod are engaged with each other.

[0014] Preferably, it includes a cooling box for storing and supplying coolant to the cooling plate, a cooling tank for guiding the flow of the coolant, a pump for driving the flow of the coolant, and a heat exchanger for cooling the coolant flowing out of the cooling plate and circulating it to the cooling box.

[0015] By means of the above technical solution, the utility model provides a cooling plate and a liquid cooling circulation system for a high thermal conductivity power battery module, which has at least the following beneficial effects:

[0016] (1) The cooling groove and the mounting hole provided in the utility model cooperate with each other to form a structure similar to a Tesla valve, so that the flow rate of the coolant can be reduced under the same power conditions, thereby fully extending the contact time between the coolant and the cooling plate and the heat conduction plate, thereby improving the cooling efficiency of the power battery.

[0017] (2) The utility model can increase the contact area between the cooling plate and the heat conducting plate by providing the mounting holes and the mounting rod structure, thereby increasing the heat exchange area between the cooling plate and the heat conducting plate, and further increasing the heat exchange efficiency between the cooling plate and the heat conducting plate, thereby achieving a high thermal conductivity effect on the power battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0019] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 ;

[0020] Figure 2 The overall structure of the utility model is shown in FIG. Figure 2 ;

[0021] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the cooling plate of the utility model;

[0023] Figure 5 The heat conducting plate structure of the utility model is shown in FIG. Figure 1 ;

[0024] Figure 6 The heat conducting plate structure of the utility model is shown in FIG. Figure 2 .

[0025] In the figure: 1. power battery; 2. cooling mechanism; 201. cooling plate; 202. mounting hole; 203. heat conducting plate; 204. mounting rod; 205. limiting groove; 3. mounting mechanism; 301. mounting plate; 302. mounting groove; 303. mounting block; 304. buffer pad; 305. screw hole; 306. screw rod; 307. limiting rod; 308. positioning rod; 4. cooling box; 5. cooling groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example 1

[0028] A cooling plate and liquid cooling circulation system for a high thermal conductivity power battery module, such as Figure 1-Figure 6As shown, it includes a power battery 1; a cooling mechanism 2 is provided at one end of the power battery 1, and the cooling mechanism 2 includes a cooling plate 201, the cooling plate 201 is movably connected to the bottom end of the power battery 1, and a mounting hole 202 is opened on the cooling plate 201, and a heat conducting plate 203 is movably connected to the cooling plate 201, and a mounting rod 204 is connected to the heat conducting plate 203, and the mounting rod 204 corresponds to the mounting hole 202 structure. The cooling mechanism 2 can cool the power battery 1, thereby reducing the temperature of the outer side of the power battery 1, avoiding the outer side of the power battery 1 The temperature is too high, which causes the aging of the power battery 1 to accelerate, and avoids the risk of explosion or combustion of the power battery 1 under high temperature. The mounting hole 202 structure can install and fix the heat conducting plate 203, so that the heat conducting plate 203 can be installed and fixed. The plate 203 can be inserted into the mounting hole 202 through the mounting rod 204. At the same time, the mounting hole 202 structure increases the contact area between the cooling plate 201 and the heat conducting plate 203, thereby improving the heat exchange rate between the cooling plate 201 and the heat conducting plate 203, and improving the cooling rate of the power battery 1 by the cooling plate 201. The mounting hole 202 is a triangular prism structure, and the angle of one side of the mounting hole 202 is greater than 90°. The edge of the mounting hole 202 is an arc structure. The mounting hole 202 with an arc edge structure can facilitate the installation of the rod 204. The heat conducting plate 203 is an "L"-shaped structure. The mounting rod 204 is fixedly connected to the bottom end of the heat conducting plate 203. The heat conducting plate 203 is provided with a limiting groove 205 corresponding to the mounting rod 204 structure. The L-shaped heat conducting plate 203 can cover and wrap the bottom and side of the power battery 1, so as to improve the heat exchange efficiency between the heat conducting plate 203 and the power battery 1. At the same time, the two heat conducting plates 203 are respectively attached to the top and bottom of the cooling plate 201, so as to effectively utilize the two cooling sides for cooling and cooling, and avoid that one side of the cooling plate 201 is idle to reduce the cooling efficiency of the cooling plate 201. It includes a cooling box 4 for storing and supplying coolant to the cooling plate 201, a cooling tank 5 for guiding the flow of the coolant, a pump for driving the flow of the coolant, and a heat exchanger for cooling the coolant flowing out of the cooling plate 201 and circulating it to the cooling box 4. The cooling tank 5 is arranged around the outside of the mounting hole 202, and the structure of the cooling tank 5 is the same as that of the mounting hole 202. Correspondingly, the thickness of the cooling plate 201 between the mounting hole 202 and the cooling groove 5 is kept uniform, thereby improving the heat exchange efficiency between the coolant in the cooling groove 5 and the mounting rod 204 in the mounting hole 202. At the same time, the mounting hole 202 is a triangular prism structure, so that the cooling groove 5 forms a structure similar to a Tesla valve, which can reduce the flow rate of the coolant flowing in the cooling groove 5 and extend the heat exchange time between the coolant and the mounting rod 204. The mounting groove 302 with an obtuse triangle structure can separate the coolant flowing in the cooling groove 5 into a main stream and a tributary through an acute angle on one side. The main stream of the coolant flows along the short side of the mounting hole 202, that is, it flows from the acute angle to the obtuse angle, while the tributary of the coolant flows along the long side, that is, it flows from the acute angle on one side to the acute angle on the other side.And finally, a reverse liquid flow is formed from the other acute angle and flows to the obtuse angle to impact the main coolant flow, achieving a reduction in the coolant flow rate. By reducing the coolant flow rate, the heat exchange time with the heat conduction plate 203 is increased. The mounting holes 202 with an arc-shaped structure can facilitate the flow of the coolant. There are two cooling boxes 4 and heat exchangers, which are symmetrically connected to both sides of the cooling plate 201. The heat exchangers are respectively connected to two cooling grooves 5. After the low-temperature coolant flows and exchanges heat along the cooling groove 5 from the heat exchanger, the coolant can be directly cooled again by the heat exchanger at the other end.

[0029] Embodiment 2

[0030] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 As shown in Figure 1 , Figure 2 , Figure 3 , Figure 5 , a mounting mechanism 3 is provided on the power battery 1. The mounting mechanism 3 includes a mounting plate 301. The mounting plate 301 is movably connected to one end of the power battery 1 away from the cooling plate 201. A mounting groove 302 is formed on the mounting plate 301. A mounting block 303 corresponding to the structure of the mounting groove 302 is fixedly connected to the top end of the heat conduction plate 203. The mounting mechanism 3 can clamp and fix the heat conduction plate 203, so that the power battery 1 and the heat conduction plate 203 are kept in a tight contact state. The structure of the mounting plate 301 can limit the heat conduction plate 203, so that the mounting block 303 at the top end of the heat conduction plate 203 is fixed through the mounting groove 302. A buffer pad 304 is fixedly connected to the inner side of the mounting plate 301. The buffer pad 304 is of a wedge-shaped structure. Screw holes 305 are formed at both ends of the mounting plate 301 and both ends of the cooling plate 201. A screw rod 306 is engaged in the screw hole 305. The structure of the buffer pad 304 can improve the fitting effect between the heat conduction plate 203 and the power battery 1, and at the same time can buffer the heat conduction plate 203, avoiding damage to the power battery 1 caused by excessive extrusion force of the heat conduction plate 203 on the side of the power battery 1. The mounting plate 301 is of an "L" - shaped structure. A limiting rod 307 is fixedly connected to the inner side of the mounting plate 301. Both ends of the limiting rod 307 pass through the two mounting plates 301 respectively. A positioning rod 308 is rotatably connected inside the mounting plate 301. The positioning rod 308 is engaged with the limiting rod 307. The "L" - shaped mounting plates 301 can be spliced with each other to form a mounting structure in a "冂" - shaped structure and wrap and cover one end of the power battery 1. At the same time, the distance between the mounting plates 301 can be conveniently adjusted to adapt to the use of power batteries 1 with different widths. The heat conduction plate 203 can adjust the mounting position of the heat conduction plate 203 by inserting different numbers of mounting rods 204, and further can adjust the distance between the two heat conduction plates 203 to achieve cooling of power batteries 1 with different widths.

[0031] When using a cooling plate and liquid cooling circulation system for a high thermal conductivity power battery module of the utility model, the heat conducting plate 203 on one side is inserted into the mounting groove 302 of the cooling plate 201 through the mounting rod 204, and the heat conducting plate 203 on the other side is removed into the mounting groove 302 of the cooling plate 201 and the limiting groove 205 of the heat conducting plate 203 through the mounting rod 204. At the same time, the mounting plate 301 is placed on the power battery 1 and the positioning rod 308 is rotated. The positioning rod 308 drives the mounting plate 301 to move and adjust through the engaged limiting rod 307, so that the limiting rod 307 of the mounting plate 301 on one side slides inside the mounting plate 301 on the other side to adjust the spacing between the mounting plates 301. After the installation of the cooling structure is completed, the heat exchanger and the pump are started, and the coolant flows in the cooling groove 5. During the flow, the coolant exchanges heat and cools the power battery 1 through the cooling plate 201 and the heat conducting plate 203.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling plate for a high thermal conductivity power battery module, comprising a power battery (1), characterized in that: A cooling mechanism (2) is provided at one end of the power battery (1), the cooling mechanism (2) comprising a cooling plate (201), the cooling plate (201) being movably connected to the bottom end of the power battery (1), a mounting hole (202) being provided on the cooling plate (201), a heat conducting plate (203) being movably connected to the cooling plate (201), a mounting rod (204) being connected to the heat conducting plate (203), the mounting rod (204) and the mounting hole (202) corresponding in structure to each other.

2. A cooling plate for a high thermal conductivity power battery module according to claim 1, characterized in that: The mounting hole (202) is a triangular prism structure, the angle of one side of the mounting hole (202) is greater than 90°, and the edge of the mounting hole (202) is an arc-shaped structure.

3. A cooling plate for a high thermal conductivity power battery module according to claim 1, characterized in that: The heat conducting plate (203) is an "L"-shaped structure, the mounting rod (204) is fixedly connected to the bottom end of the heat conducting plate (203), and a limiting groove (205) corresponding to the mounting rod (204) structure is provided on the heat conducting plate (203).

4. A cooling plate for a high thermal conductivity power battery module according to claim 1, characterized in that: The power battery (1) is provided with a mounting mechanism (3), the mounting mechanism (3) comprising a mounting plate (301), the mounting plate (301) being movably connected to an end of the power battery (1) away from the cooling plate (201), the mounting plate (301) being provided with a mounting groove (302), and a mounting block (303) corresponding to the mounting groove (302) structure being fixedly connected to the top end of the heat conducting plate (203).

5. A cooling plate for a high thermal conductivity power battery module according to claim 4, characterized in that: A buffer pad (304) is fixedly connected to the inner side of the mounting plate (301), and the buffer pad (304) is a wedge-shaped structure. Screw holes (305) are provided at both ends of the mounting plate (301) and both ends of the cooling plate (201), and screw rods (306) are meshedly connected in the screw holes (305).

6. A cooling plate for a high thermal conductivity power battery module according to claim 4, characterized in that: The mounting plate (301) is an "L"-shaped structure. A limiting rod (307) is fixedly connected to the inner side of the mounting plate (301). Two ends of the limiting rod (307) pass through two mounting plates (301) respectively. A positioning rod (308) is rotatably connected to the inside of the mounting plate (301). The positioning rod (308) and the limiting rod (307) are meshed with each other.

7. A liquid cooling circulation system for a high thermal conductivity power battery module, characterized in that: It comprises a cooling plate (201) as described in any one of claims 1 to 6, a cooling box (4) for storing and supplying cooling liquid to the cooling plate (201), a cooling trough (5) for guiding the flow of the cooling liquid, a pump for driving the flow of the cooling liquid, and a heat exchanger for cooling the cooling liquid flowing out of the cooling plate (201) and circulating it to the cooling box (4).

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