Cooling plate assembly for cooling power battery liquid

Abstract

The invention belongs to the technical field of battery heat dissipation, and particularly relates to a cooling plate assembly for cooling power battery liquid. The battery pack comprises a water inlet chamber, a water outlet chamber, a battery module and a plurality of water replenishing chambers positioned between the water inlet chamber and the water outlet chamber, wherein the battery modules are arranged between the water inlet chamber and the water replenishing chambers, between the adjacent water replenishing chambers and between the water replenishing chambers and the water outlet chamber; a water inlet is formed in the water inlet chamber, a water outlet is formed in the water outlet chamber, a plurality of groups of cooling plates with hollow structures are mounted between the water replenishing chamber and the water inlet chamber and between the water replenishing chamber and the water outlet chamber, and the cooling plates are used for absorbing heat of the battery module; a battery jar is formed between every two adjacent groups of cooling plates, and the battery modules are mounted in the battery jars; according to the invention, the plurality of cooling plates are arranged between each group of battery modules, so that the adjacent battery modules can be separated, and the heat of the battery modules is taken away when the cooling liquid flows through the cooling plates, so that the problem that the heat is gathered and cannot be dissipated due to mutual contact between the battery modules is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery heat dissipation, and particularly to a cooling plate assembly for liquid cooling of power batteries. Background Art

[0002] Since the ambient temperature of the power battery system and the temperature of the battery itself will directly affect the normal operation, cycle life, charging acceptability, output power, available energy, safety, and reliability of the battery, in order to enable the battery to achieve the best performance and life, it is necessary to introduce a thermal management system to perform low-temperature heating, high-temperature heat dissipation, and heat preservation management on the battery, so as to limit the temperature rise and temperature difference of the battery, realize the temperature uniformity of the battery pack, ensure that the battery works within an appropriate temperature range, reduce the attenuation of battery performance, and eliminate other potential safety risks.

[0003] Currently, for the liquid cooling plate assemblies of power batteries on the market, the liquid cooling plates are all placed at the bottom of the battery pack, and the cooling effect on the battery is average. None of them can make the power battery relatively isothermal or isothermal, effectively take away the heat at the bottom of the power battery, while the heat dissipation of the middle and top of the battery is slow; thus affecting the power storage capacity and discharge capacity of the power battery. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a cooling plate assembly for liquid cooling of power batteries. By providing a cooling plate between battery modules to cool and dissipate heat from the middle of the battery, it aims to solve the problems in the background art.

[0005] To achieve the above technical purpose, the specific technical solution of the present invention is as follows. A cooling plate assembly for liquid cooling of power batteries proposed by the present invention includes: a water inlet chamber, a water outlet chamber, battery modules, and a plurality of water replenishing chambers located between the water inlet chamber and the water outlet chamber; wherein, the battery modules are arranged between the water inlet chamber and the water replenishing chambers, between adjacent water replenishing chambers, and between the water replenishing chambers and the water outlet chamber; the water inlet chamber is provided with a water inlet, the water outlet chamber is provided with a water outlet, and a plurality of groups of hollow-structured cooling plates are installed between the water replenishing chambers and the water inlet chamber and the water outlet chamber. The cooling plates are used to absorb the heat of the battery modules; and a battery slot is formed between adjacent groups of cooling plates, and the battery modules are installed in the battery slots.

[0006] As a preferred technical solution of the present invention, a plurality of water replenishing pipes are installed on the water inlet chamber, a plurality of water replenishing branch pipes are fixedly connected to the water replenishing pipes, the water replenishing branch pipes are connected to the water replenishing chambers, and a first micro solenoid valve is installed on the water replenishing branch pipes to control the opening and closing of the water replenishing branch pipes.

[0007] As a preferred technical solution of the present invention, a plurality of water exchange pipes are installed on the water outlet chamber, a plurality of water exchange branch pipes are fixedly connected to the water exchange pipes, the water exchange branch pipes are connected to the water replenishing chambers, and a second micro solenoid valve is installed on the water exchange branch pipes to control the opening and closing of the water exchange branch pipes.

[0008] As a preferred technical solution of the present invention, a first water chamber and a second water chamber which are independent of each other are respectively arranged in the water replenishing chamber in the left-right direction; wherein, the water replenishing branch pipe is connected to the second water chamber, and the water changing branch pipe is connected to the first water chamber; a valve hole is arranged between the first water chamber and the second water chamber, and a valve plate is rotatably connected in the valve hole for sealing the valve hole, and a micro motor for driving the valve plate to rotate is installed outside the water replenishing chamber.

[0009] As a preferred technical solution of the present invention, a side cover is hermetically and fixedly installed on one side surface of the water inlet chamber, a plurality of first through holes corresponding to the cooling plates one by one are arranged on the surface of the side cover, and longitudinal staggered ribs are arranged on the inner wall of the water inlet chamber; wherein, the structure of the water outlet chamber is the same as that of the water inlet chamber.

[0010] As a preferred technical solution of the present invention, a pair of end covers are hermetically and fixedly installed at both ends of the water replenishing chamber, and a plurality of second through holes corresponding to the cooling plates one by one are arranged on both surfaces of the water replenishing chamber; As a preferred technical solution of the present invention, a heat conducting pad is installed on each group of cooling plates, the heat conducting pad comprises two fixedly connected heat conducting plates, and a receiving groove matched with the cooling plate is arranged between the two heat conducting plates, and the inner and outer surfaces of the heat conducting plates are respectively in contact with the surfaces of the cooling plate and the battery module.

[0011] As a preferred technical solution of the present invention, a first heat dissipation groove and a second heat dissipation channel are respectively arranged on the inner and outer surfaces of the heat conducting plate, and a heat dissipation opening is arranged at the top of the receiving groove.

[0012] As a preferred technical solution of the present invention, a plurality of layered partition plates are arranged inside the cooling plate, and a plurality of heat dissipation teeth are uniformly distributed on the inner wall of the cooling plate.

[0013] The beneficial effects in the present invention are as follows:

[0014] 1. By providing a water inlet chamber, a water outlet chamber and a plurality of water replenishing chambers, and arranging a plurality of cooling plates between each group of battery modules, the present invention can separate adjacent battery modules, and the heat of the battery modules is taken away when the coolant flows through the cooling plates, solving the problem that the heat accumulates and cannot be dissipated due to the mutual contact between the battery modules.

[0015] 2. By connecting a water replenishing pipe between the water inlet chamber and the water replenishing chamber, and connecting a water changing pipe between the water outlet chamber and the water replenishing chamber, and continuously replenishing the water replenishing chamber in the middle with a coolant at a lower temperature through the water inlet chamber, the temperature of the coolant will not be too high during the heat exchange process, thereby improving the effect of cooling the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0017] Figure 2 This is the front view schematic diagram of the present invention.

[0018] Figure 3 This is the exploded schematic diagram of the present invention.

[0019] Figure 4 This is the schematic diagram of the water inlet chamber, water replenishing chamber and water outlet chamber of the present invention.

[0020] Figure 5 is Figure 4 the schematic diagram from another angle of

[0021] Figure 6 This is the structural schematic diagram of the water replenishing chamber proposed by the present invention.

[0022] Figure 7 This is the sectional view schematic diagram of the water replenishing chamber proposed by the present invention.

[0023] Figure 8 This is the structural schematic diagram of the water inlet chamber proposed by the present invention.

[0024] Figure 9 This is the sectional view schematic diagram of the water inlet chamber proposed by the present invention.

[0025] Figure 10 This is the structural schematic diagram of the heat conduction pad proposed by the present invention.

[0026] Figure 11 This is the structural schematic diagram of the cooling plate proposed by the present invention.

[0027] The corresponding names of the reference numerals in the figure are as follows: 1, water inlet chamber; 101, water inlet; 102, first through hole; 103, rib; 104, side cover; 2, water outlet chamber; 201, water outlet; 3, water replenishing chamber; 301, end cover; 302, second through hole; 303, micro motor; 304, first water chamber; 305, second water chamber; 306, valve plate; 307, valve hole; 4, heat conduction pad; 401, heat conduction plate; 402, accommodation groove; 403, heat dissipation opening; 404, first heat dissipation groove; 405, second heat dissipation channel; 5, cooling plate; 501, partition board; 502, heat dissipation teeth; 6, battery module; 7, water replenishing pipe; 701, water replenishing branch pipe; 702, first micro solenoid valve; 8, water changing pipe; 801, water changing branch pipe; 802, second micro solenoid valve. Detailed Embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0029] Embodiment 1: AsFigures 1 - 11 As shown in the figure, this embodiment discloses a cooling plate assembly for liquid cooling of a power battery, including: an inlet chamber 1, an outlet chamber 2, a battery module 6, and a plurality of water replenishing chambers 3 located between the inlet chamber 1 and the outlet chamber 2. In this embodiment, there are three water replenishing chambers 3; among them, the battery module 6 is disposed between the inlet chamber 1 and the water replenishing chamber 3, between adjacent water replenishing chambers 3, and between the water replenishing chamber 3 and the outlet chamber 2; an inlet port 101 is provided on the inlet chamber 1, and an outlet port 201 is provided on the outlet chamber 2. Both the inlet port 101 and the outlet port 201 are connected to the water pipes of an external cooling system, and a water pump can be installed on the water pipe. The water pump provides power for the flow of the coolant; a plurality of groups of hollow-structured cooling plates 5 are installed between the water replenishing chamber 3 and the inlet chamber 1 and the outlet chamber 2. Each group of cooling plates 5 has three cooling plates 5, namely, an upper, a middle, and a lower cooling plate 5, which are respectively in contact with the upper, middle, and lower parts of the battery module 6; and a battery slot is formed between adjacent groups of cooling plates 5, and the battery module 6 is installed in the battery slot; the coolant enters the inlet chamber 1 through the inlet port 101, then flows into the water replenishing chamber 3 through the cooling plate 5, and finally flows into the outlet chamber 2 and flows out through the outlet port 201. When the coolant flows through the cooling plate 5, the heat on the surface of the battery module 6 is carried away to cool the battery module; in this embodiment, by providing the cooling plate 5 on the side of the battery module 6, the cooling plate 5 can separate adjacent battery modules 6 and take away the heat on the surface of the battery module 6, and the cooling effect is good, solving the problem that the heat cannot dissipate due to the mutual contact between the battery modules 6.

[0030] As Figure 6 As shown in the figure, a pair of end caps 301 are hermetically and fixedly installed at both ends of the water replenishing chamber 3, and a plurality of second through holes 302 corresponding to the cooling plates 5 one by one are provided on both sides of the water replenishing chamber 3. The cooling plate 5 is fixedly connected to the second through hole 302 by welding.

[0031] As Figure 8 As shown in the figure, a side cover 104 is hermetically and fixedly installed on one side surface of the inlet chamber 1. A plurality of first through holes 102 corresponding to the cooling plates 5 one by one are provided on the surface of the side cover 104. The cooling plate 5 is fixedly connected to the first through hole 102 by welding, and longitudinal staggered ribs 103 are provided on the inner wall of the inlet chamber 1 to increase the structural strength of the inlet chamber 1; among them, the structure of the outlet chamber 2 is the same as that of the inlet chamber 1.

[0032] As Figure 10 ​As shown in the figure, to improve the heat transfer effect between the battery module 6 and the cooling plate 5, a heat conducting pad 4 is installed on each cooling plate 5. The heat conducting pad 4 includes two heat conducting plates 401 fixedly connected. The upper ends of the two heat conducting plates 401 are fixedly connected, and a receiving groove 402 for cooperating with the cooling plate 5 is provided between the two heat conducting plates 401. The width of the receiving groove 402 is the same as the thickness of the cooling plate 5. The inner and outer surfaces of the heat conducting plate 401 are respectively in contact with the surfaces of the cooling plate 5 and the battery module 6. The heat of the battery module 6 is transferred to the cooling plate 5 through the heat conducting plate 401. The inner and outer surfaces of the heat conducting plate 401 are respectively provided with a first heat dissipation groove 404 and a second heat dissipation channel 405. The first heat dissipation groove 404 and the second heat dissipation channel 405 are staggered. And a heat dissipation opening 403 is provided at the top of the receiving groove 402. Through the design of the first heat dissipation groove 404 and the second heat dissipation channel 405, a heat dissipation air flow channel is formed between the heat conducting pad 4 and the battery module 6 and the cooling plate 5. The air flow can flow between the battery modules 6. The heat of the battery module 6 and the cooling plate 5 is dissipated through the first heat dissipation groove 404 and the second heat dissipation channel 405, and finally dissipated from the heat dissipation opening 403.

[0033] As Figure 11 shown, a plurality of layered partition plates 501 are provided inside the cooling plate 5, so that the coolant flows in layers, and a plurality of heat dissipation teeth 502 are evenly distributed on the inner wall of the cooling plate 5, increasing the contact area between the cooling plate 5 and the coolant and improving the heat transfer efficiency.

[0034] Embodiment 2: Based on the structure of the above Embodiment 1, since the coolant continuously absorbs heat during the flow in the cooling plate 5, after passing through 1-2 water replenishing chambers, the temperature of the coolant gradually increases, resulting in good cooling effect of the battery module 6 near the water inlet chamber 1, while the cooling effect of the battery module 6 near the water outlet chamber 2 is low, and the cooling of the battery module 6 is uneven. To solve this problem, in this embodiment Figures 4 - 5 and Figure 7 shown, a plurality of water replenishing pipes 7 are installed on the water inlet chamber 1. A plurality of water replenishing branch pipes 701 are fixedly connected to the water replenishing pipes 7. The water replenishing branch pipes 701 are connected to the water replenishing chamber 3, and a first micro solenoid valve 702 is installed on the water replenishing branch pipes 701 to control the opening and closing of the water replenishing branch pipes 701. The water inlet chamber 1 can supplement the coolant with a lower temperature into the water replenishing chamber 3 through the water replenishing pipes 7 to reduce the overall temperature of the coolant. A plurality of water exchange pipes 8 are installed on the water outlet chamber 2. A plurality of water exchange branch pipes 801 are fixedly connected to the water exchange pipes 8. The water exchange branch pipes 801 are connected to the water replenishing chamber 3, and a second micro solenoid valve 802 is installed on the water exchange branch pipes 801 to control the opening and closing of the water exchange branch pipes 801. The coolant with a higher temperature in the water replenishing chamber 3 can flow into the water outlet chamber 2 through the water exchange branch pipes 801; thereby reducing the temperature of the coolant in the water replenishing chamber 3.

[0035] Among them, a mutually independent first water chamber 304 and a second water chamber 305 are respectively arranged in the water replenishing chamber 3 in the left-right direction; among them, the water replenishing branch pipe 701 is connected to the second water chamber 305, the water changing branch pipe 801 is connected to the first water chamber 304, the coolant flows into the first water chamber 304 after heat exchange through the cooling plate 5, the coolant after heat exchange in the first water chamber 304 flows into the water outlet chamber 2 through the water changing pipe 8, and the coolant in the water inlet chamber 1 can be supplemented into the second water chamber 305 through the water replenishing pipe 7. In this embodiment, by providing the mutually independent first water chamber 304 and the second water chamber 305 in the water replenishing chamber 3, the coolant with a higher temperature and the coolant with a lower temperature can be separated; among them, a valve hole 307 is provided between the first water chamber 304 and the second water chamber 305, the valve hole 307 is arranged at a position in the middle and close to the lower part, a valve plate 306 is rotatably connected in the valve hole 307, when the valve plate 306 rotates to the vertical state, the valve hole 307 is closed; when the valve plate 306 rotates to the inclined state, the valve hole 307 is opened, and the coolant in the first water chamber 304 and the second water chamber 305 can be mixed, and a micro motor 303 for driving the valve plate 306 to rotate is installed outside the water replenishing chamber 3; the rotation of the valve plate 306 is controlled by the micro motor 303, and then the opening state of the valve hole 307 is controlled.

[0036] During specific implementation: In this embodiment, by controlling the opening states of the first micro solenoid valve 702, the second micro solenoid valve 802, and the valve orifice 307, the heat dissipation effect of the battery module can be divided into two levels. Among them, the first heat dissipation level is: opening the first micro solenoid valve 702 and the valve orifice 307, and closing the second micro solenoid valve 802. At this time, during the process of cooling the battery module 6, the coolant in the water inlet chamber 1 flows into the first water chamber 304 in the water replenishing chamber 3 after heat exchange through the cooling plate 5. At the same time, the water inlet chamber 1 continuously replenishes the cooler coolant into the second water chamber 305 in each water replenishing chamber 3 through the water replenishing pipe 7. The coolant with a higher temperature in the first water chamber 304 and the coolant with a lower temperature in the second water chamber 305 are mixed, so that the overall temperature of the coolant is between the two temperatures. Then, it flows through the cooling plate 5 into the next water replenishing chamber 3 and is mixed with the replenished cooler coolant again, so that the temperature of the coolant does not become too high during the heat exchange process. Compared with Embodiment 1, the cooling effect on the battery module 6 in this level is improved, and the heat dissipation effect is better. The second heat dissipation level is: opening the first micro solenoid valve 702 and the second micro solenoid valve 802, and closing the valve orifice 307. At this time, during the process of cooling the battery module 6, the coolant flows into the first water chamber 304 in the water replenishing chamber 3 after heat exchange through the cooling plate 5, and then directly flows into the water outlet chamber 2 through the water exchange pipe 8. At the same time, the water inlet chamber 1 continuously replenishes the cooler coolant into the second water chamber 305 in each water replenishing chamber 3 through the water replenishing pipe 7. The coolant flows into the first water chamber 304 in the next water replenishing chamber 3 after heat exchange through the cooling plate 5 and then also directly flows into the water outlet chamber 2 through the water exchange pipe 8. Thus, the coolant with a higher temperature in each water replenishing chamber 3 directly flows out, while the replenished cooler coolant remains for heat exchange, and the coolant with a higher temperature and the coolant with a lower temperature are no longer mixed. Compared with Embodiment 1, the cooling effect on the battery module 6 in this level is greatly improved, the cooling effect is excellent, and the heat dissipation effect on each battery module 6 is more uniform, and the heat dissipation effect is better than that of the first heat dissipation level. In this embodiment, different levels of heat dissipation modes have different requirements for the flow rate of the coolant and the output power of the water pump. During specific implementation, the corresponding level mode can be selected according to the actual temperature of the battery module 6, the actual output power, and the external environmental temperature.

[0037] Finally, it should be noted that: In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cooling plate assembly for liquid cooling of a power battery, characterized in that, Including: An inlet chamber (1), an outlet chamber (2), a battery module (6), and a plurality of water replenishing chambers (3) located between the inlet chamber (1) and the outlet chamber (2); Among them, the battery module (6) is arranged between the inlet chamber (1) and the water replenishing chamber (3), between adjacent water replenishing chambers (3), and between the water replenishing chamber (3) and the outlet chamber (2); An inlet port (101) is provided on the inlet chamber (1), an outlet port (201) is provided on the outlet chamber (2), and multiple groups of hollow-structured cooling plates (5) are installed between the water replenishing chamber (3) and the inlet chamber (1) and the outlet chamber (2). The cooling plates (5) are used to absorb the heat of the battery module (6); And a battery slot is formed between each adjacent group of cooling plates (5), and the battery module (6) is installed in the battery slot.

2. The cooling plate assembly for liquid cooling of a power battery according to claim 1, wherein A plurality of water replenishing pipes (7) are installed on the inlet chamber (1), a plurality of water replenishing branch pipes (701) are fixedly connected to the water replenishing pipes (7), the water replenishing branch pipes (701) are connected to the water replenishing chamber (3), and a first micro solenoid valve (702) is installed on the water replenishing branch pipes (701) for controlling the switch of the water replenishing branch pipes (701).

3. The cooling plate assembly for liquid cooling of a power battery according to claim 2, wherein, A plurality of water exchange pipes (8) are installed on the outlet chamber (2), a plurality of water exchange branch pipes (801) are fixedly connected to the water exchange pipes (8), the water exchange branch pipes (801) are connected to the water replenishing chamber (3), and a second micro solenoid valve (802) is installed on the water exchange branch pipes (801) for controlling the switch of the water exchange branch pipes (801).

4. The cooling plate assembly for liquid cooling of a power battery according to claim 3, characterized in that, A mutually independent first water chamber (304) and a second water chamber (305) are respectively arranged in the left-right direction in the water replenishing chamber (3); among them, the water replenishing branch pipe (701) is connected to the second water chamber (305), and the water exchange branch pipe (801) is connected to the first water chamber (304); a valve hole (307) is provided between the first water chamber (304) and the second water chamber (305), a valve plate (306) is rotatably connected in the valve hole (307) for sealing the valve hole (307), and a micro motor (303) for driving the valve plate (306) to rotate is installed outside the water replenishing chamber (3).

5. A cooling plate assembly for liquid cooling of a power battery according to claim 4, characterized in that, A side cover (104) is hermetically and fixedly installed on one side surface of the inlet chamber (1), a plurality of first through holes (102) corresponding to the cooling plates (5) one by one are provided on the surface of the side cover (104), and longitudinal staggered ribs (103) are provided on the inner wall of the inlet chamber (1); among them, the structure of the outlet chamber (2) is the same as that of the inlet chamber (1).

6. The cooling plate assembly for liquid cooling of a power battery according to claim 5, wherein, A pair of end covers (301) are hermetically and fixedly installed at both ends of the water replenishing chamber (3), and a plurality of second through holes (302) corresponding to the cooling plates (5) one by one are provided on both surfaces of the water replenishing chamber (3).

7. The cooling plate assembly for liquid cooling of a power battery according to claim 6, wherein, A heat conducting pad (4) is installed on each group of the cooling plates (5). The heat conducting pad (4) includes two fixedly connected heat conducting plates (401), and a receiving groove (402) for cooperating with the cooling plate (5) is provided between the two heat conducting plates (401). The inner and outer surfaces of the heat conducting plate (401) are respectively in contact with the surface of the cooling plate (5) and the surface of the battery module (6).

8. A cooling plate assembly for liquid cooling of a power battery according to claim 7, characterized in that, The inner and outer surfaces of the heat conduction plate (401) are respectively provided with a first heat dissipation groove (404) and a second heat dissipation channel (405), and a heat dissipation opening (403) is provided at the top of the accommodation groove (402).

9. A cooling plate assembly for liquid cooling of a power battery according to claim 8, characterized in that, A plurality of layered partition plates (501) are arranged inside the cooling plate (5), and a plurality of heat dissipation teeth (502) are evenly distributed on the inner wall of the cooling plate (5).

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