A cooling plate assembly for power battery liquid cooling

Abstract

The present invention belongs to the technical field of battery heat dissipation, and in particular to a cooling plate assembly for cooling power battery liquid; the present invention comprises: a water inlet chamber, a water outlet chamber, a battery module and a plurality of water replenishing chambers located between the water inlet chamber and the water outlet chamber; wherein the battery module is arranged between the water inlet chamber and the water replenishing chamber, between adjacent water replenishing chambers, and between the water replenishing chamber and the water outlet chamber; a water inlet is provided on the water inlet chamber, a water outlet is provided on the water outlet chamber, and a plurality of groups of hollow cooling plates are installed between the water replenishing chamber and the water inlet chamber and the water outlet chamber, and the cooling plates are used to absorb the heat of the battery module; and a battery slot is formed between each adjacent group of cooling plates, and the battery module is installed in the battery slot; the present invention can separate adjacent battery modules by providing a plurality of cooling plates between each group of battery modules, and the coolant takes away the heat of the battery module when flowing through the cooling plates, thereby solving the problem that heat accumulation cannot be dissipated due to mutual contact between battery modules.

Description

Technical Field

[0001] The present invention relates to the technical field of battery heat dissipation, and in particular to a cooling plate assembly for cooling power battery liquid. 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 achieve optimal battery performance and life, it is necessary to introduce a thermal management system to perform low-temperature heating, high-temperature heat dissipation and thermal insulation management on the battery to limit the temperature rise and temperature difference of the battery, achieve temperature uniformity of the battery pack, ensure that the battery operates within the appropriate temperature range, reduce battery performance degradation, and eliminate other potential safety risks.

[0003] The power battery liquid cooling plate assemblies currently on the market all place the liquid cooling plate at the bottom of the battery pack, which has a general cooling effect on the battery. It is unable to make the power battery more evenly heated or heat-dissipated, so that the heat at the bottom of the power battery is effectively removed, while the heat in the middle and top of the battery is slowly dissipated; thus affecting the power battery's storage and discharge capabilities. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a cooling plate assembly for power battery liquid cooling. By providing a cooling plate between the battery modules, the middle part of the battery is cooled and dissipated, aiming to solve the problems in the background technology.

[0005] In order to achieve the above technical objectives, the specific technical scheme of the present invention is as follows: the present invention proposes a cooling plate assembly for power battery liquid cooling, comprising: a water inlet chamber, a water outlet chamber, a battery module and a plurality of water replenishment chambers located between the water inlet chamber and the water outlet chamber; wherein, the battery module is arranged between the water inlet chamber and the water replenishment chamber, between adjacent water replenishment chambers, and between the water replenishment chamber and the water outlet chamber; the water inlet chamber is provided with a water inlet, and the water outlet chamber is provided with a water outlet, and multiple groups of hollow cooling plates are installed between the water replenishment chamber and the water inlet chamber and the water outlet chamber, and the cooling plates are used to absorb the heat of the battery module; and a battery slot is formed between each adjacent group of cooling plates, and the battery module is installed in the battery slot.

[0006] As an optimal technical solution of the present invention, multiple water supply pipes are installed on the water inlet chamber, multiple water supply branches are fixedly connected to the water supply pipes, the water supply branches are connected to the water supply chamber, and a first micro solenoid valve is installed on the water supply branch for controlling the switch of the water supply branch.

[0007] As an optimal technical solution of the present invention, multiple water exchange pipes are installed on the water outlet chamber, multiple water exchange branches are fixedly connected to the water exchange pipes, the water exchange branches are connected to the water replenishment chamber, and a second micro solenoid valve is installed on the water exchange branch for controlling the switch of the water exchange branch.

[0008] As a preferred technical solution of the present invention, a first water chamber and a second water chamber independent of each other are respectively provided in the left and right directions of the water replenishment chamber; wherein, the water replenishment branch pipe is connected to the second water chamber, and the water change branch pipe is connected to the first water chamber; a valve hole is provided 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 replenishment chamber.

[0009] As a preferred technical solution of the present invention, a side cover is sealed and fixedly installed on one side of the water inlet chamber, and the surface of the side cover is provided with a plurality of first through holes connected one-to-one with the cooling plates, and the inner wall of the water inlet chamber is provided with longitudinally staggered ribs; 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 sealed and fixedly installed at both ends of the water replenishing chamber, and a plurality of second through holes are provided on both sides of the water replenishing chamber, which are connected to the cooling plates in a one-to-one correspondence;

[0011] As a preferred technical solution of the present invention, a thermal pad is installed on each group of cooling plates, and the thermal pad includes two fixedly connected thermal pads, and a receiving groove connected to the cooling plate is provided between the two thermal plates, and the inner and outer surfaces of the thermal plate are in contact with the cooling plate and the battery module surface respectively.

[0012] As a preferred technical solution of the present invention, the inner and outer surfaces of the heat conducting plate are respectively provided with a first heat dissipation groove and a second heat dissipation groove, and the top of the receiving groove is provided with a heat dissipation opening.

[0013] As a preferred technical solution of the present invention, a plurality of layered partitions are provided inside the cooling plate, and a plurality of heat dissipation teeth are evenly distributed on the inner wall of the cooling plate.

[0014] The beneficial effects of the present invention are:

[0015] 1. The present invention is equipped with a water inlet chamber, a water outlet chamber and multiple water replenishment chambers, and multiple cooling plates are provided between each group of battery modules, which can separate adjacent battery modules. When the coolant flows through the cooling plates, the heat of the battery modules is taken away, solving the problem of heat accumulation and inability to dissipate due to contact between battery modules.

[0016] 2. The present invention connects a water supply pipe between the water inlet chamber and the water supply chamber, and connects a water exchange pipe between the water outlet chamber and the water supply chamber. Coolant with a lower temperature is continuously supplied into the middle water supply chamber through the water inlet chamber, so that the temperature of the coolant will not be too high during the heat exchange process, thereby improving the cooling effect of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a front view schematic diagram of the present invention.

[0019] Figure 3 It is an explosion diagram of the present invention.

[0020] Figure 4 It is a schematic diagram of the water inlet chamber, water replenishment chamber and water outlet chamber of the present invention.

[0021] Figure 5 for Figure 4 Schematic diagram from another angle.

[0022] Figure 6 This is a schematic structural diagram of the water replenishment chamber proposed in the present invention.

[0023] Figure 7 This is a cross-sectional schematic diagram of the water replenishing device proposed by the present invention.

[0024] Figure 8 This is a structural schematic diagram of the water inlet chamber proposed in the present invention.

[0025] Figure 9 This is a schematic cross-sectional view of the water inlet chamber proposed by the present invention.

[0026] Figure 10 This is a schematic structural diagram of the thermal pad proposed in the present invention.

[0027] Figure 11 This is a schematic structural diagram of the cooling plate proposed in the present invention.

[0028] The corresponding names of the figure marks 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 supply 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. Thermal pad; 401. Thermal plate; 402. Receiving groove; 403. Heat dissipation opening; 404. First heat dissipation groove; 405. Second heat dissipation groove; 5. Cooling plate; 501. Partition; 502. Heat dissipation tooth; 6. Battery module; 7. Water supply pipe; 701. Water supply branch pipe; 702. First micro solenoid valve; 8. Water exchange pipe; 801. Water exchange branch pipe; 802. Second micro solenoid valve. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Example 1: Figures 1-11 As shown, this embodiment discloses a cooling plate assembly for power battery liquid cooling, comprising: a water inlet chamber 1, a water outlet chamber 2, a battery module 6, and a plurality of water replenishing chambers 3 located between the water inlet chamber 1 and the water outlet chamber 2. In this embodiment, three water replenishing chambers 3 are provided; wherein, the battery module 6 is provided between the water inlet chamber 1 and the water replenishing chamber 3, between adjacent water replenishing chambers 3, and between the water replenishing chamber 3 and the water outlet chamber 2; a water inlet 101 is provided on the water inlet chamber 1, and a water outlet 201 is provided on the water outlet chamber 2. Both the water inlet 101 and the water outlet 201 are connected to a water pipe of an external cooling system, and a water pump can be installed on the water pipe to provide power for the flow of coolant; multiple groups of cooling plates 5 with hollow structures are installed between the water replenishing chamber 3 and the water inlet chamber 1 and the water outlet chamber 2, and each group of cooling plates 5 There are three cooling plates 5, namely upper, middle and lower cooling plates 5, which are in contact with the upper, middle and lower parts of the battery module 6 respectively; 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; the coolant enters the water inlet chamber 1 through the water inlet 101, and then flows into the water replenishment chamber 3 through the cooling plate 5, and finally flows into the water outlet chamber 2, and flows out through the water outlet 201. When the coolant flows through the cooling plate 5, it drives the heat on the surface of the battery module 6 to cool the battery module; in this embodiment, by providing a cooling plate 5 on the side of the battery module 6, the cooling plate 5 can separate the adjacent battery modules 6 and take away the heat from the surface of the battery module 6, so that the cooling effect is good, which solves the problem that the heat of the battery modules 6 cannot be dissipated due to contact with each other.

[0031] like Figure 6 As shown, a pair of end covers 301 are sealed and fixedly installed at both ends of the water replenishment chamber 3, and a number of second through holes 302 are provided on both sides of the water replenishment chamber 3, which are connected one-to-one with the cooling plates 5, wherein the cooling plates 5 are fixedly connected to the second through holes 302 by welding.

[0032] like Figure 8 As shown, a side cover 104 is sealed and fixedly installed on one side of the water inlet chamber 1. The surface of the side cover 104 is provided with a plurality of first through holes 102 which are connected one-to-one with the cooling plates 5. The cooling plates 5 are fixedly connected to the first through holes 102 by welding, and the inner wall of the water inlet chamber 1 is provided with longitudinally staggered ribs 103, which increase the structural strength of the water inlet chamber 1; wherein, the structure of the water outlet chamber 2 is the same as that of the water inlet chamber 1.

[0033] like Figure 10As shown, in order to improve the heat exchange effect between the battery module 6 and the cooling plate 5, a thermal pad 4 is installed on each group of cooling plates 5. The thermal pad 4 includes two fixedly connected heat conducting plates 401. The upper ends of the two heat conducting plates 401 are fixedly connected, and a receiving groove 402 is provided between the two heat conducting plates 401 to cooperate with the cooling plate 5. 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 in contact with the cooling plate 5 and the surface of the battery module 6 respectively. The heat of the battery module 6 is transferred to the cooling plate 5 through the heat conducting plate 401; A first heat dissipation groove 404 and a second heat dissipation groove 405 are respectively provided on the inner and outer surfaces. The first heat dissipation groove 404 and the second heat dissipation groove 405 are staggered with each other, and a heat dissipation opening 403 is provided on the top of the accommodating groove 402. Through the design of the first heat dissipation groove 404 and the second heat dissipation groove 405, a heat dissipation airflow channel is formed between the thermal pad 4 and the battery module 6 and the cooling plate 5; the air flow can flow between the battery modules 6, and 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 groove 405, and finally dissipated from the heat dissipation opening 403.

[0034] like Figure 11 As shown, a plurality of layered partitions 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, which increases the contact area between the cooling plate 5 and the coolant and improves the heat exchange efficiency.

[0035] Example 2: Based on the structure of the above-mentioned embodiment 1, since the coolant continuously absorbs heat during the flow in the cooling plate 5, the coolant temperature gradually increases after passing through the 1-2 water replenishment chamber, resulting in a good cooling effect on the battery module 6 close to the water inlet chamber 1, while the cooling effect on the battery module 6 close to the water outlet chamber 2 is low, and the battery module 6 is cooled unevenly. To solve this problem, this embodiment is as follows. Figure 4-Figure 5 as well as Figure 7 As shown, a plurality of water supply pipes 7 are installed on the water inlet chamber 1, and a plurality of water supply branches 701 are fixedly connected to the water supply pipe 7. The water supply branch 701 is connected to the water supply chamber 3, and a first micro solenoid valve 702 is installed on the water supply branch 701 for controlling the switch of the water supply branch 701. The water inlet chamber 1 can replenish the coolant with lower temperature into the water supply chamber 3 through the water supply pipe 7 to reduce the overall temperature of the coolant; a plurality of water exchange pipes 8 are installed on the water outlet chamber 2, and a plurality of water exchange branches 801 are fixedly connected to the water exchange pipe 8. The water exchange branch 801 is connected to the water supply chamber 3, and a second micro solenoid valve 802 is installed on the water exchange branch 801 for controlling the switch of the water exchange branch 801. The coolant with higher temperature in the water supply chamber 3 can flow into the water outlet chamber 2 through the water exchange branch 801, thereby reducing the temperature of the coolant in the water supply chamber 3.

[0036] Among them, the water replenishment chamber 3 is provided with a first water chamber 304 and a second water chamber 305 which are independent of each other in the left and right directions; wherein, the water replenishment 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. 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 exchange pipe 8. The coolant in the water inlet chamber 1 can be replenished to the second water chamber 305 through the water replenishment pipe 7. In this embodiment, by providing the first water chamber 304 and the second water chamber 305 which are independent of each other in the water replenishment chamber 3, the coolant with higher temperature and the coolant with lower temperature can be cooled. The lower coolant is separated; wherein, a valve hole 307 is provided between the first water chamber 304 and the second water chamber 305, and the valve hole 307 is provided at a lower position in the middle. A valve plate 306 is rotatably connected in the valve hole 307, and when the valve plate 306 is rotated to a vertical state, the valve hole 307 is closed; when the valve plate 306 is rotated to an inclined state, the valve hole 307 is opened, and the coolants in the first water chamber 304 and the second water chamber 305 can be mixed, and a micro motor 303 is installed outside the water replenishment chamber 3 to drive the valve plate 306 to rotate; the rotation of the valve plate 306 is controlled by the micro motor 303, thereby controlling the opening state of the valve hole 307.

[0037] In specific implementation: This embodiment controls the opening states of the first micro-solenoid valve 702, the second micro-solenoid valve 802 and the valve hole 307, and the heat dissipation effect on the battery module can be divided into two levels. Among them, the first heat dissipation level is: the first micro-solenoid valve 702 and the valve hole 307 are opened, and the second micro-solenoid valve 802 is closed. At this time, in 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 flows to the second water chamber 305 in each water replenishing chamber 3 through the water replenishing pipe 7. The coolant with lower temperature is continuously replenished in the water chamber 304, and the coolant with higher temperature in the first water chamber 304 and the coolant with lower temperature in the second water chamber 305 are mixed, so that the overall temperature of the coolant is between the two temperatures, and then flows into the next water replenishment chamber 3 through the cooling plate 5, and is mixed with the replenished coolant with lower temperature again, so that the temperature of the coolant is not too high during the heat exchange process. Compared with the first embodiment, this level has an improved cooling effect on the battery module 6 and a better heat dissipation effect; the second heat dissipation level is: the first micro solenoid valve 702 and the second micro solenoid valve 802 are opened, and the valve The hole 307 is closed. At this time, in 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 flows directly into the water outlet chamber 2 through the water exchange pipe 8. At the same time, the water inlet chamber 1 continuously replenishes the coolant with lower temperature to 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 through the cooling plate 5 for heat exchange, and then flows directly into the water outlet chamber 2 through the water exchange pipe 8, so that the coolant with higher temperature in each water replenishing chamber 3 flows directly. The coolant with a lower temperature is discharged, and the supplementary coolant with a lower temperature is left for heat exchange, and the coolant with a higher temperature is no longer mixed with the coolant with a lower temperature. Compared with the first embodiment, this level has a greatly improved cooling effect on the battery module 6, an excellent cooling effect, and a more uniform heat dissipation effect on each battery module 6, which is better than the first heat dissipation level. Different levels of heat dissipation modes in this embodiment have different requirements on the flow rate of the coolant and the output power of the water pump. In 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 ambient temperature.

[0038] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A cooling plate assembly for power battery liquid cooling, characterized in that: include: A water inlet chamber (1), a water outlet chamber (2), a battery module (6), and a plurality of water replenishment chambers (3) located between the water inlet chamber (1) and the water outlet chamber (2); The battery module (6) is arranged between the water inlet chamber (1) and the water replenishment chamber (3), between adjacent water replenishment chambers (3), and between the water replenishment chamber (3) and the water outlet chamber (2); The water inlet chamber (1) is provided with a water inlet (101), the water outlet chamber (2) is provided with a water outlet (201), and multiple sets of hollow cooling plates (5) are installed between the water replenishment chamber (3) and the water inlet chamber (1) and the water outlet chamber (2). The cooling plates (5) are used to absorb heat from the battery module (6); A battery slot is formed between each adjacent set of cooling plates (5), and the battery module (6) is installed in the battery slot; The water inlet chamber (1) is provided with a plurality of water supply pipes (7), the water supply pipes (7) are fixedly connected to a plurality of water supply branches (701), the water supply branches (701) are connected to the water supply chamber (3), and a first micro electromagnetic valve (702) is provided on the water supply branch pipe (701) for controlling the opening and closing of the water supply branch pipe (701); The water outlet chamber (2) is provided with a plurality of water exchange pipes (8), the water exchange pipes (8) are fixedly connected to a plurality of water exchange branch pipes (801), the water exchange branch pipes (801) are connected to the water replenishment chamber (3), and a second micro electromagnetic valve (802) is provided on the water exchange branch pipe (801) for controlling the opening and closing of the water exchange branch pipe (801); A first water chamber (304) and a second water chamber (305) are provided in the water replenishment chamber (3) in the left and right directions, respectively, and are independent of each other; wherein the water replenishment 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 to the valve hole (307) for sealing the valve hole (307); and a micro motor (303) is installed outside the water replenishment chamber (3) for driving the valve plate (306) to rotate.

2. A cooling plate assembly for power battery liquid cooling according to claim 1, characterized in that: A side cover (104) is sealed and fixedly mounted on one side of the water inlet chamber (1); a surface of the side cover (104) is provided with a plurality of first through holes (102) connected one-to-one with the cooling plates (5); and the inner wall of the water inlet chamber (1) is provided with longitudinally staggered ribs (103); wherein the structure of the water outlet chamber (2) is the same as that of the water inlet chamber (1).

3. A cooling plate assembly for power battery liquid cooling according to claim 2, characterized in that: A pair of end covers (301) are sealed and fixedly installed at both ends of the water replenishing chamber (3), and a plurality of second through holes (302) connected to the cooling plates (5) in a one-to-one correspondence are provided on both sides of the water replenishing chamber (3).

4. A cooling plate assembly for power battery liquid cooling according to claim 3, characterized in that: A thermal pad (4) is installed on each group of cooling plates (5), and the thermal pad (4) includes two fixedly connected thermal pads (401), and a receiving groove (402) is provided between the two thermal plates (401) and is connected to the cooling plate (5). The inner and outer surfaces of the thermal plate (401) are in contact with the cooling plate (5) and the surface of the battery module (6) respectively.

5. A cooling plate assembly for power battery liquid cooling according to claim 4, characterized in that: 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), and the top of the receiving groove (402) is provided with a heat dissipation opening (403).

6. A cooling plate assembly for power battery liquid cooling according to claim 5, characterized in that: A plurality of layered partitions (501) are provided 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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