Liquid cooling structure and energy storage equipment

Abstract

The liquid cooling structure comprises a liquid cooling plate, a water inlet pipe group and a water outlet pipe group, the liquid cooling plate comprises a liquid cooling plate main body and a snakelike liquid cooling cavity, the liquid cooling cavity is fixedly arranged on the liquid cooling plate main body, the liquid cooling cavity comprises a plurality of flow guide heat exchange parts, and the flow guide heat exchange parts are of hollow strip plate-shaped structures; one ends of every two adjacent flow guide heat exchange parts are communicated through a connecting part, the inner side wall of each connecting part is arc-shaped, the outer side wall of each connecting part is a smooth straight line, the flow guide heat exchange parts of a hollow strip plate-shaped structure are adopted, the heat exchange contact area is enlarged, the heat exchange efficiency is improved, the arrangement of the connecting parts is matched, the liquid cooling cavity can cover each battery cell, and the heat exchange efficiency is improved. Meanwhile, the flowing path and the flowing pressure of the cooling liquid are better controlled, it is guaranteed that the liquid pressure difference at each position is small, and the cooling liquid flow fields in the flow guide heat exchange parts at all positions of the liquid cooling plate can be evenly distributed, so that it is guaranteed that the battery is evenly cooled, the cooling effect is improved, and the influence on the service life of the battery is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage liquid cooling and heat dissipation, in particular to a liquid cooling structure and energy storage equipment. Background Art

[0002] In order to improve energy storage capacity, energy storage devices are generally equipped with multiple columns of battery modules, and each column of battery modules is provided with multiple layers of batteries for energy storage. As the energy density and charge and discharge rate of the batteries in the energy storage device increase, a large amount of heat will be rapidly generated inside the battery during the operation of the energy storage device, which requires heat dissipation and cooling to maintain the normal operating temperature of the battery of the energy storage device.

[0003] Among existing energy storage devices, the liquid cooling structure (such as publication number CN118137010A) has the best heat dissipation and cooling effect and is more commonly used. Each layer of batteries is equipped with a liquid cooling plate at the bottom. Each liquid cooling plate is connected to the liquid cooling unit through a liquid inlet pipe and a liquid outlet pipe. Under the action of the liquid cooling unit, the coolant is transported to the corresponding liquid cooling plate. The coolant flows through the liquid cooling plate and then uses the coolant to remove heat to achieve cooling and heat dissipation of the corresponding battery.

[0004] The existing liquid cooling structure has several long and slender tubular guide channels inside the liquid cooling plate to guide the coolant. The long and slender guide channels reduce the contact area between the coolant and the battery, making it unable to fully contact and absorb the heat generated by the battery, reducing the cooling efficiency, and restricting the flow of the coolant, resulting in uneven distribution of the coolant flow field. There is a large liquid pressure difference at different positions of the liquid cooling plate, which leads to uneven cooling of the battery and seriously affects the battery life. Utility Model Content

[0005] In order to solve the technical problems in the above-mentioned background technology that the liquid cooling plate of the existing liquid cooling structure guides the coolant through a slender guide channel, which affects the heat exchange efficiency and easily causes uneven cooling, the present utility model provides a liquid cooling structure and energy storage device.

[0006] The technical solution of this utility model is as follows:

[0007] The utility model provides a liquid cooling structure, including a liquid cooling plate group, a water inlet pipe group and a water outlet pipe group connected to the liquid cooling plate group, the liquid cooling plate group is composed of a liquid cooling plate, the liquid cooling plate includes a liquid cooling plate body and a serpentine liquid cooling cavity, the liquid cooling cavity is fixedly arranged on the liquid cooling plate body, the liquid cooling cavity includes a plurality of guide heat exchange parts, the guide heat exchange parts are hollow long plate-shaped structures, the plurality of guide heat exchange parts are sequentially spaced and parallel to each other along the width direction of the liquid cooling plate body, one end of two adjacent guide heat exchange parts is connected by a connecting part, the adjacent connecting parts are staggered, the inner side wall of the connecting part is arc-shaped, and the outer side wall of the connecting part is arc-shaped. The side walls are smooth straight lines, and the setting of the hollow long plate-shaped guide and heat exchange part expands the heat exchange contact area and improves the heat exchange efficiency. The setting of the guide and heat exchange part in conjunction with the connection part is conducive to allowing the liquid cooling cavity to cover each battery cell, taking away the heat of each battery cell while better controlling the flow path and flow pressure of the coolant, ensuring that the liquid pressure difference at each location is small, and enabling the coolant flow field in the guide and heat exchange part at each position of the liquid cooling plate to be evenly distributed, so as to ensure uniform cooling of the battery, improve the cooling effect, reduce the impact on battery life, and at the same time reduce the use of materials.

[0008] Preferably, the width of the flow-guiding and heat-exchanging portion is greater than the spacing between adjacent flow-guiding and heat-exchanging portions to ensure sufficient heat exchange area.

[0009] Preferably, at least one liquid cooling plate group is provided, and the liquid cooling plate group includes at least two liquid cooling plates spaced apart in the up and down directions. The water inlet of the liquid cooling plate is connected to the water inlet pipe group, and the water outlet of the liquid cooling plate is connected to the water outlet pipe group. The liquid cooling plate is conveniently connected to the liquid cooling unit through the water inlet pipe group and the water outlet pipe group to realize the circulation of the coolant.

[0010] Preferably, the water inlet pipe group includes a water inlet main pipe and a water inlet branch pipe. The water inlet main pipe contains a first vertical section. Several water inlet branches are fixedly arranged on the first vertical section at vertical intervals. The water inlet branch pipes are connected to the water inlet of the adjacent liquid cooling plate to facilitate the delivery of cooling liquid to liquid cooling plates at different positions.

[0011] Preferably, the water outlet pipe group includes a water outlet main pipe and a water outlet branch pipe. The water outlet main pipe contains a second vertical section. Several water outlet branch pipes are fixedly arranged on the second vertical section at vertical intervals. The water outlet branch pipes are connected to the water outlet of the adjacent liquid cooling plate to facilitate the discharge and diversion of the coolant from the liquid cooling plates at different positions.

[0012] Preferably, the number of first vertical sections and second vertical sections is the same as the number of liquid cooling plate groups, and the number of water inlet branches and water outlet branches is the same as the number of liquid cooling plates, so as to synchronously connect several liquid cooling plates and achieve synchronous cooling of multiple liquid cooling plates.

[0013] Preferably, the water inlet branch and the water outlet branch connected to the same liquid cooling plate have a water inlet end height of the water inlet branch and a water outlet end height of the water outlet branch that are higher than the corresponding liquid cooling plate, and the water inlet end height of the water inlet branch is higher than the water outlet end height of the water outlet branch, so as to assist the flow of the cooling liquid through gravity, thereby reducing the demand for pumping power and thus reducing the energy consumption of the system.

[0014] Preferably, the water inlet branch pipe contains multiple first bends, and the water outlet branch pipe contains multiple second bends, the number of second bends is less than the first bends, and the bending radius of the second bends is greater than the first bends, so that the water outlet speed of the liquid cooling plate is slightly greater than the water inlet speed, so as to improve the cooling efficiency, reduce scaling and corrosion, and reduce energy consumption.

[0015] The utility model also provides an energy storage device which adopts a liquid cooling structure.

[0016] It can be seen from the above technical solutions that the advantages of the present invention are:

[0017] 1. The hollow long plate structure of the heat transfer part expands the heat exchange contact area and improves the heat exchange efficiency. Combined with the use of the connection part, it is conducive to allowing the liquid cooling cavity to cover each battery cell, taking away the heat of each battery cell while better controlling the flow path and flow pressure of the coolant, ensuring that the pressure difference of the liquid at each location is small, and can make the coolant flow field in the heat transfer part of each position of the liquid cooling plate evenly distributed, so as to ensure uniform cooling of the battery, improve the cooling effect, reduce the impact on battery life, and at the same time reduce the use of materials.

[0018] 2. The inner side wall of the connecting part is arc-shaped, which can optimize the fluid path, guide the coolant to pass through the bend more smoothly, reduce the fluid resistance caused by sharp turns, help maintain the speed and stability of the coolant, avoid the formation of vortexes or backflows at the bends, thereby reducing energy loss, and can also effectively reduce the pressure drop of the coolant at the bends, ensuring that the coolant can flow smoothly to the next diversion and heat exchange part. In addition, it also helps to optimize the fluid distribution of the coolant at the bends, ensuring that the coolant can evenly cover the entire cooling area, which helps to improve cooling efficiency and reduce the possibility of heat accumulation and hot spot formation; the outer side wall of the connecting part is a smooth straight line, which can reduce the friction between the coolant and the side wall, reduce fluid resistance, and improve diversion efficiency.

[0019] 3. The height of the water inlet end of the water inlet branch is higher than the height of the water outlet end of the water outlet branch, so that gravity assists the flow of coolant, thereby reducing the demand for pumping power and thus reducing the energy consumption of the system; the number of second bends is less than the first bends, and the curvature of the second bends is greater than that of the first bends, so that the water outlet speed of the liquid cooling plate is slightly greater than the water inlet speed, thereby improving cooling efficiency, reducing scaling and corrosion, and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic structural diagram of a liquid cooling plate according to one or more embodiments of the present invention;

[0022] Figure 2 This is a schematic diagram of the shape of the water inlet pipe group and the water outlet pipe group according to one or more embodiments of the present invention;

[0023] Figure 3 This is a schematic diagram of temperature distribution of a liquid cooling plate according to one or more embodiments of the present invention;

[0024] The components represented by the reference numerals in the figure are:

[0025] 1. Liquid cooling plate; 2. Water inlet main pipe; 3. Water inlet branch pipe; 4. Water outlet main pipe; 5. Water outlet branch pipe; 6. Liquid cooling plate body; 7. Heat transfer unit; 8. Connecting unit; 9. Water inlet; 10. Water outlet. DETAILED DESCRIPTION

[0026] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0027] Example 1

[0028] In a typical embodiment of the present invention, Figure 1-Figure 3 As shown, a liquid cooling structure is proposed, including: a liquid cooling plate group, a water inlet pipe group and a water outlet pipe group. At least one liquid cooling plate group is provided. When multiple liquid cooling plate groups are provided, the multiple liquid cooling plate groups are arranged side by side. The liquid cooling plate group includes at least two liquid cooling plates 1 spaced apart in the up and down directions. The water inlet 9 of the liquid cooling plate 1 is connected to the water inlet pipe group, and the water outlet 10 of the liquid cooling plate 1 is connected to the water outlet pipe group. The battery module is installed on the liquid cooling plate 1 to exchange heat with the battery module through the liquid cooling plate 1, thereby realizing temperature control of the battery module.

[0029] like Figure 1As shown, the liquid cooling plate 1 includes a liquid cooling plate body 6 and a liquid cooling cavity. The liquid cooling cavity is a serpentine structure and is fixedly arranged on the liquid cooling plate body 6. The liquid cooling cavity includes a plurality of guide and heat exchange parts 7 and a plurality of connecting parts 8. The guide and heat exchange part 7 is a hollow long plate structure. The guide and heat exchange part 7 contains a chamber for guiding the cooling liquid. A plurality of fin structures are fixedly provided on the outer wall of the guide and heat exchange part 7 to improve the heat exchange capacity.

[0030] Specifically, a single heat-conducting and exchanging portion 7 extends along the length direction of the liquid-cooling plate body 6, and several heat-conducting and exchanging portions 7 are arranged in sequence along the width direction of the liquid-cooling plate body 6, and all the heat-conducting and exchanging portions 7 are parallel to each other. The width of the heat-conducting and exchanging portion 7 is much larger than the spacing between adjacent heat-conducting and exchanging portions 7. The number of heat-conducting and exchanging portions 7 is 3-6, preferably 4.

[0031] One end of two adjacent heat-conducting parts 7 is connected through a connecting part 8, and the adjacent connecting parts 8 are staggered, that is, one end of the heat-conducting part 7 is connected to one end of a heat-conducting part 7 on one side of it through a connecting part 8, and the other end of the heat-conducting part 7 is connected to one end of a heat-conducting part 7 on the other side of it through a connecting part 8, thereby forming a serpentine liquid cooling cavity, wherein the two outermost heat-conducting parts 7 are connected to the water inlet 9 and the water outlet 10 respectively.

[0032] The connecting portion 8 is a hollow structure, the inner side wall of the connecting portion 8 is arc-shaped, the outer side wall of the connecting portion 8 is a smooth straight line, and the outer side wall of the connecting portion 8 is parallel to the end side wall of the diversion and heat exchange portion 7. The inner side of the arc can optimize the fluid path, guide the coolant to pass through the bend more smoothly, reduce the fluid resistance caused by sharp turns, help maintain the speed and stability of the coolant, avoid the formation of vortexes or backflows at the bends, thereby reducing energy loss, and can also effectively reduce the pressure drop of the coolant at the bends, ensuring that the coolant can flow smoothly to the next diversion and heat exchange portion 7. In addition, it also helps to optimize the fluid distribution of the coolant at the bends, ensuring that the coolant can evenly cover the entire cooling area, which helps to improve the cooling efficiency and reduce the possibility of heat accumulation and hot spot formation; the straight outer side can reduce the friction between the coolant and the side wall, reduce fluid resistance, and improve the diversion efficiency.

[0033] The setting of the guide and heat exchange part 7 with a hollow long plate structure, compared with the long tubular guide channel, expands the heat exchange contact area and improves the heat exchange efficiency. The setting of the guide and heat exchange part 7 with a hollow long plate structure and the connection part 8 is conducive to allowing the liquid cooling cavity to cover each battery cell, taking away the heat of each battery cell while better controlling the flow path and flow pressure of the coolant, ensuring that the pressure difference of the liquid at each location is small, and can make the coolant flow field in the guide and heat exchange part 7 at each position of the liquid cooling plate 1 uniformly distributed, so as to ensure uniform cooling of the battery, improve the cooling effect, reduce the impact on battery life, and at the same time reduce the use of materials.

[0034] The water inlet pipe group includes a water inlet main pipe 2 and a water inlet branch pipe 3. The water inlet main pipe 2 is used to connect to the liquid cooling unit. The water inlet main pipe 2 contains a first vertical section. There are several water inlet branch pipes 3. Several water inlet branch pipes 3 are fixedly arranged on the first vertical section of the water inlet main pipe 2 at vertical intervals. The water inlet main pipe 2 is connected to the water inlet 9 of the adjacent liquid cooling plate 1 through the water inlet branch pipe 3. The number of first vertical sections of the water inlet main pipe 2 is the same as the number of liquid cooling plate groups, and the number of water inlet branches 3 on the first vertical section is the same as the number of liquid cooling plates 1 of a single group of liquid cooling plates.

[0035] The water outlet pipe group includes a water outlet main pipe 4 and a water outlet branch pipe 5. The water outlet main pipe 4 is used to connect to the liquid cooling unit. The water outlet main pipe 4 has a second vertical section. There are several water outlet branch pipes 5. The several water outlet branch pipes 5 are fixedly arranged on the second vertical section of the water outlet main pipe 4 at vertical intervals. The water outlet main pipe 4 is connected to the water outlet 10 of the adjacent liquid cooling plate 1 through the water outlet branch pipe 5. The number of second vertical sections of the water outlet main pipe 4 is the same as the number of liquid cooling plate groups, and the number of water outlet branch pipes 5 on the second vertical section is the same as the number of liquid cooling plates 1 in a single group of liquid cooling plates.

[0036] The water inlet 9 of a single liquid cooling plate 1 is connected to a water inlet branch pipe 3, and the water outlet 10 is connected to a water outlet branch pipe 5. The water inlet branch pipe 3 and the water outlet branch pipe 5 connected to the same liquid cooling plate 1, the height of the connection between the water inlet branch pipe 3 and the first vertical section (i.e., the water inlet end of the water inlet branch pipe 3), and the height of the connection between the water outlet branch pipe 5 and the second vertical section (i.e., the water outlet end of the water outlet branch pipe 5) are all higher than the corresponding liquid cooling plate 1, and the height of the connection between the water inlet branch pipe 3 and the first vertical section is higher than the height of the connection between the water outlet branch pipe 5 and the second vertical section, thereby assisting the flow of cooling liquid through gravity to reduce the demand for pumping power, thereby reducing the energy consumption of the system.

[0037] The water inlet branch pipe 3 contains multiple first bends. In this embodiment, the water inlet branch pipe 3 is provided with three first bends, which can reduce the retention of bubbles and alleviate the scouring of the coolant on the guide heat exchange part 7, thereby facilitating the control of the coolant flow rate in the guide heat exchange part 7 and ensuring that the coolant flow rate in the guide heat exchange part 7 at various positions of the liquid cooling plate 1 is uniform.

[0038] The water outlet branch pipe 5 contains multiple second bends, and the number of the second bends is less than the first bends. In this embodiment, the water outlet branch pipe 5 is provided with two second bends, and the curvature of the second bend is greater than that of the first bend, so that the water outlet speed of the liquid cooling plate 1 is slightly greater than the water inlet speed, thereby improving the cooling efficiency, reducing scaling and corrosion, and reducing energy consumption.

[0039] It should be noted that the water outlet flow rate should not be too fast to avoid unnecessary pressure drop and energy loss. The specific flow rate needs to be determined according to actual design requirements and no excessive restrictions are imposed here.

[0040] Example 2

[0041] In another typical embodiment of the present invention, an energy storage device is proposed, which adopts the liquid cooling structure mentioned in Example 1. The energy storage device also includes: a battery module, a shell and a liquid cooling unit. The liquid cooling structure is installed in the shell. A battery module is installed on each liquid cooling plate 1, and the water inlet main pipe 2 and the water outlet main pipe 4 are both connected to the liquid cooling unit.

[0042] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid cooling structure comprising: A liquid cooling plate group, an inlet pipe group and an outlet pipe group connected to the liquid cooling plate group, wherein the liquid cooling plate group is composed of a liquid cooling plate (1), characterized in that the liquid cooling plate (1) includes a liquid cooling plate body (6) and a serpentine liquid cooling cavity, the liquid cooling cavity is fixedly arranged on the liquid cooling plate body (6), the liquid cooling cavity includes a plurality of flow guiding and heat exchanging parts (7), the flow guiding and heat exchanging parts (7) are hollow long plate-like structures, the plurality of flow guiding and heat exchanging parts (7) are arranged in sequence and parallel to each other along the width direction of the liquid cooling plate body (6), one end of two adjacent flow guiding and heat exchanging parts (7) are connected by a connecting part (8), the adjacent connecting parts (8) are staggered, the inner side wall of the connecting part (8) is an arc, and the outer side wall of the connecting part (8) is a smooth straight line.

2. The liquid cooling structure according to claim 1, characterized in that: The width of the flow-guiding and heat-exchanging portion (7) is greater than the spacing between adjacent flow-guiding and heat-exchanging portions (7).

3. The liquid cooling structure according to claim 1, characterized in that: At least one liquid cooling plate group is provided, the liquid cooling plate group comprising at least two liquid cooling plates (1) spaced apart in the vertical direction, the water inlet (9) of the liquid cooling plate (1) being connected to the water inlet pipe group, and the water outlet (10) of the liquid cooling plate (1) being connected to the water outlet pipe group.

4. The liquid cooling structure according to claim 3, characterized in that: The water inlet pipe group includes a water inlet main pipe (2) and a water inlet branch pipe (3). The water inlet main pipe (2) includes a first vertical section. A plurality of water inlet branch pipes (3) are fixedly arranged on the first vertical section at vertical intervals. The water inlet branch pipes (3) are connected to the water inlet (9) of the adjacent liquid cooling plate (1).

5. The liquid cooling structure according to claim 4, characterized in that: The water outlet pipe group includes a water outlet main pipe (4) and a water outlet branch pipe (5). The water outlet main pipe (4) includes a second vertical section. A plurality of water outlet branch pipes (5) are fixedly arranged on the second vertical section at vertical intervals. The water outlet branch pipes (5) are connected to the water outlet (10) of the adjacent liquid cooling plate (1).

6. The liquid cooling structure according to claim 5, characterized in that: The number of the first vertical sections and the second vertical sections is the same as the number of liquid cooling plate groups, and the number of the water inlet branch pipes (3) and the water outlet branch pipes (5) is the same as the number of liquid cooling plates (1).

7. The liquid cooling structure according to claim 6, characterized in that: The water inlet branch pipe (3) and the water outlet branch pipe (5) connected to the same liquid cooling plate (1) have a water inlet end height of the water inlet branch pipe (3) and a water outlet end height of the water outlet branch pipe (5) that are both higher than the corresponding liquid cooling plate (1), and the water inlet end height of the water inlet branch pipe (3) is higher than the water outlet end height of the water outlet branch pipe (5).

8. The liquid cooling structure according to claim 6, characterized in that: The water inlet branch pipe (3) includes a plurality of first bends, and the water outlet branch pipe (5) includes a plurality of second bends, the number of the second bends is less than the number of the first bends, and the curvature of the second bends is greater than that of the first bends.

9. An energy storage device, characterized in that: A liquid cooling structure as described in any one of claims 1 to 8 is adopted.

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