Battery cooling structure

Abstract

The utility model relates to the technical field of battery cooling, in particular to a battery cooling structure, which is characterized in that a plurality of parallel side plates are mounted on a bottom plate, a liquid inlet is formed in one end of each side plate along the length direction, a liquid outlet is formed in the other end of each side plate, and a flow channel is arranged between the liquid inlet and the liquid outlet; the side plates are divided into forward side plates and reverse side plates, the liquid inlets of all the forward side plates are located at the same end, the liquid inlets of all the reverse side plates are located at the same end, the liquid inlets of the forward side plates and the liquid inlets of the reverse side plates are opposite in direction, and the liquid outlets of the forward side plates are communicated with the liquid inlets of the reverse side plates. According to the battery pack, the side plates are divided into the forward side plate and the reverse side plate which are placed in opposite directions, cooling liquid enters from the liquid inlet of the forward side plate and finally flows out from the liquid outlet of the reverse side plate, and the liquid inlet of the forward side plate and the liquid outlet of the reverse side plate are located on the same side, so that the overall space utilization rate of the battery pack can be increased; and the battery modules in the battery pack can be effectively cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cooling, in particular to a battery cooling structure. Background Art

[0002] With the rapid increase in the scale of energy storage installations around the world, the frequency of energy storage safety accidents has also increased significantly. Thermal runaway of lithium batteries is the main reason affecting the safe operation of energy storage power stations. Temperature control is an important factor in avoiding thermal runaway of lithium batteries, and a reasonable and efficient heat dissipation system is the main method to solve the thermal runaway problem. Therefore, in order to ensure that the battery operates at normal operating temperature and improve its life and safety, liquid cooling technology is widely used in battery packs.

[0003] Currently, the bottom cooling solution is the mainstream solution for liquid cooling of energy storage battery PACK. It places the liquid cooling plate at the bottom of the battery cell, and the coolant is injected from the cold plate at the bottom of the battery cell. The heat generated by the battery cell is absorbed and taken away by the flow of coolant. The main problem of this solution is that the thermal resistance of the battery cell in the height direction is large, and the heat is not easy to transfer to the bottom. In addition, the contact area between the bottom of the battery cell and the liquid cooling plate is small, and the heat dissipation effect is limited.

[0004] As the energy density and charge / discharge rate of battery cells increase, the heat generation power of the battery cells also increases, and bottom cooling has gradually failed to meet the heat dissipation requirements of the energy storage PACK. Therefore, a side cooling method has emerged, in which side panels are set on both sides of the battery pack and between two adjacent battery packs. The side panels have cooling channels, and the coolant passes through the cooling channels to remove the heat from the battery pack from the side. However, the side cooling method has the problem that the coolant inlet and outlet are not on the same side of the overall structure of the battery pack, which reduces the overall space utilization of the battery pack. Utility Model Content

[0005] In order to solve the technical problem that the coolant inlet and outlet of the side cooling method are not on the same side of the overall structure of the battery pack, which reduces the overall space utilization of the battery pack, the utility model provides a battery cooling structure.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A battery cooling structure comprises a bottom plate, on which a plurality of mutually parallel side plates are mounted, each side plate being arranged perpendicularly to the bottom plate, each side plate being provided with a liquid inlet at one end along the length direction, each side plate being provided with a liquid outlet at the other end along the length direction, and a flow channel being provided between the liquid inlet and the liquid outlet; the side plates are divided into forward side plates and reverse side plates, the liquid inlets of all forward side plates are located at the same end, the liquid inlets of all reverse side plates are located at the same end, the liquid inlets of the forward side plates and the liquid inlets of the reverse side plates are in opposite directions, and the liquid outlets of the forward side plates are connected to the liquid inlets of the reverse side plates. In this solution, a battery module is installed between two adjacent side panels, and the side panels are divided into a positive side panel and a negative side panel placed in opposite directions. The coolant enters from the liquid inlet of the positive side panel and finally flows out from the liquid outlet of the negative side panel. The liquid inlet of the positive side panel and the liquid outlet of the negative side panel are located on the same side, thereby improving the overall space utilization of the battery pack and effectively cooling the battery modules in the battery pack.

[0008] As a preferred implementation of a battery cooling structure, the liquid inlets of all the positive side panels are connected through a liquid inlet hose, the liquid outlets of all the reverse side panels are connected through a liquid outlet hose, and the liquid outlets of all the positive side panels and the liquid inlets of all the reverse side panels are connected through a connecting hose. All the positive side panels are connected, all the reverse side panels are connected, and the liquid outlets of the positive side panels are connected to the liquid inlets of the reverse side panels, so that the pressure of the coolant is uniform.

[0009] As a preferred implementation of a battery cooling structure, the side plate located at one of the outermost positions of the bottom plate is a reverse side plate, and the other side plates are forward side plates, making the distribution of the liquid inlet hose, the liquid outlet hose and the connecting hose more concise and clear.

[0010] As a preferred implementation of a battery cooling structure, four positive side plates are provided and one negative side plate is provided. The flow direction of the coolant is four in and one out, the overall flow is more uniform, and the heat dissipation effect is optimal.

[0011] As a preferred implementation of a battery cooling structure, the liquid inlet hose is provided with a liquid inlet through hole, and the liquid inlet through hole is located between the two positive side plates farthest from the reverse side plate, thereby further improving the uniformity of the overall flow of the coolant and the heat dissipation effect.

[0012] As a preferred implementation of the battery cooling structure, a thermal pad is connected to the side of the side plate facing the battery. The heat generated by the battery module is transferred to the surface of the side plate through the thermal pad, and the thermal pad can play a role in transferring heat.

[0013] As a preferred implementation of the battery cooling structure, the side of the thermal pad facing the battery is provided with adhesive, so that the side plate can be attached to the surface of the battery module through the thermal pad, which can improve the effect of heat transfer and strengthen the connection between the side plate and the battery module.

[0014] As a preferred implementation of a battery cooling structure, each side plate is provided with channels on both sides in the length direction, and each side plate is provided with a plurality of flow channels, and each channel in each side plate is connected to all flow channels, and the liquid inlet is provided in the channel on one side of the side plate, and the liquid outlet is provided in the channel on the other side of the side plate. There are multiple flow channels, which can effectively reduce the pressure drop of the coolant inside each side plate.

[0015] As a preferred implementation of a battery cooling structure, the channel is arranged vertically to the bottom plate, and a plurality of flow channels are arranged horizontally and along the height direction.

[0016] As a preferred implementation of a battery cooling structure, the liquid inlet is opened at the bottom of the channel on one side of the side plate, and the liquid outlet is opened at the bottom of the channel on the other side of the side plate.

[0017] The beneficial effects of the utility model are:

[0018] In this solution, a battery module is installed between two adjacent side panels, and the side panels are divided into a positive side panel and a negative side panel placed in opposite directions. The coolant enters from the liquid inlet of the positive side panel and finally flows out from the liquid outlet of the negative side panel. The liquid inlet of the positive side panel and the liquid outlet of the negative side panel are located on the same side, thereby improving the overall space utilization of the battery pack and effectively cooling the battery modules in the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of a three-dimensional structure of a battery cooling structure in a specific implementation mode of the utility model;

[0021] Figure 2 A schematic diagram of the coolant flow direction of a battery cooling structure in a specific implementation manner of the utility model;

[0022] Figure 3 It is a schematic diagram of the partial structure of the side panel in a specific implementation manner of the utility model;

[0023] List of parts and reference numerals:

[0024] 1. Bottom plate; 2. Side plate; 3. Liquid inlet; 4. Liquid outlet; 5. Flow channel; 6. Forward side plate; 7. Reverse side plate; 8. Liquid inlet hose; 9. Liquid outlet hose; 10. Connecting hose; 11. Thermal pad; 12. Channel; 13. Liquid inlet through hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0026] Reference Figure 1-3 The present embodiment proposes a battery cooling structure, including a bottom plate 1, the floor plays a supporting role, a plurality of mutually parallel side plates 2 are installed on the bottom plate 1, each side plate 2 is arranged perpendicular to the bottom plate 1, each side plate 2 is provided with a liquid inlet 3 at one end along the length direction, each side plate 2 is provided with a liquid outlet 4 at the other end along the length direction, and a flow channel 5 is provided between the liquid inlet 3 and the liquid outlet 4; the side plates 2 are divided into a forward side plate 6 and a reverse side plate 7, the liquid inlets 3 of all the forward side plates 6 are located at the same end, the liquid inlets 3 of all the reverse side plates 7 are located at the same end, the liquid inlets 3 of the forward side plate 6 and the liquid inlets 3 of the reverse side plate 7 are in opposite directions, and the liquid outlet 4 of the forward side plate 6 is connected to the liquid inlet 3 of the reverse side plate 7. The liquid inlets 3 of all the positive side panels 6 are connected through the liquid inlet hose 8, the liquid outlets 4 of all the reverse side panels 7 are connected through the liquid outlet hose 9, and the liquid outlets 4 of all the positive side panels 6 and the liquid inlets 3 of all the reverse side panels 7 are connected through the connecting hose 10. The side of the side panel 2 facing the battery is connected with a thermal pad 11. The side of the thermal pad 11 facing the battery is provided with adhesive. Each side panel 2 is provided with a channel 12 on both sides in the length direction, and each side panel 2 is provided with a plurality of flow channels 5. The channel 12 in each side panel 2 is connected with all the flow channels 5. The liquid inlet 3 is opened in the channel 12 on one side of the side panel 2, and the liquid outlet 4 is opened in the channel 12 on the other side of the side panel 2. The channel 12 is arranged vertically with respect to the bottom panel 1, and the plurality of flow channels 5 are arranged horizontally and arranged in the height direction. The liquid inlet 3 is opened at the bottom of the channel 12 on one side of the side panel 2, and the liquid outlet 4 is opened at the bottom of the channel 12 on the other side of the side panel 2.

[0027] In this embodiment, the number and placement of the forward side panels 6 and the reverse side panels 7 can affect whether the coolant can be cooled uniformly and the cooling effect. Therefore, as a specific preferred solution, there are four forward side panels 6 in this embodiment, and one reverse side panel 7. The side panel 2 located at the outermost position of one of the bottom panels 1 is the reverse side panel 7, and the other side panels 2 are the forward side panels 6. The liquid inlet hose 8 is provided with a liquid inlet through hole 13, and the liquid inlet through hole 13 is located between the two forward side panels 6 farthest from the reverse side panel 7. Those skilled in the art should understand that the solution described in this paragraph is only an example of a preferred solution. Figure 2 , Figure 3 The arrows in the diagram indicate the direction of coolant flow.

[0028] The working principle of this scheme is:

[0029] In this solution, a battery module is installed between two adjacent side panels 2, and the side panels 2 are divided into a forward side panel 6 and a reverse side panel 7 placed in opposite directions. The coolant enters from the liquid inlet 3 of the forward side panel 6 through the liquid inlet hose 8, and all the coolant flowing out of the forward side panel 6 will enter the liquid inlet 3 of the reverse side panel 7 through the connecting hose 10, and finally flow out from the liquid outlet 4 of the reverse side panel 7 and be discharged through the liquid outlet hose 9. During the whole process, the coolant can take away the heat of the battery module from the side of the battery module, increase the heat exchange area, and reduce the problem of large temperature difference between the top and bottom of the battery module. The liquid inlet 3 of the forward side panel 6 and the liquid outlet 4 of the reverse side panel 7 are located on the same side, so that the overall space utilization of the battery pack can be improved, and the battery modules in the battery pack can be effectively cooled.

[0030] In this solution, depending on the different connection positions, the forward side plate 6 and the liquid inlet hose 8 and the connecting hose 10 can be connected by a right-angle joint or a three-way joint, and the reverse side plate 7 and the connecting hose 10 and the liquid outlet hose 9 can be connected by a right-angle joint or a three-way joint. The connection is made by quick-connect joints, which is convenient, simple and easy to install.

[0031] In this embodiment, each side plate 2 may have eight parallel flow channels 5 , and the flow directions in the flow channels 5 are consistent, which can effectively reduce the pressure drop of the coolant in the side plate 2 .

[0032] In this embodiment, a battery module is placed between two adjacent side panels 2. The battery module, the side panels 2, the liquid inlet hose 8, the liquid outlet hose 9, the connecting hose 10, the thermal pad 11 and other accessory structures in the prior art constitute a battery pack.

[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those 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 will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery cooling structure, comprising a bottom plate (1), characterized in that: A plurality of mutually parallel side plates (2) are mounted on the bottom plate (1), each side plate (2) is arranged perpendicular to the bottom plate (1), each side plate (2) is provided with a liquid inlet (3) at one end along the length direction, each side plate (2) is provided with a liquid outlet (4) at the other end along the length direction, and a flow channel (5) is provided between the liquid inlet (3) and the liquid outlet (4); the side plates (2) are divided into a forward side plate (6) and a reverse side plate (7), the liquid inlets (3) of all the forward side plates (6) are located at the same end, the liquid inlets (3) of all the reverse side plates (7) are located at the same end, the liquid inlets (3) of the forward side plates (6) and the liquid inlets (3) of the reverse side plates (7) are in opposite directions, and the liquid outlet (4) of the forward side plates (6) is connected to the liquid inlet (3) of the reverse side plates (7).

2. A battery cooling structure according to claim 1, characterized in that: The liquid inlets (3) of all the positive side plates (6) are connected via a liquid inlet hose (8), the liquid outlets (4) of all the negative side plates (7) are connected via a liquid outlet hose (9), and the liquid outlets (4) of all the positive side plates (6) and the liquid inlets (3) of all the negative side plates (7) are connected via a connecting hose (10).

3. A battery cooling structure according to claim 2, characterized in that: The side plate (2) located at the outermost position of one of the bottom plates (1) is a reverse side plate (7), and the other side plates (2) are forward side plates (6).

4. A battery cooling structure according to claim 3, characterized in that: Four positive side plates (6) are provided, and one negative side plate (7) is provided.

5. A battery cooling structure according to claim 4, characterized in that: The liquid inlet hose (8) is provided with a liquid inlet through hole (13), and the liquid inlet through hole (13) is located between two positive side plates (6) farthest from the reverse side plate (7).

6. A battery cooling structure according to claim 1, characterized in that: A heat-conducting pad (11) is connected to the side of the side plate (2) facing the battery.

7. A battery cooling structure according to claim 6, characterized in that: The side of the thermal pad (11) facing the battery is provided with adhesive.

8. A battery cooling structure according to claim 1, characterized in that: Each side plate (2) is provided with channels (12) on both sides in the length direction, each side plate (2) is provided with a plurality of flow channels (5), the channels (12) in each side plate (2) are connected to all the flow channels (5), the liquid inlet (3) is opened in the channel (12) on one side of the side plate (2), and the liquid outlet (4) is opened in the channel (12) on the other side of the side plate (2).

9. A battery cooling structure according to claim 8, characterized in that: The channel (12) is arranged vertically to the bottom plate (1), and the plurality of flow channels (5) are arranged horizontally and in a height direction.

10. A battery cooling structure according to claim 1, characterized in that: The liquid inlet (3) is opened at the bottom of the channel (12) on one side of the side plate (2), and the liquid outlet (4) is opened at the bottom of the channel (12) on the other side of the side plate (2).

Images