Liquid cooling structure and energy storage battery PACK system

Abstract

The utility model discloses a liquid cooling structure and an energy storage battery PACK system, the liquid cooling structure comprises a liquid inlet assembly, a liquid outlet assembly, a liquid cooling bottom plate and at least two liquid cooling side plates, the liquid cooling bottom plate is internally provided with a liquid inlet area and a liquid outlet area; each of the liquid cooling bottom plate and the liquid cooling side plate is provided with a liquid inlet and a liquid outlet, the liquid cooling side plate with the liquid inlet communicated with the liquid inlet assembly is located at the liquid outlet area of the liquid cooling bottom plate, and the liquid cooling side plate with the liquid outlet communicated with the liquid outlet assembly is located at the liquid inlet area of the liquid cooling bottom plate; according to the utility model, through the arrangement of the liquid cooling bottom plate and the two liquid cooling side plates, compared with the existing liquid cooling structure, the temperature difference of all parts of the energy storage battery is lower, and the influence on the service life of the energy storage battery due to the overlarge temperature difference is effectively reduced; besides, the liquid outlet connecting pipe and the liquid inlet connecting pipe which are of an L-shaped structure are adopted, the adverse effect of the flow speed of cooling liquid on the overall stability of the liquid cooling structure is effectively reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage battery cooling, in particular to a liquid cooling structure and an energy storage battery PACK system. Background Art

[0002] In the prior art, the liquid cooling structure used for the energy storage battery PCAK system mostly adopts a single liquid cooling plate. For example, patent application number CN202411062498.4 discloses an industrial energy storage lithium battery cooling mechanism. In the case of a single liquid cooling plate, the temperature of the liquid cooling plate area near the liquid inlet is significantly lower than the liquid cooling plate area near the liquid outlet. This will lead to uneven battery temperature and unbalanced electrochemical reactions inside the battery, thereby increasing the risk of battery aging and further shortening the battery life. Based on this, it is necessary to design a liquid cooling structure and energy storage battery PACK system with uniform temperature. Utility Model Content

[0003] The utility model provides a liquid cooling structure and an energy storage battery PACK system, which can at least solve one problem pointed out in the background technology.

[0004] A liquid cooling structure includes a liquid inlet assembly, a liquid outlet assembly, a liquid cooling base plate, and at least two liquid cooling side plates, wherein the liquid cooling base plate has a liquid inlet area and a liquid outlet area;

[0005] The liquid-cooled bottom plate and the liquid-cooled side plate each have a liquid inlet and a liquid outlet. The liquid inlet of the liquid-cooled bottom plate is connected to the liquid inlet assembly, and the liquid outlet of the liquid-cooled bottom plate is connected to the liquid outlet assembly. The liquid inlet of one liquid-cooled side plate is connected to the liquid inlet assembly, and the liquid outlet of the other liquid-cooled side plate is connected to the liquid outlet assembly. The liquid inlets and liquid outlets of two adjacent liquid-cooled plates are connected through a series pipeline.

[0006] The liquid cooling side plate whose liquid inlet is connected to the liquid inlet assembly is located at the liquid outlet area of ​​the liquid cooling bottom plate, and the liquid cooling side plate whose liquid outlet is connected to the liquid outlet assembly is located at the liquid inlet area of ​​the liquid cooling bottom plate.

[0007] The liquid inlet assembly includes a liquid inlet tee fitting and a bottom plate liquid inlet pipe and a side plate liquid inlet pipe connected to the liquid inlet tee fitting. The bottom plate liquid inlet pipe is connected to the liquid inlet of the liquid-cooled bottom plate, and the side plate liquid inlet pipe is connected to the liquid inlet of one of the liquid-cooled side plates.

[0008] The liquid outlet assembly includes a liquid outlet tee fitting and a bottom plate liquid outlet pipe and a side plate liquid outlet pipe connected to the liquid outlet tee fitting. The bottom plate liquid outlet pipe is connected to the liquid outlet of the liquid-cooled bottom plate, and the side plate liquid outlet pipe is connected to the liquid outlet of one of the liquid-cooled side plates.

[0009] Thermal pads are provided on both sides of the liquid cooling side plates.

[0010] The liquid-cooling side plate has a plurality of parallel liquid-cooling channels inside, and the plurality of liquid-cooling channels are distributed in a stepped manner.

[0011] The side plate liquid inlet pipe includes an inner liquid inlet pipe, an outer liquid inlet pipe, and a liquid inlet connecting pipe connecting the inner liquid inlet pipe and the outer liquid inlet pipe, the outer liquid inlet pipe is connected to the liquid inlet tee pipe fitting, and the inner liquid inlet pipe is connected to the liquid inlet port of one of the liquid-cooled side plates;

[0012] Preferably, the portion where the liquid inlet connecting pipe is connected to the liquid inlet inner pipe is L-shaped.

[0013] Preferably, the side plate liquid outlet pipe includes an inner liquid outlet pipe, an outer liquid outlet pipe, and a liquid outlet connecting pipe connecting the inner liquid outlet pipe and the outer liquid outlet pipe, the outer liquid outlet pipe is connected to the liquid outlet tee pipe fitting, and the inner liquid outlet pipe is connected to the liquid outlet of one of the liquid-cooled side plates;

[0014] Preferably, the portion where the liquid outlet connecting pipe is connected to the liquid outlet inner pipe is L-shaped;

[0015] Preferably, the liquid outlet inner tubes and the liquid inlet inner tubes are distributed in a staggered manner;

[0016] An energy storage battery PACK system includes the above-mentioned liquid cooling structure and multiple battery modules. The multiple battery modules are all located on the upper side of the liquid cooling bottom plate, and the liquid cooling side plate is located between two adjacent battery modules.

[0017] Compared with the existing technology, the present invention has the following beneficial effects: the layout of the liquid cooling bottom plate and two liquid cooling side plates in the present invention reduces the temperature difference between different parts of the energy storage battery compared with the existing liquid cooling structure, effectively reducing the impact of excessive temperature difference on the service life of the energy storage battery;

[0018] In addition, an L-shaped liquid outlet connecting pipe and liquid inlet connecting pipe are also used to effectively reduce the adverse effects of the coolant flow rate on the overall stability of the liquid cooling structure and improve the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the liquid cooling structure;

[0020] Figure 2 It is a structural diagram of the energy storage battery PACK system;

[0021] Figure 3 Schematic diagram of the internal structure of the liquid cooling base plate;

[0022] Figure 4 Schematic diagram of the internal structure of the liquid-cooled side panel.

[0023] Description of reference numerals:

[0024] 1-Liquid cooling base plate, 2-Liquid cooling side plate, 3-Battery module, 4-Series pipeline, 5-Liquid inlet area, 6-Liquid outlet area, 7-Liquid inlet tee fitting, 8-Base plate liquid inlet pipe, 9-Liquid inlet inner pipe, 10-Liquid inlet outer pipe, 11-Liquid inlet connecting pipe, 12-Liquid outlet tee fitting, 13-Base plate liquid outlet pipe, 14-Liquid outlet inner pipe, 15-Liquid outlet outer pipe, 16-Liquid outlet connecting pipe, 17-Thermal pad, 18-Liquid cooling channel, 19-Side plate. DETAILED DESCRIPTION

[0025] A specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0026] Example 1

[0027] like Figures 1 to 4 As shown, an embodiment of the present invention provides a liquid cooling structure, which includes a liquid inlet assembly, a liquid outlet assembly, a liquid cooling base plate 1, and at least two liquid cooling side plates 2. This embodiment takes two liquid cooling side plates 2 as an example. In actual use, those skilled in the art can make adaptive selections based on the number and volume of battery modules 3.

[0028] The liquid inlet assembly is connected to an external coolant supply device, and the liquid outlet assembly can be connected to an external coolant recovery device;

[0029] The liquid-cooled bottom plate 1 and the liquid-cooled side plate 2 of this embodiment both have a liquid inlet and a liquid outlet. The liquid inlet of the liquid-cooled bottom plate 1 is connected to the liquid inlet assembly, and the liquid outlet of the liquid-cooled bottom plate 1 is connected to the liquid outlet assembly. The liquid inlet of one liquid-cooled side plate 2 is connected to the liquid inlet assembly, and the liquid outlet of the other liquid-cooled side plate 2 is connected to the liquid outlet assembly. The liquid inlets and liquid outlets of two adjacent liquid-cooled plates are connected via a series pipe 4.

[0030] The liquid-cooling base plate 1 of this embodiment is placed on the lower side of the battery module 3 and has a liquid inlet area 5 and a liquid outlet area 6 therein. The liquid inlet area 5 refers to the area near the liquid inlet, and the liquid outlet area 6 refers to the area near the liquid outlet. The two are connected to each other. During use, the temperature of the liquid inlet area 5 will be lower than the temperature of the liquid outlet area 6. To reduce the adverse effects of this temperature difference on the battery, the liquid-cooling side plate 2 of this embodiment, where the liquid inlet is connected to the liquid inlet assembly, is located at the liquid outlet area 6 of the liquid-cooling base plate 1, and the liquid outlet is connected to the liquid outlet assembly. The liquid-cooling side plate 2 is located at the liquid inlet area 5 of the liquid-cooling base plate 1;

[0031] The temperature of the liquid-cooled side plate 2 whose liquid inlet is connected to the liquid inlet assembly is lower than that of the liquid-cooled side plate 2 whose liquid outlet is connected to the liquid outlet assembly. Therefore, the two are staggered, with the higher-temperature liquid-cooled side plate 2 located in the lower-temperature liquid inlet area 5 and the lower-temperature liquid-cooled side plate 2 located in the higher-temperature liquid outlet area 6. This reduces the temperature difference between different parts of the battery pack and keeps the battery pack within the optimal temperature range.

[0032] In order to realize that the liquid inlet assembly simultaneously supplies coolant to the liquid-cooled bottom plate 1 and all the liquid-cooled side plates 2, the liquid inlet assembly includes a liquid inlet tee fitting 7 and a bottom plate liquid inlet pipe 8 and a side plate liquid inlet pipe connected to the liquid inlet tee fitting 7. The bottom plate liquid inlet pipe 8 is communicated with the liquid inlet of the liquid-cooled bottom plate 1, and the side plate liquid inlet pipe is communicated with the liquid inlet of one of the liquid-cooled side plates 2. The side plate liquid inlet pipe includes an inner liquid inlet pipe 9, an outer liquid inlet pipe 10, and a liquid inlet connecting pipe 11 connecting the inner liquid inlet pipe 9 and the outer liquid inlet pipe 10. The outer liquid inlet pipe 10 is connected to the liquid inlet tee fitting 7, and the inner liquid inlet pipe 9 is communicated with the liquid inlet of one of the liquid-cooled side plates 2.

[0033] Similarly, the liquid outlet assembly includes a liquid outlet tee fitting 12 and a bottom plate liquid outlet pipe 13 and a side plate liquid outlet pipe connected to the liquid outlet tee fitting 12. The bottom plate liquid outlet pipe 13 is connected to the liquid outlet of the liquid-cooled bottom plate 1, and the side plate liquid outlet pipe is connected to the liquid outlet of one of the liquid-cooled side plates 2. The side plate liquid outlet pipe includes an inner liquid outlet pipe 14, an outer liquid outlet pipe 15, and a liquid outlet connecting pipe 16 connecting the inner liquid outlet pipe 14 and the outer liquid outlet pipe 15. The outer liquid outlet pipe 15 is connected to the liquid outlet tee fitting 12, and the inner liquid outlet pipe 14 is connected to the liquid outlet of one of the liquid-cooled side plates 2.

[0034] In this embodiment, the liquid-cooled side plate 2 directly connected to the liquid inlet assembly is located at the liquid outlet assembly, and the liquid-cooled side plate 2 directly connected to the liquid outlet assembly is located at the liquid inlet assembly, that is, the two are staggered, so the liquid inlet inner tube 9 and the liquid outlet inner tube 14 are also staggered, and the conventional liquid inlet connecting pipe 11 adopts a straight tube structure, and the liquid inlet inner tube 9 and the liquid outlet inner tube 14 both need to be bent, so the impact force of the coolant is applied to the liquid inlet inner tube 9 and the liquid outlet inner tube 14, firstly, it affects the service life of the liquid inlet inner tube 9 and the liquid outlet inner tube 14, and secondly, it is easy to cause leakage at the connection. Therefore, the part of the liquid inlet connecting pipe 11 of this embodiment that is connected to the liquid inlet inner tube 9 is L-shaped, and the part of the liquid outlet connecting pipe 16 that is connected to the liquid outlet inner tube 14 is also L-shaped, so the coolant impact force is applied to the metal connecting pipe, so the above two problems do not exist, thereby making the overall liquid cooling structure more stable;

[0035] In order to allow the battery pack to better contact with the liquid-cooled side plate 2 and avoid a gap between the two, thermal pads 17 are provided on both sides of the liquid-cooled side plate 2;

[0036] The liquid-cooling side plate 2 has multiple parallel liquid-cooling channels 18 inside, and the multiple liquid-cooling channels 18 are distributed in a stepped manner; in addition, the liquid inlets or liquid outlets for series connection between the liquid-cooling side plates 2 are located at a lower position, and the liquid inlets or liquid outlets connecting the liquid-cooling side plates 2 to the liquid inlet assembly or liquid outlet assembly are located at a higher position;

[0037] Example 2

[0038] like Figure 2 As shown, this embodiment provides an energy storage battery PACK system, including the liquid cooling structure of the first embodiment, and further including a plurality of battery modules 3, wherein the plurality of battery modules 3 are all located on the upper side of the liquid cooling bottom plate 1, and the liquid cooling side plate 2 is located between two adjacent battery modules 3;

[0039] The energy storage battery PACK system further includes a side plate 19, which is fixedly connected to the liquid cooling base plate 1, and the liquid inlet connecting pipe 11 and the liquid outlet connecting pipe 16 are both installed on the side plate 19;

[0040] In some other embodiments, the energy storage battery PACK system further includes a shell structure for accommodating the liquid cooling system and the battery module 3 .

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit and essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0042] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A liquid cooling structure, characterized in that: It comprises a liquid inlet assembly, a liquid outlet assembly, a liquid cooling base plate (1) and at least two liquid cooling side plates (2); the liquid cooling base plate (1) has a liquid inlet area (5) and a liquid outlet area (6) inside; The liquid-cooling bottom plate (1) and the liquid-cooling side plate (2) both have a liquid inlet and a liquid outlet. The liquid inlet of the liquid-cooling bottom plate (1) is connected to the liquid inlet assembly, and the liquid outlet of the liquid-cooling bottom plate (1) is connected to the liquid outlet assembly. The liquid inlet of one liquid-cooling side plate (2) is connected to the liquid inlet assembly, and the liquid outlet of the other liquid-cooling side plate (2) is connected to the liquid outlet assembly. The liquid inlets and liquid outlets of two adjacent liquid-cooling plates are connected via a series pipeline (4). The liquid cooling side plate (2) whose liquid inlet is connected to the liquid inlet assembly is located at the liquid outlet area (6) of the liquid cooling bottom plate (1), and the liquid cooling side plate (2) whose liquid outlet is connected to the liquid outlet assembly is located at the liquid inlet area (5) of the liquid cooling bottom plate (1).

2. The liquid cooling structure according to claim 1, wherein: The liquid inlet assembly comprises a liquid inlet three-way pipe fitting (7) and a bottom plate liquid inlet pipe (8) and a side plate liquid inlet pipe connected to the liquid inlet three-way pipe fitting (7); the bottom plate liquid inlet pipe (8) is connected to the liquid inlet of the liquid-cooled bottom plate (1), and the side plate liquid inlet pipe is connected to the liquid inlet of one of the liquid-cooled side plates (2).

3. The liquid cooling structure according to claim 1, wherein: The liquid outlet assembly comprises a liquid outlet three-way pipe fitting (12), a bottom plate liquid outlet pipe (13) and a side plate liquid outlet pipe connected to the liquid outlet three-way pipe fitting (12); the bottom plate liquid outlet pipe (13) is connected to the liquid outlet of the liquid-cooled bottom plate (1), and the side plate liquid outlet pipe is connected to the liquid outlet of one of the liquid-cooled side plates (2).

4. The liquid cooling structure according to claim 1, wherein: Thermal pads (17) are provided on both sides of the liquid-cooled side plate (2).

5. The liquid cooling structure according to claim 1, wherein: The liquid cooling side plate (2) has a plurality of parallel distributed liquid cooling channels (18) inside, and the plurality of liquid cooling channels (18) are distributed in a stepped manner.

6. The liquid cooling structure according to claim 1, wherein: The side plate liquid inlet pipe comprises an inner liquid inlet pipe (9), an outer liquid inlet pipe (10), and a liquid inlet connecting pipe (11) connecting the inner liquid inlet pipe (9) and the outer liquid inlet pipe (10); the outer liquid inlet pipe (10) is connected to the liquid inlet three-way pipe fitting (7); and the inner liquid inlet pipe (9) is connected to the liquid inlet of one of the liquid-cooled side plates (2); The portion where the liquid inlet connecting pipe (11) is connected to the liquid inlet inner pipe (9) is L-shaped.

7. The liquid cooling structure according to claim 6, wherein: The side plate liquid outlet pipe comprises a liquid outlet inner pipe (14), a liquid outlet outer pipe (15), and a liquid outlet connecting pipe (16) connecting the liquid outlet inner pipe (14) and the liquid outlet outer pipe (15); the liquid outlet outer pipe (15) is connected to the liquid outlet three-way pipe fitting (12); and the liquid outlet inner pipe (14) is communicated with the liquid outlet of one of the liquid-cooled side plates (2); The portion where the liquid outlet connecting pipe (16) is connected to the liquid outlet inner pipe (14) is L-shaped; The liquid outlet inner tube (14) and the liquid inlet inner tube (9) are distributed in a staggered manner.

8. An energy storage battery PACK system, comprising the liquid cooling structure according to any one of claims 1 to 7, characterized in that: It also includes a plurality of battery modules (3), wherein the plurality of battery modules (3) are all located on the upper side of the liquid-cooling bottom plate (1), and the liquid-cooling side plate (2) is located between two adjacent battery modules (3).

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