Cooling pipeline, composite battery liquid cooling plate and energy storage device

Abstract

The utility model relates to the technical field of battery cooling, and particularly discloses a cooling pipeline, a composite battery liquid cooling plate and an energy storage device.The cooling pipeline comprises a liquid cooling plate shell and a plurality of cooling assemblies arranged on the liquid cooling plate shell, each cooling assembly comprises two symmetrically-arranged first cooling pipes, each first cooling pipe is of an annular structure, and each first cooling pipe is of an annular structure; the first cooling pipe is provided with a water inlet end and a cooling end, a water inlet pipe is arranged in the liquid cooling plate shell, and the water inlet pipe is communicated with the water inlet end of the first cooling pipe; at least one mounting groove is formed in the bottom of the first cooling pipe, a second cooling pipe is fixedly mounted in the mounting groove, the shape of the second cooling pipe is the same as that of the first cooling pipe, and the flowing direction of cooling liquid in the second cooling pipe is opposite to that of cooling liquid in the first cooling pipe. The battery pack is cooled by the first cooling pipe, and the first cooling pipe is cooled by the second cooling pipe, so that the cooling effect of the first cooling pipe on the battery pack is improved.

Description

Technical Field

[0001] This application relates to the field of battery cooling technology, specifically a cooling pipe, a composite battery liquid cooling plate, and an energy storage device. Background Technology

[0002] A battery pack is a crucial component of an energy storage system, used to store or output electrical energy. A battery pack consists of a battery housing and individual battery cells installed within it. Several battery cells are connected in series or parallel to increase the pack's energy storage and output power. During operation, each battery cell generates a significant amount of heat. Excessive heat can cause battery cell expansion and damage, trigger fire suppression systems, and affect the normal operation of the entire battery pack. Therefore, a liquid cooling plate is installed inside the battery housing. This plate includes multiple cooling channels, through which the flow of coolant dissipates heat from the battery cells.

[0003] As the coolant flows through the cooling channels of the liquid cooling plate, it continuously exchanges heat with the battery cells. The temperature of the coolant gradually increases, and the temperature of the coolant at the outlet of the cooling channel is higher than that at the inlet of the cooling channel. This affects the heat dissipation effect of the coolant on the battery cells, causing uneven temperature distribution among the battery cells and thus reducing their performance. Utility Model Content

[0004] The purpose of this application is to provide a cooling pipe, a composite battery liquid cooling plate, and an energy storage device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A cooling pipe includes a first cooling pipe (20) having an installation groove extending along the length of the first cooling pipe (20); a second cooling pipe (40) is disposed in the installation groove and extends along the length of the first cooling pipe; the coolant inside the second cooling pipe (40) flows in the opposite direction to the coolant inside the first cooling pipe (20).

[0007] As a further improvement of this application, the mounting groove is disposed at the lower part of the first cooling pipe.

[0008] As a further aspect of this application: the first cooling pipe (20) has an inverted trapezoidal structure; there are two mounting slots, which are respectively located on the waist of the inverted trapezoidal structure.

[0009] In addition, this application also provides a composite battery liquid cooling plate, including a liquid cooling plate housing (10) and a plurality of cooling components disposed on the liquid cooling plate housing (10); the cooling components include two symmetrically arranged first cooling pipes (20), and the first cooling pipes (20) have a water inlet end (21) and a cooling end (22), the liquid cooling plate housing (10) is provided with a water inlet pipe (15), and the water inlet pipe (15) is connected to the water inlet end (21) of the first cooling pipe (20); the first cooling pipe (20) is provided with at least one mounting groove, and a second cooling pipe (40) is installed in the mounting groove; the coolant inside the second cooling pipe (40) flows in the opposite direction to the coolant inside the first cooling pipe (20).

[0010] As a further aspect of this application: a water inlet valve (16) is provided at the connection between the water inlet pipe (15) and the water inlet end (21) of the first cooling pipe (20); the water inlet valve (16) includes a shell (161), a baffle (164) and an expansion block (165); the shell (161) is a trapezoidal structure, the shell (161) has a long side end and a short side end, the long side end of the shell (161) is provided with a third water inlet (162), the short side end of the shell (161) is provided with at least one third drain outlet (163), the third water inlet (162) is connected to the water inlet pipe (15), and the third drain outlet (163) is connected to the water inlet end (21) of the first cooling pipe (20).

[0011] As a further embodiment of this application: the baffle (164) is disposed on the short side of the outer casing (161), and there is a water outlet gap between the baffle (164) and the third drain outlet (163). One side of the baffle (164) is connected to the expansion block (165), and a probe (167) is installed on the other side of the baffle (164). The probe (167) extends into the water inlet (21) of the first cooling pipe (20). The expansion block (165) is made of thermally expanding material, and the probe (167) is made of thermally conductive material.

[0012] As a further aspect of this application: a groove is provided in the short side end of the outer shell (161), a slider is slidably installed inside the groove, the expansion block (165) is connected to the slider, and the slider is connected to the groove through a connecting spring (166).

[0013] As a further aspect of this application: at least one first water inlet (11) is provided on the liquid cooling plate housing (10), and the first water inlet (11) is connected to the water inlet end (21) of the water inlet pipe (15); at least one second drain outlet (13) is provided at the bottom of the liquid cooling plate housing (10), and the second drain outlet (13) is connected to the drain end (22) of the water inlet pipe (15).

[0014] As a further aspect of this application: at least one first drain outlet (12) is provided on the liquid cooling plate housing (10), and the first drain outlet (12) is connected to the second cooling pipe (40); at least one second water inlet (14) is provided at the bottom of the liquid cooling plate housing (10), and the second water inlet (14) is connected to the second cooling pipe (40).

[0015] In addition, this application also provides an energy storage device, including the composite battery liquid cooling plate as described above and a battery pack (30) disposed on the composite battery liquid cooling plate.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a first cooling pipe and a second cooling pipe in the liquid cooling plate housing. The coolant inside the second cooling pipe flows in the opposite direction to the coolant inside the first cooling pipe. The first cooling pipe cools the battery pack, and the second cooling pipe cools the first cooling pipe, thereby improving the cooling effect of the first cooling pipe on the battery pack. This application also provides a water inlet valve at the water inlet end of the first cooling pipe, which controls the flow rate of coolant into the first cooling pipe. This ensures the cooling effect while reducing coolant loss and saving coolant costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a composite battery liquid cooling plate.

[0018] Figure 2 Schematic diagram of the energy storage device Figure 1 .

[0019] Figure 3 Schematic diagram of the energy storage device Figure 2 .

[0020] Figure 4 This is a schematic diagram of the first cooling pipe in the liquid cooling plate of a composite battery.

[0021] Figure 5 This is a schematic diagram of the structure when the first cooling pipe and the water inlet pipe are connected in the liquid cooling plate of the composite battery.

[0022] Figure 6 This is a schematic diagram of the water inlet valve in a composite battery liquid cooling plate.

[0023] Figure 7 This is a side view of the first and second cooling pipes in the liquid cooling plate of the composite battery.

[0024] Figure 8 This is a schematic diagram of the structure of the first and second cooling pipes in the liquid cooling plate of a composite battery.

[0025] In the diagram: 10-Liquid cooling plate housing, 11-First water inlet, 12-First drain outlet, 13-Second drain outlet, 14-Second water inlet, 15-Water inlet pipe, 16-Water inlet valve, 161-Outer shell, 162-Third water inlet, 163-Third drain outlet, 164-Block, 165-Expansion block, 166-Connecting spring, 167-Probe, 20-First cooling pipe, 21-Water inlet end, 22-Cooling end, 30-Battery pack, 40-Second cooling pipe. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] Please see Figures 1-8 In this embodiment of the application, a composite battery liquid cooling plate includes a liquid cooling plate housing 10 and a plurality of cooling components disposed on the liquid cooling plate housing 10. Each cooling component includes two symmetrically arranged first cooling pipes 20. The first cooling pipes 20 have an annular structure and have a water inlet end 21 and a cooling end 22. Figure 5 As shown, the liquid cooling plate housing 10 is provided with a water inlet pipe 15 inside. The water inlet pipe 15 is connected to the water inlet end 21 of the first cooling pipe 20. The water inlet pipe 15 is used to provide cooling liquid to the first cooling pipe 20, so that the cooling liquid flows along the first cooling pipe 20. During the process of the cooling liquid flowing along the first cooling pipe 20, the cooling liquid exchanges heat with the battery pack 30 provided on the liquid cooling plate housing 10, thereby cooling the battery pack 30.

[0028] like Figure 4 , 5As shown in Figures 7 and 8, in this embodiment of the application, a cooling pipe is also provided, including a first cooling pipe (20), on which an installation groove extending along the length direction of the first cooling pipe (20) is provided; a second cooling pipe (40) is provided in the installation groove, the second cooling pipe (40) extending along the length direction of the first cooling pipe in the installation groove; the coolant inside the second cooling pipe (40) flows in the opposite direction to the coolant inside the first cooling pipe (20). The installation groove is provided at the lower part of the first cooling pipe. The first cooling pipe (20) has an inverted trapezoidal structure; there are two installation grooves, which are respectively provided on the waist of the inverted trapezoidal structure.

[0029] In this embodiment of the application, at least one mounting groove is provided at the bottom of the first cooling pipe 20, and a second cooling pipe 40 is fixedly installed in the mounting groove. The second cooling pipe 40 has the same shape as the first cooling pipe 20, and a flowing coolant is provided inside the second cooling pipe 40. The flow direction of the coolant inside the second cooling pipe 40 is opposite to that of the coolant inside the first cooling pipe 20. It can be understood that when the coolant inside the first cooling pipe 20 cools the battery pack 30, the coolant inside the second cooling pipe 40 cools the coolant inside the first cooling pipe 20, thereby reducing the temperature of the coolant inside the first cooling pipe 20 and improving the cooling effect of the coolant inside the first cooling pipe 20 on the battery pack 30.

[0030] In this embodiment, a water inlet valve 16 is provided at the connection between the water inlet pipe 15 and the water inlet end 21 of the first cooling pipe 20. The water inlet valve 16 includes a housing 161, a baffle 164, and an expansion block 165. The housing 161 has a trapezoidal structure and has a long side end and a short side end. A third water inlet 162 is provided on the long side end of the housing 161, and at least one third drain outlet 163 is provided on the short side end of the housing 161. The third water inlet 162 is connected to the water inlet pipe 15, and the third drain outlet 163 is connected to the water inlet end 21 of the first cooling pipe 20. It can be understood that when the cooling liquid inside the water inlet pipe 15 flows to the water inlet end 21 of the first cooling pipe 20 through the water inlet valve 16, the cooling liquid flows from the long side end to the short side end, and the flow rate of the cooling liquid flowing into the water inlet end 21 of the first cooling pipe 20 increases, thereby improving the heat exchange effect of the coolant of the first cooling pipe 20 on the battery pack 30.

[0031] Furthermore, in this embodiment, the baffle 164 is disposed on the short side of the outer casing 161, and there is a water outlet gap between the baffle 164 and the third drain outlet 163. One side of the baffle 164 is connected to the expansion block 165, and the other side of the baffle 164 is equipped with a probe 167. The probe 167 extends into the water inlet 21 of the first cooling pipe 20. The expansion block 165 is made of a thermally expanding material, and the probe 167 is made of a thermally conductive material. When the temperature of the coolant inside the first cooling pipe 20 rises rapidly, the probe 167 transfers heat to the expansion block 165. After being heated, the expansion block 165 increases in volume, causing the baffle 164 to move away from the short side of the outer casing 161, thereby... The increased water outlet gap increases the flow rate of coolant into the inlet 21 of the first cooling pipe 20, improving the cooling effect of the coolant on the battery pack 30. When the temperature of the coolant inside the first cooling pipe 20 does not rise or rises slowly, the water outlet gap remains in its initial state, thereby reducing the flow rate of coolant entering the first cooling pipe 20 and reducing coolant consumption. In addition, a sliding groove is provided in the short side of the outer shell 161, and a slider is slidably installed inside the sliding groove. The expansion block 165 is connected to the slider, and the slider is connected to the sliding groove through a connecting spring 166. When the coolant in the first cooling pipe 20 cools down, the expansion block 165 contracts and resets under the action of the connecting spring 166.

[0032] It should be noted that at least one first water inlet 11 is provided on the liquid cooling plate housing 10, and the first water inlet 11 is connected to the water inlet end 21 of the water inlet pipe 15; at least one second drain outlet 13 is provided at the bottom of the liquid cooling plate housing 10, and the second drain outlet 13 is connected to the drain end 22 of the water inlet pipe 15.

[0033] The liquid cooling plate housing 10 has at least one first drain outlet 12, which is connected to the second cooling pipe 40; the bottom of the liquid cooling plate housing 10 has at least one second water inlet 14, which is connected to the second cooling pipe 40.

[0034] This embodiment also discloses an energy storage device, which includes the above-mentioned composite battery liquid cooling plate and a plurality of battery packs 30 disposed on the composite battery liquid cooling plate.

[0035] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cooling pipe, characterized in that, It includes a first cooling pipe (20), on which an installation groove is provided extending along the length direction of the first cooling pipe (20); a second cooling pipe (40) is provided in the installation groove, and the second cooling pipe (40) extends along the length direction of the first cooling pipe in the installation groove; the coolant inside the second cooling pipe (40) flows in the opposite direction to the coolant inside the first cooling pipe (20).

2. The cooling pipe according to claim 1, characterized in that, The mounting slot is located at the lower part of the first cooling pipe.

3. The cooling pipe according to claim 2, characterized in that, The first cooling pipe (20) has an inverted trapezoidal structure; there are two mounting slots, which are respectively located on the waist of the inverted trapezoidal structure.

4. A composite battery liquid cooling plate, characterized in that, The device includes a liquid-cooled plate housing (10) and several cooling components disposed on the liquid-cooled plate housing (10); the cooling components include two symmetrically arranged first cooling pipes (20), and the first cooling pipes (20) have a water inlet end (21) and a cooling end (22). The liquid-cooled plate housing (10) is provided with a water inlet pipe (15), which is connected to the water inlet end (21) of the first cooling pipe (20); the first cooling pipe (20) has at least one mounting groove, and a second cooling pipe (40) is installed in the mounting groove; the coolant inside the second cooling pipe (40) flows in the opposite direction to the coolant inside the first cooling pipe (20).

5. The composite battery liquid cooling plate according to claim 4, characterized in that, A water inlet valve (16) is provided at the connection between the water inlet pipe (15) and the water inlet end (21) of the first cooling pipe (20); the water inlet valve (16) includes a shell (161), a baffle (164) and an expansion block (165); the shell (161) is a trapezoidal structure, the shell (161) has a long side end and a short side end, the long side end of the shell (161) is provided with a third water inlet (162), the short side end of the shell (161) is provided with at least one third drain outlet (163), the third water inlet (162) is connected to the water inlet pipe (15), and the third drain outlet (163) is connected to the water inlet end (21) of the first cooling pipe (20).

6. The composite battery liquid cooling plate according to claim 5, characterized in that, The baffle (164) is disposed on the short side of the outer casing (161). There is a water outlet gap between the baffle (164) and the third drain outlet (163). One side of the baffle (164) is connected to the expansion block (165). A probe (167) is installed on the other side of the baffle (164). The probe (167) extends into the water inlet (21) of the first cooling pipe (20). The expansion block (165) is made of thermally expanding material, and the probe (167) is made of thermally conductive material.

7. The composite battery liquid cooling plate according to claim 6, characterized in that, A groove is provided in the short side of the outer shell (161), and a slider is slidably installed inside the groove. The expansion block (165) is connected to the slider, and the slider is connected to the groove through a connecting spring (166).

8. The composite battery liquid cooling plate according to claim 4, characterized in that, The liquid cooling plate housing (10) is provided with at least one first water inlet (11), which is connected to the water inlet end (21) of the water inlet pipe (15); the bottom of the liquid cooling plate housing (10) is provided with at least one second drain outlet (13), which is connected to the drain end (22) of the water inlet pipe (15).

9. The composite battery liquid cooling plate according to claim 4, characterized in that, The liquid cooling plate housing (10) is provided with at least one first drain outlet (12), which is connected to the second cooling pipe (40); the bottom of the liquid cooling plate housing (10) is provided with at least one second water inlet (14), which is connected to the second cooling pipe (40).

10. An energy storage device, characterized in that, Includes the composite battery liquid cooling plate as described in any one of claims 4-9 and the battery pack (30) disposed on the composite battery liquid cooling plate.

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