Battery pack liquid cooling circulation device

Abstract

The utility model provides a battery pack liquid cooling circulation device. The battery pack liquid cooling circulation device comprises a liquid cooling machine; a battery pack; the communicating pipeline comprises a first pipeline and a second pipeline, and two ends of the first pipeline and the second pipeline are respectively communicated with the battery pack and the liquid cooling machine to achieve the purpose of temperature control of the battery pack; the first pipeline and / or the second pipeline are / is provided with at least one two-way stop valve, and each two-way stop valve comprises a first valve and a second valve detachably connected with the first valve. The first pipeline and the second pipeline can be disconnected from the first valve and the second valve respectively, cooling liquid is sealed in the first pipeline and the second pipeline through the first valve and the second valve respectively, the battery pack and the liquid cooling machine can be separated from the two-way stop valve, and maintenance and carrying of the battery pack liquid cooling circulation device are facilitated.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery pack liquid cooling circulation device. Background Art

[0002] The principle of the immersed battery pack liquid cooling circulation device is to use flowing coolant to completely immerse the battery pack directly. The coolant contacts and flows with the battery surface, takes away the heat of the battery cell during the flow, and dissipates the heat into the air through the temperature control system, ultimately achieving the purpose of temperature control of the battery pack. The liquid cooler and battery pack of the existing battery pack liquid cooling circulation device are connected through a connecting pipe. The liquid cooler, battery pack and connecting pipe are filled with coolant. A one-way stop valve is usually used on the connecting pipe. The three are inconvenient to disassemble, repair and transport at will, which increases the transportation cost, transportation difficulty and maintenance difficulty of the liquid cooler, battery pack and connecting pipe. Utility Model Content

[0003] In view of this, the present application provides a battery pack liquid cooling circulation device, which can improve the technical problems of high transportation cost, great transportation difficulty and great maintenance difficulty of the liquid cooling machine, battery pack and connecting pipes existing in the battery pack liquid cooling circulation device in the related art.

[0004] To solve the above problems, the technical solutions provided by this application are as follows:

[0005] In a first aspect, the present application provides a battery pack liquid cooling circulation device, which is applied to an immersed battery pack, comprising:

[0006] Liquid cooler;

[0007] Battery pack;

[0008] A connecting pipeline, comprising a first pipeline and a second pipeline, wherein two ends of the first pipeline and the second pipeline are connected to the battery pack and the liquid cooler respectively; and

[0009] A plurality of two-way stop valves, wherein at least one of the two-way stop valves is disposed on the first pipeline and / or the second pipeline, wherein the two-way stop valve comprises a first valve and a second valve detachably connected to the first valve.

[0010] In an optional embodiment of the present application, the number of the two-way stop valves is two, and the two two-way stop valves are respectively a first two-way stop valve and a second two-way stop valve, and one of the first two-way stop valve and the second two-way stop valve is arranged on the first pipeline, and the other is arranged on the second pipeline.

[0011] In an optional embodiment of the present application, the first pipeline includes a first sub-pipeline and a second sub-pipeline, two ends of the first sub-pipeline are respectively connected to the liquid cooler and the first valve of the first two-way shut-off valve, and two ends of the second sub-pipeline are respectively connected to the battery pack and the second valve of the first two-way shut-off valve;

[0012] The second pipeline includes a third sub-pipeline and a fourth sub-pipeline, the two ends of the third sub-pipeline are respectively connected to the liquid cooler and the first valve of the second two-way shut-off valve, and the two ends of the fourth sub-pipeline are respectively connected to the battery pack and the second valve of the second two-way shut-off valve.

[0013] In an optional embodiment of the present application, it also includes:

[0014] The filter is disposed between the first valve and the second valve and is communicated with the first valve and the second valve.

[0015] In an optional embodiment of the present application, the first valve and the second valve are respectively detachably connected to the filter.

[0016] In an optional embodiment of the present application, the battery pack is provided with a liquid inlet and a liquid outlet; the two ends of the second sub-pipeline are respectively connected to the liquid inlet and the second valve of the first two-way stop valve, and the two ends of the fourth sub-pipeline are respectively connected to the liquid outlet and the second valve of the second two-way stop valve.

[0017] In an optional embodiment of the present application, the liquid cooler includes a liquid cooling inlet and a liquid cooling outlet, the two ends of the first sub-pipeline are respectively connected to the first valve of the first two-way stop valve and the liquid cooling outlet, and the two ends of the third sub-pipeline are respectively connected to the first valve of the second two-way stop valve and the liquid cooling inlet.

[0018] In an optional embodiment of the present application, it also includes:

[0019] The liquid injection assembly comprises a liquid injection box and a liquid injection pipeline, and two ends of the liquid injection pipeline are respectively connected to the liquid injection box and the liquid cooling machine.

[0020] In an optional embodiment of the present application, the liquid injection component further includes:

[0021] The shut-off valve is arranged on the liquid injection pipeline.

[0022] In an optional embodiment of the present application, a battery pack liquid cooling circulation device further includes:

[0023] A plurality of quick-insert interfaces are respectively arranged at the liquid inlet, the liquid outlet, the liquid cooling inlet, the liquid cooling outlet and the liquid injection port.

[0024] In an optional embodiment of the present application, the connecting pipeline and the injection pipeline are made of nylon.

[0025] The battery pack liquid cooling circulation device provided in the present application includes at least the following beneficial effects: the battery pack liquid cooling circulation device includes a liquid cooler, a battery pack, a connecting pipeline and a two-way stop valve, the liquid cooler and the battery pack are connected through the first pipe and the second pipe, and coolant can circulate in the first pipe, the second pipe, the liquid cooler and the battery pack to achieve the purpose of temperature control of the battery pack, the first pipe and the second pipe are both provided with the two-way stop valve, the two-way stop valve includes a first valve and a second valve detachably connected to the first valve, the first pipe and the second pipe can be disconnected from the first valve and the second valve respectively, the first valve and the second valve seal the coolant in the first pipe and the second pipe respectively, the battery pack and the liquid cooler can be separated from the two-way stop valve, which is convenient for maintenance and transportation of the battery pack liquid cooling circulation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic structural diagram of a battery pack liquid cooling circulation device provided in one embodiment of the present application.

[0028] Figure 2 Another structural schematic diagram of a battery pack liquid cooling circulation device provided in one embodiment of the present application.

[0029] Figure 3 For this application Figure 1 Schematic diagram of the structure of area A in the middle.

[0030] Figure 4 For this application Figure 1 Schematic diagram of the structure of area B in the middle.

[0031] Figure numerals: 10, liquid cooler; 101, liquid cooling inlet; 102, liquid cooling outlet; 103, liquid filling port; 20, battery pack; 201, liquid inlet; 202, liquid outlet; 30, connecting pipeline; 301, first pipeline; 3011, first sub-pipeline; 3012, second sub-pipeline; 302, second pipeline; 3021, third sub-pipeline; 3022, fourth sub-pipeline; 40, two-way stop valve; 401, first two-way stop valve; 402, second two-way stop valve; 40A, first valve; 40B, second valve; 50, filter; 60, liquid filling assembly; 601, liquid filling tank; 602, liquid filling pipeline; 603, stop valve; 70, quick-plug interface. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0033] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] The present application may repeat reference numerals and / or reference letters in different embodiments. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0035] The battery pack liquid cooling circulation device provided in the present application will be described in detail below in conjunction with specific embodiments and drawings.

[0036] See also Figure 1The present application provides a battery pack liquid cooling circulation device, comprising: a liquid cooling machine 10, a battery pack 20, a connecting pipe 30 and a two-way stop valve 40, wherein the liquid cooling machine 10 and the battery pack 20 are connected via the connecting pipe 30, and the liquid cooling machine 10, the battery pack 20 and the connecting pipe 30 are filled with a coolant, and the coolant circulates in the liquid cooling machine 10, the battery pack 20 and the connecting pipe 30.

[0037] Specifically, the battery pack 20 generates heat during operation. When the heat reaches a certain threshold, it is easy to affect the performance of the battery pack. Therefore, coolant needs to flow into the battery pack 20 to absorb the heat generated by the battery pack 20. The coolant takes the heat out of the battery pack 20 and flows into the liquid cooler 10 to achieve temperature control of the battery pack 20.

[0038] Specifically, the liquid cooler 10 includes an air pump and a liquid cooling component (not shown). The air pump is used to drive the circulation of the coolant, and the liquid cooling component is used to convert the temperature of the coolant that absorbs heat, converting the coolant that absorbs heat into coolant at normal temperature, so that it continues to circulate and control the temperature of the battery pack 20.

[0039] Furthermore, the connecting pipeline 30 includes a first pipeline 301 and a second pipeline 302, and coolant circulates in both the first pipeline 301 and the second pipeline 302. The coolant in the first pipeline 301 and the second pipeline 302 flows in opposite directions. In one embodiment, the coolant in the first pipeline 301 flows from the liquid cooler 10 to the battery pack 20, and the coolant in the second pipeline 302 flows from the battery pack 20 to the liquid cooler 10; in another embodiment, the coolant in the first pipeline 301 flows from the battery pack 20 to the liquid cooler 10, and the coolant in the second pipeline 302 flows from the liquid cooler 10 to the battery pack 20, thereby realizing the circulation of the coolant in the liquid cooler 10, the battery pack 20, and the first pipeline 301 and the second pipeline 302. The flow direction of the coolant in the first pipeline 301 and the second pipeline 302 is not limited in this application, and the specific application shall prevail.

[0040] See also Figure 1 and Figure 2In one embodiment of the present application, the number of the two-way stop valves 40 is two, and the two two-way stop valves 40 are respectively a first two-way stop valve 401 and a second two-way stop valve 402. One of the first two-way stop valve 401 and the second two-way stop valve 402 is arranged on the first pipeline 301, and the other is arranged on the second pipeline 302. The first two-way stop valve 401 and the second two-way stop valve 402 can respectively control the flow and stop of the coolant in the corresponding first pipeline 301 and the second pipeline 302.

[0041] Furthermore, there are multiple two-way stop valves 40, and multiple two-way stop valves 40 can be simultaneously provided on the first pipeline 301 and the second pipeline 302. In the embodiment of the present application, there are two two-way stop valves 40, that is, one of the first two-way stop valve 401 and the second two-way stop valve 40 is provided on the first pipeline 301 and the second pipeline 302, that is, one of the first two-way stop valve 401 and the second two-way stop valve 402 is provided on the first pipeline 301, and the other is provided on the second pipeline 302. No specific limitation is made in the present application, which shall be subject to actual application.

[0042] In one embodiment of the present application, the first two-way stop valve 401 and the second two-way stop valve 402 both include a first valve 40A and a second valve 40B detachably connected to the first valve 40A, the first valve 40A and the second valve 40B of the first two-way stop valve 401 are arranged on the first pipeline 301, and the first valve 40A and the second valve 40B of the second two-way stop valve 402 are arranged on the second pipeline 302.

[0043] It can be understood that the first two-way stop valve 401 and the second two-way stop valve 402 include a first state and a second state. When in the first state, the first valve 40A and the second valve 40B are connected, and the coolant in the first pipeline 301 and the second pipeline 302 flows and circulates normally; when in the second state, the first valve 40A and the second valve 40B are disconnected, and the coolant in the first pipeline 301 and the second pipeline 302 is cut off and sealed in the first pipeline 301 and the second pipeline 302 respectively, and the cooling cycle is interrupted.

[0044] Specifically, when there is a need for transportation or maintenance, the first valve 40A and the second valve 40B can be disconnected, and the first pipe 301 and the second pipe 302 are also disconnected from the corresponding first valve 40A and the second valve 40B. In one embodiment, the first valve 40A is, for example, transported or maintained with the liquid cooler 10, and the second valve 40B is transported or maintained with the battery pack 20. The first valve 40A and the second valve 40B respectively seal the coolant in the first pipe 301 and the second pipe 302, thereby reducing the risk of coolant leakage during transportation or maintenance.

[0045] See also Figure 2 and Figure 3 In one embodiment of the present application, the first pipeline 301 includes a first sub-pipeline 3011 and a second sub-pipeline 3012, and the two ends of the first sub-pipeline 3011 are respectively connected to the liquid cooler 10 and the first valve 40A of the first two-way stop valve 401, and the two ends of the second sub-pipeline 3012 are respectively connected to the battery pack 20 and the second valve 40B of the first two-way stop valve 401.

[0046] Specifically, the first valve 40A and the second valve 40B of the first two-way stop valve 401 separate the first pipeline 301 into two sub-pipelines. The first valve 40A closes one end of the first sub-pipeline 3011, and the coolant will not leak from the first sub-pipeline 3011. The second valve 40B closes one end of the second sub-pipeline 3012, and the coolant will not leak from the second sub-pipeline 3012.

[0047] In one embodiment of the present application, the second pipeline 302 includes a third sub-pipeline 3021 and a fourth sub-pipeline 3022, and both ends of the third sub-pipeline 3021 are respectively connected to the liquid cooler 10 and the first valve 40A of the second two-way stop valve 402, and both ends of the fourth sub-pipeline 3022 are respectively connected to the battery pack 20 and the second valve 40B of the second two-way stop valve 402.

[0048] Specifically, the first valve 40A and the second valve 40B of the second two-way stop valve 402 separate the second pipeline 302 into two sub-pipelines. The first valve 40A and the second valve 40B are disconnected, and the first valve 40A can close one end of the third sub-pipeline 3021, so that the coolant will not leak from the third sub-pipeline 3021. The first valve 40A and the second valve 40B are disconnected, and the second valve 40B closes one end of the fourth sub-pipeline 3022, so that the coolant will not leak from the fourth sub-pipeline 3022.

[0049] Furthermore, the two first valves 40A respectively seal one end of the first sub-pipeline 3011 and the third sub-pipeline 3021, the first sub-pipeline 3011, the third sub-pipeline 3021 and the liquid cooler 10 are connected to each other as a whole, the coolant is sealed inside, and when there is a need for transportation, the three can be transported or repaired separately without draining the coolant, which reduces the difficulty of transportation and maintenance. The two second valves 40B respectively seal one end of the second sub-pipeline 3012 and the fourth sub-pipeline 3022, the second sub-pipeline 3012, the fourth sub-pipeline 3022 and the battery pack 20 are connected to each other as a whole, the coolant is sealed inside, and when there is a need for transportation, the three can be transported or repaired separately without draining the coolant, which reduces the difficulty of transportation and maintenance.

[0050] Furthermore, the lengths of the first sub-pipe 3011 and the third sub-pipe 3021 are greater than those of the second sub-pipe 3012 and the fourth sub-pipe 3022. When there is a need for transportation, the longer first sub-pipe 3011 and the third sub-pipe 3021 are transported with the liquid cooler 10, and the shorter second sub-pipe 3012 and the fourth sub-pipe 3022 are transported with the battery pack 20, thereby improving the safety factor of transportation of the battery pack 20.

[0051] See also Figure 2 and Figure 3 In an optional embodiment of the present application, a battery pack liquid cooling circulation device further includes:

[0052] The filter 50 is disposed between the first valve 40A and the second valve 40B, and is communicated with the first valve 40A and the second valve 40B.

[0053] Specifically, the coolant may contain impurities during the production process, and the coolant is prone to produce impurities during the cooling cycle. Therefore, the filter 50 is arranged between the first valve 40A and the second valve 40B, and the filter 50 is configured to filter the impurities in the coolant to reduce the influence of the impurities on the cooling effect and the influence on the safety of the battery pack.

[0054] In an optional embodiment of the present application, the first valve 40A and the second valve 40B are respectively detachably connected to the filter 50 .

[0055] Specifically, the filter 50 is, for example, a filter plate or a filter valve for filtering impurities in the coolant. It is located between the first valve 40A and the second valve 40B to facilitate installation, disassembly or replacement, thereby improving the disassembly efficiency of the filter 50 and the cleaning efficiency of the coolant impurities.

[0056] In another optional embodiment of the present application, the battery pack 20 is provided with a liquid inlet 201 and a liquid outlet 202; the two ends of the second sub-pipeline 3012 are respectively connected to the liquid inlet 201 and the second valve 40B of the first two-way stop valve 401, and the two ends of the fourth sub-pipeline 3022 are respectively connected to the liquid outlet 202 and the second valve 40B of the second two-way stop valve 402.

[0057] Specifically, the coolant flows out of the liquid cooler 10 and enters the first sub-pipe 3011 and the second sub-pipe 3012, and enters the battery pack 20 from the liquid inlet 201, absorbs the heat generated by the battery pack 20, and then flows out from the liquid outlet 202, and enters the fourth sub-pipe 3022 and the third sub-pipe 3021 in turn, and flows into the liquid cooler 10, so as to achieve temperature control of the battery pack 20 and circulation of the coolant.

[0058] See also Figure 1 In another optional embodiment of the present application, the liquid cooling machine 10 includes a liquid cooling inlet 101 and a liquid cooling outlet 102, the two ends of the first sub-pipeline 3011 are respectively connected to the first valve 40A of the first two-way stop valve 401 and the liquid cooling outlet 102, and the two ends of the third sub-pipeline 3021 are respectively connected to the first valve 40A of the second two-way stop valve 402 and the liquid cooling inlet 101.

[0059] Specifically, the coolant flows out from the liquid cooling outlet 102 of the liquid cooler 10 and enters the first sub-pipe 3011 and the second sub-pipe 3012, then enters the battery pack 20 from the liquid inlet 201, absorbs the heat generated by the battery pack 20, and then flows out from the liquid outlet 202 and enters the fourth sub-pipe 3022 and the third sub-pipe 3021, and flows into the liquid cooling inlet 101 of the liquid cooler 10 along the fourth sub-pipe 3022 and the third sub-pipe 3021, thereby achieving temperature control of the battery pack 20 and circulation of the coolant.

[0060] See also Figure 1 and Figure 2 In an optional embodiment of the present application, a battery pack liquid cooling circulation device further includes:

[0061] The liquid injection assembly 60 includes a liquid injection box 601 and a liquid injection pipeline 602 , and two ends of the liquid injection pipeline 602 are connected to the liquid injection box 601 and the liquid cooling machine 10 respectively.

[0062] Specifically, the liquid injection tank 601 is filled with coolant, and the coolant in the liquid injection tank 601 is driven by an air pump to flow into the liquid injection pipeline 602, and then flows into the liquid cooler 10 along the liquid injection pipeline 602 to circulate the coolant, thereby achieving temperature control of the battery pack.

[0063] In an optional embodiment of the present application, a liquid injection port 103 is provided on the liquid cooling machine 10 , and two ends of the liquid injection pipeline 602 are respectively connected to the liquid injection port 103 and the liquid injection tank 601 .

[0064] Specifically, the coolant in the liquid injection tank 601 is driven by the air pump to flow into the liquid injection pipeline 602, flows into the liquid injection port 103 along the liquid injection pipeline 602, and then enters the liquid cooler 10 to circulate the coolant to achieve temperature control of the battery pack.

[0065] See also Figure 4 In an optional embodiment of the present application, the injection assembly 60 further includes:

[0066] The shut-off valve 603 is arranged on the injection pipeline 602 .

[0067] Specifically, the shut-off valve 603 is, for example, a ball valve, but is not limited thereto, and is subject to actual application. The shut-off valve 603 is configured to control the flow or stop of the coolant in the injection pipeline 602. When injection or replenishment is required, the shut-off valve 603 is opened, and when injection or replenishment is not required, or the battery pack liquid cooling circulation device needs to be transported or repaired, the shut-off valve 603 can be closed, and is subject to actual application.

[0068] See also Figure 2-Figure 4 In an optional embodiment of the present application, a battery pack liquid cooling circulation device further includes:

[0069] A plurality of quick-plug connectors 70 are respectively provided at the liquid inlet 201, the liquid outlet 202, the liquid cooling inlet 101, and the liquid cooling outlet 102. The two ends of the first pipe 301 are respectively connected to the liquid inlet 201 and the liquid cooling outlet 102 through the quick-plug connectors 70, the two ends of the second pipe 302 are respectively connected to the liquid outlet 202 and the liquid cooling inlet 101 through the quick-plug connectors 70, and the two ends of the liquid injection pipeline 602 are respectively connected to the liquid injection port 103 and the liquid injection tank 601 through the quick-plug connectors 70.

[0070] In one embodiment, the quick-insert interface 70 is also provided at the liquid injection port 103 .

[0071] Specifically, the battery pack 20 is provided with an internal pipeline (not shown), the first pipeline 301 and the second pipeline 302 are, for example, external pipelines, and the internal pipeline and the external pipeline are connected through the quick-plug interface 70 to achieve the circulation of the coolant. In addition, the quick-plug interface 70 seals the shell of the battery pack 20, meets the anti-leakage requirements of the battery pack 20, ensures that the coolant will not leak from the battery pack 20, and improves the safety performance of the battery pack 20.

[0072] In an optional embodiment of the present application, the connecting pipeline 30 and the injection pipeline 602 are made of nylon, but are not limited thereto.

[0073] In one embodiment, the outer surfaces of the connecting pipeline 30 and the injection pipeline 602 may be coated with a thermal insulation layer to reduce the influence of factors such as the external environment on the temperature of the coolant.

[0074] In one embodiment, the bottom of the liquid cooler 10 is provided with a moving device, such as rollers, for easy transportation and handling.

[0075] The battery pack liquid cooling circulation device provided in the present application includes at least the following working process or principle: the battery pack liquid cooling circulation device includes a liquid cooling machine 10, a battery pack 20, a connecting pipe 30, a two-way stop valve 40, a filter 50, and a quick-plug interface 70. The liquid cooling machine 10 and the battery pack 20 are connected through the first pipe 301 and the second pipe 302. The liquid cooling machine 10, the battery pack 20, and the first pipe 301 and the second pipe 302 are filled with cooling liquid. The cooling liquid circulates in the liquid cooling machine 10, the battery pack 20 and the connecting pipe 30, thereby controlling the temperature of the battery pack 20. The first valve 40A and the second valve 40B of the first two-way stop valve 401 and the second two-way stop valve 402 are detachably connected. When there is a need for transportation, maintenance, or liquid injection, they can be disconnected from the first valve 40A and the second valve 40B. The first pipe 301 and the second pipe 302 are respectively divided into the first sub-pipeline 3011, the second sub-pipeline 3012, the third sub-pipeline 3021, and the fourth sub-pipeline 3022. The first pipe 301, the third sub-pipeline 3021, and the liquid cooler 10 can be transported or repaired separately, and the second sub-pipeline 3012, the fourth sub-pipeline 3022, and the battery pack 20 can be transported or repaired separately, which reduces the difficulty of transportation and maintenance. A filter 50 is provided between the first valve 40A and the second valve 40B. The filter 50 is configured to filter impurities in the coolant to reduce the influence of impurities on the cooling effect and the safety of the battery pack. The filter 50 is detachably disposed between the first valve 40A and the second valve 40B, which facilitates the installation, removal or replacement of the filter 50, and improves the removal efficiency of the filter 50 and the cleaning efficiency of the coolant impurities. The quick-plug interface 70 meets the anti-leakage requirements of the battery pack 20, ensures that the coolant will not leak from the battery pack 20, and improves the safety performance of the battery pack 20.

[0076] In summary, although the present application has been disclosed as above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. A battery pack liquid cooling circulation device, applied to an immersion battery pack, characterized in that: include: Liquid cooler; Battery pack; A connecting pipeline, comprising a first pipeline and a second pipeline, wherein two ends of the first pipeline and the second pipeline are connected to the battery pack and the liquid cooler respectively; and A plurality of two-way stop valves, wherein at least one of the two-way stop valves is disposed on the first pipeline and / or the second pipeline, wherein the two-way stop valve comprises a first valve and a second valve detachably connected to the first valve.

2. The battery pack liquid cooling circulation device according to claim 1, characterized in that: There are two two-way stop valves, which are respectively a first two-way stop valve and a second two-way stop valve. One of the first two-way stop valve and the second two-way stop valve is arranged on the first pipeline, and the other is arranged on the second pipeline.

3. The battery pack liquid cooling circulation device according to claim 2, characterized in that: The first pipeline includes a first sub-pipeline and a second sub-pipeline, two ends of the first sub-pipeline are respectively connected to the liquid cooler and the first valve of the first two-way shut-off valve, and two ends of the second sub-pipeline are respectively connected to the battery pack and the second valve of the first two-way shut-off valve; The second pipeline includes a third sub-pipeline and a fourth sub-pipeline, the two ends of the third sub-pipeline are respectively connected to the liquid cooler and the first valve of the second two-way shut-off valve, and the two ends of the fourth sub-pipeline are respectively connected to the battery pack and the second valve of the second two-way shut-off valve.

4. The battery pack liquid cooling circulation device according to any one of claims 1 to 3, characterized in that: Also includes: The filter is disposed between the first valve and the second valve and is communicated with the first valve and the second valve.

5. The battery pack liquid cooling circulation device according to claim 4, characterized in that: The first valve and the second valve are respectively detachably connected to the filter.

6. The battery pack liquid cooling circulation device according to claim 3, characterized in that: The battery pack is provided with a liquid inlet and a liquid outlet; the two ends of the second sub-pipeline are respectively connected to the liquid inlet and the second valve of the first two-way stop valve, and the two ends of the fourth sub-pipeline are respectively connected to the liquid outlet and the second valve of the second two-way stop valve.

7. The battery pack liquid cooling circulation device according to claim 6, characterized in that: The liquid cooler includes a liquid cooling inlet and a liquid cooling outlet, the two ends of the first sub-pipeline are respectively connected to the first valve of the first two-way stop valve and the liquid cooling outlet, and the two ends of the third sub-pipeline are respectively connected to the first valve of the second two-way stop valve and the liquid cooling inlet.

8. The battery pack liquid cooling circulation device according to claim 4, characterized in that: Also includes: The liquid injection assembly comprises a liquid injection box and a liquid injection pipeline, and two ends of the liquid injection pipeline are respectively connected to the liquid injection box and the liquid cooling machine.

9. The battery pack liquid cooling circulation device according to claim 8, characterized in that: The injection assembly also includes: The shut-off valve is arranged on the liquid injection pipeline.

10. The battery pack liquid cooling circulation device according to claim 7, characterized in that: Also includes: A plurality of quick-insert interfaces are respectively arranged at the liquid inlet, the liquid outlet, the liquid cooling inlet and the liquid cooling outlet.

11. The battery pack liquid cooling circulation device according to claim 8, characterized in that: The connecting pipeline and the injection pipeline are made of nylon.

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