Battery liquid cooling structure, battery assembly and energy storage device

Abstract

The utility model relates to the technical field of battery production, in particular to a battery liquid cooling structure, a battery assembly and an energy storage device.The battery liquid cooling structure comprises a liquid cooling plate, a first connector, a second connector and a sealing sleeve, and the liquid cooling plate comprises a cooling plate body and a water nozzle connected with the cooling plate body; the first joint sleeves the water nozzle and is hermetically communicated with the water nozzle, and the first end of the first joint is hermetically connected with the cold plate body; the second joint is tightly connected and communicated with the first joint; and the sealing sleeve is sleeved on the first joint and the second joint and is tightly connected with the first joint and the second joint respectively. According to the battery liquid cooling structure, on the basis that the first connector is in sealed communication with the water nozzle and the second connector, the first connector is in sealed connection with the cold plate body, and the sealing sleeve is in sealed connection with the first connector and the second connector, so that secondary sealing between the first connector and the liquid cooling plate and between the first connector and the second connector is realized, and the liquid leakage risk is reduced; and the use safety of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and in particular to a battery liquid cooling structure, a battery assembly and an energy storage device. Background Art

[0002] As a means of transportation that uses clean energy, new energy vehicles have received more and more attention. In order to improve the battery life and safety of electric vehicles, thermal management measures such as active heating and cooling of the battery are required to keep it working at a suitable temperature. Among them, liquid cooling plates are currently a widely used method for heating and cooling batteries.

[0003] The liquid cooling plate is usually connected to the automotive cooling system with a battery replacement function through a quick-plug connector. In the prior art, the liquid cooling plate includes a cold plate body with a cooling channel and a water nozzle connected to the cooling channel. The quick-change water connector includes a close-fitting male connector and a female connector, wherein the female connector is closely connected to the water nozzle through a clamp, and the male connector is connected to the pipeline at the vehicle end to achieve a quick connection between the liquid cooling plate and the entire vehicle. However, the clamp fixation is only applicable to the connection between the female connector and the water nozzle with a rubber tube, which limits the scope of application, and the installation steps are complicated and the assembly time is long. At the same time, there is a risk of leakage at the sealing of the female connector and the water nozzle, and the male connector and the female connector.

[0004] In view of this, this application is specially filed. Utility Model Content

[0005] The present application provides a battery liquid cooling structure, a battery assembly and an energy storage device, which are used to solve the problem of how to improve the sealing of the battery liquid cooling structure to ensure the safety of battery use.

[0006] On the one hand, the present application provides a battery liquid cooling structure, comprising:

[0007] A liquid cooling plate, the liquid cooling plate comprising a cooling plate body and a water nozzle connected to the cooling plate body, a cooling channel is formed inside the cooling plate body, and the cooling channel is connected to the water nozzle;

[0008] a first joint, wherein the first joint is sleeved on the water nozzle and is in sealed communication with the water nozzle, and a first end of the first joint is in close contact with the cold plate body;

[0009] a second connector, wherein a first end of the second connector is in close contact with and communicated with a second end of the first connector, and a second end of the second connector is in close contact with and communicated with an end of the energy storage device; and

[0010] A sealing sleeve is provided on the first joint and the second joint and is in close contact with the first joint and the second joint respectively.

[0011] In some embodiments, the sealing sleeve is formed with through holes extending through both ends of the sealing sleeve along its axial direction, and the first joint and the second joint pass through the through holes and are sleeved with the sealing sleeve respectively;

[0012] A first sealing component is disposed on an outer surface of the first joint, and a second sealing component is disposed on an outer surface of the second joint. The first sealing component and the second sealing component are respectively interference-fitted with the inner wall of the through hole.

[0013] In some embodiments, the outer surface of the first joint is provided with a limiting tooth extending outwardly and protruding along the radial direction of the first joint, and the end of the limiting tooth abuts against the inner wall of the through hole.

[0014] In some embodiments, the limiting teeth and the second sealing member are relatively arranged on two sides of the first sealing member along the axis of the sealing sleeve.

[0015] In some embodiments, the outer surface of the first joint has a step portion extending outwardly and protruding along the radial direction of the first joint, and the limiting teeth and the first sealing member are respectively arranged on the step portion.

[0016] In some embodiments, the second joint is sleeved on the first joint, and the step portion is in limited abutment with the first end of the second joint.

[0017] In some embodiments, the through hole has at least a first hole segment, a second hole segment and a third hole segment that are coaxially arranged, the end of the limiting tooth abuts against the inner wall of the first hole segment, the first sealing member and the first hole segment, the second sealing member and the inner wall of the second hole segment are interference fit, and the radial dimension of the first hole segment is larger than the radial dimension of the second hole segment.

[0018] In some embodiments, a receiving groove is disposed at the first end of the first joint, and a third sealing member is disposed between the cold plate body and the receiving groove to seal the cold plate body and the first joint.

[0019] On the other hand, the present application also provides a battery assembly, including the battery liquid cooling structure described above.

[0020] On the other hand, the present application also provides an energy storage device, comprising the battery assembly described above.

[0021] After adopting the above technical solution, the present application has the following beneficial effects compared with the prior art.

[0022] 1. The battery liquid cooling structure in the present application is based on the first joint being sleeved on the water nozzle and sealed and connected to the water nozzle, and the first joint is further sealed and connected to the cold plate body, thereby realizing secondary sealing of the first joint and the liquid cooling plate, reducing the risk of leakage at the connection between the first joint and the liquid cooling plate, thereby blocking the leakage risk from the source and improving the safety of battery use.

[0023] 2. The battery liquid cooling structure in the present application, on the basis of the first joint and the second joint being closely connected and connected, the sealing sleeve is sleeved on the first joint and the second joint and further sealed and connected with the two, thereby realizing secondary sealing of the first joint and the second joint, reducing the risk of leakage at the connection between the first joint and the second joint, and has a simple structure, low production cost, easy assembly and high reliability.

[0024] 3. The battery assembly in the present application includes the battery liquid cooling structure in the present application, and therefore also includes all the above-mentioned advantages of the battery liquid cooling structure.

[0025] 4. The energy storage device in the present application includes the battery assembly in the present application, and therefore also includes all the above-mentioned advantages of the battery assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a battery liquid cooling structure in an embodiment of the present application;

[0027] Figure 2 yes Figure 1 Sectional view along AA direction;

[0028] Figure 3 is an exploded view of a battery liquid cooling structure in an embodiment of the present application;

[0029] Figure 4 This is a schematic structural diagram of a sealing sleeve in an embodiment of the present application;

[0030] Figure 5 yes Figure 1 Cross-sectional view along the BB direction;

[0031] Figure 6 It is a structural schematic diagram of a first joint in an embodiment of the present application.

[0032] In the figure: 100, liquid cooling plate; 110, cooling plate body; 120, water nozzle; 200, first joint; 210, receiving groove; 220, limiting tooth; 230, step portion; 240, first flow channel; 241, assembly flow channel section; 242, guide flow channel section; 300, second joint; 400, sealing sleeve; 410, through hole; 411, first hole section; 412, second hole section; 413, gap hole section; 414, assembly hole section; 415, third hole section; 500, first sealing member; 600, second sealing member; 700, third sealing member; 800, fourth sealing member; 900, clamp. DETAILED DESCRIPTION

[0033] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0034] The present application provides a battery liquid cooling structure. For details of the battery liquid cooling structure, please refer to Figures 1 to 6 , which includes a liquid cooling plate 100, a first joint 200, a second joint 300 and a sealing sleeve 400, wherein the liquid cooling plate 100 includes a cold plate body 110 and a water nozzle 120 connected to the cold plate body 110, a cooling channel is formed inside the cold plate body 110, and the cooling channel is connected to the water nozzle 120; the first joint 200 is sleeved on the water nozzle 120 and is sealed and connected to the water nozzle 120, and the first end of the first joint 200 is in close contact with the cold plate body 110; the first end of the second joint 300 is in close contact with and connected to the second end of the first joint 200, and the second end of the second joint 300 is in close contact with and connected to the end of the energy storage device; the sealing sleeve 400 is sleeved on the first joint 200 and the second joint 300 and is in close contact with the first joint 200 and the second joint 300 respectively.

[0035] According to the battery liquid cooling structure of the application, on the basis that the first joint 200 is sleeved on the water nozzle 120 and is sealed and connected with the water nozzle 120, the first joint 200 is further sealed and connected with the cold plate body 110, so as to realize the secondary sealing of the first joint 200 and the liquid cooling plate 100, reduce the risk of leakage at the connection between the first joint 200 and the liquid cooling plate 100, and thus block the leakage hidden danger from the source, and on the basis that the first joint 200 and the second joint 300 are in close contact and connected, the sealing sleeve 400 is sleeved on the first joint 200 and the second joint 300 and is further sealed and connected with the two, so as to realize the secondary sealing of the first joint 200 and the second joint 300, reduce the risk of leakage at the connection between the first joint 200 and the second joint 300, and the structure is simple, the production cost is low, the assembly is convenient, and the reliability is high.

[0036] The energy storage device can be a device with a battery replacement function such as a vehicle or an operating machine. In order to realize the connection between the liquid cooling plate 100 and the energy storage device end at the battery end, the battery end and the energy storage device end are connected through a quick-change water connector, such as Figures 1 to 3 As shown, the first connector 200 is connected to the battery end through the liquid cooling plate 100, and the second connector 300 is connected to the cooling system of the energy storage device end. The first connector 200 and the second connector 300 define a quick-change water connector connecting the battery end and the energy storage device end. Specifically, a flow channel for liquid flow is formed inside the quick-change water connector.

[0037] like Figure 2 , Figure 4 and Figure 5 As shown, the sealing sleeve 400 is internally formed with through holes 410 passing through both ends along its axial direction, and the first joint 200 and the second joint 300 are respectively passed through the through holes 410 and connected with the sealing sleeve 400. The connection method is simple, and the first joint 200 and the second joint 300 are easy to assemble and disassemble with the sealing sleeve 400, which is not only beneficial to improving the assembly efficiency of the battery liquid cooling structure, but also beneficial to the maintenance and replacement of parts, thereby extending the service life of the battery liquid cooling structure.

[0038] like Figure 2 and Figure 3 As shown, a first sealing member 500 is provided on the outer surface of the first joint 200, and a second sealing member 600 is provided on the outer surface of the second joint 300. The first sealing member 500 and the second sealing member 600 are respectively interference fit with the inner wall of the through hole 410. Multiple interference fit connections are adopted to tightly connect the first joint 200 and the sealing sleeve 400, and the second joint 300 and the sealing sleeve 400 together. The connection is reliable, which can not only withstand the liquid pressure in the flow channel, but also prevent the liquid in the flow channel from leaking, thereby ensuring the normal operation of the battery and improving its safety in use.

[0039] like Figure 2 and Figure 3 As shown, the first sealing component 500 and the second sealing component 600 are both constructed as sealing rings and are arranged at intervals along the circumference of the sealing sleeve 400, wherein the first sealing component 500 is sleeved on the outer peripheral side of the first joint 200, and the inner wall of the first sealing component 500 is interference fit with the outer wall of the first joint 200, so that the first sealing component 500 is clamped and fixed between the first joint 200 and the sealing sleeve 400, further enhancing the sealing of the connection between the first joint 200 and the sealing sleeve 400, and the second sealing component 600 is sleeved on the outer peripheral side of the second joint 300, and the inner wall of the second sealing component 600 is interference fit with the outer wall of the second joint 300, so that the second sealing component 600 is clamped and fixed between the second joint 300 and the sealing sleeve 400, further enhancing the sealing of the connection between the second joint 300 and the sealing sleeve 400.

[0040] like Figure 2 and Figure 3 As shown, the second end of the first joint 200 is inserted into the second joint 300, the outer wall of the first joint 200 is sealed and fitted with the inner wall of the second joint 300, and the second sealing component 600 is sleeved on the outer peripheral side of the sealing fit between the second joint 300 and the first joint 200. When the second sealing component 600 is clamped and fixed between the second joint 300 and the sealing sleeve 400, the second sealing component 600 presses the second joint 300 along the circumference of the second joint 300 to make the first joint 200 and the second joint 300 press and fit, which helps to reduce the gap between the outer wall of the first joint 200 and the inner wall of the second joint 300, and prevents the liquid in the flow channel from overflowing through the gap between the outer wall of the first joint 200 and the inner wall of the second joint 300.

[0041] like Figure 2 , Figure 3 and Figure 6 As shown, the outer surface of the first connector 200 is provided with a limiting tooth 220 which protrudes outward along the radial direction of the first connector 200, and the end of the limiting tooth 220 abuts against the inner wall of the through hole 410, so that an interference sealing structure is formed between the limiting tooth 220 and the inner wall of the through hole 410. On the basis of the interference fit between the first sealing component 500 and the inner wall of the through hole 410, the limiting tooth 220 and the sealing sleeve 400 are sealed and connected. Therefore, the first connector 200 is detachably connected to the sealing sleeve 400 through the double sealing structure, thereby further improving the sealing performance of the battery liquid cooling structure.

[0042] like Figure 2 and Figure 3 As shown, the limiting teeth 220 and the second sealing component 600 are relatively arranged on both sides of the first sealing component 500 along the axis of the sealing sleeve 400, and an interference sealing structure is formed between the limiting teeth 220, the first sealing component 500 and the second sealing component 600 and the inner wall of the through hole 410 respectively, so that the quick-change water connector is connected to the sealing sleeve 400 through a triple sealing structure, thereby ensuring the sealing of the entire battery liquid cooling structure and avoiding the risk of leakage.

[0043] like Figure 2 , Figure 3 and Figure 6 As shown, the outer surface of the first joint 200 has a step portion 230 protruding outward along the radial direction of the first joint 200, and the limiting teeth 220 and the first sealing component 500 are respectively arranged on the step portion 230. Since the step portion 230 protrudes radially outward, the limiting teeth 220 and the first sealing component 500 can be pressed and fitted with the inner wall of the through hole 410. There is a certain gap between the outer wall of the second joint 300 and the inner wall of the through hole 410, so as to maintain the stability of the flow channel and reserve a certain expansion space.

[0044] like Figure 2 , Figure 3 and Figure 6 As shown, the second joint 300 is sleeved on the first joint 200, and the step portion 230 is limitedly abutted against the first end of the second joint 300. The abutment between the second joint 300 and the step portion 230 can limit the second joint 300, which can ensure that the first joint 200 and the second joint 300 are assembled in place, and can also ensure that the abutment between the second joint 300 and the step portion 230 is sealed and fitted, thereby preventing leakage of the first joint 200 and the second joint 300.

[0045] like Figure 2 , Figure 4 and Figure 5 As shown, the through hole 410 has at least a first hole section 411, a second hole section 412 and a third hole section 415 which are coaxially arranged, the end of the limiting tooth 220 abuts against the inner wall of the first hole section 411, the first sealing member 500 and the inner wall of the first hole section 411, the second sealing member 600 and the second hole section 412 are interference fit, the radial dimension of the first hole section 411 is greater than the radial dimension of the second hole section 412, the limiting tooth 220 radially protrudes from the first sealing member 500, the sealing sleeve 400 is sequentially connected to the second sealing member 600 and the first sealing member 500, and then abuts against the limiting tooth 220 to ensure that the sealing sleeve 400 is assembled in place with the first joint 200 and the second joint 300, thereby ensuring the reliability of the triple sealing structure.

[0046] like Figure 2 , Figure 4 and Figure 5 As shown, the through hole 410 also has a gap hole section 413 and an assembly hole section 414 which are coaxially arranged in sequence, wherein the radial dimension of the gap hole section 413 is greater than the radial dimension of the assembly hole section 414, and there is a certain gap between the outer wall of the second joint 300 and the inner wall of the gap hole section 413, so as to ensure that the quick-change water joint has a certain expansion space, which is beneficial to prolonging its service life, and the outer wall of the second joint 300 is sealed and fitted with the assembly hole section 414, so as to ensure the stable connection between the first joint 200 and the second joint 300.

[0047] like Figure 2 , Figure 4 and Figure 5 As shown, the first hole segment 411, the second hole segment 412, the gap hole segment 413, the assembly hole segment 414 and the third hole segment 415 are coaxially arranged in sequence, the radial dimension of the second hole segment 412 is larger than the dimension of the gap hole segment 413, the step portion 230 is inserted into the gap hole segment 413 and seals with the inner wall of the gap hole segment 413 to ensure the sealing of the connection between the first joint 200 and the sealing sleeve 400.

[0048] like Figure 2 and Figure 3 As shown, the thickness of the second sealing component 600 is greater than that of the first sealing component 500, the outer diameter of the second sealing component 600 is greater than the outer diameter of the first sealing component 500, and the radial dimension of the third hole segment 415 is less than or equal to the radial dimension of the second hole segment 412, so that the second sealing component 600 is tightly mounted on the outer peripheral side of the sealing fit between the second joint 300 and the first joint 200, reducing the risk of leakage at the connection between the first joint 200 and the second joint 300.

[0049] like Figure 2 and Figure 6 As shown, a receiving groove 210 is provided at the first end of the first joint 200, and a third sealing member 700 is provided between the cold plate body 110 and the receiving groove, so that the cold plate body 110 is sealed and connected with the first joint 200. On the basis of the sealed communication between the first joint 200 and the water nozzle 120, the first joint 200 is further sealed and connected with the cold plate body 110, so as to realize secondary sealing of the first joint 200 and the liquid cooling plate 100, block the leakage risk from the source, and improve the safety of battery use.

[0050] like Figure 2 As shown, a clamp 900 is sleeved on the outer peripheral side of the water nozzle 120, and the clamp 900 is arranged between the inner wall of the first joint 200 and the outer wall of the water nozzle 120, so as to realize a sealed connection between the first joint 200 and the water nozzle 120, ensure the reliability of the connection, avoid leakage due to unreliable connection, and thus ensure the safety of the battery liquid cooling structure.

[0051] like Figure 2 As shown, a fourth sealing component 800 is also provided on the outer peripheral side of the water nozzle 120. The fourth sealing component 800 is arranged between the inner wall of the first joint 200 and the outer wall of the water nozzle 120, so as to realize a secondary sealing connection between the first joint 200 and the water nozzle 120, further improve the reliability of the connection between the first joint 200 and the water nozzle 120, and prevent leakage at the connection between the first joint 200 and the water nozzle 120.

[0052] like Figure 2 As shown, the clamp 900 is arranged between the first end of the first joint 200 and the fourth sealing member 800, and at least two fourth sealing members 800 are coaxially arranged in sequence to ensure better sealing of the connection between the first joint 200 and the faucet 120.

[0053] like Figure 2 , Figure 3 and Figure 6As shown, the third sealing component 700 and the fourth sealing component 800 are both constructed as sealing rings, wherein the accommodating groove 210 is an annular groove extending along the circumference of the first joint 200, and the third sealing member is an annular sealing ring adapted to the contour of the annular groove, and the annular sealing ring is arranged between the cold plate body 110 and the first joint 200. The annular sealing ring has good elasticity and compressibility and is not easy to deform, so that it has good sealing performance, and the fourth sealing component 800 is sleeved on the outer peripheral side of the faucet 120, and the inner wall of the fourth sealing component 800 is interference fit with the outer wall of the faucet 120, so that the fourth sealing component 800 is clamped and fixed between the first joint 200 and the faucet 120, further enhancing the sealing of the connection between the first joint 200 and the sealing sleeve 400.

[0054] like Figure 2 As shown, a first flow channel 240 is formed inside the first joint 200, wherein the first flow channel 240 includes an assembly flow channel section 241 and a guide flow channel section 242 which are connected in sequence, the radial dimension of the assembly flow channel section 241 is larger than the radial dimension of the guide flow channel section 242, and the outer diameter dimension of the water nozzle 120 is larger than the radial dimension of the guide flow channel section 242, so that the water nozzle 120 is inserted into the assembly flow channel section 241 and abuts against the inner wall of the assembly flow channel section 241 to ensure that the water nozzle 120 is installed in place, thereby improving the assembly efficiency of the battery liquid cooling structure.

[0055] The following describes the assembly and disassembly process of the installation structure of the battery liquid cooling structure according to the embodiment of the present application with reference to the accompanying drawings.

[0056] like Figure 2 and Figure 3 As shown, the second joint 300 is sleeved on the outer peripheral side of the first joint 200 through the second end of the first joint 200, and the first end of the second joint 300 is limitedly abutted against the step portion 230; the first sealing component 500 is correspondingly installed in the second hole section 412, and the second sealing component 600 is correspondingly installed in the third hole section 415, and the sealing sleeve 400 passes through the second joint 300 and the first joint 200 in sequence, and is closely connected with the first joint 200 through the first sealing component 500, and the second sealing component 600 is closely connected with the second joint 300, and then the sealing sleeve 400 is moved to be closely connected with the limiting tooth 220, thereby completing the assembly of the quick-change water joint.

[0057] like Figure 2 and Figure 3 As shown, the clamp 900 and the fourth sealing component 800 are sequentially sleeved on the water nozzle 120, the third sealing component 700 is installed in the receiving groove 210, and then the water nozzle 120 is inserted into the first joint 200, and is closely connected with the first joint 200 through the clamp 900 and the fourth sealing component 800, and the cold plate body 110 is closely connected with the first joint 200 through the third sealing component 700, so that the liquid cooling plate 100 and the quick-change water joint are assembled into one, completing the assembly of the battery liquid cooling structure.

[0058] A battery assembly is also provided in an embodiment of the present application, including the battery liquid cooling structure in the above embodiment, which also includes all the advantages of the battery liquid cooling structure, which will not be repeated here.

[0059] An energy storage device is also provided in an embodiment of the present application. The energy storage device may be a device with a battery replacement function such as a vehicle or an operating machine. The device includes the battery assembly in the above embodiment, which also includes all the advantages of the battery assembly and will not be described in detail here.

[0060] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0064] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery liquid cooling structure, characterized in that: include: A liquid cooling plate, the liquid cooling plate comprising a cooling plate body and a water nozzle connected to the cooling plate body, a cooling channel is formed inside the cooling plate body, and the cooling channel is connected to the water nozzle; a first joint, wherein the first joint is sleeved on the water nozzle and is in sealed communication with the water nozzle, and a first end of the first joint is in close contact with the cold plate body; a second connector, wherein a first end of the second connector is in close contact with and communicated with a second end of the first connector, and a second end of the second connector is in close contact with and communicated with an end of the energy storage device; and A sealing sleeve is provided on the first joint and the second joint and is in close contact with the first joint and the second joint respectively.

2. The battery liquid cooling structure according to claim 1, characterized in that: The sealing sleeve is formed with through holes extending through both ends along the axial direction thereof, and the first joint and the second joint pass through the through holes and are sleeved with the sealing sleeve respectively; A first sealing component is disposed on an outer surface of the first joint, and a second sealing component is disposed on an outer surface of the second joint. The first sealing component and the second sealing component are respectively interference-fitted with the inner wall of the through hole.

3. The battery liquid cooling structure according to claim 2, characterized in that: The outer surface of the first joint is provided with a limiting tooth extending outwardly and protruding along the radial direction of the first joint, and the end of the limiting tooth abuts against the inner wall of the through hole.

4. The battery liquid cooling structure according to claim 3, characterized in that: The limiting teeth and the second sealing member are relatively arranged on two sides of the first sealing member along the axis of the sealing sleeve.

5. The battery liquid cooling structure according to claim 4, characterized in that: The outer surface of the first joint has a step portion extending outwardly and protruding along the radial direction of the first joint, and the limiting teeth and the first sealing component are respectively arranged on the step portion.

6. The battery liquid cooling structure according to claim 5, characterized in that: The second joint is sleeved on the first joint, and the step portion is in limited contact with the first end of the second joint.

7. The battery liquid cooling structure according to claim 4, characterized in that: The through hole has at least a first hole section, a second hole section and a third hole section which are coaxially arranged, the end of the limiting tooth abuts against the inner wall of the first hole section, the first sealing component and the first hole section, the second sealing component and the inner wall of the second hole section are interference fit, and the radial dimension of the first hole section is greater than the radial dimension of the second hole section.

8. The battery liquid cooling structure according to any one of claims 1 to 7, characterized in that: A receiving groove is provided at the first end of the first joint, and a third sealing member is provided between the cold plate body and the receiving groove so as to seal the cold plate body and the first joint.

9. A battery assembly, characterized in that: The invention comprises a battery liquid cooling structure as claimed in any one of claims 1 to 8.

10. An energy storage device, characterized in that: Comprising the battery assembly as claimed in claim 9.

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