Liquid cooling device and battery pack

Abstract

The utility model relates to the technical field of energy storage equipment, in particular to a liquid cooling device and a battery pack, and the liquid cooling device comprises a plurality of liquid cooling plates, a plurality of metal pipes and a plurality of connecting pieces. Each metal pipe is used for communicating two liquid cooling plates, and the end parts of the metal pipes are hermetically inserted into the communicating ports of the liquid cooling plates. The connecting piece is arranged at the butt joint position of the metal pipe and the liquid cooling plate, the metal pipe is connected to the connecting piece, the connecting piece is connected to the liquid cooling plate, the distance between the connecting piece and the liquid cooling plate can be adjusted, and the depth of the metal pipe inserted into the communicating opening changes along with changes of the distance between the connecting piece and the liquid cooling plate. The battery pack comprises a battery box and the liquid cooling device, wherein the liquid cooling device is arranged in the battery box. The battery pack can meet the requirement for high bursting pressure resistance and can absorb assembly tolerance.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage equipment technical field especially, relates to a liquid cooling device and battery pack. BACKGROUND

[0002] Battery pack needs to configure liquid cooling device to regulate and control own temperature, guarantee to be in stable working temperature. The conventional nylon pipeline material hardness is not enough, cannot satisfy the high blast pressure resistance demand of direct cooling, and although the pipeline of metal material can satisfy the high blast pressure resistance demand, but the tolerance of pipeline assembly is difficult to absorb. UTILITY MODEL CONTENTS

[0003] One purpose of the utility model lies in: provide a kind of liquid cooling device, can satisfy high blast pressure resistance demand, and can absorb assembly tolerance.

[0004] To achieve this purpose, the utility model adopts the following technical scheme:

[0005] Provide a kind of liquid cooling device, comprising:

[0006] Multiple liquid cooling plates;

[0007] Multiple metal pipes, each metal pipe is used to communicate two liquid cooling plates, and the end of the metal pipe is sealingly inserted into the communication port of the liquid cooling plate;

[0008] Multiple connecting pieces, the connecting piece is arranged at the butt joint of the metal pipe and the liquid cooling plate, the metal pipe is connected to the connecting piece, the connecting piece is connected to the liquid cooling plate, and the distance between the connecting piece and the liquid cooling plate is adjustable, and the depth of the metal pipe inserted into the communication port changes with the distance between the connecting piece and the liquid cooling plate.

[0009] Optionally, it further includes an adjusting rod, the connecting piece is throughly provided with a first through hole, the liquid cooling plate is provided with a threaded hole, the adjusting rod has an external thread, and the adjusting rod is screwed to the threaded hole through the first through hole.

[0010] Optionally, the connecting piece is provided with a second through hole, the metal pipe is inserted into the communication port through the second through hole, the outer wall of the metal pipe is provided with a protruding portion, the second through hole has a step surface, and the step surface abuts against the end surface of the protruding portion away from the communication port, so that the connecting piece can limit the movement of the metal pipe towards the direction away from the communication port.

[0011] Optionally, it further includes a sealing ring, the sealing ring is sleeved on the metal pipe and clamped between the metal pipe and the inner wall of the communication port, and the sealing ring is in interference fit with the communication port.

[0012] Optionally, the metal pipe is provided with a limiting groove, and the sealing ring is located in the limiting groove.

[0013] Optionally, the connecting piece comprises a first connecting piece, two second through holes are formed in the first connecting piece, two metal pipes pass through the two second through holes respectively and are inserted into two communication openings of the liquid cooling plate, at least one of the two second through holes of the first connecting piece has a notch, and the notch is formed along a radial direction of the second through hole.

[0014] Optionally, a cross section of the liquid cooling plate along a first plane is wavy, the first plane is parallel to a length direction of the liquid cooling plate, and the first plane is perpendicular to a width direction of the liquid cooling plate.

[0015] Optionally, a plurality of liquid cooling plates are sequentially arranged along a width direction of the liquid cooling plate, and the plurality of liquid cooling plates are connected in series and then connected in parallel through the metal pipes.

[0016] Optionally, the battery pack further comprises a wall penetration connector connected to the battery box, and the wall penetration connector is arranged at a third through hole of the battery box.

[0017] Another purpose of the utility model is to provide a battery pack which can meet the requirement of high blast pressure resistance and can absorb assembly tolerance.

[0018] To achieve the purpose, the utility model adopts the following technical scheme.

[0019] The utility model provides a battery pack which comprises a battery box and the above-mentioned liquid cooling device, and the liquid cooling device is arranged in the battery box.

[0020] The utility model has the advantages of:

[0021] The utility model provides a liquid cooling device which comprises a plurality of liquid cooling plates, a plurality of metal pipes and a plurality of connecting pieces. Each metal pipe is used for connecting two liquid cooling plates, and the end of the metal pipe is sealingly inserted into a communication opening of the liquid cooling plate. The connecting piece is arranged at the joint of the metal pipe and the liquid cooling plate, the metal pipe is connected to the connecting piece, the connecting piece is connected to the liquid cooling plate, the distance between the connecting piece and the liquid cooling plate can be adjusted, and the depth of the metal pipe inserted into the communication opening changes with the distance between the connecting piece and the liquid cooling plate. The metal pipe has high structural strength and can meet the requirement of high blast pressure resistance of direct cooling, and the depth of the metal pipe inserted into the communication opening is adjusted by adjusting the distance between the connecting piece and the liquid cooling plate, so that the assembly tolerance of the metal pipe can be absorbed along the insertion depth direction of the communication opening.

[0022] The utility model further provides a battery pack which comprises a battery box and the above-mentioned liquid cooling device, and the liquid cooling device is arranged in the battery box. The battery pack can meet the requirement of high blast pressure resistance and can absorb assembly tolerance. Attached Figure Description

[0023] Figure 1 This is a first-view structural schematic diagram of the liquid cooling device provided in this embodiment of the present invention;

[0024] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0025] Figure 3 This is a second-view structural schematic diagram of the liquid cooling device provided in this embodiment of the present invention;

[0026] Figure 4 yes Figure 3 Enlarged view of point B in the middle;

[0027] Figure 5 This is a partial cross-sectional view of the liquid cooling device (including the first connector) provided in an embodiment of the present utility model;

[0028] Figure 6 This is a partial cross-sectional view of the liquid cooling device (including the second connector) provided in an embodiment of the present utility model;

[0029] Figure 7 This is a third-view structural schematic diagram of the liquid cooling device provided in this embodiment of the utility model.

[0030] In the picture:

[0031] 1. Liquid cooling plate; 11. Internal flow channels;

[0032] 2. Metal tube; 21. Protrusion; 22. Limiting groove;

[0033] 3. Connector; 31. First connector; 311. First through hole; 312. Stepped surface; 313. Notch; 32. Second connector;

[0034] 4. Adjusting rod; 5. Sealing ring; 6. Through-wall connector. Detailed Implementation

[0035] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the drawings, not all of them.

[0036] In the description of the utility model, it needs to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the communication。For ordinary skilled in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0037] In the utility model, unless another explicit provision and limitation, first feature is "on" or "under" second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but are in contact through another feature between them.And, first feature is "on", "above" and "on" second feature includes that first feature is directly above and obliquely above second feature, or just indicates that the horizontal height of first feature is higher than that of second feature.First feature is "under", "below" and "under" second feature includes that first feature is directly below and obliquely below second feature, or just indicates that the horizontal height of first feature is less than that of second feature.

[0038] The battery pack needs to be configured with a liquid cooling device to regulate its temperature and ensure stable working temperature.The liquid cooling device includes a pipeline, and the conventional nylon pipeline material hardness is not enough to meet the high burst pressure requirement of direct cooling, and although the pipeline made of metal material can meet the high burst pressure requirement, the tolerance during pipeline assembly is difficult to absorb.

[0039] Therefore, the embodiment provides a liquid cooling device to solve the above problems. Figures 1-7 As shown in the figure, the liquid cooling device of the embodiment includes a plurality of liquid cooling plates 1, a plurality of metal pipes 2 and a plurality of connecting pieces 3.Each metal pipe 2 is used to communicate two liquid cooling plates 1, and the end of the metal pipe 2 is sealingly inserted into the communication port of the liquid cooling plate 1.The connecting piece 3 is arranged at the abutting position of the metal pipe 2 and the liquid cooling plate 1, the metal pipe 2 is connected to the connecting piece 3, the connecting piece 3 is connected to the liquid cooling plate 1, and the distance between the connecting piece 3 and the liquid cooling plate 1 is adjustable, and the depth of the metal pipe 2 inserted into the communication port changes with the distance between the connecting piece 3 and the liquid cooling plate 1.

[0040] The metal pipe 2 has high structural strength and can meet the high burst pressure requirement of direct cooling, and by adjusting the distance between the connecting piece 3 and the liquid cooling plate 1 to adjust the depth of the metal pipe 2 inserted into the communication port, the assembly tolerance of the metal pipe 2 can be absorbed along the insertion depth direction of the communication port.The liquid cooling device of the embodiment has a burst resistance of 10MPa.

[0041] Optionally, the liquid cooling plate 1 is wavy along the cross section of the first plane, the first plane is parallel to the length direction of the liquid cooling plate 1, and the first plane is perpendicular to the width direction of the liquid cooling plate 1. The wavy groove of the wavy shape can place the cylindrical battery cell and can fit the side wall of the cylindrical battery cell, increase the contact area, and thus improve the heat exchange efficiency. Optionally, the cylindrical battery cell can be placed on both sides of the liquid cooling plate 1, or only on one side of the liquid cooling plate 1, which is not limited herein.

[0042] As shown in Figure 1 , Figure 3 and Figure 7 , optionally, the liquid cooling plate 1 has a plurality of liquid cooling plates 1, and the plurality of liquid cooling plates 1 are sequentially arranged along the width direction of the liquid cooling plate 1, that is, the length directions of the plurality of liquid cooling plates 1 are relatively parallel. Optionally, in the embodiment, the plurality of liquid cooling plates 1 are connected in series and then connected in parallel through the metal pipe 2. Of course, in other embodiments, it can also be arranged to be connected in series only or connected in parallel only, or connected in parallel first and then connected in series.

[0043] As shown in Figure 7 , in the embodiment, the liquid cooling plate 1 is provided with six liquid cooling plates 1, the main input metal pipe 2 is divided into two streams through a flow divider, and then the two streams are connected to one end of the two middle liquid cooling plates 1 through two metal pipes 2. The other end of the two middle liquid cooling plates 1 is connected to the two edge liquid cooling plates 1 through the metal pipe 2 respectively, and the left middle liquid cooling plate 1 is connected to the leftmost liquid cooling plate 1, and the right middle liquid cooling plate 1 is connected to the rightmost liquid cooling plate 1. Then the other end of the two edge liquid cooling plates 1 is connected to the middle liquid cooling plate 1 through the adjacent liquid cooling plate 1 respectively, and the liquid coolant from the two middle liquid cooling plates 1 is converged through the flow divider and reaches the main output metal pipe 2, and then connected to the main input metal pipe 2 through the external pipeline. The above-mentioned liquid cooling plate 1 is connected in series and then connected in parallel, and the connection from the middle to the edge can improve the balance of heat exchange as much as possible and ensure the temperature consistency of the battery cells at all places.

[0044] As shown in Figure 5 and Figure 6 , in order to adjust the distance between the connecting piece 3 and the liquid cooling plate 1, the liquid cooling device further comprises an adjusting rod 4. The connecting piece 3 is provided with a first through hole 311, the liquid cooling plate 1 is provided with a threaded hole, the adjusting rod 4 is provided with an external thread, and the adjusting rod 4 is screwed to the threaded hole through the first through hole 311. By rotating the threaded hole, the depth of the screw rod inserted into the threaded hole can be adjusted, that is, the distance between the nut of the screw rod and the liquid cooling plate 1 is adjusted. Because the connecting piece 3 is between the nut and the liquid cooling plate 1, the movable distance of the connecting piece 3 is adjusted, that is, the assembly tolerance of the metal pipe 2 can be absorbed according to the actual situation of assembly.

[0045] Optionally, the connecting member 3 comprises a first connecting member 31, two second through holes are formed in the first connecting member 31, and the two metal pipes 2 pass through the two second through holes and are inserted into the two communication openings of the liquid cooling plate 1. Figure 2 and Figure 4 As shown in the figure, at least one of the two second through holes of one first connecting member 31 has a notch 313 which is formed along the radial direction of the second through hole. The notch 313 can further absorb the assembly tolerance of the metal pipe 2, and the metal pipe 2 can have a certain movement or inclination angle in the radial direction. Optionally, the notch 313 is formed along the direction perpendicular to the connecting line of the two second through holes.

[0046] Optionally, among the two metal pipes 2 connected with one first connecting member 31, one metal pipe 2 is welded with the first connecting member 31, and the other metal pipe 2 is not welded with the first connecting member 31, so that the positions of the two metal pipes 2 relative to the first connecting member 31 can be adjusted to absorb the assembly tolerance of the two metal pipes 2.

[0047] As shown in the figure, Figure 6 Optionally, the connecting member 3 further comprises a second connecting member 32 which has only one second through hole and is connected with only one metal pipe 2, and the metal pipe 2 is welded with the second connecting member 32. By rotating the adjusting rod 4, the distance between the second connecting member 32 and the liquid cooling plate 1 can be adjusted, so as to absorb the assembly tolerance between the metal pipe 2 and the liquid cooling plate 1.

[0048] The end of the liquid cooling plate 1 which has two spaced internal flow channels 11 is provided with a first connecting member 31, so that the two metal pipes 2 are connected with the two internal flow channels 11 respectively. The end of the liquid cooling plate 1 which has only one internal flow channel 11 is provided with a second connecting member 32. In this embodiment, the two liquid cooling plates 1 in the middle are provided with first connecting members 31, and the other four liquid cooling plates 1 are all provided with second connecting members 32. Of course, in other embodiments, all the liquid cooling plates 1 can be provided with only one internal flow channel 11, or all the liquid cooling plates 1 can be provided with two internal flow channels 11, or part of the liquid cooling plates 1 are provided with one internal flow channel 11 and part of the liquid cooling plates 1 are provided with two internal flow channels 11.

[0049] As shown in the figure, Figure 5 In order to limit the movement range of the metal pipe 2 which is not welded with the first connecting member 31, optionally, the outer wall of the metal pipe 2 is provided with a protruding portion 21, and the second through hole has a stepped surface 312 which abuts against the end surface of the protruding portion 21 away from the communication opening, so that the connecting member 3 can limit the movement of the metal pipe 2 in the direction away from the communication opening, that is, the protruding portion 21 can only move in the space between the liquid cooling plate 1 and the stepped surface 312 of the first connecting member 31.

[0050] As shown in the figure, Figure 6As shown, the second through hole of the second connecting piece 32 also has a stepped surface 312, which abuts against the protruding portion 21 of the metal pipe 2. By abutting against the metal pipe 2 in the mechanical structure, the stress at the welding position between the second connecting piece 32 and the metal pipe 2 can be reduced.

[0051] To ensure that the metal pipe 2 is sealingly connected with the communication port, the liquid cooling device optionally further comprises a sealing ring 5, which is sleeved on the metal pipe 2 and clamped between the metal pipe 2 and the inner wall of the communication port. The sealing ring 5 is in interference fit with the communication port, so as to ensure that the gap between the metal pipe 2 and the inner wall of the communication port is circumferentially sealed.

[0052] To prevent the sealing ring 5 from being displaced on the metal pipe 2, a limiting groove 22 is optionally annularly arranged on the metal pipe 2. The sealing ring 5 is located in the limiting groove 22, and the limiting groove 22 is located on the portion of the metal pipe 2 inserted into the communication port.

[0053] Optionally, the metal pipe 2 between the plurality of liquid cooling plates 1 can be a metal pipe 2 with a thinner wall, which can withstand a certain degree of deformation, so as to further improve the absorption of assembly tolerance.

[0054] Optionally, the liquid cooling device further comprises a feed-through 6 connected to the battery box, and the feed-through 6 is arranged at a third through hole of the battery box. The feed-through 6 is also provided with two communication ports, and one end of the two metal pipes 2 is respectively communicated with the two communication ports of the feed-through 6, and the other end is communicated with the liquid cooling plate 1. One end of the communication port of the feed-through 6 is arranged towards the inside of the battery box, that is, the two communication ports are respectively communicated with the metal pipes 2 of the main input and the main output, and the other end of the communication port of the feed-through 6 is arranged towards the outside of the battery box, so as to be communicated with the external pipeline, forming a circulating loop.

[0055] Similarly to the arrangement at the liquid cooling plate 1, the feed-through 6 also optionally has a connecting piece 3 and an adjusting rod 4. By adjusting the adjusting rod 4, the distance between the connecting piece 3 and the feed-through 6 is adjusted, so as to adjust the depth of the metal pipe 2 inserted into the communication port of the feed-through 6, that is, the assembly tolerance of the metal pipe 2 in the depth direction of the insertion of the communication port can be absorbed. In this embodiment, the first connecting piece 31 is arranged at the feed-through 6.

[0056] Optionally, in this embodiment, the metal pipe 2 is inserted into the communication port of the liquid cooling plate 1 in the thickness direction of the liquid cooling plate 1, and is inserted into the communication port of the feed-through 6 in the width direction of the liquid cooling plate 1. One of the two first through holes 311 of the connecting piece 3 of the liquid cooling plate 1 communicated with the shunt has a notch 313, which is arranged in the length direction of the liquid cooling plate 1. The above design can absorb the assembly tolerance of the metal pipe 2 in the thickness direction, the width direction and the length direction of the liquid cooling plate 1, so as to ensure that the metal pipe 2 can be sealingly assembled.

[0057] The embodiment also provides a battery pack, comprising a battery box and the liquid cooling device, and the liquid cooling device is arranged in the battery box.

[0058] The battery pack can meet the high blast pressure resistance requirement and can absorb assembly tolerance.

[0059] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above description. Here, all the embodiments are not exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. Liquid cooling device, characterized in that The application relates to a liquid cooling device. The liquid cooling device comprises a plurality of liquid cooling plates (1), a plurality of metal pipes (2), and a plurality of connecting pieces (3). The metal pipes (2) are used to connect two liquid cooling plates (1), and the end portions of the metal pipes (2) are sealingly inserted into the connecting openings of the liquid cooling plates (1). The connecting pieces (3) are arranged at the joint of the metal pipes (2) and the liquid cooling plates (1), the metal pipes (2) are connected to the connecting pieces (3), the connecting pieces (3) are connected to the liquid cooling plates (1), the distance between the connecting pieces (3) and the liquid cooling plates (1) can be adjusted, and the depth of the metal pipes (2) inserted into the connecting openings changes with the distance between the connecting pieces (3) and the liquid cooling plates (1).

2. The liquid cooling device of claim 1, wherein, The connecting pieces (3) are provided with first through holes (311), the liquid cooling plates (1) are provided with threaded holes, and the adjusting rods (4) are provided with external threads.

3. The liquid cooling device of claim 1, wherein, The connecting pieces (3) are provided with second through holes, the metal pipes (2) are inserted into the connecting openings through the second through holes, the outer walls of the metal pipes (2) are provided with protruding portions (21), the second through holes are provided with stepped surfaces (312), the stepped surfaces (312) abut against the end surfaces of the protruding portions (21) away from the connecting openings, and the connecting pieces (3) can limit the movement of the metal pipes (2) away from the connecting openings.

4. The liquid cooling device of claim 1, wherein, The liquid cooling device further comprises sealing rings (5), the sealing rings (5) are sleeved on the metal pipes (2) and clamped between the metal pipes (2) and the inner walls of the connecting openings, and the sealing rings (5) are in interference fit with the connecting openings.

5. The liquid cooling device of claim 4, wherein, The metal pipes (2) are provided with limiting grooves (22), and the sealing rings (5) are located in the limiting grooves (22).

6. The liquid cooling device according to any one of claims 1 to 5, characterized in that, The connecting pieces (3) comprise first connecting pieces (31), the first connecting pieces (31) are provided with two second through holes, two metal pipes (2) pass through the two second through holes and are inserted into two connecting openings of the liquid cooling plates (1), at least one of the two second through holes of one first connecting piece (31) is provided with a notch (313), and the notch (313) is provided through the radial direction of the second through hole.

7. The liquid cooling device according to any one of claims 1 to 5, characterized in that, The cross section of the liquid cooling plate (1) along a first plane is wavy, the first plane is parallel to the length direction of the liquid cooling plate (1), and the first plane is perpendicular to the width direction of the liquid cooling plate (1).

8. The liquid cooling device according to any one of claims 1 to 5, characterized in that, A plurality of liquid cooling plates (1) are arranged along the width direction of the liquid cooling plate (1) in sequence, and the plurality of liquid cooling plates (1) are connected in series and then in parallel through the metal pipes (2).

9. The liquid cooling device according to any one of claims 1 to 5, characterized in that, The liquid cooling device further comprises a wall penetration joint (6), the wall penetration joint (6) is connected to a battery box, and the wall penetration joint (6) is arranged at a third through hole of the battery box.

10. A battery pack, characterized by, The application relates to a battery box and a liquid cooling device as claimed in any one of claims 1-9, and the liquid cooling device is arranged in the battery box.

Images