Battery pack

Abstract

The embodiment of the utility model provides a battery pack. The battery pack comprises a heat exchange plate, a connecting pipe, a water nozzle and a flexible sealing piece, the flexible sealing pieces are arranged at the two axial ends of the connecting pipe. The flexible sealing piece is connected with the water nozzle in an inserted mode, the flexible sealing piece is in interference fit with the connecting pipe, the flexible sealing piece is in interference fit with the water nozzle, and the flexible sealing piece is located between the connecting pipe and the water nozzle; the multiple heat exchange plates are arranged at intervals, flow channels are arranged in the heat exchange plates, the flexible sealing pieces, the water nozzles and the connecting pipes communicate with the flow channels of every two adjacent heat exchange plates, and the connecting pipes are located in cavities between the ends of every two adjacent heat exchange plates. Thus, connection between the connecting pipe and the water nozzle can be achieved through the flexible sealing piece, under the action of the flexible sealing piece, the sealing performance of the liquid cooling flow channel between the heat exchange plates can be guaranteed, the matching difficulty of the connecting pipe and the water nozzle can be reduced, deformation of the connecting pipe during connection cannot be caused, and the service life of the connecting pipe can be prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a battery pack. Background Art

[0002] As users' requirements for the range of pure electric vehicles become higher and higher, the energy density of battery cells is also increasing, which causes the heat generated by the battery cells to increase when working. At the same time, as the number of battery cells increases, temperature consistency becomes more difficult to control, and temperature control becomes more and more important.

[0003] At present, battery cells usually use liquid-cooled cold plates to dissipate heat. However, due to the limited space between two adjacent liquid-cooled cold plates, it is difficult to connect two adjacent liquid-cooled cold plates using connecting tubes. The connecting tubes will be subjected to a large axial pressing force when assembled with the liquid cooling tubes, which can easily cause deformation of the connecting tubes or connection failure, and easily lead to poor sealing reliability. Summary of the invention

[0004] In order to solve or partially solve the above problems, the present invention discloses a battery pack to solve the problem in the prior art that it is difficult to connect two adjacent liquid-cooled cold plates with a connecting pipe.

[0005] To solve the above technical problems, an embodiment of the present invention provides a battery pack having a first direction and a second direction intersecting each other, wherein the battery pack includes a heat exchange plate, a connecting pipe, a water nozzle, and a flexible sealing member;

[0006] The connecting pipe extends along the second direction, and the flexible sealing member is arranged at both ends of the connecting pipe along the second direction;

[0007] The flexible seal is plugged into the faucet, and the flexible seal at least partially abuts between the connecting pipe and the faucet;

[0008] There are multiple heat exchange plates, which are arranged at intervals along the second direction. A flow channel is provided inside the heat exchange plate, and at least part of the flexible seal, the water nozzle and the connecting pipe are connected to the flow channels of two adjacent heat exchange plates.

[0009] In the present invention, since the flexible seals are arranged at both ends of the connecting pipe axially, the flexible seals and the water nozzles are plugged in, the flexible seals at least partially abut between the connecting pipe and the water nozzles, there are multiple heat exchange plates, the multiple heat exchange plates are arranged at intervals, and a flow channel is arranged inside the heat exchange plate. At least part of the flexible seals, the water nozzles and the connecting pipes are connected to the flow channels of two adjacent heat exchange plates. Therefore, the connection between the connecting pipe and the water nozzle can be achieved through the flexible seal, and under the connection of the flexible seal, not only the sealing of the liquid cooling flow channel between the heat exchange plates can be guaranteed, but also the crimping force of the connecting pipe and the water nozzle in the second direction can be absorbed, thereby avoiding deformation of the connecting pipe when connecting the water nozzle, which is beneficial to improving the service life of the connecting pipe and ensuring the connection reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 is a schematic diagram of an assembly of a battery pack according to an embodiment of the present invention;

[0012] Figure 2 is a schematic diagram of the structure of a battery pack according to an embodiment of the present invention;

[0013] Figure 3 is a schematic structural diagram of a connecting tube, a water nozzle and a flexible sealing member included in a battery pack according to an embodiment of the present invention;

[0014] Figure 4 is a schematic cross-sectional view of a battery pack along a first direction Z according to an embodiment of the present invention;

[0015] Figure 5 It is a schematic assembly diagram of a connecting tube, a water nozzle and a flexible sealing member included in a battery pack according to an embodiment of the present invention.

[0016] Description of reference numerals:

[0017] 1-heat exchange plate; 2-connecting pipe; 3-water nozzle; 4-flexible seal; 5-battery cell; 21-connecting slot; 22-limiting flange; 31-sealed cavity; 32-avoidance ramp; 41-annular structure; 42-clamping rib; 221-disk; 321-first end; 322-second end. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The term "parallel" in this application includes not only the absolute parallel situation, but also the generally parallel situation conventionally recognized in engineering, such as "parallel" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is -1° to 1°; at the same time, "vertical" also includes not only the absolute vertical situation, but also the generally vertical situation conventionally recognized in engineering, such as "vertical" refers to the state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°. Equal distances or equal angles include not only the absolute equal situation, but also the generally equal situation conventionally recognized in engineering, that is, there may be a certain error, such as the state where the tolerance range is -1% to 1%.

[0020] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0021] Figure 1 is a schematic diagram of an assembly of a battery pack according to an embodiment of the present invention, Figure 2 is a schematic diagram of the structure of a battery pack according to an embodiment of the present invention, Figure 3 It is a schematic structural diagram of a battery pack according to an embodiment of the present invention, including a connecting tube, a water nozzle and a flexible sealing member.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a battery pack having a first direction Z, a second direction X and a third direction Y intersecting in pairs, and the battery pack includes a heat exchange plate 1, a connecting pipe 2, a water nozzle 3 and a flexible sealing member 4.

[0023] The connecting pipe 2 extends along the second direction X, and the flexible seal 4 is arranged at both ends of the connecting pipe 2 along the second direction X. The flexible seal 4 and the faucet 3 are plugged into each other, and the flexible seal 4 at least partially abuts between the connecting pipe 2 and the faucet 3. Specifically, the flexible seal 4 and the connecting pipe 2 have an interference fit, and the flexible seal 4 and the faucet 3 have an interference fit.

[0024] There are multiple heat exchange plates 1, which are arranged at intervals along the second direction X. A flow channel for the circulation of cooling medium is provided inside the heat exchange plate 1. At least part of the flexible seal 4, the water nozzle 3 and the connecting pipe 2 are connected to the flow channels of two adjacent heat exchange plates 1. The connecting pipe 2 is located in the cavity between the ends of the two adjacent heat exchange plates 1.

[0025] It can be seen from the above embodiments that in the embodiments of the present invention, since the flexible seal 4 is arranged at both ends of the connecting pipe 2 in the axial direction, the flexible seal 4 and the water nozzle 3 are plugged in, the flexible seal 4 and the connecting pipe 2 are interference fit, the flexible seal 4 and the water nozzle 3 are interference fit, and at least part of the flexible seal 4 abuts between the connecting pipe 2 and the water nozzle 3. The heat exchange plate 1 has multiple heat exchange plates 1, and the multiple heat exchange plates 1 are arranged at intervals. A flow channel is arranged inside the heat exchange plate 1. At least part of the flexible seal 4, the water nozzle 3 and the connecting pipe 2 communicate with the flow channels of two adjacent heat exchange plates 1. Therefore, the connection between the connecting pipe 2 and the water nozzle 3 can be achieved through the flexible seal 4, and under the connection of the flexible seal 4, not only the sealing of the liquid cooling flow channel between the heat exchange plates 1 can be guaranteed, but also the crimping force of the connecting pipe 2 and the water nozzle 3 in the second direction can be absorbed, so as to avoid deformation of the connecting pipe 2 when connecting the water nozzle, which is beneficial to improve the service life of the connecting pipe 2 and ensure the connection reliability.

[0026] It should be noted that in the embodiment of the present invention, the heat transfer is achieved by passing the heat exchange fluid into the heat exchange tube, connecting the heat exchange plate 1 with the heat source in the battery pack, and transferring the heat to the heat exchange fluid. A plurality of heat exchange plates 1 are arranged at intervals, and the plurality of heat exchange plates 1 are connected by connecting pipes 2, water nozzles 3 and flexible seals 4. Among them, the flow channel provided inside the heat exchange plate 1 is used for the flow of the heat exchange fluid, so it is necessary to enable the liquid cooling flow channel between two adjacent heat exchange plates 1 to be able to be quickly connected, and to ensure the sealing of the heat exchange fluid flowing in the liquid cooling flow channel.

[0027] In addition, the water nozzle 3 is an important component that connects two adjacent heat exchange plates 1 and connects the liquid cooling channels between the two adjacent heat exchange plates 1. By connecting the channels in the two adjacent heat exchange plates 1 through the water nozzle 3, the circulation of the heat exchange fluid in the heat exchange plate 1 can be ensured. The water nozzle 3 is usually a tubular structure. The water nozzle 3 is usually fixed to the end of the heat exchange plate 1 by welding, clamping, etc., and the two ends of the water nozzle 3 protrude from the two opposite heat exchange surfaces of the heat exchange plate 1. During assembly, it is only necessary to set the flexible seals 4 at both ends of the connecting pipe 2 in the axial direction, and then plug the flexible seals 4 and the water nozzle 3. That is, the opposite ends of the water nozzle 3 between the two adjacent heat exchange plates 1 are plugged through the two seals at both ends of the connecting pipe 2 in the axial direction, so that the quick connection between the two adjacent heat exchange plates 1 can be achieved.

[0028] In the embodiment of the present invention, the tensile strength of the faucet 3 is greater than the tensile strength of the flexible seal 4. Since the material is subjected to the maximum stress value before being pulled apart, the maximum stress value borne by the faucet 3 before being pulled apart should be greater than the maximum stress value borne by the flexible seal 4 before being pulled apart. In other words, the structure of the faucet 3 is less likely to deform than the structure of the flexible seal 4, thereby ensuring that the faucet 3 is less likely to fail in sealing. Furthermore, in some embodiments, the structure of the faucet 3 is a hard material that is not easily deformed and has a high hardness. Exemplarily, the material of the faucet 3 can be a hard material such as an alloy material, a polymer material, a metal material, a ceramic material, a carbon fiber material, etc., which is not limited in the embodiment of the present invention.

[0029] In addition, it should be noted that the material of the flexible seal 4 can be any material with certain flexibility and ductility such as nitrile rubber, silicone rubber, fluorine rubber, EPDM rubber, chloroprene rubber, butyl rubber, acrylic rubber, metal rubber, polyurethane rubber, etc., and the embodiment of the present invention does not limit this. In this way, when the flexible seal 4 and the water nozzle 3 are plugged in, the flexible seal 4 can be used with the help of the deformability of the flexible seal 4, so that the flexible seal 4 can be interference-fitted with the connecting pipe 2 and the water nozzle 3, thereby ensuring the sealing of the liquid cooling flow channel of the two adjacent heat exchange plates 1.

[0030] Next, the structure of the connecting pipe 2, the structure of the flexible sealing member 4 and the structure of the faucet 3 provided in the embodiment of the present invention are described in detail as follows:

[0031] Regarding the structure of the flexible seal 4 and the connecting tube 2 and the related assembly method, in some embodiments, a connecting groove 21 is provided on the outer wall of the connecting tube 2, the flexible seal 4 is an annular seal, and a snap-fit ​​rib 42 is provided on the flexible seal 4, and the snap-fit ​​rib 42 is snap-fitted to the connecting groove 21.

[0032] In this embodiment, the connecting slot 21 is arranged around the outer wall of the connecting pipe 2. Specifically, the axis of the connecting slot 21 coincides with the axis of the connecting pipe 2, and the connecting slot 21 is an annular slot. The snap-fitting rib 42 is arranged on the inner annular surface of the flexible seal 4, and the snap-fitting rib 42 protrudes from the inner annular surface of the flexible seal 4 to form an annular raised surface. The number of the connecting slots 21 can be one or more, and the number of the snap-fitting ribs 42 is consistent with the number of the connecting slots 21. In this way, after the snap-fitting rib 42 is snap-fitted to the connecting slot 21, it can be ensured that the flexible seal 4 and the connecting pipe 2 have an interference fit, and it can be ensured that the flexible seal 4 will not fall off due to extrusion, thereby ensuring the sealing effect of the flexible seal 4. It should be noted that by setting a plurality of snap-fitting ribs 42 to snap-fit ​​with a plurality of connecting slots 21, a plurality of seals can be provided between the flexible seal 4 and the connecting pipe 2, thereby further ensuring the sealing effect of the flexible seal 4.

[0033] Regarding the structure of the faucet 3, in some embodiments, the faucet 3 is a tubular structure, and a sealing cavity 31 for accommodating the flexible seal 4 is formed inside the faucet 3, the sealing cavity 31 is recessed and extends from the inside to the outside, and the flexible seal 4 is at least partially accommodated in the sealing cavity 31, wherein the recessed extension from the inside to the outside refers to the recessed extension in the direction from the inner wall of the faucet 3 to the outer wall.

[0034] In this case, a sealing cavity 31 for accommodating the flexible seal 4 is formed inside the faucet 3, that is, the inner wall of the sealing cavity 31 is concave toward the outer wall. In this way, when the sealing cavity and the outer wall of the flexible seal 4 are interference-fitted, it can be ensured that the sealing position of the connecting pipe 2 is located in the sealing cavity 31 inside the faucet 3, and when the cavity wall of the sealing cavity 31 and the outer wall of the flexible seal 4 are squeezed, the flexible seal 4 can have a larger deformation space to absorb the assembly tolerance, further ensure the convenience and reliability of the connection between the sealing position of the connecting pipe 2 and the faucet 3, and ensure the sealing effect.

[0035] In this embodiment, the outer wall surface of the flexible seal 4 is a spherical surface, and the inner wall surface of the sealing cavity 31 is adapted to the flexible seal 4. Specifically, the inner wall surface of the sealing cavity 31 is also a spherical surface, so that the inner wall surface of the sealing cavity 31 and the flexible seal 4 can be attached to each other and tightly connected, further improving the connection sealing reliability.

[0036] As for the specific structure of the flexible seal 4, the flexible seal 4 is a roughly spherical structure. In some embodiments, the size of the flexible seal 4 in the first direction Z decreases from the two ends to the middle along the second direction X. In this embodiment, since the size of the flexible seal 4 in the first direction Z increases from the two ends to the middle along the second direction X, the flexible seal 4 forms a structure with a large volume in the middle and a small volume at both ends, that is, the flexible seal 4 forms a "gourd"-shaped structure. In this way, after the flexible seal 4 is installed in the sealing cavity 31 inside the faucet 3, the two ends of the middle of the flexible seal 4 in the second direction X form a constriction structure, which is equivalent to constituting a limit to the flexible seal 4 in the second direction X and the first direction Z, so as to prevent the flexible seal 4 from falling off from the sealing cavity 31 inside the faucet 3, which is conducive to ensuring the sealing stability of the flexible seal 4.

[0037] In this embodiment, the inner wall of the end of the faucet 3 is provided with an escape ramp 32; the escape ramp 32 is located on the side of the faucet 3 close to the connecting pipe 2, the end of the escape ramp 32 close to the connecting pipe 2 is the first end 321, and the end of the escape ramp 32 away from the connecting pipe 2 is the second end 322; the radial dimension of the first end 321 is greater than the radial dimension of the second end 322, preferably, in some embodiments, the radial dimension of the escape ramp 32 decreases from the first end 321 to the second end 322, so as to form a bell-mouth structure at the end of the faucet 3. In this embodiment, the first direction Z is parallel to the radial direction of the faucet 3, and the dimension of the first direction Z is used to represent the radial dimension below.

[0038] In this embodiment, since the size of the avoidance ramp opening 32 in the first direction Z decreases gradually from the first end 321 to the second end 322 to form a bell-mouth structure at the end of the faucet 3, the size of the avoidance ramp opening 32 in the first direction Z can decrease gradually from the end away from the sealed cavity 31 to the end close to the sealed cavity 31. In this way, when installing the connecting pipe 2, it can be screwed in from the end away from the sealing cavity 31 by the avoidance ramp opening 32. As the screw-in depth of the connecting pipe 2 increases, the size of the avoidance ramp opening 32 in the first direction Z also decreases, so that the gap between the outer wall of the connecting pipe 2 and the avoidance ramp opening 32 also decreases. Then, a larger avoidance space can be provided by the avoidance ramp opening 32, which can facilitate the assembly of the connecting pipe 2 and ensure the sealing between the connecting pipe 2 and the faucet 3. Moreover, when the connecting pipe 2 is inserted into the faucet 3, the avoidance ramp opening 32 is formed between the connecting pipe 2 and the faucet 3, so that the connecting pipe 2 can be deformed and tilted to a certain extent in the radial direction of the connecting pipe 2, thereby absorbing the assembly tolerance and making the connection between the connecting pipe 2 and the faucet 3 more reliable.

[0039] It should be noted that according to Figure 1 and Figure 2 In the embodiment of the present invention, the X-axis direction intersects with the Z-axis direction, and the X-axis direction intersects with the Y-axis direction. For ease of description, the first direction is defined as the Z-axis direction, the second direction is defined as the X-axis direction (that is, the axial direction of the connecting tube 22 in the embodiment of the present invention), and the third direction is defined as the Y-axis direction.

[0040] Optionally, the flexible seal 4 has an outer wall and an inner wall relative to each other, a gap is provided between the outer wall of the flexible seal 4 and the first end 321 in the first direction Z, and the outer wall of the flexible seal 4 and the second end 322 are interference fit. In this way, as the connecting pipe 2 is screwed in, the flexible seal 4 is squeezed and deformed, thereby eliminating a gap between the connecting pipe 2 and the faucet 3, thereby ensuring the sealing of the connection portion between the connecting pipe 2 and the faucet 3.

[0041] Further, in the second direction X, the end surface of the flexible seal 4 protrudes from the end surface of the connecting pipe 2 in the second direction X, and the protruding portion of the flexible seal 4 abuts against the end surface of the connecting pipe 2 in the second direction close to the water nozzle 3. That is, the end surface of the flexible seal 4 in the second direction X exceeds the end surface of the connecting pipe 2 in the second direction X. In this embodiment, it can be ensured that the flexible seal 4 can fully play a role in sealing the connecting pipe 2 in the second direction X, thereby ensuring that the flexible seal 4 is sealed at any position of the connecting portion of the connecting pipe 2 and the water nozzle 3.

[0042] In addition, in some optional embodiments, a plurality of annular structures 41 are provided on the outer wall of the flexible seal 4. The annular structures 41 protrude from the outer wall of the flexible seal 4. The annular structures 41 are arranged around the flexible seal 4. An interference fit is formed between the annular structures 41 and the inner wall of the faucet 3.

[0043] It should be noted that, since the annular structure 41 protrudes from the outer wall of the flexible seal 4 and is arranged around the flexible seal 4, and there is an interference fit between the annular structure 41 and the inner wall of the faucet 3, on the one hand, the annular structure 41 can increase the extrusion force between the flexible seal 4 and the faucet 3 and enhance the sealing between the flexible seal 4 and the faucet 3; on the other hand, due to the presence of multiple annular structures 41, even if the connecting pipe 2 is rotated by a certain angle, the sealing between the flexible seal and the faucet 3 can still be guaranteed by the multiple annular structures 41.

[0044] Regarding the structure of the connecting pipe 2, in some embodiments, a limiting flange 22 is provided on the outer wall of the connecting pipe 2; the limiting flange 22 is arranged around the connecting pipe 2; the limiting flange 22 has two opposite disks 221 in the second direction X, and the limiting flange 22 protrudes from the outer wall of the connecting pipe 2. In some embodiments, the limiting flange 22 is located between two adjacent water spouts 3, and the disk 221 and the water spouts 3 are spaced apart along the second direction, or the disk 221 abuts against the water spouts 3, so that the length of the connecting pipe 2 inserted into the water spouts 3 is limited, so as to prevent the connecting pipe 2 from being too inserted into one of the water spouts 3 and causing the other end to be disengaged.

[0045] In this embodiment, the limiting flange 22 can be understood as a raised annular structure provided on the outer wall of the connecting pipe 2. The number of the limiting flanges 22 can be one or more, which is not limited in the embodiment of the present invention. Since the limiting flange 22 protrudes from the outer wall of the connecting pipe 2, the limiting flange 22 is located between two adjacent water nozzles 3. The limiting flange 22 can prevent the connecting pipe 2 from being over-inserted, thereby ensuring the stability and sealing of the assembly.

[0046] In some embodiments, the elastic modulus of the flexible seal 4 is smaller than that of the connecting pipe 2 , so that the flexible seal 4 can absorb the assembly tolerance and assembly stress between the connecting pipe 2 and the faucet 3 .

[0047] In some embodiments, the elastic modulus of the connecting pipe 2 is smaller than the elastic modulus of the faucet 3 , so that the connecting pipe 2 itself can also absorb certain assembly tolerances and assembly stresses.

[0048] In addition, in some embodiments, the battery pack further includes a plurality of battery cells 5, the plurality of battery cells 5 are arranged along the second direction X and the third direction Y, and the battery cells 5 are arranged between two adjacent heat exchange plates 1. In this way, through the sealed connection between the connecting pipe 2, the water nozzle 3, and the flexible seal 4, it can be ensured that the heat exchange fluid can flow from one heat exchange plate 1 to another heat exchange plate 1. Since the battery cells 5 are arranged between two adjacent heat exchange plates 1, when the heat exchange fluid circulates in the two adjacent heat exchange plates 1, the heat generated by the heat exchange plate 1 and the battery cells 5 can be connected to achieve heat transfer, thereby transferring the heat to the heat exchange fluid, achieving rapid heat dissipation of the battery cells 5, and thus improving the service life of the battery pack.

[0049] It can be seen from the above embodiments that in the embodiments of the present invention, since the flexible seal 4 is arranged at both ends of the connecting tube 2 in the axial direction, the flexible seal 4 and the water nozzle 3 are plugged in, the flexible seal 4 and the connecting tube 2 are interference fit, the flexible seal 4 and the water nozzle 3 are interference fit, and the flexible seal 4 is located between the connecting tube 2 and the water nozzle 3. The heat exchange plate 1 has multiple, multiple heat exchange plates 1 are arranged at intervals, and a flow channel is arranged inside the heat exchange plate 1. The flexible seal 4, the water nozzle 3 and the connecting tube 2 communicate with the flow channels of two adjacent heat exchange plates 1. Therefore, the connection between the connecting tube 2 and the water nozzle 3 can be achieved through the flexible seal 4. Under the action of the flexible seal 4, not only can the sealing of the liquid cooling flow channel between the heat exchange plates 1 be guaranteed, but also the crimping force of the connecting tube 2 and the water nozzle 3 in the second direction can be absorbed, thereby avoiding deformation of the connecting tube 2 when connected to the water pipe 3, which is beneficial to improving the service life of the connecting tube 2 and ensuring the connection reliability, thereby improving the safety of the battery pack.

[0050] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0051] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0052] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0053] The present invention has been introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A battery pack having a first direction (Z) and a second direction (X) intersecting each other, characterized in that: The battery pack comprises a heat exchange plate (1), a connecting pipe (2), a water nozzle (3) and a flexible sealing member (4); The connecting pipe (2) extends along the second direction (X), and the flexible sealing member (4) is arranged at both ends of the connecting pipe (2) along the second direction (X); The flexible sealing member (4) and the water nozzle (3) are plugged into each other, and the flexible sealing member (4) at least partially abuts between the connecting pipe (2) and the water nozzle (3); The heat exchange plates (1) are provided in plurality, and the plurality of heat exchange plates (1) are arranged at intervals along the second direction (X). A flow channel is provided inside the heat exchange plates (1), and at least a portion of the flexible sealing member (4), the water nozzle (3) and the connecting pipe (2) are connected to the flow channels of two adjacent heat exchange plates (1).

2. The battery pack according to claim 1, characterized in that: The outer wall of the connecting pipe (2) is provided with a connecting groove (21); the flexible sealing member (4) is an annular sealing member; a clamping convex rib (42) is provided on the flexible sealing member (4); and the clamping convex rib (42) is clamped on the connecting groove (21).

3. The battery pack according to claim 1, characterized in that: The faucet (3) is a tubular structure, and a sealing cavity (31) for accommodating the flexible sealing member (4) is formed inside the faucet (3). The sealing cavity (31) is recessed and extends from the inside to the outside, and the flexible sealing member (4) is at least partially accommodated in the sealing cavity (31).

4. The battery pack according to claim 1, characterized in that: The water nozzle (3) is a tubular structure, and the inner wall of the end of the water nozzle (3) is provided with an avoidance ramp opening (32); The avoidance ramp opening (32) is located on a side of the water nozzle (3) close to the connecting pipe (2); the end of the avoidance ramp opening (32) close to the connecting pipe (2) is a first end (321); and the end of the avoidance ramp opening (32) away from the connecting pipe (2) is a second end (322); The radial dimension of the first end (321) is greater than the radial dimension of the second end (322).

5. The battery pack according to claim 4, characterized in that: The flexible seal (4) has an outer wall and an inner wall relative to each other, a gap is provided between the outer wall of the flexible seal (4) and the first end (321) in the first direction (Z), and the outer wall of the flexible seal (4) and the second end (322) are interference fit.

6. The battery pack according to claim 3, characterized in that: The outer wall of the flexible sealing member (4) is a spherical surface, and the inner wall surface of the sealing cavity (31) is adapted to the flexible sealing member (4).

7. The battery pack according to claim 1, characterized in that: In the second direction (X), the end surface of the flexible sealing member (4) protrudes from the connecting tube (2) and abuts against the end surface of the connecting tube (2) in the second direction (X).

8. The battery pack according to claim 1, characterized in that: A limiting flange (22) is provided on the outer wall of the connecting pipe (2); The limiting flange (22) is arranged around the outer wall of the connecting pipe (2); The limiting flange (22) has two opposite disk surfaces (221) in the second direction (X); the limiting flange (22) is located between two adjacent water nozzles (3); and the disk surface (221) and the water nozzle (3) are spaced apart or abutted against each other along the second direction (X).

9. The battery pack according to claim 1, characterized in that: A plurality of annular structures (41) are arranged on the outer wall of the flexible seal (4); the annular structures (41) protrude from the outer wall of the flexible seal (4); the annular structures (41) are arranged around the flexible seal (4); and the annular structures (41) are interference-fitted with the inner wall of the faucet (3).

10. The battery pack according to claim 1, characterized in that: The battery pack satisfies at least one of the following conditions: i) the elastic modulus of the flexible sealing member (4) is smaller than the elastic modulus of the connecting pipe (2); ii) the elastic modulus of the connecting pipe (2) is smaller than the elastic modulus of the water nozzle (3); iii) The tensile strength of the water nozzle (3) is greater than the tensile strength of the flexible sealing element (4).

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