Pipe connection structure, heat management assembly, and battery pack

Abstract

To provide a pipe connection structure, a heat management assembly, and a battery pack.SOLUTION: The pipe connection structure includes a first pipe joint, a second pipe joint, and a position restriction structure. The second pipe joint is connected to the first pipe joint through insertion. The second pipe joint has an outer surface provided with a first engaging structure. The position restriction structure has an end connected to the first pipe joint and has the other end provided with a second engaging structure. The second engaging structure is press-fitted and clearance-fitted with the first engaging structure.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This application claims priority based on Chinese patent applications with application numbers 202410039571.X and 202420064337.8 filed with the China National Intellectual Property Administration on January 10, 2024, and an international application with application number PCT / CN2024 / 095782 filed on May 28, 2024. All the contents described in the above applications are incorporated herein by reference. The present disclosure relates to the field of battery technology, and more specifically, to a pipe connection structure, a thermal management assembly, and a battery pack.

Background Art

[0002] In related technologies, a battery pack includes a battery box, battery modules installed in the battery box, and a thermal management assembly. Here, the thermal management assembly includes thermal management components thermally coupled to battery cells and pipe components. A plurality of flow paths for circulating a heat exchange medium are installed in the thermal management components. The pipe components include an inlet pipe and an outlet pipe. The inlet pipe is communicated with the inlet port of the flow path, and the outlet pipe is communicated with the outlet port of the flow path. The inlet pipe performs heat exchange with the battery cells by transmitting the heat exchange medium to each flow path. The heat exchange medium flows from the outlet port of each flow path to the outlet pipe, and after the heat exchange medium is cooled or heated through a temperature control module, the heat exchange medium flows into the inlet pipe. By repeating such a circulation, the temperature management of the battery cells is completed, and the battery cells are brought within a normal operating temperature range.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Conventional pipe components have high requirements for the assembly accuracy of the thermal management assembly, which makes the pipe connection design of the thermal management assembly difficult and its reliability relatively low.

Means for Solving the Problems

[0004] In a first aspect, an embodiment of the present disclosure provides a pipe connection structure. The pipe connection structure includes a first pipe fitting, a second pipe fitting, and a position limiting structure. The second pipe fitting includes a first end, the first end is inserted and connected to one end of the first pipe fitting, a first engaging structure is installed on the outer surface of the second pipe fitting, one end of the position limiting structure is connected to the outer peripheral surface of the first pipe fitting, a second engaging structure is installed at the other end, along the insertion connection direction, the second engaging structure is snap-fitted with the first engaging structure, and along the insertion connection direction, the second engaging structure is clearance-fitted with the first engaging structure.

[0005] In a second aspect, an embodiment of the present disclosure provides a thermal management assembly. The thermal management assembly includes a first main pipeline, a second main pipeline, a thermal management component, and the above-mentioned pipe connection structure. A flow path for circulating a heat exchange medium is installed in the thermal management component. The inlet and outlet of the flow path are a first port and a second port respectively. One end of the first main pipeline is communicated with the first port through one pipe connection structure, and one end of the second main pipeline is communicated with the second port through another pipe connection structure.

[0006] In a third aspect, an embodiment of the present disclosure provides a battery pack. The battery pack includes a battery module, and the battery module includes a module box, battery cells, and the above-mentioned thermal management assembly. The module box includes a mounting chamber, there are a plurality of battery cells, the plurality of battery cells are installed in the mounting chamber, the thermal management component is installed in the mounting chamber, and the thermal management component is thermally coupled to the plurality of battery cells.

Advantages of the Invention

[0007] By clearance-fitting the second engaging structure with the first engaging structure, the first pipe fitting and the second pipe fitting can be moved closer to or away from each other, and based on the clearance, the assembly tolerances of the related pipeline assembly adopting the pipe connection structure can be absorbed or supplemented, thereby reducing the assembly accuracy requirements of the related pipeline assembly.

Brief Description of the Drawings

[0008]

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Embodiments for Carrying Out the Invention

[0009] Hereinafter, specific embodiments of the present disclosure will be described with reference to the drawings. Referring to FIG. 1, FIG. 1 is a structural diagram of a pipe connection structure provided by an embodiment of the present disclosure. The embodiment of the present disclosure provides a pipe connection structure 011. The pipe connection structure 011 includes a first pipe joint 111, a second pipe joint 112, and a position limiting structure 113. The second pipe joint 112 includes a first end, and the first end is inserted and connected to one end of the first pipe joint 111. A first engaging structure 1121 is installed on the outer surface of the second pipe joint 112. One end of the position limiting structure 113 is connected to the outer peripheral surface of the first pipe joint 111, and a second engaging structure 1131 is installed at the other end. Along the insertion connection direction, the second engaging structure 1131 is snap-fitted with the first engaging structure 1121. Along the insertion connection direction, the second engaging structure 1131 is clearance-fitted with the first engaging structure 1121.

[0010] It can be understood that the clearance fit between the second engaging structure 1131 and the first engaging structure 1121 means that after the first pipe joint 111 is inserted and connected to the second pipe joint 112, the first pipe joint 111 can move in the insertion connection direction within the clearance range with respect to the second pipe joint 112.

[0011] Here, the first end may be inserted and connected to one end of the first pipe joint 111, the first end may be inserted into the inner hole of the first pipe joint 111, or one end of the first pipe joint 111 may be inserted into the inner hole of the second pipe joint 112.

[0012] In addition, the snap fit between the second engagement structure 1131 and the first engagement structure 1121 is such that one of them is a groove body and the other is a convex member. At least a part of the convex member is located in the groove body, and in the insertion connection direction, the convex member is in clearance fit with the groove body, and the snap fit in the insertion connection direction is realized based on the restriction of the groove wall of the groove body. For example, the first engagement structure 1121 is an engagement groove provided on the outer surface of the second pipe joint 112, and the second engagement structure 1131 is a convex member installed at the other end of the position limiting structure 113. By inserting the convex member into the engagement groove, in the insertion connection direction, the movement of the convex member is restricted by the groove walls on both sides of the engagement groove, and further, the snap fit between the first engagement structure 1121 and the second engagement structure 1131 is realized. And along the insertion connection direction, the dimension of the convex member is smaller than that of the engagement groove, thereby realizing the clearance fit between the second engagement structure 1131 and the first engagement structure 1121.

[0013] The snap fit between the second engagement structure 1131 and the first engagement structure 1121 may be such that both the second engagement structure 1131 and the first engagement structure 1121 are bumps. And the second engagement structure 1131 is on the side away from the position limiting structure 113 connected to the first pipe joint 111 of the first engagement structure 1121. When the first pipe joint 111 and the second pipe joint 112 move away from each other, the first engagement structure 1121 realizes the snap fit in the insertion connection direction based on the restriction on the second engagement structure 1131. And when the first pipe joint 111 and the second pipe joint 112 approach each other, the position limiting structure 113 realizes the snap fit in the insertion connection direction based on the restriction on the second pipe joint 112.

[0014] Exemplarily, the position limiting structure 113 is an engagement claw. One end of the engagement claw is connected to the outer peripheral surface of the first pipe joint 111, and the second engagement structure 1131 is provided at the other end. By connecting the first pipe joint 111 and the second pipe joint 112 with the engagement claw, the high-speed insertion connection of the pipeline can be realized, thereby improving the connection efficiency of the related pipeline assembly.

[0015] In this embodiment, by fitting the second engaging structure 1131 and the first engaging structure 1121 with a clearance, the first pipe joint 111 and the second pipe joint 112 can approach or separate from each other, and based on this clearance, the assembly tolerance of the related pipeline assembly adopting the pipe connection structure 011 can be absorbed or supplemented, thereby reducing the assembly accuracy requirements of the related pipeline assembly. As a result, the pipe connection design of the related pipeline assembly is simplified, and the reliability of the related pipeline assembly can be improved.

[0016] Here, the related pipeline assembly includes, but is not limited to, a thermal management assembly.

[0017] Referring to FIGS. 2 to 5, in one embodiment, the first engaging structure 1121 is a first boss. As shown in FIG. 2, FIG. 2 is a structural diagram of the second pipe joint 112 provided in an embodiment of the present disclosure. The second engaging structure 1131 is a second boss. As shown in FIG. 3, FIG. 3 is a structural diagram of the first pipe joint 111 provided in an embodiment of the present disclosure. The second boss is on the side away from the first end of the first boss. As shown in FIG. 4, FIG. 4 is a side view of the pipe connection structure 011 provided in an embodiment of the present disclosure. Here, one end where the second pipe joint 112 and the first pipe joint 111 are inserted and connected is defined as the first end. The second pipe joint 112 includes a first end face 1122 at the first end. The position-limiting structure 113 includes a first surface 1132 installed opposite to the first end face 1122. The distance between the side of the second boss close to the first boss and the first surface 1132 is denoted as L1, and the distance between the side of the first boss close to the second boss and the first end face 1122 is denoted as L2, satisfying L1 > L2. As shown in FIG. 5, FIG. 5 is a cross-sectional view taken along the line A-A in FIG. 4.

[0018] It can be understood that L1 - L2 = ΔL, and ΔL is the maximum assembly tolerance that the pipe connection structure 011 can absorb or supplement.

[0019] Here, when the first end face 1122 abuts against the first surface 1132, it becomes the maximum assembly tolerance to be absorbed. At this time, the engagement structure between the second pipe joint 112 and the first pipe joint 111 is as shown in FIG. 5. When the first boss abuts against the second boss, it becomes the maximum assembly tolerance to be supplemented. At this time, the engagement structure between the second pipe joint 112 and the first pipe joint 111 is as shown in FIG. 6, and FIG. 6 is a structural diagram of the second pipe joint 112 and the first pipe joint 111 engaged with each other provided in an embodiment of the present disclosure.

[0020] Exemplarily, the diameter of the engagement portion between the first pipe joint 111 and the second pipe joint 112 is D, and 10%D≦△L≦20%D is satisfied. As can be understood, △L includes, but is not limited to, 10%D, 12%D, 13%D, 15%D, 17%D, 18%D, 20%D. For example, when D is 18 mm, △L includes, but is not limited to, 1.8 mm, 2 mm, 2.4 mm, 2.5 mm, 2.7 mm, 3.1 mm, 3.6 mm.

[0021] In this embodiment, by the above installation, the press fit between the second engagement structure 1131 and the first engagement structure 1121 can be realized, and it is not necessary to use either of them as the groove body. Furthermore, the structural strength of the pipe connection structure 011 can be increased with a certain pipe wall thickness, and finally the reliability of the pipe connection structure 011 can be increased.

[0022] Referring to FIG. 7, FIG. 7 is an enlarged view of part B in FIG. 2. In one embodiment, the surface of the first boss away from the second pipe joint 112 is the first conical surface 11211, and the first conical surface 11211 has a small-diameter edge portion (hereinafter referred to as the small-diameter end of the first conical surface 11211, while the large-diameter edge portion is the large-diameter end of the first conical surface 11211) facing the first end.

[0023] When the first pipe joint 111 is inserted and connected to the second pipe joint 112, it can be understood that the second boss abuts against the first conical surface 11211. As the first pipe joint 111 moves towards the second pipe joint 112, the second boss moves from the small-diameter end of the first conical surface 11211 to the large-diameter end along the first conical surface 11211, and the insertion connection between the first pipe joint 111 and the second pipe joint 112 is completed until the second boss moves to the side away from the first end face 1122 of the first boss.

[0024] In this embodiment, by providing the first conical surface 11211, when the first pipe joint 111 and the second pipe joint 112 are inserted and connected, the second boss can be guided based on the first conical surface 11211, and furthermore, the inhibition of the second boss by the first boss can be reduced. Thereby, the insertion connection efficiency between the first pipe joint 111 and the second pipe joint 112 can be improved.

[0025] Referring to FIG. 8, FIG. 8 is a structural diagram of the position-limiting structure 113 provided in the embodiment of the present disclosure connected to the second boss. In one embodiment, the second boss includes a first side wall 11311 facing the outer peripheral surface of the second pipe joint 112, and the side of the first side wall 11311 away from the first boss is the second conical surface 113111, and the small-diameter edge of the second conical surface 113111 (hereinafter referred to as the small-diameter end of the first conical surface 11211, while the large-diameter edge is the large-diameter end of the first conical surface 11211) faces the first boss.

[0026] When the first pipe joint 111 is inserted and connected to the second pipe joint 112, it can be understood that the first boss abuts against the second conical surface 113111. As the first pipe joint 111 moves towards the second pipe joint 112, the first boss moves from the large-diameter end of the second conical surface 113111 to the small-diameter end along the second conical surface 113111, and the insertion connection between the first pipe joint 111 and the second pipe joint 112 is completed until the second boss moves to the side away from the first end face 1122 of the first boss.

[0027] In this embodiment, by providing the second conical surface 113111, when the first pipe joint 111 and the second pipe joint 112 are inserted and connected, the second boss can be guided based on the second conical surface 113111, and furthermore, the inhibition of the first boss by the second boss can be reduced. Thereby, the insertion and connection efficiency between the first pipe joint 111 and the second pipe joint 112 can be improved.

[0028] Referring to FIG. 7, in one embodiment, a receiving groove 1123 is provided on the outer peripheral surface of the second pipe joint 112, and the receiving groove 1123 is provided close to the first boss and on the side of the first boss close to the second boss.

[0029] When the first pipe joint 111 is inserted and connected to the second pipe joint 112, it can be understood that the second boss abuts against the first conical surface 11211. As the first pipe joint 111 and the second pipe joint 112 move towards each other, the second boss can push the first boss and deform it towards the receiving groove 1123, thereby reducing the diameter of the first boss. When the second boss moves to the side away from the first end face 1122 of the first boss, the first boss returns to its original state so as to be snap-fitted with the second boss.

[0030] In this embodiment, by the above arrangement, when the first pipe joint 111 and the second pipe joint 112 are inserted and connected, the second boss can deform the first boss into the receiving groove 1123, thereby reducing the diameter of the first boss. Furthermore, the inhibition of the first boss by the second boss can be further reduced so that the second boss can move more smoothly to the side away from the first end face 1122 of the first boss. Thereby, the insertion and connection efficiency between the first pipe joint 111 and the second pipe joint 112 can be improved.

[0031] Referring to FIG. 2, in one embodiment, the first boss is installed to extend along the peripheral edge of the second pipe joint 112.

[0032] Exemplarily, the first boss is formed in an annular structure extending along the peripheral edge of the second pipe joint 112.

[0033] In this embodiment, due to the above installation, the first boss can be snap-fitted with the second boss along the circumferential direction of the first pipe joint 111 or the second pipe joint 112, and the reliability of the pipe connection structure 011 can be enhanced.

[0034] As shown in FIG. 8, in one embodiment, along the insertion connection direction, the position limiting structure 113 includes a first section 1133, a bending portion 1134, and a second section 1135 that are sequentially connected. One end of the first section 1133 away from the bending portion 1134 is connected to the first pipe joint 111, and one end of the second section 1135 away from the bending portion 1134 is connected to the second engaging structure 1131. Along the radial direction of the first pipe joint 111, one end of the bending portion 1134 close to the first pipe joint 111 and one end away from the first pipe joint 111 are connected to the first section 1133 and the second section 1135, respectively.

[0035] In this embodiment, due to the above installation, when the second boss can move from the small-diameter end to the large-diameter end of the first conical surface 11211 along the first conical surface 11211, the pressing force of the first boss on the second boss acts on the bending portion 1134 through the second segment 1135, so that the second boss is more likely to move radially outward based on the bending 1134. Furthermore, the inhibition between the first boss and the second boss can be further reduced so that the second boss can move more smoothly on the side away from the first end surface 1122 of the first boss. Thereby, the insertion connection efficiency between the first pipe joint 111 and the second pipe joint 112 can be improved.

[0036] In one embodiment, the position limiting structure 113 has elasticity. For example, the material of the position limiting structure 113 is plastic, or the position limiting structure 113 is an elastic metal piece.

[0037] Exemplarily, when the material of the position limiting structure 113 is plastic, the position limiting structure 113 may be adhered or integrally formed with the first pipe joint 111. When the position limiting structure 113 is an elastic metal piece, the position limiting structure 113 may be adhered, welded, or integrally formed with the first pipe joint 111.

[0038] In this embodiment, due to the above installation, when the first pipe joint 111 and the second pipe joint 112 are inserted and connected, on the one hand, when the second boss is moved outward along the radial direction based on the elasticity of the position limiting structure 113, and further, the inhibition between the first boss and the second boss can be further reduced so that the second boss can move more smoothly on the side away from the first end face 1122 of the first boss. Thereby, the insertion and connection efficiency between the first pipe joint 111 and the second pipe joint 112 can be improved. On the other hand, after the insertion and connection between the first pipe joint 111 and the second pipe joint 112 is completed, the position limiting structure 113 can return to its original state based on its own elasticity, thereby avoiding damage to the position limiting structure 113, and further enhancing the reliability of the insertion and connection between the first pipe joint 111 and the second pipe joint 112.

[0039] Referring to FIGS. 5 and 6, in one embodiment, the pipe connection structure 011 further includes a sealing ring 114, and the sealing ring 114 is installed between the first pipe joint 111 and the second pipe joint 112.

[0040] In order to realize the sealed connection between the first pipe joint 111 and the second pipe joint 112, it is understood that the sealing ring 114 is in a radially pressed state so that its inner peripheral surface and outer peripheral surface are sealingly bonded to the first pipe joint 111 and the second pipe joint 112.

[0041] Exemplarily, a mounting groove 1111 is installed on the outer peripheral surface of the first pipe joint 111, the sealing ring 114 is installed in the mounting groove 1111, and the outer peripheral surface of the sealing ring 114 is sealingly engaged with the inner peripheral surface of the second pipe joint 112. Also, the sealing ring 114 is an O-ring sealing ring 114.

[0042] In one embodiment, both the material of the first pipe joint 111 and the material of the second pipe joint 112 are metals.

[0043] For example, the first pipe joint 111 and the second pipe joint 112 include, but are not limited to, copper pipe joints, alloy pipe joints, and stainless steel pipe joints.

[0044] In this embodiment, by the above installation, the strength of the first pipe joint 111 and the second pipe joint 112 can be increased, thereby increasing the strength of the pipe connection structure 011, and further increasing the reliability of the related pipeline assembly adopting the pipe connection structure 011.

[0045] Referring to FIG. 9, FIG. 9 is a structural diagram of a thermal management assembly 001 provided by an embodiment of the present disclosure. Correspondingly, an embodiment of the present disclosure provides a thermal management assembly 011. The thermal management assembly 011 includes a first main pipeline 012, a second main pipeline 013, a thermal management component 014, and the pipe connection structure 011. A flow path for circulating a heat exchange medium is installed in the thermal management component 014, and an inlet of the flow path and an outlet of the flow path are a first port 141 and a second port 142 respectively. Here, one end of the first main pipeline 012 communicates with the first port 141 through one pipe connection structure 011, and one end of the second main pipeline 013 communicates with the second port 142 through another pipe connection structure 011.

[0046] It can be understood that one of the first main pipeline 012 and the second main pipeline 013 is a pipeline for sending a heat exchange medium into the flow path, and the other is a pipeline for discharging the heat exchange medium in the flow path. Correspondingly, among the first port 141 and the second port 142, one is a port through which the heat exchange medium flows into the flow path, and the other is a port through which the heat exchange medium flows out of the flow path.

[0047] Exemplarily, the first main pipeline 012 is a pipeline for sending a heat exchange medium into the flow path, and the second main pipeline 013 is a pipeline for discharging the heat exchange medium in the flow path. Correspondingly, the first port 141 is a port through which the heat exchange medium flows into the flow path, and the second port 142 is a port through which the heat exchange medium flows out of the flow path.

[0048] In this embodiment, by adopting the above-mentioned pipe connection structure 011, the engagement gap between the second engagement structure 1131 and the first engagement structure 1121 can be utilized to enable the first pipe joint 111 and the second pipe joint 112 to approach or separate from each other, and the assembly tolerance of the heat management assembly 001 can be absorbed or supplemented, thereby reducing the assembly accuracy requirements for the heat management assembly 001. As a result, the pipe connection design of the heat management assembly is simplified, and the reliability of the heat management assembly can be enhanced.

[0049] Referring to FIG. 10, FIG. 10 is an enlarged view of part C in FIG. 9. In one embodiment, the first main pipeline 012 includes a first flow port, the first main pipeline 012 communicates with the first port 141 through the first flow port, and both the first flow port and the first port 141 are two in number, and the two first flow ports and the two first ports 141 are installed in a one-to-one correspondence. Specifically, two first flow ports are installed in the first main pipeline 012, two first ports 141 are installed in the heat management component 014, one first flow port communicates with one first port 141, and the other first flow port communicates with another first port 141.

[0050] It can be understood that the two first flow ports are communicated through one pipe connection structure 011 and the corresponding first port 141 respectively. Correspondingly, the first main pipeline 012 is a tee pipeline having three pipe ports, two of which communicate with two first ports 141 respectively, and the third pipe port is used for the inflow of liquid.

[0051] In this embodiment, by installing two first flow ports and two first ports 141, on the one hand, the flow uniformity of the heat exchange medium in the heat management component 014 can be enhanced, thereby improving the problem of local temperature unevenness of the heat management component 014 and further enhancing the heat dissipation effect. On the other hand, even if one of them fails, the other can still operate normally, thereby enhancing the reliability and stability of the heat management assembly 001.

[0052] Referring to FIG. 10, in one embodiment, a pipe connection structure 011 is connected at a location in the first main pipeline 012 and between two first flow ports.

[0053] In this embodiment, by installing the pipe connection structure 011 between the two first flow ports, an engagement gap is provided between the two first flow ports, and based on this gap, the assembly tolerance between the two first ports 141 can be absorbed or compensated, and furthermore, the assembly accuracy requirements of the thermal management assembly 001 can be reduced.

[0054] Specifically, the axis of the pipe connection structure 011 located between the two first flow ports is perpendicular to the axis of the pipe connection structure 011 between the first flow port and the first port 141. Thereby, the pipe connection structure 011 between the two first flow ports and the pipe connection structure 011 between the first flow port and the first port 141 can respectively absorb or compensate the assembly tolerances in two directions, and furthermore, the assembly accuracy requirements of the thermal management assembly 001 can be reduced.

[0055] Correspondingly, the connection method between the second main pipeline 013 and the second port 142 is the same as the connection method between the first main pipeline 012 and the first port 141. Specifically, the second main pipeline 013 includes a second flow port, the second main pipeline 013 is communicated with the second port 142 through the second flow port, there are two second flow ports and two second ports 142, and the two second flow ports and the two second ports 142 are installed in a one-to-one correspondence. Specifically, two second flow ports are installed in the second main pipeline 013, two second ports 142 are installed in the thermal management component 014, one second flow port is communicated with one second port 142, and the other second flow port is communicated with another second port 142.

[0056] In the second main pipeline 013, a pipe connection structure 011 is connected at a location between two second flow ports. Correspondingly, the second main pipeline 013 is a tee pipeline having three pipe ports, two of which communicate with two second ports 142 respectively, and the third pipe port is used for liquid discharge.

[0057] In this embodiment, by providing two second flow ports and two second ports 142, on the one hand, the flow uniformity of the heat exchange medium in the heat management component 014 can be enhanced, thereby improving the problem of local temperature unevenness of the heat management component 014 and further enhancing the heat dissipation effect. On the other hand, even if one of them fails, the other can still operate normally, thereby enhancing the reliability and stability of the heat management assembly 001.

[0058] In one embodiment, a plurality of flow paths are provided in the heat management component 014. Let the area of the fluid cross-section of the flow path be area B. At least a part of the lengths of the plurality of flow paths are different, and area B has a positive correlation with the length of the flow path corresponding to area B.

[0059] The flow path is understood to be used for supplying a heat exchange medium. The fluid cross-section refers to a cross-section defined by the flow path and perpendicular to the fluid flow direction. The smaller the area B of the fluid cross-section of the flow path, the greater the flow path resistance to the fluid in the flow path. In this embodiment, the cross-sectional areas of flow paths with different lengths may be the same or different. When the cross-sectional areas of flow paths with different lengths are different, each flow path may be an equal-diameter flow path, and the cross-section at any position of each flow path is the area of the fluid cross-section, that is. When the cross-sectional areas of flow paths with different lengths are the same, a flow interruption site is installed in the flow path, and the area of the fluid cross-section of the flow interruption site of each flow path is the area B. Although the cross-sectional areas of flow paths with different lengths are different, it is necessary to adjust the size of the cross-section of each flow path to obtain the required area of the fluid cross-section for elements such as the fluid viscosity of the heat exchange medium, the flow path structure shape, the flow path wall roughness, and the flow velocity. The design cost and the processing and manufacturing cost are relatively high. When the cross-sectional areas of flow paths with different lengths are the same, for the above elements, the area of the fluid cross-section of the flow interruption site may be adjusted adaptively, and the remaining parts of the flow path can be designed and produced in mass production to control the design cost and the processing and manufacturing cost.

[0060] Here, the first ports 141 of the plurality of flow paths serve as ports for liquid inflow, and the second ports 142 serve as ports for liquid discharge. The first ports 141 of the plurality of flow paths are connected in parallel to the first main pipeline, and the second ports 142 of the plurality of flow paths are connected in parallel to the second main pipeline. When the first main pipeline 012 has one first flow port, the first port 141 of one of the flow paths is further communicated with the first flow port. When the first main pipeline 012 has two first flow ports, the first port 141 of one of the flow paths close to the first main pipeline 012 among the plurality of flow paths is communicated with one first flow port, and the first port 141 of another flow path close to the first main pipeline 012 among the plurality of flow paths is communicated with another first flow port. When the second main pipeline 013 has one second flow port, the second port 142 of one of the flow paths is further communicated with the second flow port. When the second main pipeline 013 has two second flow ports, the second port 142 of one of the flow paths close to the second main pipeline 013 among the plurality of flow paths is communicated with one second flow port, and the second port 142 of another flow path close to the second main pipeline 013 among the plurality of flow paths is communicated with another second flow port.

[0061] By adopting parallel connection instead of series connection, the flow of the heat exchange medium can be made smoother. On the other hand, the temperature difference between the first port 141 and the second port 142 can be reduced, thereby enhancing the heat management effect on the battery cells away from the liquid inflow port.

[0062] Also, when the heat management component 014 is used for a battery, the heat management component 014 may be the entire one plate structure in which a plurality of flow paths are installed. At this time, the heat management component 014 is mainly arranged at one end of the battery module and is thermally coupled to the end face of the battery cell to thermally manage the battery cell. The heat management component 014 can also adopt a plurality of plate bodies, and one flow path is installed on each plate body. At this time, the plate body may be installed at one end of the battery module or between the rows of battery cells. The plate body is thermally coupled to the circumferential surface of the battery cell to thermally manage the battery cell.

[0063] In this embodiment, by making the area of the fluid cross-section of the flow path have a positive correlation with the length of the flow path, a shorter flow path has more increased flow path resistance, thereby reducing the difference in flow path resistance between each flow path, and further improving the uniformity of the flow rate of each flow path. Thereby, the thermal management assembly 001 can improve the uniformity of the thermal management effect of the battery cell.

[0064] In one embodiment, the flow path includes a flow path body 143 and a water stop structure 144 installed on the flow path body 143. Let the area of the fluid cross-section of the flow path body 143 be area A, the areas A of a plurality of flow paths are equal, area B is the area of the fluid cross-section of the water stop structure 144, area A ≥ area B is satisfied, and both ends of the flow path body 143 are the first port 141 and the second port 142 respectively.

[0065] The water stop structure 144 may be installed at the end of the flow path body 143 or in the middle of the flow path body 143. As shown in FIG. 11, FIG. 11 is a structural diagram of the flow path part provided in the embodiment of the present disclosure. Taking the cross-section of the flow path as circular as an example, in FIG. 11, the radius of the water stop structure 144 is r, and the area B of the cross-section of the water stop structure 144 is area B = πr 2 where, the radius of the flow path body 143 is R, and the area A of the fluid cross-section of the flow path body 143 is area A = πR 2 where. Here, R ≥ r, realizing area A ≥ area B. The smaller the area B of the fluid cross-section of the water stop structure 144, the greater the flow path resistance of the water stop structure 144 to the fluid.

[0066] In this embodiment, by installing a water stop structure 144 with the size of the area of the fluid cross-section in the flow path having a positive correlation with the length of the flow path, on the one hand, a shorter flow path can have more increased flow path resistance, thereby reducing the difference in flow path resistance between each flow path and further improving the uniformity of the flow rate of each flow path. On the other hand, by only adjusting the area B of the fluid cross-section of each water stop structure 144 to adjust the flow path resistance of the flow path, the structure of the flow path body 143 remains unchanged, and mass-produced design and production are possible, thereby controlling the design cost and processing and manufacturing costs.

[0067] In one embodiment, the heat management component 014 includes a plurality of heat management plates 145, and the plurality of flow channels and the plurality of heat management plates 145 are installed in a one-to-one correspondence.

[0068] It should be understood that the heat management assembly is applied to the battery module. The battery module includes a plurality of battery cell rows installed sequentially. The plurality of heat management plates 145 are installed sequentially along the arrangement direction of the plurality of battery cell rows, and a gap for arranging a battery cell row is formed between two adjacent heat management plates 145. When the battery cell is a cylindrical battery cell, the heat management plate 145 is a serpentine plate, and its surface is bonded to the battery cell.

[0069] In this embodiment, by installing the heat management component 014 in the structure of the plurality of heat management plates 145, on the one hand, the heat management plate 145 can be installed between two adjacent battery cell rows, thereby increasing the contact surface between the heat management assembly and the battery cells, improving the heat management efficiency of the heat management component 014, and the heat management plate 145 can be used as a support positioning structure for the battery cells instead of the battery cell holder, simplifying the number of parts of the battery. On the other hand, one heat management plate 145 can be maintained individually, thereby enhancing the convenience of maintenance and reducing the maintenance cost.

[0070] Referring to FIG. 12, FIG. 12 is a structural diagram of a heat management assembly 145 provided by an embodiment of the present disclosure. In one embodiment, the heat management plate 145 includes a plate body 1451 and a first end plate 1452, and a first slot 14521 is provided in the first end plate 1452. As shown in FIG. 13, FIG. 13 is a structural diagram of the first end plate 1452 provided by an embodiment of the present disclosure. The first end of the plate body 1451 is sealingly inserted and connected to the first slot 14521. The flow path body 143 includes an inflow passage 1431 and an outflow passage 1432. The inflow passage 1431 and the outflow passage 1432 are installed in parallel with the plate body 1451. One end of the inflow passage 1431 and one end of the outflow passage 1432 are both communicated with the first slot 14521. The other end of the inflow passage 1431 and the other end of the outflow passage 1432 are the first port 141 and the second port 142 respectively. A water stop wall 14511 is installed at the first end of the plate body 1451. The water stop wall 14511 is between the inflow passage 1431 and the outflow passage 1432. A water stop structure 144 is defined by the water stop wall 14511 and the inner wall of the first slot 14521. As shown in FIGS. 14 and 15, FIG. 14 is a top view of the heat management plate 145 provided by an embodiment of the present disclosure, and FIG. 15 is a cross-sectional view taken along line D-D in FIG. 14.

[0071] It can be understood that the water stop wall 14511 and the inner wall of the first slot 14521 surround an annular passage, and the annular passage is the water stop structure 144 and is located between the inflow passage 1431 and the outflow passage 1432. The heat exchange medium in the inflow passage 1431 flows through the annular passage and then enters the outflow passage 1432. Further, by adjusting the dimensions of the annular passage, the area B of the fluid cross-section of the water stop structure 144 is adjusted, so that the magnitude of the area B has a positive correlation with the length of the flow path corresponding to the magnitude of the area B, thereby completing the adjustment of the flow path resistance of each flow path.

[0072] Exemplarily, both the plate body 1451 and the first end plate 1452 are metal parts with good thermal conductivity such as aluminum. After the plate body 1451 and the first end plate 1452 are inserted and connected, the fixation and sealing between the plate body 1451 and the first end plate 1452 are realized by welding.

[0073] In this embodiment, by the above installation, the water stop structure 144 is installed at one end of the heat management plate 145, and the water stop structure 144 is formed on the mutually facing surfaces between the first end plate 1452 and the plate body 1451. On the one hand, unnecessary processing complexity can be avoided, the forming method of the water stop structure 144 can be simplified, and the manufacturing efficiency can be further improved. On the other hand, for elements such as the fluid viscosity of different heat exchange media, the shape of the flow path structure, the roughness of the flow path wall surface, and the flow velocity, the water stop structure 144 can be adjusted more conveniently, thereby improving the cost of fluctuations in the heat management assembly structure.

[0074] Also, a plurality of partition plates 14512 are installed in both the inflow passage 1431 and the outflow passage 1432 along a direction perpendicular to the flow of the fluid. In the inflow passage 1431, the partition plate 14512 divides the inflow passage 1431 into a plurality of sub-passages, and in the outflow passage 1432, the partition plate 14512 divides the outflow passage 1432 into a plurality of sub-passages. In this way, on the one hand, the heat exchange medium can be divided into a plurality of thin streams of flow, and the smoothness of the flow of the heat exchange medium can be improved by ensuring that the two adjacent thin streams do not interfere with each other. On the other hand, the strength of the plate body 1451 can be increased, thereby enhancing the impact resistance of the plate body 1451.

[0075] Referring to FIG. 16, FIG. 16 is an enlarged view of part E in FIG. 15. In one embodiment, there is a gap d between the water stop wall 14511 and the groove bottom of the first slot 14521, and for different heat management plates 145, the gap d has a positive correlation with the length of the flow path corresponding to the gap d. In FIG. 16, the heat exchange medium flows into one side of the first slot 14521 from the inflow passage 1431, then passes through the water stop wall 14511 and flows into the other side of the first slot 14521, and accordingly flows into the outflow passage 1432.

[0076] The larger the distance d between the water stop wall 14511 and the groove bottom of the first slot 14521, and the larger the area B of the fluid cross-section of the water stop structure 144, the smaller the flow path resistance of the water stop structure 144 to the fluid. Conversely, the smaller the area B of the fluid cross-section of the water stop structure 144, the larger the flow path resistance of the water stop structure 144 to the fluid. It can be understood that by adjusting the distance d between the water stop wall 14511 and the groove bottom of the first slot 14521, a desired area B can be obtained, and further adjustment of the flow path resistance of flow paths with different lengths can be realized, and finally the consistency of the flow path resistance of each flow path is improved.

[0077] Here, in combination with FIGS. 13 and 16, the area B of the fluid cross-section of the water stop structure 144 will be described below. The water stop structure 144 is composed of the water stop wall 14511, the groove bottom of the first slot 14521, and the groove wall of the first slot 14521 surrounded and combined at the location where it is between the groove bottom and the blocking wall 14511. Taking the case where the fluid cross-section of the water stop structure 144 is rectangular as an example, that is, the two side groove walls of the first slot 14521 are parallel to each other, the water stop wall 14511 and the groove bottom of the first slot 14521 are parallel to each other, and the water stop wall 14511 is perpendicular to the groove wall of the first slot 14521. In FIG. 13, the width dimension of the first slot 14521 is w, that is, the width dimension of the fluid cross-section of the water stop structure 144 is w. In FIG. 16, the distance between the water stop wall 14511 and the groove bottom of the first slot 14521 is d, that is, the long side dimension of the fluid cross-section of the water stop structure 144 is d. And since both the long side dimension and the width dimension are perpendicular to the direction of the fluid flowing through the water stop wall 14511 (refer to FIG. 13, in FIG. 13, the direction of the fluid flowing through the water stop wall 14511 is from left to right), the cross-section with the long side dimension and the width dimension is the fluid cross-section of the water stop structure 144. Correspondingly, the area B of the fluid cross-section of the water stop structure 144 is area B = wd.

[0078] As can be seen from the above, the area B of the fluid cross-section has a positive correlation with the interval d, and the area B of the fluid cross-section has a positive correlation with the length of the flow path corresponding to the area B. Therefore, the interval d has a positive correlation with the length of the flow path corresponding to the interval d. Thus, on the premise that the depth at which the plate body 1451 is inserted into the first slot 14521 is constant, for flow paths of different lengths, the depth of the first slot 14521 can be adjusted accordingly. On the premise that the depth of the first slot 14521 is constant, the interval d can also be adjusted by adjusting the depth at which the plate body 1451 is inserted into the first slot 14521. Thereby, by adjusting the interval d between the water stop wall 14511 and the groove bottom of the first slot 14521, the long side dimension of the fluid cross-section of the desired water stop structure 144 can be obtained, and furthermore, the area of the fluid cross-section of the water stop structure 144 can be adjusted. Thus, by adjusting the depth at which the plate body 1451 is inserted into the first slot 14521, the adjustment of the flow path resistance for flow paths of different lengths can be realized, and the consistency of the flow path resistance of each flow path can be enhanced.

[0079] Exemplarily, the length dimension L of the flow path is L1, L2,..., L in descending order n respectively. In the flow path with length L1, the interval between the water stop wall 14511 and the groove bottom of the first slot 14521 is d1. In the flow path with length L2, the interval between the water stop wall 14511 and the groove bottom of the first slot 14521 is d2 = d1 + δ1,..., and in the flow path with length n L, the interval between the water stop wall 14511 and the groove bottom of the first slot 14521 is d n = d1 + δ n―1 respectively. Here, the value of δ is obtained by simulation based on factors such as the fluid viscosity of different heat exchange media, the shape of the flow path structure, the roughness of the flow path wall surface, and the flow velocity.

[0080] Also, an example will be described in which the inflow passage 1431 and the outflow passage 1432 are installed in parallel, their lengths are the same, and the length of the inflow passage 1431 has three types of dimensions. The three types of dimensions of the length of the inflow passage 1431 are 56 mm, 104 mm, and 124 mm in this order. Specifically, in the inflow passage 1431 with a length of 56 mm, d is 0.6 mm. In the inflow passage 1431 with a length of 104 mm, d is 2.6 mm. In the inflow passage 1431 with a length of 124 mm, d is 4.6 mm.

[0081] In this embodiment, by adjusting the distance d between the water stop wall 14511 and the groove bottom of the first slot 14521, the adjustment of the area B of the fluid cross-section of the water stop structure 144 is realized, the water stop structure 144 is simplified, the adjustment is convenient, and it is advantageous for controlling the manufacturing cost of the thermal management assembly.

[0082] Referring to FIG. 17, FIG. 17 is a structural diagram of the battery pack 002 provided by the embodiment of the present disclosure. Correspondingly, the embodiment of the present application further provides a battery pack 002. The battery pack 002 includes a battery module. The battery module includes a module box 021, battery cells, and the thermal management assembly 001 described above. The module box 021 includes a mounting chamber, there are a plurality of battery cells, the plurality of battery cells are installed in the mounting chamber, the thermal management component 014 is installed in the mounting chamber, and the thermal management component 014 is thermally coupled to the plurality of battery cells.

[0083] In this embodiment, by adopting the thermal management assembly 001 described above, due to the engagement gap between the second engagement structure 1131 and the first engagement structure 1121, the first pipe joint 111 and the second pipe joint 112 can approach or separate from each other, and the assembly tolerance of the thermal management assembly 001 can be absorbed or supplemented, thereby reducing the assembly accuracy requirement of the thermal management assembly 001. Thereby, on the one hand, the operability of the assembly of the battery pack 002 can be improved. On the other hand, the reliability of the battery pack 002 can be improved.

[0084] Referring to FIG. 18, FIG. 18 is a structural diagram of another battery pack 002 provided in an embodiment of the present disclosure. In one embodiment, there are a plurality of battery modules, the first main pipelines 012 of the plurality of battery modules are connected in parallel, and the second main pipelines 013 of the plurality of battery modules are connected in parallel. Specifically, the plurality of battery modules are sequentially stacked and installed along a first direction. Along the first direction, the first main pipelines 012 of the plurality of battery modules are sequentially connected in parallel, and the second main pipelines 013 of the plurality of battery modules are sequentially connected in parallel.

[0085] Here, the first direction may be a direction parallel to the axial direction of the battery cell or a direction forming an angle with the axial direction of the battery cell. The first direction is specifically designed based on the installation space of the battery pack 002 and is not limited here.

[0086] Also, the pipelines of the inflow passage of the heat exchange medium of the heat management assembly 001 of each battery module and the pipelines of the inflow passage are both installed on the same side of the battery pack 002, so that the pipelines of the heat management assembly 001 of each battery module overlap in the first direction, and the size of the battery pack 002 can be reduced.

[0087] In this embodiment, by connecting the first main pipelines 012 and the second main pipelines 013 of the plurality of battery modules in parallel respectively, the heat exchange medium flows in and out synchronously in each heat management assembly 001, so that the inflow of each heat management assembly 001 is sufficient and uniform, and the temperature consistency of each battery module can be improved.

Description of Reference Numerals

[0088] 001: Thermal management assembly, 011: Pipe connection structure, 111: First pipe joint, 1111: Mounting groove, 112: Second pipe joint, 1121: First engagement structure, 11211: First conical surface, 1122: First end face, 1123: Receiving groove, 113: Position limiting structure, 1131: Second engagement structure, 11311: First side wall, 113111: Second conical surface, 1132: First surface, 1133: First section, 1134: Bending portion, 1135: Second section, 114: Seal ring, 012: First main pipeline, 013: Second main pipeline, 014: Thermal management component, 141: First port, 142: Second port, 143: Flow path body, 1431: Inflow passage, 1432: Outflow passage, 144: Water stop structure, 145: Thermal management plate, 1451: Plate body, 14511: Water stop wall, 1452: First end plate, 14521: First slot, 14512: Partition plate, 002: Battery pack, 021: Module box

Claims

1. A pipe connection structure, comprising: a first pipe fitting (111), a second pipe fitting (112), and a position limiting structure (113); the second pipe fitting (112) includes a first end, the first end is inserted and connected to one end of the first pipe fitting (111), and a first engaging structure (1121) is installed on the outer surface of the second pipe fitting (112); one end of the position limiting structure (113) is connected to the outer peripheral surface of the first pipe fitting (111), and a second engaging structure (1131) is installed at the other end; along the direction of the insertion connection, the second engaging structure (1131) abuts against the first engaging structure (1121), and along the direction of the insertion connection, the second engaging structure (1131) is loosely fitted with the first engaging structure (1121). A pipe connection structure characterized by this.

2. The first engaging structure (1121) is a first boss, the second engaging structure (1131) is a second boss, and the second boss is on the side away from the first end of the first boss; The second pipe joint (112) has a first end face (1122) at the first end, and the position limiting structure (113) has a first surface (1132) installed opposite to the first end face (1122). The distance between the side of the second boss close to the first boss and the first surface (1132) is L １ is set, and the distance between the side of the first boss close to the second boss and the first end face (1122) is L ２ is set, and L １ > L ２ The pipe connection structure according to claim 1, characterized in that it satisfies

3. The surface of the first boss away from the second pipe fitting (112) is a first conical surface (11211), and the small-diameter end of the first conical surface (11211) faces the first end. The pipe connection structure according to claim 2, characterized by this.

4. The second boss has a first side wall (11311) facing the outer peripheral surface of the second pipe fitting (112), the side of the first side wall (11311) away from the first boss is a second conical surface (113111), and the small-diameter end of the second conical surface (113111) faces the first boss. The pipe connection structure according to claim 2, characterized by this.

5. A receiving groove (1123) is installed on the outer peripheral surface of the second pipe fitting (112), the receiving groove (1123) is installed close to the first boss, and is on the side of the first boss close to the second boss. The pipe connection structure according to claim 2, characterized by this.

6. The first boss is installed so as to extend along the peripheral edge of the second pipe fitting (112). The pipe connection structure according to claim 2, characterized by this.

7. The first boss extends so as to form an annular structure along the peripheral edge of the second pipe fitting (112). The pipe connection structure according to claim 6, characterized by this.

8. L1 - L2 = ΔL, where D is the diameter of the engagement portion between the first pipe joint (111) and the second pipe joint (112), and the pipe connection structure according to claim 2, characterized in that 10% D ≤ ΔL ≤ 20% D.

9. One of the first engagement structure (1121) and the second engagement structure (1131) is a groove body, and the other is a convex member. At least a part of the convex member is in the groove body. Along the direction of the insertion connection, the convex member abuts against the groove body, and along the direction of the insertion connection, the convex member is loosely fitted with the groove body. The pipe connection structure according to claim 1, characterized in that.

10. Along the direction of the insertion connection, the position limiting structure (113) includes a first section (1133), a bending portion (1134), and a second section (1135) connected in sequence. One end of the first section (1133) away from the bending portion (1134) is connected to the first pipe joint (111), and one end of the second section (1135) away from the bending portion (1134) is connected to the second engagement structure (1131). Along the radial direction of the first pipe joint (111), one end of the bending portion (1134) close to the first pipe joint (111) and one end away from the first pipe joint (111) are respectively connected to the first section (1133) and the second section (1135). The pipe connection structure according to claim 1, characterized in that.

11. The position limiting structure (113) has elasticity. The pipe connection structure according to claim 1, characterized in that.

12. The material of the position limiting structure (113) is plastic. The pipe connection structure according to claim 11, characterized in that.

13. The pipe connection structure (011) further includes a sealing ring (114), and the pipe connection structure according to claim 1, characterized in that the sealing ring (114) is installed between the first pipe joint (111) and the second pipe joint (112).

14. An attachment groove (1111) is installed on the outer peripheral surface of the first pipe joint (111), the sealing ring (114) is installed in the attachment groove (1111), and the outer peripheral surface of the sealing ring (114) is sealingly engaged with the inner peripheral surface of the second pipe joint (112). The pipe connection structure according to claim 13, characterized in that.

15. The pipe connection structure according to claim 1, wherein the material of the first pipe joint (111) and the material of the second pipe joint (112) are both metals.

16. A thermal management assembly, including a first main pipeline (012), a second main pipeline (013), and a thermal management component (014), wherein one or more flow paths for circulating a heat exchange medium are provided in the thermal management component (014), and an inlet and an outlet of the flow path are a first port (141) and a second port (142), respectively, wherein the thermal management assembly (001) further includes the pipe connection structure (011) according to any one of claims 1 to 15, wherein one end of the first main pipeline (012) is communicated with the first port (141) through one of the pipe connection structures (011), and one end of the second main pipeline (013) is communicated with the second port (142) through another pipe connection structure (011). A thermal management assembly characterized by this.

17. The first main pipeline (012) includes two first flow openings, two flow paths are provided, the two first flow openings are installed in one-to-one correspondence with the first ports (141) of the two flow paths, and the first main pipeline (012) is communicated with one corresponding first port (141) through the first flow opening. The thermal management assembly according to claim 16, characterized by this.

18. The thermal management assembly according to claim 17, wherein the pipe connection structure (011) is connected to a location between the two first flow openings in the first main pipeline (012).

19. The second main pipeline (013) includes two second flow openings, two flow paths are provided, the two second flow openings are installed in one-to-one correspondence with the second ports (142) of the two flow paths, and the second main pipeline (013) is communicated with one corresponding second port (142) through the second flow opening. The thermal management assembly according to claim 16, characterized by this.

20. The thermal management assembly according to claim 19, wherein the pipe connection structure (011) is connected to a location between the two second flow openings in the second main pipeline (013).

21. A plurality of the flow paths are provided in the heat management component (014), the area of the fluid cross-section of the flow path is defined as area B, the lengths of the plurality of flow paths are at least partially different from each other, and area B has a positive correlation with the length of the flow path corresponding to area B. The heat management assembly according to claim 16, characterized in that.

22. The flow path includes a flow path main body (143) and a blocking structure (144) installed in the flow path main body (143). The area of the fluid cross-section of the flow path main body (143) is defined as area A. The areas A of the plurality of flow paths are equal, area B is the area of the fluid cross-section of the water stop structure (144), and area A ≥ area B is satisfied. Both ends of the flow path main body (143) are a first port (141) and a second port (142) respectively. The heat management assembly according to claim 21, characterized in that.

23. The heat management component (014) includes a plurality of heat management plates (145). The plurality of flow paths and the plurality of heat management plates (145) are installed in a one-to-one correspondence. The heat management assembly according to claim 22, characterized in that.

24. The heat management plate (145) includes a plate main body (1451) and a first end plate (1452). A first slot (14521) is installed in the first end plate (1452). The first end of the plate main body (1451) is inserted and connected so as to seal with the first slot (14521). The flow path main body (143) includes an inflow passage (1431) and an outflow passage (1432). The inflow passage (1431) and the outflow passage (1432) are installed in parallel on the plate main body (1451). One end of the inflow passage (1431) and one end of the outflow passage (1432) are both communicated with the first slot (14521). The other ends of the inflow passage (1431) and the outflow passage (1432) are the first port (141) and the second port (142) respectively. A blocking wall (14511) is installed at the first end of the plate main body (1451). The blocking wall (14511) is between the inflow passage (1431) and the outflow passage (1432). The blocking structure (144) is defined by the blocking wall (14511) and the inner wall of the first slot (14521). The heat management assembly according to claim 23, characterized in that.

25. There is a gap d between the blocking wall (14511) and the bottom of the groove of the first slot (14521), and for different heat management plates (145), the gap d and the length of the flow path corresponding to the gap d have a positive correlation. The heat management assembly according to claim 24, characterized in that.

26. A battery pack including a battery module, The battery module includes a module box (021) having a mounting cavity, a plurality of battery cells installed in the mounting cavity, and a heat management assembly (001) according to claim 16. The heat management component (014) is installed in the mounting cavity and is thermally coupled to the plurality of battery cells. The battery pack is characterized in that.

27. There are a plurality of battery modules, the first main pipelines (012) of the plurality of battery modules are connected in parallel, and the second main pipelines (013) of the plurality of battery modules are connected in parallel. The battery pack according to claim 26, characterized in that.

28. The plurality of battery modules are installed so as to be stacked in order along a first direction. Along the first direction, the first main pipelines (012) of the plurality of battery modules are connected in parallel in order, and the second main pipelines (013) of the plurality of battery modules are connected in parallel in order. The battery pack according to claim 27, characterized in that.

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