Battery pack

Abstract

The utility model relates to power battery technical field especially, and it is a kind of battery pack, battery pack includes shell, liquid cooling connector assembly includes first connector and second connector, first connector is fixedly connected with shell, and the second end of first connector is towards the outside of shell;Second connector is located at the outside of shell, and second connector has docking pipe, and docking pipe is inserted into first connector from the outside of shell to inside;Second connector is provided with first clamping part, and shell or first connector is provided with the second clamping part matched with first clamping part, and first clamping part and second clamping part are clamped, and the axial locking between second connector and shell along docking pipe is locked. First clamping part and second clamping part are clamped and connected, improve installation and dismounting efficiency, simplify the connecting structure between first connector and second connector, also improve the stability of connection.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a battery pack. Background Technology

[0002] The battery cells in a battery pack generate heat during use. To ensure the safety of the battery pack, the internal temperature needs to be regulated and maintained within a certain range. Currently, this is typically achieved by using cold-rolled steel profiles, water pipes, and connectors in conjunction with a cooling medium to cool the battery cells. However, the connector structure is complex, resulting in low installation and disassembly efficiency, and the connection is unstable, easily leading to connector detachment and cooling medium leakage. Utility Model Content

[0003] This utility model provides a battery pack to solve the technical problems of complex connector structure, low installation and disassembly efficiency, and insufficient connector connection strength.

[0004] This utility model provides a battery pack, the battery pack comprising: The outer casing has a through hole, and the two ends of the through hole are respectively connected to the inner side and the outer side of the outer casing; A liquid cooling connector assembly includes a first connector and a second connector. The first connector passes through the through hole and is fixedly connected to the housing. A first end of the first connector is used to connect to the liquid cooling assembly located inside the housing, and a second end of the first connector faces the outside of the housing. The second connector is located on the outside of the housing, and the second connector has a connecting tube that is inserted into the first connector from the outside of the housing inward and is sealed to the first connector. The second connector is provided with a first snap-fit ​​portion, and the outer shell or the first connector is provided with a second snap-fit ​​portion that mates with the first snap-fit ​​portion. The first snap-fit ​​portion and the second snap-fit ​​portion snap-fit ​​together to lock the second connector and the outer shell along the axial direction of the connecting pipe.

[0005] In one embodiment of the present invention, the second connector includes a connector body and a support ring connected to the connector body. The support ring and the connecting pipe have a radial gap along the radial direction of the connecting pipe. The second end of the first connector extends into the radial gap. A sealing ring is installed on the outer wall of the connecting pipe, and the sealing ring is in a sealing fit with the inner wall of the first connector.

[0006] In one embodiment of the present invention, the first snap-fit ​​portion includes a claw disposed on the support ring, and at least two claws are arranged along the circumference of the support ring. The second snap-fit ​​portion includes a slot disposed on the outer shell, and the claw extends into the slot to lock the second connector to the outer shell. The support ring abuts against the outer side of the outer shell.

[0007] In one embodiment of the present invention, the claw includes an elastic clip and a limiting part. One end of the elastic clip is connected to the support ring, and the other end is connected to the limiting part. When the second connector is connected to the outer shell, the elastic clip extends into the slot, and the limiting part presses against the inner surface of the outer shell.

[0008] In one embodiment of the present invention, the first snap-fit ​​portion includes an elastic limiting member disposed on the second connector, the elastic limiting member being capable of generating elastic deformation along the radial direction of the connecting pipe, the second snap-fit ​​portion including a flange disposed at the second end of the first connector, the elastic limiting member abutting against the side of the flange facing the inner side of the housing, and the support ring abutting against the outer side of the housing.

[0009] In one embodiment of this utility model, the elastic limiting member is a retaining ring, the support ring has a mounting groove, the retaining ring is disposed in the mounting groove, and the mounting groove is used to limit the axial displacement of the retaining ring along the support ring.

[0010] In one embodiment of the present invention, the retaining ring includes a U-shaped retaining ring body, the retaining ring body having a first free end and a second free end disposed opposite to each other, the first free end and the second free end being bent to form an anti-disengagement portion extending axially along the connecting tube, the anti-disengagement portion being able to limit and stop against the outer periphery of the support ring to prevent the retaining ring from disengaging from the mounting groove radially along the connecting tube.

[0011] In one embodiment of this utility model, the outer periphery of the support ring is provided with at least one set of relief grooves. Each set of relief grooves includes two relief grooves located on the same side or opposite side of the mounting groove along the axial direction of the connecting pipe. The two relief grooves in each set of relief grooves correspond one-to-one with the two anti-detachment parts. The relief grooves are connected to the mounting groove. The anti-detachment parts can enter and exit the relief grooves. When the anti-detachment part enters the relief groove, the first free end and the second free end can move away from each other so that the snap ring and the flange are disengaged. When the anti-detachment part exits the relief groove, the first free end and the second free end can move closer to each other and abut against the side of the flange facing the inner side of the housing so as to lock the snap ring and the flange along the axial direction of the connecting pipe.

[0012] In one embodiment of the present invention, the two anti-detachment parts extend in the same direction, and the relief groove group includes two groups located on opposite sides of the mounting groove along the axial direction of the connecting pipe; or, the two anti-detachment parts extend in opposite directions, the relief groove group is one group, and the two relief grooves are located on opposite sides of the mounting groove along the axial direction of the connecting pipe.

[0013] In one embodiment of the present invention, the retaining ring includes a retaining ring body, the retaining ring body having a first free end and a second free end disposed opposite to each other, and a positioning part is provided on the outer periphery of the support ring, the first free end and the second free end being able to abut against the positioning part to position the retaining ring radially along the connecting tube.

[0014] The beneficial effects of this utility model are as follows: The battery pack proposed in this utility model has a first connector located at least partially inside the outer casing and connected to a liquid cooling assembly inside the casing, while a second connector is located on the outer casing. By inserting the connecting tube of the second connector into the first connector, the length of the second connector located on the outer casing can be shortened, thereby shortening the overall length of the liquid cooling connector assembly outside the battery pack casing. This saves design space and material costs in the length direction of the liquid cooling connector assembly, reduces the probability of damage to the liquid cooling connector assembly due to bumps during transportation, improves process yield, and also reduces repair and maintenance costs. The second connector is connected to the outer casing or the first connector via a first snap-fit ​​part and a second snap-fit ​​part, allowing the second connector to be detached and transported separately during transportation, reducing the risk of connector damage, improving installation and disassembly efficiency, simplifying the connection structure between the first and second connectors, and improving connection stability. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0016] In the attached diagram: Figure 1 A perspective view of the first connector and the second connector mounted on the housing according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the first connector and the second connector separated in one embodiment of the present invention; Figure 3 This is a schematic diagram of the second connector structure provided in one embodiment of the present utility model; Figure 4 This is a side view of the first connector and the second connector installed on the housing according to one embodiment of the present invention; Figure 5 This is a front view of the first connector and the second connector provided in one embodiment of the present invention mounted on the housing; Figure 6 for Figure 5 Sectional view at point AA; Figure 7 for Figure 5 Sectional view at point BB; Figure 8 This is a front view provided in another embodiment of the present invention; Figure 9 for Figure 8 Sectional view at CC; Figure 10 This is a perspective view of the first connector and the second connector installed on the housing according to another embodiment of the present invention; Figure 11 This is a schematic diagram of the structure where the first connector and the second connector are separated, provided in another embodiment of the present invention; Figure 12 This is a schematic diagram of the structure of the second connector provided in another embodiment of the present invention; Figure 13 This is a front view of the second connector provided in another embodiment of the present invention; Figure 14 This is a perspective view of the second connector provided in another embodiment of the present invention; Figure 15 This is a schematic diagram of a snap ring structure provided in another embodiment of the present invention; Figure 16 This is a schematic diagram of the connection between the first connector and the liquid cooling assembly provided in another embodiment of the present invention; Figure 17 This is a schematic diagram of the connection between the first connector and the liquid cooling assembly from another angle, as provided in another embodiment of the present invention.

[0017] The attached figures are labeled as follows: 11-Outer shell; 111-Slot; 112-Through hole; 12-Second connector; 121-Connector body; 122-Support ring; 122a-Mounting groove; 122b-Relief groove; 122c-Positioning part; 123-Connecting tube; 124-Claw; 124a-Limiting part; 124b-Elastic clip; 125-Sealing ring; 126-Snap ring; 126a-Snap ring body; 126b-Anti-detachment part; 13-First connector; 131-Flange; 14-Liquid cooling components; 15 - Water pipe. Detailed Implementation

[0018] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0019] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0020] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0021] Please see Figures 1 to 4 , Figure 1 A battery pack provided in one embodiment of the present utility model, such as Figures 1 to 4 As shown, the battery pack includes: The outer casing 11 has a through hole 112, and the two ends of the through hole 112 are respectively connected to the inner side and the outer side of the outer casing 11; The liquid cooling connector assembly includes a first connector 13 and a second connector 12. The first connector 13 passes through the through hole 112 and is fixedly connected to the housing 11. The first end of the first connector 13 is used to connect to the liquid cooling assembly 14 located inside the housing 11, and the second end of the first connector 13 faces the outside of the housing 11. The second connector 12 is located on the outside of the housing 11. The second connector 12 has a connecting tube 123, which is inserted into the first connector 13 from the outside to the inside of the housing 11 and is sealed to the first connector 13. The second connector 12 is provided with a first snap-fit ​​part, and the outer shell 11 or the first connector 13 is provided with a second snap-fit ​​part that cooperates with the first snap-fit ​​part. The first snap-fit ​​part and the second snap-fit ​​part snap-fit ​​together to lock the second connector 12 and the outer shell 11 along the axial direction of the connecting pipe 123.

[0022] Specifically, the outer casing 11 has a through hole 112 extending through its thickness direction, which connects the inner and outer sides of the outer casing 11. The first end of the first connector 13 is located inside the outer casing 11 and communicates with the liquid cooling assembly 14 inside the outer casing 11. The liquid cooling assembly 14 includes a liquid cooling plate or a water nozzle for the liquid cooling plate. The second end of the first connector 13 passes through the through hole 112 from the inner side of the outer casing 11. The second end of the first connector 13 can extend out of the through hole 112 to the outer side of the outer casing 11, or it can remain inside the through hole 112. The second end of the first connector 13 is connected to the outer casing 11 by adhesive or welding. The first end of the second connector 12 is located outside the outer casing 11. The second end of the second connector 12 has a connecting pipe 123 that mates with the first connector 13. The connecting pipe 123 is fitted inside the first connector 13 and is sealed to it.

[0023] The first end of the second connector 12 is expanded with a water pipe 15, which is used for the inflow or outflow of external coolant. That is, after the second connector 12 is sealed and connected to the first connector 13, the exchange of external coolant and coolant in the liquid cooling plate inside the battery pack can be directly realized without the need for an additional water pipe adapter, which further simplifies the structural complexity and improves the installation efficiency.

[0024] The second connector 12 is provided with a first snap-fit ​​part, and the outer shell 11 or the first connector 13 is provided with a second snap-fit ​​part that mates with the first snap-fit ​​part. By snapping together with the first snap-fit ​​part and the second snap-fit ​​part, the second connector 12 and the outer shell 11 can be locked together along the axial direction of the connecting pipe 123.

[0025] In one example, the first connector 13 and the second connector 12 are integrally molded by injection molding, which is simple in structure, easy to manufacture, and has low manufacturing cost.

[0026] In this embodiment, the first connector 13 is at least partially located inside the housing 11 and connected to the liquid cooling assembly 14 inside the housing 11, while the second connector 12 is located outside the housing 11. By inserting the connecting tube 123 of the second connector 12 into the first connector 13, the length of the second connector 12 located outside the housing 11 can be shortened, thereby shortening the overall length of the liquid cooling connector assembly outside the battery pack housing 11. This saves design space and material costs in the length direction of the liquid cooling connector assembly, reduces the probability of damage to the liquid cooling connector assembly due to bumps during transportation, improves process yield, and also reduces repair and maintenance costs. The second connector 12 is connected to the housing 11 or the first connector 13 by a snap-fit ​​connection between the first snap-fit ​​part and the second snap-fit ​​part, allowing the second connector 12 to be disassembled and transported separately during transportation, reducing the risk of connector damage, improving installation and disassembly efficiency, simplifying the connection structure between the first connector 13 and the second connector 12, and also improving the stability of the connection.

[0027] In some implementations, such as Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the second connector 12 includes a connector body 121 and a support ring 122 connected to the connector body 121. The connecting pipe 123 is connected to the connector body 121. There is a radial gap between the support ring 122 and the connecting pipe 123 along the radial direction of the connecting pipe 123. The second end of the first connector 13 extends into the radial gap. A sealing ring 125 is installed on the outer wall of the connecting pipe 123. The sealing ring 125 is sealed to the inner wall of the first connector 13.

[0028] The first end of the second connector 12 is the connector body 121, and the support ring 122 and the connecting pipe 123 are located at the second end of the second connector 12. The support ring 122 is located on the periphery of the connecting pipe 123, and the inner diameter of the support ring 122 is larger than the outer diameter of the connecting pipe 123. The support ring 122 extends in the same direction as the connecting pipe 123 along its axial direction. There is a radial gap between the support ring 122 and the connecting pipe 123, and the second end of the first connector 13 can extend into the radial gap. A sealing groove is provided on the outer periphery of the connecting pipe 123, and a sealing ring 125 is sleeved on the outer periphery of the connecting pipe 123 and located in the sealing groove. The sealing ring 125 is sealed and fitted with the inner wall of the first connector 13. The connecting pipe 123 of the second connector 12 is inserted into the first connector 13 and sealed and connected with the first connector 13. The sealing method is internal sealing, which simplifies the structure of the liquid-cooled connector assembly and saves processing costs.

[0029] In one example, the number of sealing grooves is equal to the number of sealing rings 125, and both are spaced apart along the axial direction of the connecting pipe 123.

[0030] In some implementations, such as Figure 3 , Figure 6 and Figure 7 As shown, the first engaging portion includes claws 124 disposed on the support ring 122, with at least two claws 124 arranged circumferentially along the support ring 122. The second engaging portion includes a slot 111 disposed on the outer shell 11, with the claws 124 extending into the slot 111 to lock the second connector 12 to the outer shell 11. The support ring 122 abuts against the outer side of the outer shell 11. The claws 124 are disposed on the outer periphery of the support ring 122, and the slots 111 are correspondingly disposed with the claws 124. At least two claws 124 can improve the stability of the connection between the claws 124 and the slots 111 on the outer shell 11.

[0031] In one example, the claws 124 are evenly distributed along the circumference of the support ring 122 to distribute the force on the claws 124 and the slot 111, thereby further improving the stability of the connection between the claws 124 and the slot 111.

[0032] In some implementations, such as Figure 3 , Figure 6 and Figure 7As shown, the chuck 124 includes an elastic clip 124b and a limiting part 124a. One end of the elastic clip 124b is connected to the support ring 122, and the other end is connected to the limiting part 124a. When the second connector 12 is connected to the housing 11, the elastic clip 124b extends into the slot 111, and the limiting part 124a presses against the inner surface of the housing 11. The limiting part 124a is a hook, which hooks onto the inner surface of the housing 11, allowing the second connector 12 to be engaged with the housing 11. The elastic clip 124b is elastic, facilitating the connection and disassembly of the limiting part 124a from the housing 11. The chuck 124 has a simple structure, saves processing costs, and is convenient for installation and disassembly.

[0033] In one example, the hook has a guide surface to facilitate its engagement into the slot 111.

[0034] In some implementations, such as Figure 8 and Figure 9 As shown, the first snap-fit ​​portion includes an elastic limiting member disposed on the second connector 12. The elastic limiting member is capable of generating elastic deformation along the radial direction of the connecting pipe 123. The second snap-fit ​​portion includes a flange 131 disposed at the second end of the first connector 13. The elastic limiting member abuts against the side of the flange 131 facing the inside of the housing 11, and the support ring 122 abuts against the outside of the housing 11.

[0035] The second connector 12 is fitted with an elastic retaining member on its outer periphery, which axially locks the second connector 12. The second end of the first connector 13 has a flange 131 on its outer periphery. The second end of the first connector 13 can extend through the through hole 112 to the outside of the outer shell 11, so that the flange 131 is located on the outside of the outer shell 11. When the second connector 12 and the first connector 13 are aligned, the elastic retaining member abuts against the side of the flange 131 facing the inside of the outer shell 11. Alternatively, the flange 131 of the first connector 13, facing the inside of the outer shell 11, hooks the elastic retaining member along the axial direction of the connecting pipe 123, thereby locking the second connector 12 and the outer shell 11 axially along the connecting pipe 123. After the second connector 12 and the first connector 13 are aligned, the installation and disassembly of the second connector 12 and the outer shell 11 can be achieved by installing and removing the elastic retaining member, resulting in a simple structure, low cost, and high installation and disassembly efficiency.

[0036] In some implementations, such as Figures 10 to 15As shown, the elastic limiting component is a retaining ring 126. The support ring 122 has a mounting groove 122a, and the retaining ring 126 is disposed within the mounting groove 122a. The mounting groove 122a restricts the axial displacement of the retaining ring 126 along the support ring 122. The mounting groove 122a extends circumferentially along the support ring 122, serving to axially limit the retaining ring 126. Furthermore, when the retaining ring 126 is disposed within the mounting groove 122a, the portion of the retaining ring 126 protruding from the support ring 122 is reduced, thereby preventing damage from impacts during transport and improving process yield.

[0037] In some implementations, such as Figure 12 and Figure 15 As shown, the snap ring 126 includes a U-shaped snap ring body 126a. The snap ring body 126a has a first free end and a second free end that are disposed opposite to each other. The first free end and the second free end are bent to form an anti-disengagement portion 126b that extends axially along the connecting tube 123. The anti-disengagement portion 126b can stop and abut against the outer periphery of the support ring 122 to limit the snap ring 126 from disengaging from the mounting groove 122a radially along the connecting tube 123.

[0038] In one example, the two free ends of the snap ring 126 pass through the outer periphery of the support ring 122 at corresponding positions. The radial gap between the inner periphery of the support ring 122 and the outer periphery of the connecting tube 123 forms a mating space. The two free ends of the snap ring 126 can pass through the mounting groove 122a and extend into the mating space.

[0039] In one example, the snap ring body 126a is tubular or sheet-like, with two free ends, a first free end and a second free end, and a circumferential gap between the first and second free ends. The first free end is bent to form an anti-disengagement portion 126b extending axially along the connecting tube 123, and the second free end is also bent to form an anti-disengagement portion 126b extending axially along the connecting tube 123. The anti-disengagement portions 126b formed by the bending of the first and second free ends can extend in the same direction or in opposite directions. When the snap ring 126 disengages radially from the mounting groove 122a along the connecting tube 123, the anti-disengagement portion 126b can stop and abut against the outer periphery of the support ring 122 to prevent the snap ring 126 from disengaging from the mounting groove 122a. It should be noted that when the retaining ring 126 is not dislodged from the mounting groove 122a, the anti-dislodgement part 126b is separated from the outer periphery of the support ring 122 (does not contact). The anti-dislodgement part 126b can prevent the retaining ring 126 from dislodging from the mounting groove 122a, thereby improving the stability of the connection between the first connector 13 and the second connector 12.

[0040] In some implementations, such as Figures 12 to 17As shown, the outer periphery of the support ring 122 is provided with at least one set of relief grooves. Each set of relief grooves includes two relief grooves 122b located on the same side or opposite side of the mounting groove 122a along the axial direction of the connecting pipe 123. The two relief grooves 122b in each set of relief grooves correspond one-to-one with the two anti-detachment parts 126b. The relief grooves 122b are connected to the mounting groove 122a. The anti-detachment parts 126b can enter and exit the relief grooves 122b. When the anti-detachment parts 126b enter the relief grooves 122b, the first free end and the second free end can move away from each other so that the snap ring 126 and the flange 131 are disengaged from each other. When the anti-detachment parts 126b exit the relief grooves 122b, the first free end and the second free end can approach each other and abut against the side of the flange 131 facing the inner side of the outer casing 11 so as to lock the snap ring 126 and the flange 131 along the axial direction of the connecting pipe 123.

[0041] The two relief grooves 122b in the same relief groove group can be located on the same side of the mounting groove 122a along the axial direction of the connecting pipe 123, or on opposite sides of the mounting groove 122a along the axial direction of the connecting pipe 123, depending on the extension direction of the two anti-detachment parts 126b. The two relief grooves 122b in each relief groove group are arranged at intervals along the circumference of the support ring 122. The two anti-detachment parts 126b are installed in the same set of relief grooves 122b each time. That is, when the anti-detachment part 126b enters the relief groove 122b, one anti-detachment part 126b corresponds to one relief groove 122b in the same set of relief grooves, and the other anti-detachment part 126b corresponds to the other relief groove 122b in the same set of relief grooves.

[0042] In one example, the two anti-detachment parts 126b can enter and exit the relief groove 122b simultaneously; or, the two anti-detachment parts 126b can not enter and exit the relief groove 122b simultaneously.

[0043] When it is necessary to disassemble the liquid cooling connector assembly, the retaining ring 126 is pulled out of the mounting groove 122a. During the withdrawal of the retaining ring 126, as the outer diameter of the support ring 122 gradually increases, the anti-disengagement part 126b remains in contact with the outer circumference of the support ring 122, thereby causing the first and second free ends of the retaining ring 126 to gradually move away from each other. When the first and second free ends of the retaining ring 126 move away from each other until they separate from the flange 131 radially along the connecting pipe 123, the first connector 13 and the second connector 12 unlock axially along the connecting pipe 123.

[0044] In some embodiments, the two anti-detachment portions 126b extend in the same direction, and the relief groove group includes two sets located on opposite sides of the mounting groove 122a along the axial direction of the connector 123; or, the two anti-detachment portions 126b extend in opposite directions, and the relief groove group is one set, with the two relief grooves 122b located on opposite sides of the mounting groove 122a along the axial direction of the connector 123. If the two anti-detachment portions 126b extend in the same direction, the retaining ring 126 needs to be installed in a specific direction to enter the relief groove 122b. Therefore, the above arrangement ensures that the anti-detachment portion 126b of the retaining ring 126 has a corresponding relief groove 122b regardless of its orientation, facilitating the installation and removal of the retaining ring 126 and improving the overall installation and removal efficiency of the liquid cooling connector assembly.

[0045] When the two anti-detachment parts 126b extend in opposite directions, it is only necessary to provide a pair of relief grooves 122b located on opposite sides of the mounting groove 122a along the axial direction of the connecting pipe 123.

[0046] In some implementations, such as Figures 12 to 15 As shown, the snap ring 126 includes a snap ring body 126a, which has a first free end and a second free end disposed opposite to each other. A positioning part 122c is provided on the outer periphery of the support ring 122. The first free end and the second free end can abut against the positioning part 122c to position the snap ring 126 radially along the connecting tube 123.

[0047] Specifically, the positioning part 122c includes a U-shaped cover plate connected to the outer periphery of the support ring 122. When the first free end and the second free end abut against the positioning part 122c, the retaining ring 126 is installed in place. When installing and removing the first connector 13 and the second connector 12, the anti-detachment part 126b must first enter the relief groove 122b. The force applied to the retaining ring 126 during each installation may be different, or due to burrs on the outer periphery of the connecting pipe 123, the position of the retaining ring 126 when it is engaged in the mounting groove 122a may be uncertain each time. This results in inconsistent opening and closing distances of the retaining ring 126, making it impossible to control the clamping force between the retaining ring 126 and the flange 131, and even whether the retaining ring 126 and the flange 131 can be engaged at all. The positioning part 122c can determine the distance and position of the snap ring 126 when it is inserted into the mounting groove 122a each time, making the clamping force of the snap ring 126 controllable and ensuring that the snap ring 126 is clamped to the flange 131, thereby ensuring the connection stability between the first connector 13 and the second connector 12.

[0048] Furthermore, the positioning part 122c ensures that after the retaining spring 126 is installed in place, there is a stable gap between the end of the retaining spring 126 away from its two free ends and the outer periphery of the support ring 122, facilitating the removal of the retaining spring 126. Also, after the retaining spring 126 is installed into the mounting groove 122a, it may continue to move into the mounting groove 122a. If the first and second free ends extend too far out of the mounting groove 122a, they are prone to damage or interference with other components or structures. By providing the positioning part 122c, after the retaining spring 126 is installed in place, it restricts the retaining spring 126 from moving further into the mounting groove 122a, preventing the first and second ends of the retaining spring 126 from extending too far out of the mounting groove 122a and causing damage.

[0049] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A battery pack, characterized in that, include: The outer casing has a through hole, and the two ends of the through hole are respectively connected to the inner side and the outer side of the outer casing; A liquid cooling connector assembly includes a first connector and a second connector. The first connector passes through the through hole and is fixedly connected to the housing. A first end of the first connector is used to connect to the liquid cooling assembly located inside the housing, and a second end of the first connector faces the outside of the housing. The second connector is located on the outside of the housing, and the second connector has a connecting tube that is inserted into the first connector from the outside of the housing inward and is sealed to the first connector. The second connector is provided with a first snap-fit ​​portion, and the outer shell or the first connector is provided with a second snap-fit ​​portion that mates with the first snap-fit ​​portion. The first snap-fit ​​portion and the second snap-fit ​​portion snap-fit ​​together to lock the second connector and the outer shell along the axial direction of the connecting pipe.

2. The battery pack according to claim 1, characterized in that, The second connector includes a connector body and a support ring connected to the connector body. The support ring and the connecting pipe have a radial gap along the radial direction of the connecting pipe. The second end of the first connector extends into the radial gap. A sealing ring is installed on the outer wall of the connecting pipe, and the sealing ring is in a sealing fit with the inner wall of the first connector.

3. The battery pack according to claim 2, characterized in that, The first snap-fit ​​portion includes a snap claw disposed on the support ring, with at least two snap claws arranged circumferentially along the support ring. The second snap-fit ​​portion includes a snap groove disposed on the outer shell, with the snap claws extending into the snap groove to lock the second connector to the outer shell. The support ring abuts against the outer side of the outer shell.

4. The battery pack according to claim 3, characterized in that, The claw includes an elastic clip and a limiting part. One end of the elastic clip is connected to the support ring, and the other end is connected to the limiting part. When the second connector is connected to the outer shell, the elastic clip extends into the slot, and the limiting part presses against the inner surface of the outer shell.

5. The battery pack according to claim 2, characterized in that, The first snap-fit ​​portion includes an elastic limiting member disposed on the second connector, the elastic limiting member being capable of generating elastic deformation along the radial direction of the connecting pipe, the second snap-fit ​​portion includes a flange disposed at the second end of the first connector, the elastic limiting member abutting against the side of the flange facing the inner side of the housing, and the support ring abutting against the outer side of the housing.

6. The battery pack according to claim 5, characterized in that, The elastic limiting component is a retaining ring, and the support ring has a mounting groove. The retaining ring is disposed in the mounting groove, and the mounting groove is used to limit the axial displacement of the retaining ring along the support ring.

7. The battery pack according to claim 6, characterized in that, The retaining ring includes a U-shaped retaining ring body, which has a first free end and a second free end disposed opposite to each other. The first free end and the second free end are bent to form an anti-disengagement portion extending axially along the connecting tube. The anti-disengagement portion can stop and abut against the outer periphery of the support ring to prevent the retaining ring from disengaging from the mounting groove radially along the connecting tube.

8. The battery pack according to claim 7, characterized in that, The outer periphery of the support ring is provided with at least one set of relief grooves. Each set of relief grooves includes two relief grooves located on the same side or opposite side of the mounting groove along the axial direction of the connecting pipe. The two relief grooves in each set of relief grooves correspond one-to-one with the two anti-detachment parts. The relief grooves are connected to the mounting groove. The anti-detachment parts can enter and exit the relief grooves. When the anti-detachment part enters the relief groove, the first free end and the second free end can move away from each other to disengage the snap ring from the flange. When the anti-detachment part exits the relief groove, the first free end and the second free end can move closer to each other and abut against the side of the flange facing the inner side of the housing to lock the snap ring and the flange along the axial direction of the connecting pipe.

9. The battery pack according to claim 8, characterized in that, The two anti-detachment parts extend in the same direction, and the relief groove group includes two sets located on opposite sides of the mounting groove along the axial direction of the connecting pipe; or, the two anti-detachment parts extend in opposite directions, and the relief groove group is one set, with the two relief grooves located on opposite sides of the mounting groove along the axial direction of the connecting pipe.

10. The battery pack according to claim 6, characterized in that, The retaining ring includes a retaining ring body, which has a first free end and a second free end disposed opposite to each other. A positioning part is provided on the outer periphery of the support ring. The first free end and the second free end can abut against the positioning part to position the retaining ring radially along the connecting tube.

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