Battery devices and power-consuming devices

Abstract

The present application discloses a battery device and an electrical device. The present application relates to the field of battery technology. The battery device includes a battery cell assembly and a heat exchange assembly. The heat exchange assembly includes a current collector, a heat exchange body, and a locking member. The heat exchange body is arranged on the side of the battery cell assembly. The current collector has an installation channel. The locking member includes a locking joint. The locking joint is installed at the end of the heat exchange body. At least a portion of the locking joint is inserted into the installation channel. The locking joint has a first part and a second part. The first part and the second part are both locked with the current collector. According to the battery device of the present application, the first part and the second part of the locking joint are both locked with the current collector to achieve bidirectional locking of the current collector, thereby increasing the locking strength of the locking joint on the current collector, reducing the risk of the heat exchange body falling off the current collector, and thereby improving the sealing of the locking joint.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Art

[0002] Power batteries all have heat exchange components, which contain multiple pipelines. The heat exchange medium needs to be transported by connecting the pipelines, and the adjacent pipelines are connected by joints. However, when the power battery is subjected to vibration or impact, gaps are likely to form between the joints and the pipelines, or the joints may fall off the pipelines, resulting in poor sealing performance and easily causing leakage of the heat exchange medium. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a battery device in which both the first and second portions of a locking joint are locked to a current collector to achieve bidirectional locking of the current collector, thereby increasing the locking strength of the locking joint on the current collector, reducing the risk of the heat exchange body falling off the current collector, and thereby improving the sealing performance of the locking joint.

[0004] The present application also provides an electrical device having the above-mentioned battery device.

[0005] According to the first aspect of the present application, the battery device includes: a battery cell assembly; a heat exchange assembly, the heat exchange assembly including a current collector, a heat exchange body and a locking member, the heat exchange body is arranged on the side of the battery cell assembly, the current collector has an installation channel, the locking member includes a locking joint, the locking joint is installed at the end of the heat exchange body, at least a portion of the locking joint is inserted into the installation channel, the locking joint has a first part and a second part, and the first part and the second part are both locked with the current collector.

[0006] According to the battery device of the present application, the current collector has an installation channel, at least a portion of the locking joint is inserted into the installation channel, and the first part and the second part of the locking joint are both locked with the current collector, and are used to lock between the current collector and the heat exchange body to achieve two-way locking of the current collector, so as to increase the locking strength of the locking joint on the current collector, reduce the risk of the heat exchange body falling off the current collector, and thereby improve the sealing of the locking joint.

[0007] In some embodiments, the first portion is located in the installation channel, a plurality of compression blocks are arranged in a circumferential direction of the first portion, and a compression groove is formed between two adjacent compression blocks.

[0008] In this embodiment, a plurality of compression blocks are arranged in the circumferential direction of the first part, and a compression groove is formed between two adjacent compression blocks. When the first part is installed in the installation channel, the plurality of compression blocks are deformed toward the compression groove so that the first part can be inserted into the installation channel. At the same time, the plurality of compression blocks can generate a reverse force and abut against the inner wall of the installation channel to form an interference fit with the installation channel, thereby locking the first part of the locking joint and the current collector.

[0009] In some embodiments, the first portion is the end portion of the locking joint, and the first portion has an end surface and an outer peripheral surface, and there is an arc transition between the end surface and the outer peripheral surface.

[0010] In this embodiment, an arc transition is provided between the end face and the outer peripheral surface of the first part. When the first part is inserted into the installation channel, the arc transition between the end face and the outer peripheral surface can play a guiding role, thereby facilitating the insertion of the first part into the installation channel.

[0011] In some embodiments, the mounting channel includes a first channel and a second channel, the size of the first channel is larger than the size of the second channel, the first channel has a first side wall on the side facing the second channel, the first part is suitable for being installed into the first channel through the second channel, and the compression block is suitable for abutting against the first side wall to limit the axial position of the locking joint.

[0012] In this embodiment, the size of the first channel is set to be larger than that of the second channel, and the first part is installed in the first channel through the second channel. The compression block in the first channel can be fully reset and partially reset so that the compression block abuts against the first side wall of the first channel to limit the axial position of the locking joint.

[0013] In some embodiments, the first portion further includes an anti-dropping block, the anti-dropping block being disposed on an outer peripheral surface of the compression block, and the anti-dropping block abutting against the first side wall.

[0014] In this embodiment, an anti-detachment block is provided on the outer circumferential surface of the shrink block, and the anti-detachment block abuts against the first side wall, thereby further limiting the axial position of the locking joint and further reducing the risk of the locking joint detaching from the current collector.

[0015] In some embodiments, each compression block is provided with a plurality of anti-dropout blocks, and the plurality of anti-dropout blocks are spaced apart along the circumference of the locking joint.

[0016] In this embodiment, multiple anti-detachment blocks are provided, and the multiple anti-detachment blocks are all in contact with the first side wall, which can further increase the contact area between the first part and the first side wall and increase the pull-out resistance, so as to further limit the axial position of the locking joint and further reduce the risk of the locking joint detaching from the collector.

[0017] In some embodiments, the locking member also includes a sealing ring, and the locking joint also has a third part. In the axial direction of the locking joint, the third part is connected between the first part and the second part, the third part is located in the installation channel, and the sealing ring is sleeved on the third part.

[0018] In this embodiment, a sealing ring is provided, the third part is located in the installation channel, and the sealing ring is outer-mounted on the third part to seal the gap between the current collector and the locking joint, thereby reducing the risk of heat exchange medium leakage.

[0019] In some embodiments, the third portion further has an annular groove on its circumference, and part of the sealing ring is located in the annular groove.

[0020] In this embodiment, an annular groove is provided on the circumference of the third part, and part of the sealing ring is located in the annular groove. The annular groove can prevent the sealing ring from being displaced from the third part when the third part is plugged in.

[0021] In some embodiments, there are multiple annular grooves, and the multiple annular grooves are arranged at intervals along the axial direction of the locking joint. The number of the sealing rings is equal to the number of the annular grooves and corresponds one to one.

[0022] This embodiment provides multiple annular grooves and multiple sealing rings to further improve the sealing effect of the sealing rings.

[0023] In some embodiments, in the radial direction of the locking joint, the size of the second portion is larger than the size of the mounting channel, so that the side wall of the second portion abuts against the side wall of the collector in the axial direction to limit the axial position of the locking joint.

[0024] In this embodiment, the size of the second portion is set to be larger than the size of the installation channel, so that the side wall of the second portion abuts against the side wall of the current collector, thereby limiting the axial position of the locking joint.

[0025] In some embodiments, the locking member further includes a first locking portion, the current collector has a second locking portion, the first locking portion is located on the second portion, and the first locking portion and the second locking portion cooperate to limit the rotation of the locking joint.

[0026] This embodiment sets a first locking part and a second locking part to cooperate to limit the rotation of the locking joint, which can limit the position of the locking joint in the radial direction, so that the locking joint is not easy to fall off under vibration and impact conditions, and the sealing performance of the locking joint can be improved.

[0027] In some embodiments, the first locking portion includes a locking ring, the second locking portion includes a first locking block, the first locking block extends to the radially outer side of the second portion, the locking ring surrounds the outer side of the locking block, and in the rotation direction of the locking ring, the locking ring has a locking position and an unlocking position. In the locking position, the locking ring is locked with the first locking block, and in the unlocking position, the locking ring is unlocked with the first locking block.

[0028] In this embodiment, the locking ring has a locking position and an unlocking position. In the unlocking position, the locking ring is unlocked from the first locking block, and the locking joint can rotate in the circumferential direction; in the locking position, the locking ring is locked with the first locking block, which is used to limit the circumferential rotation of the locking joint.

[0029] In some embodiments, a second locking block and an unlocking groove are provided on the inner wall of the locking ring in the circumferential direction of the locking ring. In the unlocking position, the first locking block is located in the unlocking groove. In the locking position, the first locking block abuts against the second locking block.

[0030] In this embodiment, a second locking block and an unlocking groove are provided on the inner wall of the locking ring. The unlocking groove is used to avoid the first locking block. The first locking block is inserted into the unlocking groove so that the locking ring can be installed to the outer peripheral side of the first locking block and the locking joint. The first locking block abuts against the second locking block to lock the locking joint in the circumferential direction.

[0031] In some embodiments, a plurality of the first locking blocks are provided, and the plurality of first locking blocks are arranged around the circumference of the second portion.

[0032] In this embodiment, by providing a plurality of first locking blocks, the number of first locking blocks to be locked with the second locking block can be selected according to actual needs, so as to select the locking strength between the first locking block and the second locking block.

[0033] In some embodiments, the number of the second locking blocks is equal to and corresponds one to one to the first locking blocks, a plurality of the second locking blocks are arranged at intervals along the inner wall of the locking ring, and the unlocking groove is formed between two adjacent second locking blocks.

[0034] This embodiment provides multiple second locking blocks, which are equal in number and correspond one to one to the multiple first locking blocks. When in the locking position, multiple first locking blocks and multiple second locking blocks can be locked to achieve multiple locking of the current collector and the locking joint in the circumferential direction, so as to further improve the locking strength of the current collector and the locking joint.

[0035] In some embodiments, the first locking block has a locking groove on a side facing away from the second part, and the locking groove penetrates the first locking block circumferentially. The locking ring is circumferentially arranged in the locking groove so that after the second locking block of the locking ring rotates into the locking groove, it abuts against the bottom wall of the locking groove for locking.

[0036] This embodiment provides a locking groove on the side of the first locking block away from the second part. In the locking position, the locking ring is circumferentially inserted into the locking groove, and the second locking block abuts against the bottom wall of the locking groove for locking. Not only can the locking joint and the current collector be locked in the circumferential direction, but the locking groove can also limit the position of the current collector and the locking joint in the axial direction.

[0037] In some embodiments, a limiting block is provided on the bottom wall of the locking groove, and the second locking block abuts against the limiting block for locking.

[0038] In this embodiment, a limiting block is provided on the bottom wall of the locking groove, and the second locking block abuts against the limiting block for locking. The limiting block can increase the locking strength between the second locking block and the locking ring.

[0039] In some embodiments, the limiting block has a guide surface, and the guide surface is inclined to guide the limiting block to move toward the second locking block.

[0040] In this embodiment, a guide surface is provided to guide the limiting block to move toward the second locking block, so that the second locking block can be easily moved to the limiting block, which can save effort when rotating the locking ring.

[0041] In some embodiments, a side of the second locking block facing the first locking block has a plurality of step surfaces, and the plurality of step surfaces are staggered along the radial direction of the locking ring.

[0042] In this embodiment, a plurality of step surfaces are provided on the side of the second locking block facing the first locking block, and the plurality of step surfaces are staggered along the radial direction of the locking ring. The plurality of step surfaces protrude toward the axis of the locking ring on the side facing the axis of the locking ring in sequence. The second locking block contacts the plurality of step surfaces in sequence. The plurality of step surfaces can play a guiding role, and also enable the first locking block to be locked with one of the step surfaces.

[0043] In some embodiments, the plurality of step surfaces include a first step surface. In the rotation direction of the locking ring, the two ends of the first step surface are respectively a first end and a second end, and the second end is arranged close to the axis of the locking ring relative to the first end.

[0044] In this embodiment, the two ends of the first step surface are respectively the first end and the second end in the rotation direction of the locking ring, and the second end is arranged close to the axis of the locking ring relative to the first end. The first step surface first contacts the first locking block to guide the rotation of the locking ring, and slowly locks the first step surface and the second locking block.

[0045] In some embodiments, the plurality of step surfaces include a second step surface, and in the rotation direction of the locking ring, the second step surface is located on the downstream side of the first step surface, and the two ends of the second step surface are respectively a third end and a fourth end, and the fourth end is arranged close to the axis of the locking ring relative to the third end, and the second end is arranged close to the axis of the locking ring relative to the third end, and the fourth end is arranged close to the axis of the locking ring relative to the second end.

[0046] In this embodiment, the second step surface is provided to lock with the first locking block. The side surface of the first step surface facing the second step surface can limit the circumferential position of the first locking block, and also make the locking strength between the second step surface and the first locking block stronger.

[0047] In some embodiments, the plurality of step surfaces include a third step surface. In the rotation direction of the locking ring, the third step surface is located on the downstream side of the second step surface. The third step surface is an arc-shaped surface. The axis of the third step surface is colinear with the axis of the locking ring. The fourth end is arranged close to the axis of the locking ring relative to the third step surface.

[0048] In this embodiment, a third step surface is provided, which is located on the downstream side of the second step surface. The fourth end is provided relative to the third step surface and close to the axis of the locking ring to limit the position of the locking ring.

[0049] In some embodiments, the second portion is provided with an avoidance groove, and the first locking block is located in the avoidance groove.

[0050] In this embodiment, an avoidance groove is provided in the second part, and the first locking block is located in the avoidance groove, so as to further limit the circumferential position of the first locking block, thereby further limiting the circumferential position of the current collector and the locking joint.

[0051] In some embodiments, the side surface of the first locking block facing the second portion is a first arcuate surface, and the groove surface of the avoidance groove is a second arcuate surface that is adapted to the shape of the first arcuate surface.

[0052] In this embodiment, the provision of the first curved surface and the second curved surface can avoid stress concentration and also facilitate the processing and manufacturing of the first locking block and the avoidance groove.

[0053] In some embodiments, the second portion has a mounting groove in the circumference thereof, and the locking ring is rotatably disposed in the mounting groove.

[0054] In this embodiment, a mounting groove is provided in the circumferential direction of the second part, and the locking ring is rotatably provided in the mounting groove. The mounting groove can limit the locking ring in the axial direction so that the locking ring can only rotate along the circumferential direction.

[0055] In some embodiments, a rotating paddle is further provided on the outer side of the locking ring.

[0056] In this embodiment, a rotating paddle is provided on the outer side of the locking ring. The locking ring can be rotated by turning the rotating paddle, which can save effort when rotating the locking ring and is convenient for users to use.

[0057] In some embodiments, there are multiple installation channels, and the first channels of the multiple installation channels are connected to form a connecting channel.

[0058] In some embodiments, the heat exchange body includes at least one heat exchange tube, and the heat exchange tube is bent at a side surface of the battery cell assembly.

[0059] In this embodiment, the heat exchange body includes at least one heat exchange tube, and the heat exchange tube is bent at the side of the battery cell assembly, so that the structure of the heat exchange body is simple and the production cost is low.

[0060] In some embodiments, the heat exchange body includes a flow guide tube and a heat exchange component, the flow guide tube is connected between the locking joint and the heat exchange component, and the heat exchange component is provided on a side of the battery cell assembly.

[0061] In this embodiment, the heat exchange body includes a flow guide pipe and a heat exchange element. The flow guide pipe is used to divert or merge the heat exchange element.

[0062] In some embodiments, the flow guide tube is a straight tube or a bent tube.

[0063] In this embodiment, by designing the flow guide tube as a straight tube or a bent tube, the direction of the flow guide tube can be adjusted according to the internal space of the battery device, thereby saving the internal space of the battery device and improving the overall energy density of the battery device.

[0064] In some embodiments, the heat exchange element is a heat exchange plate.

[0065] In this embodiment, the heat exchange component is a heat exchange plate, which can fit tightly against the battery cell assembly, so that the heat exchange plate can better exchange heat for the battery cell assembly. In this embodiment, the collector is provided with multiple installation channels, and the first channels of the multiple installation channels are connected to construct a connecting channel, which is used to realize the diversion or confluence of the heat exchange medium.

[0066] The electrical device according to the second aspect of the present application includes: the battery device according to the first aspect of the present application.

[0067] According to the electric device of the present application, since the performance of the battery device is improved, it is beneficial to improve the working power performance of the electric device.

[0068] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0070] Figure 1 is a schematic diagram of a vehicle according to some embodiments of the present application;

[0071] Figure 2 is a schematic diagram of a heat exchange component according to some embodiments of the present application;

[0072] Figure 3 yes Figure 2 A perspective view of the heat exchange assembly in the middle portion;

[0073] Figure 4 yes Figure 3 A partial enlarged view of the heat exchange component in the middle part;

[0074] Figure 5 is a schematic diagram of the cooperation between the flow guide tube and the locking joint according to some embodiments of the present application;

[0075] Figure 6 is a schematic diagram of a locking joint according to some embodiments of the present application;

[0076] Figure 7 yes Figure 6 Exploded view of the middle locking connector;

[0077] Figure 8 yes Figure 6 Side view of the middle locking joint;

[0078] Figure 9 yes Figure 6 a side view of the middle locking joint from another direction;

[0079] Figure 10 yes Figure 6 A side view of the middle locking joint from another direction;

[0080] Figure 11 is a schematic diagram of a locking ring according to some embodiments of the present application;

[0081] Figure 12 is a schematic diagram of the cooperation between the current collector and the connecting tube according to some embodiments of the present application;

[0082] Figure 13 is a schematic diagram of a current collector unit according to some embodiments of the present application;

[0083] Figure 14 yes Figure 13 A side view of the middle current collector unit;

[0084] Figure 15 yes Figure 14 A partial enlarged view of the middle current collector unit;

[0085] Figure 16 is a schematic diagram of another direction of cooperation between the current collector and the connecting tube according to some embodiments of the present application;

[0086] Figure 17 yes Figure 16 Exploded view of the center fluid collector and connecting pipe.

[0087] Reference numerals:

[0088] 100. Vehicle; 101. Battery device; 102. Controller; 103. Motor;

[0089] 10. Current collector; 1. Mounting channel; 11. First channel; 111. First sidewall; 112. Communication channel; 12. Second channel; 13. Current collector body; 14. Current collector unit; 15. Connecting tube; 2. First locking block; 21. Locking groove; 22. Limiting block; 221. Guide surface; 23. First curved surface;

[0090] 20. Diversion pipe;

[0091] 30. Locking member; 3. Locking joint; 31. First part; 311. Compression block; 312. Compression groove; 313. Anti-slip block; 314. End face; 315. Outer peripheral surface; 32. Second part; 321. Avoidance groove; 3211. Second arcuate surface; 322. Mounting groove; 33. Third part; 331. Annular groove; 332. Sealing ring; 4. Locking ring; 41. Second locking block; 411. Step surface; 412. First step surface; 4121. First end; 4122. Second end; 413. Second step surface; 4131. Third end; 4132. Fourth end; 414. Third step surface; 42. Unlocking groove; 43. Rotating paddle. DETAILED DESCRIPTION

[0092] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0093] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0094] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0095] Currently, market developments indicate that power batteries are becoming increasingly widely used. Power batteries are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in aerospace and other fields. As power battery applications continue to expand, market demand is also growing.

[0096] All power batteries have heat exchange components, which need to be connected by pipelines to transport heat exchange media. The adjacent pipelines are connected by terminals. However, when the power battery is subjected to vibration or impact, gaps are easily generated between the terminals and the pipelines, or the terminals may fall off the pipelines, causing leakage of the heat exchange medium.

[0097] Based on the above considerations, the present application proposes a battery device, which includes a battery cell assembly and a heat exchange assembly. The heat exchange assembly includes a current collector, a heat exchange body, and a locking member. The current collector has a mounting channel. The locking member includes a locking joint. The locking joint is mounted at the end of the heat exchange body. At least a portion of the locking joint is inserted into the mounting channel. The locking joint has a first part and a second part. The first part and the second part are both locked with the current collector. The first part and the second part of the locking joint are both locked with the current collector and are used to lock between the current collector and the heat exchange body to achieve bidirectional locking of the current collector, thereby increasing the locking strength of the locking joint on the current collector and reducing the risk of the heat exchange body falling off the current collector.

[0098] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or various energy storage systems that use the battery device as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0099] For the convenience of explanation, the following embodiments are described by taking an electrical device of one embodiment of the present application as a vehicle 100 as an example. The vehicle 100 may be a new energy vehicle, which may be a pure electric vehicle, a hybrid electric vehicle, or an extended-range vehicle, etc. A battery device 101 is provided inside the vehicle 100, and the battery device 101 may be provided at the bottom, head, or tail of the vehicle 100. The battery device 101 may be used to power the vehicle 100, for example, the battery device 101 may serve as an operating power source for the vehicle 100. The vehicle 100 may further include a controller 102 and a motor 103, and the controller 102 is used to control the battery device 101 to power the motor 103, for example, for starting, navigating, and operating power requirements of the vehicle 100 during driving.

[0100] In some embodiments of the present application, the battery device 101 can serve not only as an operating power source for the vehicle 100 , but also as a driving power source for the vehicle 100 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100 .

[0101] Figure 2 This is a partial schematic diagram of a battery device 101 according to an embodiment of the present application. The battery device 101 includes a housing and a battery cell assembly. The housing itself forms a receiving cavity, within which the battery cell assembly is disposed. The housing includes a bottom guard plate located at the bottom of the battery cell assembly, providing space for the battery cell assembly.

[0102] For example, in the battery device 101, the battery cell assembly includes multiple battery cells, and the multiple battery cells can be connected in series, in parallel, or in a mixed connection. Mixed connection means that the multiple battery cells are both connected in series and in parallel. The multiple battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the battery cell assembly composed of the multiple battery cells is accommodated in the accommodating cavity. Of course, the battery device 101 can also be a battery device 101 module formed by first connecting multiple battery cells in series, in parallel, or in a mixed connection, and then the multiple battery cell modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the accommodating cavity. The battery device 101 can also include other structures. For example, the battery device 101 can also include a busbar component for achieving electrical connection between the multiple battery cells.

[0103] Each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell can be flat, rectangular, or in other shapes.

[0104] Figure 2 is a schematic diagram of a heat exchange component according to some embodiments of the present application. Figure 3 yes Figure 2 A perspective view of the heat exchange component in the middle section, Figure 4 yes Figure 3A partial enlarged view of the heat exchange component in the middle part, Figure 5 is a schematic diagram of the cooperation between the heat exchange body and the locking joint 3 according to some embodiments of the present application. Figure 6 is a schematic diagram of a locking joint 3 according to some embodiments of the present application, Figure 7 yes Figure 6 Exploded view of the middle locking joint 3, Figure 8 yes Figure 6 Side view of the middle locking joint 3, Figure 9 yes Figure 6 A side view of the locking joint 3 from another direction, Figure 10 yes Figure 6 A side view of the middle locking joint 3 from another direction, Figure 11 is a schematic diagram of a locking ring 4 according to some embodiments of the present application, Figure 12 is a schematic diagram of the cooperation between the current collector 10 and the connecting tube 15 according to some embodiments of the present application. Figure 13 is a schematic diagram of a current collector unit 14 according to some embodiments of the present application, Figure 14 yes Figure 13 A side view of the middle current collector unit 14, Figure 15 yes Figure 14 A partial enlarged view of the middle current collector unit 14, Figure 16 is a schematic diagram of another direction of cooperation between the current collector 10 and the connecting tube 15 according to some embodiments of the present application. Figure 17 yes Figure 16 Exploded view of the middle current collector 10 and the connecting pipe 15.

[0105] According to the first aspect of the present application, the battery device 101 includes: a battery cell assembly; a heat exchange assembly, the heat exchange assembly includes a current collector 10, a heat exchange body and a locking member 30, the heat exchange body is arranged on the side of the battery cell assembly, the current collector 10 has an installation channel 1, the locking member 30 includes a locking joint 3, the locking joint 3 is installed at the end of the heat exchange body, at least part of the locking joint 3 is inserted into the installation channel 1, the locking joint 3 has a first part 31 and a second part 32, and the first part 31 and the second part 32 are both locked with the current collector 10.

[0106] Exemplarily, a heat exchange assembly is located on the side of a battery cell assembly to heat or cool the battery cell assembly. The heat exchange assembly includes a current collector 10 and a heat exchange body. Heat exchange medium flows through both the current collector 10 and the heat exchange body. However, the heat exchange medium is susceptible to leakage at the connection between the current collector 10 and the heat exchange body, or the current collector 10 and the heat exchange body are prone to disengagement, resulting in heat exchange medium leakage. A locking member 30 is provided between the current collector 10 and the heat exchange body to lock the current collector 10 and the heat exchange body together and prevent the heat exchange body from falling off the current collector 10.

[0107] The locking member 30 includes a locking joint 3, which is connected between the collector 10 and the heat exchange body. The locking joint 3 is installed at the end of the heat exchange body, and at least a portion of the locking joint 3 is inserted into the installation channel 1 of the collector 10. The entire locking joint 3 can be inserted into the installation channel 1, or a portion of the locking joint 3 can be inserted into the installation channel 1.

[0108] The locking joint 3 includes a first part 31 and a second part 32. The first part 31 and the second part 32 can be both inserted into the installation channel 1, or the first part 31 can be inserted into the installation channel 1, or the second part 32 can be inserted into the installation channel 1, and the first part 31 and the second part 32 are both locked with the collector 10, and are used to lock between the collector 10 and the heat exchange body to achieve two-way locking of the collector 10, so as to increase the locking strength of the locking joint 3 on the collector 10 and reduce the risk of the heat exchange body detaching from the collector 10.

[0109] For example, the first part 31 is inserted into the installation channel 1, and the second part 32 is located outside the installation channel 1. The first part 31 is locked in the installation channel 1, and the second part 32 is locked outside the installation channel 1 to achieve double locking of the current collector 10.

[0110] For another example, the locking joint 3 is made of silicone rubber, and the heat exchange body can be hot-pressed together with the locking joint 3.

[0111] According to the battery device 101 of the present application, the current collector 10 has an installation channel 1, at least part of the locking joint 3 is inserted into the installation channel 1, and the first part 31 and the second part 32 of the locking joint 3 are both locked with the current collector 10, and are used to lock between the current collector 10 and the heat exchange body to achieve two-way locking of the current collector 10, so as to increase the locking strength of the locking joint 3 on the current collector 10, reduce the risk of the heat exchange body falling off the current collector 10, and thereby improve the sealing of the locking joint 3.

[0112] In some embodiments, as Figure 4-Figure 8 As shown, the first part 31 is located in the installation channel 1 , and a plurality of compression blocks 311 are arranged on the circumference of the first part 31 , with a compression groove 312 formed between two adjacent compression blocks 311 .

[0113] For example, in the process of inserting the first part 31 of the locking joint 3 into the mounting channel 1, the multiple compression blocks 311 of the first part 31 are deformed toward the compression groove 312, occupying the space in the compression groove 312, so that the first part 31 is compressed in the circumferential direction so that the first part 31 can be inserted into the mounting channel 1. After the first part 31 is inserted into the mounting channel 1, the multiple compression blocks 311 can generate a reverse force and abut against the inner wall of the mounting channel 1 to form an interference fit with the mounting channel 1, thereby locking the first part 31 of the locking joint 3 with the collector 10.

[0114] For example, four compression blocks 311 are provided, and four corresponding compression slots 312 are provided.

[0115] In this embodiment, a plurality of compression blocks 311 are provided on the circumference of the first part 31, and a compression groove 312 is formed between two adjacent compression blocks 311. When the first part 31 is installed in the installation channel 1, the plurality of compression blocks 311 are deformed toward the compression groove 312 so that the first part 31 can be inserted into the installation channel 1. At the same time, the plurality of compression blocks 311 can generate a reverse force and abut against the inner wall of the installation channel 1 to form an interference fit with the installation channel 1, thereby locking the first part 31 of the locking joint 3 and the current collector 10.

[0116] In some embodiments, as Figure 4-Figure 8 As shown, the first portion 31 is the end portion of the locking joint 3 , and the first portion 31 has an end surface 314 and an outer peripheral surface 315 , and an arc transition is formed between the end surface 314 and the outer peripheral surface 315 .

[0117] For example, when plugging in the locking connector 3, the first part 31 is first plugged into the mounting channel 1, and there is an arc transition between the end face 314 and the outer peripheral surface 315 of the first part 31. In the plugging direction, the size of the end of the first part 31 gradually increases, and the size of the end face 314 of the first part 31 is smaller. When plugging in the first part 31, the end face 314 of the first part 31 is easily plugged into the mounting channel 1, and the arc transition between the end face 314 and the outer peripheral surface 315 can play a guiding role, making it easier for the first part 31 to be plugged into the mounting channel 1.

[0118] In this embodiment, an arc transition is provided between the end face 314 and the outer peripheral surface 315 of the first part 31. When the first part 31 is inserted into the installation channel 1, the arc transition between the end face 314 and the outer peripheral surface 315 can play a guiding role, thereby facilitating the insertion of the first part 31 into the installation channel 1.

[0119] In some embodiments, as Figure 4-Figure 8 、 Figure 17As shown, the mounting channel 1 includes a first channel 11 and a second channel 12. The size of the first channel 11 is larger than that of the second channel 12. The first channel 11 has a first side wall 111 on the side facing the second channel 12. The first part 31 is suitable for being installed in the first channel 11 through the second channel 12. The compression block 311 is suitable for abutting against the first side wall 111 to limit the axial position of the locking joint 3.

[0120] Illustratively, when the first part 31 is plugged in, the first part 31 is installed in the first channel 11 through the second channel 12. Since the size of the first channel 11 is larger than that of the second channel 12, after the compression block 311 of the first part 31 is installed in the first channel 11, the compression block 311 can generate a reverse force, and the compression block 311 in the first channel 11 can be fully reset and partially reset, so that the compression block 311 of the first part 31 abuts against the first side wall 111 of the first channel 11 to limit the axial position of the locking joint 3.

[0121] For example, grease is applied to the first portion 31 , and the locking connector 3 is inserted into the first channel 11 through the second channel 12 .

[0122] In this embodiment, the size of the first channel 11 is set to be larger than the size of the second channel 12, and the first part 31 is installed in the first channel 11 through the second channel 12. The compression block 311 in the first channel 11 can be fully reset and partially reset so that the compression block 311 abuts against the first side wall 111 of the first channel 11 to limit the axial position of the locking joint 3.

[0123] In some embodiments, as Figure 4-Figure 8 As shown, the first portion 31 further includes an anti-dropping block 313 , which is disposed on the outer peripheral surface 315 of the compression block 311 and abuts against the first side wall 111 .

[0124] For example, further, an anti-detachment block 313 is provided on the outer peripheral surface 315 of the compression block 311, and the anti-detachment block 313 also abuts against the first side wall 111, which can provide greater pull-out resistance, further limit the axial position of the locking joint 3, and further reduce the risk of the locking joint 3 detaching from the collector 10.

[0125] In this embodiment, an anti-detachment block 313 is provided on the outer peripheral surface 315 of the shrinkage block. The anti-detachment block 313 abuts against the first side wall 111, further limiting the axial position of the locking joint 3 and further reducing the risk of the locking joint 3 detaching from the current collector 10.

[0126] In some embodiments, as Figure 4-Figure 8As shown, each compression block 311 is provided with a plurality of anti-dropout blocks 313 , and the plurality of anti-dropout blocks 313 are spaced apart along the circumference of the locking joint 3 .

[0127] In this embodiment, multiple anti-detachment blocks 313 are provided, and the multiple anti-detachment blocks 313 are all in contact with the first side wall 111, which can further increase the contact area between the first part 31 and the first side wall 111, increase the pull-out resistance, and further limit the axial position of the locking joint 3, further reducing the risk of the locking joint 3 detaching from the current collector 10.

[0128] For example, each compression block 311 is provided with two anti-drop blocks 313, and each anti-drop block 313 is arranged adjacent to the compression groove 312. When the first part 31 is installed into the installation channel 1, each anti-drop block 313 can be deformed toward the compression groove 312 so that the first part 31 can be inserted into the installation channel 1.

[0129] In some embodiments, as Figure 4-Figure 8 As shown, the locking member 30 also includes a sealing ring 332, and the locking joint 3 also has a third part 33. In the axial direction of the locking joint 3, the third part 33 is connected between the first part 31 and the second part 32. The third part 33 is located in the installation channel 1, and the sealing ring 332 is sheathed on the third part 33.

[0130] Exemplarily, the collector 10 and the heat exchange body contain a flowable heat exchange medium, and a sealing ring 332 is placed on the third part 33. The sealing ring 332 is located between the locking joint 3 and the collector 10 to seal the gap between the collector 10 and the locking joint 3, thereby reducing the risk of leakage of the heat exchange medium.

[0131] Specifically, the first portion 31 is located in the first channel 11 , the third portion 33 is located in the second channel 12 , and the sealing ring 332 is sealed between the circumferential side wall of the second channel 12 and the third portion 33 .

[0132] For example, the sealing ring 332 is made of rubber and is manufactured using a molding, injection molding, calendaring, or extrusion process, so that the sealing ring 332 has good elasticity.

[0133] In this embodiment, a sealing ring 332 is provided, and the third part 33 is located in the installation channel 1. The sealing ring 332 is sheathed on the third part 33 to seal the gap between the current collector 10 and the locking joint 3, thereby reducing the risk of heat exchange medium leakage.

[0134] In some embodiments, as Figure 4-Figure 8 As shown, the third portion 33 further has an annular groove 331 on its circumference, and a portion of the sealing ring 332 is located in the annular groove 331 .

[0135] Illustratively, the annular groove 331 is located between the locking joint 3 and the circumferential side wall of the mounting channel 1 , and a portion of the sealing ring 332 is compressed in the annular groove 331 , which can better perform a sealing function.

[0136] The annular groove 331 provides installation space for the sealing ring 332 and is also used to position the sealing ring 332. After the sealing ring 332 is sleeved on the outer peripheral side of the third part 33, the locking joint 3 is inserted into the installation channel 1. The annular groove 331 can prevent the sealing ring 332 from being displaced from the third part 33 when the third part 33 is inserted.

[0137] For example, the sealing ring 332 is installed into the annular groove 331 reserved in the locking joint 3 through special expansion and guiding tooling.

[0138] In this embodiment, an annular groove 331 is provided on the circumference of the third part 33 , and part of the sealing ring 332 is located in the annular groove 331 . The annular groove 331 can prevent the sealing ring 332 from being displaced from the third part 33 when the third part 33 is inserted.

[0139] In some embodiments, as Figure 4-Figure 8 As shown, there are multiple annular grooves 331 , which are spaced apart along the axial direction of the locking joint 3 , and the number of sealing rings 332 is equal to and corresponds to the number of the annular grooves 331 .

[0140] In this embodiment, a plurality of annular grooves 331 and a plurality of sealing rings 332 are provided to further improve the sealing effect of the sealing rings 332 .

[0141] For example, two annular grooves 331 and two sealing rings 332 are provided.

[0142] In some embodiments, as Figure 4-Figure 7 As shown, in the radial direction of the locking joint 3 , the size of the second portion 32 is larger than the size of the mounting channel 1 , so that the side wall of the second portion 32 abuts against the side wall of the current collector 10 in the axial direction, for limiting the axial position of the locking joint 3 .

[0143] For example, when the locking joint 3 is inserted into the mounting channel 1, since the side of the second part 32 facing the current collector 10 is a flat side wall, the second part 32 is not easily inserted into the mounting channel 1, and the side wall of the second part 32 abuts against the side wall of the current collector 10, which is used to limit the axial position of the locking joint 3.

[0144] In a specific example, the installation channel 1 includes a first channel 11 and a second channel 12, the size of the first channel 11 is larger than the size of the second channel 12, the first channel 11 has a first side wall 111 on the side facing the second channel 12, the first part 31 is suitable for being installed in the first channel 11 through the second channel 12, the compression block 311 abuts against the first side wall 111, and the side wall of the second part 32 abuts against the side wall of the current collector 10. By abutting the compression block 311 against the first side wall 111 of the current collector 10 and the side wall of the second part 32 abutting against the side wall of the current collector 10, the position of the locking joint 3 can be double-limited in the axial direction.

[0145] In this embodiment, the size of the second portion 32 is set to be larger than that of the installation channel 1 so that the side wall of the second portion 32 abuts against the side wall of the current collector 10 to limit the axial position of the locking joint 3 .

[0146] In some embodiments, as Figure 6-Figure 12 As shown, the locking member 30 further includes a first locking portion, and the current collector 10 has a second locking portion. The first locking portion is mounted on the second portion 32 , and the first locking portion and the second locking portion cooperate to limit the rotation of the locking joint 3 .

[0147] For example, the first locking part can be a retaining ring, and the second locking part can be a protrusion extending toward the second part 32. The retaining ring surrounds the outer peripheral side of the protrusion and the second part 32, and is used to clamp the protrusion and the second part 32 to prevent the locking joint 3 from rotating, so that the sealing joint is not easy to fall off under vibration and impact conditions, which can improve the sealing safety of the sealing joint.

[0148] This embodiment sets a first locking portion and a second locking portion to cooperate to limit the rotation of the locking joint 3, which can limit the position of the locking joint 3 in the radial direction, so that the locking joint 3 is not easy to fall off under vibration or impact conditions, and the sealing performance of the locking joint 3 can be improved.

[0149] In some embodiments, as Figure 6-Figure 12 As shown, the first locking part includes a locking ring 4, and the second locking part includes a first locking block 2. The first locking block 2 extends to the radial outside of the second part 32, and the locking ring 4 surrounds the outside of the first locking block 2. In the rotation direction of the locking ring 4, the locking ring 4 has a locking position and an unlocking position. In the locking position, the locking ring 4 is locked with the first locking block 2, and in the unlocking position, the locking ring 4 is unlocked with the first locking block 2, and the locking joint 3 can rotate in the circumferential direction.

[0150] For example, in the unlocked position, the locking ring 4 is unlocked from the first locking block 2, and the locking joint 3 can rotate in the circumferential direction; in the locked position, the locking ring 4 is locked with the first locking block 2 to limit the circumferential rotation of the locking joint 3. By rotating the locking ring 4, the locking ring 4 can switch between the unlocked position and the locked position.

[0151] For example, a plurality of first locking blocks 2 may be provided, and the plurality of first locking blocks 2 may be arranged around the circumference of the second portion 32 , and the locking ring 4 may be locked with the plurality of first locking blocks 2 .

[0152] In this embodiment, the locking ring 4 has a locking position and an unlocking position. In the unlocking position, the locking ring 4 is unlocked from the first locking block 2, and the locking joint 3 can rotate in the circumferential direction; in the locking position, the locking ring 4 is locked with the first locking block 2, which is used to limit the circumferential rotation of the locking joint 3.

[0153] In some embodiments, as Figure 6-Figure 12 As shown, in the circumferential direction of the locking ring 4, the inner wall of the locking ring 4 is provided with a second locking block 41 and an unlocking groove 42. In the unlocking position, the first locking block 2 is located in the unlocking groove 42. In the locking position, the first locking block 2 abuts against the second locking block 41.

[0154] Exemplarily, the locking joint 3 is inserted into the mounting channel 1, the first locking block 2 extends to the radially outer side of the second part 32, the locking ring 4 is sleeved on the outer peripheral side of the first locking block 2 and the locking joint 3, and the unlocking groove 42 is used to avoid the first locking block 2. The first locking block 2 is inserted into the unlocking groove 42, so that the locking ring 4 can be installed to the outer peripheral side of the first locking block 2 and the locking joint 3; by rotating the locking ring 4, the second locking block 41 can be rotated onto the first locking block 2, which is used to lock the locking joint 3 in the circumferential direction.

[0155] For example, the second locking block 41 extends toward the axis of the locking ring 4 compared to the unlocking groove 42 .

[0156] In this embodiment, a second locking block 41 and an unlocking groove 42 are provided on the inner wall of the locking ring 4. The unlocking groove 42 is used to avoid the first locking block 2. The first locking block 2 is inserted into the unlocking groove 42, so that the locking ring 4 can be installed to the outer peripheral side of the first locking block 2 and the locking joint 3. The first locking block 2 abuts against the second locking block 41 to lock the locking joint 3 in the circumferential direction.

[0157] In some embodiments, as Figure 6-Figure 12 As shown, a plurality of first locking blocks 2 are provided, and the plurality of first locking blocks 2 are arranged around the circumference of the second portion 32 .

[0158] Illustratively, there can be one second locking block 41 and one unlocking groove 42. When the locking ring 4 is installed, multiple first locking blocks 2 can be located in the unlocking groove 42. When the locking ring 4 is rotated, one first locking block 2 can be in contact with the second locking block 41, and the remaining first locking blocks 2 can be located in the unlocking groove 42; or part of the first locking blocks 2 can be in contact with the second locking block 41, and the remaining first locking blocks 2 can be located in the unlocking groove 42; or all of the first locking blocks 2 can be in contact with the second locking block 41.

[0159] By providing a plurality of first locking blocks 2 , the number of the first locking blocks 2 to be locked with the second locking block 41 can be selected according to actual needs to select the locking strength between the first locking block 2 and the second locking block 41 .

[0160] In this embodiment, by providing a plurality of first locking blocks 2 , the number of first locking blocks 2 to be locked with the second locking block 41 can be selected according to actual needs to select the locking strength between the first locking block 2 and the second locking block 41 .

[0161] In some embodiments, as Figure 6-Figure 12 As shown, the number of the second locking blocks 41 is equal to and corresponds to the first locking blocks 2 , and the plurality of second locking blocks 41 are arranged at intervals along the inner wall of the locking ring 4 , and an unlocking groove 42 is formed between two adjacent second locking blocks 41 .

[0162] Exemplarily, there are multiple second locking blocks 41. When the locking ring 4 is rotated, a second locking block 41 abuts and locks against a corresponding first locking block 2, so that multiple first locking blocks 2 and multiple second locking blocks 41 can be locked to achieve multiple locking of the current collector 10 and the locking joint 3 in the circumferential direction, so as to further improve the locking strength of the current collector 10 and the locking joint 3.

[0163] When installing the locking ring 4, an unlocking groove 42 is used to avoid a first locking block 2. The first locking block 2 is inserted into the corresponding unlocking groove 42, allowing the locking ring 4 to be installed on the outer circumference of the first locking block 2 and the locking joint 3. After installation, the locking ring 4 is rotated, and the multiple second locking blocks 41 respectively abut and lock with the corresponding first locking blocks 2, thereby locking the current collector 10 and the locking joint 3 in the circumferential direction. When unlocking is required, the locking ring 4 is rotated, and the multiple first locking blocks 2 respectively rotate into the corresponding unlocking grooves 42, thereby unlocking the current collector 10 and the locking joint 3 in the circumferential direction.

[0164] For example, four first locking blocks 2 are provided, four second locking blocks 41 are provided, and an unlocking groove 42 is formed between two adjacent second locking blocks 41 . Four unlocking grooves 42 are also provided.

[0165] In this embodiment, a plurality of second locking blocks 41 are provided, which are equal in number and correspond one to one to the plurality of first locking blocks 2. When in the locking position, the first locking blocks 2 at multiple locations and the second locking blocks 41 at multiple locations can be locked, so as to achieve multiple locking of the current collector 10 and the locking joint 3 in the circumferential direction, so as to further improve the locking strength of the current collector 10 and the locking joint 3.

[0166] In some embodiments, as Figure 11-13 As shown, the first locking block 2 has a locking groove 21 on the side facing away from the second part 32, and the locking groove 21 passes through the first locking block 2 along the circumferential direction. In the locked position, the locking ring 4 is circumferentially inserted into the locking groove 21, and the second locking block 41 abuts against the bottom wall of the locking groove 21 for locking.

[0167] Illustratively, when in the unlocked position, the first locking block 2 is located in the unlocking groove 42, and the locking ring 4 is rotated. When the locking ring 4 is rotated from the unlocked position to the locked position, the locking ring 4 is circumferentially penetrated into the locking grooves 21 of multiple first locking blocks 2, and the two side walls of the locking grooves 21 are respectively located on the axial outside of the second locking block 41, which can axially limit the movement of the second locking block 41, and thus axially limit the position of the current collector 10 and the locking joint 3; and the second locking block 41 of the locking ring 4 is abutted and locked with the bottom wall of the locking groove 21, which can circumferentially lock the locking joint 3 and the current collector 10.

[0168] In this embodiment, a locking groove 21 is provided on the side of the first locking block 2 facing away from the second part 32. In the locking position, the locking ring 4 is circumferentially inserted into the locking groove 21, and the second locking block 41 abuts against the bottom wall of the locking groove 21 for locking. Not only can the locking joint 3 and the current collector 10 be locked in the circumferential direction, but the locking groove 21 can also limit the position of the current collector 10 and the locking joint 3 in the axial direction.

[0169] In some embodiments, as Figure 11-13 As shown, a limiting block 22 is provided on the bottom wall of the locking groove 21 , and the second locking block 41 abuts against the limiting block 22 for locking.

[0170] Illustratively, in the circumferential direction, the two ends of the limit block 22 are retracted into the locking groove 21, that is, in the circumferential direction, there is a spacing space between the two ends of the limit block 22 and the outer wall of the locking groove 21, and the limit block 22 is arranged toward the outer wall of the locking ring 4. When the second locking block 41 abuts and locks with the limit block 22 in the locking groove 21, the limit block 22 can increase the locking strength of the second locking block 41 and the locking ring 4.

[0171] In this embodiment, a limiting block 22 is provided on the bottom wall of the locking groove 21 , and the second locking block 41 abuts against the limiting block 22 for locking. The limiting block 22 can increase the locking strength between the second locking block 41 and the locking ring 4 .

[0172] In some embodiments, as Figure 11-13 As shown, the limiting block 22 has a guide surface 221 , and the guide surface 221 is tilted to guide the limiting block 22 to move toward the second locking block 41 .

[0173] For example, when the second locking block 41 is in abutment and locked with the limit block 22, it is in an interference fit state, and the second locking block 41 is difficult to move onto the limit block 22. A guide surface 221 is provided on the limit block 22, and the guide surface 221 is used to guide the second locking block 41 to move toward the limit block 22, so that the second locking block 41 can be easily moved onto the limit block 22, thereby saving effort when rotating the locking ring 4.

[0174] For example, a guide surface 221 is provided on one side surface of the limit block 22. When the locking ring 4 is rotated, the position of the guide surface 221 limits the rotation direction of the locking ring 4, and the second locking block 41 can only rotate toward the side of the limit block 22 with the guide surface 221.

[0175] In this embodiment, the guide surface 221 is provided to guide the limiting block 22 to move toward the second locking block 41 , so that the second locking block 41 can be easily moved to the limiting block 22 , which can save effort when rotating the locking ring 4 .

[0176] In some embodiments, as Figure 11-13 As shown, the second locking block 41 has a plurality of step surfaces 411 on a side facing the first locking block 2 , and the plurality of step surfaces 411 are staggered along the radial direction of the locking ring 4 .

[0177] Exemplarily, multiple step surfaces 411 are staggered along the radial direction of the locking ring 4, and multiple step surfaces 411 may protrude toward the axis of the locking ring 4 in sequence. When the locking ring 4 is rotated, the step surface 411 closest to the outer peripheral wall of the locking ring 4 contacts the second locking block 41, and then the locking ring 4 continues to be rotated, and the next step surface 411 locks and abuts against the second locking block 41.

[0178] The side of the second locking block 41 facing the first locking block 2 is set to multiple step surfaces 411, and the multiple step surfaces 411 are staggered along the radial direction of the locking ring 4. The second locking block 41 contacts the multiple step surfaces 411 in sequence, and the multiple step surfaces 411 protrude toward the axis of the locking ring 4 in sequence on the side facing the axis of the locking ring 4. The multiple step surfaces 411 can play a guiding role, and also make the first locking block 2 locked with one of the step surfaces 411.

[0179] For example, the plurality of step surfaces 411 may include three, namely the first step surface 412, the second step surface 413 and the third step surface 414, wherein the first step surface 412 and the second step surface 413 are respectively projected toward the axis of the locking ring 4 on one side thereof, and the second step surface 413 is projected toward the axis of the locking ring 4 on the other side thereof relative to the third step surface 414. When the locking ring 4 is rotated, the first step surface 412 first contacts the first locking block 2, and the first step surface 412 can play a guiding role. When the locking ring 4 is rotated further, the second step surface 413 contacts the first locking block 2 again, and the second step surface 413 can be locked with the first locking block 2. When the locking ring 4 is rotated further, the third step surface 414 contacts the first locking block 2 again, and the degree of locking between the third step surface 414 and the first locking block 2 is relatively low.

[0180] In a specific example, the side facing the limit block 22 is a guide surface 221, and the first step surface 412 is guided by the guide surface 221 to move onto the limit block 22. The first step surface 412 is a slowly rising step surface 411. The locking ring 4 continues to rotate, and the second step surface 413 of the first locking block 2 rotates to the limit block 22, which is used to lock the second step surface 413 with the limit block 22.

[0181] In this embodiment, a plurality of step surfaces 411 are set on the side of the second locking block 41 facing the first locking block 2, and the plurality of step surfaces 411 are staggered along the radial direction of the locking ring 4. The plurality of step surfaces 411 protrude toward the axis of the locking ring 4 on one side facing the axis of the locking ring 4 in sequence. The second locking block 41 contacts the plurality of step surfaces 411 in sequence. The plurality of step surfaces 411 can play a guiding role, and also enable the first locking block 2 to be locked with one of the step surfaces 411.

[0182] In some embodiments, as Figure 11-Figure 15 As shown, the multiple step surfaces 411 include a first step surface 412. In the rotation direction of the locking ring 4, the two ends of the first step surface 412 are respectively a first end 4121 and a second end 4122. The second end 4122 is arranged close to the axis of the locking ring 4 relative to the first end 4121.

[0183] Illustratively, in the rotation direction of the locking ring 4, the first step surface 412 is a slowly rising step surface 411. The first step surface 412 first contacts the first locking block 2 to guide the rotation of the locking ring 4, and slowly locks the first step surface 412 and the second locking block 41.

[0184] In this embodiment, in the rotation direction of the locking ring 4, the two ends of the first step surface 412 are respectively the first end 4121 and the second end 4122, and the second end 4122 is arranged close to the axis of the locking ring 4 relative to the first end 4121. The first step surface 412 first contacts the first locking block 2 to guide the rotation of the locking ring 4, and slowly locks the first step surface 412 and the second locking block 41.

[0185] In some embodiments, as Figure 11-Figure 15 As shown, the multiple step surfaces 411 include a second step surface 413. In the rotation direction of the locking ring 4, the second step surface 413 is located on the downstream side of the first step surface 412. The two ends of the second step surface 413 are respectively a third end 4131 and a fourth end 4132. The fourth end 4132 is arranged close to the axis of the locking ring 4 relative to the third end 4131, the second end 4122 is arranged close to the axis of the locking ring 4 relative to the third end 4131, and the fourth end 4132 is arranged close to the axis of the locking ring 4 relative to the second end 4122.

[0186] Illustratively, in the rotation direction of the locking ring 4, the second step surface 413 is a slowly rising step surface 411, and the third end 4131 of the second step surface 413 is closer to the outer peripheral wall of the locking ring 4 relative to the second end 4122 of the first step surface 412. When the second step surface 413 is locked with the first locking block 2, the side surface of the first step surface 412 facing the second step surface 413 can limit the circumferential position of the first locking block 2; and the fourth end 4132 of the second step surface 413 is closer to the axis of the locking ring 4 relative to the second end 4122 of the first step surface 412. When the second step surface 413 is locked with the first locking block 2, the locking strength of the second step surface 413 and the first locking block 2 is stronger.

[0187] In this embodiment, the second step surface 413 is provided to lock with the first locking block 2. The side surface of the first step surface 412 facing the second step surface 413 can limit the circumferential position of the first locking block 2, and also make the locking strength between the second step surface 413 and the first locking block 2 stronger.

[0188] In some embodiments, as Figure 2-Figure 7 As shown, the multiple step surfaces 411 include a third step surface 414. In the rotation direction of the locking ring 4, the third step surface 414 is located on the downstream side of the second step surface 413. The third step surface 414 is an arc-shaped surface. The axis of the third step surface 414 is colinear with the axis of the locking ring 4. The fourth end 4132 is arranged close to the axis of the locking ring 4 relative to the third step surface 414.

[0189] For example, the fourth end 4132 of the second step surface 413 is arranged closer to the axis of the locking ring 4 relative to the third step surface 414, and the locking ring 4 is rotated.

[0190] When locking the second locking block 41 and the first locking block 2, the locking ring 4 is rotated, and the first step surface 412 of the second locking block 41 first contacts the first locking block 2. The locking ring 4 is further rotated, and the second step surface 413 of the second locking block 41 then contacts the first locking block 2, which is used to lock the second locking block 41 and the first locking block 2. When unlocking is required, the locking ring 4 is further rotated, and the third step surface 414 of the second locking block 41 contacts the first locking block 2. At this time, the second locking block 41 and the first locking block 2 are not completely unlocked. The locking ring 4 is further rotated, and the second locking block 41 rotates to the unlocking groove 42, and the second locking block 41 and the first locking block 2 are unlocked.

[0191] In this embodiment, a third step surface 414 is provided, and the third step surface 414 is located on the downstream side of the second step surface 413 . The fourth end 4132 is provided near the axis of the locking ring 4 relative to the third step surface 414 to limit the position of the locking ring 4 .

[0192] In some embodiments, as Figure 6-Figure 8 、 Figure 12-15 As shown, the second portion 32 is provided with an avoidance groove 321 , and the first locking block 2 is located in the avoidance groove 321 .

[0193] Illustratively, the avoidance groove 321 extends axially along the second part 32, and the first locking block 2 is located in the avoidance groove 321. When the first locking block 2 and the second part 32 are locked by the locking ring 4, the first locking block 2 is located between the circumferential side walls of the avoidance groove 321. The circumferential side walls of the avoidance groove 321 can circumferentially limit the movement of the first locking block 2, which is used to further limit the circumferential position of the first locking block 2, and further limit the circumferential position of the current collector 10 and the locking joint 3.

[0194] In this embodiment, an avoidance groove 321 is provided in the second portion 32 , and the first locking block 2 is located in the avoidance groove 321 , so as to further limit the circumferential position of the first locking block 2 , thereby further limiting the circumferential position of the current collector 10 and the locking joint 3 .

[0195] In some embodiments, as Figure 6-Figure 8 、 Figure 12-15 As shown, the side surface of the first locking block 2 facing the second portion 32 is a first arcuate surface 23 , and the groove surface of the avoidance groove 321 is a second arcuate surface 3211 whose shape is adapted to the first arcuate surface 23 .

[0196] In this embodiment, the first arcuate surface 23 and the second arcuate surface 3211 are provided to avoid stress concentration, and the processing and manufacturing of the first locking block 2 and the avoidance groove 321 are also facilitated.

[0197] In some embodiments, as Figure 6-Figure 8 、 Figure 12-15 As shown, the second portion 32 has a mounting groove 322 on its circumference, and the locking ring 4 is rotatably disposed in the mounting groove 322 .

[0198] Illustratively, the mounting groove 322 can limit the locking ring 4 in the axial direction of the locking joint 3. When the locking ring 4 rotates, when the first locking block 2 of the locking ring 4 is locked with the limiting block 22, the locking ring 4 may be displaced in the axial direction, and the mounting groove 322 can limit the locking ring 4 in the axial direction, so that the locking ring 4 can be locked with the first locking block 2.

[0199] For example, the locking ring 4 is installed into the installation groove 322 of the second portion 32 through special expansion and guiding tooling.

[0200] In this embodiment, a mounting groove 322 is provided on the circumference of the second portion 32 , and the locking ring 4 is rotatably provided in the mounting groove 322 . The mounting groove 322 can limit the locking ring 4 in the axial direction so that the locking ring 4 can only rotate along the circumferential direction.

[0201] In some embodiments, as Figure 6-Figure 7 、 Figure 11 As shown, a rotating paddle 43 is further provided on the outer side of the locking ring 4 .

[0202] Exemplarily, the rotating paddle 43 is an extension piece connected to the outside of the locking ring 4. When rotating the locking ring 4, by turning the rotating paddle 43, the effort of rotating the locking ring 4 can be saved, making it easier for the user to rotate the locking ring 4.

[0203] In this embodiment, a rotating paddle 43 is provided on the outer side of the locking ring 4. The locking ring 4 can be rotated by turning the rotating paddle 43, which can save effort when rotating the locking ring 4 and is convenient for users to use.

[0204] In some embodiments, as Figure 3-Figure 4 、 Figure 16-17 As shown, there are multiple installation channels 1 , and the first channels 11 of the multiple installation channels 1 are connected to form a communication channel 112 .

[0205] Illustratively, the connecting channel 112 is used to divert the heat exchange medium into the plurality of second channels 12 , and the heat exchange medium in the plurality of second channels 12 merges into the connecting channel 112 , so as to achieve diversion or merging of the heat exchange medium.

[0206] In a specific example, the current collector 10 includes a current collector body 13 and a plurality of current collector units 14. The current collector body 13 has a communication channel 112 therein. Each current collector unit 14 has a second channel 12 therein. The plurality of current collector units 14 are installed in the communication channel 112 so that the communication channel 112 is in communication with the second channel 12. A connecting pipe 15 is provided on the side of the current collector body 13 facing the main water inlet or main water outlet for connecting to the main water inlet or main water outlet.

[0207] The connecting pipe 15 can be machined or injection molded. If the connecting pipe 15 is a metal machined part, it can be welded to the current collector 10 by brazing. If the connecting pipe 15 is an injection molded part, it can also be welded to the current collector 10 by injection welding.

[0208] In this embodiment, the current collector 10 is provided with a plurality of installation channels 1 , and the first channels 11 of the plurality of installation channels 1 are connected to form a communication channel 112 , which is used to realize the diversion or merging of the heat exchange medium.

[0209] In some embodiments, the heat exchange body includes at least one heat exchange tube, and the heat exchange tube is bent at a side surface of the battery cell assembly.

[0210] For example, the number of heat exchange tubes can be one, two, three, or more, and the number of heat exchange tubes can be designed according to the size of the battery cell assembly. The heat exchange tube structure is simple, the production cost is low, and the shape of the heat exchange tube can be well changed.

[0211] The shapes of the heat exchange tubes can include various types, for example, the heat exchange tubes can be round tubes or flat tubes, etc. At the same time, the inner side of each heat exchange tube defines a heat exchange channel for the circulation of fluid; the shapes of the heat exchange channel defined by the heat exchange tubes can also include various types, for example, U-shaped heat exchange channel, meandering heat exchange channel, etc.

[0212] In this embodiment, the heat exchange body includes at least one heat exchange tube, and the heat exchange tube is bent at the side of the battery cell assembly, so that the structure of the heat exchange body is simple and the production cost is low.

[0213] In some embodiments, the heat exchange body includes a flow guide tube 20 and a heat exchange component. The flow guide tube 20 is connected between the locking joint 3 and the heat exchange component. The heat exchange component is provided on the side of the battery cell assembly.

[0214] For example, the heat exchange medium can be transported to the flow conduit 20 through the current collector 10 , and the flow conduit 20 can transport the heat exchange medium to the heat exchange element for heat exchange of the battery cell assembly.

[0215] For example, there may be multiple flow guide pipes 20 and multiple heat exchange elements. The multiple flow guide pipes 20 may be connected to the heat exchange elements in a corresponding manner, or multiple flow guide pipes 20 may be connected to one heat exchange element.

[0216] In this embodiment, the heat exchange body includes a flow guide pipe 20 and a heat exchange element. The flow guide pipe 20 is used to divert or merge the heat exchange element.

[0217] In some embodiments, the flow guide tube 20 is a straight tube or a bent tube.

[0218] For example, the flow guide tubes 20 are all made of nylon.

[0219] In this embodiment, by designing the flow guide tube 20 as a straight tube or a bent tube, the direction of the flow guide tube 20 can be adjusted according to the internal space of the battery device 101, thereby saving the internal space of the battery device 101 and improving the overall energy density of the battery device 101.

[0220] In some embodiments, the heat exchange element is a heat exchange plate.

[0221] The heat exchange plate can fit tightly to the battery cell assembly, allowing the heat exchange plate to better exchange heat with the battery cell assembly. Multiple heat exchange channels are designed in the heat exchange plate, and the heat exchange channels can be set to be straight or curved.

[0222] In this embodiment, the heat exchange member is a heat exchange plate, which can be closely attached to the battery cell assembly, so that the heat exchange plate can better exchange heat with the battery cell assembly. According to the second aspect of the present application, the power device includes: the battery device 101 of the first aspect of the present application.

[0223] According to the electrical device of the present application, since the performance of the battery device 101 is improved, the working power performance of the electrical device is improved.

[0224] The following will refer to Figures 1-17 A battery device 101 according to a specific embodiment of the present application is described.

[0225] Battery device 101 includes a battery cell assembly and a heat exchange assembly. The heat exchange assembly is located on the side of the battery cell assembly and includes a current collector 10, a heat exchange body, and a locking member 30. The current collector 10 has a mounting channel 1, which includes a first channel 11 and a second channel 12. The current collector 10 includes a current collector body 13 and four current collector units 14. The current collector body 13 has multiple connecting channels 112 connected to the first channels 11. Each current collector unit 14 has a second channel 12. Multiple current collector units 14 are installed in the connecting channels 112 to connect the connecting channels 112 with the second channels 12. A connecting pipe 15 is provided on the side of the current collector body 13 facing the main water inlet or main water outlet for connecting to the main water inlet or main water outlet.

[0226] The first channel 11 is larger than the second channel 12. The locking joint 3 comprises a first portion 31, a third portion 33, and a second portion 32, which are connected in sequence. Four compression blocks 311 and eight anti-dropout blocks 313 are arranged circumferentially around the first portion 31. The anti-dropout blocks 313 are located on the outer circumferential surface 315 of the compression blocks 311. Each compression block 311 is equipped with two anti-dropout blocks 313, which are spaced apart along the circumference of the locking joint 3. A compression groove 312 is formed between adjacent compression blocks 311. The first portion 31 is mounted within the first channel 11 through the second channel 12. The first channel 11 has a first sidewall 111 on the side facing the second channel 12. Both the compression blocks 311 and the anti-dropout blocks 313 abut against the first sidewall 111. In the radial direction of the locking joint 3, the second portion 32 is larger than the mounting channel 1, so that the sidewalls of the second portion 32 abut against the sidewalls of the current collector 10 in the axial direction, thereby limiting the axial position of the locking joint 3.

[0227] The third portion 33 is located in the second channel 12, and the locking member 30 also includes a sealing ring 332. The third portion 33 also has an annular groove 331 in the circumference. Part of the sealing ring 332 is located in the annular groove 331. There are two annular grooves 331. The two annular grooves 331 are arranged at intervals along the axial direction of the locking joint 3. The number of sealing rings 332 is equal to the number of annular grooves 331 and corresponds one to one.

[0228] The locking member 30 also includes a locking ring 4, and the second part 32 has a mounting groove 322 in the circumferential direction. The locking ring 4 is rotatably arranged in the mounting groove 322. The current collector 10 has a first locking block 2, and the first locking block 2 extends to the radial outside of the second part 32. The second part 32 is provided with an avoidance groove 321, and the first locking block 2 is located in the avoidance groove 321.

[0229] The side of the first locking block 2 facing the second portion 32 is a first arcuate surface 23, and the groove surface of the avoidance groove 321 is a second arcuate surface 3211 that matches the shape of the first arcuate surface 23. The locking ring 4 surrounds the outside of the first locking block 2, and a rotating paddle 43 is also provided on the outside of the locking ring 4.

[0230] On the circumference of the locking ring 4, four second locking blocks 41 are provided on the inner wall of the locking ring 4, and an unlocking groove 42 is provided between two adjacent second locking blocks 41. The first locking block 2 has a locking groove 21 on the side facing away from the second part 32. The locking groove 21 penetrates the first locking block 2 along the circumferential direction. The locking ring 4 is circumferentially penetrated in the locking groove 21. A limit block 22 is provided on the bottom wall of the locking groove 21. The limit block 22 has a guide surface 221. The guide surface 221 is inclined to guide the limit block 22 to move toward the second locking block 41.

[0231] The second locking block 41 has a first step surface 412, a second step surface 413 and a third step surface 414 on the side facing the first locking block 2. In the rotation direction of the locking ring 4, the second step surface 413 is located on the downstream side of the first step surface 412, and the third step surface 414 is located on the downstream side of the second step surface 413. The two ends of the first step surface 412 are respectively a first end 4121 and a second end 4122, the second end 4122 is arranged relative to the first end 4121 and close to the axis of the locking ring 4, the two ends of the second step surface 413 are respectively a third end 4131 and a fourth end 4132, the fourth end 4132 is arranged relative to the third end 4131 and close to the axis of the locking ring 4, the second end 4122 is arranged relative to the third end 4131 and close to the axis of the locking ring 4, the fourth end 4132 is arranged relative to the second end 4122 and close to the axis of the locking ring 4, the third step surface 414 is an arcuate surface, the axis of the third step surface 414 is collinear with the axis of the locking ring 4, and the fourth end 4132 is arranged relative to the third step surface 414 and close to the axis of the locking ring 4.

[0232] Apply grease to the first portion 31 of the locking joint 3 and insert the locking joint 3 through the second passage 12 into the first passage 11, with the compression block 311 and the anti-dropout block 313 of the locking joint 3 abutting against the first sidewall 111 of the first passage 11. Once fully inserted, rotate the locking ring 4 approximately 45° from the unlocked position to the locked position, locking the stopper 22 of the locking ring 4 into engagement with the second stepped surface 413 of the first locking block 2. To unlock, rotate the locking ring 4 until the stopper 22 is located within the unlocking groove 42.

[0233] In the description of this specification, reference to the terms "some embodiments," "optionally," "further," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0234] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device (101), characterized in that: include: Battery cell assembly; A heat exchange assembly, comprising a current collector (10), a heat exchange body, and a locking member (30), wherein the heat exchange body is arranged on a side of the battery cell assembly, the current collector (10) has a mounting channel (1), and the locking member (30) comprises a locking joint (3), wherein the locking joint (3) is mounted at an end of the heat exchange body, and at least a portion of the locking joint (3) is inserted into the mounting channel (1), and the locking joint (3) has a first portion (31) and a second portion (32), wherein both the first portion (31) and the second portion (32) are locked with the current collector (10); The first part (31) is located in the installation channel (1), a plurality of compression blocks (311) are arranged in the circumferential direction of the first part (31), and a compression groove (312) is formed between two adjacent compression blocks (311). The installation channel (1) includes a first channel (11) and a second channel (12), the size of the first channel (11) is larger than the size of the second channel (12), and the first channel (11) has a first side wall (111) on the side facing the second channel (12). The first part (31) is suitable for being installed in the first channel (11) through the second channel (12), and the compression block (311) is suitable for abutting against the first side wall (111) to limit the axial position of the locking joint (3); In the radial direction of the locking joint (3), the size of the second part (32) is larger than the size of the mounting channel (1), so that the side wall of the second part (32) abuts against the side wall of the current collector (10) in the axial direction, thereby limiting the axial position of the locking joint (3).

2. The battery device (101) according to claim 1, characterized in that The first part (31) is the end of the locking joint (3), and the first part (31) has an end surface (314) and an outer peripheral surface (315), and a circular arc transition is formed between the end surface (314) and the outer peripheral surface (315).

3. The battery device (101) according to claim 1, characterized in that The first part (31) further includes an anti-dropping block (313), the anti-dropping block (313) being arranged on the outer peripheral surface (315) of the compression block (311), and the anti-dropping block (313) being in contact with the first side wall (111).

4. The battery device (101) according to claim 3, characterized in that Each compression block (311) is provided with a plurality of anti-dropout blocks (313), and the plurality of anti-dropout blocks (313) are spaced apart along the circumference of the locking joint (3).

5. The battery device (101) according to claim 1, characterized in that The locking member (30) further includes a sealing ring (332), and the locking joint (3) further includes a third part (33). In the axial direction of the locking joint (3), the third part (33) is connected between the first part (31) and the second part (32), the third part (33) is located in the installation channel (1), and the sealing ring (332) is sheathed on the third part (33).

6. The battery device (101) according to claim 5, characterized in that The third portion (33) further has an annular groove (331) in the circumferential direction, and a portion of the sealing ring (332) is located in the annular groove (331).

7. The battery device (101) according to claim 6, characterized in that There are multiple annular grooves (331), and the multiple annular grooves (331) are arranged at intervals along the axial direction of the locking joint (3). The number of the sealing rings (332) is equal to the number of the annular grooves (331) and corresponds one to one.

8. The battery device (101) according to claim 1, characterized in that The locking member (30) further comprises a first locking portion, the current collector (10) has a second locking portion, the first locking portion is located on the second portion (32), and the first locking portion and the second locking portion cooperate to limit the rotation of the locking joint (3).

9. The battery device (101) according to claim 8, characterized in that The first locking portion includes a locking ring (4), the second locking portion includes a first locking block (2), the first locking block (2) extends to the radially outer side of the second portion (32), the locking ring (4) surrounds the outer side of the first locking block (2), and in the rotation direction of the locking ring (4), the locking ring (4) has a locking position and an unlocking position. In the locking position, the locking ring (4) is locked with the first locking block (2), and in the unlocking position, the locking ring (4) is unlocked with the first locking block (2).

10. The battery device (101) according to claim 9, characterized in that In the circumferential direction of the locking ring (4), the inner wall of the locking ring (4) is provided with a second locking block (41) and an unlocking groove (42); in the unlocking position, the first locking block (2) is located in the unlocking groove (42); in the locking position, the first locking block (2) abuts against the second locking block (41).

11. The battery device (101) according to claim 10, characterized in that A plurality of the first locking blocks (2) are provided, and the plurality of the first locking blocks (2) are arranged around the circumference of the second part (32).

12. The battery device (101) according to claim 11, characterized in that The number of the second locking blocks (41) is equal to and corresponds to the number of the first locking blocks (2). The plurality of second locking blocks (41) are arranged at intervals along the inner wall of the locking ring (4), and the unlocking groove (42) is formed between two adjacent second locking blocks (41).

13. The battery device (101) according to claim 10, characterized in that The first locking block (2) has a locking groove (21) on a side facing away from the second part (32), and the locking groove (21) circumferentially penetrates the first locking block (2). In the locking position, the locking ring (4) is circumferentially penetrated into the locking groove (21) and abuts against the bottom wall of the locking groove (21) for locking.

14. The battery device (101) according to claim 13, characterized in that A limiting block (22) is provided on the bottom wall of the locking groove (21), and the second locking block (41) abuts against the limiting block (22) for locking.

15. The battery device (101) according to claim 14, characterized in that The limiting block (22) has a guide surface (221), and the guide surface (221) is arranged at an angle to guide the limiting block (22) to move toward the second locking block (41).

16. The battery device (101) according to claim 10, characterized in that The second locking block (41) has a plurality of step surfaces (411) on a side facing the first locking block (2), and the plurality of step surfaces (411) are staggered along the radial direction of the locking ring (4).

17. The battery device (101) according to claim 16, characterized in that The plurality of step surfaces (411) include a first step surface (412). In the rotation direction of the locking ring (4), the two ends of the first step surface (412) are respectively a first end (4121) and a second end (4122), and the second end (4122) is arranged close to the axis of the locking ring (4) relative to the first end (4121).

18. The battery device (101) according to claim 17, characterized in that The plurality of step surfaces (411) include a second step surface (413), and in the rotation direction of the locking ring (4), the second step surface (413) is located on the downstream side of the first step surface (412), and the two ends of the second step surface (413) are respectively a third end (4131) and a fourth end (4132), and the fourth end (4132) is arranged close to the axis of the locking ring (4) relative to the third end (4131), and the second end (4122) is arranged close to the axis of the locking ring (4) relative to the third end (4131), and the fourth end (4132) is arranged close to the axis of the locking ring (4) relative to the second end (4122).

19. The battery device (101) according to claim 18, characterized in that The plurality of step surfaces (411) include a third step surface (414). In the rotation direction of the locking ring (4), the third step surface (414) is located on the downstream side of the second step surface (413). The third step surface (414) is an arc-shaped surface. The axis of the third step surface (414) is collinear with the axis of the locking ring (4). The fourth end (4132) is arranged close to the axis of the locking ring (4) relative to the third step surface (414).

20. The battery device (101) according to claim 9, characterized in that The second part (32) is provided with an avoidance groove (321), and the first locking block (2) is located in the avoidance groove (321).

21. The battery device (101) according to claim 20, characterized in that The side surface of the first locking block (2) facing the second part (32) is a first arcuate surface (23), and the groove surface of the avoidance groove (321) is a second arcuate surface (3211) that is adapted to the shape of the first arcuate surface (23).

22. The battery device (101) according to claim 9, characterized in that The second part (32) has a mounting groove (322) in the circumferential direction, and the locking ring (4) is rotatably arranged in the mounting groove (322).

23. The battery device (101) according to claim 9, characterized in that A rotating paddle (43) is also provided on the outer side of the locking ring (4).

24. The battery device (101) according to claim 1, characterized in that The installation channels (1) are multiple, and the first channels (11) of the multiple installation channels (1) are connected to form a communication channel (112).

25. The battery device (101) according to claim 1, characterized in that The heat exchange body includes at least one heat exchange tube, and the heat exchange tube is bent on the side of the battery cell assembly.

26. The battery device (101) according to claim 1, characterized in that The heat exchange body comprises a flow guide tube (20) and a heat exchange component. The flow guide tube (20) is connected between the locking joint (3) and the heat exchange component. The heat exchange component is arranged on the side of the battery monomer assembly.

27. The battery device (101) according to claim 26, characterized in that The flow guide pipe (20) is a straight pipe or a bent pipe.

28. The battery device (101) according to claim 26, characterized in that The heat exchange element is a heat exchange plate.

29. An electrical device, characterized in that: include: The battery device (101) according to any one of claims 1 to 28.

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