Battery pack and electric device

Abstract

The application relates to the technical field of battery packs, and discloses a battery pack and an electric device. The battery pack has a first direction and a second direction intersecting with each other, and comprises a box body, a plurality of single batteries, a first flow distribution member and a flow converging member. The box body is provided with an accommodating cavity, and comprises a first bottom plate and a backflow opening formed in the first bottom plate. The plurality of single batteries are arranged in the accommodating cavity. The plurality of single batteries are arranged into battery groups along the first direction. The battery groups are arranged at intervals along the second direction. Adjacent two battery groups have a gap, and the gap is communicated with the backflow opening. The first flow distribution member is arranged on one side of the gap away from the first bottom plate. The first flow distribution member is sealingly connected with the adjacent battery groups, and is provided with a first flow channel in the first flow distribution member. The first flow channel is communicated with the gap. The flow converging member is arranged on one side of the first flow distribution member away from the single batteries. The flow converging member is provided with a converging flow channel in the flow converging member. The converging flow channel is communicated with the first flow channel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery pack and an electric device. BACKGROUND

[0002] At present, power battery is an important power device of new energy vehicle. The battery has a heating phenomenon during use. If the battery is in a high temperature state for a long time, the service life will be affected, and in severe cases, heat runaway may occur.

[0003] The prior art has developed an immersed battery pack form, the battery is arranged in the battery pack box body, and the battery is immersed and cooled by filling the cooling liquid in the battery pack to ensure that the battery stably maintains the working temperature. The existing battery pack has a liquid inlet and a liquid outlet on the outer wall of the box body, and is communicated with the flow channel. However, part of the flow channel is close to the liquid inlet and the liquid outlet, and the other part of the flow channel is far away from the liquid inlet and the liquid outlet. The flowability of the cooling liquid in the gap of each area is uneven, and the purpose of efficient liquid cooling and balanced temperature control cannot be achieved. SUMMARY

[0004] The technical problem to be solved by the present application is that part of the flow channel of the existing battery pack is close to the liquid inlet and the liquid outlet, and the other part of the flow channel is far away from the liquid inlet and the liquid outlet. The flowability of the cooling liquid in the gap of each area is uneven, and the purpose of efficient liquid cooling and balanced temperature control cannot be achieved.

[0005] In order to solve the above technical problems, the present application provides a technical scheme of a battery pack:

[0006] The battery pack has a first direction and a second direction intersecting each other, and comprises:

[0007] The box body is provided with a containing cavity; the box body comprises a first bottom plate and a backflow opening formed in the first bottom plate;

[0008] A plurality of single batteries are arranged in the containing cavity; a plurality of the single batteries are arranged into a battery group along the first direction; the battery group is spaced apart along the second direction; the gap between the adjacent two battery groups is communicated with the backflow opening;

[0009] A first flow dividing member is arranged on one side of the gap away from the first bottom plate; the first flow dividing member is sealingly connected with the adjacent battery group, and the first flow dividing member is provided with a first flow channel communicated with the gap;

[0010] A flow converging member is arranged on one side of the first flow dividing member away from the single battery; the flow converging member is provided with a converging flow channel communicated with the first flow channel.

[0011] Further, the first flow distributors are arranged in the second direction, and the first flow distributors are provided with a plurality of first holes on the side of the first flow distributors facing the gap, and the first holes are in communication with the first flow channels; and the first flow distributors are provided with a plurality of inflow ports on the side of the first flow distributors away from the gap, and the inflow ports are in communication with the first flow channels.

[0012] The flow collectors are arranged in the first direction, and the flow collectors are provided with a plurality of flow outlets in communication with the flow combining channels, and the flow outlets are in communication with the inflow ports; and the flow collectors and the first flow distributors are connected to form a grid structure.

[0013] Further, the flow collectors further include protruding portions on the side of the flow collectors facing the gap, and the protruding portions are arranged around the flow outlets; and the protruding portions are inserted into the inflow ports to connect the flow outlets and the inflow ports.

[0014] Further, the first flow distributors are in a tubular structure, and include two first walls arranged in the second direction and a flange arranged on one of the first walls in the second direction;

[0015] The first flow distributors further include first sealing members arranged between the two first walls and the side of the single batteries in the second direction, and arranged between the flange and the end surface of the single batteries away from the first bottom plate.

[0016] Further, the battery pack further includes second flow distributors arranged on the side of the gap close to the first bottom plate, and the second flow distributors are respectively sealed and connected with the battery groups adjacent in the second direction, and the first flow distributors and the second flow distributors are arranged opposite in the third direction;

[0017] The second flow distributors are provided with second flow channels, and the second flow distributors are provided with a plurality of second holes in communication with the second flow channels on the side of the second flow distributors facing the gap; and the second flow distributors are provided with a plurality of flow outlets on the side of the second flow distributors facing the first bottom plate, and the flow outlets are in communication with the return ports; and the third direction intersects with the first direction and the second direction.

[0018] Further, the battery pack further includes limiting members in a strip shape and arranged in a plurality, and the limiting members extend in the first direction or the second direction, and the limiting members are sealed and connected with the box and the single batteries.

[0019] Further, the limiting piece comprises a stop edge and a fitting part, the fitting part is protrudingly arranged on the side of the stop edge facing the single battery, the stop edge is in stop cooperation with the box and the single battery along the third direction, and the fitting part is further provided with a third sealing piece between the box and the single battery.

[0020] Further, the box comprises a first side beam extending along the first direction, the first side beam is provided with a transition port facing the accommodating cavity, the current collecting piece is provided with a current collecting inlet communicating with the converging flow channel at one end of the second direction, and the current collecting inlet is in communication with the transition port.

[0021] Further, the box further comprises a second bottom plate, the second bottom plate is arranged on the side of the first bottom plate away from the single battery, and the first bottom plate and the second bottom plate are arranged at intervals along the third direction;

[0022] The box further comprises a second side beam extending along the second direction, and the first bottom plate, the second bottom plate, the first side beam and the second side beam surround a box flow channel, and the backflow port is in communication with the box flow channel.

[0023] Further, the first side beam comprises a liquid inlet port, a liquid inlet flow channel, a liquid outlet port and a liquid outlet flow channel, the liquid inlet flow channel communicates the liquid inlet port and the transition port, and the liquid outlet flow channel communicates the liquid outlet port and the box flow channel.

[0024] To solve the above technical problems, the application further provides a technical scheme of an electric device:

[0025] The electric device comprises a battery pack; the battery pack has a first direction, a second direction and a third direction intersecting with each other, and comprises:

[0026] The box is provided with an accommodating cavity; the box comprises a first bottom plate and a backflow port opened in the first bottom plate;

[0027] A plurality of single batteries are arranged in the accommodating cavity; the plurality of single batteries are arranged into a battery group along the first direction; the battery group is arranged at intervals along the second direction; and there is a gap between two adjacent battery groups, and the gap is in communication with the backflow port;

[0028] A first flow distribution piece is arranged on the side of the gap away from the first bottom plate; the first flow distribution piece is in sealed connection with the adjacent battery group, a first flow channel is arranged in the first flow distribution piece, and the first flow channel is in communication with the gap;

[0029] A current collecting piece is arranged on the side of the first flow distribution piece away from the single battery; a converging flow channel is arranged in the current collecting piece, and the converging flow channel is in communication with the first flow channel.

[0030] Further, the first flow distributors are arranged in plurality along the second direction, the first flow distributors are provided with a plurality of first holes on the side facing the gap, and the first holes are in communication with the first flow channels; the first flow distributors are provided with a plurality of inflow openings on the side away from the gap, and the inflow openings are in communication with the first flow channels.

[0031] The flow collectors are arranged in plurality along the first direction, the flow collectors are provided with a plurality of flow outlets in communication with the converging flow channels, and the flow outlets are in communication with the inflow openings; the flow collectors and the first flow distributors are connected to form a grid structure.

[0032] Further, the flow collectors further comprise protruding portions on the side facing the gap, and the protruding portions are arranged around the flow outlets; the protruding portions are inserted into the inflow openings to connect the flow outlets and the inflow openings.

[0033] Further, the first flow distributors are in tubular structure, comprising two first walls arranged in plurality along the second direction, and a flange arranged on one of the first walls in the second direction;

[0034] The first flow distributors further comprise first sealing members arranged between the first walls and the side of the single battery in the second direction, and arranged between the flange and the end surface of the single battery away from the first bottom plate.

[0035] Further, the battery pack further comprises second flow distributors arranged on the side of the gap close to the first bottom plate, the second flow distributors are respectively connected to the adjacent battery groups in the second direction, and the first flow distributors and the second flow distributors are arranged opposite to each other along the third direction.

[0036] The second flow distributors are provided with second flow channels, the second flow distributors are provided with a plurality of second holes on the side facing the gap, and the second holes are in communication with the second flow channels; the second flow distributors are provided with a plurality of flow outlets on the side facing the first bottom plate, and the flow outlets are in communication with the return flow openings.

[0037] Further, the battery pack further comprises limiting members in long strip shape and arranged in plurality, the limiting members extend along the first direction or the second direction, and the limiting members are connected to the box and the single battery.

[0038] Further, the limiting piece comprises a stop edge portion and an embedding portion, the embedding portion is protrudingly arranged on the side of the stop edge portion facing the single battery, the stop edge portion is in stop cooperation with the box and the single battery along the third direction, and the embedding portion is further provided with a third sealing piece between the box and the single battery.

[0039] Further, the box comprises a first edge beam extending along the first direction, the first edge beam is provided with a transition interface facing the accommodating cavity, the confluence piece is provided with a confluence inlet communicating with the confluence channel at one end of the second direction, and the confluence inlet is in communication with the transition interface.

[0040] Further, the box further comprises a second bottom plate, the second bottom plate is arranged on the side of the first bottom plate away from the single battery, and the first bottom plate and the second bottom plate are arranged at intervals along the third direction.

[0041] The box further comprises a second edge beam extending along the second direction, and the first bottom plate, the second bottom plate, the first edge beam and the second edge beam surround a box channel, and the backflow port is in communication with the box channel.

[0042] Further, the first edge beam comprises a liquid inlet interface, a liquid inlet channel, a liquid outlet interface and a liquid outlet channel, the liquid inlet channel is in communication with the liquid inlet interface and the transition interface, and the liquid outlet channel is in communication with the liquid outlet interface and the box channel.

[0043] Compared with the prior art, the battery pack and the electric device have the following beneficial effects: the battery pack adopts the design form of a box, a plurality of single batteries, a first shunt piece and a confluence piece, the box comprises a first bottom plate and a backflow port formed in the first bottom plate, the plurality of single batteries are arranged into battery groups along a first direction, there is a gap between adjacent two battery groups, and the gap is in communication with the backflow port. It should be noted that the plurality of single batteries of the same battery group are sequentially and sealingly connected along the first direction, so that a continuous and complete gap along the first direction is formed between adjacent two battery groups, thereby ensuring the flow of the cooling liquid in the gap along the third direction.

[0044] The first shunt piece is arranged on the side of the gap away from the first bottom plate, the first shunt piece is sealingly connected with the two battery groups adjacent along the second direction, the first shunt piece is provided with a first channel, and a liquid cooling channel is formed from the first channel of the first shunt piece, the gap to the backflow port in sequence, so that the cooling liquid can exchange heat with the single batteries on both sides of the gap, thereby ensuring the battery cooling effect.

[0045] Moreover, the busbar is located on the side of the first shunt that is away from the individual battery. The busbar has a merging channel, which is connected to the first channel of the first shunt. The coolant first flows in the merging channel of the busbar, and then distributes the coolant to the first channels of each first shunt, ensuring that the coolant can be evenly distributed to each gap for heat exchange.

[0046] During operation, the coolant first flows in the confluence channel of the manifold, then enters the first channel of the first distributor and flows in the first direction. It then enters the gaps through the first channel and flows in the third direction, finally exiting through the return port onto the outside of the first base plate, allowing the cooled coolant to circulate after heat exchange. Utilizing the arrangement of the manifold, the first distributor, and the return port on the first base plate, the coolant undergoes two flow distributions in the confluence channel and the first channel before entering the gaps to exchange heat with individual cells. This ensures more uniform flow of the coolant in all areas of the tank, achieving efficient liquid cooling and balanced temperature control. Attached Figure Description

[0047] Figure 1 This is a three-dimensional schematic diagram of the battery pack in an embodiment of the present invention;

[0048] Figure 2 This is an exploded schematic diagram of the battery pack in an embodiment of the present invention;

[0049] Figure 3 This is a three-dimensional schematic diagram of the battery pack housing in an embodiment of the present invention;

[0050] Figure 4 This is a schematic diagram showing the connection of the first shunt component, the second shunt component, the bus component, and the limiting component of the battery pack in an embodiment of the present invention.

[0051] Figure 5 This is a partial cross-sectional view of the battery pack in the second direction in an embodiment of the present invention;

[0052] Figure 6 This is a three-dimensional schematic diagram of the first diverter in an embodiment of the present invention;

[0053] Figure 7 This is a three-dimensional schematic diagram of the busbar in an embodiment of the present invention;

[0054] Figure 8 This is a three-dimensional schematic diagram of the second diverter in an embodiment of the present invention;

[0055] Figure 9 This is a three-dimensional schematic diagram of the limiting member in an embodiment of the present invention;

[0056] Figure 10 This is a cross-sectional view of the battery pack in the first direction in an embodiment of the present invention;

[0057] Figure 11 This is a cross-sectional view of the battery pack at the second side beam in an embodiment of the present invention;

[0058] In the diagram: 1-box body, 10-accommodating cavity, 11-first bottom plate, 12-return port, 13-first side beam, 14-second side beam, 15-liquid inlet, 150-liquid inlet channel, 16-liquid outlet, 160-liquid outlet channel, 17-connector, 18-second bottom plate, 19-box body channel;

[0059] 2-Single cell, 20-Gap, 21-Battery pack, 22-First side, 23-Second side, 3-First shunt, 30-First flow channel, 31-First hole, 32-Inlet, 33-First wall, 34-Flange, 35-First seal;

[0060] 4-Second diverter, 40-Second flow channel, 41-Second hole, 42-Diverter outlet, 43-Second wall, 44-Second seal, 5-Merging component, 50-Merging flow channel, 51-Merging outlet, 52-Protrusion, 53-Merging inlet, 6-Limiting component, 60-Baffle, 61-Matching part, 62-Third seal, 7-Stop component, X-First direction, Y-Second direction, Z-Third direction. Detailed Implementation

[0061] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0062] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" used to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0064] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] like Figures 1 to 11 As shown, a battery pack according to an embodiment of the present invention has a first direction X, a second direction Y and a third direction Z intersecting in pairs, including: a housing 1, a plurality of individual batteries 2, a first shunt 3 and a busbar 5. The housing 1 is provided with a receiving cavity 10. The housing 1 includes a first bottom plate 11 and a return port 12 opened on the first bottom plate 11. The plurality of individual batteries 2 are disposed in the receiving cavity 10. The plurality of individual batteries 2 are arranged along the first direction X to form a battery pack 21. There are multiple battery packs 21. The multiple battery packs 21 are arranged at intervals along the second direction Y. There is a gap 20 between two adjacent battery packs 21, and the gap 20 is connected to the return port 12.

[0066] The first diverter 3 is disposed on the side of the gap 20 away from the first base plate 11; the first diverter 3 is sealed to the battery pack 21 adjacent along the second direction Y, and the first diverter 3 is provided with a first flow channel 30, which is connected to the gap 20.

[0067] The busbar 5 is disposed in the receiving cavity 10, and the busbar 5 is located on the side of the first shunt 3 away from the single cell 2; the busbar 5 is provided with a merging channel 50; the merging channel 50 is connected to the first channel 30. It should be noted that the first direction X and the second direction Y intersect perpendicularly in the plane of the first base plate 11, and the third direction Z is perpendicular to the plane of the first base plate 11. Furthermore, the angle between the first direction X and the second direction Y, and the angle between the third direction Z and the plane of the first base plate 11, are all within the range of 80° to 90° and fall within the protection range defined by "perpendicular" in this embodiment.

[0068] The battery pack adopts a design consisting of a housing 1, multiple individual cells 2, a first shunt 3, and a busbar 5. The housing 1 includes a first base plate 11 and a return port 12 formed on the first base plate 11. Multiple individual cells 2 are arranged along a first direction X to form a battery pack 21. There is a gap 20 between two adjacent battery packs 21, and the gap 20 is connected to the return port 12. It should be noted that multiple individual cells 2 of the same battery pack 21 are sequentially and sealed together along the first direction X, so that a continuous and complete gap 20 along the first direction X is formed between two adjacent battery packs 21, thereby ensuring that the coolant flows along the third direction Z in the gap 20.

[0069] The first shunt 3 is located on the side of the gap 20 away from the first base plate 11. It is sealed to two adjacent battery packs 21 along the second direction Y. The first shunt 3 has a first flow channel 30. A liquid cooling flow channel is formed from the first flow channel 30 of the first shunt 3, the gap 20 to the return port 12. The coolant can play a heat exchange role on the individual battery 2 on both sides of the gap 20, ensuring the battery cooling effect.

[0070] Moreover, the busbar 5 is located on the side of the first branch member 3 away from the single cell 2. The busbar 5 is provided with a converging channel 50. The converging channel 50 of the busbar 5 is connected to the first channel 30 of the first branch member 3. The coolant first flows in the converging channel 50 of the busbar 5, and the coolant is distributed to the first channel 30 of each first branch member 3 through the converging channel 50, ensuring that the coolant can be evenly dispersed to each gap 20 for heat exchange.

[0071] During operation, the coolant first flows in the confluence channel 50 of the manifold 5, then enters the first channel 30 of the first branching component 3 and flows in the first direction X. It then enters the gap 20 through the first channel 30 and flows in the third direction Z. Finally, it flows out through the return port 12 to the outside of the first base plate 11, allowing the cooled coolant to circulate after heat exchange. Utilizing the arrangement of the manifold 5, the first branching component 3, and the return port 12 of the first base plate 11, the coolant undergoes two flow distributions in the confluence channel 50 and the first channel 30. After flow distribution, it enters each gap 20 to exchange heat with the individual battery cells 2, ensuring more uniform flow of the coolant in each area of ​​the gap 20 within the housing 1, thereby achieving efficient liquid cooling and balanced temperature control.

[0072] In this embodiment, multiple first diverter members 3 are spaced apart along the second direction Y. Multiple first holes 31 communicating with the first flow channel 30 are opened on the side of the first diverter member 3 facing the gap 20, and the multiple first holes 31 are connected to the gap 20. Multiple inlets 32 communicating with the first flow channel 30 are opened on the side of the first diverter member 3 away from the gap 20. Multiple converging members 5 are spaced apart along the first direction X. Multiple converging members 5 have multiple converging outlets 51 communicating with the converging flow channel 50, and the converging outlets 51 are connected to the inlets 32. The multiple converging members 5 and the multiple first diverter members 3 are connected to form a grid structure. The multiple converging members 5 can form multiple input points for the first diverter members 3 at different positions in the first direction X, ensuring the uniformity of the heat exchange fluid flow rate within the entire first flow channel 30. The multiple converging members 5 and the multiple first diverter members 3 form a grid structure, thereby ensuring a balanced flow distribution in the gaps 20 of each area within the entire housing 1.

[0073] As a further preferred embodiment, the busbar 5 also includes a protrusion 52, such as... Figure 5As shown, the protrusion 52 is located on the side of the manifold 5 facing the gap 20, and the protrusion 52 is arranged around the manifold outlet 51; the protrusion 52 is inserted into the inlet 32 ​​to connect the manifold outlet 51 and the inlet 32. By providing the protrusion 52 around the manifold outlet 51, the protrusion 52 and the inlet 32 ​​of the first diverter 3 are inserted and cooperate to play a positioning role, which can improve the assembly accuracy of the manifold 5 and the first diverter 3, and ensure that a reliable communication relationship is formed between the merging channel 50 and the first channel 30.

[0074] like Figure 6 As shown, the first diverter 3 is a tubular structure, including two first walls 33 spaced apart in the second direction Y, and a flange 34 protruding from one of the first walls 33 in the second direction Y. The first diverter 3 also includes a first seal 35, which is located between the two first walls 33 and the side of the single cell 2 facing the second direction Y, and between the flange 34 and the end face of the single cell 2 away from the first base plate 11. The hollow portion of the first diverter 3 forms a first flow channel 30. The flange 34 overlaps the upper side of the end of the single cell 2 away from the first base plate 11 and serves to position the first diverter 3 in the third direction Z. By having the three first seals 35 contact and cooperate with the side of the single cell 2 facing the second direction Y and the end face of the single cell 2 away from the first base plate 11, the sealing effect on the upper part of the gap 20 is ensured.

[0075] In this embodiment, the battery pack further includes a second diverter 4, which is disposed on the side of the gap 20 near the first base plate 11. The second diverter 4 is sealed to the battery pack 21 adjacent along the second direction Y, and the first diverter 3 and the second diverter 4 are disposed opposite each other along the third direction Z. The second diverter 4 is provided with a second flow channel 40, and the second diverter 4 is also provided with a plurality of second holes 41 communicating with the second flow channel 40 facing the gap 20. The second diverter 4 is provided with a plurality of diversion outlets 42 facing the first base plate 11, and the diversion outlets 42 are connected to the return port 12.

[0076] In use, the heat exchange fluid flows in the gap 20 along the third direction Z, enters the second flow channel 40 of the second diverter 4 through the second hole 41, and then flows out of the outside of the first bottom plate 11 through the diversion outlet 42 and the return port 12. Furthermore, the second diverter 4 is a tubular structure, including two second walls 43 and a second seal 44. The two second walls 43 are spaced apart in the first direction X; the second seals 44 are respectively disposed on the two second walls 43 and seal against the side of the individual battery cell 2. The second diverter 4 can limit the relative positions of multiple battery packs 21 in the second direction Y and ensure a sealing effect on the lower part of the gap 20.

[0077] As a further preferred embodiment, the battery pack also includes a limiting member 6. The limiting member 6 is elongated and multiple in number, extending along either the first direction X or the second direction Y. The limiting member 6 seals and connects the housing 1 and the individual battery 2, reliably limiting the relative position of the individual battery 2 and the housing 1, ensuring no coolant leakage occurs between them. Specifically, the limiting member 6 includes a retaining edge 60 and a fitting part 61. The fitting part 61 protrudes from the retaining edge 60 on the side facing the individual battery 2, and the retaining edge 60 engages with the housing 1 and the individual battery 2 along the third direction Z. A third sealing member 62 is also provided between the fitting part 61 and the housing 1 and the individual battery 2. The limiting member 6 provides positioning and sealing with the housing 1 and the individual battery 2, ensuring the stable and reliable position of the individual battery 2 within the housing 1.

[0078] In this embodiment, the housing 1 includes a first side beam 13 extending along a first direction X. The first side beam 13 is provided with a transition interface 17 facing the receiving cavity 10. The manifold 5 is provided with a manifold inlet 53 at one end in a second direction Y, which connects to the confluence channel 50, and the manifold inlet 53 is connected to the transition interface 17. The first side beam 13 not only provides a mounting point for the manifold 5, but also establishes a complete liquid inlet path between the first side beam 13 and the manifold 5.

[0079] The housing 1 also includes a second base plate 18, such as Figure 10 , Figure 11 As shown, the second base plate 18 is located on the side of the first base plate 11 away from the single cell 2. The first base plate 11 and the second base plate 18 are arranged at intervals along the third direction Z. The housing 1 also includes a second side beam 14 extending along the second direction Y. The first base plate 11, the second base plate 18, the first side beam 13, and the second side beam 14 form a housing flow channel 19. The return port 12 is connected to the housing flow channel 19. Furthermore, the two first side beams 13, the two second side beams 14, and the first base plate 11 form a receiving cavity 10. The first base plate 11 and the second base plate 18 form a hollow flow channel base plate structure, which allows the heat exchange liquid to be discharged from the bottom of the housing 1 to achieve the purpose of return circulation.

[0080] In addition, such as Figure 11As shown, the first side beam 13 includes an inlet port 15, an inlet channel 150, an outlet port 16, and an outlet channel 160. The inlet channel 150 connects the inlet port 15 and the adapter port 17, and the outlet channel 160 connects the outlet port 16 and the housing channel 19. During inlet operation, the heat exchange fluid flows from the inlet port 15 into the inlet channel 150, then passes through the adapter port 17 and the confluence inlet 53 into the confluence channel 50. Similarly, during outlet operation, the heat exchange fluid enters the outlet channel 160 from the housing channel 19 at the bottom of the housing 1, and then exits the housing 1 through the outlet port 16. Furthermore, the inlet port 15 and the outlet port 16 can be connected to a water pump and a heat dissipation structure, thereby effectively controlling the flow rate and return temperature of the coolant.

[0081] An embodiment of the present invention provides an electrical device, which includes a battery pack. The battery pack is the same as the specific embodiments of the battery pack in the above-described embodiments of the invention, and will not be described again here.

[0082] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A battery pack having intersecting first directions (X) and second directions (Y), characterized in that, include: The box body (1) is provided with a receiving cavity (10); the box body (1) includes a first bottom plate (11) and a return port (12) opened on the first bottom plate (11). Multiple individual battery cells (2) are disposed in the receiving cavity (10); the multiple individual battery cells (2) are arranged into a battery pack (21) along a first direction (X); multiple battery packs (21) are arranged at intervals along a second direction (Y); there is a gap (20) between two adjacent battery packs (21), and the gap (20) is connected to the return port (12); The first diverter (3) is disposed on the side of the gap (20) away from the first base plate (11); the first diverter (3) is sealed to the adjacent battery pack (21), and the first diverter (3) is provided with a first flow channel (30), which communicates with the gap (20); A busbar (5) is disposed on the side of the first shunt (3) away from the single cell (2); the busbar (5) is provided with a merging channel (50), which is connected to the first channel (30); The first diverter (3) is provided with a plurality of holes spaced apart along the second direction (Y). The first diverter (3) has a plurality of first holes (31) communicating with the first flow channel (30) on the side facing the gap (20), and the plurality of first holes (31) are communicating with the gap (20). The first diverter (3) is a tubular structure, including two first walls (33) spaced apart in the second direction (Y), and a flange (34) protruding in the second direction (Y) and disposed on one of the first walls (33); the flange (34) overlaps the upper side of the end of the single cell (2) away from the first base plate (11).

2. The battery pack according to claim 1, characterized in that, The first diverter (3) has multiple inlets (32) on the side away from the gap (20) that communicate with the first flow channel (30). The manifold (5) is provided with multiple manifolds at intervals along the first direction (X). The manifold (5) has multiple manifold outlets (51) that connect to the confluence channel (50), and the manifold outlets (51) are connected to the inlet (32). The multiple manifolds (5) are connected to the multiple first diverters (3) to form a grid structure.

3. The battery pack according to claim 2, characterized in that, The manifold (5) further includes a protrusion (52) located on the side of the manifold (5) facing the gap (20) and the protrusion (52) is arranged around the manifold outlet (51); the protrusion (52) is inserted into the inlet (32) to connect the manifold outlet (51) and the inlet (32).

4. The battery pack according to claim 1, characterized in that, The first shunt member (3) further includes a first seal (35), which is disposed between the two first walls (33) and the side of the single cell (2) facing the second direction (Y), and between the flange (34) and the end face of the single cell (2) away from the first base plate (11).

5. The battery pack according to claim 1, characterized in that, The battery pack also includes a second shunt (4), which is disposed on the side of the gap (20) near the first base plate (11). The second shunt (4) is sealed to the battery pack (21) adjacent to it along the second direction (Y), and the first shunt (3) and the second shunt (4) are disposed opposite to each other along the third direction (Z). The second diverter (4) is provided with a second flow channel (40), and the second diverter (4) is also provided with a plurality of second holes (41) communicating with the second flow channel (40) in the gap (20); the second diverter (4) is provided with a plurality of diverting outlets (42) in the first base plate (11), and the diverting outlets (42) are connected to the return port (12); the third direction (Z) intersects the first direction (X) and the second direction (Y) in pairs.

6. The battery pack according to claim 5, characterized in that, The battery pack also includes a limiting member (6), which is elongated and has multiple members. The limiting member (6) extends along the first direction (X) or the second direction (Y) and the limiting member (6) seals and connects the housing (1) and the individual battery (2).

7. The battery pack according to claim 6, characterized in that, The limiting member (6) includes a retaining edge (60) and a fitting part (61). The fitting part (61) protrudes from the retaining edge (61) on the side facing the single battery (2), and the retaining edge (60) is engaged with the housing (1) and the single battery (2) along the third direction (Z). A third sealing member (62) is also provided between the fitting part (61) and the housing (1) and the single battery (2).

8. The battery pack according to claim 5, characterized in that, The housing (1) includes a first side beam (13) extending along the first direction (X), the first side beam (13) having a transition interface (17) facing the receiving cavity (10), the manifold (5) having a confluence inlet (53) at one end in the second direction (Y) communicating with the confluence channel (50), and the confluence inlet (53) communicating with the transition interface (17).

9. The battery pack according to claim 8, characterized in that, The housing (1) also includes a second bottom plate (18), which is disposed on the side of the first bottom plate (11) away from the single battery (2). The first bottom plate (11) and the second bottom plate (18) are arranged at intervals along the third direction (Z). The box body (1) also includes a second side beam (14) extending along the second direction (Y), the first bottom plate (11), the second bottom plate (18), the first side beam (13) and the second side beam (14) form a box body flow channel (19), and the return port (12) is connected to the box body flow channel (19).

10. The battery pack according to claim 9, characterized in that, The first side beam (13) includes a liquid inlet (15), a liquid inlet channel (150), a liquid outlet (16) and a liquid outlet channel (160). The liquid inlet channel (150) connects the liquid inlet (15) and the adapter (17), and the liquid outlet channel (160) connects the liquid outlet (16) and the box channel (19).

11. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 10.

Images