Battery pack and electric device

Abstract

The utility model relates to battery technical field discloses battery pack and electrical equipment, cooling device includes: transfusion subassembly, including liquid inlet pipe and liquid outlet pipe, a plurality of cooling components, cooling component includes heat exchange part and connecting seat, and the inside of heat exchange part has the cooling channel for the circulation of cooling liquid, and connecting seat has liquid inlet part and liquid outlet part, and at least one connecting seat still has input part, and at least another connecting seat still has output part, and liquid inlet part communicates with the liquid inlet of cooling channel, and liquid outlet part communicates with the liquid outlet of cooling channel, and liquid inlet part communicates with liquid inlet pipe through input part, and liquid outlet part communicates with liquid outlet pipe through output part, and electric core, the utility model will liquid inlet part, liquid outlet part, input part and output part be integrated to corresponding connecting seat respectively, and through single component can realize multiple connection functions simultaneously, and heat exchange part can be connected with adjacent heat exchange part or corresponding pipeline through a connecting seat, can reduce the quantity of connecting structure, and the structure is simplified also reduced the risk of liquid leakage.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to battery packs and electrical equipment. Background Technology

[0002] Cooling devices are a crucial part of power batteries, ensuring battery performance and safety. Since electric batteries generate a significant amount of heat during charging and discharging, excessively high temperatures can not only reduce battery efficiency but also shorten their lifespan and even lead to safety issues. Therefore, to effectively control the temperature of the battery cells, liquid cooling plates are typically installed inside the battery pack, using circulating coolant to cool the cells.

[0003] Currently, in order to improve the cooling effect of the cooling device, existing battery packs usually adopt the arrangement of placing liquid cooling plates between two adjacent rows of cells. Multiple vertically placed liquid cooling plates are used to increase the contact area between the cells and the liquid cooling plates. In this liquid cooling plate arrangement, due to the large number of liquid cooling plates and the need to supply coolant to each liquid cooling plate, the structure of the liquid inlet and outlet of the liquid cooling plate is complex and there are many connecting parts, which makes assembly difficult. Utility Model Content

[0004] In view of this, the present invention provides a battery pack and electrical equipment to solve the problem that the existing spaced liquid cooling plate connecting components are difficult to assemble.

[0005] In a first aspect, this utility model provides a battery pack having intersecting first and second directions, comprising: a housing having a receiving space; a cooling device including a liquid inlet assembly and a cooling assembly, both disposed within the receiving space; wherein the liquid inlet assembly includes an inlet pipe and an outlet pipe; multiple cooling assemblies are spaced apart along the first direction, each cooling assembly including a heat exchange section and a connecting seat, the heat exchange section extending along the second direction and having a cooling channel for coolant flow inside, the connecting seat being disposed on one side of the heat exchange section along the second direction and having an inlet section and an outlet section. In the same cooling assembly, the liquid inlet and liquid outlet are respectively connected to the two ends of the cooling channel; multiple liquid inlets are interconnected and arranged along a first direction, and multiple liquid outlets are interconnected and arranged along the first direction; at least two connecting seats have an input part and an output part respectively, one end of the input part is connected to the liquid inlet part provided in the same connecting seat, and the other end is connected to the liquid inlet pipe; one end of the output part is connected to the liquid outlet part provided in the same connecting seat, and the other end is connected to the liquid outlet pipe; multiple battery cells are provided in the receiving space, and some battery cells are located between the heat exchange parts of adjacent cooling assemblies and achieve heat exchange with them.

[0006] Beneficial effects: The integrated design of the connector integrates the liquid inlet, liquid outlet, input, and output sections into the corresponding connectors. Multiple connection functions can be achieved simultaneously through a single component. Each heat exchange section can be connected to adjacent heat exchange sections or corresponding pipelines through a single connector, which can effectively reduce the number of connection structures, simplify the structure, and reduce the risk of leakage. It also effectively solves the problem of difficult assembly of existing spaced liquid cooling plate connection components.

[0007] In one optional embodiment, the cooling device further includes a connecting assembly, wherein at least two adjacent liquid inlets of a plurality of liquid inlets are connected by the connecting assembly, and both ends of the connecting assembly are respectively inserted into the corresponding liquid inlets; and / or, at least two adjacent liquid outlets of a plurality of liquid outlets are connected by the connecting assembly, and both ends of the connecting assembly are respectively inserted into the corresponding liquid outlets.

[0008] Beneficial effects: In this plug-in type, the ends of the connecting components are located inside the liquid inlet and liquid outlet. Compared with the tube body being sleeved outside the connection port, the inner and outer diameters of the tube body in this embodiment are smaller. This type of tube body can meet the connection strength requirements with a shorter length, thus playing a reliable connection role between cooling components with small spacing.

[0009] In one optional embodiment, a plurality of connectors are arranged along a first direction, and the liquid inlets on adjacent connectors are connected to each other through a connecting component, and the liquid outlets on adjacent connectors are connected to each other through a connecting component; one of the connectors located at one edge along the first direction forms an input connector, and an input part is disposed on the input connector; one of the connectors located at the other edge along the first direction forms an output connector, and an output part is disposed on the output connector.

[0010] Beneficial effects: This type of connector reduces the number of connecting pipes used. The liquid inlet and outlet of the entire heat exchange section can be met by a single liquid inlet pipe and a single liquid outlet pipe, greatly reducing the number of piping components used.

[0011] In one optional embodiment, the inlet and / or outlet have a connecting pipe for connecting a connecting assembly; the connecting assembly includes a tube body, a limiting member, and a nozzle, wherein a cavity is provided in the tube body in a first direction, the limiting member is provided on the outer wall of the tube body, and the nozzle is provided at the end of the tube body in the first direction; the nozzle is inserted into the connecting pipe, and the end of the connecting pipe abuts against the limiting member.

[0012] Beneficial effects: The relative position of the connecting tube and the tube body can be positioned by the limiting component, without the need for additional top components. The structure is simple and reliable, and it can control the maximum insertion amount. In addition, the limiting component cooperates with the end of the connecting tube, and the end of the connecting tube has high structural strength and is not easily damaged. This can prevent the connecting component from directly acting on the body of the liquid inlet or liquid outlet and damaging it.

[0013] In one alternative embodiment, the connecting assembly further includes a seal disposed on the tube body and located between the nozzle and the limiting member, and the connecting tube abuts against the nozzle through the seal.

[0014] Beneficial effects: The seal can effectively improve the reliability of the connection between the pipe and the pipe body and prevent coolant leakage.

[0015] In one alternative embodiment, on the input seat, the input portion is located on the side of the liquid inlet portion away from the heat exchange portion; on the output seat, the output portion is located on the side of the liquid outlet portion away from the heat exchange portion.

[0016] Beneficial effects: This type of input and output configuration reduces the height of the connector and allows the input and output sections to be further away from the battery cell, making it easier for them to connect to the corresponding pipelines.

[0017] In one alternative embodiment, along the second direction, both the inlet pipe and the outlet pipe are located on the side of the connector away from the heat exchange section.

[0018] Beneficial effects: This type of infusion assembly can avoid heat exchange between the internal coolant and the battery cell, thus preventing the occurrence of localized cooling effects that could lead to poor temperature uniformity within the battery pack.

[0019] In one alternative embodiment, the heat exchange sections of adjacent cooling components are arranged in parallel, and the battery pack also has a third direction intersecting the first direction and the second direction, with the heat exchange section having a polygonal shape when projected along the third direction.

[0020] Beneficial effects: After the cooling device is assembled with the battery cell, the heat exchange section corresponding to the adjacent cooling component can directly fix the position of the battery cell without the need for additional positioning components, which can effectively reduce the number of components required for battery cell positioning.

[0021] In one optional embodiment, each of the multiple cells has two opposing first sidewalls along a first direction and two opposing second sidewalls along a second direction. The area of ​​the first sidewalls is larger than that of the second sidewalls, and the two first sidewalls are respectively disposed opposite to the heat exchange sections of two adjacent cooling assemblies.

[0022] Beneficial effects: This arrangement of battery cells allows their larger wall surface to come into contact with the heat exchange section of the cooling device, improving heat exchange efficiency.

[0023] Secondly, this utility model also provides an electrical device, which includes the battery pack as described above. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional schematic diagram from a first perspective of a cooling device for a battery pack according to an embodiment of the present invention.

[0026] Figure 2 for Figure 1 A three-dimensional schematic diagram of the cooling device from a second perspective;

[0027] Figure 3 for Figure 1 A top view of the cooling components and connecting components of the cooling device shown in the diagram during assembly;

[0028] Figure 4 for Figure 1 A three-dimensional schematic diagram of some cooling components of the cooling device shown;

[0029] Figure 5 for Figure 3 The diagram shows a three-dimensional schematic of the connecting components.

[0030] Figure 6 for Figure 5 The diagram shown is a 3D view of the connecting assembly cut open without the seals shown.

[0031] Figure 7 for Figure 1 A three-dimensional schematic diagram of the cooling components of the cooling device shown;

[0032] Figure 8 for Figure 1 An exploded view showing a partial cut-out of the cooling component;

[0033] Figure 9 for Figure 7 The diagram shows a cooling channel arrangement when the cooling assembly has one cooling channel.

[0034] Figure 10 for Figure 7 The diagram shown illustrates the cooling channel arrangement when the cooling assembly has multiple cooling channels.

[0035] Figure 11 for Figure 3 The diagram shows a cross-sectional view of the input and output ports of a cooling assembly with multiple cooling channels.

[0036] Figure 12 for Figure 1 An exploded view of part of the heat exchange section of the cooling assembly in conjunction with the battery cell;

[0037] Figure 13 for Figure 1 The diagram shown is a three-dimensional representation of the cooling assembly and battery cell assembly.

[0038] Figure 14 for Figure 1 The image shows a three-dimensional schematic diagram of the battery pack after assembly.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Cooling device; 2. Infusion assembly; 201. Inlet pipe; 202. Outlet pipe;

[0041] 3. Cooling assembly; 300. Heat exchange section; 301. Cooling channel; 3011. First cooling channel; 3012. Second cooling channel; 3015. Heat exchange section; 3016. Connecting section; 302. Weight reduction cavity; 303. Reinforcing rib; 304. Connecting part;

[0042] 400. Connecting seat; 401. Liquid inlet; 402. Liquid outlet; 403. Connecting pipe; 404. Input section; 405. Output section; 410. Input seat; 420. Output seat;

[0043] 500. Connecting assembly; 501. Pipe body; 5011. Annular groove; 502. Limiting element; 503. Sealing element; 504. Nozzle;

[0044] 6. Battery cell; 601. First sidewall; 602. Second sidewall; 7. Housing; 701. Accommodation space; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0046] The following is combined with Figures 1 to 14 The following describes embodiments of the present invention.

[0047] According to an embodiment of the present invention, a battery pack is provided, having intersecting first direction X and second direction Y, including: a housing 7, a cooling device 1, and battery cells 6. The housing 7 has a receiving space 701; the cooling device 1 includes a liquid inlet assembly 2 and a cooling assembly 3, both of which are disposed in the receiving space 701; wherein the liquid inlet assembly 2 includes an inlet pipe 201 and an outlet pipe 202; multiple cooling assemblies 3 are arranged at intervals along the first direction X, each cooling assembly 3 including a heat exchange section 300 and a connecting seat 400, the heat exchange section 300 extending along the second direction Y and having a cooling channel 301 for coolant flow inside, and the connecting seat 400 being disposed on one side of the heat exchange section 300 along the second direction Y and having an inlet section 401 and an outlet section. In the same cooling assembly 3, the liquid inlet 401 and the liquid outlet 402 are respectively connected to the two ends of the cooling channel 301; multiple liquid inlets 401 are interconnected and arranged along the first direction X, and multiple liquid outlets 402 are interconnected and arranged along the first direction X; at least two connecting seats 400 have an input part 404 and an output part 405 respectively, one end of the input part 404 is connected to the liquid inlet 401 provided in the same connecting seat 400, and the other end is connected to the liquid inlet pipe 201; one end of the output part 405 is connected to the liquid outlet 402 provided in the same connecting seat 400, and the other end is connected to the liquid outlet pipe 202; multiple battery cells 6 are provided in the receiving space 701, and there are battery cells 6 located between adjacent heat exchange parts 300 of the cooling assembly 3 and achieve heat exchange with them.

[0048] The cooling device 1 of this embodiment adopts an integrated design of the connector 400, which integrates the liquid inlet 401, liquid outlet 402, input 404 and output 405 to the corresponding connector 400. Multiple connection functions can be realized simultaneously through a single component. Each heat exchanger 300 can be connected to an adjacent heat exchanger 300 or a corresponding pipeline through a connector 400, which can effectively reduce the number of connection structures, simplify the structure and reduce the risk of leakage. It effectively solves the problem that the existing spaced liquid cooling plate connection components are difficult to assemble.

[0049] Specifically, it should be noted that the inlet pipe 201 and the outlet pipe 202 refer to the pipes used to connect the cooling assembly 3 to the coolant source; the heat exchange section 300 refers to the part of the cooling assembly 3 used to contact the battery cell 6 and exchange heat; the inlet section 401 refers to the part of the cooling assembly 3 used to guide the coolant flowing in through the inlet pipe 201 into the cooling channel 301; and the outlet section 402 refers to the part of the cooling assembly 3 used to guide the coolant in the cooling channel 301 into the outlet pipe 202.

[0050] The number of inlet pipes 201 and outlet pipes 202 is not limited. Multiple cooling components 3 can be connected to the coolant source through the same pair of inlet pipes 201 and outlet pipes 202, or multiple cooling components 3 can be connected to the coolant source through their respective pairs of inlet pipes 201 and outlet pipes 202.

[0051] In one possible implementation, the cooling device 1 further includes a connecting component 500, wherein at least two adjacent liquid inlets 401 are connected by the connecting component 500, and both ends of the connecting component 500 are respectively inserted into the corresponding liquid inlets 401; and / or, at least two adjacent liquid outlets 402 are connected by the connecting component 500, and both ends of the connecting component 500 are respectively inserted into the corresponding liquid outlets 402. In this type of insertion, the end of the connecting component 500 is located inside the connection port. Compared to the tube body 501 being sleeved outside the connection port, the inner and outer diameters of the tube body 501 in this embodiment are smaller. This type of tube body 501 can meet the connection strength requirements with a shorter length, and thus can play a reliable connection role between cooling components 3 with small spacing.

[0052] In one possible implementation, multiple connectors 400 are arranged along a first direction X, and the liquid inlet portions 401 on adjacent connectors 400 are connected to each other via a connecting assembly 500, and the liquid outlet portions 402 on adjacent connectors 400 are also connected via the connecting assembly 500. One connector 400 located at one edge along the first direction X forms an input seat 410, and an input portion 404 is disposed on the input seat 410. Another connector 400 located at the other edge along the first direction X forms an output seat 420, and an output portion 405 is disposed on the output seat 420. This configuration of the connectors 400 reduces the number of connecting pipes 403 used, as a single liquid inlet pipe 201 and a single liquid outlet pipe 202 can meet the liquid inlet and outlet requirements of all heat exchange units 300, significantly reducing the number of piping components used.

[0053] It is understood that, as an alternative implementation, only some adjacent connectors 400 can be connected by the connecting assembly 500 to form a cooling group, and multiple connectors 400 can form a smaller number of cooling groups, which can improve the reliability and uniformity of coolant flowing into each connector 400.

[0054] In one possible implementation, the liquid inlet 401 and / or the liquid outlet 402 have a connecting pipe 403 for connecting the connecting assembly 500. The connecting assembly 500 includes a pipe body 501, a limiting member 502, and a nozzle 504. The pipe body 501 has a cavity extending in a first direction X. The limiting member 502 is disposed on the pipe body 501, and the nozzle 504 is disposed at the end of the pipe body 501 along the first direction X. The nozzle 504 is inserted into the connecting pipe 403, and the end of the connecting pipe 403 abuts against the limiting member 502. The relative position of the connecting tube 403 and the tube body 501 can be positioned by the limiting member 502 without the need for additional top parts. The structure is simple and reliable and can control the maximum insertion amount. In addition, the limiting member 502 cooperates with the end of the connecting tube 403. The end structure of the connecting tube 403 has high strength and is not easily damaged. This can prevent the connecting assembly 500 from directly acting on the body of the liquid inlet 401 or the liquid outlet 402 and damaging it.

[0055] The end of the connecting pipe 403 is the opening of the connecting pipe 403 away from the liquid inlet 401 or the liquid outlet 402.

[0056] In one possible implementation, on the input socket 410, the input section 404 is located on the side of the liquid inlet section 401 away from the heat exchange section 300; on the output socket 420, the output section 405 is located on the side of the liquid outlet section 402 away from the heat exchange section 300. This arrangement of the input section 404 and output section 405 reduces the height of the connector 400 while allowing the input section 404 and output section 405 to be further away from the battery cell 6, facilitating connection of the input section 404 and output section 405 to their corresponding pipelines.

[0057] In one possible implementation, multiple connectors 400 are arranged along a first direction X, and the liquid inlet portions 401 on adjacent connectors 400 are connected to each other through a connecting assembly 500, and the liquid outlet portions 402 on adjacent connectors 400 are connected to each other through a connecting assembly 500; one connector 400 located at one edge along the first direction X forms an input seat 410, and an input portion 404 is disposed on the input seat 410; one connector 400 located at the other edge along the first direction X forms an output seat 420, and an output portion 405 is disposed on the output seat 420. In this form, all connectors 400 are located at the same end of the heat exchange section 300, which can effectively reduce the space occupied by the cooling assembly 3.

[0058] Specifically, when the connecting seats 400 of different heat exchange sections 300 are located at different ends, space needs to be reserved at both ends of the heat exchange section 300 for the installation of the connecting seats 400. This arrangement will greatly increase the installation space required for the cooling assembly 3. In this embodiment, the connecting seats 400 are arranged sequentially at intervals along the first direction X, so that the connecting seats 400 are all located at the same end of the heat exchange section 300, thus eliminating the need for installation space at one end of the heat exchange section 300.

[0059] In one possible implementation, along the second direction Y, both the inlet pipe 201 and the outlet pipe 202 are located on the side of the connector 400 away from the heat exchange section 300. This type of fluid delivery assembly 2 avoids heat exchange between the coolant flowing inside and the battery cell 6, thus preventing situations where localized cooling effects are prominent and the internal temperature uniformity of the battery pack deteriorates.

[0060] In one possible implementation, the heat exchange sections 300 of adjacent cooling components 3 are arranged in parallel, and the battery pack also has a third direction Z intersecting the first direction X and the second direction Y. The orthographic projection of the heat exchange section 300 along the third direction Z is a polygonal shape. After the cooling device 1 is assembled with the battery cell 6, the heat exchange sections 300 corresponding to the adjacent cooling components 3 can directly fix the position of the battery cell 6 without the need for additional positioning components, which can effectively reduce the number of components required for positioning the battery cell 6.

[0061] The heat exchange section 300 includes multiple heat dissipation sections connected in sequence along the second direction Y.

[0062] Specifically, the included angle between adjacent heat dissipation sections in a cooling component 3 is not limited and can be obtuse, right, or acute, as long as it is set in a zigzag shape.

[0063] Preferably, adjacent heat dissipation sections in a cooling assembly 3 are arranged at an obtuse angle.

[0064] In one possible implementation, each connecting assembly 500 has two limiting members 502. These two limiting members 502 are spaced apart along a first direction X on the tube body 501 and correspond to two adjacent connecting tubes 403. Each end of the tube body 501 along the first direction X has a nozzle 504, which is inserted into the two adjacent connecting tubes 403. The two limiting members 502 abut against the corresponding connecting tubes 403. This type of limiting member 502 can abut against the corresponding connecting tubes 403. Because there is a certain gap between the limiting members 502, when adjacent connecting tubes 403 are compressed axially, the connecting tubes 403 can continue to move a certain distance after breaking through the limitation of the limiting members 502. This can act as a buffer when subjected to external impacts, reducing the risk of damage to the inlet section 401 and the outlet section 402, and improving the safety of the cooling device 1.

[0065] It is understood that, as an alternative implementation, the limiting member 502 can also be a single limiting member 502, with one limiting member 502 abutting and cooperating with the connecting pipes 403 on both sides respectively.

[0066] In one possible implementation, the limiting member 502 extends circumferentially along the tube body 501. This type of limiting member 502 has better integrity, and when the limiting member 502 and the corresponding connecting tube 403 abut against each other, the force on both is more even.

[0067] It is understood that, as an alternative implementation, the limiting member 502 may also be a plurality of positioning members arranged at circumferential intervals along the tube body 501, such as positioning blocks, positioning rods, etc.

[0068] In one possible implementation, the connecting assembly 500 further includes a seal 503 disposed on the pipe body 501 and located between the nozzle 504 and the limiting member 502, with the connecting pipe 403 abutting against the nozzle 504 via the seal 503. The seal 503 effectively improves the reliability of the connection between the connecting pipe 403 and the nozzle 504, preventing coolant leakage.

[0069] The number of sealing elements 503 between a connecting pipe 403 and a pipe body 501 is not limited; there can be one or more, and the specific number can be selected according to the requirements.

[0070] In one possible implementation, the outer wall of the tube body 501 is provided with a plurality of annular grooves 5011 at intervals along the first direction X. The annular grooves 5011 are disposed between the nozzle 504 and the limiting member 502 and are used to install the sealing member 503. The annular grooves 5011 can restrict the movement of the sealing member 503 along the axial direction and further increase the contact area during sealing to ensure the reliability of the seal.

[0071] In one possible implementation, the heat exchange section 300 includes a cooling channel 301 and a weight reduction cavity 302. Both the cooling channel 301 and the weight reduction cavity 302 extend along the second direction Y and are spaced apart along the third direction Z. The cooling channel 301 is connected to the liquid inlet section 401 and the liquid outlet section 402. In this type of heat exchange section 300, the coolant flowing through the cooling channel 301 can cool the battery cell 6. The weight reduction cavity 302 can reduce the amount of coolant that can be contained inside the heat exchange section 300. By adjusting the volume ratio of the cooling channel 301 and the weight reduction cavity 302 inside the heat exchange section 300 during manufacturing, the total amount of coolant inside the heat exchange section 300 can be effectively controlled. This can effectively reduce the weight of the heat exchange section 300 during the heat dissipation process while meeting the heat dissipation requirements of the battery cell 6.

[0072] In addition, since the liquid inlet 401 and the liquid outlet 402 are directly connected to the cooling channel 301, there is no risk of coolant entering the weight reduction chamber 302. Therefore, when manufacturing the heat exchanger 300, it is not necessary to seal the weight reduction chamber 302 at the end, which can effectively simplify the structure of the heat exchanger 300 and reduce the weight and manufacturing difficulty of the heat exchanger 300.

[0073] In one possible implementation, a single heat exchange section 300 contains one cooling channel 301. The cooling channel 301 includes multiple heat exchange sections 3015 and at least one connecting section 3016. The multiple heat exchange sections 3015 are arranged parallel and spaced apart along a third direction Z within the heat exchange section 300. At least one heat exchange section 3015 communicates with the liquid inlet section 401 and at least one heat exchange section 3015 communicates with the liquid outlet section 402. The connecting section 3016 is located at the end of each heat exchange section 3015, and adjacent heat exchange sections 3015 are connected end-to-end via the connecting section 3016. A weight-reducing cavity 302 is provided between adjacent heat exchange sections 3015. This type of cooling channel 301 has a simple structure and fewer connection points, allowing the coolant to flow fully within the heat exchange section 300, improving the efficiency and uniformity of the heat exchange section 300 in cooling the battery cell 6.

[0074] Specifically, this type of cooling channel 301 is S-shaped inside the heat exchange section 300.

[0075] In one possible implementation, there are four heat exchange sections 3015, which are connected end-to-end by connecting sections 3016 to form a cooling channel 301. The heat exchange sections 3015 located on either side along the third direction Z are connected to the liquid inlet section 401 and the liquid outlet section 402, respectively. This type of cooling channel 301 improves the temperature uniformity of the heat exchange section 300 along its extension direction, preventing the portion of the heat exchange section 300 closer to the liquid inlet section 401 from having a significantly better cooling effect than the portion farther from the liquid inlet section 401, thus improving the uniformity of the cooling process of the battery cell 6.

[0076] In one possible implementation, a single heat exchange section 300 contains multiple cooling channels 301, which are spaced apart. Each cooling channel 301 is connected to both an inlet section 401 and an outlet section 402, and a weight-reducing chamber 302 is formed between adjacent cooling channels 301. The coolant circulates simultaneously within the multiple cooling channels 301, effectively improving the cooling efficiency of the heat exchange section 300. The coolant can flow through multiple cooling channels 301 simultaneously using only a single inlet section 401 and a single outlet section 402, resulting in a simple, reliable structure with a small number of components.

[0077] In one possible implementation, the cooling channel 301 in a single heat exchange section 300 includes a first cooling channel 3011 and a second cooling channel 3012. The first cooling channel 3011 and the second cooling channel 3012 are spaced apart, and the liquid inlet and liquid outlet of the first cooling channel 3011 and the second cooling channel 3012 are both located at the same end of the heat exchange section 300 along the second direction Y. Along the first direction X, the projection of the second cooling channel 3012 on the heat exchange section 300 surrounds the projection of the first cooling channel 3011 on the heat exchange section 300.

[0078] It should be noted that, for example Figure 8 and Figure 9 The dashed lines with arrows in the diagram illustrate whether the number of cooling channels 301 in the heat exchange section 300 is one or more.

[0079] In one possible implementation, the inner wall of the cooling channel 301 and / or the weight reduction cavity 302 is provided with reinforcing ribs 303. The reinforcing ribs 303 can further improve the overall structural strength of the heat exchange part 300, reduce the deformation of the heat exchange part 300 under stress during the cooling process, and ensure that the heat exchange part 300 continues to be in contact with the battery cell 6.

[0080] Specifically, there is no limitation on the specific location of the reinforcing rib 303. It can be set alone in the cooling channel 301 or the weight reduction cavity 302, or the reinforcing rib 303 can be set in both the cooling channel 301 and the weight reduction cavity 302. There is no limitation on the number of reinforcing ribs 303. One can be set in each cooling channel 301 and the weight reduction cavity 302, or multiple can be set. The choice can be made flexibly according to the needs.

[0081] Preferably, in order to avoid the reinforcing rib 303 from obstructing the flow of coolant, the extending direction of the reinforcing rib 303 is consistent with the extending direction of the corresponding cooling channel 301 or weight reduction cavity 302.

[0082] In one possible implementation, the heat exchange section 300 further includes a connecting section 304, which is located at the end of the heat exchange section 300 along the second direction Y. The heat exchange section 300 is connected to the liquid inlet section 401 and the liquid outlet section 402 via the connecting section 304. The connecting section 304 can form a reliable connection support structure at the liquid inlet and liquid outlet of the cooling channel 301, which facilitates the connection between the cooling channel 301 and the liquid inlet section 401 and the liquid outlet section 402, while also reducing the risk of leakage during the plug-in connection, thus improving the convenience of component assembly and the reliability of the component after assembly.

[0083] It is understood that, as an alternative implementation, the connecting part 304 may be omitted, and a portion of the liquid inlet 401 and the liquid outlet 402 may be inserted into the cooling channel 301.

[0084] In one possible implementation, each of the multiple battery cells 6 has two opposing first sidewalls 601 along the first direction X and two opposing second sidewalls 602 along the second direction Y. The area of ​​the first sidewalls 601 is larger than that of the second sidewalls 602. The two first sidewalls 601 are respectively arranged opposite to the heat exchange sections 300 of two adjacent cooling components 3. This arrangement of battery cells 6 allows their larger wall surface to contact the heat exchange section 300 of the cooling device 1, thereby improving the heat exchange efficiency.

[0085] In one possible implementation, each row of cells 6 is arranged along its own length.

[0086] The number of battery cells 6 between the two corresponding heat dissipation sections is not limited; it can be one or more.

[0087] Preferably, one side of a heat dissipation section corresponds to only one battery cell 6.

[0088] According to an embodiment of the present invention, in another aspect, an electrical device is provided, which includes the battery pack as described above.

[0089] In this embodiment, the electrical equipment also includes a body, and the battery pack is disposed on the body.

[0090] Specifically, electrical equipment includes: pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, etc.

[0091] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack having intersecting first direction (X) and second direction (Y), characterized in that, include: The box (7) has a storage space (701); A cooling device (1) includes an infusion assembly (2) and a cooling assembly (3), both of which are disposed within the receiving space (701); wherein The infusion assembly (2) includes an inlet pipe (201) and an outlet pipe (202); The cooling components (3) are multiple and spaced apart along the first direction (X). Each cooling component (3) includes a heat exchange part (300) and a connecting seat (400). The heat exchange part (300) extends along the second direction (Y) and has a cooling channel (301) for coolant to flow through. The connecting seat (400) is disposed on one side of the heat exchange part (300) along the second direction (Y) and has a liquid inlet (401) and a liquid outlet (402). In the same cooling component (3), the liquid inlet (401) and the liquid outlet (402) are respectively connected to the two ends of the cooling channel (301). The plurality of liquid inlet sections (401) are interconnected and arranged along the first direction (X), and the plurality of liquid outlet sections (402) are interconnected and arranged along the first direction (X); At least two of the connectors (400) each have an input section (404) and an output section (405). One end of the input section (404) is connected to the liquid inlet section (401) provided in the same connector (400), and the other end is connected to the liquid inlet pipe (201). One end of the output section (405) is connected to the liquid outlet section (402) provided in the same connector (400), and the other end is connected to the liquid outlet pipe (202). Multiple battery cells (6) are disposed within the accommodating space (701), and the battery cells (6) are located between the heat exchange sections (300) of the adjacent cooling assembly (3) and exchange heat with them.

2. The battery pack according to claim 1, characterized in that, The cooling device (1) further includes a connecting assembly (500), wherein at least two adjacent liquid inlets (401) are connected through the connecting assembly (500), and both ends of the connecting assembly (500) are respectively inserted into the corresponding liquid inlets (401); and / or, At least two adjacent liquid outlets (402) are connected by the connecting component (500), with both ends of the connecting component (500) inserted into the corresponding liquid outlets (402).

3. The battery pack according to claim 2, characterized in that, The plurality of connecting seats (400) are arranged along the first direction (X), and the liquid inlet (401) on adjacent connecting seats (400) are all connected through the connecting assembly (500), and the liquid outlet (402) on adjacent connecting seats (400) are all connected through the connecting assembly (500). One of the plurality of connectors (400) located at one edge along the first direction (X) forms an input connector (410), and an input part (404) is disposed on the input connector (410); one of the plurality of connectors (400) located at the other edge along the first direction (X) forms an output connector (420), and an output part (405) is disposed on the output connector (420).

4. The battery pack according to claim 3, characterized in that, The liquid inlet (401) and / or the liquid outlet (402) have a connecting pipe (403) for connecting the connecting assembly (500); The connecting assembly (500) includes a tube body (501), a limiting member (502), and a nozzle (504). The tube body (501) has a cavity extending in the first direction (X). The limiting member (502) is disposed on the tube body (501), and the nozzle (504) is disposed at the end of the tube body (501) along the first direction (X). The nozzle (504) is inserted into the connecting tube (403), and the end of the connecting tube (403) abuts against the limiting member (502).

5. The battery pack according to claim 4, characterized in that, The connecting assembly (500) further includes a sealing element (503), which is disposed on the tube body (501) and located between the nozzle (504) and the limiting element (502), and the connecting tube (403) abuts against the nozzle (504) through the sealing element (503).

6. The battery pack according to any one of claims 3 to 5, characterized in that, On the input seat (410), the input part (404) is located on the side of the liquid inlet part (401) away from the heat exchange part (300); on the output seat (420), the output part (405) is located on the side of the liquid outlet part (402) away from the heat exchange part (300).

7. The battery pack according to claim 6, characterized in that, Along the second direction (Y), both the inlet pipe (201) and the outlet pipe (202) are located on the side of the connecting seat (400) away from the heat exchange section (300).

8. The battery pack according to any one of claims 1 to 5, characterized in that, The heat exchange sections (300) of the adjacent cooling components (3) are arranged in parallel, and the battery pack also has a third direction (Z) that intersects the first direction (X) and the second direction (Y). The heat exchange section (300) is zigzag-shaped when projected along the third direction (Z).

9. The battery pack according to any one of claims 1 to 3, characterized in that, Each of the multiple battery cells (6) has two opposing first sidewalls (601) along the first direction (X) and two opposing second sidewalls (602) along the second direction (Y). The area of ​​the first sidewall (601) is larger than that of the second sidewall (602). The two first sidewalls (601) are respectively disposed opposite to the heat exchange parts (300) of the two adjacent cooling assemblies (3).

10. An electrical appliance, characterized in that, include: The battery pack as described in any one of claims 1 to 9.

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