Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment, the battery pack comprises a box body, and a cooling device comprises a liquid conveying assembly and a cooling assembly; the liquid conveying assembly comprises a liquid inlet pipe and a liquid outlet pipe; each cooling assembly comprises a heat exchange part, a liquid inlet part and a liquid outlet part, and each heat exchange part extends in the second direction and is internally provided with a cooling channel; the cooling channel is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are located at the same end of the heat exchange part in the second direction. The liquid inlet is communicated with the liquid inlet pipe through the liquid inlet part, and the liquid outlet is communicated with the liquid outlet pipe through the liquid outlet part; and a plurality of battery cells. The temperature of the cooling liquid is gradually increased and the heat exchange efficiency is reduced in the direction far away from the liquid inlet, and the temperature of the cooling liquid is gradually reduced and the heat exchange efficiency is increased in the direction far away from the liquid outlet. The heat dissipation effects of all the sections of the heat exchange part in the length direction of the heat exchange part tend to be consistent.

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 an arrangement in which liquid cooling plates are placed 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 arrangement, the coolant flows into the liquid cooling plate from one end and flows out from the other end. The cooling effect of the cells near the liquid cooling plate inlet is significantly better than that of the cells near the liquid cooling plate outlet. This results in a large difference in the cooling effect of different cells inside the battery pack, which is not conducive to the overall thermal balance management within the battery pack. Utility Model Content

[0004] In view of this, the present invention provides a battery pack and electrical equipment to solve the problem of poor cooling uniformity of existing spaced liquid cooling plates.

[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 delivery component and a cooling component, both disposed within the receiving space; wherein the liquid delivery component includes an inlet pipe and an outlet pipe; multiple cooling components are spaced apart along the first direction, each cooling component including a heat exchange section, an inlet section, and an outlet section, the heat exchange section extending along the second direction and having a cooling channel for coolant flow inside, the cooling channel being reciprocated within the heat exchange section along the second direction; each end of the cooling channel has an inlet and an outlet, the inlet and outlet being located at the same end of the heat exchange section along the second direction; the inlet and outlet are located at the same end of the heat exchange section, and the inlet is connected to an inlet pipe through the inlet section, and the outlet is connected to an outlet pipe through the outlet section; and multiple battery cells are disposed within the receiving space, with some battery cells located between the heat exchange sections of adjacent cooling components and capable of heat exchange with them.

[0006] Beneficial effects: The inlet and outlet of the cooling channel are located at the same end of the heat exchange section. The temperature of the coolant gradually increases and the heat exchange efficiency decreases along the direction away from the inlet, while the temperature of the coolant gradually decreases and the heat exchange efficiency increases along the direction away from the outlet. Through the superposition of multiple channels with gradually decreasing and gradually increasing heat exchange efficiency, the heat dissipation effect of each section along the length of the heat exchange section tends to be consistent. This avoids the situation where there are large temperature differences between different cells when cooling a row of cells, and effectively solves the problem of poor cooling uniformity of existing spaced liquid cooling plates.

[0007] In one optional embodiment, the battery pack further has a third direction intersecting the first and second directions. The cooling channel includes a plurality of heat exchange sections and at least one connecting section. The heat exchange sections extend along the second direction, and the plurality of heat exchange sections are spaced apart along the third direction. Adjacent heat exchange sections are connected end to end by the connecting section to form a cooling channel. One of the plurality of heat exchange sections located at the edge along the third direction has a liquid inlet, and another heat exchange section located at the other edge along the third direction has a liquid outlet.

[0008] Beneficial effects: This type of cooling channel has a simple structure and fewer inlet and outlet sections, which allows the coolant to flow fully in the heat exchange section, improving the efficiency and uniformity of the heat exchange section in cooling the battery cell.

[0009] In one optional embodiment, the cooling channels in a single heat exchange section include a first cooling channel and a second cooling channel, the first cooling channel and the second cooling channel are spaced apart, and the liquid inlet and outlet of the first cooling channel and the liquid inlet and outlet of the second cooling channel are both located at the same end of the heat exchange section along a second direction; along a first direction, the projection of the second cooling channel on the heat exchange section surrounds at least a portion of the projection of the first cooling channel on the heat exchange section.

[0010] Beneficial effects: Coolant can flow through multiple cooling channels simultaneously through a single inlet and a single outlet, resulting in a simple and reliable structure with fewer components.

[0011] In one optional embodiment, the battery pack further has a third direction intersecting the first and second directions, and the heat exchange section also has a weight reduction cavity, which is spaced apart from the cooling channel along the third direction.

[0012] Beneficial effects: In this type of heat exchanger, the coolant can cool the battery cell by flowing through the cooling channel. The weight reduction cavity can reduce the amount of coolant that can be contained inside the heat exchanger. By adjusting the volume ratio of the cooling channel and the weight reduction cavity inside the heat exchanger during manufacturing, the total amount of coolant inside the heat exchanger can be effectively controlled. This can effectively reduce the weight of the heat exchanger during the heat dissipation process while meeting the heat dissipation requirements of the battery cell.

[0013] In one optional embodiment, the cooling assembly further includes a connecting seat, which is connected to the heat exchange section. Both the liquid inlet and the liquid outlet are located on the connecting seat, and the connecting seats are arranged sequentially at intervals along a first direction.

[0014] Beneficial effects: This type of connector is located at the same end of the heat exchange section, which can effectively reduce the space occupied by the cooling components.

[0015] In one alternative embodiment, both the inlet pipe and the outlet pipe are located on the side of the connector away from the heat exchange section.

[0016] 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.

[0017] In one optional embodiment, the cooling device further includes a connecting assembly; the liquid inlet or liquid outlet has a connecting pipe, and the connecting pipes of two adjacent liquid inlets or liquid outlets are connected by the connecting assembly; the connecting assembly includes a pipe body and a nozzle, the pipe body is provided with a cavity extending in a first direction, and two nozzles are respectively disposed at both ends of the pipe body along the first direction, and the two nozzles are respectively inserted into adjacent connecting pipes.

[0018] 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 liquid inlet and liquid outlet, 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.

[0019] In one optional embodiment, the cooling assembly further includes a connecting seat, which connects to the heat exchange section, and both the liquid inlet and liquid outlet are located on the connecting seat. Multiple connecting seats are arranged along a first direction, and the liquid inlets of the multiple connecting seats are interconnected, as are the liquid outlets of the multiple connecting seats. At least one connecting seat also has an input section, one end of which is connected to the liquid inlet section disposed on the same connecting seat, and the other end of which is connected to an inlet pipe. At least another connecting seat also has an output section, one end of which is connected to the liquid outlet section disposed on the same connecting seat, and the other end of which is connected to an outlet pipe.

[0020] Beneficial effects: Multiple connection functions can be achieved simultaneously through a single connector component. Each heat exchanger can be connected to adjacent heat exchangers 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.

[0021] In one optional embodiment, the battery pack further has a third direction intersecting the first and second directions, the heat exchange sections of adjacent cooling components are arranged in parallel, and the orthographic projection of the heat exchange section along the third direction on the housing is a broken line shape, and / or, multiple cells each have two opposing first sidewalls along the first direction and two opposing second sidewalls along the second direction, the area of ​​the first sidewall is larger than that of the second sidewall, and the two first sidewalls are respectively arranged opposite to the heat exchange sections of two adjacent cooling components.

[0022] Beneficial effects: After the cooling device and the battery cell are assembled, the heat exchange section corresponding to the adjacent cooling components 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. In addition, this arrangement of battery cells allows its larger wall surface to contact the heat exchange section of the cooling device, improving heat exchange efficiency.

[0023] Secondly, this utility model also provides an electrical device that includes the aforementioned battery pack. 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 The diagram shown is a three-dimensional representation of the cooling assembly and battery cell assembly.

[0037] Figure 13 for Figure 1 The image shows a three-dimensional schematic diagram of the battery pack after assembly.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Cooling device; 2. Infusion assembly; 201. Inlet pipe; 202. Outlet pipe;

[0040] 3. Cooling assembly; 300. Heat exchange section; 301. Cooling channel; 3011. First cooling channel; 3012. Second cooling channel; 3013. Liquid inlet; 3014. Liquid outlet; 3015. Heat exchange section; 3016. Connecting section; 302. Weight reduction chamber; 303. Reinforcing rib; 304. Connecting part;

[0041] 400. Connecting seat; 401. Liquid inlet; 402. Liquid outlet; 403. Connecting pipe; 404. Input section; 405. Output section;

[0042] 500. Connecting assembly; 501. Pipe body; 5011. Annular groove; 502. Limiting element; 503. Sealing element; 504. Nozzle;

[0043] 6. Battery cell; 7. Housing; 701. Housing space; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0044] 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.

[0045] In related technologies, the coolant usually flows unidirectionally along the arrangement direction of the cells 6. In this cooling method, the cooling effect of the cells 6 near the coolant inlet is usually much better than that of the cells 6 far from the coolant inlet, which will lead to uneven temperature of a row of cells 6 and poor thermal balance in the battery pack.

[0046] The following is combined with Figures 1 to 13 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, comprising: 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 disposed within 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 spaced apart along the first direction X, each cooling assembly 3 including a heat exchange section 300, an inlet section 401, and an outlet section 402, the heat exchange section 300 extending along the second direction Y and having a cooling channel 301 for coolant flow inside, the cooling channel 300... 1. The cooling channel 301 is reciprocated within the heat exchange section 300 along the second direction Y; the two ends of the cooling channel 301 have liquid inlet 3013 and liquid outlet 3014 respectively, and the liquid inlet 3013 and liquid outlet 3014 are located at the same end of the heat exchange section 300 along the second direction Y; the liquid inlet section 401, the liquid outlet section 402 and the liquid inlet 3013 and liquid outlet 3014 are located at the same end of the heat exchange section 300, and the liquid inlet 3013 is connected to the liquid inlet pipe 201 through the liquid inlet section 401, and the liquid outlet 3014 is connected to the liquid outlet pipe 202 through the liquid outlet section 402; a plurality of battery cells 6 are disposed within the accommodating space 701, and some of the battery cells 6 are located between the heat exchange sections 300 of adjacent cooling components 3 and can exchange heat with them.

[0048] In the cooling device 1 of this embodiment, the inlet 3013 and outlet 3014 of the cooling channel 301 are located at the same end of the heat exchange section 300. The temperature of the coolant gradually increases and the heat exchange efficiency decreases along the direction away from the inlet 3013, while the temperature of the coolant gradually decreases and the heat exchange efficiency increases along the direction away from the outlet 3014. Through the superposition of multiple channels with gradually decreasing and gradually increasing heat exchange efficiency, the heat dissipation effect of each segment of the heat exchange section 300 along its own length tends to be consistent. This avoids the situation where there is a large temperature difference between different cells 6 when cooling a row of cells 6, and effectively solves the problem of poor cooling uniformity of existing spaced liquid cooling plates.

[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 battery pack also has a third direction Z intersecting the first direction X and the second direction Y. The cooling channel 301 includes a plurality of heat exchange sections 3015 and at least one connecting section 3016. The heat exchange sections 3015 extend along the second direction Y, and the plurality of heat exchange sections 3015 are spaced apart along the third direction Z. Adjacent heat exchange sections 3015 are connected end to end by the connecting section 3016 to form a cooling channel 301. One of the heat exchange sections 3015 located at the edge along the third direction Z has a liquid inlet 3013, and another heat exchange section 3015 located at the other edge along the third direction Z has a liquid outlet 3014. This type of cooling channel 301 has a simple structure and fewer connecting ports, allowing the coolant to flow fully in the heat exchange section 300, improving the efficiency and uniformity of the heat exchange section 300 in cooling the battery cell 6.

[0052] Specifically, this type of cooling channel 301 is S-shaped inside the heat exchange section 300.

[0053] 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.

[0054] Furthermore, the height of the inlet 3013 of the cooling channel 301 is higher than the height of the outlet 3014, and the coolant in the cooling channel 301 flows sequentially from top to bottom along the third direction Z.

[0055] In one possible implementation, the heat exchange section 300 has a plurality of cooling channels 301, which are spaced apart, and each cooling channel 301 is connected to the liquid inlet section 401 and the liquid outlet section 402 respectively.

[0056] In one possible implementation, the cooling channels 301 in a single heat exchange section 300 include 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 3013 and liquid outlet 3014 of the first cooling channel 3011 and the liquid inlet 3013 and liquid outlet 3014 of the second cooling channel are all 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 at least a portion of the projection of the first cooling channel 3011 on the heat exchange section 300. Coolant can flow through multiple cooling channels 301 simultaneously through a single liquid inlet 401 and a single liquid outlet 402, resulting in a simple and reliable structure with a small number of components.

[0057] 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.

[0058] In one possible implementation, the battery pack also has a third direction Z intersecting the first direction X and the second direction Y. The heat exchange section 300 also has a weight reduction cavity 302, which is spaced apart from the cooling channel 301 along the third direction Z. In this type of heat exchange section 300, the coolant can cool the battery cell 6 by flowing through the cooling channel 301. The weight reduction cavity 302 reduces 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, which 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.

[0059] 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.

[0060] Specifically, a weight-reducing cavity 302 is formed between adjacent heat exchange sections 3015 or adjacent cooling channels 301.

[0061] In one possible implementation, the cooling assembly 3 further includes a connecting seat 400, which is connected to the heat exchange section 300. Both the liquid inlet 401 and the liquid outlet 402 are located on the connecting seat 400, and the connecting seats 400 are arranged sequentially at intervals along the first direction X. This type of connecting seat 400, all located at the same end of the heat exchange section 300, effectively reduces the space occupied by the cooling assembly 3.

[0062] 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.

[0063] In one possible implementation, 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 localized overheating that could lead to poor temperature uniformity within the battery pack.

[0064] In one possible implementation, the cooling device 1 further includes a connecting assembly 500; the liquid inlet 401 or liquid outlet 402 has a connecting pipe 403, and the connecting pipes 403 of two adjacent liquid inlet 401 or liquid outlet 402 are connected by the connecting assembly 500; the connecting assembly 500 includes a pipe body 501 and nozzles 504, the pipe body 501 has a cavity extending in a first direction X, and two nozzles 504 are respectively disposed at both ends of the pipe body 501 along the first direction X, and the two nozzles 504 are respectively inserted into adjacent connecting pipes 403. In this plug-in form, the end of the connecting assembly 500 is located inside the liquid inlet 401 and liquid outlet 402. Compared with the pipe body 501 being sleeved outside the liquid inlet 401 and liquid outlet 402, the inner and outer diameters of the pipe body 501 in this embodiment are smaller. This type of pipe 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.

[0065] In one possible implementation, the cooling assembly 3 further includes a connecting seat 400, which is connected to the heat exchange unit 300. The liquid inlet 401 and the liquid outlet 402 are both located on the connecting seat 400. A plurality of connecting seats 400 are arranged along a first direction X. The liquid inlet 401 of the plurality of connecting seats 400 are interconnected, and the liquid outlet 402 of the plurality of connecting seats 400 are interconnected. At least one connecting seat 400 also has an input part 404, one end of which is connected to the liquid inlet 401 disposed on the same connecting seat 400, and the other end of which is connected to the liquid inlet pipe 201. At least another connecting seat 400 also has an output part 405, one end of which is connected to the liquid outlet 402 disposed on the same connecting seat 400, and the other end of which is connected to the liquid outlet pipe 202. The connector 400 adopts an integrated design, which integrates the liquid inlet 401, liquid outlet 402, input 404 and output 405 into the corresponding connector 400. Multiple connection functions can be realized simultaneously through a single component. Each heat exchanger 300 can be connected to the adjacent heat exchanger 300 or the corresponding pipeline through a connector 400, which can effectively reduce the number of connection structures, simplify the structure and reduce the risk of leakage.

[0066] In one possible implementation, the battery pack also has a third direction Z intersecting the first direction X and the second direction Y. The heat exchange sections 300 of adjacent cooling components 3 are arranged in parallel, and the orthographic projection of the heat exchange section 300 along the third direction Z on the housing is a broken line shape. After the cooling device 1 is assembled with the battery cell 6, the heat exchange section 3015 corresponding to the adjacent cooling component 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.

[0067] The heat exchange section 300 includes multiple heat dissipation sections connected in sequence along the second direction Y.

[0068] 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.

[0069] Preferably, adjacent heat dissipation sections in a cooling assembly 3 are arranged at an obtuse angle.

[0070] In one possible implementation, each of the multiple battery cells 6 has two opposing first sidewalls along the first direction X and two opposing second sidewalls along the second direction Y. The area of ​​the first sidewall is larger than that of the second sidewall. The two first sidewalls 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 heat exchange efficiency.

[0071] In one possible implementation, each row of cells 6 is arranged along its own length.

[0072] The number of battery cells 6 between the two corresponding heat dissipation sections is not limited; it can be one or more.

[0073] Preferably, one side of a heat dissipation section corresponds to only one battery cell 6.

[0074] In one possible implementation, adjacent connectors 400 are connected by a connector 500. One end of the connector 400 along the arrangement direction of the plurality of cooling components 3 forms an input connector, and the other end of the connector 400 forms an output connector. The input connector has an input portion 404, and the output connector has an output portion 405. By adopting this form of connector 400, the number of connecting pipes used can be reduced. The liquid inlet and liquid outlet requirements of all heat exchange units 300 can be met by a single liquid inlet pipe 201 and a single liquid outlet pipe 202, which greatly reduces the number of pipe components used.

[0075] 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.

[0076] In one possible implementation, on the input socket, the input section 404 is located on the side of the corresponding liquid inlet section 401 away from the heat exchange section 300; on the output socket, the output section 405 is located on the side of the corresponding 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 also 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 the corresponding pipelines.

[0077] In one possible implementation, the inlet section 401 and / or outlet section 402 have a connecting tube 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 a first direction X. The limiting member 502 is disposed on the outer wall of 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. The relative position of the connecting tube 403 and the tube body 501 can be positioned by the limiting structure without the need for additional top components. The structure is simple and reliable and can control the maximum insertion amount. In addition, the limiting structure cooperates with the end of the connecting tube 403. The end of the connecting tube 403 has high structural strength and is not easily damaged, which can prevent the connecting assembly 500 from directly acting on the body of the inlet section 401 or the outlet section 402 and damaging it.

[0078] 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.

[0079] In one possible implementation, each connecting assembly 500 has two limiting members 502, which are spaced apart along a first direction X on the tube body 501 and correspond to two adjacent connecting tubes 403 respectively. 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 respectively, and the two limiting members 502 abut against the corresponding connecting tubes 403. This type of limiting structure can abut against the corresponding connecting tubes 403 respectively. 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 impact, reducing the risk of damage to the liquid inlet 401 and the liquid outlet 402, and improving the safety of the cooling device 1.

[0080] It is understood that, as an alternative implementation, the limiting structure can also be a single limiting member 502, with each limiting member 502 abutting against the connecting pipes 403 on both sides.

[0081] 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.

[0082] 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.

[0083] In one possible implementation, the connecting assembly 500 further includes a seal 503, the inner wall of the connecting pipe 403 abutting against the outer wall of the nozzle 504 through the seal 503. The seal 503 can effectively improve the reliability of the connection between the connecting pipe 403 and the nozzle 504 and prevent coolant leakage.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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 3013 and the liquid outlet 3014 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 assembled component.

[0090] 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.

[0091] According to an embodiment of the present invention, in another aspect, an electrical device is provided, which includes the battery pack described above.

[0092] In this embodiment, the electrical equipment also includes a body, and the battery pack is disposed on the body.

[0093] Specifically, electrical equipment includes: pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, etc.

[0094] 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 section (300), a liquid inlet section (401), and a liquid outlet section (402). The heat exchange section (300) extends along the second direction (Y) and has a cooling channel (301) inside for the flow of coolant. The cooling channel (301) is reciprocated within the heat exchange section (300) along the second direction (Y). Each end of the cooling channel (301) has a liquid inlet (3013) and a liquid outlet (3014). The liquid inlet (3013) and the liquid outlet (3014) are located at the same end of the heat exchange section (300) along the second direction (Y); the liquid inlet section (401) and the liquid outlet section (402) are located at the same end of the heat exchange section (300) as the liquid inlet (3013) and the liquid outlet (3014), and the liquid inlet (3013) is connected to the liquid inlet pipe (201) through the liquid inlet section (401), and the liquid outlet (3014) is connected to the liquid outlet pipe (202) through the liquid outlet section (402); Multiple battery cells (6) are disposed within the receiving space (701), and some of the battery cells (6) are located between the heat exchange sections (300) of the adjacent cooling assembly (3) and are able to exchange heat with them.

2. The battery pack according to claim 1, characterized in that, The battery pack also has a third direction (Z) intersecting the first direction (X) and the second direction (Y). The cooling channel (301) includes a plurality of heat exchange sections (3015) and at least one connecting section (3016). The heat exchange sections (3015) extend along the second direction (Y). The plurality of heat exchange sections (3015) are spaced apart along the third direction (Z). Adjacent heat exchange sections (3015) are connected end to end by the connecting section (3016) to form a cooling channel (301). One of the plurality of heat exchange sections (3015) located at the edge along the third direction (Z) has the liquid inlet (3013), and another heat exchange section (3015) located at the other edge along the third direction (Z) has the liquid outlet (3014).

3. The battery pack according to claim 1, characterized in that, The cooling channel (301) in a single heat exchange unit (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 (3013) and liquid outlet (3014) of the first cooling channel (3011) and the liquid inlet (3013) and liquid outlet (3014) of the second cooling channel are all located at the same end of the heat exchange unit (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 at least a portion of the projection of the first cooling channel (3011) on the heat exchange section (300).

4. The battery pack according to any one of claims 1 to 3, characterized in that, The battery pack also has a third direction (Z) intersecting the first direction (X) and the second direction (Y), and the heat exchange section (300) also has a weight reduction cavity (302), which is spaced apart from the cooling channel (301) along the third direction (Z).

5. The battery pack according to any one of claims 1 to 3, characterized in that, The cooling assembly (3) further includes a connecting seat (400), which is connected to the heat exchange part (300). The liquid inlet part (401) and the liquid outlet part (402) are both located on the connecting seat (400), and the connecting seats (400) are arranged sequentially at intervals along the first direction (X).

6. The battery pack according to claim 5, characterized in that, 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).

7. The battery pack according to any one of claims 1 to 3, characterized in that, The cooling device (1) further includes a connecting assembly (500); The liquid inlet (401) or the liquid outlet (402) has a connecting pipe (403), and the connecting pipes (403) of two adjacent liquid inlets (401) or liquid outlets (402) are connected by the connecting assembly (500). The connecting assembly (500) includes a tube body (501) and nozzles (504). The tube body (501) has a cavity extending in the first direction (X). The two nozzles (504) are respectively disposed at both ends of the tube body (501) along the first direction (X), and the two nozzles (504) are respectively inserted into the adjacent connecting tubes (403).

8. The battery pack according to claim 1, characterized in that, The cooling assembly (3) further includes a connecting seat (400) that connects to the heat exchange section (300), and both the liquid inlet (401) and the liquid outlet (402) are located on the connecting seat (400). The plurality of connecting seats (400) are arranged along the first direction (X), the liquid inlet (401) of the plurality of connecting seats (400) are interconnected, and the liquid outlet (402) of the plurality of connecting seats (400) are interconnected; At least one of the connecting seats (400) also has an input section (404), one end of which is connected to a liquid inlet section (401) provided in the same connecting seat (400), and the other end is connected to the liquid inlet pipe (201); at least another connecting seat (400) also has an output section (405), one end of which is connected to a liquid outlet section (402) provided in the same connecting seat (400), and the other end is connected to the liquid outlet pipe (202).

9. The battery pack according to any one of claims 1 to 3, characterized in that, The battery pack also has a third direction (Z) intersecting the first direction (X) and the second direction (Y). The heat exchange sections (300) of adjacent cooling components (3) are arranged in parallel, and the orthographic projection of the heat exchange section (300) along the third direction (Z) onto the housing is a polygonal shape. And / or, each of the plurality of said cells (6) has two opposing first sidewalls along the first direction (X) and two opposing second sidewalls along the second direction (Y), the area of ​​the first sidewalls being larger than that of the second sidewalls, and the two first sidewalls being respectively disposed opposite to the heat exchange portions (300) of 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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