Battery pack box body, battery pack and electric equipment

Abstract

The invention relates to a battery pack box body, a battery pack and electric equipment, an accommodating space is arranged in the battery pack box body, and the accommodating space is used for accommodating a plurality of battery cell units; a plurality of mutually independent first gas channels are arranged in the battery pack box body, so that the battery cells of the plurality of battery cell units are suitable for being communicated with the outside of the battery pack through the independent first gas channels. Therefore, it can be ensured that the first gas channel for thermal management of each battery cell unit is independent, so that when a single battery cell unit has a thermal runaway problem, due to the fact that the single battery cell unit corresponds to the independent first gas channel, work of other battery cell units cannot be affected, spreading of thermal runaway is avoided, and the service life of the battery cell unit is prolonged. Therefore, aggravation of thermal runaway of the battery pack can be avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of batteries, and particularly to a battery pack box body, a battery pack and an electrical device. Background Art

[0002] A battery pack is a device for providing energy to an electrical device, which is a core component of the electrical device and also an important direction for future energy transformation. In the related art, heat spread is likely to occur between multiple cell units on the battery pack, resulting in thermal runaway and affecting the thermal management of the entire battery pack. Summary of the Invention

[0003] The purpose of the present disclosure is to provide a battery pack box body, a battery pack and an electrical device to at least partially solve the technical problems existing in the related art.

[0004] To achieve the above purpose, the present disclosure provides a battery pack box body, in which a receiving space is provided for receiving a plurality of cell units;

[0005] A plurality of mutually independent first gas channels are provided in the battery pack box body, so that the cells of the plurality of cell units are adapted to communicate with the outside of the battery pack through separate first gas channels.

[0006] Optionally, the battery pack box body includes a bottom plate structure;

[0007] A plurality of the first gas channels are provided inside the bottom plate structure.

[0008] Optionally, the bottom plate structure includes a first plate, a second plate and at least one partition beam;

[0009] The first plate and the second plate are arranged in a stacked manner, and there is a cavity between the first plate and the second plate;

[0010] The partition beam is arranged in the cavity to divide the cavity into a plurality of the first gas channels;

[0011] A plurality of weak areas communicating with the cavity are provided on the first plate, and the positions of the plurality of weak areas correspond to the explosion-proof valves of the cells in the corresponding cell units.

[0012] Optionally, the second plate includes a main body and a side plate, the side plate is arranged at the four peripheral edges of the main body to define a recessed portion, and the recessed portion and the first plate jointly define the cavity.

[0013] Optionally, one end of the side plate away from the main body has an extension portion, the extension portion is arranged parallel to the main body, and the extension portion is connected to the first plate.

[0014] Optionally, in the direction from the first plate to the second plate, the cross-section of the partition beam gradually increases.

[0015] Optionally, the partition beam is provided with a first plane that contacts the first plate surface; and / or,

[0016] The partition beam is provided with a second plane that contacts the second plate surface.

[0017] Optionally, the partition beam is in non-pressure contact, abutment, welding, or bonding with the first plate; and / or,

[0018] The partition beam is in non-pressure contact, abutment, welding, or bonding with the second plate.

[0019] Optionally, the connection part of the partition beam and the first plate is arranged in dislocation with the weak area.

[0020] Optionally, the bottom plate structure further includes at least one support block;

[0021] At least one of the support blocks is arranged in the cavity, the upper end of the support block is connected to the first plate, and the lower end of the support block is connected to the second plate.

[0022] Optionally, the battery pack box body further includes a plurality of battery pack explosion-proof valves;

[0023] A plurality of independent second gas channels are further provided on the battery pack box body;

[0024] One end of each of the plurality of second gas channels is adapted to communicate with the corresponding first gas channel respectively, and the other end is adapted to be connected to the corresponding battery pack explosion-proof valve.

[0025] Optionally, the plurality of battery cell units are arranged along the width direction of the battery pack box body;

[0026] The plurality of first gas channels are arranged along the width direction of the battery pack box body.

[0027] Optionally, the number of the battery cell units is two, the two battery cell units are symmetrically arranged about the width center of the battery pack box body, the number of the first gas channels is two, and the two first gas channels are symmetrically arranged about the width center of the battery pack box body.

[0028] Optionally, the battery pack box body has two battery pack explosion-proof valves, and the two battery pack explosion-proof valves are installed on the side frames in the length direction of the battery pack box body;

[0029] Two second gas channels are provided on the side frame;

[0030] One of the two second gas channels is connected to one first gas channel and one of the battery pack explosion-proof valves, and the other of the two second gas channels is connected to the other first gas channel and the other battery pack explosion-proof valve.

[0031] Optionally, the battery pack housing includes a tray and an upper cover;

[0032] The tray includes a bottom plate structure and a side frame, the lower end of the side frame is connected to the four peripheral edges of the bottom plate structure, and the upper cover is connected to the upper end of the side frame;

[0033] The accommodation space is jointly defined between the tray and the upper cover;

[0034] The first gas channel is arranged inside the bottom plate structure.

[0035] According to a second aspect of the present disclosure, there is provided a battery pack, including a plurality of battery cell units and the battery pack housing as described above;

[0036] The plurality of battery cell units are arranged in the accommodation space;

[0037] Each battery cell unit corresponds to one of the first gas channels, and each battery cell unit communicates with the outside of the battery pack through the corresponding first gas channel.

[0038] Optionally, each battery cell unit includes a plurality of battery cells, each battery cell is provided with a battery cell explosion-proof valve, and the battery cell explosion-proof valve is correspondingly arranged with the inlet of the first gas channel.

[0039] Optionally, the battery pack includes a bottom plate structure, and the first gas channel is arranged inside the bottom plate structure;

[0040] The battery cell explosion-proof valve is located at the lower end of the battery cell so that the battery cell explosion-proof valve can correspond to the inlet of the first gas channel.

[0041] Optionally, the battery pack further includes a heat exchange structure;

[0042] The heat exchange structure includes a plurality of heat exchange plates, the plurality of heat exchange plates are arranged in parallel, and the heat exchange plates are arranged between adjacent two columns of battery cells;

[0043] Wherein, the flow channels inside the plurality of heat exchange plates are independently arranged.

[0044] Optionally, the heat exchange structure further includes an inlet pipe and an outlet pipe;

[0045] The inlets of the plurality of heat exchange plates are respectively connected to the inlet pipe, and the outlets of the plurality of heat exchange plates are respectively connected to the outlet pipe.

[0046] Optionally, the heat exchange plate extends along the length direction of the battery pack, and the inlet pipe and the outlet pipe extend along the width direction of the battery pack;

[0047] The inlet pipe and the outlet pipe are arranged on the first side in the length direction of the battery pack.

[0048] Optionally, the electrodes of each battery cell unit among the plurality of battery cell units are all located on the second side in the length direction of the battery pack.

[0049] Optionally, any one of the plurality of battery cell units can be charged or discharged independently;

[0050] Some or all of the plurality of battery cell units can be connected in series as a whole for charging or discharging.

[0051] According to a third aspect of the present disclosure, there is provided an electrical device, including a device main body and a battery pack, where the battery pack is installed on the device main body and is used to supply power to the device main body.

[0052] Through the above technical solution, a battery pack box body is provided. By providing a plurality of independent first gas channels communicated with the battery cells of the battery cell units, it can be ensured that the first gas channel of each battery cell unit is independent. Therefore, when a single battery cell unit has a thermal runaway problem, since the single battery cell unit corresponds to an independent first gas channel, it can not affect the operation of other battery cell units. Therefore, thermal spread can be avoided and the aggravation of thermal runaway can be avoided.

[0053] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0055] Figure 1 is a schematic structural diagram of the components of a battery pack provided by an exemplary embodiment of the present disclosure in a disassembled state;

[0056] Figure 2 is a top view of the bottom plate structure provided by an exemplary embodiment of the present disclosure;

[0057] Figure 3 is Figure 2 the cross-sectional view taken along A-A in

[0058] Figure 4 is Figure 3 the enlarged view of part B in

[0059] Figure 5 is Figure 3 An enlarged schematic view of part C;

[0060] Figure 6 Is a top view of the bottom plate structure provided by an exemplary embodiment of the present disclosure with the first plate hidden;

[0061] Figure 7 Is a schematic structural diagram in which each component of the bottom plate structure provided by an exemplary embodiment of the present disclosure is in a disassembled state;

[0062] Figure 8 Is a schematic structural diagram in which each component of the tray provided by an exemplary embodiment of the present disclosure is in a disassembled state;

[0063] Figure 9 Is a schematic structural diagram of the side frame in the length direction of the battery pack provided by an exemplary embodiment of the present disclosure;

[0064] Figure 10 Is a schematic structural diagram of the side frame from another perspective of the side frame in the length direction of the battery pack provided by an exemplary embodiment of the present disclosure;

[0065] Figure 11 is Figure 10 The sectional schematic view of D-D in;

[0066] Figure 12 Is a top view of the heat exchange structure provided by an exemplary embodiment of the present disclosure;

[0067] Figure 13 Is a top view of the heat exchange structure and the battery cell unit in an assembled state provided by an exemplary embodiment of the present disclosure;

[0068] Figure 14 Is a schematic structural diagram of the battery cell provided by an exemplary embodiment of the present disclosure, wherein the explosion-proof valve is arranged at the lower end of the battery cell;

[0069] Figure 15 Is a partial structural diagram of the battery pack provided by an exemplary embodiment of the present disclosure, wherein the tray and the battery cell unit are shown;

[0070] Figure 16 Is a schematic circuit diagram of the battery pack provided by an exemplary embodiment of the present disclosure.

[0071] Description of reference numerals

[0072] 10. Accommodating space, 20. First gas channel, 30. Bottom plate structure, 31. First plate, 32. Second plate, 321. Body, 322. Side plate, 323. Concave portion, 324. Extension portion, 33. Partition beam, 34. Weak area, 35. Support block, 36. Air outlet, 40. Second gas channel, 50. Tray, 51. Side frame, 60. Upper cover, 80. Battery pack explosion-proof valve, 90. Battery cell unit, 91. Battery cell, 911. Battery cell explosion-proof valve, 100. Heat exchange structure, 101. Heat exchange plate, 102. Introduction pipe, 103. Outlet pipe, 110. Switch, 120. Current fuse. Detailed implementation manners

[0073] The following will describe the detailed implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the detailed implementation manners described herein are only for explaining and illustrating the present disclosure, and are not used to limit the present disclosure.

[0074] In the present disclosure, it should be understood that, in the present disclosure, in the case of no contrary description, the orientation terms such as "upper" and "lower" indicate the orientation or position relationship defined based on the drawing direction shown in the corresponding drawings, and are only for facilitating the description of the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it cannot be understood as a limitation to the present disclosure. The terms "inside" and "outside" refer to the inside and outside of the corresponding structural contour. The "length direction" and "width direction" can refer to the Figure 1 and Figure 2 indicated "length direction" and "width direction" shown in the figure. In addition, it should be noted that the terms such as "first" and "second" are used to distinguish one element from another element, and do not have sequence and importance. In addition, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same elements.

[0075] In the description of the present disclosure, it should also be noted that, unless otherwise clearly specified and limited, the terms "arranged", "connected", "linked" and "installed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0076] It is found that in the related art, the main reasons for the easy occurrence of thermal spread and thermal runaway in the battery pack are as follows: multiple battery cell units of the battery pack are connected to the outside of the battery pack through a shared heat dissipation channel. Such a setting will cause when one or a part of the battery cell units has a thermal runaway, it will affect other normal battery cell units, resulting in the aggravation of thermal spread and thermal runaway, and affecting the thermal management work of the entire battery pack.

[0077] In view of this, as Figures 1 to 15 shown, the present disclosure provides a battery pack housing. An accommodation space 10 is provided in the battery pack housing. The accommodation space 10 is used to accommodate a plurality of battery cell units 90. A plurality of independent first gas channels 20 are provided in the battery pack housing, so that the battery cells 91 of the plurality of battery cell units 90 are adapted to communicate with the outside of the battery pack through separate first gas channels 20. Here, the plurality of first gas channels 20 include two or more first gas channels 20.

[0078] In the present disclosure, by providing a plurality of independent first gas channels 20 in communication with the battery cells 91 of the battery cell units 90, it can be ensured that the first gas channel 20 of each battery cell unit 90 is separate. Therefore, when a single battery cell unit 90 has a thermal runaway problem, since the single battery cell unit 90 corresponds to an independent first gas channel 20, it does not affect the operation of other battery cell units 90. Therefore, thermal propagation can be avoided and the exacerbation of thermal runaway can be avoided.

[0079] It can be understood that in the present disclosure, the battery pack housing is a housing structure for accommodating the battery cell units 90, and it can have any suitable structure. For example, optionally, the battery pack housing can refer to, for example, Figure 1 the tray 50 as shown. In this case, the accommodation space 10 can be defined separately by the tray 50. The battery pack housing can also refer to, for example, Figure 1 the tray 50 and the upper cover 60 connected to the upper end of the tray 50 as shown. In this case, the accommodation space 10 can be jointly defined by the tray 50 and the upper cover 60.

[0080] In addition, it can be understood that in the present disclosure, the plurality of battery cell units 90 include two or more battery cell units 90. Each battery cell unit 90 can include at least one battery cell group. Each battery cell group can include a plurality of serially connected battery cells 91. All the battery cells 91 within the same battery cell unit 90 can be serially connected. The battery cell units 90 can be connected in parallel and / or in series.

[0081] The present disclosure does not limit the specific position of the first gas channel 20. For example, the first gas channel 20 can be provided at the top or bottom of the battery pack, and can be specifically designed according to the battery cell 91 (for example, according to the position of the battery cell explosion-proof valve 911) and the structure of the battery pack. It is only necessary to ensure that the first gas channels 20 connecting the plurality of battery cell units 90 are independent and do not affect each other.

[0082] For example, referring to Figures 3 to 5, in an embodiment of the present disclosure, the first gas channel 20 may be disposed at the bottom of the battery pack. Specifically, the battery pack housing includes a bottom plate structure 30, and a plurality (two or more) of first gas channels 20 are disposed inside the bottom plate structure 30. This design facilitates the installation of the battery cells 91 and is also conducive to corresponding to the embodiment in which the explosion-proof valve 911 of the battery cell is disposed at the lower end of the battery cell 91.

[0083] In addition, the first gas channel 20 disposed in the bottom plate structure 30 can also serve as a buffer space for complex mechanical conditions such as knocking (impact) and scraping the bottom of the battery pack, realizing multiple uses of the same space. In other words, the first gas channel 20 can be used for exhaust and also as a buffer space when knocking and scraping the bottom.

[0084] The present disclosure does not limit the composition of the first gas channel 20. For example, an exhaust pipe or an exhaust cavity can be provided, as long as it can communicate the explosion-proof valve 911 of the battery cell 91 in the battery cell unit 90 with the outside of the battery pack housing.

[0085] As Figures 2 to 6 shown, in an embodiment of the present disclosure, the bottom plate structure 30 includes a first plate 31, a second plate 32 and at least one partition beam 33. The first plate 31 and the second plate 32 are stacked, and there is a cavity between the first plate 31 and the second plate 32. The partition beam 33 is disposed in the cavity to divide the cavity into a plurality of first gas channels 20; the function of the partition beam 33 is to divide the cavity formed by the butting connection of the first plate 31 and the second plate 32 into a plurality of independent first gas channels 20. The number of the first gas channels 20 is not limited here and can be determined according to the number of the battery cell units 90.

[0086] Here, the partition beam 33 connects the first plate 31 and the second plate 32. The connection position can be non-pressure contact, crimping (such as thermal pressing connection, abutting), welding or gluing, as long as there is no gap at the connection position. In other words, the partition beam 33 can be in non-pressure contact, crimping (such as thermal pressing connection, abutting), welding or bonding with the first plate 31, and the partition beam 33 can be in non-pressure contact, crimping (such as thermal pressing connection, abutting), welding or bonding with the second plate 32. The present disclosure does not limit this. For example, the partition beam 33 and the first plate 31 and the second plate 32 can be crimped and connected by using the thermal pressing method. The bonding strength is good by using the thermal pressing method, and the connection between the partition beam 33 and the first plate 31 and the second plate 32 is reliable.

[0087] It can be understood that the "non-pressure contact" here means that the partition beam 33 just contacts the first plate 31, the partition beam 33 just contacts the second plate 32, and there is no mutual acting force between the partition beam 33 and the first plate 31 and the second plate 32.

[0088] In the present disclosure, asFigure 1 As shown, each battery cell 91 may be provided with a battery cell explosion-proof valve 911. The battery cell explosion-proof valve 911 may be provided at the lower end of the battery cell 91. A plurality of weak areas 34 communicating with the cavity are provided on the first plate 31, and the positions of the plurality of weak areas 34 correspond to the battery cell explosion-proof valves 911 in the corresponding battery cell unit 90. As Figure 2 shown, the weak area 34 may be provided on the first plate 31. The battery cell unit 90 is installed on the first plate 31. The battery cell 91 of the battery cell unit 90 is provided with a battery cell explosion-proof valve 911. The position of the battery cell explosion-proof valve 911 corresponds to that of the weak area 34. When the battery cell explosion-proof valve 911 is opened, the gas can break through the weak area 34, and the generated gas will flow into the interior of the first gas channel 20 and then be discharged to the outside of the battery pack box body through the first gas channel 20, completing the discharge of the gas.

[0089] The present disclosure does not limit the specific structure of the weak area 34. For example, the weak area 34 may be a through hole or a weak structure (such as a thin film) that can be broken by gas after the battery cell explosion-proof valve 911 is opened.

[0090] In an embodiment where the weak area 34 is a through hole, the through hole is equivalent to the inlet of the first gas channel 20. When the battery cell explosion-proof valve 911 is opened, the generated gas will flow into the interior of the first gas channel 20 through this inlet and then be discharged to the outside of the battery pack box body through the first gas channel 20, completing the discharge of the gas.

[0091] It can be understood that the battery cell explosion-proof valve 911 may be provided not only at the lower end but also at the upper end of the battery cell 91.

[0092] Optionally, the first plate 31 and the second plate 32 may be set as multi-layer hot-pressed composite plates. The inner surface is set as a high-temperature resistant material, and the outer surface is set as an impact-resistant material. The multi-layer setting can not only ensure that the inner surface is set as a high-temperature resistant material but also ensure that the outer surface is set as an impact-resistant material. For example, materials such as metals, alloys, carbon fibers, and high-temperature plastics that maintain stability and mechanical properties at high temperatures are provided inside. The outer surface can be selected to remain intact and not easily break or be damaged when subjected to external forces such as impacts or squeezes. For example, engineering plastics or aluminum alloys are used.

[0093] As Figures 3 to 5 shown, the second plate 32 may include a main body 321 and side plates 322. The side plates 322 are provided at the four peripheral edges of the main body 321 to define a recessed portion 323. The recessed portion 323 and the first plate 31 jointly define a cavity. This cavity is set as the first gas channel 20. Compared with other methods (such as pipes, channels, etc.), the exhaust space is larger, the speed is faster, heat accumulation can be prevented, and the structure is simple.

[0094] To facilitate the connection between the first plate 31 and the second plate 32, asFigure 3 As shown, one end of the side plate 322 away from the main body 321 has an extension 324. The extension 324 can be arranged parallel to the main body 321, and the extension 324 is connected to the first plate 31. Since the multiple first gas channels 20 need to be independent of each other, the connection between the first plate 31 and the second plate 32 needs to be stable and reliable. For example, if the connection position between the first plate 31 and the second plate 32 is loose, the dimensions of the cavity formed by the two in terms of thickness may be inconsistent. However, the provided partition beam 33 is set corresponding to the cavity for the normal connection of the first plate 31 and the second plate 32. Therefore, gaps will be formed between the multiple first gas channels 20 separated by the partition beam 33, and air leakage may occur in these gaps, making it impossible to use the multiple first gas channels 20 independently. By arranging the extension 324 parallel to the main body 321 and connecting the extension 324 to the first plate 31, it is convenient to form a stable and reliable connection between the first plate 31 and the second plate 32.

[0095] As Figure 5 shown, the connection between the side plate 322 and the main body 321 can be provided with a rounded corner, and the connection position of the side plate 322 and the installation extension 324 is provided with a rounded corner. With such a design, the gas transmission can be smooth, and heat accumulation in the corners is not likely to occur. At the same time, it is convenient for processing. The presence of a chamfer is not likely to cause cracks, which can reduce deformation and ensure the service life of the battery pack.

[0096] In the present disclosure, the specific shape of the partition beam 33 is not limited. The function of the partition beam 33 is to partition the cavity and divide the cavity into multiple independent first gas channels 20. As long as the partition beam 33 can connect the first plate 31 and the second plate 32 and there are no connection gaps.

[0097] To ensure good stability of the support and installation of the partition beam 33 after connection, as Figure 4 shown, in the direction from the first plate 31 to the second plate 32, the cross-section of the partition beam 33 gradually increases, that is, the partition beam is constructed in a structure with a smaller upper part and a larger lower part. The cross-sectional width of the partition beam 33 for connecting the second plate 32 is greater than the cross-sectional width of the partition beam 33 for connecting the second plate 32, and the cross-section of the partition beam 33 is similar to a trapezoidal structure.

[0098] In the present disclosure, the partition beam 33 can be provided with a first plane. For example, the upper end surface of the partition beam 33 can be the first plane, and a plane can be correspondingly provided on the first plate 31. The first plane is in surface contact with the first plate 31. In this way, a planar connection can be achieved between the partition beam 33 and the first plate 31, which can improve the reliability of the connection between the partition beam 33 and the first plate 31, and can also improve the sealing performance between the partition beam 33 and the first plate 31, thus being beneficial to improving the independence between the multiple first gas channels 20.

[0099] In the present disclosure, the partition beam 33 may be provided with a second plane. For example, the lower end surface of the partition beam 33 may be the second plane, and a plane may be correspondingly provided on the second plate 32. The second plane is in surface contact with the second plate 32. In this way, a planar connection can be achieved between the partition beam 33 and the second plate 32, which can improve the reliability of the connection between the partition beam 33 and the second plate 32, and can also improve the sealing performance between the partition beam 33 and the second plate 32, thereby being beneficial to improving the independence between multiple first gas channels 20.

[0100] In order to prevent the partition beam 33 from affecting the exhaust of the weak area 34, in the present disclosure, the connection part of the partition beam 33 and the first plate 31 is arranged in a dislocation manner with respect to the weak area 34. That is, the projection of the part where the partition beam 33 is connected to the first plate 31 on the first plate 31 and the projection of the weak area 34 on the first plate 31 are at least partially non - overlapping. In this way, the partition beam 33 will not affect the exhaust or heat dissipation of the weak area 34.

[0101] Since the battery cell unit 90 is installed on the first plate 31 and the entire first plate 31 bears a large weight, in view of this, as Figure 5 and Figure 6 shown, the bottom plate structure 30 further includes at least one support block 35. At least one support block 35 is arranged in the cavity. The upper end of the support block 35 is connected to the first plate 31, and the lower end of the support block 35 is connected to the second plate 32. By providing the support block 35 to support the first plate 31, with the upper end of the support block 35 connected to the first plate 31 and the lower end of the support block 35 connected to the second plate 32, the bearing capacity of the first plate 31 can be effectively improved, which is beneficial to avoiding the problem of the first plate 31 being sunken.

[0102] It should be explained that when the number of support blocks 35 is multiple, as Figure 6 and Figure 7 shown, the multiple support blocks 35 can be evenly arranged on the cavity and can be arranged in a dislocation manner with respect to the weak area 34. The function of the uniform arrangement is to ensure that the entire panel and some positions of the first plate 31 will not have the problem of being sunken, and the position of the entire first plate 31 can be taken into account. In addition, the support block 35 is arranged in a dislocation manner with respect to the weak area 34, so that the support block 35 will not affect the exhaust or heat dissipation of the position of the weak area 34.

[0103] The present disclosure does not limit the specific connection relationship between the support block 35 and the first plate 31 and the second plate 32. For example, welding, bonding or crimping can be adopted. Optionally, in an embodiment of the present disclosure, the connections between the support block 35 and the first plate 31 and the second plate 32 can all be connected by hot - pressing. The bonding strength is good by using the hot - pressing method, and the connection between the first plate 31 and the second plate 32 is reliable.

[0104] In the present disclosure, there is no limitation on how the first gas channel 20 communicates with the outside of the battery pack housing. For example, pipeline connection, cavity, or opening on the sidewall can be used, as long as the first gas channel 20 can be communicated with the outside of the battery pack housing.

[0105] As Figures 8 to 11 shown, the battery pack housing may further include a plurality of battery pack explosion-proof valves 80, and a plurality of independent second gas channels 40 are further provided on the battery pack housing. One ends of the plurality of second gas channels 40 are respectively adapted to communicate with the corresponding first gas channels 20, and the other ends are adapted to connect to the corresponding battery pack explosion-proof valves 80.

[0106] The present disclosure does not limit the position of the second gas channel 40. For example, referring to Figure 7 , an air outlet 36 communicating with the first gas channel 20 can be provided on the first plate 31, and the air outlet 36 is connected to the second gas channel 40. In this way, one end of the second gas channel 40 communicates with the first gas channel 20 by connecting to the air outlet 36, and the other end of the second gas channel 40 communicates with the outside of the battery pack housing through the battery pack explosion-proof valve 80, thus completing the communication between the first gas channel 20 and the outside of the battery pack housing. As Figure 8 shown, the battery pack explosion-proof valve 80 can be installed on the outside of the battery pack housing, specifically on the side frame 51 of the tray 50.

[0107] As Figure 8 shown, the connection position between the second gas channel 40 and the first gas channel 20 can be bonded with structural adhesive to prevent air leakage from the gap.

[0108] The present disclosure does not limit the layout direction of the first gas channel 20, which can be designed according to the specific layout of the plurality of battery cell units 90. As Figures 1 to 3 shown, the plurality of battery cell units 90 are arranged along the width direction of the battery pack housing, and the plurality of first gas channels 20 can be arranged along the width direction of the battery pack housing. With such a design, the first gas channel 20 corresponds to the corresponding battery cell unit 90 in position on the battery pack, which is beneficial to simplifying the structure of the first gas channel 20.

[0109] The present disclosure does not limit the number of the first gas channels 20, which can be specifically determined according to the number of the battery cell units 90.

[0110] Referring to Figure 1 and Figure 15, in the present disclosure, multiple battery cell units 90 may be arranged along the width direction of the battery pack. Each battery cell unit 90 may include at least one battery cell group, and the battery cells 91 in each battery cell group extend along the length direction of the battery pack. In other words, the wide surface (large surface) of each battery cell 91 faces the width direction of the battery pack, and the narrow surface (small surface) of each battery cell 91 faces the length direction of the battery pack. The positive and negative electrodes of the battery cell unit 90 are both located in the direction corresponding to the narrow surface of the battery cell 91.

[0111] It can be understood that the wide surface of the battery cell refers to the surface with a relatively larger area among the multiple surfaces of the battery cell 91 in the length direction of the battery pack. For example, in the installation state where the battery pack is installed at the bottom of the vehicle, the wide surface of the battery cell 91 is the surface defined by the sides in the length direction and the height direction of the battery cell 91. The narrow surface of the battery cell 91 is the surface defined by the sides in the width direction and the height direction of the battery cell 91.

[0112] The present disclosure does not limit the number of battery cells 91 in each battery cell group. Each battery cell group may include multiple rows of battery cells 91 arranged along the length direction of the battery pack, and each row of battery cells includes multiple battery cells 91 arranged along the width direction of the battery pack. In the same battery cell group, the battery cells 91 in each row of battery cells are connected in series, and the adjacent two rows of battery cells are connected in series.

[0113] In Figure 1 and Figure 15 In the shown embodiment, the number of battery cell units 90 is two, and the two battery cell units 90 are arranged along the width direction of the battery pack. Correspondingly, as Figure 3 shown, the number of the first gas channels 20 may be two, and the two first gas channels 20 may be symmetrically arranged about the width center of the battery pack housing, so that the two battery cell units 90 can each utilize the two first gas channels 20 to communicate with the outside of the battery pack.

[0114] In the present disclosure, as Figure 8 shown, the battery pack housing has two battery pack explosion-proof valves 80. The two battery pack explosion-proof valves 80 are installed on the side frame 51 in the length direction of the battery pack housing. The side frame 51 of the battery pack housing in the length direction of the battery pack is provided with two second gas channels 40. One of the two second gas channels 40 communicates one first gas channel 20 and one of the battery pack explosion-proof valves 80, and the other of the two second gas channels 40 communicates the other first gas channel 20 and the other battery pack explosion-proof valve 80.

[0115] Installing the battery pack explosion-proof valve 80 on the side frame 51 in the length direction of the battery pack can save the size in the width direction of the battery pack. When the battery pack is applied to a vehicle, the width space is relatively compact, and this design facilitates the installation of the battery pack during use.

[0116] As Figure 1As shown, according to another aspect of the present disclosure, a battery pack is provided, which includes a plurality of battery cell units 90 and the above-mentioned battery pack housing. The plurality of battery cell units 90 are arranged in the accommodation space 10. Each battery cell unit 90 corresponds to a first gas channel 20, and each battery cell unit 90 communicates with the outside of the battery pack through the corresponding first gas channel 20, that is, each battery cell unit 90 communicates with the outside of the battery pack through a separate first gas channel 20. The battery cell unit 90 here is the battery cell unit 90 mentioned above.

[0117] As Figure 1 shown, the battery pack housing may include a tray 50 and an upper cover 60. The tray 50 includes a bottom plate structure 30 and side frames 51. The lower ends of the side frames 51 are connected to the four peripheral edges of the bottom plate structure 30, and the upper cover 60 is connected to the upper ends of the side frames 51. The tray 50 and the upper cover 60 jointly define the accommodation space 90, and the first gas channel 20 is provided inside the bottom plate structure 30.

[0118] The locking of each component of the battery pack housing can use screw connections, which is convenient for installation and disassembly and has a simple design. For example, the upper cover 60 can be connected to the side frame 51 by screws.

[0119] Optionally, when the battery pack is applicable to a vehicle, the upper cover 60 is adapted to be arranged on the lower side of the vehicle floor, or the upper cover 60 is adapted to be used as part of the vehicle floor, that is, the upper cover 60 can be separate and located below the vehicle floor, or can be used as the vehicle floor (pedal). When it is the latter, it is beneficial to save the Z-direction space of the vehicle, improve the utilization rate of the Z-direction installation space of the vehicle battery pack, allow the installation of a larger-capacity battery, and is beneficial to improving the cruising range of the vehicle.

[0120] In the present disclosure, as Figure 12 and Figure 13 shown, the battery pack may further include a heat exchange structure 100. The heat exchange structure 100 includes a plurality of heat exchange plates 101. The plurality of heat exchange plates 101 are arranged in parallel. A heat exchange plate 101 is provided between adjacent two rows of battery cells 91. Among them, the flow channels inside the plurality of heat exchange plates 101 are independently arranged. For example, the plurality of heat exchange plates 101 can be connected in parallel so that the flow channels inside the plurality of heat exchange plates 101 are independently arranged, so that the plurality of heat exchange plates 101 do not affect each other. The function of arranging the heat exchange plates 101 is to cool or heat the battery cells 91. Since the plurality of heat exchange plates 101 are arranged in parallel and the flow channels inside the plurality of heat exchange plates 101 are independent of each other, in other words, different heat exchange plates 101 do not affect each other, which can ensure the cooling or heating effect.

[0121] Optionally, as Figure 13As shown, each heat exchange plate 101 extends along the length direction of the battery pack. In the width direction of the battery pack, multiple columns of battery cells 91 are arranged, and each column of battery cells 91 may include multiple rows of battery cells 91 arranged in the length direction of the battery pack.

[0122] As Figure 12 shown, the heat exchange plate 101 separates two columns of battery cells 91. The heat exchange plate 101 has a flow channel inside, and a heat exchange medium (liquid or gas) can enter the heat exchange plate 101 from the flow channel inlet to cool or heat the heat exchange plate 101, thereby cooling or heating the battery cells 91. Then, the cold liquid flows out from the outlet of the flow channel to complete the heat exchange with the heat exchange plate 101.

[0123] As Figure 12 and Figure 13 shown, the heat exchange structure 100 may further include an inlet pipe 102 and an outlet pipe 103. The inlets of multiple heat exchange plates 101 are respectively connected to the inlet pipe 102, and the outlets of multiple heat exchange plates 101 are respectively connected to the outlet pipe 103. If the inlet pipe 102 and the outlet pipe 103 are separately connected to each heat exchange plate 101, the pipelines can be shared in the inlet area or the outlet area of the heat exchange medium. Since the areas for cooling or heating the battery cells are independent, the structure can be simplified without affecting the mutual heat exchange effect.

[0124] Optionally, as Figure 1 shown, the heat exchange plate 101 extends along the length direction of the battery pack and contacts the wide surface of the battery cell 91, so that the cooling contact surface is larger and the cooling effect is ensured. The inlet pipe 102 and the outlet pipe 103 extend along the width direction of the battery pack, and the inlet pipe 102 and the outlet pipe 103 are arranged on the first side in the length direction of the battery pack. Such an arrangement facilitates the connection of each heat exchange plate 101.

[0125] Optionally, as Figure 1 shown, the electrodes of each battery cell unit 90 in multiple battery cell units 90 are located on the second side in the length direction of the battery pack, separated from the inlet pipe 102 and the outlet pipe 103 arranged on the first side in the length direction of the battery pack. This is beneficial to the reasonable arrangement of the inlet pipe 102, the outlet pipe 103 and the electrode lead-out parts of the battery cell unit 90, with high space utilization rate, and is also convenient for installation and later maintenance.

[0126] Moreover, by making the inlet pipe 102 and the outlet pipe 103 of the heat exchange structure 100 and the electrodes of the battery cell unit 90 located at different ends, it is beneficial to make the condensed water appearing on the heat exchange structure 100 not easily contact the electrodes, and can effectively reduce or even avoid the risk of battery pack short circuit caused thereby.

[0127] In the present disclosure, insulating parts may be provided between each row of battery cells 91 or between each column of battery cells 91 to increase the creepage distance of high voltage between the battery cells on both sides.

[0128] In the present disclosure, any one of the multiple battery cell units 90 can be charged or discharged independently, and some or all of the multiple battery cell units 90 can be connected in series as a whole for charging or discharging.

[0129] With such a design, the battery pack can have at least a first working mode and a second working mode. In the first working mode, any one of the multiple battery cell units 90 of the battery pack can be charged independently. At this time, the battery pack can be applied to a charging platform with a relatively low charging voltage, and thus can have a conventional charging mode. When in the second working mode, some or all of the multiple battery cell units 90 can be connected in series. At this time, the battery pack can be applied to a charging platform with a relatively high charging voltage, and thus can have a fast charging mode. Therefore, compared with the solution in the related art where the battery pack can only be charged using a charging platform with a fixed voltage, the battery pack provided in the present disclosure can be applicable to charging platforms with different voltages, that is, it can be compatible with voltage platforms of multiple voltages, which is beneficial to convenient daily use.

[0130] Moreover, since the multiple battery cell units 90 in the battery pack can have different working modes, and the number of battery cell units 90 for discharging can be different in different working modes, different discharging modes can be provided, and different voltage power supply modes can be provided for the electric drive components (such as the motor of a vehicle) of the electrical equipment.

[0131] In addition, in the present disclosure, by arranging a single battery box body to accommodate the above-mentioned multiple battery cell units 90, there is no need to arrange multiple battery box bodies for accommodating a single battery cell unit 90. Moreover, the multiple battery cell units 90 can share components (such as the heat exchange structure 100), which can save the space of the battery pack and improve the energy density.

[0132] As mentioned above, in the present disclosure, since each battery cell unit 90 uses an independent gas channel (such as the first gas channel 20 and the second gas channel 40), when one of the battery cell units 90 fails, it will not affect the operation of other battery cell units 90. Therefore, the reliability of the multiple battery cell units 90 outputting independently as the entire battery pack or being connected in series as the entire battery pack is improved. In other words, by making each battery cell unit 90 adopt an independent gas channel (the first gas channel 20 and the second gas channel 40), the reliability of the above-mentioned first working mode and second working mode of the battery pack is ensured.

[0133] As mentioned above, the present disclosure does not limit the number of multiple battery cell units 90. The multiple battery cell units 90 can be designed to have two or more. The number of battery cells 91 included in each battery cell unit 90 is also not limited, and can be designed according to the voltage of the charging platform to be compatible. It only needs to meet the requirements of being able to convert the voltage and being compatible with charging platforms of different voltages.

[0134] The present disclosure does not limit the voltage at which the battery pack is suitable for charging or discharging. Optionally, in an embodiment of the present disclosure, the voltage at which the battery pack is suitable for charging or discharging can be 400V to 800V, including 400V and 800V. For example, currently, it is necessary to be compatible with charging piles of 400V and 800V. In order to adapt to their voltages, two battery cell units 90 suitable for a 400V charging platform can be designed, or alternatively, four battery cell units 90 suitable for a 200V charging platform can be designed. As long as the requirements are met, the voltage applicable to a single designed battery cell unit 90 is not limited.

[0135] For example, when two battery cell units 90 suitable for a 400V charging platform are set, when the connected charging pile is 400V, only a single battery cell unit 90 needs to be charged. At this time, the switch (K1) 110 between the two battery cell units 90 (as Figure 16 shown) can be disconnected. The positive and negative electrodes of one battery cell unit 90 are connected to both ends of the power distribution unit to complete the circuit connection, and the other battery cell unit 90 does not charge; when the connected charging pile is 800V, the two battery cell units 90 work in series. At this time, the switch 110 between the two battery cell units 90 is closed. The positive electrode of one battery cell unit 90 is connected to the negative electrode of the other battery cell unit 90. Both ends of the series circuit can be connected to both ends of the power distribution unit (not shown) to complete the circuit connection. At this time, both battery cell units 90 can be charged. In this way, charging platforms (charging piles) of 400V and 800V can be compatible.

[0136] When the number of battery cell units 90 is three or more, in the second working mode, two or more of the other multiple battery cell units 90 among the multiple battery cell units 90 can be in series, and the remaining battery cell units 90 do not participate in charging or discharging.

[0137] When assembling the battery pack, the positive electrode of each battery cell unit 90 can be electrically connected to the positive electrode end of a power distribution unit, such as the positive electrode end of a high-voltage distribution box (BDU, Battery Disconnect Unit). The power distribution unit is not shown in the figure. The negative electrode of each battery cell unit 90 is adapted to be electrically connected to the negative electrode end of the power distribution unit. Moreover, multiple battery cell units 90 are arranged in series on a certain series circuit of the battery pack, and both ends of this series circuit are respectively connected to the positive electrode end and the negative electrode end of the power distribution unit; a switch 110 is arranged on the series circuit of multiple battery cell units 90 and is used to connect or disconnect the series circuit between multiple battery cell units 90.

[0138] The power distribution unit (high-voltage distribution box) is a battery energy distribution unit and an important component on the high-voltage loop of the electrical equipment. It can distribute the high-voltage electricity of the energy storage device to the electrical equipment, so that the energy storage device can supply power to the electrical equipment. In addition, the power distribution unit can distribute the high-voltage charging current of the AC and DC charging interfaces to the energy storage device to charge the energy storage device.

[0139] As Figure 16 shown, the battery pack may further include a switch 110, and the switch 110 is arranged on the series circuit where multiple battery cell units 90 are located. In this way, by controlling the switch 110 to selectively connect and disconnect the series circuit, that is, by opening and closing the switch 110, at least separate charging or discharging between multiple battery cell units 90 can be realized, or charging or discharging in series of multiple battery module battery cell units 90 can be realized, so that the battery pack can switch between the first working mode and the second working mode.

[0140] The present disclosure does not limit the type of the switch 110, which can be a relay, an electronic switch, a thyristor, a switching diode, etc., as long as the switch 110 can play a function of disconnecting the circuit on the series circuit when a single battery cell unit 90 needs to work; and can play a function of closing the circuit on the series circuit when multiple battery cell units 90 need to work.

[0141] In the embodiment where the switch 110 is a relay, the relay can significantly accelerate the switching time, eliminate the arc and noise existing in the electromechanical device. Essentially, it has better reliability and predictability and a longer service life.

[0142] In the present disclosure, as Figure 6As shown, the electricity storage device may further include a current fuse (F1) 120, which may be disposed on the series circuit where the plurality of battery cell units 90 are located. Due to the arrangement of the current fuse 120, when a short - circuit occurs in the high - voltage circuit of the battery pack, in addition to disconnecting the series circuit through the above - mentioned switch 110 to disconnect the high - voltage circuit of the battery pack, the current fuse 120 can also be used to promptly disconnect the high - voltage circuit, capable of avoiding the thermal runaway risk caused by high - voltage arcing and providing the safety performance of the electricity storage device.

[0143] The battery cell units 90 on the battery pack are independent of each other. The electrode connections of the battery cell units 90 can be independent of each other, the sampling arrangements of the battery cells 91 can be independent of each other, the above - mentioned heat exchange plates 101 are independent of each other, the first gas channels 20 connected to each battery cell unit 90 are independent of each other, and the second gas channels 40 connected to the first gas channels 20 are independent of each other. That is, the structural arrangements affecting the performance of the battery pack are all separated into independent wholes, and the failure of any one party will not have an adverse impact on the other party. It is equivalent to two independent battery packs assembled side by side. When this battery pack is used in a vehicle, if any side fails and loses power during the high - speed driving of the electric vehicle, the other side can still provide electrical energy normally, greatly reducing the risk that the vehicle suddenly loses electrical energy due to battery pack problems and effectively ensuring the safety of the battery pack and the vehicle.

[0144] According to another aspect of the present disclosure, there is provided an electrical device, including a device main body and the above - mentioned battery pack. The battery pack is installed on the device main body and is used to supply power to the device main body.

[0145] Here, the electrical device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel - powered vehicle, a gas - powered vehicle, or a new - energy vehicle. The new - energy vehicle can be a pure - electric vehicle, a hybrid vehicle, or an extended - range electric vehicle, etc. The electric toy includes fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc.; the electric tool includes metal - cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools. The present disclosure does not make any limitations in this regard.

[0146] Optionally, when the electrical device is a vehicle, the battery pack of the present disclosure can be installed on the vehicle body to provide power for the driving of the vehicle.

[0147] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above - mentioned embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0148] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any appropriate manner without conflict.

[0149] Furthermore, any combination can be made among the various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A battery pack housing, characterized in that, A receiving space is provided inside the battery pack box body, and the receiving space is used to accommodate a plurality of battery cell units; A plurality of mutually independent first gas channels are provided inside the battery pack box body, so that the battery cells of the plurality of battery cell units are adapted to communicate with the outside of the battery pack through separate first gas channels.

2. The battery pack housing according to claim 1, characterized in that, The battery pack box body includes a bottom plate structure; A plurality of the first gas channels are provided inside the bottom plate structure.

3. The battery pack housing according to claim 2, characterized in that, The bottom plate structure includes a first plate, a second plate and at least one partition beam; The first plate and the second plate are arranged in a stacked manner, and there is a cavity between the first plate and the second plate; The partition beam is arranged in the cavity to divide the cavity into a plurality of the first gas channels; A plurality of weak areas communicating with the cavity are provided on the first plate, and the positions of the plurality of weak areas correspond to the explosion-proof valves of the battery cells in the corresponding battery cell units.

4. The battery pack housing according to claim 3, characterized in that The second plate includes a main body and side plates, and the side plates are arranged at the four peripheral edges of the main body to define a recessed portion, and the recessed portion and the first plate jointly define the cavity.

5. The battery pack housing according to claim 4, characterized in that, One end of the side plate away from the main body has an extension portion, and the extension portion is arranged parallel to the main body, and the extension portion is connected to the first plate.

6. The battery pack housing according to claim 3, wherein, In the direction from the first plate to the second plate, the cross-section of the partition beam gradually increases.

7. The battery pack housing according to claim 3, characterized in that, The partition beam is provided with a first plane, and the first plane is in contact with the first plate surface; and / or, The partition beam is provided with a second plane, and the second plane is in contact with the second plate surface.

8. The battery pack housing according to claim 3, characterized in that, The partition beam is in non-pressure contact, crimping, welding or bonding with the first plate; and / or, The partition beam is in non-pressure contact, crimping, welding or bonding with the second plate.

9. The battery pack housing according to claim 3, wherein, The connection part of the partition beam and the first plate is arranged in a dislocation manner with respect to the weak area.

10. The battery pack housing according to claim 3, characterized in that, The bottom plate structure further includes at least one support block; At least one of the support blocks is arranged in the cavity, the upper end of the support block is connected to the first plate, and the lower end of the support block is connected to the second plate.

11. The battery pack housing according to claim 1, wherein, The battery pack box body further includes a plurality of battery pack explosion-proof valves; A plurality of independent second gas channels are further provided on the battery pack box body; One ends of the plurality of second gas channels are respectively adapted to communicate with corresponding first gas channels, and the other ends are adapted to be connected to corresponding battery pack explosion-proof valves.

12. The battery pack housing according to any one of claims 1-11, characterized in that, The plurality of battery cell units are arranged along the width direction of the battery pack box body; The plurality of first gas channels are arranged along the width direction of the battery pack box body.

13. The battery pack housing according to claim 12, wherein, The number of the battery cell units is two, and the two battery cell units are symmetrically arranged about the width center of the battery pack box body; The number of the first gas channels is two, and the two first gas channels are symmetrically arranged about the width center of the battery pack box body.

14. The battery pack housing according to claim 13, wherein, The battery pack box body has two battery pack explosion-proof valves, and the two battery pack explosion-proof valves are installed on the side frames in the length direction of the battery pack box body; Two second gas channels are provided on the side frame; One of the two second gas channels communicates with one first gas channel and one battery pack explosion-proof valve, and the other of the two second gas channels communicates with the other first gas channel and the other battery pack explosion-proof valve.

15. The battery pack housing according to any one of claims 1-11, characterized in that, The battery pack housing includes a tray and an upper cover; The tray includes a bottom plate structure and side frames, the lower ends of the side frames are connected to the four peripheral edges of the bottom plate structure, and the upper cover is connected to the upper ends of the side frames; The accommodation space is jointly defined between the tray and the upper cover; The first gas channel is arranged inside the bottom plate structure.

16. A battery pack, characterized in that, It includes a plurality of battery cell units and the battery pack housing according to any one of claims 1-15; The plurality of battery cell units are arranged in the accommodation space; Each battery cell unit corresponds to one of the first gas channels, and each battery cell unit communicates with the outside of the battery pack through the corresponding first gas channel.

17. The battery pack according to claim 16, characterized in that, Each battery cell unit includes a plurality of battery cells, each battery cell is provided with a battery cell explosion-proof valve, and the battery cell explosion-proof valve is correspondingly arranged with the inlet of the first gas channel.

18. The battery pack according to claim 17, wherein, The battery pack includes a bottom plate structure, and the first gas channel is arranged inside the bottom plate structure; The battery cell explosion-proof valve is located at the lower end of the battery cell so that the battery cell explosion-proof valve can correspond to the inlet of the first gas channel.

19. The battery pack according to claim 16, characterized in that, The battery pack further includes a heat exchange structure; The heat exchange structure includes a plurality of heat exchange plates, the plurality of heat exchange plates are arranged in parallel, and the heat exchange plates are arranged between adjacent rows of battery cells; Among them, the flow channels inside the plurality of heat exchange plates are independently arranged.

20. The battery pack according to claim 19, characterized in that, The heat exchange structure further includes an inlet pipe and an outlet pipe; The inlets of the plurality of heat exchange plates are respectively connected to the inlet pipe, and the outlets of the plurality of heat exchange plates are respectively connected to the outlet pipe.

21. The battery pack according to claim 20, characterized in that, The heat exchange plates extend along the length direction of the battery pack, and the inlet pipe and the outlet pipe extend along the width direction of the battery pack; The inlet pipe and the outlet pipe are arranged on the first side in the length direction of the battery pack.

22. The battery pack according to claim 21, characterized in that, The electrodes of each battery cell unit among the plurality of battery cell units are all located on the second side in the length direction of the battery pack.

23. The battery pack according to any one of claims 16-22, characterized in that, Any one of the plurality of battery cell units can be charged or discharged independently; Some or all of the battery cell units among the plurality of battery cell units can be connected in series as a whole for charging or discharging.

24. An electrical device, characterized in that, It includes a device main body and the battery pack according to any one of claims 1-23, and the battery pack is installed on the device main body and used to supply power to the device main body.

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