Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment. The battery pack comprises a total positive output component, a total negative output component and a plurality of battery packs, the plurality of battery packs are arranged in an array and are connected in series between the total positive output component and the total negative output component, and the plurality of battery packs comprise a first battery pack of which the positive electrode is directly connected with the total positive output component and a second battery pack of which the negative electrode is directly connected with the total negative output component; the first battery pack and the second battery pack are arranged along a first direction, and a positive electrode of the first battery pack is positioned on one side, far away from the second battery pack, of the first battery pack and / or a negative electrode of the second battery pack is positioned on one side, far away from the first battery pack, of the second battery pack. According to the battery pack provided by the utility model, the risk of mistaken touch of the total positive output component and the total negative output component in the assembly process and the risk of arc discharge caused by heat diffusion in the use process can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and electrical equipment. Background Art

[0002] The battery pack in an electric vehicle generally includes a total positive copper bar, a total negative copper bar, and a plurality of battery packs connected in series between the total positive copper bar and the total negative copper bar, wherein adjacent battery packs are connected in series via the copper bar. However, in the related art, the total positive copper bar and the total negative copper bar are both arranged close to the middle channel of the battery pack, which poses the risk of accidental touch during assembly and the risk of arcing due to heat diffusion during use. Utility Model Content

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a battery pack and an electric device.

[0004] To achieve the above object, the first aspect of the present invention provides a battery pack, the battery pack comprising:

[0005] Total positive output component;

[0006] a total negative output component; and

[0007] A plurality of battery groups are arranged in an array and connected in series between the total positive output component and the total negative output component, the plurality of battery groups comprising a first battery group whose positive pole is directly connected to the total positive output component, and a second battery group whose negative pole is directly connected to the total negative output component, the first battery group and the second battery group are arranged along a first direction, and the positive pole of the first battery group is located on a side of the first battery group away from the second battery group and / or the negative pole of the second battery group is located on a side of the second battery group away from the first battery group.

[0008] The battery pack provided by the utility model uses the positive electrode of the first battery group as the total positive electrode of the multiple battery groups, and uses the negative electrode of the second battery group as the total negative electrode of the multiple battery groups, and arranges the positive electrode of the first battery group to be located on a side away from the second battery group and / or the negative electrode of the second battery group to be located on a side away from the first battery group, so that the total positive pole and the total negative pole of the multiple battery groups are staggered, which can lengthen the distance between the total positive pole and the total negative pole, thereby avoiding the risk of accidental touching of the total positive output component and the total negative output component during assembly, and the risk of arcing caused by heat diffusion during use, which can greatly improve the safety of the battery pack.

[0009] Optionally, the battery pack further includes a first connecting component, a second connecting component, and a protection component connected between the first connecting component and the second connecting component;

[0010] The number of the multiple battery packs is 2*x, and the 2*x battery packs are divided into a first battery pack unit and a second battery pack unit. The battery packs in the first battery pack unit are arranged along a second direction, and the first connecting component and the total positive output component are respectively located on two opposite sides of the first battery pack unit along the second direction, and the battery packs in the first battery pack unit are connected in series in sequence between the total positive output component and the first connecting component; the battery packs in the second battery pack unit are arranged along the second direction, and the second connecting component and the total negative output component are respectively located on two opposite sides of the second battery pack unit along the second direction, and the battery packs in the second battery pack unit are connected in series in sequence between the total negative output component and the second connecting component; wherein, x≥1, and the second direction is perpendicular to the first direction.

[0011] Optionally, the protection component includes a voltage-dividing relay, the voltage-dividing relay includes a first end and a second end, the first end of the voltage-dividing relay is connected to the first connecting component, and the second end of the voltage-dividing relay is connected to the second connecting component.

[0012] Optionally, the protection component further includes a fuse element connected between the voltage-sharing relay and the second connecting component.

[0013] Optionally, the protection component further includes an N-line relay, which is connected to the fuse element and is used to control the 2*x battery packs to perform self-heating.

[0014] Optionally, the fuse element is arranged between the voltage-sharing relay and the N-line relay, and the fuse element includes a connecting plate and a fuse body, the connecting plate has a first end and a second end opposite to each other, the first end of the connecting plate is connected to the second end of the voltage-sharing relay, the second end of the connecting plate is connected to the N-line relay, one end of the fuse body is connected to a portion between the first end and the second end of the connecting plate, and the other end of the fuse body is connected to the second connecting component.

[0015] Optionally, the protection assembly is located on a side of the second battery pack unit away from the first battery pack unit along the first direction.

[0016] Optionally, the battery pack further includes a power distribution assembly, which is electrically connected to both the total positive output component and the total negative output component, and the power distribution assembly is located on a side of the second battery pack unit away from the first battery pack unit along the first direction.

[0017] Optionally, the battery pack further includes a component shell, the component shell being located on a side of the second battery pack unit away from the first battery pack unit along a first direction, the component shell having a accommodating cavity, and the power distribution component and the protection component being both installed in the accommodating cavity of the component shell.

[0018] Optionally, the battery pack also includes a tray, the multiple battery packs are installed in the tray, a accommodating cavity is provided between a side of the second battery pack unit away from the first battery pack unit along the first direction and a side wall of the tray, and the power distribution assembly and the protection assembly are both installed in the accommodating cavity between a side of the second battery pack unit away from the first battery pack unit along the first direction and the side wall of the tray.

[0019] Optionally, the battery pack further includes a front drive connection component, the front drive connection component extends along the first direction, and at least a portion of the structure is located between two adjacent battery packs in the second direction.

[0020] The second aspect of the present invention further provides an electrical device, which includes the battery pack described in the first aspect.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the first structure of a battery pack provided by an embodiment of the utility model;

[0023] Figure 2 This is a second structural schematic diagram of a battery pack provided by an embodiment of the utility model;

[0024] Figure 3 This is a third structural schematic diagram of a battery pack provided by an embodiment of the utility model;

[0025] Figure 4 This is a fourth structural schematic diagram of a battery pack provided by an embodiment of the utility model;

[0026] Figure 5 yes Figure 1 Structural diagram of power distribution components and protection components in FIG.

[0027] Figure 6 yes Figure 1 Schematic diagram of the internal structure of the protection component.

[0028] The following are the descriptions of the reference numerals:

[0029] Battery Pack 100

[0030] Battery Pack 10

[0031] The first battery pack 11

[0032] Second battery pack 12

[0033] The third battery pack 13

[0034] Fourth battery pack 14

[0035] Total positive output component 21

[0036] Total negative output component 22

[0037] The first connecting member 31

[0038] The second connecting member 32

[0039] Front drive connection component 40

[0040] Component housing 60

[0041] Power distribution components 61

[0042] Protection component 62

[0043] Tray 70

[0044] Voltage divider relay Q1

[0045] Fuse element Q2

[0046] Connecting plate Q21

[0047] Insurance Q22

[0048] N line relay Q3

[0049] The following specific implementation manner will illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0052] Please also read Figure 1 to Figure 4 The utility model provides a battery pack 100 , which includes a total positive output component 21 , a total negative output component 22 and a plurality of battery groups 10 .

[0053] Among them, the multiple battery groups 10 are arranged in an array and connected in series between the total positive output component 21 and the total negative output component 22, and the multiple battery groups 10 include a first battery group 11 whose positive pole is directly connected to the total positive output component 21, and a second battery group 12 whose negative pole is directly connected to the total negative output component 22, the first battery group 11 and the second battery group 12 are arranged along a first direction, and the positive pole of the first battery group 11 is located on a side of the first battery group 11 away from the second battery group 12 and / or the negative pole of the second battery group 12 is located on a side of the second battery group 12 away from the first battery group 11.

[0054] The total positive output component 21 and the total negative output component 22 are both conductive connectors, and copper busbars may be used, that is, the total positive output component 21 is a total positive copper busbar, and the total negative output component 22 is a total negative copper busbar.

[0055] The positive electrode of the first battery group 11 is directly connected to the total positive output component 21, which means that there is no other battery group between the first battery group 11 and the total positive output component 21, that is, the positive electrode of the first battery group 11 is the total positive electrode of the multiple battery groups 10. There is no other battery group between the second battery group 12 and the total negative output component 22, that is, the negative electrode of the second battery group 12 is the total negative electrode of the multiple battery groups 10.

[0056] The battery pack 100 provided by the utility model uses the positive electrode of the first battery group 11 as the total positive electrode of the multiple battery groups 10, and uses the negative electrode of the second battery group 12 as the total negative electrode of the multiple battery groups 10, and arranges the positive electrode of the first battery group 11 to be located on a side away from the second battery group 12 and / or the negative electrode of the second battery group 12 to be located on a side away from the first battery group 11, so that the total positive electrode and the total negative electrode of the multiple battery groups 10 are staggered, and the distance between the total positive electrode and the total negative electrode can be lengthened, thereby avoiding the risk of accidental touch of the total positive output component 21 and the total negative output component 22 during assembly, and the risk of arcing caused by heat diffusion during use, which can greatly improve the safety of the battery pack 100.

[0057] In some embodiments, the battery pack 100 further includes a first connecting component 31 , a second connecting component 32 , and a protection component 62 connected between the first connecting component 31 and the second connecting component 32 .

[0058] The first connecting component 31 and the second connecting component 32 are both conductive connecting parts, and may be copper busbars. That is, the first connecting component 31 is the negative copper busbar of the N line, and the second connecting component 32 is the positive copper busbar of the N line.

[0059] The number of the plurality of battery packs 10 is 2*x, and the 2*x battery packs 10 are divided into a first battery pack unit and a second battery pack unit, that is, the first battery pack unit and the second battery pack unit each include x battery packs 10. The battery packs 10 in the first battery pack unit are arranged along the second direction, the first connecting component 31 and the total positive output component 21 are respectively located on opposite sides of the first battery pack unit along the second direction, and the battery packs 10 in the first battery pack unit are sequentially connected in series between the total positive output component 21 and the first connecting component 31. The battery packs 10 in the second battery pack unit are arranged along the second direction, the second connecting component 32 and the total negative output component 22 are respectively located on opposite sides of the second battery pack unit along the second direction, and the battery packs 10 in the second battery pack unit are sequentially connected in series between the total negative output component 22 and the second connecting component 32. Wherein, x≥2, and the second direction is perpendicular to the first direction.

[0060] At this time, 2*x battery packs 10 are connected in series between the total positive output component 21 and the total negative output component 22 through the first connecting component 31 , the second connecting component 32 and the protection component 62 .

[0061] In this way, the first connecting component 31 and the total positive output component 21 are respectively arranged on the opposite sides of the first battery pack unit along the second direction, and the second connecting component 32 and the total negative output component 22 are respectively arranged on the opposite sides of the second battery pack unit along the second direction, so that there is at least one battery pack 10 between the first connecting component 31 and the total positive output component 21, and between the second connecting component 32 and the total negative output component 22, thereby reserving a larger electrical gap, which can prevent arcing between the total positive output component 21 and the first connecting component 31 due to heat diffusion, and prevent arcing between the total negative output component 22 and the second connecting component 32 due to heat diffusion, thereby further improving the safety of the battery pack 100.

[0062] Below Figure 1 Taking the structure of the battery pack 100 provided by the present invention as an example, the structure of the battery pack 100 provided by the present invention is described in detail. Figure 1 As shown, the plurality of battery packs 10 include a first battery pack 11, a second battery pack 12, a third battery pack 13 and a fourth battery pack 14. The sizes of the battery packs 10 are the same. Of course, in other embodiments, the plurality of battery packs 10 may also be other numbers, such as 6 or 8 (such as Figure 4 shown), 10, and so on.

[0063] exist Figure 1 In the battery pack 100 shown, the first direction is the Y-axis direction, and the second direction is the X-axis direction. For the convenience of description, the utility model refers to the XO direction as the left side, the OX direction as the right side, the OY direction as the upper side, and the YO direction as the lower side. The first battery pack 11 and the third battery pack 13 constitute the first battery pack unit, and the second battery pack 12 and the fourth battery pack 14 constitute the second battery pack unit. In this embodiment, the positive and negative electrodes of each of the battery packs 10 are arranged on the same side of the battery pack body. Specifically, as Figure 1 As shown, the positive pole of the battery pack 10 in the first battery pack unit is arranged at the lower left corner of the battery pack body, and the negative pole is arranged at the lower right corner of the battery pack body, and the negative pole of the battery pack 10 close to the total positive output component 21 of the two adjacent battery packs 10 in the first battery pack unit is adjacent to the positive pole of the other battery pack 10 and connected by a copper busbar. The negative pole of the battery pack 10 in the second battery pack unit is arranged at the lower left corner of the battery pack body, and the positive pole is arranged at the lower right corner of the battery pack body, and the positive pole of the battery pack 10 close to the total negative output component 22 of the two adjacent battery packs 10 in the second battery pack unit is adjacent to the negative pole of the other battery pack 10 and connected by a copper busbar. In this way, the electrodes of opposite polarities of adjacent battery packs 10 in the same battery pack unit are closest to each other, thereby saving copper busbars. Figure 2 In the embodiment shown, the positive electrode and the negative electrode of each battery pack 10 can also be arranged at diagonal positions of the battery pack body. Figure 3 In the embodiment shown, the positive electrode of the first battery group 11 may also be arranged on a side of the battery pack body away from the second battery group 12, so that the electrical distance between the positive electrode of the first battery group 11 and the negative electrode of the second battery group 12 is larger, and safety is higher.

[0064] In some embodiments, the protection component 62 is located on a side of the second battery unit that is away from the first battery unit along the first direction.

[0065] In some embodiments, the battery pack 100 also includes a power distribution component 61, which is electrically connected to the total positive output component 21 and the total negative output component 22, and the power distribution component 61 is located on a side of the second battery pack unit away from the first battery pack unit along the first direction.

[0066] Exemplarily, the power distribution assembly 61 may include a battery disconnect unit (BDU), one end of which is connected to the total positive output component 21 and the total negative output component 22, and the other end is used to be electrically connected to an electrical device (not shown in the figure). The battery disconnect unit is used to turn on or off the electrical connection between the battery pack 100 and the electrical device, thereby controlling the electrical device to receive or cut off power. In some embodiments, the power distribution assembly 61 may also include a battery management system (BMS), which can monitor the battery pack through the low-voltage control harness inside the battery pack 10.

[0067] like Figure 1 and Figure 5 As shown, in some embodiments, the battery pack also includes a tray 70, and the multiple battery packs 10 are installed in the tray 70. Specifically, the tray 70 may include a side wall and a bottom wall, and the side wall is arranged on the outer peripheral edge of the bottom wall and extends in a ring shape along the circumference of the bottom wall. For example, the side wall may be a four-sided ring, and the multiple battery packs 10 are installed in an upper open accommodating cavity jointly defined by the side wall and the bottom wall.

[0068] There is a accommodating cavity between the side of the second battery pack unit away from the first battery pack unit along the first direction and the side wall of the tray 70, and the distribution component 61 and the protection component 62 are both installed in the accommodating cavity between the side of the second battery pack unit away from the first battery pack unit along the first direction and the side wall of the tray 70.

[0069] In some embodiments, the battery pack 100 further includes a component housing 60, and the component housing 60 is located on a side of the second battery pack unit away from the first battery pack unit along the first direction. The component housing 60 has a receiving cavity, and the power distribution component 61 and the protection component 62 are both installed in the receiving cavity of the component housing 60.

[0070] In this way, the main circuit power distribution component 61 and the protection component 62 of the battery pack 100 are both arranged on the same side of the battery pack 100 and integrated in the same component shell 60. Compared with the prior art in which the power distribution component and the protection component of the battery pack are respectively arranged on opposite sides of the battery pack, the degree of integration is higher, which is conducive to miniaturized design.

[0071] like Figure 6 As shown, in some embodiments, the protection component 62 includes a voltage-dividing relay Q1, and the voltage-dividing relay Q1 includes a first end and a second end. The first end of the voltage-dividing relay Q1 is connected to the first connecting component 31, and the second end of the voltage-dividing relay Q1 is connected to the second connecting component 32.

[0072] At this time, 2*x battery packs 10 are connected in series between the total positive output component 21 and the total negative output component 22 through the first connecting component 31 , the second connecting component 32 and the voltage-dividing relay Q1 .

[0073] The voltage-sharing relay Q1 is also electrically connected to the battery management system, and divides the 2*x battery packs 10 into the first battery pack unit and the second battery pack unit. The battery pack 100 can monitor the 2*x battery packs 10 through the battery management system. When the battery management system determines through monitoring that a fault occurs inside the battery pack 100, such as excessive temperature, excessive voltage, excessive current, etc., the battery management system can control the voltage-sharing relay Q1 to disconnect, so that the first battery pack unit and the second battery pack unit are disconnected by the voltage-sharing relay Q1, so that the power distribution component 61 cannot receive power from the 2*x battery packs 10 and cannot supply power to the power-consuming device, and then the battery pack 100 can isolate the fault from the inside. When the fault is a misjudgment or the fault is resolved, the battery management system controls the voltage-sharing relay Q1 to turn on again, so that the first battery pack unit and the second battery pack unit are connected by the voltage-sharing relay Q1, so that the power distribution component 61 can receive power from the 2*x battery packs 10 and can supply power to the power-consuming device.

[0074] In some embodiments, the protection component 62 further includes a safety element Q2 connected between the voltage-sharing relay Q1 and the second connecting component 32 .

[0075] At this time, 2*x battery packs 10 are connected in series between the total positive output component 21 and the total negative output component 22 through the first connecting component 31 , the second connecting component 32 , the voltage-dividing relay Q1 , and the fuse element Q2 .

[0076] In this way, when a fault occurs inside the battery pack 100 and the voltage-sharing relay Q1 fails and cannot be disconnected, the fuse element Q2 can be disconnected, thereby further improving the safety of the battery pack 100 .

[0077] In some embodiments, the protection component 62 further includes an N-line relay Q3 , which is connected to the second connection component 32 and is used to control the plurality of battery packs 10 to perform self-heating.

[0078] Exemplarily, the N-line relay Q3 is also connected to a battery management system. When the battery management system detects that the ambient temperature is too low, the N-line relay Q3 can be controlled to be turned on, so that the multiple battery packs 10 can be self-heated.

[0079] In some embodiments, the insurance element Q2 is a special-shaped (T-shaped) insurance, which is arranged between the voltage-sharing relay Q1 and the N-line relay Q3. Specifically, the insurance element Q2 includes a connecting plate Q21 and an insurance body Q22, the connecting plate Q21 has a first end and a second end opposite to each other, the first end of the connecting plate Q21 is connected to the second end of the voltage-sharing relay Q1, the second end of the connecting plate Q21 is connected to the N-line relay Q3, one end of the insurance body Q22 is connected to the portion between the first end and the second end of the connecting plate Q21, and the other end of the insurance body Q22 is connected to the second connecting component 32.

[0080] In this way, the second end of the voltage-dividing relay Q1 and the N-line relay Q3 can be connected to one end of the fuse body Q22 without installing an additional copper busbar, which leads to a higher degree of integration.

[0081] In some embodiments, the battery pack 100 further includes a front drive connection component 40 , which extends along the first direction, and at least a portion of the structure is located between two adjacent battery packs 10 in the second direction.

[0082] The precursor connecting component 40 is a conductive connecting member, which may be a copper busbar, namely, a precursor positive copper busbar and a precursor negative copper busbar which are arranged in parallel and at intervals.

[0083] For example, Figure 1As shown, part of the structure of the front-drive connecting component 40 is located in the middle channel between the first battery pack 11 and the third battery pack 13 , and another part of the structure is located in the middle channel between the first battery pack 11 and the third battery pack 13 .

[0084] In this way, the front-drive connecting component 40, the output component (including the total positive output component 21 and the total negative output component 22), and the connecting component (including the first connecting component 31 and the second connecting component 32) are arranged at intervals in the second direction, that is, only the front-drive connecting component 40 is arranged in the middle channel between the multiple battery packs 10, and it is at least one battery pack 10 away from the total positive output component 21 and the total negative output component 22 in the second direction, and at least one battery pack 10 away from the first connecting component 31 and the second connecting component 32 in the second direction, thereby reserving a larger electrical gap, which can prevent arcing between the front-drive connecting component 40 and the total positive output component 21 and the total negative output component 22 due to heat diffusion, and prevent arcing between the front-drive connecting component 40 and the first connecting component 31 and the second connecting component 32 due to heat diffusion, thereby further improving the safety of the battery pack 100.

[0085] Based on the same concept, the present invention further provides an electric device (not shown), the electric device comprising the battery pack 100 described in any of the above embodiments. Exemplarily, the electric device is a vehicle.

[0086] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: Total positive output component; Total negative output component; as well as A plurality of battery groups are arranged in an array and connected in series between the total positive output component and the total negative output component, the plurality of battery groups comprising a first battery group whose positive pole is directly connected to the total positive output component, and a second battery group whose negative pole is directly connected to the total negative output component, the first battery group and the second battery group are arranged along a first direction, and the positive pole of the first battery group is located on a side of the first battery group away from the second battery group and / or the negative pole of the second battery group is located on a side of the second battery group away from the first battery group.

2. The battery pack according to claim 1, characterized in that: The battery pack further includes a first connecting component, a second connecting component, and a protection component connected between the first connecting component and the second connecting component; The number of the multiple battery packs is 2*x, and the 2*x battery packs are divided into a first battery pack unit and a second battery pack unit. The battery packs in the first battery pack unit are arranged along a second direction, and the first connecting component and the total positive output component are respectively located on two opposite sides of the first battery pack unit along the second direction, and the battery packs in the first battery pack unit are connected in series in sequence between the total positive output component and the first connecting component; the battery packs in the second battery pack unit are arranged along the second direction, and the second connecting component and the total negative output component are respectively located on two opposite sides of the second battery pack unit along the second direction, and the battery packs in the second battery pack unit are connected in series in sequence between the total negative output component and the second connecting component; wherein, x≥2, and the second direction is perpendicular to the first direction.

3. The battery pack according to claim 2, characterized in that: The protection component includes a voltage-dividing relay, and the voltage-dividing relay includes a first end and a second end. The first end of the voltage-dividing relay is connected to the first connecting component, and the second end of the voltage-dividing relay is connected to the second connecting component.

4. The battery pack according to claim 3, characterized in that: The protection component further includes a safety element connected between the voltage dividing relay and the second connecting component.

5. The battery pack according to claim 4, characterized in that: The protection component further includes an N-line relay, which is connected to the fuse element and is used to control the 2*x battery packs to perform self-heating.

6. The battery pack according to claim 5, characterized in that: The fuse element is arranged between the voltage-sharing relay and the N-line relay, and includes a connecting plate and a fuse body. The connecting plate has a first end and a second end opposite to each other, the first end of the connecting plate is connected to the second end of the voltage-sharing relay, the second end of the connecting plate is connected to the N-line relay, one end of the fuse body is connected to a portion between the first end and the second end of the connecting plate, and the other end of the fuse body is connected to the second connecting component.

7. The battery pack according to any one of claims 2 to 6, characterized in that: The protection assembly is located at a side of the second battery unit away from the first battery unit along the first direction.

8. The battery pack according to claim 7, characterized in that: The battery pack further includes a power distribution assembly, which is electrically connected to both the total positive output component and the total negative output component, and is located on a side of the second battery pack unit away from the first battery pack unit along the first direction.

9. The battery pack according to claim 8, characterized in that: The battery pack also includes a component shell, which is located on a side of the second battery pack unit away from the first battery pack unit along a first direction. The component shell has a accommodating cavity, and the power distribution component and the protection component are both installed in the accommodating cavity of the component shell.

10. The battery pack according to claim 8, characterized in that: The battery pack also includes a tray, the multiple battery packs are installed in the tray, a receiving cavity is provided between a side of the second battery pack unit away from the first battery pack unit along the first direction and a side wall of the tray, and the power distribution assembly and the protection assembly are both installed in the receiving cavity between a side of the second battery pack unit away from the first battery pack unit along the first direction and the side wall of the tray.

11. The battery pack according to any one of claims 2 to 6, characterized in that: The battery pack further includes a front drive connecting component, which extends along the first direction, and at least a portion of the structure is located between two adjacent battery packs in the second direction.

12. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 11.

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