Battery pack and electric equipment

Abstract

The utility model relates to the technical field of battery packs, and discloses a battery pack and electric equipment, and the battery pack comprises a box body which is provided with an accommodating cavity; the cover plate is connected with the box body and covers and seals the accommodating cavity; the battery pack is arranged in the accommodating cavity, the battery pack comprises a plurality of batteries, the batteries are provided with pole columns, and the pole columns face the cover plate; the isolation plate is arranged between the battery pack and the cover plate, the pole penetrates through the isolation plate, the isolation plate is provided with a plurality of first positioning columns, and the first positioning columns protrude towards the cover plate; the plurality of busbars are respectively mounted on one side, facing the cover plate, of the isolation plate, each busbar is connected with the pole columns of two adjacent batteries, each busbar comprises a first connecting part, a bending part and a second connecting part which are connected in sequence, the first connecting parts and the second connecting parts are connected with the pole columns penetrating through the isolation plate, the bending parts are sunken in the direction far away from the cover plate, and the first connecting parts and the second connecting parts are connected in sequence. The bending part is provided with a through first positioning hole, and the first positioning column is arranged in the first positioning hole in a penetrating mode. The pulling amplitude of the isolation plate can be reduced, and the electrical safety is ensured.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically to a battery pack and an electrical device. Background Technology

[0002] In related technologies, existing battery packs are made up of battery cells connected in series and parallel through busbars. In order to ensure convenient assembly and transportation between the separator and the busbar, the separator and the busbar are assembled into one unit and then fixedly connected. This can ensure that the busbar is not misaligned or lost during the transportation of incoming materials.

[0003] However, the battery will expand and deform during operation. The busbar will also be stretched and deformed because it is connected to the terminal post. The separator plate will also be stretched and damaged because it is fixed to the busbar, resulting in a reduction in creepage distance or electrical clearance. In severe cases, this can cause a short circuit and affect electrical safety. Utility Model Content

[0004] In view of this, the present invention provides a battery pack and electrical equipment to solve the problem of the separator being damaged by the expansion of the battery, which affects electrical safety.

[0005] In a first aspect, this utility model provides a battery pack, comprising: a housing having a receiving cavity; a cover plate connected to the housing and covering the receiving cavity; a battery pack disposed within the receiving cavity, the battery pack comprising multiple batteries, each battery having a terminal post facing the cover plate; a separator plate connected to the side of the battery having the terminal post, the separator plate being disposed between the battery pack and the cover plate, the terminal post passing through the separator plate, the separator plate having multiple first positioning posts, the first positioning posts protruding towards the cover plate; and multiple busbars respectively installed on the side of the separator plate facing the cover plate, each busbar being connected to the terminal posts of two adjacent batteries, each busbar comprising a first connecting portion, a bending portion, and a second connecting portion connected in sequence, the first connecting portion and the second connecting portion being connected to the terminal post passing through the separator plate, the bending portion being recessed in a direction away from the cover plate, the bending portion having a through first positioning hole, the first positioning post passing through the first positioning hole.

[0006] Beneficial effects: The battery pack of this utility model can avoid problems such as busbar damage or failure of connection between busbar and terminal by setting a bending part. By inserting the first positioning post through the first positioning hole, the relative position between the busbar and the separator can be fixed. Since the positioning and fixing position is located on the bending part, when the busbar is pulled, the first connecting part and the second connecting part may be displaced relative to the separator, while the bending part displaces less or not at all relative to the separator. Therefore, the pulling amplitude on the separator can be reduced, avoiding large displacement of the positioning and fixing position and damage to the separator, thus ensuring electrical safety.

[0007] In one optional embodiment, the isolation plate has a groove on the side facing the busbar, the bent portion is recessed away from the cover plate, the first positioning post is disposed on the bottom wall of the groove, and the bent portion is located in the groove.

[0008] Beneficial effects: The groove can accommodate the bend, preventing the gap between the first or second connecting part and the partition plate from being too large due to the presence of the bend. The bend and the groove can also help to position the relative position between the busbar and the partition plate.

[0009] In one alternative embodiment, the isolation plate is provided with a recess near the first positioning post, the recess is recessed in a direction away from the cover plate, and the first positioning post is connected to the side of the recess facing the cover plate.

[0010] Beneficial effects: The area of ​​the isolation plate with the first positioning post has a groove, which creates a concave-convex structure, improving the structural strength of the area of ​​the isolation plate with the first positioning post and reducing the probability of damage to the area of ​​the isolation plate with the first positioning post under stress.

[0011] In one alternative embodiment, the first positioning post has a cavity with an opening located on the side of the sink away from the manifold.

[0012] Beneficial effects: The cavity reduces the material used for the first positioning post, thus lowering costs; the opening facilitates the machining of the cavity.

[0013] In one optional embodiment, the battery pack has a first direction, the separator plate includes a mounting portion and a separator portion, the number of mounting portions and separator portions is multiple, the multiple mounting portions are spaced apart along the first direction, the separator portion is connected to two adjacent mounting portions along the first direction, and the first positioning post is disposed on the mounting portion.

[0014] Beneficial effect: Optimizes the connection between the isolation plate and the busbar.

[0015] In one optional embodiment, the end of the first positioning post facing away from the battery is a blocking part, and the diameter of the blocking part is larger than the diameter of the first positioning hole.

[0016] Beneficial effects: The blocking part can stop the bus from the side away from the battery. The blocking part and the separator limit the bus from opposite sides of the bus, preventing the bus and the separator from separating.

[0017] In one optional embodiment, the battery pack has a first orientation, and the battery pack further includes: a positioning member disposed on the side of the battery where the terminal post is located, the positioning member being located between the separator and the battery; the positioning member being connected to the terminal posts of two adjacent batteries along the first orientation, and the positioning member being connected to the separator.

[0018] Beneficial effects: It enables the positioning and installation of the separator and battery pack, preventing misinstallation, and improves the positioning accuracy between the busbar and the battery terminals, reducing welding errors and product yield caused by misalignment.

[0019] In one optional embodiment, the positioning member has a second positioning post on the side facing the isolation plate, the isolation plate has a second positioning hole through it, and the second positioning post passes through the second positioning hole.

[0020] In one optional embodiment, the positioning member has clearance notches on two sidewalls along the first direction, and two adjacent pole posts are respectively located within the two clearance notches.

[0021] Beneficial effects: It can avoid interference between the positioning component and the terminal post, and the area of ​​the remaining area of ​​the positioning component can be larger, so as to increase the connection area between the positioning component and the battery pack.

[0022] Secondly, this utility model provides an electrical device, including the battery pack described in the first aspect.

[0023] Beneficial effects: The electrical device of this utility model, through the battery pack described in the first aspect, can solve the problem of the separator being damaged by being stretched due to battery expansion. Attached Figure Description

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

[0025] Figure 1This is a schematic diagram of the battery pack structure according to an embodiment of the present invention;

[0026] Figure 2 This is an exploded view of the battery pack according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram showing the connection between the isolation plate and the busbar in an embodiment of the present invention;

[0028] Figure 4 This is a partial structural schematic diagram of the isolation plate according to an embodiment of the present utility model;

[0029] Figure 5 for Figure 4 A magnified view of a portion of region A in the middle;

[0030] Figure 6 for Figure 4 A magnified view of a portion of region B in the middle;

[0031] Figure 7 This is a schematic diagram of the busbar structure according to an embodiment of the present utility model;

[0032] Figure 8 This is a schematic diagram showing the connection between the battery pack and the positioning component in an embodiment of this utility model;

[0033] Figure 9 for Figure 8 A magnified view of a portion of region C in the middle;

[0034] Figure 10 This is a schematic diagram of the battery structure according to an embodiment of the present invention;

[0035] Figure 11 This is a schematic diagram of the positioning component according to an embodiment of the present utility model;

[0036] Figure 12 This is a schematic diagram showing the cooperation between the second positioning post and the isolation plate of the positioning component in an embodiment of this utility model.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Battery pack;

[0039] 100. Box body; 101. Receiving cavity; 102. Cover plate;

[0040] 200. Battery pack; 210. Battery; 211. Terminal post; 212. Top cover;

[0041] 300, isolation plate; 310, first positioning post; 312, cavity; 313, opening; 320, groove; 330, positioning groove; 340, countersunk groove; 350, second positioning hole; 360, mounting part; 370, isolation part;

[0042] 400. Busbar; 410. Bend; 411. First positioning hole; 420. First connecting part; 430. Second connecting part;

[0043] 500. Positioning component; 510. Second positioning post; 520. Clearance gap;

[0044] X, the first direction. Detailed Implementation

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

[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0047] In the description of this utility model, "a plurality of" means two or more. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] The following is combined with Figures 1-12 The embodiments of the present invention are described as shown.

[0050] According to an embodiment of the present invention, in a first aspect, a battery pack 1 is provided, the battery pack 1 including a housing 100, a cover plate 102, a battery pack 200, an isolation plate 300 and a plurality of busbars 400.

[0051] The housing 100 has a receiving cavity 101, and the cover plate 102 is connected to the housing 100 and covers the receiving cavity 101. The battery pack 200 is located in the receiving cavity 101 and includes multiple batteries 210. Each battery 210 has a terminal post 211 facing the cover plate 102. An isolation plate 300 is disposed in the receiving cavity 101 and is connected to the side of the battery 210 with the terminal post 211. The isolation plate 300 is located between the battery pack 200 and the cover plate 102. The terminal post 211 passes through the isolation plate 300. The isolation plate 300 has multiple first positioning posts 310, which protrude towards the cover plate 102.

[0052] The separator 300 can be made of insulating material, such as insulating plastic. The separator 300 can separate the battery pack 200 from the cover plate 102, prevent electrical connection between the battery pack 200 and the cover plate 102, and improve the safety of the battery pack 1.

[0053] Multiple busbars 400 are respectively installed on the side of the separator 300 facing the cover plate 102. Each busbar 400 is connected to the terminal post 211 of two adjacent batteries 210. The busbar 400 includes a first connecting part 420, a bent part 410 and a second connecting part 430 connected in sequence. That is, one end of the bent part 410 is connected to the first connecting part 420 and the other end of the bent part 410 is connected to the second connecting part 430. The first connecting part 420 and the second connecting part 430 are connected to the separator 300. The terminals 211 are connected, that is, the first connecting part 420 is connected to the terminal 211 of one battery 210, and the second connecting part 430 is connected to the terminal 211 of another battery 210. The bent part 410 is recessed in the direction away from the cover plate 102. The bent part 410 is provided with a through first positioning hole 411. The first positioning post 310 passes through the first positioning hole 411. The distance between the first positioning hole 411 and the first connecting part 420 can be equal to the distance between the first positioning hole 411 and the second connecting part 430.

[0054] For example, the battery 210 can have two terminals 211, one of which is the positive terminal 211 and the other is the negative terminal 211. The positive terminal 211 of one battery 210 is connected to the first connection part 420, and the negative terminal 211 of the other battery 210 is connected to the second connection part 430. The busbar 400 connects the two adjacent batteries 210 in series. Furthermore, the separator 300 can be provided with multiple positioning slots 330 on the side facing the cover plate 102. Multiple busbars 400 are correspondingly disposed in multiple positioning slots 330. Each positioning slot 330 is provided with at least one first positioning post 310. By providing positioning slots 330, the relative position between the busbar 400 and the separator 300 can be defined, improving the reliability of the relative position between the busbar 400 and the separator 300.

[0055] During application, the battery 210 may expand, potentially increasing the distance between the terminals 211 of adjacent batteries 210. This causes the two terminals 211 connected to the busbar 400 to exert tension on the busbar 400, which could lead to damage, detachment between the busbar 400 and the terminals 211, or gaps at the connection point, affecting the connection between the busbar 400 and the terminals 211. By providing a bending portion 410, the busbar 400 can be straightened by deformation when stretched, increasing its extension dimension to compensate for the increased distance between the two terminals 211. This prevents damage to the busbar 400 or connection failure between the busbar 400 and the terminals 211, reducing the probability of damage and improving the reliability of the connection between the busbar 400 and the terminals 211.

[0056] By inserting the first positioning post 310 through the first positioning hole 411, the relative position between the busbar 400 and the isolation plate 300 can be fixed. Since the positioning and fixing position is located on the bending part 410, when the busbar 400 is pulled, the first connecting part 420 and the second connecting part 430 may be displaced relative to the isolation plate 300, while the bending part 410 displaces less or not at all relative to the isolation plate 300. Therefore, the pulling amplitude on the isolation plate 300 can be reduced, avoiding large displacement of the positioning and fixing position and damage to the isolation plate 300, thus ensuring electrical safety.

[0057] like Figures 4-7 As shown, in the technical solution of this embodiment, the partition plate 300 has a groove 320 on the side facing the bent portion 410. The groove 320 is recessed in the direction away from the cover plate 102. The first positioning post 310 is disposed on the bottom wall of the groove 320, and the bent portion 410 is located in the groove 320. The side of the bent portion 410 away from the cover plate 102 is in contact with the groove 320, and the groove 320 can be located in the positioning groove 330.

[0058] By providing the groove 320, the bent portion 410 can be accommodated, preventing the gap between the first connecting portion 420 or the second connecting portion 430 and the isolation plate 300 from being too large due to the presence of the bent portion 410. The first connecting portion 420 and the second connecting portion 430 can fit more closely with the isolation plate 300, increasing the contact area between the busbar 400 and the isolation plate 300. Furthermore, the bent portion 410 and the groove 320 can play a role in positioning the relative position between the busbar 400 and the isolation plate 300, which is beneficial to further improving the positioning reliability between the busbar 400 and the isolation plate 300.

[0059] like Figures 4-6 As shown, in the technical solution of this embodiment, the isolation plate 300 is provided with a recess 340 near the first positioning post 310. The recess 340 is recessed in the direction away from the cover plate 102, and the first positioning post 310 is connected to the side of the recess 340 facing the cover plate 102. The recess 340 is located in the groove 320.

[0060] In this way, the area of ​​the isolation plate 300 with the first positioning post 310 will form a concave-convex structure due to the groove 340, which improves the structural strength of the area of ​​the isolation plate 300 with the first positioning post 310, reduces the probability of damage to the area of ​​the isolation plate 300 with the first positioning post 310 under stress, and ensures the positioning effect between the isolation plate 300 and the busbar 400.

[0061] Furthermore, the end of the first positioning post 310 facing away from the battery 210 is a blocking part (not shown in the figure), and the diameter of the blocking part is larger than the diameter of the first positioning hole 411.

[0062] For example, after the first positioning post 310 passes through the first positioning hole 411, the end of the first positioning post 310 away from the battery 210 can be heat-melted, and the heat-melted end of the first positioning post 310 away from the battery 210 forms a blocking part.

[0063] By setting a blocking part, the busbar 400 can be stopped on the side away from the battery 210. The blocking part and the separator 300 limit the busbar 400 from opposite sides, preventing the busbar 400 from separating from the first positioning post 310, and further improving the positioning reliability between the separator 300 and the busbar 400.

[0064] like Figure 4 and Figure 6 As shown, in the technical solution of this embodiment, the first positioning post 310 is provided with a cavity 312 with an opening 313. The opening 313 of the first positioning post 310 is located on the side of the sink 340 away from the busbar 400. The opening 313 is connected to the cavity 312. That is, the opening 313 is located at the end of the first positioning post 310 near the battery 210, and the opening 313 is set towards the battery 210.

[0065] By providing the cavity 312, the material used in the first positioning post 310 can be reduced, lowering costs. Furthermore, the first positioning post 310 is easily deformed by heat to form a blocking part. The opening 313 facilitates the fabrication of the cavity 312. Since the opening 313 is located at the end of the first positioning post 310 near the battery 210, the side of the first positioning post 310 near the cover plate 102 can be closed. This improves the structural strength of the side of the first positioning post 310 near the cover plate 102, reducing the probability of damage from collisions during handling and transportation.

[0066] like Figures 3-5 and Figure 7 As shown, in this embodiment, there are multiple first positioning holes 411, which are spaced apart. Multiple first positioning posts 310 are inserted into the multiple first positioning holes 411 in a one-to-one correspondence. This increases the number of connection points between the busbar 400 and the isolation plate 300, preventing the busbar 400 from rotating relative to the isolation plate 300 around the first positioning holes 411, thus improving the positioning effect and connection stability between the busbar 400 and the isolation plate 300.

[0067] For example, the spacing between adjacent first positioning posts 310 is greater than or equal to 5mm and less than or equal to 130mm. If the spacing between adjacent first positioning posts 310 is less than 5mm, the first positioning posts 310 are too close together, which is not conducive to the installation between the busbar 400 and the isolation plate 300. The dimensional tolerance is prone to errors, which will affect the positioning and installation effect, and in severe cases, even make assembly impossible. If the spacing between adjacent first positioning posts 310 is greater than 130mm, the first positioning posts 310 are too sparse, which will easily lead to a small number of first positioning posts 310, affecting the positioning effect.

[0068] By setting the spacing between adjacent first positioning posts 310 to be greater than or equal to 5mm and less than or equal to 130mm, the spacing between the first positioning posts 310 is moderate, which will not result in too few first positioning posts 310 or too close spacing, thus facilitating the production and processing of the first positioning posts 310, as well as the installation and coordination of the busbar 400 and the isolation plate 300.

[0069] like Figure 4 As shown, in the technical solution of this embodiment, the battery pack 1 has a first direction X, the separator 300 includes a mounting part 360 and a separator 370, the number of mounting parts 360 and separator 370 is multiple, the multiple mounting parts 360 are spaced apart along the first direction X, the separator 370 is connected to two adjacent mounting parts 360 along the first direction X, and the first positioning post 310 is provided on the mounting part 360.

[0070] The isolation section 370 has a through hole to expose the top cover 212. Adhesive can be injected between the isolation plate 300 and the battery pack 200 through the through hole, improving the connection strength between them. The mounting section 360 corresponds to the terminal post 211. The structural strength of the mounting section 360 is generally greater than that of the isolation section 370, and the deformation probability of the mounting section 360 is lower than that of the isolation section 370. By placing the first positioning post 310 on the mounting section 360, the positioning effect between the busbar 400 and the isolation plate 300 can be optimized, further improving installation reliability.

[0071] like Figures 8-12 As shown, in the technical solution of this embodiment, the battery pack 1 has a first direction X. The battery pack 1 also includes a positioning member 500. The positioning member 500 is disposed on the side of the battery 210 where the terminal post 211 is provided. The positioning member 500 is connected to the terminal posts 211 of two adjacent batteries 210 along the first direction X. The positioning member 500 is located between the separator plate 300 and the battery 210, and the positioning member 500 is connected to the separator plate 300. Specifically, the side of the positioning member 500 facing the separator plate 300 is provided with a second positioning post 510. The separator plate 300 is provided with a second positioning hole 350, and the second positioning post 510 is fitted into the second positioning hole 350.

[0072] For example, the battery 210 includes a top cover 212, terminals 211 are disposed on the top cover 212, and the top cover 212 is connected to the positioning member 500.

[0073] The positioning component 500 enables the positioning and installation of the separator 300 and the battery pack 200, preventing misinstallation and improving the positioning accuracy between the busbar 400 and the terminal posts 211 of the battery 210. This reduces welding errors and lowers product yield caused by misalignment. Furthermore, the positioning component 500 connects to the terminal posts 211 of two adjacent batteries 210, increasing the connection strength between the positioning component 500 and the battery pack 200 and ensuring stable relative positions between them.

[0074] Furthermore, such as Figure 9 and Figure 11 As shown, the positioning member 500 has two clearance notches 520 on its two side walls along the first direction X, and two adjacent pole posts 211 are located within the two clearance notches 520 respectively. By setting the clearance notches 520, interference between the positioning member 500 and the pole posts 211 can be avoided, and the area of ​​the remaining area of ​​the positioning member 500 can be larger to increase the connection area between the positioning member 500 and the battery pack 200, thereby further improving the connection strength between the positioning member 500 and the battery pack 200.

[0075] like Figure 9 and Figure 11As shown, the second positioning post 510 is staggered with the clearance notch 520. Since the pole post 211 is located within the clearance notch 520, by staggering the second positioning post 510 with the clearance notch 520, the second positioning post 510 and the pole post 211 can be misaligned. Since the busbar 400 is connected to the pole post 211, the probability of interference between the second positioning post 510 and the busbar 400 can be reduced.

[0076] Furthermore, the second positioning post 510 is located between two adjacent batteries 210. The second positioning post 510 can be the center of the positioning member 500 in the width direction, so that the positioning member 500 is subjected to more uniform force.

[0077] Secondly, this utility model provides an electrical device, which includes the aforementioned battery pack 1. The electrical device can be a vehicle or an energy storage device, etc.

[0078] The electrical device of this utility model, through the aforementioned battery pack 1, can solve the problem of the isolation plate 300 being damaged by being stretched due to battery expansion.

[0079] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack, characterized in that, include: The housing (100) is provided with a receiving cavity (101); A cover plate (102) is connected to the housing (100) and covers the receiving cavity (101); A battery pack (200) is disposed in the receiving cavity (101). The battery pack (200) includes a plurality of batteries (210). Each battery (210) is provided with a terminal post (211) facing the cover plate (102). An isolation plate (300) is connected to the side of the battery (210) where the terminal post (211) is located. The isolation plate (300) is located between the battery pack (200) and the cover plate (102). The terminal post (211) passes through the isolation plate (300). The isolation plate (300) is provided with a plurality of first positioning posts (310), and the first positioning posts (310) protrude toward the cover plate (102). Multiple busbars (400) are respectively installed on the side of the isolation plate (300) facing the cover plate (102). Each busbar (400) is connected to the terminal post (211) of two adjacent batteries (210). The busbar (400) includes a first connecting part (420), a bending part (410) and a second connecting part (430) connected in sequence. The first connecting part (420) and the second connecting part (430) are connected to the terminal post (211) passing through the isolation plate (300). The bending part (410) is recessed in a direction away from the cover plate (102). The bending part (410) is provided with a through first positioning hole (411). The first positioning post (310) passes through the first positioning hole (411).

2. The battery pack according to claim 1, characterized in that, The isolation plate (300) has a groove (320) on the side facing the bending part (410). The groove (320) is recessed in a direction away from the cover plate (102). The first positioning post (310) is disposed on the bottom wall of the groove (320). The bending part (410) is located in the groove (320).

3. The battery pack according to claim 1, characterized in that, The isolation plate (300) is provided with a groove (340) near the first positioning post (310). The groove (340) is recessed in a direction away from the cover plate (102). The first positioning post (310) is connected to the side of the groove (340) facing the cover plate (102).

4. The battery pack according to claim 3, characterized in that, The first positioning post (310) has a cavity (312) with an opening (313), the opening (313) being located on the side of the sink (340) away from the manifold (400).

5. The battery pack according to claim 1, characterized in that, The battery pack has a first direction (X), and the separator (300) includes a mounting portion (360) and a separator portion (370). There are multiple mounting portions (360) and separator portions (370). The multiple mounting portions (360) are spaced apart along the first direction (X). The separator portion (370) is connected to two adjacent mounting portions (360) along the first direction (X). The first positioning post (310) is disposed on the mounting portion (360).

6. The battery pack according to any one of claims 1-5, characterized in that, The battery pack has a first direction (X), and the battery pack further includes a positioning member (500) disposed on the side of the battery (210) where the terminal post (211) is provided. The positioning member (500) is located between the separator plate (300) and the battery (210). The positioning member (500) is connected to the terminal posts (211) of two adjacent batteries (210) along the first direction (X), and the positioning member (500) is connected to the separator plate (300).

7. The battery pack according to claim 6, characterized in that, The positioning member (500) has a second positioning post (510) on the side facing the isolation plate (300), and the isolation plate (300) has a second positioning hole (350) through it, and the second positioning post (510) passes through the second positioning hole (350).

8. The battery pack according to claim 6, characterized in that, The positioning member (500) has clearance notches (520) on two side walls along the first direction (X), and two adjacent pole posts (211) are located in the two clearance notches (520) respectively.

9. The battery pack according to claim 1, characterized in that, The end of the first positioning post (310) facing away from the battery (210) is a blocking part, and the diameter of the blocking part is larger than the diameter of the first positioning hole (411).

10. An electrical device, characterized in that, Includes the battery pack (1) according to any one of claims 1-9.

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