Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment. The battery pack comprises a shell, a partition plate assembly and a plurality of single batteries, wherein the shell is internally provided with a battery compartment for accommodating the single batteries; the partition plate assembly is arranged in the battery compartment and divides the battery compartment into a plurality of cavities which are isolated from one another; and one single battery is arranged in one cavity. The partition plate assemblies achieve isolation between the single batteries, when one single battery is overheated and breaks out of fire, other surrounding single batteries cannot be affected, and the safety and reliability of the whole bag are greatly improved. In addition, the partition plate assembly plays a supporting role at the same time, the number of battery pack materials is reduced, operation is convenient, and the assembling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery pack and electric equipment. BACKGROUND

[0002] New energy has welcomed rapid development, and products such as electric bicycles, scooters and motorcycles have been widely used. Battery packs mainly using lithium battery modules are favored due to their high energy density and energy conversion efficiency.

[0003] The lithium battery module in the battery pack is composed of multiple single batteries in series and parallel connection. The battery will release heat during charging and discharging, and thermal runaway is likely to occur. After a single battery appears thermal runaway, it will spread to other single batteries in a short time, triggering a chain thermal runaway reaction, leading to serious safety accidents such as smoke, fire and explosion of the battery pack. SUMMARY

[0004] The utility model embodiment provides a kind of battery pack and electric equipment, to solve the problem of one single battery thermal runaway affecting surrounding single battery in the related art.

[0005] To solve the above technical problems, the utility model is implemented as follows:

[0006] In a first aspect, the utility model embodiment provides a kind of battery pack, comprising: shell, baffle assembly and multiple single batteries;Wherein,

[0007] The shell has a battery compartment for accommodating the single battery;

[0008] The baffle assembly is arranged in the battery compartment, and the battery compartment is divided into multiple cavities isolated from each other;

[0009] One single battery is arranged in one cavity.

[0010] Optionally, the baffle assembly includes intersecting first and second baffles, and the first and second baffles enclose the cavities. The first baffle has a first notch at a position opposite the second baffle, and the second baffle has a second notch at a corresponding position. The first and second notches are engaged to connect the first and second baffles.

[0011] Optionally, the baffle assembly includes a first heat insulation layer, a support layer and a second heat insulation layer arranged in sequence.

[0012] Optionally, there is a gap between the baffle assembly and the single battery, and the gap is filled with potting glue.

[0013] Optionally, further comprising a support plate and a circuit board, the single battery has a first end surface and a second end surface facing away from each other, and a first surface connecting the first end surface and the second end surface, the first surface of a plurality of the single batteries outside the separator assembly is partially exposed;

[0014] The support plate is arranged on the separator assembly and covers the first surface of the exposed single battery;

[0015] The circuit board is arranged on the side of the support plate away from the single battery, and the circuit board is electrically connected with the single battery.

[0016] Optionally, the support plate has a plurality of alternately arranged arch-shaped portions and connecting portions; wherein,

[0017] The position of one of the arch-shaped portions corresponds to one of the single batteries, the shape of the arch-shaped portion matches the first surface of the single battery, and a plurality of the arch-shaped portions are sequentially arranged on the first surface of a plurality of the exposed single batteries;

[0018] The connecting portion is arranged between the arch-shaped portions, the connecting portion is connected to the separator assembly, and the circuit board is arranged on the side of the connecting portion away from the separator assembly.

[0019] Optionally, the side of the connecting portion away from the separator assembly is provided with at least one clamping piece, and the clamping piece is used for fixing the circuit board.

[0020] Optionally, the shell comprises a first shell and a second shell, the first shell and the second shell form the battery compartment, the first shell is provided with a plurality of buckling holes at one end close to the second shell, and the second shell is provided with a plurality of buckles at the corresponding position, the buckles are buckled into the buckling holes to realize the buckling connection of the first shell and the second shell.

[0021] Optionally, one end of the first shell and the second shell in contact is provided with a groove, the second shell is buckled into the groove, and the groove is filled with sealant.

[0022] In a second aspect, the utility model also discloses a kind of electric equipment, comprising the battery pack of any described in the above first aspect.

[0023] The utility model provides a kind of battery pack and electrical equipment, including shell, baffle assembly and multiple single batteries;Wherein, shell has the battery compartment for accommodating the single battery in;The baffle assembly is arranged in the battery compartment, the battery compartment is divided into multiple cavities isolated from each other;One single battery is arranged in one cavity.Baffle assembly realizes the insulation between single battery, when one of single battery overheats and fires, it will not affect the surrounding other single battery, greatly improve the safety reliability of whole package.In addition, baffle assembly plays the supporting role simultaneously, reduce the material quantity of battery pack, it is convenient to operate, improve assembly efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It shows the explosion diagram of the battery pack provided by the utility model embodiment;

[0025] Figure 2 It shows the explosion diagram of the battery module in the battery pack provided by the utility model embodiment;

[0026] Figure 3 It shows the schematic diagram of the baffle assembly provided by the utility model embodiment;

[0027] Figure 4 It shows the schematic diagram of the first baffle and the second baffle provided by the utility model embodiment;

[0028] Figure 5 It shows the schematic diagram of the layered structure of the baffle assembly provided by the utility model embodiment;

[0029] Figure 6 It shows the partial enlarged view of the assembly of single battery and baffle assembly provided by the utility model embodiment;

[0030] Figure 7 It shows the schematic diagram of the supporting plate provided by the utility model embodiment;

[0031] Figure 8 It shows the schematic diagram of the first shell provided by the utility model embodiment;

[0032] Figure 9 It shows Figure 8 The partial enlarged view of the middle circle shown part;

[0033] Figure 10 It shows the schematic diagram of the second shell provided by the utility model embodiment;

[0034] Figure 11 It shows the cross-sectional view of the battery pack provided by the utility model embodiment;

[0035] Figure 12 It shows Figure 11A partial enlarged view of the middle circle showing part A is shown;

[0036] Figure 13 A partial enlarged view of the middle circle showing part B is shown. Figure 11 A partial enlarged view of the middle circle showing part B is shown.

[0037] Figure 14 A schematic diagram of the overall structure assembly of the battery pack is shown.

[0038] Reference signs:

[0039] 100: battery pack; 10: shell; 11: first shell; 111: buckling hole; 112: groove; 113: mounting hole; 12: second shell; 121: buckle; 20: partition assembly; 21: first partition; 211: first notch; 22: second partition; 221: second notch; 23: first heat insulation layer; 24: support layer; 25: second heat insulation layer; 30: single battery; 31: first end face; 32: second end face; 33: first surface; 40: potting adhesive; 50: support plate; 51: arched part; 52: connecting part; 53: clamping part; 54: handle; 60: circuit board; 70: busbar; 80: wire harness. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0041] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0042] As Figure 1 and Figure 2 shown, the embodiments of the present application disclose a battery pack 100, comprising a shell 10, a partition assembly 20 and a plurality of single batteries 30; wherein the shell 10 has a battery compartment for accommodating the single batteries 30; the partition assembly 20 is arranged in the battery compartment, and divides the battery compartment into a plurality of cavities isolated from each other; one single battery 30 is arranged in one cavity.

[0043] The partition assembly 20 in the embodiment can be a one-piece structure or can be spliced by multiple components. The partition assembly 20 divides the space in the shell 10 into multiple cavities isolated from each other. The size of the partition assembly 20 can be adjusted according to the size of the single battery 30 actually used, so that one cavity can accommodate exactly one single battery 30. Multiple single batteries 30 are placed in multiple cavities on the partition assembly 20 to form a battery cluster. The partition assembly 20 filled with single batteries 30 is placed in the shell 10. The partition assembly 20 supports the single batteries 30 inside and prevents the single batteries 30 inside from moving and colliding when the battery pack 100 moves. The partition assembly 20 has good heat insulation and flame retardant properties, can insulate heat transfer between adjacent single batteries 30, and limits the heat released by each single battery 30 to the cavity where the single battery 30 is located. In the embodiment, only one single battery 30 is arranged in one cavity. In actual use, multiple single batteries 30 can also be arranged in one cavity as needed. Multiple single batteries 30 constituting a battery cluster can be divided into multiple battery groups and arranged in cavities of the partition assembly 20 to achieve isolation between battery groups in each cavity.

[0044] The battery cluster on the market usually adopts a double support structure. Supports are arranged at both ends of the single battery 30. The supports are fastened by screws to fix multiple single batteries 30 on the supports to form a battery cluster. The single batteries 30 are connected in series and parallel through the busbar 70. After the BMS system is added, the whole is fixed in the shell 10 to form the battery pack 100. Finally, the battery pack 100 is installed in the vehicle cabin. The battery module thus formed has a complex structure and needs to be matched at multiple places, which affects the stability of the battery module and increases the risk of failure of the battery pack 100. Moreover, the existing support structure does not involve the thermal runaway field of the battery pack 100. The battery releases a large amount of heat during operation. Once the heat exceeds the safety limit, thermal runaway of a single single battery 30 occurs. The support structure occupies a large space in the battery pack 100. If there is no protective measure, the single battery 30 will burn the support when thermal runaway occurs, causing heat spread and leading to thermal runaway of the whole pack, which is prone to cause serious safety accidents such as smoking, fire, and explosion.

[0045] In the present application, the partition assembly 20 is used to replace the support to fix the single battery 30. The partition assembly 20 has multiple cavities isolated from each other. One cavity accommodates one single battery 30. Adjacent single batteries 30 are separated by the heat-insulating partition assembly 20. Thus, heat transfer between the single batteries 30 is insulated, and the thermal runaway of one single battery 30 does not affect the surrounding single batteries 30, solving the problem of thermal runaway of the battery pack 100 and achieving cell-level protection management.

[0046] Furthermore, the installation of the separator assembly 20 is relatively simple, and it does not require the use of screws or other fasteners for further installation and fixation. Compared with the traditional battery pack 100 that uses brackets for fastening, it can reduce the amount of materials, reduce costs, and reduce production line operation time.

[0047] In addition, in some optional embodiments, the partition assembly 20 includes an intersecting first partition 21 and a second partition 22, the first partition 21 and the second partition 22 enclosing a cavity, a first slot 211 is provided on the first partition 21 at a position opposite to the second partition 22, and a second slot 221 is provided on the second partition 22 at a corresponding position, so as to realize the connection between the first partition 21 and the second partition 22.

[0048] like Figure 4 As shown, the separator assembly 20 can be a split structure, composed of multiple first separators 21 and second separators 22 vertically inserted together. The first separators 21 and second separators 22 have the same width to ensure that their edges are flush after insertion. Two first separators 21 arranged horizontally and two second separators 22 arranged vertically enclose a cavity for accommodating a single battery cell 30. The insertion positions of the first separators 21 and second separators 22 are respectively provided with first slots 211 and second slots 221. The lengths of the first slots 211 and second slots 221 are both half the width of the first separators 21 and second separators 22. The first separator 21 is inserted into the second slot 221, and the second separator 22 is inserted into the first slot 211. Multiple first separators 21 and second separators 22 combined in this manner form the separator assembly 20, which contains multiple enclosed cavities, each cavity for placing a single battery cell 30. The partition assembly 20 can also be composed of two or more components to meet the needs of insulation and installation under different usage conditions.

[0049] In some alternative embodiments, the partition assembly 20 includes a first insulation layer 23, a support layer 24, and a second insulation layer 25 disposed sequentially.

[0050] like Figure 5 As shown, both the first separator 21 and the second separator 22 are layered structures, including a first heat insulation layer 23, a support layer 24, and a second heat insulation layer 25. The first heat insulation layer 23 and the second heat insulation layer 25 are located on both sides of the support layer 24, forming the inner wall of the cavity. They are mainly used to insulate the heat released by the individual battery cells 30 inside the cavity. The first heat insulation layer 23 and the second heat insulation layer 25 can be made of the same heat insulation material or different heat insulation materials. The support layer 24 is located between the first heat insulation layer 23 and the second heat insulation layer 25, and has high strength, providing support for the entire structure composed of the separator assembly 20 and the individual battery cells 30.

[0051] In specific applications, the first thermal insulation layer 23 and the second thermal insulation layer 25 can be aerogel, and the support layer 24 can be an epoxy plate. Aerogel is a good thermal insulation material, but it lacks strength, and the epoxy plate has certain thermal insulation effect and also serves as a support to prevent the thermal insulation effect of the baffle assembly 20 from being weakened due to deformation.

[0052] In addition, in some optional embodiments, there is a gap between the baffle assembly 20 and the single battery 30, and the gap is filled with potting glue 40.

[0053] The filling of the potting glue 40 can achieve further fixation of the single battery 30 and improve the overall mechanical reliability. Meanwhile, the potting glue 40 has certain heat conduction and insulation effects, and the potting glue 40 is filled into the gap between the baffle assembly 20 and the single battery 30. In normal use, the potting glue 40 has a heat conduction effect, which transfers the heat generated by the charging and discharging of the single battery 30 to both ends for heat dissipation through the shell 10. When a single battery 30 triggers thermal runaway, the potting glue 40 closely adheres to the single battery 30 and the baffle assembly 20, which can lock the energy in a single cavity, effectively avoiding the influence on the surrounding single batteries 30.

[0054] In specific applications, high-thermal-conductivity potting glue 40 is generally used to fill the gap between the baffle assembly 20 and the single battery 30. The high-thermal-conductivity potting glue 40 is composed of two types of glue, which are in liquid state and have good fluidity when not mixed. After the battery module composed of the baffle assembly 20 and the single battery 30 is placed in the shell 10, the two types of glue are mixed and poured into the shell 10, and then solidified after a period of standing. The solidified potting glue 40 completely fills the gap between the baffle assembly 20, the single battery 30, and the shell 10, and can play the roles of waterproofing, moisture-proofing, dust-proofing, insulation, heat conduction, security, corrosion resistance, temperature resistance, and shock resistance. It can be understood that there is also a gap between the baffle assembly 20 and the shell 10, and when the potting glue 40 is filled, the potting glue 40 also flows into the gap between the baffle assembly 20 and the shell 10, improving the overall mechanical reliability. The solidified potting glue 40 itself has good heat conductivity and heat resistance. When the single battery 30 burns, the temperature can reach 800-1000 degrees Celsius, and the potting glue 40 still has reliable structure and support ability at this temperature.

[0055] In addition, in some optional embodiments, a support plate 50 and a circuit board 60 are further included. The single battery 30 has a first end surface 31 and a second end surface 32 facing away from each other, and a first surface 33 connecting the first end surface 31 and the second end surface 32. The first surfaces 33 of a plurality of single batteries 30 located outside the baffle assembly 20 are partially exposed. The support plate 50 is arranged on the baffle assembly 20 and covers the exposed first surfaces 33 of the single batteries 30. The circuit board 60 is arranged on the side of the support plate 50 away from the single batteries 30, and the circuit board 60 is electrically connected to the single batteries 30.

[0056] As shown in Figure 2 The two ends of the single battery 30 are positive and negative, respectively, and busbars 70 are arranged at the positive and negative ends of the single battery 30. The single batteries 30 are connected in series and parallel through the busbars 70, and the busbars 70 are electrically connected to the circuit board 60. In order to facilitate the connection of the circuit board 60 to the two groups of busbars 70 at the two ends of the single battery 30, the circuit board 60 is arranged between the first end surface 31 and the second end surface 32 of the single battery 30, and an insulating support plate 50 is arranged between the circuit board 60 and the single battery 30. The support plate 50 is connected to the separator assembly 20, and the outer side of the separator assembly 20 is open. Therefore, the part of the single battery 30 located outside the separator assembly 20 is exposed. The side of the support plate 50 connected to the separator assembly 20 covers the surface of the exposed single battery 30, and the other side is provided with the circuit board 60. The support plate 50 insulates the single battery 30 and the circuit board 60, and supports and limits the circuit board 60.

[0057] In addition, in some optional embodiments, the support plate 50 has a plurality of alternately arranged arched portions 51 and connecting portions 52. One arched portion 51 corresponds to one single battery 30, and the shape of the arched portion 51 matches the first surface 33 of the single battery 30. The plurality of arched portions 51 are arranged in sequence on the first surfaces 33 of the plurality of exposed single batteries 30. The connecting portion 52 is arranged between the arched portions 51, and the connecting portion 52 is connected to the separator assembly 20. The circuit board 60 is arranged on the side of the connecting portion 52 away from the separator assembly 20.

[0058] As shown in Figure 7 The support plate 50 has a shape that fits the plurality of single batteries 30 it covers. Each single battery 30 is covered with an arched portion 51 that matches the shape of the single battery 30. The two adjacent single batteries 30 are separated by the separator assembly 20, and the connecting portion 52 that matches the shape of the separator assembly 20 is arranged at the corresponding position of the separator assembly 20. The single batteries 30 and the separator assembly 20 are arranged alternately, so the arched portions 51 and the connecting portions 52 are also arranged alternately at the corresponding positions. The support plate 50 closely fits the surfaces of the single batteries 30 and the separator assembly 20 to achieve better fixing effect. The ends of the plurality of arched portions 51 and the connecting portions 52 away from the single batteries 30 are flush, forming a flat surface for placing the circuit board 60.

[0059] In addition, in some optional embodiments, the connecting portion 52 away from the separator assembly 20 is provided with at least one clamping member 53 for fixing the circuit board 60.

[0060] The connecting part 52 is an elongated groove along the surface of the separator assembly 20. At both ends of the groove, on the side facing away from the separator assembly 20, fasteners 53 are provided to secure the circuit board 60 placed on the connecting part 52 to the surface, thus fixing and limiting the position of the circuit board 60. For ease of installation, handles 54 are designed on both the left and right sides of the support plate 50. After the battery module is welded in the fixture, the entire module can be lifted out through the handles 54 and placed into the housing 10, where it is then potted and sealed.

[0061] In addition, in some optional embodiments, the housing 10 includes a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 enclose each other to form a battery compartment. The first housing 11 is provided with a plurality of fastening holes 111 at one end near the second housing 12. The second housing 12 is provided with a plurality of buckles 121 at corresponding positions. The buckles 121 are engaged with the fastening holes 111 to achieve a fastening connection between the first housing 11 and the second housing 12.

[0062] like Figures 8-14 As shown, the housing 10 consists of a first housing 11 and a second housing 12. The first housing 11 is used to house the battery module, and the second housing 12 is fastened to the first housing 11 to seal the internal battery module. The first housing 11 is an open container with one side open. A fastening hole 111 is provided on the side wall of the first housing 11 near the opening. An L-shaped buckle 121 is provided at a corresponding position on the second housing 12. The bent part of the L-shaped buckle 121 passes through the fastening hole 111 to achieve the fastening connection between the first housing 11 and the second housing 12.

[0063] In specific applications, the battery pack 100 also includes a wiring harness 80 for connecting to external electrical equipment. One end of the wiring harness 80 is electrically connected to the circuit board 60, and the other end is connected to the electrical equipment. A mounting hole 113 is provided on the side of the first housing 11 for the wiring harness 80 to pass through. The gap between the wiring harness 80 and the mounting hole 113 is filled with adhesive to fix the wiring harness 80 and to provide a seal, preventing liquids and gases from the environment from entering the battery pack 100 through the mounting hole 113, thus improving the overall protective performance of the battery pack 100.

[0064] In some alternative embodiments, the end of the first housing 11 that contacts the second housing 12 is provided with a groove 112, the second housing 12 is inserted into the groove 112, and the groove 112 is filled with sealant.

[0065] The side wall of the first housing 11 is provided with a groove 112 around the side wall of the first housing 11 at the position where it contacts the second housing 12. The edge of the second housing 12 protrudes in the direction of connection with the first housing 11, and the protruding part is inserted into the groove 112. The gap between the groove 112 and the protruding part is filled with sealant to achieve full sealing.

[0066] The following will take the 13-string 4-parallel battery pack 100 as an example to illustrate the specific structure and assembly mode of the battery pack 100.

[0067] Reference Figure 1 And Figure 2 The battery pack 100 in the embodiment is of a 13-string 4-parallel structure, the series and parallel connection of the single batteries 30 is realized through the busbars 70 on both sides of the partition assembly 20, the 4 single batteries 30 arranged in the vertical direction are connected in parallel to form a parallel battery pack, and the 13 parallel battery packs arranged in the horizontal direction are connected in series. The battery pack 100 is connected with the power supply or the electric equipment through the busbars 70, the circuit board 60 and the wire harness 80 to realize the charging and discharging of the battery pack 100.

[0068] The assembly process of the battery pack 100 is as follows: after the partition assembly 20 is assembled, the single batteries 30 are filled into the cavities of the partition assembly 20, the support plates 50 are installed above the partition assembly 20 and the single batteries 30, the support plates 50 are attached to the surfaces, the circuit board 60 is above the support plates 50, the welding of the busbars 70 on both sides, the single batteries 30 and the circuit board 60 is completed in the jig, the whole module is taken out from the jig through the handles 54 on both sides of the support plates 50 after the spot welding of the module is completed, and then the module is placed into the first shell 11. The wire harness 80 is stretched out from the mounting hole 113 in the side wall of the first shell 11, and the sealant is applied around the wire harness 80. After the completion, the battery module in the first shell 11 is treated by glue pouring, and after the glue solidifies, a circle of sealant is applied at the top groove 112 of the first shell 11. The first shell 11 and the second shell 12 are assembled, the buckle 121 designed on the second shell 12 can be buckled with the buckling hole 111 in the side wall of the first shell 11, and the whole package assembly is completed.

[0069] The utility model embodiment provides a kind of battery pack, including shell, partition assembly and multiple single batteries;Wherein, the battery compartment for accommodating single battery is provided in shell;Partition assembly is arranged in battery compartment, and battery compartment is divided into multiple cavities isolated from each other;One single battery is arranged in one cavity.Partition assembly realizes the insulation between single battery, when one of single battery overheats and fires, it will not affect other single batteries around, greatly improve the safety reliability of whole package.In addition, partition assembly plays the role of support simultaneously, battery pack material quantity reduces, it is easy to operate, improves assembly efficiency.

[0070] On the other hand, the utility model embodiment further discloses a kind of electric equipment, including battery pack in any of the above embodiments.

[0071] It should be explained that each embodiment in the present specification adopts progressive mode to describe, and each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment are referred to each other.

[0072] Although the optional embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to cover all the alternative embodiments and all the changes and modifications falling within the scope of the present application.

[0073] Finally, it should be noted that in this document, the terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply that there is any such actual relationship or order between the entities. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such article or terminal device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the article or terminal device including the element.

[0074] The above describes the technical solutions provided by the present application in detail, and the principles and implementation modes of the present application are described by applying specific examples. Meanwhile, for those skilled in the art, the principles and implementation modes of the present application will have changes in specific implementation modes and application scope. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A battery pack (100), characterized in that, The application relates to a battery pack, which comprises a shell (10), a partition assembly (20) and a plurality of single batteries (30); wherein the shell (10) is internally provided with a battery compartment for accommodating the single batteries (30); the partition assembly (20) is arranged in the battery compartment and divides the battery compartment into a plurality of cavities which are isolated from each other; one single battery (30) is arranged in one cavity. The partition assembly (20) comprises intersecting first partitions (21) and second partitions (22), the first partitions (21) and the second partitions (22) enclose the cavities, the first partitions (21) are provided with first notches (211) at positions opposite to the second partitions (22), the second partitions (22) are provided with second notches (221) at corresponding positions, the first notches (211) and the second notches (221) are engaged to realize the connection of the first partitions (21) and the second partitions (22). The partition assembly (20) comprises a first heat insulation layer (23), a support layer (24) and a second heat insulation layer (25) arranged in sequence. The partition assembly (20) and the single batteries (30) are provided with gaps, and the gaps are filled with potting glue (40). The application further comprises a support plate (50) and a circuit board (60), the single batteries (30) have first end faces (31) and second end faces (32) which are opposite to each other, and first surfaces (33) connecting the first end faces (31) and the second end faces (32), and the first surfaces (33) of the single batteries (30) located outside the partition assembly (20) are partially exposed.

2. The battery pack (100) of claim 1, wherein, The support plate (50) is arranged on the partition assembly (20) and covers the first surfaces (33) of the single batteries (30) which are exposed.

3. The battery pack (100) of claim 1, wherein, The circuit board (60) is arranged on a side of the support plate (50) which is away from the single batteries (30), and the circuit board (60) is electrically connected with the single batteries (30).

4. The battery pack (100) of claim 1, wherein, The support plate (50) has a plurality of alternately arranged arched portions (51) and connecting portions (52); wherein the arched portions (51) are arranged at positions corresponding to the single batteries (30), the shapes of the arched portions (51) are matched with the first surfaces (33) of the single batteries (30), and the arched portions (51) sequentially cover the first surfaces (33) of the single batteries (30) which are exposed; the connecting portions (52) are arranged between the arched portions (51) and are connected to the partition assembly (20), and the circuit board (60) is arranged on a side of the connecting portions (52) which is away from the partition assembly (20).

5. The battery pack (100) of claim 1, wherein, At least one clamping piece (53) is arranged on a side of the connecting portion (52) which is away from the partition assembly (20), and the clamping piece (53) is used for fixing the circuit board (60). ​ ​ 6. The battery pack (100) of claim 5, wherein, ​ ​ ​ 7. The battery pack (100) of claim 6, wherein, ​ 8. The battery pack (100) of claim 1, wherein, The shell (10) comprises a first shell (11) and a second shell (12), the first shell (11) and the second shell (12) enclose the battery compartment, the first shell (11) is provided with a plurality of buckling holes (111) at one end close to the second shell (12), and the second shell (12) is provided with a plurality of buckles (121) at the corresponding position, the buckles (121) are buckled into the buckling holes (111), so as to realize the buckling connection of the first shell (11) and the second shell (12).

9. The battery pack (100) of claim 1, wherein, The first shell (11) is provided with a groove (112) at one end in contact with the second shell (12), the second shell (12) is buckled into the groove (112), and the groove (112) is filled with sealant.

10. An electric device, characterized by The battery pack (100) comprises the battery pack (100) according to any one of claims 1-9.

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