Battery pack and electric equipment

Abstract

The embodiment of the utility model discloses a battery pack and electric equipment, and belongs to the technical field of batteries, and the battery pack comprises a plurality of batteries arranged along a first direction; the batteries are arranged on one side of the mounting plate in the second direction, a plurality of protruding parts are arranged on the mounting plate towards the batteries in a protruding mode, the protruding parts are arranged at intervals in the first direction, and the protruding parts are arranged between the two batteries adjacently arranged in the first direction in a spaced mode; in the second direction, the size of the battery is H1mm, the size of the protruding part is H2mm, and the formula that H2 / H1 is larger than or equal to 0.05 and smaller than or equal to 0.2 is met. Therefore, the two batteries which are adjacently arranged along the first direction are separated by the lug bosses, and a certain deformation space is reserved for the deformation of the batteries, so that the technical problem that the safety of the battery pack is influenced due to more serious accidents caused by extrusion of the cooling plate when the batteries are deformed in the existing battery pack is solved. In addition, the interval of the lug bosses also provides a heat dissipation space for the two adjacent batteries, so that the safety of the battery pack is improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery pack and electrical equipment. Background Art

[0002] The battery pack CTP (Cell to Pack) technology is a technology that directly assembles batteries into battery packs. It improves the space utilization of the battery pack by reducing or eliminating the module structure. A cooling plate needs to be placed between adjacent batteries. However, when the battery is deformed, it will squeeze the cooling plate and cause more serious accidents, affecting the safety of the battery pack. Utility Model Content

[0003] Purpose of the utility model: An embodiment of the present application provides a battery pack, aiming to overcome the technical problem in the existing battery pack that when the battery is deformed, the cooling plate will be squeezed to cause more serious accidents and affect the safety of the battery pack; another purpose of the embodiment of the present application is to provide an electrical device.

[0004] Technical solution: A battery pack according to an embodiment of the present application, wherein the battery pack has a first direction and a second direction intersecting each other, and the battery pack comprises:

[0005] A plurality of batteries arranged along the first direction;

[0006] A mounting plate, wherein the battery is arranged on one side of the mounting plate along the second direction, and the mounting plate is provided with a plurality of protrusions protruding toward the battery, wherein the plurality of protrusions are arranged at intervals along the first direction, and the protrusions are spaced between two batteries adjacently arranged along the first direction;

[0007] Along the second direction, the battery has a dimension H 1 mm, the raised portion has a dimension H 2 mm, the battery pack meets the following requirements: 0.05≤H 2 / H 1 ≤0.2.

[0008] In some embodiments, the plurality of protrusions are arranged in a stepped manner along the first direction.

[0009] In some embodiments,

[0010] The sizes of the plurality of protrusions in the second direction are successively reduced along the first direction; or,

[0011] The sizes of the plurality of protrusions in the second direction are first reduced and then increased along the first direction.

[0012] In some embodiments, among the plurality of protrusions, the maximum dimension in the second direction is H max, the minimum dimension in the second direction is H min , the battery pack satisfies: 1<H max / H min ≤2.

[0013] In some embodiments, the mounting plate is made of an elastic material so that the protrusion is in non-rigid contact with the battery.

[0014] In some embodiments, the battery is a square battery, the surface of the battery with the largest area is the contact surface, adjacent batteries are arranged relative to each other through their respective contact surfaces, and the protrusion is located between the relative contact surfaces; an anti-wear coating is provided on the side of the protrusion facing the contact surface.

[0015] In some embodiments, the mounting plate has a plate surface on a side facing the battery, and the plate surface is raised toward the side of the battery to form a plurality of raised portions.

[0016] In some embodiments, the mounting plate has a plate surface on a side facing the battery, and the plate surface is concave on the side facing the battery to form a plurality of grooves, with the protrusion formed between two adjacent grooves.

[0017] In some embodiments, the junction between the battery and the panel surface is a first arc-shaped corner, and the junction between the protrusion and the panel surface is a second arc-shaped corner.

[0018] Correspondingly, an electrical device provided in an embodiment of the present application includes the battery pack described in any of the above embodiments.

[0019] Beneficial effect: Compared with the prior art, the battery pack of the embodiment of the present application has a first direction and a second direction intersecting each other, and the battery pack comprises: a plurality of batteries arranged along the first direction; a mounting plate, along the second direction, the battery is arranged on one side of the mounting plate, the mounting plate is protruded toward the battery and is provided with a plurality of protrusions, the plurality of protrusions are arranged at intervals along the first direction, and the protrusions are spaced between two batteries arranged adjacently along the first direction; along the second direction, the battery has a size H 1 mm, the raised part has dimension H 2 mm, battery pack meets: 0.05≤H 2 / H 1 ≤0.2. In this way, two batteries arranged adjacent to each other in the first direction are separated by the raised portion, which reserves a certain deformation space for the deformation of the battery, thus overcoming the technical problem in the existing battery pack that when the battery is deformed, the cooling plate will be squeezed to cause a more serious accident and affect the safety of the battery pack. In addition, the interval of the raised portion also provides heat dissipation space for the two adjacent batteries, thereby improving the safety of the battery pack.

[0020] Compared with the prior art, the electrical equipment of the embodiment of the present application may include all the technical features and beneficial effects of the above-mentioned battery pack, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the exploded structure of a battery pack provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the three-dimensional structure of a mounting plate in a battery pack provided in an embodiment of the present application;

[0024] Figure 3 A top view of a battery pack provided in an embodiment of the present application;

[0025] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0026] Figure 5 for Figure 4 A partial enlarged schematic diagram of the middle B area;

[0027] Figure 6 A schematic diagram of the three-dimensional structure of a battery in a battery pack provided in an embodiment of the present application;

[0028] Figure 7 A schematic diagram of a partial structure of a protrusion in a battery pack provided in an embodiment of the present application;

[0029] Figure 8 A schematic diagram of the three-dimensional structure of a box in a battery pack provided in an embodiment of the present application;

[0030] Fig. 9 A top view of a battery pack provided in an embodiment of the present application without batteries installed;

[0031] Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure of the CC;

[0032] Fig.11 for Fig.10 A partial enlarged schematic diagram of the D area in the middle.

[0033] Figure markings: 100-battery; 110-contact surface; 120-explosion-proof valve; 130-first corner; 200-mounting plate; 210-raised portion; 211-wear-resistant coating; 212-second corner; 220-first exhaust hole; 230-second limiting portion; 240-first side plate; 241-second exhaust hole; 250-plate surface; 260-groove; 270-support member; 300-box; 310-second side plate; 311-first limiting portion; 320-accommodating area; 330-third side plate; 340-second exhaust area; 400-bottom plate; 410-first exhaust area; X-first direction; Y-second direction. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0035] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined.

[0036] The applicant noted that in existing battery packs, cooling plates need to be placed between adjacent batteries. However, when the batteries are deformed, the cooling plates will be squeezed, causing more serious accidents and affecting the safety of the battery pack.

[0037] In view of this, an embodiment of the present application provides a battery pack, which reserves space for battery deformation.

[0038] Please also read Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , Figure 1 A schematic diagram of the exploded structure of a battery pack provided in an embodiment of the present application is illustrated; Figure 2 A schematic diagram illustrating the three-dimensional structure of the mounting plate in the exploded structure of the battery pack provided in an embodiment of the present application observed from another angle; Figure 3A top view of a mounting plate in a battery pack provided in an embodiment of the present application is illustrated; Figure 4 Indicated Figure 3 Schematic diagram of the cross-sectional structure of AA; Figure 5 Indicated Figure 4 A partial enlarged schematic diagram of area B in the middle; in the embodiment of the present application, the battery pack has a first direction X and a second direction Y that intersect, and the battery pack includes a plurality of batteries 100 and a mounting plate 200.

[0039] In some embodiments, a plurality of batteries 100 are arranged along a first direction X; along a second direction Y, the battery 100 is disposed on one side of a mounting plate 200, and the mounting plate 200 is provided with a plurality of protrusions 210 protruding toward the battery 100, and the plurality of protrusions 210 are arranged at intervals along the first direction X, and the protrusions 210 are spaced between two batteries 100 disposed adjacently along the first direction X; along the second direction Y, the battery 100 has a size H 1 mm, the raised portion 210 has a dimension H 2 mm, battery pack meets: 0.05≤H 2 / H 1 ≤0.2. It should be noted that H 1 With H 2 The above ratio exists between the two, and the ratio is in the range of 0.05 to 0.2, that is, the ratio can be any value among 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, or a range between any two values. The larger the ratio, the higher the maximum temperature in the battery pack, and the smaller the ratio, the lower the maximum temperature in the battery pack.

[0040] A square battery with a width of 148 mm, a height of 91 mm, and a thickness of 36.9 mm is used as a standard battery for testing. The standard battery is assembled into a battery pack provided with the above-mentioned mounting plate 200 for vibration test and maximum temperature test in the battery pack during continuous operation for 3 hours. The vibration test is carried out according to the 8.2.1 test standard in GB38031-2020 Safety requirements for power batteries for electric vehicles. The maximum temperature test can be directly read through the feedback data of the BMS.

[0041] Test examples 1 to 10 are as follows:

[0042]

[0043]

[0044] From the above test examples 1 to 10, it can be seen that according to the 8.2.1 test standard of the national standard GB38031-2020 Safety requirements for power batteries for electric vehicles, the vibration test is carried out when 0.05≤H 2 / H 1 ≤0.2, the maximum temperature inside the battery pack does not exceed 50 degrees Celsius after continuous operation for 3 hours, and can pass the vibration test in the 8.2.1 test standard of GB 38031-2020 Safety requirements for power batteries for electric vehicles.

[0045] It should be noted that the two batteries 100 arranged adjacent to each other along the first direction are separated by the raised portion 210, which reserves a certain deformation space for the deformation of the battery 100, thereby overcoming the technical problem in the existing battery pack that when the battery 100 is deformed, the cooling plate will be squeezed to cause more serious accidents, thereby affecting the safety of the battery pack. At the same time, the interval between the raised portions 210 also provides heat dissipation space for the two adjacent batteries 100, thereby improving the safety of the battery pack. At the same time, the provision of the raised portion 210 can also prevent the two adjacent batteries 100 from colliding with each other, thereby reducing the possibility of damage to the battery 100. In addition, the provision of the mounting plate 200 and the raised portion 210 also enables the battery 100 to maintain the stability of the relative position.

[0046] In some embodiments, a plurality of protrusions 210 are arranged in a step-like manner along the first direction X. Specifically, by arranging the protrusions 210 in a step-like manner along the first direction X, the surface area of ​​the protrusions 210 can be increased, and the heat conduction performance of the protrusions 210 can be improved; at the same time, arranging the protrusions 210 in a step-like manner along the first direction X can also increase the supporting points between the protrusions 210 and the battery 100, thereby increasing the stability of the battery 100 and improving the stability and reliability of the battery pack; in addition, arranging the protrusions 210 in a step-like manner along the first direction X can also reduce pressure concentration and increase the service life of the battery pack.

[0047] In some embodiments, the size of the plurality of protrusions 210 in the second direction Y is sequentially reduced along the first direction X; or, the size of the plurality of protrusions 210 in the second direction Y is first reduced and then increased along the first direction X. Specifically, by adjusting the size of the protrusions 210, the heat conduction and heat dissipation efficiency of the battery 100 can be improved. A larger protrusion 210 can increase the contact area with the battery 100, promote heat conduction and heat dissipation, and a smaller protrusion 210 can increase the deformation space reserved for the deformation of the battery 100, while increasing the heat dissipation space. At the same time, the change in the size of the protrusion 210 also reduces the possibility of local pressure concentration, thereby reducing the stress difference between the battery 100 and the mounting plate 200, and improving the service life and safety of the battery 100.

[0048] In some embodiments, among the plurality of protrusions 210, the maximum dimension in the second direction Y is Hmax , the minimum dimension in the second direction Y is H min , the battery pack meets: 1<H max / H min ≤2. It should be noted that H max With H min The above ratio exists between , and the ratio is in the range of 1 to 2, that is, the ratio can be any value among 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, or a range between any two values. It should be noted that when setting H max With H min The above ratio can optimize the space utilization of the battery pack to maximize the use of available space without occupying too much of the size of the battery pack in the second direction Y. While ensuring that sufficient deformation space is reserved, the heat dissipation effect of the battery 100 is guaranteed, thereby realizing the rational use of the internal space of the battery pack.

[0049] In some embodiments, the mounting plate 200 is made of an elastic material so that the protrusion 210 is in non-rigid contact with the battery 100. Specifically, the elastic material can reduce the vibration and impact between the battery 100 and the mounting plate 200, and the non-rigid contact can make the protrusion 210 better adapt to the expansion and contraction caused by temperature changes, so as to reduce the stress concentration and deformation of the battery 100 at different operating temperatures, and improve the stability and life of the battery 100. Please refer to Figure 6 and Figure 7 , Figure 6 A schematic diagram of the three-dimensional structure of a battery in a battery pack provided in an embodiment of the present application is illustrated; Figure 7 A schematic diagram of the local structure of the raised portion in the battery pack provided in an embodiment of the present application is illustrated; specifically, in some embodiments, the battery 100 is a square battery, the surface of the battery 100 with the largest area is the contact surface 110, adjacent batteries 100 are arranged relative to each other through their respective contact surfaces 110, and the raised portion 210 is located between the relative contact surfaces 110; an anti-wear coating 211 is provided on the side of the raised portion 210 facing the contact surface 110.

[0050] It should be noted that the square battery is generally a rectangular parallelepiped, and the adjacent batteries 100 are arranged relative to each other through their respective contact surfaces 110, so that the number of batteries 100 that can be placed in the battery pack is the largest, and the capacity of the battery pack is the largest. During the use of the battery 100, it gradually swells, and the large surface of the battery 100, that is, the contact surface 110, is most likely to deform. The protrusion 210 is arranged between the relative contact surfaces 110 to reserve deformation space for the battery 100. In addition, the protrusion 210 separates the two adjacent batteries 100 so that the relative contact surfaces 110 do not contact each other, which increases the heat dissipation space of the battery 100, reduces the heat transfer between the batteries 100, and improves the heat dissipation effect of the battery 100. In addition, the anti-wear coating 211 can form a protective film between the protrusion 210 and the battery 100 to reduce the direct friction and wear between the battery 100 and the protrusion 210, improve the strength of the shell of the battery 100, extend the service life of the battery 100 and the protrusion 210, and improve the safety of the battery pack.

[0051] Please refer again Figure 2 and Figure 5 In some embodiments, the mounting plate 200 has a plate surface 250 on one side facing the battery 100, and the plate surface 250 is raised on the side facing the battery 100 to form a plurality of raised portions 210. Specifically, the raised portions 210 are formed by the raised plate surface 250, and the plate surface 250 and the raised portions 210 are an integrally formed structure, thereby improving the stability of the raised portions 210, preventing the raised portions 210 from moving or loosening during use, improving the stability and reliability of the raised portions 210, further preventing the battery 100 from moving or shaking, and improving the stability of the battery pack.

[0052] Please refer again Figure 2 and Figure 5 In some embodiments, the mounting plate 200 has a plate surface 250 on one side facing the battery 100, and the plate surface 250 is concave on the side facing the battery 100 to form a plurality of grooves 260, and a protrusion 210 is formed between two adjacent grooves 260. Specifically, the grooves 260 can increase the volume of the space reserved for the battery 100, thereby further improving the deformation accommodation effect of the battery 100 and the heat dissipation effect of the battery 100, and improving the safety of the battery pack.

[0053] Please refer again Figure 2 and Figure 5 In some embodiments, the first corner 130 where the battery 100 meets the plate surface 250 is in an arc shape, and the second corner 212 where the protrusion 210 meets the plate surface 250 is in an arc shape. Specifically, by setting the first corner 130 and the second corner 212 in an arc shape, the stress can be dispersed more evenly, thereby reducing the stress concentration of the battery 100 and the protrusion 210, and reducing the fatigue and damage of the battery 100 and the protrusion 210.

[0054] See also Figure 8 , Figure 8 The three-dimensional structure diagram of the box in the battery pack provided in the embodiment of the present application is illustrated; specifically, in some embodiments, the battery pack further includes a box 300. The box 300 has a plurality of second side panels 310 arranged around the mounting plate 200, and a first limiting portion 311 is provided on the second side panel 310 in the direction of the mounting plate 200; the mounting plate 200 is provided with a second limiting portion 230 in the direction of the second side panel 310, and the first limiting portion 311 is connected with the second limiting portion 230 in cooperation.

[0055] It should be noted that, in the present application, the connection between the box body 300 and the mounting plate 200 is achieved by the cooperation of the first limiting portion 311 and the second limiting portion 230. This cooperative connection method can clearly fix the relative position between the box body 300 and the mounting plate 200, which is conducive to improving the installation accuracy of the box body 300 and the mounting plate 200 and improving the stability of the battery pack.

[0056] Please refer again Figure 2 and Figure 6 Specifically, in some embodiments, the battery 100 includes an explosion-proof valve 120 , the mounting plate 200 is provided with a first exhaust hole 220 , and the explosion-proof valve 120 is connected to the first exhaust hole 220 .

[0057] It should be noted that the explosion-proof valve 120 in the present application is a bottom-out design. If a battery 100 experiences thermal runaway, the high-temperature gas discharged from the explosion-proof valve 120 can be discharged through the first exhaust hole 220, thereby improving the safety in the driving space.

[0058] Specifically, in some embodiments, there are multiple first exhaust holes 220 , and the first exhaust holes 220 and the explosion-proof valves 120 are arranged in a one-to-one correspondence.

[0059] It should be noted that, in this way, if a battery 100 experiences thermal runaway, the high-temperature gas discharged from the explosion-proof valve 120 can be discharged through the first exhaust hole 220, so that the high-temperature gas is kept away from the battery 100 to avoid affecting other batteries 100 in normal state.

[0060] Please also read Figure 1 , Fig. 9 , Fig.10 and Fig.11 , Fig. 9 A top view of a battery pack provided in an embodiment of the present application without a battery installed is shown; Fig.10 Indicated Fig. 9 Schematic diagram of the cross-sectional structure of the CC; Fig.11 Indicated Fig.10A partial enlarged schematic diagram of the D area in the middle; specifically, in some embodiments, the battery pack also includes a bottom plate 400, which is arranged on a side of the mounting plate 200 away from the battery 100 to which it belongs, and a first exhaust area 410 is formed between the bottom plate 400 and the mounting plate 200, and the first exhaust area 410 is connected to the first exhaust hole 220.

[0061] It should be noted that after the first exhaust area 410 is connected to the first exhaust hole 220 , a buffer space is provided for the high-temperature gas to be discharged from the battery pack, which can effectively reduce the pressure of the high-temperature gas directly discharged from the first exhaust hole 220 .

[0062] Please refer again Fig.11 Specifically, in some embodiments, a support member 270 is provided on a side of the mounting plate 200 facing away from the battery 100 , and the support member 270 is connected to the bottom plate 400 .

[0063] It should be noted that if the battery 100 experiences thermal runaway, the discharged high-temperature gas will drive the mounting plate 200 to move toward the bottom plate 400 through pressure, and the setting of the support member 270 can effectively prevent the mounting plate 200 from colliding with the bottom plate 400 when it moves.

[0064] Please refer again Figure 2 and Fig.11 Specifically, in some embodiments, a plurality of first side plates 240 are disposed around the edge of the mounting plate 200 , and a second exhaust hole 241 is opened on the first side plate 240 , and the second exhaust hole 241 is connected to the first exhaust area 410 .

[0065] It should be noted that after the second exhaust hole 241 is connected to the first exhaust area 410, a fixed direction and position are set for the exhaust of high-temperature gas, which can reduce the impact of high-temperature gas exhaust on important components of external electrical equipment according to the actual use of the battery pack.

[0066] Please refer again Figure 8 Specifically, in some embodiments, a plurality of second side panels 310 are surrounded to form a receiving area 320, and the battery 100, the mounting plate 200 and the bottom plate 400 are arranged in the receiving area 320; the box body 300 also includes a third side panel 330, and the third side panel 330 is arranged in the receiving area 320. The third side panel 330 and the second side panel 310 are spaced to form a second exhaust area 340, and the second exhaust area 340 is located on a side of the third side panel 330 away from the battery 100, and the second exhaust area 340 is connected to the first exhaust area 410.

[0067] It should be noted that after the second exhaust area 340 is connected to the first exhaust area 410, it further provides another buffer space for the discharge of high-temperature gas, which can further effectively reduce the pressure of the high-temperature gas directly discharged from the first exhaust hole 220, thereby reducing the impact on important components of external electrical equipment.

[0068] Specifically, in some embodiments, the material of the mounting plate 200 is non-metal.

[0069] It should be noted that the mounting plate 200 in the present application is made of non-metallic material, which has the advantages of light weight, corrosion resistance, good insulation and cost reduction. It has the advantages of reducing the weight of the entire battery pack, protecting the batteries 100 inside the battery pack, and reducing the production cost of the battery pack.

[0070] Accordingly, an embodiment of the present application provides an electric device, and the electric device includes the battery pack provided in the embodiment. The electric device can be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle can be a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, and the like; the electric toy includes a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, and the like. The embodiment of the present application does not impose any special restrictions on the above-mentioned electric device. It can be understood that the electric device can include all the technical features and beneficial effects of the above-mentioned battery pack, which will not be repeated here.

[0071] The battery pack and electrical equipment provided in the embodiments of the present application are introduced in detail above, and the principles and implementation methods of the present application are explained by using specific examples. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: The battery pack has a first direction (X) and a second direction (Y) intersecting each other, and the battery pack includes: A plurality of batteries (100) arranged along the first direction (X); A mounting plate (200), wherein the battery (100) is arranged on one side of the mounting plate (200) along the second direction (Y), and the mounting plate (200) is provided with a plurality of protrusions (210) protruding toward the battery (100), wherein the plurality of protrusions (210) are arranged at intervals along the first direction (X), and the protrusions (210) are spaced between two batteries (100) adjacently arranged along the first direction (X); Along the second direction (Y), the battery (100) has a size of H1 mm, the protrusion (210) has a size of H2 mm, and the battery pack satisfies: 0.05≤H2 / H1≤0.

2.

2. The battery pack according to claim 1, characterized in that: The plurality of protrusions (210) are arranged in a stepped manner along the first direction (X).

3. The battery pack according to claim 2, characterized in that: The dimensions of the plurality of protrusions (210) in the second direction (Y) are arranged to decrease in sequence along the first direction (X); or, The dimensions of the plurality of protrusions (210) in the second direction (Y) are arranged to first decrease and then increase along the first direction (X).

4. The battery pack according to claim 2, characterized in that: Among the plurality of protrusions (210), the maximum dimension in the second direction (Y) is H max , the minimum dimension in the second direction (Y) is H min , the battery pack satisfies: 1<H max / H min ≤2.

5. The battery pack according to claim 2, characterized in that: The mounting plate (200) is made of an elastic material so that the protrusion (210) is in non-rigid contact with the battery (100).

6. The battery pack according to claim 1, characterized in that: The battery (100) is a square battery; the surface with the largest area of ​​the battery (100) is a contact surface (110); adjacent batteries (100) are arranged relative to each other via their respective contact surfaces (110); the raised portion (210) is located between the relative contact surfaces (110); and an anti-wear coating (211) is provided on one side of the raised portion (210) facing the contact surface (110).

7. The battery pack according to claim 1, characterized in that: The mounting plate (200) has a plate surface (250) on one side facing the battery (100), and the plate surface (250) is raised on the side facing the battery (100) to form a plurality of raised portions (210).

8. The battery pack according to claim 1, characterized in that: The mounting plate (200) has a plate surface (250) on one side facing the battery (100), and the plate surface (250) is concave on one side facing the battery (100) to form a plurality of grooves (260), with the protrusion (210) formed between two adjacent grooves (260).

9. The battery pack according to claim 7 or 8, characterized in that: The junction between the battery (100) and the plate surface (250) is a first arc-shaped corner (130), and the junction between the protruding portion (210) and the plate surface (250) is a second arc-shaped corner (212).

10. An electrical device, characterized in that: A battery pack comprising any one of claims 1 to 9.

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