Battery pack and electric device

Abstract

A battery pack and an electric device. The battery pack comprises a case body, a cover body, batteries, and pressing strips. The case body is provided with an accommodating recess; the cover body is connected to the case body and the cover body covers an opening of the accommodating recess; and the batteries are arranged in the accommodating recess, and a plurality of batteries are arranged in multiple rows and multiple columns in a second direction and a third direction to form a battery module, wherein one side of the battery module in a first direction is connected to the bottom surface of the accommodating recess; two adjacent columns of batteries are connected to each other; in a single column of batteries, two adjacent batteries are connected to each other; and the side of the single column of batteries facing the cover body is connected by means of a corresponding pressing strip. In this way, the plurality of batteries are assembled into an integral battery module. The integral battery module has relatively high structural stability, and therefore, the batteries have relatively high use reliability.

Description

Battery pack and electric device

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202422413994.1, filed on September 30, 2024, and entitled "A battery pack and electric device", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of batteries, in particular to a battery pack and electric device. BACKGROUND

[0004] The battery pack comprises a box body and batteries, the batteries are arranged in the box body, and the number of the batteries is multiple, and the multiple batteries form at least one battery group. In the battery group, the multiple batteries need to be assembled into a whole to reduce the risk of shaking of the batteries in the box body, thereby improving the use reliability of the batteries. Therefore, in order to make the batteries have relatively high use reliability, it is necessary to make the battery group as a whole have relatively high structural stability. SUMMARY

[0005] The primary object of the present application is to provide a battery pack with relatively high use reliability.

[0006] In order to achieve the above-mentioned object, the present application provides a battery pack with a first direction, a second direction and a third direction intersecting with each other, comprising a box body, a cover body, multiple batteries and multiple pressing strips.

[0007] The box body has a receiving groove.

[0008] The cover body is connected to the box body, and the cover body covers the slot opening of the receiving groove.

[0009] The multiple batteries are arranged in the receiving groove, and the multiple batteries are arranged as multiple columns of batteries in the second direction and multiple rows of batteries in the third direction to form a battery group. In the multiple columns of batteries, adjacent two columns of batteries are connected to each other, in a single column of batteries in the multiple columns of batteries, adjacent two batteries are connected to each other, and one side of the battery group in the first direction is connected to the groove bottom surface of the receiving groove.

[0010] One of the multiple pressing strips is connected to one column of batteries in the multiple columns of batteries on one side close to the cover body in the first direction, and each battery in the single column of batteries is connected to the same pressing strip in the multiple pressing strips.

[0011] One side of the multiple pressing strips away from the multiple batteries respectively has a reinforcing protrusion, and the reinforcing protrusion extends along the third direction.

[0012] In one specific embodiment of the present application, the plurality of batteries each comprises a shell, an electrode assembly and an insulating member;

[0013] The electrode assembly is arranged in the shell;

[0014] The insulating member covers the outer wall surface of the shell, and the insulating member has a relief area located on the side of the shell close to the plurality of pressing strips, and the outer wall surface of the shell forms an exposed area corresponding to the relief area;

[0015] The plurality of batteries each further comprises an adhesive layer arranged between one of the plurality of batteries and one of the plurality of pressing strips connecting the one of the plurality of batteries, and the adhesive layer connects the exposed area and the one of the plurality of pressing strips.

[0016] In one specific embodiment of the present application, the reinforcing protrusions are in the form of strips, one of the plurality of pressing strips has at least two reinforcing protrusions, and all the reinforcing protrusions of the one of the plurality of pressing strips are arranged in the second direction.

[0017] In one specific embodiment of the present application, the reinforcing protrusions are in the form of strips;

[0018] The reinforcing protrusions extend along a curved trajectory, or extend along a straight trajectory, or extend along a broken line trajectory.

[0019] In one specific embodiment of the present application, the reinforcing protrusions comprise a first connecting portion and a second connecting portion, the first connecting portion is in the form of a strip, the second connecting portion is in the form of a plate, the first connecting portion is connected to the pressing strip comprising the first connecting portion, and the second connecting portion is connected to the side of the first connecting portion away from the pressing strip comprising the first connecting portion.

[0020] In the second direction, the length of the second connecting portion is L mm, the length of the first connecting portion is N mm, and L > N.

[0021] In one specific embodiment of the present application, the side of the second connecting portion away from the first connecting portion is connected to the cover.

[0022] In one specific embodiment of the present application, the plurality of pressing strips respectively comprises a pressing plate, a first limiting plate and a second limiting plate, two ends of the pressing plate in the third direction are respectively connected with the first limiting plate and the second limiting plate, wherein, in a single pressing strip of the plurality of pressing strips, the pressing plate is connected to one side of the single column of batteries in the first direction, the first limiting plate and the second limiting plate are respectively located on two sides of the single column of batteries in the third direction, and the first limiting plate and the second limiting plate are both connected with the single column of batteries.

[0023] The side of the pressing plate away from the single column of batteries is provided with the reinforcing protrusion.

[0024] In one specific embodiment of the present application, an electrical isolation plate is further included, the electrical isolation plate is connected to one side of the battery pack close to the cover in the first direction, the electrical isolation plate is provided with a plurality of first avoiding holes penetrating along the first direction, in the first direction, one first avoiding hole of the plurality of first avoiding holes is directly opposite one exposed area; in the third direction, a limiting area is defined between two adjacent first avoiding holes of the plurality of first avoiding holes, the side of the electrical isolation plate away from the battery pack is provided with a plurality of limiting protrusions spaced apart along the second direction at the limiting area;

[0025] The plurality of pressing strips respectively comprises a pressing plate and a third limiting plate, at least one third limiting plate is connected to at least one side of the pressing plate in the second direction, wherein, in a single pressing strip of the plurality of pressing strips, the pressing plate is connected with the exposed area through the adhesive layer, in the second direction, the pressing plate is located between two adjacent limiting protrusions of the plurality of limiting protrusions, and two sides of the pressing plate in the second direction are respectively in contact with corresponding limiting protrusions of the plurality of limiting protrusions, in the third direction, the third limiting plate is arranged between the two adjacent limiting protrusions of the plurality of limiting protrusions, and the two adjacent limiting protrusions of the plurality of limiting protrusions are in contact with the third limiting plate;

[0026] The side of the pressing plate away from the plurality of batteries is provided with the reinforcing protrusion.

[0027] In one specific embodiment of the present application, the side of the plurality of pressing strips facing the plurality of batteries is respectively provided with a connecting protrusion, and the adhesive layer connects the side of the plurality of pressing strips facing the plurality of batteries, the connecting protrusion and the exposed area.

[0028] In one specific embodiment of the present application, a plurality of first connecting plates and a plurality of second connecting plates are further included.

[0029] The plurality of first connecting plates are arranged at intervals in the second direction, and at least one row of batteries is arranged between any two adjacent first connecting plates in the second direction, and each first connecting plate is connected with an adjacent row of batteries.

[0030] In the single-row battery, any two adjacent batteries are connected by one of the plurality of second connecting plates, and each of the plurality of second connecting plates has a second avoiding hole penetrating in the third direction.

[0031] The application further provides a battery pack and an electric device.

[0032] Compared with the prior art, the battery pack and the electric device have the following beneficial effects:

[0033] The plurality of batteries are arranged in multiple rows and multiple columns in the second direction and the third direction to form a battery pack, wherein one side of the battery pack in the first direction is connected with a bottom surface of the accommodating groove, two adjacent rows of batteries are connected with each other, any two adjacent batteries in the single-row battery are connected with each other, and one side of the single-row battery facing the cover is connected by the pressing strip. In this way, the plurality of batteries are assembled into a battery pack as a whole, and the battery pack as a whole has relatively high structural stability, so that the battery has relatively high use reliability. In addition, the length direction of the pressing strip is the third direction, and one side of the pressing strip away from the battery has the reinforcing protrusion extending in the third direction. Therefore, the pressing strip has relatively high rigidity, and the pressing strip cannot be bent downward when being assembled on the battery, which is beneficial to assembly. In addition, when the pressing strip is connected with the battery and subjected to a series of mechanical actions such as vibration, impact and extrusion, the reinforcing protrusion can disperse shear force, so that the pressing strip cannot be easily broken. BRIEF DESCRIPTION OF DRAWINGS

[0034] FIG. 1 is a perspective view of the battery pack according to the application;

[0035] FIG. 2 is a top view of the battery pack according to the application without the cover;

[0036] FIG. 3 is a perspective view of the battery pack according to the application;

[0037] FIG. 4 is an enlarged view of A in FIG. 3 according to the application;

[0038] FIG. 5 is a sectional view of the battery according to the application;

[0039] FIG. 6 is a perspective view of a first pressing strip according to the application;

[0040] FIG. 7 is a perspective view of a second pressing strip according to the application;

[0041] FIG. 8 is a perspective view of a third pressing strip according to the application;

[0042] Fig. 9 is a perspective view of a fourth pressing strip according to an embodiment of the present application;

[0043] Fig. 10 is a schematic view of the fourth pressing strip according to an embodiment of the present application cooperating with a battery, an adhesive layer and a cover;

[0044] Fig. 11 is a perspective view of a fifth pressing strip according to an embodiment of the present application;

[0045] Fig. 12 is a schematic view of the fifth pressing strip according to an embodiment of the present application cooperating with a battery;

[0046] Fig. 13 is a perspective view of a sixth pressing strip according to an embodiment of the present application;

[0047] Fig. 14 is a schematic view of the sixth pressing strip according to an embodiment of the present application cooperating with a battery;

[0048] Fig. 15 is a perspective view of a seventh pressing strip according to an embodiment of the present application;

[0049] Fig. 16 is a schematic view of two adjacent batteries in a single-row battery pack cooperating with a second connecting plate according to an embodiment of the present application;

[0050] Fig. 17 is a perspective view of a second connecting body according to an embodiment of the present application.

[0051] In the figures, Z, first direction; X, second direction; Y, third direction; 10, battery pack; 1, box body; 101, accommodating groove; 1011, groove opening; 2, cover; 3, battery; 300, battery group; 31, shell; 311, outer wall surface; 310, exposed area; 32, electrode assembly; 33, insulating member; 330, avoiding area; 4, pressing strip; 401, reinforcing protrusion; 4011, first connecting portion; 4012, second connecting portion; 402, connecting protrusion; 41, pressing plate; 42, first limiting plate; 43, second limiting plate; 44, third limiting plate; 5, adhesive layer; 6, electrical isolation plate; 601, first avoiding hole; 602, limiting area; 61, limiting protrusion; 7, first connecting plate; 8, second connecting plate; 801, second avoiding hole. DETAILED DESCRIPTION

[0052] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not used to limit the scope of the present application.

[0053] In the description of the application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0054] In the description of the application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0055] In the application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under" and "under" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0056] In the embodiments of the application, "parallel" means that the angle formed by straight lines, straight lines and surfaces, or surfaces is -1°-1°. In addition, "perpendicular" means that the angle formed by straight lines, straight lines and surfaces, or surfaces is 89°-91°. Equal distance, equal angle or equal area means that the tolerance range is -1%-1%.

[0057] The application provides a kind of electric equipment, it includes the battery pack 10 as follows, wherein, battery pack 10 is used to store and output electric energy, provides power supply for electric equipment, electric equipment includes but is not limited to electric vehicle, unmanned aerial vehicle, mobile power etc.;Since electric equipment uses the following battery pack 10, whereby, electric equipment also has the advantages of the following battery pack 10, the application does not make too much repetition.

[0058] As shown in FIG. 1 to FIG. 17, the battery pack 10 of the preferred embodiment of the application has a first direction Z, a second direction X and a third direction Y perpendicular to each other, the battery pack 10 includes a box body 1, a cover body 2, a battery 3 and a pressing strip 4; the box body 1 has a containing groove 101; the cover body 2 is connected to the box body 1, and the cover body 2 covers the slot opening 1011 of the containing groove 101; the battery 3 is arranged in the containing groove 101, the number of the battery 3 is multiple, the multiple batteries 3 are arranged as multiple columns in the second direction X and multiple rows in the third direction Y to form a battery group 300, wherein, the adjacent two columns of batteries 3 are connected to each other, in a single column of batteries 3, the adjacent two batteries 3 are connected to each other, and one side of the battery group 300 in the first direction Z is connected to the groove bottom surface of the containing groove 101; the number of the pressing strip 4 is multiple, one pressing strip 4 is connected to one column of batteries 3 on the side close to the cover body 2 in the first direction Z, wherein, each battery 3 in a single column of batteries 3 is connected to the pressing strip 4; the side of the pressing strip 4 away from the battery 3 has a reinforcing protrusion 401 extending along the third direction Y.

[0059] Specifically, the battery pack 10 of the application, the multiple batteries 3 are arranged as multiple rows and multiple columns along the second direction X and the third direction Y to form a battery group 300, wherein, one side of the battery group 300 in the first direction Z is connected to the groove bottom surface of the containing groove 101, the adjacent two columns of batteries 3 are connected to each other, in a single column of batteries 3, the adjacent two batteries 3 are connected to each other, and the side of the single column of batteries 3 towards the cover body 2 is connected to each other through the pressing strip 4, in this way, the multiple batteries 3 are assembled into a whole battery group 300, the structural stability of the whole battery group 300 is improved, thereby, the use reliability of the battery 3 is improved; in addition, the length direction of the pressing strip 4 is the third direction Y, since the side of the pressing strip 4 away from the battery 3 has the reinforcing protrusion 401 extending along the third direction Y, thereby, the rigidity of the pressing strip 4 is improved, the pressing strip 4 can be prevented from bending downward when being assembled on the battery 3, which is beneficial to assembly; and after the pressing strip 4 is connected to the battery 3, when subjected to a series of mechanical actions such as vibration, impact and extrusion, the reinforcing protrusion 401 can disperse shear force, so that the pressing strip 4 is not easily broken.

[0060] As shown in FIG. 5 and FIG. 16, the battery pack 10 comprises a shell 31, an electrode assembly 32 and an insulating piece 33; the electrode assembly 32 is arranged in the shell 31; the insulating piece 33 is wrapped on the outer wall surface 311 of the shell 31, and the insulating piece 33 has a relief area 330 located on the side of the shell 31 close to the pressing strip 4, and the outer wall surface 311 of the shell 31 forms a bare area 310 corresponding to the relief area 330; the battery 3 further comprises an adhesive layer 5 arranged between the pressing strip 4 and the battery 3, and the adhesive layer 5 connects the bare area 310 and the pressing strip 4, and connects the battery 3 and the pressing strip 4 in the manner of adhesion, so that the connection strength is high and the connection between the battery 3 and the pressing strip 4 is stable. In addition, in actual application, the insulating piece 33 is an insulating film, the material of the shell 31 is aluminum, the daoyin value of the shell 31 is different from that of the insulating piece 33, and the daoyin value of the surface of the shell 31 is greater than that of the surface of the insulating piece 33, so that the adhesion strength between the shell 31 and the adhesive layer 5 is better, that is, the bare area 310 and the pressing strip 4 are connected through the adhesive layer 5, the connection strength between the pressing strip 4 and the battery 3 is higher, and the overall structural stability of the battery pack 300 is higher.

[0061] The daoyin value refers to the size of the surface tension coefficient. In addition, in actual application, as shown in FIG. 16, the bare area 310 is located at the middle position of the top of the battery 3, and the pressing strip 4 is connected to this area of the battery 3, so that balanced stress can be achieved.

[0062] In some embodiments, as shown in FIG. 7, the reinforcing protrusions 401 are in the form of strips, and the number of the reinforcing protrusions 401 is two, and all the reinforcing protrusions 401 are arranged at intervals along the second direction X. The pressing strip 4 with this structure has good structural mechanical properties, higher rigidity, and the reinforcing protrusions 401 can better disperse shear force when the battery pack 300 is subjected to a series of mechanical actions such as vibration, impact and extrusion. In addition, the number of the reinforcing protrusions 401 can also be three, four or more, which is not limited in the application.

[0063] In some embodiments, the reinforcing protrusions 401 are in the form of strips, and the reinforcing protrusions 401 extend along a curved trajectory or extend along a broken line trajectory. The reinforcing protrusions 401 with this structure can provide strength in the height direction (the first direction Z) of the pressing strip 4, and when the pressing strip 4 is stressed, the curved structure can lengthen the force transmission path and better disperse the force transmission. For example, as shown in FIG. 8, the reinforcing protrusions 401 extend along a curved trajectory.

[0064] In addition, the reinforcing protrusions 401 of the application can also extend along a straight line trajectory, as shown in FIG. 6. The reinforcing protrusions 401 with this structure also have the effect of improving the rigidity of the pressing strip 4.

[0065] As one of the specific implementations of the present application, the pressing strip 4 is in a strip shape, and one end thereof away from the battery 3 directly abuts against or is bonded to the cover 2 by glue. At this time, the pressing strip 4 can also support the cover 2, and the compression / bending resistance of the cover 2 can be improved.

[0066] In some embodiments, as shown in FIGS. 9 and 10, the reinforcing protrusion 401 includes a first connecting portion 4011 in a strip shape and a second connecting portion 4012 in a plate shape, the first connecting portion 4011 is connected to the pressing strip 4, and the second connecting portion 4012 is connected to one side of the first connecting portion 4011 away from the pressing strip 4. In the second direction X, the length of the second connecting portion 4012 is L mm, and the length of the first connecting portion 4011 is N mm, and L > N. The pressing strip 4 with such a structure can also improve the rigidity of the pressing strip 4.

[0067] In addition, in some embodiments, the battery pack 10 needs to be filled with glue as a whole, and the glue fills the pressing strip 4 and the battery group 300. The pressing strip 4 with the above structure has a relatively large surface area, that is, the connection area between the pressing strip 4 and the glue is relatively large. Therefore, the connection strength between the pressing strip 4 and the battery 3 is higher, and the plurality of batteries 3 can be better connected to form a battery group 300 as a whole, and the structural strength of the battery group 300 is improved.

[0068] Optionally, as shown in FIG. 10, one side of the second connecting portion 4012 away from the first connecting portion 4011 is connected to the cover 2, for example, directly abutting against or bonded to the cover 2 by glue. At this time, the pressing strip 4 supports the cover 2, and the compression / bending resistance of the cover 2 can be improved. Since L > N, the second connecting portion 4012 provides a relatively large support area, and the pressure of the pressing strip 4 on the cover 2 when the cover 2 is stressed is reduced.

[0069] In some embodiments, as shown in FIGS. 11 and 12, the pressing strip 4 includes a pressing plate 41, a first limiting plate 42, and a second limiting plate 43. Both ends of the pressing plate 41 in the third direction Y are connected to the first limiting plate 42 and the second limiting plate 43, respectively. In a single pressing strip 4, the pressing plate 41 is connected to one side of a single row of batteries 3 in the first direction Z, the first limiting plate 42 and the second limiting plate 43 are located on both sides of the single row of batteries 3 in the third direction Y, and the first limiting plate 42 and the second limiting plate 43 are connected to the single row of batteries 3. One side of the pressing plate 41 away from the battery 3 has a reinforcing protrusion 401. The pressing strip 4 with such a structure not only connects the single row of batteries 3, but also clamps both sides of the single row of batteries 3 in the third direction Y through the first limiting plate 42 and the second limiting plate 43 cooperating with the pressing plate 41. Therefore, the connection stability of the single row of batteries 3 can be further improved, the overall structural stability of the battery group 300 is higher, and the use reliability of the battery 3 is higher.

[0070] In some embodiments, as shown in FIGS. 13 and 14, the battery pack 10 further comprises an electrical isolation plate 6 connected to one side of the battery group 300 close to the cover 2 in the first direction Z, the electrical isolation plate 6 is provided with a plurality of first avoiding holes 601 penetrating in the first direction Z, in the first direction Z, one first avoiding hole 601 is opposite to one bare area 310; in the third direction Y, a limiting area 602 is defined between two adjacent first avoiding holes 601, and the side of the electrical isolation plate 6 away from the battery group 300 is provided with a plurality of limiting protrusions 61 spaced apart in the second direction X at the limiting area 602; the pressing strip 4 comprises a pressing plate 41 and a plurality of third limiting plates 44, the pressing plate 41 is connected with a plurality of third limiting plates 44 on both sides in the second direction X, wherein, in a single pressing strip 4, the pressing plate 41 is connected with the bare area 310 through the adhesive layer 5, in the second direction X, the pressing plate 41 is located between two adjacent limiting protrusions 61, and the two sides of the pressing plate 41 in the second direction X are in contact with the corresponding limiting protrusions 61 respectively, in the third direction Y, the third limiting plate 44 is arranged between the two limiting protrusions 61 and in contact with the limiting protrusions 61; the side of the pressing plate 41 away from the battery 3 has a reinforcing protrusion 401; the pressing strip 4 with such structure, the pressing plate 41 is connected with the battery 3, in the third direction Y, the third limiting plate 44 is clamped between the two limiting protrusions 61, at this time, the pressing strip 4 not only can improve the structural strength of the battery group 300 as a whole, but also can fix the electrical isolation plate 6, thereby improving the connection stability of the electrical isolation plate 6.

[0071] In some embodiments, as shown in FIG. 15, the side of the pressing strip 4 facing the battery 3 is provided with a connecting protrusion 402, and the adhesive layer 5 connects the side of the pressing strip 4 facing the battery 3, the connecting protrusion 402 and the bare area 310; the pressing strip 4 with such structure, the connecting protrusion 402 is equivalent to increasing the contact area of the pressing strip 4 and the adhesive layer 5, which can improve the connection strength of the pressing strip 4 and the adhesive layer 5.

[0072] Preferably, the end of the connecting protrusion 402 away from the pressing strip 4 is in contact with the battery 3, at this time, the connecting protrusion 402 plays a role in limiting the distance between the pressing strip 4 and the battery 3, thereby in actual application, the bonding thickness of the adhesive layer 5 can be controlled so that the adhesive layer 5 is in a suitable thickness, which can increase the bonding effect.

[0073] In the present application, as shown in FIG. 4, FIG. 16 and FIG. 17, the battery pack 10 further comprises a plurality of first connecting plates 7 and a plurality of second connecting plates 8; the plurality of first connecting plates 7 are arranged at intervals along the second direction X, at least one row of batteries 3 is arranged between any two adjacent first connecting plates 7 along the second direction X, and each first connecting plate 7 is connected with an adjacent row of batteries 3; in a single row of batteries 3, any two adjacent batteries 3 are connected by a second connecting plate 8, and the second connecting plate 8 has a second avoiding hole 801 penetrating along the third direction Y; specifically, the first connecting plate 7 and the second connecting plate 8 are both connected with the battery 3 by means of adhesion, and in this way, a plurality of batteries 3 are connected to form a battery group 300, and the battery group 300 as a whole has high structural strength; in addition, the second connecting plate 8 has the second avoiding hole 801, the second avoiding hole 801 is filled with a glue layer, and the provision of the second avoiding hole 801 can provide an avoiding space for the battery 3 to expand and deform, can avoid the battery 3 from being stressed too much when expanding, and is conducive to ensuring the normal use of the battery 3.

[0074] The above only describes the preferred embodiments of the present application, and it should be noted that those of ordinary skill in the art can make several improvements and replacements without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. A battery pack, having a first direction (Z), a second direction (X) and a third direction (Y) intersecting with each other, comprising a box (1), a cover (2), a plurality of batteries (3) and a plurality of pressing strips (4); the box (1) has a receiving groove (101); the cover (2) is connected to the box (1), and the cover (2) covers the groove opening of the receiving groove (101); The plurality of batteries (3) is arranged in the second direction (X) as a plurality of columns of batteries (3) and in the third direction (Y) as a plurality of rows of batteries (3) to form a battery pack (300), wherein adjacent two columns of batteries (3) in the plurality of columns of batteries (3) are connected to each other, adjacent two batteries (3) in a single column of batteries (3) in the plurality of columns of batteries (3) are connected to each other, and one side of the battery group (300) in the first direction (Z) is connected to the groove bottom surface of the receiving groove (101); one pressing strip (4) in the plurality of pressing strips (4) is connected to one side of a column of batteries (3) in the plurality of columns of batteries (3) close to the cover (2) in the first direction (Z), wherein each battery (3) in the single column of batteries (3) is connected to the same pressing strip (4) in the plurality of pressing strips (4); one side of the plurality of pressing strips (4) away from the plurality of batteries (3) respectively has a reinforcing protrusion (401), and the reinforcing protrusion (401) extends along the third direction (Y).

2. The battery pack of claim 1, wherein, The plurality of batteries (3) respectively comprise a shell (31), an electrode assembly (32) and an insulating member (33); the electrode assembly (32) is arranged in the shell (31); the insulating member (33) covers the outer wall surface of the shell (31), and the insulating member (33) has a relief area (330) located at one side of the shell (31) close to the plurality of pressing strips (4), and the outer wall surface of the shell (31) forms a bare area (310) corresponding to the relief area (330); The plurality of batteries (3) respectively further comprise an adhesive layer (5) arranged between one battery (3) comprising the plurality of batteries (3) and one pressing strip (4) in the plurality of pressing strips (4) connected to the one battery (3) comprising the plurality of batteries (3), and the adhesive layer (5) connects the bare area (310) and the one pressing strip (4) in the plurality of pressing strips (4).

3. The battery pack of claim 2, wherein, The insulating member (33) is an insulating film, and the shell (31) is made of aluminum.

4. The battery pack of claim 2, wherein, The surface of the insulating member (33) and the surface of the shell (31) have different gyri values, and the gyri value of the surface of the shell (31) is greater than the gyri value of the surface of the insulating member (33).

5. The battery pack of any of claims 1-2, wherein, The reinforcing protrusion (401) is in a strip shape, one pressing strip (4) in the plurality of pressing strips (4) has at least two reinforcing protrusions (401), and all the reinforcing protrusions (401) of the one pressing strip (4) in the plurality of pressing strips (4) are arranged in a spaced manner along the second direction (X).

6. The battery pack of any of claims 1-2, wherein, The reinforcing protrusion (401) is in a strip shape; The reinforcing protrusion (401) extends along a curved trajectory, or extends along a straight trajectory, or extends along a broken line trajectory.

7. The battery pack of any of claims 1-2, wherein, The reinforcing protrusion (401) comprises a first connecting part (4011) and a second connecting part (4012), the first connecting part (4011) is in a strip shape, the second connecting part (4012) is in a plate shape, the first connecting part (4011) is connected to the pressing strip (4) comprising it in the plurality of pressing strips (4), and the second connecting part (4012) is connected to the side of the first connecting part (4011) away from the pressing strip (4) comprising it. In the second direction (X), the length dimension of the second connecting part (4012) is L mm, and the length dimension of the first connecting part (4011) is N mm, L>N.

8. The battery pack of claim 7, wherein, The side of the second connecting part (4012) away from the first connecting part (4011) is connected to the cover body (2).

9. The battery pack of any of claims 1-2, wherein, The plurality of pressing strips (4) respectively comprise a pressing plate (41), a first limiting plate (42) and a second limiting plate (43), both ends of the pressing plate (41) in the third direction (Y) are connected to the first limiting plate (42) and the second limiting plate (43) respectively, wherein in a single pressing strip (4) in the plurality of pressing strips (4), the pressing plate (41) is connected to one side of the single-row battery (3) in the first direction (Z), the first limiting plate (42) and the second limiting plate (43) are respectively located on both sides of the single-row battery (3) in the third direction (Y), and the first limiting plate (42) and the second limiting plate (43) are both connected to the single-row battery (3). The side of the pressing plate (41) away from the single-row battery (3) is provided with the reinforcing protrusion (401).

10. The battery pack of claim 2, wherein, Further comprising an electrical isolation plate (6) connected to one side of the battery pack (300) in the first direction (Z) close to the cover body (2), the electrical isolation plate (6) is provided with a plurality of first avoiding holes (601) penetrating in the first direction (Z), in the first direction (Z), one first avoiding hole (601) in the plurality of first avoiding holes (601) is directly opposite one exposed area (310); in the third direction (Y), a limiting area (602) is defined between adjacent two first avoiding holes (601) in the plurality of first avoiding holes (601), and the side of the electrical isolation plate (6) away from the battery pack (300) is provided with a plurality of limiting protrusions (61) arranged at intervals in the second direction (X) at the limiting area (602). The plurality of pressing strips (4) respectively comprises a pressing plate (41) and a third limiting plate (44), at least one third limiting plate (44) is connected to at least one side of the pressing plate (41) in the second direction (X), wherein in a single pressing strip (4) of the plurality of pressing strips (4), the pressing plate (41) is connected to the exposed area (310) through the adhesive layer (5), in the second direction (X), the pressing plate (41) is located between two adjacent limiting protrusions (61) in the plurality of limiting protrusions (61), and the two sides of the pressing plate (41) in the second direction (X) are respectively in contact with the corresponding limiting protrusions (61) in the plurality of limiting protrusions (61), and in the third direction (Y), the third limiting plate (44) is arranged between two adjacent limiting protrusions (61) in the plurality of limiting protrusions (61), and the two adjacent limiting protrusions (61) in the plurality of limiting protrusions (61) are in contact with the third limiting plate (44); The pressing plate (41) has the reinforcing protrusion (401) on the side away from the plurality of batteries (3).

11. The battery pack of claim 2, wherein, The plurality of pressing strips (4) respectively comprises a pressing plate (41) and a third limiting plate (44), at least one third limiting plate (44) is connected to at least one side of the pressing plate (41) in the second direction (X), wherein in a single pressing strip (4) of the plurality of pressing strips (4), the pressing plate (41) is connected to the exposed area (310) through the adhesive layer (5), in the second direction (X), the pressing plate (41) is located between two adjacent limiting protrusions (61) in the plurality of limiting protrusions (61), and the two sides of the pressing plate (41) in the second direction (X) are respectively in contact with the corresponding limiting protrusions (61) in the plurality of limiting protrusions (61), and in the third direction (Y), the third limiting plate (44) is arranged between two adjacent limiting protrusions (61) in the plurality of limiting protrusions (61), and the two adjacent limiting protrusions (61) in the plurality of limiting protrusions (61) are in contact with the third limiting plate (44); 12. The battery pack of claim 11, wherein, The pressing plate (41) has the reinforcing protrusion (401) on the side away from the plurality of batteries (3).

13. The battery pack of claim 1, wherein, The plurality of pressing strips (4) respectively comprises a pressing plate (41) and a third limiting plate (44), at least one third limiting plate (44) is connected to at least one side of the pressing plate (41) in the second direction (X), wherein in a single pressing strip (4) of the plurality of pressing strips (4), the pressing plate (41) is connected to the exposed area (310) through the adhesive layer (5), in the second direction (X), the pressing plate (41) is located between two adjacent limiting protrusions (61) in the plurality of limiting protrusions (61), and the two sides of the pressing plate (41) in the second direction (X) are respectively in contact with the corresponding limiting protrusions (61) in the plurality of limiting protrusions (61), and in the third direction (Y), the third limiting plate (44) is arranged between two adjacent limiting protrusions (61) in the plurality of limiting protrusions (61), and the two adjacent limiting protrusions (61) in the plurality of limiting protrusions (61) are in contact with the third limiting plate (44); The second avoiding hole (801) is filled with a glue layer. The battery pack comprises the battery pack of any one of claims 1-14.

14. The battery pack of claim 13, wherein, ​ 15. An electrical device, comprising: ​

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