Battery cover plate, battery and battery pack

Abstract

The utility model provides a battery cover plate, a battery and a battery pack, the battery cover plate comprises a first cover plate and a second cover plate, the first cover plate comprises a first pole assembly and a first connecting piece, one end of the first pole assembly is used for being connected to one end of a shell of the battery, and the other end of the first pole assembly penetrates through the first connecting piece; the first connecting piece is provided with a first convex part and a first concave part; the second cover plate comprises a second pole assembly and a second connecting piece, one end of the second pole assembly is used for being connected to the other end of the shell, the other end of the second pole assembly penetrates through the second connecting piece, and the second connecting piece is provided with a second convex part and a second concave part; wherein the second convex part is used for being clamped with the first concave part of the adjacent battery, and the first convex part is used for being clamped with the second concave part of the adjacent battery.

Description

Technical Field

[0001] The present application relates to the technical field of battery assembly, and in particular to a battery cover, a battery and a battery pack. Background Art

[0002] When the batteries in the battery pack are connected through aluminum bars, the aluminum bar covers are set at the polar ends of the batteries in the array. The aluminum bars will occupy some space, resulting in low internal space utilization of the battery pack, and the stability of the connection between the battery and the aluminum bar is general. The battery is easily dislocated or damaged due to interference from external factors such as mechanical vibration. Utility Model Content

[0003] The present application provides a battery cover, a battery and a battery pack to solve the problems in the prior art that the battery pack has low space utilization and the battery is easily misplaced or damaged.

[0004] In the first aspect, the present application provides a battery cover, which includes a first cover and a second cover, the first cover including a first pole assembly and a first connector, one end of the first pole assembly is used to connect to one end of a battery shell, the other end of the first pole assembly is passed through the first connector, and the first connector is provided with a first convex portion and a first concave portion; the second cover includes a second pole assembly and a second connector, one end of the second pole assembly is used to connect to the other end of the shell, the other end of the second pole assembly is passed through the second connector, and the second connector is provided with a second convex portion and a second concave portion; wherein the second convex portion is used to clamp with the first concave portion of an adjacent battery, and the first convex portion is used to clamp with the second concave portion of an adjacent battery.

[0005] In one possible embodiment, the first connecting member has a first surface arranged along the first direction, the first convex portion is a protrusion protruding outward from the first surface along the second direction, the second direction intersects with the first direction, and the first concave portion is a groove formed by the first surface being recessed inward along the second direction; and / or, the second connecting member has a second surface arranged along the first direction, the second convex portion is a protrusion protruding outward from the second surface along the second direction, and the second concave portion is a groove formed by the second surface being recessed inward along the second direction.

[0006] In a possible implementation, along the second direction, a ratio of a protruding length of the first protrusion to a thickness of the first connecting member is less than or equal to 3 / 4; along the third direction, a ratio of a width of the first protrusion to a width of the first connecting member is less than or equal to 5 / 24, and the third direction intersects with the second direction; and / or

[0007] Along the second direction, the ratio of the depth of the first recess to the thickness of the first connecting member is less than or equal to 3 / 4; along the third direction, the ratio of the width of the first recess to the width of the first connecting member is less than or equal to 5 / 24; and / or

[0008] Along the second direction, the ratio of the protruding length of the second protrusion to the thickness of the second connecting member is less than or equal to 3 / 4; along the third direction, the ratio of the width of the second protrusion to the width of the second connecting member is less than or equal to 5 / 24; and / or

[0009] Along the second direction, a ratio of the depth of the second recess to the thickness of the second connecting member is less than or equal to 3 / 4; along the third direction, a ratio of the width of the second recess to the width of the second connecting member is less than or equal to 5 / 24.

[0010] In a possible implementation manner, along the second direction, the depth of the first concave portion is greater than or equal to the protruding length of the second protruding portion; and / or

[0011] Along a third direction, a width of the first concave portion is greater than or equal to a width of the second convex portion, and the third direction intersects with the second direction; and / or

[0012] Along the second direction, the depth of the second concave portion is greater than or equal to the protruding length of the first convex portion; and / or

[0013] Along the third direction, a width of the second concave portion is greater than or equal to a width of the first convex portion.

[0014] In a possible implementation manner, along a third direction, the first convex portion and the first concave portion are provided on opposite sides of the first surface, and the third direction intersects with the first direction and the second direction;

[0015] The second convex portion and the second concave portion are provided on opposite sides of the second surface along the third direction.

[0016] In a possible implementation manner, the first cover plate is provided with a conductive portion, and the conductive portion is provided on the first connecting member and is electrically connected to the first connecting member.

[0017] In a possible implementation manner, the first pole assembly includes a first mounting plate, a first conductive member, a second mounting plate, and a first pole, wherein the first mounting plate, the first conductive member, and the second mounting plate are sequentially arranged along the second direction, the second mounting plate is used to be connected to the housing, the first connecting member is connected to a side of the first mounting plate away from the second mounting plate, and the first pole is sequentially passed through the second mounting plate, the first conductive member, and the first mounting plate; and / or

[0018] The second pole assembly includes a third mounting plate, a second conductive member, a fourth mounting plate, and a second pole. The third mounting plate, the second conductive member, and the fourth mounting plate are sequentially arranged along the second direction. The fourth mounting plate is used to be connected to the shell. The second connecting member is connected to a side of the third mounting plate away from the fourth mounting plate. The second pole is sequentially passed through the fourth mounting plate, the second conductive member, and the third mounting plate.

[0019] In a second aspect, the present application also provides a battery, comprising a shell, a battery cell, and the above-mentioned battery cover plate, wherein the shell is provided with an installation cavity, and the battery cell is accommodated in the installation cavity, and along the second direction, the first cover plate and the second cover plate are respectively connected to opposite ends of the shell for closing the installation cavity.

[0020] In a third aspect, the present application also provides a battery pack, comprising at least two of the above-mentioned batteries, and at least two of the batteries are connected to each other.

[0021] In a possible implementation manner, one of the at least two batteries is clamped and connected to the first recessed portion of an adjacent battery via the second protrusion, and is clamped and connected to the first protrusion of the adjacent battery via the second recess.

[0022] The battery cover of the present application is provided with a first protrusion and a first recess on the first connecting member of the first cover, and a second protrusion and a second recess on the second connecting member of the second cover. When two batteries are arranged along the second direction, the first protrusion is clamped in the second recess of the adjacent battery, and the second protrusion is clamped in the first recess of the adjacent battery, thereby achieving mutual clamping between the two adjacent batteries and improving the stability when the two batteries are connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 FIG. 1 is a schematic diagram of the structure of a battery in one embodiment of the present application.

[0024] Figure 2 FIG. 1 is a schematic diagram of an explosion of a battery according to an embodiment of the present application.

[0025] Figure 3 for Figure 2 A schematic diagram of the structure of a battery cell in one embodiment of the battery.

[0026] Figure 4 Schematic diagram of the structure of a first cover plate of a battery cover plate of the present application in one embodiment.

[0027] Figure 5 Schematic diagram of the structure of the second cover plate of the battery cover plate of the present application in one embodiment.

[0028] Figure 6 This is a schematic structural diagram of a battery cover in one embodiment of the present application when a first cover plate and a second cover plate are docked.

[0029] Figure 7 It is a side view schematic diagram of a first cover plate in one embodiment of a battery cover plate of the present application.

[0030] Figure 8 It is a side view schematic diagram of a second cover plate in one embodiment of the battery cover plate of the present application.

[0031] Fig. 9 This is an exploded schematic diagram of a first cover plate in one embodiment of a battery cover plate of the present application.

[0032] Fig.10 FIG. 1 is an exploded schematic diagram of a second cover plate in one embodiment of a battery cover plate of the present application.

[0033] Fig.11 It is a schematic structural diagram of a battery pack of the present application in one embodiment.

[0034] Description of main component symbols:

[0035] Battery Pack 300

[0036] Battery 200

[0037] Battery cover 100

[0038] First direction X

[0039] The second direction Z

[0040] The third direction Y

[0041] First surface P1

[0042] First side P2

[0043] Second surface P3

[0044] Second side P4

[0045] First guide surface M1

[0046] Second guide surface M2

[0047] The third guide surface M3

[0048] Fourth guide surface M4

[0049] First chamfer R1

[0050] Second chamfer R2

[0051] The third chamfer R3

[0052] Fourth chamfer R4

[0053] Housing 10

[0054] Mounting cavity 11

[0055] First cover plate 20

[0056] The first connecting member 21

[0057] first convex portion 211

[0058] first recess 212

[0059] First perforation 213

[0060] The first pole assembly 22

[0061] First mounting plate 221

[0062] The third perforation 2210

[0063] Mounting slot 2211

[0064] The first conductive member 222

[0065] Fourth perforation 2220

[0066] Second mounting plate 223

[0067] Fifth perforation 2230

[0068] First pole 224

[0069] Connection 2241

[0070] Pole 2242

[0071] Second cover plate 30

[0072] The second connecting member 31

[0073] Second convex portion 311

[0074] Second recess 312

[0075] Second perforation 313

[0076] The second pole assembly 32

[0077] The third mounting plate 321

[0078] The second conductive element 322

[0079] Fourth mounting plate 323

[0080] Second pole 324

[0081] Battery Cell 40

[0082] Positive terminal 41

[0083] Negative terminal 42

[0084] Box 50

[0085] Voltage detection unit 60

[0086] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0087] The following description will refer to the accompanying drawings to more fully describe the content of the present application. Shown in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals represent identical or similar components.

[0088] The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include the plural forms. In addition, when used herein, "including" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not exclude the existence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0089] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant technology and the content of this application, and will not be interpreted as an idealized or overly formal meaning.

[0090] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0091] like Figures 1 to 3 As shown, the embodiment of the present application provides a battery cover 100, which is applied to a battery 200. The battery 200 can be a lithium-ion battery, a nickel-hydrogen battery, a fuel cell, etc.

[0092] The battery 200 includes a shell 10 and a battery cell 40. The shell 10 is provided with an installation cavity 11, and the installation cavity 11 passes through both ends of the shell 10 along the second direction Z, so that both ends of the shell 10 are open. The battery cell 40 is accommodated in the installation cavity 11, and the battery cell 40 can be charged or discharged. The battery cell 40 has a positive terminal 41 and a negative terminal 42, and along the second direction Z, the positive terminal 41 and the negative terminal 42 are respectively arranged at opposite ends of the battery cell 40. The battery cover 100 is used to close the two ends of the shell 10 of the battery 200 along the second direction Z, so as to protect the battery cell 40 installed in the shell 10. In addition, the battery cover 100 is also electrically connected to the positive terminal 41 and the negative terminal 42 of the battery cell 40.

[0093] Please also read Figures 4 to 6 The battery cover 100 includes a first cover 20 and a second cover 30. The first cover 20 includes a first pole assembly 22 and a first connector 21, and one end of the first pole assembly 22 is used to connect to one end of the housing 10. The other end of the first pole assembly 22 is inserted into the first connector 21, and the first connector 21 is provided with a first convex portion 211 and a first concave portion 212. The second cover 30 includes a second pole assembly 32 and a second connector 31, and one end of the second pole assembly 32 is used to connect to the other end of the housing 10, so that the two ends of the installation cavity 11 are closed by the first pole assembly 22 and the second pole assembly 32 to protect the battery cell 40 in the housing 10. The other end of the second pole assembly 32 is inserted into the second connector 31, and the second connector 31 is provided with a second convex portion 311 and a second concave portion 312.

[0094] When at least two batteries 200 are arranged along the second direction Z, any two adjacent batteries 200 are connected to each other, and the second protrusion 311 of one of the two adjacent batteries 200 is used to clamp with the first recess 212 of the other battery 200, and the first protrusion 211 of one of the two adjacent batteries 200 is used to clamp with the second recess 312 of the other battery 200.

[0095] It is worth noting that, for the convenience of subsequent reading, the present application introduces a first direction X, a second direction Z and a third direction Y to describe the embodiments of the present application. The first direction X, the second direction Z and the third direction Y can be three non-parallel linear directions in space; further, the first direction X, the second direction Z and the third direction Y can be three mutually perpendicular directions in a three-dimensional coordinate system (three-dimensional Cartesian coordinate system). In the subsequent embodiments, the first direction X is the X-axis direction of the coordinate axis of the three-dimensional coordinate system, the second direction Z is the Z-axis direction of the coordinate axis of the three-dimensional coordinate system, and the third direction Y is the Y-axis direction of the coordinate axis of the three-dimensional coordinate system.

[0096] In this way, the battery cover 100 of the present application is provided with a first convex portion 211 and a first concave portion 212 on the first connector 21 of the first cover 20, and a second convex portion 311 and a second concave portion 312 on the second connector 31 of the second cover 30. When two batteries 200 are arranged along the second direction Z, the first convex portion 211 is clamped in the second concave portion 312 of the adjacent battery 200, and the second convex portion 311 is clamped in the first concave portion 212 of the adjacent battery 200, thereby realizing mutual clamping between the two adjacent batteries 200 and improving the stability of the two batteries 200 when connected. In addition, the two adjacent batteries 200 are directly connected in series along the second direction Z by the clamping connection of the first convex portion 211 and the second concave portion 312 and the clamping connection of the second convex portion 311 and the first concave portion 212, and the two adjacent batteries 200 are electrically connected through the first cover 20 and the second cover 30, without the need to set additional components such as aluminum bars, thereby improving the space utilization of the battery pack 300.

[0097] Please combine again Figures 4 to 6 , and see Figure 2 and Figure 3 In one embodiment, the first pole assembly 22 is used to be electrically connected to the battery cell 40, and the second pole assembly 32 is also used to be electrically connected to the battery cell 40. One of the first pole assembly 22 and the second pole assembly 32 is electrically connected to the positive terminal 41 of the battery cell 40, and the other of the two is electrically connected to the negative terminal 42 of the battery cell 40.

[0098] It is understandable that the polarity of the terminals of the battery cell 40 electrically connected to the first pole assembly 22 and the second pole assembly 32 can be adaptively adjusted according to actual design requirements, and it is only necessary to ensure that the polarity of the terminals of the battery cell 40 electrically connected to the first pole assembly 22 and the second pole assembly 32 are opposite.

[0099] Furthermore, the first connector 21 and the second connector 31 are both made of conductive materials, specifically conductive metal materials such as aluminum. In addition, the first protrusion 211 is made of the same material as the first connector 21 , and the second protrusion 311 is made of the same material as the second connector 31 .

[0100] The first connector 21 is electrically connected to the first pole assembly 22, and the second connector 31 is electrically connected to the second pole assembly 32. When the first protrusion 211 and the second recess 312 are clamped, the first protrusion 211 and the inner wall of the second recess 312 are in contact to achieve electrical connection therebetween, and the second protrusion 311 and the inner wall of the first recess 212 are in contact to achieve electrical connection therebetween, thereby forming a conductive path between the first connector 21 and the second connector 31 of two adjacent batteries 200.

[0101] Please combine again Figures 3 to 6In one embodiment, the first connecting member 21 is substantially a square plate, and the first connecting member 21 has a first surface P1 and a plurality of first side surfaces P2, and the plurality of first side surfaces P2 surround and connect the first surface P1. The first surface P1 extends along the first direction X, and along the second direction Z, the first surface P1 is disposed on a side of the first connecting member 21 away from the housing 10. The first convex portion 211 is a protrusion protruding outwardly from the first surface P1 along the second direction Z, and the first convex portion 211 is integrally formed with the first connecting member 21. The first concave portion 212 is a groove formed by being concave inwardly from the first surface P1 along the second direction Z.

[0102] It is understood that the first convex portion 211 may be a regular or irregular shape such as a "T" shape, rectangle, semicircle, arc, etc. The first concave portion 212 may be a regular or irregular shape such as a "T" shape, rectangle, semicircle, arc, etc.

[0103] The second connecting member 31 has a substantially identical shape to the first connecting member 21, and the second connecting member 31 has a second surface P3 and a plurality of second side surfaces P4, and the plurality of second side surfaces P4 surround and connect the second surface P3. The second surface P3 extends along the first direction X, and along the second direction Z, the second surface P3 is disposed on a side of the second connecting member 31 away from the housing 10. The second convex portion 311 is a protrusion protruding outwardly from the second surface P3 along the second direction Z, and the second convex portion 311 is integrally formed with the second connecting member 31. The second concave portion 312 is a groove formed by being concave inwardly from the second surface P3 along the second direction Z.

[0104] The shape of the first convex portion 211 matches the shape of the second concave portion 312 to ensure stability when the first convex portion 211 and the second concave portion 312 are clamped. In addition, the shape of the second convex portion 311 matches the shape of the first concave portion 212 to ensure stability when the second convex portion 311 and the first concave portion 212 are clamped.

[0105] When two batteries 200 are docked along the second direction Z, the first protrusion 211 of one battery 200 is clamped in the second recess 312 of the adjacent battery 200, and the first recess 212 of the battery 200 clamps the second protrusion 311 of the adjacent battery 200. At this time, along the third direction Y, the outer surface of at least one side of the first protrusion 211 abuts against the inner surface of at least one side of the second recess 312, so that the first protrusion 211 is limited in the second recess 312, and along the third direction Y, the outer surface of at least one side of the second protrusion 311 abuts against the inner surface of at least one side of the first recess 212, so that the second protrusion 311 is limited in the first recess 212, thereby achieving the position limitation between the two adjacent batteries 200. In addition, when the first protrusion 211 is clamped in the second recess 312, the outer wall of the first protrusion 211 can be connected to the inner wall of the second recess 312 through a welding process, and when the second protrusion 311 is clamped in the first recess 212, the outer wall of the second protrusion 311 can be connected to the inner wall of the first recess 212 through a welding process, thereby improving the stability of two adjacent batteries 200 when docking.

[0106] Please combine again Figures 4 to 8 In one embodiment, the extension directions of the first convex portion 211 and the first concave portion 212 are both parallel to the first direction X. Along the first direction X, the extension lengths of the first convex portion 211 and the first concave portion 212 are both less than the extension length of the first connecting member 21. In addition, along the third direction Y, the first convex portion 211 and the first concave portion 212 are spaced apart.

[0107] The extension directions of the second convex portion 311 and the second concave portion 312 are both parallel to the first direction X. Along the first direction X, the extension lengths of the second convex portion 311 and the second concave portion 312 are both shorter than the extension length of the second connecting member 31. In addition, along the third direction Y, the second convex portion 311 and the second concave portion 312 are spaced apart.

[0108] Along the second direction Z, the ratio of the protruding length of the first protrusion 211 to the thickness of the first connecting member 21 is less than or equal to 3 / 4. Along the third direction Y, the ratio of the width of the first protrusion 211 to the width of the first connecting member 21 is less than or equal to 5 / 24.

[0109] Along the second direction Z, the ratio of the depth of the first recess 212 to the thickness of the first connector 21 is less than or equal to 3 / 4. Along the third direction Y, the ratio of the width of the first recess 212 to the width of the first connector 21 is less than or equal to 5 / 24.

[0110] In some embodiments, the length of the first connecting member 21 along the first direction X is 120 mm. The thickness of the first connecting member 21 along the second direction Z is 4 mm. The width of the first connecting member 21 along the third direction Y is 24 mm.

[0111] The groove depth of the first concave portion 212 is less than or equal to 3 mm, and the groove depth of the first concave portion 212 may be 1 mm, 2 mm, or 3 mm, etc. The groove width of the first concave portion 212 is less than or equal to 5 mm, and the groove width of the first concave portion 212 may be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm, etc. Along the first direction X, the extension length of the first concave portion 212 is less than 120 mm.

[0112] The protruding length of the first convex portion 211 is less than or equal to 3 mm, and the protruding length of the first convex portion 211 can be 1 mm, 2 mm, or 3 mm, etc. The width of the first convex portion 211 is less than or equal to 5 mm, and the width of the first convex portion 211 can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm, etc. Along the first direction X, the extension length of the first convex portion 211 is less than 120 mm.

[0113] Along the second direction Z, the ratio of the protruding length of the second protrusion 311 to the thickness of the second connection member 31 is less than or equal to 3 / 4. Along the third direction Y, the ratio of the width of the second protrusion 311 to the width of the second connection member 31 is less than or equal to 5 / 24.

[0114] Along the second direction Z, the ratio of the groove depth of the second recess 312 to the thickness of the second connecting member 31 is less than or equal to 3 / 4. Along the third direction Y, the ratio of the groove width of the second recess 312 to the width of the second connecting member 31 is less than or equal to 5 / 24.

[0115] In some embodiments, the length of the second connecting member 31 along the first direction X is 115 mm. The thickness of the second connecting member 31 along the second direction Z is 4 mm. The width of the second connecting member 31 along the third direction Y is 24 mm.

[0116] The groove depth of the second concave portion 312 is less than or equal to 3 mm, and the groove depth of the second concave portion 312 may be 1 mm, 2 mm, or 3 mm, etc. The groove width of the second concave portion 312 is less than or equal to 5 mm, and the groove width of the second concave portion 312 may be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm, etc. Along the first direction X, the extension length of the second concave portion 312 is less than 115 mm.

[0117] The protruding length of the second convex portion 311 is less than or equal to 3 mm, and the protruding length of the second convex portion 311 can be 1 mm, 2 mm, or 3 mm, etc. The width of the second convex portion 311 is less than or equal to 5 mm, and the width of the second convex portion 311 can be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm, etc. Along the first direction X, the extension length of the second convex portion 311 is less than 120 mm.

[0118] It is understandable that, in other embodiments, the extension directions of the first convex portion 211 and the first concave portion 212 may be parallel to other directions such as the third direction Y. Accordingly, the extension directions of the second convex portion 311 and the second concave portion 312 are also parallel to other directions such as the third direction Y.

[0119] It is worth noting that the groove depth of the first recess 212 is greater than or equal to the protruding length of the second protrusion 311, and the groove depth of the second recess 312 is greater than or equal to the protruding length of the first protrusion 211, so as to ensure that when two adjacent batteries 200 are docked, the first surface P1 of one battery 200 is abutted against the second surface P3 of the other battery 200.

[0120] Specifically, the first concave portion 212 and the second convex portion 311 are used as an example for explanation. When the groove depth of the first concave portion 212 is the same as the protruding length of the second convex portion 311, when the second convex portion 311 is clamped in the first concave portion 212, the end surface of the second convex portion 311 away from the second surface P3 abuts against the bottom wall of the first concave portion 212. When the groove depth of the first concave portion 212 is greater than the protruding length of the second convex portion 311, the end surface of the second convex portion 311 away from the second surface P3 is spaced from the bottom wall of the first concave portion 212, and the electrical connection between the two is achieved only after the outer surface of the second convex portion 311 contacts the inner surface of the first concave portion 212.

[0121] Please combine again Figures 4 to 8 In one embodiment, along the third direction Y, the first convex portion 211 and the first concave portion 212 are disposed on two opposite sides of the first surface P1. Along the third direction Y, the second convex portion 311 and the second concave portion 312 are disposed on two opposite sides of the second surface P3.

[0122] Further, the first concave portion 212 is recessed inwardly along the third direction Y on the surface of the first connector 21 on one side along the third direction Y. Along the third direction Y, the outer surface of one side of the first convex portion 211 is coplanar with the surface of one side of the first connector 21 on the third direction Y. The second concave portion 312 is recessed inwardly along the third direction Y on the surface of one side of the second connector 31 on the third direction Y. Along the third direction Y, the outer surface of one side of the second convex portion 311 is coplanar with the surface of one side of the second connector 31 on the third direction Y.

[0123] Specifically, along the third direction Y, one side of the first concave portion 212 extends to one first side surface P2, so that the first concave portion 212 is located at the connection between one first side surface P2 and the first surface P1 of the first connecting member 21. Along the third direction Y, one side of the first convex portion 211 extends to another first side surface P2, so that the first convex portion 211 is located at the connection between one first side surface P2 and the first surface P1 of the first connecting member 21.

[0124] Along the third direction Y, one side of the second concave portion 312 extends to a second side surface P4, so that the second concave portion 312 is located at the connection between a second side surface P4 and the second surface P3 of the second connector 31. Along the third direction Y, one side of the second convex portion 311 extends to another second side surface P4, so that the second convex portion 311 is located at the connection between a second side surface P4 and the second surface P3 of the second connector 31.

[0125] Thus, when the second convex portion 311 is clamped in the first concave portion 212, along the third direction Y, the outer wall of one side of the second convex portion 311 abuts against the inner wall of the first concave portion 212, and the outer wall of the other side of the second convex portion 311 is exposed to the first connecting member 21, so as to facilitate welding the second convex portion 311 to the first concave portion 212. When the first convex portion 211 is clamped in the second concave portion 312, along the third direction Y, the outer wall of one side of the first convex portion 211 abuts against the inner wall of the second concave portion 312, and the outer wall of the other side of the first convex portion 211 is exposed to the second connecting member 31, so as to facilitate welding the first convex portion 211 to the second concave portion 312.

[0126] It is worth noting that along the third direction Y, the width of the first concave portion 212 is greater than or equal to the width of the second convex portion 311, so that the second convex portion 311 can be completely clamped in the first concave portion 212, ensuring that the second convex portion 311 will not exceed the first concave portion 212 in the third direction Y, thereby improving the aesthetics of the appearance. Along the third direction Y, the width of the second concave portion 312 is greater than or equal to the width of the first convex portion 211, so that the first convex portion 211 can be completely clamped in the second concave portion 312, ensuring that the first convex portion 211 will not exceed the second concave portion 312 in the third direction Y, thereby improving the aesthetics of the appearance.

[0127] Furthermore, a first chamfer R1 is provided at the edge of the notch of the first recess 212, and the right angle side corresponding to the first chamfer R1 is less than 3 mm. The first chamfer R1 provided in the first recess 212 can guide the second convex portion 311 to be clamped in the first recess 212. In addition, the provision of the first chamfer R1 forms a first guide surface M1 on the inner wall of the first recess 212 on one side close to the first convex portion 211, and the first guide surface M1 extends downward and outwardly from the first surface P1, thereby guiding the second convex portion 311 to be clamped in the first recess 212 through the first guide surface M1.

[0128] Correspondingly, the top of the surface of the second convex portion 311 on the side close to the second concave portion 312 is provided with a second chamfer R2, and the shape and size of the second chamfer R2 are adapted to the first chamfer R1. The second chamfer R2 provided on the second convex portion 311 forms a second guide surface M2 on the outer surface of the second convex portion 311 on the side close to the second concave portion 312. The second guide surface M2 extends downward and inwardly from the end thereof away from the second surface P3. In addition, when the second convex portion 311 is clamped in the first concave portion 212, the second guide surface M2 is attached to the first guide surface M1.

[0129] Furthermore, a third chamfer R3 is provided at the edge of the notch of the second recess 312, and the right angle side corresponding to the third chamfer R3 is less than 3 mm. The third chamfer R3 provided in the second recess 312 can guide the first convex portion 211 to be clamped in the second recess 312. In addition, the provision of the third chamfer R3 forms a third guide surface M3 on the inner wall of the second recess 312 on one side close to the second convex portion 311, and the third guide surface M3 extends downward and outwardly from the second surface P3, thereby guiding the first convex portion 211 to be clamped in the second recess 312 through the third guide surface M3.

[0130] Correspondingly, a fourth chamfer R4 is provided at the top of the surface of the first convex portion 211 on the side close to the first concave portion 212, and the shape and size of the fourth chamfer R4 are adapted to the third chamfer R3. The fourth chamfer R4 provided on the first convex portion 211 forms a fourth guide surface M4 on the outer surface of the first convex portion 211 on the side close to the first concave portion 212. The fourth guide surface M4 extends downward and inwardly from the end thereof away from the first surface P1. In addition, when the first convex portion 211 is clamped in the second concave portion 312, the third guide surface M3 is attached to the fourth guide surface M4.

[0131] Please combine again Figure 4 and Figure 7 In one embodiment, the first cover plate 20 is provided with a conductive portion, and the conductive portion is provided on the first connecting member 21. Along the first direction X, the conductive portion is integrally formed at one end of the first surface P1 of the first connecting member 21.

[0132] The conductive part is made of the same material as the first connector 21, and is electrically connected to the first connector 21. The conductive part is used to be electrically connected to a voltage detection unit 60. The voltage detection unit 60 is electrically connected to the conductive part through a conductive wire or a circuit board, so that the voltage detection unit 60 measures the voltage of the battery 200 where the conductive part is currently located.

[0133] In particular, the shape and size of the conductive part are not limited in the present application and can be adaptively selected according to actual design requirements.

[0134] It is understandable that, when other embodiments are adopted, the first cover plate 20 may not be provided with a conductive portion, and the voltage detection unit 60 is directly electrically connected to the first connection member 21 through a conductive wire or a circuit board.

[0135] Please combine again Figures 7 to 10 , and see Figure 2 In one embodiment, the first connection member 21 is provided with a first through hole 213, and the first through hole 213 extends inward from the first surface P1 along the second direction Z to penetrate the first connection member 21. An end of the first pole component 22 away from the housing 10 is at least partially connected to the first through hole 213, and the first pole component 22 is welded to the inner wall of the first through hole 213 by a welding process, so that the first pole component 22 and the first connection member 21 maintain electrical connection.

[0136] Furthermore, the first pole assembly 22 includes a first mounting plate 221, a first conductive member 222, a second mounting plate 223, and a first pole 224. The first mounting plate 221 and the second mounting plate 223 are both made of insulating materials such as plastic, and the first conductive member 222 is made of conductive materials such as aluminum.

[0137] The first pole 224 includes a connecting portion 2241 and a pole portion 2242. The connecting portion 2241 is a sheet-like structure, and the pole portion 2242 is a cylindrical structure. The pole portion 2242 is integrally formed with the connecting portion 2241, and the connecting portion 2241 and the pole portion 2242 are both made of conductive materials such as aluminum. The number of pole portions 2242 is one, two, or three. When the number of pole portions 2242 is two or three, the pole portions 2242 are arranged at intervals along the first direction X.

[0138] Along the second direction Z, the connecting portion 2241, the second mounting plate 223, the first conductive member 222, and the first mounting plate 221 are sequentially arranged, and any two adjacent ones of the connecting portion 2241, the second mounting plate 223, the first conductive member 222, and the first mounting plate 221 are connected to each other. The pole portion 2242 is protrudingly arranged on a side of the connecting portion 2241 close to the second mounting plate 223, and the pole portion 2242 passes through the second mounting plate 223, the first conductive member 222, and the first mounting plate 221 sequentially.

[0139] Specifically, the first mounting plate 221 is provided with a third through hole 2210, the first conductive member 222 is provided with a fourth through hole 2220, and the second mounting plate 223 is provided with a fifth through hole 2230. One end of the pole portion 2242 away from the connecting portion 2241 passes through the fifth through hole 2230, the fourth through hole 2220, and the third through hole 2210 in sequence and then extends into the first through hole 213. The number of the fifth through hole 2230, the fourth through hole 2220, the third through hole 2210, and the first through hole 213 is the same as the number of the pole portion 2242.

[0140] It is worth noting that the pole portion 2242 is riveted into the first through hole 213 after passing through the fifth through hole 2230 , the fourth through hole 2220 , and the third through hole 2210 , and the pole portion 2242 is connected to the inner wall of the first through hole 213 by welding.

[0141] In addition, a mounting groove 2211 is formed on the end surface of the first mounting plate 221 away from the first conductive member 222, and the first connector 21 is clamped in the mounting groove 2211. The second mounting plate 223 is connected to the end of the housing 10 to close the mounting cavity 11. The connecting portion 2241 is located in the mounting cavity 11 and is electrically connected to the battery cell 40.

[0142] Furthermore, the second connecting member 31 is provided with a second through hole 313, and the second through hole 313 extends inwardly from the second surface P3 along the second direction Z to penetrate the second connecting member 31. One end of the second pole component 32 away from the housing 10 is at least partially connected to the second through hole 313, and the second pole component 32 is welded to the inner wall of the second through hole 313 by a welding process, so that the second pole component 32 and the second connecting member 31 are electrically connected.

[0143] The second pole assembly 32 includes a third mounting plate 321, a second conductive member 322, a fourth mounting plate 323, and a second pole 324. Along the second direction Z, the third mounting plate 321, the second conductive member 322, and the fourth mounting plate 323 are sequentially arranged, and the fourth mounting plate 323 is connected to the end of the housing 10 to close the mounting cavity 11. The second connecting member 31 is connected to a side of the third mounting plate 321 away from the fourth mounting plate 323, and the second pole 324 is sequentially penetrated through the fourth mounting plate 323, the second conductive member 322, and the third mounting plate 321.

[0144] The third mounting plate 321, the second conductive member 322, the fourth mounting plate 323, and the second pole 324 have the same structure, material, and principle as the first mounting plate 221, the first conductive member 222, the second mounting plate 223, and the first pole 224 in the first pole assembly 22, and are not described again.

[0145] Please combine again Figures 7 to 11 In one embodiment, the end surface of the first pole 224 away from the second pole 324 is coplanar with the first surface P1, and the end surface of the second pole 324 away from the first pole 224 is coplanar with the second surface P3. When two batteries 200 are arranged along the second direction Z, the first surface P1 of one battery 200 abuts against the second surface P3 of the other battery 200 to form a current channel, and the first pole 224 of one battery 200 abuts against the second pole 324 of the other battery 200 to form a current channel, so that there is a larger contact surface between the two batteries 200 to improve the current transmission efficiency and avoid heating caused by too small a contact area.

[0146] It is understandable that, when other embodiments are adopted, the end surface of the first pole 224 away from the second pole 324 is located in the first through hole 213, and the end surface of the second pole 324 away from the first pole 224 passes through the second through hole 313 and exceeds the second surface P3. The distance between the end surface of the first pole 224 away from the second pole 324 and the first surface P1 is the same as the distance that the end surface of the second pole 324 away from the first pole 224 exceeds the second surface P3, ensuring that when the two batteries 200 are docked, the first pole 224 and the second pole 324 are in abutment.

[0147] like Figure 1 and Figure 2 As shown, the embodiment of the present application further provides a battery 200, which includes the above-mentioned shell 10, the above-mentioned battery cell 40, and the above-mentioned battery cover 100. Along the second direction Z, the first cover 20 and the second cover 30 are respectively connected to the opposite ends of the shell 10 to close the opposite ends of the installation cavity 11.

[0148] The battery 200 provided in the present application has the battery cover 100 , and thus has the advantages of the battery cover 100 of reducing the space occupied by the multiple batteries 200 when spliced ​​together and improving the stability of the multiple batteries 200 when spliced ​​together.

[0149] like Fig.11 As shown, the embodiment of the present application further provides a battery pack 300, comprising at least two of the above-mentioned batteries 200. Along the second direction Z, at least two batteries 200 are arranged in sequence, and at least two batteries 200 are connected to each other. The battery pack 300 includes a box body 50, and a cavity is opened in the box body 50, and a plurality of batteries 200 are arranged in the cavity.

[0150] Furthermore, a plurality of batteries 200 arranged in sequence along the second direction Z constitute a group of batteries 200 , and the battery pack 300 has a plurality of groups of batteries 200 . Along the third direction Y, the plurality of groups of batteries 200 are arranged in parallel, and two adjacent groups of batteries 200 can be electrically connected.

[0151] The battery pack 300 provided in the present application has a plurality of the above-mentioned batteries 200 , and thus has the advantages of the above-mentioned batteries 200 in that the space occupied by the plurality of batteries 200 when spliced ​​is reduced and the stability of the plurality of batteries 200 when spliced ​​is improved.

[0152] In the above, the specific embodiments of the present application are described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and substitutions may be made to the specific embodiments of the present application without departing from the scope of the present application. These changes and substitutions are all within the scope defined by the present application.

Claims

1. A battery cover, characterized in that: The battery cover comprises: A first cover plate, comprising a first pole assembly and a first connector, wherein one end of the first pole assembly is used to be connected to one end of a battery housing, and the other end of the first pole assembly is passed through the first connector, and the first connector is provided with a first convex portion and a first concave portion; A second cover plate includes a second pole assembly and a second connecting member, wherein one end of the second pole assembly is used to be connected to the other end of the housing, the other end of the second pole assembly is passed through the second connecting member, and the second connecting member is provided with a second convex portion and a second concave portion; The second convex portion is used to clamp with the first concave portion of the adjacent battery, and the first convex portion is used to clamp with the second concave portion of the adjacent battery.

2. The battery cover according to claim 1, characterized in that: The first connecting member has a first surface arranged along a first direction, the first convex portion is a protrusion protruding outwardly along a second direction on the first surface, the second direction intersects with the first direction, and the first concave portion is a groove formed by being concave inwardly on the first surface along the second direction; And / or, the second connecting member has a second surface arranged along the first direction, the second protrusion is a protrusion protruding outward from the second surface along the second direction, and the second recess is a groove formed by recessing inward from the second surface along the second direction.

3. The battery cover according to claim 1 or 2, characterized in that: Along the second direction, the ratio of the protruding length of the first protrusion to the thickness of the first connecting member is less than or equal to 3 / 4; along the third direction, the ratio of the width of the first protrusion to the width of the first connecting member is less than or equal to 5 / 24, and the third direction intersects with the second direction; and / or Along the second direction, the ratio of the depth of the first recess to the thickness of the first connecting member is less than or equal to 3 / 4; along the third direction, the ratio of the width of the first recess to the width of the first connecting member is less than or equal to 5 / 24; and / or Along the second direction, the ratio of the protruding length of the second protrusion to the thickness of the second connecting member is less than or equal to 3 / 4; along the third direction, the ratio of the width of the second protrusion to the width of the second connecting member is less than or equal to 5 / 24; and / or Along the second direction, a ratio of the depth of the second recess to the thickness of the second connecting member is less than or equal to 3 / 4; along the third direction, a ratio of the width of the second recess to the width of the second connecting member is less than or equal to 5 / 24.

4. The battery cover according to claim 1 or 2, characterized in that: Along the second direction, the depth of the first concave portion is greater than or equal to the protruding length of the second convex portion; and / or Along a third direction, a width of the first concave portion is greater than or equal to a width of the second convex portion, and the third direction intersects with the second direction; and / or Along the second direction, the depth of the second concave portion is greater than or equal to the protruding length of the first convex portion; and / or Along the third direction, a width of the second concave portion is greater than or equal to a width of the first convex portion.

5. The battery cover as claimed in claim 2, characterized in that: The first convex portion and the first concave portion are arranged on opposite sides of the first surface along a third direction, and the third direction intersects the first direction and the second direction; The second convex portion and the second concave portion are provided on opposite sides of the second surface along the third direction.

6. The battery cover as claimed in claim 1, characterized in that: The first cover plate is provided with a conductive portion, and the conductive portion is provided on the first connecting member and electrically connected to the first connecting member.

7. The battery cover as claimed in claim 1, characterized in that: The first pole assembly comprises a first mounting plate, a first conductive member, a second mounting plate, and a first pole, wherein the first mounting plate, the first conductive member, and the second mounting plate are sequentially arranged along a second direction, the second mounting plate is used to be connected to the housing, the first connecting member is connected to a side of the first mounting plate away from the second mounting plate, and the first pole is sequentially passed through the second mounting plate, the first conductive member, and the first mounting plate; and / or The second pole assembly includes a third mounting plate, a second conductive member, a fourth mounting plate, and a second pole. The third mounting plate, the second conductive member, and the fourth mounting plate are sequentially arranged along the second direction. The fourth mounting plate is used to be connected to the shell. The second connecting member is connected to a side of the third mounting plate away from the fourth mounting plate. The second pole is sequentially passed through the fourth mounting plate, the second conductive member, and the third mounting plate.

8. A battery, characterized in that: It comprises a shell, a battery cell, and a battery cover as described in any one of claims 1 to 7, wherein the shell is provided with an installation cavity, the battery cell is accommodated in the installation cavity, and along the second direction, the first cover plate and the second cover plate are respectively connected to opposite ends of the shell for closing the installation cavity.

9. A battery pack, characterized in that: The method comprises at least two batteries as claimed in claim 8, wherein at least two of the batteries are connected to each other.

10. The battery pack according to claim 9, characterized in that: One of at least two of the batteries is connected to the first recess of an adjacent battery by means of the second protrusion, and is connected to the first protrusion of the adjacent battery by means of the second recess.

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