Collector plate assembly, battery, energy storage device and electric equipment

Abstract

The utility model discloses a collector plate assembly, a battery, an energy storage device and electric equipment. The collector plate assembly comprises a collector plate and an insulating part. The collector plate comprises a body part, a bending part and a connecting part, the body part comprises a first surface and a second surface which are opposite to each other, the bending part bends and extends from the periphery of the body part, and the connecting part protrudes and extends from the first surface to the direction far away from the second surface. The insulating member covers at least a partial region of the bending portion. The collector plate is provided with the bending part which is connected with the body part at the included angle, so that the insulating part can cover at least partial area of the bending part, and the insulating part covers at least partial area of the bending part, so that the bending part cannot be in contact with the shell of the battery, and the collector plate cannot be in contact with the shell; therefore, the space occupied by the insulating part can be reduced while the short circuit of the battery is avoided, so that the manufacturing cost of the insulating part is reduced, the limitation on the design size of the battery core of the battery is small, and the capacity of the battery can be increased accordingly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and more particularly, to a current collector plate assembly, a battery, an energy storage device, and an electric device. BACKGROUND

[0002] A battery generally includes a shell, a battery cell and a current collector plate received in the shell, and an electrode terminal extending out of the shell. The current collector plate is used to electrically connect the tab of the battery cell and the electrode terminal. The current collector plate has a risk of contacting the conductive shell, and once the current collector plate contacts the shell, the battery will be short-circuited. In order to avoid the short circuit caused by the contact between the current collector plate and the shell, the battery generally has an insulating piece arranged on the current collector plate to avoid the contact between the current collector plate and the shell. However, the arrangement of the insulating piece will affect the working performance of the battery. For example, if the volume of the insulating piece is large, the insulating piece will occupy a large space in the battery, and the design size of the battery cell will be squeezed, thereby reducing the capacity of the battery. SUMMARY

[0003] The present application provides a current collector plate assembly, a battery, an energy storage device, and an electric device.

[0004] The current collector plate assembly provided by the present application includes a current collector plate and an insulating piece. The current collector plate includes a body portion and a bent portion, and the bent portion is connected to the body portion at an included angle. The insulating piece covers at least part of the bent portion.

[0005] In some embodiments, the bent portion is arranged at the periphery of the body portion.

[0006] In some embodiments, the body portion includes a first surface and a second surface opposite to each other in a first direction, the bent portion includes a bent sub-portion and an extended sub-portion, the bent sub-portion extends out of the first surface in a direction away from the second surface, and the extended sub-portion extends from the bent sub-portion in a direction away from the center of the current collector plate; and the insulating piece covers the extended sub-portion.

[0007] In some embodiments, the insulating piece covers all the outer surfaces of the extended sub-portion.

[0008] In some embodiments, the extended sub-portion includes a first end surface and a second end surface arranged opposite to each other in the first direction, the second end surface is closer to the second surface in the first direction than the first end surface, the insulating piece includes a first insulating portion, a second insulating portion, and a third insulating portion, the first insulating portion is arranged on the surface of the first end surface away from the second end surface, the second insulating portion is arranged on the surface of the second end surface away from the first end surface, and the third insulating portion is connected between the first insulating portion and the second insulating portion.

[0009] In some embodiments, a surface of the second insulating portion facing away from the second end surface is flush with the second surface of the body portion.

[0010] In some embodiments, a length of the extension portion ranges from 1.00mm to 1.50mm along the central axis of the body portion towards the edge region of the body portion.

[0011] In some embodiments, the body portion comprises a first surface and a second surface facing away from each other along a first direction, and the body portion is provided with a through hole penetrating through the first surface and the second surface.

[0012] In some embodiments, the body portion comprises a first surface and a second surface facing away from each other along a first direction, and the current collector further comprises a connecting portion, the connecting portion is arranged on the first surface and protrudes away from the second surface from the first surface.

[0013] The battery provided by the embodiments of the present application comprises a shell, a battery cell and the current collector assembly of any of the above embodiments. The shell is provided with a receiving cavity. The battery cell is installed in the receiving cavity, and the battery cell comprises an inner lead-out piece. The inner lead-out piece is electrically connected with the body portion.

[0014] In some embodiments, the body portion comprises a first surface and a second surface facing away from each other along a first direction, the body portion is provided with a through hole penetrating through the first surface and the second surface, and the shell is provided with an outer lead-out piece, the outer lead-out piece is electrically connected with the connecting portion.

[0015] In some embodiments, the battery cell further comprises a battery cell body, the battery cell body is connected with the inner lead-out piece, and a gap is formed between the battery cell body and the insulating piece.

[0016] In some embodiments, an end surface of the insulating piece close to the battery cell is in contact with the inner lead-out piece to limit the inner lead-out piece.

[0017] In some embodiments, in a plane perpendicular to the axial direction of the current collector, an edge of a projection of the inner lead-out piece does not exceed an edge of a projection of the insulating piece.

[0018] The present application further provides an energy storage device, which comprises the battery of any of the above embodiments.

[0019] The present application further provides an electric device, which comprises an electric device and the energy storage device of any of the above embodiments. The electric device is electrically connected with the energy storage device.

[0020] In the current collecting plate assembly, battery, energy storage device and electrical equipment of the present application, the current collecting plate is provided with a bent portion connected to the main body at an angle, so that the insulating member can cover at least a portion of the bent portion, and the insulating member covering at least a portion of the bent portion can prevent the bent portion and the battery shell from contacting each other, thereby preventing the current collecting plate and the shell from contacting each other. In this way, while ensuring that the battery will not short-circuit, the space occupied by the insulating member can be reduced to reduce the manufacturing cost of the insulating member, and at the same time, the design size of the battery cell is less restricted, so that the battery capacity can be increased accordingly.

[0021] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic cross-sectional view of a battery according to certain embodiments of the present application;

[0024] Figure 2 yes Figure 1 A partial enlarged schematic diagram of the collecting plate assembly shown;

[0025] Figure 3 is a schematic structural diagram of a current collecting plate assembly according to certain embodiments of the present application;

[0026] Figure 4 yes Figure 3 A perspective schematic diagram of a current collecting plate in the current collecting plate assembly shown;

[0027] Figure 5 is a schematic structural diagram of an energy storage device according to certain embodiments of the present application;

[0028] Figure 6 It is a structural schematic diagram of electrical equipment in certain embodiments of the present application.

[0029] Description of main component symbols:

[0030] 1000. Electrical equipment;

[0031] 100. Energy storage device; 300. Power-consuming device;

[0032] 10. Battery;

[0033] 11, current collector plate assembly; 111, current collector plate; 1111, body portion; 11111, first surface; 11113, second surface; 1113, bent portion; 11131, bent sub-portion; 11133, extended sub-portion; 11134, first end surface; 11135, second end surface; 11136, third end surface; 1115, connecting portion; 1117, positioning hole; 113, insulating member; 1131, first insulating portion; 1133, second insulating portion; 1135, third insulating portion; 115, through hole; 13, housing; 131, accommodating cavity; 133, external lead-out member; 135, housing body; 137, top cover; 15, battery cell; 151, internal lead-out member; 153, battery cell body;

[0034] 17, gap;

[0035] 30, box; 31, first portion; 33, second portion. DETAILED DESCRIPTION

[0036] Embodiments of the present application are described below in detail with reference to the accompanying drawings. In the drawings, the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below are examples for explaining the present application, and are not intended to be limiting of the present application.

[0037] In the description of the present application, it should be understood that the terms "thickness", "upper", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are merely used for the purpose of describing the present 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 limiting the present application. In addition, the terms "first", "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0038] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, and in one example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected, or it can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication or interaction relationship of two elements.

[0039] In embodiments of the present application, "on" or "under" a first feature in relation to a 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. Also, "on", "above" and "over" a first feature in relation to a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. "Under", "below" and "underneath" a first feature in relation to a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] Referring to Figure 1 The battery 10 provided in embodiments of the present application includes a current collector plate assembly 11, a housing 13 and an electrode 15. The housing 13 is provided with a receiving cavity 131. The electrode 15 is installed in the receiving cavity 131, and the electrode 15 includes internal leads 151 (e.g. tabs). The internal leads 151 are electrically connected to the current collector plate assembly 11.

[0041] Specifically, the battery 10 is a device for energy conversion and storage, which can convert chemical energy or physical energy into electrical energy. The battery 10 includes a current collector plate assembly 11, a housing 13 and an electrode 15.

[0042] The housing 13 is a structure having a cavity (i.e. the receiving cavity 131) for receiving other elements of the battery 10. The other elements of the battery 10 can be installed in the housing 13, and the housing 13 can be used to block the other elements of the battery 10 from external forces, so as to prevent the other elements from being easily damaged by external forces, and to prevent foreign matter such as dust from entering the other elements and affecting the normal operation of the other elements. The housing 13 can be mainly made of a metal material such as aluminum or steel, or can be mainly made of a non-metal material such as plastic or glass fiber. In some embodiments, the housing 13 is provided with external leads 133 (e.g. a post). For example, the housing 13 includes a housing body 135 and a top cover assembly located at the top of the housing 13, and the top cover assembly includes a top cover 137 and the external leads 133. The external leads 133 mainly serve the purpose of connecting electrical conduction in the battery 10, and the top cover assembly and the housing body 135 are used to protect the internal structure of the battery 10 from being damaged by external forces.

[0043] The electrode 15 is the most basic component of the battery 10, and is usually an electrochemical device encapsulated in the housing 13. The electrode 15 includes internal leads 151, an electrode body 153 and an electrolyte. During the operation of the battery 10, the electrolyte penetrates into the separator of the electrode body 153 and contacts the positive and negative electrode materials in the electrode body 153 to form an electrochemical reaction, thereby realizing the conversion and storage of electrical energy. The internal leads 151 are connected to the electrode body 153, and the internal leads 151 are conductive bodies for leading the positive and negative electrodes out of the electrode body 153.

[0044] The current collecting plate assembly 11 has a conductive function for connecting the inner lead-out piece 151 and the outer lead-out piece 133, so that the current can flow among the inner lead-out piece 151, the outer lead-out piece 133 and the current collecting plate assembly 11.

[0045] Please refer to Figure 3 and Figure 4 , the current collecting plate assembly 11 includes a current collecting plate 111 and an insulating piece 113. The current collecting plate 111 includes a body part 1111 and a bent part 1113. The bent part 1113 is connected with the body part 1111 at an angle. The insulating piece 113 covers at least part of the bent part 1113.

[0046] Specifically, the current collecting plate 111 is a conductive element, and the main function of the current collecting plate 111 is to concentrate the current, so as to ensure that the current can flow uniformly and stably through each component connected therewith. The current collecting plate 111 includes a body part 1111 and a bent part 1113.

[0047] The body part 1111 includes a first face 11111 and a second face 11113 opposite to each other along the first direction X1. The body part 1111 is connected with the inner lead-out piece 151 and is used for collecting the current of the battery cell 15 of the battery 10. For example, the body part 1111 is provided with a through hole 115, the inner lead-out piece 151 can pass through the body part 1111 through the through hole 115, and is welded with the first face 11111 of the body part 1111, or a welding device can extend into the through hole 115 to weld the inner lead-out piece 151 and the second face 11113 of the body part 1111. In this way, the current can flow between the inner lead-out piece 151 and the body part 1111. The first face 11111 of the body part 1111 can be connected with an external circuit, so that the battery cell 15 and the external circuit can realize the flow of current through the body part 1111. The current of the battery cell 15 can flow to the body part 1111 through the inner lead-out piece 151, and the body part 1111 can deliver the current to the external circuit, so as to complete the discharge of the battery cell 15. Correspondingly, after the external circuit delivers the current to the body part 1111, the current of the body part 1111 flows to the inner lead-out piece 151, and then flows to the battery cell 15, so as to complete the charging of the battery cell 15.

[0048] For example, in some embodiments, the current collector 111 further comprises a connecting portion 1115, which is arranged on the first surface 11111 and protrudes from the first surface 11111 in a direction away from the second surface 11113. The connecting portion 1115 can also be bent, so that the shape of the connecting portion 1115 can be bent according to the internal space of the shell 13, so that the connecting portion 1115 can be electrically connected with the external lead-out piece 133. At this time, one end of the external lead-out piece 133 is connected with the connecting portion 1115, and the other end is connected with the external circuit. In this way, the external lead-out piece 133 can be used to connect the connecting portion 1115 and the external circuit, thereby connecting the battery cell 15 and the external circuit. The current of the battery cell 15 can flow to the body portion 1111 through the internal lead-out piece 151, and the current of the body portion 1111 flows to the connecting portion 1115 and the external lead-out piece 133 in turn, and finally the external lead-out piece 133 can deliver the current to the external circuit, thereby completing the discharge of the battery cell 15. Correspondingly, when the external circuit delivers current to the external lead-out piece 133, the current of the external lead-out piece 133 flows to the connecting portion 1115 and the body portion 1111 in turn, and finally flows to the internal lead-out piece 151 through the body portion 1111, thereby flowing to the battery cell 15 to complete the charging of the battery cell 15.

[0049] The bent portion 1113 is connected with the body portion 1111 at an included angle, which can be an obtuse angle or a right angle, so that the bent portion 1113 extends outward from the body portion 1111, and it can be understood that the bent portion 1113 is located at the edge region of the current collector 111, and the shell 13 surrounds the bent portion 1113, and also allows a certain gap between the bent portion 1113 and the internal lead-out piece 151, so as to ensure that the insulating piece 113 can at least wrap at least part of the bent portion 1113.

[0050] The insulating piece 113 is a device with good electrical insulation performance, for example, the insulating piece 113 can be made of plastic or rubber. The insulating piece 113 wraps at least part of the bent portion 1113, for example, the insulating piece 113 can be a ring structure, and the insulating piece 113 wraps the edge region of the bent portion 1113, or the insulating piece 113 can wrap the entire bent portion 1113, so as to isolate the contact between the bent portion 1113 and the shell 13, so that the bent portion 1113 and the shell 13 cannot be in contact, so that the current collector 111 cannot be in contact with the shell 13, even when the battery 10 is subjected to severe vibration or impact motion, only the insulating piece 113 will be in contact with the shell 13, and the current of the body portion 1111 still cannot flow to the shell 13 through the bent portion 1113, thereby ensuring that the battery 10 will not be short-circuited. It should be noted that the insulating piece 113 and the at least part of the bent portion 1113 wrapped by the insulating piece 113 need to be tightly fitted to ensure that the insulating piece 113 does not shift, thereby ensuring the insulation effect of the insulating piece 113.

[0051] In the process of installing the battery 10, the insulating member 113 is installed on the current collector plate 111 to form the current collector plate assembly 11. The current collector plate 111 is provided with a positioning hole 1117, through which an operating device can be positioned and the current collector plate assembly 11 can be placed on a positioning fixture. Then, the positioning fixture places the battery cell 15 directly below the welding surface of the current collector plate 111, and a cylinder moves to lift the battery cell 15 so that the welding surface of the inner lead-out member 151 is tightly attached to the welding surface of the current collector plate 111. Then, the inner lead-out member 151 and the current collector plate 111 are laser welded to complete the connection of the current collector plate assembly 11 and the battery cell 15. The connection of the current collector plate assembly 11 and the battery cell 15 forms an integrated whole, which can be connected to the shell 13 in various ways. For example, the outer lead-out member 133 is welded to the top cover 137 to form a top cover assembly. After the top cover assembly is formed, the connecting portion 1115 is welded to the outer lead-out member 133. After the welding of the connecting portion 1115 and the outer lead-out member 133 is completed, the shell body 135 is welded to the top cover assembly. Alternatively, the integrated whole formed by the connection of the current collector plate assembly 11 and the battery cell 15 can be placed in the shell body 135, and then the shell body 135 is welded to the top cover assembly. In this way, the assembly of the battery 10 is completed.

[0052] In addition, it should be noted that the battery 10 generally includes electrode terminals (not shown in the figure) that protrude and extend relative to the shell 13. The electrode terminals of the battery 10 can be divided into positive electrode terminals and negative electrode terminals. The current collector plate assembly 11 can be located at one end of the battery 10 close to the positive electrode terminals or at one end of the battery 10 close to the negative electrode terminals.

[0053] The current insulating member generally covers the entire current collector plate to ensure insulation, but this results in a higher manufacturing cost of the insulating member and a larger space occupied by the insulating member, which reduces the design size of the battery cell and thus reduces the battery capacity.

[0054] In the current collector plate assembly 11 of the present application, the current collector plate 111 is provided with a bent portion 1113 connected at an angle to the body portion 1111, so that the insulating member 113 can cover at least part of the bent portion 1113. The covering of at least part of the bent portion 1113 by the insulating member 113 prevents the bent portion 1113 and the shell 13 of the battery 10 from contacting each other, so that the current collector plate 111 and the shell 13 cannot contact each other. In this way, while ensuring that the battery 10 cannot be short-circuited, the space occupied by the insulating member 113 can be reduced to reduce the manufacturing cost of the insulating member 113, and the design size of the battery cell 15 of the battery 10 is less restricted, so that the battery capacity can be increased.

[0055] For a better understanding of the present application, refer to the following Figures 1 to 4In some embodiments, the bending portion 1113 is arranged at the periphery of the body portion 1111, and the bending portion 1113 extends from the periphery of the body portion 1111. It can be understood that the bending portion 1113 is located at the edge region of the current collector 111, and the shell 13 surrounds the bending portion 1113. In this way, when the insulating member 113 covers at least part of the bending portion 1113, the insulating member 113 can isolate the bending portion 1113 from the shell 13, thereby ensuring that the battery 10 does not short circuit.

[0056] Referring to Figures 1 to 4 In some embodiments, the body portion 1111 includes a first face 11111 and a second face 11113 opposite to each other in the first direction X1, and the bending portion 1113 includes a bending sub-portion 11131 and an extension sub-portion 11133. The bending sub-portion 11131 extends from the first face 11111 in a direction away from the second face 11113, and the extension sub-portion 11133 extends from the bending sub-portion 11131 in a direction away from the center of the current collector 111. There is a certain accommodation space between the extension sub-portion 11133 and the inner lead-out member 151 for the installation of the insulating member 113. It can be understood that the extension sub-portion 11133 is located at the edge region of the current collector 111, and the shell 13 surrounds the extension sub-portion 11133. At this time, the insulating member 113 covers at least part of the extension sub-portion 11133, ensuring that the current of the extension sub-portion 11133 cannot be output to the shell 13.

[0057] In one embodiment, the insulating member 113 can cover the entire extension sub-portion 11133, i.e. the insulating member 113 covers all the outer surfaces of the extension sub-portion 11133. For example, the extension sub-portion 11133 includes a first end surface 11134 and a second end surface 11135 arranged opposite to each other in the first direction X1, and the second end surface 11135 is closer to the second surface 11113 in the first direction X1 than the first end surface 11134. It can be understood that the outer surfaces of the extension sub-portion 11133 exposed to the outside environment include the first end surface 11134, the second end surface 11135, and a third end surface 11136 connecting the first end surface 11134 and the second end surface 11135. The insulating member 113 includes a first insulating portion 1131, a second insulating portion 1133, and a third insulating portion 1135. The first insulating portion 1131 is connected to the second insulating portion 1133, and the second insulating portion 1133 is connected to the third insulating portion 1135. The first insulating portion 1131 is arranged on the surface of the first end surface 11134 facing away from the second end surface 11135, the second insulating portion 1133 is arranged on the surface of the second end surface 11135 facing away from the first end surface 11134, and the third insulating portion 1135 is connected between the first insulating portion 1131 and the second insulating portion 1133. In this way, the first insulating portion 1131 covers the outer surface of the first end surface 11134, the second insulating portion 1133 covers the outer surface of the second end surface 11135, and the third insulating portion 1135 covers the outer surface of the third end surface 11136, so that the insulating member 113 covers all the outer surfaces of the extension sub-portion 11133, ensuring the insulation effect of the insulating member 113 on the extension sub-portion 11133, thereby ensuring that the battery 10 will not short circuit.

[0058] In another embodiment, the insulating member 113 can only cover the edge region of the extension sub-portion 11133, for example, the first insulating portion 1131 only covers the partial region of the outer surface of the first end surface 11134 closer to the third end surface 11136, the second insulating portion 1133 only covers the partial region of the outer surface of the second end surface 11135 closer to the third end surface 11136, and the third insulating portion 1135 covers the entire outer surface of the third end surface 11136.

[0059] Of course, the insulating member 113 can also cover both the extension sub-portion 11133 and the bending sub-portion 11131, for example, the insulating member 113 covers the entire extension sub-portion 11133 and covers the edge region of the bending sub-portion 11131, or the insulating member 113 covers the entire extension sub-portion 11133 and the entire bending sub-portion 11131. In this way, at least a partial region of the extension sub-portion 11133 can be embedded in the insulating member 113, so that under the blocking effect of the insulating member 113, it can be ensured that the inner wall of the shell 13 will not be in direct contact with the current collector plate 111, thereby achieving the insulation effect, thereby ensuring that the battery 10 will not short circuit.

[0060] Meanwhile, along the height direction of the current collecting plate 111, the body part 1111 is closer to the battery cell 15 than the extension sub-part 11133, and there is a certain accommodation space between the extension sub-part 11133 and the inner lead-out piece 151, so that after the insulating piece 113 covers the extension sub-part 11133, the distance between the body part 1111 and the battery cell 15 will not be increased due to the covering of the insulating piece 113, and the situation that the distance between the body part 1111 and the battery cell 15 is too far and the inner lead-out piece 151 needs to be extended for a long distance to be connected with the body part 1111 will be avoided, so that the use of the inner lead-out piece 151 is reduced to save the manufacturing cost of the current collecting plate assembly 11 while ensuring the smooth connection between the inner lead-out piece 151 and the body part 1111.

[0061] Please refer to Figure 1 and Figure 2 In some embodiments, the surface of the second insulating part 1133 away from the second end surface 11135 is flush with the second surface 11113 of the body part 1111. It can be understood that the surface of the second insulating part 1133 away from the second end surface 11135 is the surface of the insulating piece 113 that contacts the battery cell 15, and the surface of the second insulating part 1133 away from the second end surface 11135 is located on the same horizontal line as the second surface 11113 of the body part 1111, so as to ensure that the surface of the second insulating part 1133 away from the second end surface 11135 will not protrude from the second surface 11113 of the body part 1111, thereby ensuring that the insulating piece 113 will not hinder the connection between the body part 1111 and the inner lead-out piece 151, and facilitating the connection between the current collecting plate 111 and the inner lead-out piece 131.

[0062] Please refer to Figure 1 and Figure 3 In some embodiments, along the direction from the center of the body part 1111 to the edge of the body part 1111 (i.e., X2 in Figure 3 , the length (i.e., L1 in Figure 3 ) of the extension sub-part 11133 is in the range of [1.00mm, 1.50mm], for example, the length of the extension sub-part 11133 is 1.00mm, 1.12mm, 1.18mm, 1.25mm, 1.29mm, 1.33mm, 1.37mm, 1.41mm, 1.48mm and 1.50mm. In the case where the length is less than 1.00mm, the processing difficulty of the bending part 1113 is greater, and in the case where the length is greater than 1.50mm, the bending part 1113 will occupy the space required by the welding area. Therefore, the length of the extension sub-part 11133 is in the range of [1.00mm, 1.50mm], which can on the one hand ensure that the processing difficulty of the bending part 1113 is smaller, and on the other hand ensure that there is enough space for the welding area.

[0063] Please refer to Figure 1 andFigure 4 In some embodiments, the body portion 1111 includes a first face 11111 and a second face 11113 opposite to each other along the first direction X1, and the body portion 1111 is provided with a through hole 115 penetrating through the first face 11111 and the second face 11113. For example, the through hole 115 is arranged in the body portion 1111, and the inner lead-out piece 151 can pass through the through hole 115 to pass through the body portion 1111 and be connected to the first face 11111 of the body portion 1111, or a welding device can be inserted into the through hole 115 so that the welding device can weld the inner lead-out piece 151 to the second face 11113 of the body portion 1111. In this way, the through hole 115 can ensure smooth connection between the body portion 1111 and the inner lead-out piece 151, thereby ensuring that the current can be transmitted between the inner lead-out piece 151 and the current collector plate 111.

[0064] For example, when the inner lead-out piece 151 is connected to the current collector plate 111, the inner lead-out piece 151 extends along the axial direction of the current collector plate 111, and after passing through the through hole 115, the inner lead-out piece 151 can continue to extend for a distance and then be bent towards the direction in which the first face 11111 of the current collector plate 111 is located, so that the inner lead-out piece 151 is attached to the first face 11111. Subsequently, the inner lead-out piece 151 is physically and electrically connected to the first face 11111 by welding. After the inner lead-out piece 151 and the first face 11111 are welded, the current of the inner lead-out piece 151 can flow to the first face 11111. At this time, the connecting portion 1115 can deliver the current of the body to the outside of the current collector plate assembly 11, thereby completing the delivery of the electric energy. The connecting portion 1115 can also deliver the electric energy from the outside to the inner lead-out piece 151, and then deliver the electric energy to the battery cell 15 through the inner lead-out piece 151, thereby achieving the charging of the battery cell 15.

[0065] It should be noted that the number of through holes 115 is not limited and can be one, two or more. Correspondingly, the number of inner lead-out pieces 151 on one side of the battery cell 15 can be one, two or more, as long as they are arranged correspondingly to the through holes 115. In addition, it should be noted that the inner lead-out pieces 151 on one side of the battery cell 15 can be positive inner lead-out pieces 151 or negative inner lead-out pieces 151. For example, when the inner lead-out pieces 151 on one side of the battery cell 15 include three inner lead-out pieces 151, the three inner lead-out pieces 151 can all be positive inner lead-out pieces 151 or all be negative inner lead-out pieces 151. In addition, the through holes 115 can be crescent-shaped, square-shaped, circular-shaped, oval-shaped or track-shaped, and the shapes of different through holes 115 can be the same or different. For example, when the number of through holes 115 is two, the two through holes 115 can both be circular-shaped, or one through hole 115 can be square-shaped and the other through hole 115 can be circular-shaped.

[0066] Please refer to Figure 1In some embodiments, the electric cell 15 further comprises an electric cell body 153, which is connected with the inner lead-out piece 151, so that the electric cell body 153 can realize the flow of electric current through the inner lead-out piece 151 and the current collector plate assembly 11. The electric cell body 153 and the insulating piece 113 have a gap 17 therebetween. Specifically, in a plane perpendicular to the axis of the current collector plate 111, the projection of the electric cell body 153 has a range smaller than that of the projection of the insulating piece 113, so that there is a gap 17 between the electric cell body 153 and the insulating piece 113, through which the electrolyte can flow smoothly to the inside of the electric cell body 153, facilitating the absorption of the electrolyte and thus accelerating the soaking speed of the electrolyte.

[0067] Referring to Figure 1 In some embodiments, the end surface of the insulating piece 113 close to the electric cell 15 is in contact with the inner lead-out piece 151 to limit the inner lead-out piece 151. Specifically, the end surface of the electric cell body 153 close to the insulating piece 113 can be a plane, and the end surface of the insulating piece 113 close to the electric cell 15 can also be a plane. The distance between the extension sub-portion 11133 of the bent portion 1113 and the inner lead-out piece 151 can be set according to the thickness of the insulating piece 113, so that after the insulating piece 113 wraps the extension sub-portion 11133, the end surface of the insulating piece 113 close to the electric cell 15 just abuts against the inner lead-out piece 151. In this way, the end surface of the insulating piece 113 close to the electric cell 15 can jointly limit the inner lead-out piece 151 with the body of the electric cell 15 to limit the movement of the inner lead-out piece 151 in the axial direction of the current collector plate 111, so as to avoid the movement of the inner lead-out piece 151 in the case of violent vibration or impact movement of the battery 10, thereby ensuring the working effect of the inner lead-out piece 151.

[0068] Referring to Figure 1 In some embodiments, in a plane perpendicular to the axial direction of the current collector plate 111, the edge of the projection of the inner lead-out piece 151 does not exceed the edge of the projection of the insulating piece 113, so that the distance D1 between the edge of the insulating piece 113 and the shell 13 is smaller than the distance D2 between the edge of the inner lead-out piece 151 and the shell 13. In this way, even in the case of violent vibration or impact movement of the battery 10, only the case of direct contact between the insulating piece 113 and the shell 13 exists. After the direct contact between the insulating piece 113 and the shell 13, since there is a certain distance between the edge of the inner lead-out piece 151 and the shell 13 in the plane perpendicular to the axial direction of the current collector plate 111, the inner lead-out piece 151 can avoid direct contact with the shell 13, thereby preventing the short circuit of the battery 10.

[0069] In the current application, the current collector plate 111 is provided with a bending portion 1113 extending from the periphery of the body portion 1111, and the insulating member 113 covers at least part of the bending portion 1113, so that the bending portion 1113 and the shell 13 of the battery 10 cannot contact each other, and the current collector plate 111 and the shell 13 cannot contact each other. In this way, the short circuit of the battery 10 can be prevented, and the space occupied by the insulating member 113 can be reduced, so that the manufacturing cost of the insulating member 113 can be reduced, and the design size of the battery cell 15 of the battery 10 is less limited, so that the battery capacity can be increased.

[0070] Referring to Figure 1 and Figure 5 The energy storage device 100 provided by the current application includes the battery 10 of any of the above embodiments.

[0071] Specifically, the energy storage device 100 includes the battery 10 and the box 30, and the battery 10 is contained in the box 30. The box 30 is used to provide a containing space for the battery 10, and the box 30 can have various structures. In some embodiments, the box 30 can include a first part 31 and a second part 33, and the first part 31 and the second part 33 are overlapped with each other, and the first part 31 and the second part 33 together define a containing space for containing the battery 10. The second part 33 can be a hollow structure with one end open, and the first part 31 can be a plate structure, and the first part 31 is overlapped with the open side of the second part 33, so that the first part 31 and the second part 33 together define the containing space; the first part 31 and the second part 33 can also be hollow structures with one side open, and the open side of the first part 31 is overlapped with the open side of the second part 33. Of course, the box 30 formed by the first part 31 and the second part 33 can have various shapes, such as a cylinder or a cuboid.

[0072] In the energy storage device 100, the battery 10 can be multiple, and the multiple batteries 10 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that the multiple batteries 10 are connected in series and in parallel. The multiple batteries 10 can be directly connected in series, in parallel, or in a mixed manner, and the whole of the multiple batteries 10 is contained in the box 30; of course, the energy storage device 100 can also be that the multiple batteries 10 are connected in series, in parallel, or in a mixed manner to form a module, and the multiple modules are connected in series, in parallel, or in a mixed manner to form a whole, and the whole is contained in the box 30. The energy storage device 100 can also include other structures, for example, the energy storage device 100 can also include a current collecting component for realizing the electrical connection between the multiple batteries 10.

[0073] In the energy storage device 100 of the embodiments, the current collector 111 of the current collector assembly 11 of the battery 10 is provided with a bending portion 1113 extending from the periphery of the body portion 1111, so that the insulating member 113 covers at least part of the bending portion 1113, so that the bending portion 1113 and the shell 13 of the battery 10 cannot be in contact, so that the current collector 111 and the shell 13 cannot be in contact. In this way, while ensuring that the battery 10 cannot be short-circuited, the space occupied by the insulating member 113 can be reduced, thereby reducing the manufacturing cost of the insulating member 113, while the design size of the battery cell 15 of the battery 10 is less limited, thereby increasing the battery capacity.

[0074] Please refer to Figure 1 , Figure 5 and Figure 6 , the power consuming device 1000 provided by the embodiments includes the energy storage device 100 of any of the above embodiments and the power consuming device 300, and the power consuming device 300 is electrically connected to the energy storage device 100.

[0075] Specifically, the power consuming device 300 refers to a device and apparatus that works or provides necessary functions using electrical energy, and the power consuming device 300 is electrically connected to the energy storage device 100, and the power consuming device 300 can work using the electrical energy delivered by the energy storage device 100.

[0076] The battery 10 disclosed in the present application can be used in a power consuming device 1000 using the energy storage device 100 as a power source or a variety of energy storage systems using the energy storage device 100 as an energy storage element. The power consuming device 1000 can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship or a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc., and the spacecraft can include airplanes (including drones), rockets, space shuttles, and spacecraft, etc.

[0077] The present application only takes the power consuming device 1000 as an example of a vehicle. The power consuming device 1000 can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or an extended range car, etc. The energy storage device 100 is arranged inside the power consuming device 1000, and the energy storage device 100 can be arranged at the bottom, the head or the tail of the power consuming device 1000. The energy storage device 100 can be used for power supply of the power consuming device 1000, for example, the energy storage device 100 can be used as the operating power source of the power consuming device 1000. The power consuming device 300 can include a controller and a motor, and the controller is used to control the energy storage device 100 to supply power to the motor, for example, for the working power demand of the vehicle during starting, navigation and driving.

[0078] In some embodiments of the present application, the energy storage device 100 can not only serve as the operating power supply of the electric device 1000, but also serve as the driving power supply of the electric device 1000, replacing or partially replacing the fuel or natural gas to provide driving power for the electric device 1000.

[0079] In the electric device 1000 of the embodiments of the present application, the current collector 111 of the current collector assembly 11 of the battery 10 of the energy storage device 100 is provided with the bending portion 1113 extending from the periphery of the body portion 1111, so that the insulating member 113 can cover at least part of the bending portion 1113, so that the bending portion 1113 and the shell 13 of the battery 10 cannot be in contact, so that the current collector 111 and the shell 13 cannot be in contact. In this way, while ensuring that the battery 10 cannot be short-circuited, the space occupied by the insulating member 113 can be reduced, so as to reduce the manufacturing cost of the insulating member 113, and at the same time, the design size of the battery cell 15 of the battery 10 is less limited, so that the battery capacity can be increased.

[0080] In the description of the present application, the description of the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present description, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0081] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, unless otherwise specifically limited.

[0082] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A collecting plate assembly, characterized in that: include: A current collecting plate, the current collecting plate comprising a main body and a bent portion, the bent portion being connected to the main body at an angle; An insulating member covers at least a portion of the bent portion.

2. The collecting plate assembly according to claim 1, characterized in that: The bending portion is arranged on the periphery of the main body portion.

3. The collecting plate assembly according to claim 1, characterized in that: The main body portion includes a first surface and a second surface opposite to each other along a first direction, the bending portion includes a bending sub-portion and an extending sub-portion, the bending sub-portion protrudes and extends from the first surface toward a direction away from the second surface, and the extending sub-portion extends from the bending sub-portion toward a direction away from the center of the collecting plate; the insulating member covers the extending sub-portion.

4. The collecting plate assembly according to claim 3, characterized in that: The insulating member covers all outer surfaces of the extension sub-portion.

5. The collecting plate assembly according to claim 4, characterized in that: The extension sub-portion includes a first end face and a second end face arranged opposite to each other along the first direction, and relative to the first end face, the second end face is closer to the second face in the first direction. The insulating member includes a first insulating portion, a second insulating portion and a third insulating portion. The first insulating portion is arranged on a surface of the first end face facing away from the second end face, the second insulating portion is arranged on a surface of the second end face facing away from the first end face, and the third insulating portion is connected between the first insulating portion and the second insulating portion.

6. The collecting plate assembly according to claim 5, characterized in that: A surface of the second insulating portion facing away from the second end surface is flush with the second surface of the main body.

7. The collecting plate assembly according to claim 3, characterized in that: Along the central axis of the main body toward the edge area of ​​the main body, the length of the extension sub-portion ranges from [1.00 mm to 1.50 mm].

8. The collecting plate assembly according to claim 1, characterized in that: The main body portion includes a first surface and a second surface opposite to each other along a first direction, and the main body portion is provided with a through hole penetrating the first surface and the second surface.

9. The collecting plate assembly according to claim 1, characterized in that: The main body includes a first surface and a second surface opposite to each other along a first direction. The collecting plate further includes a connecting portion, which is disposed on the first surface and protrudes from the first surface in a direction away from the second surface.

10. A battery, characterized in that: include: A housing, wherein the housing is provided with a receiving cavity; A battery core, the battery core being installed in the receiving cavity, the battery core comprising an inner lead-out member; and The current collecting plate assembly according to any one of claims 1 to 9, wherein the inner lead-out member is electrically connected to the current collecting plate.

11. The battery according to claim 10, characterized in that The collecting disc assembly is the collecting disc assembly according to claim 7, and the shell is provided with an external lead-out member, and the external lead-out member is electrically connected to the connecting portion.

12. The battery according to claim 10, characterized in that The battery cell further includes a battery cell body, which is connected to the inner lead-out member, and a gap is provided between the battery cell body and the insulating member.

13. The battery according to claim 10, characterized in that The end surface of the insulating member close to the battery core contacts the inner lead-out member to limit the inner lead-out member.

14. The battery according to claim 10, characterized in that In a plane perpendicular to the axial direction of the collecting disk, the edge of the projection of the inner lead-out member does not exceed the edge of the projection of the insulating member.

15. An energy storage device, characterized in that: include: The battery according to any one of claims 10 to 14.

16. An electrical device, characterized in that: include: The energy storage device according to claim 15, and An electrical device is electrically connected to the energy storage device.

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