Battery and electric device

Abstract

The invention relates to the technical field of energy storage devices, and particularly discloses a battery and a power utilization device. The battery comprises a battery cell, a protection plate and a buffer piece, wherein a tab is arranged at the head end of the battery cell; the first side surface of the protection plate faces the head end and is provided with a device, the protection plate is provided with an electric connection part, and the electric connection part is connected with the tab; the buffer piece is arranged between the protection plate and the head end, the buffer piece is provided with an avoiding concave part, and at least part of the device is located in the avoiding concave part. According to the battery and the power utilization device provided by the invention, the buffer part can play a role in buffering and protecting devices on the protection plate, so that the overall impact resistance of the battery is improved. And meanwhile, the protection plate is vertically arranged, the buffer piece is provided with the avoiding concave part, and at least parts and devices are arranged in the avoiding concave part, so that the battery space occupied by the protection plate is effectively reduced, the space utilization rate of the battery in the length direction is improved, and the purpose of improving the battery capacity is further achieved.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and more specifically, to a battery and an electrical device. Background Art

[0002] A battery generally refers to a device that can generate electrical energy. Batteries are used as energy sources because they have stable voltage and current, can provide stable power for a long time, are less affected by the outside world, and are easy to charge and discharge. Therefore, they are usually used to power external devices (such as mobile phones, tablets, laptops and other portable or mobile electronic devices).

[0003] Batteries generally include battery cells and battery protection boards. Battery protection boards are used to connect battery cells to external electronic devices and protect battery cells. With the development of battery cell energy density, the space occupied by battery protection boards leads to increasing capacity loss. How to reduce the space occupied by protection boards in batteries has become a trend to increase battery capacity.

[0004] The battery structure with the protection plate placed vertically is gaining more and more attention because it can improve the battery capacity. Among them, the protection plate usually adopts an integral structure that encapsulates the components, with a large thickness and high finished product. If a conventional protection plate structure with components exposed is adopted, there is a risk of components being damaged by impact after the protection plate is placed vertically, and the structural reliability is low. Summary of the invention

[0005] In view of this, the purpose of the present application is to provide a battery and an electrical device, the structural design of which can effectively solve the problem of poor impact resistance of batteries placed upright with protective plates.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A battery comprising:

[0008] A battery cell, wherein a terminal end of the battery cell is provided with a pole ear;

[0009] A protection plate, wherein a first side surface of the protection plate faces the head end and is provided with a device, and an electrical connection portion is provided on the protection plate, and the electrical connection portion is connected to the pole lug;

[0010] A buffer is arranged between the protection plate and the head end, and the buffer is provided with a position-avoiding recess, and at least part of the device is located in the position-avoiding recess.

[0011] Optionally, in the above battery, the buffer component is provided with the avoidance recesses corresponding to each component having a height greater than a preset height.

[0012] Optionally, in the above-mentioned battery, the buffer component includes an integrated gasket, the gasket is provided with a thinning portion and / or a notch, the thickness of the thinning portion is smaller than the thickness of the main body of the gasket, the thinning portion and the main body of the gasket form the avoidance recess, and the notch forms the avoidance recess.

[0013] Optionally, in the above battery, the buffer member includes a connecting body and a plurality of gasket units, the plurality of gasket units are respectively arranged on the connecting body, and the interval between two adjacent gasket units forms the avoidance recess.

[0014] Optionally, in the above-mentioned battery, the buffer is provided with a mounting hole, a limit member is provided in the mounting hole, the hardness of the limit member is greater than the hardness of the buffer, and the thickness of the buffer is greater than the height of the highest component, wherein the highest component is the component with the highest height on the first side surface.

[0015] Optionally, in the above-mentioned battery, the limit member is opposite to the electrical connection part, and the thickness of the limit member is greater than the height difference between the highest component and the electrical connection part; or, the limit member is opposite to the plate body of the protective plate, and the thickness of the limit member is greater than the height difference between the highest component and the plate body.

[0016] Optionally, the above-mentioned battery further includes a covering, which includes a first section, a second section and a third section connected in sequence, the first section is arranged on the side of the pole ear facing the head end, the third section is arranged on the second side surface, and the part of the second section close to the third section is arranged at the first end of the protective plate, the pole ear includes a bent portion abutting against the part of the second section close to the first section, and the outer surface of the second section does not extend beyond the front side of the battery cell.

[0017] Optionally, in the above battery, the tab includes a tab body and a tab glue portion arranged outside the tab body, the head end of the tab glue portion is located at one end where the tab body is connected to the battery cell body, and the tail end of the tab glue portion is located at the bending portion.

[0018] Optionally, in the above battery, the covering member further comprises:

[0019] a fourth section connected to one end of the third section away from the second section, the fourth section being disposed at the second end of the protection plate and one end of the buffer, the outer surface of the fourth section not exceeding the back side of the battery cell, and the second end of the protection plate being opposite to the first end of the protection plate;

[0020] a fifth section connected to an end of the fourth section away from the third section, the fifth section being disposed on a surface of the buffer member away from the protection plate;

[0021] a sixth section connected to an end of the fifth section away from the fourth section, the sixth section being arranged on a side of the tab away from the head end;

[0022] Wherein, the fifth section and the sixth section are opposite to each other and fixedly connected.

[0023] Optionally, in the above battery, a bonding portion is provided between the first section and the head end.

[0024] Optionally, in the above battery, the width of the second section is consistent with the width of the protective plate, the first section is provided corresponding to each of the pole lugs, each of the first sections is connected to the second section, and the width of the first section is not greater than the width of the pole lug.

[0025] Optionally, in the above battery, the covering member is adhesive tape.

[0026] Optionally, in the above battery, the first end face of the buffer is parallel to the plate body of the protection plate, the second end face of the buffer is parallel to the first end face, or the second end face is inclined from one side close to the bent portion to the other side opposite to the bent portion in a direction away from the protection plate, and the portion of the pole ear extends along the second end face;

[0027] The first end surface is a surface of the buffer component facing the protection plate, and the second end surface is a surface of the buffer component facing away from the protection plate.

[0028] Optionally, in the above battery, an angle between the second end face and the first end face is no greater than 45°.

[0029] The battery provided in the present application includes a battery cell, a protection plate and a buffer. The head end of the battery cell is provided with a pole ear; the first side surface of the protection plate faces the head end and is provided with a device, the protection plate is provided with an electrical connection portion, and the electrical connection portion is connected to the pole ear; the buffer is provided between the protection plate and the head end, the buffer is provided with a position-avoiding recess, and at least part of the device is located in the position-avoiding recess.

[0030] In the battery provided by the present application, the protective plate is placed vertically, and a buffer is arranged in the gap between the protective plate and the battery cell, and the buffering performance of the buffer is utilized to protect the device on the protective plate, thereby improving the overall impact resistance of the battery. At the same time, the protective plate is placed vertically, and a position-avoiding recess is arranged on the buffer, and at least the component device is arranged in the position-avoiding recess, which effectively reduces the battery space occupied by the protective plate. In addition, compared with the overall structure of the device and the protective plate package, the thickness is reduced, thereby improving the space utilization rate of the battery in the length direction, thereby achieving the purpose of increasing the battery capacity. In addition, no need for packaging simplifies the production and preparation process.

[0031] In order to achieve the above purpose, the present application also provides an electrical device, which includes any of the above batteries. Since the above batteries have the above technical effects, the electrical device having the battery should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 This is a schematic diagram of the structure of a battery according to a specific embodiment of the present application;

[0034] Figure 2 for Figure 1 Explosion diagram of

[0035] Figure 3 It is a structural diagram of the protection board;

[0036] Figure 4 A partial cross-sectional schematic diagram of a battery according to a specific embodiment of the present application;

[0037] Figure 5 is a schematic diagram of a first structure of a buffer;

[0038] Figure 6 is a schematic diagram of the second structure of the buffer;

[0039] Figure 7 for Figure 6 Explosion diagram of

[0040] Figure 8 is a third structural schematic diagram of a buffer;

[0041] Fig. 9 for Figure 8 Explosion diagram of

[0042] Fig.10 for Figure 8 AA cross-section diagram of ;

[0043] Fig.11 is a schematic diagram of the position of the bonding part;

[0044] Fig.12 is a schematic diagram of the unfolded structure of the covering part;

[0045] Fig.13 A schematic cross-sectional view of a buffer member;

[0046] Fig.14 This is a back view diagram of the connection between the battery cell and the protection board;

[0047] Fig.15 This is a front view diagram of the connection between the battery cell and the protection board;

[0048] Fig.16 This is a schematic diagram of the back side of the protective plate when it is folded for the first time;

[0049] Fig.17 This is a front view of the protective plate when it is folded for the first time;

[0050] Fig.18 Attach a schematic diagram for the buffer;

[0051] Fig.19 A schematic diagram of the back side of the cover;

[0052] Fig. 20 A schematic front view of the cover;

[0053] Fig.21 A schematic diagram of the back side of the wrapping piece;

[0054] Fig. 22 A front view schematic diagram of the wrapping piece;

[0055] Fig.23 It is a schematic diagram of double-sided tape attachment;

[0056] Fig.24 This is a schematic diagram of the back side of the protective plate after the second folding;

[0057] Fig.25 This is a front view of the protective plate being folded for the second time;

[0058] Fig.26 for Fig.25 AA cross-sectional diagram of ;

[0059] Fig. 27 for Fig.26 A magnified schematic diagram of part A;

[0060] Fig.28 Schematic diagram of the bending of the top seal part.

[0061] Reference numerals:

[0062] 100-battery core; 200-protection plate; 300-buffer; 400-covering; 500-adhesive part; 600-double-sided tape;

[0063] 110-head end; 120-ear; 130-cell body; 140-top seal; 150-front side of the cell; 160-back side of the cell; 170-deep pit; 121-bending part; 122-ear body; 123-ear glue part;

[0064] 210 - first side surface; 220 - device; 230 - electrical connection portion; 240 - board body; 250 - second side surface; 260 - first end; 270 - second end; 221 - highest device; 222 - connector;

[0065] 301-avoiding recess; 310-gasket; 311-thinning portion; 312-notch; 320-connecting body; 330-gasket monomer; 302-mounting hole; 340-limiting member; 350-first end face; 360-second end face;

[0066] 410-first paragraph; 420-second paragraph; 430-third paragraph; 440-fourth paragraph; 450-fifth paragraph; 460-sixth paragraph. DETAILED DESCRIPTION

[0067] The embodiments of the present application disclose a battery and an electrical device, which can improve the battery capacity and the impact resistance of the battery.

[0068] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0069] The battery includes a cell and a protection board. The protection board is used to transfer the cell and the external electronic device, and can protect the cell. For example, when the external power source charges the battery and the battery reaches a saturated state, the internal circuit of the protection board will be automatically cut off, thereby avoiding overcharging. In order to improve the energy density of the battery, the protection board is placed vertically, that is, one side surface of the protection board faces the head end of the cell, specifically, the protection board is parallel to the head end of the cell. In the present application, a buffer is provided between the protection board and the head end of the cell, and the buffer is designed to avoid the position according to the position and height of the device on the protection board. While achieving the buffer protection effect, the space occupied is reduced, so that the cell can have a larger size under the same external dimensions, thereby increasing the capacity of the battery and effectively improving the endurance of the electrical device.

[0070] See also Figure 1-Figure 4In some embodiments, the battery provided in the present application includes a battery cell 100, a protection plate 200 and a buffer 300. Among them, the head end 110 of the battery cell 100 is provided with a pole ear 120. The pole ear 120 can be specifically configured as a positive pole ear and a negative pole ear electrically connected to the battery cell 100. For example, there may be two pole ears 120, one of which is a positive pole ear and the other is a negative pole ear. Alternatively, there may be more than two pole ears 120, for example, the head end 110 of the battery cell 100 is connected to three pole ears 120, one of which is a positive pole ear, and the other two are negative pole ears connected in parallel.

[0071] The first side surface 210 of the protection plate 200 faces the head end 110 and is provided with a device 220. The protection plate 200 is provided with an electrical connection portion 230, and the electrical connection portion 230 is connected to the pole ear 120. For the convenience of explanation, the two opposite side surfaces of the protection plate 200 are respectively recorded as the first side surface 210 and the second side surface 250. The first side surface 210 faces the head end 110 of the battery cell 100, and can be parallel, approximately parallel or substantially parallel to the head end 110 of the battery cell 100, that is, the protection plate 200 is placed vertically. The protection plate 200 is provided with an electrical connection portion 230, and is electrically connected to the pole ear 120. Specifically, the protection plate 200 includes a plate body 240, an electrical connection portion 230 and a device 220. Among them, the plate body 240 is the main structure of the protection plate 200. The plate body 240 can specifically adopt a printed circuit board. For example, the plate body 240 may include a substrate, and the device 220 arranged on the plate body 240 can be electrically connected through the printed circuit on the substrate. The number of electrical connections 230 is set accordingly according to the number of tabs 120. Devices 220 include but are not limited to connectors 222, fuses, and metal oxide semi-field effect transistors. Connector 222 is an electrical connector for electrically connecting the protection board 200 to an external electronic device. The connector 222 is electrically connected to the protection board 200, specifically, through a printed circuit on the substrate. The current of the tab 120 can be connected to the connector 222 through the printed circuit, and then connected to the external electronic device through the connector 222. Exemplarily, the connector 222 can be a flexible circuit board, one end of which is electrically connected to the circuit board, and the other end of the flexible circuit board, i.e., the external connection end, is used to electrically connect to an external electronic device.

[0072] The buffer 300 is arranged between the protection plate 200 and the head end 110, and the buffer 300 is provided with a avoidance recess 301, and at least part of the device 220 is located in the avoidance recess 301. That is, the buffer 300 is arranged in the gap between the protection plate 200 and the head end 110 of the battery cell 100, and the buffer 300 has a buffering effect, and is made of a material or structure that can provide elastic buffering. Exemplarily, the buffer 300 uses a silicone pad or foam. The buffer 300 is provided with an avoidance recess 301 for avoiding the device 220 on the first side surface 210. The avoidance recess 301 is a recessed area on the buffer 300, and its size and shape can be set as needed, and are not specifically limited here. It can be understood that according to the different heights of different devices 220, the avoidance recess 301 can be selectively set for one of the devices 220 or several devices 220.

[0073] In the battery provided by the present application, the protective plate 200 is placed vertically, and a buffer 300 is arranged in the gap between the protective plate 200 and the battery cell 100, and the buffer performance of the buffer 300 is utilized to protect the device 220 on the protective plate 200, thereby improving the overall impact resistance of the battery. At the same time, the protective plate 200 is placed vertically, and a position-avoiding recess 301 is arranged on the buffer 300, and at least the component device 220 is arranged in the position-avoiding recess 301, which effectively reduces the battery space occupied by the protective plate 200. In addition, compared with the overall structure of the device 220 and the protective plate 200 package, the thickness is reduced, thereby improving the space utilization rate of the battery in the length direction, thereby achieving the purpose of increasing the battery capacity. In addition, no need for packaging simplifies the production and preparation process.

[0074] In some specific examples, the electrical connection portion 230 may be a nickel sheet. The nickel sheet and the tab 120 may be welded and fixed by reflow soldering, laser welding, resistance welding, ultrasonic welding, etc. It is understood that an insulating protective layer may be provided at the welding point between the tab 120 and the protection plate 200 to insulate the welding point to avoid a short circuit.

[0075] For some specific examples, see Figure 2The battery cell 100 provided in the present application includes a battery cell body 130 and a pole ear 120 extending from one end of the battery cell body 130, and the end extending from the pole ear 120 is recorded as the head end 110, and the pole ear 120 is electrically connected to the battery cell body 130. Further, the battery cell body 130 also includes a top seal portion 140 provided on the top end surface of the battery cell body 130 and a side seal portion provided on the side end surface of the battery cell body 130, and the top seal portion 140 and the side seal portion play a protective role for the battery cell body 130. In some specific examples, the top seal portion 140 and the side seal portion can be made of aluminum-plastic film material. When the top seal portion 140 is made of aluminum-plastic film material, the bendability of the aluminum-plastic film can be used to bend the top seal portion 140 toward the direction of the battery cell body 130, so that the top seal portion 140 is parallel, approximately parallel, or substantially parallel to the top end surface of the battery cell body 130.

[0076] In some embodiments, the buffer 300 covers each device 220 on the first side surface 210. That is, the size of the buffer 300 can meet the requirements of being disposed between each device 220 on the first side surface 210 and the head end 110 of the battery cell 100, so as to provide buffer protection for each device 220. Exemplarily, the length of the buffer 300 is equal to or slightly less than the length of the protective plate 200, and the width of the buffer 300 is equal to or slightly less than the width of the protective plate 200, so as to provide buffer protection for the protective plate 200 as a whole.

[0077] In some embodiments, each device 220 is disposed on the first side surface 210 of the protective plate 200. It is understood that the connector 222 in the device 220 is disposed on the first side surface 210 means that one end of the connector 222 is connected to the first side surface 210, and the other end of the connector 222 can be bent to the other side of the protective plate 200 to facilitate connection with an external electronic device. When the layout on the protective plate 200 allows, each device 220 is disposed on the first side surface 210, and the buffer 300 can play a buffering and protective role for each device 220 on the protective plate 200, further ensuring the impact resistance of the battery.

[0078] In some embodiments, the buffer 300 is provided with a one-to-one corresponding avoidance recess 301 for each device 220 whose height is greater than the preset height. For devices 220 with a smaller height, the elasticity of the buffer 300 can be used to meet the installation avoidance and buffering requirements. For devices 220 with a larger height, the elasticity of the buffer 300 is not enough to meet the installation avoidance requirements, that is, there will be a gap between the buffer 300 and the plate body 240 of the protective plate 200, and the overall space occupancy is large, which is not conducive to the improvement of battery capacity. Therefore, for the devices 220 with a higher height on the protective plate 200, specifically for the devices 220 with a height greater than the preset height, avoidance recesses 301 are provided on the buffer 300 in a one-to-one corresponding manner. The shapes and recessed depths of the avoidance recesses 301 corresponding to different devices 220 can be the same or different, and can be set according to the corresponding devices 220. As set above, the buffer 300 can better cooperate with the protective plate 200, minimize space occupancy, and ensure effective buffering. It is understandable that the specific value of the preset height can be set according to the elasticity of the buffer 300 and the height of the device 220, and is not specifically limited here.

[0079] In some embodiments, the avoidance recess 301 includes at least one of an avoidance through hole and an avoidance groove, and the avoidance through hole extends along the thickness direction of the buffer 300. It can be understood that the thickness direction of the buffer 300 is the distance direction between the protection plate 200 and the head end 110 of the battery cell 100. According to the height of the device 220, the corresponding avoidance recess 301 can adopt an avoidance through hole, that is, a hole structure that runs through the thickness direction of the buffer 300, or an avoidance groove, that is, a groove structure that does not run through the thickness direction of the buffer 300. In the case where the buffer 300 is provided with a plurality of avoidance recesses 301, each avoidance recess 301 can adopt an avoidance through hole, or adopt an avoidance groove, or some avoidance recesses 301 adopt an avoidance through hole, and some avoidance recesses 301 adopt an avoidance groove. Exemplarily, the avoidance through hole is set on the buffer 300 corresponding to the device 220 with the highest height, and the avoidance groove is set at the part of the connector 222 with a higher glue thickness.

[0080] In some embodiments, see Figure 5The buffer 300 provided in the present application includes an integrated gasket 310, and the gasket 310 is provided with a thinning portion 311 and / or a notch 312. The thickness of the thinning portion 311 is less than the thickness of the main body of the gasket 310. The thinning portion 311 and the main body of the gasket 310 form a position-avoiding recess 301, and the notch 312 forms the position-avoiding recess 301. The buffer 300 adopts an integrated gasket 310, which has a reliable structure and is easy to process. In one way, the gasket 310 is partially thinned, that is, the gasket 310 includes a thinning portion 311 with a thickness less than that of the main body of the gasket 310, to form a position-avoiding groove. In another way, a notch 312 is provided on the gasket 310 to form a position-avoiding through hole. According to specific needs, one or two of the above-mentioned position-avoiding recesses 301 can be selectively provided on the buffer 300.

[0081] In other embodiments, see Figure 6-Figure 7 , this embodiment is different from the above embodiment in that the buffer 300 adopts a split structure, including a connecting body 320 and a plurality of gasket monomers 330, the connecting body 320 plays a role in connecting and integrating the gasket monomers 330, and the plurality of gasket monomers 330 are respectively arranged on the connecting body 320, and the interval between two adjacent gasket monomers 330 forms a avoiding recess 301. That is, at least two gasket monomers 330 are arranged at intervals. It can be understood that the multiple in this application refers to two or more. The number, shape, and size of the gasket monomers 330 can be set as required, and are not specifically limited here. When including multiple gasket monomers 330, the shapes of the multiple gasket monomers 330 can be the same or different. With a combined buffer 300, the shape and combination of the buffer 300 are more diversified. In some specific examples, the gasket monomer 330 can be a silicone pad or foam, etc., and the connecting body 320 can be a double-sided tape 600, such as aramid paper or DuPont paper.

[0082] In some embodiments, see Figure 8-Figure 10, the buffer 300 provided in the present application is provided with a mounting hole 302, a stopper 340 is provided in the mounting hole 302, the hardness of the stopper 340 is greater than the hardness of the buffer 300, and the thickness δ1 of the buffer 300 is greater than the height H of the highest component 221, wherein the highest component 221 is the component 220 with the highest height on the first side surface 210. It should be noted that the thickness of the buffer 300 refers to the thickness of the main part of the buffer 300 except the avoidance recess 301. When the thickness of the main part changes, such as the thickness gradually increases from one end to the other end, the thickness δ1 of the buffer 300 here refers to the thickness of the thinnest position of the main part. When the thickness of the stopper 340 changes, such as the thickness gradually increases from one end to the other end, the thickness δ2 of the stopper 340 here refers to the thickness of the thickest position of the stopper 340, that is, the maximum thickness. In the case where the buffer 300 includes the above-mentioned integrated gasket 310, the thickness of the buffer 300 is the thickness of the gasket 310; in the case where the buffer 300 includes the above-mentioned connecting body 320 and the gasket monomer 330, the thickness of the buffer 300 is the total thickness of the connecting body 320 and the gasket monomer 330. When the buffer 300 is squeezed and impacted, in order to prevent it from being excessively deformed and causing the device 220 to be subjected to impact force, a mounting hole 302 is provided on the buffer 300 for loading a stopper 340. When the buffer 300 is compressed to a certain thickness, the stopper 340 works to prevent the buffer 300 from being further compressed. That is, through the setting of the stopper 340, the compression limit of the buffer 300 is limited, and it is prevented from being over-compressed, so as to avoid the device 220 on the first side surface 210 from being squeezed and impacted. Exemplarily, the thickness δ1 of the buffer 300 is greater than 0.5 cm, and the thickness δ2 of the stopper 340 is greater than 0.3 cm.

[0083] In some embodiments, the stopper 340 is opposite to the electrical connection part 230, and the thickness of the stopper 340 is greater than the height difference between the highest component 221 and the electrical connection part 230. That is, the position of the mounting hole 302 corresponds to the position of the tab 120, the tab 120 corresponds to the position of the electrical connection part 230, and there are no other components 220 around the electrical connection part 230 on the protection plate 200. Therefore, setting the stopper 340 at the above position will not interfere with other components and will not affect other components 220. The thickness of the stopper 340 is greater than the height difference between the highest component 221 and the electrical connection part 230, so that when the buffer 300 is impacted and compressed to the limit thickness, the stopper 340 can ensure that the highest component 221 will not be squeezed and impacted. Specifically, when the buffer 300 is compressed to the point where the limit block comes into effect, the impact force exerted on the protective plate 200 is directly applied to the battery head through the limit block 340. During this process, only the electrical connection part 230 of the protective plate 200 is squeezed, and no other components 220 are squeezed. Therefore, the buffer 300 can protect and buffer the protective plate 200.

[0084] In other embodiments, the stopper 340 is opposite to the plate body 240 of the protection plate 200, and the thickness of the stopper 340 is greater than the height difference between the highest component 221 and the plate body 240. The stopper 340 is arranged opposite to the plate body 240 on the protection plate 200 where no component 220 is arranged, so as to prevent the component 220 from being affected. The arrangement position of the stopper 340 is selected according to the layout of the component 220 on the protection plate 200.

[0085] In some embodiments, see Figure 2-Figure 4 The battery provided in the present application also includes a covering member 400, which includes a first section 410, a second section 420 and a third section 430 connected in sequence, the first section 410 is arranged on the side of the pole ear 120 facing the head end 110, the third section 430 is arranged on the second side surface 250, and the portion of the second section 420 close to the third section 430 is arranged at the first end 260 of the protective plate 200, the pole ear 120 includes a bent portion 121 that abuts against the portion of the second section 420 close to the first section 410, and the outer surface of the second section 420 does not exceed the front side 150 of the battery cell 100. As the battery cell 100 becomes thinner, the battery structure is limited by the minimum width of the top seal groove of the battery cell 100 and cannot be narrowed. The top seal edge after bending is relatively small from the surface of the battery cell 100. Although it can ensure that the tab 120 does not exceed the surface of the battery after bending, that is, it is not too thick, the tab 120 glue is usually unable to be effectively bent during the bending process due to its high hardness, and will still rise above the battery surface, resulting in poor thickness and failure to meet the design specifications. Therefore, in this embodiment, a covering 400 is added to the battery head end 110. Through the setting of the covering 400, it is ensured that during the bending process of the protection plate 200, a force can be applied to the tab body 122 and the tab glue part 123 of the tab 120, so that the tab glue part 123 can also be effectively bent, such as being driven by the covering 400 to bend into a C shape, and will not rise above the battery body 130.

[0086] The covering member 400 is specifically an integrated structure, that is, the first section 410, the second section 420 and the third section 430 are parts at different positions of the covering member 400, and the structure is reliable. As required, the first section 410, the second section 420 and the third section 430 can also be a split structure connected by a conventional fixing method. Since the first section 410 is arranged on the side of the pole ear 120 facing the head end 110, and the third section 430 is arranged on the second side surface 250 of the protective plate 200, when the protective plate 200 is folded, the pole ear 120 is bent accordingly, and due to the force applied to the pole ear 120 by the covering member 400, the pole ear 120 can be bent according to a predetermined angle and path, so that the outer surface of the second section 420 after bending does not exceed the front side 150 of the battery cell 100, that is, it is not too thick. It should be noted that the front 150 and the back 160 of the battery cell 100 refer to the two large opposite surfaces of the battery cell 100. The front 150 and the back 160 are only used to distinguish the relative position relationship between the two, and there is no limitation on the absolute position when the battery is in use. The front 150 of the battery cell 100 is the front of the battery cell body 130, and the back 160 of the battery cell 100 is the back of the battery cell body 130. For example, the cover 400 is attached to the deep pit 170 at the head of the battery cell 100, and the bottom of the cover 400 is aligned with the top seal 140 and wraps the pole ear 120.

[0087] In some embodiments, the tab 120 includes a tab body 122 and a tab glue portion 123 disposed outside the tab body 122, the head end of the tab glue portion 123 is located at one end where the tab body 122 is connected to the battery cell body 130, and the tail end of the tab glue portion 123 is located at the bending portion 121. By setting the cover, the tab glue portion 123 can be bent, and for a battery cell 100 with a smaller thickness, it can also be ensured that the tab 120 is not too thick after being bent.

[0088] In some embodiments, the covering member 400 provided in the present application further includes a fourth section 440, the fourth section 440 is connected to one end of the third section 430 away from the second section 420, the fourth section 440 is provided at the second end 270 of the protection plate 200 and one end of the buffer 300, the outer surface of the fourth section 440 does not exceed the back side 160 of the battery cell 100, and the second end 270 of the protection plate 200 is opposite to the first end 260 of the protection plate 200. Specifically, one end of the buffer 300 is flush with the second end 270 of the protection plate 200. When the covering member 400 is an integrated structure, that is, the third section 430 and the fourth section 440 are parts at different positions of the covering member 400. As required, the third section 430 and the fourth section 440 may also be a split structure connected in a conventional fixing manner. The covering member 400 is wrapped around the first end 260, the second side surface 250 and the second end 270 of the protection plate 200. The longer the covering member 400 is, the more reliable the force applied to the tab 120 during bending is, thereby ensuring effective bending of the tab 120. At the same time, the covering member 400 can protect the protection plate 200 and can integrate the protection plate 200 and the buffer member 300, thereby improving the reliability of the overall structure.

[0089] In some embodiments, the covering member 400 provided in the present application further includes a fifth section 450, which is connected to one end of the fourth section 440 away from the third section 430, and the fifth section 450 is arranged on the surface of the buffer 300 away from the protective plate 200. The surface of the buffer 300 away from the protective plate 200 is the second end surface 360 ​​of the buffer 300. When the covering member 400 is an integrated structure, the fourth section 440 and the fifth section 450 are parts at different positions of the covering member 400. As needed, the fourth section 440 and the fifth section 450 can also be a split structure connected in a conventional fixing manner. The further extension of the length of the covering member 400 makes the force applied to the tab 120 more reliable during bending. At the same time, the covering member 400 can better integrate the protective plate 200 and the buffer 300 into a whole.

[0090] In some embodiments, the covering member 400 provided in the present application further includes a sixth section 460, which is connected to one end of the fifth section 450 away from the fourth section 440, and the sixth section 460 is disposed on the side of the tab 120 away from the head end 110; wherein the fifth section 450 and the sixth section 460 are opposite and fixedly connected. When the covering member 400 is an integrated structure, that is, the fifth section 450 and the sixth section 460 are parts at different positions of the covering member 400. As required, the fifth section 450 and the sixth section 460 may also be a split structure connected in a conventional fixed manner. The sixth section 460 is arranged on the side of the pole lug 120 away from the head end 110, and the two ends of the covering member 400 are respectively connected to the two sides of the pole lug 120, that is, the first section 410 is connected to the side of the pole lug 120 facing the head end 110, and the sixth section 460 is connected to the side of the pole lug 120 away from the head end 110. When bending, the force applied to the pole lug 120 is more stable and reliable. Under the action of the covering member 400, the pole lug 120 is guaranteed to be bent according to a predetermined angle and path. Further, the sixth section 460 is arranged on the side of the pole lug 120 away from the head end 110 and the back of the top seal 140. The fifth section 450 and the sixth section 460 are opposite and fixedly connected, so that the first side surface 210 of the protective plate 200 faces the head end 110 of the battery cell 100 after bending, so that the protective plate 200 is placed upright, and the overall structure of the battery is stable and reliable. Exemplarily, the fifth section 450 and the sixth section 460 are fixed by double-sided tape 600 .

[0091] In some embodiments, see Figure 4 and Fig.11 , a bonding portion 500 is provided between the first section 410 and the head end 110. After being bent into place, the first section 410 and the head end 110 are fixedly connected by the bonding portion 500, so that the overall structure of the battery is stable and reliable, and the protection plate 200 is reliably and stably placed upright. Exemplarily, the bonding portion 500 is a glue dispensing portion. That is, after being bent into place, the first section 410 and the head end 110 are fixedly connected by glue dispensing.

[0092] In some embodiments, see Fig.12 The width of the second section 420 is consistent with the width of the protection plate 200, and the first section 410 is respectively provided corresponding to each pole lug 120, each first section 410 is connected to the second section 420, and the width of the first section 410 is not greater than the width of the pole lug 120. The cover 400 is provided with a protrusion, which is the first section 410 mentioned above. By setting the first section 410 as a protrusion protruding from the second section 420, the first section 410 corresponds to the pole lug 120, so as to apply a force to the pole lug 120, and can avoid the top seal portion 140 at the same time.

[0093] In some embodiments, the covering member 400 is adhesive tape. The adhesive tape can drive the tab 120 to bend, and the adhesive tape can directly bond with the tab 120, the protective plate 200, and the buffer 300, with reliable connection, convenient operation, and simple structure. In other embodiments, the covering member 400 can also be made of other materials such as a film, and can be fixedly connected to the corresponding tab 120, the protective plate 200, or the buffer 300 by adsorption, bonding, etc.

[0094] In some embodiments, see Fig.13 , the first end surface 350 of the buffer 300 is parallel to the plate body 240 of the protection plate 200, the second end surface 360 ​​of the buffer 300 is inclined from one side close to the bending portion 121 to the other side opposite to the direction away from the protection plate 200, and the portion of the pole ear 120 extends along the second end surface 360; wherein, the first end surface 350 is the surface of the buffer 300 facing the protection plate 200, and the second end surface 360 ​​is the surface of the buffer 300 away from the protection plate 200. The second end surface 360 ​​of the buffer 300 is inclined, and the inclination angle of the second end surface 360 ​​is set accordingly according to the matching of the battery cells 100 of different thicknesses and the protection plates 200 of different widths, so as to ensure that the thickness of the battery head does not exceed the thickness of the body.

[0095] Specifically, the angle between the second end face 360 ​​and the first end face 350 is not greater than 45°. As set above, the second end face 360 ​​is inclined relatively large, and while the thickness of the battery head does not exceed the thickness of the body, the buffer 300 occupies a relatively small space in the length direction of the battery, which is beneficial to increase the capacity of the battery.

[0096] In some other embodiments, it may also be configured that the first end surface 350 of the buffer component 300 is parallel to the plate body 240 of the protection plate 200 , and the second end surface 360 ​​of the buffer component 300 is parallel to the first end surface 350 .

[0097] Exemplarily, the cross section of the buffer 300 is trapezoidal, and the two sides of the trapezoid correspond to the first end face 350 and the second end face 360. Fig.13 As shown, a waist of the trapezoid corresponding to the first end face 350 is perpendicular to the upper and lower bases of the trapezoid, and an angle ∠A between a waist of the trapezoid corresponding to the second end face 360 ​​and the lower base is greater than or equal to 45° and less than 90°. When ∠A is 90°, the cross section of the buffer 300 is rectangular.

[0098] In other embodiments, the cross section of the buffer 300 may be rectangular, triangular, concave, elliptical, irregularly curved, etc. The longitudinal section of the buffer 300 may be concave or convex in various shapes, such as rectangular, triangular, concave, elliptical, irregularly curved, etc.

[0099] The present application provides a battery assembly method, comprising the following steps:

[0100] S1: electrically connecting the tab 120 of the battery cell 100 to the electrical connection portion 230 on the protection plate 200 .

[0101] See also Figure 14-15 The electrical connection portion 230 is disposed on a side of the tab 120 facing the back side of the battery cell 100 . Specifically, the electrical connection portion 230 can be welded to the tab 120 .

[0102] S2: folding the protection plate 200 for the first time so that the first side surface 210 of the protection plate 200 faces the back surface 160 of the battery cell 100;

[0103] See also Figure 16-Figure 17 Through the first folding of the protection plate 200 , the electrical connection portion 230 is bent so that the first side surface 210 of the protection plate 200 and the back surface 160 of the battery cell 100 face the same direction.

[0104] S3: attaching the buffer member 300 to the first side surface 210 of the protection plate 200 , and inserting the device 220 on the first side surface 210 into the corresponding avoidance recess 301 .

[0105] See also Fig.18 A buffer member 300 is attached to the first side surface 210 to protect and buffer the device 220 on the protection plate 200 .

[0106] S4: Lay the covering member 400 flat, and connect the first section 410 of the covering member 400 to the side of the tab 120 facing the front side of the battery cell 100 .

[0107] See also Figure 19-20 For example, the covering 400 is attached to the deep pit 170 at the head of the battery cell 100, and the bottom of the first section 410 is aligned with the top seal 140 to wrap the ear glue portion 123 of the ear 120 to ensure that the ear glue portion 123 is bent by the covering 400 during the bending process of the protection plate 200, and the battery cell body 130 will not be lifted.

[0108] S5: Wrap the third section 430 of the covering member 400 on the second side surface 250 of the protection plate 200, wrap the fourth section 440 on the second end 270 of the protection plate 200 and one end of the buffer member 300, wrap the fifth section 450 on the surface of the buffer member 300 away from the protection plate 200, and wrap the sixth section 460 on the side of the tab 120 facing the back of the battery cell 100;

[0109] See also Figure 21-22For example, the covering 400 is wrapped around the protective plate 200 from the second side surface 250 of the protective plate 200 to the back of the battery. Specifically, the sixth section 460 of the covering 400 is wrapped around the side of the tab 120 facing the back of the battery cell 100 and the back of the top seal 140.

[0110] S6: attaching double-sided tape 600 to the surface of the sixth section 460 .

[0111] See also Fig.23 , attach the double-sided tape 600 to the back side of the sixth section 460 .

[0112] S7: Fold the protection plate 200 for the second time, so that the sixth section 460 is opposite to the fifth section 450 and they are bonded together by the double-sided tape 600.

[0113] See also Figure 24-Figure 27 , bend the protection plate 200 to the back of the battery, connect the sixth section 460 with the fifth section 450 through the double-sided adhesive 600, and then fix the protection plate 200 and the buffer 300 to the back of the battery. At this time, the tab glue part 123 is wrapped by the covering member 400 into a corresponding bend, specifically a C-shape, so that the tab 120 glue does not curl up and expose.

[0114] S8 : Folding the top sealing portion 140 so that the first side surface 210 of the protection plate 200 faces the head of the battery cell 100 .

[0115] See also Fig.28 , the protection plate 200 and the top sealing portion 140 of the battery cell 100 are folded counterclockwise, and the first side surface 210 of the protection plate 200 faces the head of the battery cell 100 after folding. Specifically, when the cross section of the buffer 300 is trapezoidal, the protection plate 200 and the top sealing portion 140 of the battery cell 100 are folded counterclockwise at an angle equal to the angle ∠A between one waist and the lower bottom of the trapezoid corresponding to the second end surface 360, and the protection plate 200 is in an upright state after bending.

[0116] S9: applying glue between the sixth section 460 and the battery cell 100 .

[0117] See also Figure 4 and Fig.11 The protection plate 200 is fixed in the current state by dispensing glue between the sixth section 460 and the battery cell 100 .

[0118] Based on the battery provided in the above embodiment, the present application further provides an electric device, which includes any one of the batteries in the above embodiment. Since the electric device uses the battery in the above embodiment, please refer to the above embodiment for the beneficial effects of the electric device.

[0119] It is understandable that the design of the electrical device can be energy storage application or power output, or the two application modes can be compatible, which should all fall within the scope of the description of this application, specifically including but not limited to mobile phones, tablet computers, laptops, etc.

[0120] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0121] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery, characterized in that: include: A battery cell (100), wherein a head end (110) of the battery cell (100) is provided with a pole ear (120); A protection plate (200), wherein a first side surface (210) of the protection plate (200) faces the head end (110) and is provided with a device (220), and an electrical connection portion (230) is provided on the protection plate (200), and the electrical connection portion (230) is connected to the pole lug (120); The buffer component (300) is arranged between the protection plate (200) and the head end (110); the buffer component (300) is provided with a position-avoiding recess (301); at least a part of the device (220) is located in the position-avoiding recess (301).

2. The battery according to claim 1, characterized in that The buffer member (300) corresponds one to one with each device (220) having a height greater than a preset height, and is respectively provided with the avoidance recess (301).

3. The battery according to claim 1, characterized in that The buffer component (300) comprises an integrated gasket (310), the gasket (310) being provided with a thinning portion (311) and / or a notch (312), the thickness of the thinning portion (311) being smaller than the thickness of a main body of the gasket (310), the thinning portion (311) and the main body of the gasket (310) forming the avoidance recess (301), and the notch (312) forming the avoidance recess (301).

4. The battery according to claim 1, characterized in that The buffer component (300) comprises a connecting body (320) and a plurality of gasket monomers (330); the plurality of gasket monomers (330) are respectively arranged on the connecting body (320); and the interval between two adjacent gasket monomers (330) forms the avoidance recess (301).

5. The battery according to claim 1, characterized in that The buffer component (300) is provided with a mounting hole (302), a limiting component (340) is provided in the mounting hole (302), the hardness of the limiting component (340) is greater than the hardness of the buffer component (300), and the thickness of the buffer component (300) is greater than the height of the highest component (221), wherein the highest component (221) is the component (220) with the highest height on the first side surface (210).

6. The battery according to claim 5, characterized in that The limiting member (340) is opposite to the electrical connection portion (230), and the thickness of the limiting member (340) is greater than the height difference between the highest component (221) and the electrical connection portion (230); or, the limiting member (340) is opposite to the plate body (240) of the protection plate (200), and the thickness of the limiting member (340) is greater than the height difference between the highest component (221) and the plate body (240).

7. The battery according to any one of claims 1 to 6, characterized in that: The invention also comprises a covering member (400), wherein the covering member (400) comprises a first section (410), a second section (420) and a third section (430) which are connected in sequence, wherein the first section (410) is arranged on a side of the pole ear (120) facing the head end (110), the third section (430) is arranged on a second side surface (250) of the protection plate (200), a portion of the second section (420) close to the third section (430) is arranged on a first end (260) of the protection plate (200), the pole ear (120) comprises a bent portion (121) abutting against a portion of the second section (420) close to the first section (410), and an outer surface of the second section (420) does not extend beyond the front surface (150) of the battery cell (100).

8. The battery according to claim 7, characterized in that The pole tab (120) comprises a pole tab body (122) and a pole tab adhesive portion (123) arranged outside the pole tab body (122), and the tail end of the pole tab adhesive portion (123) is located at the bending portion (121).

9. The battery according to claim 7, characterized in that The covering member (400) further comprises: a fourth section (440) connected to an end of the third section (430) away from the second section (420), the fourth section (440) being arranged at the second end (270) of the protection plate (200) and one end of the buffer (300), the outer surface of the fourth section (440) not exceeding the back side (160) of the battery cell (100), and the second end (270) of the protection plate (200) being opposite to the first end (260) of the protection plate (200); a fifth section (450), connected to an end of the fourth section (440) away from the third section (430), the fifth section (450) being arranged on a surface of the buffer component (300) away from the protection plate (200); a sixth section (460), connected to an end of the fifth section (450) away from the fourth section (440), the sixth section (460) being arranged on a side of the pole ear (120) away from the head end (110); Wherein, the fifth section (450) and the sixth section (460) are opposite to each other and fixedly connected.

10. The battery according to claim 7, characterized in that A bonding portion (500) is provided between the first section (410) and the head end (110).

11. The battery according to claim 7, characterized in that The width of the second section (420) is consistent with the width of the protection plate (200), and the first section (410) is respectively provided corresponding to each of the pole lugs (120), and each of the first sections (410) is connected to the second section (420), and the width of the first section (410) is not greater than the width of the pole lug (120).

12. The battery according to claim 7, characterized in that The covering piece (400) is adhesive tape.

13. The battery according to claim 7, characterized in that The first end surface (350) of the buffer component (300) is parallel to the plate body (240) of the protection plate (200), the second end surface (360) of the buffer component (300) is parallel to the first end surface (350), or the second end surface (360) is inclined from one side close to the bending portion (121) to the other side opposite thereto in a direction away from the protection plate (200), and a portion of the pole ear (120) extends along the second end surface (360); The first end surface (350) is the surface of the buffer component (300) facing the protection plate (200), and the second end surface (360) is the surface of the buffer component (300) facing away from the protection plate (200).

14. The battery according to claim 13, characterized in that The included angle between the second end surface (360) and the first end surface (350) is no greater than 45°.

15. An electrical device, characterized in that: Comprising a battery as claimed in any one of claims 1 to 14.

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