CN218385306U

CN218385306U - Battery with a battery cell

Info

Publication number: CN218385306U
Application number: CN202220279027.9U
Authority: CN
Inventors: 王燕青; 宗彦震; 罗自皓
Original assignee: Zhuhai Cosmx Power Co Ltd
Current assignee: Zhuhai Cosmx Power Co Ltd
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2023-01-24
Anticipated expiration: 2032-02-10

Abstract

The application provides a battery, which comprises a battery cell, wherein the battery cell comprises a battery cell body and a lug extending from the battery cell body; the shell is positioned at the periphery of the battery cell, a top sealing edge, a side sealing edge and at least one protruding part are formed at the edge of the battery cell body of the shell, the top sealing edge is bent towards the top end face, the top end face is an end face along the height direction of the battery cell body, and the protruding part is positioned between the top sealing edge and the side sealing edge and extends towards the top end face; the protection plate is positioned on one side, away from the top end face, of the top seal edge and comprises a first area and a second area, and the height of the second area is larger than that of the first area; the second area is connected with the pole lug, and the second area is arranged along the width direction of the battery cell body and in a staggered mode with the protruding part. According to the battery that this application provided has shortened the length of walking the line in the protection shield to can effectively reduce the resistance of protection shield, reduce the consumption of protection shield, promote the utilization ratio of battery power, and then can promote the duration of battery.

Description

Battery with a battery cell

Technical Field

The application relates to the technical field of energy storage devices, in particular to a battery.

Background

A battery is a device that stores electrical energy and supplies power to an external device (e.g., a portable or mobile electronic device such as a mobile phone, a tablet computer, a notebook computer, a personal digital assistant, etc.) at a desired time.

The battery generally includes a battery cell, a casing located at the periphery of the battery cell, a protection plate electrically connected to a tab of the battery cell, and an insulating adhesive tape. The protection board may specifically be a Printed Circuit Board (PCB), and the PCB is provided with a plurality of electronic components. The main effect of protection shield is used for switching electric core and outside electronic equipment, can cross and play the guard action to electric core.

However, in the related art, the space size of the protection plate is large, which results in large resistance of the protection plate and high power consumption, and is not favorable for charging and discharging the battery and fully utilizing the battery capacity.

SUMMERY OF THE UTILITY MODEL

The application provides a battery to at least, solve the problem that the big consumption of resistance of protection plate is high in the correlation technique, can effectively promote the electric quantity utilization ratio of battery.

An embodiment of the present application provides a battery, including:

the battery cell comprises a battery cell body and a lug extending from the battery cell body;

the shell is positioned at the periphery of the battery cell, a top sealing edge, a side sealing edge and at least one protruding part are formed at the edge of the battery cell body of the shell, the top sealing edge is bent towards the top end face, the top end face is an end face along the height direction of the battery cell body, and the protruding part is positioned between the top sealing edge and the side sealing edge and extends towards the top end face;

the protection plate is positioned on one side, away from the top end face, of the top seal edge and comprises a first area and a second area, and the height of the second area is larger than that of the first area; the second area is connected with the pole lug, and the second area is arranged along the width direction of the battery cell body and in a staggered mode with the protruding part.

In a possible implementation, the first region is arranged opposite the projection.

In one possible implementation, the protective plate includes a substrate and an encapsulation layer; in the second area, a plurality of electronic elements are arranged on the substrate, and the packaging layer covers the plurality of electronic elements.

In a possible implementation, the height of the second region protruding from the first region is 0.8-2.0mm.

In one possible implementation, the second region includes a first end and a second end along the length direction; the distance between the first end and the end of the first area facing away from the second area is 2-15mm.

In a possible implementation the height of the first area is 0.6-1.5mm and/or the height of the second area is 1.4-3.5mm.

In a possible implementation, the encapsulation layer of the protection plate faces the top edge seal, and the first region covers the protrusion, or the first region abuts against the protrusion.

In one possible implementation, the projection includes a first bending section and a second bending section;

the first bending section is attached to the top sealing edge, the second bending section is located on one side, back to the top sealing edge, of the first bending section, and the first area covers the second bending section.

In one possible implementation, the projection includes a first portion, a second portion, and a third portion;

the first part is connected with the side sealing edge, the second part is connected with the first part and is bent towards the top end face, and the third part is positioned on one side of the second part, which is back to the first part, and is connected with the top sealing edge.

In a possible implementation, the height of the protrusion is less than or equal to the height of the second region protruding from the first region.

In a feasible implementation manner, the packaging layer of the protection board is arranged opposite to the top sealing edge, and the protruding part is bent and arranged at one side of the first area of the protection board, which is far away from the top sealing edge.

In a possible embodiment, the first region is connected to the projection via a first insulating layer.

In one possible implementation, the number of the protruding parts is two, and the two protruding parts are respectively positioned at two ends of the top end surface along the width direction;

the second region is located between the two projections.

In a possible implementation, the projection of the protective plate and/or the tab onto the plane of the tip end face lies in the tip end face.

In a feasible implementation manner, the tab comprises a first connecting section and a second connecting section, the second connecting section is connected with the battery cell body through the first connecting section, at least part of the first connecting section is located in the top sealing edge, and the second connecting section is used for being connected with the protection plate.

In a feasible implementation manner, the battery cell body comprises a first surface and a second surface which are opposite to each other in the thickness direction, and the top sealing edge is bent towards the first surface;

the distance between one side of the first connecting section close to the first surface and the first surface is greater than or equal to 0.2mm; alternatively, the distance between the side of the first connecting section close to the second surface and the second surface is greater than or equal to 0.2mm.

In a feasible implementation manner, the second connection section is located between the protection plate and the battery cell body, or the second connection section is located on a side of the protection plate, which faces away from the battery cell body.

In a feasible implementation manner, the second connecting section is located between the protection plate and the cell body, a second insulating layer is arranged between the second connecting section and the top sealing edge, at least part of the second connecting section is attached to the outer surface of the top sealing edge through the second insulating layer, and at least a second region in the protection plate is attached to the second insulating layer.

In a feasible implementation manner, a third insulating layer is attached to one side of the protection board, which faces away from the battery cell body, at least part of the third insulating layer covers the protection board, and the other part of the third insulating layer is connected with the battery cell body to fix the protection board.

In one possible implementation, the battery further includes a temperature sensor electrically connected to the protection board;

a temperature sensing probe of the temperature sensor is positioned between the first area and the top seal edge; alternatively, the temperature sensing probe is disposed adjacent to the projection.

According to the battery provided by the embodiment of the application, the protection plate is arranged to comprise the first area and the second area, and the height of the second area is arranged to be larger than that of the first area, for example, a plurality of components can be intensively arranged in one area of the protection plate to form the second area with larger height, so that the thickness of other areas such as the first area can be thinned during manufacturing, the space size of the protection plate is reduced, and the length of wiring in the protection plate is shortened. Compared with the prior art, the resistance of the protection board can be effectively reduced, the power consumption of the protection board is reduced, the utilization rate of the electric quantity of the battery is improved, and the cruising ability of the battery can be improved. In addition, through set up the bulge between the top contained side and the side contained side at the casing, and with the great second region of height and the dislocation set of bulge on the width direction of electricity core body on the protection shield, on the one hand, can rationally utilize the space of other regions beyond the bulge on the face of electricity core top, avoid the second region of protection shield to additionally occupy the high space of electricity core and increase the height of battery, thereby the height dimension of battery has been reduced, thereby can increase the energy density of electricity core when setting up, on the other hand, the distance between the second region of protection shield and the electricity core has been reduced, thereby the length that is used for electrically connecting the utmost point ear of second region and electricity core has been reduced, make resistance and the consumption between the second region of protection shield and the electricity core reduce, more do benefit to the charge-discharge of battery and the make full use of battery electric quantity.

Advantages of additional aspects of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is an exploded schematic view of an electronic device provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a battery provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a cell and a casing in a battery provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of matching between a battery cell and a casing in a battery provided by an embodiment of the present application;

fig. 5 is a schematic structural diagram of matching between a battery cell and a casing in a battery provided by an embodiment of the present application;

FIG. 6 is an enlarged partial schematic view at A of FIG. 5;

fig. 7 is a top view of a protection plate provided in an embodiment of the present application;

fig. 8 is a side view of a protective plate provided in an embodiment of the present application;

fig. 9 is another plan view of a protection plate provided in an embodiment of the present application;

FIG. 10 is another side view of a protective plate provided in an embodiment of the present application;

FIG. 11 is an enlarged partial view at B in FIG. 2;

fig. 12 is a partially enlarged view of a projection provided on a case in a battery according to an embodiment of the present application;

fig. 13 is another enlarged partial view of a projection provided on a case in a battery according to an embodiment of the present application;

fig. 14 is a partial enlarged view of a projection provided on a case in a battery according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of connection between a protection plate and a tab in a battery provided by an embodiment of the application;

fig. 16 is another schematic structural diagram of the connection of the protection plate and the tab in the battery provided by the embodiment of the present application;

fig. 17 is a schematic view of another structure of connection between a protection plate and a tab in a battery provided by an embodiment of the present application;

fig. 18 is a schematic view of another structure of the connection between the protection plate and the tab in the battery provided by the embodiment of the present application;

fig. 19 is a schematic structural diagram of a cell and a casing in a battery provided by an embodiment of the present application;

fig. 20 is a schematic view of another structure of a battery provided in an embodiment of the present application;

fig. 21 is a partial schematic view at C in fig. 2.

Description of reference numerals:

10-an electronic device;

100-a display screen; 200-a housing; 300-a battery;

300 a-electric core; 310-a cell body; 320-pole ear; 330-protective plate; 340-a housing; 350-a second insulating layer; 360-a third insulating layer; 370-a temperature sensor; 380-a flexible circuit board;

311-top end face; 312-side end faces; 321-a first connecting section; 322-a second connection segment; 330 a-a first region; 330 b-a second region; 331-a substrate; 332-an encapsulation layer; 333-nickel plate; 341-a projection; 342-a recessed position; 343-top edge sealing; 344-side edge sealing; 345-an extension; 350 a-compressible media;

3311-electronic component; 3411-a first bend section; 3412-a second bend section; 3413-a first portion; 3414-a second portion; 3415-a third portion; 343 a-a body portion; 343 b-end portion;

371-temperature sensing probe; 372-conducting wire.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In the description of the embodiments of the present application, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of indicated technical features is significant. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the present application, it is to be understood that the terms "inner," "outer," "upper," "bottom," "front," "back," and the like, if any, refer to the orientation or positional relationship shown in FIG. 1, which is used for ease of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.

With the development of electronic information technology, electronic devices are becoming an integral part of people's daily life and work. Among them, portable electronic devices (such as mobile phones, tablet computers, notebook computers, and personal digital assistants) are popular because of their portability.

Fig. 1 is an exploded schematic view of an electronic device according to an embodiment of the present disclosure.

Referring to fig. 1, an embodiment of the present application provides an electronic device 10, where the electronic device 10 may be a portable electronic device 10 such as the aforementioned mobile phone, tablet computer, notebook computer, or personal digital assistant. For convenience of understanding, in the embodiment of the present application, the electronic device 10 is taken as a mobile phone as a specific example.

Referring to fig. 1, the electronic device 10 includes a display screen 100, a housing 200, and electronic components disposed in the housing 200, wherein the electronic components disposed in the housing 200 may be specifically electronic components such as a processor, a memory, a camera, a microphone, and a speaker. It is understood that other electronic components may be disposed in the electronic device 10, and details of this embodiment are not repeated.

When the electronic components are in operation, for example, the display screen 100 displays video, images, or text information, or the processor processes and executes the received operation signal, or the speaker plays an audio signal, and the like, all consume electric energy. That is, the user needs to consume power while using the aforementioned portable electronic device 10.

Referring to FIG. 1, to satisfy the aforementioned use of the portable electronic device 10, the electronic device 10 typically further includes a battery 300. The battery 300 may be disposed inside the housing 200 of the electronic device 10, and may provide power required for the operation of each electronic component inside the electronic device 10.

It is understood that the battery 300 may be detachably connected to the electronic device 10, for example, a rear cover is disposed at the rear side (specifically, the side facing away from the display screen 100) of the housing 200 of the electronic device 10, the rear cover is detachably connected to the housing 200, and the battery 300 is mounted to the electronic device 10 through the opened rear cover.

Of course, in some alternative examples, the battery 300 may be directly embedded in the housing 200 of the electronic device 10 in order to improve portability of the electronic device 10. That is, when the electronic device 10 is produced, the battery 300 can be directly packaged inside the housing 200 of the electronic device 10, which can improve the portability of the electronic device 10 and the stability of the electrical connection between the battery 300 and the electronic device 10.

Fig. 2 is a schematic structural diagram of a battery provided in an embodiment of the present application.

Referring to fig. 2, an embodiment of the present application provides a battery 300, including a battery cell 300a, where the battery cell 300a may be an aluminum-clad battery cell, a soft-package battery cell, or a cylindrical battery cell. In some specific examples, for example, when the electronic device 10 is a mobile phone, the battery cell 300a may be an aluminum-shell battery cell, and when the electronic device 10 is a notebook computer, the battery cell 300a may be a cylindrical battery cell.

Fig. 3 is a schematic structural diagram of matching between a battery cell and a casing in a battery provided in an embodiment of the present application, and fig. 4 is another schematic structural diagram of matching between a battery cell and a casing in a battery provided in an embodiment of the present application.

Referring to fig. 3 and 4, in practice, a tab 320 is connected to one end of the battery cell 300 a. Specifically, the battery cell 300a may include a cell body 310 and a tab 320 extending from one end of the cell body 310, and the tab 320 is electrically connected to the cell body 310. The positive electrode tab 320 and the negative electrode tab 320 are electrically connected to the cell body 310. For example, the tab 320 may have two (e.g., as shown in fig. 3), one of which is a positive tab 320 and the other of which is a negative tab 320.

Alternatively, the tabs 320 may have more than two tabs (for example, as shown in fig. 4), for example, three tabs 320 are connected to one end of the cell body 310, one of the tabs is a positive tab 320, and the other two tabs are parallel negative tabs 320, of course, one of the tabs may be a negative tab 320, and the other two tabs are parallel positive tabs 320, which is not limited in this embodiment of the application. In general, a cell 300a having more than two tabs 320 is referred to as a multi-tab cell.

Fig. 5 is a schematic view of another structure of a battery provided in an embodiment of the present application, in which a battery core is matched with a casing, and fig. 6 is a schematic view of a portion at a in fig. 5.

Referring to fig. 4-6, in an alternative design, the battery 300 further includes a casing 340, and the casing 340 is located at the periphery of the cell body 310.

It is understood that, in general, the cell body 310 cannot be directly used, and the casing 340 is coated/wrapped around the cell body 310. In some specific examples, the case 340 may be made of an aluminum-plastic film material, wherein the aluminum-plastic film has high barrier property, good cold stamping formability, puncture resistance, electrolyte stability, and the like, and is often used as the case 340 of the battery 300.

With continued reference to fig. 3 to 6, in an alternative example of the present application, the casing 340 is formed with a top sealing edge 343, a side sealing edge 344, and a protrusion 341 at the edge of the cell 300a, the top sealing edge 343 is bent toward the top end surface 311 of the cell body 310, for example, the top sealing edge 343 may be attached to the top end surface 311 of the cell body 310, the side sealing edge 344 may be bent toward the side end surface 312 of the cell body 310, for example, the side sealing edge 344 may be attached to the side end surface 312 of the cell body 310, and the top sealing edge 343 and the side sealing edge 344 are perpendicular to each other.

As described in detail in the previous embodiments, top seal edge 343 and side seal edge 344 are both made of an aluminum-plastic film material. In a specific arrangement, the top sealing edge 343 may be folded/bent by 90 degrees toward the cell body 310 by utilizing the bendability of the aluminum-plastic film, so that the top sealing edge 343 is parallel, approximately parallel, or substantially parallel to the top end surface 311 of the cell body 310 (i.e., the end surface of the cell body 310 in the positive direction of the y axis).

In some specific examples, after the top sealed edge 343 is folded by 90 degrees, the top sealed edge 343 may be fixed between the top sealed edge 343 and the top end surface 311 by dispensing.

Of course, in some examples, the top sealing edge 343 may be fixed by attaching an insulating adhesive tape to the top end surface 311 of the cell body 310 and then folding and attaching the top sealing edge 343 to the insulating adhesive tape.

Referring to fig. 5, it can be understood that the side sealing edges 344 are located at two opposite end faces 312 of the battery cell 300a in the width direction (the direction shown by x in fig. 5), that is, the side sealing edges 344 are two, one of the two side sealing edges 344 is located at one end of the top sealing edge 343, and the other of the two side sealing edges 344 is located at the other end of the top sealing edge 343. For example, the side sealing edge 344 on the left side of the cell 300a may be attached to the side end surface 312 on the left side of the cell body 310, one end of the side sealing edge 344 in the y direction is connected to the left end of the top sealing edge 343, the side sealing edge 344 on the right side of the cell 300a may be attached to the side end surface 313 on the right side of the cell body 310, and one end of the side sealing edge 344 in the y direction is connected to the right end of the top sealing edge 343.

The side sealing edge 344 may also be folded toward the battery cell 300a by using the characteristic that the aluminum-plastic film can be bent, so that the side sealing edge 344 is attached to the side end surface 312 of the battery cell body 310. Of course, the side seal edge 344 and the side end surface 312 of the cell body 310 may be fixed by an adhesive layer.

Referring to fig. 5, in the embodiment of the application, after the top sealing edge 343 is attached to the top end surface 311 of the cell body 310 and the side sealing edges 344 are attached to the side end surfaces 312 of the cell body 310, the space occupied by the battery 300 inside the electronic device 10 is reduced, that is, in the case that the same installation space is provided in the electronic device 10, a larger battery 300 may be installed, so that the volume of the cell body 310 of the cell 300a may be increased, in other words, the capacity of the battery 300 may be increased, and the cruising ability of the electronic device 10 may be effectively improved.

Referring to fig. 5 and 6, it should be noted that the top end surface 311 of the cell body 310 is an end surface of the cell body 310 on one side in the height direction (e.g., the direction indicated by y in fig. 5 or 6), and one end of the tab 320 extends out to the top end surface 311. The side end surfaces 312 of the cell refer to two end surfaces of the cell body 310 opposite in the width direction (for example, the direction indicated by x in fig. 5 or fig. 6).

Referring to fig. 6, it can be understood that the projection of the seal edge on the cell in the y direction in the embodiment of the present application is located on the top end surface 311, and the projection of the seal edge on the cell in the x direction is located on the side end surface 312.

Referring to fig. 5 and 6, the projection 341 is located between the top and side seals and extends toward the top end surface 311. The protruding portion 341 is higher than the top end surface 311 and extends out of the top sealing edge and the side sealing edge.

The number of the protruding portions 341 may be one (not shown), and one protruding portion 341 is located at one end of the top end surface 311 in the width direction and located between one end of the top sealing edge 343 in the width direction and the side sealing edge 344.

Of course, referring to fig. 5, in some examples, there may be two protruding portions 341, two protruding portions 341 are respectively located at two ends of the top end surface 311 in the width direction (referring to the direction indicated by x in fig. 5), one protruding portion 341 is located between one end (for example, the left end) of the top edge seal 343 in the width direction and the side edge seal 344, and the other protruding portion 341 is located between one end (for example, the right end) of the top edge seal 343 in the width direction and the side edge seal 344.

Fig. 7 is a plan view of a protective plate provided in an embodiment of the present application, and fig. 8 is a side view of the protective plate provided in the embodiment of the present application.

Referring to fig. 2, 7 and 8, the battery 300 according to the embodiment of the present disclosure further includes a protective plate 330, where the protective plate 330 is located on a side of the top sealing edge 343 opposite to the top end surface 311. The protective plate 330 is electrically connected to the cell body 310311 of the cell 300a via the tab 320.

Specifically, in the embodiment of the present application, the tab 320 may be connected to the connection terminal of the protection plate 330. In some specific examples, the connection terminal of the protection plate 330 may be a nickel plate 333 (shown with reference to fig. 8). The tab 320 and the nickel plate 333 may be welded by laser welding, resistance welding, ultrasonic welding, or the like.

It is understood that an insulating protective layer may be provided at the welding position of the tab 320 and the protective plate 330 to insulate the welding position so as to prevent a short circuit.

Referring to fig. 7 and 8, the protection plate 330 may be made of Printed circuit boards (PCBs for short). For example, the protection plate 330 may include a substrate 331 and a plurality of electronic components 3311 disposed on the substrate 331. The plurality of electronic components 3311 are electrically connected by printed circuits on the substrate 331. The plurality of electronic components 3311 may include capacitors, resistors, MOS switches, IC circuits, and the like.

It is understood that the protective plate 330 is mainly used to connect the battery cell 300a to external electronic equipment, and can protect the battery cell 300 a. For example, when the battery 300 is charged by an external power source and the inside of the battery 300 reaches a saturation state, the internal circuit of the protection plate 330 is automatically cut off, thereby preventing overcharge.

Referring to fig. 7 and 8, an electrical connector for electrically connecting the protection plate 330 with an external electronic device may be, for example, a flexible circuit board 380, one end of the flexible circuit board 380 being electrically connected with a part of the electronic components 3311 of the protection plate 330, and the other end of the flexible circuit board 380 being electrically connected with the external electronic device.

Of course, the protective plate 330 has other functions, such as over-discharging the battery 300, and when the battery 300 is over-discharged, the discharging circuit on the protective plate is automatically cut off, so as to ensure that the battery 300 is not completely discharged, and of course, to ensure that the current in the battery 300 is stable, and to prevent the battery 300 from being overheated due to discharging.

In addition, in some examples, the protective plate 330 may also isolate the plurality of batteries 300 from causing a short circuit.

Fig. 9 is another plan view of a protection plate provided in an embodiment of the present application, and fig. 10 is another side view of the protection plate provided in the embodiment of the present application. Referring to fig. 9 and 10, the protection plate 330 may include a first region 330a and a second region 330b, and the height of the second region 330b is greater than that of the first region 330a.

It should be noted that the height of the first region 330a refers to a distance between two sides of the first region 330a of the protection plate along the height direction (for example, the direction indicated by y in fig. 10), and specifically, refer to d1 in fig. 10. Accordingly, the height of the second region 330b refers to the distance between two sides of the second region 330b of the protection plate along the height direction (e.g. the direction y shown in fig. 10), and can be specifically referred to as d2 in fig. 10.

The first region 330a is a thinning region, and the second region 330b is a thickening region. For example, referring to fig. 7, in a specific configuration, a plurality of electronic components 3311 may be collectively disposed in one region of the protection plate 330 to form a second region 330b with a larger height, so that the second region 330b is a thickened region, in other words, a plurality of electronic components 3311 are disposed on the substrate 331 in the second region 330b of the protection plate 330, so that the thickness of other regions, for example, the first region 330a, may be thinned during manufacturing, thereby reducing the spatial dimension of the protection plate 330, thereby shortening the length of the wire running in the protection plate 330.

Referring to fig. 8, in some examples, the plurality of electronic components 3311 of the protection plate 330 may be located on one side of the protection plate 330, for example, the plurality of electronic components 3311 are usually disposed on one surface (e.g., the upper surface of fig. 8) of the substrate 331, and a surface of the protection plate 330 on which the electronic components 3311 are disposed forms a "convex" structure. The second region 330b is a region having electronic components in the protection plate 330, and the first region 330a is a region where no electronic component 3311 is disposed in the protection plate 330, such that the second region 330b is higher than the first region 330a.

In this example, the other surface of the substrate 331 (e.g., the lower surface of the substrate 331 in fig. 8), i.e., the surface of the protection plate 330 on the side facing away from the electronic component 3311, is a flat surface.

Of course, in other examples, the electronic components 3311 may be provided in the second regions 330b on both sides of the protection plate 330 in the y direction, for example, a plurality of electronic components 3311 may be provided on both upper and lower surfaces of the substrate 331, so that both sides of the protection plate 330 in the height direction are formed in a zigzag structure, that is, the substrate 331 has a convex structure on both surfaces thereof and the entire protection plate 330 is formed in a zigzag structure.

Referring to fig. 10, in some examples, the second region 330b may be located at a middle region of the protection plate 330, and accordingly, the first region 330a is located at an edge region of the protection plate 330, that is, the first region 330a is located at both sides of the second region 330b in a length direction (refer to a direction x in fig. 10) of the protection plate 330.

For example, the protection plate 330 includes two first regions 330a and a second region 330b located between the two first regions 330a, that is, any one end of the second region 330b in the length direction has a certain distance (see L in fig. 10) from one end of the protection plate 330 located on the same side. For example, the left end of the second region 330b and the left end of the protection plate 330 have a distance L therebetween, which is equal to the length of the first region 330a to the left of the second region 330 b.

Accordingly, the right end of the second region 330b and the right end of the protection plate 330 have a distance L therebetween, which is equal to the length of the first region 330a to the right of the second region 330 b.

In other examples, the second region 330b may be located at an edge region of the protective plate 330 in the length direction.

For example, the second region 330b may be located at a left edge region of the protection plate 330, and accordingly, the first region 330a is located at a right edge region of the protection plate 330, that is, the protection plate 330 is sequentially the second region 330b and the first region 330a along a length direction (refer to a direction indicated by x in fig. 10), wherein a left end of the second region 330b is flush with a left end of the protection plate 330, that is, a distance L between the left end of the second region 330b and the left end of the protection plate 330 is zero, and a distance L between a right end of the second region 330b and the right end of the protection plate 330 is equal to a length of the first region 330a. It is understood that the right end of the first region 330a is flush with the right end of the protection plate 330.

For another example, the second region 330b may be located at a right edge region of the protection plate 330, and accordingly, the first region 330a is located at a left edge region of the protection plate 330, that is, the protection plate 330 is sequentially a first region 330a and a second region 330b along a length direction (refer to a direction indicated by x in fig. 10), wherein a right end of the second region 330b is flush with a right end of the protection plate 330, that is, a distance L between a left end of the second region 330b and a left end of the protection plate 330 is equal to a length of the first region 330a. It can be understood that the left end of the first region 330a is flush with the left end of the protection plate 330.

The embodiment of the present application does not limit the position of the second area 330b, and can be specifically adjusted according to actual needs.

Fig. 11 is a partial enlarged view at B in fig. 2. Referring to fig. 2 and 11, the second region 330b of the protective plate 330 and the protruding portion 341 are arranged in a staggered manner in the width direction of the cell body 310 (refer to the direction indicated by x in fig. 11), that is, the projection of the second region 330b on the cell body 310 in the y direction is arranged in a staggered manner with respect to the protruding portion 341.

For example, the protruding portion 341 is located at the left end of the cell body 310 in the width direction, and the projection of the second region 330b of the protective plate 330 on the cell body 310 in the y direction is located at any region on the right side of the protruding portion 341, for example, the middle region of the top end surface 311 of the cell body 310. Alternatively, the protruding portion 341 is located at the right end of the cell body 310 in the width direction, and the projection of the second region 330b on the cell body 310 in the y direction is located at any region on the left side of the protruding portion 341, for example, the central region of the top end surface 311 of the cell body 310.

Referring to fig. 5 and 11, it can be understood that a concave portion 342 can be formed between the protruding portion 341 and the top sealing edge 343, where the concave portion 342 is located at one side of the protruding portion 341 along the width direction of the cell body 310, for example, at a middle region of the side of the top sealing edge 343 opposite to the top end surface 311.

By arranging the second region 330b and the protruding portion 341 in a staggered manner in the width direction of the cell body 310, the space of the other region except for the protruding portion 341 on the top end surface 311 can be reasonably utilized, for example, the second region 330b can be arranged in the recessed portion 342 formed on one side of the protruding portion 341, so as to avoid the second region 330b of the protection plate 330 from additionally occupying the height space of the cell 300a to increase the height of the battery, thereby reducing the height dimension of the battery 300, so as to increase the energy density of the cell 300a during the arrangement, on the other hand, the distance between the second region 330b of the protection plate 330 and the cell body 310 is reduced, thereby reducing the length of the tab 320 for electrically connecting the second region 330b and the cell 300a, so that the resistance and the power consumption between the second region 330b of the protection plate 330 and the cell body 310 are reduced, and the charging and discharging of the battery 300 and the full utilization of the battery capacity are facilitated.

Referring to fig. 2, the second region 330b of the protection plate 330 is connected to the tab 320, for example, the electronic component 3311 on the second region 330b is electrically connected to the tab 320, so that the electronic component 3311 on the protection plate 330 is electrically connected to the cell body 310.

As shown in fig. 11, in some examples, the first region 330a may be disposed opposite to the protruding portion 341, that is, the first region 330a and the protruding portion 341 have an overlapping region in projection in the y direction, for example, the projection region of the first region 330a on the cell body 310 in the y direction overlaps with the projection region of the protruding portion 341 on the cell body 310.

As shown in fig. 11, for example, at least a portion of the first region 330a may be located on a side of the protruding portion 341 facing away from the cell body 310, so that a surface of the first region 330a may be fixed on the protruding portion 341, thereby improving the stability of the protection plate 330 on the top end surface 311 of the cell body 310 and ensuring the electrical connection reliability of the protection plate 330 and the tab 320.

Generally, the electronic components 3311 on the protective plate 330 are packaged and then connected to the printed circuit board on the protective plate 330 by welding such as spot welding or soldering to realize the functions of the electronic components 3311. Of course, in some possible examples, each of the electronic components 3311 may be packaged after the electronic components 3311 are connected to the circuit on the protection board 330. After being packaged, the electronic components 3311 can be protected from each other, and the electronic components 3311 are isolated from each other, thereby avoiding interference.

However, when each of the electronic components 3311 is individually packaged, the volume of each of the electronic components 3311 is relatively large, and the space occupied by the electronic components 3311 on the protective plate 330 is relatively large. Like this, lead to the whole size of protection shield 330 to accomplish bigger just can hold all electronic component 3311, great battery 300 board backplate leads to the printed wiring on the battery 300 board backplate to walk the line length, and the big consumption of resistance of protection shield 330 is high, is unfavorable for battery 300's charge-discharge, also is unfavorable for the make full use of battery 300 electric quantity.

In view of this, as shown in fig. 8 and 10, the protection plate 330 according to the embodiment of the present application may further include an encapsulation layer 332, and the encapsulation layer 332 covers the plurality of electronic components 3311. For example, after the electronic component 3311 is connected to a circuit on the substrate 331, the electronic component 3311 is covered with the encapsulating layer 332. In this way, the encapsulating layer 332 encapsulates at least a part of the electronic components 3311 covered by the encapsulating layer to form an integral package, so that the volume occupied by individually encapsulating each electronic component 3311 can be reduced, in other words, the size of the protection plate 330 can be reduced, so that the circuit on the protection plate 330 is shorter, the resistance and the power consumption of the protection plate 330 can be reduced, which is beneficial to charging and discharging of the battery 300, and in addition, when the battery 300 discharges, the resistance of the protection plate 330 is smaller, which is more beneficial to fully utilizing the power of the battery 300, and the energy utilization rate is improved.

Referring to fig. 8 and 10, for example, the electronic components 3311 of the protection plate 330 are all located on one surface of the substrate 331 (e.g., the upper surface of the substrate 331 in fig. 8), and the encapsulation layer 332 covers the outer surfaces of the modules formed by all the electronic components 3311. The electronic component 3311 and the encapsulation layer 332 are located in the second region 330b of the protection plate 330, that is, the second region 330b of the protection plate 330 has the substrate 331, the plurality of electronic components 3311 located on the substrate 331, and the encapsulation layer 332 covering the electronic component 3311, so that the height of the second region 330b can be the distance between the surface of the substrate 331 facing away from the electronic component 3311 and the surface of the encapsulation layer 332 facing away from the electronic component 3311, which can be specifically shown by d2 in fig. 10. The height of the first region 330a is the distance between the two side surfaces of the substrate 331, which can be specifically referred to as d1 in fig. 10.

In practice, the substrate 331 may be a PCB, and in some possible examples, the substrate 331 may also be an integrated circuit board. When the substrate 331 is a PCB, the substrate 331 may be a 4-layer substrate, an 8-layer substrate, a 12-layer substrate, or a 16-layer substrate. It should be noted that, in the embodiment of the present application, the number of layers of the substrate 331 is only exemplified as some specific examples, and the specific number of layers of the substrate 331 is not limited.

Among them, the plurality of electronic components 3311 provided on the substrate 331 may have different functions, for example, the electronic component 3311 on the charge protection circuit for protecting the charge process, the electronic component 3311 on the discharge circuit for protecting the discharge process, or the like. Such as flexible wiring, control chips (ICs), field effect transistors (MOS), or some other electronic components 3311, such as capacitive resistors. Of course, the substrate 331 may also have other electronic components 3311, which is not described in detail in this embodiment.

Referring to fig. 10, in the embodiment of the present application, a System In a Package (SIP) may be used to cover and Package the plurality of electronic components 3311. Since the electronic components 3311 protrude from the surface of the substrate 331, the encapsulating layer 332 also protrudes from the surface of the substrate 331 when a plurality of the electronic components 3311 are encapsulated.

It should be noted that, in the embodiment of the present application, the package layer 332 protrudes from one surface of the substrate 331, that is, in the embodiment of the present application, the upper electronic component 3311 of the substrate 331 is packaged by using SIP, at least a part of the electronic component 3311 on one surface of the substrate 331 is packaged, and then at least a part of the electronic component 3311 on the other surface of the substrate 331 is packaged.

In some specific examples, the encapsulation layer 332 may be a molding compound.

It is understood that in some possible examples, SIP packaging may also be used for the substrate 331 and the electronic component 3311 on the substrate 331, i.e., the packaging layer 332 covers and packages the entire substrate 331 and the electronic component 3311 on the substrate 331.

The plurality of electronic components 3311 on the substrate 331 are integrally packaged by the encapsulating layer 332, that is, the plurality of electronic components 3311 do not need to be individually packaged each. In other words, the plurality of electronic components 3311 are integrally packaged by the package layer 332, so that the space occupied by each electronic component 3311 for individual packaging can be saved, the occupied space of the plurality of electronic components 3311 on the substrate 331 can be reduced, and the occupied space of the substrate 331 can also be reduced, thereby shortening the length of the traces on the substrate 331. Compare in prior art, can reduce the required space that occupies of base plate 331, shortened the length of walking the line on the base plate 331 to can effectively reduce the resistance of protection shield 330, reduce the consumption of protection shield 330, promote the utilization ratio of battery 300 electric quantity, and then can promote battery 300's duration.

In addition, the packaging layer 332 covers the area where the plurality of electronic components 3311 are formed to form a complete package, so that the packaging layer 332 covers the entire substrate 331, and thus, the substrate 331 can be reinforced to some extent, that is, the mechanical strength of the substrate 331 can be improved.

It is understood that the area where the plurality of electronic components 3311 are formed is covered by the encapsulating layer 332, so that the encapsulating layer 332 can uniformly conduct the heat generated by the electronic components 3311, that is, the plurality of electronic components 3311 are covered and encapsulated by the encapsulating layer 332, so that the protective plate 330 can have good heat uniformity. Of course, the protection plate 330 is improved in interference resistance, corrosion resistance, and the like.

Note that, usually, the electronic components 3311 of the protective plate 330 are attached to the surface of the substrate 331, that is, the electronic components 3311 are protruded with respect to the surface of the substrate 331. The electronic component 3311 is protected by the sealing member to completely encapsulate the electronic component 3311.

Referring to fig. 10, in a specific arrangement, the height of the second region 330b protruding from the first region 330a may be 0.8-2.0mm. For example, in the example corresponding to fig. 10, that is, the plurality of electronic components 3311 and the encapsulation layer 332 are located on one surface of the substrate 331, and the plurality of electronic components 3311 and the encapsulation layer 332 are located on the second region 330b of the protection plate 330, the height of the encapsulation layer 332 protruding from the substrate 331 is 0.8-2.0mm.

Illustratively, the height of the second region 330b protruding from the first region 330a may be 0.8mm, 1.2mm, 1.6mm, or 2.0mm, which may be adjusted according to the actual situation.

Here, the height of the second region 330b protruding from the first region 330a may be a height of the second region 330b extending from the first region 330a along the height direction (the direction shown by y in fig. 10) of the protection plate 330, that is, a height of the encapsulation layer 332 extending from the substrate 331 may be between 0.8mm and 2.0mm, so that the electronic component 3311 (specifically, the electronic component 3311 with the highest height) on the substrate 331 can be completely encapsulated, and the electronic component 3311 can be well protected.

Wherein the height d1 of the first region 330a may be 0.6-1.5mm, for example, in an alternative example of the present application, the thickness of the substrate 331 is 0.6-1.5mm, so that the substrate 331 has sufficient mechanical strength. It is understood that the substrate 331 may be 4-ply, 8-ply, or the like, as described in detail in the foregoing embodiments. In some specific examples, the number of layers of the substrate 331 may be selected according to actual requirements. Of course, the thickness of the substrate 331 will vary accordingly. For example, when the substrate 331 has 8 layers, the thickness of the substrate 331 is 1.2mm, and when the substrate 331 has 6 layers, the thickness of the substrate 331 is 1.0mm, and the like.

Referring to fig. 10, the height d2 of the second area 330b may be 1.4-3.5mm, for example, in an alternative example of the present application, the distance between the lower surface of the substrate 331 and the surface of the encapsulation layer 332 facing away from the substrate 331 may be 1.4-3.5mm, so as to avoid that the second area 330b is too high to occupy too large a dimension in the height direction of the battery 300, thereby ensuring the capacity of the battery cell 300 a. Illustratively, the height d2 of the second region 330b may be 1.4mm, 2mm, 2.5mm, 3mm or 3.5mm, which may be adjusted according to practical situations.

It should be noted that the numerical values and numerical ranges related to the embodiments of the present application are approximate values, and there may be a range of errors due to the manufacturing process, and such errors may be considered as negligible by those skilled in the art.

With continued reference to FIG. 10, in the present embodiment, the first region 330a may have a length of 2-15mm. For example, when the second region 330b is located in the middle region of the protection plate 330, both sides of the second region 330b in the length direction are the first regions 330a, and the length of the first region 330a can be understood as the distance that the second region 330b is retracted from both ends of the protection plate 330.

For example, the length L between the left end of the second region 330b in the x direction and the left end of the protection plate 330 may be 2-15mm, i.e., the length L of the first region 330a of the second region 330b on the left side in the x direction is 2-15mm; alternatively, the length L between the right end of the second region 330b in the x direction and the right end of the protection plate 330 may be 2-15mm, i.e., the length L of the first region 330a on the right side of the second region 330b in the x direction is 2-15mm.

It is understood that, in the above example, both ends of the encapsulation layer 332 in the length direction are recessed between both ends of the substrate 331 in the length direction. It should be noted that the length direction of the encapsulation layer 332 may specifically refer to the x direction in fig. 10, where two ends of the encapsulation layer 332 in the length direction are recessed from two ends of the substrate 331 in the length direction, which means that the overall length of the encapsulation layer 332 is smaller than the overall length of the substrate 331, and in addition, neither end of the two ends of the encapsulation layer 332 is flush with either end of the substrate 331. In other words, referring to fig. 10, after the electronic component 3311 on the substrate 331 is packaged by using SIP, the packaging layer 332 and the electronic component 3311 located in the packaging layer 332 form a boss-like structure on the surface (e.g., the upper surface in fig. 10) of the substrate 331, that is, the whole shape of the packaged protection board 330 is in a "convex" shape.

Thus, when the protection plate 330 is mounted and connected with the battery cell 300a of the battery 300, the protruding second region 330b and the protruding portion 341 can be ensured to be arranged in a staggered manner, so that the second region 330b can be arranged in the recessed position of the protruding portion 341 along one side of the x direction, the space occupied by the protection plate 330 can be reduced, and the capacity of the battery 300 can be improved.

In the above example, the lengths of the two first regions 330a may be 2mm, 5mm, 8mm, 12mm, 15mm, or the like, and the retraction distance L between the two ends of the encapsulation layer 332 in the length direction may be 2mm, 5mm, 8mm, 12mm, 15mm, or the like, for example.

Note that, the retraction distance of both ends of the encapsulating layer 332 in the length direction may be the same, for example, both ends of the encapsulating layer 332 are retracted by 2mm, 5mm, and the like. Of course, the retraction distance of the two ends of the encapsulating layer 332 along the length direction can be different. For example, referring to fig. 10, the retraction distance of the left end of the encapsulation layer 332 may be 5mm, and the retraction distance of the right end of the encapsulation layer 332 may be 10mm. The selection may be made according to the distribution of the electronic components 3311.

Of course, in other examples, when there is one projection 341, one end of the second region 330b may be extended to be flush with one end of the protective plate 330, and between the other end of the second region 330b and the other end of the protective plate 330 is the first region 330a, the length of the first region 330a is 2-15mm, that is, the other end of the second region 330b is retracted 2-15mm with respect to the other end of the protective plate 330.

For example, referring to fig. 11, the protrusion 341 is located at the left end of the top end surface 311, a partial region at the right end of the protection plate 330 may be taken as the second region 330b, accordingly, a portion at the left side of the second region 330b is taken as the first region 330a, and the length L of the first region 330a may be 2-15mm, that is, the distance between the left end of the second region 330b and the left end of the protection plate 330 is 2-15mm, in other words, one end of the second region 330b is retracted by 2-15mm relative to one end of the protection plate 330, so as to ensure that the second region 330b is arranged in a staggered manner with respect to the protrusion 341 at the left end, so that the second region 330b 342 is located completely in the recessed position at the right side of the protrusion 341, thereby being beneficial to reducing the space required by the protection plate 330 and being beneficial to improving the capacitance of the battery 300.

For example, the retraction distance of one end of the encapsulation layer 332 is 2-15mm, and the retraction distance of one end of the encapsulation layer 332 may be 2mm, 5mm, 8mm, 12mm, or 15mm, for example.

Referring to fig. 2, when there are two protrusions 341, the second region 330b is located in the middle region of the protection plate 330, that is, two ends of the second region 330b are retracted into two ends of the protection plate 330 along the length direction, wherein two sides of the second region 330b along the length direction are the first regions 330a respectively.

For example, referring to fig. 2 and 11, the battery 300 is formed with a concave portion 342 between two protrusions 341, the concave portion 342 is surrounded by the two protrusions 341 and the top sealing edge 343, the second region 330b of the protective plate 330 is located in the concave portion 342, that is, the encapsulation layer 332 protruded from the protective plate 330 is located between the two protrusions 341.

That is to say, in the embodiment of the present application, when the protection plate 330 is mounted and fixed, the second region 330b of the protection plate 330 in the shape of the letter "convex" is located in the concave portion 342 between the two protruding portions 341, so that the space occupied by the protection plate 330 can be reduced, that is, in the case that the electronic device 10 provides the same mounting space position, the volume of the cell body 310 of the cell 300a can be increased, thereby increasing the electric capacity of the cell 300a and improving the cruising ability of the electronic device 10.

As shown in fig. 2 and 11, the two first regions 330a of the protection plate 330 are respectively disposed opposite to the two protrusions 341, for example, at least a portion of the two ends of the substrate 331 are disposed opposite to the two protrusions 341, so that the two ends of the first regions 330a, for example, the two ends of the substrate 331, can be respectively connected to the two protrusions 341 when the protection plate 330 is mounted.

For example, referring to fig. 2, the left end of the substrate 331 is connected to one of the protrusions 341 on the left side, and the right end of the substrate 331 is connected to one of the protrusions 341 on the right side, that is, the first region 330a on the left side is connected to the protrusion 341 on the left side, and the first region 330a on the right side is connected to the protrusion 341 on the right side, so that the assembling stability of the protection plate 330 on the top end surface 311 of the cell body 310 is improved.

In some alternative examples, the first region 330a of the protection plate 330 and the protruding portion 341 may be connected through a first insulating layer (not shown in the drawings).

Specifically, in the embodiment of the present application, a first insulating layer may be formed on the protruding portion 341 between two ends of the substrate 331 of the protection plate 330 and the protruding portion 341 by dispensing, and the protection plate 330 is adhered/bonded on the protruding portion 341 through the first insulating layer. Thus, the protection plate 330 can be easily fixed.

In addition, the first insulating layer connects the protection plate 330 and the protrusion 341, so that a short circuit can be avoided, the protrusion 341 of the aluminum plastic film can be protected, liquid leakage of the battery 300 can be avoided, and the use safety of the battery 300 is improved.

Fig. 12 is a partially enlarged view of a projection provided on a case in a battery according to an embodiment of the present application, fig. 13 is another partially enlarged view of a projection provided on a case in a battery according to an embodiment of the present application, and fig. 14 is still another partially enlarged view of a projection provided on a case in a battery according to an embodiment of the present application.

Referring to fig. 6, 12 to 14, the structure of the protruding portion 341 according to the embodiment of the present application may be various.

As an example, as shown in fig. 6, 12 and 13, the protruding portion 341 may be formed by bending a portion of the housing 340 where the top seal edge 343 and the side seal edge 344 extend out of the top end surface 311.

Referring to fig. 12, for convenience of description, a portion of the housing in which the top sealing edge 343 and the side sealing edge 344 extend out of the top end surface 311 may be used as the extension 345, wherein a portion of the housing in which the top sealing edge 343 extends out of the top end surface 311 is used as the first extension 345a, and a portion of the housing in which the side sealing edge 344 extends out of the top end surface 311 is used as the second extension 345b.

Referring to fig. 11-13, the bending manner of the protruding portion 341 can be varied. Referring to fig. 12, as a first bending manner, the first extending portion 345a may be folded and attached to the surface of the second extending portion 345b facing the top end surface 311, so that the protruding portion 341 is formed by the first extending portion 345a and the second extending portion 345b which are attached to each other.

Referring to fig. 6, as a second bending manner, the protruding portion 341 may include a first bending section 3411 and a second bending section 3412, and the first bending section 3411 is located between the second bending section 3412 and the top sealing edge 343. For example, in some examples, the first folded section 3411 may be attached to the top sealed edge 343 and the second folded section 3412 may be parallel to the top sealed edge 343.

In a specific arrangement, the end portions of the first extension portion 345a and the second extension portion 345b, which are attached to each other in fig. 12, may be wound 180 degrees toward the cell body 310, and specifically, the winding direction of the end portions of the first extension portion 345a and the second extension portion 345b may be winding toward the inner side (e.g., the direction opposite to the direction shown by the z-axis in fig. 12) of the side seal edge 344344, so as to form the first bending section 3411. Specifically, the first bending segment 3411 may be wound from the end of the first extending portion 345a and the second extending portion 345b toward/near the electric core 300a by a distance of 0.2-1.0mm, in other words, the length of the first bending segment 3411 is 0.2-1.0mm, and may be, for example, 0.5mm, 0.7mm, or 1.0 mm.

It can be understood that, by winding the end portions of the first extension portion 345a and the second extension portion 345b, after the winding, the end portions of the first extension portion 345a and the second extension portion 345b face the cell body 310 without being exposed to the outside, so that the corrosion of the cross section of the aluminum plastic film can be avoided, and the service life of the battery 300 can be prolonged.

In addition, after the first bending section 3411 is wound, the remaining protruding portions of the ends of the first extension part 345a and the second extension part 345b are wound/bent in the same direction as described above by 90 degrees. That is, the remaining portions of the first and second extending

portions

345a and 345b extending out of the top end surface 311 are bent 90 degrees again toward the z-axis direction in fig. 12, so as to form a second bent segment 3412 parallel or approximately parallel to the top sealing edge 343, wherein the first bent segment 3411 is located between the second bent segment 3412 and the top sealing edge 343.

It can be understood that, in order to avoid the first bending section 3411 after being bent from being recovered or warped, after the first bending section 3411 is wound/bent, the first bending section 3411 may be fixed by dispensing or attaching an insulating adhesive tape on the inner side of the first bending section 3411. Of course, after the second bending section 3412 is bent, the inner side of the second bending section 3412 (i.e., the side of the second bending section 3412 facing the top seal edge 343) may be fixed by dispensing or attaching an insulating adhesive.

In this way, after the protruding portion 341 corresponding to fig. 12 is bent and wound to a certain extent, the protruding portion 341 corresponding to fig. 6 is formed, so that the length of the protruding portion 341 protruding from the top end surface 311 is shortened, and the occupied space of the protruding portion 341 can be reduced, that is, in the case that the electronic device 10 provides the same installation space position, the battery 300 can have a larger volume, and the volume of the battery cell body 310 can be increased, thereby increasing the electric capacity of the battery cell 300a and improving the cruising ability of the electronic device 10.

Referring to fig. 13, as a third bending manner, referring to fig. 13, a sharp corner at a corner of the first extending portion 345a and the second extending portion 345b may be folded, that is, a part of the first extending portion 345a and the second extending portion 345b may be bent, for example, by 180 degrees, and then the top sealing edge 343 is folded toward/toward one side of the cell body 310, for example, by 90 degrees, so that the top sealing edge 343 is parallel or approximately parallel to the top end surface 311 of the cell body 310, and then the side sealing edge 344 is bent toward the direction of the cell body 310 by approximately 90 degrees, so as to obtain the structure corresponding to fig. 13. After the sharp corner of the first extension part 345a and the second extension part 345b is folded, the sharp corner can be fixed by gluing on the inner surface of the sharp corner.

Referring to fig. 13, the protrusion 341 formed by the third bending manner may include a first portion 3413, a second portion 3414 and a third portion 3415, wherein the first portion 3413 is connected to the side sealing edge 344, the second portion 3414 is connected to the first portion 3413 and is bent toward the top end surface 311, and the third portion 3415 is located on a side of the second portion 3414 opposite to the first portion 3413 and is connected to the top sealing edge 343.

It is understood that the first portion 3413 and the second portion 3414 are two portions of the second extension 345b, and the second portion 3414 is a portion of the second extension 345 bent toward the top end surface 311. Wherein the second portion 3414 can be attached to the first portion 3413 on the side facing the top end surface 311.

In addition, the third portion 3415 is the first extension 345a, wherein the third portion 3415 is bent toward the top end face 311311.

The top sealing edge 343 may include a main body portion 343a and end portions 343b at both ends of the main body portion 343a in the length direction, and the end portions 343b are connected to the second portion 3414.

Referring to fig. 13, a portion of the top sealing edge 343 near the second portion 3414, such as the end portion 343b, may be bent away from the top end surface 311, so that when at least a portion of the top sealing edge 343, such as the main body portion 343a, is bent to be parallel or approximately parallel to the top end surface 311, the end portion 343b can transition to be connected to the second portion 3414 more smoothly, thereby preventing the end portion 343b and the third portion 3415 from being excessively bent and damaged.

As shown in fig. 13, for example, the third portion 3415 may include two portions, one portion (shown in fig. 13 as "m") is disposed opposite to the second portion 3414, and the other portion (shown in fig. 13 as "n") is connected to a side of the second portion 3414 opposite to the end surface.

As another example, referring to fig. 14, the protrusion 341 may be formed by bending the main body portion 343a and the side sealing edge 344 of the top sealing edge 343 toward the cell body 310 by 90 degrees, and then forming a first extending portion 345a, a second extending portion 345b, and an end portion 343b of the top sealing edge 343.

For example, when the top edge seal 343 is folded, only the body portion 343a of the top edge seal 343 may be folded such that the body portion 343a is parallel or approximately parallel to the top end surface 311, and the end portions 343b at both ends of the body portion 343a are not folded such that the end portions 343b are perpendicular to the top end surface 311, that is, the outer end surface of the end portions 343b is disposed opposite to the top end surface 311, and then the side edge seal 344 is folded in the aforementioned folding manner such that the extending portions 345 (including the first extending portions 345 and the second extending portions 345) are perpendicular to the top end surface 311, that is, the extending portions 345 are perpendicular to the end portions 343b, thereby forming the protruding portion 341 shown in fig. 14.

Referring to fig. 14, the top seal edge 343 may have a transition section B between the main body portion 343a and the end portion 343B, where the transition section B is formed when the main body portion 343a is bent toward the top end surface 311. It will be appreciated that the angle between the transition section B and the top end surface 311 is acute.

As shown in fig. 2 and 11, in some examples, the encapsulation layer 332 may face the top sealing edge 343 of the case 340, that is, a protrusion formed on the battery protection plate 330 by the encapsulation layer 332 faces the top sealing edge 343, the first region 330a of the protection plate covers the protruding portion 341, and the second region 330b is offset from the protruding portion 341 in the width direction of the battery cell (the direction shown by x in fig. 11), that is, the second region 330b is opposite to the top sealing edge 343 on one side of the protruding portion 341.

Taking the protection plate having two first regions 330a and a second region 330b located between the two first regions 330a as an example, the first region 330a at the left end of the protection plate 330 covers the side of the protruding portion 341 at the left end of the top sealing edge 343, which faces away from the cell body 310, and the first region 330a at the right end of the protection plate 330 covers the side of the protruding portion 341 at the right end of the top sealing edge 343, which faces away from the cell body 310.

Referring to fig. 11, when the protruding portion 341 is formed by the second bending manner, the first region 330a covers the second bending section of the protruding portion 341, for example. For example, at least a portion of the left end of the substrate covers a side of the second bent section of the left end facing away from the cell body 310, and at least a portion of the right end of the substrate covers a side of the second bent section of the right end facing away from the cell body 310.

It will be appreciated that in this example, the first bent segment 3411 is attached to the top seal edge 343, and the second bent segment 3412 is located on a side of the first bent segment 3411 facing away from the top seal edge 343.

In addition, when the protrusion 341 is formed by the third bending manner, the first region 330a covers the first portion 3413, the second portion 3414 and the third portion 3415 of the protrusion 341.

In some examples, the first region 330a of the protective plate may abut the projection 341. For example, at least a portion of the end of the substrate may abut a side of the protrusion 341 (e.g., second bend section) facing away from the top seal 343. It will be appreciated that in this example, the first insulating layer is located between the first region 330a and the second bend section.

Referring to fig. 11, in this example, the height of the protrusion 341 may be less than or equal to the height of the second region 330b protruding from the first region 330a. It can be understood that the height of the second region 330b protruding from the first region 330a refers to the difference between the heights of the second region 330b and the first region 330a, and the difference is a value obtained by subtracting d1 from d2 (see fig. 10). For example, the height of the second region 330b protruding from the first region 330a may be a distance between a side of the encapsulation layer 332 facing away from the substrate 331 and the substrate 331.

It can be understood that, when the height of the protruding portion 341 is equal to the height of the second region 330b protruding from the first region 330a, the encapsulation layer 332 of the second region 330b may abut against the top sealing edge 343 on one side of the protruding portion 341, and at least a portion of the first region 330a abuts against the protruding portion 341, so that, on one hand, the assembling stability between the protection plate 330 and the battery cell 300a may be improved, and on the other hand, the size of the battery 300 formed by assembling the protection plate 330 and the battery cell 300a may be reduced, so that, when the battery is specifically configured, the capacity of the battery cell body 310 may be increased, and the endurance time of the battery 300 may be increased.

When the height of the protruding portion 341 is smaller than the height of the second region 330b protruding from the first region 330a, the encapsulation layer 332 of the second region 330b may abut against the top sealing edge 343 on one side of the protruding portion 341, and the first region 330a covers the protruding portion 341, which may prevent the protruding portion 341 from being too high to support the protective plate 330, resulting in an excessively large distance between the protective plate 330 and the cell body 310, and the like, so as to reduce the length of the battery 300, thereby increasing the capacity of the cell body 310 and increasing the endurance time of the battery 300 during specific setting. It is understood that, in this example, the first region 330a and the protruding portion 341 have a gap therebetween, and a first insulating layer may be filled in the gap to connect and electrically isolate the first region 330a and the protruding portion 341.

It should be noted that in other examples, the encapsulating layer 332 may be disposed opposite to the top sealing edge 343 of the housing 340, that is, the protrusion formed on the protective plate 330 by the encapsulating layer 332 is opposite to the top sealing edge 343, and the side of the protective plate 330 not provided with the encapsulating layer 332 may be attached to the top sealing edge 343.

In this example, the protrusion 341 may be bent at a side of the first region 330a of the protection plate facing away from the top edge 343. For example, when the protruding portion 341 is formed by the second bending manner, the first bending section 3411 is bent and disposed on a side of the first region 330a of the protection plate facing away from the top sealing edge 343, for example, the first bending section 3411 is attached to a side of the first region 330a facing away from the top sealing edge 343, and the second bending section 3412 is located on a side of the first bending section 3411 facing away from the protection plate 330.

For example, the first bending section 3411 of the left protrusion 341 is attached to a side of the first region 330a of the left end of the protection plate (e.g., the left end of the substrate) facing away from the top sealing edge 343, the second bending section 3412 of the left protrusion 341 is located on a side of the first bending section 3411 facing away from the first region 330a of the left end of the protection plate, the first bending section 3411 of the right protrusion 341 is attached to a side of the first region 330a of the right end of the protection plate (e.g., the right end of the substrate) facing away from the top sealing edge 343, and the second bending section 3412 of the right protrusion 341 is located on a side of the first bending section 3411 facing away from the first region 330a of the right end of the protection plate.

In this example, the height of the portion of the protrusion 341 on the side of the first region 330a facing away from the top sealing edge 343 may be less than or equal to the height of the second region 330b protruding from the first region 330a, so that the end of the protrusion 341 facing away from the cell body 310 may be flush with or lower than the side of the second region 330b facing away from the top sealing edge 343.

For example, the height of the portion of the protruding portion 341 on the side of the first region 330a facing away from the top sealing edge 343 may be less than or equal to the distance between the encapsulating layer 332 and the substrate 331, so as to ensure that the end of the protruding portion 341 facing away from the cell body 310 is flush with or lower than the encapsulating layer 332, thereby avoiding the protruding portion 341 from occupying a certain height space on the side of the first region 330a facing away from the top end surface 311, and thus reducing the length dimension of the battery 300, and in this way, when specifically setting, the capacity of the cell body 310 may be increased, and the endurance time of the battery 300 may be increased.

It will be appreciated that in this example, the first insulating layer is located between the first region 330a and the first bend section. In addition, in this example, the height of the protruding portion 341 may be less than or equal to the height of the second region 330b protruding from the first region 330a, for example, one end of the protruding portion 341 facing away from the cell body 310 may be flush with or lower than a side surface of the encapsulation layer facing away from the substrate, so that the protruding portion 341 may be prevented from protruding out of the second region 330b of the protection plate to occupy extra height space of the battery, thereby saving a certain space for increasing the cell, increasing the capacity of the cell, and prolonging the battery life.

Fig. 15 is a schematic structural diagram of connection between a protection plate and a tab in a battery according to an embodiment of the present disclosure, fig. 16 is another schematic structural diagram of connection between a protection plate and a tab in a battery according to an embodiment of the present disclosure, fig. 17 is another schematic structural diagram of connection between a protection plate and a tab in a battery according to an embodiment of the present disclosure, and fig. 18 is another schematic structural diagram of connection between a protection plate 330 and a tab in a battery according to an embodiment of the present disclosure.

As described in detail in the foregoing embodiments, in the embodiment of the present application, the protection plate 330 is electrically connected to the cell body 310 through the tab 320. In order to reduce the space occupied by the protective plate 330 in the length direction (i.e., the height direction, refer to the direction indicated by y in fig. 15) of the battery cell 300a, the plate surface of the protective plate 330 is disposed parallel or approximately parallel to the end surface (e.g., the top end surface 311 described in the foregoing embodiment) of the battery cell 300 a. Thus, it is necessary to bend the tab 320 so that at least a portion of the tab is attached to the nickel plate 333 of the second region 330b of the protection plate for stable welding.

Referring to fig. 15 to 18, in an alternative example of the present application, the tab 320 includes a first connection segment 321 and a second connection segment 322, the second connection segment 322 is connected to the cell body 310 through the first connection segment 321, at least a portion of the first connection segment 320 is located in the top sealed edge 343, and the second connection segment 322 is used to connect to the protection plate 330.

It is understood that at least a portion of the first connecting segment 321 may be parallel or approximately parallel to the top end surface 311 of the cell body 310 along with the bending of the top sealing edge 343. In addition, the extending direction of the second connecting section 322 is the same as the thickness direction of the battery cell, that is, the second connecting section 322 is parallel to the plate surface of the protection plate 330 and welded to the nickel sheet 333 of the second region 330b of the protection plate 330, so as to electrically connect the tab to the protection plate 330.

Specifically, in this embodiment, after the top sealing edge 343 and the side sealing edge 344 are folded, the remaining portions (for example, a portion of the first connecting section 321 and the second connecting section 322) of the positive and negative electrode tabs 320 may be bent, for example, the remaining portions of the positive and negative electrode tabs 320 are bent by 90 degrees, so that the extending directions of the positive and negative electrode tabs 320 are consistent with the length direction of the electrical core 300a, then the length of the positive and negative electrode tabs 320 is trimmed to ensure that the tabs 320 with appropriate lengths are connected to the nickel sheet 333 on the protective plate 330, and at least a portion of the positive and negative electrode tabs 320 is attached to the nickel sheet 333 on the protective plate 330, and then welding is performed.

After being connected to the nickel sheet 333 of the protective plate 330, the protective plate 330 is folded to be parallel or approximately parallel to the top end surface 311 of the battery cell 300a, so that at least part of the positive and negative electrode tabs 320 and the nickel sheet 333 are parallel to the plate surface of the protective plate 330. Specifically, the second connection segment 322 of the positive and negative electrode tab 320 is a portion connected to the nickel plate 333 on the protection plate.

As shown in fig. 15 and 16, after the protective plate 330 is mounted on the top end surface 311 of the cell 300a, the connection point of the tab 320 and the protective plate 330 (e.g., the encapsulation layer 332 of the second region 330 b) may face toward/toward one side of the cell body 310; depending on the specific length of the tab 320, the folding can be performed in two ways, fig. 15 and fig. 16, respectively. For example, a single fold of tab 320 in fig. 15, or a double fold of tab 320 in fig. 16, etc.

In other examples, as shown with reference to fig. 17 and 18, after the protective plate 330 is mounted on the top end surface 311 of the battery cell 300a, the connection site of the tab 320 and the protective plate 330 (e.g., the encapsulation layer 332 of the second region 330 b) may face away from the side of the battery cell 300 a; depending on the specific length of the tab 320, the folding can be performed in two ways, fig. 17 and fig. 18, respectively. For example, the tab 320 is folded twice in fig. 17, or the tab 320 is folded three times in fig. 18, and so on.

When the tab 320 is folded, the bending point of the tab 320 is retracted into the surface of the cell body 310, that is, the projection of the tab 320 on the plane of the top end surface 311 is located in the top end surface 311. Like this, the department of buckling of utmost point ear 320 can not bulge electric core 300a, can avoid battery 300 to cause the condition of damage to utmost point ear 320 in the transportation to take place, in addition, has also avoided utmost point ear 320 additionally to occupy the space of electric core 300a along thickness direction one side to certain space has been practiced thrift for electric core body 310's increase, makes electric core body 310's capacity can increase, prolongs battery 300's duration.

The surface of the cell body 310 refers to any one of two surfaces of the cell body 310 opposing each other in the thickness direction. Referring to fig. 15, for convenience of description, the cell body 310 may include a first surface a and a second surface b opposite to each other in a thickness direction (shown in a z direction in fig. 15), and the top sealing edge 343 is bent toward the first surface a. Wherein the tab 320 is located at one side of the top end surface 311 between the first surface a and the second surface b.

For example, the first connecting section 321 is located inside the surface of the battery cell body 310 in the thickness direction of the battery cell 300a, and the distance between the first connecting section 321 and the surface of the battery cell 300a is greater than or equal to 0.2mm. In this way, a sufficient safety space can be provided for the tab 320, and the tab 320 can be effectively protected from being damaged.

For example, the distance between the side of the first connecting section 321 close to the first surface a and the first surface a (refer to d3 in fig. 15) is greater than or equal to 0.2mm, for example, d3 may be 0.2mm, 0.3mm, 0.4mm, or other suitable values, which can be adjusted according to the actual situation.

Alternatively, the distance between the side of the first connecting section 321 close to the second surface b and the second surface b (refer to d4 in fig. 15) is greater than or equal to 0.2mm, for example, d4 may be an appropriate value such as 0.2mm, 0.3mm, or 0.4mm, which may be adjusted according to the actual situation.

Referring to fig. 15 to 18, in addition, the projection of the protection plate 330 on the cell body 310 may be located in the top end surface 311, in other words, both ends of the protection plate 330 in the width direction may be flush with or lower than the surface of the cell body 310, on one hand, the situation that the protection plate 330 is damaged in transportation by the battery 300 can be avoided, and in addition, the protection plate 330 is also prevented from additionally occupying the space on one side of the cell 300a in the thickness direction, so that a certain space can be saved for increasing the cell body 310 of the cell 300a, the capacity of the cell 300a can be increased, and the endurance time of the battery can be prolonged.

Fig. 19 is a schematic structural diagram of matching of a battery cell and a casing in a battery provided in an embodiment of the present application.

Referring to fig. 19, a second insulating layer 350 is disposed on a side of the top sealing edge 343 opposite to the cell body 310, and at least the second region 330b of the protection plate 330 is attached to the second insulating layer 350, so that the protection plate 330 is electrically insulated from the top sealing edge 343.

With reference to fig. 19, for example, the second connecting section 322 is located between the protection plate 330 and the cell body 310, a second insulating layer 350 is disposed between the second connecting section 322 and the top sealing edge 343, at least a portion of the second connecting section 322 can be attached to the outer surface of the top sealing edge 343 through the second insulating layer 350, and at least a second region 330b of the protection plate 330 is attached to the second insulating layer 350. The outer surface of the top sealing edge 343 refers to a side surface of the top sealing edge 343 facing away from the battery cell 300 a.

The second insulating layer 350 may be an insulating adhesive paper to improve the stability of the protection plate 330 on the top end surface 311, so as to ensure the stability of the electrical connection between the protection plate 330 and the tab 320.

The adhesive paper material of the insulating adhesive paper may be dupont paper, polyimide (PI) film, polyethylene terephthalate (PET) film, and other films having insulating properties. In addition, the material of the double-sided back adhesive of the insulating adhesive paper can include but is not limited to pressure-sensitive adhesive or heat-sensitive adhesive such as acrylic adhesive, silica gel, hot melt adhesive and the like, and can be specifically selected according to implementation requirements.

Referring to fig. 19, since the second region 330b of the protection plate 330 protrudes from the first region 330a, the protection plate 330 has surface irregularities encapsulated therein. In some examples, the side of the second insulating layer 350 facing the protective plate 330 can have a compressible medium 350a (not shown), and the second region 330b of the protective plate 330 is attached to the compressible medium 350 a. For example, when the encapsulating layer 332 of the protection plate 330 faces the cell body 310, the second region 330b (e.g., the encapsulating layer) protruding from the protection plate 330 can be attached to the compressible medium 350a, so that the encapsulating layer 332 of the protection plate 330 can be tightly attached to the top sealing edge 343 under the elastic pre-stress of the compressible medium 350a, thereby improving the electrical connection stability between the tab 320 and the protection plate 330.

Specifically, compressible media 350a may be compressible foam, such as a single-sided compressible foam or a double-sided compressible foam.

In some possible examples, the second insulating layer 350 may also be formed on the outer surface of the top sealing edge 343 by dispensing.

By providing the second insulating layer 350 between the outer surface of the top sealing edge 343 and the protection plate 330, a short circuit can occur between other electronic components of the protection plate 330 and the tab 320. In addition, the insulating adhesive tape is used as the second insulating layer 350 to connect the outer surface of the top sealing edge 343 and the second connecting section 322, and connect the outer surface of the top sealing edge 343 and the protective plate 330, so that the folded second connecting section 322 can be prevented from being deformed, the tab 320 can be well fixed, and in addition, the protective plate 330 can be fixed, so that the protective plate 330 can be stably bonded to the top sealing edge 343 on one side of the battery cell 300 a.

Fig. 20 is a schematic view of another structure of the battery provided in the embodiment of the present application.

Referring to fig. 20, in another alternative example of the present application, a third insulating layer 360 is attached to a side of the protection plate 330 facing away from the cell body 310, at least a portion of the third insulating layer 360 covers the protection plate 330, and another portion of the third insulating layer 360 is connected to the cell body to fix the protection plate 330.

In addition, the third insulating layer 360 is provided to effectively electrically insulate the protection plate 330 from external electronic components.

Specifically, in this embodiment of the application, the third insulating layer 360 may be an insulating adhesive tape, that is, after the protection plate 330 and the battery cell 300a are installed in a matching manner, the insulating adhesive tape is reused for attaching protection on the surface of the protection plate 330 opposite to the battery cell body 310. It is understood that the adhesive material and the adhesive backing material of the third insulating layer 360 may be the same as the second insulating layer 350, and are not described herein again.

Fig. 21 is a partial schematic view at C in fig. 2. Referring to fig. 21, in order to secure the performance and safety of charging and discharging of the battery 300, in an alternative example of the present application, a temperature sensor 370 is provided in the battery 300, and the temperature sensor 370 is electrically connected to the protection plate 330. Specifically, the temperature sensor 370 is electrically connected with an electronic element, such as a control element, of the second region 330b of the protection plate 330 to enable signal transmission between the protection plate 330 and the temperature sensor 370.

During the charging and discharging processes of the battery 300, the temperature sensor 370 detects the temperature inside the battery 300, and transmits the detected temperature signal to the control element on the circuit protection board 330, and the control element adjusts the charging process according to the temperature signal detected by the temperature sensor 370, for example, limits the charging current or the charging voltage, so as to control and compensate the temperature during the charging and discharging processes of the battery 300.

Thus, the charging and discharging temperature of the battery 300 can be monitored to a certain extent, and the performance and the charging and discharging safety of the battery 300 are ensured to a certain extent.

Referring to fig. 21, in practice, the temperature sensor 370 may include a temperature sensing probe 371 and a wire 372, one end of the wire 372 is electrically connected to the protection plate 330, and the other end of the wire 372 is electrically connected to the temperature sensing probe 371, so as to achieve electrical connection between the temperature sensing probe 371 and the protection plate 330.

Specifically, in the embodiment of the present application, the temperature sensing probe 371 is used to detect the temperature of the cell body 310 in the cell 300 a. Wherein, this temperature sensing probe 371 can include sensor and surrounding layer, and wherein the surrounding layer cladding is in the periphery of sensor, and like this, the surrounding layer can play certain guard action to inside sensor. In some specific examples, the outer cladding may be an epoxy layer.

In order to improve the detection accuracy of the temperature sensor 370 on the temperature of the battery 300, the temperature sensing probe 371 of the temperature sensor 370 may contact the top sealing edge 343.

For example, referring to fig. 21, a top sealing edge 343 is attached to the top end surface 311 of the cell body 310, a temperature-sensing probe 371 is located between the top sealing edge 343 and the protective plate 330, and the temperature-sensing probe 371 is in contact with a side surface of the top sealing edge 343 facing away from the cell body 310.

It can be understood that the material of top banding 343 is the plastic-aluminum membrane, wherein, the aluminium lamination of plastic-aluminum membrane has good thermal conductivity, in battery 300 charge-discharge process, the aluminium lamination of aluminium plastic membrane outside transmission can be passed through fast to the heat that cell body 310 produced, that is to say, the casing 340 of battery 300 is close with the temperature of cell body 310, the difference in temperature is lower relatively, the temperature of top banding 343 can be the temperature of comparatively accurate reaction cell body 310, in this application embodiment, with temperature sensor 370's temperature sensing probe 371 and top banding 343 contact, like this, the temperature that temperature sensor 370 detected can be the temperature of more accurate reaction cell body 310.

For example, the temperature-sensitive probe 371 may be located between the first region 330a of the protective plate 330 and the top edge 343. (in fig. 21, the first region of the protective plate 330 is removed or hidden for easy observation of the temperature sensitive probe 371). For example, when the encapsulation layer 332 of the protection plate 330 is disposed toward the top sealing edge 343, since the second region 330b protrudes from the first region 330a, when the second region 330b is attached to the top sealing edge 343, a gap is formed between the first region 330a and the top sealing edge 343, and the temperature sensing probe 371 can be located in the gap, so as to reasonably utilize the idle space between the protection plate 330 and the battery cell, thereby making the structure of the battery more compact.

Referring to fig. 21, in some examples, the temperature sensing probe 371 of the temperature sensor 370 may be disposed proximate to the protrusion 341, e.g., the temperature sensing probe 371 may be located at an end 343b of the top seal 343. In fig. 21, the left side of the dotted line s is a main body portion 343a of the top-sealing edge 343, and the right side of the dotted line s is an end portion 343b of the top-sealing edge 343, and the end portion 343b is close to the protruding portion 341.

On the one hand, the installation of temperature sensing probe 371 can be convenient for, in addition, can also separate temperature sensing probe 371 and other electronic component on protection shield 330 apart, can avoid other electronic component to generate heat and cause the influence to temperature sensor 370, can improve temperature sensor 370 to the accuracy that the temperature detected. Compare with prior art, can carry out stable detection to battery charge-discharge temperature, can promote the recycling number of times of battery, also can promote the life of battery.

The temperature sensor 370 may be a thermistor in the foregoing embodiment, and the resistance of the thermistor changes with the change of temperature, and may be divided into a positive temperature coefficient thermistor and a negative temperature coefficient thermistor according to the difference of temperature coefficients, where the resistance of the positive temperature coefficient thermistor increases with the increase of temperature, and the resistance of the negative temperature coefficient thermistor decreases with the increase of temperature.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, comprising:

the battery cell comprises a shell, a side sealing edge and at least one bulge, wherein the shell is positioned at the periphery of the battery cell, a top sealing edge, a side sealing edge and at least one bulge are formed at the edge of a battery cell body of the shell, the top sealing edge is bent towards a top end surface, the top end surface is an end surface along the height direction of the battery cell body, and the bulge is positioned between the top sealing edge and the side sealing edge and extends towards the top end surface;

the protection plate is positioned on one side, away from the top end face, of the top seal edge and comprises a first area and a second area, and the height of the second area is larger than that of the first area; the second region is connected with the tabs, and the second region and the protruding portions are arranged in a staggered mode in the width direction of the battery cell body.

2. The battery of claim 1, wherein the first region is disposed opposite the protrusion.

3. The battery according to claim 1, wherein the protective plate comprises a substrate and an encapsulation layer; in the second region, a plurality of electronic elements are arranged on the substrate, and the packaging layer covers the plurality of electronic elements.

4. The battery of claim 1, wherein the height of the second region protruding from the first region is 0.8-2.0mm.

5. The battery of claim 1, wherein the first region has a length of 2-15mm.

6. The battery of claim 1, wherein the first region has a height of 0.6-1.5mm and/or the second region has a height of 1.4-3.5mm.

7. The battery of claim 1, wherein the encapsulation layer of the protective plate faces the top edge seal, and the first region covers or abuts the protrusion.

8. The battery of claim 7, wherein the tab includes a first folded section and a second folded section;

the attached in of first section of bending on the top banding, the second section of bending is located first section of bending dorsad one side of top banding, first region cover in the second is bent on the section.

9. The battery of claim 7, wherein the protrusion comprises a first portion, a second portion, and a third portion;

the first portion is connected with the side sealing edge, the second portion is connected with the first portion and bent towards the top end face, and the third portion is located on one side, back to the first portion, of the second portion and connected with the top sealing edge.

10. The battery of claim 7, wherein the height of the protrusion is less than or equal to the height of the second region protruding from the first region.

11. The battery of claim 1, wherein the encapsulation layer of the protection plate is disposed away from the top seal, and the tab bend is disposed at a side of the first region of the protection plate facing away from the top seal.

12. The cell defined in claim 1, wherein the first region is connected to the projection by a first insulating layer.

13. The battery according to any one of claims 1 to 12, wherein the number of the protruding portions is two, and the two protruding portions are respectively located at both ends of the tip end surface in the width direction;

the second region is located between the two projections.

14. The battery according to any one of claims 1 to 12, wherein a projection of the protective plate and/or the tab onto the plane of the top end face is located within the top end face.

15. The battery of claim 14, wherein the tab comprises a first connection section and a second connection section, the second connection section is connected to the cell body through the first connection section, at least a portion of the first connection section is located in the top sealing edge, and the second connection section is used for connecting to the protection plate.

16. The battery of claim 15, wherein the cell body comprises a first surface and a second surface opposite to each other in the thickness direction, and the top sealing edge is bent towards the first surface;

the distance between one side of the first connecting section close to the first surface and the first surface is greater than or equal to 0.2mm, or the distance between one side of the first connecting section close to the second surface and the second surface is greater than or equal to 0.2mm.

17. The battery of claim 15, wherein the second connecting section is located between the protection plate and the cell body, or is located on a side of the protection plate facing away from the cell body.

18. The battery of claim 17, wherein the second connecting section is located between the protective plate and the cell body, a second insulating layer is disposed between the second connecting section and the top seal edge, at least a portion of the second connecting section is attached to the outer surface of the top seal edge through the second insulating layer, and at least the second region of the protective plate is attached to the second insulating layer.

19. The battery of any one of claims 1 to 12, wherein a third insulating layer is attached to a side of the protection plate facing away from the cell body, at least a portion of the third insulating layer covers the protection plate, and another portion of the third insulating layer is connected to the cell body to fix the protection plate.

20. The battery according to any one of claims 1 to 12, further comprising a temperature sensor electrically connected to the protective plate;

a temperature sensing probe of the temperature sensor is positioned between the first area and the top sealing edge; or the temperature sensing probe of the temperature sensor is arranged close to the bulge.