CN211929598U

CN211929598U - Battery monomer, battery and device of power consumption

Info

Publication number: CN211929598U
Application number: CN202021993138.3U
Authority: CN
Inventors: 康文龙; 邢承友; 王鹏
Original assignee: Jiangsu Contemporary Amperex Technology Ltd
Current assignee: Jiangsu Contemporary Amperex Technology Ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2020-11-13
Anticipated expiration: 2030-09-14

Abstract

The application discloses battery monomer, device of battery and power consumption, battery monomer includes electrode subassembly, electrode terminal, switching part and protection piece, switching part's first switching portion is connected with electrode terminal, second switching portion is connected with electrode subassembly, at least some protection pieces are located the portion of holding that first switching portion and second switching portion formed and provide the support for between first switching portion and the second switching portion, prevent on the one hand that the metal fillings that first switching portion and second switching portion contact friction produced from causing the battery monomer short circuit, on the other hand reduces the clearance between first switching portion and the second switching portion, prevent that the two from causing in relative movement and dragging, and then make switching part fracture inefficacy. Through set up protection piece inside battery monomer structure and protect the switching part to improve the stability of switching part in transfer and installation, and then improve the single battery and install the free battery of this battery and the job stabilization nature of device.

Description

Battery monomer, battery and device of power consumption

Technical Field

The application relates to the technical field of batteries, in particular to a battery monomer, a battery and a device for power utilization.

Background

With the development of modern society, the automobile popularity is more and more extensive. In order to alleviate the environmental problems caused thereby, electric vehicles are gradually standing on the countertops. With the rapid development of the power battery industry.

The core of the power battery industry is the battery cell. The battery cell includes an electrode terminal, an electrode assembly, and an adaptor member, and the electrode assembly transfers energy to the electrode terminal through the adaptor member. The adapter component may cause safety issues due to improper installation when assembling and using the battery. Therefore, how to mount the adapter component to enhance the safety of the battery is an urgent technical problem to be solved in the battery technology.

Disclosure of Invention

The application provides a device of battery monomer, battery and power consumption can optimize battery mounting structure, improves the stability in battery equipment or the working process.

In a first aspect, embodiments of the present application provide a battery cell including an electrode assembly, an electrode terminal, an adaptor member, and a protector member. The adapter part comprises a first adapter part and a second adapter part, the first adapter part is used for being electrically connected with the electrode assembly, the second adapter part is used for being electrically connected with the electrode terminal, the second adapter part is bent relative to the first adapter part to form a containing part, and at least part of the protection piece is located in the containing part formed by the first adapter part and the second adapter part.

According to an embodiment of the application, the protection piece comprises a main body portion and a notch arranged on the edge of the main body portion, the main body portion is located in an accommodating portion formed by the first adapter portion and the second adapter portion, and the notch is used for avoiding a bending area of the first adapter portion relative to the second adapter portion.

According to one embodiment of the present application, the protector further includes a mounting flange connected to an edge of the main body portion, the mounting flange extending toward the electrode assembly and an end of the mounting flange abutting against the electrode assembly.

According to an embodiment of the application, the first switching part is further provided with a guide hole, the protection part is provided with a connecting column corresponding to the guide hole, and the connecting column is fixed in the guide hole.

According to an embodiment of the application, battery monomer still includes support piece and the end cover piece of range upon range of installation, and electrode terminal wears to locate behind the mounting hole on end cover piece and the support piece and is connected with second switching portion, and the protection piece passes through support piece and end cover piece butt.

According to one embodiment of the present application, the supporter includes a support body and a support flange connected to a side of the support body facing the protector for spacing the support body from the protector, an end of the support flange abutting against the protector.

According to an embodiment of the application, the support further includes a support portion, the support portion is mounted on a side of the support flange facing the protection member, and the support portion passes through the notch to abut against the electrode assembly in a direction in which the protection member abuts against the electrode assembly.

According to an embodiment of the application, the battery cell further comprises a battery shell, the battery shell is sleeved on the electrode assembly, a step structure is arranged at the end of the electrode assembly along the abutting direction of the protection member and the electrode assembly, the step structure comprises an abutting surface, the abutting surface is arranged along the direction perpendicular to the abutting direction of the protection member and the electrode assembly, and the mounting flange and the supporting portion are respectively abutted to different regions of the abutting surface.

In a second aspect, embodiments of the present application provide a battery, where the battery includes a battery cell as described above.

In a third aspect, an embodiment of the present application provides an electric device, where the electric device includes the battery as described above.

The device of battery monomer, battery and power consumption that this application embodiment provided, the part that the protection piece is located the accommodation portion that first switching portion of switching part and second switching portion formed can provide the support for between first switching portion and the second switching portion, prevent that the metal fillings that first switching portion and second switching portion contact friction produced from causing the battery monomer short circuit on the one hand, on the other hand reduces the clearance between first switching portion and the second switching portion, prevent that the two from causing in relative movement and dragging, and then make the switching part fracture inefficacy. Through set up protection piece inside battery monomer structure and protect the switching part to improve the stability of switching part in transfer and installation, and then improve the single battery and install the free battery of this battery and the job stabilization nature of device.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic illustration of a partial structure of a vehicle according to some embodiments of the present application;

FIG. 2 is a perspective view of a battery according to some embodiments of the present disclosure;

fig. 3 is a schematic perspective view of a battery cell according to some embodiments of the present disclosure;

fig. 4 is a schematic diagram of an exploded structure of a battery cell according to some embodiments of the present disclosure;

FIG. 5 is a schematic view of an adapter component and protector assembly according to some embodiments of the present disclosure;

FIG. 6 is a schematic view of an adapter component, a protector, a support, and an end cap piece assembly according to some embodiments of the present disclosure;

FIG. 7 is a top view of the electrode terminals mounted on the end cap sheet in accordance with some embodiments of the present application;

FIG. 8 is a partial cross-sectional view taken at A-A of FIG. 7;

FIG. 9 is a partial cross-sectional view taken at B-B of FIG. 7;

FIG. 10 is a perspective view of an interposer component according to some embodiments of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The inventor finds that short circuits often occur inside the battery cell, and attempts to provide an insulating member at a portion where the short circuit may occur for protection are made, but none of the problems is solved, and then, through analysis, it is found that: the switching part inside the battery monomer needs to be bent according to a preset trace in the assembling process, but when the switching part is bent, the switching part may collide with other parts, metal chips fall off, and the metal chips enter the battery to cause short circuit inside the battery monomer. Based on the discovery of the inventor, the application provides a novel battery cell to avoid the internal short circuit of the battery cell.

In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiments of the present application. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in an encapsulation manner: the cylindrical battery monomer, the square battery monomer and the soft package battery monomer are not limited in the embodiment of the application.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charging or discharging of battery monomer.

The technical scheme described in the embodiment of the application is suitable for various power utilization devices, such as mobile phones, portable equipment, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships, spacecrafts and the like, and the spacecrafts comprise airplanes, rockets, space shuttles, spacecrafts and the like.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to be applied to the above-described devices, but may also be applied to all devices using batteries, and for brevity of description, the following embodiments are all described by taking an electric vehicle as an example.

For example, as shown in fig. 1, which is a schematic structural diagram of a vehicle 300 according to an embodiment of the present disclosure, the vehicle 300 may be a fuel-oil vehicle, a gas-fired vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, or an extended range vehicle. The vehicle 300 may be provided with a driving motor 311, a controller 312, wheels 313 and a battery 200 inside, wherein the controller 312 is configured to control the battery 200 to supply power to the driving motor 311 so as to drive the wheels 313 to rotate. For example, the battery 200 may be provided at the bottom or the head or tail of the vehicle 300. The battery 200 may be used for powering the vehicle 300, for example, the battery 200 may be used as an operating power source for the vehicle 300 for circuitry of the vehicle 300, for example, for power requirements for operation during start-up, navigation, and operation of the vehicle 300. In another embodiment of the present application, the battery 200 may be used not only as an operation power source of the vehicle 300 but also as a driving power source of the vehicle 300 instead of or in part of fuel or natural gas to provide driving power to the vehicle 300.

In order to meet different power requirements, the battery may include a plurality of battery cells, wherein the plurality of battery cells may be connected in series or in parallel or in series-parallel, and the series-parallel refers to a mixture of series connection and parallel connection. The battery may also be referred to as a battery pack. Alternatively, a plurality of battery cells may be connected in series or in parallel or in series-parallel to form a battery module, and a plurality of battery modules may be connected in series or in parallel or in series-parallel to form a battery. That is, a plurality of battery cells may directly constitute a battery, or a battery module may be first constituted and then a battery may be constituted.

For example, as shown in fig. 2, a schematic diagram of a battery 200 according to an embodiment of the present disclosure, the battery 200 may include a plurality of battery cells 100. The battery 200 may further include a case (or cover), the case is hollow, and the plurality of battery cells 100 are accommodated in the case. As shown in FIG. 2, the housing may comprise two parts, referred to herein as a first part 222 and a second part 223, respectively, the first part 222 and the second part 223 snap together. The shape of the first portion 222 and the second portion 223 may be determined according to the shape of the combination of the plurality of battery cells 100, and the first portion 222 and the second portion 223 may each have one opening. For example, each of the first portion 222 and the second portion 223 may be a hollow rectangular parallelepiped and only one surface of each may be an opening surface, the opening of the first portion 222 and the opening of the second portion 223 are oppositely disposed, and the first portion 222 and the second portion 223 are fastened to each other to form a box body having a closed chamber. The plurality of battery cells 100 can be arranged in a box formed by buckling the first part 222 and the second part 223 after being mutually connected in parallel or in series-parallel combination through the adapter plates 230.

The number of the battery cells 100 may be set to any number according to different power requirements. A plurality of battery cells 100 may be connected in series, parallel, or series-parallel with each other through the interposer 230 to achieve a larger capacity or power. Since the number of the battery cells 100 included in each battery 200 may be large, the battery cells 100 may be arranged in groups for convenience of installation, each group of the battery cells 100 constituting a battery module. The number of the battery cells 100 included in the battery module is not limited and may be set as required. For example, fig. 3 is an example of a battery module. The battery may include a plurality of battery modules, which may be connected in series, parallel, or series-parallel.

As shown in fig. 4, which is a schematic structural view of a battery cell 100 according to some embodiments of the present disclosure, the battery cell 100 includes an electrode assembly 110, an electrode terminal 120, an adapter member 130, and a protector 140. The electrode assembly 110 is electrically connected to the electrode terminal 120 through the adaptor 130, and the electrode terminal 120 is connected to other battery cells 100, the battery 200, or an external load, so as to input and output current to and from the electrode assembly 110 in the battery cell 100.

The adaptor part 130 includes a first adaptor part 131 for electrical connection with the electrode assembly 110 and a second adaptor part 132 for electrical connection with the electrode terminal 120, and the second adaptor part 132 is bent with respect to the first adaptor part 131. The second adaptor part 132 is bent with respect to the first adaptor part 131 so that both ends of the adaptor part 130 can be connected to the electrode assembly 110 and the electrode terminal 120, respectively, due to the volume limitation of the battery cell 100 and the limited space for installing the adaptor part 130 in the battery cell 100.

As shown in fig. 4 and 5, the second adapter portion 132 is bent relative to the first adapter portion 131 to form a receiving portion 133, and at least a portion of the protection member 140 is located in the receiving portion 133 formed by the first adapter portion 131 and the second adapter portion 132. The protection member 140 is disposed between the first adaptor portion 131 and the second adaptor portion 132, and the protection member 140 can space the first adaptor portion 131 and the second adaptor portion 132 apart from each other, so as to prevent the first adaptor portion 131 and the second adaptor portion 132 from contacting and rubbing to generate metal debris. For example, when the bent adapter member 130 is assembled to the electrode assembly 110 or when the electrode assembly 110 vibrates, the first adapter portion 131 and the second adapter portion 132 may move relative to each other if there is no fixed structure between the first adapter portion 131 and the second adapter portion 132, and the protector 140 may be disposed between the first adapter portion 131 and the second adapter portion 132 to prevent the first adapter portion 131 and the second adapter portion 132 from moving relative to each other and contacting each other, thereby protecting the adapter member 130.

According to the battery cell 100 provided by the embodiment of the application, the protection piece 140 is arranged to protect the stability of the adapter part 130 in the transferring or installing process, and further the working stability of the battery cell 100 is improved. The protection member 140 is located in the receiving portion 133 formed by the first adaptor portion 131 and the second adaptor portion 132, so as to provide support between the first adaptor portion 131 and the second adaptor portion 132, on one hand, prevent the first adaptor portion 131 and the second adaptor portion 132 from contacting and rubbing to generate metal chips to cause short circuit, on the other hand, reduce the gap between the first adaptor portion 131 and the second adaptor portion 132, and prevent the first adaptor portion 131 and the second adaptor portion 132 from pulling and causing the breakage and failure of the adaptor portions during relative movement.

In some embodiments, the protection member 140 includes a main body portion 141 and a notch 142 disposed at an edge of the main body portion 141, the main body portion 141 is located in the receiving portion 133 formed by the first adaptor portion 131 and the second adaptor portion 132, and the notch 142 is used for avoiding a bending region of the first adaptor portion 131 relative to the second adaptor portion 132. The notch 142 is formed in the edge of the protection member 140 to guide the mounting position of the second adapter 132 of the adapter member 130 relative to the bending region of the first adapter 131, so that the bent portion of the second adapter 132 relative to the first adapter 131 is prevented from exceeding the periphery of the electrode assembly 110 too much, and the outer side surface of the adapter member 130 is prevented from contacting the battery case 150 sleeved on the periphery of the electrode assembly 110 or colliding with the battery case 150 too closely. The notch 142 at the edge of the protection member 140 can also guide the installation direction between the protection member 140 and the adaptor member 130, thereby improving the assembly efficiency of the battery cell 100.

The first transfer portion 131 is mounted on the electrode assembly 110 such that a space exists between the main body portion 141 of the protector 140 and the electrode assembly 110. In some embodiments, the protector 140 further includes a mounting flange 143, the mounting flange 143 being connected to an edge of the body portion 141, the mounting flange 143 extending toward the electrode assembly 110 and an end of the mounting flange 143 abutting the electrode assembly 110. Optionally, the mounting flange 143 is circumferentially disposed along the edge of the main body portion 141 of the protector 140 to allow the protector 140 to abut the end of the electrode assembly 110 as fully as possible.

In order to improve the connection stability between the adaptor member 130 and the protector 140, the first adaptor portion 131 may be fixed to the main body portion 141. Specifically, as shown in fig. 4 and 6, the first transfer portion 131 is provided with a guide hole 134, the main body portion 141 of the protector 140 is provided with a connection post 144 corresponding to the guide hole 134, and the connection post 144 is fixed in the guide hole 134. The guide holes 134 may be provided at a region outside the structure where the first junction 131 is connected to the electrode assembly 110, and the guide holes 134 are symmetrically disposed at the first junction 131. The guide holes 134 and the connecting posts 144 can be used to guide the mounting position of the protection member 140 on the first transfer portion 131, in addition to ensuring the connection stability between the protection member 140 and the first transfer portion 131, so as to facilitate the quick mounting of the transfer member 130 and the protection member 140. During assembly, the connecting post 144 of the protecting member 140 is inserted into the guiding hole 134 of the first transfer portion 131. The connecting post 144 may be directly injection molded with the protector 140. The protector 140 and the connecting post 144 may be made of a hot melt material, and after the connecting post 144 is inserted into the guide hole 134, the protector 140 may be fixed to the first transfer portion 131 by hot melting and cooling the connecting post 144.

In some embodiments, the battery cell 100 further includes a support member 160 and an end cap piece 170 which are stacked, as shown in fig. 4 and 7 to 9, the electrode terminal 120 is connected to the second adaptor 132 after passing through the end cap piece 170 and the mounting hole 171 of the support member 160, and the protection member 140 abuts against the end cap piece 170 through the support member 160. Alternatively, the support member 160 is made of an insulating material, and the end cap sheet 170 is mounted to the end of the battery case 150 for sealing the battery cell 100. When the electrode terminal 120 is connected to the second adaptor 132 through the mounting holes 171 of the end cover 170 and the supporter 160, opposite sides of the supporter 160 are respectively abutted against the second adaptor 132 and the end cover 170, and the supporter 160 made of an insulating material can prevent the end cover 170 from directly contacting the second adaptor 132 to cause a short circuit.

In some embodiments, the support 160 includes a support body 161 and a support flange 162, the support flange 162 is connected to a side of the support body 161 facing the protector 140, and the support body 161 is spaced apart from the protector 140 by the support flange 162. The end of the support flange 162 abuts against the protection member 140, that is, the end of the support flange 162 abuts against the main body 141 of the protection member 140, so as to ensure the supporting function of the support member 160, prevent the protection member 140 from being pressed into the support member 160 to cause uneven stress, conveniently reserve an installation space for connecting the second adaptor portion 132 with the electrode terminal 120, and limit the second adaptor portion 132 in the installation space, thereby protecting the second adaptor member 132 from colliding with other components.

In the structural design of the adapting member 130, the adapting member 130 can be configured as a multi-stage bending structure to meet the design requirements of different types of battery cells 100. As shown in fig. 10, the adapting member 130 may be provided in a two-stage structure having a U-shape, or as shown in fig. 4 and 8, the adapting member 130 may be provided in a three-stage structure having an S-shape. Therefore, the support flange 162 provided on the support member 160 can also facilitate the reservation of installation space for the adaptor part 130 with different structures, or for other components in the battery cell 100, so that the internal structure design of the battery cell 100 is more flexible. Particularly, when the adaptor member 130 is configured as an S-shaped three-stage structure, as shown in fig. 8, the second adaptor portion 132 includes two first connecting portions 1321 and two second connecting portions 1322 which are bent relatively, the second connecting portion 1322 is connected to the first adaptor portion 131, the first connecting portion 1321 is connected to the electrode terminal 120, an end portion of the support flange 162 is configured to abut against the main body portion 141 of the protection member 140, the support flange 162 has a thickness in a direction perpendicular to the abutting direction of the protection member 140 and the electrode assembly 110, an installation space can be reserved for the bent second adaptor portion 132, and the support flange 162 can also provide support for the two relatively bent connecting portions of the second adaptor portion 132, so that the two relatively bent connecting portions of the second adaptor portion 132 are prevented from being easily pulled and deformed under the action of an external force, and the installation stability of the second adaptor portion 132.

Referring to fig. 4, 7 to 9, the support flange 162 may be circumferentially disposed along the edge of the support body 161 in the direction in which the protector 140 abuts the electrode assembly 110, so that the edge of the support body 161 abuts the protector 140 more sufficiently. And the outer diameter of the supporting flange 162 is smaller than that of the mounting flange 143 to ensure that the supporting member 160 can stably abut against the main body 141. The support flange 162 is prevented from being excessively large in outer diameter to cause an excessively large inner diameter of the support flange 162, so that the supporter 160 is covered on the outer periphery of the protector 140, the support flange 162 of the supporter 160 fails to sufficiently exert the abutting and fixing function on the protector 140, and the protector 140 is partially vibrated when the electrode assembly 110 is vibrated. And the support flange 162 has an excessively large outer diameter to occupy an inner installation space of the battery cell 100.

In some embodiments, the support 160 further includes a support portion 163, and the support portion 163 is mounted on a side of the support flange 162 facing the protection member 140, and the support portion 163 abuts against the electrode assembly 110 through the gap in a direction in which the protection member 140 abuts against the electrode assembly 110. By providing the support portion 163 on the support flange 162, the support portion 163 and the mounting flange 143 of the protector 140 respectively act on different positions of the electrode assembly 110. The supporter 160 and the protector 140 cooperate with each other to more fully abut the electrode assembly 110 when the electrode assembly 110 vibrates. The support portion 163 and the support flange 162 may be integrally injection molded, so as to ensure the connection stability of the support portion 163 and the support flange 162.

In addition, in a plane perpendicular to the abutting direction of the protector 140 and the electrode assembly 110, there is a space between the outer peripheries of the supporter 160 and the protector 140 and the battery case 150, preventing the supporter 160 and the protector 140 from colliding with the battery case 150, and facilitating the installation of the supporter 160 and the protector 140.

In some embodiments, a transition structure is provided between the end of the electrode assembly 110 and the middle of the electrode assembly 110 in the direction in which the protector 140 abuts the electrode assembly 110 such that the cross-sectional area of the end of the electrode assembly 110 is smaller than the cross-sectional area of the middle of the electrode assembly 110, and the transition structure may be an inclined surface connecting the end and the middle of the electrode assembly 110. Alternatively, the transition structure may be provided as a step structure 111, the step structure 111 including an abutment surface 112, the abutment surface 112 being provided in a direction perpendicular to the direction in which the protector 140 abuts the electrode assembly 110, and the mounting flange 143 and the support portion 163 abutting different regions of the abutment surface 112, respectively. The transition structure is arranged on the electrode assembly 110 to plan the abutting position of the protection member 140 on the electrode assembly 110, so that the installation space is saved, and the energy density of the battery cell 100 is improved.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it is to be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms may be understood by those skilled in the art according to specific situations.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A battery cell, comprising:

an electrode assembly;

an electrode terminal;

an adaptor member including a first adaptor portion for electrical connection with the electrode assembly and a second adaptor portion for electrical connection with the electrode terminal, the second adaptor portion being bent with respect to the first adaptor portion to form a receiving portion; and

and at least part of the protection piece is positioned in the accommodating part formed by the first transfer part and the second transfer part.

2. The battery cell as claimed in claim 1, wherein the protection member includes a main body portion and a notch disposed at an edge of the main body portion, the main body portion is located in the receiving portion formed by the first adaptor portion and the second adaptor portion, and the notch is configured to avoid a bending region of the first adaptor portion relative to the second adaptor portion.

3. The battery cell as recited in claim 2 wherein the protector further comprises a mounting flange connected to an edge of the body portion, the mounting flange extending toward the electrode assembly and the mounting flange end abutting the electrode assembly.

4. The battery cell as claimed in claim 1, wherein the first transfer portion is further provided with a guide hole, and the protection member is provided with a connection post corresponding to the guide hole, the connection post being fixed in the guide hole.

5. The battery cell as claimed in claim 3, further comprising an end cap and a support member, wherein the end cap and the support member are stacked, the electrode terminal is inserted into the mounting hole of the end cap and the support member and then connected to the second adaptor portion, and the protection member abuts against the end cap via the support member.

6. The battery cell as recited in claim 5, wherein the supporter includes a support body and a support flange connected to a side of the support body facing the protector for spacing the support body from the protector, an end of the support flange abutting the protector.

7. The battery cell as recited in claim 6 wherein the support member further comprises a support portion mounted on a side of the support flange facing the protection member, the support portion abutting the electrode assembly through the notch in a direction in which the protection member abuts the electrode assembly.

8. The battery cell as recited in claim 7, further comprising a battery case, wherein the battery case is fitted over the electrode assembly, a step structure is formed at an end of the electrode assembly in a direction in which the protection member abuts against the electrode assembly, the step structure includes an abutting surface that is arranged in a direction perpendicular to the direction in which the protection member abuts against the electrode assembly, and the mounting flange and the support portion abut against different regions of the abutting surface, respectively.

9. A battery comprising the battery cell according to any one of claims 1 to 8.

10. An electrical device comprising the battery of claim 9.