Battery cell, battery, and power-consuming device

Abstract

Battery cell comprising: an electrode assembly; a housing for receiving the electrode assembly, a wall portion of the housing comprising a base body and a flap, the base body being provided with a first through-hole, the flap being provided annularly around the first through-hole, the base body and the flap forming a one-piece structure; a sealing member, at least a part of the sealing member being provided annularly around the first through-hole; an electrode terminal electrically connected to the electrode assembly, wherein at least a portion of the electrode terminal is located in a space enclosed by the flap, and wherein at least a portion of the sealing element is clamped between the electrode terminal and the base body; a first insulating member located between the flap and the electrode terminal to separate the flap and the electrode terminal; wherein the flap comprises a pressing portion and a first connecting portion, wherein the first connecting portion connects the base body to the pressing portion, wherein the pressing portion is pressed against the electrode terminal by the first insulating member to clamp the sealing member between the electrode terminal and the base body, wherein at least a part of the projection of the pressing portion and the electrode terminal overlaps along a thickness direction of the base body.

Description

[0001] This application claims priority to Chinese patent applications No. 202310272167.2 entitled “BATTERY CELL, BATTERY, AND POWER CONSUMPTION DEVICE,” filed on March 20, 2023, with the State Intellectual Property Office of China, which are incorporated by reference in their entirety as part of the present application. TECHNICAL FIELD

[0002] The present application relates to the field of sealing technology, in particular to a battery cell, a battery and a power-consuming device. STATE OF THE ART

[0003] A battery cell is considered the smallest unit of a battery and typically consists of a case body and an electrode assembly. The case consists of a case body and an end cap. The electrode assembly is located inside the case body, which is filled with an electrolyte. The electrode assembly reacts electrochemically with the electrolyte to achieve the charging and discharging of the battery cell. The end cap covers the case body to seal the electrolyte inside the case body. However, in practice, the electrolyte is prone to leakage, thereby affecting the performance of the battery cells.

[0004] The above explanations are intended only to convey technical information of the prior art relevant to the present application and do not necessarily represent the prior art. DISCLOSURE OF APPLICATION

[0005] The purpose of embodiments of the present application is to provide a battery cell, a battery, and a power consuming device, including, but not limited to, solving the technical problem that an electrolyte solution of the battery cell is prone to leakage.

[0006] The technical solutions used in the embodiments of the present application are as follows:

[0007] According to a first aspect, a battery cell is provided which comprises an electrode assembly, a housing, a sealing element, an electrode terminal, and a first insulating element. The housing serves to accommodate the electrode assembly. A wall portion of the housing comprises a base body and a flap. The base body is provided with a first through-hole. The flap is provided in a ring shape around the first through-hole. The base body and the flap form a one-piece structure. At least a part of the sealing element is provided in a ring shape around the first through-hole. The electrode terminal is electrically connected to the electrode assembly. At least a part of the electrode terminal is located in a space enclosed by the flap, while at least a part of the sealing element is clamped between the electrode terminal and the base body.The first insulating member is located between the flap and the electrode terminal to separate the flap and the electrode terminal. The flap includes a pressing portion and a first connecting portion, the first connecting portion connecting the base body to the pressing portion. The pressing portion is pressed against the electrode terminal by the first insulating member to clamp the sealing member between the electrode terminal and the base body. At least a portion of the projection of the pressing portion and the electrode terminal overlaps along a thickness direction of the base body.

[0008] In the battery cell of the embodiment of the present application, the pressing portion of the flap presses against the electrode terminal through the first insulating member, whereby the electrode terminal and the base body pinch the sealing member to achieve sealing at the electrode terminals. At the same time, at least a part of the projection of the pressing portion and the electrode terminal overlaps along the thickness direction of the base body, that is, at least a part of the electrode terminal is located between the base body and the pressing portion. In this way, the pressing portion can be directly compressed by the first insulating member to enhance the pressing effect of the electrode terminal pressing against the sealing member. This reduces the risk of the pressing portion folding out due to the electrode terminal being subjected to an external tensile force.Furthermore, the sealing element is capable of stably and reliably sealing between the electrode terminal and the base body to reduce the risk of the electrolyte in the casing between the electrode terminal and the base body leaking, which is conducive to improving the performance of the battery cell.

[0009] In one embodiment of the present application, the pressing portion extends along a circumferential direction of the flap and forms an annular structure.

[0010] In the battery cell of the embodiment of the present application, the pressing portion extends along the circumferential direction of the flap and forms an annular structure, which can increase the difficulty of unfolding the pressing portion and reduce the risk of electrolyte leakage.

[0011] In one embodiment of the present application, the pressing portion encloses a second through-hole. The electrode terminal comprises a flange portion and a first connecting segment. The first connecting segment passes through the second through-hole. The flange portion is provided annularly on an outer peripheral wall of the first connecting segment, and the flange portion is located in a space enclosed by the flap. At least a part of the first insulating member is located between the flange portion and the pressing portion, and at least a part of the sealing member is located between the first connecting segment and the base body.

[0012] In the battery cell of the embodiment of the present application, the pressing portion is capable of compressing the flange portion so that the electrode terminal can be compressed on the entire circumference, so that the pressing portion is capable of pressing the sealing member more stably and reliably, thereby reducing the risk of electrolyte leakage.

[0013] In one embodiment of the present application, the electrode terminal further comprises a second connecting segment. One end of the second connecting segment is connected to an end portion of the first connecting segment facing away from the pressing portion. The sealing element encloses a third through-hole, and the second connecting segment is passed through the third through-hole.

[0014] In the battery cell of the embodiment of the present application, the second connection segment is passed through the third through-hole, which can facilitate the electrical connection of the electrode assembly to the second connection segment to enable the electrical power input and output of the battery cell.

[0015] In one embodiment of the present application, a hole diameter of the second through hole is D1, wherein an outer diameter of the flange portion is d1, wherein (d1−D1)d1≥0.05 and / or (d1−D1)d1≥0.4.

[0016] In the battery cell of the embodiment of the present application, (d1−D1)d1≥0.1, so that the part of the pressing portion that presses directly against the electrode terminal through the first insulating member has a certain pressing area, and the pressing portion is able to press stably against the electrode terminal, thereby reducing the risk of electrolyte leakage. In addition, (d1−D1)d1≥0.4, so that the hole diameter of the second through-hole and the cross-sectional area of the first connecting segment are appropriate, whereby the electrode terminal has good overcurrent capability.

[0017] In one embodiment of the present application, a hole diameter of the second through hole is D1, wherein an outer diameter of the flange portion is d1, wherein d1 - D1 ≥ 0.8mm and / or d1-D1≤3mm.

[0018] In the battery cell of the embodiment of the present application, d1 - D1 ≥ 0.8 mm, so the length of the extension of the pressing portion toward the first connection segment is long and the risk of the pressing portion unfolding is low, achieving reliable sealing and a low risk of leakage. Furthermore, d1 - D1 ≤ 3 mm, so the length of the extension of the pressing portion toward the first connection segment is appropriate, and the flap is easy to manufacture and bend, allowing for convenient manufacturing.

[0019] In one embodiment of the present application, a hole diameter of the second through hole is D1, wherein an outer diameter of the first connecting segment is d2, wherein D1 - d2 ≥ 0.5mm and / or D1 - d2 ≤ 2.5mm.

[0020] In the battery cell of the embodiment of the present application, D1 - d2 ≥ 0.5 mm, so that a certain distance exists between an inner wall of the second through-hole and an outer peripheral wall of the first connecting segment, which can accommodate a portion of the first insulating member with a certain thickness to reduce the leakage current generation of the first connecting segment. Furthermore, D1 - d2 ≤ 2.5 mm, so that the outer diameter of the first connecting segment can be set large enough to provide the electrode terminal with good overcurrent capability.

[0021] In one embodiment of the present application, the first connecting portion is provided annularly around the first insulating member and encloses a fourth through-hole, wherein a hole diameter of the fourth through-hole is D2 and an outer diameter of the flange portion is d1, wherein D2 - d1 ≥ 0.5mm and / or D2 - d1 ≤ 2.5mm.

[0022] In the battery cell of the embodiment of the present application, D2 - d1 ≥ 0.5 mm, so that a certain distance is maintained between an inner wall of the fourth through-hole and an outer peripheral wall of the flange portion, and the part of the first insulating member within the distance has a certain thickness, which reduces the risk of short circuit due to the intrusion of a foreign matter such as a metal burr into the part. Furthermore, D2 - d1 ≤ 2.5 mm, so that the force arm of the pressing portion is not too large, the risk of the pressing portion being unfolded is low, and the risk of electrolyte leakage is low.

[0023] In one embodiment of the present application, the first insulating element comprises a first insulating portion and a second insulating portion that are connected to each other. The first insulating portion is wrapped around the flange portion, and the second insulating portion is located between an inner wall of the second through-hole and an outer peripheral wall of the first connecting segment, with the pressing portion being pressed against a surface of the first insulating portion facing away from the base body.

[0024] In the battery cell of the embodiment of the present application, the first insulating portion can insulate and separate the flange portion from the lid, and the second insulating portion can separate the first connecting segment from the pressing portion, so that the insulation of the lid and the electrode terminal is realized.

[0025] In one embodiment of the present application, the second insulating portion protrudes from the surface of the pressing portion facing away from the base body; or the surface of the second insulating portion facing away from the base body is flush with the surface of the pressing portion facing away from the base body.

[0026] By means of the battery cell of the embodiment of the present application, the risk of leakage current formation is reduced.

[0027] In one embodiment of the present application, at least a part of the projection of the pressing portion and the sealing element overlaps along a thickness direction of the main body.

[0028] In the battery cell of the embodiment of the present application, at least a part of the sealing member is located between the main body and the pressing portion, so that the pressing portion can directly press the part of the sealing member located between the main body and the pressing portion through the first insulating member and the electrode terminal, whereby the pressing effect of the sealing member can be improved and the risk of electrolyte leakage can be reduced.

[0029] In one embodiment of the present application, a part of the flap is bent in the direction of an axis of the first through hole.

[0030] In the battery cell of the embodiment of the present application, a part of the flap is bent to form a pressing portion, which is easy to process and manufacture.

[0031] In one embodiment of the present application, the Brinell hardness of the pressing portion is in a range of 10 HBW to 100 HBW.

[0032] In the battery cell of the embodiment of the present application, the range of the Brinell hardness of the pressing portion is limited to the above range so that the pressing portion has sufficient hardness to press against the electrode terminals, and the flap can be bent to form the pressing portion.

[0033] In one embodiment of the present application, the material of the pressing portion comprises an aluminum alloy.

[0034] In the battery cell of the embodiment of the present application, the pressing portion is made of an aluminum alloy. On the one hand, the aluminum alloy is easy to obtain and inexpensive, which contributes to reducing the production costs of the housing. On the other hand, the aluminum alloy also has a suitable hardness to meet the bending, forming, and compression requirements of the pressing portion.

[0035] In one embodiment of the present application, a thickness of the first connecting portion is greater than or equal to 0.8 mm, and / or, a thickness of the first connecting portion is less than or equal to 1.5 mm.

[0036] In the battery cell of the embodiment of the present application, the thickness of the first connecting portion is greater than or equal to 0.8 mm, and the first connecting portion has good structural strength, which can stably support the pressing portion, thereby reducing the risk of the pressing portion folding out. The thickness h1 of the first connecting portion 1121 is less than or equal to 1.5 mm, so the thickness of the first connecting portion 1121 is not designed to be too thick, which can reduce material accumulation, reduce volume, and improve the volume utilization rate.

[0037] In one embodiment of the present application, a thickness of the pressing portion is greater than or equal to 0.8 mm, and / or, a thickness of the pressing portion is less than or equal to 1.5 mm.

[0038] In the battery cell of the embodiment of the present application, the thickness of the pressing portion is greater than or equal to 0.8 mm, and the pressing portion has a certain thickness and is difficult to deform, so that the pressing portion is pressed against the electrode terminal. The pressing portion has good resistance to outward tipping, and the risk of electrolyte leakage is reduced. The thickness h2 of the pressing portion is less than or equal to 1.5 mm, so that the thickness of the pressing portion is not set too large and has less impact on the dimensions of the electrode terminals and other components, which contributes to reducing the volume of the battery cell and improving the energy density of the battery.

[0039] In one embodiment of the present application, the flap further comprises a second connecting portion connecting the first connecting portion to the pressing portion, wherein the second connecting portion is formed with an inverted beveled surface on its surface facing away from the electrode terminal.

[0040] In the battery cell of the embodiment of the present application, the arrangement of the inverted, beveled surface is conducive to bending the flap, and during processing, the tool subjected to the inverted force is also better controlled. The processing of the flap is simple and fast.

[0041] In one embodiment of the present application, an angle between the inverted beveled surface and an axis of the flap is between 30° and 60°.

[0042] In the battery cell of the embodiment of the present application, the angle α between the inverted beveled surface and an axis of the flap is set within the above range. The structural strength of the second connecting portion is good, and the pressing portion is not easily folded out.

[0043] In one embodiment of the present application, the ratio of the dimension of the inverted chamfered surface in a thickness direction of the first connecting portion to the thickness of the first connecting portion is greater than or equal to 0.3, and / or the ratio of the dimension of the inverted chamfered surface in a thickness direction of the connecting portion to the thickness of the connecting portion is less than or equal to 0.6.

[0044] In the battery cell of the embodiment of the present application, the ratio of the dimension of the inverted tapered surface in the thickness direction of the first connecting portion to the thickness of the first connecting portion is greater than or equal to 0.3, so that the area of the inverted tapered surface is large, thereby facilitating the processing of the door 112. The ratio of the dimension of the inverted tapered surface in the thickness direction of the first connecting portion to the thickness of the first connecting portion is less than or equal to 0.6. In this way, the inverted tapered surface is not excessively inclined toward the first connecting portion, so that the second connecting portion and the door have good structural strength, thus reducing the risk of electrolyte leakage.

[0045] In one embodiment of the present application, the ratio of the dimension of the inverted tapered surface in a thickness direction of the pressing portion to the thickness of the pressing portion is greater than or equal to 0.3, and / or the ratio of the dimension of the inverted tapered surface in a thickness direction of the pressing portion to the thickness of the pressing portion is less than or equal to 0.6.

[0046] In the battery cell of the embodiment of the present application, the ratio of the dimension of the inverted tapered surface in the thickness direction of the pressing portion to the thickness of the pressing portion is greater than or equal to 0.3. Thus, the area of the inverted tapered surface is large, which facilitates door processing. The ratio of the dimension of the inverted tapered surface in the thickness direction of the pressing portion to the thickness of the pressing portion is less than or equal to 0.6. Thus, the inverted tapered surface is not excessively inclined toward the pressing portion, so that the second connecting portion and the door have good structural strength, thus reducing the risk of electrolyte leakage.

[0047] In one embodiment of the present application, the flap further comprises a third connecting portion connected between the main body and the first connecting portion, wherein the third connecting portion is formed with an inverted rounded surface on a surface of the third connecting portion facing away from the electrode terminal.

[0048] In the battery cell of the embodiment of the present application, an inverted rounded surface is provided to reduce the stress concentration at the junction between the flap and the base body and to reduce the risk of breakage of the flap and the base body.

[0049] In one embodiment of the present application, a radius of the inverted rounded surface is greater than or equal to 0.4 mm.

[0050] In the battery cell of the embodiment of the present application, the radius of the inverted rounded surface is greater than or equal to 0.4 mm, so that the third connecting portion has a certain thickness and reduces the risk of breakage.

[0051] In one embodiment of the present application, the base body is formed on a surface facing away from the flap with an auxiliary groove which is provided opposite the flap and serves to assist in the manufacture of the flap.

[0052] In the battery cell of the embodiment of the present application, the auxiliary groove is pressed out from the main body to obtain a protruding structure, and the manufacturing process of a lid by pressing the protruding structure is simple.

[0053] In one embodiment of the present application, the auxiliary groove has a groove depth of H1, and a height difference between the pressing portion and the main body is H2, where H1H2≥0.1.

[0054] In the battery cell of the embodiment of the present application, H1H2≥0.1 the ratio of the groove depth of the auxiliary groove to the height difference between the pressing portion and the main body, so that the auxiliary groove has a sufficient groove depth and the height of the structure protruding from the main body is high enough, whereby the flap can be easily pressed and processed to obtain the flap.

[0055] In one embodiment of the present application, the housing comprises a housing body and an end cover, wherein the end cover covers an opening of the housing body. A wall portion of the end cover or the housing body forms a wall portion of the housing.

[0056] In the battery cell of the embodiment of the present application, components such as the electrode terminal, the sealing member, etc. are installed on the wall portion of the end cover or the case body.

[0057] According to a second aspect, a battery is provided comprising the above battery cell.

[0058] The battery of the embodiment of the present application uses the above battery cell which has a low risk of leakage, so that the battery has good battery performance and reliability in use.

[0059] According to a third aspect, a power consuming device is provided comprising the above battery.

[0060] The power consumption device of the embodiment of the present application uses the above battery which has a low risk of leakage, so that the power consumption device has good battery performance and reliability in use. PRESENTATION OF REVELATION

[0061] To more clearly illustrate the technical solutions of the embodiments of the present application, the attached drawings used in describing the embodiments are briefly described below. Of course, the attached drawings in the following description are only some of the embodiments of the present application, and those skilled in the art can create other attached drawings based on these drawings without any creative effort. In them: Fig. 1 is a schematic diagram of the structure of a vehicle according to an embodiment of the present application. Fig. 2 is a schematic diagram of the structure of a battery according to an embodiment of the present application. Fig. 3 is a schematic representation of the structure of a battery cell according to an embodiment of the present application. Fig. 4 is a schematic exploded view of a battery cell according to an embodiment of the present application. Fig. 5 a schematic representation of the structure of a housing in Fig. 4, while the housing body is shaded. Fig. 6 a sectional view along the line AA in Fig. 5. Fig. 7 a partially enlarged view of B in Fig. 6. Fig. 8 a schematic exploded view of a housing in Fig. 4, while the housing body is shaded. Fig. 9 a schematic representation of the structure of an end cover in Fig. 8. Fig. 10 a sectional view along the line DD in Fig. 9. Fig. 11 a partially enlarged view of E in Fig. 10. Fig. 12 a partially enlarged view of F in Fig. 11. Fig. 13 a schematic representation of the structure of an electrode terminal of Fig. 8. Fig. 14 a sectional view along the line GG in Fig. 13. List of reference symbols:

[0062] 1000. Vehicle; 1100. Battery; 1200. Control unit; 1300. Motor; 10. Box body; 11. First part; 12. Second part; 20. Battery cell; 100. Casing; 110. End cover; 111. Main body; 1111. First through hole; 1112. Auxiliary groove; 112. Flap; 1121. First connecting portion; 1122. Pressing portion; 1123. Second connecting portion; 1124. Third connecting portion; 1101. Second through hole; 1102. Fourth through hole; 11231. Inverted chamfered surface; 11241. Inverted rounded surface; 120. Electrode terminal; 121. Flange portion; 122. First connecting segment; 123. Second connecting segment; 130. Sealing element; 131. Third through-hole; 140. First insulating element; 141. First insulating section; 142. Second insulating section; 150. Second insulating element; 160. Electrical connection element; 170. Pressure relief mechanism; 180. Housing body; 200. Electrode assembly; 300. Third insulating element. CONCRETE EMBODIMENTS

[0063] The embodiments of the present application are described in detail below, and examples of the embodiments are illustrated in the accompanying drawings, wherein the same or similar elements, or elements having the same or similar functions, are designated by the same or similar reference numerals throughout the specification. The embodiments described below with reference to the accompanying drawings are exemplary and serve to explain the present application and should not be construed as limiting the present application.

[0064] In the descriptions of this application, it should be understood that the orientation or positional relationships indicated by terms such as "length", "width", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "upper", "bottom", "inside", and "outside" are based on the orientation or positional relationships shown in the accompanying drawings and are provided solely for the convenience and brevity of illustrations and descriptions and are not intended to indicate or imply that the mentioned devices or components have a particular orientation or must be constructed and operated in a particular orientation. Therefore, such terms should not be construed as limiting this application.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be interpreted to imply a relative importance or quantity of the specified technical features. Thus, the features defined by "first" and "second" may explicitly or implicitly include one or more of these features. In the descriptions of the present application, "a plurality of" means two or more, unless expressly and specifically stated otherwise.

[0066] In this application, terms such as "install," "connect," "connection," and "repair" should be understood in a broad sense unless explicitly stated or defined otherwise. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; the connection may be a mechanical connection or an electrical connection; or the connection may be a direct connection, an indirect connection via an intermediate medium, an internal communication between two components, or an interaction relationship between two components. A person of ordinary skill in the art can understand the specific meanings of the above terms in this application depending on the specific case.

[0067] In the descriptions of the present application, it should be noted that the term "and / or" in this description only describes an association relationship for describing associated objects and indicates that three relationships can exist. For example, A and / or B can represent the following three cases: only A exists, both A and B exist, and only B exists.

[0068] It should also be noted that in the embodiments of the present application, a like reference number is used to represent a like component or part. For a like component in the embodiments of the present application, a reference number may be indicated by using only one of the components as an example in the figures. It should be understood that for another like component or part, the reference number is also applicable.

[0069] Throughout this application, the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" means that a feature, structure, material, or characteristic described with reference to the embodiment or example is included in at least one embodiment or example of this application. Throughout this specification, exemplary descriptions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics may be appropriately combined in one or more embodiments or examples.Furthermore, a person skilled in the art may integrate or combine various embodiments or examples described in the specification and features of the various embodiments or examples as long as they do not contradict each other.

[0070] Currently, the application of batteries is becoming increasingly extensive due to market developments. Batteries are used not only in energy storage systems such as hydroelectric, thermal, wind, and solar power plants, but also in various electric transportation systems such as electric bicycles, electric motorcycles, electric vehicles, as well as in military equipment, aerospace, and other fields. As the application areas of batteries expand, so too does their market demand.

[0071] A battery cell is considered the smallest unit of a battery and typically consists of a case body and an electrode assembly. The case consists of a case body and an end cap. The electrode assembly is located inside the case body, which is filled with an electrolyte. The electrode assembly reacts electrochemically with the electrolyte to achieve the charging and discharging of the battery cell. The end cap covers the case body to seal the electrolyte inside the case body. However, in practice, the electrolyte is prone to leakage, thereby affecting the performance of the battery cells.

[0072] One of the reasons why the electrolyte leaks easily is that the end cover is provided with an electrode terminal, an insulating member, and a sealing member. An end portion of the flap on the end cover, facing away from the end cover, bends toward the electrode terminal and presses against the insulating member, and the insulating member presses against the electrode terminal to compress the sealing member. The sealing member is deformed after compression, thus forming a tight connection between the electrode terminal and the end cover. In practice, however, when the electrode terminal is subjected to external tensile force, the flap tends to fold outward in the direction away from the electrode terminal, resulting in insufficient compressive force on the sealing member.The sealing effect of the sealing element is not good, and the electrolyte tends to leak from the electrode terminal and end cover, which affects the performance of the battery cell.

[0073] To mitigate the problem of electrolyte leakage, a battery cell is developed with an optimized flap structure that allows the flap to stably and reliably press against the electrode terminal, and the electrode terminal to exert sufficient compressive force on the sealing element. This allows the sealing element to stably and reliably form a seal between the electrode terminal and the end cap, reducing the risk of electrolyte leakage.

[0074] The embodiments of the present application disclose a battery cell, a battery, and a power-consuming device that uses the battery as a power source, wherein the power-consuming device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spaceship, and the like, wherein the electric toy may include stationary or mobile electric toys, such as game consoles, electric cars, electric boats, electric aircraft, etc., and wherein the spaceship may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0075] For ease of illustration, the following embodiments are illustrated using an example of a power-consuming device of an embodiment of the present application as a vehicle 1000.

[0076] As in Fig. 1, shows Fig. 1 is a schematic diagram of the structure of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, a programmable vehicle, and the like. The vehicle 1000 is provided with a battery 1100 inside, and the battery 1100 may be provided at the bottom, front, or rear of the vehicle 1000. The battery 1100 may be used to supply power to the vehicle 1000. For example, the battery 1100 may be used as a power source for operating the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300, wherein the controller 1200 serves to control the battery 1100 to supply power to the motor 1300, e.g.,for the operational power requirements for starting, navigating and driving the vehicle 1000.

[0077] In some embodiments of the present application, the battery 1100 may be used not only as an operating power source for the vehicle 1000, but also as a motive power source for the vehicle 1000, in whole or in part replacing fuel oil or natural gas to provide motive power for the vehicle 1000.

[0078] As in Fig. 2, as one embodiment of the battery 1100, the battery 1100 includes a box body 10 and a battery cell 20, wherein the battery cell 20 is housed in the box body 10, wherein the box body 10 is used to provide a receiving space for the battery cell 20, and the box body 10 can take on various structures. In some embodiments, the box body 10 can include a first part 11 and a second part 12, wherein the first part 11 and the second part 12 are covered with each other, and the first part 11 and the second part 12 together define a receiving space for receiving the battery cell 20. The second part 12 can be a hollow structure and open at one end, while the first part 11 can be a plate-like structure. The first part 11 is covered on an open side of the second part 12, so that the first part 11 and the second part 12 together form the receiving space.The first part 11 and the second part 12 can also be hollow structures and both open on one side, with the open side of the first part 11 covering the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 can have a variety of shapes. For example, it can be cylindrical, rectangular, or other shapes.

[0079] A plurality of battery cells 20 may be provided in the battery 1100, and the plurality of battery cells 20 may be connected in series or in parallel or in a mixed connection, wherein the mixed connection means that the plurality of battery cells 20 are connected in both series and parallel.

[0080] In one embodiment, the plurality of battery cells 20 may be directly connected to one another in series, parallel, or mixed connection, and then the whole formed from the plurality of battery cells 20 is housed in the box body 10. Of course, the battery 1100 may also consist of a plurality of battery cells 20 that are first connected to one another in series, parallel, or mixed connection to form a battery module. Then, the plurality of battery modules are connected to one another in series, parallel, or mixed connection to form an integral whole, which is then housed in the box body 10. The battery 1100 may also include other structures. For example, the battery 1100 may also include a sink component to establish an electrical connection between the plurality of battery cells 20.

[0081] Among other things, each battery cell 20 may be a secondary or primary battery and may also be, but is not limited to, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cell 20 may be cylindrical, flat, rectangular, or other shaped.

[0082] As in Fig. 3, shows Fig. 3 is a schematic representation of the structure of a battery cell 20 according to some embodiments of the present application, and Fig. Figure 4 shows a schematic exploded view of the battery cell 20 according to some embodiments of the present application. The battery cell 20 is the smallest unit that forms the battery. As shown in Figures Fig. 3 and Fig. 4, the battery cell 20 includes a housing 100, an electrode assembly 200, and other functional components, and the housing 100 includes the battery cell 20 and a housing body 180.

[0083] The housing 100 includes an end cover 110 and a housing body 180. The end cover 110 is a component that closes an opening of the housing body 180 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cover 110 can be freely customized to fit the shape of the housing body 180. Optionally, the end cover 110 can be made of a material with a certain hardness and strength (e.g., an aluminum alloy) so that the end cover 110 is less likely to deform during compression and collisions, thereby enabling the battery cell 20 to have higher structural strength and improve safety performance. The material of the end cover 110 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any particular limitations thereon.

[0084] In some embodiments, the end cover 110 may be provided with functional components such as an electrode terminal 120. The electrode terminal 120 may be electrically connected to the electrode assembly 200 via the electrical connector 160 to output or input electrical energy from the battery cell 20. In some embodiments, the end cover 110 may further be provided with a pressure relief mechanism 170 for venting the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. In some embodiments, the end cover 110 may further be provided with a second insulating member 150, which may be used to insulate the electrical connector 160 in the housing body 180 from the end cover 110 to reduce the risk of a short circuit. For example, the second insulating member 150 may be made of plastic, rubber, or the like.

[0085] The housing body 180 is a component that cooperates with the end cover 110 to form an internal environment of the battery cell 20. The formed internal environment can be used to contain the electrode assembly 200, the electrolyte, and other components. The housing body 180 and the end cover 110 can be stand-alone components, and an opening can be provided in the housing body 180. The end cover 110 covers the opening to form an internal environment of the battery cell 20. In one embodiment, the end cover 110 and the housing body 180 can form a common interface before the other components are located in the housing, and then the end cover 110 is caused to cover the housing body 180 when it is necessary to close the interior of the housing body 180. The housing body 180 can have a variety of shapes and sizes, e.g., cylindrical, rectangular, hexagonal, and the like.In one embodiment, the shape of the housing body 180 can be determined based on the specific shape and size of the electrode assembly 200. The material of the housing body 180 can be various, e.g., copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any particular limitations thereon. The electrode assembly 200 is covered with a third insulating member 300, which insulates the electrode assembly 200 from the housing body 180 and thus reduces the risk of a short circuit. The third insulating member 300 can be, for example, a plastic film or the like.

[0086] The electrode assembly 200 is the component within the battery cell 20 where the electrochemical reaction takes place. One or more electrode assemblies 200 may be contained within the housing body 180. The electrode assembly 200 includes a positive electrode, a negative electrode, and an insulating element. During charging and discharging of the battery cell 20, active ions (e.g., lithium ions) are drawn back and forth between the positive and negative electrodes. The insulating element is located between the positive and negative electrodes and may serve to prevent a short circuit between the positive and negative electrodes while allowing the active ions to pass through.

[0087] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode collector and a positive electrode active material provided on at least one surface of the positive electrode collector.

[0088] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative liquid collector and a negative electrode active material provided on at least one surface of the negative electrode collector.

[0089] In some embodiments, the insulating element is an insulating membrane. This application does not impose any particular restrictions on the type of insulating membrane, and any known insulating membrane with a porous structure and good chemical and mechanical stability may be used.

[0090] In some embodiments, the electrode assembly 200 is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0091] In some embodiments, the electrode assembly 200 is a stacked sheet structure.

[0092] In another embodiment of the present application, a battery cell 20 is provided. As shown in the Fig. 3 to 7, the battery cell 20 includes an electrode assembly 200, a housing 100, a sealing member 130, an electrode terminal 120, and a first insulating member 140. The housing 100 is used to accommodate the electrode assembly 200, and a wall portion of the housing 100 includes a base body 111 and a lid 112, wherein the base body 111 is provided with a first through-hole 1111. The lid 112 is provided annularly around the first through-hole 1111, and the base body 111 and the lid 112 form a one-piece structure. At least a part of the sealing member 130 is provided annularly around the first through-hole 1111. The electrode terminal 120 is electrically connected to the electrode assembly 200.At least a part of the electrode terminal 120 is located in the space enclosed by the flap 112, and at least a part of the sealing element 130 is located between the electrode terminal 120 and the base body 111. The first insulating element 140 is located between the flap 112 and the electrode terminal 120 to separate the flap 112 and the electrode terminal 120, wherein the flap 112 comprises a pressing portion 1122 and a first connecting portion 1121, wherein the first connecting portion 1121 connects the base body 111 to the pressing portion 1122. The pressing portion 1122 presses against the electrode terminal 120 through the first insulating member 140 to clamp the electrode terminal 120 and the base body 111 against the sealing member 130, wherein at least a part of the projection of the pressing portion 1122 and the electrode terminal 120 overlaps along the thickness direction of the base body 111.

[0093] The electrode assembly 200 refers to a component in which an electrochemical reaction takes place, and the electrode assembly 200 may be a structure such as a wound structure or a laminated structure as described above.

[0094] The electrode terminal 120 denotes a component that outputs and inputs electrical energy from the battery cell 20, and the electrode terminal 120 is electrically connected to the electrode assembly 200 to realize the component that outputs and inputs electrical energy from the battery cell 20. The electrode terminal 120 can have a variety of shapes, such as columnar, plate-shaped, block-shaped, and the like.

[0095] The housing 100 denotes a shell structure for the battery cell 20, wherein the housing 100 encloses an inner cavity which forms an installation space for the electrode assembly 200.

[0096] A wall section of the housing 100, as in Fig. 3, may denote a front wall, a rear wall, a left wall, a right wall, a top wall, or a bottom wall of the housing 100.

[0097] The wall portion of the housing 100 includes a base body 111 and a flap 112, wherein the base body 111 is a main portion of the wall portion of the housing 100. The base body 111 is provided with a first through-hole 1111, and the first through-hole 1111 may also have a variety of shapes, such as circular, oval, polygonal, and the like.

[0098] The flap 112 denotes a component that protrudes from the surface of the base body 111 and is provided annularly around the first through-hole 1111, and at least a part of the electrode terminal 120 is located in the space enclosed by the flap 112. It is understood that the electrode terminal 120 may be partially or completely arranged in the space enclosed by the flap 112. The electrode terminal 120 may be connected to the electrical connection element 160 and thus to the electrode assembly 200 via the first through-hole 1111 in order to output and input electrical energy to the battery cell 20. As shown in Fig. 7, a portion of the electrode terminal 120 (e.g., the second connection segment 123) facing away from the base body 111 passes through the first through-hole 1111 and is then connected to the electrode assembly 200 through the electrical connection element 160; and, of course, the electrical connection element 160 may pass through the first through-hole 1111 and then be electrically connected to the electrode terminal 120. In some embodiments, a second insulating element 150 is also provided between the electrical connection element 160 and the base body 111, and the second insulating element 150 separates the end cover 110 and the electrical connection element 160 to reduce the risk of a short circuit.

[0099] The flap 112 and the base body 111 are a one-piece structure. For example, the flap 112 and the base body 111 are manufactured by a one-piece process such as extrusion molding, injection molding, die casting, and other molding methods. The flap 112 may be a ring-shaped one-piece structure, and the flap 112 may also be a segmented structure provided in a ring around the circumference of the electrode terminal 120. Among them, the flap 112 and the base body 111 are a one-piece structure, which can reduce the installation process, save costs, and have good structural strength.

[0100] The flap 112 includes a pressing portion 1122 and a first connecting portion 1121. The first connecting portion 1121 is a portion or part of the flap 112 located between the base body 111 and the pressing portion 1122. The first connecting portion 1121 serves as a connection between the pressing portion 1122 and the base body 111 and may also play a supporting role for the pressing portion 1122. The pressing portion 1122 refers to the part of the flap 112 that is pressed against the first insulating member 140. The pressing portion 1122 may be spaced parallel to the base body 111 or may be inclined relative to the base body 111, and its specificity can be designed according to the actual structure and is not limited here.The pressing portion 1122 may be an annular overall structure provided annularly around the electrode terminal 120, and the pressing portion 1122 may also be a segmented structure provided annularly around the circumferential direction of the electrode terminal 120.

[0101] The first insulating element 140 is a component made of an insulating material, and the first insulating element 140 is located between the flap 112 and the electrode terminal 120 to insulate and separate the flap 112 and the electrode terminal 120, thereby reducing the risk of a short circuit. The insulating material can be made of, among other materials, plastic or rubber.

[0102] The sealing element 130 is a component capable of performing a sealing function. At least a portion of the sealing element 130 is clamped between the electrode terminal 120 and the base body 111, and the sealing element 130 is capable of being deformed under the compressive force of the electrode terminal 120 to create a gap seal between the base body 111 and the electrode terminal 120. The sealing element 130 may be, but is not limited to, a sealing ring or a sealing pad. The sealing element 130 may be partially clamped between the electrode terminal 120 and the base body 111, or the entire sealing element 130 may be clamped between the electrode terminal 120 and the base body 111.

[0103] The pressing portion 1122 presses against the electrode terminal 120 through the first insulating member 140, causing the electrode terminal 120 and the base body 111 to clamp the sealing member 130. It can be seen that the pressing portion 1122 presses against the first insulating member 140, the pressing portion 1122 exerts a pressing force on the first insulating member 140, which presses against the electrode terminal 120, so that the sealing member 130 is clamped between the electrode terminal 120 and the base body 111. The electrode terminal 120 presses the sealing element 130 toward the base body 111, so that the sealing element 130 is pressed against the base body 111, and the sealing element 130 is compressed and deformed by the pressure, whereby the sealing of the gap between the base body 111 and the electrode terminal 120 can be realized.The electrolyte in the case body 180 is blocked by the sealing of the sealing member 130 after passing through the first through-hole 1111, thereby making it difficult for the electrolyte to flow out of the battery cell 20 along the gap between the case body 111 and the electrode terminal 120, and reducing the risk of electrolyte leakage of the battery cell 20.

[0104] At least a part of the projection of the pressing portion 1122 and the electrode terminal 120 overlaps along the thickness direction of the base body 111 (see the Fig. 7). It should be understood that a plane perpendicular to the direction shown by the arrow X is defined as the projection plane, as in Fig. 7, and the projection of the pressing portion 1122 onto the projection plane and the projection of the electrode terminal 120 onto the projection plane may also partially or completely overlap.

[0105] In the battery cell of the embodiment of the present application, the pressing portion 1122 of the flap 112 presses against the electrode terminal 120 through the first insulating member 140, causing the electrode terminal 120 and the base body 111 to clamp the sealing member 130 to achieve sealing at the electrode terminal 120. At the same time, at least a part of the projection of the pressing portion 1122 and the electrode terminal 120 overlaps along the thickness direction of the base body 111 (see the Fig. 7), that is, at least a part of the electrode terminal 120 is located between the base body 111 and the pressing portion 1122. In this way, the pressing portion 1122 can be directly compressed by the first insulating member 140 to improve the pressing effect of the electrode terminal 120 against the sealing member 130 and reduce the risk of the pressing portion 1122 folding out because the electrode terminal 120 is subjected to an external tensile force. The sealing member 130 is also capable of stably and reliably sealing between the electrode terminal 120 and the base body 111, thereby reducing the risk of electrolyte leakage in the casing 100 between the electrode terminal 120 and the base body 111, which contributes to improving the performance of the battery cell 20.

[0106] In another embodiment of the present application, as described in the Fig. 4 to 7, the pressing portion 1122 of the battery cell 20 is provided to extend and distribute along the circumferential direction of the flap 112 and form an annular structure.

[0107] The pressing portion 1122 extends and distributes along the circumferential direction of the flap 112, forming an annular structure. It should be understood that the pressing portion 1122 is annular. The shape of the pressing portion 1122 may be various, such as circular, oval, polygonal, and the like.

[0108] In the battery cell 20 of the embodiment of the present application, the pressing portion 1122 is distributed along the circumferential direction of the flap 112 and enclosed to form an annular structure. Such a construction can increase the difficulty of unfolding the pressing portion 1122 and reduce the risk of electrolyte leakage.

[0109] In another embodiment of the present application, as described in the Fig. 4 to 7, Fig. 13 and Fig. 14, the pressing portion 1122 of the battery cell 20 is provided to form a second through-hole 1101, and the electrode terminal 120 includes a flange portion 121 and a first connecting segment 122. The first connecting segment 122 passes through the second through-hole 1101, and the flange portion 121 is annularly provided around an outer peripheral wall of the first connecting segment 122. The flange portion 121 is located in the space enclosed by the flap 112. At least a part of the first insulating member 140 is located between the flange portion 121 and the pressing portion 1122, and at least a part of the sealing member 130 is located between the first connecting segment 122 and the base body 111.

[0110] The second through-hole 1101 denotes the through-hole formed by enclosing the pressing portion 1122. The second through-hole 1101 is capable of supplying power to the electrode terminal 120 to be exposed, so that the electrode terminal 120 can be connected to an external electrical terminal (e.g., a terminal block, etc.) to output or input electrical power from the battery cell 20. The second through-hole 1101 can also have a variety of shapes, such as a round hole, an oval hole, a polygonal hole, and the like.

[0111] The first connecting segment 122 denotes a segment of the electrode terminal 120 that extends in an axial direction (see the Fig. 7), and the first connecting segment 122 is passed through the second through-hole 1101 to facilitate the connection of the first connecting segment 122 to an external electrical terminal (e.g., a terminal block, etc.) for outputting or inputting electrical power from the battery cell 20. A flange portion 121 is connected to an outer peripheral wall of the first connecting segment 122. The flange portion 121 is provided annularly around the first connecting segment 122, and the flange portion 121 is disposed in the space enclosed by the flap 112, and at least a part of the first insulating member 140 is located between the pressing portion 1122 and the flange portion 121.At least a part of the sealing element 130 is located between the first connecting segment 122 and the base body 111, so that the pressing portion 1122 presses against the first insulating element 140, and the first insulating element 140 presses against the flange portion 121, so that the first connecting segment 122 compresses the sealing element 130, thereby achieving a pressure seal of the sealing element 130.

[0112] In the battery cell 20 of the embodiment of the present application, the pressing portion 1122 is capable of compressing the flange portion 121, so that the electrode terminal 120 can be compressed around its entire circumference. Thus, the pressing portion 1122 is capable of compressing the sealing member 130 more stably and reliably, and the risk of electrolyte leakage is reduced.

[0113] In another embodiment of the present application, as described in the Fig. 4 to 7, 13 and 14, the electrode terminal 120 of the battery cell 20 further comprises a second connecting segment 123, wherein one end of the second connecting segment 123 is connected to an end portion of the first connecting segment 122 facing away from the pressing portion 1122, wherein the sealing element 130 encloses a third through-hole 131 and the second connecting segment 123 is passed through the third through-hole 131.

[0114] The second connecting segment 123 is another segment of the electrode terminal 120 that extends axially (see the Fig. 7 shown X-direction), as in Fig. 7. The second connecting segment 123 is coaxially connected to the first connecting segment 122, and the second connecting segment 123 is connected to the end portion of the first connecting segment 122 facing away from the pressing portion 1122. The electrode terminal 120 has a stepped column shape. The sealing member 130 is provided annularly around the first through-hole 1111. The sealing member 130 has an annular structure. The through-hole formed by enclosing the central part of the sealing member 130 is a third through-hole 131, and the second connecting segment 123 is passed through the third through-hole 131, which can facilitate the electrode assembly 200 to be electrically connected to the second connecting segment 123 to realize the input and output of the electric power of the battery cell 20.

[0115] In another embodiment of the present application, as in Fig. 7, Fig. 11 and Fig. 14, the battery cell 20 is provided, wherein the hole diameter of the second through hole 1101 is D1 and the outer diameter of the flange portion 121 is d1, wherein (d1−D1)d1≥0.05.

[0116] The battery cell 20 of the embodiment of the present application can be achieved by setting (d1−D1)d1≥0.05 limit the ratio of the area of the overlapping portion of the projection of the pressing portion 1122 and the electrode terminal 120 along the thickness direction of the base body 111 to the projection area of the electrode terminal 120 along the thickness direction of the base body 111, so that the part of the pressing portion 1122 that directly presses against the electrode terminal 120 through the first insulating member 140 has a certain pressing area, and that the pressing portion 1122 is able to stably press against the electrode terminal 120, thereby reducing the risk of electrolyte leakage.

[0117] In some embodiments, the value of (d1−D1)d1 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45 or 0.5, but is not limited to this.

[0118] In another embodiment of the present application, as in Fig. 7, Fig. 11 and Fig. 14, the battery cell 20 is provided, wherein the hole diameter of the second through hole 1101 is D1 and the outer diameter of the flange portion 121 is d1, wherein (d1−D1)d1≤0.4.

[0119] In the battery cell 20 of the embodiment of the present application, (d1−D1)d1≤0.4 provided so that the hole diameter of the second through-hole 1101 and the cross-sectional area of the first connecting segment 122 are not too small, whereby the electrode terminal 120 has a good overcurrent capacity.

[0120] In some embodiments, the value of (d1−D1)d1 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35 or 0.4, but is not limited to this.

[0121] In another embodiment of the present application, as in Fig. 7, Fig. 11 and Fig. 14, the battery cell 20 is provided, wherein the hole diameter of the second through hole 1101 is D1 and the outer diameter of the flange portion 121 is d1, wherein 0.1≤(d1−D1)d1≤0.4.

[0122] In the battery cell 20 of the embodiment of the present application, 0.1≤(d1−D1)d1≤0.4 which ensures a low risk of leakage and the electrode terminal 120 has a good overcurrent capacity.

[0123] In some embodiments, the value of (d1−D1)d1 0.1, 0.15, 0.2, 0.25, 0.3, 0.35 or 0.4, but is not limited to this.

[0124] In the actual manufacturing process, as in the Fig. 5, Fig. 6 and Fig. As shown in Figure 7, the flap 112 is first machined on the base body 111, after which a tool is used to bend the end portion of the flap 112 facing away from the base body 111 toward the electrode terminal 120 to form the pressing portion 1122, and the pressing portion 1122 is pressed against the first insulating member 140 to realize the attachment of the electrode terminal 120 and the compression of the sealing member 130. Meanwhile, the flap 112 tends to fold outward in the direction away from the electrode terminal 120 under its own restoring force, the reverse resisting force of the first insulating member 140 on the pressing portion 1122, and other forces, causing a problem of dimensional instability of the manufactured flap 112.

[0125] In another embodiment of the present application, as in Fig. 7, Fig. 11 and Fig. 14, the battery cell 20 is provided, wherein the hole diameter of the second through hole 1101 is D1 and the outer diameter of the flange portion 121 is d1, where d1 - D1 ≥ 0.8mm.

[0126] In the battery cell 20 of the embodiment of the present application, d1 - D1 ≥ 0.8 mm, so that the extension length of the pressing portion 1122 toward the first connection segment 122 is large, this results in a low risk of the pressing portion 1122 folding outward in the direction away from the electrode terminal 120, whereby the thus-manufactured flap 112 has good dimensional stability and the pressing portion 1122 can stably press against the electrode terminal 120, thereby reducing the risk of electrolyte leakage from the electrode terminal 120.

[0127] In some embodiments, the value of d1-D1 may be, among others, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3 mm, 3.1 mm, 3.5 mm, or 4 mm.

[0128] In another embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. 14, the hole diameter of the second through hole 1101 of the battery cell 20 is D1 and the outer diameter of the flange portion 121 is d1, where d1 - D1 ≤ 3mm.

[0129] In the battery cell 20 of the embodiment of the present application, d1 - D1 ≤ 3 mm, so that the extension length of the pressing portion 1122 in the direction of the first connecting segment 122 is not too long. The manufacturing and bending of the flange portion 112 is relatively simple, and it is convenient to process and manufacture. Furthermore, it is also possible to ensure that the hole diameter of the second through-hole 1101 formed by enclosing the pressing portion 1122 is not too small, so that the electrode terminal 120 has good overcurrent capacity.

[0130] In some embodiments, the value of d1-D1 may be, among others, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, or 3 mm.

[0131] In another embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. 14, the hole diameter of the second through hole 1101 of the battery cell 20 is D1 and the outer diameter of the flange portion 121 is d1, where 0.8mm ≤ d1 - D1 ≤ 3mm.

[0132] In the battery cell 20 of the embodiment of the present application, 0.8 mm ≤ d1 - D1 ≤ 3 mm, so that the bending of the flange portion 112 is easy. The pressing portion 1122 is able to be stably pressed against the electrode terminal 120, thereby reducing the risk of electrolyte leakage, and the electrode terminal 120 has good overcurrent capability.

[0133] In some embodiments, the value of d1 - D1 may be, among others, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, or 3 mm.

[0134] In a further embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. 14, the outer diameter of the first connecting segment 122 of the battery cell 20 is d2, where D1 - d2 ≥ 0.5mm.

[0135] In the battery cell 20 of the embodiment of the present application, D1 - d2 ≥ 0.5 mm, so that there is a certain distance between the inner wall of the second through-hole 1101 and the outer peripheral wall of the first connecting segment 122, which is capable of accommodating a part of the first insulating member 140 (the second insulating portion 142) with a certain thickness to reduce the risk of current leakage of the first connecting segment 122.

[0136] In some embodiments, the value of D1 - d2 may be, among others, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm or 3 mm.

[0137] In a further embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. 14, the outer diameter of the first connecting segment 122 of the battery cell 20 is d2, where D1 - d2 ≤ 2.5mm.

[0138] In the battery cell 20 of the embodiment of the present application, D1 - d2 ≤ 2.5 mm, so that the outer diameter of the first connection segment 122 can be set sufficiently large, thereby providing the electrode terminal 120 with good overcurrent capability. However, if the value of D1 - d2 is set too large, the outer diameter of the first connection segment 122 may be too small, and the electrode terminal 120 may have poor overcurrent capability.

[0139] In some embodiments, the value of D1 - d2 may be, among others, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm or 2.5 mm.

[0140] In a further embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. 14, the outer diameter of the first connecting segment 122 of the battery cell 20 is d2, where 0.5mm ≤ D1 - d2 ≤ 2.5mm.

[0141] In the battery cell 20 of the embodiment of the present application, 0.5 mm ≤ D1 - d2 ≤ 2.5 mm, so that the risk of leakage current generation of the first connection segment 122 is low, and the outer diameter of the first connection segment 122 is appropriately set so that the electrode terminal 120 has a good overcurrent capability.

[0142] In some embodiments, the value of D1 - d2 may be, among others, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm or 2.5 mm.

[0143] In another embodiment of the present application, as described in the Fig. 7, Fig. 11, Fig. 13 and Fig. 14, the first connecting portion 1121 of the battery cell 20 is provided annularly around the first insulating member 140 and encloses a fourth through-hole 1102, and the hole diameter of the fourth through-hole 1102 is D2, and the outer diameter of the flange portion 121 is d1, where D2 - d1 ≥ 0.5 mm.

[0144] The first connecting portion 1121 is provided in a ring shape around the first insulating member 140. The first connecting portion 1121 has the shape of an annular hollow structure, and the through-hole formed by enclosing the first connecting portion 1121 is the fourth through-hole 1102. The first connecting portion 1121 may be provided perpendicular to the base body 111 or inclined to the base body 111, and the first connecting portion 1121 may be provided perpendicular to the pressing portion 1122 or at an obtuse or acute angle thereto. The cross section of the first connecting portion 1121 can have various shapes, and it can be, for example, circular, elliptical, polygonal, or other shapes. The fourth through-hole 1102 provides installation space for components such as the flange portion 121, the first insulating member 140, the sealing member 130, and the like.The shape of the fourth through-hole 1102 may be different, e.g., circular, polygonal, oval, and the like.

[0145] In the battery cell 20 of the embodiment of the present application, D2 - d1 ≥ 0.5 mm, so that a certain distance is provided between the inner wall of the fourth through-hole 1102 and the outer peripheral wall of the flange portion 121, and the part of the first insulating member 140 located within the distance has a certain thickness, which reduces the risk of a short circuit due to the intrusion of a foreign matter such as a metal burr into the part.

[0146] In some embodiments, the value of D2 - d1 may be, among others, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, or 3 mm.

[0147] In another embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. 14, the first connecting portion 1121 of the battery cell 20 is provided annularly around the first insulating member 140 and encloses a fourth through-hole 1102, wherein the hole diameter of the fourth through-hole 1102 is D2 and the outer diameter of the flange portion 121 is d1, where D2 - d1 ≤ 2.5mm.

[0148] In the battery cell 20 of the embodiment of the present application, D2 - d1 ≤ 2.5 mm, so that the distance between the inner wall of the fourth through-hole 1102 and the outer peripheral wall of the flange portion 121 is not too large, so that the reverse pressure force exerted by the first insulating member 140 on the pressing portion 1122 is not too far from the junction between the pressing portion 1122 and the first connecting portion 1121. The force arm of this reverse pressure force for folding over the junction between the pressing portion 1122 and the first connecting portion 1121 is not too large, so that there is little risk of the pressing portion 1122 folding out, which can reduce the risk of electrolyte leakage.

[0149] In some embodiments, the value of D2 - d1 may be, among others, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, or 2.5 mm.

[0150] In another embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. 14, the first connecting portion 1121 of the battery cell 20 is provided annularly around the first insulating member 140 and encloses a fourth through-hole 1102, wherein the hole diameter of the fourth through-hole 1102 is D2 and the outer diameter of the flange portion 121 is d1, where 0.5mm ≤ D2 - d1 ≤ 2.5mm.

[0151] In the battery cell 20 of the embodiment of the present application, 0.5mm ≤ D2 - d1 ≤ 2.5mm, so that the risk of short circuit and the risk of electrolyte leakage are reduced.

[0152] In some embodiments, the value of D2 - d1 may be, among others, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm or 2.5 mm.

[0153] In another embodiment of the present application, as described in the Fig. 5, Fig. 6 and Fig. As shown in Figure 7, the first insulating member 140 of the battery cell 20 includes a first insulating portion 141 and a second insulating portion 142 connected to each other, with the first insulating portion 141 wrapped around the flange portion 121. The second insulating portion 142 is located between an inner wall of the second through-hole 1101 and an outer peripheral wall of the first connecting segment 122, and the pressing portion 1122 is pressed against a surface of the first insulating portion 141 facing away from the base body 111.

[0154] The first insulating portion 141 is the part of the first insulating member 140 that is wrapped around the flange portion 121, and the first insulating portion 141 is wrapped outside the flange portion 121 so that the first insulating portion 141 insulates and separates the flange portion 121 from the flap 112. The first insulating portion 141 may have a U-shaped or L-shaped cross section to insulate and separate the flange portion 121 from the flap 112.The second insulating portion 142 is a part of the first insulating member 140 that passes through the second through-hole 1101, and the second insulating portion 142 is located between an inner wall of the second through-hole 1101 and an outer peripheral wall of the first connecting segment 122, so that the second insulating portion 142 can separate the first connecting segment 122 from the pressing portion 1122, and thus insulation of the flange portion 112 from the electrode terminal 120 is achieved.

[0155] The pressing portion 1122 presses against the surface of the first insulating portion 141 facing away from the base body 111. It is understood that the pressing portion 1122 presses the first insulating portion 141 against the base body 111 and the first insulating portion 141 presses the flange portion 121 against the base body 111, which in turn causes the first connecting segment 122 to compress the sealing element 130, thereby achieving a pressure seal of the sealing element 130.

[0156] In the battery cell 20 of the embodiment of the present application, the first insulating portion 141 can separate the flange portion 121 from the lid 112, and the second insulating portion 142 separates the first connecting segment 122 from the pressing portion 1122, so that the electrode terminal 120 and the lid 112 are completely insulated from each other by the insulating member, thereby reducing the risk of short circuit and improving the reliability of the battery cell 20 in use.

[0157] In another embodiment of the present application, as in Fig. 7, the second insulating portion 142 of the battery cell 20 is provided so that it protrudes from the surface of the pressing portion 1122 facing away from the base body 111.

[0158] In the battery cell 20 of the embodiment of the present application, the second insulating portion 142 protrudes from the surface of the pressing portion 1122 facing away from the main body 111, and the part of the second insulating portion 142 protruding from the pressing portion 1122 increases the creepage distance and reduces the risk of leakage current formation.

[0159] In another embodiment of the present application, the surface of the second insulating portion 142 of the battery cell 20 facing away from the main body 111 is provided so as to be flush with the surface of the pressing portion 1122 facing away from the main body 111, and no groove structure is formed between the pressing portion 1122 and the first connecting segment 122 in which dirt can easily accumulate, so that the risk of leakage current formation due to dirt is reduced.

[0160] In another embodiment of the present application, at least a part of the projection of the pressing portion 1122 of the battery cell 20 and the sealing member 130 overlaps in the thickness direction of the main body 111.

[0161] At least a part of the projection of the pressing portion 1122 and the sealing member 130 overlaps in the thickness direction (see the Fig. 7) of the base body 111. It is to be understood that a plane perpendicular to the direction shown by the arrow X is defined as the projection plane, as in Fig. 7, and the projection of the pressing portion 1122 and the sealing member 130 on the projection plane may also partially or completely overlap.

[0162] In the battery cell 20 of the embodiment of the present application, at least a part of the projection of the pressing portion 1122 and the sealing member 130 overlaps along the thickness direction of the main body 111 (see the Fig. 7), i.e., at least a portion of the sealing element 130 is located between the base body 111 and the pressing portion 1122. In this way, the pressing portion 1122 can be pressed directly against the portion of the sealing element 130 located between the base body 111 and the pressing portion 1122 by the first insulating member 140 and the electrode terminal 120, which improves the pressing effect of the sealing element 130 and reduces the risk of the pressing portion 1122 folding out due to an external tensile force on the electrode terminal 120. The sealing element 130 is also capable of stably and reliably sealing between the electrode terminal 120 and the base body 111, thereby reducing the risk of electrolyte inside the housing 100 leaking between the electrode terminal 120 and the base body 111.

[0163] In another embodiment of the present application, the pressing portion 1122 of the battery cell 20 is formed by bending a part of the flap 112 in the direction of the axis of the first through hole 1111.

[0164] For example, the axis of the flap 112 is a straight line CC, which Fig. 11 is shown.

[0165] In the battery cell 20 of the embodiment of the present application, a part of the flap 112 is bent to form the pressing portion 1122, and the pressing portion 1122 is easy to process and manufacture.

[0166] In another embodiment of the present application, the pressing portion 1122 of the battery cell 20 is provided with a Brinell hardness in the range of 10 HBW to 100 HBW.

[0167] The hardness of the 1122 contact section is the Brinell hardness in HBW. The measurement method for Brinell hardness can be found in GB / T23.1-2018 for the implementation of the measurement principle for determining Brinell hardness.

[0168] In the battery cell 20 of the embodiment of the present application, the Brinell hardness of the pressing portion 1122 is set in the range of 10 HBW to 100 HBW, and is set so that the pressing portion 1122 has a certain hardness, so that the pressing portion 1122 is able to stably press the electrode terminal 120, and does not cause the pressing portion 1122 to be easily deformed and unable to press the sealing member 130 because the Brinell hardness of the pressing portion 1122 is set too small. Also, the Brinell hardness of the pressing portion 1122 is not set too large, so that the pressing portion 1122 is difficult to deform by bending.

[0169] In one embodiment, the Brinell hardness of the pressing portion 1122 may be, but is not limited to, 10 HBW, 20 HBW, 30 HBW, 40 HBW, 50 HBW, 60 HBW, 70 HBW, 80 HBW, 90 HBW, or 100 HBW.

[0170] In another embodiment of the present application, the material for the pressing portion 1122 of the battery cell 20 is made of an aluminum alloy.

[0171] Aluminum alloys are alloys that contain aluminum and smaller amounts of other metals such as copper, magnesium, or manganese. For example, an aluminum alloy has the following mass percentage composition: aluminum ≥ 99.6%, copper ≤ 0.05%, iron ≤ 0.35%, magnesium ≤ 0.03%, manganese ≤ 0.03%, silicon ≤ 0.25%, titanium ≤ 0.03%, vanadium ≤ 0.05%, zinc ≤ 0.05%, and other individual elements ≤ 0.03%.

[0172] In the battery cell 20 of the present embodiment, the pressing portion 1122 is made of an aluminum alloy, which is readily available and inexpensive, contributing to reducing the manufacturing cost of the casing 100. On the other hand, the aluminum alloy also has a suitable hardness to meet the requirements for bending, forming, and compressing the pressing portion 1122.

[0173] In another embodiment of the present application, as described in the Fig. 9 to 12, a thickness h1 of the first connecting portion 1121 of the battery cell 20 is provided which is greater than or equal to 0.8 mm.

[0174] The battery cell 20 of the embodiment of the present application has a thickness h1 of the first connecting portion 1121 that is greater than or equal to 0.8 mm, and the first connecting portion 1121 has a certain thickness. The first connecting portion 1121 has good structural strength, which can stably support the pressing portion 1122, thereby reducing the risk of the pressing portion 1122 folding out, so that the pressing portion 1122 is pressed against the electrode terminal 120, thereby stably pressing the electrode terminal 120 and reducing the risk of electrolyte leakage.

[0175] In some embodiments, the thickness h1 of the first connecting portion 1121 may be, but is not limited to, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, or 1.7 mm.

[0176] In another embodiment of the present application, as described in the Fig. 9 to 12, the thickness h1 of the first connecting portion 1121 of the battery cell 20 is provided to be less than or equal to 1.5 mm, and the thickness h1 of the first connecting portion 1121 is not designed to be too large, which reduces the accumulation of materials, reduces the volume, and improves the volume utilization rate.

[0177] In some embodiments, the thickness h1 of the first connecting portion 1121 may be, but is not limited to, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, or 1.5 mm.

[0178] In another embodiment of the present application, as described in the Fig. As shown in Figures 9 to 12, the thickness h1 of the first connecting portion 1121 of the battery cell 20 is in the range of 0.8 mm to 1.5 mm. This allows the first connecting portion 1121 to play a good supporting role for the pressing portion 1122, allowing the pressing portion 1122 to stably press the electrode terminal 120, thereby reducing the risk of electrolyte leakage. It can also reduce the accumulation of materials, reduce the volume, and improve the volume utilization rate.

[0179] In some embodiments, the thickness h1 of the first connecting portion 1121 may be, but is not limited to, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, or 1.5 mm.

[0180] In another embodiment of the present application, as described in the Fig. 9 to 12, a thickness h2 of the pressing portion 1122 of the battery cell 20 is greater than or equal to 0.8 mm.

[0181] In the battery cell 20 of the embodiment of the present application, the thickness h2 of the pressing portion 1122 is greater than or equal to 0.8 mm, and the pressing portion 1122 has a certain thickness, and it is difficult for the pressing portion 1122 to deform, so that the pressing portion 1122 is pressed against the electrode terminal 120. The risk of the pressing portion 1122 being unfolded is low, and the ability of the pressing portion 1122 to resist unfolding is good, so that the pressing portion can be stably pressed against the electrode terminal 120, and the risk of electrolyte leakage is reduced.

[0182] In some embodiments, the thickness h2 of the pressing portion 1122 may be, but is not limited to, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, or 1.7 mm.

[0183] In another embodiment of the present application, as described in the Fig. 9 to 12, the thickness h2 of the pressing portion 1122 of the battery cell 20 is less than or equal to 1.5 mm.

[0184] In the battery cell 20 of the embodiment of the present application, the thickness h2 of the pressing portion 1122 is less than or equal to 1.5 mm, so that the thickness h2 of the pressing portion 1122 is not set too large and has less impact on the size of other components such as the electrode terminal 120, resulting in a reduction in the volume of the battery cell 20 and an improvement in the energy density of the battery 1100. As shown in Fig. 7, in the case where the first connection segment 122 is connected to the external electrical connection member after passing through the second through-hole 1101, if the thickness of the pressing portion 1122 is large, the height of the first connection segment 122 needs to be set larger in order to pass through the second through-hole 1101, which also increases the volume of the battery cell 20 and thus reduces the energy density of the battery 1100.

[0185] In some embodiments, the thickness h2 of the pressing portion 1122 may be, but is not limited to, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, or 1.5 mm.

[0186] In another embodiment of the present application, as described in the Fig. As shown in FIGS. 9 to 12, the thickness h2 of the pressing portion 1122 of the battery cell 20 is greater than or equal to 0.8 mm, and the thickness of the pressing portion 1122 is less than or equal to 1.5 mm. This setting allows the pressing portion 1122 to stably press against the electrode terminal 120 and reduce the risk of electrolyte leakage. It can also have less impact on the size of other components such as the electrode terminal 120, contributing to reducing the volume of the battery cell 20 and improving the energy density of the battery 1100.

[0187] In some embodiments, the thickness h2 of the pressing portion 1122 may be, but is not limited to, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, or 1.5 mm.

[0188] In another embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. 12, the flap 112 of the battery cell 20 further comprises a second connecting portion 1123, wherein the second connecting portion 1123 connects the first connecting portion 1121 to the pressing portion 1122, and wherein the second connecting portion 1123 is provided with an inverted beveled surface 11231 on the surface facing away from the electrode terminal 120.

[0189] The second connecting portion 1123 is a bent part of the flap 112 that connects the pressing portion 1122 to the first connecting portion 1121. As shown in Fig. As shown in Figure 12, the horizontal segment of the flap 112 is divided by a vertical dashed line, the part to the left of the vertical dashed line being the second connecting portion 1123, and the part to the right of the vertical dashed line being the pressing portion 1122. The first connecting portion 1121 and the second connecting portion 1123 are divided by a horizontal dashed line located at the top, the portion above the horizontal dashed line being the second connecting portion 1123, and the portion below the dashed line being the first connecting portion 1121.

[0190] The inverted tapered surface 11231 is an inclined surface formed on the surface of the second connecting portion 1123 facing away from the electrode terminal 120, as shown in Fig. 12, and the inverted beveled surface 11231 extends inclined upward in the direction of the axis of the flap 112 until it meets the upper surface of the second connecting portion 1123. When using a tool to compress and bend the flap 112 to obtain the pressing portion 1122, the tool is provided with an inclined surface adapted to the inverted beveled surface 11231, and the inverted beveled surface 11231 is obtained by compressing the flap 112 by the inclined surface. When the inclined surface presses the flap 112, the force exerted by the inclined surface on the flap 112 is perpendicular to the inverted beveled surface 11231 and directed toward the inner side of the flap 112.The force component along the Y direction has a positive effect on the bending process of the flap 112, and the tool is better controlled by the reverse force, making the bending process of the flap 112 easy and fast.

[0191] In a further embodiment of the present application, as described in the Fig. 7 and Fig. 11, in the battery 20 an angle α is provided between the inverted beveled surface 11231 and the axis of the flap 112, which is between 30° and 60°.

[0192] In the battery cell 20 of the embodiment of the present application, the angle α between the inverted tapered surface 11231 and the axis of the door 112 is set within the above range. The structural strength of the second connecting portion 1123 is good, and the pressing portion 1122 is not easily unscrewed. If the angle α between the inverted tapered surface 11231 and the axis of the door 112 is set too small and too large, the inverted tapered surface 11231 is excessively inclined, resulting in the second connecting portion 1123 being weak and the door 112 being prone to breakage from the second connecting portion 1123.

[0193] In one embodiment, the angle α between the inverted beveled surface 11231 and the axis of the flap 112 may be, but is not limited to, 30°, 35°, 40°, 45°, 50°, 55°, or 60°.

[0194] In one embodiment, the angle α between the inverted beveled surface 11231 and the axis of the flap 112 is 45° to make the structure of the inverted beveled surface 11231 regular, and the flap 112 is easy to process.

[0195] In a further embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. 12, in the battery cell 20, a ratio of a dimension L1 of the inverted tapered surface 11231 in the thickness direction of the first connecting portion 1121 (see the Fig. 12) to a thickness h1 of the first connecting portion 1121 greater than or equal to 0.3.

[0196] The dimension L1 of the inverted tapered surface 11231 in the thickness direction of the first connecting portion 1121 is a dimension occupied by the inverted tapered surface 11231 in the thickness direction of the first connecting portion 1121.

[0197] In the battery cell 20 of the embodiment of the present application, the ratio of the dimension L1 of the inverted chamfer 11231 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 is greater than or equal to 0.3. With this setting, the inverted chamfer 11231 has a large area, which facilitates the processing of the lid 112. If the ratio of the dimension L1 of the inverted chamfer 11231 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 is set too small, the area of the inverted chamfer 11231 is small, and it does not have a better effect in assisting the bending of the lid 112.

[0198] In one embodiment, the ratio of the dimension L1 of the inverted tapered surface 11231 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 may be 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, or 0.7, but is not limited thereto.

[0199] In another embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. 12, in the battery cell, a ratio of the dimension L1 of the inverted tapered surface 11231 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 is less than or equal to 0.6. By setting, the inverted tapered surface 11231 does not excessively slope toward the first connecting portion 1121, so that the second connecting portion 1123 has good structural strength and the door 112 has good structural strength, reducing the risk of electrolyte leakage.

[0200] In one embodiment, the ratio of the dimension L1 of the inverted tapered surface 11231 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 may be 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, or 0.6, but is not limited thereto.

[0201] In another embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. As shown in Figure 12, in the battery cell 20, a ratio of the dimension L1 of the inverted tapered surface 11231 in the thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 is set in the range of 0.3 to 0.6. With this setting, the second connecting portion 1123 has good structural strength, the door 112 has good structural strength, which reduces the risk of electrolyte leakage, and the inverted tapered surface 11231 can better support the door 112 during bending, and the door 112 is easy to process.

[0202] In one embodiment, the ratio of the dimension L1 of the inverted tapered surface 11231 in a thickness direction of the first connecting portion 1121 to the thickness h1 of the first connecting portion 1121 may be 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, or 0.6, but is not limited thereto.

[0203] In another embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. 12, in the battery cell 20, a ratio of the dimension L2 of the inverted chamfered surface 11231 in the thickness direction (see the Fig. 12) of the pressing portion 1122 to a thickness h2 of the pressing portion 1122 of a value greater than or equal to 0.3.

[0204] The dimension L2 of the inverted tapered surface 11231 in the thickness direction of the pressing portion 1122 is the dimension occupied by the inverted tapered surface 11231 in the thickness direction of the pressing portion 1122.

[0205] In the battery cell 20 of the embodiment of the present application, the ratio of the dimension L2 of the inverted tapered surface 11231 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 is greater than or equal to 0.3. With this setting, the area of the inverted tapered surface 11231 is large, which facilitates the processing of the lid 112. If the ratio of the dimension L2 of the inverted tapered surface 11231 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 is set too small, the area of the inverted tapered surface 11231 is small, and it does not have a better effect in supporting the lid 112 during bending.

[0206] In one embodiment, the ratio of the dimension L2 of the inverted tapered surface 11231 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 may be 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, or 0.7, but is not limited thereto.

[0207] In another embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. As shown in Figure 12, in the battery cell 20, a ratio of the dimension L2 of the inverted tapered surface 11231 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 is less than or equal to 0.6. Therefore, the inverted tapered surface 11231 does not excessively slope toward the pressing portion 1122, so that the second connecting portion 1123 and the lid 112 have good structural strength, reducing the risk of electrolyte leakage. The ratio of the dimension L2 of the inverted tapered surface 11231 in the thickness direction of the pressing portion 1122 to the thickness h2 of the pressing portion 1122 is set too large, and the inverted tapered surface 11231 is excessively inclined toward the pressing portion 1122, whereby the second connecting portion 1123 becomes thinner and thus easily broken.

[0208] In one embodiment, the ratio of a dimension L2 of the inverted tapered surface 11231 in the thickness direction of the pressing portion 1122 to a thickness h2 of the pressing portion 1122 may be 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, or 0.6, but is not limited thereto.

[0209] In a further embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. As shown in Figure 12, in the battery cell 20, the ratio of a dimension L2 of the inverted tapered surface 11231 in the thickness direction of the pressing portion 1122 to a thickness h2 of the pressing portion 1122 is set in a range of 0.3 to 0.6. As a result, the second connecting portion 1123 and the door 112 have good structural strength, thus reducing the risk of electrolyte leakage. The inverted tapered surface 11231 can better support the door 112 during bending, and the door 112 is easy to process.

[0210] In one embodiment, the ratio of a dimension L2 of the inverted tapered surface 11231 in the thickness direction of the pressing portion 1122 to a thickness h2 of the pressing portion 1122 may be 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, or 0.6, but is not limited thereto.

[0211] In another embodiment of the present application, as described in the Fig. 7, Fig. 11 and Fig. 12, the flap 112 in the battery cell 20 further includes a third connecting portion 1124, wherein the third connecting portion 1124 is connected between the main body 111 and the first connecting portion 1121. The third connecting portion 1124 is formed with an inverted rounded surface 11241 on the surface facing away from the electrode terminal 120.

[0212] The third connecting portion 1124 is a part of the flap 112 that is located between the first connecting portion 1121 and the base body 111. As shown in Fig. 12, the first connecting portion 1121 and the third connecting portion 1124 may be divided, for example, by a horizontal dashed line located in the center, wherein the part located above the horizontal dashed line is the first connecting portion 1121 and the part located below the horizontal dashed line is the third connecting portion 1124. The base body 111 and the third connecting portion 1124 may be divided by a horizontal dashed line located below, wherein the part located below the horizontal dashed line is the base body 111 and the part located above the horizontal dashed line is the third connecting portion 1124.Among other things, it should be noted that the vertical dashed lines and the horizontal dashed lines in the embodiments of the present application are merely auxiliary lines used to illustrate the relationship between the parts of the flap 112 and do not represent any structure in the actual product.

[0213] The inverted rounded surface 11241 is a curved surface formed on the surface of the third connecting portion 1124 facing away from the electrode terminal 120, the curved surface protruding toward the electrode terminal 120.

[0214] In the battery cell 20 of the embodiment of the present application, the arrangement of the inverted rounded surface 11241 reduces the stress concentration at the junction between the flap 112 and the base body 111 and reduces the risk of breakage of the flap 112 and the base body 111.

[0215] In another embodiment of the present application, as described in the Fig. 7 and Fig. 11, the radius R1 of the inverted rounded surface 11241 in the battery cell 20 is greater than or equal to 0.4 mm.

[0216] In the battery cell 20 of the embodiment of the present application, the radius R1 of the inverted rounded surface 11241 is greater than or equal to 0.4 mm, so that the third connecting portion 1124 can have a certain thickness and the risk of breakage is reduced.

[0217] In one embodiment, the radius R1 of the inverted rounded surface 11241 may be, but is not limited to, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, or 1.3 mm.

[0218] In a further embodiment of the present application, as in Fig. 11, in the battery cell 20, the base body 111 is provided with an auxiliary groove 1112 on the surface facing away from the flap 112, wherein the auxiliary groove 1112 is provided on the side facing away from the flap 112 and serves to assist the production of the flap 112.

[0219] The auxiliary groove 1112 is a groove provided opposite the flap 112 on a surface of the base body 111 facing away from the flap 112, wherein the auxiliary groove 1112 is provided opposite the flap 112. It can be seen that at least a portion of the projection of the auxiliary groove 1112 and the flap 112 overlaps along the thickness direction of the base body 111.

[0220] During the actual processing, the auxiliary groove 1112 on the surface of the base body 111 is pressed out with a tool before the flap 112 is processed. After this auxiliary groove 1112 is pressed out, a protruding structure is formed on the surface of the base body 111 facing away from the auxiliary groove 1112. Subsequently, the protruding structure is pressed again, so that the height of the protruding structure continuously increases, and finally the flap 112 is formed.

[0221] In the battery cell 20 of the embodiment of the present application, the protruding structure can be obtained by pressing out the auxiliary groove 1112 on the surface of the main body 111 facing away from the auxiliary groove 1112, and the process of pressing out the protruding structure to manufacture the lid 112 is simple.

[0222] In another embodiment of the present application, as described in the Fig. 11 and Fig. 12, in the battery cell 20, the groove depth of the auxiliary groove 1112 H1 and a height difference between the pressing section 1122 and the base body 111 H2, where H1H2≥0.1

[0223] In the battery cell 20 of the embodiment of the present application, the ratio of the groove depth of the auxiliary groove 1112 and the height difference between the pressing portion 1122 and the base body 111 is given by H1H2≥0.1 limited so that the auxiliary groove 1112 has a sufficient groove depth and the protruding structure protrudes from the base body 111 with a sufficiently large height so that the flap 112 can be easily pressed and processed. If the value of H1H2 is too small, the groove depth of the auxiliary groove 1112 is small. The height of the structure protruding from the base body 111 is small, and the flap 112 is not easy to process.

[0224] In one embodiment, the value of H1H2 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1 or 1.2, but is not limited to this.

[0225] In a further embodiment of the present application, as in Fig. 3, the housing 100 of the battery cell 20 comprises a housing body 180 and an end cover 110, wherein the end cover 110 covers an opening of the housing body 180 and forms a wall portion of the housing 100.

[0226] The end cover 110 forms a wall portion of the casing 100, and it is understood that components such as the electrode terminal 120, the first insulating member 140, and the sealing member 130 are installed on the end cover 110, which facilitates the installation of the components such as the electrode terminal 120, the first insulating member 140, and the sealing member 130, and the battery cell 20 is easy to assemble and operate.

[0227] In a further embodiment of the present application, as in Fig. As shown in Figure 3, in the battery cell 20, the housing 100 includes a housing body 180 and an end cover 110, wherein the end cover 110 covers an opening of the housing body 180. A wall portion of the housing body 180 forms a wall portion of the housing 100.

[0228] The wall portion of the case body 180 forms a wall portion of the case 100, and it goes without saying that components such as the electrode terminal 120, the first insulating member 140, the sealing member 130, and the like are installed on the wall portion of the case body 180, which may be a left wall, a right wall, a front wall, a rear wall, or a bottom wall of the case body 180.

[0229] In one embodiment, as in the Fig. As shown in Figures 3 to 14, the housing 100 comprises a battery cell 20 and a housing body 180, wherein the housing body 180 is provided with an opening, and the battery cell 20 comprises an end cover 110, a sealing member 130, an electrode terminal 120, a first insulating member 140, a second insulating member 150, and an electrical connecting member 160. The end cover 110 is provided with two flaps 112. The end cover 110 has the shape of an elongated strip. The two flaps 112 are provided at both ends of the end cover 110, and the two electrode terminals 120 within the two flaps 112 are each a positive electrode terminal and a negative electrode terminal.The positive electrode terminal and the negative electrode terminal can both adopt the same sealing method, or they can adopt different sealing methods, of which the specific ones can be selected according to actual needs.

[0230] The following is an example of one of the positive electrode terminals and the negative electrode terminal with the same sealing method:

[0231] As in the Fig. As shown in Figures 3 to 5, the base body 111 of the end cover 110 is provided at the opening. The base body 111 and the housing body 180 can be sealed and connected by welding, caulking, or the like. The second insulating member 150 and the electrical connecting member 160 are arranged in the housing body 180, and the flap 112 is provided on the side of the base body 111 facing away from the housing body 180.

[0232] As in the Fig. As shown in Figures 6 to 14, the end cover 110 includes a base body 111 and a flap 112. The base body 111 is provided with a first through-hole 1111. The first through-hole 1111 is a circular hole. The flap 112 protrudes from the surface of the base body 111 and is arranged around the first through-hole 1111, and the sealing member 130 is formed in a circular ring. The sealing member 130 has an inverted L-shaped cross section. A vertical segment of the sealing member 130 is inserted into the first through-hole 1111, and a horizontal segment of the sealing member 130 is arranged in a ring around the first through-hole 1111 and in the space formed by the flap 112.The electrode terminal 120 has the shape of a stepped cylinder, and the electrode terminal 120 is formed with a first connecting segment 122 and a second connecting segment 123 that are coaxially connected, and a flange portion 121 arranged annularly around the first connecting segment 122. The second connecting segment 123 passes through a third through-hole 131 formed by enclosing the sealing member 130 and then passes through the second insulating member 150 to be electrically connected to the electrical connecting member 160. The second insulating member 150 is arranged between the end cover 110 and the electrical connecting member 160 to reduce the risk of short circuits. The second insulating member 150 may have an elongated shape and be adapted to the shape of the end cover 110 and is provided in a stack with the end cover 110 to reduce the risk of short circuits.The electrical connecting element 160 is L-shaped.

[0233] A horizontal segment of the sealing element 130 is clamped between the base body 111 and the first connecting segment 122, and the first insulating element 140 has an annular shape and is provided annularly around the electrode terminal 120. The first insulating element 140 includes a first insulating portion 141 and a second insulating portion 142 that are connected to each other. The first insulating portion 141 has a U-shaped cross section, the first insulating portion 141 is wrapped around the outside of the flange portion 121, and the end portion of the flap 112 facing away from the base body 111 is bent toward the electrode terminal 120 to form the pressing portion 1122.The pressing portion 1122 presses against the surface of the first insulating portion 141 facing away from the base body 111, thereby pressing the pressing portion 1122 onto the horizontal segment of the sealing element 130 and sealing the horizontal segment of the sealing element 130, which impedes the flow of the electrolyte and reduces the risk of leakage. The pressing portion 1122 has the shape of a circular leaf. The pressing portion 1122 encloses a second through-hole 1101. The first connecting segment 122 is passed through the second through-hole 1101, and the second insulating portion 142 is also passed through the second through-hole 1101 and is located between the pressing portion 1122 and the first connecting segment 122. The first connecting segment 122 protrudes from the second through-hole 1101 to facilitate connection to an external electrical connector.The second insulating portion 142 also protrudes from the second through-hole 1101 to increase the creepage distance.

[0234] The flap 112 includes a third connecting portion 1124, a first connecting portion 1121, a second connecting portion 1123, and a pressing portion 1122. The third connecting portion 1124, the first connecting portion 1121, the second connecting portion 1123, and the pressing portion 1122 are provided annularly around the electrode terminal 120. The third connecting portion 1124, the first connecting portion 1121, and the second connecting portion 1123 are coaxially connected from top to bottom and form a hollow cylindrical structure. The third connecting portion 1124 is vertically connected to the base body 111, and the third connecting portion 1124, the first connecting portion 1121, the second connecting portion 1123, and the pressing portion 1122 are integral structures.The base body 111 is pressed to obtain the flap 112, and the end portion of the flap 112 facing away from the base body 111 is bent to form the pressing portion 1122. The pressing portion 1122 is vertically connected to the first connecting portion 1121', so that the flap 112 is structured in a regular manner and can be easily manufactured. An inverted beveled surface 11231 is formed on the surface of the second connecting portion 1123 facing away from the electrode terminal 120, and the angle between the inverted beveled surface 11231 and the axis of the flap 112 is 45°. An inverted chamfered surface 11241 is formed on the surface of the third connecting portion 1124 facing away from the electrode terminal 120, and the inverted chamfered surface 11241 is capable of reducing stress concentration and the risk of breakage.

[0235] The surface of the base body 111 facing away from the flap 112 is provided with an auxiliary groove 1112, and after the auxiliary groove 1112 is pushed out from the base body 111, a protruding structure is formed on the surface of the base body 111 facing away from the auxiliary groove 1112, and the protruding structure is continuously pushed and pulled upward to form the flap 112, and then the end portion of the flap 112 facing away from the base body 111 is bent toward the electrode terminal 120 and then forms the pressing portion 1122.

[0236] In a further embodiment of the present application, as in Fig. 2, a battery 1100 is provided which includes the above battery cell 20.

[0237] The battery 1100 of the embodiment of the present application uses the above battery cell 20, the battery cell 20 has a low risk of leakage, and the battery 1100 has good performance and reliability in use.

[0238] Since the battery 1100 of the embodiment of the present application adopts the technical solutions of one or more of the above embodiments, it also has all the advantageous effects brought about by the technical solutions of the above embodiments, which are not repeated here.

[0239] In another embodiment of the present application, as in Fig. 1, a power consuming device is provided which includes the above battery 1100.

[0240] The power consumption device of the embodiment of the present application, with the above battery 1100, has a low risk of leakage of the battery 1100, and the power consumption device has good performance and reliability in use.

[0241] Since the power consuming device of the embodiment of the present application uses the technical solutions of one or more of the above embodiments, it also has all the advantageous effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0242] The foregoing is only a preferred embodiment of the present application and is not intended to limit the present application, and all changes, equivalent substitutions and improvements made within the spirit and principles of the present application are within the scope of the present application. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 202310272167.2

[0001]

Claims

[1] Battery cell comprising: an electrode assembly; a housing for receiving the electrode assembly, a wall portion of the housing comprising a base body and a flap, the base body being provided with a first through-hole, the flap being provided annularly around the first through-hole, the base body and the flap forming a one-piece structure; a sealing member, at least a part of the sealing member being provided annularly around the first through-hole; an electrode terminal electrically connected to the electrode assembly, wherein at least a portion of the electrode terminal is located in a space enclosed by the flap, and wherein at least a portion of the sealing element is clamped between the electrode terminal and the base body; a first insulating member located between the flap and the electrode terminal to separate the flap and the electrode terminal; wherein the flap comprises a pressing portion and a first connecting portion, wherein the first connecting portion connects the base body to the pressing portion, wherein the pressing portion is pressed against the electrode terminal by the first insulating member to clamp the sealing member between the electrode terminal and the base body, wherein at least a part of the projection of the pressing portion and the electrode terminal overlaps along a thickness direction of the base body. [2] The battery cell according to claim 1, wherein the pressing portion extends along a circumferential direction of the flap and forms an annular structure. [3] The battery cell according to claim 2, wherein the pressing portion encloses a second through-hole, wherein the electrode terminal comprises a flange portion and a first connecting segment, wherein the first connecting segment is passed through the second through-hole, wherein the flange portion is provided annularly on an outer peripheral wall of the first connecting segment, and wherein the flange portion is located in a space enclosed by the flap, wherein at least a part of the first insulating member is located between the flange portion and the pressing portion, and wherein at least a part of the sealing member is located between the first connecting segment and the base body. [4] The battery cell according to claim 3, wherein the electrode terminal further comprises a second connecting segment, wherein one end of the second connecting segment is connected to an end portion of the first connecting segment facing away from the pressing portion; wherein the sealing element encloses a third through-hole, and wherein the second connecting segment is passed through the third through-hole. [5] The battery cell according to claim 3 or 4, wherein a hole diameter of the second through-hole is D1 and an outer diameter of the flange portion is d1, wherein (d1−D1)d1≥0.05 and / or (d1−D1)d1≤0.

4. [6] The battery cell according to any one of claims 3 to 5, wherein a hole diameter of the second through hole is D1 and an outer diameter of the flange portion is d1, wherein d1 - D1 ≥ 0.8mm and / or d1 - D1 ≤ 3mm. [7] Battery cell according to one of claims 3 to 6, wherein a hole diameter of the second through hole is D1 and an outer diameter of the first connecting segment is d2, wherein D1 - d2 ≥ 0.5mm and / or D1 - d2 ≤ 2.5mm. [8] Battery cell according to one of claims 3 to 7, wherein the first connecting portion is provided annularly around the first insulating member and encloses a fourth through-hole, wherein a hole diameter of the fourth through-hole is D2 and an outer diameter of the flange portion is d1, wherein D2 - d1 ≥ 0.5mm and / or D2 - d1 ≤ 2.5mm. [9] Battery cell according to one of claims 3 to 8, wherein the first insulating member comprises a first insulating portion and a second insulating portion which are connected to each other, wherein the first insulating portion is wrapped around the flange portion, wherein the second insulating portion is located between an inner wall of the second through-hole and an outer peripheral wall of the first connecting segment, wherein the pressing portion is pressed against a surface of the first insulating portion facing away from the main body. [10] Battery cell according to claim 9, wherein the second insulating portion protrudes from the surface of the pressing portion facing away from the base body; or wherein the surface of the second insulating portion facing away from the base body is flush with the surface of the pressing portion facing away from the base body. [11] The battery cell according to any one of claims 1 to 10, wherein at least a part of the projection of the pressing portion and the sealing member overlaps along a thickness direction of the main body. [12] The battery cell according to any one of claims 1 to 11, wherein the pressing portion is formed by bending a part of the flap in the direction of an axis of the first through-hole. [13] Battery cell according to one of claims 1 to 12, wherein the Brinell hardness of the pressing portion is in a range of 10HBW to 100HBW. [14] Battery cell according to one of claims 1 to 13, wherein the material of the pressing portion comprises an aluminum alloy. [15] Battery cell according to one of claims 1 to 14, wherein a thickness of the first connecting portion is greater than or equal to 0.8 mm and / or wherein a thickness of the first connecting portion is less than or equal to 1.5 mm. [16] Battery cell according to one of claims 1 to 15, wherein a thickness of the pressing portion is greater than or equal to 0.8 mm and / or wherein a thickness of the pressing portion is less than or equal to 1.5 mm. [17] The battery cell according to any one of claims 1 to 16, wherein the flap further comprises a second connecting portion, the second connecting portion connecting the first connecting portion to the pressing portion, the second connecting portion being formed with an inverted beveled surface on its surface facing away from the electrode terminal. [18] The battery cell of claim 17, wherein an angle between the inverted beveled surface and an axis of the flap is between 30° and 60°. [19] The battery cell according to claim 17 or 18, wherein the ratio of the dimension of the inverted tapered surface in a thickness direction of the first connecting portion and to the thickness of the first connecting portion is greater than or equal to 0.3, and / or wherein the ratio of the dimension of the inverted tapered surface in a thickness direction of the connecting portion to the thickness of the first connecting portion is less than or equal to 0.

6. [20] The battery cell according to any one of claims 17 to 19, wherein the ratio of the dimension of the inverted tapered surface in a thickness direction of the pressing portion to the thickness of the pressing portion is greater than or equal to 0.3, and / or wherein the ratio of the dimension of the inverted tapered surface in a thickness direction of the pressing portion to the thickness of the pressing portion is less than or equal to 0.

6. [21] The battery cell according to any one of claims 1 to 20, wherein the flap further comprises a third connecting portion, the third connecting portion being connected between the main body and the first connecting portion, the third connecting portion being formed with an inverted rounded surface on a surface of the third connecting portion facing away from the electrode terminal. [22] The battery cell according to claim 21, wherein a radius of the inverted rounded surface is greater than or equal to 0.4 mm. [23] Battery cell according to one of claims 1 to 22, wherein the base body is formed with an auxiliary groove on a surface facing away from the flap, wherein the auxiliary groove is provided opposite the flap and serves to assist in the manufacture of the flap. [24] Battery cell according to claim 23, wherein the auxiliary groove has a groove depth of H1, and wherein a height difference between the pressing portion and the base body is H2; wherein H1H2≥0.

1. [25] A battery cell according to any one of claims 1 to 24, wherein the housing comprises a housing body and an end cover, the end cover covering an opening of the housing body; wherein a wall portion of the end cover or the housing body forms a wall portion of the housing. [26] A battery, the battery comprising the battery cell according to any one of claims 1 to 25. [27] A power consuming device comprising the battery of claim 26.

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