Battery cell and battery pack

Abstract

A battery cell and a battery pack. The battery cell comprises: cores (100), connecting members (200), and conductive members (300). Each core (100) comprises a body (100a) and tabs (110) connected to the body (100a); mounting holes (210) are formed in each connecting member (200), and each tab (110) is at least partially accommodated in a corresponding mounting hole (210); and each conductive member (300) is arranged on the side of a corresponding tab (110) facing away from the body (100a), and the conductive member (300) is separately connected to the tab (110) and the connecting member (200). Each mounting hole (210) is formed in the connecting member (200), the tab (110) in the core (100) is configured to be at least partially located in the mounting hole (210), and the conductive member (300) is utilized to be connected to the tab (110) and the connecting member (200), so that the height space inside the battery cell occupied by each tab (110) can be reduced while achieving the electrical connection between the tab (110) and the connecting member (200), thereby facilitating improving the internal space utilization rate of the battery cell.

Description

Battery cells and battery packs

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on February 20, 2024, with application number 202420321959.4 and application name “Battery Cell and Battery Pack”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of battery technology, and specifically relates to a battery cell and a battery pack. Background Art

[0003] With the continuous development of the new energy industry, power batteries have been widely used in electric vehicles, electric motorcycles, household appliances and other means of transportation due to their advantages such as high energy, long cycle life and reliable performance. For electric vehicles, the safety of power batteries is an important factor related to their development.

[0004] In related technologies, a battery consists of a casing, a core, and a top cover. Tabs extend from the core and are connected to electrode terminals in the top cover via connecting tabs. During battery production, the connecting tabs are typically welded to the tabs and electrode terminals, respectively, before the connected core and top cover are assembled into the casing. However, during the welding and assembly process, the tabs bend multiple times, which takes up a significant amount of space and reduces the space utilization within the battery.

[0005] Summary of the Invention

[0006] The present application aims to provide a battery cell and a battery pack, which can solve the problem that the bent tabs in the battery of the related art occupy a large height space and reduce the space utilization rate inside the battery.

[0007] In order to solve the above technical problems, this application is implemented as follows:

[0008] In a first aspect, an embodiment of the present application provides a battery cell, comprising: a pole core, a connector, and a conductive member;

[0009] The pole core includes a body and a pole ear connected to the body, a mounting hole is provided in the connecting member, and the pole ear is at least partially accommodated in the mounting hole; the conductive member is provided on the side of the pole ear away from the body, and the conductive member is respectively connected to the pole ear and the connecting member.

[0010] Optionally, the conductive member is at least partially accommodated in the mounting hole and electrically connected to the tab; at least a portion of the circumferential edge of the conductive member is connected to the connecting member.

[0011] Optionally, the mounting hole has a side wall, and an end of the side wall facing the conductive member is provided with a step structure, and the conductive member is positioned on the step structure.

[0012] Optionally, a circumferential edge of the conductive member is connected to the step structure.

[0013] Optionally, the tab includes a first end and a second end that are oppositely disposed, the first end being connected to the body, the second end extending into the mounting hole in a direction away from the body, and the second end being connected to the conductive member.

[0014] Optionally, the tab includes a first end and a second end that are oppositely arranged, the first end is connected to the body, the second end extends into the mounting hole in a direction away from the body, and the second end is connected to the conductive member.

[0015] Optionally, one end of the tab away from the body is bent to form a bent portion, the bent portion is at least partially located in the mounting hole, and the bent portion is connected to the conductive member.

[0016] Optionally, the pole core has a height direction, and along the height direction of the pole core, the height of the portion of the pole tab located in the mounting hole is H1 mm, the height of the conductive member is H2 mm, and the height of the mounting hole is H3 mm, satisfying: H1+H2≤H3.

[0017] Optionally, the pole core has a height direction, and along the height direction of the pole core, the height of the conductive member is H2 mm, and the height of the mounting hole is H3 mm, satisfying: 0.3≤H2 / H3≤0.5.

[0018] Optionally, the height of the conductive member is H2 mm and satisfies: 0.1≤H2≤3.0.

[0019] Optionally, the height of the mounting hole is H3 mm and satisfies: 0.2≤H3≤5.0.

[0020] Optionally, the battery cell includes a plurality of the pole cores, each of which has a thickness direction, and the plurality of pole cores are stacked along the thickness direction of the pole core. Each of the pole cores is provided with a pole ear, and the connecting member is provided with the mounting hole at a position corresponding to the pole ear of each pole core.

[0021] Optionally, the plurality of pole cores are respectively provided with positive tabs and negative tabs, and the positive tabs of the plurality of pole cores can be connected in series through one connector, and the negative tabs of the plurality of pole cores can be connected in series through another connector.

[0022] Optionally, the minimum distance between two adjacent mounting holes is D mm, satisfying: 1≤D≤100.

[0023] Optionally, the conductive member is a conductive metal material member.

[0024] Optionally, the conductive member is made of a non-metallic conductive material.

[0025] Optionally, a surface of the conductive member facing away from the pole lug is flush with a surface of the connecting member facing away from the pole core.

[0026] Optionally, a surface of the conductive member facing away from the pole lug is higher than a surface of the connecting member facing away from the pole core.

[0027] Optionally, the battery cell further includes: a top cover and an electrode terminal, the top cover is provided on a side of the connector facing away from the body, a through hole is provided in the top cover, the electrode terminal is passed through the through hole, and the electrode terminal is connected to the connector.

[0028] Optionally, the battery cell may further include a shell, wherein a receiving cavity is provided in the shell, one end of the receiving cavity has an opening, the pole core is placed in the receiving cavity, and the top cover is sealed at the opening of the receiving cavity.

[0029] In a second aspect, an embodiment of the present application provides a battery pack comprising any of the battery cells described above.

[0030] In an embodiment of the present application, a mounting hole is provided in the connector, the pole ear in the pole core is provided so that at least part of it is located in the mounting hole, and a conductive member is used to connect the pole ear and the connector. Thus, while achieving electrical connection between the pole ear and the connector, the height space inside the battery cell occupied by the pole ear can be reduced, which helps to improve the internal space utilization of the battery cell.

[0031] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application.

[0032] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0034] FIG1 is a schematic diagram of a battery cell according to an embodiment of the present application;

[0035] FIG2 is an exploded view of a battery cell according to an embodiment of the present application;

[0036] FIG3 is a top view of a battery cell according to an embodiment of the present application;

[0037] FIG4 is a schematic diagram of a connector according to an embodiment of the present application;

[0038] FIG5 is an enlarged view of the circled portion A in FIG4 according to an embodiment of the present application;

[0039] FIG6 is a schematic diagram of the matching structure of the connector and the conductive member according to an embodiment of the present application;

[0040] FIG7 is a schematic diagram of another battery cell according to an embodiment of the present application;

[0041] FIG8 is an exploded view of another battery cell according to an embodiment of the present application;

[0042] FIG9 is a cross-sectional view of a battery cell along a height direction according to an embodiment of the present application;

[0043] FIG10 is a partial cross-sectional view of a battery cell along a height direction according to an embodiment of the present application;

[0044] FIG11 is an enlarged view of a battery cell according to an embodiment of the present application, corresponding to the circled portion B in FIG10 ;

[0045] FIG. 12 is an enlarged view of another battery cell according to an embodiment of the present application, corresponding to the circled portion B in FIG. 10 .

[0046] Reference numerals:

[0047] 100: pole core; 100a: body; 110: pole ear; 110a: first end; 110b: second end; 111: bending portion; 200: connecting piece; 210: mounting hole; 211: side wall; 212: step structure; 300: conductive piece; 400: top cover; 401: through hole; 410: electrode terminal; 500: shell; X: height direction of pole core; Y: thickness direction of pole core. Specific embodiments

[0048] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. Throughout the description of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected entities, and the character " / " generally indicates an "or" relationship between the connected entities.

[0050] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0052] The battery cells and battery packs provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0053] As shown in Figures 1 and 2, the battery cell according to some embodiments of the present application includes a pole core 100, a connector 200 and a conductive member 300; the pole core 100 includes a main body 100a and a pole tab 110 connected to the main body 100a, and the connector 200 is provided with a mounting hole 210, and the pole tab 110 is at least partially accommodated in the mounting hole 210; the conductive member 300 is provided on the side of the pole tab 110 away from the main body 100a, and the conductive member 300 is respectively connected to the pole tab 110 and the connector 200.

[0054] In an embodiment of the present application, a mounting hole 210 is provided in the connector 200, the tab 110 in the pole core 100 is provided so that at least a portion of the tab 110 is located within the mounting hole 210, and the conductive member 300 is used to connect the tab 110 and the connector 200. This allows for electrical connection between the tab 110 and the connector 200 while reducing the internal space occupied by the tab 110 in the battery cell, thereby helping to improve the internal space utilization of the battery cell.

[0055] It is understandable that in a conventional battery cell, one side of the connector 200 is connected to the electrode terminal 410 in the top cover 400, and the other side of the connector 200 is connected to the tab 110 in the core 100. The portion where the connector 200 connects to the tab 110 requires space within the battery cell. Furthermore, during the cell assembly process, the connector 200 can compress the tab 110, causing it to significantly bend and potentially insert into the core 100, posing a safety hazard to the battery cell.

[0056] In the battery cell of the embodiment of the present application, by providing a mounting hole 210 in the connector 200, the tab 110 is at least partially placed within the mounting hole 210, and the conductive member 300 is connected to the tab 110 within the mounting hole 210, and the conductive member 300 is connected to the connector 200. This ensures that the connector 200 is electrically connected to the tab 110 while saving the height space within the battery cell occupied by the mating portion of the connector 200 and the tab 110. This also reduces the pressure exerted by the connector 200 on the tab 110, lowering the risk of the tab 110 being invertedly inserted into the core 100, thereby improving the safety performance of the battery cell.

[0057] Specifically, the pole core 100 includes a body 100a and a tab 110 , the tab 110 is connected to the body 100a , a connector 200 is provided at one end of the body 100a with the tab 110 , a mounting hole 210 is provided in the connector 200 , and the tab 110 is at least partially disposed in the mounting hole 210 .

[0058] At the same time, a conductive member 300 is provided on the side of the mounting hole 210 away from the body 100a, and the conductive member 300 is connected to the end of the tab 110 away from the body 100a, and the conductive member 300 is connected to the connector 200. In this way, the conductive member 300 can achieve both the connection and fixation between the tab 110 and the connector 200 and the electrical conduction function.

[0059] The size of the mounting hole 210 in the connector 200 can be set according to the size of the tab 110 in the pole core 100 , so that the tab 110 can at least partially penetrate into the mounting hole 210 .

[0060] It should be noted that, usually, a positive electrode ear 110 and a negative electrode ear 110 are provided in the electrode core 100, and a connector 200 and a conductive member 300 are provided at the corresponding positions of the positive electrode ear 110 and the negative electrode ear 110. The connection structures of the positive electrode ear 110 and the negative electrode ear 110 with the connector 200 and the conductive member 300 are the same and similar, and can be referred to the above content. The embodiments of the present application do not limit this.

[0061] In some embodiments, the conductive member 300 can be made of a conductive metal material. For example, the conductive member 300 can be made of a conductive metal such as copper or aluminum. Furthermore, ultrasonic welding or laser welding can be used to weld the conductive member 300 to the tab 110 and the connector 200 respectively, so that the conductive member 300 can be used to connect and fix the tab 110 and the connector 200 and to conduct electricity.

[0062] In other embodiments, the conductive member 300 may also be made of a non-metallic conductive material. For example, the conductive member 300 may be made of a conductive adhesive. After the tab 110 is at least partially placed in the mounting hole 210, a conductive adhesive is injected or applied into the mounting hole 210 to form a conductive adhesive layer in the mounting hole 210. The conductive adhesive layer serves as the conductive member 300 to achieve adhesive fixation and electrical connection between the tab 110 and the connector 200.

[0063] Optionally, as shown in FIG. 1 and FIG. 6 , the conductive member 300 is at least partially accommodated in the mounting hole 210 and electrically connected to the tab 110 ; at least a portion of the circumferential edge of the conductive member 300 is connected to the connector 200 .

[0064] In the embodiment of the present application, the conductive member 300 is at least partially accommodated in the mounting hole 210, the portion of the conductive member 300 located in the mounting hole 210 is connected to the tab 110, and part or all of the circumferential edge of the conductive member 300 is connected to the connector 200. In this way, while satisfying the functions of the conductive member 300 in connecting and fixing the connector 200 and the tab 110 and conducting electricity, the thickness of the conductive member 300 can be reduced, thereby further reducing the height space occupied by the mating portion of the connector 200 and the tab 110.

[0065] In some embodiments, the surface of the conductive member 300 facing away from the tab 110 can be set flush with the surface of the connector 200 facing away from the pole core 100; or the surface of the conductive member 300 facing away from the tab 110 can be set higher than the surface of the connector 200 facing away from the pole core 100.

[0066] Optionally, as shown in Figures 4 to 6, the mounting hole 210 has a side wall 211, and a step structure 212 is provided at one end of the side wall 211 facing the conductive member 300. The conductive member 300 is positioned on the step structure 212, and the circumferential edge of the conductive member 300 is connected to the step structure 212.

[0067] In an embodiment of the present application, a step structure 212 is provided on one end of the side wall 211 of the mounting hole 210 facing the conductive part 300. When the conductive part 300 is at least partially embedded in the mounting hole 210, the circumferential edge of the conductive part 300 can cooperate with the step structure 212 to limit the conductive part 300 using the step structure 212, thereby improving the installation accuracy of the conductive part 300.

[0068] In addition, when welding is used to fix the conductive part 300 and the connecting part 200, the area corresponding to the step structure 212 can also be used as a welding area to weld the circumferential edge of the conductive part 300 and the connecting part 200, so that the welding slag generated during the welding process can be limited to the step structure 212 to prevent the welding slag from falling into the pole core 100 and causing a short circuit in the pole core 100.

[0069] In some embodiments, the circumferential edge of the conductive member 300 may be provided with a matching structure that is compatible with the step structure 212 . The matching structure and the step structure 212 can improve the matching accuracy between the conductive member 300 and the connector 200 .

[0070] Optionally, as shown in Figure 11, the tab 110 includes a first end 110a and a second end 110b arranged opposite to each other, the first end 110a is connected to the body 100a, the second end 110b extends into the mounting hole 210 in a direction away from the body 100a, and the second end 110b is connected to the conductive member 300.

[0071] In the embodiment of the present application, the first end 110a of the tab 110 is connected to the body 100a, and the second end 110b of the tab 110 extends into the mounting hole 210 in a direction away from the body 100a. In this way, the tab 110 can be connected to the connector 200 without bending the tab 110 or with a small bending. This not only reduces the length of the tab 110 and saves processing materials for the tab 110, but also avoids the risk of the tab 110 being inserted upside down into the core 100 due to a large bending of the tab 110 during assembly.

[0072] In specific applications, the length of the pole lug 110 in the pole core 100 can be reasonably set according to the height of the mounting hole 210 set in the connecting member 200, so that the pole lug 110 led out from the pole core 100 is just placed in the mounting hole 210, and then connected to the pole lug 110 in the mounting hole 210 through the conductive member 300, which can not only meet the connection requirements of the pole lug 110, but also effectively shorten the design length of the pole lug 110.

[0073] Optionally, as shown in FIG. 12 , one end of the tab 110 away from the body 100 a is bent to form a bent portion 111 . The bent portion 111 is at least partially located in the mounting hole 210 , and is connected to the conductive member 300 .

[0074] In an embodiment of the present application, a bent portion 111 is formed by bending one end of the tab 110 away from the main body 100a so that the bent portion 111 is at least partially located within the mounting hole 210, so that the conductive member 300 can be connected to the bent portion 111 of the tab 110 within the mounting hole 210. This not only facilitates the connection and fixation of the conductive member 300 and the tab 110, but also reduces the height space inside the battery cell occupied by the tab 110.

[0075] It can be understood that by setting the end of the pole tab 110 away from the main body 100a to bend to form a bending portion 111, and utilizing the bending portion 111 to cooperate with the conductive component 300, the matching area between the pole tab 110 and the conductive component 300 can be increased, which facilitates the welding or bonding fixation of the conductive component 300 and the pole tab 110, and improves the connection strength between the conductive component 300 and the pole tab 110.

[0076] In a specific application, the tab 110 extending from the body 100a can be bent and flattened first, and then the connector 200 can be placed on the body 100a, with the bent portion 111 of the tab 110 positioned within the mounting hole 210. This not only saves the length of the tab 110, but also facilitates the connection between the tab 110 and the conductive member 300.

[0077] Optionally, as shown in Figures 6 and 11, the pole core 100 has a height direction. Along the height direction X of the pole core 100, the height of the portion of the pole ear 110 located in the mounting hole 210 is H1 mm, the height of the conductive member 300 is H2 mm, and the height of the mounting hole 210 is H3 mm, satisfying: H1+H2≤H3.

[0078] In the embodiment of the present application, the sum of the height H1 of the portion of the tab 110 located within the mounting hole 210 and the height H2 of the conductive member 300 is set to be less than or equal to the height H3 of the mounting hole 210. In other words, the conductive member 300 is entirely located within the mounting hole 210, thereby further reducing the height space occupied by the mating portion of the connector 200 and the tab 110.

[0079] In some embodiments, the height H1 of the portion of the tab 110 located within the mounting hole 210, the height H2 of the conductive member 300, and the height H3 of the mounting hole 210 can all be measured using a vernier caliper. During actual measurement, at least three measurement values ​​can be obtained, and the average of the at least three measurement values ​​is taken as the final measurement value. Of course, other measurement tools and measurement methods can also be used for measurement, and the embodiments of the present application are not limited thereto.

[0080] Optionally, as shown in FIG6 , the pole core 100 has a height direction. Along the height direction X of the pole core 100 , the height of the conductive member 300 is H2 mm, and the height of the mounting hole 210 is H3 mm, satisfying: 0.3≤H2 / H3≤0.5.

[0081] In an embodiment of the present application, by setting a reasonable value range of the ratio H2 / H3 of the height H2 of the conductive member 300 to the height H3 of the mounting hole 210, the connection strength between the conductive member 300 and the tab 110 can be ensured, and the space of the mounting hole 210 occupied by the conductive member 300 can be reduced, so that a sufficient portion of the tab 110 is located in the mounting hole 210.

[0082] It is understood that if the ratio H2 / H3 is too small, the thickness of the portion of the conductive member 300 located within the mounting hole 210 will be too thin, and the connection strength between the conductive member 300 and the tab 110 cannot be guaranteed. If the ratio H2 / H3 is too large, the conductive member 300 will occupy the space within the mounting hole 210, and it will not be possible to ensure that a sufficient portion of the tab 110 is placed within the mounting hole 210, thereby failing to reduce the height space occupied by the connection portion of the tab 110 within the battery cell.

[0083] Specifically, the ratio H2 / H3 of the height H2 of the conductive member 300 to the height H3 of the mounting hole 210 can be set to any number such as 0.3, 0.35, 0.4, 0.45, 0.5, or a range between any two values. Of course, the specific value of the ratio H2 / H3 can be flexibly set according to actual needs and is not limited in this embodiment of the present application.

[0084] Optionally, as shown in FIG6 , the height of the conductive member 300 is H2 mm and satisfies: 0.1≤H2≤3.0.

[0085] In the embodiment of the present application, by setting a reasonable value range of the height H2 of the conductive member 300, it is ensured that the conductive member 300 has a certain mechanical strength, so that the conductive member 300 can play a role in stabilizing the connection between the connector 200 and the tab 110; at the same time, it is avoided that the thickness of the conductive member 300 is too thick and occupies more internal space of the battery cell.

[0086] Specifically, the height H2 of the conductive member 300 can be set to any number such as 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, or a range between any two values.

[0087] Optionally, as shown in FIG6 , the height of the mounting hole 210 is H3 mm and satisfies: 0.2≤H3≤5.0.

[0088] It is understood that the connector 200 is typically made of sheet material, the mounting hole 210 is provided through the connector 200, and the height H3 of the mounting hole 210 is positively correlated with the thickness of the connector 200. Therefore, by setting a range of values ​​for the height H3 of the mounting hole 210, the connector 200 is ensured to have a certain mechanical strength while also preventing the connector 200 from being too thick and occupying the internal height space of the battery cell.

[0089] Specifically, the height H3 of the mounting hole 210 can be set to any number such as 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, or a range between any two values.

[0090] Optionally, as shown in Figure 3, the battery cell includes multiple pole cores 100, the pole core 100 has a thickness direction Y, and the multiple pole cores 100 are stacked along the thickness direction Y of the pole core 100. Each pole core 100 is provided with a pole ear 110, and the connecting piece 200 is provided with an installation hole 210 at a position corresponding to the pole ear 110 of each pole core 100.

[0091] In an embodiment of the present application, a plurality of pole cores 100 are provided in a battery cell, each pole core 100 is provided with a pole ear 110, and the connector 200 is provided with a mounting hole 210 at a position corresponding to the pole ear 110 of each pole core 100, and each mounting hole 210 is provided with a corresponding conductive member 300, so that the pole ear 110 on each pole core 100 can be placed in the corresponding mounting hole 210, and the connection and fixation of the pole ear 110 and the connector 200 can be achieved through the corresponding conductive member 300.

[0092] It can be understood that the battery cell includes multiple pole cores 100, and the multiple pole cores 100 are respectively provided with positive pole ears 110 and negative pole ears 110. The positive pole ears 110 of the multiple pole cores 100 can be connected in series through a connector 200, and the negative pole ears 110 of the multiple pole cores 100 can be connected in series through another connector 200.

[0093] Among them, the size of the connector 200 and the number and position of the mounting holes 210 provided in the connector 200 can be determined according to the number of pole cores 100 in the battery cell and the position of the pole tabs 110 in the pole cores 100, which is not limited in the embodiment of the present application.

[0094] Optionally, as shown in FIG3 , the minimum distance between two adjacent mounting holes 210 is D mm, satisfying: 1≤D≤100.

[0095] In the embodiment of the present application, a reasonable value range of the minimum distance D between two adjacent mounting holes 210 is set to avoid the spacing being too small to affect the connection operation between the conductive member 300 and the tab 110 and the connector 200, and at the same time, to avoid the spacing being too large to cause waste of materials and space.

[0096] Specifically, the minimum distance D between two adjacent mounting holes 210 can be set to any number such as 1 mm, 5 mm, 10 mm, 20 mm, 30 mm, 50 mm, 80 mm, 90 mm, 100 mm, or a range between any two values.

[0097] In some embodiments, the minimum distance D between two adjacent mounting holes 210 can be measured using a vernier caliper, and at least three measurement values ​​are obtained through measurement, and the minimum value of the at least three measurement values ​​is taken as the final measurement value.

[0098] Optionally, the battery cell further includes a top cover 400 and an electrode terminal 410 . The top cover 400 is disposed on a side of the connector 200 facing away from the body 100 a . A through hole 401 is provided in the top cover 400 . The electrode terminal 410 is passed through the through hole 401 and is connected to the connector 200 .

[0099] In an embodiment of the present application, by arranging the top cover 400 on the side of the connector 200 away from the main body 100a, and passing the electrode terminal 410 through the top cover 400, the electrode terminal 410 is connected to the connector 200, so that the electrical connection between the electrode terminal 410 and the tab 110 can be achieved through the connector 200.

[0100] In some embodiments, the battery cell may further include a shell 500 , wherein a receiving cavity is provided in the shell 500 , and one end of the receiving cavity has an opening, and the pole core 100 may be placed in the receiving cavity, and the top cover 400 is sealed at the opening of the receiving cavity.

[0101] In other embodiments, the assembly process of the battery cell in the embodiments of the present application may include: first placing the pole tab 110 of the pole core 100 at least partially in the mounting hole 210 of the connector 200, and using the conductive member 300 to connect to the pole tab 110 and the connector 200 respectively, and then connecting the electrode terminal 410 to the connector 200.

[0102] Then, the pole core 100 with the connector 200 installed is installed into the accommodating cavity of the housing 500 , and the top cover 400 is covered, so that the electrode terminal 410 passes through the through hole 401 in the top cover 400 .

[0103] It can be understood that the use of the battery cell in the embodiment of the present application can not only reduce the internal height space of the battery cell occupied by the matching part of the pole tab 110 and the connector 200, but also avoid the risk of the pole tab 110 being squeezed by the connector 200 during assembly, causing the pole tab 110 to be inserted upside down into the pole core 100, thereby not only improving the space utilization of the battery cell, but also improving the safety performance of the battery cell.

[0104] Optionally, the present application also provides a battery pack, comprising the battery cells in the above embodiment.

[0105] In an embodiment of the present application, a mounting hole 210 is provided in the connector 200, the tab 110 in the pole core 100 is provided so that at least a portion of the tab 110 is located within the mounting hole 210, and the conductive member 300 is used to connect the tab 110 and the connector 200. This allows for electrical connection between the tab 110 and the connector 200 while reducing the internal space occupied by the tab 110 in the battery cell, thereby helping to improve the internal space utilization of the battery cell.

[0106] It should be noted that the battery pack in the embodiment of the present application may include the battery cell in any of the above embodiments. The specific structure of the battery cell can be found in the above content, and the embodiment of the present application will not be repeated here.

[0107] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0108] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0109] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0110] In the claims, any reference signs placed between brackets shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present application may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0111] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and purpose of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery cell, wherein: include: A pole core (100), a connecting member (200) and a conductive member (300); The pole core (100) comprises a body (100a) and a pole tab (110) connected to the body (100a); a mounting hole (210) is provided in the connecting member (200); the pole tab (110) is at least partially accommodated in the mounting hole (210); and the conductive member (300) is provided on a side of the pole tab (110) facing away from the body (100a); the conductive member (300) is respectively connected to the pole tab (110) and the connecting member (200).

2. The battery cell according to claim 1, wherein: The conductive member (300) is at least partially accommodated in the mounting hole (210) and electrically connected to the tab (110); at least a portion of the circumferential edge of the conductive member (300) is connected to the connecting member (200).

3. The battery cell according to claim 2, wherein: The mounting hole (210) has a side wall (211), and a step structure (212) is provided at one end of the side wall (211) facing the conductive member (300), and the conductive member (300) is positioned on the step structure (212).

4. The battery cell according to claim 3, wherein: The circumferential edge of the conductive member (300) is connected to the step structure (212).

5. The battery cell according to claim 1, wherein The tab (110) includes a first end (110a) and a second end (110b) that are arranged opposite to each other, wherein the first end (110a) is connected to the body (100a), and the second end (110b) extends into the mounting hole (210) in a direction away from the body (100a), and the second end (110b) is connected to the conductive member (300). The battery cell according to claim 1 , wherein: One end of the tab (110) away from the body (100a) is bent to form a bent portion (111), the bent portion (111) is at least partially located in the mounting hole (210), and the bent portion (111) is connected to the conductive member (300).

7. The battery cell according to any one of claims 1 to 6, wherein: The pole core (100) has a height direction. Along the height direction (X) of the pole core, the height of the portion of the pole tab (110) located in the mounting hole (210) is H1 mm, the height of the conductive member (300) is H2 mm, and the height of the mounting hole (210) is H3 mm, satisfying: H1+H2≤H3.

8. The battery cell according to any one of claims 1 to 6, wherein: The pole core (100) has a height direction. Along the height direction (X) of the pole core, the height of the conductive member (300) is H2 mm, and the height of the mounting hole (210) is H3 mm, satisfying the following: 0.3≤H2 / H3≤0.

5.

9. The battery cell according to claim 8, wherein: The height of the conductive member (300) is H2 mm and satisfies the following conditions: 0.1≤H2≤3.

0.

10. The battery cell according to claim 8, wherein The height of the mounting hole (210) is H3 mm and satisfies the following conditions: 0.2≤H3≤5.

0.

11. The battery cell according to claim 1, wherein The battery cell comprises a plurality of pole cores (100), the pole cores (100) having a thickness direction, the plurality of pole cores (100) being stacked along the thickness direction (Y) of the pole cores, each pole core (100) being provided with a pole lug (110), and the connector (200) being provided with a mounting hole (210) at a position corresponding to the pole lug (110) of each pole core (100).

12. The battery cell according to claim 11, wherein: The plurality of pole cores (100) are respectively provided with a positive electrode tab (110) and a negative electrode tab (110); the positive electrode tabs (110) of the plurality of pole cores (100) can be connected in series through one connecting member (200), and the negative electrode tabs (110) of the plurality of pole cores (100) can be connected in series through another connecting member (200).

13. The battery cell according to claim 11, wherein: The minimum spacing between two adjacent mounting holes (210) is D mm, satisfying: 1≤D≤100.

14. The battery cell according to claim 1, wherein The conductive member (300) is made of a conductive metal material.

15. The battery cell according to claim 1, wherein The conductive member (300) is made of a non-metallic conductive material.

16. The battery cell according to claim 1, wherein A surface of the conductive member (300) facing away from the pole tab (110) is flush with a surface of the connecting member (200) facing away from the pole core (100).

17. The battery cell according to claim 1, wherein The surface of the conductive member (300) facing away from the pole lug (110) is higher than the surface of the connecting member (200) facing away from the pole core (100).

18. The battery cell according to claim 1, wherein The battery cell further comprises a top cover (400) and an electrode terminal (410). The top cover (400) is arranged on a side of the connector (200) away from the body (100a). A through hole (401) is provided in the top cover (400). The electrode terminal (410) is passed through the through hole (401). The electrode terminal (410) is connected to the connector (200).

19. The battery cell according to claim 18, wherein: The battery cell may further include a shell (500), wherein a receiving cavity is provided in the shell (500), one end of the receiving cavity has an opening, the pole core (100) is placed in the receiving cavity, and the top cover (400) is sealed at the opening of the receiving cavity.

20. A battery pack, wherein: The battery cell comprises the battery cell according to any one of claims 1 to 19.

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