An electric cell and a battery module

Abstract

The application relates to an electric core and a battery module, and relates to the field of batteries. The electric core comprises an electric core shell and at least one electric connecting piece. The electric connecting piece is installed on the electric core shell and serves as a pole of the electric core. The electric connecting piece has at least one first conductive part. The first conductive part is in the form of a hole or a rod. The battery module comprises the electric core. The electric connecting piece of the application can be conductively connected with other electric connecting pieces or connecting pieces to be connected through the first conductive part. The first conductive part is in the form of a hole or a rod, can be connected through splicing and insertion, is convenient to disassemble and assemble, and has low maintenance cost. In addition, the inner wall or the outer wall of the first conductive part is used for conduction, the contact area is increased, the connection is stable, and the conduction is stable.

Description

Technical Field

[0001] This invention relates to the field of batteries, and more specifically to a battery cell and a battery module. Background Technology

[0002] Battery modules are mainly composed of multiple battery cells connected electrically. In existing processes, the terminals of multiple battery cells need to be welded together through busbars or connecting pieces to achieve electrical connection. Existing terminals typically have a small contact area for electrical connection.

[0003] The current problems include: 1. Complex and inefficient welding process, high difficulty in disassembling and assembling battery modules, and difficult and costly maintenance. 2. Small contact area and unstable connection and conductivity when the terminals are electrically connected. Summary of the Invention

[0004] In order to solve one or more of the above-mentioned technical problems, the present invention provides a battery cell and a battery module.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: an electrical connector having at least one first conductive part, wherein the first conductive part is a hole or a rod.

[0006] The electrical connector of the present invention can be electrically connected to other electrical connectors or components to be connected via a first conductive part. The first conductive part adopts a hole or rod-shaped structure, which allows for interlocking connections, making assembly and disassembly convenient and reducing maintenance costs. Furthermore, both the inner and outer walls of the first conductive part are used for conductivity, increasing the contact area and resulting in a robust connection and stable conductivity.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the first conductive part is a through hole or a blind hole.

[0009] Correspondingly, the component connected to the first conductive part is rod-shaped.

[0010] Furthermore, the inner wall of the first conductive part is provided with an elastic conductive liner.

[0011] The elastic conductive liner can be elastically pressed and conductive with the rod-shaped structure inserted into the first conductive part, thus achieving an interference fit without the need for additional screws or bolts or other fasteners. Vibration or shaking during use will not cause the rod-shaped structure to dislodge, ensuring high reliability. Furthermore, because the elastic conductive liner is an elastic structure, it can be easily disassembled when the rod-shaped structure is forcefully pulled out of the first conductive part.

[0012] Furthermore, the first conductive part is rod-shaped, and the first conductive part is an elastic conductive rod or its outer wall is provided with an elastic conductive liner, or the first conductive part is a rod-shaped with a C-shaped cross section.

[0013] Correspondingly, the component connected to the first conductive part has a hole adapted to the first conductive part.

[0014] Furthermore, there are multiple first conductive parts.

[0015] Having multiple first conductive parts on an electrical connector can further ensure the reliability of the connection process.

[0016] Furthermore, the plurality of the first conductive parts are parallel to each other.

[0017] The electrical connectors have a compact structure.

[0018] Furthermore, the electrical connector has an inner protrusion and the first conductive portion on both sides.

[0019] During installation, the protrusion inside the electrical connector serves to position the connector and also allows for conductive connection with components inside the housing.

[0020] The present invention also provides a battery cell, the battery cell comprising a battery cell housing and at least one of the aforementioned electrical connectors, the electrical connectors being mounted on the battery cell housing.

[0021] Electrical connectors are installed on the cell housing and serve as the terminals of the cell for connecting multiple cells.

[0022] Furthermore, the electrical connector is fixed to the outside of the battery cell housing, the battery cell housing has an inner protruding through hole, and the inner protrusion of the electrical connector is located inside the inner protruding through hole.

[0023] The protrusion inside the electrical connector serves to position and install the battery cell housing, and also connects to the core stack inside the battery cell housing and conducts electricity.

[0024] Furthermore, there are two electrical connectors.

[0025] The two electrical connectors serve as the positive and negative terminals of the battery cell, respectively.

[0026] The present invention also provides a battery module including at least two of the aforementioned battery cells, the battery module further including a battery cell connector, the battery cell connector being connected to a first conductive portion of the at least two of the battery cells.

[0027] The cells in the battery module are connected by cell connectors, which cooperate and connect with the first conductive part of the electrical connector in the cell.

[0028] Furthermore, the battery cell connector includes at least two second conductive portions connected together and conducting electricity, and the at least two second conductive portions are detachably plugged into the first conductive portions of at least two of the battery cells.

[0029] The second conductive part is detachably plugged into the first conductive part, making disassembly and assembly convenient. The increased contact area between the two parts ensures a stable connection and consistent conductivity. This facilitates repair and maintenance, avoiding complex welding processes.

[0030] Furthermore, the first conductive part is a through hole or a blind hole, the second conductive part is an elastic conductive rod, or its outer wall is provided with an elastic conductive liner, and the second conductive part is connected to the first conductive part of the battery cell by interference fit.

[0031] The second conductive part is an elastic rod-shaped component. It elastically presses against the hole in the first conductive part, achieving an interference fit and eliminating the need for additional screws or bolts. Vibrations or shaking during use will not cause the rod-shaped structure to dislodge, ensuring high reliability. Furthermore, because the elastic conductive rod or elastic conductive outer liner is an elastic structure, it deforms when the second conductive part is pulled out, allowing for easy disassembly.

[0032] Furthermore, there are at least three second conductive parts, and there are at least two groups of second conductive parts. The second conductive part groups are arranged one-to-one with the battery cells, and the second conductive part of each second conductive part group is arranged one-to-one with the first conductive part of the electrical connector of the corresponding battery cell and is detachably connected.

[0033] Each electrical connector may be configured with one or at least two first conductive parts. All second conductive parts in each group of second conductive parts are configured in one-to-one correspondence with the first conductive parts of the corresponding electrical connector and are detachably connected. Having at least two first conductive parts on an electrical connector further ensures the reliability of the connection process.

[0034] Furthermore, there are at least four second conductive parts, and the number is even. Each group of second conductive parts includes two second conductive parts, and each electrical connector has two first conductive parts.

[0035] Furthermore, the cell connector is connected to the first conductive portion of the positive terminal of one of the cells and the first conductive portion of the negative terminal of the other cell.

[0036] Cell connectors connect two cells electrically, and multiple cells connected electrically form a battery module.

[0037] Furthermore, all the battery cells are stacked sequentially, and the first conductive portions of all the battery cells are parallel to each other.

[0038] The battery module has a compact structure and high space utilization.

[0039] Furthermore, the battery module also includes a module housing, the battery cells are installed inside the module housing, the inner wall of the module housing has at least two battery cell slots, and the battery cell housing edge has a rolled edge structure, the rolled edge structure being inserted into the battery cell slots one by one.

[0040] The rolled edge structure of the battery cell casing ensures a tight seal, eliminating the need for bolts or other fasteners to install the top cover, resulting in a compact structure. Simultaneously, the rolled edge structure mates with the battery cell slot, which serves to position and install the battery cell.

[0041] Furthermore, the sidewall of the module housing corresponding to the electrical connector of the battery cell is a liquid cooling plate.

[0042] The liquid cooling plate is integrated with the side wall of the module housing, which reduces the number of battery module components, lightens the weight of the battery module, and results in high energy density.

[0043] Furthermore, the inner and / or outer walls of the liquid cooling plate have heat dissipation fins.

[0044] The liquid cooling plate is equipped with heat dissipation fins, which can serve both liquid cooling and air cooling purposes. Attached Figure Description

[0045] Figure 1 This is a front view of the electrical connector of the present invention; Figure 2 for Figure 1 Sectional view of the electrical connector along line AA; Figure 3 This is a partial structural diagram of the battery cell of the present invention; Figure 4 This is a structural diagram of the battery module of the present invention, with part of the module housing hidden in the diagram; Figure 5 for Figure 4 An enlarged view at point B of one type of battery module structure, wherein each cell connector has two second conductive parts; Figure 6 for Figure 4 An enlarged view at point B of another battery module structure, in which each cell connector has two second conductive parts; Figure 7 This is a partial structural diagram of a first embodiment of the second conductive part of the present invention; Figure 8 This is a partial structural diagram of a second embodiment of the second conductive part of the present invention; Figure 9 This is a partial structural diagram of a third embodiment of the second conductive part of the present invention; Figure 10 This is a partial structural diagram of a fourth embodiment of the second conductive part of the present invention.

[0046] The attached diagram lists the components represented by each number as follows: 1. Electrical connector; 101. First conductive part; 102. Inner protrusion of electrical connector; 2. Battery cell housing; 3. Battery cell connector; 301. Second conductive part; 4. Module housing. Detailed Implementation

[0047] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0048] Example 1 like Figure 1 and Figure 2 As shown, this embodiment provides an electrical connector 1 having at least one first conductive portion 101, which is a hole or rod-shaped portion.

[0049] In this embodiment, the electrical connector can be electrically connected to other electrical connectors 1 or components to be connected via the first conductive part 101. The first conductive part 101 is in the form of a hole or a rod, and can be interlocked with rod-shaped or perforated components to be connected, making disassembly and assembly convenient and reducing maintenance costs. Furthermore, both the inner and outer walls of the first conductive part 101 are used for conductivity, increasing the contact area and ensuring a stable connection and conductivity.

[0050] The electrical connector in this embodiment can be used as a terminal post of a battery cell, or as an electrode of a battery module or battery pack.

[0051] Example 2 Based on Embodiment 1, the first conductive part 101 is a through hole or a blind hole.

[0052] The cross-section (plane perpendicular to its axis) of the through hole or blind hole can be any geometric shape, such as a circle, a polygon, etc.

[0053] After the rod-shaped connector is inserted into the first conductive part 101, the two can be connected by interference fit, welding, or fastening.

[0054] Example 3 Based on Embodiment 2, the inner wall of the first conductive part 101 is provided with an elastic conductive liner.

[0055] The elastic conductive liner can be a plurality of strip springs arranged along the axial direction of the first conductive part 101, and the strip springs are evenly distributed around the circumference of the first conductive part 101. Alternatively, the elastic conductive liner can also be an annular conductive sheet arranged coaxially with the first conductive part 101, and the annular conductive sheet has a certain elasticity and can be elastically deformed.

[0056] When the rod-shaped structure is inserted into the first conductive part 101, the elastic conductive liner is compressed and deformed, then adheres tightly to the outer wall of the rod-shaped structure. The elastic conductive liner can elastically press and conduct electricity with the rod-shaped structure inserted into the first conductive part 101, thus achieving an interference fit without the need for additional screws or bolts or other fasteners. Vibration or shaking during use will not cause the rod-shaped structure to come out, ensuring high reliability. Furthermore, because the elastic conductive liner is an elastic structure, it can be easily disassembled when the rod-shaped structure is forcefully pulled out of the first conductive part 101.

[0057] Example 4 Based on Embodiment 1, the first conductive part 101 is rod-shaped, the first conductive part 101 is an elastic conductive rod or its outer wall is provided with an elastic conductive liner, or the first conductive part 101 is rod-shaped with a C-shaped cross section.

[0058] The cross-section (plane perpendicular to its axis) of the rod-shaped first conductive part 101 can be of any geometric shape, such as a circle or a polygon. Correspondingly, the component to be connected to the first conductive part 101 has a hole adapted to the first conductive part, and the first conductive part 101 is inserted into the hole of the component to be connected.

[0059] It should be noted that the first conductive part 101 is rod-shaped, meaning that its whole body is rod-shaped. Without affecting its use, any solution with hollow or protruding parts on its side wall is within the protection scope of this embodiment.

[0060] In particular, such as Figure 3 As shown, when the first conductive part 101 is a rod with a C-shaped cross-section, it is inserted into the hole of the component to be connected. An expandable component, such as an expansion bolt, is driven into the C-shaped structure of the first conductive part 101 to expand the C-shaped structure outward, thereby achieving an interference fit between the first conductive part 101 and the hole of the component to be connected. More preferably, to facilitate the insertion of the C-shaped structure into the component to be connected, the cross-sectional structure of the component to be connected is also C-shaped, with its interior used to insert the first conductive part 101.

[0061] Example 5 Based on any one of Embodiments 1 to 4, there are multiple first conductive parts 101.

[0062] A plurality of first conductive parts 101 are provided on an electrical connector 1, which can further ensure the reliability of the connection process.

[0063] Multiple first conductive parts 101 can be arranged arbitrarily.

[0064] Example 6 Based on embodiment 5, preferably, the plurality of first conductive portions 101 are parallel to each other. The structure of the plurality of electrical connectors 1 is compact.

[0065] Example 7 Based on any one of Embodiments 1 to 6, the electrical connector 1 has an inner protrusion 102 and the first conductive part 101 on both sides.

[0066] When the electrical connector 1 is installed, the protrusion 102 inside the electrical connector is embedded in the housing, which serves to position the connector and allows it to make conductive connections with the components inside the housing.

[0067] The protrusion 102 inside the electrical connector can be at least one.

[0068] Example 8 like Figure 3 As shown, the present invention also provides a battery cell, the battery cell including a battery cell housing 2 and at least one electrical connector 1 as described in any one of Embodiments 1 to 7, the electrical connector 1 being mounted on the battery cell housing 2.

[0069] Electrical connector 1 is installed on the cell housing 2 and serves as the cell terminal for electrical connection between multiple cells.

[0070] The electrical connector 1 is embedded in the side wall of the cell housing 2, or installed on the outer side of the side wall of the cell housing 2. The electrical connector 1 and the cell housing 2 can be detachably connected or fixedly connected.

[0071] At least one core stack is installed inside the cell housing 2. The electrical connector 1 passes through the cell housing 2 via a conductive part and is connected to the tabs of the core stack and conducts electricity, or the electrical connector 1 is partially or completely embedded in the side wall of the cell housing 2, and is connected to the tabs of the core stack and conducts electricity on the side facing inwards from the cell housing 2.

[0072] Example 9 Based on embodiment 8, the electrical connector 1 is fixed to the outside of the battery cell housing 2, the battery cell housing 2 has an inner protruding through hole, and the inner protrusion 102 of the electrical connector 1 is located inside the inner protruding through hole.

[0073] The protrusion 102 inside the electrical connector serves to position and install with the battery cell housing 2, and is also used to connect with and conduct electricity to the core stack inside the battery cell housing 2.

[0074] Specifically, the protrusion 102 inside the electrical connector is connected to and conducts electricity with the tabs of the core stack.

[0075] Example 10 Based on Embodiment 8 or Embodiment 9, there are two electrical connectors 1.

[0076] The two electrical connectors 1 serve as the positive and negative terminals of the battery cell, respectively.

[0077] More specifically, the positive terminal is connected to the positive tab of all core stacks, and the negative terminal is connected to the negative tab of all core stacks.

[0078] Example 11 like Figures 4 to 10 As shown, the present invention also provides a battery module including at least two battery cells as described in any one of embodiments 8 to 10. The battery module further includes a battery cell connector 3, which is connected to the first conductive portion 101 of at least two of the battery cells.

[0079] The battery cells in the battery module are connected via cell connectors 3, which engage and connect with the first conductive part 101 of the electrical connector 1 in the battery cell. The cell connector 3 and the first conductive part 101 can be detachably or fixedly connected.

[0080] At least two battery cells can be electrically connected through at least one battery cell connector 3. For example, multiple battery cells can be electrically connected through one battery cell connector 3, or, among multiple battery cells, each pair can be electrically connected through one battery cell connector 3.

[0081] Example 12 Based on embodiment 11, the battery cell connector 3 includes at least two second conductive parts 301 connected together and conducting electricity, and the at least two second conductive parts 301 are detachably plugged into the first conductive parts 101 of the at least two battery cells.

[0082] The second conductive part 301 is detachably plugged into the first conductive part 101, making disassembly and assembly convenient. The increased contact area between the two parts ensures a stable connection and reliable conductivity. This facilitates repair and maintenance, avoiding complex welding processes.

[0083] One cell connector 3 can be connected to two or more cells simultaneously. Optionally, each connector 1 has a first conductive part 101, and a second conductive part 301 is provided and connected to the first conductive part 101 in a one-to-one correspondence; or, each connector 1 has multiple first conductive parts 101, and the cell connector 3 is connected to at least one first conductive part 101 on the corresponding cell's connector 1.

[0084] Example 13 Based on Embodiment 12, the first conductive part 101 is a through hole or a blind hole, such as... Figure 10 As shown, the second conductive part 301 has an external thread, and the second conductive part 301 is detachably connected to the first conductive part 101 by the thread; or, the second conductive part 301 is an elastic conductive rod, or its outer wall is provided with an elastic conductive liner, and the second conductive part 301 is connected to the first conductive part 101 of the battery cell by an interference fit.

[0085] The second conductive part 301 is an elastic rod-shaped component. It elastically presses against the hole in the first conductive part 101, achieving an interference fit without the need for additional screws or bolts. Vibrations or shaking during use will not cause the rod-shaped structure to dislodge, ensuring high reliability. Furthermore, because the elastic conductive rod or elastic conductive outer liner is an elastic structure, when the second conductive part 301 is pulled out forcefully, the elastic structure deforms, allowing for easy disassembly.

[0086] The elastic conductive rod can be a spring rod or a rod made of an elastic conductive material. Specifically, a spring rod is, for example... Figure 9 As shown, a spring-like structure is formed by spirally winding a metal wire. When the spring rod is inserted into the first conductive part 101, both ends of the spring rod are first rotated in the spiral direction to reduce the diameter of the spring rod and fix its shape. Then, it is inserted into the first conductive part 101. For example, a guide rod can be temporarily fixed to the end of the spring rod. The guide rod first passes through the first conductive part 101, then drives the spring rod to twist and pass through the first conductive part 101. Subsequently, the end of the spring rod is released to restore its diameter, thereby achieving an interference fit with the first conductive part 101.

[0087] For elastic conductive outer lining, such as Figure 7 As shown, multiple strip-shaped springs (e.g., beryllium copper springs) can be arranged along the axial direction of the second conductive part 301, and the strip-shaped springs are uniformly distributed circumferentially in the second conductive part 301. Alternatively, the elastic conductive outer liner can also be an annular conductive sheet arranged coaxially with the second conductive part 301 and perpendicular to the axis of the second conductive part 301, the annular conductive sheet having a certain elasticity and being elastically deformable. Or as... Figure 8 As shown, the elastic conductive outer liner includes at least two sets of elastic sheet groups arranged at intervals along the axis of the second conductive part 301. Each elastic sheet group includes multiple elastic sheets arranged circumferentially along the second conductive part 301. Each elastic sheet is arranged radially along the second conductive part 301, and one end of the elastic sheet away from the axis of the second conductive part 301 is inclined toward one end of the second conductive part 301.

[0088] Preferably, when there are multiple second conductive parts 301 in each cell connector 3, the multiple second conductive parts 301 are parallel to each other.

[0089] Example 14 Based on Embodiment 12 or Embodiment 13, the second conductive part 301 is at least three, and the second conductive part 301 is divided into at least two groups of second conductive parts. The second conductive part groups are arranged in a one-to-one correspondence with the battery cells, and the second conductive part 301 of each second conductive part group is arranged in a one-to-one correspondence with the first conductive part 101 of the electrical connector 1 of the corresponding battery cell and is detachably connected.

[0090] Each electrical connector 1 may be configured with one or at least two first conductive parts 101. All second conductive parts 301 in each group of second conductive parts are configured in one-to-one correspondence with the first conductive parts 101 of the corresponding electrical connector 1 and are detachably connected. The provision of at least two first conductive parts 101 on an electrical connector 1 further ensures the reliability of the connection process.

[0091] For example, the electrical connector 1 of the first battery cell has a first conductive part 101, and the electrical connector 1 of the second battery cell has two first conductive parts 101. The battery cell connector 3 has three second conductive parts 301, and the first group of second conductive parts includes one second conductive part 301, and the second group of second conductive parts includes two second conductive parts 301. The second conductive parts 301 of the first group of second conductive parts are correspondingly connected to one first conductive part 101 of the first battery cell, and the two second conductive parts 301 of the second group of second conductive parts are correspondingly connected to the two first conductive parts 101 of the second battery cell.

[0092] Example 15 Based on Example 14, such as Figure 6 As shown, there are at least four second conductive parts 301 and the number is even. Each group of second conductive parts includes two second conductive parts 301, and each electrical connector 1 has two first conductive parts 101.

[0093] Specifically, each of the two second conductive parts 301 in each second conductive part group is connected to the corresponding electrical connector 1, which has two first conductive parts 101 in a one-to-one correspondence.

[0094] Example 16 Based on any one of Embodiments 11 to 15, the cell connector 3 is connected to the first conductive part 101 of the positive terminal of one of the cells and the first conductive part 101 of the negative terminal of the other cell.

[0095] The cell connector 3 connects two cells electrically, and multiple cells connected electrically form a battery module.

[0096] Specifically, each battery cell contains two electrical connectors 1, which serve as the positive and negative terminals of the battery cell, respectively.

[0097] Example 17 Based on any one of Embodiments 11 to 16, all the battery cells are stacked sequentially, and the first conductive portions 101 of all the battery cells are parallel to each other.

[0098] The battery module has a compact structure and high space utilization.

[0099] Specifically, based on Embodiment 16, preferably, a positive terminal and a negative terminal are respectively provided at both ends of the battery cell, and the positive and negative terminals of all battery cells are arranged alternately. That is, the battery cells are stacked sequentially to form a battery cell group, with adjacent battery cells placed in opposite directions. Looking from one end of the battery cell group, along the stacking direction of the battery cells, the order is: the positive terminal of the first battery cell, the negative terminal of the second battery cell, the positive terminal of the third battery cell, and so on. The other end of the battery cell group is correspondingly: the negative terminal of the first battery cell, the positive terminal of the second battery cell, the negative terminal of the third battery cell, and so on.

[0100] Example 18 Based on any one of Embodiments 11 to 17, the battery module further includes a module housing 4, the battery cell is installed in the module housing 4, the inner wall of the module housing 4 has at least two battery cell slots, and the edge of the battery cell housing 2 of the battery cell has a rolled edge structure, which is inserted into the battery cell slots one by one.

[0101] The rolled edge structure of the cell housing 2 achieves a seal, providing excellent sealing. The cell housing 2 eliminates the need for bolts or other fasteners to install the top cover, resulting in a compact structure. Simultaneously, the rolled edge structure mates with the cell slot, which serves to position and install the cell.

[0102] Specifically, the cell housing 2 includes a main housing and a housing top cover. The housing top cover closes the top opening of the main housing, and then the edges of the two are jointly rolled up to form the rolled edge structure.

[0103] In particular, based on Embodiment 17, all the cells are stacked sequentially, with at least two cell slots parallel to each other.

[0104] Example 19 Based on any one of Embodiments 11 to 18, the side wall of the module housing 4 corresponding to the electrical connector 1 of the battery cell is a liquid cooling plate.

[0105] The liquid cooling plate is integrated with the four side walls of the module housing, which reduces the number of battery module components, lightens the weight of the battery module, and results in high energy density.

[0106] If all electrical connectors 1 of all cells in the battery module face one side wall of the module housing 4, then that side wall is configured as a liquid cooling plate. If all electrical connectors 1 of all cells in the battery module face at least two side walls of the module housing 4 respectively, then at least two side walls are liquid cooling plates.

[0107] Specifically, the liquid cooling plate is equipped with liquid cooling pipes. The liquid cooling pipes can be independent pipes and completely enclosed inside the liquid cooling plate; or the liquid cooling pipes can be embedded in the side of the liquid cooling plate facing the module housing 4, so that the liquid cooling pipes can abut against the corresponding electrical connectors 1, thereby accelerating the heat exchange efficiency; or the liquid cooling pipes can be formed by drilling holes inside the liquid cooling plate.

[0108] Example 20 Based on Example 19, the inner and / or outer walls of the liquid cooling plate have heat dissipation fins.

[0109] The liquid cooling plate is equipped with heat dissipation fins, which can serve both liquid cooling and air cooling purposes.

[0110] In the description of this invention, it should be noted that the terms "axial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0111] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0112] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0113] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0114] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0115] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery cell, characterized in that, The battery cell includes a battery cell housing (2) and at least one electrical connector (1). The electrical connector (1) is mounted on the battery cell housing (2) and serves as the electrode post of the battery cell. The electrical connector (1) has at least one first conductive part (101). The first conductive part (101) is a hole or rod-shaped part, which is connected to the rod-shaped or hole-shaped part to be connected. The electrical connector (1) is a rectangular plate-shaped structure. The first conductive part (101) extends along the length direction of the rectangular plate-shaped structure. The two sides of the electrical connector (1) have an inner protrusion (102) and the first conductive part (101), respectively. The electrical connector (1) is fixed to the outside of the battery cell housing (2). The battery cell housing (2) has an inner protrusion through hole. The inner protrusion (102) of the electrical connector is located in the inner protrusion through hole. The inner protrusion (102) of the electrical connector is connected to the electrode tab of the core stack and conducts electricity.

2. The battery cell according to claim 1, characterized in that, The first conductive part (101) is a through hole or a blind hole.

3. A battery cell according to claim 2, characterized in that, The inner wall of the first conductive part (101) is provided with an elastic conductive liner.

4. A battery cell according to claim 1, characterized in that, The first conductive part (101) is rod-shaped, and the first conductive part (101) is an elastic conductive rod or its outer wall is provided with an elastic conductive liner, or the first conductive part (101) is rod-shaped with a C-shaped cross section.

5. A battery cell according to any one of claims 1-4, characterized in that, There are multiple first conductive parts (101), and the multiple first conductive parts (101) are parallel to each other.

6. A battery module, characterized in that, The battery module includes at least two battery cells as described in any one of claims 1-5, and further includes a battery cell connector (3) connected to the first conductive portion (101) of at least two of the battery cells.

7. A battery module according to claim 6, characterized in that, The battery cell connector (3) includes at least two second conductive parts (301) connected together and conducting electricity, and the at least two second conductive parts (301) are detachably plugged into the first conductive parts (101) of the at least two battery cells.

8. A battery module according to claim 7, characterized in that, The first conductive part (101) is a through hole or a blind hole, the second conductive part (301) is an elastic conductive rod, or its outer wall is provided with an elastic conductive liner, and the second conductive part (301) is connected to the first conductive part (101) of the battery cell by interference fit.

9. A battery module according to any one of claims 6-8, characterized in that, The battery module also includes a module housing (4), the battery cell is installed in the module housing (4), the inner wall of the module housing (4) has at least two battery cell slots, the edge of the battery cell housing (2) of the battery cell has a rolled edge structure, and the rolled edge structure is inserted into the battery cell slot one by one.

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