Battery post, battery monomer, battery and power utilization device

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery pole, a battery monomer, a battery and an electric device, the battery pole comprises a pole body, the pole body is provided with an accommodating cavity, the accommodating cavity is provided with a first opening formed at the upper end of the pole body along the height direction of the pole body, and the first opening is provided with a second opening formed at the lower end of the pole body. The bottom wall of the accommodating cavity is used for being electrically connected with a tab of a battery cell, and a connecting area used for being electrically connected with a busbar is formed on the side wall of the accommodating cavity; in the assembling process of the battery pole and the busbar, the internal space of the accommodating cavity is effectively utilized, and the battery pole connecting end of the busbar is accommodated in the accommodating cavity, so that the assembling height of the battery pole connecting end of the busbar in the height direction of the pole body is effectively reduced; therefore, the assembly height of the busbar in the height direction of the pole body is reduced, and the space utilization rate of the battery is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of batteries, specifically relating to battery terminals, battery cells, batteries, and electrical devices. Background Technology

[0002] A secondary battery, also known as a rechargeable battery or accumulator, is a type of battery that can be reused after being discharged by recharging to reactivate the active materials. This type of battery utilizes the reversibility of chemical reactions, converting chemical energy into electrical energy during discharge and using electrical energy to restore the chemical system during charging, so that it can be used again after discharge.

[0003] Currently, batteries generally consist of a busbar and multiple battery cells. The busbar is connected to the multiple battery cells, thereby connecting them in series, parallel, or mixed connections. However, during the connection process between the busbar and the battery cells, because the busbar is welded to the end face of the battery cell's terminal post, the busbar occupies a significant amount of space in the height direction of the battery cell, resulting in low space utilization of the battery. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of the existing technology by providing a battery terminal, a battery cell, a battery, and an electrical device, thereby solving the technical problem of low space utilization in the battery when the busbar is welded to the end face of the battery cell terminal, which occupies a lot of space.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides a battery terminal, including a terminal body, the terminal body having a receiving cavity, the receiving cavity having a first opening formed at the upper end of the terminal body along the height direction of the terminal body, the bottom wall of the receiving cavity being used for electrical connection with the tab of the battery cell, and the side wall of the receiving cavity having a connection area for electrical connection with the busbar.

[0007] In some embodiments, the sidewalls of the receiving cavity are inclined inwards towards the interior of the receiving cavity, and the width of the bottom wall of the receiving cavity is less than the width of the first opening.

[0008] In some embodiments, the receiving cavity is provided with a stepped portion, and the sidewall of the receiving cavity has a first surface and a second surface, the first surface facing the interior of the receiving cavity, the second surface facing away from the interior of the receiving cavity, and the first surface facing the interior of the receiving cavity protruding to form the stepped portion;

[0009] Alternatively, the first surface protrudes into the cavity, and the second surface is recessed into the cavity to form the stepped portion;

[0010] The step surface of the step portion is located on the first surface and is parallel to the bottom wall of the receiving cavity, and the connecting area is located on the step surface of the step portion.

[0011] Secondly, this utility model provides a battery cell, including a housing, a top cover, a battery cell, and battery terminals as described in the above embodiment. The housing has a cavity, the battery cell is disposed in the cavity, the top cover is disposed in a second opening of the housing, the top cover has a through hole, the battery terminals pass through the through hole, and an insulating seal is provided between the battery terminals and the top cover. The tabs of the battery cell are electrically connected to the bottom wall of the receiving cavity.

[0012] In some embodiments, the inner wall of the insulating seal is provided with an annular groove, and the edge of the first opening at the upper end of the battery terminal is provided with a flange, which is in concave-convex fit with the annular groove.

[0013] Thirdly, this utility model provides a battery, including a busbar and multiple battery cells of the above embodiments. Each battery cell has a battery terminal provided with a conductive connector. The conductive connector includes a terminal connection portion and a busbar connection portion. The terminal connection portion is disposed inside the receiving cavity and is electrically connected to the connection area. One end of the busbar connection portion is connected to the terminal connection portion, and the other end of the busbar connection portion extends to the outside of the receiving cavity. Each battery cell is electrically connected to the busbar through the busbar connection portion.

[0014] In some embodiments, the pole connecting portion is electrically connected to the stepped surface of the stepped portion of the receiving cavity, and the pole connecting portion is provided with a hollow, the hollow corresponding to the position of the bottom wall of the receiving cavity.

[0015] In some embodiments, the distance K between the inner edge of the hollowed-out cavity and the edge of the bottom wall of the receiving cavity satisfies the relationship: 0≤K≤5mm.

[0016] In some embodiments, the other end of the bus connection extends through the insulating seal of the battery cell to the outside of the receiving cavity.

[0017] In some embodiments, the busbar connection portion is provided with a protrusion, which engages with the busbar.

[0018] Fourthly, this utility model provides an electrical device, including the battery of the above embodiments, or the battery cell of the above embodiments.

[0019] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0020] This utility model discloses a battery terminal post. By providing a terminal post body with a receiving cavity, the receiving cavity has a first opening formed at the upper end of the terminal post body along the height direction of the terminal post body. The side wall of the receiving cavity has a connection area for electrical connection with the busbar. During the assembly process of the battery terminal post and the busbar, the internal space of the receiving cavity is effectively utilized to house the battery terminal post connection end of the busbar inside the receiving cavity, effectively reducing the assembly height of the battery terminal post connection end of the busbar in the height direction of the terminal post body, thereby reducing the assembly height of the busbar in the height direction of the terminal post body and improving the space utilization rate of the battery. In addition, since the battery cell's tab is used for electrical connection with the bottom wall of the receiving cavity, and the busbar is used for electrical connection with the connection area of ​​the side wall of the receiving cavity, the connection points of the battery cell's tab and the battery terminal post, as well as the connection points of the busbar and the battery terminal post, are effectively not in the same area. This effectively avoids potential spatial conflicts or mutual interference between the battery cell's tab and the busbar during the connection process, and also significantly reduces the risk of detachment caused by structural overlap after connection.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the battery cell of this utility model.

[0024] Figure 2 This is another structural schematic diagram of the battery cell of this utility model.

[0025] Figure 3 This is a cross-sectional view of the battery cell of this utility model.

[0026] Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.

[0027] Figure 5 This is another cross-sectional view of the battery cell of this utility model.

[0028] Figure 6 for Figure 5 A magnified structural diagram at point B in the middle.

[0029] Figure 7This is a schematic diagram of the connection between the battery terminal and the conductive connector of this utility model.

[0030] Figure 8 This is a schematic diagram of the structure of the battery terminal of this utility model.

[0031] Figure 9 This is a cross-sectional view of the battery terminal of this utility model.

[0032] Figure 10 This is a schematic diagram of the conductive connector of this utility model.

[0033] Figure 11 This is another structural schematic diagram of the conductive connector of this utility model.

[0034] The reference numerals in the attached figures are explained as follows:

[0035] 100. Battery cell;

[0036] 10. Battery terminal; 11. Terminal body; 111. Receiving cavity; 112. First opening; 113. Side wall of the receiving cavity; 1131. First surface; 1132. Second surface; 114. Bottom wall of the receiving cavity; 12. Stepped portion; 121. Stepped surface; 13. Flange;

[0037] 20. Shell;

[0038] 30. Top cover; 31. Through hole;

[0039] 40. Battery cell; 41. Battery cell tabs;

[0040] 50. Insulating seal; 51. Annular groove;

[0041] 200. Conductive connector; 210. Terminal post connection; 211. Hollowed-out section; 220. Busbar connection; 221. Protrusion; 222. Bending section; 2221. Vertical section; 2222. Horizontal section; 2223. Transition section;

[0042] a) The height direction of the pole body; b) The width of the bottom wall of the receiving cavity; c) The width of the first opening. Detailed Implementation

[0043] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0044] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 utility model according to the specific circumstances.

[0046] The following will be combined with the appendix Figures 1-11 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0047] The electrical device of this utility model embodiment includes a battery, or a battery cell 100. The electrical device can be an automobile, mobile phone, portable device, laptop, ship, spacecraft, electric toy, and power tool, etc. Automobiles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application embodiment does not impose any special limitations on the above-mentioned electrical devices.

[0048] The battery of this utility model embodiment includes a busbar and a plurality of battery cells 100, and the battery terminals 10 of each battery cell 100 are electrically connected to the busbar.

[0049] Please see Figures 1-6 The battery cell 100 of this utility model embodiment includes a housing 20, a top cover 30, a battery cell 40, and a battery terminal 10. The housing 20 has a cavity, the battery cell 40 is disposed in the cavity, the top cover 30 is disposed in the second opening of the housing 20, the top cover 30 is provided with a through hole 31, the battery terminal 10 passes through the through hole 31, and an insulating seal 50 is provided between the battery terminal 10 and the top cover 30. The electrode tab 41 of the battery cell is electrically connected to the battery terminal 10.

[0050] Please see Figures 1-9 The battery terminal 10 of this utility model embodiment includes a terminal body 11, the terminal body 11 having a receiving cavity 111, the receiving cavity 111 having a first opening 112 formed at the upper end of the terminal body 11 along the height direction a of the terminal body 11, the bottom wall 114 of the receiving cavity 111 being used for electrical connection with the tab 41 of the battery cell, and the side wall 113 of the receiving cavity 111 having a connection area for electrical connection with the busbar.

[0051] Compared with the prior art, the battery terminal 10 of this utility model embodiment, by providing a terminal body 11 with a receiving cavity 111, and along the height direction a of the terminal body 11, the receiving cavity 111 has a first opening 112 formed at the upper end of the terminal body 11, and the side wall 113 of the receiving cavity 111 forms a connection area for electrical connection with the busbar, effectively utilizes the internal space of the receiving cavity 111 during the assembly process of the battery terminal 10 and the busbar, and houses the battery terminal 10 connection end of the busbar inside the receiving cavity 111, effectively reducing the assembly height of the battery terminal 10 connection end of the busbar in the height direction a of the terminal body 11, thereby reducing the assembly height of the busbar in the height direction a of the terminal body 11 and improving the space utilization rate of the battery. Furthermore, since the tab 41 of the battery cell is used to electrically connect to the bottom wall 114 of the receiving cavity 111, and the busbar is used to electrically connect to the connection area of ​​the side wall 113 of the receiving cavity 111, the connection points of the tab 41 of the battery cell and the battery terminal 10, as well as the connection points of the busbar and the battery terminal 10, are not in the same area. This effectively avoids spatial conflicts or mutual interference that may occur when connecting the tab 41 of the battery cell and the busbar, and also significantly reduces the risk of detachment caused by structural overlap after connection.

[0052] Please see Figures 3-9In some embodiments, the sidewall 113 of the receiving cavity 111 is inclined inwards towards the interior of the receiving cavity 111, and the width b of the bottom wall 114 of the receiving cavity 111 is smaller than the width c of the first opening 112. By setting the sidewall 113 of the receiving cavity 111 to be inclined inwards towards the interior of the receiving cavity 111, and the width b of the bottom wall 114 of the receiving cavity 111 being smaller than the width c of the first opening 112, the receiving cavity 111 is effectively designed as a structure that is wider at the top and narrower at the bottom. During assembly, the sidewall 113 of the receiving cavity 111 can provide support for the busbar, which helps to reduce spatial interference between the battery cell tab 41 and the busbar during the connection process, allowing them to be connected more smoothly to different areas of the battery terminal 10, avoiding connection difficulties or reduced connection quality due to space limitations. In addition, because the width c of the first opening 112 is relatively large, it is convenient for the introduction and positioning of the busbar, and then guided to the correct connection position by the inclined sidewall.

[0053] Please see Figures 3-9In some embodiments, the receiving cavity 111 is provided with a stepped portion 12, and the sidewall 113 of the receiving cavity 111 has a first surface 1131 and a second surface 1132. The first surface 1131 faces the interior of the receiving cavity 111, and the second surface 1132 faces away from the interior of the receiving cavity 111. The first surface 1131 protrudes into the interior of the receiving cavity 111 to form the stepped portion 12; or, the first surface 1131 protrudes into the interior of the receiving cavity 111, and the second surface 1132 is recessed into the interior of the receiving cavity 111 to form the stepped portion 12; wherein, the stepped surface 121 of the stepped portion 12 is located on the first surface 1131 and is parallel to the bottom wall 114 of the receiving cavity 111, and the connecting area is located on the stepped surface 121 of the stepped portion 12. With the step portion 12 positioned on the step surface 121, the connection area effectively provides support for the busbar, reducing spatial interference between the battery cell tab 41 and the busbar during connection. This allows both to connect more smoothly to different areas of the battery terminal 10, avoiding connection difficulties or reduced connection quality due to space constraints. The step surface 121 of the step portion 12 is parallel to the bottom wall 114 of the receiving cavity 111, effectively improving the flatness of the connection area and increasing the contact area between the busbar and the battery terminal 10. This reduces the risk of poor contact or connection failure due to uneven or tilted connection surfaces, improving the connection stability between the busbar and the battery terminal 10. Simultaneously, the step portion 12 allows for more flexible space utilization in the receiving cavity 111 along the height direction a of the terminal body 11. The step portion 12 provides sufficient connection space and support for the busbar without increasing the overall height of the battery terminal 10, further improving the battery's space utilization. Furthermore, due to the step portion 12, the battery terminal 10 of this invention has a larger surface area compared to a hollow terminal, which helps to improve heat dissipation efficiency and reduce resistance, making it very suitable for high-power charging and discharging applications.

[0054] Meanwhile, when the first surface 1131 protrudes into the interior of the receiving cavity 111 to form a step portion 12, the presence of the step portion 12 increases the thickness of the side wall 113 of the receiving cavity 111, especially near the connection area, making the entire structure more robust and able to resist external impacts and vibrations.

[0055] When the first surface 1131 protrudes into the cavity 111 and the second surface 1132 is recessed into the cavity 111 to form a stepped portion 12, the weight of the battery terminal 10 can be reduced to a certain extent compared to the first surface 1131 protruding into the cavity 111 to form the stepped portion 12. By reducing the use of unnecessary materials, the overall weight of the battery can be reduced, thereby increasing the energy density of the battery.

[0056] Please see Figures 3-6In some embodiments, the inner wall of the insulating seal 50 is provided with an annular groove 51, and the edge of the first opening 112 at the upper end of the battery terminal 10 is provided with a flange 13, which engages with the annular groove 51. The engagement of the annular groove 51 and the flange 13 ensures a tight fit between the insulating seal 50 and the battery terminal 10, reducing the risk of electrolyte leakage or moisture infiltration due to poor sealing. Simultaneously, the engagement of the flange 13 with the annular groove 51 increases the connection area between the insulating seal 50 and the battery terminal 10, thereby enhancing the connection strength and making the entire battery structure more robust. Furthermore, the engagement design reduces the space occupied by the insulating seal 50 and the battery terminal 10 while maintaining sealing performance, resulting in a more compact overall battery structure.

[0057] Please see Figures 1-7 as well as Figures 10-11 In some embodiments, each battery cell 100 has a conductive connector 200 on its battery terminal 10. The conductive connector 200 includes a terminal connection portion 210 and a busbar connection portion 220. The terminal connection portion 210 is disposed inside the receiving cavity 111 and is electrically connected to the connection area. One end of the busbar connection portion 220 is connected to the terminal connection portion 210, and the other end of the busbar connection portion 220 extends to the outside of the receiving cavity 111. Each battery cell 100 is electrically connected to the busbar through the busbar connection portion 220. By providing the conductive connector 200, which includes the terminal connection portion 210 and the busbar connection portion 220, and the terminal connection portion 210 is disposed inside the receiving cavity 111, the assembly height of the conductive connector 200 in the height direction a of the terminal body 11 is effectively reduced, thereby reducing the assembly height of the busbar in the height direction a of the terminal body 11 and improving the space utilization of the battery. The busbar connection 220 is used to connect the terminal connection 210 and the busbar, effectively realizing the electrical connection between the battery cell 100 and the busbar, thereby realizing the series or parallel connection between the battery cells 100.

[0058] It is understandable that the conductive connector 200 and the busbar can be an integrally formed structure, that is, the conductive connector 200 and the busbar are a single component. Alternatively, the conductive connector 200 and the busbar can be separate structures, that is, the conductive connector 200 and the busbar are two separate components. When the conductive connector 200 and the busbar are separate structures, during the assembly process, the conductive connector 200 can be pre-processed on the battery terminal 10 of the battery cell 100, effectively reducing the difficulty of connecting the battery cell 100 and the busbar.

[0059] Please see Figures 3-7 as well as Figures 10-11In some embodiments, the terminal connection portion 210 is electrically connected to the stepped surface 121 of the stepped portion 12 of the receiving cavity 111. The terminal connection portion 210 has a perforation 211, which corresponds to the position of the bottom wall 114 of the receiving cavity 111. By electrically connecting the terminal connection portion 210 to the stepped surface 121 of the stepped portion 12 of the receiving cavity 111, the stepped portion 12 effectively provides sufficient connection space and support for the conductive connector 200 without increasing the overall height of the battery terminal 10. This allows the conductive connector 200 and the battery cell's tabs 41 to be connected to different areas of the battery terminal 10, avoiding connection difficulties or reduced connection quality due to space limitations, thereby further improving the battery's space utilization. Furthermore, the stepped portion 12 can increase the contact area between the conductive connector 200 and the battery terminal 10, thereby reducing the risk of poor contact or connection failure due to uneven or tilted connection surfaces, and improving the connection stability between the conductive connector 200 and the battery terminal 10.

[0060] Meanwhile, the perforation 211, located on the terminal connection portion 210, allows the equipment to identify and locate the terminal connection portion 210 and the stepped surface 121 during the connection process between the conductive connector 200 and the battery terminal 10. Furthermore, the perforation 211 corresponds to the bottom wall 114 of the receiving cavity 111, ensuring that it does not obstruct the connection between the cell's tab 41 and the battery terminal 10. This allows both the connection process between the battery terminal 10 and the conductive connector 200, and between the battery terminal 10 and the cell's tab 41, to be performed simultaneously in the same process. This design not only simplifies the process but also improves efficiency. Moreover, by providing the perforation 211 on the terminal connection portion 210, the weight of the conductive connector 200 can be effectively reduced, thereby reducing the overall weight of the battery and increasing its energy density.

[0061] It is understandable that the conductive connector 200 and the battery cell tab 41 can be connected to the battery terminal 10 by welding or by conductive adhesive.

[0062] Furthermore, along the height direction a of the pole body 11, the shape of the orthographic projection of the hollow 211 and the shape of the orthographic projection of the bottom wall 114 of the receiving cavity 111 may be the same or different. For example, when the shape of the orthographic projection of the hollow 211 and the shape of the orthographic projection of the bottom wall 114 of the receiving cavity 111 are the same, both the shape of the orthographic projection of the hollow 211 and the shape of the orthographic projection of the bottom wall 114 of the receiving cavity 111 are circular, elliptical, triangular, rectangular, trapezoidal, pentagonal, hexagonal, or octagonal. When the shape of the orthographic projection of the hollow 211 and the shape of the orthographic projection of the bottom wall 114 of the receiving cavity 111 are different, the shape of the orthographic projection of the hollow 211 is circular, and the shape of the orthographic projection of the bottom wall 114 of the receiving cavity 111 is any shape other than circular.

[0063] Please see Figures 3-7 In some embodiments, the distance K between the inner edge of the cutout 211 and the edge of the bottom wall 114 of the receiving cavity 111 satisfies the relationship: 0 ≤ K ≤ 5 mm. By setting the distance K between the inner edge of the cutout 211 and the edge of the bottom wall 114 of the receiving cavity 111, this distance K cannot be too large. That is, when K > 5 mm, the size of the cutout 211 is small, resulting in an increase in the area of ​​the bottom wall of the receiving cavity 111 that is blocked by the electrode connection portion 210. This will affect the device's recognition and positioning of the electrode connection portion 210. Furthermore, since a large area of ​​the bottom wall 114 of the receiving cavity 111 is blocked, when the conductive connector 200 and the battery cell's tab 41 are simultaneously connected to the battery terminal 10, the contact area between the battery cell's tab 41 and the battery terminal 10 will be limited, which may lead to poor contact or connection failure between the battery cell's tab 41 and the battery terminal 10. At the same time, the distance K cannot be too small. That is, when K < 0, the size of the cutout 211 is large, which will cause the cutout 211 to occupy part of the step surface 121, which will limit the contact area between the conductive connector 200 and the battery terminal 10, and may cause poor contact or connection failure between the conductive connector 200 and the battery terminal 10.

[0064] Therefore, by ensuring that the distance K between the inner edge of the hollow 211 and the edge of the bottom wall 114 of the receiving cavity 111 satisfies the relationship: 0≤K≤5mm, not only is the device's ability to identify and position the terminal connection 210 improved, but also good contact and stable connection between the battery cell's tab 41 and the battery terminal 10, as well as between the conductive connector 200 and the battery terminal 10 are guaranteed.

[0065] Understandably, when K = 0, the inner edge of the cutout 211 is flush with the edge of the stepped surface 121. When 0 < K ≤ 5 mm, the inner edge of the cutout 211 extends horizontally out of the edge of the stepped surface 121 by 0 to 5 mm, excluding 0. This design ensures that the cutout 211 does not occupy the effective space of the bottom wall of the receiving cavity 111, thereby maximizing the contact area between the battery cell tab 41 and the battery terminal 10, as well as the contact area between the conductive connector 200 and the battery terminal 10.

[0066] Specifically, the distance K between the inner edge of the cutout 211 and the edge of the bottom wall 114 of the receiving cavity 111 is 0, 0.2mm, 0.5mm, 0.9mm, 1mm, 1.1mm, 1.5mm, 1.8mm, 2mm, 2.3mm, 2.5mm, 2.9mm, 3mm, 3.1mm, 3.5mm, 3.7mm, 4mm, 4.3mm, 4.5mm, 4.6mm, 4.9mm, or 5mm. However, it is not limited to the listed values; other values ​​within the range are also applicable.

[0067] Please see Figures 5-6 In some embodiments, the other end of the busbar connection 220 extends through the insulating seal 50 of the battery cell 100 to the outside of the receiving cavity 111. This effectively shortens the distance between the busbar connection 220 and the top cover 30, thereby further reducing the assembly height of the conductive connector 200 in the height direction a of the terminal body 11, and thus reducing the assembly height of the busbar in the height direction a of the terminal body 11, improving the space utilization of the battery.

[0068] Please see Figure 2 as well as Figure 11 In some embodiments, a protrusion 221 is provided on the busbar connection portion 220, and the protrusion 221 engages with the busbar. By providing the protrusion 221, the conductive connector 200 can be engaged with the busbar through the protrusion 221, achieving positioning and installation of the conductive connector 200 and the busbar. This effectively reduces the assembly difficulty of the conductive connector 200 and the busbar, and improves the assembly efficiency. Simultaneously, it effectively ensures a tight contact between the conductive connector 200 and the busbar, preventing loosening or detachment even under vibration or external impact, thereby improving the stability and reliability of the connection between the conductive connector 200 and the busbar.

[0069] Furthermore, the busbar connection 220 has a bend 222, which includes a vertical section 2221, a horizontal section 2222, and a transition section 2223 connecting the vertical section 2221 and the horizontal section 2222. One end of the vertical section 2221 away from the transition section 2223 is connected to the pole post connection 210, and the other end of the horizontal section 2222 away from the transition section 2223 bends and extends in a direction away from the top cover 30 to form a protrusion 221.

[0070] It is understandable that the horizontal section 2222 is parallel to the pole post connection 210, and the vertical section 2221 and the protrusion 221 are perpendicular to each other.

[0071] In some embodiments, each battery cell 100 has two battery terminals 10, which are spaced apart on the top cover 30; or, the two battery terminals 10 are spaced apart on the housing 20; or, one of the two battery terminals 10 is located on the top cover 30, and the other of the two battery terminals 10 is located on the housing 20.

[0072] Specifically, the two battery terminals 10 have opposite polarities, and one of the two battery terminals 10 is electrically connected to the positive terminal of the battery cell 40, while the other of the two battery terminals 10 is electrically connected to the negative terminal of the battery cell 40.

[0073] It is understandable that the two battery terminals 10 have the same structure.

[0074] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A battery terminal, characterized in that: Includes a pole body (11), the pole body (11) having a receiving cavity (111), the receiving cavity (111) having a first opening (112) formed at the upper end of the pole body (11) along the height direction (a) of the pole body (111), the bottom wall (114) of the receiving cavity (111) for electrical connection with the tab (41) of the battery cell, and the side wall (113) of the receiving cavity (111) having a connection area for electrical connection with the busbar.

2. The battery terminal as described in claim 1, characterized in that: The sidewall (113) of the receiving cavity (111) is inclined inward into the receiving cavity (111), and the width (b) of the bottom wall (114) of the receiving cavity (111) is smaller than the width (c) of the first opening (112).

3. The battery terminal as described in claim 1 or 2, characterized in that: The receiving cavity (111) is provided with a stepped portion (12), and the side wall (113) of the receiving cavity (111) has a first surface (1131) and a second surface (1132). The first surface (1131) faces the interior of the receiving cavity (111), and the second surface (1132) faces away from the interior of the receiving cavity (111). The first surface (1131) protrudes into the interior of the receiving cavity (111) to form the stepped portion (12). Alternatively, the first surface (1131) protrudes into the interior of the receiving cavity (111), and the second surface (1132) is recessed into the interior of the receiving cavity (111) to form the stepped portion (12); The step surface (121) of the step portion (12) is located on the first surface (1131) and is parallel to the bottom wall (114) of the receiving cavity (111), and the connecting area is located on the step surface (121) of the step portion (12).

4. A single battery cell, characterized in that: The device includes a housing (20), a top cover (30), a battery cell (40), and a battery terminal as described in any one of claims 1 to 3. The housing (20) has a cavity, the battery cell (40) is disposed in the cavity, the top cover (30) is disposed in a second opening of the housing (20), the top cover (30) is provided with a through hole (31), the battery terminal (10) passes through the through hole (31), and an insulating seal (50) is provided between the battery terminal (10) and the top cover (30). The tab (41) of the battery cell is electrically connected to the bottom wall (114) of the receiving cavity (111).

5. The battery cell as described in claim 4, characterized in that: The inner wall of the insulating seal (50) is provided with an annular groove (51), and the edge of the first opening (112) at the upper end of the battery terminal (10) is provided with a flange (13), which is in concave-convex fit with the annular groove (51).

6. A battery, characterized in that: The device includes a busbar and multiple battery cells as described in any one of claims 4 to 5. Each battery cell (100) has a battery terminal (10) provided with a conductive connector (200). The conductive connector (200) includes a terminal connection portion (210) and a busbar connection portion (220). The terminal connection portion (210) is disposed in the receiving cavity (111) and is electrically connected to the connection area. One end of the busbar connection portion (220) is connected to the terminal connection portion (210), and the other end of the busbar connection portion (220) extends to the outside of the receiving cavity (111). Each battery cell (100) is electrically connected to the busbar through the busbar connection portion (220).

7. The battery as described in claim 6, characterized in that: The pole connecting part (210) is electrically connected to the step surface (121) of the step part (12) of the receiving cavity (111). The pole connecting part (210) is provided with a hollow (211), and the hollow (211) corresponds to the bottom wall (114) of the receiving cavity (111).

8. The battery as described in claim 7, characterized in that: The distance K between the inner edge of the hollow (211) and the edge of the bottom wall (114) of the receiving cavity (111) satisfies the relationship: 0≤K≤5mm.

9. The battery as described in claim 6, characterized in that: The other end of the busbar connection (220) extends through the insulating seal (50) of the battery cell (100) to the outside of the receiving cavity (111).

10. The battery as claimed in claim 6, characterized in that: The busbar connector (220) is provided with a protrusion (221), which engages with the busbar.

11. An electrical device, characterized in that: It includes the battery as described in any one of claims 6 to 10, or the battery cell as described in any one of claims 4 to 5.

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