Battery pin, battery module and battery pack

Abstract

The application discloses a battery pin, comprising a pin body, the pin body comprising a pole column connecting part and a tab connecting part, the pole column connecting part and the tab connecting part being integrally bent and formed; a structure reinforcing part made of plastic material is sleeved on the outside of the tab connecting part and fixedly connected with the tab connecting part. Meanwhile, a battery module using the battery pin and a battery pack using the battery module are disclosed, so that the problem of poor impact resistance and vibration reduction of the existing pin is solved, thereby effectively ensuring the use performance and safety performance of the power battery.

Description

Technical Field

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

[0002] Currently, the pins of the secondary power battery top cover are ultrasonically welded with positive and negative tabs, allowing the current in the cell to flow from the inside to the outside. However, in actual applications, power batteries inevitably encounter vibration and impact issues. The current pins have poor impact resistance and vibration damping capabilities, making them prone to deformation or breakage during vibration and impact, thus affecting the battery's performance and safety. Summary of the Invention

[0003] In order to overcome at least one of the defects described in the prior art, the present invention provides a battery pin, a battery module, and a battery pack, which solves the problem of poor impact resistance and vibration reduction capability of existing pins, thereby effectively ensuring the performance and safety of the power battery.

[0004] The technical solution adopted by this invention to solve its problem is:

[0005] A battery pin, comprising:

[0006] The pin body includes a terminal post connection portion and a terminal tab connection portion, wherein the terminal post connection portion and the terminal tab connection portion are integrally bent into shape;

[0007] A structural reinforcement component made of plastic is sleeved on the outside of the electrode tab connection portion and fixedly connected to the electrode tab connection portion.

[0008] Furthermore, the structural reinforcement includes a fixed arm and a reinforcement seat. The reinforcement seat has a pin guide groove inside. The fixed arm is disposed in the pin guide groove, and a pin connection area is formed between the fixed arm and the two opposite groove walls of the pin guide groove. The pin connection area is used to electrically connect the battery tab to the tab connection part.

[0009] Furthermore, a reinforcing part is provided on the side wall of the pin guide groove. The reinforcing part extends from the fixing arm along the groove length direction of the pin guide groove and abuts against the tab connection part.

[0010] Furthermore, a positioning area is provided on the electrode connecting part, and a positioning part is provided on the fixing arm, the positioning part being located inside the positioning area.

[0011] Furthermore, the tab connection portion is provided with a circuit protection port, so that a fusible protection portion is formed between the side of the tab connection portion and the edge of the circuit protection port. The fixing arm is provided with a fixing portion, which is located inside the circuit protection port.

[0012] Furthermore, the outer periphery of the structural reinforcement is provided with a rounded structure, the rounding radius of the rounding structure is R, and the range of the rounding radius R is [0.2, 1.5].

[0013] Furthermore, the dimension of the structural reinforcement in the first direction is defined as the structural thickness T, and the range of the structural thickness T is [0.2, 1]. The first direction is the thickness direction of the tab connection.

[0014] Furthermore, the reinforcing part is provided with a guide surface, which is located inside the pin connection area and extends obliquely toward the inner bottom wall of the pin guide groove in the direction from the outside of the pin guide groove to its inside.

[0015] Furthermore, the structural reinforcement is an insulating and flame-retardant component.

[0016] This invention also discloses a battery module, comprising:

[0017] Several battery cells;

[0018] The aforementioned battery pin is mounted and fixed to the battery cell. The terminal connection portion of the battery pin is connected to the battery terminal of the battery cell, and the tab connection portion of the battery pin is connected to the battery tab of the battery cell. The structural reinforcement of the battery pin abuts against the insulating film of the battery cell.

[0019] Furthermore, the battery tab includes a first tab and a second tab, the first tab and the second tab being disposed opposite to each other, and an adjustment gap being provided between the first tab and the second tab.

[0020] Furthermore, the first electrode tab is bent to form a first contact segment, and the second electrode tab is formed to form a second contact segment. Both the first contact segment and the second contact segment abut against the electrode tab connection portion.

[0021] The present invention also discloses a battery pack, including the aforementioned battery module.

[0022] In summary, the battery pins, battery module, and battery pack provided by this invention have the following technical advantages:

[0023] By combining structural reinforcement components with the pin body, a plastic protective layer can be formed on the outside of the tab connection part of the pin body. By utilizing the elasticity and mechanical strength of the plastic, the impact resistance and vibration damping capabilities of the pin body are improved, effectively avoiding the risk of deformation or breakage of the pin body during vibration and impact.

[0024] Even more unexpectedly, the structural reinforcement also improves the insulation and heat insulation performance between the cell and the lead body, and increases the cross-sectional area of ​​the lead body, thereby increasing the structural strength of the lead body and greatly improving the performance and safety of the power battery. Attached Figure Description

[0025] Figure 1 This is an overall structural diagram of a battery pin according to the present invention;

[0026] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0027] Figure 3 This is a schematic diagram of the structural reinforcement component in this invention;

[0028] Figure 4 This is a first structural diagram of the pin body in this invention;

[0029] Figure 5 This is a second structural diagram of the pin body in this invention;

[0030] Figure 6 This is an overall structural diagram of a battery module according to the present invention;

[0031] Figure 7 for Figure 6 A magnified view of a portion of point B in the middle;

[0032] Figure 8 for Figure 3 A magnified view of a portion of point C.

[0033] Icons: 11-Pin body, 111-Terminal connection, 112-Tail connection, 113-Terminal connection port, 114-Fuse protection part, 12-Structural reinforcement, 121-Fixing arm, 122-Reinforcement seat, 123-Pin guide groove, 124-Reinforcement part, 125-Guiding surface, 131-Positioning area, 132-Positioning part, 14-Circuit protection port, 15-Rounded structure, 21-Battery terminal, 22-Battery top cover, 23-First tab, 231-First transition section, 232-First contact section, 24-Second tab, 241-Second transition section, 242-Second contact section, 25-Cell. Detailed Implementation

[0034] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0035] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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 limitations on this invention.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0037] First Embodiment

[0038] Please refer to the specific details. Figure 1 , Figure 4 and Figure 5 As shown, where, Figure 1 The diagram shows the detailed structure of the pin body 11 and the structural reinforcement 12 being fixedly connected, with the structural reinforcement 12 shown in a half-section. This invention discloses a battery pin, comprising:

[0039] The pin body 11 includes a terminal connection portion 111 and a tab connection portion 112, wherein the terminal connection portion 111 and the tab connection portion 112 are integrally bent into shape.

[0040] Structural reinforcement 12 is sleeved on the outside of the tab connection portion 112 and fixedly connected to the tab connection portion 112. Structural reinforcement 12 is used to enhance the structural strength and impact resistance of the pin body 11.

[0041] In this embodiment, the terminal connection portion 111 is used to electrically connect to the battery terminal 21, and the tab connection portion 112 is used to electrically connect to the battery tab. Specifically, the terminal connection portion 111 is provided with a terminal connection port 113 that engages with the battery terminal 21, and the shape and size of the terminal connection port 113 are adapted to the battery terminal 21, so that the inner sidewall of the terminal connection port 113 contacts the periphery of the battery terminal 21. In this way, the installation between the lead body 11 and the battery terminal 21 is more stable. At this time, the current of the cell 25 flows from the battery tab to the tab connection portion 112 of the lead body 11, then from the tab connection portion 112 of the lead body 11 to the terminal connection portion 111 of the lead body 11, and finally flows to the battery terminal 21.

[0042] The electrode connector 111 and the tab connector 112 are formed by bending, which avoids welding defects left over from the welding process, ensures the aesthetic appearance of the pin body 11, and makes processing easier and faster. At the same time, it also effectively enhances the structural strength of the pin body 11.

[0043] It should be noted that the structural reinforcement 12 is preferably made of plastic, but rubber can also be used. The structural reinforcement 12 is encapsulated in the tab connection portion 112 of the lead body 11 through injection molding. On the one hand, the battery lead is in close contact with the cell 25, which can enhance the insulation performance between the lead body 11 and the cell 25, forming a double insulation effect in conjunction with the insulating film of the cell 25. On the other hand, by utilizing the elastic deformation performance of the structural reinforcement 12, when the cell 25 is under actual working conditions, it can eliminate the risk of vibration and impact between the lead body 11 and the cell 25, that is, improve the impact resistance and vibration reduction effect of the lead body 11, and also avoid the problem of the battery tabs connected to the tab connection portion 112 being prone to breakage, thus ensuring the safe use of the cell 25.

[0044] Unexpectedly, the structural reinforcement 12 is sleeved on the outside of the pin body 11, which can increase the thickness of the tab connection portion 112, that is, increase the cross-sectional area of ​​the tab connection portion 112 along the cross-sectional direction of the tab connection portion 112, thereby increasing the structural strength of the pin body 11.

[0045] Furthermore, in specific combinations Figure 1 and Figure 3 As shown, the structural reinforcement 12 includes a reinforcement seat 122. The reinforcement seat 122 has a lead guide groove 123 inside. The lead guide groove 123 extends through both sides of the reinforcement seat 122 along the groove length direction A, and the width of the lead guide groove 123 is adapted to the width of the tab connection portion 112. Thus, the reinforcement seat 122 is fitted over the outside of the tab connection portion 112, that is, the reinforcement seat 122 covers the three sides of the lead body 11, preventing loosening or wobbling between the reinforcement seat 122 and the tab connection portion 112 along the groove width direction B of the lead guide groove 123, achieving a stable connection between the tab connection portion 112 and the structural reinforcement 12. Of course, the groove width of the lead guide groove 123 can also be greater than the width of the tab connection portion 112 within the assembly tolerance range.

[0046] Specifically, the direction perpendicular to the bottom of the pin guide groove 123 is defined as the groove depth direction H of the pin guide groove 123. To prevent the tab connection part 112 from detaching from the reinforcement seat 122 from the groove depth direction H of the pin guide groove 123, it is specifically combined with... Figure 1 and Figure 3As shown, the structural reinforcement 12 also includes a fixing arm 121. The fixing arm 121 is disposed in the lead guide groove 123, thereby constraining the tab connection portion 112 inside the lead guide groove 123. Preferably, the distance between the fixing arm 121 and the lead guide groove 123 is adapted to the thickness of the tab connection portion 112, so that the fixing arm 121 can abut against the surface of the tab connection portion 112. This avoids the phenomenon of loosening and shaking between the reinforcement seat 122 and the tab connection portion 112 in the groove depth direction H of the lead guide groove 123, making the assembly between the structural reinforcement 12 and the lead body 11 more compact.

[0047] However, it should be noted that the distance between the fixed arm 121 and the lead guide groove 123 is not limited to being adapted to the thickness of the tab connection portion 112, but can also be greater than the width of the tab connection portion 112 within the assembly tolerance range.

[0048] It should be added that the battery tab can be connected to the first end of the tab connection portion 112, wherein the first end is the end of the tab connection portion 112 away from the terminal post connection portion 111, so as to achieve the purpose of electrically connecting the tab connection portion 112 with the battery tab.

[0049] In addition to the above, as a preferred embodiment, the following is specifically combined with... Figure 3 As shown, a pin connection area is formed between the two opposite groove walls of the fixed arm 121 and the pin guide groove 123. That is, the area enclosed by the two groove walls of the pin guide groove 123 and the fixed arm 121 is the pin connection area. The interior of the pin guide groove 123 is connected to the exterior of the pin guide groove 123 through the pin connection area, thereby achieving the effect that the battery tab can be electrically connected to the tab connection part 112 under the action of the pin connection area.

[0050] More importantly, this design allows for a larger contact area between the battery tab and the pin body 11 located inside the structural reinforcement 12. This facilitates the connection between the battery tab and the pin body 11 and ensures a secure and stable connection during use, thereby promoting stable current delivery between them. Furthermore, it prevents the first end of the tab connection 112 from shifting away from the pin guide groove 123, specifically avoiding the problem of the first end of the tab connection deviating from the outside of the pin guide groove 123.

[0051] Please refer to the specific details. Figure 1 and Figure 3As shown, a reinforcing part 124 is provided on the side wall of the slot. The reinforcing part 124 extends from the fixing arm 121 along the length of the lead guide slot 123. To ensure the uniformity of force on the tab connection part 112, a reinforcing part 124 is provided on both opposite side walls of the guide slot. Each reinforcing part 124 can abut against the tab connection part 112, but it is not limited to two reinforcing parts 124; the number of reinforcing parts 124 can also be one. In this way, with the cooperation of the fixing arm 121 and the reinforcing part 124, it is ensured that every position of the tab connection part 112 is embedded inside the lead guide slot 123. At the same time, it further improves the uniformity of force between the structural reinforcement 12 and the tab connection part 112, making the assembly between the structural reinforcement 12 and the lead body 11 more compact.

[0052] It should be noted that the reinforcing part 124 extends towards the width direction B of the pin guide groove 123, that is, the reinforcing part 124 extends towards the inner side of the pin guide groove 123. The width of the reinforcing part 124 is set and adjusted according to the structural design requirements or design needs, and is not specifically limited here, so that the reinforcing part 124 can have a sufficient area to act on the tab connection part 112, ensuring that the structural reinforcement 12 and the pin body 11 are tightly assembled.

[0053] As a preferred embodiment, to avoid loosening and relative sliding between the aforementioned tab connection 112 and the structural reinforcement 12, please refer to the following for details. Figure 1 , Figure 2 and Figure 4 As shown, a positioning area 131 is provided on the tab connection portion 112, and a positioning portion 132 is provided on the fixing arm 121. The positioning portion 132 is located inside the positioning area 131. The assembly and cooperation between the positioning portion 132 and the positioning area 131 is used to constrain the sliding of the tab connection portion 112 in the groove length direction A and / or groove width direction B of the lead guide groove 123.

[0054] Specifically, the positioning area 131 is a through hole, preferably a circular through hole, but it can also be a square through hole, an oblong hole, an elliptical hole, or a through hole of other shapes. The shape and size of the positioning part 132 are preferably adapted to the shape and size of the positioning area 131, so that the sidewall of the positioning part 132 can fully contact the periphery of the positioning area 131.

[0055] Preferably, both ends of the positioning part 132 are fixedly connected to the structural reinforcement 12. That is, one end of the positioning part 132 is fixedly connected to the fixing arm 121, and the other end passes through the positioning area 131 and is fixedly connected to the reinforcement seat 122. Alternatively, the positioning part 132 may be fixedly connected to the fixing arm 121 at only one end, and the positioning part 132 may extend into the interior of the positioning area 131 along the central axis direction. It may either pass through the positioning area 131 or be located inside the positioning area 131 without passing through it.

[0056] This effectively ensures the secure assembly between the pin body 11 and the structural reinforcement 12, eliminating the potential risk of the pin body 11 easily detaching from the structural reinforcement 12 under external force. Simultaneously, the positioning part 132 and the fixing arm 121 can be integrally molded to achieve a fixed connection. That is, during production, the positioning part 132 can be injection molded into the positioning area 131. Compared to the structural reinforcement 12, which uses a plug-in assembly method and interference fit to prevent loosening, this simplifies the battery pin manufacturing process and reduces manufacturing difficulty.

[0057] What's even more ingenious is that, based on specific circumstances... Figure 5 As shown, a circuit protection port 14 is provided on the tab connection portion 112, so that a fuse protection portion 114 is formed between the side of the tab connection portion 112 and the edge of the circuit protection port 14. Preferably, the circuit protection port 14 is symmetrically arranged about the center line of the tab connection portion 112, so that the minimum cross-section of the fuse protection portion 114 on both opposite sides of the circuit protection port 14 is equal.

[0058] Specifically, the circuit protection port 14 is a through groove, the shape of which is not limited and can be either oblong or square. The length of the circuit protection port 14 extends parallel to the width direction B of the lead guide groove 123, so that the minimum cross-section of the fuse protection part 114 formed between the circuit protection port 14 and the tab connection part 112 can meet the requirement of self-melting under high current. Therefore, when the battery is short-circuited, or when the current flowing through the lead body 11 is too large, the battery is at risk of short circuit. Under the action of high current, the fuse protection part will abnormally heat up to a certain temperature and melt and break at the position of the minimum cross-section, thereby achieving the purpose of quickly cutting off the current flow, achieving the effect of overload protection, and eliminating the risk of battery short circuit.

[0059] Furthermore, a fixing part is provided on the fixing arm 121, and the fixing part is located inside the circuit protection port 14. The shape and size of the circuit protection port 14 are preferably adapted to the shape and size of the fixing part, so that the side wall of the fixing part can fully contact the periphery of the circuit protection port 14.

[0060] One end of the fixing part is fixedly connected to the fixing arm 121, and the other end passes through the circuit protection port 14 and is fixedly connected to the reinforcing seat 122. Alternatively, the fixing part can be fixedly connected to the fixing arm 121 at only one end, and the fixing part can be inserted and extended into the interior of the circuit protection port 14 along the central axis direction. It can either pass through the circuit protection port 14 or be located inside the circuit protection port 14 without passing through it. It should be noted that the fixing part and the fixing arm 121 can be integrally molded to achieve the purpose of the fixing part being set on the fixing arm 121, that is, during the production process, the fixing part can be injection molded into the circuit protection port 14 to form the fixing part.

[0061] In this way, the fixing part can replace the positioning part 132 to constrain the sliding of the tab connection part 112 in the groove length direction A and / or groove width direction B of the pin guide groove 123, ensuring the firmness of the assembly between the pin body 11 and the structural reinforcement 12.

[0062] Unexpectedly, by utilizing the linkage between the fixing part, the fixing arm 121 and the reinforcing seat 122, the tab connection part 112 can be detached from the structural reinforcement part 12 when the fuse protection part 114 melts, which greatly improves the safety of the battery pack during use.

[0063] Preferably, the structural reinforcement 12 is an insulating and flame-retardant component. That is, the structural reinforcement 12 is made of flame-retardant material, which utilizes the properties of flame-retardant material to inhibit or delay combustion, thus preventing the structural reinforcement 12 from burning and causing a fire when the battery short-circuits.

[0064] As one of the preferred solutions in this embodiment, specifically combined with Figure 8 As shown, the outer periphery of the structural reinforcement 12 is provided with a rounded structure 15, the rounding radius of the rounded structure 15 is R, and the range of the rounding radius R is [0.2, 1.5]. Preferably, the rounding radius R is 0.3.

[0065] By utilizing the rounded structure 15, not only is the concentrated stress at the sharp locations on the outer surface of the structural reinforcement 12 eliminated, but the aesthetics of the battery pin outer surface are also improved. At the same time, it also avoids the problem of scratches and wear on battery components (such as the cell 25, tabs, etc.) caused by the sharp locations of the structural reinforcement 12.

[0066] When the rounding radius R of the rounded structure 15 is less than 0.2, it will greatly increase the difficulty of forming the rounded structure 15 in the structural reinforcement 12, and may even lead to the problem that the rounded structure 15 cannot be formed. When the rounding radius R of the rounded structure 15 is greater than 1.5, the rounding radius is too large, which also leads to the problem that the rounded structure 15 cannot be formed. Therefore, the range of the rounding radius R within [0.2, 1.5] can effectively ensure the formation of the rounded structure 15 in the structural reinforcement 12.

[0067] As one of the preferred solutions in this embodiment, please refer to the following for details. Figure 3 and Figure 5 As shown, the dimension of the structural reinforcement 12 in the first direction is defined as the structural thickness T, and the range of the structural thickness T is...

[0068] [0.2, 1], the first direction is the thickness direction of the tab connection 112, and preferably, the structural thickness T is 0.5.

[0069] When the structural thickness T is less than 0.2, the injection flow resistance of the structural reinforcement 12 increases significantly during injection molding, making it difficult to fill the entire cavity. Conversely, when the structural thickness T is greater than 1, the wall thickness of the structural reinforcement 12 becomes too large, resulting in excessively large battery pins and thus occupying too much internal space in the battery pack, reducing its utilization rate. Therefore, a structural thickness T within the range of [0.2, 1] not only ensures the manufacturing quality of the structural reinforcement 12 but also effectively avoids the problem of excessive internal space occupation after the battery pins are assembled into the battery pack.

[0070] It should be noted that within the range of the rounding radius R and the range of the structural thickness T, the larger the value of the structural thickness T, the wider the range of the rounding radius R.

[0071] For further details, please refer to [the relevant documentation / reference]. Figure 1 and Figure 3 As shown, the reinforcing part 124 is provided with a guide surface 125, which is located inside the pin connection area. In the direction from the outside of the pin guide groove 123 to its inside, the guide surface 125 extends obliquely toward the inner bottom wall of the pin guide groove 123.

[0072] Second Embodiment

[0073] Based on the battery pin disclosed in the first embodiment, the inventors also disclosed a battery module, which can be found in conjunction with [the specific details]. Figure 6 and Figure 7 As shown, where, Figure 6 To more clearly illustrate the assembly relationship between the battery terminal 21 and the terminal connection portion 111 of the lead body 11, a partial cross-sectional view of the battery top cover 22 is provided. This invention discloses a battery module, comprising:

[0074] Several battery cells 25;

[0075] The aforementioned battery pins are mounted and fixed to the battery cell 25. The terminal connection portion 111 of the battery pins is connected to the battery terminal 21 of the battery cell 25, and the tab connection portion 112 of the battery pins is connected to the battery tab of the battery cell 25. The structural reinforcement member 12 of the battery pins abuts against the insulating film of the battery cell 25.

[0076] In this embodiment, when the battery pins are assembled onto the battery cell 25, the pin connection area of ​​the battery pins is arranged parallel to the surface of the battery cell 25, and the bottom surface of the reinforcing seat 122 of the structural reinforcement 12 abuts against the insulating film surface of the battery cell 25. Therefore, the structural reinforcement 12 is spaced between the battery cell 25 and the pin body 11 of the battery pins. Consequently, the pin body 11 and the battery cell 25 have better insulation performance, impact resistance, and vibration reduction. Since the pin body 11 generates a certain amount of heat when transmitting current, the heat generated by the pin body 11 will not be transferred to the battery cell 25 in large quantities due to the obstruction of the structural reinforcement 12, thus achieving the effect of protecting the stable use and safe operation of the battery cell 25.

[0077] If the battery tabs are too long during the bending process, excess parts of the tabs will be squeezed and move / shift towards the cell 25 side. This is called reverse insertion of the tabs. Reverse insertion of the tabs will not only damage the cell 25 electrode, but also cause a short circuit due to contact between electrodes of different polarities.

[0078] For specific details, please refer to [the relevant documentation / reference]. Figure 6 and Figure 7 As shown, the battery tabs include a first tab 23 and a second tab 24, which are arranged opposite to each other, and an adjustment gap is provided between the first tab 23 and the second tab 24.

[0079] In this way, if there is an error in the length of the battery tabs, the excess part generated during the bending process of the battery tabs can be compensated by adjusting the gap, thus providing sufficient space for length adjustment of the battery tabs and effectively avoiding the problem of tabs being inserted backwards.

[0080] In this embodiment, please refer to the following for details. Figure 6 and Figure 7 As shown, the first tab 23 is bent to form a first contact section 232, and the second tab 24 is formed to form a second contact section 242. Both the first contact section 232 and the second contact section 242 abut against the tab connection portion 112.

[0081] The first electrode tab 23 further includes a first transition section 231, which extends from the outside of the reinforcing seat 122, around the reinforcing portion 124, and along the extending direction of the guide surface 125. The first transition section 231 is integrally formed with the first contact section 232, which is in surface contact with and abuts against the electrode tab connecting portion 112. Similarly, the second electrode tab 24 further includes a second transition section 241, which extends from the outside of the other side of the reinforcing seat 122, around another reinforcing portion 124, and along the extending direction of the guide surface 125. The second transition section 241 is integrally formed with the second contact section 242, which is in surface contact with and abuts against the electrode tab connecting portion 112.

[0082] In this way, the sharp part of the reinforcing part 124 can be effectively prevented from scratching the first transition section 231 or the second transition section 241. At the same time, under the guidance of the guiding surface 125, the first electrode 23 and the second electrode 24 can be bent and contact the electrode connecting part 112 better.

[0083] Even more unexpectedly, the pin connection area of ​​the structural reinforcement 12 provides more area for the tab connection portion 112 of the pin body 11 to contact the first contact segment 232 and the second contact segment 242, ensuring that the force between the tab connection portion 112 and the first contact segment 232 and between the second contact segment 242 and the tab connection portion 112 is more uniform. Under the abutting action of the first contact segment 232 and the second contact segment 242, the battery pins are more stably abutted against the cell 25, thereby making the assembly between the battery pins and the cell 25 more compact and firm.

[0084] Of course, the first contact section 232 and the electrode connecting part 112 can also be welded together, and the second contact section 242 and the electrode connecting part 112 can also be welded together, thereby avoiding the problem of poor contact between the first contact section 232 and the electrode connecting part 112 or between the second contact section 242 and the electrode connecting part 112 under the deformation of the first transition section 231 and the second transition section 241.

[0085] It should be added that the battery terminals 21 include a positive terminal and a negative terminal. The battery pin connected to the positive terminal is defined as the positive terminal pin, and the battery pin connected to the negative terminal pin is defined as the negative terminal pin. The positive terminal pin has a fuse protection part inside, and the negative terminal pin has a positioning part 132 inside. In this way, the fuse is designed on the positive current collector. When the battery is overcharged, the pressure generated inside the battery causes the OSD to trigger an internal short circuit, generating a large instantaneous current. This allows the fuse protection part to melt quickly, thus cutting off the current circuit inside the battery.

[0086] Third Embodiment

[0087] Based on the battery pack disclosed in the second embodiment, the inventors also disclosed a battery pack that includes the aforementioned battery module.

[0088] This results in a more compact internal structure and a smaller overall size for the battery pack. Furthermore, the battery pins within the pack effectively ensure stable current transmission, guaranteeing stable and safe operation. It also ensures the stable operation of devices using this battery pack.

[0089] Electrical devices can be used for energy storage power systems such as hydropower, thermal power, wind power and solar power plants, as well as electric vehicles such as electric bicycles, electric motorcycles and electric cars, and industrial equipment such as electric drills, electric wrenches and electric bolt cutters.

[0090] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A battery pin, characterized in that, include: The pin body (11) includes a pole post connection part (111) and a tab connection part (112), wherein the pole post connection part (111) and the tab connection part (112) are integrally bent into shape; A structural reinforcement member (12) made of plastic material is sleeved on the outside of the electrode connecting part (112) and fixedly connected to the electrode connecting part (112); The structural reinforcement (12) includes a reinforcement seat (122), and the reinforcement seat (122) has a lead guide groove (123) inside. The lead guide groove (123) extends through both sides of the reinforcement seat (122) along the length of the groove, so that the lead guide groove (123) has a bottom wall and opposite side walls. The reinforcement seat (122) is open on the side opposite to the bottom wall of the lead guide groove (123). The reinforcement seat (122) is used to contact the insulating film surface of the battery cell (25). The structural reinforcement (12) includes a fixing arm (121), which is disposed in the pin guide groove (123) and connected to the opposite side walls of the pin guide groove (123). The fixing arm (121) has a distance from the bottom wall of the pin guide groove (123). The dimension of the fixed arm (121) along the groove length direction is smaller than the dimension of the reinforcing seat (122) along the groove length direction, and the fixed arm (121) and the two opposite side walls of the pin guide groove (123) located on one side of the fixed arm (121) along the groove length direction form a pin connection area, which is used to electrically connect the battery tab to the tab connection part (112).

2. The battery pin according to claim 1, characterized in that: A reinforcing part (124) is provided on the side wall of the pin guide groove (123). The reinforcing part (124) extends from the fixing arm (121) along the groove length direction of the pin guide groove (123) and abuts against the tab connection part (112).

3. The battery pin according to claim 1 or 2, characterized in that: The electrode connecting part (112) is provided with a positioning area (131), and the fixing arm (121) is provided with a positioning part (132), the positioning part (132) being located inside the positioning area (131).

4. The battery pin according to claim 1 or 2, characterized in that: The tab connection part (112) is provided with a circuit protection port (14), so that a fuse protection part (114) is formed between the side of the tab connection part (112) and the edge of the circuit protection port (14). The fixing arm (121) is provided with a fixing part, which is located inside the circuit protection port (14).

5. The battery pin according to claim 1, characterized in that: The outer periphery of the structural reinforcement (12) is provided with a rounded structure (15), the rounded radius of the rounded structure (15) is R, and the range of the rounded radius R is [0.2, 1.5].

6. The battery pin according to claim 1 or 5, characterized in that: The dimension of the structural reinforcement (12) in the first direction is defined as the structural thickness T, and the range of the structural thickness T is [0.2, 1]. The first direction is the thickness direction of the tab connection (112).

7. The battery pin according to claim 2, characterized in that: The reinforcing part (124) is provided with a guide surface (125), which is located inside the pin connection area and extends obliquely toward the inner bottom wall of the pin guide groove (123) in the direction from the outside of the pin guide groove (123) to its inside.

8. The battery pin according to claim 1, 2, or 7, characterized in that: The structural reinforcement (12) is an insulating and flame-retardant component.

9. A battery module, characterized in that, include: Several battery cells (25); The battery pin according to any one of claims 1 to 8, wherein the battery pin is mounted and fixed to the battery cell (25), the terminal connection portion (111) of the battery pin is connected to the battery terminal (21) of the battery cell (25), the tab connection portion (112) of the battery pin is connected to the battery tab of the battery cell (25), and the structural reinforcement member (12) of the battery pin abuts against the insulating film of the battery cell (25).

10. The battery module according to claim 9, characterized in that: The battery tabs include a first tab (23) and a second tab (24), the first tab (23) and the second tab (24) are arranged opposite to each other, and an adjustment gap is provided between the first tab (23) and the second tab (24).

11. A battery module according to claim 10, characterized in that: The first tab (23) is bent to form a first contact segment (232), and the second tab (24) is formed to form a second contact segment (242). Both the first contact segment (232) and the second contact segment (242) abut against the tab connection portion (112).

12. A battery pack, characterized in that: Includes a battery module as described in any one of claims 9 to 11.

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