Battery pin and battery

Abstract

The utility model provides a battery pin and a battery, the battery pin comprises a tab connecting part, the tab connecting part comprises a main plate, a bending plate and a connecting plate which are connected with each other, the main plate is connected to one side of the bending plate, the connecting plate is connected to the other side of the bending plate in a bending manner, and the connecting plate is used for connecting a tab of the battery; the at least two communicated grooves are formed in the side, far away from the tab, of the connecting plate, the grooves are located in the end, close to the connecting plate, of the bending plate, and the minimum opening size of the grooves far away from the tab is larger than the maximum opening size of the grooves close to the tab, so that stress can be effectively dispersed in the bending process of the bending plate, and the bending quality of the battery is improved. The stress is prevented from being concentrated at a certain point, the gradual transition design is achieved, and then the cracking risk of the thinnest position of the bent plate material is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery pin and battery. BACKGROUND

[0002] Lithium ion battery is a kind of rechargeable battery, with high energy density, long cycle life and other advantages, is widely used in portable electronic equipment and electric vehicle, in actuality, several core packs are often parallelly connected to single cell according to the use needs, therefore need to use "battery pin" to connect the tab of each core pack to the pole of single cell, so that single cell has unified external electrode, which can improve the load capacity of core pack, and can facilitate the assembly of core pack.

[0003] The battery pin includes a tab connecting portion and a pole connecting portion, one end of the tab connecting portion is connected to the tab of the cell, and one end of the pole connecting portion is connected to the pole of the battery cover plate. A bending plate is usually designed on the tab connecting portion. A notch groove is provided at the bending position of the bending plate to allow the bending plate to contact the tab at an appropriate angle. However, in the related art, the geometric design of the notch groove can cause stress concentration. In particular, at the corner of the notch groove, when the bending plate is bent, these stress concentration areas are prone to cause cracking of the bending plate. SUMMARY

[0004] Embodiments of the utility model provide a battery pin and a battery to solve or at least partially solve the deficiencies in the background art.

[0005] In a first aspect, embodiments of the utility model provide a battery pin, comprising:

[0006] The tab connecting portion includes a main plate, a bending plate and a connecting plate connected together. The main plate is connected to one side of the bending plate. The connecting plate is bendably connected to the other side of the bending plate. The connecting plate is used to connect the tab of the battery.

[0007] The connecting plate has at least two recesses connected together on the side away from the tab. The recesses are located at one end of the bending plate close to the connecting plate. The minimum opening size of the recess away from the tab is greater than the maximum opening size of the recess close to the tab.

[0008] In an embodiment, the at least two recesses include a first recess and a second recess connected together. The second recess is located on the side of the first recess away from the tab.

[0009] The second recess covers the first recess on the connecting plate.

[0010] In an embodiment, the first recess comprises a first bottom surface and a first sidewall, the first sidewall is arranged around the first bottom surface to form a first opening opposite to the first bottom surface, and a size of the first opening is greater than a size of the first bottom surface.

[0011] The second recess comprises a second bottom surface and a second sidewall, the second sidewall is arranged around the second bottom surface to form a second opening opposite to the second bottom surface, and a size of the second opening is greater than a size of the second bottom surface; and the first opening is arranged on the second bottom surface.

[0012] In an embodiment, the first sidewall is arranged to be inclined relative to the first bottom surface, and an inclination angle between the first sidewall and the first bottom surface is greater than or equal to 120 degrees and less than or equal to 150 degrees.

[0013] The second sidewall is arranged to be inclined relative to the second bottom surface, and an inclination angle between the second sidewall and the second bottom surface is greater than or equal to 120 degrees and less than or equal to 150 degrees.

[0014] In an embodiment, the size of the first opening is L1, the size of the first bottom surface is L2, the size of the second opening is L3, and the size of the second bottom surface is L4; and L3>L4>L2>L1.

[0015] In an embodiment, the thickness of the main plate is L5, and 2L5≥L2≥0.2L5.

[0016] In an embodiment, the depth of the first recess is H1, and the depth of the second recess is H2; and 3 / 4L≥H1+H2≥1 / 4L5; and / or

[0017] The depth of the first recess is H1, and the depth of the second recess is H2; and 1.5≥H1 / H2≥0.5.

[0018] In an embodiment, the cross section of the bending plate comprises an arc segment and a straight line segment connected to each other, the arc segment is arranged close to the main plate and connected, and the straight line segment is arranged close to the connecting plate and connected.

[0019] The connection between the arc segment and the straight line segment is provided with a pre-pressing line, and the orthographic projection of the pre-pressing line on the bending plate is located in the recess.

[0020] In an embodiment, the battery pin further comprises a top cover connecting portion for connecting a pole of a top plate, the top cover connecting portion is connected to one end of the main plate; and

[0021] The top cover connecting portion, the main plate, the connecting plate and the bending plate are integrally formed; and / or,

[0022] The top cover connecting portion comprises a fixing hole, and the pole post is fixedly connected with the pole post connecting portion through the fixing hole; and / or,

[0023] The top cover connecting portion comprises a fuse slot, and a long axis of the fuse slot is parallel to the junction line of the top cover connecting portion and the main plate.

[0024] In a second aspect, the embodiments of the utility model provide a battery, which comprises the battery pin of any one of the above embodiments.

[0025] The utility model discloses embodiments have the advantages that:

[0026] The utility model discloses embodiments provide a battery pin and battery, and the battery pin includes a pole lug connecting portion, the pole lug connecting portion includes the main plate, the bending plate and the connecting plate that are connected, the main plate is connected to one side of the bending plate, and the connecting plate is foldably connected to the other side of the bending plate, and the connecting plate is used for connecting the pole lug of the battery, at least two recesses that are communicated are arranged on the side of the connecting plate away from the pole lug, the recess is located at the end of the bending plate close to the connecting plate, and the minimum opening size of the recess away from the pole lug is greater than the maximum opening size of the recess close to the pole lug, so that in the process of bending the bending plate, stress can be effectively dispersed, stress concentration in a certain point is avoided, gradual transition design is realized, and the cracking risk of the thinnest part of the bending plate material is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating creative labor.

[0028] Figure 1 The structure schematic diagram of the battery provided by the embodiments of the utility model is shown in the drawings.

[0029] Figure 2 The structure schematic diagram of the folding state of the battery pin provided by the embodiments of the utility model is shown in the drawings.

[0030] Figure 3 The structure schematic diagram of the unfolded state of the battery pin provided by the embodiments of the utility model is shown in the drawings.

[0031] Figure 4 The top view of the battery pin provided by the embodiments of the utility model in the unfolded state is shown in the drawings.

[0032] Figure 5The utility model provides an embodiment of the utility model provides Figure 4 The enlarged view at A in the figure.

[0033] Figure 6 The utility model provides an embodiment of the utility model provides the structure schematic view of the bent plate.

[0034] Mark explanation:

[0035] 1 - battery pack, 11 - battery cell, 12 - top cover, 13 - battery pin

[0036] 111 - tab, 121 - pole, 131 - top cover connecting portion, 132 - tab connecting portion

[0037] 1311 - fixing hole, 1312 - fuse slot

[0038] 1321 - main plate, 1322 - bent plate, 1323 - connecting plate

[0039] 13220 - groove, 13221 - first groove, 13222 - second groove, 13223 - pre-pressing line, 13224 - arc segment, 13225 - straight line segment

[0040] 132211 - first bottom surface, 132212 - first side wall, 132213 - first opening

[0041] 132221 - second bottom surface, 132222 - second side wall, 132223 - second opening DETAILED DESCRIPTION

[0042] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the range of protection of the utility model. In addition, it should be understood that the specific embodiments described here are only used for illustrating and explaining the utility model, and are not used for limiting the utility model. In the utility model, the orientation words such as "up" and "down" are generally used for the up and down of the device actual use or working state, and the specific is the direction of the drawing in the drawing, and "inner" and "outer" are used for the contour of the device.

[0043] Please combine Figure 1 And Figure 2 ; wherein, Figure 1 The utility model provides an embodiment of the utility model provides the structure schematic view of the battery Figure 2The structure schematic diagram of the folded state of the battery pin is provided for the embodiment of the utility model.

[0044] In an embodiment, the battery pack 1 comprises a battery cell 11, a top cover 12 and a battery pin 13; the battery cell 11 is used for storing and releasing electric energy, the battery cell 11 comprises a tab 111, the tab 111 can be located at the top of the battery cell 11, the tab 111 is the external contact part of the battery cell positive electrode and the battery cell negative electrode, and is used for transmitting electric energy to the external circuit; the top cover 12 is part of the battery shell, the top cover 12 can be located at the top of the battery cell 11, and the top cover 12 comprises a pole 121; the battery pin 13 is used for connecting the tab 111 of the battery cell 11 and the pole 121 of the top cover 12, and the pole 121 can be connected with the battery cell 11 through the battery pin 13, so that the energy of the battery cell 11 can be effectively output.

[0045] The battery pin 13 comprises a top cover connecting portion 131 and a tab connecting portion 132, the top cover connecting portion 131 is used for connecting the pole 121 of the top cover 12, the tab connecting portion 132 comprises a main plate 1321, at least one bending plate 1322 and at least one connecting plate 1323, the main plate 1321 is connected to one side of the bending plate 1322, and the connecting plate 1323 is bendably connected to the other side of the bending plate 1322; the connecting plate 1323 is used for connecting the tab 111 of the battery cell 11.

[0046] Specifically, the top cover connecting portion 131 extends along a first direction X, the main plate 1321 extends along a second direction Y, one end of the top cover connecting portion 131 is connected with the main plate 1321, and the second direction Y is at a first preset angle with the first direction X; the tab connecting portion 132 comprises a main plate 1321, two bending plates 1322 and two connecting plates 1323, the two connecting plates 1323 are oppositely arranged on the two sides of the main plate 1321 along a third direction Z, and one bending plate 1322 is arranged between the main plate 1321 and the connecting plate 1323; the third direction Z is at a second preset angle with the second direction Y.

[0047] It should be noted that the number of the bending plates 1322, the number of the connecting plates 1323, the first preset angle, the second preset angle, the first direction X, the second direction Y and the third direction Z are not specifically limited in the embodiment, but in order to better illustrate the innovation of the utility model, the first preset angle is 90°, the second preset angle is 90°, the first direction X is the X direction, the second direction Y is the Y direction, the third direction Z is the Z direction, and the tab connecting part 132 includes one main plate 1321, two bending plates 1322 and two connecting plates 1323 in the embodiment, which are taken as examples to illustrate the technical scheme of the utility model.

[0048] Further, the top cover connecting part 131, the main plate 1321, the bending plate 1322 and the connecting plate 1323 are integrally formed, so that the overall structure of the battery pin 13 is more solid, the connection stress between each part is reduced, the tensile strength and the compressive strength of the whole battery pin 13 are improved, and the risk of fracture or deformation is reduced; at the same time, the integrally formed design eliminates the connection and assembly process of multiple parts, simplifies the manufacturing process, improves the production efficiency, thereby reducing the production cost, and avoiding the poor contact or loose problem that may occur in the traditional multi-component connection.

[0049] The top cover connecting part 131 includes a fixing hole 1311, and the pole 121 is fixedly connected with the pole 121 connecting part through the fixing hole 1311. It can be understood that the top cover connecting part 131 can be accurately positioned at the mounting position of the pole 121 through the fixing hole 1311, preventing movement or loosening, thereby ensuring the reliability of the connection. It should be noted that the shape of the fixing hole 1311 is not limited, which can be one of a straight hole, a stepped hole or a tapered hole, and can be selected according to actual conditions.

[0050] The top cover connecting part 131 includes a fuse groove 1312, which is arranged in a spaced manner with the fixing hole 1311, and the long axis of the fuse groove 1312 is parallel to the junction line of the tab connecting part 132 and the top cover connecting part 131. It can be understood that the design of the fuse groove 1312 enables the top cover connecting part 131 to function as a "fuse" when the battery is short-circuited or overcurrent, that is, when the current exceeds a certain threshold, the material at the fuse groove 1312 will first melt due to overheating, thereby interrupting the circuit and preventing overcurrent from further affecting other components of the battery, thereby ensuring the overall safety of the battery.

[0051] Please refer to Figure 2 , Figure 3 and Figure 4 ; wherein Figure 3The structure diagram of the unfolded state of the battery pin is provided for the embodiment of the utility model. Figure 4 The top view when the battery pin is in the unfolded state is provided for the embodiment of the utility model.

[0052] In an embodiment, when the battery pin 13 is in the unfolded state, one side of the bending plate 1322 is connected with the connecting plate 1323, the other side of the bending plate 1322 is connected with the main plate 1321, the connecting plate 1323 is arranged perpendicularly to the main plate 1321, at least two grooves 13220 in communication are arranged on the side of the connecting plate 1323 away from the tab 111, the groove 13220 is located at one end of the bending plate 1322 close to the connecting plate 1323, and the groove 13220 is used for reducing the bending strength of the material of the bending plate 1322 when the bending plate 1322 is bent, so that the material is more easily plastically deformed at the notch, thereby making the bending process more smooth; wherein the minimum opening size of the groove 13220 away from the tab 111 is greater than the maximum opening size of the groove 13220 close to the tab 111.

[0053] Specifically, the cross section of the bending plate 1322 includes connected arc segments 13224 and straight line segments 13225, the arc segments 13224 are arranged close to and connected with the main plate 1321, and the straight line segments 13225 are arranged close to and connected with the connecting plate 1323; wherein the connection between the arc segments 13224 and the straight line segments 13225 is provided with a pre-pressing line 13223, the orthographic projection of the pre-pressing line 13223 on the bending plate 1322 is located in the groove 13220, and the bending plate 1322 is bent in the direction close to the main plate 1321 at the position of the pre-pressing line 13223, so that the connecting plate 1323 is arranged in parallel on one side of the main plate 1321, thereby completing the entire bending process, at this time, the battery pin 13 is in this folded state.

[0054] It can be understood that, by arranging the pre-pressing line 13223 in the groove 13220, the bending plate 1322 is bent at the position of the pre-pressing line 13223, so that the stress concentration area in the bending process is limited near the pre-pressing line 13223, avoiding the stress from spreading to other parts of the bending plate 1322 and the connecting plate 1323.

[0055] And the connecting plate 1323 is provided with at least two recesses 13220 which are in communication and are located away from the side of the tab 111. The recesses 13220 form a multi-section structure. By setting the minimum opening size of the recesses 13220 away from the tab 111 to be greater than the maximum opening size of the recesses 13220 close to the tab 111, when the bending plate 1322 is bent, the stress gradually transitions along the different opening sizes of the two recesses 13220 in the bending process, thereby avoiding stress concentration at a certain point, and reducing the risk of cracking of the bending plate 1322 in the bending process. Specifically, the larger opening size can disperse greater stress, reducing stress concentration in the bending process, while the smaller opening size gradually transitions, making the stress distribution more uniform and not directly concentrated at a certain position.

[0056] In addition, since the bending stress of the bending plate 1322 is uniformly distributed when it is bent, the material of the bending plate 1322 will not be excessively fatigued, and the overall structure can withstand higher cyclic loads, thereby prolonging the service life of the battery pin 13.

[0057] Please continue to combine Figure 3 and Figure 4 ; In an embodiment, the at least two recesses 13220 include a first recess 13221 and a second recess 13222 which are in communication, and the second recess 13222 is located away from the side of the tab 111. The second recess 13222 on the connecting plate 1323 covers the first recess 13221 on the connecting plate 1323, so that when the bending plate 1322 is bent, the bending stress can gradually transition from the first recess 13221 to the second recess 13222, thereby effectively avoiding the risk of cracking of the bending plate 1322 caused by stress concentration.

[0058] Specifically, the second groove 13222 is located on the side of the first groove 13221 away from the tab 111, and the structure of the groove 13220 provides a stress guiding effect in the bending process of the bending plate 1322, so that higher stress is gradually transmitted from the second groove 13222 to the first groove 13221, avoiding the local generation of stress concentration points; wherein the minimum opening size of the second groove 13222 is greater than the maximum opening size of the first groove 13221, so that the second groove 13222 can withstand more stress in the bending process of the bending plate 1322; at the same time, the orthographic projection of the second groove 13222 on the connecting plate 1323 covers the orthographic projection of the first groove 13221 on the connecting plate 1323, which can further ensure that the bending stress is gradually released, so that the bending process of the bending plate 1322 is more stable and reliable, thereby improving the durability and structural stability of the bending plate 1322.

[0059] It should be noted that the number of the groove 13220 is not specifically limited in this embodiment, but in order to better illustrate the innovation of the present application, this embodiment takes the groove 13220 including the first groove 13221 and the second groove 13222 in communication as an example to illustrate the technical scheme of the present application.

[0060] Please refer to Figure 3 , Figure 4 , Figure 5 and Figure 6 ; wherein, Figure 5 is an enlarged view of part A in the Figure 4 provided by the embodiment of the present application; Figure 6 is a structural schematic view of a bending plate provided by the embodiment of the present application.

[0061] In an embodiment, the first groove 13221 includes a first bottom surface 132211 and a first side wall 132212, the first side wall 132212 is arranged around the first bottom surface 132211 to form a first opening 132213 arranged opposite to the first bottom surface 132211, the size of the first opening 132213 is greater than the size of the first bottom surface 132211; the second groove 13222 includes a second bottom surface 132221 and a second side wall 132222, the second side wall 132222 is arranged around the second bottom surface 132221 to form a second opening 132223 arranged opposite to the second bottom surface 132221, the size of the second opening 132223 is greater than the size of the second bottom surface 132221; wherein the first opening 132213 is opened on the second bottom surface 132221, so that the stress transmission in the bending process of the bending plate 1322 is more gentle, avoiding stress concentration and material cracking.

[0062] Specifically, the cross section of the first side wall 132212 comprises a circular arc segment, and the cross section of the second side wall 132222 comprises a circular arc segment, so as to optimize the stress distribution in the bending process of the bending plate 1322, make the stress realize smooth and uniform transition between the second groove and the first groove, and improve the mechanical properties and service life of the overall structure.

[0063] The size of the first opening 132213 is L1, the size of the first bottom surface 132211 is L2, the size of the second opening 132223 is L3, and the size of the second bottom surface 132221 is L4; wherein L3>L4>L2>L1.

[0064] It should be noted that the size of the first opening 132213 is L1, the size of the first bottom surface 132211 is L2, the size of the second opening 132223 is L3, and the size of the second bottom surface 132221 is L4, all refer to the length in the first direction X, that is, the length of the first opening 132213, the length of the first bottom surface 132211, the length of the second opening 132223, and the length of the second bottom surface 132221. Figure 6

[0065] It can be understood that, by setting the first groove 13221 and the second groove 13222 to be in communication with each other, and the size L3 of the second opening 132223 being greater than the size L4 of the second bottom surface 132221, the size L4 of the second bottom surface 132221 being greater than the size L1 of the first opening 132213, and the size L1 of the first opening 132213 being greater than the size L2 of the first bottom surface 132211, the bending plate 1322 realizes multi-stage stress release and gradual transition in the bending process, thereby effectively reducing the risk of local stress concentration.

[0066] Further, the orthogonal projection of the pre-pressing line 13223 on the bending plate 1322 is located on the second bottom surface 132221, and the pre-pressing line 13223 is located on the side of the second bottom surface 132221 close to the main plate 1321; it can be understood that, since the second bottom surface 132221 has a larger size, and the pre-pressing line 13223 is arranged on the second bottom surface 132221, the second bottom surface 132221 can withstand more stress in the bending process of the bending plate 1322 without material yielding or deformation, thereby effectively improving the durability and reliability of the bending plate 1322.

[0067] ​Specifically, when the bending plate 1322 starts to bend, the pre-pressing line 13223 of the bending plate 1322 is located on the second bottom surface 132221, and the second bottom surface 132221 will first bear a large stress. By arranging the second groove 13222 on the side of the first groove 13221 away from the tab 111, the bending stress is gradually transferred from the pre-pressing line 13223 to the large area of the second bottom surface 132221, and the stress is further dispersed to the first groove 13221 through the communication design of the second groove 13222 and the first groove 13221, which can effectively avoid the problem of local stress concentration, reduce the risk of cracks or structural damage of the bending plate 1322, and improve the stability and reliability of the bending plate 1322 during the bending process.

[0068] In addition, the arrangement of the pre-pressing line 13223 also clearly defines the bending position of the bending plate 1322, making the bending process more accurate and controllable; at the same time, simplifying the processing and assembly process, and improving the overall reliability of the product.

[0069] Please continue to combine Figures 3 to 5 In an embodiment, the thickness of the main plate 1321 is L5, and 2L5≥L2≥0.2L5.

[0070] It should be noted that during the bending process of the bending plate 1322, the plastic flow of the material may cause excessive stress in some areas, causing material accumulation or deformation at the bending position. This phenomenon not only affects the accuracy of the battery pin 13, but also may cause stress concentration of the bending plate 1322.

[0071] Specifically, during the bending process of the bending plate 1322, the materials inside and outside the bending plate 1322 will undergo stretching and compression. If the size of the first bottom surface 132211 is too small, the material of the bending plate 1322 in the stress concentration area will flow to both sides due to excessive compression, resulting in uneven plastic flow and causing material extrusion. By arranging 2L5≥L2≥0.2L5, it can be ensured that the first bottom surface 132211 has sufficient size, thereby avoiding material extrusion interference during bending due to the small area. The material of the bending plate 1322 can flow fully in the first bottom surface 132211, and will not be extruded to the surrounding area due to insufficient space, avoiding the occurrence of material extrusion.

[0072] Meanwhile, during the bending process of the bending plate 1322, if the size of the first bottom surface 132211 is large, the local stress will continue to concentrate, causing the heat at the bending position to accumulate and rise, thereby causing material fatigue or even breakage; by setting 2L5≥L2≥0.2L5, the size of the first bottom surface 132211 can be moderate, so that the stress cannot be effectively transferred due to the size of the first bottom surface 132211 being too small, and at the same time, the bending area will not have too high a temperature rise due to the size of the first bottom surface 132211 being too large, thereby effectively reducing the failure risk of the bending plate 1322 during the bending process.

[0073] Please continue to combine Figures 3 to 5 ; in an embodiment, the depth of the first groove 13221 is H1, and the depth of the second groove 13222 is H2; wherein 3 / 4L≥H1+H2≥1 / 4L5; and / or the depth of the first groove 13221 is H1, and the depth of the second groove 13222 is H2; wherein 1.5≥H1 / H2≥0.5; it should be noted that the depth of the first groove 13221 is H1, and the depth of the second groove 13222 is H2, both refer to the length in the third direction Z. Figure 6

[0074] It can be understood that if the depth of the first groove 13221 and the depth of the second groove 13222 are too small, the bending area of the bending plate 1322 will lack buffer space, and the stress will concentrate on the second bottom surface 132221, thereby increasing the risk of stress instability of the bending plate 1322 during bending; by setting the depth of the first groove 13221 to be H1 and the depth of the second groove 13222 to be H2, wherein 3 / 4L≥H1+H2≥1 / 4L5, the bending plate 1322 can have sufficient bending space, and at the same time, cracking of the bending plate 1322 due to weak material during the bending process can be avoided.

[0075] At the same time, if the depth of the second groove 13222 is too small, the stress will accumulate on the second bottom surface 132221 and cannot be effectively transferred to the first groove 13221, thereby forming a stress concentration point on the second bottom surface 132221, increasing the risk of cracks in the bending plate 1322, and if the depth of the first groove 13221 is too small, it cannot play a role in assisting stress dispersion, causing more stress to concentrate in the second groove 13222; by setting the depth of the first groove 13221 to be H1 and the depth of the second groove 13222 to be H2, 1.5≥H1 / H2≥0.5, the stress dispersion effect can be optimized, and the stress concentration phenomenon in the local area of the bending plate 1322 during the bending process can be reduced. ​

[0076] Please continue to combine Figures 3 to 5 ; in an embodiment, the first side wall 132212 is arranged to be inclined relative to the first bottom surface 132211, and an inclination angle a between the first side wall 132212 and the first bottom surface 132211 is greater than or equal to 120 degrees and less than or equal to 150 degrees; the second side wall 132222 is arranged to be inclined relative to the second bottom surface 132221, and an inclination angle β between the second side wall 132222 and the second bottom surface 132221 is greater than or equal to 120 degrees and less than or equal to 150 degrees.

[0077] When the bending plate 1322 is subjected to external force during bending, the first side wall 132212 is arranged to be inclined relative to the first bottom surface 132211, and the second side wall 132222 is arranged to be inclined relative to the second bottom surface 132221, which helps to provide a larger contact area for stress dispersion, thereby reducing the degree of concentration of bending stress; wherein the gentle inclination angle can effectively reduce the possibility of stress concentration of the bending plate 1322 at the sharp edge or right angle transition during bending, thereby more evenly distributing the stress on the bending plate 1322 to the inner surface of the first groove 13221 and the second groove 13222, reducing the local stress peak.

[0078] It can be understood that, by arranging the inclination angle β between the second side wall 132222 and the second bottom surface 132221 to be greater than or equal to 120 degrees and less than or equal to 150 degrees, the stress of the pre-pressing line 13223 and its surrounding area can be transitioned from the second groove 13222 to the first groove 13221 in a more natural way; at the same time, by arranging the inclination angle a between the first side wall 132212 and the first bottom surface 132211 to be greater than or equal to 120 degrees and less than or equal to 150 degrees, the curved transition area formed between the first side wall 132212 and the first bottom surface 132211 effectively avoids sharp changes in stress, thereby reducing stress concentration and ensuring that the first groove 13221 does not become a stress concentration point during bending, thereby significantly improving the smoothness of the bending plate 1322 during bending.

[0079] Meanwhile, the inclination angle α between the first side wall 132212 and the first bottom surface 132211 is greater than or equal to 120 degrees and less than or equal to 150 degrees, and the inclination angle β between the second side wall 132222 and the second bottom surface 132221 is greater than or equal to 120 degrees and less than or equal to 150 degrees, so as to provide greater bearing capacity for the first groove 13221 and the second groove 13222, and enable the first groove 13221 and the second groove 13222 to better bear bending stress and prevent the structure from failing due to high stress in long-term use.

[0080] The above has carried out the detailed introduction to the embodiment of the utility model, the principle and implementation mode of the utility model have been set forth with the application of specific example in this paper, the above embodiment explanation is only for helping understanding the method of the utility model and its core thought; simultaneously, for the technical personnel of the field, according to the thought of the utility model, there will be the change in specific implementation mode and application range, and the above-mentioned is described, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A battery pin, characterized in that, The application relates to a battery pin and a manufacturing method thereof. The battery pin comprises a lug connecting part, which comprises a main plate, a bending plate and a connecting plate connected with each other, the main plate is connected to one side of the bending plate, the connecting plate is connected to the other side of the bending plate in a bendable mode, and the connecting plate is used for connecting the lug of a battery. At least two grooves are arranged on the side of the connecting plate away from the lug and are connected with each other, the grooves are arranged at the end of the bending plate close to the connecting plate, and the minimum opening size of the groove away from the lug is greater than the maximum opening size of the groove close to the lug.

2. The battery pin of claim 1, wherein, The at least two grooves comprise a first groove and a second groove connected with each other, and the second groove is arranged on the side of the first groove away from the lug. The second groove is projected on the connecting plate and covers the projection of the first groove on the connecting plate.

3. The battery pin of claim 2, wherein, The first groove comprises a first bottom surface and a first side wall, the first side wall is arranged around the first bottom surface to form a first opening arranged opposite to the first bottom surface, and the size of the first opening is greater than that of the first bottom surface. The second groove comprises a second bottom surface and a second side wall, the second side wall is arranged around the second bottom surface to form a second opening arranged opposite to the second bottom surface, and the size of the second opening is greater than that of the second bottom surface.

4. The battery pin of claim 3, wherein, The first side wall is arranged in an inclined mode relative to the first bottom surface, and the inclination angle between the first side wall and the first bottom surface is greater than or equal to 120 degrees and smaller than or equal to 150 degrees. The second side wall is arranged in an inclined mode relative to the second bottom surface, and the inclination angle between the second side wall and the second bottom surface is greater than or equal to 120 degrees and smaller than or equal to 150 degrees.

5. The battery pin of claim 3, wherein, The size of the first opening is L1, the size of the first bottom surface is L2, the size of the second opening is L3, and the size of the second bottom surface is L4; wherein L3>L4>L2>L1.

6. The battery pin of claim 5, wherein, The thickness of the main plate is L5, and 2L5>=L2>=0.2L5.

7. The battery pin of claim 6, wherein, The depth of the first groove is H1, and the depth of the second groove is H2; wherein 3 / 4L>=H1+H2>=1 / 4L5; and / or The depth of the first groove is H1, and the depth of the second groove is H2; wherein 1.5>=H1 / H2>=0.

5.

8. The battery pin of any one of claims 1 to 7, wherein, The cross section of the bending plate comprises an arc segment and a straight segment connected with each other, the arc segment is arranged close to the main plate and is connected, and the straight segment is arranged close to the connecting plate and is connected. The connection part of the lug of the battery pin further comprises a top cover connecting part used for connecting the pole of a top plate, the top cover connecting part is connected with one end of the main plate; wherein 9. The battery pin of any one of claims 1 to 7, wherein, The top cover connecting part, the main plate, the connecting plate and the bending plate are integrally formed; and / or The top cover connecting part comprises a fixing hole, the pole is fixedly connected with the lug connecting part through the fixing hole; and / or The top cover connecting part comprises a fixing hole, the pole is fixedly connected with the lug connecting part through the fixing hole; and / or, The top cover connecting portion includes a fuse groove, a long axis of the fuse groove being parallel to a junction line of the top cover connecting portion and the main plate.

10. A battery, characterized by A battery pin comprising any of claims 1 to 9.

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