Battery pin and battery

Abstract

A battery pin and a battery. The battery pin comprises a top cover connecting portion and a tab connecting portion. The tab connecting portion comprises a main body plate, a connecting plate, and a bending plate, wherein the bending plate is configured to be connected to a tab. The top cover connecting portion is bendably connected to one end of the main body plate, the bending plate is bendably connected to one side of the connecting plate, and the main body plate is bendably connected to the other side of the connecting plate.

Description

Battery pins and battery

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 30, 2023, with application number 202323262945.4. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery pin and a battery. Background Art

[0003] In the related art, the pins of the battery top cover are connected to the positive / negative pole tabs of the core pack through an ultrasonic welding process, so that the current can flow from the inside of the bare core pack to the outside of the battery. Usually, after the core pack tabs are connected to the pins of the battery top cover through an ultrasonic welding process, the pins will be folded flat and placed in the shell. SUMMARY OF THE INVENTION

[0004] In related technologies, due to the nature of the pin material itself, springback will occur after bending. After the pin is bent and rebounded, it will occupy a certain space, resulting in a reduction in the gap between the assembly and the shell, thereby affecting the core package into the shell.

[0005] In a first aspect, the present application provides a battery pin configured to connect a pole of a top cover and a tab of a core pack, the battery pin comprising:

[0006] a top cover connection portion, configured to be connected to a pole; and

[0007] The tab connection portion includes a main plate, a connecting plate and a bent plate, wherein the bent plate is configured to be connected to the tab;

[0008] The top cover connecting portion is bent and connected to one end of the main body plate, the bent plate is bendably connected to one side of the connecting plate, and the main body plate is bent and connected to the other side of the connecting plate.

[0009] In a second aspect, the present application further provides a battery. The battery includes a battery pin, the battery pin comprising a top cover connection portion and a tab connection portion, the top cover connection portion being configured to connect to the terminal post; the tab connection portion comprising a main plate, a connecting plate, and a bent plate, the bent plate being configured to connect to the tab; wherein the top cover connection portion is bendably connected to one end of the main plate, the bent plate is bendably connected to one side of the connecting plate, and the main plate is bendably connected to the other side of the connecting plate. Beneficial effects

[0010] In the technical solution of the present application, the battery pin is configured to connect the pole of the top cover and the pole ear of the core pack, and the battery pin includes a top cover connecting part configured to be electrically connected to the pole and a pole ear connecting part connected to one end of the top cover connecting part. Specifically, the pole ear connecting part includes a main body plate, a connecting plate and a bending plate. The bending plate is bent on one side of the main body plate through the connecting plate. Due to the action of the connecting plate, the bending plate will not rebound, so the bending plate will not occupy additional space, thereby improving the space utilization of the battery. In addition, since the bending plate will not rebound, there is no need to squeeze the bending plate during installation, which makes the installation of the battery pin more convenient and the installation efficiency higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG1 is a schematic diagram of the structure of battery pins provided by some implementations of the present application;

[0012] FIG2 is a schematic structural diagram of the battery pins in FIG1 in an expanded state;

[0013] FIG3 is a schematic structural diagram of the battery pins in FIG1 in a folded state;

[0014] FIG4 is a bottom plan view of FIG3;

[0015] FIG5 is an enlarged schematic diagram of A in FIG4 ;

[0016] FIG6 is a schematic diagram of the structure of a battery provided by some implementations of the present application.

[0017] Description of reference numerals:

[0018] 100, battery pin; 101, top cover connection part; 102, tab connection part; 103, main body plate; 104, connecting plate; 105, bending plate; 106, outer side surface; 107, inner side surface; 108, thinning groove; 109, pre-pressing line; 110, first arc segment; 111, straight line segment; 112, second arc segment; 113, first groove wall; 114, second groove wall; 115, first section; 116, first part; 117, second part; 118, connecting hole; 1000, battery; 200, core pack; 201, tab; 300, top cover; 301, pole. Modes for Carrying Out the Invention

[0019] In the related art, the pins of the battery top cover are connected to the positive / negative pole ears of the core package through an ultrasonic welding process, so that the current can flow from the inside of the bare core package to the outside of the battery. Normally, after the core package ears are connected to the pins of the battery top cover through an ultrasonic welding process, the pins will be folded flat and placed in the shell. However, due to the nature of the pin material itself, it will rebound after bending. After the pins are bent and rebounded, they will occupy a certain space, resulting in a reduction in the gap between the assembly and the shell, thereby affecting the core package into the shell.

[0020] In view of this, the present application proposes a battery pin. Figures 1 to 5 are structural schematic diagrams of an embodiment of the battery pin 100 provided by the present application. The battery pin 100 provided by the present application has a simple structure, a simple process, and a simple installation process. It can also prevent it from rebounding and improve space utilization. The battery pin 100 will be described in detail below in conjunction with the main drawings.

[0021] Please refer to Figures 1, 2 and 3. The present application provides a battery pin 100, which is configured to connect the pole 301 of the top cover 300 and the pole ear 201 of the core package 200. The battery pin 100 includes a top cover connecting portion 101 and a pole ear connecting portion 102. The top cover connecting portion 101 is configured to be connected to the pole 301; the pole ear connecting portion 102 includes a main plate 103, a connecting plate 104 and a bending plate 105, and the bending plate 105 is configured to be connected to the pole ear 201; wherein, the top cover connecting portion 101 is bently connected to one end of the main plate 103, the bending plate 105 can be bently connected to one side of the connecting plate 104, and the main plate 103 is bently connected to the other side of the connecting plate 104.

[0022] In the technical solution of the present application, the battery pin 100 is used to connect the pole 301 of the top cover 300 and the pole ear 201 of the core package 200. The battery pin 100 includes a top cover connecting part 101 configured to be electrically connected to the pole 301 and a pole ear connecting part 102 connected to one end of the top cover connecting part 101. Specifically, the pole ear connecting part 102 includes a main plate 103, a connecting plate 104 and a bending plate 105. The bending plate 105 is bent on one side of the main plate 103 through the connecting plate 104. Due to the action of the connecting plate 104, the bending plate 105 will not rebound, so the bending plate 105 will not occupy additional space, thereby improving the space utilization of the battery 1000. In addition, since the bending plate 105 will not rebound, there is no need to squeeze the bending plate 105 during installation, which makes the installation of the battery pin 100 more convenient and the installation efficiency higher.

[0023] Specifically, in this embodiment, the bending plate 105 is bendably connected to one side of the connecting plate 104, which means that the bending plate 105 can be connected to the connecting plate 104 in a horizontal plane, or can be arranged opposite to the main plate 103 (that is, the bending plate 105 and the connecting plate 104 are in two planes); the bending plate 105 is bendably connected to the other side of the connecting plate 104, which means that the bending plate 105 and the connecting plate 104 are not in the same horizontal plane.

[0024] Specifically, in this embodiment, the main plate 103 plays a supporting role, and the bending plate 105 plays a connecting role. More specifically, in actual use, the main plate 103 is connected to the core package 200 of the battery 1000, and the main plate 103 is configured to support the bending plate 105. The bending plate 105 is connected to the tab 301 of the battery 1000, and the bending plate 105 is configured to transmit current.

[0025] It should be noted that in some embodiments, the battery pin 100 includes a top cover connection portion 101 and a tab connection portion 102. The battery pin 100 may be a sheet metal part, a metal aluminum pin, or a metal copper pin, but is not limited thereto. The selection may be based on actual conditions.

[0026] The manufacturing method of the battery pin 100 is not limited. Specifically, it can be formed by punching, stamping, bending, etc. a metal plate, or it can be manufactured by integral molding, bending, etc. In some embodiments, the battery pin 100 is manufactured by an integral molding process, which can improve material utilization and production efficiency.

[0027] In this embodiment, the battery pin 100 has an unfolded state and a folded state (the unfolded state is the state of the battery pin 100 when it is prepared and formed, and the folded state is the actual use state of the battery pin 100), and the top cover connecting portion 101 includes a first plate, which is connected to the terminal 301; specifically, in the unfolded state, please refer to Figure 2, the first plate, the main body plate 103, the connecting plate 104 and the bent plate 105 are in the same horizontal plane; in the folded state, please refer to Figure 3, taking the first direction in Figure 1 as an example, the first direction and the second direction are perpendicular, the first plate extends along the first direction, the main body plate 103 extends along the second direction (that is, there is a preset angle between the main body plate 103 and the first plate), and the bent plate 105 moves in a direction close to the main body plate 103 until the bent plate 105 is superimposed on the main body plate 103, at which time the connecting plate 104 is in a bent state (that is, the bending plate 105 is superimposed on the main body plate 103 by bending the connecting plate 104). It should be noted that the bending plate 105 and the main plate 103 can be at a preset angle or in parallel. In order to improve space utilization, the main plate 103 and the bending plate 105 are arranged at intervals and are in parallel.

[0028] Specifically, in the actual production process, in order to facilitate production, the battery pin 100 is often prepared in an integrated molding manner, because the first plate, the main plate 103, the connecting plate 104 and the bending plate 105 on the prepared battery pin 100 are in the same horizontal plane. In order to facilitate the stacking of the bending plate 105 on the main plate 103, the connecting plate 104 is thinned, so that the connecting plate 104 is easier to deform during the bending process, which is convenient for processing. Specifically, please refer to Figures 3 and 4. The connecting plate 104 has an outer side surface 106 close to the core package 200 and an inner side surface 107 away from the core package 200. A thinning groove 108 is formed on the connecting plate 104, and the opening of the thinning groove 108 is formed on the inner side surface 107. It should be noted that the specific position of the thinning groove 108 is not limited. In one embodiment, the thinning groove 108 is located at the connection between the connecting plate 104 and the main plate 103.

[0029] In another embodiment, the thinning groove 108 is located at the junction of the connecting plate 104 and the bent plate 105. More specifically, during the actual production process, the main plate 103 is first welded to the core package 200 of the battery 1000. After the main plate 103 is fixed, the operator can use a tool to bend the bent plate 105 to one side of the main plate 103. Because the thinning groove 108 is formed on the connecting plate 104, the thickness at the thinning groove 108 is smaller than the thickness at other locations. Therefore, during the bending process, the connecting plate 104 has less strength at the thinning groove 108, and the connecting plate 104 will preferentially deform at the thinning groove 108. This arrangement allows the connecting plate 104 to deform and bend at a specific location, making it easier for the operator to operate. At the same time, the ability to deform the connecting plate 104 at a specific location can prevent the main plate 103 from being pulled during the deformation process, which may cause the main plate 103 and the core package 200 of the battery 1000 to become unsoldered.

[0030] It should be noted that, in order to avoid the bending plate 105 from being affected during the bending process of the connecting plate 104, in this embodiment, please continue to refer to Figures 2, 3 and 4. The main plate 103, the connecting plate 104 and the bending plate 105 are integrally arranged, and a pre-pressing line 109 is further provided on the inner side 107 of the connecting plate 104. The specific position of the pre-pressing line 109 is not limited. In one embodiment, if the thinning groove 108 is formed at the connection between the connecting plate 104 and the main plate 103, the pre-pressing line 109 is formed at the connection between the connecting plate 104 and the bending plate 105; in another embodiment, if the thinning groove 108 is formed at the connection between the connecting plate 104 and the main plate 103, the pre-pressing line 109 is formed at the connection between the connecting plate 104 and the bending plate 105. At the connection of the bending plate 105, the pre-stressing line 109 is formed at the connection of the connecting plate 104 and the main plate 103; it should be noted that in the actual bending process, the connecting plate 104 needs to be bent at two locations, one is the position where the connecting plate 104 is connected to the main plate 103, and the other is the position where the connecting plate 104 is connected to the bending plate 105. The pre-stressing line 109 is arranged on the inner side of the connecting plate 104 and is close to the bending plate 105. During the bending process of the bending plate 105, the connecting plate 104 will bend at the position of the pre-stressing line 109, so that the bending plate 105 is parallel to one side of the main plate 103, completing the entire bending process.

[0031] In some embodiments, referring to Figures 4 and 5, the outer side surface 106 of the connecting plate 104 includes a first arc segment 110, a straight line segment 111, and a second arc segment 112 connected in sequence, the first arc segment 110 is arranged close to the bending plate 105, the second arc segment 112 is close to the main plate 103, and the radius of the first arc segment 110 is smaller than the radius of the second arc segment 112. Specifically, in this embodiment, the outer side surface 106 of the connecting plate 104 is composed of a straight line segment 111 and two arc segments. The first arc segment 110 is formed by the pre-pressing line 109 during the bending process, and the second arc segment 112 is composed of the bottom of the thinning groove 108. The thinning groove 108 has a first groove wall 113 close to the bending plate 105 and a second groove wall 114 away from the pole ear 201. The position between the first groove wall 113 and the pre-pressing line 109 is the first segment 115, and the straight line segment 111 is composed of the first segment 115. Therefore, the first arc segment 110, the straight line segment 111 and the second arc segment 112 of the outer side surface 106 of the connecting plate 104 are jointly composed of the thinning groove 108 and the pre-pressing line 109. This state can effectively avoid the rebound phenomenon of the connecting plate 104 after bending, thereby improving the volume utilization rate of the battery 1000.

[0032] In some embodiments, please continue to refer to FIGS. 4 and 5. In this embodiment, in order to ensure the improvement of the volume utilization rate of the battery 1000, the orthographic projection of the pre-pressing line 109 on the connecting portion is located within the boundary of the straight line segment 111; and the distance from the first arc segment 110 to the end of the bending plate 105 far from the main body plate 103 is L1, and the distance from the pre-pressing line 109 to the end of the bending plate 105 far from the main body plate 103 is L2, where L1 > L2. With this setting, it is possible to effectively avoid the phenomenon of springback after the connecting plate 104 is bent, so that the bending plate 105 and the main body plate 103 can be in a relatively parallel state, improving the volume utilization rate of the battery 1000.

[0033] More specifically, in one embodiment, the bottom of the thinning groove 108 is provided with an arc, and the center of the second arc segment 112 is concentric with the center of the bottom of the thinning groove 108. With this setting, the second arc segment 112 can be completely formed by the thinning groove 108, so that the connecting plate 104 is deformed and bent at a specific position, which is more convenient for the operator to operate. At the same time, the connecting plate 104 can be deformed at a specific position, which can avoid pulling the main body plate 103 during the deformation process, resulting in the de-welding of the main body plate 103 and the core package of the battery 1000.

[0034] In some embodiments, the distance between the first groove wall 113 and the second groove wall 114 is A, the thickness of the connecting plate is C, and the distance between the first groove wall 113 and the pre-pressing line 109 is D, where 0.5C < A < 2C, 0 < D ≤ 2C. For example, in a specific embodiment, when the thickness C of the connecting plate is 1 mm, the value of the distance D between the first groove wall 113 and the pre-pressing line 109 is 0 < D ≤ 2.0 mm, and the value of the distance A between the first groove wall 113 and the second groove wall 114 is 0.5 mm < A < 2 mm. More specifically, the distance between the first groove wall 113 and the pre-pressing line 109 can be 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm; the distance between the first groove wall 113 and the second groove wall 114 can be 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm; the D value and the A value can be selected according to the actual situation.

[0035] Please refer to Figure 2, which shows the battery pin 100 in an expanded state. Taking the third direction in the figure as an example, the third direction and the fourth direction are perpendicular to each other in the horizontal plane; the main plate 103 includes a first portion 116 and a second portion 117, the first portion 116 is connected between the top cover connecting portion 101 and the second portion 117, and the top cover connecting portion 101 is bent and connected to the first portion 116. Specifically, the first portion 116 extends along the fourth direction, and the first portion 116 has a first end and a second end oppositely arranged along the fourth direction, the first end is connected to the top cover connecting portion 101, and the second end is connected to the second portion 117. The main plate 1 03 is connected to the second part 117 by a bending connection plate 104, the second part 117 is extended along the third direction, the second part 117 has a third end and a fourth end arranged opposite to each other along the fourth direction, and the third end is connected to the first connection part; more specifically, in order to save materials, the width of the first part 116 is L3, the sum of the widths of the second part 117, the connecting plate 104 and the bent plate 105 is L4, the width of the first part 116 is L5, and the width of the top cover connection part 101 is L6, which limits L3=L4, L5=L6. In this way, when in the unfolded state, the battery pin 100 is in the shape of a "1".

[0036] Specifically, the top cover connection portion 101 and the tab connection portion 102 are arranged at an angle. In some embodiments, the angle between the top cover connection portion 101 and the tab connection portion 102 can be 90°, that is, under ideal conditions, the angle between the top cover connection portion 101 and the tab connection portion 102 is 90°. Affected by process accuracy, etc., the angle between the top cover connection portion 101 and the tab connection portion 102 can be about 90°, for example, 89°, 88°, 87°, 91°, 92°, and 95°; the angle between the top cover connection portion 101 and the tab connection portion 102 can be achieved by a one-time bending process, and the angle between the top cover connection portion 101 and the tab connection portion 102 can be set as needed, and this application does not impose any restrictions on this.

[0037] Specifically, referring to FIG1 , the top cover connecting portion 101 is formed with a communication hole 118 that passes through the top cover connecting portion 101 and is used to engage with the terminal 301. It should be noted that the shape of the communication hole 118 is not limited and can be a straight hole (i.e., the diameter of the communication hole 118 is the same throughout the extension direction of the communication hole 118), a stepped hole, or a tapered hole, and the selection can be made based on actual conditions.

[0038] This application also proposes a battery 1000, as shown in Figure 6, which includes a battery pin 100. Since this battery 1000 adopts all technical solutions of all embodiments of the battery pin 100, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be detailed here.

Claims

1. A battery pin, configured to connect a pole (301) of a top cover (300) and a pole ear (201) of a core package (200), comprising: A top cover connection portion (101) is configured to be connected to the pole (301); and A pole lug connecting portion (102), comprising a main body plate (103), a connecting plate (104) and a bending plate (105), wherein the bending plate (105) is configured to be connected to the pole lug (201); The top cover connection portion (101) is bently connected to one end of the main body plate (103), the bent plate (105) can be bently connected to one side of the connecting plate (104), and the main body plate (103) is bently connected to the other side of the connecting plate (104).

2. The battery pin according to claim 1, wherein: A thinning groove (108) is formed on the connecting plate (104), and the thinning groove (108) is located at the connection between the connecting plate (104) and the main plate (103); or, A thinning groove (108) is formed on the connecting plate (104), and the thinning groove (108) is located at the connection between the connecting plate (104) and the bending plate (105).

3. The battery pin according to claim 2, wherein: The connecting plate (104) has an outer side surface (106) close to the core package (200) and an inner side surface (107) away from the core package (200), and the opening of the thinning groove (108) is formed on the inner side surface (107).

4. The battery pin according to claim 2, wherein: The connecting plate (104) has an outer side surface (106) close to the core package (200) and an inner side surface (107) away from the core package (200), and a pre-pressing line (109) is also provided on the inner side surface (107) of the connecting plate (104). The pole ear connecting portion (102) is integrally arranged, and one of the connection between the connecting plate (104) and the main plate (103) and the connection between the connecting plate (104) and the bending plate (105) is provided with the pre-pressing line (109), and the other is provided with the thinning groove (108).

5. The battery pin according to claim 4, wherein: The outer side surface (106) of the connecting plate (104) comprises a first arc segment (110), a straight segment (111) and a second arc segment (112) which are connected in sequence, wherein the first arc segment (110) is arranged close to the bending plate (105), and the second arc segment (112) is close to the main body plate (103), and the radius of the first arc segment (110) is smaller than the radius of the second arc segment (112).

6. The battery pin according to claim 5, wherein: The orthographic projection of the pre-pressing line (109) on the connecting portion is located within the boundary of the straight line segment (111); The distance from the first arc segment (110) to the end of the bending plate (105) away from the main plate (103) is L1, and the distance from the pre-pressing line (109) to the end of the bending plate (105) away from the main plate (103) is L2, wherein L1>L2.

7. The battery pin according to claim 6, wherein: The groove bottom of the thinning groove (108) is arranged in the shape of an arc, and the center of the second arc segment (112) is arranged concentrically with the center of the groove bottom of the thinning groove (108).

8. The battery pin according to claim 4, wherein: The thinning groove (108) has a first groove wall (113) close to the bending plate (105) and a second groove wall (114) away from the bending plate (105), the distance between the first groove wall (113) and the second groove wall (114) is A, the thickness of the connecting plate (104) is C, the distance between the first groove wall (113) and the pre-pressing line (109) is D, 0.5C <A<2C,0<D≤2C。 9. The battery pin according to any one of claims 1 to 8, wherein: The main body plate (103) comprises a first part (116) and a second part (117), wherein the first part (116) is connected between the top cover connecting portion (101) and the second part (117), the top cover connecting portion (101) is connected to the first part (116) in a bent manner, and the bent plate (105) is connected to the second part (117) in a bent manner through the connecting plate (104), the width of the first part (116) is L3, the sum of the widths of the second part (117), the connecting plate (104) and the bent plate (105) is L4, the width of the first part (116) is L5, and the width of the top cover connecting portion (101) is L6, wherein L3=L4, and L5≤L6.

10. The battery pin according to any one of claims 1 to 8, wherein: The top cover connection portion (101) and the tab connection portion (102) are integrally formed.

11. The battery pin according to any one of claims 1 to 8, wherein: The preset angle between the top cover connection portion (101) and the tab connection portion (102) is 89° to 95°.

12. The battery pin according to claim 11, wherein: The preset angle between the top cover connection portion (101) and the tab connection portion (102) is 90°.

13. The battery pin according to any one of claims 1 to 8, wherein: A communication hole (118) penetrating the top cover connection portion (101) is formed on the top cover connection portion (101), and the communication hole (118) is used for clamping with the pole (301).

14. The battery pin according to any one of claims 1 to 8, wherein: The battery pin (100) comprises an aluminum pin or a copper pin.

15. A battery, comprising the battery pin (100) according to any one of claims 1 to 14.

16. The battery according to claim 15, further comprising a top cover (300) and a core pack (200), wherein the top cover connecting portion (101) is connected to the pole (301) of the top cover (300), and the pole tab connecting portion (102) is connected to the pole tab (201) of the core pack (200).

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