Pole, battery and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a pole, a battery and a battery pack, the pole comprises a pole body and a base; the base comprises a main body part and a plurality of first annular convex parts, the plurality of first annular convex parts are arranged around the column body, and every two adjacent first annular convex parts are arranged at intervals. In practical application, the pole is formed through stamping, the main body part of the base is fed to form the first annular protruding parts during stamping forming, that is, in the forming process of the main body part, part of materials can be fed in the axial direction to form the multiple first annular protruding parts, and radial feeding is uniform in the forming process of the main body part, so that the forming quality of the pole is improved. And the radial dimensional tolerance of the formed main body part is not too large, so that the production quality of the pole during mass production is relatively stable.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a terminal, a battery and a battery pack. Background Art

[0002] In the related art, a cylindrical battery includes a housing, a winding core, a rubber plug and a terminal. The housing has an opening. The winding core is disposed inside the housing. The rubber plug seals the opening and is provided with an installation hole axially penetrating through the housing. The terminal passes through the installation hole. One end of the terminal extends into the housing and is electrically connected to the winding core, and the other end extends out of the housing. Among them, the terminal includes a cylinder and a circular base. The cylinder passes through the installation hole. The base is disposed at one end of the cylinder facing inside the housing, and the base contacts the surface of the rubber plug facing inside the housing. Thus, it can prevent the terminal from being pushed out by air pressure when the air pressure in the cylindrical battery is too high.

[0003] However, for the terminal with the above structure, since it is formed by stamping, and the diameter of the base is larger than that of the cylinder, the diameter difference between the cylinder and the base is relatively large. Therefore, the radial deformation amount of the base during the forming process is relatively large, which results in a relatively large diameter tolerance in the forming process of the base. That is, among a plurality of terminals produced in mass production, the difference between the maximum diameter and the minimum diameter of the base is relatively large, and the production quality of the terminals is unstable. Summary of the Utility Model

[0004] The main object of the utility model is to provide a terminal with relatively stable production quality during mass production.

[0005] To achieve the above object, the utility model provides a terminal, including a column body and a base;

[0006] The base includes a main body portion and a first annular convex portion. The main body portion is in a plate shape, and the first annular convex portion is connected to one surface of the main body portion in its thickness direction;

[0007] One end of the column body in its axial direction is connected to one surface of the main body portion in its thickness direction, and the axial direction of the column body is parallel to the thickness direction of the column body portion;

[0008] Among them, the number of the first annular convex portions is multiple, and the multiple first annular convex portions are all arranged around the column body, and two adjacent first annular convex portions are spaced apart.

[0009] In a specific embodiment of the utility model, the column body includes a main body section and an arc transition section connected to each other along its axial direction, and the arc transition section is connected to the main body portion.

[0010] In a specific embodiment of the utility model, the main body section is cylindrical.

[0011] In a specific embodiment of the present utility model, the orthographic projection of the main body portion in its thickness direction is circular or elliptical.

[0012] The present utility model also provides a battery, comprising a housing, a winding core, an insulating member, and a pole column as described above;

[0013] The housing has a first mounting through hole;

[0014] The winding core is disposed within the housing;

[0015] The insulating member seals the first mounting through hole. The insulating member has a second mounting through hole, and the axis of the second mounting through hole is parallel to the axis of the first mounting through hole;

[0016] The column body passes through the second mounting through hole, and the outer peripheral surface of the column body is in tight contact with the wall surface of the second mounting through hole. The base is located within the housing, and the surface of the main body portion facing the inside of the housing is electrically connected to the winding core.

[0017] In a specific embodiment of the present utility model, the housing is cylindrical, the first mounting through hole is located at one end of the housing along its axial direction, and the inner peripheral surface of the housing defines the wall surface of the first mounting through hole;

[0018] The outer peripheral surface of the housing near the first mounting through hole deflects inwardly towards the inside of the housing, forming a first annular groove around its axis on the outer peripheral surface of the housing, and a second annular protrusion corresponding to the first annular groove on the inner peripheral surface of the housing. The housing confines the insulating member into a cylinder, and the second annular protrusion compresses the outer wall surface of the insulating member, such that a second annular groove is formed on the outer peripheral wall of the insulating member around its axis.

[0019] In a specific embodiment of the present utility model, it further includes a conductor, and the conductor is fixedly connected to the end of the column body away from the base.

[0020] In a specific embodiment of the present utility model, a first mounting groove and a second mounting groove are provided on the surface of the insulating member facing away from the inside of the housing. The first mounting groove is annular, the second mounting groove is located inside the first mounting groove, and the second mounting through hole penetrates from the bottom surface of the second mounting groove to the surface of the insulating member facing the inside of the housing;

[0021] The battery further includes a plate, the plate is annular, and the plate is embedded in the first mounting groove;

[0022] The housing is made of a conductive material. A part of the housing located at the edge of the first mounting through-hole is folded towards the center to form an annular flanging. The surface of the flanging facing the inside of the housing is tightly pressed and attached to the surface of the insulating member facing away from the winding core, and the flanging contacts the electrode plate. The electrode plate is electrically connected to the winding core through the housing;

[0023] The conductor is embedded in the second mounting groove.

[0024] In a specific embodiment of the present invention, the electrode plate is provided with a third mounting through-hole penetrating along its thickness direction;

[0025] The insulating member further has a boss portion. The boss portion is located on the bottom surface of the first mounting groove and passes through the third mounting through-hole. The insulating member is further provided with a liquid injection hole. The liquid injection hole penetrates from the surface of the boss portion facing away from the bottom surface of the first mounting groove to the surface of the insulating member facing the winding core;

[0026] The battery further includes a sealing nail, and the sealing nail is sealingly inserted into the liquid injection hole.

[0027] The present invention further provides a battery pack, including a box body and the battery as described above, and the battery is disposed in the box body.

[0028] Compared with the prior art, an electrode post, a battery and a battery pack according to an embodiment of the present invention have the following beneficial effects:

[0029] In practical applications, the electrode post according to the embodiment of the present invention is formed by stamping. During the stamping process of the main body portion of the base, the material feeding forms a first annular protrusion portion. That is, during the forming process of the main body portion, part of the material will feed axially to form a plurality of first annular protrusion portions. The radial material feeding of the main body portion is relatively uniform during the forming process. Therefore, the tolerance of the radial dimension of the main body portion after forming is not too large. Based on this, the production quality of the electrode post during mass production is relatively stable. Description of the Drawings

[0030] Figure 1 is a perspective view of the electrode post according to an embodiment of the present invention;

[0031] Figure 2 is an enlarged view of A in an embodiment of the present invention Figure 1 in;

[0032] Figure 3 is a structural diagram of the battery according to an embodiment of the present invention;

[0033] Figure 4 is a cross-sectional view of the battery according to an embodiment of the present invention;

[0034] Figure 5 is an embodiment of the present inventionFigure 4 Magnified view of middle B;

[0035] Figure 6 It is a three-dimensional diagram of an insulating member according to an embodiment of the utility model;

[0036] Figure 7 It is a three-dimensional diagram of the cooperation between the pole and the conductor in the embodiment of the utility model.

[0037] In the figure, 100, pole; 1, cylinder; 11, main section; 12, arc transition section; 2, base; 21, main body; 22, first annular protrusion; 10, shell; 1001, first mounting hole; 1002, first annular groove; 101, second annular protrusion; 102, folded edge; 20, winding core; 30, insulating part; 3001, second mounting hole; 3002, second annular groove; 3003, first mounting groove; 3004, second mounting groove; 301, boss; 3010, injection hole; 40, conductor; 50, pole plate; 501, third mounting hole; 60, sealing nail. DETAILED DESCRIPTION

[0038] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0039] like Figure 1 and Figure 2 As shown, a pole 100 of an embodiment of the utility model comprises a column 1 and a base 2; the base 2 comprises a main body 21 and a first annular protrusion 22, the main body 21 is plate-shaped, and one side of the main body 21 in the thickness direction is connected to the first annular protrusion 22; one end of the column 1 in the axial direction is connected to one side of the main body 21 in the thickness direction, and the axial direction of the column 1 is parallel to the thickness direction of the main body 21; wherein, the number of the first annular protrusions 22 is multiple, and the multiple first annular protrusions 22 are all arranged around the column 1, and two adjacent first annular protrusions 22 are arranged at intervals.

[0040] In actual application, the pole 100 is formed by stamping, wherein the main body 21 of the base 2 is formed by moving the material during stamping to form a first annular protrusion 22, that is, during the forming process of the main body 21, part of the material will move along the axial direction to form multiple first annular protrusions 22, and the radial moving of the main body 21 during the forming process is relatively uniform. Therefore, the radial deformation of the main body 21 after forming is relatively small, and the tolerance of the radial size of the main body 21 will not be too large. Based on this, the production quality of the pole 100 during mass production is relatively stable.

[0041] like Figure 1As shown in the figure, the column 1 includes a main body section 11 and an arc transition section 12 that are connected to each other along its axial direction. The arc transition section 12 is connected to the main body portion 21. The arc transition section 12 means that the connection between the column 1 and the main body portion 21 is transitioned through an arc, which can avoid stress concentration, make the structure of the terminal post 100 reliable, and at the same time, the arc transition is easier to feed during the forming process.

[0042] Among them, the main body section 11 is cylindrical, with a simple structure, which is convenient for installation in the following battery, and is also beneficial for riveting with the following conductor 40.

[0043] However, the orthographic projection of the main body portion 21 in its thickness direction is circular or elliptical, that is, the edge of the main body portion 21 of the base 2 is circular or elliptical. Due to the influence of forming tolerance, it is approximately circular or elliptical. Its structure is simple and stable, easy to process, and also convenient for installation in the following battery.

[0044] Based on the above terminal post 100, as Figures 3 to 7 shown, the present application also proposes a battery, which includes a housing 10, a winding core 20, an insulating member 30, and the terminal post 100 as above; the housing 10 has a first installation through hole 1001; the winding core 20 is arranged in the housing 10; the insulating member 30 seals the first installation through hole 1001, and the insulating member 30 has a second installation through hole 3001, and the axis of the second installation through hole 3001 is parallel to the axis of the first installation through hole 1001; the column 1 passes through the second installation through hole 3001, and the outer peripheral surface of the column 1 is in tight contact with the hole wall surface of the second installation through hole 3001, the base 2 is located in the housing 10, and the surface of the main body portion 21 facing the inside of the housing 10 is electrically connected to the winding core 20.

[0045] Since the above terminal post 100 is applied to this battery, the battery has the characteristic of stable production quality.

[0046] Among them, the material of the insulating member 30 can be one of fluororubber, ethylene propylene rubber, butyl rubber, nitrile rubber, polypropylene modified rubber, chlorinated nitrile rubber, chloroprene rubber, and isoprene rubber. The present application does not limit this, and it has good insulation performance and also has a certain elasticity.

[0047] Furthermore, the housing 10 is cylindrical. The first mounting through-hole 1001 is located at one end of the housing 10 along its axial direction, and the inner peripheral surface of the housing 10 defines the wall surface of the first mounting through-hole 1001. The position of the outer peripheral surface of the housing 10 close to the first mounting through-hole 1001 deflects towards the inside of the housing 10, forming a first annular groove 1002 around its axis on the outer peripheral surface of the housing 10, and a second annular protrusion 101 corresponding to the first annular groove 1002 is formed on the inner peripheral surface of the housing 10. The housing 10 defines the insulating member 30 into a cylinder, and the second annular protrusion 101 compresses the outer wall surface of the insulating member 30, so that a second annular groove 3002 is formed on the outer peripheral wall of the insulating member 30 around its axis. That is, the insulating member 30 is fixed at the first mounting through-hole 1001 of the housing 10 by a roll-grooving process. Since the insulating member 30 has a certain elasticity, the insulation can be stably arranged at the first mounting through-hole 1001 and seal the first mounting through-hole 1001. The battery with such a structure is simple in structure, convenient to process and has good sealing performance.

[0048] Furthermore, as Figure 3 , Figure 5 and Figure 7 shown, the battery further includes a conductor 40. The conductor 40 is fixedly connected to the end of the column 1 away from the base 2. Specifically, the column 1 and the conductor 40 are riveted and fixed, which is convenient for processing and has high connection stability. The conductor 40 is cylindrical, and its radial dimension is larger than that of the column 1. Thus, the battery has a conductive terminal with a larger radial dimension, which is beneficial to the output of current.

[0049] As Figure 6 shown, a first mounting groove 3003 and a second mounting groove 3004 are provided on the surface of the insulating member 30 facing away from the inside of the housing 10. The first mounting groove 3003 is annular, and the second mounting groove 3004 is located inside the first mounting groove 3003. The second mounting through-hole 3001 penetrates from the bottom surface of the second mounting groove 3004 to the surface of the insulating member 30 facing the inside of the housing 10; As Figure 3 and Figure 5As shown in the figure, the battery further includes a plate 50. The plate 50 is annular and is embedded in the first mounting groove 3003. The housing 10 is made of a conductive material. A part of the housing 10 located at the edge of the first mounting through-hole 1001 is folded towards the center to form an annular folded edge 102. The surface of the folded edge 102 facing the inside of the housing 10 is tightly pressed and attached to the surface of the insulating member 30 facing away from the winding core 20. And the folded edge 102 contacts the plate 50 and fixes the plate 50 on the insulating member 30. The plate 50 is electrically connected to the winding core 20 through the housing 10. The conductor 40 is embedded in the second mounting groove 3004. Specifically, the winding core 20 has a positive electrode and a negative electrode. Among them, the plate 50 is electrically connected to the positive electrode of the winding core 20, and the pole post 100 is electrically connected to the negative electrode of the winding core 20. That is, the plate 50 is the positive terminal of the battery, and the conductor 40 is the negative terminal of the battery. Thus, the positive and negative electrodes of the battery are arranged in the same direction. Therefore, when the battery is applied to the following battery pack, when using a bus bar to connect the batteries in series and parallel, the bus bar can be arranged on the same side of the battery (such as Figure 3 the top side of the battery shown), or can be arranged on the opposite sides of the battery (such as Figure 4 the top side and the bottom side of the battery shown). The structure is simple, the operation is simple, the bus bar is convenient to arrange and can be flexibly arranged according to the actual assembly situation.

[0050] Furthermore, as Figure 3 and Figure 5 shown, the plate 50 is provided with a third mounting through-hole 501 penetrating along its thickness direction. As Figure 5 and Figure 6 shown, the insulating member 30 further has a boss portion 301. The boss portion 301 is located on the bottom surface of the first mounting groove 3003 and passes through the third mounting through-hole 501. The insulating member 30 is further provided with a liquid injection hole 3010. The liquid injection hole 3010 penetrates from the surface of the boss portion 301 facing away from the bottom surface of the first mounting groove 3003 to the surface of the insulating member 30 facing the winding core 20. As Figure 5 shown, the battery further includes a sealing nail 60. The sealing nail 60 is sealingly inserted into the liquid injection hole 3010. In actual application, when the battery is produced, electrolyte is injected into the housing 10 through the liquid injection hole 3010, and then the liquid injection hole 3010 is sealed by the sealing nail 60. And based on the rubber material of the insulating member 30, the sealing nail 60 can seal the liquid injection hole 3010 by an interference fit method. The structure is simple, the installation is convenient, and the battery assembly efficiency is high.

[0051] In some embodiments, the interference fit for sealing the liquid injection hole 3010 can also have an explosion-proof function. When the air pressure in the housing 10 rises to a certain level, the sealing nail 60 can be pushed open to release pressure. And in some other embodiments, the battery can also release pressure by setting an explosion-proof valve. This application does not limit this.

[0052] Based on the above battery, the present application further provides a battery pack, which includes a box body and the battery as described above, and the battery is disposed in the box body.

[0053] Since the above battery is adopted in the battery pack, the battery pack has the characteristic of stable production quality.

[0054] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present utility model.

Claims

1. A pole, characterized in that: It comprises a column (1) and a base (2); The base (2) comprises a main body (21) and a first annular protrusion (22); the main body (21) is plate-shaped, and one surface of the main body (21) in the thickness direction is connected to the first annular protrusion (22); One end of the column (1) in the axial direction is connected to one surface of the main body (21) in the thickness direction, and the axial direction of the column (1) is parallel to the thickness direction of the main body (21); There are a plurality of first annular protrusions (22), and the plurality of first annular protrusions (22) are arranged around the column (1), and two adjacent first annular protrusions (22) are arranged at intervals.

2. The pole according to claim 1, characterized in that: The column (1) comprises a main body section (11) and a circular arc transition section (12) which are connected to each other along the axial direction thereof, and the circular arc transition section (12) is connected to the main body (21).

3. The pole according to claim 2, characterized in that: The main body section (11) is cylindrical.

4. The pole according to claim 1 or 3, characterized in that: The orthographic projection of the main body (21) in the thickness direction is circular or elliptical.

5. A battery, characterized in that: It comprises a shell (10), a winding core (20), an insulating member (30) and a pole (100) as claimed in any one of claims 1 to 4; The housing (10) has a first mounting through hole (1001); The winding core (20) is arranged in the housing (10); The insulating member (30) seals the first mounting through hole (1001), and the insulating member (30) has a second mounting through hole (3001), wherein the axis of the second mounting through hole (3001) is parallel to the axis of the first mounting through hole (1001); The column (1) passes through the second mounting through hole (3001), and the outer peripheral surface of the column (1) is in tight contact with the hole wall surface of the second mounting through hole (3001), the base (2) is located in the shell (10), and the main body (21) is conductively connected to the winding core (20) on a surface facing the inside of the shell (10).

6. The battery according to claim 5, characterized in that The shell (10) is cylindrical, the first mounting through hole (1001) is located at one end of the shell (10) along its axial direction, and the inner circumferential surface of the shell (10) defines a hole wall surface of the first mounting through hole (1001); The outer circumferential surface of the shell (10) is bent inwardly of the shell (10) at a position close to the first mounting through hole (1001), and a first annular groove (1002) is formed on the outer circumferential surface of the shell (10) around its axis, and a second annular protrusion (101) corresponding to the first annular groove (1002) is formed on the inner circumferential surface of the shell (10), the shell (10) defines the insulating part (30) as a cylinder, and the second annular protrusion (101) compresses the outer wall surface of the insulating part (30), so that the outer circumferential wall of the insulating part (30) forms a second annular groove (3002) arranged around its axis.

7. The battery according to claim 6, characterized in that It also includes a conductor (40), which is fixedly connected to an end of the column (1) away from the base (2).

8. The battery according to claim 7, characterized in that A first mounting groove (3003) and a second mounting groove (3004) are provided on a side of the insulating member (30) facing away from the inside of the housing (10); the first mounting groove (3003) is annular, the second mounting groove (3004) is located on the inner side of the first mounting groove (3003), and the second mounting through hole (3001) penetrates from the bottom surface of the second mounting groove (3004) to a side of the insulating member (30) facing the inside of the housing (10); The battery further comprises a pole plate (50), the pole plate (50) is annular, and the pole plate (50) is embedded in the first mounting groove (3003); The shell (10) is made of a conductive material, and a portion of the shell (10) located at the edge of the first mounting through hole (1001) is folded toward the center to form an annular folded edge (102), and a side of the folded edge (102) facing the inside of the shell (10) is pressed tightly against a side of the insulating member (30) facing away from the winding core (20), and the folded edge (102) is in contact with the electrode plate (50), and the electrode plate (50) is conductively connected to the winding core (20) through the shell (10); The conductor (40) is embedded in the second installation groove (3004).

9. The battery according to claim 8, characterized in that The electrode plate (50) is provided with a third mounting through hole (501) penetrating along the thickness direction thereof; The insulating member (30) further comprises a boss portion (301), the boss portion (301) being located on the bottom surface of the first mounting groove (3003) and passing through the third mounting through hole (501), and the insulating member (30) further comprises a liquid injection hole (3010), the liquid injection hole (3010) penetrating from a side of the boss portion (301) facing away from the bottom surface of the first mounting groove (3003) to a side of the insulating member (30) facing the winding core (20); The battery further comprises a sealing nail (60), wherein the sealing nail (60) is sealingly inserted into the liquid injection hole (3010).

10. A battery pack, characterized in that: It comprises a box and a battery as described in any one of claims 5 to 9, wherein the battery is arranged in the box.

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