Battery

Abstract

The utility model relates to the technical field of power batteries, and discloses a battery, which comprises a shell, a roll core, a cover plate, a first collector plate and a pole. The shell is provided with a cavity; the roll core is arranged in the cavity; the cover plate is connected with the shell and covers the cavity; the first collector plate is arranged between the cover plate and the roll core; the pole comprises an electrode part, an extension part and a buckling part; the electrode part abuts against the side, away from the first collector plate, of the cover plate, the extending part penetrates through the cover plate and is arranged between the electrode part and the buckling part, and the buckling part abuts against the side, close to the first collector plate, of the cover plate; and the buckling part is connected with the first collector plate. The electrode part and the buckling part are arranged on the pole, the electrode part and the buckling part oppositely abut against the two sides of the cover plate, and the pole is preassembled on the cover plate in a buckling mode, so that only the buckling part of the pole needs to be welded with the first collector plate in the battery assembly process, the welding step between the cover plate and the pole is not needed, the assembly procedures are reduced, and the battery assembly efficiency is improved. The assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and particularly to a battery. Background Art

[0002] A battery refers to a part of a cup, trough or other container or composite container that contains an electrolyte solution and metal electrodes to generate current, and is a device that can convert chemical energy into electrical energy. A current collector plate is an important component of a battery. The function of the current collector plate is to connect the tab of the wound core with the terminal, so that the wound core is electrically connected to the terminal to meet the flow of current.

[0003] In the assembly process of existing batteries, it is necessary to first weld and fix the current collector plate to the terminal, then weld the cover plate to the terminal, and finally fix the cover plate to the outer shell, so as to encapsulate and fix the current collector plate and the wound core in the outer shell. The assembly process is cumbersome and the assembly efficiency is poor. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is:

[0005] The assembly process is cumbersome and the assembly efficiency is poor.

[0006] In order to solve the above technical problems, the utility model provides a battery, including:

[0007] An outer shell having a cavity, and an opening of the cavity is provided at one end of the outer shell;

[0008] A wound core disposed in the cavity;

[0009] A cover plate connected to the outer shell, and the cover plate seals the cavity;

[0010] A first current collector plate disposed between the cover plate and the wound core, and the first current collector plate is electrically connected to the wound core; and

[0011] A terminal electrically connected to the first current collector plate; the terminal includes an electrode portion, an extension portion and a clamping portion; the electrode portion abuts against a side of the cover plate away from the first current collector plate, the extension portion passes through the cover plate, the extension portion is disposed between the electrode portion and the clamping portion, and the clamping portion abuts against a side of the cover plate close to the first current collector plate; the clamping portion is connected to the first current collector plate.

[0012] In one embodiment, a positioning block is provided on the clamping portion, and a positioning hole is provided on the first current collector plate; the positioning block is correspondingly inserted into the positioning hole.

[0013] In one embodiment, the battery further includes an insulating assembly; the insulating assembly includes a spacer and a sealing block; the spacer is clamped between the electrode portion and the cover plate; the sealing block is disposed around the outside of the extending portion, and the sealing block is disposed between the extending portion and the cover plate.

[0014] In one embodiment, an embedding groove is provided on the spacer, and the embedding groove is formed as a groove on a side of the spacer close to the electrode portion, and the electrode portion is embedded in the embedding groove.

[0015] In one embodiment, a cutting surface is provided on the electrode portion; the electrode portion is in a circular straight plate shape, the cutting surface is formed as a plane on one side of the electrode portion, and the shape of the embedding groove corresponds to that of the electrode portion to clamp the electrode portion and the spacer.

[0016] In one embodiment, a clamping block is provided on the spacer, and a clamping groove is provided on the cover plate; the clamping block protrudes on a side of the spacer close to the cover plate, the clamping groove is formed as a groove on a side of the cover plate close to the spacer, and the clamping block is correspondingly clamped into the clamping groove.

[0017] In one embodiment, the battery further includes a bonding block; the bonding block is disposed between the buckling portion and the cover plate, the buckling portion presses against the bonding block, the bonding block is a conductive member, and the bonding block is connected to the first current collector plate.

[0018] In one embodiment, the battery further includes an elastic seat; the elastic seat elastically supports between the bonding block and the cover plate.

[0019] In one embodiment, a liquid injection hole is provided on the cover plate, and a pressure relief valve is sealed on the liquid injection hole.

[0020] In one embodiment, the battery further includes a second current collector plate; the second current collector plate is disposed at an end of the core away from the first current collector plate, and the second current collector plate is electrically connected to the core.

[0021] Compared with the prior art, the beneficial effects of the above battery are as follows:

[0022] By providing an electrode portion and a buckling portion on the pole column, the electrode portion and the buckling portion are oppositely abutted on both sides of the cover plate, and the pole column is pre-installed on the cover plate by buckling, so that in the battery assembly process, only the buckling portion of the pole column needs to be welded to the first current collector plate, and the welding step between the cover plate and the pole column is not required, thereby reducing the assembly process and improving the assembly efficiency.

[0023] By providing positioning blocks and positioning holes on the crimping part, the positioning accuracy of the pole column and the first current collector plate during the welding process is ensured, the tilting of the current collector plate during the welding process is avoided, and the yield rate of the first welding assembly is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 1 is a schematic structural diagram of a battery according to an embodiment of the present invention;

[0025] Figure 2 is Figure 1 a schematic exploded view of the battery in FIG. 1;

[0026] Figure 3 is Figure 2 a schematic exploded view of the battery from another perspective in FIG. 1;

[0027] Figure 4 is Figure 1 a schematic structural diagram of the pole column in FIG. 1.

[0028] The meanings of the reference numerals in the drawings are as follows:

[0029] 100, battery;

[0030] 10, outer shell; 15, cavity;

[0031] 20, winding core;

[0032] 30, cover plate; 31, card slot; 35, liquid injection hole; 36, pressure relief valve;

[0033] 40, first current collector plate; 45, positioning hole;

[0034] 50, pole column; 51, electrode part; 515, section; 52, extension part; 53, crimping part; 535, positioning block;

[0035] 60, insulation assembly; 61, spacer; 611, locking block; 615, embedding groove; 62, sealing block;

[0036] 70, joint block;

[0037] 80, elastic seat;

[0038] 90, second current collector plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following provides a detailed description of the specific embodiments of the present utility model in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model.

[0041] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0042] In the present utility model, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0045] Please refer to Figures 1 to 4 , a battery 100 according to an embodiment of the present utility model, comprising a housing 10, a wound core 20, a cover plate 30, a first current collector plate 40 and a terminal 50. The housing 10 has a cavity 15, and an opening of the cavity 15 is provided at one end of the housing 10. The wound core 20 is disposed in the cavity 15. The cover plate 30 is connected to the housing 10, and the cover plate 30 seals the cavity 15 to form a relatively enclosed space for the cavity 15. The first current collector plate 40 is disposed between the cover plate 30 and the wound core 20, and the first current collector plate 40 is electrically connected to the wound core 20. The terminal 50 is electrically connected to the first current collector plate 40 to transmit the electric quantity of the wound core 20 to the outside and ensure the power supply; the terminal 50 includes an electrode portion 51, an extension portion 52 and a crimping portion 53; the electrode portion 51 abuts against a side of the cover plate 30 away from the first current collector plate 40, the extension portion 52 passes through the cover plate 30, the extension portion 52 is disposed between the electrode portion 51 and the crimping portion 53, and the crimping portion 53 abuts against a side of the cover plate 30 close to the first current collector plate 40; the crimping portion 53 is connected to the first current collector plate 40. By relatively abutting the electrode portion 51 and the crimping portion 53 on both sides of the cover plate 30, the terminal 50 is pre-mounted on the cover plate 30, and there is no need to perform a welding process between the terminal 50 and the cover plate 30 during the assembly process of the battery 100, thereby greatly improving the assembly efficiency and reducing the assembly cost.

[0046] Further, the outer shell 10 is arranged in a hollow cylindrical structure. The cavity 15 is in the shape of a cylindrical groove. The central axis of the cavity 15 is collinear with the central axis of the outer shell 10. The cavity 15 penetrates at least one side of the outer shell 10 in the direction of its central axis, and the cover plate 30 seals the cavity 15. In this embodiment, the cavity 15 penetrates the positive electrode side of the outer shell 10, that is, the opening of the cavity 15 is arranged at the positive electrode end of the outer shell 10; the outer shell 10 itself serves as the negative electrode of the battery 100.

[0047] Further, the winding core 20 is the core power supply and electricity storage component of the battery 100. The winding core 20 is wound by positive electrode plates and negative electrode plates (not shown in the figure) which are alternately stacked in sequence. A separator is arranged between the positive electrode plates and the negative electrode plates for insulation to prevent the positive electrode plates and the negative electrode plates from being conducted during the winding process and causing a short circuit. All the positive electrode plates are connected to the positive electrode of the battery 100 together, and all the negative electrode plates are connected to the negative electrode of the battery 100 together to form a current circulation loop.

[0048] Further, the cover plate 30 is arranged at the positive electrode position of the battery 100. The cover plate 30 is in the shape of a circular straight plate. The cover plate 30 seals the cavity 15 to prevent the electrolyte in the cavity 15 from leaking out. The cover plate 30 itself is an insulating part or the connection position between the cover plate 30 and the outer shell 10 is insulated to prevent the pole column 50 of the positive electrode from being conducted with the outer shell 10 of the negative electrode and causing a short circuit. In this embodiment, a liquid injection hole 35 is arranged on the cover plate 30. The liquid injection hole 35 is in the shape of a through hole. The liquid injection hole 35 is communicated with the cavity 15. The liquid injection hole 35 is used for injecting electrolyte into the cavity 15 during the assembly process of the battery 100. A pressure relief valve 36 is sealed on the liquid injection hole 35. The pressure relief valve 36 is in the shape of a straight plate and seals the liquid injection hole 35. The hardness of the pressure relief valve 36 is less than that of the cover plate 30. When the winding core 20 is short-circuited due to an external load during the operation of the battery 100, the pressure inside the cavity 15 will increase rapidly. The internal pressure of the cavity 15 can be reduced by the rupture of the pressure relief valve 36, thereby avoiding explosion and improving the safety performance of the battery 100 during use.

[0049] Further, the first current collector plate 40 is connected to the tabs of the positive electrode plates of the winding core 20. The first current collector plate 40 is a conductive part to connect the pole column 50 with the positive electrode plates of the winding core 20. In this embodiment, a positioning hole 45 is arranged on the first current collector plate 40. The positioning hole 45 is in the shape of a circular through hole and is arranged at one end of the first current collector plate 40. A positioning block 535 is arranged on the buckling part 53. The positioning block 535 is in the shape of a circular convex block and extends from the buckling part 53 towards the first current collector plate 40. The positioning block 535 is correspondingly inserted into the positioning hole 45 to position between the pole column 50 and the first current collector plate 40 during the assembly process of the battery 100, ensure the positioning accuracy of the first current collector plate 40 during the welding process, and further improve the yield rate of welding the pole column 50 and the cover plate 30 on the first current collector plate 40 together.

[0050] Further, the terminal post 50 is the positive electrode of the battery 100, and the terminal post 50 is a conductive member. The electrode portion 51 is arranged in a circular straight plate shape on the side of the cover plate 30 away from the first current collector plate 40. The electrode portion 51 is exposed outside the battery 100 to communicate with the outside. The extension portion 52 is in a cylindrical shape and extends from the electrode portion 51 towards the inside of the cavity 15. The extension portion 52 passes through the cover plate 30. The clamping portion 53 is arranged at one end of the extension portion 52 away from the electrode portion 51. The clamping portion 53 is in a circular straight plate shape and is electrically connected to the first current collector plate 40. It can be understood that in order to ensure that the terminal post 50 is pre-installed on the cover plate 30, at least part of the electrode portion 51 and the clamping portion 53 protrude outside the extension portion 52 to ensure that the electrode portion 51 and the clamping portion 53 are relatively abutted on both sides of the cover plate 30.

[0051] Further, the battery 100 further includes an insulating assembly 60. The insulating assembly 60 is blocked between the terminal post 50 and the cover plate 30 to improve the reliability of insulation between the positive and negative electrodes of the battery 100. The insulating assembly 60 includes a cushion block 61 and a sealing block 62. The cushion block 61 is clamped between the electrode portion 51 and the cover plate 30. The electrode portion 51 abuts against the side of the cushion block 61 away from the cover plate 30. The cushion block 61 is used to insulate between the electrode portion 51 and the cover plate 30 and improve the bearing strength of the electrode portion 51 at the same time. The sealing block 62 is arranged around the outside of the extension portion 52. The sealing block 62 is arranged between the extension portion 52 and the cover plate 30. The sealing block 62 passes through the cover plate 30. The sealing block 62 is used to insulate between the extension portion 52 and the cover plate 30 and improve the bearing strength of the extension portion 52 at the same time. In this embodiment, the cross-section of the sealing block 62 is in a T shape. One end of the sealing block 62 abuts against the side of the cover plate 30 away from the electrode portion 51, and the other end of the sealing block 62 passes through the cover plate 30 and abuts against the cushion block 61 to improve the sealing performance at the joint position of the terminal post 50 and the cover plate 30 and further avoid the leakage of the electrolyte.

[0052] Further, an embedding groove 615 is arranged on the cushion block 61. The embedding groove 615 is arranged in a groove shape on the side of the cushion block 61 close to the electrode portion 51. The electrode portion 51 is embedded in the embedding groove 615. By wrapping the side of the electrode portion 51 with the cushion block 61, the bearing performance of the electrode portion 51 is improved. In this embodiment, a cut surface 515 is arranged on the electrode portion 51. The electrode portion 51 is in a circular straight plate shape, and the cut surface 515 is arranged in a planar shape on one side of the electrode portion 51. By arranging the cut surface 515, the electrode portion 51 presents an irregular shape. The shape of the embedding groove 615 corresponds to that of the electrode portion 51 to clamp the electrode portion 51 and the cushion block 61, thereby avoiding relative rotation between the electrode portion 51 and the cushion block 61 and improving the torsional resistance of the electrode portion 51.

[0053] Further, a clamping block 611 is provided on the cushion block 61, and a clamping groove 31 is provided on the cover plate 30. The clamping block 611 protrudes from the side of the cushion block 61 close to the cover plate 30. The clamping groove 31 is arranged in a groove shape on the side of the cover plate 30 close to the cushion block 61. The shape and size of the clamping groove 31 are the same as those of the clamping block 611. The clamping block 611 is correspondingly clamped into the clamping groove 31 to clamp the cushion block 61 on the cover plate 30, thereby improving the torsional resistance between the cushion block 61 and the cover plate 30. By embedding the electrode part 51 into the embedding groove 615 and preventing the electrode part 51 from rotating relative to the cushion block 61, and by the clamping block 611 and the clamping groove 31 to prevent the cushion block 61 from rotating relative to the cover plate 30, the connection reliability of pre-installing the pole column 50 on the cover plate 30 is improved.

[0054] Further, the battery 100 further includes a bonding block 70. The bonding block 70 is arranged between the buckling part 53 and the cover plate 30. The buckling part 53 presses against the bonding block 70. The bonding block 70 is a conductive part. The bonding block 70 is sleeved around the outer side of the extension part 52 in a ring shape. The bonding block 70 is connected to the first current collector plate 40. The structure of the bonding block 70 improves the welding reliability between the pole column 50 and the first current collector plate 40, ensuring the stability of power transmission of the battery 100. In this embodiment, the bonding block 70 is clamped between the sealing block 62 and the buckling part 53.

[0055] Further, the battery 100 further includes an elastic seat 80. The elastic seat 80 is a rubber part. The elastic seat 80 elastically supports between the bonding block 70 and the cover plate 30. The elastic seat 80 is used to tighten and fix the pole column 50 on the cover plate 30, ensuring the reliability of pre-installing the pole column 50 on the cover plate 30. At the same time, through the elastic deformation of the elastic seat 80, the assembly tolerance of pre-installing the pole column 50 on the cover plate 30 is absorbed, and the assembly tolerance between the winding core 20 and the first current collector plate 40 during the assembly process of the battery 100 can also be absorbed, thereby ensuring the yield rate of the battery 100 assembly.

[0056] Further, the battery 100 further includes a second current collector plate 90. The second current collector plate 90 is arranged at one end of the winding core 20 away from the first current collector plate 40. The second current collector plate 90 is electrically connected to the winding core 20. The second current collector plate 90 is arranged at the negative electrode of the battery 100. The second current collector plate 90 is connected to the tab of the negative electrode plate of the winding core 20, and the second current collector plate 90 is connected to the outer shell 10, thereby connecting the negative electrode plate of the winding core 20 to the outer shell 10 to form the negative electrode of the battery 100.

[0057] In summary, the embodiment of the present invention provides a battery 100, and its beneficial effects are as follows:

[0058] By providing an electrode portion 51 and a clamping portion 53 on the terminal post 50, the electrode portion 51 and the clamping portion 53 are oppositely abutted on both sides of the cover plate 30, and the terminal post 50 is pre-installed on the cover plate 30 by clamping. Then, during the assembly process of the battery 100, only the clamping portion 53 of the terminal post 50 needs to be welded to the first current collector plate 40, and there is no need for the welding step between the cover plate 30 and the terminal post 50, thus reducing the assembly process and improving the assembly efficiency.

[0059] By providing a positioning block 535 and a positioning hole 45 on the clamping portion 53, the positioning accuracy of the terminal post 50 and the first current collector plate 40 during the welding process is ensured, the current collector plate is prevented from tilting during the welding process, and the yield rate of the first welding assembly is guaranteed.

[0060] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0061] The above-described embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A battery, characterized in that, Comprising: A housing having a cavity, the opening of the cavity being provided at one end of the housing; A core roll disposed within the cavity; A cover plate connected to the housing, the cover plate sealing the cavity; A first current collector plate disposed between the cover plate and the core roll, the first current collector plate being electrically connected to the core roll; And A terminal post electrically connected to the first current collector plate; the terminal post includes an electrode portion, an extension portion, and a crimping portion; the electrode portion abuts against a side of the cover plate away from the first current collector plate, the extension portion passes through the cover plate, the extension portion is disposed between the electrode portion and the crimping portion, and the crimping portion abuts against a side of the cover plate close to the first current collector plate; the crimping portion is connected to the first current collector plate.

2. The battery according to claim 1, wherein A positioning block is provided on the crimping portion, and a positioning hole is provided on the first current collector plate; the positioning block is correspondingly inserted into the positioning hole.

3. The battery according to claim 1, wherein The battery further includes an insulating assembly; the insulating assembly includes a cushion block and a sealing block; the cushion block is clamped between the electrode portion and the cover plate; the sealing block is disposed around the outside of the extension portion, and the sealing block is disposed between the extension portion and the cover plate.

4. The battery according to claim 3, characterized in that, An embedding groove is provided on the cushion block, the embedding groove is provided in a groove shape on a side of the cushion block close to the electrode portion, and the electrode portion is embedded in the embedding groove.

5. The battery according to claim 4, characterized in that, A cutting surface is provided on the electrode portion; the electrode portion is in a circular straight plate shape, the cutting surface is provided in a flat shape on one side of the electrode portion, and the shape of the embedding groove corresponds to that of the electrode portion to engage the electrode portion with the cushion block.

6. The battery according to claim 3, characterized in that, A clamping block is provided on the cushion block, and a clamping groove is provided on the cover plate; the clamping block protrudes from a side of the cushion block close to the cover plate, the clamping groove is provided in a groove shape on a side of the cover plate close to the cushion block, and the clamping block is correspondingly clamped into the clamping groove.

7. The battery according to claim 1, characterized in that, The battery further includes a bonding block; the bonding block is disposed between the crimping portion and the cover plate, the crimping portion presses against the bonding block, the bonding block is a conductive member, and the bonding block is connected to the first current collector plate.

8. The battery according to claim 7, characterized in that, The battery further includes an elastic seat; the elastic seat elastically supports between the bonding block and the cover plate.

9. The battery according to claim 1, characterized in that, A liquid injection hole is provided on the cover plate, and a pressure relief valve is sealed on the liquid injection hole.

10. The battery according to claim 1, wherein The battery further includes a second current collector plate; the second current collector plate is disposed at an end of the core roll away from the first current collector plate, and the second current collector plate is electrically connected to the core roll.

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