CN214477791U

CN214477791U - Battery controller and rechargeable battery thereof

Info

Publication number: CN214477791U
Application number: CN202120685887.8U
Authority: CN
Inventors: 姚茂聪; 孔祥权; 靳体航
Original assignee: Shenzhen Maigesong Electrical Technology Co ltd
Current assignee: Guangdong Meini Magson Power System Co ltd
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2021-10-22
Anticipated expiration: 2031-04-01

Abstract

The present disclosure discloses a battery controller and a rechargeable battery thereof, wherein the rechargeable battery comprises a cylindrical battery shell, a battery core arranged in the battery shell and a battery controller. The battery controller includes a controller housing, a circuit board, an inner electrode, and a crimp tab assembly. The controller housing is made of an electrically conductive material. The circuit board comprises a first surface and a second surface which are oppositely arranged, an electrode cap is arranged on the first surface, and a circuit component is welded on the second surface. The inner electrode is columnar and is welded on the second surface of the circuit board. The crimping piece assembly is arranged in the controller shell and comprises an inner electrode crimping piece connected with the inner electrode and an insulator, the inner electrode crimping piece comprises a crimping piece body and a crimping part connected to the crimping piece body and protruding out of the crimping piece body along the direction back to the inner electrode, and the outer edge of the insulator protrudes out of the outer edge of the crimping piece body to insulate the controller shell from the inner electrode crimping piece.

Description

Battery controller and rechargeable battery thereof

Technical Field

The present disclosure relates to the field of secondary battery technologies, and in particular, to a battery controller and a rechargeable battery thereof.

Background

The current lithium ion rechargeable battery is generally packaged by integrating a discharge control circuit or a charge-discharge control circuit and a DC-DC converter circuit into a battery controller, and then packaging the battery controller and a lithium ion battery cell into a whole to form the lithium ion rechargeable battery. The battery controller is stacked at the positive end or the negative end of the lithium ion cell, and the electrode of the lithium ion cell and the circuit board in the battery controller are electrically connected through the inner electrode.

At present, a long-strip-shaped nickel strip is generally adopted as an inner electrode, and the circuit board of the battery controller is electrically connected with a lithium ion battery cell. However, before the strip-shaped inner electrode is welded with the cell electrode, the strip-shaped inner electrode needs to be pulled apart manually, high-temperature insulating gummed paper needs to be wrapped manually, and a piece of highland barley paper is attached to the controller, so that short circuit is prevented, and the mode has many processes and affects the production efficiency.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems that the welding connection of the inner electrode and the cell electrode in the related art requires multiple processes and the production efficiency is low, the present disclosure provides a battery controller and a rechargeable battery thereof, which can reduce the processes and improve the production efficiency.

The present disclosure provides a battery controller, comprising:

a controller housing made of a conductive material;

the circuit board is arranged in the controller shell and comprises a first surface and a second surface which are oppositely arranged, the first surface is provided with an electrode cap, and the second surface is welded with a circuit component;

the inner electrode is columnar and is welded on the second surface of the circuit board; and

the crimping piece assembly is installed in the controller shell and comprises an inner electrode crimping piece and an insulator, wherein the inner electrode crimping piece is connected with the inner electrode, the inner electrode crimping piece comprises a crimping piece body and a crimping portion connected to the crimping piece body and protruding in the inner electrode direction along the back direction, the outer edge of the insulator protrudes out of the outer edge of the crimping piece body, and the controller shell is insulated from the inner electrode crimping piece.

Optionally, the insulator is an insulating plate, the inner electrode crimping piece is arranged on one side of the insulating plate, which is away from the circuit board, and the outer contour of the insulating plate protrudes outwards from the outer contour of the crimping piece body;

the insulating plate is provided with a through hole for the inner electrode to penetrate through, and the inner electrode pressing connection piece is partially exposed out of the through hole so as to be connected with the inner electrode pressing connection piece.

Optionally, the insulator is an insulating ring clamped or bonded to the periphery of the inner electrode pressure contact piece;

the crimping piece body is connected with the inner electrode.

Optionally, the crimping piece body is provided with a hole, one end edge of the crimping portion is connected with the edge of the hole, and the crimping portion is sheet-shaped and forms an inner concave surface facing the crimping piece body, so that the crimping portion can make surface contact with a battery core electrode of a battery.

Optionally, the other end edge of the crimping portion is disconnected from the crimping piece body.

Optionally, the crimping portion is arched, trapezoidal, arc-shaped or semicircular.

Optionally, notches are formed in two sides of the insulating plate, a position, corresponding to the notch, of the crimping piece body of the inner electrode crimping piece is provided with a limiting convex edge, and the limiting convex edge is clamped on the edge of the notch to achieve positioning of the insulating plate.

Optionally, the insulation board is provided with a limiting hole, a position of the crimping piece body of the inner electrode crimping piece corresponding to the limiting hole is provided with a limiting convex edge, and the limiting convex edge is clamped into the limiting hole to realize positioning with the insulation board.

Optionally, a pad is further disposed on the insulating plate.

Optionally, the inner electrode is a solid cylindrical body, and the inner electrode is located at a position far from the center of the circuit board.

Optionally, the inner electrode crimping piece is an elastic metal piece.

The utility model provides a rechargeable battery in addition, include cylindric battery case body, install electric core and foretell battery controller in the battery case body, the electric core electrode of a tip naked exposure of battery case body, battery controller is located the battery case body a tip, battery controller's internal electrode crimping piece with electric core electrode connects, battery controller's controller casing with battery case body connects, the battery case body with another electric core electrode of electric core connects.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the present disclosure provides a battery controller including a controller housing, a circuit board, an inner electrode, and a crimp tab assembly. The controller housing is made of an electrically conductive material. The circuit board comprises a first surface and a second surface which are oppositely arranged, an electrode cap is arranged on the first surface, and a circuit component is welded on the second surface. The inner electrode is columnar and is welded on the second surface of the circuit board. The crimping piece assembly is arranged in the controller shell and comprises an inner electrode crimping piece connected with the inner electrode and an insulator, the inner electrode crimping piece comprises a crimping piece body and a crimping part connected to the crimping piece body and protruding out of the crimping piece body along the direction back to the inner electrode, and the outer edge of the insulator protrudes out of the outer edge of the crimping piece body to insulate the controller shell from the inner electrode crimping piece. Because interior electrode crimping piece includes crimping piece body and connects on crimping piece body and along the crimping portion of the outstanding crimping piece body of the interior electrode orientation of carrying on the back, so, when battery controller encapsulates with electric core, this crimping portion can tightly press through the structural feature of self and carry out the contact connection on electric core electrode, consequently interior electrode crimping piece compares with traditional long banding nickel area, need not artifically pull open the back welding connection again behind the nickel area, thereby the process has been reduced, the production efficiency is improved. In addition, the battery controller is further provided with an insulator, the outer edge of the insulator protrudes out of the outer edge of the crimping piece body, so that the procedures of wrapping high-temperature insulating gummed paper and pasting highland barley paper are reduced through the arrangement of the insulator, and the production efficiency is improved.

The utility model provides a rechargeable battery, it includes cylindric battery case body, installs electric core and foretell battery controller in the battery case body, the electric core electrode that a tip of battery case body exposes, and battery controller is located a tip of battery case body, and battery controller's internal electrode crimping piece and electric core electrode connection, battery controller's controller casing and battery case body coupling, battery case body and another electric core electrode connection of electric core. The rechargeable battery of the present disclosure adopts the above battery controller, which reduces the processes and improves the production efficiency. In addition, the battery controller is further provided with the insulator, the outer edge of the insulator protrudes out of the outer edge of the crimping piece body, and therefore through the arrangement of the insulator, the procedures of wrapping high-temperature insulating gummed paper and pasting highland barley paper are reduced, and the production efficiency is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is an exploded schematic diagram illustrating a battery controller in accordance with an exemplary embodiment.

Fig. 2 is a schematic diagram illustrating a configuration of a circuit board assembly of a battery controller according to an exemplary embodiment.

Fig. 3 is a partial exploded view of the circuit board assembly.

Fig. 4 is a schematic diagram illustrating a configuration of a crimping tab assembly of a battery controller according to an exemplary embodiment.

Fig. 5 is an exploded view of a crimp tab assembly.

Fig. 6 is a schematic cross-sectional view of an assembled battery controller.

FIG. 7 is a schematic view of one side of a crimp tab assembly shown in accordance with another exemplary embodiment.

FIG. 8 is a schematic view of another face of a crimp sheet assembly shown in accordance with another exemplary embodiment.

Fig. 9 is a schematic view of an insulation plate of a crimp tab assembly shown according to another exemplary embodiment.

FIG. 10 is a block diagram illustrating a crimp tab assembly according to yet another exemplary embodiment.

FIG. 11 is a cross-sectional view of the crimping tab assembly shown in FIG. 10 taken along the direction H-H.

Fig. 12 is a schematic diagram illustrating a structure of a rechargeable battery according to an exemplary embodiment.

Fig. 13 is an exploded schematic view of a rechargeable battery according to an exemplary embodiment.

Detailed Description

For further explanation of the principles and construction of the present disclosure, reference will now be made in detail to the preferred embodiments of the present disclosure, which are illustrated in the accompanying drawings.

As mentioned above, in the conventional technology, the inner electrode generally adopts a long-strip-shaped nickel strip, so as to realize the connection between the battery controller and the battery core. From the self structure of the nickel belt inner electrode, the die is complex to process, is sensitive to the fatigue strength of the material in the assembling process and is easy to break; from the process perspective, the strip-shaped inner electrodes and the circuit board cannot be pasted and can only be welded manually, the requirement on the operation level of workers is high, manual welding is adopted, the consistency of products is difficult to guarantee, the working procedure consumes more time, the productivity is seriously affected, and the labor cost is high; from the connection condition with the electric core electrode, the strip-shaped inner electrode needs to be well insulated, the inner electrode needs to be wrapped with high-temperature insulating gummed paper, and the controller needs to be attached with a piece of highland barley paper, so that short circuit is prevented, and the number of procedures is increased again.

Therefore, in view of the above problems, the present disclosure provides a battery controller, in which an inner electrode is cylindrical, a mold is simply processed, and the inner electrode has high strength and is not easily broken. The welding between the columnar inner electrode and the circuit board can adopt an automatic welding mode, such as patch welding, so that the labor cost can be obviously reduced, and the production efficiency is improved. The internal electrode crimping piece has along the salient crimping portion in crimping piece body of the internal electrode direction of dorsad, when battery controller encapsulates with electric core, this crimping piece can tightly press on electric core electrode through the structural feature of self, consequently the internal electrode crimping piece is compared with traditional long banding nickel strap, need not artifically pull open back behind the nickel strap welding connection again to reduce welding process, improve production efficiency. The battery controller is further provided with the insulator, the outer edge of the insulator protrudes out of the outer edge of the crimping piece body, and the procedures of wrapping high-temperature insulating adhesive paper and pasting highland barley paper are reduced through the arrangement of the insulator, so that the production efficiency is improved.

First embodiment of battery controller

Specifically, as shown in fig. 1, the present disclosure provides a battery controller 3, the battery controller 3 including a controller case 31, a press contact piece assembly 32, a circuit board assembly 33, and a light guide assembly 34. A crimping piece assembly 32 and a circuit board assembly 33 are mounted within the controller housing 31.

The controller case 31 is cylindrical and made of a metal material. The aperture of the controller housing 31 is larger than the diameter of the circuit board assembly 33. The controller case 31 includes an outer case body 311 and a baffle 312 provided at one end portion of the outer case body 311 and perpendicular to an axis of the outer case body 311. The other end of the outer housing 311 is provided with a pressure relief groove 313 for pressure relief. The number and position of the pressure relief grooves 313 can be adjusted according to actual requirements. Optionally, the number of the pressure relief grooves is four, and the pressure relief grooves are uniformly arranged along the end portion of the controller housing 31, so that gas in the battery controller is discharged in time, and the internal pressure of the battery is reduced. The stop plate 312 serves to limit axial movement of the circuit board assembly 33 within the controller housing 31. The inner diameter of the shield 312 is smaller than the diameter of the circuit board assembly 33, so that the circuit board 331 is restrained.

As shown in fig. 2 and 3, the circuit board assembly 33 includes a circuit board 331, an electrode cap 332 on a first surface of the circuit board 331, and a cylindrical inner electrode 333 on a second surface of the circuit board 331. The periphery of the first surface of the circuit board 331 is provided with a housing pad (or the peripheries of the first surface and the second surface are both provided with a housing pad), and the circuit board 331 is connected to the controller housing 31 through the housing pad. The inner electrodes 333 are located at positions away from the center of the circuit board 331, i.e., side positions. More space can be reserved for the center position of the circuit board 331 so as to weld other components. The inner electrode 333 is a solid cylinder, so that the inner electrode 333 can be soldered to the second surface by means of a patch, and the inner electrode 333 is made of a material with stable structural properties, such as brass.

As shown in fig. 4 and 5 in conjunction, the crimping piece assembly 32 includes the inner electrode crimping pieces 322 and an insulator. The insulator may be an insulating plate and the inner electrode crimping piece 322 is disposed on a side of the insulating plate facing away from the circuit board. The insulating board is also provided with a bonding pad, and the second circuit board can be selected to replace the insulating board corresponding to the insulating board provided with the bonding pad. The inner electrode pressing piece 322 is connected to the insulating plate 321 through the pad. The insulating plate 321 is substantially circular, and notches 3212 are formed at both sides thereof. The insulating plate 321 is provided with a through hole 3211 through which the inner electrode 333 passes at a position corresponding to the inner electrode 333. After each part combination of battery controller 3 was accomplished, can follow the both sides notch 3212 position injection heat conduction glue of insulation board 321, conduct heat, make battery controller have good heat conduction effect, heat conduction glue is filled to being in same horizontal plane with insulation board 321, heat conduction glue can be the hot melt adhesive, the hot melt adhesive has good mobility, can guarantee to flow smoothly and fill whole battery controller, and there is good limiting displacement to the circuit board, the hot melt adhesive is after the low temperature cooling, wholly soft, it is convenient to clear up.

The insulating plate 321 has a through hole 3211 for the inner electrode 333 to pass through. The insulating plate 321 has a diameter smaller than the inner diameter of the outer case body 311.

The inner electrode crimping piece 322 is provided on one surface of the insulating plate 321. The inner electrode crimping piece 322 is an elastic metal sheet, which may be welded to the insulating plate 321 by means of a patch.

The inner electrode crimping piece 322 includes a crimping piece body 3222 and a crimping portion 3221. The crimp tab body 3222 is fixed to the insulating plate 321, and an outer edge of the insulating plate 321 protrudes beyond an outer edge of the crimp tab body 3222. The crimp piece body 3222 is fixedly connected to the insulating plate 321. A portion of the pressing piece body 3222 is exposed to the through hole 3211 of the insulating plate 321, so that the pressing piece body 3222 is connected to the inner electrode. An opening 3224 is opened at the middle of the pressing piece body 3222. One end of the pressing portion 3221 is connected to the edge of the hole 3224. The crimping portion 3221 is sheet-shaped and protrudes in a direction away from the inner electrode 333, and is curved to form an inner concave surface facing the crimping sheet body 3222, so that the crimping portion 3221 can make surface contact with a cell electrode of a battery. The other end of the crimping portion 3221 is disconnected from the crimping piece body 3222, i.e., is a freely movable end. Alternatively, the other end side of the crimping portion 3221 may be exposed to the through hole 3211 of the insulating plate 321, so that the other end side of the crimping portion 3221 is connected to the inner electrode 333. After the battery controller and the battery core are sealed, the tail of the movable end of the crimping portion 3221 is naturally stressed to be in contact with the inner electrode, so that the connection area is increased, and the capacity of overlarge current is improved. When the battery controller is packaged with the battery cell, the battery cell electrode presses the pressing part 3221, so that the pressing part 3221 is in close contact with the battery cell electrode, the contact area is increased, and the stability is enhanced. This openly through the mode that inner electrode and inner electrode crimping piece two parts and electric core electrode were established and are connected has good stability, can better avoid the emergence of the short circuit condition.

The position of the crimp piece body 3222 of the inner electrode crimp piece 322 corresponding to the notch is provided with a limiting convex edge 3223, and the limiting convex edge 3223 is clamped on the edge of the notch 3212 to limit the inner electrode crimp piece 322 at a predetermined position of the insulating plate 321, thereby realizing the positioning with the insulating plate 321. Notches on two sides of the insulating plate 321 are used for adapting to the shape of the inner electrode pressing connection piece 322, the limiting convex edge 3223 is clamped on the edge of the notch 3212 to limit the freedom degree of the inner electrode pressing connection piece 322 in two directions, and the structural stability of the insulating plate 321 and the inner electrode pressing connection piece 322 is improved.

The inner electrode crimping piece 322 is made of a metal material having good elasticity. Optionally, the material is made of phosphor copper. The crimping portion 3221 of the inner electrode crimping piece 322 has an arch shape, a trapezoid shape, an arc shape or a semicircular shape. When the pressing portion 3221 of the inner electrode pressing piece 322 is designed in a shape of an arch, an arc, a semicircle, or the like, the deformation is within the elastic deformation range thereof, and the natural recovery is possible after the force is removed. The surface of the inner electrode crimping piece 322 is provided with a round hole, after the patch is welded, solder paste can climb up from the round hole, a limiting effect is achieved on the inner electrode crimping piece 322, and the inner electrode crimping piece 322 is prevented from drifting when the patch is welded.

Since the inner electrode 333 is cylindrical, the inner electrode 333 can be automatically soldered to the circuit board 331 by means of a chip or the like. Since the inner electrode crimping pieces 322 are fixed to the insulating plate 321, the inner electrode 333 and the inner electrode crimping pieces 322 can be automatically positioned during installation, and the crimping portion 3221 can be connected to the cell electrode by contact.

As shown in fig. 3 and 6, an indicator light 334 is disposed on the first surface of the circuit board 331, and in particular, the indicator light 334 is disposed at a central position of the first surface of the circuit board 331. The electrode cap 332 may be soldered to the first surface of the circuit board 331 by means of a patch. The cap body of the electrode cap 332 is provided with light holes 3321, the light holes 3321 are uniformly distributed along the cap body, and light of the indicator light 34 can be emitted through the light holes 3321. Electronic components related to the circuit are distributed on the second surface, each component is provided with a corresponding bonding pad, solder paste is coated during chip mounting, and the components can be fixed after the components are welded in a reflow oven. Furthermore, the soldering method is various and is not limited to reflow soldering. When the chip is pasted, the corresponding component on each bonding pad position of the circuit is placed, and therefore the whole control circuit is formed.

As shown in fig. 1, the light guide assembly 34 includes a light guide ring 341 and a light shielding sheet 342, the light guide ring 341 is used for guiding light and condensing light, one side of the light guide ring 341 has a back adhesive, so that the light guide ring 341 can be attached to the baffle 312 of the controller housing 31, specifically, the light guide ring 341 can be a PC light diffusion film. The light shielding sheet 342 is disposed above the light guide ring 341 to shield light above the light guide ring 341 and ensure that the light is emitted from the side surface of the light guide ring 341. The thickness of the light guide assembly 34 is greater than or equal to the height of the light transmissive holes.

Second embodiment of battery controller

Referring to fig. 7, 8 and 9, the main difference of the controller of the present embodiment from the first embodiment described above is the structure of the crimping piece assembly 32 a.

Specifically, the crimping piece assembly 32a includes: an insulating plate 321a and an inner electrode crimping piece 322 a. The insulating plate 321a may be a plastic plate, which has a certain high temperature resistance to meet the requirement of high temperature glue injection of the controller. The insulating plate 321a has a substantially circular shape and a diameter smaller than the inner diameter of the controller case. The insulating plate 321a is provided with a through hole 3211a for the inner electrode to penetrate therethrough. The insulating plate 321a is further provided with two limiting holes 3212 a.

The inner electrode crimping piece 322a has the same structure as the above-described embodiment, and includes a crimping piece body 3222a and a crimping portion 3221a protruding from the crimping piece body 3222 a. A part of the pressure contact piece body 3222a is exposed to the through hole 3211a of the insulating plate 321, so that the part of the pressure contact piece body 3222a can be connected to the inner electrode penetrating through the through hole 3211 a. The pressure bonding portion 3221a has one end suspended and the other end connected to the pressure bonding piece body 3222 a. One end of the pressure-connecting portion 3221a suspending in the air may extend to the through hole 3211 a. The crimping portion 3221a is curved into an arc shape, and forms an inner concave surface toward the crimping sheet body 3222a to make effective elastic contact with the battery cell. In other embodiments, the crimping portion 3221a may also be semicircular, trapezoidal, arc-shaped, arched, or the like. The inner electrode compression joint piece 322a is made of an elastic material, when the battery controller is packaged with the battery core, the battery core electrode presses the compression part 3221, so that the compression part 3221a is in close contact with the battery core electrode, the contact area is increased, and the stability is enhanced.

The pressing piece body 3222a of the inner electrode pressing piece 322a is provided with two limiting convex edges 3223a, and the two limiting convex edges 3223a are respectively and correspondingly clamped into the two limiting holes 3212a of the insulating plate 321a to realize positioning with the insulating plate 321 a.

The surface of the inner electrode crimping piece 322a is provided with a round hole, after the patch is welded, solder paste can climb up from the round hole, a limiting effect is played on the inner electrode crimping piece 322a, and the inner electrode crimping piece 322a is prevented from drifting when the patch is attached. The outer contour of the insulating plate 321a protrudes outward beyond the outer contour of the crimp tab body 3222a, so that the crimp tab assembly 32a is insulated from the controller housing when mounted in the controller housing, thereby ensuring reliable insulation between the inner electrode crimp tab 322a and the inner electrode and the controller housing.

Third embodiment of controller

Referring to fig. 10 and 11, the controller of the present embodiment is different from the above-described first embodiment in that the insulating plate 321 is removed from the crimping piece assembly 32b of the present embodiment, and instead, an insulating ring 3224b is provided on the outer circumference of the inner electrode crimping pieces 322b, and accordingly, the structure of the inner electrode crimping pieces 322b is slightly different.

Specifically, the crimping piece assembly includes: an inner electrode crimping piece 322b and an insulating ring 3224b disposed at the outer circumference of the inner electrode crimping piece 322 b. The insulating ring 3224b is snap-fitted or adhered to the outer circumference of the inner electrode crimping piece 322 b. The inner electrode crimping piece 322b includes a round crimping piece body 3222b and a crimping portion 3221b bent in a direction away from the inner electrode with respect to the crimping piece body 3222 b. The crimp piece body 3222b is directly connected to the inner electrode. Since the inner electrodes are cylindrical and have a high height with respect to other components on the second surface of the circuit board, when the pressing piece body 3222b is connected to the inner electrodes, an appropriate insulation distance is left between the other components on the second surface of the circuit board and the pressing piece body 3222b, so that insulation between the pressing piece body 3222b and the circuit board can be maintained even if no insulating plate is provided between the pressing piece body 3222b and the second surface of the circuit board. The structure of the pressure bonding portion 3221b is the same as the two embodiments described above, and is not described here. The insulating ring 3224b may be provided with a snap groove to allow the circular periphery of the crimp tab body 3222b to snap fit within the insulating ring 3224 b. The insulating ring 3224b is used to ensure that the inner electrode crimping piece 322b is insulated from the controller housing when mounted in the controller housing, thereby ensuring reliable insulation of the inner electrode crimping piece 322b and the inner electrode from the controller housing.

Rechargeable battery

As shown in fig. 12 and 13, the present disclosure also provides a rechargeable battery 100 including a cylindrical battery case 1, a battery cell mounted in the battery case, and the battery controller 3 in any of the above embodiments. A cell electrode exposed at one end of the battery case 1, and the battery controller 3 is located at the one end of the battery case 1. The inner electrode crimping pieces 322 of the battery controller 3 are connected to the cell electrodes. The controller casing of the battery controller 1 is connected with the battery casing body 1, and the battery casing body 1 is connected with the other battery cell electrode of the battery cell. The periphery of the cell electrode is sleeved with an insulating pad 2 for isolating the connection between the cell electrode connected with the inner electrode crimping piece 322 and the controller shell.

The end of the battery controller 3 stacked on the battery core may be a positive end or a negative end.

When the battery controller 3 is welded to the cell electrode, the crimping portion 3221 of the inner electrode crimping piece 322 is bent depending on the shape of the inner electrode crimping piece 322, so that the inner electrode crimping piece can be in close contact with the cell electrode, and the contact area is large and the stability is high. After the battery controller 3 and the battery core are sealed, the tail of the movable end of the inner electrode pressing sheet 322 is naturally stressed to be contacted with the inner electrode, so that the connection area is increased, and the capacity of overlarge current is improved. This openly adopts inner electrode, inner electrode crimping piece and electric core connected mode to have good stability, can better avoid the emergence of the short circuit condition. The inner electrode bonding pad 322 is electrically and structurally connected to the columnar inner electrode 333 by welding.

The above description is only for the purpose of illustrating the preferred embodiments of the present disclosure and is not to be construed as limiting the scope of the present disclosure, but rather is intended to cover all equivalent structural changes made by applying the teachings of the present disclosure to the accompanying drawings.

Claims

1. A battery controller, comprising:

a controller housing made of a conductive material;

2. The battery controller according to claim 1, wherein the insulator is an insulating plate, the inner electrode crimping piece is disposed on a side of the insulating plate facing away from the circuit board, and an outer contour of the insulating plate protrudes outward beyond an outer contour of the crimping piece body;

3. The battery controller according to claim 1, wherein the insulator is an insulating ring that is snap-fitted or bonded to an outer periphery of the inner electrode crimping piece;

the crimping piece body is connected with the inner electrode.

4. The battery controller according to claim 2 or 3, wherein the crimping piece body is provided with an opening, one end edge of the crimping portion is connected with the opening edge, and the crimping portion is sheet-shaped and forms a concave surface facing the crimping piece body so that the crimping portion can make surface contact with a cell electrode of a battery.

5. The battery controller according to claim 4, wherein the other end side of the crimping portion is disconnected from the crimping piece body.

6. The battery controller of claim 4, wherein the crimp is arched, trapezoidal, curved, or semi-circular.

7. The battery controller according to claim 2, wherein notches are formed in both sides of the insulating plate, and a position limiting convex edge is arranged at a position, corresponding to the notch, of the crimping piece body of the inner electrode crimping piece, and the position limiting convex edge is clamped on the edge of the notch to realize positioning with the insulating plate.

8. The battery controller according to claim 2, wherein the insulating plate is provided with a limiting hole, a position of the crimping piece body of the inner electrode crimping piece corresponding to the limiting hole is provided with a limiting convex edge, and the limiting convex edge is clamped into the limiting hole to realize positioning with the insulating plate.

9. The battery controller of claim 2, wherein the insulating plate is further provided with a pad.

10. The battery controller of claim 1, wherein said inner electrode is a solid cylinder, said inner electrode being located off-center from said circuit board.

11. The battery controller according to claim 1, wherein the inner electrode crimping piece is an elastic metal piece.

12. A rechargeable battery, comprising a cylindrical battery case, a battery cell mounted in the battery case, and the battery controller of any one of claims 1 to 11, wherein an end of the battery case is exposed to the cell electrode, the battery controller is located at the end of the battery case, the inner electrode crimping piece of the battery controller is connected to the cell electrode, the controller housing of the battery controller is connected to the battery case, and the battery case is connected to another cell electrode of the battery cell.