CN215008340U

CN215008340U - High-safety battery with injection molding and anode protection functions

Info

Publication number: CN215008340U
Application number: CN202120866487.7U
Authority: CN
Inventors: 丁传新; 汪庆盛; 邓兵; 向雪东; 全毅
Original assignee: Dongguan Fenghui Electronics Co ltd
Current assignee: Dongguan Fenghui Electronics Co ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-12-03
Anticipated expiration: 2031-04-26

Abstract

The utility model belongs to the technical field of accumulate equipment, concretely relates to have high security battery who moulds plastics and anodal protection concurrently, including electric core, sheetmetal, protection shield and anodal cap, the anodal electric connection of electric core is in the sheetmetal, protection shield and the integrative injection moulding of electric core, and the protection shield is provided with switch protection unit, and sheetmetal and anodal cap electricity respectively connect in switch protection unit, and switch protection unit is used for controlling the circuit break-make between anodal cap and the sheetmetal. The utility model discloses compact structure, the reliable and stable nature is good, and the security is strong, has accelerated the machining efficiency of battery effectively and has promoted the security performance of battery.

Description

High-safety battery with injection molding and anode protection functions

Technical Field

The utility model belongs to the technical field of accumulate equipment, concretely relates to have high security battery who moulds plastics and anodal protection concurrently.

Background

The battery is an electricity storage device with high capacity, long cycle life and wide use environment temperature, and can be widely applied to solar lamps, lawn lamps, backup energy sources, electric tools, toy models and photovoltaic energy sources. In the operation of the battery, in order to ensure the safety of the battery, a protective plate is often arranged on the battery.

However, the inventor finds that the processing operation process of the battery in the prior art is complex, the positions of all the components of the battery are often required to be manually searched and positioned, and the positions of the components for welding and fixing are identified by naked eyes, so that the reject ratio of the finished battery is high. Moreover, the battery in the prior art has unstable structure, high cost of processing labor and materials, and easy large deviation of the thickness and length direction of the battery. In addition, the scheme of the protection shield is supported to the current adoption support, and the support area of support is little, the dynamics is weak, not only makes the ability of the too big electric current of battery low, still often appears empty virtual battery emergence power failure's phenomenon that causes in PCM bottom. Therefore, a new type of high safety battery is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: aiming at the defects of the prior art, the high-safety battery with injection molding and anode protection is provided, the structure is compact, the stability and the reliability are good, the safety is high, the processing efficiency of the battery is effectively accelerated, and the safety performance of the battery is improved.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a have high security battery who moulds plastics and anodal protection concurrently, includes electric core, sheetmetal, protection shield and anodal cap, the anodal electricity of electric core connect in the sheetmetal, the protection shield with the integrative injection moulding of electric core, the protection shield is provided with switch protection unit, the sheetmetal with anodal cap electricity respectively connect in switch protection unit, switch protection unit is used for control anodal cap with circuit break-make between the sheetmetal.

Further, the switch protection unit is provided with a positive electrode protection circuit, the positive electrode protection circuit is provided with an MOS tube, the positive electrode cap and the metal sheet are respectively and electrically connected to the MOS tube, wherein, the positive electrode protection circuit can play the roles of overcharge protection, overdischarge protection, overcurrent protection and short circuit protection, when the positive electrode cap is connected to an external circuit, the battery cell passes through the metal sheet and is connected with the external circuit, and when the voltage or the loop current of the battery cell exceeds the specified value, the MOS tube realizes the switch-off of the switch, thereby effectively protecting the safety of the battery cell.

Further, the lateral part of electric core is provided with the steel band, the steel band electricity connect in the negative pole of electric core, the negative pole electricity connect in the switch protection unit of electric core, wherein, the steel band can be regarded as the negative pole of electric core draws forth the end.

Furthermore, one end of the steel belt is abutted to the battery core, the other end of the steel belt is abutted to the protection plate, the steel belt is L-shaped, and a round chamfer is arranged at the bending part of the steel belt, so that the surface of the steel belt is very flat, and the phenomenon that the battery is short-circuited due to the fact that the outer film of the battery core is damaged is effectively avoided and stopped.

Further, the metal sheet is arranged between the battery cell and the protection board, the metal sheet is a nickel sheet, the metal sheet abuts against the positive electrode of the battery cell, and the metal sheet can be welded to the protection board in a patch mode.

Further, the battery cell is provided with highland barley paper, the highland barley paper is enclosed in the anode of the battery cell, and the highland barley paper is used for preventing the phenomenon of short circuit between the anode and the cathode of the battery cell.

Further, the positive cap is arranged on the protection plate, the metal sheet and the positive cap are respectively arranged on two opposite sides of the protection plate, the positive cap serves as the positive output of the battery cell, and the positive cap can be welded on the protection plate in a regular hexagonal metal patch mode, so that overlarge current is facilitated.

Furthermore, the protection board is provided with an insulating gasket, the insulating gasket is arranged around the positive electrode cap, the insulating gasket can be made of PVC or PET, and the insulating gasket is covered on the protection board.

Further, the battery core is provided with an insulating film, the insulating film is used for wrapping the battery core, the insulating film can be made of PVC or PET, and in the battery assembling process, the outer side wall of the battery core is wrapped by the insulating film.

Furthermore, the battery also comprises an encapsulation sleeve, the battery core, the metal sheet and the protection plate are sequentially contained in the encapsulation sleeve, and the positive electrode cap is exposed out of the encapsulation sleeve.

The beneficial effects of the utility model reside in that: the utility model discloses an electricity core, the sheetmetal, protection shield and positive polar cap, protection shield and the integrative injection moulding of electricity core, it is firm to enough make protection shield and electric core assembly, make the stable reliability of protection shield and electricity core good, the crooked phenomenon has also been prevented effectively to appear in the protection shield, and, the protection shield is provided with switch protection unit, the positive pole electric connection of electricity core is in the sheetmetal, sheetmetal and positive polar cap electricity respectively connect in switch protection unit, switch protection unit is used for controlling the circuit break-make between positive polar cap and the sheetmetal, when positive polar cap inserts external circuit, switch protection unit can judge the operational aspect of electric core according to the positive output current voltage condition of electricity core, and simultaneously, when electric core operation is unusual, the circuit between positive polar cap and the sheetmetal breaks off fast, thereby the security performance of battery has been promoted effectively.

Drawings

Fig. 1 is an exploded view of the present invention.

Fig. 2 is a schematic diagram of the positive protection circuit of the present invention.

Fig. 3 is the assembly schematic diagram of the battery cell top assembly of the present invention.

Fig. 4 is a perspective view of the present invention.

Wherein: 1-electric core; 2-a metal sheet; 3-protecting the board; 4-positive electrode cap; 5-a steel belt; 6-highland barley paper; 7-an insulating spacer; 8-an insulating film; 9-packaging sleeve.

Detailed Description

As used in this specification and the appended claims, certain terms are used to refer to particular components, and it will be appreciated by those skilled in the art that a manufacturer may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply 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 limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be described in further detail with reference to the accompanying drawings 1 to 4 and the specific embodiments, but the present invention is not limited thereto.

Example 1

The utility model provides a have high security battery of moulding plastics and anodal protection concurrently, as shown in figure 1, including electric core 1, sheetmetal 2, protection shield 3 and positive pole cap 4, the anodal electric connection of electric core 1 is in sheetmetal 2, protection shield 3 and the integrative injection moulding of electric core 1, and protection shield 3 is provided with the switch protection unit, and sheetmetal 2 and positive pole cap 4 electricity respectively connect in the switch protection unit, and the switch protection unit is used for controlling the circuit break-make between positive pole cap 4 and the sheetmetal 2.

The utility model discloses an in the battery production, protection shield 3 is fixed with low pressure injection molding process, adopts materials such as plastics, rubber, silica gel to fix the lateral margin of protection shield 3 and the outer fringe of electricity core 1 through the mode that the low pressure was moulded plastics, and the material of moulding plastics is big at the packing area between protection shield 3 and electricity core 1, and it supports fixed area of contact and is bigger than conventional support, not only can make the stress surface of protection shield 3 big, still makes the assembly of protection shield 3 more firm.

As shown in fig. 2, the switch protection unit is provided with a positive protection circuit, the positive protection circuit is provided with an MOS tube, a positive cap 4 and a metal sheet 2 are respectively electrically connected to the MOS tube, wherein the positive cap 4 is a P + signal terminal in the circuit, the metal sheet 2 is a B + signal terminal in the circuit, the model of the MOS tube may be CJS8810, the MOS tube is established between B + and P +, a small package element is selected for use by the device, which can reduce a piece distribution space and reserve sufficient position overcurrent, and the positive protection circuit is further provided with a control IC and an S-8211 electric core protection chip.

The operation principle of the positive electrode protection circuit is as follows: under all normal conditions, the control IC controls the MOS tube switch to be switched on, so that the battery cell 1 is sequentially connected with an external circuit through the metal sheet 2 and the positive electrode cap 4, and when the voltage or the loop current of the battery cell 1 exceeds a specified value, the control IC immediately (tens of milliseconds) controls the MOS tube switch to be switched off, thereby effectively protecting the safety of the battery cell 1.

The positive electrode protection circuit includes: 1) over-charge protection, when the battery is charged to enable the voltage to exceed a set value VC (4.25-4.35V), VD1 is turned over to enable Cout to become a low level, T1 is cut off, and charging is stopped; when the battery voltage falls back to VCR (3.8-4.1V), Cout goes high, T1 turns on, the charging of the battery continues, and VCR is less than VC by a fixed value to prevent frequent jumps. 2) Over-discharge protection, when the battery voltage is reduced to a set value VD (2.3-2.5V) due to discharge, VD2 is turned over, after a short time delay, Dout is changed into low level, T2 is cut off, and discharge is stopped; when the battery is placed into charge, the internal OR gate is flipped to turn T2 back on and ready for the next discharge. 3) And overcurrent and short-circuit protection, wherein when the current of a charge-discharge loop of the circuit exceeds a set value or is short-circuited, the short-circuit detection circuit acts to turn off the MOS tube and cut off the current.

As shown in fig. 3, a steel strip 5 is disposed on a lateral portion of the battery cell 1, the steel strip 5 is electrically connected to a negative electrode of the battery cell 1, the negative electrode of the battery cell 1 is electrically connected to the switch protection unit, where the steel strip 5 is a P-signal end in the circuit, one end of the steel strip 5 abuts against the battery cell 1, the other end of the steel strip 5 abuts against the protection plate 3, the steel strip 5 is L-shaped, and the number of the steel strips 5 is 2.

On the one hand, steel band 5 can carry out paster welding process, can enough material saving cost, has also reduced the product internal resistance and has connect the loaded down with trivial details of spot welding mode, and on the other hand, the department of buckling of steel band 5 is provided with round chamfer to make steel band 5's surface very level and smooth, changed and to have the bellied phenomenon of metal after crossing the membrane in the past, avoided effectively and stopped the adventitia damage of electricity core 1 and leaded to the phenomenon that the battery produced the short circuit.

In the assembling process of the top assembly of the battery cell 1, the metal sheet 2 is arranged between the battery cell 1 and the protection board 3, the metal sheet 2 is a nickel sheet, the metal sheet 2 is abutted to the positive electrode of the battery cell 1, so that the nickel sheet is pasted to the edge of the protection board 3, the side edge of the battery cell 1 is welded, a double-welding-pad double-welding process is adopted, and the metal sheet 2 can be effectively fixed to the positive electrode of the battery cell 1.

Preferably, in order to ensure that no short circuit occurs between the positive electrode and the negative electrode of the battery cell 1, the battery cell 1 is provided with the highland barley paper 6, the highland barley paper 6 is enclosed in the positive electrode of the battery cell 1, and the highland barley paper 6 is arranged between the battery cell 1 and the metal sheet 2.

After protection shield 3 fixes with the low pressure technology of moulding plastics, set up anodal cap 4 in protection shield 3, sheetmetal 2 and anodal cap 4 set up respectively in the relative both sides of protection shield 3, and wherein, anodal cap 4 can be regular hexagon's steel cap, and anodal cap 4 is anodal output, can adopt regular hexagon metal patch mode to weld, more is favorable to the overcurrent.

As shown in fig. 4, the protection plate 3 is provided with an insulating gasket 7, the insulating gasket 7 surrounds the positive electrode cap 4, the material of the insulating gasket 7 may be PVC or PET, and the insulating gasket 7 covers the protection plate 3.

Preferably, the battery core 1 is provided with an insulating film 8, the insulating film 8 is used for wrapping the battery core 1, the material of the insulating film 8 can be PVC or PET, and in the battery assembling process, the insulating film 8 wraps the outer side wall of the battery core 1.

Preferably, the battery further comprises an encapsulation sleeve 9, the battery core 1, the metal sheet 2, the protection plate 3 and the insulating gasket 7 are sequentially accommodated in the encapsulation sleeve 9, the positive electrode cap 4 is exposed out of the encapsulation sleeve 9, the encapsulation sleeve 9 may be made of PVC or PET, and the battery may be a cylindrical battery with a 21700 structure.

Example 2

The present embodiment is different from embodiment 1 in that the encapsulation 9 is provided with a slot corresponding to the steel strip 5, and the steel strip 5 can be electrically connected directly through the slot of the encapsulation 9, thereby facilitating the efficient operation of the battery.

Other structures of this embodiment are the same as those of embodiment 1, and are not described herein again.

Obviously, the utility model discloses compact structure, the security is strong, has promoted the security performance of battery effectively, in addition, adopts injection moulding technology to fix protection shield and electric core, can make the battery have more stability, and wherein, this fixed mode has both changed the support mode of several points of support in the past, also makes the protection shield can not produce not hard up phenomenon, and simultaneously, mould injecting glue product size is more stable for the size of battery is reliable and stable, moreover the utility model discloses an in the battery course of working, can directly assemble each part, need not to carry out preceding processing at the PCB board, thereby has promoted the production efficiency of battery and has reduced artificial cost effectively.

Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. The utility model provides a have high security battery of moulding plastics and anodal protection concurrently which characterized in that: including electric core (1), sheetmetal (2), protection shield (3) and positive pole cap (4), the positive pole electricity of electric core (1) connect in sheetmetal (2), protection shield (3) with the integrative injection moulding of electric core (1), protection shield (3) are provided with the switch protection unit, sheetmetal (2) with positive pole cap (4) electricity respectively connect in the switch protection unit, the switch protection unit is used for control positive pole cap (4) with circuit break-make between sheetmetal (2).

2. The high safety battery of claim 1, wherein the battery has both injection molding and positive electrode protection, and further comprises: the switch protection unit is provided with an anode protection circuit, the anode protection circuit is provided with an MOS (metal oxide semiconductor) tube, and the anode cap (4) and the metal sheet (2) are respectively and electrically connected with the MOS tube.

3. The battery according to any one of claims 1 to 2, wherein the battery has both injection molding and positive electrode protection, and is characterized in that: the side part of the battery cell (1) is provided with a steel belt (5), the steel belt (5) is electrically connected to the negative electrode of the battery cell (1), and the negative electrode of the battery cell (1) is electrically connected to the switch protection unit.

4. The high safety battery of claim 3, wherein the battery has both injection molding and positive electrode protection, and further comprises: one end of the steel belt (5) is abutted to the battery cell (1), the other end of the steel belt (5) is abutted to the protection plate (3), and the steel belt (5) is L-shaped.

5. The battery according to any one of claims 1 to 2, wherein the battery has both injection molding and positive electrode protection, and is characterized in that: the metal sheet (2) is arranged between the battery cell (1) and the protection plate (3), the metal sheet (2) is a nickel sheet, and the metal sheet (2) is abutted to the positive electrode of the battery cell (1).

6. The high safety battery of claim 5, wherein the battery has both injection molding and positive electrode protection, and further comprises: the battery cell (1) is provided with highland barley paper (6), and the highland barley paper (6) is enclosed in the anode of the battery cell (1).

7. The battery according to any one of claims 1 to 2, wherein the battery has both injection molding and positive electrode protection, and is characterized in that: the positive electrode cap (4) is arranged on the protection plate (3), and the metal sheet (2) and the positive electrode cap (4) are respectively arranged on two opposite sides of the protection plate (3).

8. The high safety battery of claim 7, wherein the battery has both injection molding and positive electrode protection, and further comprises: the protection plate (3) is provided with an insulating gasket (7), and the insulating gasket (7) is arranged around the positive electrode cap (4).

9. The high safety battery of claim 1, wherein the battery has both injection molding and positive electrode protection, and further comprises: the battery cell (1) is provided with an insulating film (8), and the insulating film (8) is used for wrapping the battery cell (1).

10. The high safety battery of claim 1, wherein the battery has both injection molding and positive electrode protection, and further comprises: the battery also comprises an encapsulation sleeve (9), and the battery core (1), the metal sheet (2) and the protection plate (3) are sequentially accommodated in the encapsulation sleeve (9).