CN200987075Y

CN200987075Y - Square shaped lithium ion secondary battery precharging device

Info

Publication number: CN200987075Y
Application number: CN 200620027349
Authority: CN
Inventors: 王念举; 王玉来; 吉跃华; 李洪贺; 王红霞
Original assignee: Tianjin Lishen Battery JSCL
Current assignee: Tianjin Lishen Battery JSCL
Priority date: 2006-09-19
Filing date: 2006-09-19
Publication date: 2007-12-05
Anticipated expiration: 2016-09-19

Abstract

The utility model relates to a pre-charging device of square lithium ion secondary battery, comprising an AC power supply, an adjustable timer, a switch, a power supply of voltage stabilizing transformer and one or more connected chargers. The AC power supply is connected to the switch and the power supply of voltage stabilizing transformer, and the adjustable timer is connected to the switch. The chargers is connected to the output terminal of the power supply of voltage stabilizing transformer in parallel, then the output terminal of the chargers are connected to the pre-charge battery for pre-charging, respectively. The utility model adopts the fixed electronic lines to instead of the common programmable circuit of single-chip microprocessor, reduces the current fluctuation due to the current regulation by the stability of the output current, increases the accuracy of the current output based on the significant reduction of cost, so as to effectively increases the control accuracy of the constant current. In addition, the utility model is characterized in that the preliminary formation process is only controlled by the electronic timer for convenient operation and control, so as to maintain convenient operation and full meet the control requirement of the charge capacity.

Description

The square lithium ion secondary cell precharging device

Technical field

The utility model relates to and is used for electronic measurements and the control device that lithium ion battery is produced, particularly a kind of square lithium ion secondary cell precharging device.

Background technology

At present; at lithium ion battery; particularly in the rectangular lithium ion battery manufacturing process; generally adopt the pre-chemical synthesis technology of opening; the equipment of general pre-formation process is to continue to use the equipment that changes into ageing process basically; possess very many functions; regulate as numerical control continous way electric current and voltage; the rapid charging flow of programmatic method multistep; complete charge-discharge system and overvoltage detect protection; the overcurrent undercurrent protection; the super safety protection functions such as protection that hold of charging; and battery self check; power-off protection; recover; miscellaneous functions such as Microcomputer Data storage and processing, this has just caused pre-formation process cost very high.And in fact all concentrate on 700mAh to 1000mAh such as the ratio of capacity more than 90% of battery of mobile phone, and the electric manufacturer of current lithium produces 90% of battery and focuses on this scope, consider efficient and practical application, can use the pre-formation device that only has constant current 90mA function fully.If our the model capacity of production mainly concentrates on the pre-formation device that can adopting of 2000mA scope only has constant current 200mA function certainly.Because electric current to forming good SEI film between the 0.3C, satisfies the demand of the every performance of battery at 0.01C.Therefore, the further pre-formation device of design optimization, the simplification of implement device and function are improved, and are the another new problems that this field technology personnel carry out scientific research and development.

The utility model content

The purpose of this utility model is to overcome above-mentioned weak point, and a kind of simple in structure, easy and simple to handle, reasonable in design, dependable performance is provided, and the low square lithium ion secondary cell precharging device of cost.

The technical scheme that the utility model adopted is for achieving the above object: a kind of square lithium ion secondary cell precharging device is characterized in that this device comprises AC power, adjustable timer, switch, voltage stabilizing transformer power supply and the more than one charger composition that is attached thereto; Described AC power is connected with the voltage stabilizing transformer power supply by switch, and described adjustable timer is connected with switch; Described each charger is connected in parallel in the voltage stabilizing transformer power output end, and each charger output is connected with precharge cell respectively simultaneously.

Described charger comprises that triode Q1, diode D1, D2, resistance R 4, R5 form constant-current circuit, control constant current output, and controllable silicon T is the low pressure reduction constant voltage circuit of core; Resistance R 8 and R9 form bleeder circuit, and controllable silicon T and resistance R 2 are formed sampling amplification circuit; The connected resistance R 4 of triode Q1, R5 form current-limiting protection circuit; Triode Q2 is for adjusting pipe; Promptly by two diode D1, D2 and resistance R 2, R3, be formed on the base stage of triode Q2 and the constant voltage circuit on the emitter with resistance R 7, make the collector electrode of triode Q2 produce a constant current, its electric current can be adjusted by resistance R 1, when the battery plus-negative plate reversal connection, voltage inversion on the resistance R 2, can trigger controllable silicon T conducting, current flowing resistance R4, R5 are arranged, triode Q1 conducting, triode Q2 is ended, play the anti-protective effect of filling; The voltage stabilizing process is: when output voltage reduced, a point current potential reduced, and through the inner amplification of controllable silicon T, the b point voltage was increased, and after triode Q2 adjusted, c point current potential raise; Otherwise when output voltage increased, a point current potential raise, and b point current potential reduces, and after triode Q2 adjusted, c point current potential reduced, thereby makes output voltage stabilization; Capacitor C 1 in the circuit, C2 are filter capacitor.

The beneficial effects of the utility model are: simple in structure, reasonable in design, adopted fixing electronic circuit to replace general single-chip microcomputer programme control circut, immobilization by output current has reduced because the current fluctuation that Current Regulation causes, on the basis that reduces cost significantly, improved the accuracy of electric current output; Another characteristics are for ease of operation and control, and pre-formation process is only controlled by electronic timer, so both makes things convenient for the workman to operate, and can fully satisfy the demand for control of charging capacity again.This installation cost reduces, and is widely used.

Description of drawings

Fig. 1 is that the utility model overall structure connects block diagram;

Fig. 2 is the utility model charger circuit schematic diagram.

Among the figure: 1 AC power, 2 adjustable timers, 3 switches, 4 voltage stabilizing transformer power supplys, 5 chargers, 6 batteries.

Embodiment

Below in conjunction with accompanying drawing and preferred embodiment, details are as follows to embodiment, structure, feature that foundation the utility model provides:

As shown in Figure 1, a kind of square lithium ion secondary cell precharging device is characterized in that more than one charger 5 compositions that this device comprises AC power 1, adjustable timer 2, switch 3, voltage stabilizing transformer power supply 4 and is attached thereto; Described AC power 1 is connected with voltage stabilizing transformer power supply 4 by switch 3, and described adjustable timer 2 is connected with switch 3; Described each charger 5 is connected in parallel in voltage stabilizing transformer power supply 4 outputs, and simultaneously each charger 5 output is connected with precharge cell 6 respectively and carries out precharge.

As shown in Figure 2, charger 6 comprises that triode Q1 adopts model 8550, diode D1, D2 to adopt model 1N4728, resistance R 4, R5 to adopt composition constant-current circuits such as model 101, the constant current output of control 40mA, and model is that the controllable silicon T of TL431 is the low pressure reduction 3.8V constant voltage circuit of core; Resistance R 8 and R9 form bleeder circuit, and controllable silicon T adopts model TL431 and resistance R 2 to form sampling amplification circuit; The connected resistance R 4 of triode Q1, R5 form current-limiting protection circuit; Triode Q2 adopts the model B772 pipe that adjusts.

Promptly by two diode D1, D2 and resistance R 2, R3, be formed on the base stage of triode Q2 and the constant voltage circuit on the emitter with resistance R 7, make the collector electrode of triode Q2 produce a constant current, its electric current can be adjusted by resistance R 1, its output current I=(1.4V-0.7V)/18=40mA when both having made the output shorted to earth, this electric current also is the charging current to battery.Resistance R 7 can adopt 821, and resistance R 1 can adopt 18R0.When the battery plus-negative plate reversal connection, the voltage inversion on the resistance R 2 can trigger controllable silicon T conducting, and current flowing resistance R4, R5 are arranged, and triode Q1 conducting ends triode Q2, plays the anti-protective effect of filling.The voltage stabilizing process is: when output voltage reduced, a point current potential reduced, and through the inner amplification of controllable silicon T, the b point voltage was increased, and after triode Q2 adjusted, c point current potential raise.Otherwise when output voltage increased, a point current potential raise, and b point current potential reduces, and after triode Q2 adjusted, c point current potential reduced, thereby makes output voltage stabilization.Capacitor C 1 wherein, C2 play filter action.

By the project organization and the circuit control that improve original pre-formation device, constant-current source circuit and the loop constant voltage circuit exported by fixed current are constituted.It is simple in structure, and can satisfy precision control, can reach to save the purpose that changes into cost in advance and save operating process significantly.

Described adjustable timer 2 adopts and can and have the electronic timer of function of automatically cutting off in the 0-1000min range regulation.

The civil power of 220V AC power 1 is by the switch 3 and voltage stabilizing transformer power supply 4 of adjustable timer 2 controls; promptly through being output as the constant voltage direct current of 6V behind the voltage stabilizing transformer power supply 4; realize constant current 40mA output by charger 5 again; the constant voltage 3.8V circuit of charger 5 prevents that then as protective circuit battery 6 from overcharging.

It is the electronic timer of TE1503 that adjustable timer 2 can adopt model, and voltage stabilizing transformer power supply 4 adoptable models are STD-20.Precharge capacity by adjustable timer 2 control batteries 6.

Change into when operation, at first battery to be charged be connected with the charger output, treat that all battery connections finish after, start adjustable timer, press the technique initialization time, begin charging, after the end to be charged, adjustable timer is promptly reported to the police and is cut off the electricity supply switch automatically.Pre-formation device characteristics of the present utility model have been to omit the general discharge circuit that changes into system, safety protective circuit and computer program control section; And because the current regulation control of constant current part changes the constant current output of permanent circuit into, such design can improve the control precision of constant current.

Above-mentioned detailed description of this square lithium ion secondary cell precharging device being carried out with reference to embodiment; be illustrative rather than determinate; therefore in the variation and the modification that do not break away under the utility model general plotting, should belong within the protection range of the present utility model.

Claims

1, a kind of square lithium ion secondary cell precharging device is characterized in that this device comprises AC power, adjustable timer, switch, voltage stabilizing transformer power supply and the more than one charger composition that is attached thereto; Described AC power is connected with the voltage stabilizing transformer power supply by switch, and described adjustable timer is connected with switch; Described each charger is connected in parallel in the voltage stabilizing transformer power output end, and each charger output is connected with precharge cell respectively simultaneously.

2, square lithium ion secondary cell precharging device according to claim 1, it is characterized in that described charger comprises that triode Q1, diode D1, D2, resistance R 4, R5 form constant-current circuit, control constant current output and controllable silicon T are the low pressure reduction constant voltage circuit of core; Resistance R 8 and R9 form bleeder circuit, and controllable silicon T and resistance R 2 are formed sampling amplification circuit; The connected resistance R 4 of triode Q1, R5 form current-limiting protection circuit; Triode Q2 is for adjusting pipe; Promptly by two diode D1, D2 and resistance R 2, R3, be formed on the base stage of triode Q2 and the constant voltage circuit on the emitter with resistance R 7, make the collector electrode of triode Q2 produce a constant current, its electric current can be adjusted by resistance R 1, when the battery plus-negative plate reversal connection, voltage inversion on the resistance R 2, can trigger controllable silicon T conducting, current flowing resistance R4, R5 are arranged, triode Q1 conducting, triode Q2 is ended, play the anti-protective effect of filling; The voltage stabilizing process is: when output voltage reduced, a point current potential reduced, and through the inner amplification of controllable silicon T, the b point voltage was increased, and after triode Q2 adjusted, c point current potential raise; Otherwise when output voltage increased, a point current potential raise, and b point current potential reduces, and after triode Q2 adjusted, c point current potential reduced, thereby makes output voltage stabilization; Capacitor C 1 in the circuit, C2 are filter capacitor.