CN103904714A - High-current charge and discharge circuit of battery capacity grading cabinet - Google Patents
High-current charge and discharge circuit of battery capacity grading cabinet Download PDFInfo
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- CN103904714A CN103904714A CN201210584607.XA CN201210584607A CN103904714A CN 103904714 A CN103904714 A CN 103904714A CN 201210584607 A CN201210584607 A CN 201210584607A CN 103904714 A CN103904714 A CN 103904714A
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- battery
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- grading system
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Abstract
The invention discloses a high-current charge and discharge circuit of a battery capacity grading cabinet, comprising a to-be-capacity-graded battery interface, a current detection circuit, a charge and discharge conversion circuit, a direct-current input interface and an MCU control unit. The current detection circuit is used for acquiring the current magnitude of the access end of a to-be-capacity-graded battery. The charge and discharge conversion circuit is used for charging and discharging the to-be-capacity-graded battery. The MCU control unit is used for sending a pulse width modulation signal to the charge and discharge conversion circuit and monitoring end voltages of the two ends of the to-be-capacity-graded battery in real time. Compared with the prior art, the high-current charge and discharge circuit of the invention has the following advantages: (1) high-current charge and discharge can be achieved, and the capacity grading cycle of batteries is shortened; and (2) the production cost of batteries is reduced.
Description
[technical field]
The present invention relates to technical field of new energies, relate in particular to a kind of high current charge-discharge circuit of battery grading system.
[background technology]
Lithium ion battery is as the important component part of new energy field, it relies on the advantages such as it is lightweight, specific energy is high, operating voltage is high, the life-span is long, self discharge is low, obtain significant progress, and be applied to rapidly in various modernization mobile communication equipments and field of portable electronic apparatus.Along with growing in intensity of energy crisis, each state is all in the substitute of finding most suitable energy source of car, and lithium ion battery, because it possesses above-mentioned advantage, becomes the preferred new forms of energy of each auto vendor gradually.
In order to adapt to the demand of energy source of car, the capacity of existing lithium ion battery is also increasing, and factory adopts grading system to realize charging for the first time and partial volume.But, the charge/discharge current of existing grading system is generally 2～5A, this grading system, can meet the partial volume needs of the battery of low capacity, but it is at partial volume high capacity cell, especially when electrokinetic cell, its charging and discharging currents is relatively too little, discharges and recharges the time oversize, and this greatly extends the battery production cycle, increase battery production cost, restricted the production of battery.
In view of above drawback, be necessary to provide a kind of high current charge-discharge circuit of improved battery grading system to overcome above-mentioned defect in fact.
[summary of the invention]
The present invention, in order to overcome above-mentioned defect, provides a kind of high current charge-discharge circuit of improved battery grading system.
To achieve these goals, the present invention adopts following technical scheme: a kind of high current charge-discharge circuit of battery grading system, it comprises: treat partial volume battery interface, current detection circuit, discharge and recharge change-over circuit, direct current input interface and MCU control unit, described current detection circuit is for gathering the size of current for the treatment of partial volume battery incoming end, the described change-over circuit that discharges and recharges is treated discharging and recharging of partial volume battery for realizing, and described MCU control unit is for sending pulse-width signal and monitor in real time the two ends terminal voltage for the treatment of partial volume battery discharging and recharging change-over circuit.
One as the high current charge-discharge circuit of battery grading system of the present invention is improved, described current detection circuit comprises current acquisition chip U1, capacitor C 1, C2 and resistance R 1, described current acquisition chip U1 at least also comprise connect treat partial volume anode and be connected the first pin that discharges and recharges change-over circuit.
One as the high current charge-discharge circuit of battery grading system of the present invention is improved, the described change-over circuit that discharges and recharges comprises transformer T1, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2 and resistance R 2, R3, wherein, after metal-oxide-semiconductor Q1 connects with R2, formation branch road and metal-oxide-semiconductor Q2 connect with R3 and form branch road, and the two ends of this two branch road are connected to respectively transformer T1 and MCU control unit.
One as the high current charge-discharge circuit of battery grading system of the present invention is improved, and described MCU control unit sends pulse-width signal to discharging and recharging change-over circuit, and it is for controlling the length of metal-oxide-semiconductor Q1 or metal-oxide-semiconductor Q2 ON time.
One as the high current charge-discharge circuit of battery grading system of the present invention is improved, and at least one the second pin of described transformer T1 stretches out and is connected with relay K 1, and described relay K 1 is optionally connected to direct current input interface or resistance R 6.
One as the high current charge-discharge circuit of battery grading system of the present invention is improved, the high current charge-discharge circuit of described battery grading system also comprises power supply changeover device U3, and described power supply changeover device U3 is for converting 220V civil power to the operating voltage of MCU control unit U2 and current acquisition chip U1.
One as the high current charge-discharge circuit of battery grading system of the present invention is improved, and the two ends of described current detection circuit are also parallel with capacitor C 3.
One as the high current charge-discharge circuit of battery grading system of the present invention is improved, described in discharge and recharge change-over circuit two ends be also parallel with capacitor C 4.
The present invention compared with prior art has the following advantages:
1) can realize high current charge-discharge, shorten the partial volume cycle of battery;
2) reduced the production cost of battery.
[brief description of the drawings]
Below in conjunction with the drawings and specific embodiments, high current charge-discharge circuit and useful technique effect thereof to battery grading system of the present invention are elaborated.
The circuit diagram of the high current charge-discharge circuit that accompanying drawing 1 is battery grading system of the present invention.
[embodiment]
Please refer to shown in Fig. 1, the high current charge-discharge circuit of a kind of battery grading system of the present invention, it comprises battery interface B+, B-, AC mains electricity input end mouth L, N, 12V input port 12V+, 12V-, power supply conversion U3, MCU control unit U2, current sample chip U1, capacitor C 1, C2, resistance R 1, R2, R3, R4R5, R6, electrochemical capacitor C3, C4, transformer T1, relay K 1, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, triode Q3.
Wherein, current acquisition chip U1 and capacitor C 1, C2, resistance R 1 forms current detection circuit, and be the first pin by the pin of current acquisition chip U1(current acquisition chip) 1,2 pin and 3, the 4 pin pin that is serially connected in B+ and transformer T(transformer be the second pin) 1,2,3 pin between, electrochemical capacitor C3 is connected in parallel between 1,2 pin and B of current acquisition chip U1, and electrochemical capacitor C4 is connected in parallel between 1 pin and 12V input port 12V+, 12V-of relay; Transformer T1, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2 and resistance R 2, R3 composition discharge and recharge change-over circuit, are serially connected between 1,2 pin and 1 pin of relay of current acquisition chip U1.Relay K 1 is the switch of 12V power supply and discharge resistance R6, and 1 pin of K1 connects 10,11,12 pin of T1, and 2 pin of K1 connect 12V input port 12V+, and discharge resistance R6 is connected between 3 pin and 12V-of K1.Resistance R 5 is connected between 3 pin of U3 and 5 pin of K1, and 1 pin of triode Q3 is connected with 8 pin of resistance R 4, MCU control unit, current acquisition chip U1, and 2 pin of Q3 are connected with 4 pin of K1, and 3 pin of Q3 are connected with 12V-end.Power supply conversion 1,2 pin of U2 and L, the N of AC civil power end are connected, 34 pin of U2 and 56 pin of U2, and 8 pin of U1 connect.1 pin that MCU controls U2 is connected with R2, and 2 pin of power supply conversion U2 are connected with R3, and 7 pin of U2 are connected with R1, and 3, the 4 pin batteries in parallel connection of power supply conversion U2 connect B+ and B-port.
Its operation principle is: the civil power of 220V, AC, 50Hz, through the input of AC output port, by the conversion of power transfer module U3, converts 220V civil power to the operating voltage of U1 in MCU control module U2 and current detection circuit.Will pass through battery link B+, B-place in circuit by partial volume battery, the battery voltage signal that 3,4 pin of the current signal that MCU control module U2 provides with current sampling unit U1 and MCU control module U2 gather.Judge battery status, it is charge mode or discharge mode that circuit is set, for circuit further work ready.
If charge mode, 8 output low levels of MCU control unit U2, 1 pin of relay K 1 is connected with 2 pin, 1 output one high level of U2, make metal-oxide-semiconductor Q1 in conducting state, the 2 pin output pwm signals of U2, in order to control conducting and the cut-off of metal-oxide-semiconductor Q2, now, the 12V direct voltage that outside provides, through 12V input port, relay K 1 is added in by transformer T1MOS pipe Q1Q2 and resistance R 2, what R3 formed discharges and recharges control unit, and transform through its energy control, by current sampling unit and battery connectivity port, battery is charged, charging current, can pass through the current sample of current acquisition unit U1, MCU control unit U2 arranges to regulate.When charging current is less than when current value is set.The duty ratio of the PWM ripple of the 2 pin outputs of U2 increases, and the ON time of metal-oxide-semiconductor Q2 increases, and the unit interval energy that battery obtains increases, and charging current will rise, and reaches set point; In the time that charging current is greater than set point.The duty ratio of the PWM ripple of the 2 pin outputs of U2 reduces, and the ON time of metal-oxide-semiconductor Q2 reduces, and the unit interval energy that battery obtains reduces, and charging current will decline, and reaches set point.And in whole charging process, MCU control unit U2 monitors battery charging voltage, judge the charged state of battery with cell voltage, charging current is carried out to the accumulation of time, calculate charging capacity.
If discharge mode, the 8 output high level of MCU control unit U2, 1 pin of relay K 1 is connected with 3 pin, 2 output one high level of U2, make metal-oxide-semiconductor Q2 in conducting state, the 1 pin output pwm signal of U2, in order to control conducting and the cut-off of metal-oxide-semiconductor Q1, now, the voltage of mesuring battary connects B+B-port through battery, current detecting unit U1 is added in by transformer T1MOS pipe Q1Q2 and resistance R 2, what R3 formed discharges and recharges control unit, and carry out Conversion of Energy through it, the transmission of 1 pin and 3 pin by relay K 1, discharged by resistance R 6, discharging current can pass through the current sample of current acquisition unit U1, the setting of MCU control unit U2, regulate.When discharging current is less than when current value is set.The duty ratio of the PWM ripple of the 1 pin output of U2 increases, and the ON time of metal-oxide-semiconductor Q1 increases, and the unit interval energy that resistance R 6 obtains increases, and discharging current will rise, and reaches set point; In the time that discharging current is greater than set point.The duty ratio of the PWM ripple of the 1 pin output of U2 reduces, and the ON time of metal-oxide-semiconductor Q1 reduces, and the unit interval energy that resistance R 6 obtains reduces, and discharging current will decline, and reaches set point.And in whole discharge process, MCU control unit U2 monitors battery discharge voltage, judge the discharge condition of battery with cell voltage, discharging current is carried out to the accumulation of time, calculate discharge capacity.
The high current charge-discharge circuit of a kind of battery grading system of the present invention, be not restricted to described in specification and execution mode, therefore for the personnel of familiar field, can easily realize additional advantage and amendment, therefore in the case of not deviating from the spirit and scope of the universal that claim and equivalency range limit, the present invention is not limited to specific details, representational equipment and illustrates here and the examples shown of describing.
Claims (8)
1. the high current charge-discharge circuit of a battery grading system, it is characterized in that, comprise: treat partial volume battery interface, current detection circuit, discharge and recharge change-over circuit, direct current input interface and MCU control unit, described current detection circuit is for gathering the size of current for the treatment of partial volume battery incoming end, the described change-over circuit that discharges and recharges is treated discharging and recharging of partial volume battery for realizing, and described MCU control unit is for sending pulse-width signal and monitor in real time the two ends terminal voltage for the treatment of partial volume battery discharging and recharging change-over circuit.
2. the high current charge-discharge circuit of battery grading system as claimed in claim 1, it is characterized in that: described current detection circuit comprises current acquisition chip U1, capacitor C 1, C2 and resistance R 1, described current acquisition chip U1 at least also comprise connect treat partial volume anode and be connected the first pin that discharges and recharges change-over circuit.
3. the high current charge-discharge circuit of battery grading system as claimed in claim 1, it is characterized in that: described in discharge and recharge change-over circuit and comprise transformer T1, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2 and resistance R 2, R3, wherein, after metal-oxide-semiconductor Q1 connects with R2, formation branch road and metal-oxide-semiconductor Q2 connect with R3 and form branch road, and the two ends of this two branch road are connected to respectively transformer T1 and MCU control unit.
4. the high current charge-discharge circuit of battery grading system as claimed in claim 3, is characterized in that: described MCU control unit sends pulse-width signal to discharging and recharging change-over circuit, and it is for controlling the length of metal-oxide-semiconductor Q1 or metal-oxide-semiconductor Q2 ON time.
5. the high current charge-discharge circuit of battery grading system as claimed in claim 3, is characterized in that: at least one the second pin of described transformer T1 stretches out and is connected with relay K 1, and described relay K 1 is optionally connected to direct current input interface or resistance R 6.
6. the high current charge-discharge circuit of battery grading system as claimed in claim 1, it is characterized in that: the high current charge-discharge circuit of described battery grading system also comprises power supply changeover device U3, described power supply changeover device U3 is for converting 220V civil power to the operating voltage of MCU control unit U2 and current acquisition chip U1.
7. the high current charge-discharge circuit of battery grading system as claimed in claim 1, is characterized in that: the two ends of described current detection circuit are also parallel with capacitor C 3.
8. the high current charge-discharge circuit of battery grading system as claimed in claim 1, is characterized in that: described in discharge and recharge change-over circuit two ends be also parallel with capacitor C 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210584607.XA CN103904714A (en) | 2012-12-28 | 2012-12-28 | High-current charge and discharge circuit of battery capacity grading cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210584607.XA CN103904714A (en) | 2012-12-28 | 2012-12-28 | High-current charge and discharge circuit of battery capacity grading cabinet |
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| CN103904714A true CN103904714A (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210584607.XA Pending CN103904714A (en) | 2012-12-28 | 2012-12-28 | High-current charge and discharge circuit of battery capacity grading cabinet |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3524675B2 (en) * | 1996-05-14 | 2004-05-10 | 三洋電機株式会社 | Battery charge / discharge control device |
| CN102301560A (en) * | 2009-01-30 | 2011-12-28 | Sk新技术 | Charge equalization apparatus and method for series-connected battery string |
| CN102723762A (en) * | 2012-02-15 | 2012-10-10 | 西安胜唐电源有限公司 | Lithium ion storage battery formation circuit |
-
2012
- 2012-12-28 CN CN201210584607.XA patent/CN103904714A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3524675B2 (en) * | 1996-05-14 | 2004-05-10 | 三洋電機株式会社 | Battery charge / discharge control device |
| CN102301560A (en) * | 2009-01-30 | 2011-12-28 | Sk新技术 | Charge equalization apparatus and method for series-connected battery string |
| CN102723762A (en) * | 2012-02-15 | 2012-10-10 | 西安胜唐电源有限公司 | Lithium ion storage battery formation circuit |
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Application publication date: 20140702 |
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