CN1360385A - Charger for serially connected batteries - Google Patents
Charger for serially connected batteries Download PDFInfo
- Publication number
- CN1360385A CN1360385A CN00120608A CN00120608A CN1360385A CN 1360385 A CN1360385 A CN 1360385A CN 00120608 A CN00120608 A CN 00120608A CN 00120608 A CN00120608 A CN 00120608A CN 1360385 A CN1360385 A CN 1360385A
- Authority
- CN
- China
- Prior art keywords
- battery
- series
- voltage
- charging
- charger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a electrical charger that charges each battery in serial by using charging method in three stages: constant current, constant voltage and tiny current. There are several windings, rectifier diode and filtering capacitor that are located on secondary side of switching transformer and corresponding to each battery. The two ends of cascaded batteries are connected to the two ends of filtering capacitors being connected in series. One end of the switch is connected to the place between filtering capacitors, and the other end is connected to corresponding connector of each cascaded battery. Since the function of the switch, constant current charges the batteries first, then each battery is undergone the charging process in equivalent parallel so as to charge each battery fully, also avoid happening of over voltage and over current.
Description
The invention belongs to electronic technology field.
Battery as herein described is chargeable storage battery, is called for short battery.As everyone knows, element cell refers to the least unit of all types of batteries; Be encapsulated in the housing after the element cell series connection of monoblock battery index, only anode and negative terminal after the series connection drawn.Series battery of the present invention is meant by the element cell of independent encapsulation or monoblock battery series connected battery group.The charging of battery can be divided into DC charging and pulse current dashes.Modes such as DC charging plain mode charging commonly, constant current charge, two sections chargings of constant current constant voltage, the charging of constant current constant voltage trickle syllogic.Battery has numerous species, as lead acid accumulator, cadmium-nickel storage cell, nickel-hydrogen accumulator, lithium storage battery, sodium rice storage battery or the like.The charging requirement of all kinds of batteries has nothing in common with each other, and in other words, the charging curve of all kinds of batteries has nothing in common with each other.Normally the charging overall process of battery is divided into the some time section, controls charging current or the charging voltage of each time period, make the battery full charge.With the lead acid accumulator is example, and at present more satisfactory charging curve as shown in Figure 1.In Fig. 1, can see at T
0＜T＜T
1The time, constant-current charging of battery; At T
1＜T＜T
2The time, the battery constant voltage charge; At T＞T
2The time, the battery trickle is safeguarded charging.To different types of charge in batteries, a charging curve that needs assurance to adapt with it.Existing charging technique can guarantee whole series battery is implemented more satisfactory charging curve, but can not guarantee the charging curve of each piece battery in the series battery.Reason is because the performance of interior each the piece battery of series battery is inconsistent, makes that the charging of each battery is inhomogeneous, the ceiling voltage of the charging voltage overshoot of the battery that can have, and the battery that has does not reach assigned voltage.The previous case can cause direct infringement to battery, and latter event battery charge deficiency influences the discharge capability of whole battery group, and the overdischarge infringement also takes place easily.Two kinds of common repeat functions of situation cause the charge of series-connected batteries ability drop, and shorten useful life.
The purpose of this invention is to provide a kind of charger at series battery, it can make each piece battery in the series battery reach the charging voltage of regulation, overvoltage, over-current phenomenon avoidance can not occur again, realizes more satisfactory charging curve.
The present invention seeks to realize like this: at first battery pack is implemented the series connection constant current charge, and then each battery in the battery pack is carried out the equivalent parallel charging.Concrete scheme is: have and the battery of series battery winding and rectifier diode and filtering capacitor one to one at the secondary of switch transformer, be connected in series between the filtering capacitor, the composition series battery is connected in series between the battery, two ends after the series connection of series battery two ends and filtering capacitor are connected, variable connector one end is connected on respectively on the tie point of each series-connected cell, and the other end is connected on the tie point between each filtering capacitor corresponding with the tie point of each series-connected cell.As shown in Figure 2.
Operation principle of the present invention as shown in Figure 2, shown in Fig. 2 is situation to the series battery charge of being made up of three batteries.The switch transformer secondary of charger has corresponding three windings and rectifier diode and filtering capacitor, and K switch disconnects, and to three batteries constant current charge of connecting, the voltage of every battery constantly rises.Since the difference of battery, the every speed difference that battery rises.When any cell voltage in three batteries rises to the ceiling voltage that charging allows, the K switch closure, three windings of switch transformer secondary are separately to a battery charge of correspondence.Because the difference of battery performance, the electric current of three batteries can be variant.Constant current value when the electric current of maximum is restricted to serial connection charge, the meeting of the relative deficiency of charging in three batteries this moment obtains replenishing, the voltage of three batteries is under the balanced action of switch transformer, can reach unanimity, the final ceiling voltage that all can reach the charging permission, the charger of this moment is equivalent to three batteries are carried out the charged in parallel state.
Owing to adopt such scheme, it can make, and each piece battery can both be sufficient in the series battery, overvoltage, over-current phenomenon avoidance can not occur again.
By control circuit control variable connector, as machinery or electronic switches such as relay, bidirectional triode thyristors, above-mentioned charging process can realize automatically.
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is charging current, charging voltage curve;
Fig. 2 is circuit theory diagrams of the present invention;
Fig. 3 is the circuit theory diagrams of the embodiment of the invention;
Wherein, U1, U2, U3, U4, U5, U6, U7, U8 are comparators, and G1, G2 are the PNP transistors, and G3, G4 are optical couplers, G5 is a power field effect pipe, E1, E2 are batteries, and TL431 is a voltage-stabiliser tube able to programme, and T is a high-frequency pulse transformer, its secondary winding L 3, L4 parameter are identical, J is a relay, has one group of normally opened contact, and AC is the civil power input.
The charger of the series battery of forming by two batteries shown in Fig. 3.In Fig. 3, C1, C2 left side circuit is the pulse-width modulation single-end flyback switching power supply of civil power input, two groups of direct current outputs.Here, the also Switching Power Supply of available other type, as long as high-frequency pulse transformer secondary winding L3, L4 parameter are identical, induced electromotive force is identical to get final product.
G1 R13 R14 is the voltage sample circuit of battery E1, and R23, R24 are the voltage sample circuits of battery E2.TL431 provides programmable voltage reference, and when comparator U5 saturation conduction, TL431 provides inductive charging ceiling voltage V
MaxBenchmark; When U5 turn-offed, TL431 provided corresponding trickle to safeguard charging voltage V
0Benchmark.
Constitute the pressure limiting circuit of charger by voltage sample circuit, voltage reference TL431 and the G4 of U7 U8 and E1, E2.As long as the voltage on R13 or the R23 is greater than voltage reference, U7 or U8 will conductings, feed back to the FB end of elementary PWM by optocoupler pipe G4, and elementary PWM will reduce the on-state rate of G5, finally the charging voltage to E1 or E2 is limited in set-point maximum charging voltage V
Max(when comparator U5 saturation conduction) or be limited in V
0(when comparator U5 turn-offs).
U7, U8 are negative or relation with being connected of G4, always the bigger at first pressure limiting of the charging voltage of E1, E2.Therefore, the charging voltage of two batteries all can only be equal to or less than V
Max
RS1 is an E1 charging current sample resistance, when the E1 charging current in the pressure drop of RS1 pressure drop sum greater than R11 and R12, comparator U1 will conducting, G3 feeds back to elementary PWM by the optocoupler pipe, the on-state rate of G5 will reduce, finally to the charge-current limit of E1 at set-point I
Max
In like manner, the current-limiting circuit of the E2 that forms by RS2, R21, R22 and U3, can to the charge-current limit of E2 at set-point I
Max
U1, U3 are negative or relation with being connected of G3, always the bigger at first current limliting of the charging current of E1, E2.Therefore, the charging current of two batteries all can only be equal to or less than I
Max
Comparator U6 and D4, D5, D6 etc. form the comparator circuit of a voltage delay, and after the energized, the initial condition of U6 is turn-offed, at this moment, and E1 and E2 serial connection charge; As long as E1 and arbitrary battery of E2 reach V
Max, U6 can overturn to conducting state and keep, this moment relay J coil electricity, the normally opened contact closure of J, specially to E1 charging, L4's L3 specially charges to E2.Because the transformer magnetic circuit coupling, what voltage was low among E1, the E2 will obtain bigger charging current, and this just makes the E1 and the E2 that are connected in series obtain the effect that equivalent parallel charges, and the voltage that finally makes every battery is all near given ceiling voltage V
Max, can both full charge, thus reach purpose of the present invention.
By transformer working principle as can be known, the equivalent electric circuit of ideal transformer is exactly the load secondary each winding, converts the parallel connection of elementary back by the turn ratio of primary and secondary.This has just proved the feasibility of series battery being carried out the equivalent parallel charging theoretically.
R S1 R11, U2 form comparator circuit.When the charging current of E1 greater than I
0The time, the U2 saturation conduction; When the charging current of E1 less than I
0The time, U2 turn-offs.Equally, the comparator circuit of forming by RS2 R21, U4, when the charging current of E2 greater than I
0The time, the U4 saturation conduction; When the charging current of E2 less than I
0The time, U4 turn-offs.Because U2, U4 just connect into and relation, so, when the charging current of E1 and E2 all less than I
0The time, U2, U4 turn-off, and comparator U5 brings out existing high level in the same way, is higher than end of oppisite phase, and U5 turn-offs, and the voltage stabilizing value of TL431 is reduced, and the voltage limiting value of E1, E2 charging is dropped to float charge voltage value V
0, realized that E1, E2 are carried out trickle safeguards charging.So far, each the piece battery in the series battery is full charge substantially, and complete charge comes into operation at any time.
In sum, embodiment of the invention charger connect charge power supply and load onto wait to fill series battery after because the voltage of every battery is all lower, be lower than V
MaxSo, this moment U6 turn-offs, the coil of relay J is not switched on, the normally opened contact of J can not the closure, charger carries out serial connection charge to battery pack, charging current by current limliting at I
MaxIn, the charging current of every battery is the same, has avoided the different shortcoming of each piece battery current of charged in parallel.At this moment, the voltage rising value of each piece battery is different owing to the difference of every battery performance.When any cell voltage rises to V
MaxWhen neighbouring, comparator U6 saturation conduction, the normally opened contact closure of relay J, charger carries out the equivalent parallel charging to series battery, and at this moment, the battery that voltage is lower can obtain bigger charging current, and voltage rises very fast.Because the pressure limiting effect of U7, U8 and the metering function of U1, U3, all batteries can overvoltages, overcurrent, voltage finally all equals or near V
Max, embodied the advantage of charged in parallel.Electric current is more and more littler, when the charging current of every battery all less than I
0The time, comparator U5 turn-offs, and voltage limiting value is reduced to float charge voltage V
0, carrying out trickle and safeguard charging, every battery in this moment series battery is full charge, complete charge at any time substantially.Hence one can see that, and the present embodiment charger can be to each the piece cell safety in the series battery, charge efficiently.
Claims (3)
1 one kinds of charger for serially connected batteries, it is characterized in that secondary at switch transformer has and the battery of series battery winding and rectifier diode and filtering capacitor one to one, filtering capacitor is connected in series, the battery series connection connects to form series battery, two ends after the series connection of series battery two ends and filtering capacitor are connected, one end on each road of variable connector is connected on respectively on the tie point of each series battery, and the other end is connected on the tie point between each filtering capacitor corresponding with the tie point of each series battery.
2 a kind of charger for serially connected batteries according to claim 1 is characterized in that the function of described variable connector realizes that by relay J its work is controlled by comparator F, and in the series battery charge starting stage, the voltage of every battery all is lower than V
Max, this moment, comparator F turn-offed, and the coil of relay J is not switched on, and the normally opened contact of J can not closure, and charger carries out serial connection charge to battery pack, when the voltage of any battery rises to V
MaxWhen neighbouring, comparator F saturation conduction, the normally opened contact closure of relay J, charger carries out the equivalent parallel charging to series battery.
3 a kind of charger for serially connected batteries according to claim 1 is characterized in that described variable connector also can adopt other machinery or electronic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00120608A CN1360385A (en) | 2000-12-20 | 2000-12-20 | Charger for serially connected batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00120608A CN1360385A (en) | 2000-12-20 | 2000-12-20 | Charger for serially connected batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1360385A true CN1360385A (en) | 2002-07-24 |
Family
ID=4588285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00120608A Pending CN1360385A (en) | 2000-12-20 | 2000-12-20 | Charger for serially connected batteries |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1360385A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107231024A (en) * | 2017-06-27 | 2017-10-03 | 广西科技大学 | The general charging method of button cell and charger |
| CN111092460A (en) * | 2018-10-23 | 2020-05-01 | Oppo广东移动通信有限公司 | Charging control method and device and computer storage medium |
| CN112217247A (en) * | 2020-08-23 | 2021-01-12 | 江西省世道新能源科技有限公司 | Energy storage equipment for lithium battery production and implementation method thereof |
| CN113162187A (en) * | 2021-05-06 | 2021-07-23 | 杭州海康机器人技术有限公司 | Charging control method, charger and storage medium |
-
2000
- 2000-12-20 CN CN00120608A patent/CN1360385A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107231024A (en) * | 2017-06-27 | 2017-10-03 | 广西科技大学 | The general charging method of button cell and charger |
| CN107231024B (en) * | 2017-06-27 | 2023-06-23 | 广西科技大学 | General charging method and charger for button cell |
| CN111092460A (en) * | 2018-10-23 | 2020-05-01 | Oppo广东移动通信有限公司 | Charging control method and device and computer storage medium |
| CN112217247A (en) * | 2020-08-23 | 2021-01-12 | 江西省世道新能源科技有限公司 | Energy storage equipment for lithium battery production and implementation method thereof |
| CN112217247B (en) * | 2020-08-23 | 2022-08-23 | 江西省世道新能源科技有限公司 | Energy storage equipment for lithium battery production and implementation method thereof |
| CN113162187A (en) * | 2021-05-06 | 2021-07-23 | 杭州海康机器人技术有限公司 | Charging control method, charger and storage medium |
| CN113162187B (en) * | 2021-05-06 | 2023-01-31 | 杭州海康机器人股份有限公司 | Charging control method, charger and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101976871B (en) | UPS (Uninterrupted Power Supply) power supply control circuit and UPS power supply | |
| CN101552479B (en) | Direct-current voltage reducing circuit | |
| CN102904450B (en) | Current mode insulation transmodulator | |
| CN101997324A (en) | Systems and methods for bi-directional energy delivery with galvanic isolation | |
| CN104811047A (en) | Bidirectional direct-current/direct-current converter and control method thereof | |
| CN102893488A (en) | Secondary-battery control device | |
| CN114050330A (en) | Battery system and power supply system | |
| CN102403906B (en) | Booster converter | |
| CN102918745A (en) | Solar cell system | |
| CN111231703B (en) | Charging and discharging control method and charging and discharging system for charging pile | |
| CN109075713A (en) | Bi-directional DC-DC current transformer and its control method | |
| CN104953696A (en) | On-line interactive uninterrupted power source | |
| CN105515101A (en) | Bidirectional power supply for lithium battery pack | |
| CN110601525A (en) | Integrated vehicle-mounted charging conversion system of new energy automobile | |
| CN210640722U (en) | Battery switch circuit and power supply management system comprising same | |
| CN110417268A (en) | Vehicular charger and electric vehicle | |
| CN111224419A (en) | Energy storage inverter | |
| CN110190654A (en) | High-power charging circuit and device | |
| CN101841233B (en) | Dynamic voltage compensation device based on AC/AC converter | |
| CN100440701C (en) | A current regulator for charging and discharging of superconducting magnet | |
| CN211127262U (en) | Current conversion circuit | |
| CN1360385A (en) | Charger for serially connected batteries | |
| CN204290428U (en) | A kind of integrate motor drives and battery charging function module | |
| CN109936194B (en) | Power supply circuit of battery management system | |
| CN208209591U (en) | A kind of battery voltage equalizing circuit based on transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |