CN202076812U - Serial-discharging parallel-charging secondary power battery pack - Google Patents
Serial-discharging parallel-charging secondary power battery pack Download PDFInfo
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- CN202076812U CN202076812U CN2011200866097U CN201120086609U CN202076812U CN 202076812 U CN202076812 U CN 202076812U CN 2011200866097 U CN2011200866097 U CN 2011200866097U CN 201120086609 U CN201120086609 U CN 201120086609U CN 202076812 U CN202076812 U CN 202076812U
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Abstract
The utility model discloses a serial-discharging parallel-charging secondary power battery pack and relates to a secondary battery pack. The serial-discharging parallel-charging secondary power battery pack comprises a secondary battery pack which consists of at least two cells, a primary protection circuit with a built-in switch matrix, a switching-type charging management circuit, a high-power synchronous voltage reducing circuit and an output power monitoring circuit, wherein the current input interface of the switch matrix is connected with the current output interface of the charging management circuit and the current input interface of the charging management circuit is connected with a charger; the current output interface of the switch matrix is connected with the current input interface of the high-power synchronous voltage reducing circuit and the current output interface of the high-power synchronous voltage reducing circuit is connected with an external load; and the monitoring signal connection port of the switch matrix is connected with the signal output port of the output power monitoring circuit, the signal input port of the output power monitoring circuit is connected with the circuit of the external load and the output signal of the output power monitoring circuit is electrically connected with the voltage feedback signal of the high-power synchronous voltage reducing circuit. The serial-discharging parallel-charging secondary power battery pack has the advantages of high reliability and long service life.
Description
Technical field
The utility model relates to secondary battery, relates in particular to the secondary power battery pack that a kind of string is put and filled.
Background technology
The power battery pack of electric motor car or electric tool, major part all are to adopt the more piece secondary cell to realize by the connection in series-parallel combination.Battery pack after these combinations, because the otherness of individual electric core, the bank capability and the life-span that can cause integral battery door pool-size and life-span can not show a candle to calculating in theory.There have been at present both at home and abroad the pairing, charge and discharge balancing, the protection of monomer electricity core etc. of electric core in the battery pack to improve battery performance.When battery capacity was very high, the control system circuit was just complicated day by day, the circuit cost height, and the reliability demonstration time is long, is unfavorable for the product fast development.
The utility model content
The utility model aims to provide the secondary power battery pack that a kind of string is put and filled at the deficiency of above-mentioned technical problem, realizes the high reliability of secondary battery and prolongs its useful life.
The utility model is achieved through the following technical solutions: the secondary power battery pack that a kind of string is put and filled comprises the secondary battery of at least two electric cores compositions, a protective circuit, switching regulator charge management circuit, high-power synchronous buck circuit and the power output supervisory circuit of built-in switch matrix; Each electric core is electrically connected respectively and follows a current interface of a protective circuit; A protective circuit of described built-in switch matrix is provided with switch matrix electric current input interface and switch matrix electric current output interface, described charge management circuit is provided with charge management circuit electric current input interface and charge management circuit electric current output interface, described high-power synchronous buck circuit is provided with high-power synchronous buck circuital current input interface and high-power synchronous buck circuital current output interface, and described power output supervisory circuit is provided with power output supervisory circuit signal input port and power output supervisory circuit signal output port; Wherein, described switch matrix electric current input interface is electrically connected with described charge management circuit electric current output interface, and described charge management circuit electric current input interface is electrically connected with described charger; Described switch matrix electric current output interface is electrically connected with described high-power synchronous buck circuital current input interface, and described high-power synchronous buck circuital current output interface is electrically connected with external load; The pilot signal connectivity port of described switch matrix is connected with described power output supervisory circuit signal output port signal, described power output supervisory circuit signal input port is connected with the circuit signal of described external load, and described power output supervisory circuit output signal is electrically connected with the voltage feedback signal of described high-power synchronous buck circuit.
Below above technical scheme is further elaborated:
A described protective circuit comprises the super-charge super-discharge short circuit over-current protection circuit, discharge and recharge channel switching circuit and discharge bypass channel ON-OFF control circuit, described super-charge super-discharge short circuit over-current protection circuit, discharges and recharges channel switching circuit and discharge bypass channel ON-OFF control circuit is connected in series successively.
The electric core of described composition secondary battery is three.
The beneficial effects of the utility model are: one, the utility model are realized a kind of highly reliable and long-life power battery pack based on the single-unit lithium cell charging administrative skill and the high-power synchronous buck constant-current drive circuit technology of maturation.This battery pack adopts more piece electricity core to carry the battery series connection of a protective circuit, realizes big current constant voltage discharge by high-power synchronous buck circuit, and automatic constant current during heavy duty is closed discharge channel when the power output supervisory circuit detects short circuit and overload; Single battery discharged into when putting the protection electrical voltage point, and the automatic disconnection discharge switch is opened by-pass switch, provided other batteries to continue the passage of discharge.During charging; the battery pack inner control circuit passes through switch matrix; the series connected battery negative pole is received the charger negative pole; positive pole is received the charger positive pole by charge management circuit independently separately, realizes reliable trickle charge, quick charge and the over-charge protective of each batteries by the charge management circuit of maturation.In addition, the battery power discharge circuit provides the circuit interface that the maximum constant operating current can be set, and is used for the output loading equilibrium during for the combination in parallel of a plurality of same battery pack, realizes higher current density.This device can be used to pile up the power battery pack device of the bigger capacity of realization further by series connection in parallel; When two, the utility model had been avoided the conventional batteries discharge, a batteries discharge prevention was promptly closed discharge channel, causes other batteries to have electricity also not have discharge channel.The utility model does not use complicated equalization discharge circuit, by the by-pass switch of control battery, provides the discharge channel of other batteries in the battery pack automatically, all batteries can be worked be put the protection electrical voltage point; Three, by charged in parallel, each battery adopts independently charge management circuit, can utilize mature technique to realize the reliable charging at a high speed of electric core, need not complicated charge balancing, realizes than the better charging performance of general charge balancing; Four, by the multiple batteries series connection, by high-power synchronous buck circuit step-down output, can use non-electrokinetic cell to realize the large current load performance of electrokinetic cell again, reduce the battery pack cost significantly; Five, can be further and tandem compound, realize more jumbo battery pack.
Description of drawings
Fig. 1 is a circuit frame principle figure of the present utility model;
Fig. 2 is a protective circuit of the present utility model and switch matrix circuit figure;
Fig. 3-Fig. 5 is the utility model intelligent switch formula charging circuit;
Fig. 6 is high power switch reduction voltage circuit and protection monitoring management circuit.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
With reference to shown in Figure 1, electric core BAT1/BAT2/BAT3 of the present utility model inserts the switch matrix 5 that IC1/IC2/IC3 constitutes respectively earlier, realizes management of charging and discharging and various protection action.Through after the protective circuit; send discharge channel interface VBAT1+/VBAT1-, VBAT2+/VBAT2-, VBAT3+/VBAT3-respectively; charge tunnel interface VCHG1+/VCHG1-, VCHG2+/VCHG2-, VCHG3+/VCHG3-, and charging control signal CHR_EN1, CHR_EN2, CHR_EN3.When effectively not being connected with charger 8, circuit working is at electric core BAT1/BAT2/BAT3 discharged in series state.Intelligence control circuit IC8 starts the high frequency switch type reduction voltage circuit that IC7 constitutes, and 3.6V/20A is to external loading in output.When external charger 8 effectively connects, the intelligence control circuit that IC8 constitutes is sent the CHARGER_EN signal, is converted to CHR_EN1, CHR_EN2, CHR_EN3 by interface circuit, start the charge switch passage of IC1/IC2/IC3, transfer electric core BAT1/BAT2/BAT3 to parallel connection by series connection.Simultaneously, the switch-type voltage-dropping charging circuit of IC4/IC5/IC6 formation begins electric core BAT1/BAT2/BAT3 is carried out the high speed charging respectively.
With reference to shown in Figure 2, IC1 control K1-A/K1-B/K1-C/K1-D/KP1-A constitutes protective circuit 4 of electric core BAT1 and switch matrix 5.The specific implementation logical description is as follows: when electric core BAT1 crosses when putting, electric core BAT1 voltage is lower than IC1 to be set and put the protection electrical voltage point, and IC1 promptly controls K1-A/K1-D and disconnects, and discharge channel disconnects fully.Realized putting protection.When electric core BAT1 overcharged, electric core BAT1 voltage was higher than IC1 and sets the over-charge protective electrical voltage point, and IC1 promptly controls K1-B/K1-C and disconnects, and the charging electric channel disconnects fully.Realize over-charge protective.When electric core BAT1 discharged, the electric current that electric core BAT1 flows through K1-A/K1-D surpassed IC1 setting over-current protection point, and IC1 promptly controls K1-A/K1-D and disconnects, and discharge channel disconnects fully.Realize the discharge overcurrent protection.When electric core BAT1 discharged, the electric current that electric core BAT1 flows through K1-A/K1-D surpassed IC1 setting over-current protection point, and IC1 promptly controls K1-A/K1-D and disconnects, and discharge channel disconnects fully.Realize the discharge overcurrent protection.When electric core BAT1 discharged, the electric current that electric core BAT1 flows through K1-A/K1-D surpassed IC1 setting short-circuit protection point, and IC1 promptly controls K1-A/K1-D and disconnects, and discharge channel disconnects fully.The protection of realization discharge short.When electric core BAT1 crosses when putting, electric core BAT1 voltage is lower than IC1 to be set and put the protection electrical voltage point, and IC1 promptly controls K1-A/K1-D and disconnects, and discharge channel disconnects fully; Simultaneously, electric core BAT1 opens the KP1-A switch, and bypass VBAT1-is to VBAT1+, for other series electrical cores in the battery pack provide discharge channel.When the CHR_EN1 signal was effective, IC1 control disconnected K1-A/K1-D, opens K1-B/K1-C, switches to charge tunnel by discharge channel.
With reference to Fig. 3-shown in Figure 5, IC4/IC5/IC6 constitutes intelligent switch formula charging circuit of the present utility model, respectively electric core BAT1/BAT2/BAT3 is charged.With the IC4 circuit is example, and management is described below to intelligent charge: when charging voltage is 5～36V scope, by inductance L 2 switch step-downs, transfers the following charging voltage of 4.2V to electric core is charged automatically.When electric core voltage during less than 2.9V, circuit enters the trickle charge state, to electric core 0.1C low current charge, reaches 2.9V up to voltage.When electricity core voltage reached 2.9V, circuit entered the constant current charge state, and this circuit design is that 5C fills soon, and being charged to electric core voltage is that 4.2V stops charging.After electricity core voltage reached 4.2V, circuit entered the constant voltage charge state, keeps the 4.2V charging voltage electric core is charged, and stops charging up to charging current less than 0.1C.
Fig. 6 is the circuit theory diagrams of high power switch formula reduction voltage circuit and power output supervisory circuit.Resistance R 12/R11/R10/R13 constitutes electric core VBAT1/VBAT2/VBAT3 discharged in series passage, and 3 economize on electricity core VBAT1/VBAT2/VBAT3 obtain the input power supply VIN of high-power synchronous buck circuit through after connecting.VCHG is the charging input voltage.When VCHG was effective, IC8 can send the CHAGER_OK signal, made the discharge switch matrix of IC1/IC2/IC3 transfer the charge switch matrix to.Simultaneously, VCHG also powers to VIN by D4, makes IC7 continue to keep operating state.When VIN voltage met the requirements of magnitude of voltage, IC8 sent the POWER_ON signal, opened Q4, made the Q3 conducting, made the supply power voltage VCC of IC7 that electricity be arranged, and IC8 starts working.IC8 constitutes high-power synchronous buck circuit together by Q1/Q2 and L1, and output VOUT through current sense resistor R14, obtains exporting VOUT+, external load.IC8 obtains the external load realtime power by terminal voltage and the electric current of high-precision adc detection R14.When the power output supervisory circuit detected output current above set point, IC8 can pass through the VFB network, and control IC 7 reduces output voltages, and the output current that is maintained to external load is constant.When output voltage was lower than the short-circuit protection set point, IC7 output POWER_ON signal low level was closed IC8, closes discharge channel, enters the short-circuit protection pattern.IC8 is real-time monitoring circuit and the hot state of electric core in charge and discharge process, when electric core or circuit temperature are too high, and charge closing or discharge in real time.Indexs such as IC8 real-time detection circuit power output, electric core voltage, electric core temperature, internal circuit plate temperature report to external system by the CAN bus, also can accept external system instruction by the CAN bus, open or stop charging, open or stop discharge.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the utility model is not limited to also should fall in the protection range of claim of the present utility model modifications and changes more of the present utility model.In addition, although used some specific terms in this specification, these terms do not constitute any restriction to the utility model just for convenience of description.
Claims (3)
1. the secondary power battery pack that string is put and filled is characterized in that: comprise the secondary battery of two electric cores compositions, a protective circuit, switching regulator charge management circuit, high-power synchronous buck circuit and the power output supervisory circuit of built-in switch matrix at least; Each electric core is electrically connected respectively and follows a current interface of a protective circuit;
A protective circuit of described built-in switch matrix is provided with switch matrix electric current input interface and switch matrix electric current output interface, described charge management circuit is provided with charge management circuit electric current input interface and charge management circuit electric current output interface, described high-power synchronous buck circuit is provided with high-power synchronous buck circuital current input interface and high-power synchronous buck circuital current output interface, and described power output supervisory circuit is provided with power output supervisory circuit signal input port and power output supervisory circuit signal output port;
Wherein, described switch matrix electric current input interface is electrically connected with described charge management circuit electric current output interface, and described charge management circuit electric current input interface is electrically connected with described charger; Described switch matrix electric current output interface is electrically connected with described high-power synchronous buck circuital current input interface, and described high-power synchronous buck circuital current output interface is electrically connected with external load; The pilot signal connectivity port of described switch matrix is connected with described power output supervisory circuit signal output port signal, described power output supervisory circuit signal input port is connected with the circuit signal of described external load, and described power output supervisory circuit output signal is electrically connected with the voltage feedback signal of described high-power synchronous buck circuit.
2. the secondary power battery pack that string according to claim 1 is put and filled; it is characterized in that: a described protective circuit comprises the super-charge super-discharge short circuit over-current protection circuit, discharge and recharge channel switching circuit and discharge bypass channel ON-OFF control circuit, described super-charge super-discharge short circuit over-current protection circuit, discharges and recharges channel switching circuit and discharge bypass channel ON-OFF control circuit is connected in series successively.
3. the secondary power battery pack that string according to claim 1 is put and filled is characterized in that: the electric core of described composition secondary battery is three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200866097U CN202076812U (en) | 2011-03-28 | 2011-03-28 | Serial-discharging parallel-charging secondary power battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200866097U CN202076812U (en) | 2011-03-28 | 2011-03-28 | Serial-discharging parallel-charging secondary power battery pack |
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| Publication Number | Publication Date |
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| CN202076812U true CN202076812U (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200866097U Expired - Fee Related CN202076812U (en) | 2011-03-28 | 2011-03-28 | Serial-discharging parallel-charging secondary power battery pack |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762638A (en) * | 2014-01-10 | 2014-04-30 | 曹小兵 | Voltage divider of electric vehicle and control method thereof |
| CN104917155A (en) * | 2015-07-01 | 2015-09-16 | 重庆新御成科技有限公司 | Battery protection method and apparatus |
| CN106160082A (en) * | 2016-07-13 | 2016-11-23 | 刘仲尧 | A kind of differential lithium battery group |
| CN106601977A (en) * | 2017-01-03 | 2017-04-26 | 奇酷互联网络科技（深圳）有限公司 | Battery, electronic equipment and charging control method |
| CN116031986A (en) * | 2023-03-27 | 2023-04-28 | 深圳市安仕新能源科技有限公司 | Battery management system and battery management method |
-
2011
- 2011-03-28 CN CN2011200866097U patent/CN202076812U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103762638A (en) * | 2014-01-10 | 2014-04-30 | 曹小兵 | Voltage divider of electric vehicle and control method thereof |
| CN104917155A (en) * | 2015-07-01 | 2015-09-16 | 重庆新御成科技有限公司 | Battery protection method and apparatus |
| CN106160082A (en) * | 2016-07-13 | 2016-11-23 | 刘仲尧 | A kind of differential lithium battery group |
| CN106601977A (en) * | 2017-01-03 | 2017-04-26 | 奇酷互联网络科技（深圳）有限公司 | Battery, electronic equipment and charging control method |
| CN106601977B (en) * | 2017-01-03 | 2019-08-02 | 奇酷互联网络科技（深圳）有限公司 | Battery, electronic equipment and charge control method |
| CN116031986A (en) * | 2023-03-27 | 2023-04-28 | 深圳市安仕新能源科技有限公司 | Battery management system and battery management method |
| CN116031986B (en) * | 2023-03-27 | 2023-07-18 | 深圳市安仕新能源科技有限公司 | Battery management system and battery management method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20130328 |