CN203086196U - Multi-section series lithium battery equalization circuit - Google Patents
Multi-section series lithium battery equalization circuit Download PDFInfo
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- CN203086196U CN203086196U CN2013200223674U CN201320022367U CN203086196U CN 203086196 U CN203086196 U CN 203086196U CN 2013200223674 U CN2013200223674 U CN 2013200223674U CN 201320022367 U CN201320022367 U CN 201320022367U CN 203086196 U CN203086196 U CN 203086196U
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Abstract
The utility model relates to a multi-section series lithium battery equalization circuit which comprises a battery pack, a voltage detection circuit, a voltage comparison circuit, a control circuit and an equalization circuit. The multi-section series lithium battery equalization circuit is characterized in that the voltage detection circuit detects the voltages of both ends of each battery in the battery pack; the detected voltages are compared through the voltage comparison circuit; the control circuit control on and off of the equalization circuit through a comparison result; and finally the batteries are equalized by the equalization circuit. The multi-section series lithium battery equalization circuit provided by the utility model has the advantages that the multi-section series lithium battery equalization circuit has the characteristics of reasonable design, simple structure, low noise and total practicality, uses a stochastic control switch, is flexible, does not comprise an expensive lithium battery power supply management chip, and has a low circuit cost.
Description
Technical field
The utility model relates to a kind of equalizing circuit, especially relates to a kind of multi-section serial lithium battery equalizing circuit.
Background technology
In recent years, the fast development of portable type electronic product has promoted the update of battery technology.Lithium ion battery since its have high-energy-density, long-life, low self-discharge rate, characteristic such as pollution-free, become the main flow battery product in market rapidly.Current many world-renowned automobile factorys are devoted to use in the commercial city lithium battery exploitation pure electric automobile and hybrid vehicle.But in order to satisfy the high voltage requirements of high power vehicle, have to the cell use that is together in series, yet because the chemical condition between each battery cell is different, the isoparametric difference of capacity, voltage, cycle life as battery, cause battery in charge and discharge process, constantly to worsen, cause reduce greatly the useful life of battery, security performance also declines to a great extent.Equalization problem between series-connected cell bag cell becomes the key technology of restriction dynamic lithium battery development.
The shunt resistance method of being controlled by the lithium battery power management chip at present is the main mode of power brick being carried out balanced management, and this mode must combine with the power management chip of determining, involves great expense, and the circuit complexity is difficult to implement.And the acceptance equilibrium once startup can only be passive can not change very flexible artificially in time.
The utility model content
The utility model mainly is to solve the existing in prior technology technical problem; Provide a kind of employing STOCHASTIC CONTROL switch, a kind of multi-section serial lithium battery equalizing circuit that flexibility is good.
It is to solve the existing in prior technology technical problem that the utility model also has a purpose; Provide a kind of expensive lithium battery power management chip that do not include, a kind of multi-section serial lithium battery equalizing circuit and equalization methods that circuit cost is low.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals:
A kind of multi-section serial lithium battery equalizing circuit is characterized in that,
One tested power brick: be composed in series by at least two joint lithium batteries;
One voltage detecting circuit: the voltage that detects the two ends of each batteries in the power brick;
One voltage comparator circuit: the voltage at the two ends of detected each batteries of voltage detecting circuit is compared;
One voltage control circuit: by the break-make of comparative result control equalizing circuit;
One equalizing circuit: the lithium battery that respectively saves in the tested power brick is carried out equilibrium;
Wherein, voltage detecting circuit, voltage comparator circuit, voltage control circuit and equalizing circuit connect successively; Voltage detecting circuit also is connected with tested power brick respectively with equalizing circuit.
At above-mentioned a kind of multi-section serial lithium battery equalizing circuit, described power brick is composed in series by at least two joint lithium batteries, i.e. battery BT1 and battery BT2; The negative pole of battery BT1 links to each other with ground, and the positive pole of battery BT1 links to each other with voltage detecting circuit with the negative pole of battery BT2 respectively; The negative pole of battery BT2 links to each other with the positive pole of battery BT1, and the positive pole of battery BT2 links to each other with voltage detecting circuit.
At above-mentioned a kind of multi-section serial lithium battery equalizing circuit, described voltage detecting circuit comprises that operational amplifier A 1 ~ A5 and resistance R 1 ~ R7 constitute, wherein the equal and opposite in direction of each resistance; The positive pole of above-mentioned battery BT1 links to each other with the in-phase input end of operational amplifier A 1 in the voltage detecting circuit with the negative pole of battery BT2 respectively; The in-phase input end of the operational amplifier A 2 in the positive pole of battery BT2 and the voltage detecting circuit links to each other; The in-phase input end of operational amplifier A 1, A2 links to each other with the positive pole of BT1 and BT2 respectively, and inverting input links to each other with the output of oneself respectively, constitutes voltage follower, and the output end voltage VO1 of operational amplifier A 1 is the voltage of BT1; The normal phase input end of operational amplifier A 3 links to each other with ground, and inverting input links to each other with R2 one end with resistance R 1 respectively, and output links to each other with the other end of resistance R 2, constitutes voltage inverter; The normal phase input end of operational amplifier A 4 links to each other with ground, and inverting input links to each other with the end of resistance R 3, R4 and R5 respectively, and output links to each other with the other end of resistance R 5, constitutes the voltage summing circuit; The normal phase input end of operational amplifier A 5 links to each other with ground, and inverting input links to each other with the end of resistance R 6 and R7 respectively, and output links to each other with the other end of resistance R 7, constitutes voltage inverter; The output end voltage VO2 of operational amplifier A 5 is the voltage of battery BT2.
At above-mentioned a kind of multi-section serial lithium battery equalizing circuit, described voltage comparator circuit comprises voltage comparator M1, the anode of voltage comparator M1 links to each other with the output VO2 of operational amplifier A 5, the negative terminal of voltage comparator M1 links to each other with the output VO1 of operational amplifier A 1, the output of voltage comparator links to each other with an end of a capacitor C 1, it compares two magnitudes of voltage of input, if output VO2 then exports high level greater than output VO1, on the contrary output low level then; One end of capacitor C 1 links to each other with the output of M1, and the other end then links to each other with ground, and it filters the noise signal of voltage comparator M1 output.
At above-mentioned a kind of multi-section serial lithium battery equalizing circuit, described voltage control circuit comprises P type metal-oxide-semiconductor Q1, P type metal-oxide-semiconductor Q2 and P type metal-oxide-semiconductor Q3;
The source electrode of P type metal-oxide-semiconductor Q1 links to each other with the output VO3 of comparator M1, and grid links to each other with the output of the D3 of a d type flip flop, and drain electrode links to each other with the pulse input end of d type flip flop, and it is controlling the break-make of The whole control circuit; 3 d type flip flop D1, D2 and D3 join end to end successively, constitute 3 ring counters, and wherein the initial setting state is 001, and its control equalizing circuit is to battery balanced number of times; The cutter of a disconnected bit switch in center links to each other with the drain electrode of P type metal-oxide-semiconductor Q1, throws H, OFF and links to each other with positive pole, high-impedance state and the ground of battery BT1 successively with L for three of a SP3T switch;
The source electrode of P type metal-oxide-semiconductor Q2 links to each other with the positive pole of battery BT2, and grid links to each other with the output of d type flip flop D3, and drain electrode links to each other with equalizing circuit, and it is the switch of control BT2 equalizing circuit;
The source electrode of P type metal-oxide-semiconductor Q3 links to each other with the positive pole of battery BT1, and grid links to each other with the output of d type flip flop D3, and drain electrode links to each other with equalizing circuit, and it is the switch of control BT1 equalizing circuit.
At above-mentioned a kind of multi-section serial lithium battery equalizing circuit, described equalizing circuit comprises N type metal-oxide-semiconductor Q4 and P type metal-oxide-semiconductor Q5; The drain electrode of above-mentioned P type metal-oxide-semiconductor Q2 links to each other with the drain electrode of N type metal-oxide-semiconductor Q4; The drain electrode of above-mentioned P type metal-oxide-semiconductor Q3 links to each other with the source electrode of P type metal-oxide-semiconductor Q5;
The drain electrode of described N type metal-oxide-semiconductor Q4 links to each other with the drain electrode of P type metal-oxide-semiconductor Q2, and grid links to each other with the output VO3 of comparator M1, and source electrode links to each other with resistance R 8 one ends, and it constitutes the equalizing circuit of BT2 with resistance R 8; P type metal-oxide-semiconductor Q5 source electrode links to each other with the drain electrode of P type metal-oxide-semiconductor Q3, and grid links to each other with the output VO3 of comparator M1, and drain electrode links to each other with resistance R 9 one ends; It constitutes the equalizing circuit of BT1 with R9; The other end of described resistance R 8 and resistance R 9 all links to each other with ground.
Therefore, the utlity model has following advantage: 1. reasonable in design, simple in structure, the less and complete practical .2. employing STOCHASTIC CONTROL switch of noise, flexibility is good.3. do not include expensive lithium battery power management chip, circuit cost is low.
Description of drawings
Fig. 1 is an overall circuit structure chart of the present utility model.
Fig. 2 is the circuit structure diagram of the utility model power brick and voltage detecting circuit.
Fig. 3 is the circuit structure diagram of the utility model voltage comparator circuit.
Fig. 4 is the circuit structure diagram of the utility model control circuit and equalizing circuit.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment:
Two save the serial lithium battery equalizing circuits as shown in Figure 1, and its composition comprises power brick, voltage detecting circuit, voltage comparator circuit, control circuit and equalizing circuit.Wherein: power brick links to each other with equalizing circuit with voltage detecting circuit; Voltage detecting circuit links to each other with voltage comparator circuit with power brick; Voltage comparator circuit links to each other with control circuit with voltage detecting circuit; Control circuit links to each other with equalizing circuit with voltage comparator circuit; Equalizing circuit links to each other with power brick with control circuit.Voltage detecting circuit detects the voltage at the two ends of each batteries in the power brick, and detected voltage compares by voltage comparator circuit, and control circuit is then by the break-make of comparative result control equalizing circuit, and last equalizing circuit carries out equilibrium to battery.
Fig. 2 is power brick and voltage detecting circuit connection diagram.Power brick is made of two joint lithium battery BT1 and BT2 series connection.The negative pole of battery BT1 links to each other with ground, and the positive pole of battery BT1 links to each other with the in-phase input end of operational amplifier A 1 in the voltage detecting circuit with the negative pole of battery BT2 respectively.The negative pole of battery BT2 links to each other with the positive pole of battery BT1, and the in-phase input end of the operational amplifier A 2 in the positive pole of battery BT2 and the voltage detecting circuit links to each other.Voltage detecting circuit is made of operational amplifier A 1 ~ A5 and resistance R 1 ~ R7, wherein the equal and opposite in direction of each resistance.The in-phase input end of operational amplifier A 1, A2 links to each other with the positive pole of BT1 and BT2 respectively, and inverting input links to each other with the output of oneself respectively, constitutes voltage follower thus, and the output end voltage VO1 of operational amplifier A 1 is the voltage of BT1; The normal phase input end of operational amplifier A 3 links to each other with ground, and inverting input links to each other with R2 one end with resistance R 1 respectively, and output links to each other with the other end of resistance R 2, constitutes a voltage inverter; The normal phase input end of operational amplifier A 4 links to each other with ground, and inverting input links to each other with the end of resistance R 3, R4 and R5 respectively, and output links to each other with the other end of resistance R 5, constitutes the voltage summing circuit thus; The normal phase input end of operational amplifier A 5 links to each other with ground, inverting input links to each other with the end of resistance R 6 and R7 respectively, output links to each other with the other end of resistance R 7, constitutes a voltage inverter thus, and the output end voltage VO2 of operational amplifier A 5 is the voltage of BT2.
Fig. 3 is the voltage comparator circuit connection diagram.The anode of voltage comparator M1 links to each other with the output VO2 of operational amplifier A 5, the negative terminal of voltage comparator M1 links to each other with the output VO1 of operational amplifier A 1, the output of voltage comparator links to each other with an end of capacitor C 1, it compares two magnitudes of voltage of input, if VO2 then exports high level greater than VO1, on the contrary output low level then.One end of capacitor C 1 links to each other with the output of M1, and the other end then links to each other with ground, and it filters the noise signal of M1 output.
Fig. 4 is control circuit and equalizing circuit connection diagram.The source electrode of P type metal-oxide-semiconductor Q1 links to each other with the output VO3 of comparator M1, and grid links to each other with the output of d type flip flop D3, and drain electrode links to each other with the pulse input end of d type flip flop, and it is controlling the break-make of The whole control circuit; 3 d type flip flop D1, D2 and D3 join end to end successively, constitute 3 ring counters, and wherein the initial setting state is 001, and its control equalizing circuit is to battery balanced number of times; The cutter of the disconnected bit switch in center links to each other with the drain electrode of Q1, throws H, OFF for 3 and links to each other with positive pole, high-impedance state and the ground of BT1 successively with L, and switch links to each other with OFF when not working, and it is to manually start balanced switch; The source electrode of P type metal-oxide-semiconductor Q2 links to each other with the positive pole of BT2, and grid links to each other with the output of D3, and drain electrode links to each other with the drain electrode of Q4, and it is the switch of control BT2 equalizing circuit; The source electrode of P type metal-oxide-semiconductor Q3 links to each other with the positive pole of BT1, and grid links to each other with the output of D3, and drain electrode links to each other with the source electrode of Q5, and it is the switch of control BT1 equalizing circuit; The drain electrode of N type metal-oxide-semiconductor Q4 links to each other with the drain electrode of Q2, and grid links to each other with VO3, and source electrode links to each other with resistance R 8 one ends, and it constitutes the equalizing circuit of BT2 with R8; P type metal-oxide-semiconductor Q5 source electrode links to each other with the drain electrode of Q3, and grid links to each other with VO3, and drain electrode links to each other with resistance R 9 one ends, and it constitutes the equalizing circuit of BT1 with R9; The other end of resistance R 8 and R9 all links to each other with ground.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Claims (6)
1. a multi-section serial lithium battery equalizing circuit is characterized in that,
One tested power brick: be composed in series by at least two joint lithium batteries;
One voltage detecting circuit: the voltage that detects the two ends of each batteries in the power brick;
One voltage comparator circuit: the voltage at the two ends of detected each batteries of voltage detecting circuit is compared;
One voltage control circuit: by the break-make of comparative result control equalizing circuit;
One equalizing circuit: the lithium battery that respectively saves in the tested power brick is carried out equilibrium;
Wherein, voltage detecting circuit, voltage comparator circuit, voltage control circuit and equalizing circuit connect successively; Voltage detecting circuit also is connected with tested power brick respectively with equalizing circuit.
2. a kind of multi-section serial lithium battery equalizing circuit according to claim 1 is characterized in that, described power brick is composed in series by at least two joint lithium batteries, i.e. battery BT1 and battery BT2; The negative pole of battery BT1 links to each other with ground, and the positive pole of battery BT1 links to each other with voltage detecting circuit with the negative pole of battery BT2 respectively; The negative pole of battery BT2 links to each other with the positive pole of battery BT1, and the positive pole of battery BT2 links to each other with voltage detecting circuit.
3. a kind of multi-section serial lithium battery equalizing circuit according to claim 2 is characterized in that, described voltage detecting circuit comprises that operational amplifier A 1 ~ A5 and resistance R 1 ~ R7 constitute, wherein the equal and opposite in direction of each resistance; The positive pole of above-mentioned battery BT1 links to each other with the in-phase input end of operational amplifier A 1 in the voltage detecting circuit with the negative pole of battery BT2 respectively; The in-phase input end of the operational amplifier A 2 in the positive pole of battery BT2 and the voltage detecting circuit links to each other; The in-phase input end of operational amplifier A 1, A2 links to each other with the positive pole of BT1 and BT2 respectively, and inverting input links to each other with the output of oneself respectively, constitutes voltage follower, and the output end voltage VO1 of operational amplifier A 1 is the voltage of BT1; The normal phase input end of operational amplifier A 3 links to each other with ground, and inverting input links to each other with R2 one end with resistance R 1 respectively, and output links to each other with the other end of resistance R 2, constitutes voltage inverter; The normal phase input end of operational amplifier A 4 links to each other with ground, and inverting input links to each other with the end of resistance R 3, R4 and R5 respectively, and output links to each other with the other end of resistance R 5, constitutes the voltage summing circuit; The normal phase input end of operational amplifier A 5 links to each other with ground, and inverting input links to each other with the end of resistance R 6 and R7 respectively, and output links to each other with the other end of resistance R 7, constitutes voltage inverter; The output end voltage VO2 of operational amplifier A 5 is the voltage of battery BT2.
4. a kind of multi-section serial lithium battery equalizing circuit according to claim 3, it is characterized in that, described voltage comparator circuit comprises voltage comparator M1, the anode of voltage comparator M1 links to each other with the output VO2 of operational amplifier A 5, the negative terminal of voltage comparator M1 links to each other with the output VO1 of operational amplifier A 1, and the output of voltage comparator links to each other with an end of a capacitor C 1; One end of capacitor C 1 links to each other with the output of M1, and the other end then links to each other with ground, and it filters the noise signal of voltage comparator M1 output.
5. a kind of multi-section serial lithium battery equalizing circuit according to claim 4 is characterized in that, described voltage control circuit comprises P type metal-oxide-semiconductor Q1, P type metal-oxide-semiconductor Q2 and P type metal-oxide-semiconductor Q3;
The source electrode of P type metal-oxide-semiconductor Q1 links to each other with the output VO3 of comparator M1, and grid links to each other with the output of the D3 of a d type flip flop, and drain electrode links to each other with the pulse input end of d type flip flop; 3 d type flip flop D1, D2 and D3 join end to end successively, constitute 3 ring counters; The cutter of a disconnected bit switch in center links to each other with the drain electrode of P type metal-oxide-semiconductor Q1, throws H, OFF and links to each other with positive pole, high-impedance state and the ground of battery BT1 successively with L for three of a SP3T switch;
The source electrode of P type metal-oxide-semiconductor Q2 links to each other with the positive pole of battery BT2, and grid links to each other with the output of d type flip flop D3, and drain electrode links to each other with equalizing circuit;
The source electrode of P type metal-oxide-semiconductor Q3 links to each other with the positive pole of battery BT1, and grid links to each other with the output of d type flip flop D3, and drain electrode links to each other with equalizing circuit.
6. a kind of multi-section serial lithium battery equalizing circuit according to claim 5 is characterized in that, described equalizing circuit comprises N type metal-oxide-semiconductor Q4 and P type metal-oxide-semiconductor Q5; The drain electrode of above-mentioned P type metal-oxide-semiconductor Q2 links to each other with the drain electrode of N type metal-oxide-semiconductor Q4; The drain electrode of above-mentioned P type metal-oxide-semiconductor Q3 links to each other with the source electrode of P type metal-oxide-semiconductor Q5;
The drain electrode of described N type metal-oxide-semiconductor Q4 links to each other with the drain electrode of P type metal-oxide-semiconductor Q2, and grid links to each other with the output VO3 of comparator M1, and source electrode links to each other with resistance R 8 one ends; P type metal-oxide-semiconductor Q5 source electrode links to each other with the drain electrode of P type metal-oxide-semiconductor Q3, and grid links to each other with the output VO3 of comparator M1, and drain electrode links to each other with resistance R 9 one ends; The other end of described resistance R 8 and resistance R 9 all links to each other with ground.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200223674U CN203086196U (en) | 2013-01-16 | 2013-01-16 | Multi-section series lithium battery equalization circuit |
| CN201310015616.1A CN103051033B (en) | 2013-01-16 | 2013-01-16 | Multi-section series connection lithium battery equalizing method and multi-section series connection lithium battery equalizing circuit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200223674U CN203086196U (en) | 2013-01-16 | 2013-01-16 | Multi-section series lithium battery equalization circuit |
| CN201310015616.1A CN103051033B (en) | 2013-01-16 | 2013-01-16 | Multi-section series connection lithium battery equalizing method and multi-section series connection lithium battery equalizing circuit |
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| CN203086196U true CN203086196U (en) | 2013-07-24 |
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| CN201310015616.1A Expired - Fee Related CN103051033B (en) | 2013-01-16 | 2013-01-16 | Multi-section series connection lithium battery equalizing method and multi-section series connection lithium battery equalizing circuit |
| CN2013200223674U Expired - Fee Related CN203086196U (en) | 2013-01-16 | 2013-01-16 | Multi-section series lithium battery equalization circuit |
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| CN201310015616.1A Expired - Fee Related CN103051033B (en) | 2013-01-16 | 2013-01-16 | Multi-section series connection lithium battery equalizing method and multi-section series connection lithium battery equalizing circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051033A (en) * | 2013-01-16 | 2013-04-17 | 武汉大学苏州研究院 | Multi-section series connection lithium battery equalizing method and multi-section series connection lithium battery equalizing circuit |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227492B (en) * | 2013-05-07 | 2015-07-01 | 国家电网公司 | Charging equalization control circuit of battery pack |
| CN103269108B (en) * | 2013-06-04 | 2015-04-29 | 奇瑞汽车股份有限公司 | Battery power equalization circuit |
| CN104935051A (en) * | 2015-06-30 | 2015-09-23 | 深圳市理邦精密仪器股份有限公司 | A series battery equalization circuit |
| CN109298350B (en) * | 2018-09-28 | 2020-11-03 | 广东电网有限责任公司 | Battery consistency detection device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2092627B1 (en) * | 2006-11-10 | 2018-05-23 | Lithium Balance A/S | A battery management system |
| CN101017986B (en) * | 2006-12-29 | 2010-05-19 | 哈尔滨工业大学 | Balancer in the charging/discharging process of the dynamic battery group |
| CN102355017A (en) * | 2011-09-09 | 2012-02-15 | 河海大学常州校区 | Lossless power battery equalizer |
| CN103051033B (en) * | 2013-01-16 | 2014-09-17 | 武汉大学苏州研究院 | Multi-section series connection lithium battery equalizing method and multi-section series connection lithium battery equalizing circuit |
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2013
- 2013-01-16 CN CN201310015616.1A patent/CN103051033B/en not_active Expired - Fee Related
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051033A (en) * | 2013-01-16 | 2013-04-17 | 武汉大学苏州研究院 | Multi-section series connection lithium battery equalizing method and multi-section series connection lithium battery equalizing circuit |
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| Publication number | Publication date |
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| CN103051033A (en) | 2013-04-17 |
| CN103051033B (en) | 2014-09-17 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20130724 Termination date: 20190116 |
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| CF01 | Termination of patent right due to non-payment of annual fee |