CN202940606U - Adjustable-current battery pack equalization circuit - Google Patents
Adjustable-current battery pack equalization circuit Download PDFInfo
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- CN202940606U CN202940606U CN 201220558655 CN201220558655U CN202940606U CN 202940606 U CN202940606 U CN 202940606U CN 201220558655 CN201220558655 CN 201220558655 CN 201220558655 U CN201220558655 U CN 201220558655U CN 202940606 U CN202940606 U CN 202940606U
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Abstract
The utility model relates to an adjustable-current battery pack equalization circuit. A battery pack comprises more than two battery units, a battery unit comprises a single battery or more than two single batteries which are connected in series or in parallel. The adjustable-current battery pack equalization circuit comprises an equalization controller and a plurality of adjustable equalization sub-circuits, wherein two ends of each single battery are connected in parallel with the adjustable equalization sub-circuits, and the adjustable equalization sub-circuits are respectively connected with the equalization controller. The adjustable-current battery pack equalization circuit can effectively inhibit phenomena of over-charging and over-discharging of the battery unit in the series battery pack, improves consistency of the battery pack in relatively short time, prolongs service life of the battery pack finally and has properties of obvious equalization effects and wide application scope.
Description
Technical field
The utility model relates to a kind of circuit of battery pack balancing, relates in particular to a kind of active equalization circuit that is applied to the adjustable current of series battery.
Background technology
Cell causes the difference of each battery capacity and performance due to reasons such as production technologies, in the process that battery pack is discharged and recharged, will inevitably enlarge this species diversity, and during charging, phenomenon can appear overcharging in the battery of the little poor performance of capacity; During discharge, the battery of the little poor performance of capacity had again puts phenomenon; The battery capacity utilance can be more and more lower, and if things go on like this, this vicious circle process will speed up the damage of battery.Therefore, need to adopt equalizing circuit be the common recognition of Chinese scholars and industry to extend the battery pack life-span to power battery pack.
Present equalizing circuit and method generally can be divided into and diminish equilibrium and non-dissipative equalizing; The below briefly introduces various balanced way: 1, shunt resistance equalization in parallel: but the resistance of a break-make in parallel on each cell, and it can play the effect of shunting.The voltage of each cell of system acquisition, if after finding wherein to have monomer battery voltage to surpass the certain threshold value of average voltage, this cell of conducting and the resistance that connects and shunt.Shortcoming is excessive energy loss, obviously is not suitable for high power capacity, high-tension application scenario.2, the electric capacity charge balancing method of shuttling back and forth: the electric capacity charge balancing method of shuttling back and forth adopts two kinds and realizes circuit: cascade electric capacity equalization and the flying capacitance equalization that shuttles back and forth that shuttles back and forth.The cascade electric capacity equalization that shuttles back and forth utilizes series capacitance to switch back and forth between battery pack to realize that electric voltage equalization discharges and recharges, and the bidirectional switch by single-pole double throw switches, and each electric capacity can be connected with two adjacent batteries.If the high electric weight battery of sort circuit and low electric weight battery are distributed in the different ends of battery pack, electric weight passes to the other end from an end and need to expend long time.The flying capacitance equalization that shuttles back and forth is that electric capacity can be charged to obtain electric weight by the monomer of high electric weight, then selects the monomer of low electric weight to charge to pass on electric weight.Sort circuit can greatly reduce balanced required time, and is especially more effective when high electric weight monomer and low electric weight monomer are in the different end of battery pack.The electric capacity charge balancing method of shuttling back and forth makes the balance frequency of circuit be restricted owing to introducing electric capacity, and the life and reliability of single-pole double-throw switch (SPDT) is fatal problem simultaneously, and this circuit needs the support of battery measurement supervisory control system simultaneously, system's more complicated that can become.3, power conversion charge balancing method: carrying out the monomer equilibrium with power conversion is to adopt inductance coil or transformer that energy is transferred to another joint or a Battery pack from a joint or a Battery pack.This circuit conditioning length consuming time, cost is higher.
In sum, all there is deficiency separately in existing various balancing techniques, and portfolio effect is relatively poor, are difficult to improve in the short period of time the consistency of battery pack, thereby are not suitable for the large-scale applications such as energy-accumulating power station that portfolio effect is had relatively high expectations.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of successful, has controlled easy circuit of battery pack balancing, in all allowing battery pack in the battery pack running, any one or a plurality of battery unit carry out equilibrium, euqalizing current is controlled simultaneously, control flexibly, effectively guarantee the consistency of battery pack; This circuit has satisfied the application demand of the large scale systems such as energy-accumulating power station.
For addressing the above problem, the technical solution of the utility model is:
A kind of adjustable current circuit of battery pack balancing, described battery pack is made of two above battery units, described battery unit is a cell or is comprised of two above cell serial or parallel connections, it is characterized in that, described equalizing circuit is comprised of balance controller and several adjustable balanced electronic circuits, each cell two ends adjustable balanced electronic circuit in parallel, described adjustable balanced electronic circuit is connected with balance controller respectively.
Preferably, described adjustable balanced electronic circuit comprises balanced power supply, two differential amplifiers, two comparators, sampling resistor, two load switches, three control switchs, a diode and two voltage-references, described balanced power supply VS, sampling resistor RS, load switch K2 connect with cell, wherein balanced power supply VS is anodal is connected with cell is anodal, and the first load switch K1 is in parallel with balanced power supply VS; Comparator U4 output is connected with load switch K2 control end, and comparator U4 positive input connects voltage-reference V2, and comparator U4 reverse input end connects differential amplifier U3 output; The positive input of differential amplifier U3 connects the end that sampling resistor is connected with the cell negative pole, and the reverse input end of differential amplifier U3 connects the end that sampling resistor and balanced power cathode connect; Comparator U1 output is connected with load switch K1 control end, and the first comparator positive input connects voltage-reference V1, and reverse input end connects the first differential amplifier output; The reverse input end of differential amplifier U2 connects the end that sampling resistor is connected with the cell negative pole, and the positive input of differential amplifier U2 connects the end that sampling resistor and balanced power cathode connect; Load switch K2 two ends connect a diode, and diode cathode is connected with the end of the second load switch near the cell negative pole, and anode is connected with the other end; Control switch Sn1 one termination voltage reference source V1, a termination voltage initial end, a termination voltage reference edge; Control switch Sn2 one termination voltage reference source V2, a termination voltage initial end, a termination voltage reference edge; Control switch Sn3 one termination is pressed reference edge, a termination 2A constant-current source, a termination 5A constant-current source; The control termination balance controller of control switch Sn1, Sn2, Sn3, n are the sequence number of cell in battery pack.
Preferably, described control switch is electronic switch or relay.
Preferably, described first, second load switch is the metal-oxide-semiconductor switch.
Adjustable current circuit of battery pack balancing provided by the utility model can be applied to the various battery pack such as lithium battery, this circuit can carry out charge balancing by battery unit too high to capacity or overtension, battery unit too high to capacity or overtension carries out equalization discharge, can regulate euqalizing current according to the attribute of battery unit, allow simultaneously any joint or multiple batteries unit are carried out equilibrium.The utility model can effectively suppress the super-charge super-discharge phenomenon of battery unit in series battery, make battery pack improve the consistency of battery pack within the shortest time, thereby extended the useful life of battery pack, had the characteristics such as portfolio effect is obvious, applied range.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model adjustable current circuit of battery pack balancing;
Fig. 2 is the circuit diagram of the adjustable balanced electronic circuit of the utility model single battery;
Fig. 3 is the circuit diagram of the utility model adjustable current circuit of battery pack balancing embodiment.
Embodiment
Further describe the utility model below in conjunction with drawings and Examples.
As Fig. 1 and 3, adjustable current circuit of battery pack balancing of the present utility model, described battery pack is made of several battery units, and battery unit is in parallel or be in series by one or more cells, and each battery unit attribute is consistent; Described battery base attribute comprises battery types, battery nominal capacity, battery nominal voltage; Described battery series-parallel connection structure comprises cell parallel quantity and battery series connection progression.In the present embodiment, battery pack is comprised of 3 battery units, and described battery unit is a joint cell, and a certain moment of the below in the batteries charging process describes the utility model in detail as benchmark.
Adjustable current circuit of battery pack balancing of the present utility model, described equalizing circuit is comprised of a balance controller U and 3 adjustable balanced electronic circuits; Described adjustable balanced electronic circuit is comprised of balanced power supply, two differential amplifiers, two comparators, sampling resistor, two load switches, three control switchs, a diode and two voltage-references; This adjustable equalizing circuit is connected in parallel on each battery unit two ends.
As Fig. 2, described adjustable balanced electronic circuit comprises balanced power supply, two differential amplifiers, two comparators, sampling resistor, two load switches, three control switchs, a diode and two voltage-references, described balanced power supply VS, sampling resistor RS, load switch K2 connect with cell, wherein balanced power supply VS is anodal is connected with cell is anodal, and the first load switch K1 is in parallel with balanced power supply VS; Comparator U4 output is connected with load switch K2 control end, and comparator U4 positive input connects voltage-reference V2, and comparator U4 reverse input end connects differential amplifier U3 output; The positive input of differential amplifier U3 connects the end that sampling resistor is connected with the cell negative pole, and the reverse input end of differential amplifier U3 connects the end that sampling resistor and balanced power cathode connect; Comparator U1 output is connected with load switch K1 control end, and the first comparator positive input connects voltage-reference V1, and reverse input end connects the first differential amplifier output; The reverse input end of differential amplifier U2 connects the end that sampling resistor is connected with the cell negative pole, and the positive input of differential amplifier U2 connects the end that sampling resistor and balanced power cathode connect; Load switch K2 two ends connect a diode, and diode cathode is connected with the end of the second load switch near the cell negative pole, and anode is connected with the other end; Control switch Sn1 one termination voltage reference source V1, a termination voltage initial end, a termination voltage reference edge; Control switch Sn2 one termination voltage reference source V2, a termination voltage initial end, a termination voltage reference edge; Control switch Sn3 one termination is pressed reference edge, a termination 2A constant-current source, a termination 5A constant-current source; The control termination balance controller of control switch Sn1, Sn2, Sn3; N is the sequence number of cell in battery pack.Control switch Sn1, Sn2, Sn3 are relay, and the first load switch K1 and the second load switch K2 are the metal-oxide-semiconductor switch.
Adjustable current circuit of battery pack balancing of the present utility model is through balance controller U, each cell balancing state to be judged, and control each battery unit according to the equilibrium state that obtains and carry out charge balancing or equalization discharge, do not contain collection and the demonstration of real time data in the course of work, the course of work of this circuit is as described below:
Suppose that a certain moment balance controller U carries out the charge balancing that BAT1 is carried out 2A, BAT3 is carried out the equalization discharge of 5A, the implementation status of adjustable current circuit of battery pack balancing of the present utility model is as follows:
1, the adjustable balanced electronic circuit operation of BAT1 is as follows: balance controller U controls S12 and switches, and S11, S13 do not switch; Euqalizing current is 2A, Vref=V_2A; V12=Vref is output as high level by U14, drives the K12 conducting; V11=V0, K11 disconnects.The charge balancing current direction is: balanced power supply VS1 positive pole → BAT1 positive pole → BAT1 negative pole → K12 → sampling resistor RS1 → balanced power supply VS1 negative pole; Sampling resistor RS1 is voltage with current transitions, and amplifies by differential amplifier U13, and the voltage after amplification is received comparator U14 negative terminal, and when the voltage after amplifying was consistent with V12, the loop reached dynamic equilibrium;
2, the adjustable balanced electronic circuit operation of BAT2 is as follows: balance controller U controls S21, S22, S23 does not switch; V21=V22=V0, K21, K22 disconnect, and charging and discharging circuit is all obstructed;
3, the adjustable balanced electronic circuit operation of BAT3 is as follows: balance controller U controls S31 and switches, and S32, S33 do not switch; Euqalizing current is 2A, Vref=V_2A; V31=Vref is output as high level by U31, drives the K31 conducting; V32=V0, K32 disconnects.The equalization discharge current direction is: BAT3 positive pole → K31 → sampling resistor RS3 → diode D3 → BAT3 negative pole.Sampling resistor RS3 is voltage with current transitions, and amplifies by differential amplifier U32, and the voltage after amplification is received comparator U32 negative terminal, and when the voltage after amplifying was consistent with V31, the loop reached dynamic equilibrium.
In sum, this patent has adopted a kind of brand-new balanced way.Can carry out charge balancing or equalization discharge to any one or a plurality of battery unit by adjustable euqalizing current, improve fast and effectively the consistency of battery pack.The utility model is applicable to various series batteries, as is applied to the large-scale fields such as energy-accumulating power station, electric automobile.
Claims (4)
1. adjustable current circuit of battery pack balancing, described battery pack is comprised of two above battery units, described battery unit is a cell or is comprised of two above cell serial or parallel connections, it is characterized in that, described equalizing circuit is comprised of balance controller and several adjustable balanced electronic circuits, each cell two ends adjustable balanced electronic circuit in parallel, described adjustable balanced electronic circuit is connected with balance controller respectively.
2. adjustable current circuit of battery pack balancing according to claim 1, it is characterized in that, described adjustable balanced electronic circuit comprises balanced power supply, two differential amplifiers, two comparators, sampling resistor, two load switches, three control switchs, a diode and two voltage-references;
Described balanced power supply VS, sampling resistor RS, load switch K2 connect with cell, and wherein balanced power supply VS is anodal is connected with cell is anodal, and the first load switch K1 is in parallel with balanced power supply VS;
Comparator U4 output is connected with load switch K2 control end, and comparator U4 positive input connects voltage-reference V2, and comparator U4 reverse input end connects differential amplifier U3 output;
The positive input of differential amplifier U3 connects the end that sampling resistor is connected with the cell negative pole, and the reverse input end of differential amplifier U3 connects the end that sampling resistor and balanced power cathode connect;
Comparator U1 output is connected with load switch K1 control end, and the first comparator positive input connects voltage-reference V1, and reverse input end connects the first differential amplifier output;
The reverse input end of differential amplifier U2 connects the end that sampling resistor is connected with the cell negative pole, and the positive input of differential amplifier U2 connects the end that sampling resistor and balanced power cathode connect;
Load switch K2 two ends connect a diode, and diode cathode is connected with the end of the second load switch near the cell negative pole, and anode is connected with the other end;
Control switch Sn1 one termination voltage reference source V1, a termination voltage initial end, a termination voltage reference edge;
Control switch Sn2 one termination voltage reference source V2, a termination voltage initial end, a termination voltage reference edge;
Control switch Sn3 one termination is pressed reference edge, a termination 2A constant-current source, a termination 5A constant-current source;
The control termination balance controller of control switch Sn1, Sn2, Sn3;
N is the sequence number of cell in battery pack.
3. adjustable current circuit of battery pack balancing according to claim 2, is characterized in that, described control switch is electronic switch or relay.
4. adjustable current circuit of battery pack balancing according to claim 3, is characterized in that, described load switch is the metal-oxide-semiconductor switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220558655 CN202940606U (en) | 2012-10-29 | 2012-10-29 | Adjustable-current battery pack equalization circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220558655 CN202940606U (en) | 2012-10-29 | 2012-10-29 | Adjustable-current battery pack equalization circuit |
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| Publication Number | Publication Date |
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| CN202940606U true CN202940606U (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220558655 Expired - Lifetime CN202940606U (en) | 2012-10-29 | 2012-10-29 | Adjustable-current battery pack equalization circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111527664A (en) * | 2018-03-01 | 2020-08-11 | 株式会社村田制作所 | Battery pack |
| CN115360800A (en) * | 2022-10-20 | 2022-11-18 | 青岛鼎信通讯股份有限公司 | Battery equalization circuit suitable for electric power product |
-
2012
- 2012-10-29 CN CN 201220558655 patent/CN202940606U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111527664A (en) * | 2018-03-01 | 2020-08-11 | 株式会社村田制作所 | Battery pack |
| CN111527664B (en) * | 2018-03-01 | 2023-06-30 | 株式会社村田制作所 | Battery pack |
| CN115360800A (en) * | 2022-10-20 | 2022-11-18 | 青岛鼎信通讯股份有限公司 | Battery equalization circuit suitable for electric power product |
| CN115360800B (en) * | 2022-10-20 | 2023-01-31 | 青岛鼎信通讯股份有限公司 | Battery equalization circuit suitable for electric power product |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Tianhe District Longkou East Road Guangzhou city Guangdong province 510630 No. 32 Patentee after: China Southern Power Grid Tiaofeng Frequency Modulation Power Generation Company Patentee after: HANGZHOU GOLD ELECTRONIC EQUIPMENT Inc.,Ltd. Address before: Tianhe District Longkou East Road Guangzhou city Guangdong province 510630 No. 32 Patentee before: China Southern Power Grid Tiaofeng Frequency Modulation Power Generation Company Patentee before: HANGZHOU GOLD ELECTRONIC EQUIPMENT Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181227 Address after: 510630 room 2201, Longkou East Road, Tianhe District, Guangzhou, Guangdong, 2201 Co-patentee after: HANGZHOU GOLD ELECTRONIC EQUIPMENT Inc.,Ltd. Patentee after: SOUTHERN POWER GRID PEAK LOAD AND FREQUENCY REGULATION POWER GENERATION Co.,Ltd. Address before: 510630 32, Longkou East Road, Tianhe District, Guangzhou, Guangdong. Co-patentee before: HANGZHOU GOLD ELECTRONIC EQUIPMENT Inc.,Ltd. Patentee before: China Southern Power Grid Tiaofeng Frequency Modulation Power Generation Company |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130515 |