CN213484531U - Active voltage balancing circuit for battery formation and grading and electronic equipment - Google Patents

Active voltage balancing circuit for battery formation and grading and electronic equipment Download PDF

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Publication number
CN213484531U
CN213484531U CN202021273948.1U CN202021273948U CN213484531U CN 213484531 U CN213484531 U CN 213484531U CN 202021273948 U CN202021273948 U CN 202021273948U CN 213484531 U CN213484531 U CN 213484531U
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switch
battery
circuit
voltage
capacitor
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刘中伟
石伟
周敦平
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Xi'an Topology Electric Power Technology Co ltd
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Xi'an Topology Electric Power Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

The utility model relates to the technical field of power electronics, and discloses an active voltage balancing circuit with battery formation and capacity grading and an electronic device, wherein the circuit comprises N minimum circuit units; each minimum circuit unit comprises a battery, a first switch, a second switch, a third switch, a fourth switch and a first capacitor, wherein the first end of the first switch is connected with the anode of the battery, the first end of the second switch is connected with the cathode of the battery, the first end of the third switch is connected with the second end of the first switch, the first end of the fourth switch is connected with the second end of the second switch, the first end of the first capacitor is connected with the second end of the first switch, and the second end of the first capacitor is connected with the second end of the second switch; and the second ends of the third switches of the N minimum circuit units are connected, and the second ends of the fourth switches of the N minimum circuit units are connected. The circuit can realize real-time equalization, has high equalization efficiency, and has the advantages of simple equalization circuit, low cost, simple equalization control and the like.

Description

Active voltage balancing circuit for battery formation and grading and electronic equipment
Technical Field
The utility model relates to a power electronic technology field, in particular to initiative equalizing voltage circuit and electronic equipment of battery ization composition partial volume.
Background
The process of battery formation and capacity grading requires the operation of charging and discharging a new battery. Energy-feeding type chemical composition and capacity-sharing equipment in the market and each battery need to be provided with an independent high-precision constant-voltage constant-current converter and a power cable, and meanwhile, wiring installation is complex. Further, there is a limit in the space for reducing the cost of the apparatus, improving the production efficiency, and improving the efficiency of the converter.
In order to save the cost of chemical conversion and capacity separation equipment, the energy feedback type serial chemical conversion becomes a trend. The batteries are connected in series in the same power loop in a series connection mode, so that the consistency of charging and discharging currents of the batteries in the same batch can be ensured; the system only uses one input and one output, and the batteries are interconnected by short and thick short connecting wires, so that the total power cable length of the system is greatly reduced, the cable cost is greatly reduced, the extra loss caused by the cable is reduced, the system efficiency is improved, the cable is simplified, the installation workload of the system is greatly reduced, and the labor cost is reduced; the number of the constant current sources is reduced by the serial component capacitance, for example, N batteries are connected in series, so that N-1 constant current power source modules can be reduced, and N is an integer greater than 1.
When the batteries enter a constant voltage stage, each battery needs to be bypassed from the system and is taken over by a respective constant voltage module to continue the formation of the constant voltage charging battery.
In the prior art, the constant voltage module may be constructed as shown in fig. 1, with each cell (B)1、B2……BN) Are connected with independent controlled constant voltage modules, the constant voltage modules comprise a switch and a resistor, the constant voltage modules are passive voltage-sharing modules at the moment, and the control module controls the switch (K)1、K2… … or KN) Conducting to make the resistance load (R) corresponding to the switch1、R2… … or RN) Battery monomer with high energy consumptionThe voltage-sharing effect is realized, but the constant-voltage module is low in efficiency and cannot share voltage in real time.
SUMMERY OF THE UTILITY MODEL
The utility model provides an initiative equalizing voltage circuit and electronic equipment of battery ization composition appearance, the initiative equalizing voltage circuit of above-mentioned battery ization composition appearance can realize real-time equilibrium, balanced efficient, and has advantages such as equalizing circuit is simple, with low costs, balanced control is simple.
In order to achieve the above purpose, the utility model provides the following technical scheme:
a battery formation capacity-grading active voltage equalization circuit comprises N minimum circuit units;
each minimum circuit unit comprises a battery, a first switch, a second switch, a third switch, a fourth switch and a first capacitor, wherein a first end of the first switch is connected with the positive electrode of the battery, a first end of the second switch is connected with the negative electrode of the battery, a first end of the third switch is connected with a second end of the first switch, a first end of the fourth switch is connected with a second end of the second switch, a first end of the first capacitor is connected with a second end of the first switch, and a second end of the first capacitor is connected with a second end of the second switch; wherein the content of the first and second substances,
second ends of the third switches of the N minimum circuit units are connected, and second ends of the fourth switches of the N minimum circuit units are connected.
In a possible embodiment, the first switch, the second switch, the third switch and the fourth switch are all bidirectional switches.
In one possible embodiment, the bidirectional switch is a relay, a metal-oxide semiconductor field effect transistor, or an insulated gate bipolar transistor.
In a possible implementation manner, the minimum circuit unit further comprises a regulator, wherein a first end of the regulator is connected with second ends of the third switches of the N minimum circuit units, and a second end of the regulator is connected with second ends of the fourth switches of the N minimum circuit units.
In one possible embodiment, in each minimum circuit unit, a current limiting unit or a protection device is provided between the battery and the first switch and/or the second switch.
In a possible embodiment, the first switch is linked to the second switch, and the third switch is linked to the fourth switch.
In one possible embodiment, the first switch and the third switch have different on-off states, and the second switch and the fourth switch have different on-off states.
The utility model also provides an electronic equipment, the initiative equalizing voltage circuit of arbitrary one kind battery ization composition partial volume that provides in the above-mentioned technical scheme.
In the active equalizing voltage circuit and the electronic device with battery formation and capacity provided by the embodiments of the present invention, each minimum circuit unit includes a battery, a first switch, a second switch, a third switch, a fourth switch and a first capacitor, during the operation of the active equalizing voltage circuit with battery formation and capacity formation, the first switch and the second switch of each minimum circuit unit can be first closed, the third switch and the fourth switch are opened, the voltage in each minimum circuit unit is equal to the voltage of the battery, the first switch and the second switch of each minimum circuit unit are then opened, the third switch and the fourth switch are closed, the N first capacitors are connected in parallel, the capacitors with high voltage in the N first capacitors are charged to the capacitors with low voltage, the voltage of the N first capacitors is equal, finally, the first switch and the second switch of each minimum circuit unit are closed, in each minimum circuit unit, if the voltage of the first capacitor is greater than the voltage of the battery, the first capacitor charges the battery, and if the voltage of the first capacitor is less than the voltage of the battery, the first capacitor absorbs the energy of the battery, so that the voltage balance of the N batteries can be realized through the intermediate balance of the N first capacitors. In the active equalization voltage circuit for the formation and the partial capacity of the battery, an active equalization voltage circuit with a capacitor capable of damaging the formation and the partial capacity of the active battery is provided, the charge and discharge energy transfer of the high-energy battery is realized by combining the first capacitor with the switch, and the energy transfer from the high-energy battery to the low-energy battery monomer (the energy for charging the high-energy battery is reduced) can be realized when the battery is charged; during discharging, the high-energy battery emits more electric energy than the low-energy battery, real-time equalization can be realized, the equalization efficiency is high, and the method has the advantages of simple equalization circuit, low cost, simple equalization control and the like.
Drawings
FIG. 1 is a schematic diagram of a constant voltage module according to the prior art;
fig. 2 is a schematic structural diagram of an active voltage balancing circuit for battery formation capacity according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another active voltage equalization circuit for battery formation capacity according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 2, the present invention provides an active voltage balancing circuit for battery formation, which includes N minimum circuit units 01, where N is a positive integer greater than 1;
each minimum circuit unit 01 comprises a battery BAT, a first switch S1, a second switch S2, a third switch S3, a fourth switch S4 and a first capacitor C1, wherein a first end of the first switch S1 is connected with a positive electrode of the battery BAT, a first end of the second switch S2 is connected with a negative electrode of the battery BAT, a first end of the third switch S3 is connected with a second end of the first switch S1, a first end of the fourth switch S4 is connected with a second end of the second switch S2, a first end of the first capacitor C1 is connected with a second end of the first switch S1, and a second end of the first capacitor C1 is connected with a second end of the second switch S2; wherein the content of the first and second substances,
second terminals of the third switches S3 of the N minimum circuit units 01 are connected, and second terminals of the fourth switches S4 of the N minimum circuit units 01 are connected.
In the active equalization voltage circuit of battery-based component capacity provided by the embodiment of the present invention, including N minimum circuit units 01, each minimum circuit unit 01 includes a battery BAT, a first switch S1, a second switch S2, a third switch S3, a fourth switch S4 and a first capacitor C1, during the operation of the active equalization voltage circuit of battery-based component capacity, the first switch S1 and the second switch S2 of each minimum circuit unit can be first closed, the third switch S3 and the fourth switch S4 are opened, the voltage of C1 in each minimum circuit unit 01 is equal to the voltage of battery BAT, then the first switch S1 and the second switch S2 of each minimum circuit unit are opened, the third switch S3 and the fourth switch S4 are closed, N first capacitors C1 are connected in parallel, the high-voltage capacitor in N first capacitors C1 charges the low-voltage capacitor, so that the voltage of N first capacitors C1 is equal, and finally, the first switch S1 and the second switch S1 of each minimum circuit unit are closed, the third switch S3 and the fourth switch S4 are opened, in each minimum circuit unit, if the voltage of the first capacitor C1 is larger than the voltage of the battery BAT, the first capacitor C1 charges the battery BAT, and if the voltage of the first capacitor C1 is smaller than the voltage of the battery BAT, the first capacitor C1 absorbs the energy of the battery BAT, so that the voltage balance of the medium of the N batteries BAT can be realized through the balance of the N first capacitors C1. In the active equalization voltage circuit for the battery formation partial capacity, an active equalization voltage circuit with a capacitor capable of not damaging the active battery formation partial capacity is provided, the charge and discharge energy transfer of the high-energy battery is realized by combining the first capacitor with the switches S1-S4, and the energy transfer from the high-energy battery to the low-energy battery monomer (the energy for charging the high-energy battery is reduced) can be realized when the battery is charged; during discharging, the high-energy battery emits more electric energy than the low-energy battery, real-time equalization can be realized, the equalization efficiency is high, and the equalization circuit has the advantages of simplicity, low cost, simplicity in equalization control and the like.
Specifically, the first switch and the second switch may be linked, and the third switch and the fourth switch may be linked, that is, the first switch S1 and the second switch S2 are turned on at the same time, and the third switch S3 and the fourth switch S4 are turned on at the same time.
Specifically, the first switch and the third switch have different on-off states, and the second switch and the fourth switch have different on-off states, that is, the first switch S1 and the third switch S3 are not turned on at the same time, and the second switch S2 and the fourth switch S4 are not turned on at the same time.
In a specific embodiment, the first switch S1, the second switch S2, the third switch S3, and the fourth switch S4 are all bidirectional switches, for example, the bidirectional switches may be switches composed of a relay, a metal-oxide semiconductor field effect transistor (MOSFET), an Insulated Gate Bipolar Transistor (IGBT), or the like.
In another specific embodiment, as shown in fig. 3, a regulator V is further included, a first terminal of the regulator V is connected to the second terminals of the third switches of the N minimum circuit units, and a second terminal of the regulator V is connected to the second terminals of the fourth switches of the N minimum circuit units. When the switches S1 and S2 are opened and the switches S3 and S4 are closed, the voltages of the N first capacitors C1 are equal, and the voltage stabilizing source V can adjust the voltages of the N first capacitors C1 and keep the voltages of the N first capacitors C1 stable, so that the voltage balancing effect of the circuit is better.
In one possible embodiment, in each minimum circuit unit 01, a current limiting unit or a protection device is provided between the battery BAT and the first switch S1 and/or the second switch S2, for example, a fuse may be connected between the battery BAT and the first switch S1 and/or the second switch S2 to protect the circuit.
The embodiment of the utility model provides an electronic equipment is still provided, the initiative equalizing voltage circuit of arbitrary one kind battery ization composition partial volume that provides in the above-mentioned technical scheme.
It will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (8)

1. The active voltage equalization circuit for battery formation capacity is characterized by comprising N minimum circuit units;
each minimum circuit unit comprises a battery, a first switch, a second switch, a third switch, a fourth switch and a first capacitor, wherein a first end of the first switch is connected with the positive electrode of the battery, a first end of the second switch is connected with the negative electrode of the battery, a first end of the third switch is connected with a second end of the first switch, a first end of the fourth switch is connected with a second end of the second switch, a first end of the first capacitor is connected with a second end of the first switch, and a second end of the first capacitor is connected with a second end of the second switch; wherein the content of the first and second substances,
second ends of the third switches of the N minimum circuit units are connected, and second ends of the fourth switches of the N minimum circuit units are connected.
2. The active voltage equalization circuit of claim 1 wherein the first switch, the second switch, the third switch, and the fourth switch are all bi-directional switches.
3. The battery-based, capacity-sharing active voltage equalization circuit of claim 2, wherein said bidirectional switch is a relay, a metal-oxide semiconductor field effect transistor, or an insulated gate bipolar transistor.
4. The active voltage equalization circuit of any of claims 1-3 further comprising a voltage regulator, a first terminal of the voltage regulator being connected to the second terminals of the third switches of the N minimum circuit units, and a second terminal of the voltage regulator being connected to the second terminals of the fourth switches of the N minimum circuit units.
5. The active voltage equalization circuit of claim 1 wherein each of the minimum circuit units has a current limiting unit or a protection device between the battery and the first switch and/or the second switch.
6. The active voltage equalization circuit of claim 1 wherein the first switch is ganged with the second switch and the third switch is ganged with the fourth switch.
7. The battery-based, capacity-sharing active voltage equalization circuit of claim 1, wherein the first switch and the third switch are in different on-off states, and the second switch and the fourth switch are in different on-off states.
8. An electronic device comprising a battery-based capacity-sharing active equalization voltage circuit as claimed in any of claims 1-7.
CN202021273948.1U 2020-07-01 2020-07-01 Active voltage balancing circuit for battery formation and grading and electronic equipment Active CN213484531U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021273948.1U CN213484531U (en) 2020-07-01 2020-07-01 Active voltage balancing circuit for battery formation and grading and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021273948.1U CN213484531U (en) 2020-07-01 2020-07-01 Active voltage balancing circuit for battery formation and grading and electronic equipment

Publications (1)

Publication Number Publication Date
CN213484531U true CN213484531U (en) 2021-06-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021273948.1U Active CN213484531U (en) 2020-07-01 2020-07-01 Active voltage balancing circuit for battery formation and grading and electronic equipment

Country Status (1)

Country Link
CN (1) CN213484531U (en)

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