CN108471149A - A kind of lithium-ion-power cell group active equalization circuit - Google Patents
A kind of lithium-ion-power cell group active equalization circuit Download PDFInfo
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- CN108471149A CN108471149A CN201810235332.6A CN201810235332A CN108471149A CN 108471149 A CN108471149 A CN 108471149A CN 201810235332 A CN201810235332 A CN 201810235332A CN 108471149 A CN108471149 A CN 108471149A
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- battery
- lithium
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- voltage
- cell group
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
Abstract
The present invention relates to a kind of lithium-ion-power cell group active equalization circuits, it is carried out using relay and auxiliary monomer battery balanced between single battery in power battery pack, the active equalization circuit includes boosting battery monomer, lithium-ion-power cell group, voltage acquisition module, the gating circuit being made of relay, commutating circuit and current sensor, active equalization circuit passes through to cell voltage, the judgement of state-of-charge and capacity, need balanced battery cell in parallel with auxiliary monomer progress using gating circuit and commutating circuit selection, realize the energy transfer needed between balanced battery cell and auxiliary monomer, and realize storage and output of the energy on auxiliary monomer, to realize equilibrium.The active equalization circuit of the present invention is simple in structure, and balancing procedure rapidly and efficiently, securely and reliably, can effectively manage battery set charge/discharge state, improve battery pack service life.
Description
Technical field
The present invention relates to technical field of battery management, more particularly, to a kind of lithium-ion-power cell group active equalization electricity
Road.
Background technology
In recent years, because lithium ion battery has, small, energy density is high, memory-less effect, cycle life are high, self discharge
The low advantage of rate, lithium battery largely use on electric vehicle.But the bottleneck that electric vehicle is popularized on a large scale is hindered at present still
It is the continuation of the journey problem of battery, it is seen then that the efficient utilization and the raising in service life of lithium ion battery continue to develop to electric vehicle
It is most important.
Influence the consistency that a Li-ion batteries piles service life important factor is exactly single battery.Due to the work between monomer
Make environment temperature, battery capacity, internal resistance, SOC and the otherness of self discharge, cause single battery in groups after, with charge and discharge
Cycle-index increases, and the difference between single battery is gradually broken up, and then battery performance is caused to deteriorate.
In order to solve the consistency problem of single battery, power electronic technique is usually utilized, in lithium-ion-power cell group
Interior design equalizing circuit.Equalizing circuit is generally divided into two kinds, and one is the systems of non-artificial intervention from balanced passive equilibrium,
Another kind is the active equalization for the purpose of the target taking human as setting artificially interfered, and specifically includes the equilibrium of energy dissipation formula and energy
It is balanced to measure transfer type, the major function of active equalization circuit is no matter lithium-ion-power cell group is in charging, electric discharge or placement
In the process, all using internal battery pack between battery cell otherness carry out active equalization, with eliminate battery at
Various inconsistencies after group due to being generated during itself and use.But since the energy transfer in balancing procedure can be because
Weigh power supply itself the effect of characteristic and generate the variation of polarization resistance in the electrochemical properties of thermal losses and battery, can not
It is really solved the problems, such as with simple balancing energy mode.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of lithium ion power electricity
Pond group active equalization circuit.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of lithium-ion-power cell group active equalization circuit, the active equalization circuit include voltage acquisition module, lithium from
The input terminal of sub- power battery pack, auxiliary monomer battery, gating circuit and commutating circuit, the voltage acquisition module connects lithium
Each single battery in ion battery group and auxiliary monomer battery, output end and the battery management system of voltage acquisition module
The control unit of system connects, and the lithium-ion-power cell group, gating circuit, commutating circuit and auxiliary monomer battery connect successively
It connects, the commutating circuit is dpdt relay；
When a certain single battery is with auxiliary monomer cell parallel in gating circuit selection lithium-ion-power cell group, it is closed double
Two switches of dpdt double-pole double-throw (DPDT) relay determine commutation according to the single battery the location of in lithium-ion-power cell group
The conducting direction of circuit makes itself and auxiliary monomer cell parallel, completes to need between balanced single battery and auxiliary monomer battery
Energy transfer.
Preferably, the gating circuit includes a plurality of odd number branch and even number branch, odd number branch circuit parallel connection shape together
At a public output, even number branch circuit parallel connection forms a public output, even number branch one end and odd number branch together
One end is alternately connected to each single battery both ends in lithium-ion-power cell group, and the even number branch other end connects even number branch circuit parallel connection
The public output of formation, the odd number branch other end connect the public output that odd number branch circuit parallel connection is formed, and every branch road is gone here and there
Join a relay.
Preferably, two input terminals of the dpdt relay respectively with two public outputs of gating circuit
Connection, two output ends of dpdt relay are connected with the positive and negative electrode of auxiliary monomer battery respectively.
Preferably for the lithium-ion-power cell group being made of N number of concatenated single battery, adopted using N+1 voltage
Collect module and carry out voltage measurement, wherein N number of voltage acquisition module is used to carry out voltage measurement, 1 voltage acquisition to single battery
Module is used to carry out voltage measurement to auxiliary monomer battery.
Preferably, the capacity of the auxiliary monomer battery is the capacity of the single battery in lithium-ion-power cell group
25%~150%.
Preferably, the relay is in single-pole single-throw(SPST relay, single-pole double-throw relay, dpdt relay
One kind, or the combination for above-mentioned multiple types relay.
Preferably, the active equalization circuit is additionally provided with the current sensor for measuring auxiliary monomer battery current,
One output end of commutating circuit connects the anode of auxiliary monomer battery after connecting with current sensor.
Preferably, the balancing procedure of the active equalization circuit is：
S1, voltage acquisition module acquire the voltage and auxiliary monomer electricity of each single battery in lithium-ion-power cell group
The auxiliary battery voltage in pond, if entering step S2 in whole discharge condition in lithium-ion-power cell group, if lithium ion is dynamic
Power battery pack is in whole charged state, then enters step S3, if lithium-ion-power cell group generally in static condition, into
Enter step S4；
If the auxiliary battery voltage of S2, voltage acquisition module acquisition is higher than minimum single battery in lithium-ion-power cell group
Voltage, then the single battery for selecting the voltage minimum, the minimum single battery of control unit conducting voltage of battery management system
Gating circuit between auxiliary monomer battery and commutating circuit, using auxiliary monomer battery to minimum in lithium-ion-power cell group
Single battery charge；If the auxiliary battery voltage of voltage acquisition module acquisition is minimum less than in lithium-ion-power cell group
The voltage of single battery wouldn't then carry out equalization operation, lithium-ion-power cell group is made to continue to discharge, and repeat step S2 until lithium
Voltage difference in ion battery group between each single battery is less than setting value；
If the voltage of highest single battery is single higher than auxiliary in the lithium-ion-power cell group of S3, voltage acquisition module acquisition
The voltage of body battery then selects the highest single battery of the voltage, the control unit conducting voltage highest list of battery management system
Gating circuit between body battery and auxiliary monomer battery and commutating circuit, the highest single battery of voltage to auxiliary monomer battery into
Row charging；If the voltage of highest single battery is less than auxiliary monomer electricity in the lithium-ion-power cell group of voltage acquisition module acquisition
The voltage in pond wouldn't then carry out equalization operation, lithium-ion-power cell group is made to continue to charge, and repeat step S3 until lithium ion is dynamic
Voltage difference in power battery pack between each single battery is less than setting value；
S4, selection voltage are less than the single battery of auxiliary battery voltage, and the control unit conducting of battery management system is chosen
Gating circuit between single battery and auxiliary monomer battery and commutating circuit, using auxiliary monomer battery to choose single battery into
Row charging；Voltage is selected to be higher than the single battery of auxiliary battery voltage, monomer is chosen in the control unit conducting of battery management system
Gating circuit between battery and auxiliary monomer battery and commutating circuit carry out auxiliary monomer battery using the single battery chosen
Charging, auxiliary monomer battery charges to the single battery chosen, the single battery chosen fills auxiliary monomer battery
Two processes of electricity alternately, until the voltage difference in lithium-ion-power cell group between each single battery is less than setting value.
Compared with prior art, the present invention has the following advantages：
(1) charging/discharging active equalization circuit for lithium ion power battery pack of the invention changes existing balanced configuration
Into, it uses relay and constitutes gating circuit, it, can be excessively high to avoid occurring in circuit because relay itself has buffer action
Common-mode voltage and the phenomenon that so that gating circuit is failed；
(2) present invention constitutes commutating circuit using a dpdt relay so that circuit is simpler, and simplifies
The program of commutating circuit controls；
(3) charge and discharge are carried out with the single battery in lithium-ion-power cell group present invention employs auxiliary monomer battery to match
It closes, in conjunction with rational balanced flow, can balanced management effectively be carried out to battery status, and can effectively promote the appearance of battery pack
Amount, extends the service life of battery pack；
(4) simple structure of lithium-ion-power cell group active equalization circuit of the present invention, securely and reliably.
Description of the drawings
The principle schematic of Fig. 1 active equalization circuits between the single battery based on auxiliary monomer battery；
Fig. 2 is a kind of electrical block diagram of lithium-ion-power cell group active equalization circuit；
Fig. 3 is equivalent circuit diagram when boosting battery charges to single battery (odd number road) in equalizing circuit of the present invention；
Fig. 4 is equivalent circuit diagram when boosting battery charges to single battery (even number road) in equalizing circuit of the present invention；
In Fig. 2, Fig. 3, Fig. 4 shown in label：
1, voltage acquisition module, 2, lithium-ion-power cell group, 3, gating circuit, 4, relay, 5, commutating circuit, 6, auxiliary
Help single battery, 7, current sensor, 201, choose single battery, 401, relay, 402, relay, 501, double-pole double throw after
Electric appliance, a, the first input contact, b, the second input contact, c, third input contact, d, the 4th input contact.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
The basic principle of the present invention as shown in Figure 1, lithium-ion-power cell group is made of multiple single batteries, i.e. B1, B2,
B3、B4、B5、B6、..., single battery is by left and right sides switch S accordingly1、S2、S3、S4、S5、S6、S7、...Control.Work as selection
When n-th single battery carries out balanced management, closure switch SNAnd SN+1, switching is with double-point double-throw switch (DPDT, Double
Pole Double Throw) relay corresponding contacts, determine the conducting direction of commutating circuit, make auxiliary monomer battery B0
It is in parallel with the single battery chosen.
As shown in Fig. 2, the present invention provides a kind of lithium-ion-power cell group active equalization circuit, which includes
Voltage acquisition module 1, lithium-ion-power cell group 2, gating circuit 3, commutating circuit 5, auxiliary monomer battery 6 and current sensor
7。
Voltage acquisition module 1 connects each single battery and auxiliary monomer battery 6 in lithium-ion-power cell group 2, real
When acquisition lithium-ion-power cell group 2 in each single battery voltage, while the also boosting battery of acquisition auxiliary monomer battery 6
Voltage；Current sensor 7 acquires the current signal of auxiliary monomer battery 6, and collected voltage signal and current signal are sent
To the control unit of battery management system, and current sensor 7 can monitor the maximum current in equalizing circuit simultaneously.
Gating circuit 3 is made of N+1 branch, wherein odd number branch circuit parallel connection is respectively formed a public output together
End, even number branch circuit parallel connection are respectively formed a public output together.One relay 4 of every branch road series connection.Lithium ion
The anode of each single battery and cathode are in series with a branch of gating circuit 3 in power battery pack 2, and N is single battery
Number.
Commutating circuit 5 is made of a dpdt relay 501, two public outputs difference of gating circuit 3
It is connected with two input contacts of dpdt relay 501, an output contact and auxiliary for dpdt relay 501 is single
The cathode of body battery 6 is connected, another output contact be connected with current sensor 7 after again with the positive phase of auxiliary monomer battery 6
Even.
Gating circuit 3 passes through main controller controls with commutating circuit 5.Gating circuit 3 is used to select to need to carry out balanced
Single battery, 5 switching electric current conducting direction of commutating circuit, makes the single battery chosen be in parallel with auxiliary monomer battery 6, with this
Realize the balanced management of the single battery.
Relay 4 in the present invention in gating circuit 3 can use single-pole single-throw(SPST relay, single-pole double-throw relay, double
A plurality of types of relays such as dpdt double-pole double-throw (DPDT) relay or a plurality of types of combinations.
The conducting of all relays in circuit of the present invention is with cut-off (or switching of relay contact) by cell tube
The control unit of reason system makes control according to coherent signal and algorithm.In no control signal, the contact of relay is in
Normally open position or centre position, equalizing circuit are in breaking off position.
The capacity of auxiliary monomer battery 6 in circuit of the present invention is the appearance of the single battery in lithium-ion-power cell group 2
The 25%~150% of amount.When selection capacity is less than other batteries of the single battery in lithium-ion-power cell group 2, it can save
Cost.The control unit of battery management system passes through to single battery and auxiliary monomer all in lithium-ion-power cell group 2
The voltage of battery 6, the multilevel iudge of state-of-charge and capacity, equalization methods are：It is filled in the dynamic of lithium-ion-power cell group 2
In discharge process, when lithium-ion-power cell group 2 be in integrally discharge process when, select the lower single battery of voltage with it is auxiliary
It helps single battery 6 in parallel, when lithium-ion-power cell group 2 is in the process integrally to charge, selects the higher monomer electricity of voltage
Pond is in parallel with auxiliary monomer battery 6；Under the static conditions of lithium-ion-power cell group 2, auxiliary monomer battery 6 can pass through choosing
Circuit passband 3 is in parallel with the single battery lower than its auxiliary battery voltage, charges to single battery, auxiliary monomer electricity
Pond 6 can also be in parallel by gating circuit 3 with the single battery higher than its auxiliary battery voltage, and single battery is to auxiliary
Single battery 6 charges, and repeatedly, realizes the energy transfer needed between balanced single battery and auxiliary monomer battery 6,
And realize storage and output of the energy on auxiliary monomer battery 6, make lithium-ion-power cell group 2 that there is better consistency.
As shown in Fig. 2, the present embodiment is by taking the lithium-ion-power cell group 2 that four pieces of single batteries are constituted as an example, and certainly, this reality
Apply the number that example does not limit single battery, in other embodiment, can connect five pieces of even more single batteries.In addition,
Single battery in auxiliary monomer battery 6 and lithium-ion-power cell group 2 is same model, but capacity can also be selected equal or
Smaller battery.The balance charge/discharge process of the present embodiment is as follows：
During setting lithium-ion-power cell group 2 is in whole electric discharge, n-th chooses single battery 201 (it is assumed that N
For odd number) it is a certain lower single battery of moment voltage, it is needed to carry out balanced management, battery by battery management system selection
Management system charges to the single battery by boosting battery 6 is controlled, as shown in figure 3, choosing the connection gating of single battery 201
Two branches of circuit 3, two branch road have been connected a relay 401 and relay 402 respectively, two of gating circuit 3
Branch be connected with relay 401,402 after again respectively with two input terminal phases of the dpdt relay 501 in commutating circuit 5
Even, an output contact of dpdt relay 501 is connected with the cathode of auxiliary monomer battery 6, another output end and electricity
Flow sensor 7 is connected with the anode of auxiliary monomer battery 6 again after being connected.The control unit of battery management system controls relay
401, relay 402, which is closed, connects, and the first input contact a, the third input contact c of control dpdt relay 501 are connected
(N then connects the second input contact b, the 4th input contact d when being even number, as shown in figure 4, making auxiliary monomer battery 6 to choosing list
Body battery 201 charges.After charging, the control unit control relay 401,402 of battery management system disconnects, control
The switching switch of dpdt relay 501 is in an intermediate position.
During setting lithium-ion-power cell group 2 is in whole charging, it is that a certain moment is electric to choose single battery 201
Higher single battery is pressed, is needed to carry out balanced management by battery management system selection, battery management system will control the choosing
Middle single battery 201 charges to auxiliary monomer battery 6, when single battery 201 being chosen to charge auxiliary monomer battery 6
Equivalent circuit and relay switch control with lithium-ion-power cell group 2 is whole discharge when auxiliary monomer battery 6 it is right
It is consistent when single battery 201 being chosen to charge, as shown in Figure 3 and Figure 4.
When setting lithium-ion-power cell group 2 and being in static condition, it is a certain moment voltage than auxiliary to choose single battery 201
The single battery that cell voltage is low, battery management system is helped to choose single battery 201 to carry out this by auxiliary monomer battery 6 is controlled
The switch control of charging, equivalent circuit and relay when auxiliary monomer battery 6 is to choosing single battery 201 to charge is equal
With lithium-ion-power cell group 2 is whole discharge when auxiliary monomer battery 6 to choosing single battery 201 to charge when it is consistent, such as Fig. 3 and
Shown in Fig. 4.
When setting lithium-ion-power cell group 2 and being in static condition, it is a certain moment voltage than auxiliary to choose single battery 201
Help the single battery that cell voltage is high, battery management system that will control this and single battery 201 is chosen to carry out auxiliary monomer battery 6
Auxiliary monomer battery 6 when the switch control of charging, equivalent circuit and relay is discharged with 2 entirety of lithium-ion-power cell group
It is consistent when to choosing single battery 201 to charge, as shown in Figure 3 and Figure 4.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The staff for being familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection domain subject to.
Claims (8)
1. a kind of lithium-ion-power cell group active equalization circuit, which is characterized in that the active equalization circuit includes voltage acquisition
Module, lithium-ion-power cell group, auxiliary monomer battery, gating circuit and commutating circuit, the voltage acquisition module it is defeated
Enter end connection lithium-ion-power cell group in each single battery and auxiliary monomer battery, the output end of voltage acquisition module with
The control unit of battery management system connects, lithium-ion-power cell group, gating circuit, commutating circuit and the auxiliary monomer
Battery is sequentially connected, and the commutating circuit is dpdt relay；
Voltage acquisition module acquires the voltage of each single battery, and gating circuit selects a certain monomer electricity in lithium-ion-power cell group
When pond is with auxiliary monomer cell parallel, two switches of dpdt relay are closed, it is dynamic in lithium ion according to the single battery
The location of in power battery pack, the conducting direction of commutating circuit is determined, make itself and auxiliary monomer cell parallel, complete to need equal
Energy transfer between the single battery and auxiliary monomer battery of weighing apparatus.
2. a kind of lithium-ion-power cell group active equalization circuit according to claim 1, which is characterized in that the choosing
Circuit passband includes a plurality of odd number branch and even number branch, and odd number branch circuit parallel connection forms a public output, even number branch together
Road is connected in parallel to form a public output, and even number branch one end and odd number branch one end are alternately connected to lithium ion power
Each single battery both ends in battery pack, the even number branch other end connect the public output that even number branch circuit parallel connection is formed, odd number branch
The public output that road other end connection odd number branch circuit parallel connection is formed, one relay of every branch road series connection.
3. a kind of lithium-ion-power cell group active equalization circuit according to claim 2, which is characterized in that described is double
Two input terminals of dpdt double-pole double-throw (DPDT) relay are connect with two public outputs of gating circuit respectively, and the two of dpdt relay
A output end is connected with the positive and negative electrode of auxiliary monomer battery respectively.
4. a kind of lithium-ion-power cell group active equalization circuit according to claim 1, which is characterized in that for by N
The lithium-ion-power cell group of a concatenated single battery composition, voltage measurement is carried out using N+1 voltage acquisition module,
In, N number of voltage acquisition module is used to carry out voltage measurement to single battery, and 1 voltage acquisition module is used for auxiliary monomer electricity
Pond carries out voltage measurement.
5. a kind of lithium-ion-power cell group active equalization circuit according to claim 1, which is characterized in that described is auxiliary
It is the 25%~150% of the capacity of the single battery in lithium-ion-power cell group to help the capacity of single battery.
6. a kind of lithium-ion-power cell group active equalization circuit according to claim 2, which is characterized in that it is described after
Electric appliance is single-pole single-throw(SPST relay, single-pole double-throw relay, one kind in dpdt relay, or for above-mentioned multiple types after
The combination of electric appliance.
7. a kind of lithium-ion-power cell group active equalization circuit according to claim 3, which is characterized in that the master
Dynamic equalizing circuit is additionally provided with the current sensor for measuring auxiliary monomer battery current, an output end and the electricity of commutating circuit
The anode of auxiliary monomer battery is connected after flow sensor series connection.
8. according to a kind of lithium-ion-power cell group active equalization circuit of claim 1-7 any one of them, which is characterized in that
The balancing procedure of the active equalization circuit is：
The voltage and auxiliary monomer battery of S1, each single battery in voltage acquisition module acquisition lithium-ion-power cell group
Auxiliary battery voltage, if S2 is entered step, if lithium ion power is electric in whole discharge condition in lithium-ion-power cell group
Pond group is in whole charged state, then enters step S3, if lithium-ion-power cell group enters step generally in static condition
Rapid S4；
If the auxiliary battery voltage of S2, voltage acquisition module acquisition is higher than the electricity of minimum single battery in lithium-ion-power cell group
Pressure, then the single battery for selecting the voltage minimum, the minimum single battery of control unit conducting voltage of battery management system with it is auxiliary
The gating circuit and commutating circuit between single battery are helped, using auxiliary monomer battery to list minimum in lithium-ion-power cell group
Body battery charges；If the auxiliary battery voltage of voltage acquisition module acquisition is less than minimum monomer in lithium-ion-power cell group
The voltage of battery wouldn't then carry out equalization operation, lithium-ion-power cell group is made to continue to discharge, and repeat step S2 until lithium ion
Voltage difference in power battery pack between each single battery is less than setting value；
If the voltage of highest single battery is higher than auxiliary monomer electricity in the lithium-ion-power cell group of S3, voltage acquisition module acquisition
The voltage in pond then selects the highest single battery of the voltage, the control unit conducting voltage highest monomer electricity of battery management system
Gating circuit between pond and auxiliary monomer battery and commutating circuit, the highest single battery of voltage fill auxiliary monomer battery
Electricity；If the voltage of highest single battery is less than auxiliary monomer battery in the lithium-ion-power cell group of voltage acquisition module acquisition
Voltage wouldn't then carry out equalization operation, lithium-ion-power cell group is made to continue to charge, and repeat step S3 until lithium ion power electricity
Voltage difference between each single batteries of Chi Zuzhong is less than setting value；
S4, selection voltage are less than the single battery of auxiliary battery voltage, and monomer is chosen in the control unit conducting of battery management system
Gating circuit between battery and auxiliary monomer battery and commutating circuit, using auxiliary monomer battery to choosing single battery to fill
Electricity；Voltage is selected to be higher than the single battery of auxiliary battery voltage, single battery is chosen in the control unit conducting of battery management system
Gating circuit between auxiliary monomer battery and commutating circuit fill auxiliary monomer battery using the single battery chosen
Electricity, auxiliary monomer battery charges to the single battery chosen, the single battery chosen charges to auxiliary monomer battery
Two processes alternately, until the voltage difference in lithium-ion-power cell group between each single battery is less than setting value.
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| CN109193863A (en) * | 2018-10-25 | 2019-01-11 | 湖南金杯新能源发展有限公司 | Battery voltage balance control method and circuit |
| CN110391682A (en) * | 2019-06-24 | 2019-10-29 | 香港生产力促进局 | A kind of battery charge-discharge circuit |
| CN111049216A (en) * | 2019-12-13 | 2020-04-21 | 惠州市亿鹏能源科技有限公司 | Lithium ion power battery power supply device |
| CN111426964A (en) * | 2020-04-29 | 2020-07-17 | 成都极空科技有限公司 | Battery pack voltage acquisition circuit based on MOS (metal oxide semiconductor) tube gating matrix |
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| CN109193863A (en) * | 2018-10-25 | 2019-01-11 | 湖南金杯新能源发展有限公司 | Battery voltage balance control method and circuit |
| CN110391682A (en) * | 2019-06-24 | 2019-10-29 | 香港生产力促进局 | A kind of battery charge-discharge circuit |
| CN110391682B (en) * | 2019-06-24 | 2023-12-01 | 香港生产力促进局 | Battery charging and discharging circuit |
| CN111049216A (en) * | 2019-12-13 | 2020-04-21 | 惠州市亿鹏能源科技有限公司 | Lithium ion power battery power supply device |
| CN111049216B (en) * | 2019-12-13 | 2021-10-08 | 惠州市亿鹏能源科技有限公司 | Lithium ion power battery power supply device |
| CN111426964A (en) * | 2020-04-29 | 2020-07-17 | 成都极空科技有限公司 | Battery pack voltage acquisition circuit based on MOS (metal oxide semiconductor) tube gating matrix |
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Application publication date: 20180831 |