CN113452095B - Battery balance management system and balance management method thereof - Google Patents
Battery balance management system and balance management method thereof Download PDFInfo
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- CN113452095B CN113452095B CN202010219818.8A CN202010219818A CN113452095B CN 113452095 B CN113452095 B CN 113452095B CN 202010219818 A CN202010219818 A CN 202010219818A CN 113452095 B CN113452095 B CN 113452095B
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- 238000007726 management method Methods 0.000 title claims abstract description 87
- 238000012544 monitoring process Methods 0.000 claims abstract description 31
- 239000000178 monomer Substances 0.000 claims description 32
- 230000036541 health Effects 0.000 claims description 14
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
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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
- H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a battery balance management system and a balance management method thereof. The invention monitors the battery state by using the state monitoring module, the control module controls the single equalization module and the group equalization module according to the battery state to realize equalization of electric quantity in the charge and discharge circuit, and the battery is replaced by the reconstruction module. Therefore, the electric quantity of the charge-discharge circuit can be balanced accurately, the replacement of a fault battery can be realized, and the service life of a charge-discharge single circuit is greatly prolonged.
Description
Technical Field
The invention relates to the technical field of vehicle spare and accessory parts, in particular to a battery balance management system and a balance management method thereof.
Background
The differences in the manufacturing and using processes of the power battery cause the inconsistency of the natural existence of the single power battery. The inconsistency is mainly expressed in the aspects of monomer capacity, internal resistance, self-discharge rate, charge-discharge efficiency and the like. The inconsistency of the monomers inevitably brings about the loss of the capacity of the power battery pack, and further causes the reduction of the service life. Meanwhile, the inconsistency of the battery cells is further deteriorated under the influence of random factors such as temperature and vibration conditions as time goes by, so that the parameters are developed toward the discretization direction. Currently, one of the solutions to this problem is to implement equalization of the battery pack through a battery management system.
In current vehicles, most battery equalization management systems perform equalization control based on battery terminal voltage. In the system, when the number of times of using the battery is too large and other internal shapes such as the concentration, the internal resistance and the like of the electrolyte of the battery are changed, the battery is balanced through voltage judgment, and large errors are easily caused.
Disclosure of Invention
In order to solve the above problems, the present invention provides a battery balancing management system, a balancing management method thereof and a balancing management method thereof. The invention monitors the battery state by using the state monitoring module, and the control module controls the single equalization module and the group equalization module according to the battery state to realize equalization of electric quantity in the charge and discharge circuit or replacement of the battery. Therefore, the electric quantity of the charge-discharge circuit can be balanced accurately, the replacement of a fault battery can be realized, and the service life of a charge-discharge single circuit is greatly prolonged.
Specifically, in one aspect, the present invention provides a battery equalization management system, which includes a charge and discharge circuit, a state monitoring module, and a control module, and further includes: the battery pack comprises at least one single battery, and the state monitoring module is connected to the charging and discharging circuit and is used for monitoring the battery state of the single batteries in the charging and discharging circuit; the control module is connected with the state monitoring module and is used for producing an equalization instruction or a reconstruction instruction according to the battery state; the single equalization module is connected to two ends of the single battery, is used for receiving and controlling equalization management between the single battery and the single battery according to the equalization instruction, the group equalization module is connected to two ends of the battery group, is used for receiving and controlling equalization management between the group battery and the group battery according to the equalization instruction, the single equalization module and the group equalization module cooperatively control equalization management between the single battery and the battery group, and the reconstruction module is connected to two ends of the single battery, and is used for receiving and controlling working states of the single battery according to the reconstruction instruction.
Preferably, in the above battery equalization management system, the monomer equalization module includes a monomer equalization circuit, the monomer equalization circuit includes a first switch, a second switch and a monomer transformer, where a first side of the monomer transformer is connected to two ends of the monomer battery, and a first switch is disposed between the first side of the monomer transformer and the monomer battery, a second side of the monomer transformer is parallel to a second side of the monomer transformer in the other monomer equalization modules, a first switch is disposed between the second side of the monomer transformer and a second side of the monomer transformer in the other monomer equalization modules, and a second switch is disposed between an input end of the first side of the monomer transformer and an output end of the second side of the monomer transformer and an input end of the first side of the monomer transformer.
Preferably, in the above battery equalization management system, the group equalization module includes a group equalization circuit, the group equalization circuit includes a first switch, a second switch and a group transformer, a first side of the group transformer is connected to two ends of the battery pack, a first switch is disposed between the first side of the group transformer and the battery pack, a second side of the group transformer is connected in parallel with a second side of the group transformer in other group equalization modules, a first switch is disposed between the second side of the group transformer and a second side of the group transformer in other group equalization modules, and a second switch is disposed between an input end of the first side of the group transformer and an output end of the second side of the group transformer and an input end of the first side of the group transformer.
Preferably, in the above battery equalization management system, the first switch is a switching circuit, a MOSFET switch, or a single-control switch formed by connecting a transistor and a diode in parallel; the second switch is a switching circuit or a MOSFET switch formed by connecting a third transistor and a diode in parallel.
Preferably, in the battery equalization management system, the reconstruction module includes a reconstruction circuit, the reconstruction circuit includes a third switch, and the reconstruction circuit is connected to two ends of the single battery.
Preferably, in the battery equalization management system, the third switch is a switching circuit or a MOSFET switch formed by connecting a transistor and a diode in parallel.
Preferably, in the above battery equalization management system, the state monitoring module includes a battery state of charge monitoring unit, a battery state of health monitoring unit, and a battery remaining life prediction unit.
In another aspect of the present invention, there is provided a battery equalization management method including the steps of: the state monitoring module acquires the battery state of the single battery in the charge-discharge circuit in real time and sends the battery state to the control module; the control module generates an equalization instruction or a reconstruction instruction according to the battery state; the single equalization module controls equalization management between the single batteries according to the equalization instruction; the group equalization module controls equalization management between the battery groups according to the equalization instruction; the single equalization module and the group equalization module cooperatively control equalization management between the single battery and the battery group according to the equalization instruction; and the reconstruction module controls the working state of the single battery according to the reconstruction instruction.
Preferably, in the above battery equalization management method, the battery state includes a state of charge, and the battery equalization management method includes the steps of: when a first battery pack with the average state of charge value larger than a first threshold value and a second battery pack with the average state of charge value smaller than the first threshold value exist in the charge-discharge electric circuit, the control module generates a first equalization instruction, the group equalization module receives the first equalization instruction, and equalization management is carried out between the first battery pack and the second battery pack; or when a first single battery with the state of charge value larger than a second threshold value and a second single battery with the state of charge value smaller than the second threshold value exist in the charge-discharge circuit, the control module generates a second equalization instruction, and the single equalization module receives the second equalization instruction and performs equalization management between the first single battery and the second single battery.
Preferably, in the above battery equalization management system, the battery state includes a health state and/or a remaining life, and the battery equalization management method includes the steps of: the control module generates a reconstruction instruction according to the health state and/or the residual life, and the reconstruction module controls the damaged single battery with low health state value and/or low residual life value to stop working according to the reconstruction instruction and starts working by using the idle single battery in the idle state.
Compared with the prior art, the invention has the advantages that:
1) The battery state is used as a triggering condition for battery equalization or reconstruction, so that the accuracy of battery equalization is greatly improved;
2) A novel battery equalization circuit is constructed, so that the energy loss in the battery equalization process is greatly reduced;
3) The reconstruction circuit can replace damaged or faulty single batteries in time, so that the overall service life of the charging and discharging circuit is prolonged.
Drawings
Fig. 1 is a schematic diagram of a battery equalization management system according to a preferred embodiment of the present invention;
FIG. 2 is a circuit diagram of a monomer equalizing circuit according to a preferred embodiment of the present invention;
fig. 3 is a circuit diagram of a battery pack including 3 cell balancing circuits of fig. 2;
fig. 4 is a circuit diagram of a reconstruction circuit according to a preferred embodiment of the present invention.
Detailed Description
Advantages of the invention will be described in detail below with reference to the drawings and the detailed description.
Referring to fig. 1, a schematic structure of a battery equalization management system according to a preferred embodiment of the present invention is shown. As can be seen from the figure, the battery equalization management system provided in this embodiment includes: the system comprises a charge-discharge circuit, a state monitoring module, a control module, at least one monomer equalization module, at least one group equalization module and at least one reconstruction module.
Wherein the charge-discharge circuit comprises at least one battery pack, and if a plurality of battery packs are arranged, the battery packs are connected in series; each battery pack comprises at least one single battery, and if a plurality of single batteries are arranged, the single batteries are also connected in series.
In this embodiment, a monomer equalization module and a reconstruction module are connected to two ends of each single battery, and a group equalization module is connected to two ends of a battery group. The single equalization module, the group equalization module and the reconstruction module are respectively connected with the control module, and the control module is connected with the state monitoring module. The state monitoring module is connected to the charge-discharge circuit, can monitor the battery state of the single battery in the charge-discharge circuit in real time or at proper preset time intervals, and sends the battery state obtained by monitoring to the control module, the control module analyzes the data of the battery states, generates an equalization instruction or a reconstruction instruction or an equalization instruction and a reconstruction instruction according to the data, respectively sends the equalization instruction to the single equalization module and the group equalization module, and sends the reconstruction instruction to the reconstruction module, so that the single equalization module can receive and control the single battery and the single battery to perform equalization management according to the equalization instruction; the group equalization module can receive and control equalization management between the group battery and the group battery according to the equalization instruction; the single equalization module and the group equalization module work cooperatively and can control equalization management between single batteries and battery groups; then, the reconstruction module receiving the reconstruction instruction can control the working state of the monomer according to the reconstruction instruction. Preferably, the working state herein means that the working is started or stopped. Therefore, in view of the above battery equalization management system, the present embodiment may monitor the battery status, and perform equalization processing on the battery pack and the unit batteries therein according to the battery status, so that the electric quantity in the battery pack and between the battery packs is equalized, thereby prolonging the service life of the battery system; meanwhile, in the embodiment, the reconstruction module is arranged, so that the battery with damage or low service life can be replaced in time, and the service life of the battery system is further prolonged.
Based on the above embodiment, another preferred embodiment consistent with the present invention, wherein the monomer equalizing module includes a monomer equalizing circuit. Referring to fig. 2, a circuit diagram of a single equalizing circuit according to a preferred embodiment of the present invention is shown, in which the single equalizing circuit includes a first switch, a second switch and a single transformer.
The first side of the single transformer is connected to two ends of the single battery, and a first switch is arranged between the first side of the single transformer and the single battery, so that whether the single transformer is connected into the single equalization circuit or not can be controlled through the first switch, and the voltage of the two ends of the single battery can be adjusted.
And the second side of the single transformer is connected in parallel with the second sides of the single transformers in other single balancing modules, and a first switch is also arranged between the second sides of the single transformers in other single balancing modules, so that the single transformers or single batteries connected into the single balancing circuit are controlled through the first switch, the output or input voltage of the target single batteries is selectively controlled, and the balanced management of the single batteries is realized.
Further, a second switch is respectively arranged between the input end of the first side of the single transformer and the output end of the second side of the single transformer and between the output end of the second side of the single transformer and the input end of the first side of the single transformer, so that whether the single battery is connected into the equalizing circuit or not can be controlled through the second switch, and the single battery with the equalizing management requirement can be subjected to targeted and direct equalization management, and the energy consumption of the equalization management is reduced.
Here, the operation principle of the monomer equalizing circuit in the present embodiment is also described in detail with reference to fig. 3. Fig. 3 is a circuit diagram of a battery pack including at least 3 single-cell balancing circuits in fig. 2, where each single cell and the single-cell transformer, the first switch and the second switch form a single-cell balancing circuit according to the manner in the single-cell balancing circuit of the above embodiment, and then the plurality of single cells are connected in series with each other, the second sides of the plurality of single-cell transformers are connected in parallel with each other, and the first switch is disposed between the second sides of the two-cell transformers, so that the circuit is formed as described in fig. 3. Referring to fig. 3, when the first switches M1, M1', m1+, m2+, M2-, mm-, are closed, the second switches Sm, sm' are closed, and simultaneously the first switches M1-, M2', mm', mm+ are opened, and the second switches S1, S2 are opened, the voltage input from the cell C1 is changed after passing through the cell transformers connected to both ends of the cell C1, so that the voltage across the cell Cm is changed without affecting the voltage across the cell C2. Therefore, the effect of targeted battery balance management is achieved.
In summary, the equalization circuit provided in this embodiment can perform targeted and efficient equalization management on the charge and discharge circuit, so as to prolong the service life of the charge circuit, and reduce the energy consumption of the equalization management itself.
Based on the above embodiment, another preferred embodiment consistent with the present invention, wherein the group equalization module includes a group equalization circuit. The group equalization circuit comprises a first switch, a second switch and a group transformer, and the connection mode of the first switch, the second switch and the group transformer with the battery pack is the same as the connection mode of the first switch, the second switch and the group transformer with the single battery in the single equalization circuit in the embodiment. That is, the first side of the group transformer is connected to both ends of the battery pack, and a first switch is provided between the first side of the group transformer and the battery pack; the second side of the group transformer is connected with the second sides of the group transformers in other group equalization circuits in parallel, and a first switch is arranged between the second side of the group transformer and the second sides of the group transformers in other group equalization circuits; second switches are respectively arranged between the input end of the first side of the group transformer and the output end of the second side of the group transformer and between the output end of the second side of the group transformer and the input end of the first side of the group transformer. Therefore, one or more groups of battery packs with balanced management can be targeted to be subjected to overall balanced management through the selective closing or opening of the first switches and the second switches, and the efficiency of battery balanced management is improved.
Based on the above embodiment, when the battery system includes a plurality of battery packs, and each of the two ends of each battery pack is connected to the above-mentioned pack balancing module, each battery pack includes a plurality of battery cells, and each of the two ends of each battery cell is connected to the above-mentioned battery balancing module, by the cooperative cooperation of the pack balancing module and the battery balancing module, that is, by managing the closing and opening of the first switch and the second switch in the pack balancing circuit and the closing and opening of the first switch and the second switch in the battery balancing circuit, the battery packs and battery cells to be balanced can be selectively balanced and managed, so that the balancing management of the battery cells in the whole charge and discharge circuit can be quickly and efficiently realized, the overall service life of the charge and discharge circuit can be greatly prolonged, and the energy consumption of the balancing management itself can be reduced.
In another preferred embodiment consistent with the present invention, based on the above embodiment, the reconstruction module includes a reconstruction circuit including a third switch therein. Referring to fig. 4, each reconstruction circuit may preferably include two third switches, and a plurality of reconstruction circuits in the same battery pack are connected in parallel with each other. Therefore, the single battery connected to the charging and discharging circuit can be directly selected by managing the closing or opening of the third switch, so that the single battery can be conveniently replaced.
Based on the above embodiment, in another preferred embodiment consistent with the present invention, preferably, a switching circuit including a transistor and a diode connected in parallel may be used as the first switch and/or the second switch and/or the third switch, wherein the transistor connected in parallel in the switching circuit realizes the closing or opening of the switching circuit, and the diode realizes the protection of the transistor, preventing the transistor from being broken down by the anti-peak voltage, improving the safety and the service life of the circuit; MOSFET switches may also be employed as the first and/or second and/or third switches, the sensitivity of which may improve circuit safety; the single-control switch can be used as the first switch, the control is simple, and the circuit cost can be reduced.
In another preferred embodiment consistent with the present invention, the state monitoring module includes a battery state of charge monitoring unit, a battery state of health monitoring unit, and a battery remaining life prediction unit.
Preferably, in this embodiment, the battery state of charge is used as a measure for battery balancing management, for example, a first threshold is set, and balancing management is performed between the battery group with the average state of charge value higher than the first threshold and the battery group with the average state of charge value lower than the first threshold; preferably, a second threshold value can be set at the same time, and equalization management is performed between the single battery with the state of charge value higher than the second threshold value and the single battery with the state of charge value lower than the second threshold value in the same battery pack; preferably, a third threshold may be set, and in the whole charge-discharge circuit, without being limited by the battery pack, the equalization management may be directly performed between the unit cells having a state-of-charge value higher than the third threshold and the unit cells having a state-of-charge value lower than the third threshold.
Preferably, in this embodiment, the battery state of health and/or the remaining life are used as the measurement standard for performing the reconstruction management, for example, a fourth threshold is set, when the battery state of health and/or the remaining life of a certain single battery is obtained and is smaller than the fourth threshold, the single battery is regarded as a damaged single battery, and the reconstruction module is started to replace the damaged single battery with the idle single battery in the idle state.
In another aspect, the present invention further provides a method for managing point-out balance, where the method is based on the battery balance management system provided in the foregoing embodiments, and specifically includes the following steps:
the state monitoring module acquires the battery state of the single battery in the charging and discharging circuit in real time and sends the battery state to the control module;
the real-time may be to maintain a monitoring state and to feed back when a change is detected; or monitoring and feeding back every preset time; or monitoring every preset time, and feeding back when the change is detected, etc. The specific monitoring and feedback modes of the state monitoring module can be designed and adjusted according to specific situations.
-the control module generates an equalization instruction or a reconstruction instruction depending on the battery status;
-a cell balancing module controlling balancing management between cells according to the balancing instruction, a group balancing module controlling balancing management between battery groups according to the balancing instruction, the cell balancing module and the group balancing module cooperatively controlling balancing management between cells and battery groups according to the balancing instruction;
-a reconstruction module controlling the working state of the single cells according to the reconstruction instructions.
Preferably, the operation state includes start-up operation or stop operation, etc.
In another preferred embodiment consistent with the present invention, based on the above embodiment, the battery state includes a state of charge, and the battery equalization management method includes the steps of:
-the control module generates a first equalization command when there is a first battery group in the charge-discharge electrical circuit having an average state of charge value greater than a first threshold value and a second battery group having an average state of charge value less than the first threshold value;
-the group equalization module receives the first equalization instruction, performing equalization management between the first battery group and the second battery group; or alternatively
-the control module generates a second equalization command when there is a first cell in the charge-discharge circuit having a state of charge value greater than a second threshold value and a second cell having a state of charge value less than the second threshold value;
-the cell balancing module receives the second balancing instruction, performing balancing management between the first cell and the second cell.
Preferably, the balancing management mode includes that a balancing circuit comprising a transformer and a switch is adopted, the single battery or the battery pack to be balanced and managed is selected by utilizing the closing and opening of the switch, and the voltage at two ends of the single battery or the battery pack is balanced and managed by utilizing the transformer.
In another preferred embodiment consistent with the present invention, based on the above embodiment, the battery state includes a state of health and/or a remaining life, and the battery equalization management method includes the steps of:
the control module generates a reconstruction instruction from the state of health and/or remaining life,
-the reconstruction module controls the damaged cells with low values of state of health and/or low values of remaining life to stop working and to start working using the free cells in the idle state according to the reconstruction instructions.
Preferably, the reconstruction method includes using a reconstruction circuit including a switch, stopping the operation of the damaged unit cell by closing and opening the switch, and simultaneously starting the operation of the idle unit cell.
In summary, the battery equalization management system and method provided by the invention use the battery state as the triggering condition of battery equalization or reconstruction, so that the accuracy of battery equalization is greatly improved; a novel battery equalization circuit is constructed, so that the energy loss in the battery equalization process is greatly reduced; meanwhile, the reconstruction circuit can replace damaged or faulty single batteries in time, so that the overall service life of the charging and discharging circuit is prolonged.
The above description of the specific embodiments of the present invention has been given by way of example only, and the present invention is not limited to the above described specific embodiments. Any equivalent modifications and substitutions for the present invention will occur to those skilled in the art, and are also within the scope of the present invention. Accordingly, equivalent changes and modifications are intended to be included within the scope of the present invention without departing from the spirit and scope thereof.
Claims (9)
1. A battery balance management system comprises a charge and discharge circuit, a state monitoring module and a control module, and is characterized by further comprising
The battery pack comprises at least one single equalization module, at least one group equalization module and at least one reconstruction module, wherein the charge-discharge circuit comprises at least one battery pack which are mutually connected in series,
the battery pack comprises at least one single battery, the single batteries are mutually connected in series,
the state monitoring module is connected to the charge-discharge circuit and used for monitoring the battery state of the single battery in the charge-discharge circuit;
the control module is connected with the state monitoring module and is used for producing an equalization instruction or a reconstruction instruction according to the battery state;
the single equalization module is connected with two ends of the single battery and used for receiving and controlling the equalization management between the single battery and the single battery according to the equalization instruction,
the group equalization module is connected with two ends of the battery pack and used for receiving and controlling equalization management between the battery pack and the battery pack according to the equalization instruction,
the single cell balancing module and the group balancing module cooperatively control balancing management between the single cells and the battery group, and the reconstruction module is connected to two ends of the single cells and used for receiving and controlling the working state of the single cells according to the reconstruction instruction;
the monomer equalizing module comprises a monomer equalizing circuit, wherein the monomer equalizing circuit comprises a first switch, a second switch and a monomer transformer, and the monomer equalizing circuit comprises a first switch, a second switch and a monomer transformer
The first side of the single transformer is connected with the two ends of the single battery, a first switch is arranged between the first side of the single transformer and the single battery,
the second side of the single transformer is connected with the second sides of the single transformers in other single equalization modules in parallel, a first switch is arranged between the second side of the single transformer and the second sides of the single transformers in other single equalization modules,
and second switches are respectively arranged between the input end of the first side of the single transformer and the output end of the second side of the single transformer and between the output end of the second side of the single transformer and the input end of the first side of the single transformer.
2. The battery equalization management system of claim 1, wherein,
the group equalization module comprises a group equalization circuit which comprises a first switch, a second switch and a group transformer,
the first side of the group transformer is connected with two ends of the battery group, a first switch is arranged between the first side of the group transformer and the battery group,
the second side of the group transformer is connected in parallel with the second sides of the group transformers in the other group equalization modules,
a first switch is arranged between the second side of the group transformer and the second sides of the group transformers in the other group equalization modules,
second switches are respectively arranged between the input end of the first side of the group transformer and the output end of the second side of the group transformer and between the output end of the second side of the group transformer and the input end of the first side of the group transformer.
3. The battery equalization management system of claim 2, wherein,
the first switch is a switching circuit, a MOSFET switch or a single-control switch formed by connecting a third transistor and a diode in parallel;
the second switch is a switching circuit or a MOSFET switch formed by connecting a third transistor and a diode in parallel.
4. The battery equalization management system of claim 1, wherein,
the reconstruction module comprises a reconstruction circuit, the reconstruction circuit comprises a third switch, and the reconstruction circuit is connected to two ends of the single battery.
5. The battery equalization management system of claim 4, wherein,
the third switch is a switching circuit or a MOSFET switch formed by connecting a third transistor and a diode in parallel.
6. The battery equalization management system of any of claims 1-5, wherein,
the state monitoring module comprises a battery state of charge monitoring unit, a battery state of health monitoring unit and a battery remaining life prediction unit.
7. A battery equalization management method, applied to the battery equalization management system of claim 1, comprising the steps of:
the state monitoring module acquires the battery state of the single battery in the charge-discharge circuit in real time, sends the battery state to the control module, the control module produces an equalization instruction or a reconstruction instruction according to the battery state,
the single equalization module controls the equalization management between the single batteries according to the equalization instruction, the group equalization module controls the equalization management between the battery group and the battery group according to the equalization instruction,
the single equalization module and the group equalization module cooperatively control the equalization management between the single battery and the battery group according to the equalization instruction,
and the reconstruction module controls the working state of the single battery according to the reconstruction instruction.
8. The battery equalization management method of claim 7, wherein,
the battery state includes a state of charge,
the battery balance management method comprises the following steps:
when a first battery pack with the average state of charge value larger than a first threshold value and a second battery pack with the average state of charge value smaller than the first threshold value exist in the charge-discharge circuit,
the control module generates a first equalization instruction,
the group equalization module receives the first equalization instruction and performs equalization management between the first battery group and the second battery group; or alternatively
When a first single battery with a state of charge value larger than a second threshold value and a second single battery with a state of charge value smaller than the second threshold value exist in the charge-discharge circuit, the control module generates a second equalization instruction, the single equalization module receives the second equalization instruction, and equalization management is conducted between the first single battery and the second single battery.
9. The battery equalization management method of claim 7 or 8, wherein,
the battery state includes a state of health and/or remaining life,
the battery balance management method comprises the following steps:
the control module generates a reconfiguration instruction based on the state of health and/or remaining life,
and the reconstruction module controls the damaged single battery with low health state value and/or low residual life value to stop working according to the reconstruction instruction, and starts working by using the idle single battery in the idle state.
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| JP3175574U (en) * | 2012-02-29 | 2012-05-17 | 李佳原 | Discharge-type battery management device |
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| JP3175574U (en) * | 2012-02-29 | 2012-05-17 | 李佳原 | Discharge-type battery management device |
| CN104821632A (en) * | 2015-05-21 | 2015-08-05 | 重庆大学 | Battery system charging voltage balance control method and system |
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| DE102017122061A1 (en) * | 2017-09-22 | 2019-03-28 | Borgward Trademark Holdings Gmbh | Method, Apparatus and Vehicle for Equalizing Power Battery |
| CN109038712A (en) * | 2018-07-18 | 2018-12-18 | 华中科技大学 | A kind of liquid metal cell group balance control method and tolerant system |
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