CN210092895U - Battery pack balance management control system - Google Patents
Battery pack balance management control system Download PDFInfo
- Publication number
- CN210092895U CN210092895U CN201920237706.8U CN201920237706U CN210092895U CN 210092895 U CN210092895 U CN 210092895U CN 201920237706 U CN201920237706 U CN 201920237706U CN 210092895 U CN210092895 U CN 210092895U
- Authority
- CN
- China
- Prior art keywords
- battery
- unit
- equalizing
- battery pack
- charging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007599 discharging Methods 0.000 claims abstract description 40
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a balanced management control system of group battery, it includes: the charging and discharging control unit comprises a detection unit, a balanced battery selection unit and a balanced loop unit which are electrically connected with the charging and discharging control unit; the detection unit is suitable for detecting the total current parameter of the battery pack, the voltage parameter of each single battery in the battery pack and the equalizing current parameter in the equalizing loop unit and sending the parameters to the charging and discharging control unit, and the charging and discharging control unit is suitable for controlling the equalizing battery selection unit to select the corresponding single battery in the battery pack to be connected to the equalizing loop unit according to the detection result given by the detection unit and carrying out charging and discharging equalization by controlling the equalizing loop unit; the utility model discloses a after detecting corresponding parameter in the system, control the equilibrium of charge-discharge according to the parameter variation value, overcome the uneven problem that leads to overcharging, overdischarging, excess temperature of traditional group battery charge-discharge in-process electric current, improved the life of this system.
Description
Technical Field
The utility model relates to a balanced field of group battery especially relates to a balanced management control system of group battery.
Background
The large-scale battery pack adopts series connection work for improving the system voltage, but the performance of single batteries in the series battery pack is different due to various reasons (including materials, production, storage, working environment and the like), and the larger the battery with poor performance is damaged in the charging and discharging process, the more the battery is easily damaged, the overcharge, the overdischarge, the over-temperature and the like are easily caused, and the life cycle of the whole battery pack is seriously influenced. At present, the energy storage of a single battery can obtain a better effect, but the energy storage of a large-scale battery pack needs to connect a large number of batteries with small capacity and low voltage in series and in parallel, and the effect is not ideal; because the difference exists among the single batteries due to various reasons, the difference is increased in the using process of the battery string, so that the batteries with poorer performance become worse, and the energy storage effect of the whole battery pack is influenced.
Therefore, it is necessary to develop a new battery pack balancing management control system to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a balanced management control system of group battery.
In order to solve the technical problem, the utility model provides a balanced management control system of group battery, it includes: the charging and discharging control unit comprises a detection unit, a balanced battery selection unit and a balanced loop unit which are electrically connected with the charging and discharging control unit; the detection unit is suitable for detecting the total current parameter of the battery pack, the voltage parameter of each single battery in the battery pack and the equalizing current parameter in the equalizing loop unit and sending the parameters to the charging and discharging control unit, and the charging and discharging control unit is suitable for controlling the equalizing battery selection unit to select the corresponding single battery in the battery pack to be connected to the equalizing loop unit according to the detection result given by the detection unit and carrying out charging and discharging equalization by controlling the equalizing loop unit; the equalization loop unit includes: a plurality of switches, a freewheeling circuit and a balancing battery; each switch is connected with the equalizing battery, and each switch is controlled by the charge and discharge control unit by sending a PWM control signal, namely the current-carrying capacity of the corresponding switch is controlled, so as to adjust the output mode of the equalizing loop unit; the balance battery is suitable for storing balance transfer electric energy, and the follow current circuit carries out follow current protection through a choke inductor and an RC circuit.
Further, the equalization loop unit further includes: the first diode and the second diode are electrically connected with the equalizing battery; the first diode is suitable for freewheeling when the equalizing battery is charged; the second diode is adapted to freewheel when the equalizing cell is discharging.
Further, the balancing battery selection unit includes: the two-way switches are electrically connected with the charge and discharge control unit; and the charge and discharge control unit controls the corresponding single battery in the battery pack to be connected into the equalizing loop unit by controlling the on-off of the corresponding two-way switch.
Further, the detection unit includes: the current measuring sensor is electrically connected with the equalizing loop unit; the current measuring sensor is suitable for collecting balance current parameters, and the charging and discharging control unit controls the corresponding switch states of the balance loop unit according to the balance current parameters so as to balance charging and discharging of the battery pack.
The beneficial effects of the utility model are that, the utility model discloses a after detecting corresponding parameter in the system, control the equilibrium of charge-discharge according to the parameter variation value, overcome traditional group battery and lead to the problem of overcharge, overdischarge, excess temperature at charge-discharge in-process electric current unbalance, improved the life of this system.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic block diagram of a battery pack equalization management control system according to the present invention;
fig. 2 is a circuit diagram of the battery pack equalization management control system of the present invention.
In the figure: first diode D1A second diode D2And a choke inductance L.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
Fig. 1 is a schematic block diagram of a battery pack equalization management control system according to the present invention.
In this embodiment, as shown in fig. 1, a battery pack balancing management control system according to this embodiment includes: the charging and discharging control unit comprises a detection unit, a balanced battery selection unit and a balanced loop unit which are electrically connected with the charging and discharging control unit; the detection unit is suitable for detecting the total current parameter of the battery pack, the voltage parameter of each single battery in the battery pack and the equalizing current parameter in the equalizing loop unit and sending the parameters to the charging and discharging control unit, and the charging and discharging control unit is suitable for controlling the equalizing battery selection unit to select the corresponding single battery in the battery pack to be connected to the equalizing loop unit according to the detection result given by the detection unit and carrying out charging and discharging equalization by controlling the equalizing loop unit.
In this embodiment, after the corresponding parameters in the system are detected, the balance of charging and discharging is controlled according to the parameter variation value, so that the problems of overcharge, overdischarge and over-temperature caused by unbalanced current in the charging and discharging process of the conventional battery pack are solved, and the service life of the system is prolonged.
In this embodiment, the charge and discharge control unit may adopt, but is not limited to, a TMS320F28335 processor.
In the present embodiment, the direct-current power source represents a charge-discharge current; CT0Is a current detection sensor capable of detecting in forward and reverse directionsThe amount is used for detecting the flow direction and the magnitude of the charging and discharging current of the battery pack.
In the present embodiment, by controlling the switch (S)1、S2…Sn) Selecting the single cells to be equalized1、 B2…Bn) (ii) a When the battery pack is charged, selecting the single battery with the highest voltage (or the highest SOC) for balancing; when the battery pack discharges, selecting the single battery with the lowest voltage (or the lowest SOC) for balancing; fuse (FU)1、FU2…FUn+1) And when the equalizing line is short-circuited, protection is carried out.
Fig. 2 is a circuit diagram of the battery pack equalization management control system of the present invention.
In order to avoid overvoltage generated by the persistent current of the inductor when the switch in the line is switched, the equalizing loop unit performs the free-wheeling protection, as shown in fig. 2, and includes: several switches (in this embodiment, S is used)A、SB、SC、SD) A follow current circuit and an equalizing battery; each switch is controlled by the charge and discharge control unit by sending a PWM control signal so as to adjust the output mode of the equalizing loop unit; the balance battery is suitable for storing balance transfer electric energy, and the follow current circuit carries out follow current protection through a choke inductor L and an RC circuit.
In this embodiment, each switch is connected to the equalizing battery, and the charge and discharge control unit sends out a PWM control signal to control the current-carrying capacity of the corresponding switch to control the equalizing battery to charge or discharge, thereby controlling the charge and discharge equalization of the battery pack.
In this embodiment, according to corresponding acquisition parameters in the circuit, the output mode of the equalization loop unit is divided into a normal equalization mode and a fault equalization mode, and the normal equalization mode can be divided into a forced equalization mode, a natural equalization mode and an equal current equalization mode; the service life of the battery pack is prolonged by reducing the action times of the switching device; unnecessary energy transfer is avoided, and energy loss is reduced; the phenomenon of overcharge and overdischarge of the equalized battery and the equalizing battery can not occur.
In the present embodiment, it is preferred that,the equalizing battery B can be selected from the single batteries in the battery pack (B)1、B2…Bn) The same or equivalent super capacitor bank may be different from the single battery in the battery pack, but the matching between the charging and discharging current and the equalizing current must be performed precisely.
In order to ensure the follow current when the battery pack is charged and discharged, as shown in fig. 2, the equalizing loop unit further includes: a first diode D electrically connected with the equalizing battery1A second diode D2(ii) a The first diode D1Adapted to freewheel when the equalizing cell is charging; the second diode D2Is adapted to freewheel when the balancing battery is discharging.
In this embodiment, the freewheel circuit includes: a choke inductor L, RC, wherein the choke inductor L has a choke function to ensure the stability of current when the PWM control signal provided by the charge/discharge control unit is modulated, and its parameter value is based on the wave frequency of the PWM control signal, the maximum current threshold of the balance loop, the balance line resistance, and the first diode D1A second diode D2Comprehensively determining the parameters; the RC circuit prevents the continuous current of the choke inductor L from generating overvoltage when the switch in the circuit is switched, and plays a role of follow current protection.
In order to avoid selecting two groups of single batteries simultaneously to cause faults, the balanced batteries are selected by adopting a two-way switch, and the reliability of the system is improved by adopting signal and hardware double interlocking, as shown in fig. 2, the balanced battery selection unit comprises: the two-way switches are electrically connected with the charge and discharge control unit; and the charge and discharge control unit controls the corresponding single battery in the battery pack to be connected into the equalizing loop unit by controlling the on-off of the corresponding two-way switch.
In order to control the equalization mode according to the equalization current parameter, the detection unit comprises: the current measuring sensor is electrically connected with the equalizing loop unit; the current measuring sensor is suitable for collecting balance current parameters, and the charging and discharging control unit controls the corresponding switch states of the balance loop unit according to the balance current parameters so as to balance charging and discharging of the battery pack.
In the present embodiment, the current measuring sensor CT in the equalization loopJThe method is required to have higher precision and can detect the current in the forward and reverse directions.
In summary, the utility model controls the balance of charging and discharging according to the parameter variation value after detecting the corresponding parameters in the system, overcomes the problems of over-charging, over-discharging and over-temperature caused by unbalanced current in the charging and discharging process of the traditional battery pack, and prolongs the service life of the system; the balance battery (or the equivalent super capacitor bank) which is completely the same as the battery pack is adopted as a balance component, so that the feasibility is realized in engineering, customization is not needed, and the cost is low; when the performance of a certain single battery in the battery pack is remarkably reduced, the battery pack can be replaced by a balance battery, so that the service life cycle of the battery pack is delayed; through the equalizing loop unit, no matter the number of the single batteries connected in series in the battery pack, capacity expansion or change is not needed, the system is convenient to expand, the structure is simple, the reliability of the system can be improved, and the applicability is strong; the PWM control signal is adopted for modulation, only one choke inductor is needed, and no special requirements are made on the size and precision of parameter values, so that the engineering is convenient to realize; by adopting the RC circuit as a surge suppression loop, the bidirectional working can be realized, the electromagnetic interference is easily reduced, and the reliability is improved; the balanced battery is selected by adopting a double-circuit switch, and the double interlocking of signals and hardware is adopted, so that the fault caused by the simultaneous selection of two batteries is avoided, and the reliability of the system is improved; the action times of the switch device are reduced as much as possible, and the service life is prolonged; unnecessary energy transfer is avoided, and energy loss is reduced; ensuring that the equalized battery and the equalizing battery can not generate the phenomenon of over-charge and over-discharge; when the system is in static state or only the control system of the equipment works, namely the battery pack only has very small charging and discharging current or no working current at all, the equalization is not carried out, the unnecessary transfer of energy is avoided, and the system efficiency is improved; when the charging and discharging of the battery pack are finished, the balancing process is delayed for a period of time in a natural balancing mode, and when the charging is finished, if the voltage (or SOC) of a battery in the battery pack is higher than that of a balancing battery, the natural balancing is delayed to transfer a part of energy of the battery with high voltage (or SOC) to the balancing battery, so that the battery in the battery pack is ensured not to be overcharged (or over-pressurized); and simultaneously, enough energy of the equalizing battery is ensured to be available during discharging. When the discharging is finished, if the voltage (or SOC) of a battery in the battery pack is lower than that of the balancing battery, delaying natural balancing to transfer the energy in the balancing battery to the battery with low voltage (or SOC), and ensuring that the battery in the battery pack cannot be over-discharged (or under-voltage); when the system performs natural equalization, the resistance measurement of the equalization loop unit is performed, including the resistances of a line and a switch, the internal resistances of the equalized and equalized batteries and the like, and the battery pack can indirectly reflect the performance of the batteries in the battery pack by comparing the resistances of the batteries in the battery pack when the batteries are equalized, so that parameter basis is provided for the calculation of SOC, SOH and SOF; the SOH of the battery pack is indirectly calculated by counting the percentage of the action times of a certain selection switch in the battery pack to the action times of all switches, and a basis can be provided for the calculation of the SOF.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. A battery pack equalization management control system, comprising:
the charging and discharging control unit comprises a detection unit, a balanced battery selection unit and a balanced loop unit which are electrically connected with the charging and discharging control unit; wherein
The detection unit is suitable for detecting the total current parameter of the battery pack, the voltage parameter of each single battery in the battery pack and the balance current parameter in the balance loop unit and sending the parameters to the charge and discharge control unit, and
the charging and discharging control unit is suitable for controlling the equalizing battery selection unit to select corresponding single batteries in the battery pack to be connected into the equalizing loop unit according to the detection result given by the detection unit, and the equalizing loop unit is controlled to perform charging and discharging equalization;
the equalization loop unit includes: a plurality of switches, a freewheeling circuit and a balancing battery;
each switch is connected with the equalizing battery, and each switch is controlled by the charge and discharge control unit by sending a PWM control signal, namely the current-carrying capacity of the corresponding switch is controlled, so as to adjust the output mode of the equalizing loop unit;
the balance battery is suitable for storing balance transfer electric energy, and the follow current circuit carries out follow current protection through a choke inductor and an RC circuit.
2. The battery pack balancing management control system according to claim 1,
the equalization loop unit further includes: the first diode and the second diode are electrically connected with the equalizing battery;
the first diode is suitable for freewheeling when the equalizing battery is charged;
the second diode is adapted to freewheel when the equalizing cell is discharging.
3. The battery pack balancing management control system according to claim 1,
the balancing battery selection unit includes: the two-way switches are electrically connected with the charge and discharge control unit;
and the charge and discharge control unit controls the corresponding single battery in the battery pack to be connected into the equalizing loop unit by controlling the on-off of the corresponding two-way switch.
4. The battery pack balancing management control system according to claim 1,
the detection unit includes: the current measuring sensor is electrically connected with the equalizing loop unit;
the current measuring sensor is suitable for collecting balance current parameters, and the charging and discharging control unit controls the corresponding switch states of the balance loop unit according to the balance current parameters so as to balance charging and discharging of the battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920237706.8U CN210092895U (en) | 2019-02-25 | 2019-02-25 | Battery pack balance management control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920237706.8U CN210092895U (en) | 2019-02-25 | 2019-02-25 | Battery pack balance management control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210092895U true CN210092895U (en) | 2020-02-18 |
Family
ID=69471003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920237706.8U Expired - Fee Related CN210092895U (en) | 2019-02-25 | 2019-02-25 | Battery pack balance management control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210092895U (en) |
-
2019
- 2019-02-25 CN CN201920237706.8U patent/CN210092895U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9118191B2 (en) | Cell balancing method, cell balancing device, and energy storage system including the cell balancing device | |
| CN112737015B (en) | Lithium battery balance control system and control method based on SOC | |
| CN110061531B (en) | Energy storage battery equalization method | |
| CN105449296A (en) | Nondestructive equilibrium management system of modular high-power battery pack | |
| CN110048487A (en) | A kind of control method and its system of battery charging and discharging | |
| JP5625045B2 (en) | Electrical system and method for charging a rechargeable battery | |
| KR20130091951A (en) | Battery pack, controlling method of the same, and power storage system including the battery pack | |
| CN104701926A (en) | Battery system and method for connecting a battery to the battery system | |
| CN101740827A (en) | Active equalization system of lithium-ion power battery and equalization method thereof | |
| CN103236732B (en) | Active equalizing system and equalizing method for power lithium ion battery pack | |
| CN204905967U (en) | Harmless balanced management system of high -power group battery of modularization | |
| CN106253417A (en) | A kind of double loop redundancy active equalization battery management system and control method thereof | |
| CN108667107B (en) | Storage battery pack equalization circuit comprising auxiliary battery and control method | |
| CN104600801A (en) | Charging and discharging balancing circuit and method of series battery pack | |
| CN103036258A (en) | Battery pack balancing system and method | |
| CN202309117U (en) | Balanced system for storage battery pack | |
| CN108964179A (en) | Battery equalization system and method | |
| CN106848461B (en) | A kind of satellite adaptive charging method of battery group | |
| JP2024507529A (en) | Method and system for performing battery balancing on electrical series strings of lithium ion batteries | |
| CN105141004A (en) | Equalizing charging system for liquid state metal battery | |
| CN202309119U (en) | Single inductance type storage battery equalizing circuit | |
| Ekanayake et al. | Active and passive based hybrid cell balancing approach to series connected lithium-ion battery pack | |
| Wen et al. | A new evaluation method to the consistency of lithium-ion batteries in electric vehicles | |
| CN103036257A (en) | Equalizing circuit and method for single inductance type storage battery group | |
| CN210092895U (en) | Battery pack balance management control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |