CN204334038U - The charge/discharge balancing system of power battery pack - Google Patents
The charge/discharge balancing system of power battery pack Download PDFInfo
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- CN204334038U CN204334038U CN201420842319.4U CN201420842319U CN204334038U CN 204334038 U CN204334038 U CN 204334038U CN 201420842319 U CN201420842319 U CN 201420842319U CN 204334038 U CN204334038 U CN 204334038U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a kind of charge/discharge balancing system of power battery pack, comprise battery management system, on-off controller, switch arrays, discharge and recharge port, charger and discharger.Battery management system gathers each monomer battery voltage information and sends on-off controller to.On-off controller, according to information of voltage control switch array, makes the cell waiting to fill or discharge communicate with discharge and recharge port through switch arrays.Discharge and recharge port divides two-way, is connected respectively with charger, discharger, when there is cell to be charged, cell to be charged is communicated with charger, when there is cell to be discharged, cell to be discharged is communicated with discharger.The utility model is cooperatively interacted by battery management system and on-off controller, realize needing balanced cell to carry out man-to-man balance charge/discharge in power battery pack by switch arrays, energy ezpenditure in charge and discharge process is little, workable, and balance charge/discharge efficiency is high.
Description
Technical field
The utility model relates to a kind of charge/discharge balancing system of the power battery pack for such as electric automobile, belongs to power control technology field.
Background technology
Power battery pack for electric automobile is in series by multiple cell.Because cell performance exists inconsistency, there will be monomer battery voltage when discharge and recharge inconsistent, and then affect and govern the charging and discharging capabilities of whole power battery pack.In actual use, in power battery pack, the voltage deviation degree of each cell should control within the specific limits, otherwise cell very easily overcharges or excessively put, and has a strong impact on its fail safe.Equalizing charge is carried out to Individual cells or electric discharge is the important channel solved the problem, so both can play battery performance better, the whole service life of power battery pack can be extended again.
The technology path of current equalizing circuit has two kinds: one is passive equalizing circuit, also referred to as energy consumption type equalizing circuit, be typically employed in the mode of cell two ends parallel resistance, heat energy is converted electric energy to by resistance, reach the balance of voltage, but this circuit had both consumed the energy of cell, turn increased the difficulty of cell heat management.Another kind is active equalization circuit, also be non-energy consumption equalizing circuit, utilize the energy-storage travelling wave tube such as inductance or electric capacity, the energy trasfer of cell high for capacity in power battery pack to capacity battery on the low side, this circuit is by switch-capacitor switch, the energy of neighboring unit cell is transmitted by electric capacity, or by the mode of inductive energy storage, bi-directional energy is carried out between neighboring unit cell, although the energy loss of this circuit is very little, but reach equilibrium must have and repeatedly transmit, so balancing speed is slower, be unsuitable for the power battery pack that series connection monomer number of batteries is more.
As can be seen here, design a kind of circuit simple, run discharge and recharge technical scheme easily, be current urgent problem.
Utility model content
The purpose of this utility model is the charge/discharge balancing system providing a kind of power battery pack, cooperatively interacted by battery management system and on-off controller, realize needing balanced cell to carry out man-to-man balance charge/discharge in power battery pack by switch arrays, energy ezpenditure in charge and discharge process is little, workable, balance charge/discharge efficiency is high.
To achieve these goals, the utility model have employed following technical scheme:
A charge/discharge balancing system for power battery pack, is characterized in that: it comprises battery management system, on-off controller and switch arrays, discharge and recharge port, charger and discharger, wherein:
Battery management system gathers the information of voltage of each cell be connected in series in power battery pack and sends information of voltage to on-off controller;
On-off controller carrys out control switch array according to the information of voltage received, cell to be charged and to be discharged in power battery pack is communicated with discharge and recharge port via switch arrays one by one, wherein, the voltage deviation value of cell to be charged is less than 0 and absolute value is greater than Deviation Control threshold value, and the voltage deviation value of cell to be discharged is greater than 0 and is greater than Deviation Control threshold value;
Discharge and recharge port divides two-way, one tunnel is connected with charger, another road is connected with discharger, the circuit that discharge and recharge port is connected with charger is provided with the first switch, the circuit that discharge and recharge port is connected with discharger is provided with second switch, first switch and opening of second switch control by on-off controller with closed, wherein, when there is cell to be charged, first switch closes and makes cell to be charged via switch arrays, discharge and recharge port, first switch is communicated with charger, when there is cell to be discharged, second switch closes and makes cell to be discharged via switch arrays, discharge and recharge port, second switch is communicated with discharger.
The utility model has the advantages that:
The internal energy of the utility model not consumption of power battery pack, also energy trasfer is there is not between cell, but cooperatively interacted by battery management system and on-off controller, realize needing balanced cell to carry out man-to-man balance charge/discharge in power battery pack by switch arrays, keep the state-of-charge (SOC) of power battery pack to maintain all the time in the reasonable scope, effectively extend the whole service life of power battery pack.
Balanced way of the present utility model has directive property and is easy to realize, be different from online balanced way, the utility model only plays a role when needs are balanced, energy ezpenditure is little, workable, improve the efficiency of balance charge/discharge, when especially charge or discharge needing for single cell, the reparation to cell can be realized when not taking battery case apart.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of the utility model charge/discharge balancing system.
Fig. 2 is the circuit connection diagram of the embodiment 1 of the utility model charge/discharge balancing system.
Fig. 3 is the circuit connection diagram of the embodiment 2 of the utility model charge/discharge balancing system.
Embodiment
As shown in Figure 1, the charge/discharge balancing system of the utility model power battery pack comprises battery management system 20, on-off controller 40 and switch arrays 30, discharge and recharge port 50, charger 60 and discharger 70, wherein:
Battery management system 20 gathers in power battery pack 10 information of voltage of each cell be connected in series, information of voltage comprises the voltage at cell two ends, and send information of voltage to on-off controller 40, as Fig. 1, carry out communication between battery management system 20 and on-off controller 40, battery management system 20 carries out the detection of voltage by the control of on-off controller 40;
On-off controller 40 carrys out control switch array 30 according to the information of voltage received, cell to be charged and to be discharged in power battery pack 10 is communicated with discharge and recharge port 50 via switch arrays 30 one by one, wherein, the voltage deviation value of cell to be charged is less than 0 and absolute value is greater than Deviation Control threshold value, the voltage deviation value of cell to be discharged is greater than 0 and is greater than Deviation Control threshold value, and the voltage deviation value of cell equals the average that self both end voltage value deducts each cell both end voltage value in power battery pack 10;
Discharge and recharge port 50 points of two-way, one tunnel is connected with charger 60, another road is connected with discharger 70, the circuit that discharge and recharge port 50 is connected with charger 60 is provided with the first K switch A, the circuit that discharge and recharge port 50 is connected with discharger 70 is provided with second switch KB, opening of first K switch A and second switch KB can control by on-off controller 40 with closed, or also can Non-follow control, wherein, when there is cell to be charged, first K switch A closes and makes cell to be charged via switch arrays 30, discharge and recharge port 50, first K switch A is communicated with charger 60, when there is cell to be discharged, second switch KB closes and makes cell to be discharged via switch arrays 30, discharge and recharge port 50, second switch KB is communicated with discharger 70.
As Fig. 1, the detection port of battery management system 20 is connected with the two ends of each cell be connected in series in power battery pack 10, to be used for detecting cell both end voltage, the PORT COM of battery management system 20 is connected with the PORT COM of on-off controller 40, communication is carried out between battery management system 20 and on-off controller 40, battery management system 20 carries out the detection of voltage by the control of on-off controller 40 and sends on-off controller 40 to by detecting the information of voltage obtained, the control port of on-off controller 40 is connected with the control signal input port of switch arrays 30, the inner side of discharge and recharge port 50 just, negative terminal, each cell just, negative pole is connected with the respective response end of switch arrays 30 respectively, the outside anode of discharge and recharge port 50 divides two-way, one tunnel is connected with the positive pole of charger 60 via the first K switch A, another road is connected with the positive pole of discharger 70 via second switch KB, the outside negative terminal of discharge and recharge port 50 and charger 60, the negative pole of discharger 70 connects.
In actual design, on-off controller 40 can be single-chip microcomputer, embedded controller or other computation processor.
In actual design, switch arrays 30 can comprise two-way contact normally opened relay, each cell is furnished with a two-way contact normally opened relay, wherein: for cell and for its arrange two-way contact normally opened relay for, the coil two ends of two-way contact normally opened relay respectively with the positive pole of power supply (not shown), the corresponding controling end of on-off controller 40 connects, the two ends of the first via normally opened contact of two-way contact normally opened relay respectively with the positive pole of cell, the inner side anode of discharge and recharge port 50 connects, the two ends of the second road normally opened contact respectively with the negative pole of cell, the inner side negative terminal of discharge and recharge port 50 connects.
Switch arrays 30 also can comprise multiselect one electronic switch, all cells in power battery pack 10 are divided into many groups, often organize correspondence and be equipped with two multiselect one electronic switches, each cell often in group and this two multiselect one electronic switches are connected, wherein: for each cell in every group and for for its two multiselect one electronic switches arranged, the control end of multiselect one electronic switch is connected with the corresponding controling end of Enable Pin with on-off controller 40, one input of one multiselect one electronic switch is connected with the positive pole of cell, and the negative pole of cell connects to a corresponding input of another multiselect one electronic switch, the output of multiselect one electronic switch be connected with the positive pole of cell is connected with the inner side anode of discharge and recharge port 50, the output of multiselect one electronic switch be connected with the negative pole of cell is connected with the inner side negative terminal of discharge and recharge port 50.
In the utility model, switch arrays 30 also can have other form of the composition, are not limited to above-mentioned.
In the utility model, power battery pack 10 comprises the multiple cells be connected in series.Battery management system 20 is the known systems of this area, and it can gather the voltage at each cell two ends in power battery pack 10, the total voltage of power battery pack 10 and electric current, and the concrete formation of battery management system 20 does not here describe in detail.Charger 60, discharger 70, discharge and recharge port 50 are the existing device of this area, therefore its concrete formation does not here describe in detail.
The balance charge/discharge process of the utility model charge/discharge balancing system comprises step:
1) battery management system 20 gathers the information of voltage of each cell in power battery pack 10, and sends information of voltage to on-off controller 40;
2) on-off controller 40 judges according to the information of voltage received, and is specially:
If the voltage deviation value of a cell is less than 0 and the absolute value of voltage deviation value is greater than Deviation Control threshold value, then this cell needs charging, goes to 3); If the voltage deviation value of a cell is greater than 0 and is greater than Deviation Control threshold value, then this cell needs electric discharge, goes to 4); Wherein: the voltage deviation value of cell equals the average that cell both end voltage value deducts each cell both end voltage value in power battery pack 10;
3) on-off controller 40 control switch array 30, this cell that needs are charged is communicated with discharge and recharge port 50 by switch arrays 30, controls the first K switch A simultaneously and closes, thus carry out equalizing charge to this cell;
4) on-off controller 40 control switch array 30, this cell that needs are discharged is communicated with discharge and recharge port 50 by switch arrays 30, controls second switch KB simultaneously and closes, thus carry out balanced discharge to this cell.
In actual applications, when there is the cell of multiple needs charging, the cell of charging can be needed to carry out equalizing charge to each one by one according to the order that the absolute value of voltage deviation value is descending, when there is the cell of multiple needs electric discharge, the order descending according to voltage deviation value needs the cell of electric discharge to carry out balanced discharge to each one by one.
When equalizing charge revert in normal interval (setting interval value) to the voltage deviation value of cell, on-off controller 40 is by control switch array 30, and this cell and discharge and recharge port 50 are disconnected, and charge balancing operation completes.And when reality is charged, when equalizing charge completes, the voltage of cell has certain falling, the absolute value of its voltage deviation value may be greater than Deviation Control threshold values again, can cause thus also will carrying out equalizing charge again to this cell, so, when charging to cell, enough charging intervals should be ensured, to guarantee equalizing charge effect.
When balanced discharge revert in normal interval to the voltage deviation value of cell, on-off controller 40 is by control switch array 30, and this cell and discharge and recharge port 50 are disconnected, and equalization discharge operation completes.And when actual discharge, when balanced discharge completes, the voltage of cell has certain falling, its voltage deviation value may be greater than Deviation Control threshold values again, can cause thus also will carrying out balanced discharge again to this cell, so, when discharging to cell, enough discharge times should be ensured, to guarantee balanced discharge effect.
Embodiment 1:
As shown in Figure 2, for being connected in series the power battery pack 10 formed by 8 cell 10a to 10h, the utility model charge/discharge balancing system designs as follows: single-chip microcomputer U0 selected by on-off controller 40, single-chip microcomputer U0 is connected with alarm lamp LED, and single-chip microcomputer U0 controls the lighting of alarm lamp LED, extinguishes.Switch arrays 30 are made up of 8 two-way contact normally opened relays, one end of the first via normally opened contact of each two-way contact normally opened relay connects the inner side anode that the positive pole of cell 10a to 10h and the other end connect discharge and recharge port 50 respectively, and one end of the second road normally opened contact of each two-way contact normally opened relay connects the inner side negative terminal that the negative pole of cell 10a to 10h and the other end connect discharge and recharge port 50 respectively.Annexation in fig. 2 between not shown battery management system 20 and cell and the annexation between first, second K switch A, KB and single-chip microcomputer U0.
Under normal circumstances, the pin 12-19 of single-chip microcomputer U0 exports high level, coil J1 to J8 all not conductings of two-way contact normally opened relay, two-way normally opened contact K1-1, K1-2, K2-1, K2-2 ..., K8-1, K8-2 be all in off-state, and the pin 11 of single-chip microcomputer U0 exports high level, alarm lamp LED is in OFF state.
Battery management system 20 detects the both end voltage of each cell 10a to 10h and information of voltage is passed to single-chip microcomputer U0, such as when single-chip microcomputer U0 detects that the voltage deviation value of cell 10a is less than 0 and absolute value is greater than Deviation Control threshold value, single-chip microcomputer U0 controls pin 11 output low level, light alarm lamp LED to report to the police, control pin 19 output low level simultaneously, the coil J1 of two-way contact normally opened relay obtains electric, its two-way normally opened contact K1-1, K1-2 close, and make the both positive and negative polarity of cell 10a and the inner side positive and negative terminal conducting of discharge and recharge port 50.Now control the first K switch A by single-chip microcomputer U0 to close, so cell 10a and charger 60 form charge circuit, cell 10a carries out equalizing charge.
In charging process, battery management system 20 gathers the voltage at cell 10a two ends, when the voltage rise at cell 10a two ends is to time consistent with other monomer battery voltage, battery management system 20 can inform single-chip microcomputer U0, so single-chip microcomputer U0 controls pin 19 become high level, coil J1 dead electricity, its two-way normally opened contact K1-1, K1-2 open, the both positive and negative polarity of cell 10a and the inner side positive and negative terminal of discharge and recharge port 50 disconnect, and stop charging, and single-chip microcomputer U0 controls alarm lamp LED extinguishing simultaneously.
Equally, when in power battery pack 10, the voltage deviation value of certain cell is greater than 0 and is greater than Deviation Control threshold value, by above-mentioned control procedure, this cell is communicated with discharge and recharge port 50, and it is closed to control second switch KB, thus form discharge loop between this cell and discharger 70, to carry out balanced discharge to this cell.
Embodiment 2:
For being connected in series the power battery pack 10 formed by 48 cell 10-1 to 10-48, the utility model charge/discharge balancing system designs as follows: single-chip microcomputer U1 selected by on-off controller 40, single-chip microcomputer U1 is connected with alarm lamp LED, and single-chip microcomputer U1 controls the lighting of alarm lamp LED, extinguishes.Switch arrays 30 select an electronic switch 30A to 30L to form by 12 eight, each eight select control end A, B, C of an electronic switch to be connected to the corresponding control pin of single-chip microcomputer U1 with Enable Pin EN, as Fig. 3, every 8 cell correspondences are provided with two eight and select an electronic switch.Select for an electronic switch for two eight of the corresponding arranging of each cell, illustrate for cell 10-1, eight select the input K1+ of an electronic switch 30A to be connected with the positive pole of cell 10-1, the negative pole and eight of cell 10-1 selects the input K1-of an electronic switch 30B to be connected, eight select the output OUT+ of an electronic switch 30A to be connected with the inner side anode of discharge and recharge port 50, and eight select the output OUT-of an electronic switch 30B to be connected with the inner side negative terminal of discharge and recharge port 50.Annexation in figure 3 between not shown battery management system 20 and cell and the annexation between first, second K switch A, KB and single-chip microcomputer U1.
Eight select an electronic switch to be 3-8 decoder, and when it is enabled, according to the address wire A of 3-8 decoder, the logic level of B, C, eight select in an electronic switch and only have a way switch conducting, and its truth table is as shown in table 1 below.
Table 1 eight selects an electronic switch truth table
| EN | A | B | C | Actuating switch |
| 1 | x | x | x | Not conductings |
| 0 | 0 | 0 | 0 | K1 conducting |
| 0 | 0 | 0 | 1 | K2 conducting |
| 0 | 0 | 1 | 0 | K3 conducting |
| 0 | 0 | 1 | 1 | K4 conducting |
| 0 | 1 | 0 | 0 | K5 conducting |
| 0 | 1 | 0 | 1 | K6 conducting |
| 0 | 1 | 1 | 0 | K7 conducting |
| 0 | 1 | 1 | 1 | K8 conducting |
Under normal circumstances, single-chip microcomputer U1 controls the Enable Pin EN input high level selecting an electronic switch 30A to 30L to 12 eight, 12 eight are made to select switch all not conductings in an electronic switch 30A to 30L, and pin 14 output low level of single-chip microcomputer U1, alarm lamp LED is in OFF state.
Battery management system 20 detects the both end voltage of each cell 10-1 to 10-48 and information of voltage is passed to single-chip microcomputer U1, such as when single-chip microcomputer U1 detects that the voltage deviation value of cell 10-1 is less than 0 and absolute value is greater than Deviation Control threshold value, single-chip microcomputer U1 controls pin 14 and exports high level, light alarm lamp LED, control pin 39,38,37,36 simultaneously and export low, low, low, low level respectively, eight are made to select the K1 switch of electronic switch 30A, a 30B to close, the positive and negative electrode of cell 10-1 and the inner side positive and negative terminal conducting of discharge and recharge port 50.Now control the first K switch A by single-chip microcomputer U1 to close, so cell 10-1 and charger 60 form charge circuit, cell 10-1 carries out equalizing charge.
In charging process, battery management system 20 gathers the voltage at cell 10-1 two ends, when the voltage rise at cell 10-1 two ends is to time consistent with other monomer battery voltage, battery management system 20 can inform single-chip microcomputer U1, so single-chip microcomputer U1 controls pin 36 become high level, the eight K1 switch opens selecting electronic switch 30A, a 30B, the both positive and negative polarity of cell 10-1 and the inner side positive and negative terminal of discharge and recharge port 50 disconnect, stop charging, single-chip microcomputer U1 controls alarm lamp LED extinguishing simultaneously.
Equally, when in power battery pack 10, the voltage deviation value of certain cell is greater than 0 and is greater than Deviation Control threshold value, by above-mentioned control procedure, this cell is communicated with discharge and recharge port 50, and it is closed to control second switch KB, thus form discharge loop between this cell and discharger 70, to carry out balanced discharge to this cell.
The internal energy of the utility model not consumption of power battery pack, also energy trasfer is there is not between cell, but cooperatively interacted by battery management system and on-off controller, realize needing balanced cell to carry out man-to-man balance charge/discharge in power battery pack by switch arrays, keep the state-of-charge (SOC) of power battery pack to maintain all the time in the reasonable scope, effectively extend the whole service life of power battery pack.
Balanced way of the present utility model has directive property and is easy to realize, be different from online balanced way, the utility model only plays a role when needs are balanced, energy ezpenditure is little, workable, improve the efficiency of balance charge/discharge, when especially charge or discharge needing for single cell, the reparation to cell can be realized when not taking battery case apart.
The above know-why being preferred embodiment of the present utility model and using; for a person skilled in the art; when not deviating from spirit and scope of the present utility model; any based on apparent changes such as the equivalent transformation on technical solutions of the utility model basis, simple replacements, all belong within the utility model protection range.
Claims (4)
1. a charge/discharge balancing system for power battery pack, is characterized in that: it comprises battery management system, on-off controller and switch arrays, discharge and recharge port, charger and discharger, wherein:
Battery management system gathers the information of voltage of each cell be connected in series in power battery pack and sends information of voltage to on-off controller;
On-off controller carrys out control switch array according to the information of voltage received, cell to be charged and to be discharged in power battery pack is communicated with discharge and recharge port via switch arrays one by one, wherein, the voltage deviation value of cell to be charged is less than 0 and absolute value is greater than Deviation Control threshold value, and the voltage deviation value of cell to be discharged is greater than 0 and is greater than Deviation Control threshold value;
Discharge and recharge port divides two-way, one tunnel is connected with charger, another road is connected with discharger, the circuit that discharge and recharge port is connected with charger is provided with the first switch, the circuit that discharge and recharge port is connected with discharger is provided with second switch, first switch and opening of second switch control by on-off controller with closed, wherein, when there is cell to be charged, first switch closes and makes cell to be charged via switch arrays, discharge and recharge port, first switch is communicated with charger, when there is cell to be discharged, second switch closes and makes cell to be discharged via switch arrays, discharge and recharge port, second switch is communicated with discharger.
2. charge/discharge balancing system as claimed in claim 1, is characterized in that:
Described on-off controller is single-chip microcomputer, embedded controller.
3. charge/discharge balancing system as claimed in claim 1 or 2, is characterized in that:
Described switch arrays comprise two-way contact normally opened relay, each described cell is furnished with a two-way contact normally opened relay, wherein: for cell and for its arrange two-way contact normally opened relay for, the coil two ends of two-way contact normally opened relay respectively with the positive pole of power supply, the corresponding controling end of described on-off controller connects, the two ends of the first via normally opened contact of two-way contact normally opened relay respectively with the positive pole of cell, the inner side anode of discharge and recharge port connects, the two ends of the second road normally opened contact respectively with the negative pole of cell, the inner side negative terminal of discharge and recharge port connects.
4. charge/discharge balancing system as claimed in claim 1 or 2, is characterized in that:
Described switch arrays comprise multiselect one electronic switch, all cells in described power battery pack are divided into many groups, often organize correspondence and be equipped with two multiselect one electronic switches, each cell often in group and this two multiselect one electronic switches are connected, wherein: for each cell in every group and for for its two multiselect one electronic switches arranged, the control end of multiselect one electronic switch is connected with the corresponding controling end of Enable Pin with described on-off controller, one input of one multiselect one electronic switch is connected with the positive pole of cell, and the negative pole of cell connects to a corresponding input of another multiselect one electronic switch, the output of multiselect one electronic switch be connected with the positive pole of cell is connected with the inner side anode of described discharge and recharge port, the output of multiselect one electronic switch be connected with the negative pole of cell is connected with the inner side negative terminal of described discharge and recharge port.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104967172A (en) * | 2015-07-07 | 2015-10-07 | 厦门乾芯能源科技有限公司 | Battery pack active balancing control system |
| CN105790339A (en) * | 2014-12-25 | 2016-07-20 | 北京有色金属研究总院 | Balanced charge-discharge system and balanced charge-discharge method of power battery pack |
| CN115276194A (en) * | 2022-09-30 | 2022-11-01 | 国联汽车动力电池研究院有限责任公司 | Power battery pack balance maintenance system and method |
-
2014
- 2014-12-25 CN CN201420842319.4U patent/CN204334038U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790339A (en) * | 2014-12-25 | 2016-07-20 | 北京有色金属研究总院 | Balanced charge-discharge system and balanced charge-discharge method of power battery pack |
| CN104967172A (en) * | 2015-07-07 | 2015-10-07 | 厦门乾芯能源科技有限公司 | Battery pack active balancing control system |
| CN115276194A (en) * | 2022-09-30 | 2022-11-01 | 国联汽车动力电池研究院有限责任公司 | Power battery pack balance maintenance system and method |
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Address after: 100088, 2, Xinjie street, Xicheng District, Beijing Patentee after: Youyan Technology Group Co.,Ltd. Address before: 100088, 2, Xinjie street, Xicheng District, Beijing Patentee before: GENERAL Research Institute FOR NONFERROUS METALS Address after: 100088, 2, Xinjie street, Xicheng District, Beijing Patentee after: China Youyan Technology Group Co.,Ltd. Address before: 100088, 2, Xinjie street, Xicheng District, Beijing Patentee before: Youyan Technology Group Co.,Ltd. |