CN110690748A - Wireless charging device for gradient utilization of power battery - Google Patents
Wireless charging device for gradient utilization of power battery Download PDFInfo
- Publication number
- CN110690748A CN110690748A CN201810639099.8A CN201810639099A CN110690748A CN 110690748 A CN110690748 A CN 110690748A CN 201810639099 A CN201810639099 A CN 201810639099A CN 110690748 A CN110690748 A CN 110690748A
- Authority
- CN
- China
- Prior art keywords
- voltage
- charging
- power battery
- reading
- electronic switch
- 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.)
- Pending
Links
- 238000005259 measurement Methods 0.000 claims description 21
- 238000007599 discharging Methods 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 10
- 230000006698 induction Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000032683 aging Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000007726 management method Methods 0.000 description 21
- 238000012360 testing method Methods 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Abstract
The invention relates to the field of rechargeable battery management and application, in particular to a wireless charging device for utilizing a power battery in echelon, which comprises an inverter, a wireless charging transmitting device and a battery management system, wherein the battery management system comprises a controllable charging module, a voltage measuring module and a microprocessor, the power battery utilized in echelon is respectively connected with the output end of the controllable charging module and the input end of the voltage measuring module, the input end of the controllable charging module is connected with commercial power, the control end of the controllable charging module and the output end of the voltage measuring module are both connected with the microprocessor, the power battery utilized in echelon is connected with the input end of the inverter, the output end of the inverter is connected with the wireless charging transmitting device, and the wireless charging transmitting device is. The substantial effects of the invention are as follows: the power battery that can echelon utilization electric automobile eliminates can carry out effectual protection and maintenance with low cost to power battery's capacity simultaneously, extension power battery remaining life.
Description
Technical Field
The invention relates to the field of rechargeable battery management and application, in particular to a wireless charging device for utilizing a power battery in a gradient manner.
Background
According to the related planning of new energy automobile development, the production capacity of pure electric vehicles and plug-in hybrid electric vehicles reaches 200 thousands of vehicles in 2020, the accumulated output and sales volume exceeds 500 thousands of vehicles, and the number of used power batteries is huge. The performance of a power battery of the electric automobile is attenuated along with the increase of the charging and discharging times, the power battery is retired when the capacity of the battery is attenuated to 80%, the power battery is not suitable for being used on the electric automobile any more, but the capacity is very high, and the residual capacity can be completely utilized in other industries in a gradient manner. The wireless charging technology is characterized in that the wireless charging technology is not connected to terminal equipment needing charging by a traditional wire, a magnetic field is generated between coils, and the inductive coupling is a bridge for connecting a power supply and an electric appliance, so that the trouble of the wire is eliminated, and the use of the electric appliance is greatly facilitated.
The power battery used on the electric automobile is usually a lithium battery pack, and the lithium battery pack is formed by connecting a plurality of battery cores in series. The full-charge voltage of a single battery cell is about 4.2V, and the discharge cut-off voltage is about 3.3V. A certain number of battery cores are connected in series to form a battery pack required by the electric automobile. Due to the fact that the control requirement of the battery cell on the charging voltage is high, if the charging voltage is higher than the standard charging voltage, overcharge can be caused, and the capacity of the battery cell is obviously reduced due to the overcharge. When a large number of cells are connected in series, the voltage distribution on different cells is different due to different internal resistances of the cells, and partial cells are overcharged. Therefore, the battery pack of the electric vehicle is usually equipped with a built-in battery management system to maintain the charge and discharge of the battery cell at a reasonable voltage level. However, as the battery cells age and the performance of the battery management system built in the battery pack is uneven, especially for the power batteries eliminated from the electric automobile, the battery management system built in the battery pack is not enough to be completely relied on.
The influence on the cell capacity is related to temperature, discharge current, charge current, overdischarge, and the like in addition to the charge cut-off voltage, but when a power battery is used to drive a wireless charge transmission device of small power, the main factor influencing the cell capacity becomes the charge cut-off voltage. The main factors influencing the cell charging voltage are the charging cutoff voltage of the battery pack and the unbalanced cell internal resistance. When a certain cell has higher internal resistance due to aging, the cell has the highest partial pressure and is most easily overcharged. If the battery cell is scrapped due to multiple overcharging, the whole battery can be scrapped. When the power battery is recycled and reused in an echelon manner, a large amount of capital and technology are difficult to invest, and the power battery is repaired or a battery management system is difficult to reinstall. Therefore, it is necessary to properly reduce the overall charging cut-off voltage of the battery pack so that the battery cell with higher internal resistance is not overcharged in the charging process. Although the capacity utilization rate of the whole battery pack is reduced, the effect of effectively prolonging the residual life of the battery pack can be achieved at lower cost.
Chinese patent CN 107150602 a, open 2017, 9/12/2017/BMS battery management system, the standard parameter value range of the battery pack is stored through a cloud server, a data processing module in the control device analyzes the received current temperature, current, humidity and vibration frequency data, and then displays the analysis structure on a display screen in a graph form, and at the same time, displays the current remaining power and used power of the battery pack on the display screen through a power display module, and sends the analysis structure to a mobile terminal, a battery APP in the mobile terminal receives the analysis structure in real time or at regular time, and compares the analysis structure with the standard value range received from the cloud server, and sends a regulation and control instruction according to the analysis structure, the data processing module receives the regulation and control instruction again and sends the regulation and control instruction to a power control module, and the power control module controls a heat dissipation device and a dehumidification device in a cooling system to dissipate heat or remove heat according to the received regulation and control instruction And (5) wetting. The device is complex and is not suitable for the management of the power battery recycled in a gradient way.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the power battery management system for recycling the echelon utilization in the prior art is too complex and lacks the technical problem of echelon utilization of the power battery. A wireless charging device for a gradient-utilization power battery is provided, which is simple, feasible and low in cost, and can perform gradient utilization of the power battery and perform capacity protection.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a echelon utilizes wireless charging device of power battery, includes dc-to-ac converter, wireless emitter and the battery management system that charges, the battery management system includes controllable module, voltage measurement module and the microprocessor of charging, and the power battery that is utilized by echelon is connected with controllable module output and voltage measurement module input respectively, and controllable module input and the commercial power connection of charging, controllable module control end and the voltage measurement module output of charging all are connected with microprocessor, are connected with the dc-to-ac converter input by the power battery that echelon utilized, the dc-to-ac converter output is connected with wireless emitter that charges, and wireless emitter that charges receives microprocessor control. The controllable charging module is controllable in charging current and voltage, the battery management system is used for managing the electric quantity of the power battery, the electric quantity management comprises charging and discharging management and capacity maintaining management, the battery management system is used for prolonging the residual life of the power battery which is utilized in a gradient mode, and the comprehensive utilization rate of the power battery is increased.
Preferably, the battery management system further comprises a first controllable electronic switch, a second controllable electronic switch and a coulometer, wherein the first controllable electronic switch is connected between the power battery used by the echelon and the input end of the inverter in series, the first end of the second controllable electronic switch is connected with the power battery used by the echelon, the second end of the second controllable electronic switch is connected with the input end of the coulometer, the output end of the coulometer is connected with the input end of the inverter, the reading end of the coulometer is connected with the microprocessor, and the control ends of the first controllable electronic switch and the second controllable electronic switch are both connected with the microprocessor. The power battery can be connected into or separated from the coulometer through the first controllable electronic switch and the second controllable electronic switch, when the capacity statistics needs to be carried out, the first controllable electronic switch is switched off, the second controllable electronic switch is switched on, the coulometer is connected into the coulometer to carry out statistics on the electric quantity, the coulometer can be switched off when the second controllable electronic switch is switched off, the coulometer can be used as required, and the service life of the coulometer is prolonged.
Preferably, the wireless charging and transmitting device further comprises a plurality of transformer modules, and proper transformer modules are selected manually to be connected between the inverter and the wireless charging and transmitting device, so that the voltages input to the input end of the wireless charging and transmitting device after passing through the transformer modules are equivalent after the power batteries with different rated voltages are connected. Because the rated voltages of the power batteries of the electric automobile are different, the power batteries with different rated voltages can be suitable by using the plurality of transformer modules, and the range of the power batteries which can be used by the wireless charging device is widened.
Preferably, the wireless charging receiving and detecting device further comprises a wireless charging receiving and detecting device, the wireless charging receiving and detecting device comprises a shell, an induction coil, a wireless charging communication module and an indicator lamp, the induction coil and the wireless charging communication module are both installed in the shell, the indicator lamp is installed on the shell, the induction coil is connected with the indicator lamp in series, and when the wireless charging receiving and detecting device is placed on the wireless charging transmitting device, the wireless charging communication module is communicated with the wireless charging transmitting device and triggers wireless charging power transmission. After the power battery is newly connected, the performance of the power battery is not known, so that the wireless charging receiving and detecting device is required to be used for detecting firstly, the electronic equipment with wireless charging is charged after the wireless charging receiving and detecting device is detected to be qualified, the electronic equipment can be protected, and meanwhile, the fault of the wireless charging transmitting device can be checked.
Preferably, the battery management system operates according to the following process:
A1) the method comprises the steps that when the device is started for the first time, the microprocessor controls the first controllable electronic switch and the second controllable electronic switch to be switched off, the microprocessor reads a reading of a voltage measurement module, if the reading is positive, the power battery which is utilized in a gradient manner is judged to be correctly switched on, meanwhile, the rated voltage of the power battery which is utilized in a gradient manner is judged according to the reading of the voltage measurement module, the standard charging cut-off voltage Vc and the discharging cut-off voltage Ve are obtained according to the rated voltage, the charging voltage Vg of the power battery is set to Vc, A2) after the setting time t0 is waited, the reading of the voltage measurement module is read again and recorded as V1, the microprocessor controls the second controllable electronic switch to be switched on, the power battery which is utilized in a gradient manner is switched on through a coulomb meter and an inverter, the wireless charging transmission device is switched off after the working setting time t1, the microprocessor controls the second controllable electronic switch to be switched off, after the setting time t0, the reading of the voltage measurement module is read and recorded as V2 and the reading of the coulomb meter and recorded as a reading of the coulomb 72 and the coulomb meter 72, the reading of the coulomb meter after the reading of the coulomb meter, the reading of the coulomb meter is read the meter, the coulomb meter, the reading of the coulomb meter is not the coulomb meter, the coulomb meter after the reading of the reading the battery cell is set a meter is set a wireless charging power battery cell is set up, the wireless charging power battery cell is not applicable to be the battery cell is set up, the wireless charging power battery cell, the wireless charging device, the wireless charging power battery cell is set for the wireless charging power battery cell, the wireless charging device, the wireless charging power battery cell is set for the wireless charging and the wireless charging device, the cell is set for the cell, the cell is set for the wireless charging and the cell, the cell is set for the cell, the cell is set for the cell, the cell is not applicable to be the cell, the cell is set point of the cell, the cell is not applicable to be the cell is set for the cell, the cell is set for the cell, the wireless charging device, the cell is not applicable to be the cell, the cell is set for the cell, the cell is set for the cell, the cell is not applicable to be the cell, the cell is not applicable to be the cell, the cell is not applicable to be the cell is not applicable to be the cell, the cell is not to be the cell, the cell is not applicable to be the cell, the cell of the cell, the cell is set for the cell, the cell is not applicable to be the cell, the cell is not applicable to be the cell, the cell is not applicable to be the cell, the cell is not applicable to be the cell, the cell is not applicable to be the cell.
Preferably, B1) calculates the number k of cells connected in series with the power battery from the rated voltage of the power battery, a relation curve W (Vc/k, m) between the capacity of the introduced cells when the voltage Vc/k is used as the cut-off charging voltage and the number m of charging and discharging times, a relation curve W (Vc1/k, m) ~ W (Vcn/k, m) between the capacity of the introduced cells when the voltage Vc1/k ~ Vcn/k is used as the cut-off charging voltage and the number m of charging and discharging times, wherein Vc, Vc1 ~ Vcn are in an equal difference series, B2) lists formula I (k-1) W (Vc/k, m) + W (Vci/k, m + n1) + W (Vci/k, m + n1) = W1' ∈ + wherein I is a positive integer to be solved, I ∈ [1, n ], m ∈ [ epsilon ], n is a positive real number, I and when the voltage Vc/k is used as the maximum protection value of the battery pack, the maximum protection effect of the battery can be obtained by calculating the maximum of the battery pack.
The substantial effects of the invention are as follows: the power battery that can echelon utilization electric automobile eliminates can carry out effectual protection and maintenance with low cost to power battery's capacity simultaneously, extension power battery remaining life.
Drawings
Fig. 1 is a block diagram of a wireless charging device.
Fig. 2 is a block diagram of a battery management system workflow.
FIG. 3 is an exemplary voltage versus remaining capacity curve.
Fig. 4 is a graph showing the relationship between the capacity and the number m of charge and discharge times at different charge cut-off voltages.
Wherein: 1. the wireless charging system comprises electronic equipment with wireless charging, a battery management system, a microprocessor, a voltage measuring module, a controllable charging module, a voltage measuring module, a commercial power measuring module, a voltage measuring module, a wireless charging receiving and testing device, a wireless charging transmitting device, an inverter, a coulometer, a.
Detailed Description
The following provides a more detailed description of the present invention, with reference to the accompanying drawings.
As shown in fig. 1, as a structure diagram of a wireless charging device, a battery management system 2 includes a controllable charging module 5, a voltage measuring module 4, a microprocessor 3, a first controllable electronic switch 11, a second controllable electronic switch 12 and a coulometer 10, a power battery 13 utilized by echelon is respectively connected with an output end of the controllable charging module 5 and an input end of the voltage measuring module 4, an input end of the controllable charging module 5 is connected with a commercial power, a control end of the controllable charging module 5 and an output end of the voltage measuring module 4 are both connected with the microprocessor 3, the power battery 13 utilized by echelon is connected with an input end of an inverter 9, an output end of the inverter 9 is connected with a wireless charging emitter 8, the wireless charging emitter 8 is controlled by the microprocessor 3, the first controllable electronic switch 11 is connected in series between the power battery 13 utilized by echelon and the input end of the inverter 9, a first end of the second controllable electronic switch 12 is connected with the power battery, the second end of the second controllable electronic switch 13 is connected with the input end of the coulometer 10, the output end of the coulometer 10 is connected with the input end of the inverter 9, the reading end of the coulometer 10 is connected with the microprocessor 3, and the control ends of the first controllable electronic switch 11 and the second controllable electronic switch 12 are both connected with the microprocessor 3. And the plurality of transformer modules are manually selected to be connected between the inverter 9 and the wireless charging transmitting device 8, so that the voltages input to the input end of the wireless charging transmitting device 8 after passing through the transformer modules are equivalent after the power batteries 13 with different rated voltages are connected. Wireless charging receiving and detecting device 7 includes the shell, induction coil, wireless communication module and the pilot lamp of charging, and induction coil and wireless communication module of charging all install in the shell, and the pilot lamp is installed on the shell, and induction coil establishes ties with the pilot lamp, and when wireless receiving and detecting device 7 of charging placed on wireless emitter 8 of charging, wireless communication module of charging and wireless emitter 8 communication of charging and triggering wireless charging power transmission.
As shown in fig. 2, which is a working flow diagram of a battery management system, a1) when the device is started for the first time, the microprocessor 3 controls the first controllable electronic switch 11 and the second controllable electronic switch 12 to be off, the microprocessor 3 reads readings of the voltage measurement module 4, if the readings are positive, the power battery 13 which is used in a gradient manner is judged to be correctly connected, meanwhile, rated voltage of the power battery 13 which is used in a gradient manner is judged according to the readings of the voltage measurement module 4, standard charging cut-off voltage Vc and discharging cut-off voltage Ve are obtained according to the rated voltage, charging voltage Vg of the power battery 13 is set to be Vc, a2) after waiting for set time t0, the readings of the voltage measurement module 4 are read again and recorded as V1, the microprocessor 3 controls the second controllable electronic switch 12 to be connected, the power battery 13 which is used in a gradient manner is connected with an inverter 9 through a coulomb meter 10, the microprocessor 3 controls the wireless charging transmission device 8 to work for set time t1, the wireless charging transmission device 8 is closed, the wireless charging transmission device 8, the microprocessor 3 controls the second controllable electronic switch 12 to be disconnected, after waiting for a power battery 12 to be connected, a power battery power meter t 598, a power meter is read, a power meter is set by a 3613, a1, a constant-charging power meter is set by a1, a constant-charging power meter is set voltage meter is set for a constant-charging time t-charging time curve which is set for a constant-charging meter, a constant-charging time curve is set for charging meter 1, a constant-charging meter is set for a constant-charging meter, a constant-charging meter 1, a constant-charging meter is set for a constant-charging meter is set by a constant-charging meter 1, a constant-power meter 1, a constant-charging meter 1, a constant-power transmission, a constant-power battery charging meter 1, a constant-power battery charging meter is set for a constant-charging meter 1, a constant-charging meter is set for a constant-power battery charging meter for a constant-charging power battery charging meter for a constant-charging meter 3613, a constant-charging meter for a constant-charging meter is set point power battery charging meter for a constant-charging meter for a constant-charging meter for a constant-charging time interval, a constant-charging meter for power transmission device, a constant-charging time interval, a constant-.
As shown in fig. 3, as an exemplary voltage-to-remaining capacity relationship curve, the voltage-to-remaining capacity relationship curve may be obtained by public data query or may be obtained through a test, where the test method includes obtaining a target cell, fully charging the cell in a constant-current-first and then constant-voltage manner at a standard charge cut-off voltage, then connecting the cell in series with a coulometer, discharging at a rate of 0.1C for a short time △ t, measuring an open-circuit voltage of the cell after a rest time t1 as V1, and measuring a coulometer reading as Q1, then discharging again at a rate of 0.1C for a short time △ t, measuring an open-circuit voltage of the cell after a rest time t1 as V2 and a coulometer reading as Q2, repeating the process until the open-circuit voltage of the cell is 3.0V, obtaining V1 ~ n and corresponding Q1 ~ Qn, labeling V1 ~ Vn on a vertical coordinate, and performing interpolation on a corresponding vertical coordinate of a ratio of Q1 ~ Qn corresponding to the V1 ~ Qn, and obtaining a corresponding percentage of a corresponding voltage input curve, and performing interpolation operation on a horizontal coordinate.
As shown in fig. 4, a relationship curve of capacity at different charge cut-off voltages and charge and discharge times m is obtained by public data query, or is obtained by experiments, the experiment method is that a voltage Vi is used as a charge cut-off voltage, Vi takes a value from V1 ~ Vn, wherein V1 ~ Vn can be selected from 4.0V, 4.05V, 4.1V, 4.15V, 4.2V, 4.25V, 4.3V, 4.35V and 4.4V, or a sequence of sub-numbers thereof, the sequence of sub-numbers is recommended to be an equal difference sequence, the sequence of sub-numbers includes three test values of 4.2V, 4.3V and 4.4V, after the test cell is fully charged by a constant current and then a constant voltage, the test cell is discharged to 3V at a discharge rate of 0.5C, a coulometer is used for measuring a discharge capacity Q1 during the discharge process, then the discharge rate of the test cell is fully charged, then the discharge rate of 0.5C is used for a discharge time, a discharge rate of the cell is repeatedly calculated by a coulometer Q1, and a discharge rate Q54, and a Q discharge rate of the discharge rate is calculated under the test cell 1 ~, and the charge and the discharge rate is obtained by a repeated charge and a Q curve of the test voltage.
B1) calculating the number k of the series-connected cells of the power battery according to the rated voltage of the power battery, introducing a relation curve W (Vc/k, m) of the capacity of the cells when the voltage Vc/k is used as a cut-off charging voltage and the number m of charging and discharging times, introducing a relation curve W (Vc1/k, m) ~ W (Vcn/k, m) of the cells when the voltage Vc1/k ~ Vcn/k is respectively used as the cut-off charging voltage, wherein Vc and Vc1 ~ Vcn are in an equal difference number sequence, B2 listing a formula I (k-1) W (Vc/k, m) + W (Vci/k, m) = W1, and a formula II (k-1) W (Vc/k, m + n1) + W (Vci/k, m + n1) = W1 epsilon + epsilon' =, wherein I is a positive integer to be solved, I belongs to [ epsilon 1, n epsilon, n = Vci, and the maximum value Vci and Vci = epsilon, Vci, Vc, and Vc = epsilon + n, and the maximum value is obtained when the real value is solved.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (8)
1. A wireless charging device for utilizing a power battery in a echelon manner is characterized in that,
including dc-to-ac converter, wireless emitter and the battery management system that charges, the battery management system includes controllable module, voltage measurement module and the microprocessor of charging, and the power battery who is utilized by the echelon is connected with controllable module output and voltage measurement module input of charging respectively, and controllable module input and the mains connection of charging, controllable module control end and the voltage measurement module output of charging all are connected with microprocessor, and the power battery who is utilized by the echelon is connected with the dc-to-ac converter input, the dc-to-ac converter output is connected with wireless emitter that charges, and wireless emitter that charges receives microprocessor control.
2. The wireless charging device for power batteries in echelon according to claim 1,
the battery management system further comprises a first controllable electronic switch, a second controllable electronic switch and a coulometer, wherein the first controllable electronic switch is connected between the power battery used by echelon and the input end of the inverter in series, the first end of the second controllable electronic switch is connected with the power battery used by echelon, the second end of the second controllable electronic switch is connected with the input end of the coulometer, the output end of the coulometer is connected with the input end of the inverter, the reading end of the coulometer is connected with the microprocessor, and the control ends of the first controllable electronic switch and the second controllable electronic switch are both connected with the microprocessor.
3. The wireless charging device for power batteries in echelon according to claim 2,
the wireless charging and transmitting device is characterized by also comprising a plurality of transformer modules, wherein proper transformer modules are manually selected to be connected between the inverter and the wireless charging and transmitting device, so that the voltages input to the input end of the wireless charging and transmitting device are equivalent after the power batteries with different rated voltages are connected through the transformer modules.
4. The wireless charging device for power battery in echelon according to claim 2 or 3,
still include wireless receiving detection device that charges, wireless receiving detection device that charges includes shell, induction coil, wireless communication module and the pilot lamp that charges, induction coil and wireless communication module that charges all install in the shell, the pilot lamp is installed on the shell, induction coil and pilot lamp establish ties, when wireless receiving detection device that charges places on wireless emitter that charges, wireless communication module that charges communicates with wireless emitter that charges and triggers wireless charging power transmission.
5. The wireless charging device for power battery in echelon according to claim 2 or 3,
the battery management system works according to the following procedures:
A1) when the device is started for the first time, the microprocessor controls the first controllable electronic switch and the second controllable electronic switch to be switched off, the microprocessor reads the reading of the voltage measurement module, if the reading is a positive value, the power battery used for the echelon is judged to be correctly switched in, meanwhile, the rated voltage of the power battery used for the echelon is judged according to the reading of the voltage measurement module, the standard charging cut-off voltage Vc and the standard discharging cut-off voltage Ve are obtained according to the rated voltage, and the charging voltage Vg of the power battery is set to be Vc;
A2) after waiting for a set time t0, reading the reading of the voltage measurement module again and recording the reading as V1, controlling the second controllable electronic switch to be switched on by the microprocessor, switching on the power battery utilized in a echelon through a coulometer and an inverter, controlling the wireless charging transmitting device to work by the microprocessor for a set time t1, switching off the wireless charging transmitting device, controlling the second controllable electronic switch to be switched off by the microprocessor, after waiting for a set time t0, reading the reading of the voltage measurement module and recording the reading as V2 and the reading of the coulometer as Q1, resetting the reading of the coulometer, controlling the first controllable electronic switch and the second controllable electronic switch to be switched off, and calculating the power battery capacity W1 according to a relation curve between the open-circuit voltage and the residual capacity of a new battery core;
A3) the microprocessor controls the controllable charging module to charge the power battery with the constant voltage Vc until the charging current i is smaller than a set value, then the wireless charging transmitting device is switched on to discharge the power battery, the discharging duration time t2 is reached, and the step is repeated for n1 times;
A4) the microprocessor controls the controllable charging module to charge the power battery by charging voltage Vc until charging current i is smaller than a set value, then the wireless charging transmitting device is switched on to discharge the power battery so that the difference value between the voltage of the power battery and the voltage V1 is smaller than a set threshold value V ', after the set time t0 is waited, the reading of the voltage measuring module is read again and recorded as V1', the microprocessor controls the second controllable electronic switch to be switched on, the power battery used for echelon use is switched on through a coulometer and an inverter, the microprocessor controls the wireless charging transmitting device to work for the set time t1 and then switches off the wireless charging transmitting device, the microprocessor controls the second controllable electronic switch to be switched off, after the set time t0 is waited, the reading of the voltage measuring module is read and recorded as V2 'and the reading of the coulometer and recorded as Q1', the reading is cleared, and then the first controllable electronic switch and the second controllable electronic switch are, calculating to obtain the power battery capacity W1' according to the relation curve of the open-circuit voltage and the residual capacity of the new battery core;
A5) comparing W1 with W1', if the difference value exceeds a set threshold △ W, calculating a proper charging voltage Vg through a battery cell overcharge aging curve model;
A6) and (3) taking the charging voltage Vg obtained in the step A5 as a charging cut-off voltage, fully charging the power battery in a constant-current-first and constant-voltage-second mode in a time period when the mains supply is at the valley power, controlling the power battery to supply power to the wireless charging transmitting device and the microprocessor in a time period when the mains supply is at the peak power until the voltage of the power battery is reduced to a discharging cut-off voltage Ve or the time period at the peak power is over, and repeating the step A6.
6. The wireless charging device for power batteries in echelon according to claim 4,
the battery management system works according to the following procedures:
A1) when the device is started for the first time, the microprocessor controls the first controllable electronic switch and the second controllable electronic switch to be switched off, the microprocessor reads the reading of the voltage measurement module, if the reading is a positive value, the power battery used for the echelon is judged to be correctly switched in, meanwhile, the rated voltage of the power battery used for the echelon is judged according to the reading of the voltage measurement module, the standard charging cut-off voltage Vc and the standard discharging cut-off voltage Ve are obtained according to the rated voltage, and the charging voltage Vg of the power battery is set to be Vc;
A2) after waiting for a set time t0, reading the reading of the voltage measurement module again and recording the reading as V1, controlling a second controllable electronic switch to be switched on by a microprocessor, switching on the power battery utilized in a echelon through a coulometer and an inverter, controlling a wireless charging emission device to work by the microprocessor for a set time t1, switching off the wireless charging emission device, controlling the second controllable electronic switch to be switched off by the microprocessor, after waiting for a set time t0, reading the reading of the voltage measurement module and recording the reading as V2 and the reading of the coulometer and recording the reading as Q1, resetting the reading of the coulometer, and then controlling the first controllable electronic switch and the second controllable electronic switch to be switched off to calculate the capacity W1 of the power battery;
A3) the microprocessor controls the controllable charging module to charge the power battery with the constant voltage Vc until the charging current i is smaller than a set value, then the wireless charging transmitting device is switched on to discharge the power battery, the discharging duration time t2 is reached, and the step is repeated for n1 times;
A4) the microprocessor controls the controllable charging module to charge the power battery by charging voltage Vc until charging current i is smaller than a set value, then the wireless charging transmitting device is switched on to discharge the power battery so that the difference value between the voltage of the power battery and the voltage V2 is smaller than a set threshold value V ', after the set time t0 is waited, the reading of the voltage measuring module is read again and recorded as V1', the microprocessor controls the second controllable electronic switch to be switched on, the power battery used for echelon use is switched on through a coulometer and an inverter, the microprocessor controls the wireless charging transmitting device to work for the set time t1 and then switches off the wireless charging transmitting device, the microprocessor controls the second controllable electronic switch to be switched off, after the set time t0 is waited, the reading of the voltage measuring module is read and recorded as V2 'and the reading of the coulometer and recorded as Q1', the reading is cleared, and then the first controllable electronic switch and the second controllable electronic switch are, calculating to obtain the power battery capacity W1';
A5) comparing W1 with W1', if the difference value exceeds a set threshold △ W, calculating a proper charging voltage Vg through a battery cell overcharge aging curve model;
A6) and (3) taking the charging voltage Vg obtained in the step A5 as a charging cut-off voltage, fully charging the power battery in a constant-current-first and constant-voltage-second mode in a time period when the mains supply is at the valley power, controlling the power battery to supply power to the wireless charging transmitting device and the microprocessor in a time period when the mains supply is at the peak power until the voltage of the power battery is reduced to a discharging cut-off voltage Ve or the time period at the peak power is over, and repeating the step A6.
7. The wireless charging device for power batteries in echelon according to claim 5,
the step of calculating the appropriate charging voltage Vg comprises:
B1) calculating the number k of the power battery series-connected battery cores according to the rated voltage of the power battery, introducing a relation curve W (Vc/k, m) between the capacity of the battery cores and the charging and discharging times m when the voltage Vc/k is taken as a cut-off charging voltage, and introducing a relation curve W (Vc1/k, m) ~ W (Vcn/k, m) between the capacity of the battery cores and the charging and discharging times m when the voltage Vc1/k ~ Vcn/k is taken as a cut-off charging voltage respectively, wherein Vc and Vc1 ~ Vcn are in an equal difference series;
B2) formula I (k-1) W (Vc/k, m) + W (Vci/k, m) = W1,
formula II: (k-1) W (Vc/k, m + n1) + W (Vci/k, m + n1) = W1' + ε,
wherein I is a positive integer to be solved, I belongs to [1, n ], epsilon is a positive real number, the value of I when epsilon is minimum is solved by a united type I and a formula II to obtain Vci, and Vg = Vc/Vci.
8. The wireless charging device for power batteries in echelon according to claim 6,
the step of calculating the appropriate charging voltage Vg comprises:
B1) calculating the number k of the power battery series-connected battery cores according to the rated voltage of the power battery, introducing a relation curve W (Vc/k, m) between the capacity of the battery cores and the charging and discharging times m when the voltage Vc/k is taken as a cut-off charging voltage, and introducing a relation curve W (Vc1/k, m) ~ W (Vcn/k, m) between the capacity of the battery cores and the charging and discharging times m when the voltage Vc1/k ~ Vcn/k is taken as a cut-off charging voltage respectively, wherein Vc and Vc1 ~ Vcn are in an equal difference series;
B2) formula I (k-1) W (Vc/k, m) + W (Vci/k, m) = W1,
formula II: (k-1) W (Vc/k, m + n1) + W (Vci/k, m + n1) = W1' + ε,
wherein I is a positive integer to be solved, I belongs to [1, n ], epsilon is a positive real number, the value of I when epsilon is minimum is solved by a united type I and a formula II to obtain Vci, and Vg = Vc/Vci.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810639099.8A CN110690748A (en) | 2018-06-20 | 2018-06-20 | Wireless charging device for gradient utilization of power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810639099.8A CN110690748A (en) | 2018-06-20 | 2018-06-20 | Wireless charging device for gradient utilization of power battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110690748A true CN110690748A (en) | 2020-01-14 |
Family
ID=69106868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810639099.8A Pending CN110690748A (en) | 2018-06-20 | 2018-06-20 | Wireless charging device for gradient utilization of power battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110690748A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283239A (en) * | 2013-07-01 | 2015-01-14 | 比亚迪股份有限公司 | On-automobile wireless charging system for mobile terminal |
| US20150340885A1 (en) * | 2014-05-20 | 2015-11-26 | Samsung Sdi Co., Ltd. | Battery charging method and battery management system therefor |
| CN105743111A (en) * | 2016-03-29 | 2016-07-06 | 荆门市格林美新材料有限公司 | Energy storage system of power battery for echelon utilization vehicle |
| CN107221721A (en) * | 2017-05-19 | 2017-09-29 | 江苏大学 | A kind of single battery safe charging blanking voltage confining method for considering batteries in parallel connection difference |
| CN108140906A (en) * | 2015-12-31 | 2018-06-08 | 深圳市大疆创新科技有限公司 | Intelligent battery and method |
-
2018
- 2018-06-20 CN CN201810639099.8A patent/CN110690748A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283239A (en) * | 2013-07-01 | 2015-01-14 | 比亚迪股份有限公司 | On-automobile wireless charging system for mobile terminal |
| US20150340885A1 (en) * | 2014-05-20 | 2015-11-26 | Samsung Sdi Co., Ltd. | Battery charging method and battery management system therefor |
| CN108140906A (en) * | 2015-12-31 | 2018-06-08 | 深圳市大疆创新科技有限公司 | Intelligent battery and method |
| CN105743111A (en) * | 2016-03-29 | 2016-07-06 | 荆门市格林美新材料有限公司 | Energy storage system of power battery for echelon utilization vehicle |
| CN107221721A (en) * | 2017-05-19 | 2017-09-29 | 江苏大学 | A kind of single battery safe charging blanking voltage confining method for considering batteries in parallel connection difference |
Non-Patent Citations (2)
| Title |
|---|
| 和详运 等: "充电截止电压对镍钴锰动力电池寿命的影响", 电池, vol. 45, no. 2, 30 April 2015 (2015-04-30), pages 103 - 105 * |
| 王丽梅: "磷酸铁锂电池组安全保护技术研究", 中国博士学位论文全文数据库, 10 April 2015 (2015-04-10), pages 45 - 48 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Omariba et al. | Review of battery cell balancing methodologies for optimizing battery pack performance in electric vehicles | |
| CN103715737B (en) | A kind of charging and discharging lithium battery management system | |
| CN108790893B (en) | Alternating current charging pile and charging control method | |
| CN101882699B (en) | Charge and discharge balancing control method for power battery pack | |
| US8742723B2 (en) | Battery pack assembled with recycled batteries and method of assembly | |
| EP2816702B1 (en) | Battery management method and apparatus and battery powered device | |
| CN202696179U (en) | Battery management system | |
| CN114389336A (en) | Dynamic management and control system of lithium battery energy storage system | |
| CN107020251A (en) | The screening technique of battery and battery pack | |
| CN113300436A (en) | Dynamic management and control method for lithium battery energy storage system | |
| US20120161709A1 (en) | Secondary-battery control apparatus | |
| CN107290668A (en) | The screening method for group matching that a kind of batteries of electric automobile echelon is utilized | |
| CN103633695A (en) | Improved lithium battery pack equalizing method and equalizing circuit thereof | |
| CN106451592A (en) | Battery charging and discharging control method, battery charging and discharging control device and electric car | |
| US20220163591A1 (en) | Battery management apparatus, battery management method, and battery energy storage system | |
| CN108702005B (en) | Storage battery pack online equalization method and system thereof | |
| CN104821623B (en) | Battery charger | |
| CN103217651A (en) | Method and system for estimating charge state of storage battery | |
| CN113300437A (en) | Dynamic management and control system of lithium battery energy storage system | |
| CN109921103B (en) | Maintenance method and system for storage battery pack and maintenance method and system for storage battery | |
| CN108110867B (en) | Battery old utilization system | |
| CN107192965A (en) | A kind of dc source aging testing system and its method | |
| JP3683753B2 (en) | Secondary battery automatic test method | |
| CN209592234U (en) | A kind of cell equalization compensation device | |
| CN110690748A (en) | Wireless charging device for gradient utilization of power battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |