CN102544609A - Charge control method and system - Google Patents
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Abstract
The invention discloses a charge control method and a charge control system. The charge control method comprises the following steps of: measuring the temperature and ambient temperature of a single battery/each group of batteries in real time in the charging process; comparing the temperature and ambient temperature of the single battery/each group of batteries with a preset temperature threshold value, and determining charging parameters for charging in the next stage; and controlling the charging of the single battery/each group of batteries according to the determined charging parameters. According to the charge control method and the charge control system, the temperature of the single battery/each group of batteries is monitored in real time in the charging process, the charging parameters in each charging stage are determined according to the temperature change of the batteries, and the charging of the single battery/each group of batteries is controlled according to the charging parameters. Therefore, the damage to the batteries due to overhigh charging temperature is avoided while the batteries are charged completely, so that the batteries are protected, and the service life of the batteries is prolonged.
Description
Technical field
The present invention relates to a kind of mobile communication power supply field, relate in particular to a kind of charge control method and system.
Background technology
Lithium ion battery because operating voltage is high, volume is little, light weight, memory-less effect, pollution-free, self discharge is little, have extended cycle life, and is a kind of ideal source.In actual use, in order to obtain higher discharge voltage, generally at least two monomer lithium ion batteries are composed in series the use of lithium ion battery group.In the prior art, the lithium ion battery group charged can exist following problem.
Because battery in process of production, begins will pass through a lot of procedures to becoming finished product from filming.Even through strict trace routine, make every group of power source voltage, resistance, capacity unanimity, but use a period of time, the internal resistance of cell and voltage produce fluctuation, produce difference.After producing difference, adopt the mode of global voltage control to be difficult to be applicable to lithium dynamical battery.
For example the battery pile of a 36V is connected with 10 batteries.Whole charging control voltage is 42V, and discharge control voltage is 26V.Mode with global voltage control discharge is discharged, if during 10 battery discharges, wherein the voltage of two batteries is at 2.8V, and the voltage of four batteries is 3.2V, four 3.4V just, and present global voltage is 32V, lets it continue the discharge 26V that always works.Like this, the voltage of the battery of two 2.8V can be lower than 2.6V and be in the state of putting, and lithium battery is crossed several times and put and will scrap.Otherwise, charge with the mode of global voltage control charging, as charging with above-mentioned 10 batteries voltage status at that time.When global voltage reached 42V, the battery of those two 2.8V was in hungry state, and absorbs electric weight rapidly, will surpass 4.2V, and the battery that surpasses 4.2V that overcharges is not only scrapped owing to overtension produces, even also can causing danger property.
In addition; Though some battery management system has equalization function; But owing to consider from cost, heat radiation, reliability etc. are many-sided, the euqalizing current of battery management system is generally much smaller than the electric current of serial connection charge, so portfolio effect is not clearly; The situation that some cell is not fully filled electricity also can occur, this is then more obvious for the lithium ion battery group that needs large current charge.
General battery charge mode can be divided into: constant-voltage charge method, constant-current charge method, decide voltage switching constant-current charge method, pulse charging method, Reflex mise-a-la-masse method; And can be different according to the battery variety characteristic, select suitable charging modes for use.Because the battery that uses of this research is lithium battery, though the Reflex charge efficiency is higher, can influence the lithium battery life-span, and Reflex mise-a-la-masse method and its control circuit of pulse charging method complicacy, influenced by extraneous factor; The terminal voltage of constant-voltage charge method charging initial stage because of charger setting voltage and battery differs too big, and the charging initial stage can cause charging current excessive, and its charging interval is longer; Constant-current charge method charge efficiency is high, but the charging later stage causes the over-charge of lithium battery film to ring battery life, the charge controller accurately of must arranging in pairs or groups easily.
Adopt the mode of battery management system and charger cooperation serial connection charge, also can't solve the problem that some battery in the battery pack is not fully filled electricity, particularly many, battery consistency is poor, charging current is than greatly the time when battery pack string number.
Summary of the invention
The objective of the invention is to, a kind of charge control method and system are provided, avoid the too high battery that causes of battery charge temperature to damage, prolong battery useful life.
For realizing above-mentioned purpose, according to an aspect of the present invention, a kind of charge control method is provided, comprising:
Preestablish charge parameter and the temperature of monomer/every Battery pack and the corresponding relation of ambient temperature of monomer/every Battery pack, store into and control database;
In charging process, measure the temperature and the ambient temperature of monomer/every Battery pack;
Temperature and ambient temperature according to said monomer/every Battery pack are inquired about in said controlling database, and confirm the charge parameter of next stage charging;
According to the charge parameter control monomer of confirming/every Battery pack charging.
Preferably, this method also comprises:
Preestablish charge parameter and the voltage of monomer/every Battery pack and/or the corresponding relation of electric current of monomer/every Battery pack, store in said the controlling database;
Measure the voltage and/or the electric current of said monomer/every Battery pack;
Voltage and/or electric current according to said monomer/every Battery pack are inquired about in said controlling database, and confirm the charge parameter of next stage charging.
Preferably, this method also comprises:
Preestablish the charge parameter of monomer/every Battery pack and the corresponding relation of monomer/electric weight that every Battery pack charges into, store in said the controlling database;
Voltage and current according to said monomer/every Battery pack of measuring calculates the electric weight that said monomer/every Battery pack charges into;
Calculate the actual capacity and the residual capacity of said monomer/every Battery pack according to said monomer/electric weight that every Battery pack charges into and the nominal capacity of battery;
Actual capacity and residual capacity according to said monomer/every Battery pack are inquired about in said controlling database, and confirm the charge parameter of next stage charging.
More preferably, this method also comprises:
When the temperature of said monomer/every Battery pack surpasses the preset alarm temperature threshold, stop said monomer/every Battery pack charging is alarmed.
For realizing above-mentioned purpose, according to another aspect of the present invention, a kind of charge control system is provided, comprising:
Control database, be used to store charge parameter and the temperature of monomer/every Battery pack and the corresponding relation of ambient temperature of predefined monomer/every Battery pack;
Sample circuit is used for measuring in charging process the temperature and the ambient temperature of monomer/every Battery pack;
The charge arrangement device is used for inquiring about to said controlling database according to the temperature and the ambient temperature of said monomer/every Battery pack, confirms the charge parameter of next stage charging;
Battery charge controller is used for according to the charge parameter control monomer of confirming/every Battery pack charging.
Preferably, said controlling database also is used to store the charge parameter and the voltage of monomer/every Battery pack and/or the corresponding relation of electric current that preestablish monomer/every Battery pack;
Said sample circuit is used for the voltage and/or the electric current of the said monomer of actual measured amount/every Battery pack;
Said charge arrangement device is used for inquiring about to said controlling database according to the actual capacity and the residual capacity of said monomer/every Battery pack, confirms the charge parameter of next stage charging.
More preferably, said controlling database also is used to store the charge parameter of predefined monomer/every Battery pack and the corresponding relation of monomer/electric weight that every Battery pack charges into;
Said charge arrangement device is used for calculating the electric weight that said monomer/every Battery pack charges into according to the voltage and current of said monomer/every Battery pack of measuring; Calculate the actual capacity and the residual capacity of said monomer/every Battery pack according to said monomer/electric weight that every Battery pack charges into and the nominal capacity of battery; Actual capacity and residual capacity according to said monomer/every Battery pack are inquired about in said controlling database, and confirm the charge parameter of next stage charging.
Wherein, Said charge arrangement device comprises: single-chip microcomputer; Be used for inquiring about controlling database of said single-chip microcomputer according to temperature, ambient temperature, voltage and/or the electric current of monomer/every Battery pack of measuring; Confirm the charge parameter of next stage, generate corresponding configuration signal and be sent to said battery charge controller;
Said battery charge controller comprises: the redundant pulse width modulator of twin-core sheet, be used for configuration signal according to said single-chip microcomputer generation, and control charging voltage and the charging current of next stage respectively.
Said sample circuit comprises: first order sample circuit is used for temperature, voltage and/or electric current at charging process measurement cell; Second level sample circuit is used for temperature, voltage and/or electric current at the single every Battery pack of charging process measurement, and ambient temperature.
More preferably, this system also comprises: alarm device is used for when the temperature of said monomer/every Battery pack surpasses the preset alarm temperature threshold, alarming.
Charge control method of the present invention and system through the real-time temperature of monitoring monomer/every Battery pack in charging process, confirm the charge parameter of each charging stage according to the variation of battery temperature, according to the charging of these charge parameters controls to monomer/every Battery pack.Like this, when making that battery charges fully, avoid the too high battery that causes of battery charge temperature to damage, the protection battery prolongs battery useful life.
Description of drawings
Fig. 1 is the flow chart of charge control method embodiment of the present invention;
Fig. 2 is a charging control process sketch map of the present invention;
Fig. 3 is the structure chart of charge control system embodiment of the present invention;
Fig. 4 is the structure chart of another embodiment of charge control system of the present invention.
Embodiment
Basic charging principle of the present invention is confirmed concrete charge parameter by single-chip microcomputer according to temperature, charging voltage and the charging current of battery to be charged, comes to charge for battery.Below in conjunction with accompanying drawing the present invention is elaborated.
Method embodiment
As shown in Figure 1, the flow process of charge control method embodiment of the present invention may further comprise the steps:
Step 108 is according to the charge parameter control monomer of confirming/every Battery pack charging.
Further, also preestablish charge parameter and the voltage of monomer/every Battery pack and/or the corresponding relation of electric current of monomer/every Battery pack, store in said the controlling database; Measure the voltage and/or the electric current of said monomer/every Battery pack; Voltage and/or electric current according to said monomer/every Battery pack are inquired about in said controlling database, and confirm the charge parameter of next stage charging.
Perhaps, preestablish the charge parameter of monomer/every Battery pack and the corresponding relation of monomer/electric weight that every Battery pack charges into, store in said the controlling database; Voltage and current according to said monomer/every Battery pack of measuring calculates the electric weight that said monomer/every Battery pack charges into; Calculate the actual capacity and the residual capacity of said monomer/every Battery pack according to said monomer/electric weight that every Battery pack charges into and the nominal capacity of battery; Actual capacity and residual capacity according to said monomer/every Battery pack are inquired about in said controlling database, and confirm the charge parameter of next stage charging.
Wherein, the charge parameter of battery comprises: the charging modes of battery, and like trick charge, voltage stabilization and current stabilization, little electric current voltage stabilizing charging or the like, charging voltage and charging current.
Below for example charge control method of the present invention is specified.
As shown in Figure 2, curve C 1 expression cell charging curve, the current curve of the every Battery pack charging of curve C 2 expressions, the voltage curve of the every Battery pack charging of curve C 3 expressions.
In the S1 stage, during the charging beginning, at first detect temperature, voltage and the ambient temperature of battery to be charged, if battery temperature normal (as 25 degrees centigrade), voltage is lower than 3V, then carries out precharge, generally selects about 0.05C; If charging voltage is than the high 0.25v of cell voltage to be charged, then constant voltage constant current charging half an hour is carried out in control; As detect pond to be charged temperature too high (as 26-28 degree centigrade) and just change the temperature control trick charge stage into, selecting charging current is about 0.03C; If after temperature is normal then according to charging current is that 0.05C continues charging.In controlling database, the corresponding relation of monomer/every Battery pack and ambient temperature and charging modes, charging voltage and charging current is shown in following table 1 and table 2.
Table 1
Table 2
In the S2 stage, in the charging process, in time the charging current size is adjusted according to the real time temperature situation of change of monomer/every Battery pack and environment all the time.Simultaneously, adjust charging modes, charging voltage and charging current according to the voltage and the discharging current of battery.The corresponding relation of cell voltage and discharging current and charging modes, charging voltage and charging current is as shown in table 3 below.
Table 3
| Cell voltage (monomer) | Battery discharge current | Charging modes | Charging voltage | Charging current |
| 3.16 | 0.05C | The voltage stabilization and current stabilization charging | 4.2v | 0.1c |
| 3.65222 | 0.1C | The voltage stabilization and current stabilization charging | 4.2v | 0.05c |
| 3.78637 | 0.02C | The voltage stabilization and current stabilization charging | 4.2v | 0.1c |
| 4.08047 | 0.1C | Little electric current voltage stabilizing charging | 4.2v | 0.02c |
| 4.1 | 0.1C | Trick charge | 4.2v | 0.01c |
In the S3 stage; In the charging process; The electric weight that charges into according to the voltage and current counting cell of the battery of measuring, the electric weight that charges into according to battery and the actual capacity and the residual capacity of nominal capacity counting cell, and confirm the voltage and current value of charging according to the shared percentage of battery remaining power.
Wherein, the electric weight that charges into of battery is charging current I (peace) * charging interval h.
Regulation or assurance battery should be emitted MIN electric weight when the nominal capacity of battery was meant design and makes battery under certain discharging condition.
The actual capacity of battery is meant the actual electric weight that battery is emitted under certain discharging condition, promptly discharging current I (peace) * h discharge time (hour).Generally be battery cell voltage to the time of setting such as 10.5V etc. discharge time, and it is 50 minutes (0.83 hour) that 500AH battery 60A discharges into the 10.5V time, and its actual capacity is exactly 50/60*60=50AH.The actual capacity of battery mainly receives discharge-rate and Influence of Temperature.
Wherein, remaining capacity=nominal capacity-actual capacity.The plant capacity of cells known load is W watt, and cell voltage is the v volt, and the battery nominal capacity is the Q ampere-hour, and so, after T hour, battery remaining power is: Q-(W/V) * T, the unit of residual capacity is " ampere-hour " when battery operated.
The battery remaining power and the terminal voltage table of comparisons are as shown in table 4 below,
Table 4
| Lithium battery terminal voltage (V) | Residual capacity (mAh) | Residual capacity (%) |
| 3.16 | 0 | 0 |
| 3.49796 | 64.59 | 3 |
| 3.59629 | 107.6 | 5 |
| 3.65222 | 150.59 | 7 |
| 3.68579 | 214.77 | 10 |
| 3.73665 | 429.92 | 20 |
| 3.77137 | 644.84 | 30 |
| 3.78637 | 859.67 | 40 |
| 3.81443 | 1074.9 | 50 |
| 3.86209 | 1289.536 | 60 |
| 3.93642 | 1504.677 | 70 |
| 4.00057 | 1719.838 | 80 |
| 4.08047 | 1934.603 | 90 |
| 4.17463 | 2150 | 100 |
For example, when the residual capacity of battery is 70%, confirm that the next stage charging voltage is 4.00057V, charging current is 0.1C.
In the S4 stage; Monitoring charges into the capacity and the residual capacity of cell; With the mode of Weak current fast lifting voltage each capacity is fallen behind cell and repeats charging, in the charging process all the time the monitoring battery temperature variations adjust the size of charging current and voltage.
When cell voltage is raised to 4.20V, change conventional constant voltage charge into, the maintenance charging voltage is 4.20V.At this moment, charging current descends gradually, when electric current drop to set charging current 1/10 the time, charging finishes.
In sum, the cell charging voltage is maintained until 4.2v and is divided into four steps:
1, whether detection has cell to be lower than 3.5V; If any, the little electric current that uses the 2%-3% that charges normal flow valuve 0.1C does not change as the continuous 1-2 of cell temperature hour being lower than the battery wheel current charge of 3.5V; Use instead than the 4%-5% charging that charges normal flow valuve, make it boost to 3.5V;
If 2 have battery cell to reach 4.2V, get into next step;
3, reduce value and the range upon range of terraced fields cycle-index of wave that flows than the 4%-5% charging that charges normal flow valuve gradually, make the ceiling voltage of cell maintain 4.2V;
4, to not taking turns current charge to the battery of 4.2V, the little electric current that uses the 1%-2% that charges normal flow valuve makes it boost to 4.2V to being lower than the battery wheel current charge one-period of 4.2V, and charging finishes.
Preferably, in the present embodiment, when the temperature of monomer/every Battery pack surpasses the preset alarm temperature threshold, stop said monomer/every Battery pack charging is alarmed.In whole charging process, all the time the temperature of battery is monitored, the temperature of battery is controlled in the scope of user's setting.The scope that surpass to be provided with when battery temperature can be set after 0.5 second, will stop battery charge; Battery temperature get back to the scope of setting with interior 0.5 second after charging continue.Through real-time monitoring warning to temperature, can in time find the problem in the battery charging process, avoid battery because the too high damage of temperature.
Charge control method of the present invention; Through in charging process, monitoring the temperature and the ambient temperature of monomer/every Battery pack in real time; Confirm the charge parameter of each charging stage according to the variation of battery temperature, according to the charging of these charge parameters controls to monomer/every Battery pack.Like this, when making that battery charges fully, avoid the too high battery that causes of battery charge temperature to damage, the protection battery prolongs battery useful life.In addition, in charging process, further consider voltage, electric current and the dump energy etc. of battery, it is more accurate to battery charge to make.
System embodiment
As shown in Figure 3, charge control system embodiment of the present invention comprises:
Preferably, saidly control database 31, also be used to store the charge parameter and the voltage of monomer/every Battery pack and/or the corresponding relation of electric current that preestablish monomer/every Battery pack; Sample circuit 32 is used for measuring in real time the voltage and/or the electric current of monomer/every Battery pack; Charge arrangement device 34 is used for inquiring about to said controlling database according to the actual capacity and the residual capacity of said monomer/every Battery pack, confirms the charge parameter of next stage charging.
More preferably, saidly control database 31, also be used to store the charge parameter of predefined monomer/every Battery pack and the corresponding relation of monomer/electric weight that every Battery pack charges into; Said charge arrangement device 34 is used for calculating the electric weight that said monomer/every Battery pack charges into according to the voltage and current of said monomer/every Battery pack of measuring; Calculate the actual capacity and the residual capacity of said monomer/every Battery pack according to said monomer/electric weight that every Battery pack charges into and the nominal capacity of battery; Actual capacity and residual capacity according to said monomer/every Battery pack are inquired about in said controlling database, and confirm the charge parameter of next stage charging.
As shown in Figure 4; In the present embodiment; Charge arrangement device 34 comprises: single-chip microcomputer; Be used for inquiring about controlling database of said single-chip microcomputer, confirm the charge parameter of next stage, generate corresponding configuration signal and be sent to said battery charge controller according to temperature, ambient temperature, voltage and/or the electric current of monomer/every Battery pack of measuring; Battery charge controller 36 comprises: the redundant pulse width modulator of twin-core sheet, be used for configuration signal according to said single-chip microcomputer generation, and control charging voltage and the charging current of next stage respectively.
Wherein this single-chip microcomputer can be the P89LPC936 chip; The redundant pulse width modulator of twin-core sheet comprises UC3845 and two chips of SG2525A, controls charging current and charging voltage respectively.UC3845 is a high-performance fixed frequency mode PWM controlled device, and the SG2525 chip adopts constant frequency pulse width modulation controlled mode.When charging circuit breaks down when the over-current and-load situation occurring, then in time close SG2525A and UC3845, the main circuit of charging circuit is quit work.
In addition, sample circuit 32 comprises: first order sample circuit is used for temperature, voltage and/or electric current at charging process measurement cell; Second level sample circuit is used for the temperature at the every Battery pack of charging process measurement, promptly measures the temperature in each battery case, and measures the voltage and/or the electric current of every Battery pack.Wherein, the first order adopts circuit to comprise chip TMP300 and S-8204B, and TMP300 is used to detect the temperature of cell, and S-8204B is used to detect the voltage and/or the electric current of cell.Second level sample circuit comprises temperature-measuring module, is used to detect the temperature and the ambient temperature of every Battery pack; Also comprise chip LTC1769 (LTC1760), be used to measure the voltage and/or the electric current of every Battery pack.
First order sample circuit sends to temperature, voltage and/or the electric current of the cell that measures the single-chip microcomputer of second level sample circuit and charge arrangement device; Second level sample circuit sends to single-chip microcomputer with temperature, voltage and/or electric current, the ambient temperature of every Battery pack that detection obtains; Single-chip microcomputer is confirmed the charging modes of monomer/every Battery pack according to these measured values that obtain; Be charging voltage and charging current, and how long adopt this charging voltage and charging current for charging.
This charge control system is specifically controlled the process that battery charges and in said method embodiment, is described in detail, repeats no more at this.
The system of present embodiment also comprises: alarm device 39 is used for when the temperature of said monomer/every Battery pack surpasses the preset alarm temperature threshold, alarming.
Charge control system of the present invention through the real-time temperature of monitoring monomer/every Battery pack in charging process, is confirmed the charge parameter of each charging stage according to the variation of battery temperature, according to the charging of these charge parameters controls to monomer/every Battery pack.Like this, when making that battery charges fully, avoid the too high battery that causes of battery charge temperature to damage, the protection battery prolongs battery useful life.In addition, in charging process, further consider voltage, electric current and the dump energy etc. of battery, it is more accurate to battery charge to make.
What should explain is: above embodiment is only unrestricted in order to explanation the present invention, and the present invention also is not limited in above-mentioned giving an example, and all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the claim scope of the present invention.
Claims (10)
1. a charge control method is characterized in that, comprising:
Preestablish charge parameter and the temperature of monomer/every Battery pack and the corresponding relation of ambient temperature of monomer/every Battery pack, store into and control database;
In charging process, measure the temperature and the ambient temperature of monomer/every Battery pack;
Temperature and ambient temperature according to said monomer/every Battery pack are inquired about in said controlling database, and confirm the charge parameter of next stage charging;
According to the charge parameter control monomer of confirming/every Battery pack charging.
2. charge control method according to claim 1 is characterized in that, also comprises:
Preestablish charge parameter and the voltage of monomer/every Battery pack and/or the corresponding relation of electric current of monomer/every Battery pack, store in said the controlling database;
Measure the voltage and/or the electric current of said monomer/every Battery pack;
Voltage and/or electric current according to said monomer/every Battery pack are inquired about in said controlling database, and confirm the charge parameter of next stage charging.
3. charge control method according to claim 2 is characterized in that, also comprises:
Preestablish the charge parameter of monomer/every Battery pack and the corresponding relation of monomer/electric weight that every Battery pack charges into, store in said the controlling database;
Voltage and current according to said monomer/every Battery pack of measuring calculates the electric weight that said monomer/every Battery pack charges into;
Calculate the actual capacity and the residual capacity of said monomer/every Battery pack according to said monomer/electric weight that every Battery pack charges into and the nominal capacity of battery;
Actual capacity and residual capacity according to said monomer/every Battery pack are inquired about in said controlling database, and confirm the charge parameter of next stage charging.
4. charge control method according to claim 1 is characterized in that, also comprises:
When the temperature of said monomer/every Battery pack surpasses the preset alarm temperature threshold, stop said monomer/every Battery pack charging is alarmed.
5. a charge control system is characterized in that, comprising:
Control database, be used to store charge parameter and the temperature of monomer/every Battery pack and the corresponding relation of ambient temperature of predefined monomer/every Battery pack;
Sample circuit is used for measuring in charging process the temperature and the ambient temperature of monomer/every Battery pack;
The charge arrangement device is used for inquiring about to said controlling database according to the temperature and the ambient temperature of said monomer/every Battery pack, confirms the charge parameter of next stage charging;
Battery charge controller is used for according to the charge parameter control monomer of confirming/every Battery pack charging.
6. charge control system according to claim 5 is characterized in that,
Said controlling database also is used to store the charge parameter and the voltage of monomer/every Battery pack and/or the corresponding relation of electric current that preestablish monomer/every Battery pack;
Said sample circuit is used for the voltage and/or the electric current of the said monomer of actual measured amount/every Battery pack;
Said charge arrangement device is used for inquiring about to said controlling database according to the actual capacity and the residual capacity of said monomer/every Battery pack, confirms the charge parameter of next stage charging.
7. charge control system according to claim 6 is characterized in that,
Said controlling database also is used to store the charge parameter of predefined monomer/every Battery pack and the corresponding relation of monomer/electric weight that every Battery pack charges into;
Said charge arrangement device is used for calculating the electric weight that said monomer/every Battery pack charges into according to the voltage and current of said monomer/every Battery pack of measuring; Calculate the actual capacity and the residual capacity of said monomer/every Battery pack according to said monomer/electric weight that every Battery pack charges into and the nominal capacity of battery; Actual capacity and residual capacity according to said monomer/every Battery pack are inquired about in said controlling database, and confirm the charge parameter of next stage charging.
8. according to claim 6 or 7 described charge control systems; It is characterized in that; Said charge arrangement device comprises: single-chip microcomputer; Be used for inquiring about controlling database of said single-chip microcomputer, confirm the charge parameter of next stage, generate corresponding configuration signal and be sent to said battery charge controller according to temperature, ambient temperature, voltage and/or the electric current of monomer/every Battery pack of measuring;
Said battery charge controller comprises: the redundant pulse width modulator of twin-core sheet, be used for configuration signal according to said single-chip microcomputer generation, and control charging voltage and the charging current of next stage respectively.
9. charge control system according to claim 5 is characterized in that, said sample circuit comprises: first order sample circuit is used for temperature, voltage and/or electric current at charging process measurement cell; Second level sample circuit is used for temperature, voltage and/or electric current at the single every Battery pack of charging process measurement, and ambient temperature.
10. charge control system according to claim 5 is characterized in that, also comprises:
Alarm device is used for when the temperature of said monomer/every Battery pack surpasses the preset alarm temperature threshold, alarming.
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