CN101383436A - Battery charging method and apparatus - Google Patents

Battery charging method and apparatus Download PDF

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Publication number
CN101383436A
CN101383436A CNA2008101984498A CN200810198449A CN101383436A CN 101383436 A CN101383436 A CN 101383436A CN A2008101984498 A CNA2008101984498 A CN A2008101984498A CN 200810198449 A CN200810198449 A CN 200810198449A CN 101383436 A CN101383436 A CN 101383436A
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CN
China
Prior art keywords
battery
charging
module
voltage
detection protection
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CNA2008101984498A
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Chinese (zh)
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CN101383436B (en
Inventor
王红军
喻德茂
范继光
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崧顺电子(深圳)有限公司
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Priority to CN2008101984498A priority Critical patent/CN101383436B/en
Publication of CN101383436A publication Critical patent/CN101383436A/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention discloses a method for charging batteries. The method comprises the following steps: a battery charging module sends an order to a battery monitoring protection module for enquiring whether the battery monitoring protection module is on-line; after receiving the order, the battery monitoring protection module rectifies the communication baud rate and obtains the information of the charging state of a battery; the battery monitoring protection module returns the information of the charging state to the battery charging module; and the battery charging module controls the charging process of the battery according to the information of the charging state. The invention also discloses a device for charging batteries. Through the method and the device for charging batteries disclosed by the invention, the voltage of each battery of a battery pack can be accurately detected to reliably control the charge and the discharge of the battery, and the cost is saved.

Description

A kind of method for charging batteries and device
Technical field
The present invention relates to the charging control field of series battery, relate in particular to a kind of method for charging batteries and device.
Background technology
Outstanding features such as portable type electronic product is small and exquisite with it, be convenient to carry and extremely modern's welcome.It can make people's work, study, amusement avoid the restriction of time, region, increases work efficiency significantly and quality of life.Portable type electronic product is extensive use of rechargeable battery, it have can repeat repeatedly to charge, advantage capacious.Particularly lithium battery is little with its volume, and capacity is big, and the characteristics of life-span length more people are accepted, and are applied to every field more and more.If but the intelligent degree of user's improper use or charger and/or power consumption equipment is not high, will shorten battery life, and then influence new technology applying at industry-by-industry.Want to allow farthest bring into play the useful life of battery, on charger and power consumption equipment, do improvement, be undoubtedly a kind of main approach.
Comparative maturity is used in the management of single-unit lithium battery at present, but the ubiquity weak point is gone back in the management of multi-section serial lithium electricity power brick, for example: cost height, intelligent degree deficiency, control detection error are bigger than normal, this just presses for from charger and power consumption equipment and sets about, and seeks the lithium electricity power brick Charge Management scheme that a kind of price is low, control is reliable, the precision intelligence degree is high.
Summary of the invention
In view of the deficiencies in the prior art, the invention provides a kind of method for charging batteries and device, can judge accurately the charged state of every batteries of battery pack, discharging and recharging reliably of battery controlled.
In order to reach the foregoing invention purpose, the invention provides a kind of method for charging batteries, comprising:
Whether online battery charging module send the order of this battery detection protection module of inquiry to the battery detection protection module;
After described battery detection protection module receives described order, proofread and correct communication baud rate and obtain the charging status information of battery;
Described battery detection protection module is given described battery charging module with the charging status information loopback of being obtained;
Described battery charging module is controlled battery charging process according to described charging status information.
Simultaneously, the present invention also provides a kind of battery charger, comprising:
Battery charging module is used for controlling battery charging process with the communication of battery detection protection module;
The battery detection protection module is used to proofread and correct communication baud rate, obtains the state information of charging, and this information is sent to battery charging module;
Described battery charging module is connected with described battery detection protection module, controls charging to battery by half duplex communication between described two modules.
The present invention carries out the charging process that battery is controlled in semiduplex communication by battery charging module and battery detection protection module; in this process; the battery detection protection module is proofreaied and correct communication baud rate and is obtained the state information of charging; and this information sent to battery charging module; make battery charging module control the charging process of battery; the invention has the beneficial effects as follows; can the voltage of every batteries of battery pack be detected accurately; discharging and recharging reliably of battery controlled, and saved cost.
Description of drawings
Fig. 1 is the schematic flow sheet of the embodiment of a kind of method for charging batteries of the present invention;
Fig. 2 is a battery charging module workflow schematic diagram in a kind of method for charging batteries of the present invention;
Fig. 3 is a battery detection protection module workflow schematic diagram in a kind of method for charging batteries of the present invention;
Fig. 4 is the schematic diagram of the embodiment of a kind of battery charger of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Please refer to Fig. 1, is the schematic flow sheet of the embodiment of a kind of method for charging batteries of the present invention, comprises step:
Whether online s101, battery charging module send the order of this battery detection protection module of inquiry to the battery detection protection module;
Herein; described battery charging module is to carry out communication by the half duplex communication mode that single line is connected with described battery detection protection module; in actual applications, be the single-chip microcomputer (hereinafter to be referred as main frame) that utilizes battery charging module and single-chip microcomputer (hereinafter to be referred as slave) in the battery detection protection module carries out communication.
After s102, described battery detection protection module receive described order, proofread and correct communication baud rate and obtain the charging status information of battery;
Among the described s102, the step that the battery detection protection module is proofreaied and correct communication baud rate comprises:
Whether online described battery detection protection module receive the order of the described battery detection protection module of inquiry that described battery charging module sends;
Obtain the baud rate of described battery charging module according to the command parameter in the described order;
According to the baud rate that the baud rate of described battery charging module is proofreaied and correct described battery detection protection module, make the baud rate of the baud rate of described battery detection protection module and described battery charging module synchronous.
The method that above-mentioned correction baud rate is adopted is inner RC concussion, utilizes the asynchronous communication register configuration characteristics of Freescale (freescale) single-chip microcomputer MC9S08QG8 inside and conclusion that the conversion done draws after handling.
For example, in the present embodiment, if host setting is ordered 0x55 with the baud rate of 9600bps to the slave transmission; described order 0x55 is according to the setting of communications protocol; the implication of its representative is, when the battery detection protection module is a slave when receiving this order, will proofread and correct communication baud rate.The byte format of described 0x55 is: a start bit, and 8 data bit, a position of rest, so 0x55 is when being sent completely, the used time is 10 ÷ 9600=1.04ms.
5 rising edges are arranged in the 0x55 timing waveform, first rising edge in the timing waveform of the 0x55 that slave is sent by main frame triggers, 4ms inside counting rising edge number from first rising edge, when receiving the 5th rising edge, the slave counter stops timing, like this, first just has 8 positions between the 5th rising edge, slave timer numerical value is exactly the time that main frame sends a bit data divided by 8, like this, slave just can be revised inner register configuration value, to reach the purpose synchronous with the main frame baud rate.
Slave adopts the baud rate of freescale single-chip microcomputer MC9S08QG8 inside to be provided with:
f _bit=f _busclk/16/BR
So, one time is:
T _bit=16*BR/f _busclk………………①
T _ bit: one time
f _ bit: the inverse of bit time
BR: the value of setting of single-chip microcomputer baud rate register
f _ busclk: the Bus Clock Rate of single-chip microcomputer
Slave receives 0x55, and the time of 5 rising edges is T=CNT * PS/f _ busclk, the time that sends the one digit number certificate so is:
T _bi=CNT×PS/f _busclk/8……………②
T _ bit: one time
CNT: the value of modulus timer counter register (MTIMCNT)
PS: the clock source divider-value in modulus timer clock configuration (MTIMCLK) register
f _ busclk: the Bus Clock Rate of single-chip microcomputer
Can draw as drawing a conclusion by 1. and 2. formula:
BR=CNT×PS/128…………③
It is 128 frequency divisions that single-chip microcomputer can preestablish register PS value, i.e. PS=128, and 3. formula is exactly so:
BR=CNT…………………④
By above-mentioned formula 4. as can be seen, as long as slave reads the value of register CNT, and can use the baud rate identical to set slave the value of the setting BR that value is given single-chip microcomputer baud rate register with main frame.
This programme adopts the method for inner RC concussion to proofread and correct baud rate, compares with the method for external crystal-controlled oscillation commonly used, provides cost savings, and has guaranteed communication quality.
Among the described s102, the described step of obtaining the charging status information of battery comprises:
Obtain the digital quantization value of calibration voltage and this calibration voltage correspondence after sampling;
Calibration voltage and digital quantization value that storage is obtained;
Describedly calibration voltage and digital quantization value obtained and stored, in the process that can produce, calibration voltage and digital quantization value are provided with and store in advance.
Obtain detection voltage pairing digital quantization value after the monitoring and protecting module samples of battery;
Digital quantization value according to described detection voltage, pass through formula: the product that detects the voltage digital quantization value corresponding with calibration voltage equals the corresponding digital quantization value of described detection voltage and the product of calibration voltage, thereby calculates the information of voltage that the numerical value that detects voltage obtains battery;
Below the process of the detection voltage that obtains battery is described in detail.
When producing, at first calibrate sampled voltage, to obtain best battery voltage sampling precision.For example, adopt the outside accurately calibration in advance of 8400mV ± 5mV for five series lithium batteries.
When making analog digital conversion (AD) sampling high voltage with single-chip microcomputer, generally by delivering to the Chip Microcomputer A mouth behind the electric resistance partial pressure.Must convert according to following formula:
V×K/D=V ref/2 n………………①
V: the purpose voltage of being sampled
K: voltage ratio is the ratio of divider resistance, is R Down/ (R On+ R Down)
D: the digital quantization value of single-chip microcomputer sampling
V Ref: the Chip Microcomputer A fiducial reference source
N: the figure place of Chip Microcomputer A
In general measurement is calculated, want to detect certain fixed point pressure point, the formula artificial hand digital quantization value of calculating corresponding single-chip microcomputer sampling gets final product thus, the artificial hand is here regarded the resistance of sampling channel and AD reference source as that ideal value considers to calculate at last, but can there be deviation in actual conditions, so single chip computer measurement also has certain error when controlling.
For fear of the error of the resistance and the AD reference source of sampling channel, this programme adopts a kind of special algorithm to avoid error.
Special algorithm principle is: because sampling many times all is to convert through identical sampling channel parameter and AD fiducial reference source, so can be in advance accurate once sampling first, sampled data is deposited in the electricallyerasable ROM (EEROM) (EEPROM) of single-chip microcomputer, later sampling can relatively convert with accurate sampling first, calculates the numerical value of surveying.
It below is reasoning process to this algorithm.
Accurate first once sampling is referred to as the calibration sampling to this sampling, applies mechanically formula 1.:
V _adj×K/D _adj=V ref/2 n………………②
V _ adj: the magnitude of voltage of this calibration
D _ adj: the magnitude of voltage of this calibration is corresponding digital quantization value after the single-chip microcomputer sampling
1. later detection sampling applies mechanically formula:
V _ survey* K/D _ survey=V Ref/ 2 n3.
2. and 3. get by formula:
V _ survey=D _ survey* V _ adj/ D _ adj4.
V _ survey: the magnitude of voltage of this detection
D _ survey: the magnitude of voltage of this detection is corresponding digital quantization value after the single-chip microcomputer sampling
Thus formula 4. as can be seen, measurement result V _ surveyIrrelevant, only relevant with calibration voltage sample quantization value with the resistance and the AD reference source of sampling channel with calibration voltage.So, we are when measuring other point voltage, as long as can learn external detection voltage with this formula by single-chip microcomputer sampling calculating.The D here _ surveyWith D _ adjAll be that middle 16 times mean value is considered as authentic data through after 32 the continuous sampling ordering.
During with this algorithm, the calibration sampled voltage should be tried one's best accurately ,≤± 5mV.What time following select for use element to note, to reach optimum efficiency.
The low drift of sampling channel divider resistance impedance;
The low drift of Chip Microcomputer A fiducial reference source output;
The Chip Microcomputer A integral non-linear error is as far as possible little.
The charging status information of battery also comprises the temperature information of battery except the detection information of voltage of battery, as follows:
Obtain the temperature information of battery by the temperature of the battery that thermistor detected.
For example, in the process of obtaining the lithium battery temperature information, if when the temperature of battery is higher or lower than normal temperature range, battery charging module can be controlled and cut off charging, when temperature falls after rise to normal range (NR), can proceed charging.
The information of voltage of above-mentioned battery and temperature information have been formed the charging status information of battery, as: be full of, fill soon, replenish, excess temperature etc.
If described battery is the lithium battery of multi-section serial, described battery detection protection module can carry out independent voltage and temperature detection to every batteries, has improved accuracy.
S103, described battery charging module are to the order of described battery detection protection module transmission to described battery charging module loopback charging status information;
Described s103 also can omit in concrete enforcement, also promptly: described battery detection protection module can be directly after obtaining battery charging state information the charging status information loopback module that charges the battery.
S104, described battery detection protection module are given described battery charging module with the charging status information loopback of being obtained;
S105, described battery charging module are controlled battery charging process according to described charging status information.
Herein, battery charging module according to charging status information as: preliminary filling, fill soon, information such as excess temperature controls the charging to battery.
Described method for charging batteries also comprises:
When opening electricity and relay electricity, described battery detection protection module detects battery discharge voltage, if when the cell voltage of any joint is lower than protection voltage, will cut off the power supply that described battery changes electricity.
Herein; can prevent when the single-unit lithium battery forces down in protection voltage; still be used; thereby reduced battery life; in concrete enforcement; can in electric revolving die piece, increase by an electricity commentaries on classics power control circuit and carry out putting control; when opening electricity and relay electricity; meeting wakes described battery detection protection module up by the signal of the rising edge of a PORT COM output that electricity changes from holding state; described monitoring and protecting module begins to detect in real time the voltage of battery; when cell voltage is lower than protection voltage, then cuts off battery by force and protect battery for the power supply of electricity commentaries on classics load.
Control and finish the charging process of battery in order to be more readily understood battery charging module and battery detection protection module by semiduplex communication, below tell about the workflow of described battery charging module and battery detection protection module respectively.
Please refer to Fig. 2, is battery charging module workflow schematic diagram in a kind of method for charging batteries of the present invention, comprising:
S201, battery charging module (hereinafter to be referred as main frame) detect charging inlet and whether have voltage, if do not exist, then carry out s202, if there is voltage, then carry out s203.
Complete charge operation after s202, Light Condition, this step are finished;
Whether online s203, main frame send order 0x55 to battery detection protection module (hereinafter to be referred as slave);
In the present embodiment, described order 0x55 is according to the setting of communications protocol, and the implication of its representative is, when the battery detection protection module is a slave when receiving this order, and will be from the dynamic(al) correction communication baud rate.
After s204, the time-delay 200ms, main frame sends the order 0x51 or the 0x52 of loopback battery information to slave;
Herein, 0x51 illustrates to insert battery first, and the request echo battery information, and 0x52 illustrates to insert battery, and the request echo battery information.
S205, judge whether at the appointed time,, be, then carry out among s207~s212 any one or a plurality of step,, then carry out s206 if be judged as not if be judged as receiving the charging status information of battery in the 500ms;
S206, break down, when not receiving the charging status information that slave sends in the 500ms, can think that it is out of order, when surpassing 500ms, the voltage of charging inlet also is zero, can think that battery has left charging device, complete charge operation after this step is finished;
S207, preliminary filling when battery is in a certain low voltage level, are not ready for accepting complete charging current, generally will carry out precharge with a lower electric current;
S208, fill soon, battery is carried out quick charge;
S209, benefit electricity, there has been electric weight in battery, and when also needing boost charge, its state is " benefit ";
S210, excess temperature, just temperature has exceeded the protection temperature of battery, as〉45 ℃ or<0 ℃, concrete temperature value can be done suitably change according to battery performance;
S211, be full of, when battery is full of electricity, will show the state of " being full of ";
S212, fault, when main frame was received error message, its state was " fault ";
Above-mentioned steps is order in no particular order, after carrying out s211 or s212, and the complete charge operation.
S213, judge whether temperature is recovered normally, be if be judged as, repeated execution of steps s203~s213 then, if be judged as not, then complete charge operation.
Please refer to Fig. 3, is battery detection protection module workflow schematic diagram in a kind of method for charging batteries of the present invention, comprising:
The battery sampling voltage of s301, correction battery detection protection module;
S302, judge whether slave is triggered in official hour, if be judged as not, then slave is in standby mode, is then to carry out s303 if be judged as;
S303, slave judge the number of the rising edge that is triggered, if be judged as 5, if carry out s303, if be judged as 1, then carry out s310, if judged result is not 1 not to be 5 yet, then carry out s309, promptly break down;
S304, calibration communication baud rate;
The voltage and the temperature of s305, detection battery;
S306, judge and obtain the charging status information of battery;
The order 0x51 or the 0x52 of the loopback battery charging state information that s307, reception main frame send;
S308, in 500ms, slave sends charging status information to main frame, this step repeats s302 after finishing again;
S309, do not send charging status information, then do not break down to main frame if surpass the 500ms slave;
S310, startup electricity change, and carry out battery discharge;
In s311, the discharge process, whether the voltage that the battery detection protection module detects battery is low excessively, if be judged as is, then carries out s312, if be judged as not, then carries out s314;
S312, cut-out battery change the power supply of load for electricity;
S313, enter standby mode;
S314, the control of discharging is handled with voltage detecting to battery.
Fig. 4 is the schematic diagram of the embodiment of a kind of battery charger 40 of the present invention.Comprise:
Battery charging module 41 is used for controlling battery charging process with 42 communications of battery detection protection module;
Described battery charging module 41 comprises:
Whether online command sending unit 411 be used for sending this battery detection protection module of inquiry 42 order and to the order of battery charging module 41 loopback charging status informations to battery detection protection module 42;
Information receiving unit 412 is used to receive the charging status information that battery detection protection module 42 sends to described battery charging module 41;
Control unit 413 is used for according to described charging status information control battery charging process.
Battery detection protection module 42 is used to proofread and correct communication baud rate, obtains the state information of charging, and this information is sent to battery charging module 41;
Described battery detection protection module 42 comprises:
Whether online order receiving element 421 be used to receive battery charging module 41 and send this battery detection protection module of inquiry 42 order to battery detection protection module 42;
Acquiring unit 422 is used for according to described order, proofreaies and correct communication baud rate and obtains the charging status information of battery;
Described acquiring unit 422 comprises:
Baud rate is obtained subelement 4221, be used to obtain the baud rate of described battery charging module 41, according to the baud rate that the baud rate of described battery charging module 41 is proofreaied and correct described battery detection protection module 42, make the baud rate of the baud rate of described battery detection protection module 42 and described battery charging module 41 synchronous;
Detect voltage and obtain subelement 4222, be used to obtain detection voltage pairing digital quantization value after 42 samplings of monitoring and protecting module of battery, again according to formula: the product that detects the voltage digital quantization value corresponding with calibration voltage equals the corresponding digital quantization value of described detection voltage and the product of calibration voltage, thereby calculates the information of voltage that the numerical value that detects voltage obtains battery;
Battery temperature obtains subelement 4223, and the temperature that is used for the battery that detects by thermistor is obtained the temperature information of battery.
Information transmitting unit 423, described battery charging module 41 is given in the charging status information loopback that is used for being obtained.
Described battery charging module 41 is connected with described battery detection protection module 42, controls charging to battery by half duplex communication between described two modules.
In concrete enforcement, battery charging module 41 is positioned at a stand-alone shell, and three interface BAT+, BAT-and COM are arranged, and wherein COM port is used for carrying out communication with battery detection protection module 42; Battery detection protection module 42 is positioned at power brick; monitor the voltage of single-unit lithium battery by the single-chip microcomputer in the battery detection protection module 42; described battery detection protection module 42 can be expanded lithium battery balanced management circuit; that is, when battery charged, those too high batteries of cell voltage were opened a shunt circuit; so that when charging; the charging current of battery changes along with the change of cell voltage, thereby makes Charge Management intelligent more, has prolonged the life-span of battery.
Electricity changes control module 43, is used for when opening electricity and relay electricity, if when the cell voltage that any joint is detected through described battery detection protection module 42 is lower than protection voltage, will cut off the power supply of described battery to the electricity commentaries on classics.
Herein; in order to prevent when the single-unit lithium battery forces down in protection voltage; still be used; thereby reduced battery life; in concrete enforcement; can change in the control module 43 at electricity increases by an electricity and changes power control circuit and carried out putting control; when opening electricity and relay electricity; the signal of a rising edge of a PORT COM output that can change by electricity wakes described battery detection protection module 42 up from holding state; described monitoring and protecting module 42 beginnings detect the voltage of battery in real time; when cell voltage is lower than protection voltage, then cuts off battery by force and protect battery for the power supply of electricity commentaries on classics load.
Described electricity changes control module 43 and is connected with described battery detection protection module 42; in actual applications, electricity three interface BAT+, the BAT-and the COM that change three interface BAT+, BAT-of control module 43 lead-out terminals and COM and described battery detection protection module 42 lead-out terminals is connected.
The beneficial effect of this programme is, can the voltage of every batteries of battery pack be detected accurately, discharging and recharging reliably of battery controlled, and saved cost.
Above disclosed is preferred embodiment of the present invention only, can not limit the present invention's interest field certainly with this, and therefore the equivalent variations of doing according to claim of the present invention still belongs to the scope that the present invention is contained.

Claims (12)

1, a kind of method for charging batteries comprises:
Whether online battery charging module send the order of this battery detection protection module of inquiry to the battery detection protection module;
After described battery detection protection module receives described order, proofread and correct communication baud rate and obtain the charging status information of battery;
Described battery detection protection module is given described battery charging module with the charging status information loopback of being obtained;
Described battery charging module is controlled battery charging process according to described charging status information.
2, method for charging batteries according to claim 1 is characterized in that, described battery detection protection module comprises for the step of described battery charging module before the charging status information loopback of being obtained:
Described battery charging module is to the order of described battery detection protection module transmission to described battery charging module loopback charging status information.
3, method for charging batteries according to claim 1 also comprises:
When opening electricity and relay electricity, described battery detection protection module detects battery discharge voltage, if when the cell voltage of any joint is lower than protection voltage, will cut off the power supply that described battery changes electricity.
4, method for charging batteries according to claim 1 is characterized in that, described battery charging module and described battery detection protection module carry out communication by the half duplex communication mode.
5, method for charging batteries according to claim 4 is characterized in that, the step that described battery detection protection module is proofreaied and correct communication baud rate comprises:
Whether online described battery detection protection module receive the order of the described battery detection protection module of inquiry that described battery charging module sends;
Obtain the baud rate of described battery charging module according to the command parameter in the described order;
According to the baud rate that the baud rate of described battery charging module is proofreaied and correct described battery detection protection module, make the baud rate of the baud rate of described battery detection protection module and described battery charging module synchronous.
6, method for charging batteries according to claim 5 is characterized in that, the described step of obtaining the charging status information of battery comprises:
Obtain detection voltage pairing digital quantization value after the monitoring and protecting module samples of battery;
Digital quantization value according to described detection voltage, pass through formula: the product that detects the voltage digital quantization value corresponding with calibration voltage equals the corresponding digital quantization value of described detection voltage and the product of calibration voltage, thereby calculates the information of voltage that the numerical value that detects voltage obtains battery;
Obtain the temperature information of battery by the temperature of the battery that thermistor detected.
7, method for charging batteries according to claim 6 is characterized in that, the described step of obtaining detection voltage pairing digital quantization value after the monitoring and protecting module samples of battery also comprises before:
Obtain the digital quantization value of calibration voltage and this calibration voltage correspondence after sampling;
Calibration voltage and digital quantization value that storage is obtained.
8, a kind of battery charger comprises:
Battery charging module is used for controlling battery charging process with the communication of battery detection protection module;
The battery detection protection module is used to proofread and correct communication baud rate, obtains the state information of charging, and this information is sent to battery charging module;
Described battery charging module is connected with described battery detection protection module, controls charging to battery by half duplex communication between described two modules.
9, battery charger according to claim 8 is characterized in that, also comprises:
Electricity changes control module, is used for when opening electricity and relay electricity, if when the cell voltage that any joint is detected through described battery detection protection module is lower than protection voltage, will cut off the power supply of described battery to the electricity commentaries on classics;
Described electricity changes control module and is connected with described battery detection protection module.
10, battery charger according to claim 8 is characterized in that, described battery charging module comprises:
Whether online command sending unit be used for sending the order of this battery detection protection module of inquiry and to the order of battery charging module loopback charging status information to the battery detection protection module;
Information receiving unit is used to receive the charging status information that the battery detection protection module sends to described battery charging module;
Control unit is used for according to described charging status information control battery charging process.
11, battery charger according to claim 8 is characterized in that, described battery detection protection module comprises:
Whether online the order receiving element be used to receive battery charging module and send the order of this battery detection protection module of inquiry to the battery detection protection module;
Acquiring unit is used for according to described order, proofreaies and correct communication baud rate and obtains the charging status information of battery;
Information transmitting unit, described battery charging module is given in the charging status information loopback that is used for being obtained.
12, battery charger according to claim 11 is characterized in that, described acquiring unit comprises:
Baud rate is obtained subelement, be used to obtain the baud rate of described battery charging module, according to the baud rate that the baud rate of described battery charging module is proofreaied and correct described battery detection protection module, make the baud rate of the baud rate of described battery detection protection module and described battery charging module synchronous;
Detect voltage and obtain subelement, be used to obtain detection voltage pairing digital quantization value after the monitoring and protecting module samples of battery, again according to formula: the product that detects the voltage digital quantization value corresponding with calibration voltage equals the corresponding digital quantization value of described detection voltage and the product of calibration voltage, thereby calculates the information of voltage that the numerical value that detects voltage obtains battery;
Battery temperature obtains subelement, and the temperature that is used for the battery that detects by thermistor is obtained the temperature information of battery.
CN2008101984498A 2008-09-10 2008-09-10 Battery charging method and apparatus CN101383436B (en)

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CN107508337A (en) * 2017-08-08 2017-12-22 苏州融硅新能源科技有限公司 Off-network solar energy activation method for lithium battery, active circuit, controller for solar
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