CN2672668Y - Lithium power battery formation measuring and controlling device - Google Patents
Lithium power battery formation measuring and controlling device Download PDFInfo
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- CN2672668Y CN2672668Y CN 200420030172 CN200420030172U CN2672668Y CN 2672668 Y CN2672668 Y CN 2672668Y CN 200420030172 CN200420030172 CN 200420030172 CN 200420030172 U CN200420030172 U CN 200420030172U CN 2672668 Y CN2672668 Y CN 2672668Y
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 21
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 19
- 230000008859 change Effects 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 11
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- 238000012544 monitoring process Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
A lithium power battery formation measurement and control device comprises an upper computer and at least one field control unit, wherein the upper computer and the at least one field control unit are communicated by adopting a field bus CAN; the on-site control unit mainly comprises a formation transmitting module, a digital signal processor, a control driving circuit, a storage module, a D/A converter, a DC/DC conversion module, a discharging module and a protection module, wherein the input of the formation transmitting module is connected with a formation battery, the output of the formation transmitting module is an input signal of the protection module and is respectively connected with the digital signal processor, the protection module is connected to the digital signal processor, the output of the digital signal processor is connected with the D/A converter, the output of the D/A converter is connected with the DC/DC conversion module and the discharging module through the control driving circuit, the power supply of the discharging module is input to the formation battery, and the output of the DC/DC conversion module is output to the formation battery. The device has the characteristics of large capacity (large current), programmable formation parameter setting and high-precision control of charging and discharging current and voltage.
Description
Technical field
The utility model relates to a kind of lithium dynamical battery and changes into measure and control device, realizes the full-digital control to lithium dynamical battery charging, discharge process.
Background technology
Changing into of lithium ion battery except being makes the galvanic action material borrow to charge for the first time to change into the normal electrical chemical action, also is to make negative plates generate the important procedure of passivating film.Lithium ion battery is " fragile " relatively, and temperature, electric current and the voltage that charges is all had strict demand.As: single-unit electricity core upper voltage limit is 4.2V, and voltage transfinites and can damage battery, even blast, so lithium ion cell charging equipment must be equipped with holding circuit, and charging voltage, electric current and the temperature of battery are carried out monitoring and protecting.And traditional ni-mh, Ni-Cr battery charger control accuracy are lower, and defencive function is poor, uses this charger can damage lithium ion battery for a long time, so lithium ion battery should adopt special charging equipment when changing into test.
At present, the lithium battery of middle low capacity changes into and mostly adopts special-purpose lithium cell charging chip or common single-chip microcomputer to finish, but this mode is in the chemical synthesis technology of jumbo lithium battery complexity, require the multistage parameter able to programme fully, special chip can't be realized, and because the parameter of its monitoring and control accuracy, real-time require all very highly, therefore the control effect of common single-chip microcomputer neither be very good.
The utility model content
The purpose of this utility model provides a kind of lithium dynamical battery and changes into measure and control device, what it can realize large-capacity power type lithium ion battery (also being applicable to NiH battery, lead-acid accumulator etc.) production development process changes into, discharges and recharges detection, and solved following several key problems: 1) high capacity (big electric current) lithium battery changes into the observing and controlling problem; 2) programmablely change into the parameter setting; And 3) High Accuracy Control of charging and discharging currents, voltage.
To achieve these goals, technical solutions of the utility model are: comprise host computer and at least one field control unit, adopt CAN Bus to communicate between the two; Wherein field control unit is by changing into transmitting module, digital signal processor, control Driver Circuit, memory module, CAN bus communication module and D/A converter, the DC/DC modular converter, discharge module, protection module is formed, wherein with described digital signal processor as core processor, the input end that changes into transmitting module is from changing into battery, output signal is the input signal of protection module, and link to each other with digital signal processor, protection module links to each other with the A/D input pin of digital signal processor, the synchronous serial bus of digital signal processor links to each other with D/A converter, the output of D/A converter is through control Driver Circuit and DC/DC modular converter, discharge module links to each other, the power supply input signal of discharge module is connected to and changes into battery, and the output of DC/DC modular converter is connected to and changes into battery; The CAN port of digital signal processor links to each other with CAN bus communication module;
Described change into transmitting module by formation voltage transmitting module, forming current transmitting module, change into the battery temperature transmitting module and change into the spin manifold temperature transmitting module and form, input end is respectively from changing into battery, output signal is respectively the input signal of protection module, and links to each other with the A/D pin of digital signal processor; When having a plurality of field control unit, be in parallel with the connected mode of host computer; The described charging circuit that changes into battery is made of the DC/DC modular converter, and described discharge circuit is made of discharge module.
Compared with prior art, the utlity model has following advantage:
1. the utility model is a core with brand-new high speed digital signal processor (DSP), has formed the flexible charging/discharging apparatus of high-performance high-level efficiency control in conjunction with novel DC/DC power module (DC-to-dc modular converter).Have that sample rate is fast, control accuracy is high, defencive function is perfect, flexible and convenient operation and realize the characteristics of full process automatization control, for high capacity (big electric current) lithium battery changes into observing and controlling a new technology path is proposed.
2. have the programmable parameter that changes into function is set.Because the utility model adopts digital signal processor, can realize programming flexibly, improve easily and upgrade, guarantee that design has very strong versatility, the High Accuracy Control of charging and discharging currents, voltage makes charging process reliable and stable.
3. the characteristics that have multiple function, flexible operation.Adopt the utility model, can carry out freely being provided with,, in discharge regime, can realize constant-current discharge, constant voltage discharge etc. as in the charging stage, realizing constant-current charge, constant-voltage charge according to the chemical synthesis technology of battery production producer.The utility model not only can be realized each battery cell is controlled automatically by the CAN bus interface, and the systematic parameter of setting and chemical synthesis technology can be permanently stored among the EEPROM automatically, but also can utilize the CAN bus to realize team control.In whole formation process, can accomplish charging and discharging currents, cell voltage, battery temperature, housing temperature, charge are monitored in real time.
4. applied widely.The extensive lithium battery test of the utility model particularly suitable possesses security feature and also is fit to the other types battery testing simultaneously.For the lithium battery test provides safeguard protection, being to discharge and recharge provides voltage clamp and current protection, and battery overcharges or over-discharge can with regard to not occurring like this; Can be applicable to the control that changes into of different model lithium dynamical battery.
Description of drawings
Fig. 1 is a general principles block diagram of the present utility model;
Fig. 2 is the circuit theory diagrams of field control unit of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
With reference to Fig. 1, the utility model is a modular organization, comprises the host computer 15 as monitoring unit, the field control unit 14 (present embodiment can adopt 3 field control units 14) that at least one is in parallel.Each field control unit 14 comprises: formation voltage transmitting module 1, forming current transmitting module 2, change into battery temperature transmitting module 3, change into spin manifold temperature transmitting module 4, digital signal processor (DSP) 5, control Driver Circuit 6, memory module 7, CAN bus communication module 8 and D/A converter 9, DC/DC modular converter 10, discharge module 11, protection module 12 (as preventing to be changed into battery excess current, superpotential, the too high protection module of temperature).Its mutual annexation (referring to accompanying drawing 2) is: described formation voltage transmitting module 1, forming current transmitting module 2, change into battery temperature transmitting module 3 and change into the input end of spin manifold temperature transmitting module 4 from changing into battery 13, output signal is the input signal of protection module 12, and link to each other with the A/D pin of digital signal processor 5 respectively, protection module 12 links to each other with the A/D input pin of digital signal processor 5, the synchronous serial bus of digital signal processor 5 links to each other with D/A converter 9, the output of D/A converter 9 is through control Driver Circuit 6 and DC/DC modular converter 10, discharge module 11 links to each other, the power supply input of discharge module 11 is connected to and changes into battery 13, and the output of DC/DC modular converter 10 is connected to and changes into battery 13; The CAN port of digital signal processor 5 links to each other with CAN bus communication module 8; The described charging circuit that changes into battery 13 is made of DC/DC modular converter 10, and its discharge circuit is made of discharge module 11.
Overall system is made of jointly host computer 15 and at least one field control unit 14, communicates by the CAN bus each other.Host computer 15 is made of ordinary PC, is responsible for the real-time monitoring and the parameter setting of system, and to battery 13 change into data and the operation history incident is carried out record, be used for SDA system data analysis and battery sorting.The processor adopting digital signal processor 5 of field control unit 14, receive the setup parameter of host computer 15 and it is stored in the memory module 7 (memory module of field control unit 14 7 form by EEPROM), field control unit 14 receives and carries out the instruction that host computer 15 is sent under working method, and the battery 13 that changes in the passage is changed into control.And the operational factor (electric current, voltage, temperature) of battery 13 is collected in the data-carrier store of digital signal processor 5 inside carry out digital filtering, quantities transforms, and sends to host computer 15 via the CAN bus then, show and store by host computer 15.
After field control unit 14 starts, after the digital signal processor 5 of each passage is set in parameter initialization in the memory module 7 according to host computer 15, just enter duty, in working order down, digital signal processor 5 will send the signal of module 1 and voltage transmission module 2 to carry out analog to digital conversion from electrorheological, carry out computing according to the working method that host computer 15 is set, produce the control output signal, through being sent to the control input end (under the discharge mode) of DC/DC modular converter 10 (under the charging modes) or discharge module 11 after the digital-to-analog conversion, thereby form the closed-loop control of battery forming current (voltage), wherein owing in charge circuit, used DC/DC modular converter 10, and DC/DC module 10 is a kind of Switching Power Supplies, thereby the energy loss when truly having saved charging in the circuit has also reduced the designing requirement of cooling system.
When the electric current of battery in service, voltage or (with) when temperature surpasses the limit value of setting of system; send warning message by protection module 12 to digital signal processor 5; digital signal processor 5 turn-offs the output (under the charging modes) of DC/DC modular converter 10 or the output (under the discharge mode) of discharge module 11 rapidly by interrupt service routine, thereby prevents to change into the accidental damage or the blast of battery 13.
Lithium battery changed into several working ways, as constant-current charge, constant-voltage charge, leave standstill and constant-current discharge etc., control by digital signal processor 5.Field control unit 14 has been set up different protected modes by digital signal processor 5 according to various working methods in software: during constant-current charge, formation voltage is carried out real time monitoring, when voltage reaches setting, just stop constant-current charge, change constant-voltage charge or other mode of operation over to; During constant-voltage charge, forming current is carried out real time monitoring, after electric current is reduced to host computer setting value given in advance, stop constant-voltage charge, change next mode of operation over to, prevent overcharging of battery; During constant-current discharge, formation voltage is carried out real time monitoring, when voltage drops to preset value, then stop discharge, prevent the overdischarge of battery 13.
No matter under any working method, digital signal processor 5 is all gathered in real time to the parameter of battery 13, according to the requirement of host computer 15 by CAN communication interface modules 8 in real time with these data transmission to host computer 15.
The described formation voltage transmitting module 1 of present embodiment, forming current transmitting module 2, change into battery temperature transmitting module 3, change into spin manifold temperature transmitting module 4, control Driver Circuit 6 and protection module 12 all adopt chip operational amplifier OP-07; memory module 7 adopts storer X5045; CAN bus communication module 8 adopts CAN bus driver 82C250; and D/A converter 9 adopts DAC75 12; DC/DC modular converter 10 adopts V300B5C200A, and discharge module 11 adopts large power triode 2N5686.It is core that the utility model adopts brand-new high speed digital signal processor 5 (adopting the TMS320F2XX chip), has formed the flexible charging/discharging apparatus of high-performance high-level efficiency control in conjunction with novel DC/DC power module (DC-to-dc modular converter).
Adopt the utility model to carry out freely being provided with according to the chemical synthesis technology of battery production producer, formation process, number of times, time are set, the charging and discharging of random order and leaving standstill the stage, in the charging stage, can realize constant-current charge, constant-voltage charge, the cut-off condition of charging comprises variation delta V/ Δ T in the unit interval of duration of charging, battery voltage limit, charging current, cell voltage, charging capacity or the like, can realize constant-current discharge, constant voltage discharge in discharge regime, the cut-off condition of discharge comprises discharge time, cell voltage, discharge capacity or the like.
The utility model not only can be realized each battery cell is controlled automatically by the CAN bus interface, and the systematic parameter of setting and chemical synthesis technology can be permanently stored among the EEPROM automatically, but also can utilize the CAN bus to realize team control.Monitoring when realizing multiple devices by a host computer, in whole formation process, can accomplish charging and discharging currents, cell voltage, battery temperature, housing temperature, charge are monitored in real time, can draw real-time curve of current/voltage or the like.This device is in particular extensive lithium battery Test Design, possesses security feature and also is fit to the other types battery testing simultaneously.For the lithium battery test provides safeguard protection, being to discharge and recharge provides voltage clamp and current protection, and battery overcharges or over-discharge can with regard to not occurring like this.
Claims (4)
1. a lithium dynamical battery changes into measure and control device, it is characterized in that: comprise host computer (15) and at least one field control unit (14), adopt CAN Bus to communicate between the two; Wherein field control unit (14) is by changing into transmitting module, digital signal processor (5), control Driver Circuit (6), memory module (7), CAN bus communication module (8) and D/A converter (9), DC/DC modular converter (10), discharge module (11), protection module (12) is formed, wherein with described digital signal processor (5) as core processor, the input end that changes into transmitting module is from changing into battery (13), output signal is the input signal of protection module (12), and link to each other with digital signal processor (5), protection module (12) links to each other with the A/D input pin of digital signal processor (5), the synchronous serial bus of digital signal processor (5) links to each other with D/A converter (9), the output of D/A converter (9) is through control Driver Circuit (6) and DC/DC modular converter (10), discharge module (11) links to each other, the power supply input signal of discharge module (11) is connected to and changes into battery (13), and the output of DC/DC modular converter (10) is connected to and changes into battery (13); The CAN port of digital signal processor (5) links to each other with CAN bus communication module (8).
2. change into measure and control device by the described dynamic lithium battery of claim 1; it is characterized in that: described change into transmitting module by formation voltage transmitting module (1), forming current transmitting module (2), change into battery temperature transmitting module (3) and change into spin manifold temperature transmitting module (4) and form; input end is respectively from changing into battery (13); output signal is respectively the input signal of protection module (12), and links to each other with the A/D pin of digital signal processor (5).
3. change into measure and control device by the described dynamic lithium battery of claim 1, it is characterized in that: when having a plurality of field control units (14), be in parallel with the connected mode of host computer (15).
4. change into measure and control device by the described dynamic lithium battery of claim 1, it is characterized in that: the described charging circuit that changes into battery (13) is made of DC/DC modular converter (10), and described discharge circuit is made of discharge module (11).
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|---|---|---|---|
| CN 200420030172 CN2672668Y (en) | 2004-01-17 | 2004-01-17 | Lithium power battery formation measuring and controlling device |
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|---|---|---|---|
| CN 200420030172 CN2672668Y (en) | 2004-01-17 | 2004-01-17 | Lithium power battery formation measuring and controlling device |
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