CN202649290U - Lithium battery protection board over-current value detection module - Google Patents
Lithium battery protection board over-current value detection module Download PDFInfo
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- CN202649290U CN202649290U CN 201120528449 CN201120528449U CN202649290U CN 202649290 U CN202649290 U CN 202649290U CN 201120528449 CN201120528449 CN 201120528449 CN 201120528449 U CN201120528449 U CN 201120528449U CN 202649290 U CN202649290 U CN 202649290U
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- lithium battery
- control module
- protection board
- battery protection
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Abstract
The utility model discloses a lithium battery protection board over-current value detection module comprising an input impedance module, a signal modulating and amplifying module, a sampling maintaining module, an output drive module, a main control module, a host computer, a lithium battery protection board and a constant current control module. An output end of the main control module is respectively connected with the sampling maintaining module and the constant current control module. An input end of the sampling maintaining module is connected with an output end of the signal modulating and amplifying module. An output end of the sampling maintaining module is connected with the output drive module which is connected with the main control module which is connected with the host computer. The constant current control module is connected with an input end of the signal modulating and amplifying module through the input impedance module. The constant current control module is connected with the lithium battery protection board. The lithium battery protection board over-current value detection module has the following advantages that: (1) a lithium battery protection board over-current threshold value can be accurately tested; (2) fully digital design is carried out, a man-machine interface is designed, and operability is raised.
Description
Technical field
The utility model relates to technical field of lithium batteries, particularly a kind of lithium battery protection board overcurrent value detection module.
Background technology
At present, lithium battery protection board can guarantee that when being full of electricity the voltage differences between each cell (generally ± 20mV), realizes the equilibrium of each cell of electric battery, effectively improved the charging effect under the serial connection charge mode less than setting value.Detect simultaneously the overvoltage of each cell in the electric battery, under-voltage, overcurrent, short circuit, over-temperature condition, protection also prolongs battery.Under-voltage protection makes each single battery avoid battery to damage because of overdischarge when discharge is used.The overcurrent threshold value of lithium battery protection board has considerable influence for reliability, the consistance of product, and have following defective: 1, homogeneity of product is poor, affects system reliability; 2, the meeting on the low side of overcurrent threshold value causes system misoperation, and higher meeting causes the system protection miopragia; Existing means are by electronic load, set constant current value and test, and need constantly to change setting value and estimate accurately overcurrent value, and efficient is very low, has reduced production efficiency.
The utility model content
Technical problem to be solved in the utility model is for the deficiencies in the prior art, to provide a kind of lithium battery protection board overcurrent value detection module, to reach the purpose of accurate test lithium battery protection board overcurrent threshold value.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of lithium battery protection board overcurrent value detection module, comprise the input impedance module, the signal modulator and amplifier module, sampling keeps module, the output driver module, main control module, host computer, lithium battery protection board and constant-current control module, the output terminal of described main control module keeps module and constant-current control module to be connected with sampling respectively, described sampling keeps the input end of module to be connected with the output terminal of signal modulator and amplifier module, sampling keeps the output terminal of module to be connected with the output driver module, described output driver module is connected with main control module, described main control module is connected with host computer, described constant-current control module is connected by the input end of input impedance module with the signal modulator and amplifier module, and described constant-current control module is connected with lithium battery protection board;
Described constant-current control module is used for sending pulse signal control field effect transistor according to main control module, and negative feedback is read and detected resistance formation constant current, by sample resistance current value is converted into voltage signal;
Described input impedance module is used for input signal and signal modulator and amplifier module are kept apart;
Described signal modulator and amplifier module is used for input voltage signal is amplified;
Described sampling keeps module, and the input voltage signal that is used for amplifying keeps voltage to capacitor charge and discharge;
Described output driver module is used for improving input impedance;
Described main control module is used for when the lithium battery protection board overcurrent protection, and during cutoff circuit, read signal also calculates the overcurrent value of lithium battery protection board, is shown on the host computer.
Described main control module adopts Micro-processor MCV, and its chip model is STM32F103VET6.
Described constant-current control module comprises power inductance L1, field effect transistor Q1 and the inspection leakage resistance R1 that connects successively; the grid of field effect transistor Q1 is connected with the Micro-processor MCV output terminal; drain electrode is connected with inspection leakage resistance R1; source electrode is connected with inductance L 1; described lithium battery protection board one end is connected with inductance L 1 by sample resistance R2, switch S 1 successively, and the lithium battery protection board other end is connected with inspection leakage resistance R1 by load.
Described sampling keeps module to comprise capacitor C 1, keyswitch S2, field effect transistor Q2, described capacitor C 1 one ends are connected with the operational amplifier output terminal of signal modulator and amplifier module, capacitor C 1 other end ground connection, described keyswitch S2 one end connects by resistance R 3 and operational amplifier output terminal, other end ground connection, the grounded-grid of described field effect transistor Q2, drain electrode is connected with operational amplifier output terminal by resistance R 4, and source electrode is connected with the Micro-processor MCV output terminal by resistance R 5.
The utility model adopts said structure, has the following advantages: 1, can accurately test lithium battery protection board overcurrent threshold value; 2, carry out the total digitalization design, and designed man-machine interface, improved operability; 3, improve production efficient.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail;
Fig. 1 is logical organization block diagram of the present utility model;
Fig. 2 is circuit structure diagram of the present utility model;
In Fig. 1～Fig. 2,1, the input impedance module; 2, signal modulator and amplifier module; 3, sampling keeps module; 4, output driver module; 5, main control module; 6, host computer; 7, lithium battery protection board; 8, constant-current control module; 9, load.
Embodiment
Such as Fig. 1～a kind of lithium battery protection board overcurrent value detection module shown in Figure 2; comprise that input impedance module 1, signal modulator and amplifier module 2, sampling keep module 3, output driver module 4, main control module 5, host computer 6, lithium battery protection board 7 and constant-current control module 8; main control module 5 adopts Micro-processor MCV, and its chip model is STM32F103VET6.The output terminal of main control module 5 keeps module 3 and constant-current control module 8 to be connected with sampling respectively, sampling keeps the input end of module 3 to be connected with the output terminal of signal modulator and amplifier module 2, sampling keeps the output terminal of module 3 to be connected with output driver module 4, output driver module 4 is connected with main control module 5, main control module 5 is connected with host computer 6, constant-current control module 8 is connected by the input end of input impedance module 1 with signal modulator and amplifier module 2, and constant-current control module 8 is connected with lithium battery protection board 7;
Constant-current control module 8 is used for sending pulse signal control field effect transistor according to main control module, and negative feedback is read and detected resistance formation constant current, by sample resistance current value is converted into voltage signal;
Signal modulator and amplifier module 2 is used for input voltage signal is amplified;
Sampling keeps module 3, and the input voltage signal that is used for amplifying keeps voltage to capacitor charge and discharge;
Constant-current control module 8 comprises power inductance L1, field effect transistor Q1 and the inspection leakage resistance R1 that connects successively; the grid of field effect transistor Q1 is connected with the Micro-processor MCV output terminal; drain electrode is connected with inspection leakage resistance R1; source electrode is connected with inductance L 1; described lithium battery protection board one end is connected with inductance L 1 by sample resistance R2, switch S 1 successively, and the lithium battery protection board other end is connected with inspection leakage resistance R1 by load 9.
Sampling keeps module 3 to comprise capacitor C 1, keyswitch S2, field effect transistor Q2, described capacitor C 1 one ends are connected with the operational amplifier output terminal of signal modulator and amplifier module, capacitor C 1 other end ground connection, described keyswitch S2 one end connects by resistance R 3 and operational amplifier output terminal, other end ground connection, the grounded-grid of described field effect transistor Q2, drain electrode is connected with operational amplifier output terminal by resistance R 4, and source electrode is connected with the Micro-processor MCV output terminal by resistance R 5.Signal modulator and amplifier module 2 adopts operational amplifier, and its inverting input is connected with its output terminal by resistance R 8.Input impedance module 1 also comprises operational amplifier, and its output terminal is connected with the in-phase input end of the operational amplifier of signal modulator and amplifier module 2 by resistance R 6, diode, resistance R 7 successively,
The detection method of lithium battery protection board overcurrent value detection module may further comprise the steps:
A) host computer arranges the testing current scope, closed-loop path switch S 1, start-up system;
B) main control module sends pulse signal control field effect transistor Q1, and negative feedback is read and detected resistance formation constant current, and by improving pulse width modulation duty, current value increases gradually, and R2 is converted into voltage signal with current value by sample resistance; Through the input impedance module input signal and late-class circuit are kept apart;
C) the signal modulator and amplifier module amplifies input voltage signal, can amplify 10 times, so that the late-class circuit signal is processed.Signal is by keeping capacitor C 1 charging in the module to sampling after amplifying, keep voltage, electric current is constantly becoming in the large process, record maximal value, until the lithium battery protection board overcurrent protection, cutoff circuit, after Micro-processor MCV finds that the loop disconnects, read signal, and calculate the overcurrent value of lithium battery protection board feeds back to host computer and shows;
D) will sample and keep capacitor discharge in the module.Can pass through micro treatment module MCU conducting field effect transistor Q2, the tele-release of capacitor C 1 is fallen to prepare to measure next time, also can use manual keyswitch S2 to capacitor C 1 discharge.
The above has carried out exemplary description to the utility model by reference to the accompanying drawings; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted the technical solution of the utility model to carry out; or directly apply to other occasion without improvement, all within protection domain of the present utility model.
Claims (4)
1. lithium battery protection board overcurrent value detection module, it is characterized in that: comprise input impedance module (1), signal modulator and amplifier module (2), sampling keeps module (3), output driver module (4), main control module (5), host computer (6), lithium battery protection board (7) and constant-current control module (8), the output terminal of described main control module (5) keeps module (3) and constant-current control module (8) to be connected with sampling respectively, described sampling keeps the input end of module (3) to be connected with the output terminal of signal modulator and amplifier module (2), sampling keeps the output terminal of module (3) to be connected with output driver module (4), described output driver module (4) is connected with main control module (5), described main control module (5) is connected with host computer (6), described constant-current control module (8) is connected by the input end of input impedance module (1) with signal modulator and amplifier module (2), and described constant-current control module (8) is connected with lithium battery protection board (7);
Described constant-current control module (8) is used for sending pulse signal control field effect transistor according to main control module, and negative feedback is read and detected resistance formation constant current, by sample resistance current value is converted into voltage signal;
Described input impedance module (1) is used for input signal and signal modulator and amplifier module are kept apart;
Described signal modulator and amplifier module (2) is used for input voltage signal is amplified;
Described sampling keeps module (3), and the input voltage signal that is used for amplifying keeps voltage to capacitor charge and discharge;
Described output driver module (4) is used for improving input impedance;
Described main control module (5) is used for when the lithium battery protection board overcurrent protection, and during cutoff circuit, read signal also calculates the overcurrent value of lithium battery protection board, is shown on the host computer.
2. a kind of lithium battery protection board overcurrent value detection module according to claim 1 is characterized in that: described main control module (5) adopts Micro-processor MCV, and its chip model is STM32F103VET6.
3. a kind of lithium battery protection board overcurrent value detection module according to claim 1; it is characterized in that: described constant-current control module (8) comprises the power inductance (L1) that connects successively; field effect transistor (Q1) and inspection leakage resistance (R1); the grid of field effect transistor (Q1) is connected with the Micro-processor MCV output terminal; drain electrode is connected with inspection leakage resistance (R1); source electrode is connected with inductance (L1); described lithium battery protection board one end is successively by sample resistance (R2); switch (S1) is connected with inductance (L1), and the lithium battery protection board other end is connected with inspection leakage resistance (R1) by load (9).
4. a kind of lithium battery protection board overcurrent value detection module according to claim 1 and 2; it is characterized in that: described sampling keeps module (3) to comprise electric capacity (C1); keyswitch (S2); field effect transistor (Q2); described electric capacity (C1) end is connected with the operational amplifier output terminal of signal modulator and amplifier module; electric capacity (C1) other end ground connection; described keyswitch (S2) end connects by resistance (R3) and operational amplifier output terminal; other end ground connection; the grounded-grid of described field effect transistor (Q2); drain electrode is connected with operational amplifier output terminal by resistance (R4), and source electrode is connected with the Micro-processor MCV output terminal by resistance (R5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120528449 CN202649290U (en) | 2011-12-16 | 2011-12-16 | Lithium battery protection board over-current value detection module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201120528449 CN202649290U (en) | 2011-12-16 | 2011-12-16 | Lithium battery protection board over-current value detection module |
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| CN202649290U true CN202649290U (en) | 2013-01-02 |
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| CN 201120528449 Expired - Fee Related CN202649290U (en) | 2011-12-16 | 2011-12-16 | Lithium battery protection board over-current value detection module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435826A (en) * | 2011-12-16 | 2012-05-02 | 芜湖天元汽车电子有限公司 | Detection module for over-current value of protecting plate of lithium battery and detection method thereof |
| CN105301478A (en) * | 2015-11-12 | 2016-02-03 | 孝感量子机电科技有限公司 | Detection device and detection method of 3.7V cell single-string protection plate |
| CN108152567A (en) * | 2017-12-24 | 2018-06-12 | 佛山中锦微电科技有限公司 | Power driving circuit overcurrent protection function lossless detection method and over-current detection module |
-
2011
- 2011-12-16 CN CN 201120528449 patent/CN202649290U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435826A (en) * | 2011-12-16 | 2012-05-02 | 芜湖天元汽车电子有限公司 | Detection module for over-current value of protecting plate of lithium battery and detection method thereof |
| CN105301478A (en) * | 2015-11-12 | 2016-02-03 | 孝感量子机电科技有限公司 | Detection device and detection method of 3.7V cell single-string protection plate |
| CN105301478B (en) * | 2015-11-12 | 2018-02-06 | 孝感量子机电科技有限公司 | A kind of detection means and detection method of 3.7V batteries list string protection board |
| CN108152567A (en) * | 2017-12-24 | 2018-06-12 | 佛山中锦微电科技有限公司 | Power driving circuit overcurrent protection function lossless detection method and over-current detection module |
| CN108152567B (en) * | 2017-12-24 | 2020-04-14 | 佛山中锦微电科技有限公司 | Nondestructive testing method for overcurrent protection function of power driving circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20151216 |
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| EXPY | Termination of patent right or utility model |