CN205157744U - Quick detecting system of lithium cell self discharge - Google Patents
Quick detecting system of lithium cell self discharge Download PDFInfo
- Publication number
- CN205157744U CN205157744U CN201520930888.9U CN201520930888U CN205157744U CN 205157744 U CN205157744 U CN 205157744U CN 201520930888 U CN201520930888 U CN 201520930888U CN 205157744 U CN205157744 U CN 205157744U
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- module
- self discharge
- control module
- battery
- temperature control
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- Secondary Cells (AREA)
Abstract
The utility model relates to a quick detecting system of lithium cell self discharge belongs to the electronic equipment field. The utility model discloses a control module, AD conversion module, from discharge detection module, button setting module, liquid crystal display module and temperature control module. Control module, AD conversion module and couple together according to the order from the discharge detection module also can form loop configuration for control module with of survey data feedback from the discharge detection module, are connected from the discharge detection module and the both ends of survey battery, and among temperature control module was arranged in to the battery of surveying, button setting module and conversion module 0 were all continuous with control module. The utility model discloses the size is flowed in self discharge that can the real -time detection battery, and the required time is also short than the traditional approach a lot, only needs the settling time of a day or several days, just can record the real -time self discharge stream of electric core at arbitrary magnitude of voltage. In addition, temperature control module enables whole testing process temperature and keeps in the room temperature, makes measuring result more accurate.
Description
Technical field
The utility model belongs to electronic device field, particularly relates to a kind of lithium battery self discharge rapid detection system.
Background technology
Along with the aggravation that global energy is in short supply, New Energy Industry quietly rises, and the secondary cell technology with better application prospect is fallen over each other research.Lithium battery is widely used on various instrument and electric automobile as energy resource system because of characteristics such as itself are pollution-free, specific energy is high, have extended cycle life.And the existence of lithium battery self-discharge phenomenon not only causes the loss of the energy of battery own, also the lithium battery group life-span can be caused to reduce because of the inconsistency of self discharge between each battery, capacity is decayed rapidly, causes the prediction of battery management system (BMS) to battery charge state (SOC) to occur comparatively big error.
The self discharge detection method of current employing is that long-time open circuit shelves method, being opened a way by battery to shelve 7 days or 28 days under high temperature or normal temperature, judging its self-discharge performance by measuring its discharge electricity amount to battery discharge to cut-off voltage.The method need to battery reach one month shelve detection, the time cycle is long, and influence factor is large, and accuracy is limited, and occupies more equipment and place for a long time, and Security of test is poor, is a large amount of wastes to manpower and financial resources.
Utility model content
The utility model is intended to solve an above-mentioned difficult problem, proposes a kind of lithium battery self discharge rapid detection system.
The utility model comprises control module, A/D modular converter, self discharge detection module, button setting module, LCD MODULE and temperature control modules.Control module, A/D modular converter and self discharge detection module couple together in order, surveyed data feedback is formed closed loop configuration to control module by self discharge detection module, self discharge detection module is connected with the two ends of surveyed battery, survey battery and be placed among temperature control modules, button setting module is all connected with control module with LCD MODULE.
What described control module adopted is MSP430F149 singlechip chip.
What A/D modular converter adopted is DAC1220 chip.
Temperature control modules adopts 40 power to be the 1K resistance of 1W, provides stationary temperature in every 20 modes in parallel as heater members by being surveyed battery.
Beneficial effect:
1, the utility model can detect the self discharge stream size of battery in real time, required time also comparatively open circuit to shelve method much short, only need the stabilization time of one day or several days, just can record the real-time self discharge stream of battery core at any voltage value.
2, the temperature control modules that the utility model comprises can make whole testing process temperature remain on room temperature, makes measurement result more accurate.
Accompanying drawing explanation
Fig. 1 is overall system architecture figure.
Fig. 2 is A/D modular converter and control module connection layout.
Fig. 3 is self discharge detection module circuit diagram.
Fig. 4 is temperature control modules circuit diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1: the utility model comprises control module 1, A/D modular converter 2, self discharge detection module 3, button setting module 4, LCD MODULE 5 and temperature control modules 6.Control module 1, A/D modular converter 2 and self discharge detection module 3 couple together in order, surveyed data feedback is formed closed loop configuration to control module 1 by self discharge detection module 3, self discharge detection module 3 is connected with the two ends of surveyed battery, survey battery and be placed among temperature control modules 6, button setting module 4 is all connected 1 with control module with LCD MODULE 5.
What control module 1 adopted is MSP430F149 singlechip chip, and the major function of control module is the analyzing and processing to data, then sends corresponding instruction to each module, realizes key scan, data processing and the function such as display, D/A conversion.MSP430F149 chip comprises the A/D converter of 8 Channel 12-Bit 200kbps, carrying sampling and keeping function, does not need to add other chips and can complete collection to cell voltage and A/D conversion work.
What A/D modular converter 2 adopted is DAC1220 chip, and the major function of A/D modular converter converts analog voltage to according to the digital quantity that control module is given, thus as the reference voltage of self discharge testing circuit.DAC1220 chip only needs 14,15,16 these three ports i.e. two clock ports to be connected with P1.0, P1.1, P1.2 of MSP430F149 singlechip chip respectively with a FPDP as shown in Figure 2, operates very easy.
Self discharge detection module 3 is cores of this system, and Main Function is the self-discharge current value measuring battery.Fig. 3 is the circuit diagram of self discharge detection module, signal DA_Vout is the reference voltage signal that D/A modular converter produces, whole circuit is using DA_Vout as system input quantity, cell voltage is as output quantity and feedback quantity, thus constitute a feedback system, cell voltage is stabilized in reference voltage the most at last, can be obtained the self-discharge current value of battery by the voltage measuring now sampling resistor SampleRes two ends.In order to prevent other loop electric discharges such as battery passing ratio operational amplifier, and causing self-discharge current value to ask for out of true, introducing optoelectronic switch, directly being carried out turning on and off control by the pin of single-chip microcomputer.
Button setting module 4 can allow user set reference voltage value.
LCD MODULE 5 can show current battery level value and reference voltage value.
The effect of temperature control modules 6 controls the temperature in present battery storehouse, makes it maintain steady temperature, to ensure the accuracy of detection of system.As shown in Figure 4, this module adopts 40 power to be the 1K resistance of 1W, every 20 modes in parallel are as heater members, operating voltage is 30V, the current value flowing through two groups of heating power electric resistance arrays is controlled by the turn-on and turn-off in various degree of two power field effect pipe IRF630, and the grid of IRF630 and source voltage U
gSsize be then used for controlling the degree of its conducting.U
gSvoltage range, between ± 20V, works as U
gStime larger, IRF630 conducting degree is comparatively large, and the electric current flowing through electric resistance array is also comparatively large, and power resistor now distributes more heats within the unit interval, and temperature can raise naturally; Otherwise, work as U
gStime less, in the power resistor unit interval, distribute heat diminishes, and so in system, temperature just can reduce.
The above; it is only preferred embodiment of the present utility model; not do any type of restriction to the utility model, those skilled in the art utilizes the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drops in protection domain of the present utility model.
Claims (4)
1. a lithium battery self discharge rapid detection system comprises control module, A/D modular converter, self discharge testing circuit, button setting module, LCD MODULE and temperature control modules, it is characterized in that: described control module, described A/D modular converter and described self discharge detection module couple together in order, surveyed data feedback forms closed loop configuration to described control module by described self discharge detection module, described self discharge detection module is connected with the two ends of surveyed battery, survey battery and be placed among described temperature control modules, described button setting module is all connected with described control module with described LCD MODULE.
2. a kind of lithium battery self discharge rapid detection system according to claim 1, is characterized in that: what described control module adopted is MSP430F149 singlechip chip.
3. a kind of lithium battery self discharge rapid detection system according to claim 1, is characterized in that: what described A/D modular converter adopted is DAC1220 chip.
4. a kind of lithium battery self discharge rapid detection system according to claim 1, is characterized in that: described temperature control modules adopts 40 power to be the 1K resistance of 1W, and every 20 modes in parallel are provided stationary temperature as heater members by surveying battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520930888.9U CN205157744U (en) | 2015-11-20 | 2015-11-20 | Quick detecting system of lithium cell self discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520930888.9U CN205157744U (en) | 2015-11-20 | 2015-11-20 | Quick detecting system of lithium cell self discharge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205157744U true CN205157744U (en) | 2016-04-13 |
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ID=55693423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520930888.9U Expired - Fee Related CN205157744U (en) | 2015-11-20 | 2015-11-20 | Quick detecting system of lithium cell self discharge |
Country Status (1)
| Country | Link |
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| CN (1) | CN205157744U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738832A (en) * | 2016-04-27 | 2016-07-06 | 黑龙江省计量检定测试院 | Storage battery low-temperature characteristic tester |
| CN108363013A (en) * | 2018-01-25 | 2018-08-03 | 湖南威威胜新能源技术有限公司 | A kind of self discharge detection method of nickle cobalt lithium manganate battery |
| CN109342957A (en) * | 2018-09-26 | 2019-02-15 | 合肥国轩高科动力能源有限公司 | Method for detecting fault battery in lithium ion battery self-discharge large parallel module |
-
2015
- 2015-11-20 CN CN201520930888.9U patent/CN205157744U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105738832A (en) * | 2016-04-27 | 2016-07-06 | 黑龙江省计量检定测试院 | Storage battery low-temperature characteristic tester |
| CN108363013A (en) * | 2018-01-25 | 2018-08-03 | 湖南威威胜新能源技术有限公司 | A kind of self discharge detection method of nickle cobalt lithium manganate battery |
| CN109342957A (en) * | 2018-09-26 | 2019-02-15 | 合肥国轩高科动力能源有限公司 | Method for detecting fault battery in lithium ion battery self-discharge large parallel module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160413 Termination date: 20171120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |