CN1124493C - Chargeable cell test loop contact resistance monitoring method - Google Patents
Chargeable cell test loop contact resistance monitoring method Download PDFInfo
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- CN1124493C CN1124493C CN 00117191 CN00117191A CN1124493C CN 1124493 C CN1124493 C CN 1124493C CN 00117191 CN00117191 CN 00117191 CN 00117191 A CN00117191 A CN 00117191A CN 1124493 C CN1124493 C CN 1124493C
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- amplifier
- current
- test loop
- contact resistance
- resistor
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Abstract
The present invention relates to a method for monitoring a contact resistor of a test loop of a rechargeable battery, which belongs to the technical field of automatic detection. The present invention is characterized in that a battery monitor amplifier is adopted; the negative input end of the battery monitor amplifier is connected with a current sampling resistor R1 and a lower battery clamp through a resistor R2; the positive input end of the amplifier is connected with a threshold current setting signal VX through a resistor R3; the output end of the amplifier is connected with a power supply source and an amplifier end 7 through an indicating light-emitting diode (LED) D and a resistor R4; an amplifier end 4 is connected with the other end of the power supply source; one end of the resistor R1 is connected to a constant current source or a constant voltage source HL, and the other end is connected to the lower battery clamp and the negative input end of the amplifier.
Description
Affiliated technical field
The present invention relates to detection method, particularly a kind of detection method that is used for the chargeable cell test loop contact resistance.
Background technology
Contact resistance in the chargeable cell test loop mainly results between battery and the anchor clamps, existing chargeable cell test equipment does not have method to monitor contact resistance in the test loop, because the contact resistance in the test loop exists, what can seriously influence rechargeable battery changes into or detects effect between battery and the anchor clamps.
Summary of the invention
The object of the invention provides the detection method of contact resistance in a kind of chargeable cell test loop, can indicate the contact resistance situation between battery and the anchor clamps legibly, so that operating personnel handle, assurance changes into, the accurate realization of capacity check operation.
For achieving the above object, the present invention can realize by following technical measures: be connected in series current sampling resistor in chargeable cell test loop, electric current on the current sampling resistor is inserted current sense amplifier, and compare with the threshold current settings signal of another input end of current sense amplifier, trigger being connected the indication light emitting diode that the current sense amplifier output terminal is used to reflect the contact resistance situation again by the output signal after the comparison.When the electric current on the sample resistance was big, the contact resistance in the rechargeable battery test loop was little, and current sense amplifier output does not trigger the indication lumination of light emitting diode; Electric current on sample resistance hour, the contact resistance in the rechargeable battery test loop is big, and current sense amplifier output triggers the indication lumination of light emitting diode.
Advantage of the present invention is: 1. can charge and discharge the contact resistance that the loose contact degree in loop produced to battery and detect, effect is directly perceived, convenient, guarantees changing into and the accurate realization of capacity check operation of rechargeable battery; 2. be easy to expanded application, practical especially to rechargeable battery detection, the formation device that has numerous loops; 3. the monitoring current threshold value can be regulated and be that numerous loops are public, satisfies the monitoring needs of different model battery to different threshold electric currents; 4. it is cheap to utilize the present invention can be made into, the pick-up unit that is easy to produce in batches.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1-principle of the invention block scheme, 1 expression current sampling resistor R among the figure
1, 2 expression current monitoring amplifier A, 3 expression rechargeable battery E, 4 expression indication light emitting diode D.
Fig. 2-example elementary diagram
Fig. 3-sample resistance R
1With parallel resistance W connection layout
Embodiment
As Fig. 1, Fig. 2, shown in Figure 3, in chargeable cell test loop, be connected in series current sampling resistor, electric current on the current sampling resistor is inserted current sense amplifier, and compare with the threshold current settings signal of another input end of current sense amplifier, trigger being connected the indication light emitting diode that the current sense amplifier output terminal is used to reflect the contact resistance situation again by the output signal after the comparison.Said method can be by adopting circuit shown in Figure 2, comprising current monitoring amplifier A, current sampling resistor R
1, indication light emitting diode D, threshold current settings signal V
X, rechargeable battery E etc.The negative input end 2 of battery detection amplifier A passes through resistance R
2With current sampling resistor R
1And the connection of battery E lower clamp, the positive input terminal 3 of amplifier passes through resistance R
3With threshold current settings signal V
XConnect, the output terminal 6 of amplifier is by indication light emitting diode D, resistance R
4Be connected with power supply and amplifier power supply input end 7.Another power input 4 of amplifier is connected current sampling resistor R with the power supply other end
1One end is to be connected to constant-current supply or constant voltage source HL, and the other end is connected to battery E lower clamp and amplifier negative input end; At current sampling resistor R
1Two ends also can and meet adjustable resistance W1.When the electric current on the sample resistance was big, the contact resistance in the rechargeable battery test loop was little, current sense amplifier output high level, and the indication light emitting diode is not by luminous; Electric current on sample resistance hour, the contact resistance in the rechargeable battery test loop is big, the current sense amplifier output low level, the conducting of indication light emitting diode is luminous.
Above-mentioned current sampling resistor R
1Enough power must be arranged, for the electric current that battery charges and discharge, R
1Value generally get 1 Ω/5W, degree of accuracy is more than ± 0.5%, simultaneously R
1The current value that Ying Yuqi flow through becomes simple proportionate relationship, as every ampere of 1V/, so can use one and R
1Parallel resistor is to adjust the proportionate relationship of electric current and output voltage.R
4Value depend mainly on the magnitude of voltage of power supply, allow the indication light emitting diode D be foundation with value by the 8-12mA electric current.Current monitoring amplifier A can select the universal operational amplifier of any kind for use, and the present invention selects 741 for use, and its power supply is directly provided by power supply DC.
Claims (2)
1, the detection method of contact resistance in a kind of chargeable cell test loop, it is characterized in that: in chargeable cell test loop, be connected in series current sampling resistor, electric current on the current sampling resistor is inserted current sense amplifier, and compare with the threshold current settings signal of another input end of current sense amplifier, trigger being connected the indication light emitting diode that the current sense amplifier output terminal is used to reflect the contact resistance situation again by the output signal after the comparison.
2, the detection method of contact resistance in the chargeable cell test loop according to claim 1 is characterized in that: the two ends at current sampling resistor (R1) also can and connect adjustable resistance (W1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00117191 CN1124493C (en) | 2000-06-20 | 2000-06-20 | Chargeable cell test loop contact resistance monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00117191 CN1124493C (en) | 2000-06-20 | 2000-06-20 | Chargeable cell test loop contact resistance monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1329255A CN1329255A (en) | 2002-01-02 |
| CN1124493C true CN1124493C (en) | 2003-10-15 |
Family
ID=4586579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00117191 Expired - Fee Related CN1124493C (en) | 2000-06-20 | 2000-06-20 | Chargeable cell test loop contact resistance monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1124493C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696991B (en) * | 2009-10-14 | 2013-08-28 | 苏州阿特斯阳光电力科技有限公司 | Method and device for detecting contact resistance of probe |
| CN101713794B (en) * | 2009-10-23 | 2012-09-05 | 广州蓝奇电子实业有限公司 | Method for detecting poor contact of battery voltage testing terminals |
| CN107817374A (en) * | 2012-04-19 | 2018-03-20 | 南京中兴新软件有限责任公司 | A kind of method and device for the operating current and dump energy for detecting electric terminal |
| KR101397887B1 (en) * | 2013-05-15 | 2014-05-20 | 주식회사 엘지씨엔에스 | Monitoring device and method of battery contact point at the charging/discharging system with serial connected batteries |
| CN105550092A (en) * | 2015-12-07 | 2016-05-04 | 联想(北京)有限公司 | Information processing method and electronic device |
-
2000
- 2000-06-20 CN CN 00117191 patent/CN1124493C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1329255A (en) | 2002-01-02 |
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