CN203849385U - Electric quantity monitor circuit of electric vehicle - Google Patents
Electric quantity monitor circuit of electric vehicle Download PDFInfo
- Publication number
- CN203849385U CN203849385U CN201420238976.8U CN201420238976U CN203849385U CN 203849385 U CN203849385 U CN 203849385U CN 201420238976 U CN201420238976 U CN 201420238976U CN 203849385 U CN203849385 U CN 203849385U
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- battery
- master controller
- monitoring chip
- battery monitoring
- chip
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Abstract
An electric quantity monitor circuit of an electric vehicle comprises a battery, a sampling resistor, a battery monitoring chip, a master controller, a display unit and a peripheral circuit. The battery monitoring chip is a DS2762 chip. The master controller is a DSP (Digital Signal Processor). The sampling resistor is connected with the battery in series. Two ends of the sampling resistor are connected with an inductive resistor connecting end and a grounding end of the battery monitoring chip respectively. A data input/output end of the battery monitoring chip is connected with the master controller through a current-limiting resistor. The output of the master controller is connected with a display unit circuit. A charging protection end and a discharging protection end of the battery monitoring chip are connected with a positive output end of the battery through an MOS (Metal Oxide Semiconductor) and a protection resistor respectively. With the adoption of the abovementioned technical scheme, a lithium battery can be protected in states of overvoltage, overcurrent and short circuit, real-time voltage and electric quantity of the battery can be read with the cooperation of the master controller, and a high expanding property is achieved.
Description
Technical field
The utility model relates to a kind of electric quantity monitoring circuit, particularly a kind of electric automobile electric quantity monitoring circuit.
Background technology
Up-to-date electric automobile mostly adopts lithium battery to drive at present, and its working time is directly relevant to the distance travelled of electric automobile, and the distance travelled that extends electric automobile just need to increase the service efficiency of capacity or the increase battery of battery.Good electric automobile electric quantity monitoring system is the prerequisite that increases battery availability factor, but because the voltage of lithium battery and dump energy and working time are not linear relationship.This has just caused difficulty for the design of electric quantity monitoring circuit.
Utility model content
Goal of the invention of the present utility model is a kind of simple in structure, dependable performance of design, the accurate electric automobile electric quantity monitoring of measurement circuit, and its concrete technical scheme is:
A kind of electric automobile electric quantity monitoring circuit, comprise battery, sampling resistor, battery monitoring chip, master controller, display section and peripheral circuit, wherein battery monitoring chip is DS2762 chip, master controller is DSP, sampling resistor is connected with battery, sampling resistor two ends connect respectively inductive reactance link and the earth terminal of battery monitoring chip, the data I/O of battery monitoring chip connects master controller by current-limiting resistance, master controller output connects display section circuit, the charge protection end of battery monitoring chip is connected respectively the cathode output end of battery with discharge prevention end with protective resistance by MOS.
Adopt technique scheme, can protect the overvoltage of lithium battery, overcurrent short-circuit condition, coordinate master controller to read real-time voltage, the electric weight of battery, expansion is strong.
Accompanying drawing explanation
Fig. 1 electric automobile electric quantity monitoring circuit figure.
Embodiment
The embodiment setting forth below represents and allows those skilled in the art to put into practice necessary information of the present utility model, and illustrates and put into practice best mode of the present utility model.Once read with reference to the accompanying drawings following description, those skilled in the art just will understand design of the present utility model and will recognize the application of these designs of not illustrating especially herein.Should be appreciated that these designs and application fall into the scope of disclosure and the accompanying claims book.
A kind of electric automobile electric quantity monitoring circuit with reference to shown in accompanying drawing 1, comprises battery, sampling resistor R
sns, battery monitoring chip, master controller, display section and peripheral circuit; wherein battery monitoring chip is DS2762 chip; this chip is the high-precision lithium battery battery monitoring chip that integrates data acquisition, information storage and safeguard protection that MAXIM company releases; master controller is DSP; also can be ARM chip, sampling resistor R
snsconnect with battery, sampling resistor R
snstwo ends connect respectively inductive reactance link SNS and the earth terminal VSS of battery monitoring chip, and the data I/O DQ of battery monitoring chip is by current-limiting resistance R
4connect master controller, master controller output connects display section circuit, and the charge protection end CC of battery monitoring chip and discharge prevention end DC are respectively by MOS and protective resistance R
1, R
2the cathode output end that connects battery, MOS adopts IRF3205MOS pipe.
Obviously, above-described embodiment is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And these belong to apparent variation that spirit of the present utility model extended out or change still among protection domain of the present utility model.
Claims (1)
1. an electric automobile electric quantity monitoring circuit, comprise battery, sampling resistor, battery monitoring chip, master controller, display section and peripheral circuit, it is characterized in that battery monitoring chip is DS2762 chip, master controller is DSP, sampling resistor is connected with battery, sampling resistor two ends connect respectively inductive reactance link and the earth terminal of battery monitoring chip, the data I/O of battery monitoring chip connects master controller by current-limiting resistance, master controller output connects display section circuit, the charge protection end of battery monitoring chip is connected respectively the cathode output end of battery with discharge prevention end with protective resistance by MOS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420238976.8U CN203849385U (en) | 2014-05-07 | 2014-05-07 | Electric quantity monitor circuit of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420238976.8U CN203849385U (en) | 2014-05-07 | 2014-05-07 | Electric quantity monitor circuit of electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203849385U true CN203849385U (en) | 2014-09-24 |
Family
ID=51562385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420238976.8U Expired - Fee Related CN203849385U (en) | 2014-05-07 | 2014-05-07 | Electric quantity monitor circuit of electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203849385U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459557A (en) * | 2014-12-08 | 2015-03-25 | 重庆桦哲科技有限公司 | Electric quantity detection circuit |
-
2014
- 2014-05-07 CN CN201420238976.8U patent/CN203849385U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459557A (en) * | 2014-12-08 | 2015-03-25 | 重庆桦哲科技有限公司 | Electric quantity detection circuit |
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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: 20140924 Termination date: 20150507 |
|
| EXPY | Termination of patent right or utility model |