CN210803581U - Battery insulation resistance detection circuit - Google Patents
Battery insulation resistance detection circuit Download PDFInfo
- Publication number
- CN210803581U CN210803581U CN201921162730.6U CN201921162730U CN210803581U CN 210803581 U CN210803581 U CN 210803581U CN 201921162730 U CN201921162730 U CN 201921162730U CN 210803581 U CN210803581 U CN 210803581U
- Authority
- CN
- China
- Prior art keywords
- battery
- unit
- sampling loop
- optocoupler
- detection circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a battery insulation resistance detection circuit, which comprises a sampling loop unit, a sampling circuit unit and a detection circuit unit, wherein the sampling loop unit is used for connecting a positive electrode and a negative electrode of a battery to form a loop; the switch unit is used for controlling the positive electrode and the negative electrode of the battery to be connected into the sampling loop unit; and the control unit is used for controlling the resistance values of the anode and the cathode of the battery connected to the sampling loop unit. The utility model discloses before the battery inserts the singlechip, through sampling loop unit to and the switch unit and the control unit who insert sampling loop unit, the resistance value that the control battery inserted the singlechip forms the unbalanced bridge, reaches under any operating mode, all can the accurate purpose of gathering just, the insulating resistance of burden.
Description
Technical Field
The utility model relates to a battery insulation resistance detection circuitry is applicable to the battery and detects technical field.
Background
At present, the research and development of electric automobiles in China are obviously advanced, and three key technologies initially have the capability development of supporting and developing the electric automobiles. The key core technologies of the electric automobile are three: the power battery, the motor and the control system are adopted. The power battery is the most critical, the performance index and the economic cost of the power battery determine the commercialization process of the electric automobile, the main performance of the power battery research and development product is at the international advanced level, the basic of the battery industry is strong, and some weak links need to be solved. Compared with international advanced levels such as Japan, America, Germany and the like, the overall level of the development of key technologies, key materials and products of the power battery in China is equivalent, the main performance indexes such as energy density, power density (the energy density and the power density refer to energy and power of unit weight, the former determines the endurance mileage and weight of the electric automobile, and the latter determines the dynamic property of the automobile) and the like of the power battery for automobiles with two types of nickel hydrogen and lithium ions and a plurality of series developed by enterprises such as Biddie, Lishen, Ratian and the like are in the international advanced level.
In the production process of the battery, the battery needs to be subjected to insulation detection, the existing detection circuit can only switch the resistance of the anode access sampling loop, although the scheme can detect the condition that the insulation resistance of the anode and the cathode simultaneously drops or the insulation resistance of the cathode drops, the insulation resistance value can not be accurately acquired when the insulation resistance of the anode drops.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a battery insulation resistance detection circuitry, when anodal insulation resistance descends, can the precision acquisition insulating resistance.
Realize the utility model discloses the technical solution of purpose does: a battery insulation resistance detection circuit comprising:
the sampling loop unit is used for connecting the anode and the cathode of the battery to form a loop;
the switch unit is used for controlling the positive electrode and the negative electrode of the battery to be connected into the sampling loop unit;
and the control unit is used for controlling the resistance values of the anode and the cathode of the battery connected to the sampling loop unit.
Further, the switch unit comprises an optical coupler U1 used for controlling the positive pole of the battery to be connected into the sampling loop unit, and an optical coupler U3 used for controlling the negative pole of the battery to be connected into the sampling loop unit, wherein the optical coupler U1 is connected with the optical coupler U3 in series.
Further, the sampling loop unit comprises a plurality of resistors which are sequentially connected in series and connected with the output end and the input end of the optical coupler U1, and a plurality of resistors which are sequentially connected in series and connected with the output end and the input end of the optical coupler U3.
Furthermore, the models of the optical couplers U1 and U3 are AQV258 optical couplers.
Further, the control unit is specifically an optical coupler U2, and the optical coupler U2 includes a first channel for controlling a resistor connected to an output end of the optical coupler U1 to be turned on or off, and a second channel for controlling a resistor connected to an output end of the optical coupler U3 to be turned on or off.
Further, the light coupler U2 is a light coupler with the model number of AQW 216.
Compared with the prior art, the utility model, it is showing the advantage and lies in: before the battery is connected with the single chip microcomputer, the resistance value of the battery connected with the single chip microcomputer is controlled through the sampling loop unit, the switch unit and the control unit which are connected with the sampling loop unit, a non-balance bridge is formed, and the purpose that the positive insulation resistance value and the negative insulation resistance value can be accurately collected under any working condition is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments of the present invention or the prior art are briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of the circuit structure of the present invention.
Detailed Description
With reference to fig. 1, a battery insulation resistance detection circuit includes a sampling loop unit, a switch unit and a control unit, where the switch unit includes an optical coupler U1 and an optical coupler U3, the models of U1 and U3 are AQV258, the sampling loop unit includes a round crystal resistor R1, R2, R3, R4, R5, R6, R8, R7, R10 and R9 connected in series in sequence, and is used for connecting positive and negative ends of a battery to form a loop, one end of R1 is connected to the positive electrode of the battery, one end of R2 is connected to a 6 port of the optical coupler U1, a 4 port of U1 is connected to one end of R3, U1 controls the positive electrode of the battery to be connected to the sampling loop unit, one end of R9 is connected to the negative electrode of the battery, one end of R10 is connected to a 4 port of the optical coupler U10, a 6 port of U10 is connected to one end of R10, and the negative;
the control unit is specifically an optical coupler U2 with the model number of AQW216, a 7 port of the optical coupler U2 is connected to one end of a resistor R4 connected with R5, an 8 port of the optical coupler U2 is connected to one end of a resistor R3 connected with U1, and the control unit is used for controlling the on and off of the resistors R3 and R4, namely controlling the resistance value of a battery anode connected to the sampling loop unit, a 5 port of the U2 is connected to one end of the resistor R7 connected with U3, and a 6 port of the U2 is connected to one end of the resistor R8 connected with R6, and is used for controlling the on and off of the resistors R7 and R8, namely controlling the resistance value of the battery. The cathode of the U2 is connected to the collector of the transistor Q1, and the base of Q1 is connected to the emitter through the resistor R17.
The R5 and the R6 are grounded after being connected, and the other ends of the R5 and the R6 are respectively connected to the single chip microcomputer.
The working process is as follows:
closing U1 and U3, connecting a positive electrode PACK + of the battery into R1, connecting a negative electrode PACK-of the battery into R9, wherein at the moment, R1, R2, R3, R4, R5, R6, R8, R7, R10 and R9 form a loop with the battery, then collecting voltages Vins + and Vins-of the positive electrode and the negative electrode of the battery by the singlechip, judging the magnitudes of the Vins + and the Vins-, marking as U1 'and U2', if Vins + > Vins-, closing a first channel (7 and 8 ports) of U2, opening a second channel (5 and 6 ports) of U2, controlling the resistance value of the positive electrode of the battery connected into the singlechip, enabling the positive electrode and the negative electrode of the battery to form an unbalanced bridge, collecting the voltages of Vins + and Vins-again by the singlechip, marking as U1 'and U2', and calculating the insulation resistance value of the positive; if Vins + is less than or equal to Vins-, a second channel (namely 5 and 6 ports) of the U2 is closed, a first channel (namely 7 and 8 ports) of the U2 is opened, the resistance value of the battery negative electrode connected to the single chip microcomputer is controlled, so that a non-balanced bridge is formed between the positive electrode and the negative electrode of the battery, the single chip microcomputer collects Vins + and Vins-voltage again, the voltage is recorded as U1 and U2, and the insulation resistance values of the positive electrode and the negative electrode are calculated through a formula.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A battery insulation resistance detection circuit, comprising:
the sampling loop unit is used for connecting the anode and the cathode of the battery to form a loop;
the switch unit is used for controlling the positive electrode and the negative electrode of the battery to be connected into the sampling loop unit;
and the control unit is used for controlling the resistance values of the anode and the cathode of the battery connected to the sampling loop unit.
2. The battery insulation resistance detection circuit according to claim 1, wherein the switch unit comprises an optocoupler U1 for controlling the positive pole of the battery to be connected into the sampling loop unit, and an optocoupler U3 for controlling the negative pole of the battery to be connected into the sampling loop unit, and the optocoupler U1 is connected in series with the optocoupler U3.
3. The battery insulation resistance detection circuit according to claim 1, wherein the sampling loop unit comprises a plurality of resistors sequentially connected in series and connected with the output end and the input end of the optocoupler U1, and a plurality of resistors sequentially connected in series and connected with the output end and the input end of the optocoupler U3.
4. The battery insulation resistance detection circuit of claim 2, wherein the types of the optocouplers U1 and U3 are AQV258 optocouplers.
5. The battery insulation resistance detection circuit according to claim 1, wherein the control unit is specifically an optocoupler U2, and the optocoupler U2 includes a first channel for controlling on/off of a resistor connected to an output terminal of the optocoupler U1 and a second channel for controlling on/off of a resistor connected to an output terminal of the optocoupler U3.
6. The battery insulation resistance detection circuit according to claim 5, wherein the optocoupler U2 is of type AQW 216.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921162730.6U CN210803581U (en) | 2019-07-23 | 2019-07-23 | Battery insulation resistance detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921162730.6U CN210803581U (en) | 2019-07-23 | 2019-07-23 | Battery insulation resistance detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210803581U true CN210803581U (en) | 2020-06-19 |
Family
ID=71229268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921162730.6U Active CN210803581U (en) | 2019-07-23 | 2019-07-23 | Battery insulation resistance detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210803581U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346643A (en) * | 2019-07-23 | 2019-10-18 | 安徽贵博新能科技有限公司 | A kind of battery insulation resistance detecting circuit and detection method |
-
2019
- 2019-07-23 CN CN201921162730.6U patent/CN210803581U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346643A (en) * | 2019-07-23 | 2019-10-18 | 安徽贵博新能科技有限公司 | A kind of battery insulation resistance detecting circuit and detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101907688B (en) | Method for detecting electrical property consistency of lithium ion battery | |
| CN103941210A (en) | BMS (battery management system) testing monitoring system and method | |
| CN111483350B (en) | Balance and micro-short circuit detection method for power battery pack | |
| CN205407331U (en) | Group battery intelligent management system suitable for new forms of energy car | |
| CN104682487A (en) | Mine power battery | |
| CN104682523A (en) | Intelligent charger | |
| CN108808137B (en) | A kind of lithium battery management system | |
| CN210803581U (en) | Battery insulation resistance detection circuit | |
| CN208969217U (en) | Lead-acid batteries run detection system | |
| CN103171451A (en) | Battery management system based on co-processor and solid-state relay | |
| CN201289521Y (en) | High-power battery test system | |
| CN202019034U (en) | Lithium ion battery management system | |
| CN110346643A (en) | A kind of battery insulation resistance detecting circuit and detection method | |
| CN204794281U (en) | Light charger | |
| CN209434912U (en) | A kind of smart battery system | |
| CN110749836A (en) | Unbalanced bridge circuit detection model and method for electric leakage condition and position of any point in battery pack | |
| CN110412471A (en) | A kind of construction method of Li-ion batteries piles composite electrochemical polarization model | |
| CN202474130U (en) | Backup battery pack system | |
| CN203773028U (en) | Battery performance inspection apparatus | |
| CN206313503U (en) | The connection topology adjustable battery pack of dynamic | |
| CN210090570U (en) | Battery management system frock detecting system | |
| CN205141749U (en) | Electromobile lithium battery management device | |
| Ping et al. | A distributed management system for lithium ion battery pack | |
| CN109017425A (en) | New energy electric motor vehicle charging control circuit | |
| CN111060843A (en) | Device and method for detecting leakage current of slave board of battery management system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |