CN210572674U - Voltage sampling channel leakage current detection equipment for serial battery module cell - Google Patents
Voltage sampling channel leakage current detection equipment for serial battery module cell Download PDFInfo
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- CN210572674U CN210572674U CN201921140775.3U CN201921140775U CN210572674U CN 210572674 U CN210572674 U CN 210572674U CN 201921140775 U CN201921140775 U CN 201921140775U CN 210572674 U CN210572674 U CN 210572674U
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Abstract
The utility model discloses a voltage sampling passageway leakage current check out test set for serial-type battery module electricity core, include: a series-connected battery module; the leakage current testing assembly is internally provided with an amplifier U1, the IN end of the amplifier U1 is connected with the anode and is electrically connected with the anode of the serial battery module through the input end of a 20pin connector, the design is simple and practical, each leakage current detecting loop is connected with a 3 omega resistor IN series, two ends of the resistor are taken as testing points to be led out, and the specific leakage current value can be calculated by measuring the terminal voltage of the resistor; the leakage current detection range is wide, the leakage current of 1 mA-300 mA can be detected, the leakage current of the MBB sampling plate 4 to be detected is amplified and then detected, the leakage current exceeding 1mA can influence the self-discharge performance of the module, the leakage current is detected and displayed by red diode lamps of all paths, and the fact that the red diode lamps are on indicates that the path of the equalization circuit has the leakage current.
Description
Technical Field
The utility model relates to a leakage current detection technical field especially relates to a voltage sampling passageway leakage current check out test set for serial-type battery module electricity core.
Background
With the rapid development of new energy vehicles, PHEV and EV vehicles enter thousands of households. With the increasing popularization of electric vehicles, the importance of a vehicle-mounted power battery system as a power source of the electric vehicle is self-evident, and the battery cells are core sub-components of the battery system, and the voltage difference between the battery cells can affect the endurance mileage of the electric vehicle. Therefore, in the production and manufacturing links of power battery manufacturers, unqualified battery systems with leakage current are prevented from entering the market through a reasonable method, and the situation that power battery manufacturers, whole electric automobile factories and market consumers win three-win is provided, so that the leakage current detection equipment for the voltage sampling channel of the serial battery module cell is provided, and the problems are solved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a voltage sampling passageway leakage current check out test set for serial-type battery module electricity core can detect whether MBB (electric core sampling equalizer plate in the battery system) equalizer circuit is normal, prevents that MBB equalizer circuit switch from having big leakage current, leads to electric core electricity to be emptyd or from discharging too big, and it has the design succinctly, rational in infrastructure, and simple and practical maintains a great deal of advantage such as convenient to this solves the problem of mentioning in the above-mentioned background art.
The utility model discloses by following technical scheme implement: a voltage sampling passageway leakage current check out test set for serial-type battery module electricity core includes:
a series-connected battery module;
the leakage current testing assembly is internally provided with an amplifier U1, the IN end of the amplifier U1 is connected with the positive electrode and is electrically connected with the positive electrode of the serial battery module through the input end of a 20pin connector, and the OUT end of the amplifier U1 is connected with the negative electrode and is electrically connected with the negative electrode of the serial battery module through the input end of the 20pin connector;
the electrical output end of the 12V direct current power supply is connected with the electrical input end of the leakage current testing component and is used for supplying power to the leakage current testing component;
the MBB sampling plate to be tested is electrically connected with the cathode of the OUT end of the amplifier U1 of the leakage current testing component through the output end of a 20pin connector;
the leakage current testing assembly comprises a leakage current detection circuit and a power supply conversion module circuit, and the power supply conversion module circuit is used for supplying power to the leakage current detection circuit.
Further, the amplifier U1 is packaged in the leakage current detection circuit, the pin 2 of the inverting input terminal of the amplifier U1 is electrically connected to one end of the resistor R9 and one end of the resistor R3, the pin 3 of the non-inverting input terminal of the amplifier U1 is electrically connected to one end of the resistor R16, the other end of the resistor R9 is electrically connected to one end of the resistor R13 and grounded, the other end of the resistor R16 is electrically connected to the other end of the resistor R13 and the anode of the capacitor C29, and the cathode of the capacitor C29 is grounded, the pin 7 of the power supply voltage input terminal of the amplifier U1 is electrically connected to the positive terminal VCC of the power supply voltage and the anode of the capacitor C21, and the cathode of the capacitor C21 is grounded, the pin 6 of the output terminal of the amplifier U1 is electrically connected to the cathode of the diode D5, one end of the resistor R11, one end of the resistor 573r 22, the anode of the capacitor C26 and the other end of the resistor R3, and the pin 4 of the amplifier U1 is electrically, and electric capacity C25's negative pole ground connection, one side of diode D1 is parallelly connected each other and electric connection has resistance R22 and electric capacity C26, and diode D1's negative pole, resistance R22's the other end and electric capacity C26's negative pole all ground connection, resistance R22's the other end is connected with NPN transistor Q1's base electricity, NPN transistor Q1's collecting electrode and luminous diode LED 1's negative pole electric connection, NPN transistor Q1's emitter ground connection, luminous diode LED 1's positive pole and resistance R1's one end electricity are connected, and another termination power supply voltage positive VCC electric connection of resistance R1.
Further, the power conversion module circuit comprises a power module P1, wherein pin 1 of the power module P1 is electrically connected with the positive electrode of a capacitor C1, the negative electrode of the capacitor C1 is grounded, pin 2 of the ground terminal of the power module P1 is grounded, pin 6 of the power module P1 is electrically connected with the positive electrode of a capacitor C2 and the positive electrode of a capacitor C7 respectively, the capacitor C2 and the capacitor C7 are electrically connected in parallel and grounded, pin 4 of the power module P1 is electrically connected with the negative electrodes of a capacitor C3 and a capacitor C8 respectively, and the capacitor C3 and the capacitor C8 are electrically connected in parallel and grounded.
Further, the amplifier U1 is an AD705 operational amplifier, and the power module P1 is a DC/DC-A1212S.
Further, the number of the leakage current detection circuits is not less than 12 groups.
Further, the output end a1 of the series battery module is electrically connected with one end of a resistor R9 and one end of a resistor R13, respectively, and the input end B1 of the MBB sampling board to be tested is electrically connected with the other end of the resistor R13, the other end of the resistor R16 and the anode of a capacitor C29, respectively.
Further, the positive electrode of the MBB sampling plate to be detected is 11 paths, and the negative electrode is 12 paths.
The utility model has the advantages that:
the utility model has the advantages that the design is simple and practical, each leakage current detection loop is connected with a 3 omega resistor in series and two ends of the resistor are led out as test points, and the specific leakage current value can be calculated by measuring the terminal voltage of the resistor;
the utility model has wide leakage current detection range, can detect leakage current of 1 mA-300 mA, and can detect the leakage current of the MBB sampling plate 4 to be detected after amplifying the leakage current, the leakage current exceeding 1mA can influence the self-discharge performance of the module, the detected leakage current is displayed by red diode lamps of each path, and the LED lamps are lighted to indicate that the path of the equalization circuit has leakage current;
thirdly, the MBB sampling plate to be tested is electrically connected with the OUT end cathode of the amplifier U1 of the leakage current testing component through the 20pin connector output end, so that the positive and negative MBB sampling plates (11 paths of positive electrodes and 12 paths of negative electrodes) can be simultaneously detected, and the MBB equalizing circuit switch is prevented from having large leakage current, and the cell electricity is prevented from being discharged or the self-discharge is too large;
fourthly, each path of the leakage current detection circuit in the test equipment of the utility model uses an independent 12V power module for power supply, and each path is independently grounded, so that the robustness is better;
fifthly, the utility model discloses a leakage current detection equipment is with low costs, and the effect is showing, and application scope is wide, is fit for promoting.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of an internal detection circuit of the leakage current detection device of the present invention;
fig. 3 is a leakage current detection circuit diagram of the present invention;
fig. 4 is a circuit diagram of the power conversion module of the present invention.
The parts in the drawings are marked as follows:
1. a series-connected battery module; 2. a leakage current test component; 3. a 12V DC power supply; 4. MBB sampling plate to be tested.
Detailed Description
The following description is provided for illustrative embodiments of the present invention, and the advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure of the present invention. The present invention can also be implemented in other different ways, i.e. different modifications and changes can be made without departing from the scope of the present invention.
Examples
As shown in fig. 1-4; a voltage sampling passageway leakage current check out test set for serial-type battery module electricity core includes:
a series battery module 1;
the leakage current testing assembly 2 is internally provided with an amplifier U1, the IN end of the amplifier U1 is connected with the positive electrode and is electrically connected with the positive electrode of the serial battery module through the input end of a 20pin connector, and the OUT end of the amplifier U1 is connected with the negative electrode and is electrically connected with the negative electrode of the serial battery module 1 through the input end of the 20pin connector;
the electrical output end of the 12V direct current power supply 3 is connected with the electrical input end of the leakage current testing component 2 and is used for supplying power to the leakage current testing component 2;
the MBB sampling plate 4 to be tested is electrically connected with the cathode of the OUT end of the amplifier U1 of the leakage current testing component 2 through the output end of a 20pin connector;
the leakage current testing component 2 comprises a leakage current detection circuit and a power supply conversion module circuit, and the power supply conversion module circuit is used for supplying power to the leakage current detection circuit.
As shown in fig. 3, the amplifier U1 is packaged in the leakage current detection circuit, the pin 2 of the inverting input terminal of the amplifier U1 is electrically connected to one end of the resistor R9 and one end of the resistor R3, the pin 3 of the non-inverting input terminal of the amplifier U1 is electrically connected to one end of the resistor R16, the other end of the resistor R9 is electrically connected to one end of the resistor R13 and grounded, the other end of the resistor R16 is electrically connected to the other end of the resistor R13 and the positive electrode of the capacitor C29, and the negative electrode of the capacitor C29 is grounded, the pin 7 of the power supply voltage input terminal of the amplifier U1 is electrically connected to the positive electrode VCC of the power supply voltage and the positive electrode of the capacitor C21, and the negative electrode of the capacitor C21 is grounded, the pin 6 of the output terminal of the amplifier U1 is electrically connected to the negative electrode of the diode D5, one end of the resistor R11, one end of the resistor 573r 22, the positive electrode of the capacitor C26 and the other end of the resistor R3, and, the negative electrode of the capacitor C25 is grounded, one side of the diode D1 is connected in parallel with each other and is electrically connected with a resistor R22 and a capacitor C26, the negative electrode of the diode D1, the other end of the resistor R22 and the negative electrode of the capacitor C26 are grounded, the other end of the resistor R22 is electrically connected with the base electrode of an NPN transistor Q1, the collector electrode of the NPN transistor Q1 is electrically connected with the negative electrode of the LED1, the emitter electrode of the NPN transistor Q1 is grounded, the positive electrode of the LED1 is electrically connected with one end of a resistor R1, the other end of the resistor R1 is electrically connected with a power supply voltage positive electrode VCC, the resistor R13 is connected in series with a battery cell negative electrode line, A1 and B1 are 3 Ω leakage current resistance test leading-out points, the LED1 is a leakage current indicator, when leakage occurs, the leakage current can flow through the resistor R13, two points A1 and B1 of the battery module form a voltage difference, and the voltage after the AD, a loop is formed and current flows through the LED1, which lights up indicating a leakage current.
As shown in fig. 4, the power conversion module circuit includes a power module P1, pin 1 of the power module P1 is electrically connected to the positive electrode of a capacitor C1, the negative electrode of the capacitor C1 is grounded, the grounding end 2 pin of the power supply module P1 is grounded, the 6 pins of the power supply module P1 are respectively and electrically connected with the positive electrode of the capacitor C2 and the positive electrode of the capacitor C7, the capacitor C2 and the capacitor C7 are electrically connected in parallel with each other and grounded, the 4 pins of the power module P1 are electrically connected with the cathodes of the capacitor C3 and the capacitor C8 respectively, the capacitor C3 and the capacitor C8 are electrically connected in parallel with each other and grounded, the amplifier U1 is an AD705 operational amplifier, the power supply module P1 is a DC/DC-A1212S, namely, a direct current-to-direct current voltage conversion module and a power conversion module circuit are also 12 independent circuits, and the power module P1 (DC/DC-a 1212S) converts the externally connected 12V direct current power supply into the power supply required by the AD705 operational amplifier.
The number of the leakage current detection circuits is not less than 12 groups, the 20pin connector (IN) is connected with the serial battery module 1, the 20pin connector (OUT) is connected with the MBB sampling plate 4 to be detected, 12-path detection is supported, the circuit design of each path is the same, and the number of detection paths can be increased theoretically so as to match all module types.
The output end A1 of the series battery module is respectively and electrically connected with one end of a resistor R9 and one end of a resistor R13, and the input end B1 of the MBB sampling plate to be tested is respectively and electrically connected with the other end of the resistor R13, the other end of the resistor R16 and the anode of a capacitor C29.
The positive pole of MBB sampling board that awaits measuring is 11 ways, and the negative pole is 12 ways.
The utility model discloses a working process and theory of operation as follows:
through leakage current detection equipment (equalization circuit detection board), the leakage current of the equalization circuit of the MBB sampling board 4 to be detected is amplified and then detected, the leakage current exceeding 1mA can influence the self-discharge performance of the module, and the MBB sampling board 4 to be detected is regarded as unqualified. The detection board amplifies a current signal of 1 mA-300 mA, and displays whether the MBB sampling board 4 to be detected is qualified or not in a light mode. And if the red light is on, the product is unqualified. Through the detection to equalizer circuit, can prevent that the module from placing the condition that the electricity was emptied after three months.
Firstly, a leakage current detection box sets a general power-on button switch and a power-on indicator lamp to indicate that the test is ready;
secondly, each path of diode display lamp (the diode lamp holder is fixed) is arranged on the panel of the leakage current detection box, and each path of diode display lamp is led out to pass through a 3 omega resistor leakage current test point (the voltage of the 3 omega resistor terminal can be obtained through other methods);
thirdly, the detected leakage current is displayed by red diode lamps of each path, and the fact that the diode lamps are turned on indicates that the path of equalizing circuit has leakage current.
The above is only the embodiment of the present invention, not so above only is the embodiment of the present invention, not so limiting the patent scope of the present invention, all of which utilize the equivalent structure made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, all of which are included in the patent protection scope of the present invention.
Claims (7)
1. A voltage sampling passageway leakage current check out test set for serial-type battery module electricity core, its characterized in that includes:
a series-connected battery module;
the leakage current testing assembly is internally provided with an amplifier U1, the IN end of the amplifier U1 is connected with the positive electrode and is electrically connected with the positive electrode of the serial battery module through the input end of a 20pin connector, and the OUT end of the amplifier U1 is connected with the negative electrode and is electrically connected with the negative electrode of the serial battery module through the input end of the 20pin connector;
the electrical output end of the 12V direct current power supply is connected with the electrical input end of the leakage current testing component and is used for supplying power to the leakage current testing component;
the MBB sampling plate to be tested is electrically connected with the cathode of the OUT end of the amplifier U1 of the leakage current testing component through the output end of a 20pin connector;
the leakage current testing assembly comprises a leakage current detection circuit and a power supply conversion module circuit, and the power supply conversion module circuit is used for supplying power to the leakage current detection circuit.
2. The device according to claim 1, wherein the amplifier U1 is packaged in the leakage current detection circuit, the pin 2 at the reverse input end of the amplifier U1 is electrically connected to one end of a resistor R9 and one end of a resistor R3, the pin 3 at the non-inverting input end of the amplifier U1 is electrically connected to one end of a resistor R16, the other end of the resistor R9 is electrically connected to one end of a resistor R13 and grounded, the other end of the resistor R16 is electrically connected to the other end of a resistor R13 and the positive electrode of a capacitor C29 and the negative electrode of a capacitor C29 and grounded, the pin 7 at the power supply voltage input end of the amplifier U1 is electrically connected to the positive electrode VCC of a power supply voltage and the positive electrode of a capacitor C21 and the negative electrode of a capacitor C21 and the pin 6 at the output end of the amplifier U1 is electrically connected to the negative electrode of a diode D1, one end of the resistor R11 and the negative electrode of, One end of the resistor R22, the anode of the capacitor C26 and the other end of the resistor R3 are electrically connected, the pin 4 of the grounding end of the amplifier U1 is electrically connected with the cathode VCC of the power supply voltage and the anode of the capacitor C25 respectively, and the cathode of the capacitor C25 is grounded, one side of the diode D1 is connected in parallel and electrically connected with the resistor R22 and the capacitor C26, the cathode of the diode D1, the other end of the resistor R22 and the cathode of the capacitor C26 are grounded, the other end of the resistor R22 is electrically connected with the base of the NPN transistor Q1, the collector of the NPN transistor Q1 is electrically connected with the cathode of the LED1, the emitter of the NPN transistor Q1 is grounded, the anode of the LED1 is electrically connected with one end of the resistor R1, and the other end of the resistor R1 is electrically connected with the anode VCC of the.
3. The device for detecting leakage current of voltage sampling channels of series battery module cells according to claim 1, wherein the power conversion module circuit includes a power module P1, pin 1 of the power module P1 is electrically connected to the positive electrode of a capacitor C1, the negative electrode of the capacitor C1 is grounded, pin 2 of the ground terminal of the power module P1 is grounded, pin 6 of the power module P1 is electrically connected to the positive electrode of a capacitor C2 and the positive electrode of a capacitor C7, the capacitor C2 and the capacitor C7 are electrically connected in parallel and grounded, pin 4 of the power module P1 is electrically connected to the negative electrodes of a capacitor C3 and a capacitor C8, and the capacitor C3 and the capacitor C8 are electrically connected in parallel and grounded.
4. The device for detecting leakage current of voltage sampling channels of series battery module cells according to claim 3, wherein the amplifier U1 is an AD705 operational amplifier, and the power module P1 is a DC/DC-A1212S.
5. The device for detecting leakage current in voltage sampling channels of series-connected battery module cells according to claim 1, wherein the number of the leakage current detection circuits is not less than 12.
6. The equipment of claim 2, wherein the output end a1 of the series battery module is electrically connected to one end of a resistor R9 and one end of a resistor R13, respectively, and the input end B1 of the MBB sampling board to be tested is electrically connected to the other end of the resistor R13, the other end of the resistor R16, and the anode of the capacitor C29, respectively.
7. The device for detecting leakage current of the voltage sampling channel used for the battery modules and the electric cores of the series-type battery module of claim 1, wherein the MBB sampling plate to be detected has 11 positive electrodes and 12 negative electrodes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921140775.3U CN210572674U (en) | 2019-07-19 | 2019-07-19 | Voltage sampling channel leakage current detection equipment for serial battery module cell |
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| CN201921140775.3U CN210572674U (en) | 2019-07-19 | 2019-07-19 | Voltage sampling channel leakage current detection equipment for serial battery module cell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113655390A (en) * | 2021-08-09 | 2021-11-16 | 湖北亿纬动力有限公司 | Analysis method for differential pressure fault of battery system |
| WO2022040036A1 (en) * | 2020-08-18 | 2022-02-24 | Element Energy, Inc. | Current testing of cells in multi-cell battery packs |
| CN114993120A (en) * | 2022-04-24 | 2022-09-02 | 上海芯飏科技有限公司 | Detection circuit and method for leakage current of ignition capacitor of electronic detonator |
-
2019
- 2019-07-19 CN CN201921140775.3U patent/CN210572674U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022040036A1 (en) * | 2020-08-18 | 2022-02-24 | Element Energy, Inc. | Current testing of cells in multi-cell battery packs |
| CN113655390A (en) * | 2021-08-09 | 2021-11-16 | 湖北亿纬动力有限公司 | Analysis method for differential pressure fault of battery system |
| CN113655390B (en) * | 2021-08-09 | 2023-10-03 | 湖北亿纬动力有限公司 | Analysis method for differential pressure fault of battery system |
| CN114993120A (en) * | 2022-04-24 | 2022-09-02 | 上海芯飏科技有限公司 | Detection circuit and method for leakage current of ignition capacitor of electronic detonator |
| CN114993120B (en) * | 2022-04-24 | 2023-10-31 | 上海芯飏科技有限公司 | Detection circuit and method for leakage current of ignition capacitor of electronic detonator |
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