CN210041403U - Battery charge-discharge control circuit and car - Google Patents

Battery charge-discharge control circuit and car Download PDF

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Publication number
CN210041403U
CN210041403U CN201921302984.3U CN201921302984U CN210041403U CN 210041403 U CN210041403 U CN 210041403U CN 201921302984 U CN201921302984 U CN 201921302984U CN 210041403 U CN210041403 U CN 210041403U
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charging
contactor
bms
heating
circuit
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CN201921302984.3U
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李晓斌
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Beijing Electric Vehicle Co Ltd
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Beijing Electric Vehicle Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The utility model provides a battery charge and discharge control circuit and car relates to electric automobile battery management technical field. The battery charge and discharge control circuit includes: the device comprises a discharging loop, a charging loop, a first positive pole loop, a second positive pole loop, a negative pole loop and a heating loop; the discharging circuit is electrically connected with the charging circuit and electrically connected with a Battery Management System (BMS); the first positive circuit is electrically connected with the discharge circuit and the second positive circuit; when any one of the discharge loop, the charge loop, the first positive pole loop and the second positive pole loop has a fault, the fault can be converted to other loops to work according to actual conditions. The utility model discloses a when the arbitrary device of battery charge-discharge control circuit had avoided breaking down, the car can not travel or charge, and the problem of customer complaining easily takes place to improve battery charge-discharge control circuit multi-functional control's ability, guaranteed electric automobile's quality and fail safe nature.

Description

Battery charge-discharge control circuit and car
Technical Field
The utility model relates to an electric automobile battery management technical field, in particular to battery charge-discharge control circuit and car.
Background
At present, the power battery is widely applied to the electric automobile, and the power battery in the automobile mostly adopts the technical scheme that a discharging loop and a charging loop are separately controlled. When any one of the discharge circuit and the charge circuit is out of order, the automobile cannot run normally or be charged, and customer complaints are easy to occur, which is not favorable for improving the safety and reliability of the automobile and the using satisfaction of customers.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a battery charge-discharge control circuit and car to when solving discharge circuit or the arbitrary trouble that breaks down in charge circuit, the car can not normally travel or charge, and takes place the problem that customer complains easily.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a battery charge and discharge control circuit comprising:
the device comprises a discharging loop, a charging loop, a first positive pole loop, a second positive pole loop, a negative pole loop and a heating loop;
the discharging circuit is electrically connected with the charging circuit and electrically connected with a Battery Management System (BMS);
the first positive circuit is electrically connected with the discharge circuit and the second positive circuit;
the negative electrode return is electrically connected with the BMS;
the heating circuit is electrically connected to the BMS.
Further, the discharge circuit includes: a first main fuse and a main positive contact electrically connected to the first main fuse (7);
the first main fuse and the main positive contactor are both electrically connected with the BMS;
the BMS is connected with a first end of the first main fuse through a first voltage detection unit;
the BMS is connected with the first end of the main positive contactor through a fifth voltage detection unit.
Further, the charging circuit comprises a second main fuse and a quick charging contactor electrically connected with the second main fuse;
the second main fuse and the quick charging contactor are electrically connected with the BMS;
the BMS is connected with a first end of the second main fuse through a second voltage detection unit;
the BMS is connected with the first end of the quick-charging contactor through a sixth voltage detection unit.
Further, the first positive pole circuit comprises a first pre-charging resistor and a first pre-charging contactor;
the second end of the first pre-charging contactor is connected with the first end of the first pre-charging resistor in series, then is connected with the two ends of the main positive contactor in parallel and is connected into a discharging loop;
the BMS is connected with a first end of the first pre-charging resistor through a third voltage detection unit.
Further, the second positive circuit comprises a second pre-charging resistor and a second pre-charging contactor;
the second end of the second pre-charging contactor is connected with the first end of the second pre-charging resistor in series, then is connected with the two ends of the fast charging contactor in parallel and is connected into a charging loop;
the BMS is connected to a first end of the second pre-charge resistor through a fourth voltage detection unit.
Further, the negative circuit includes: a main negative contactor and a current sensor; the main negative contactor and the current sensor are both electrically connected with the BMS;
the BMS is connected with the first end of the current sensor through a current detection unit;
the second end of the current sensor is connected with the first end of the main negative contactor;
the BMS is connected with the second end of the main negative contactor and the first end of the first pre-charging resistor through a third voltage detection unit; the BMS is connected with the second end of the main negative contactor (10) and the first end of the second pre-charging resistor through a fourth voltage detection unit.
Further, the heating circuit includes: a heating fuse and a heating contactor; the heating fuse is electrically connected with the heating contactor, the heating fuse is also electrically connected with the main negative contactor and the BMS;
the first end of the heating fuse is connected with the second end of the main negative contactor;
the second end of the heating fuse is connected with the first end of the heating contactor;
and the second end of the heating contactor is connected with the heating negative electrode end and the first end of the positive temperature coefficient thermistor (PTC).
Further, the battery charge and discharge control circuit further includes:
a charging or discharging positive electrode, a charging or discharging negative electrode, a heating positive electrode, and the heating negative electrode;
the charging or discharging positive electrode is connected with the heating positive electrode and the second end of the PTC, and the BMS is electrically connected with the heating positive electrode and the second end of the PTC.
The embodiment of the utility model provides a still provide an automobile, include as above battery charge-discharge control circuit.
The utility model has the advantages that:
in the above scheme, the battery charge and discharge control circuit includes: the battery management system comprises a discharging loop, a charging loop, a battery management system BMS, a first positive pole loop, a second positive pole loop, a negative pole loop and a heating loop; the discharging circuit is electrically connected with the charging circuit and electrically connected with the BMS; the first positive circuit is electrically connected with the discharge circuit and the second positive circuit; the negative electrode return is electrically connected with the BMS; the heating circuit is electrically connected with the BMS; the discharging loop and the charging loop can be mutually converted with the actual situation; the problems that the automobile cannot be charged or run and customers easily complain about when the discharging circuit or the charging circuit breaks down are greatly solved, so that the multifunctional control capability of the battery charging and discharging control circuit is improved, and the quality and the safety and the reliability of the electric automobile are ensured.
Drawings
Fig. 1 shows a schematic configuration diagram of a battery charge/discharge control circuit according to the present invention.
Description of reference numerals:
1-a first pre-charge resistor; 2-a first pre-charge contactor; 3-a main positive contactor; 4-a second pre-charge resistor; 5-a second pre-charge contactor; 6-a quick-charging contactor; 7-a first main fuse; 8-a second main fuse; 9-a current sensor; 10-a main negative contactor; 11-heating the fuse; 12-heating the contactor; 13-positive temperature coefficient thermistor PTC; v10 — first voltage detection unit; v11 — second voltage detection unit; v20 — third voltage detection unit; v21 — fourth voltage detection unit; v30-fifth voltage detection unit; v31 — sixth voltage detection unit; v40 — current detection unit; a-a charging or discharging positive electrode; b-charging or discharging the negative electrode; c-heating the positive electrode; d-heating the negative electrode.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses to when discharge circuit or any device of charge circuit broke down in battery charge-discharge control circuit, the car can not travel or charge, and the problem of customer complaint easily takes place, provides a battery charge-discharge control circuit and car.
As shown in fig. 1, an embodiment of the present invention provides a battery charging/discharging control circuit, including: the device comprises a discharging loop, a charging loop, a first positive pole loop, a second positive pole loop, a negative pole loop and a heating loop;
the discharging circuit is electrically connected with the charging circuit and electrically connected with a Battery Management System (BMS);
the first positive circuit is electrically connected with the discharge circuit and the second positive circuit;
the negative electrode return is electrically connected with the BMS;
the heating circuit is electrically connected to the BMS.
The embodiment of the utility model provides an in, when arbitrary device broke down in discharge circuit, charge circuit, first positive return circuit and the second positive return circuit, can with other return circuit work of actual conditions conversion, when having avoided arbitrary device of battery charge and discharge control circuit to break down, the car can not travel or charge, and the problem that customer complains about easily takes place to improve the ability of the multi-functional control of battery charge and discharge control circuit, guaranteed electric automobile's quality and fail safe nature.
In an optional embodiment of the present invention, the discharge circuit includes: a first main fuse 7 and a main positive contact 3 electrically connected to the first main fuse 7; the first main fuse 7 and the main positive contactor 3 are both electrically connected to the BMS;
the BMS is connected to the first end of the first main fuse 7 through a first voltage detecting unit V10;
the BMS is connected to the first terminal of the main positive contact 3 through a fifth voltage detecting unit V30.
In an optional embodiment of the present invention, the charging circuit includes a second main fuse 8 and a fast charging contactor 6 electrically connected to the second main fuse 8;
the second main fuse 8 and the quick charging contactor 6 are both electrically connected with the BMS;
the BMS is connected to the first end of the second main fuse 8 through a second voltage detecting unit V11;
the BMS is connected to the first end of the quick charging contactor 6 through a sixth voltage detecting unit V31.
The main positive contactor 3 is adopted to discharge in a normal working state, the quick-charging contactor 6 is adopted to charge in a charging mode, and the main positive contactor 3 and the quick-charging contactor 6 work separately in two modes.
Under the condition of normal discharge, when the BMS detects that the voltage value is abnormal through a fifth voltage detection unit and judges that the main positive contactor 3 is abnormal and can not work, the BSM automatically identifies and closes the quick-charging contactor 6 to replace the main positive contactor 3 to work;
under the normal charging condition, when BMS passes through when the sixth voltage detecting element detects voltage value unusual and judges the contactor 6 that fills soon is unusual when unable during operation, BSM automatic identification closes main positive contactor 3 replaces the contactor 3 that fills soon works.
The method comprises the steps that a first main fuse 7 is adopted to work in a normal state, when the BMS detects voltage through a first voltage detector V1 in a driving or working state, whether the first main fuse 7 is abnormal or not is judged, if the voltage value detected by the first voltage detector is not consistent with the voltage value preset in the BMS, the BMS acts, a quick-charging contactor 6 is closed, a charging loop is started, and accidents caused by sudden power interruption are avoided; when first fuse 7 broke down, the charging circuit acted as the return circuit of discharging and positive pole return circuit, until second voltage detecting element V11 voltage is unusual, when second main fuse 8 broke down, maintained, reduced the maintenance number of times of getting into the station, promoted user experience.
In an optional embodiment of the present invention, the first positive circuit includes a first pre-charging resistor 1 and a first pre-charging contactor 2;
the second end of the first pre-charging contactor 2 is connected with the first end of the first pre-charging resistor 1 in series, then is connected with the two ends of the main positive contactor 3 in parallel and is connected into a discharging loop;
the BMS is connected to the first end of the first pre-charging resistor 1 through a third voltage detecting unit V20.
In an optional embodiment of the present invention, the second positive circuit includes a second pre-charging resistor 4 and a second pre-charging contactor 5;
the second end of the second pre-charging contactor 5 is connected in series with the first end of the second pre-charging resistor 4, then is connected in parallel with the two ends of the fast-charging contactor 6, and is connected to a charging loop;
the BMS is connected to the first end of the second pre-charge resistor 4 through a fourth voltage detecting unit V21.
Under the normal pre-charge mode state, use first pre-charge contactor 2 and first pre-charge 1, when BMS detects through the second voltage detection unit when unusual, and when judging first pre-charge resistance 1 short circuit, BMS automatic identification launches second pre-charge resistance 4 and second pre-charge contactor 5 and carries out work, avoids the vehicle to result in unable power-on because of the pre-charge failure, promotes product property ability and maintenance number of times of arriving at a station.
In an optional embodiment of the present invention, the negative electrode loop includes: a main negative contactor 10, a current sensor 9; the main negative contactor 10 and the current sensor 9 are both electrically connected to the BMS;
the BMS is connected to a first end of the current sensor 9 through a current detection unit V40;
the second end of the current sensor 9 is connected with the first end of the main negative contactor 10;
the BMS is connected to the second terminal of the main negative contactor 10 and the first terminal of the first pre-charging resistor 1 through a third voltage detecting unit V20; the BMS is connected to the second terminal of the main negative contactor 10 and the first terminal of the second pre-charge resistor through a fourth voltage detecting unit V21.
In an optional embodiment of the present invention, the heating circuit includes: a heating fuse 11 and a heating contactor 12; the heating fuse 11 is electrically connected to the heating contactor 12, and the heating fuse 11 is also electrically connected to the main negative contactor 10 and the BMS;
a first end of the heating fuse 11 is connected with a second end of the main negative contactor 10;
the second end of the heating fuse 11 is connected with the first end of the heating contactor 12;
and the second end of the heating contactor 12 is connected with the end D of the heating cathode and the first end of the positive temperature coefficient thermistor PTC.
The utility model discloses an in an optional embodiment, battery charge-discharge control circuit can also include:
a charging or discharging anode A, a charging or discharging cathode B, a heating anode C and the heating cathode D;
the charging or discharging positive electrode a is connected with the heating positive electrode C and the second end of the PTC, and the BMS is electrically connected with the heating positive electrode C and the second end of the PTC.
The above embodiment of the utility model, set up independent heating interface, battery package heating circuit carries out the parallel design with whole car heating, and the battery package can realize heating battery package and whole car simultaneously, also can realize whole car and heat the battery package to promote product property ability.
The utility model discloses an above-mentioned embodiment battery charge-discharge control circuit for guide the design of electrical system, promote battery system's fail safe nature.
In the above embodiments of the present invention, the third voltage detecting unit V20 of the BMS detects whether the main negative contactor and the first pre-charging resistor are in a normal working state, sets up independent pre-charging resistor resistance monitoring, and distinguishes the fault source of the main negative contactor and the first pre-charging resistor; a fourth voltage detection unit V21 detects whether the main negative contactor and the second pre-charging resistor work normally or not, sets independent pre-charging resistor resistance value monitoring, and distinguishes fault sources of the main negative contactor and the second pre-charging resistor; the sixth voltage detection unit V31 detects whether the quick charging contactor, the first pre-charging contactor and the second pre-charging contactor have faults; the main negative contactor, the heating contactor, the main positive contactor, the pre-charging contactor and the quick-charging contactor are controlled by the BMS to work, and the current sensor feeds back a detection current signal to the BMS through V4.
The embodiment of the utility model provides a still provide an automobile, include as above battery charge-discharge control circuit. The battery charging and discharging control circuit greatly avoids the problems that an automobile cannot run or be charged and customers easily complain about when any device fails in the battery charging and discharging process, so that the multifunctional control capability of the battery charging and discharging control circuit is improved, and the quality and the safety and the reliability of the electric automobile are ensured.
The foregoing is directed to the preferred embodiments of the present invention, and it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the invention, and that such changes and modifications are intended to be included within the scope of the invention.

Claims (9)

1. A battery charge and discharge control circuit, comprising: the device comprises a discharging loop, a charging loop, a first positive pole loop, a second positive pole loop, a negative pole loop and a heating loop;
the discharging circuit is electrically connected with the charging circuit and electrically connected with a Battery Management System (BMS);
the first positive circuit is electrically connected with the discharge circuit and the second positive circuit;
the negative electrode circuit and the heating circuit are electrically connected to the BMS, respectively.
2. The battery charge and discharge control circuit of claim 1, wherein the discharge loop comprises: a first main fuse (7) and a main positive contact (3) electrically connected to the first main fuse (7);
the first main fuse (7) and the main positive contactor (3) are both electrically connected with the BMS;
the BMS is connected to a first end of the first main fuse (7) through a first voltage detection unit (V10);
the BMS is connected to the first end of the main positive contact (3) through a fifth voltage detecting unit (V30).
3. The battery charge and discharge control circuit according to claim 2, wherein the charging circuit comprises a second main fuse (8) and a fast charging contactor (6) electrically connected to the second main fuse (8);
the second main fuse (8) and the quick charging contactor (6) are both electrically connected with the BMS;
the BMS is connected to a first end of the second main fuse (8) through a second voltage detecting unit (V11);
the BMS is connected with the first end of the quick-charging contactor (6) through a sixth voltage detection unit (V31).
4. The battery charge and discharge control circuit of claim 2,
the first positive pole circuit comprises a first pre-charging resistor (1) and a first pre-charging contactor (2);
the second end of the first pre-charging contactor (2) is connected with the first end of the first pre-charging resistor (1) in series, then is connected with the two ends of the main positive contactor (3) in parallel and is connected into a discharging loop;
the BMS is connected to a first end of the first pre-charging resistor (1) through a third voltage detection unit (V20).
5. The battery charge and discharge control circuit of claim 3,
the second positive pole circuit comprises a second pre-charging resistor (4) and a second pre-charging contactor (5);
the second end of the second pre-charging contactor (5) is connected with the first end of the second pre-charging resistor (4) in series, then is connected with the two ends of the fast charging contactor (6) in parallel, and is connected to a charging loop;
the BMS is connected to the first end of the second pre-charge resistor (4) through a fourth voltage detection unit (V21).
6. The battery charge-discharge control circuit according to claim 5,
the negative electrode circuit includes: a main negative contactor (10) and a current sensor (9); the main negative contactor (10) and the current sensor (9) are both electrically connected with the BMS;
the BMS is connected with a first end of the current sensor (9) through a current detection unit (V40);
the second end of the current sensor (9) is connected with the first end of the main negative contactor (10);
the BMS is connected with the second end of the main negative contactor (10) and the first end of the first pre-charging resistor (1) through a third voltage detection unit (V20); the BMS is connected with the second end of the main negative contactor (10) and the first end of the second pre-charging resistor (4) through a fourth voltage detection unit (V21).
7. The battery charge-discharge control circuit according to claim 6,
the heating circuit includes: a heating fuse (11) and a heating contactor (12); the heating fuse (11) is electrically connected with the heating contactor (12), the heating fuse (11) is also electrically connected with the main negative contactor (10) and the BMS;
the first end of the heating fuse (11) is connected with the second end of the main negative contactor (10);
the second end of the heating fuse (11) is connected with the first end of the heating contactor (12);
and the second end of the heating contactor (12) is connected with the end of a heating cathode (D) and the first end of a positive temperature coefficient thermistor (PTC).
8. The battery charge and discharge control circuit of claim 7, further comprising:
a charging or discharging positive electrode (A), a charging or discharging negative electrode (B), a heating positive electrode (C), and the heating negative electrode (D);
the charging or discharging positive electrode (a) is connected with the heating positive electrode (C) and the second end of the PTC, and the BMS is electrically connected with the heating positive electrode (C) and the second end of the PTC.
9. An automobile, comprising: the battery charge and discharge control circuit according to any one of claims 1 to 8.
CN201921302984.3U 2019-08-12 2019-08-12 Battery charge-discharge control circuit and car Active CN210041403U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921302984.3U CN210041403U (en) 2019-08-12 2019-08-12 Battery charge-discharge control circuit and car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921302984.3U CN210041403U (en) 2019-08-12 2019-08-12 Battery charge-discharge control circuit and car

Publications (1)

Publication Number Publication Date
CN210041403U true CN210041403U (en) 2020-02-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921302984.3U Active CN210041403U (en) 2019-08-12 2019-08-12 Battery charge-discharge control circuit and car

Country Status (1)

Country Link
CN (1) CN210041403U (en)

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