CN219096505U - Charging awakening detection circuit, battery management system and electric automobile - Google Patents
Charging awakening detection circuit, battery management system and electric automobile Download PDFInfo
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- CN219096505U CN219096505U CN202222972639.9U CN202222972639U CN219096505U CN 219096505 U CN219096505 U CN 219096505U CN 202222972639 U CN202222972639 U CN 202222972639U CN 219096505 U CN219096505 U CN 219096505U
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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
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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Abstract
The utility model discloses a charging awakening detection circuit, a battery management system and an electric automobile, wherein the circuit comprises: the CC resistor access unit is used for accessing the CC resistor after the charging gun is connected with the charging port; the charging detection unit is used for sending a control signal to the wake-up control unit after detecting that the charging gun is connected with the charging port; the wake-up control unit is used for receiving the control signal, generating a wake-up signal for waking up the battery management system, and converting the wake-up signal into a low-level signal in the charging process; the voltage detection unit is used for acquiring a voltage detection signal of the CC resistor in the charging process; therefore, after the charging is completed, the BMS can enter a sleep mode under the condition that the charging gun is not pulled out, and the electricity consumption of the lead-acid storage battery is reduced; the method adopts a hardware circuit for waking up, has no software logic control, and improves the waking up speed; the circuit does not use an integrated chip, has a simple structure and reduces the cost.
Description
Technical Field
The application relates to the technical field of electric automobiles, and more particularly relates to a charging wake-up detection circuit, a battery management system and an electric automobile.
Background
The electric car charging needs to be performed in a flameout state, and the BMS (Battery Management System ) should be awakened from a sleep mode and enter an operating mode after the charging gun is connected to the car. According to the GBT 18487.1-2015 standard, the BMS judges the connection state with the vehicle through the resistance change caused by the connection of the charging gun, and further controls the execution of the charging process.
The CC resistance is a resistance generated when the charging gun is connected to a charging port of the electric vehicle. In the prior art, most of the charge wake-up detection circuits are provided with a constant current source to measure the resistance value of the CC resistor. The voltage value is obtained by connecting the CC resistor in the constant current source loop through the CC resistor string, the high-level wake-up signal is output by the comparator, and after the BMS is waken, the voltage value of the CC resistor is acquired through the singlechip AD, and then the resistance value of the CC resistor can be obtained according to ohm law R=U/I, so that the CC resistor enters a normal charging flow.
However, in the prior art, the charging wake-up detection circuit needs to be provided with a special current reference source, a voltage stabilizer, a comparator and other devices, and is complex in circuit and high in cost; and after charging, the BMS is always in a working state under the condition that the charging gun is not pulled out, and cannot enter a sleep mode again, and the electric quantity of the whole 12V lead-acid storage battery can be always consumed.
Therefore, how to provide a charging wake-up detection circuit capable of enabling the BMS to enter a sleep mode under the condition that the charging gun is not pulled out after charging is completed, so that the electric quantity consumption of the lead-acid storage battery is reduced, and the technical problem to be solved at present is solved.
Disclosure of Invention
The embodiment of the utility model provides a charging wake-up detection circuit, a battery management system and an electric automobile, which are used for enabling a BMS to enter a sleep mode under the condition that a charging gun is not pulled out after charging is completed, so that the electric quantity consumption of a lead-acid storage battery is reduced.
In a first aspect, a charge wakeup detection circuit is provided, the circuit comprising:
the CC resistor access unit is used for accessing the CC resistor after the charging gun is connected with the charging port;
the charging detection unit is used for sending a control signal to the wake-up control unit after detecting that the charging gun is connected with the charging port;
the wake-up control unit is used for receiving the control signal and generating a wake-up signal for waking up the battery management system, and converting the wake-up signal into a low-level signal in the charging process;
the voltage detection unit is used for acquiring a voltage detection signal of the CC resistor in the charging process;
the first end of the charging detection unit and the first end of the voltage detection unit are connected to the output end of the CC resistor access unit, the second end of the charging detection unit is connected with the first end of the wake-up control unit, the second end of the wake-up control unit is the output end of the wake-up signal, and the second end of the voltage detection unit is the output end of the voltage detection signal.
In some embodiments, the charge detection unit includes a first resistor, a second resistor, a first voltage regulator tube, and a MOS tube, wherein,
one end of the first resistor and the source electrode of the MOS tube are connected with a 12V power supply, the other end of the first resistor and the grid electrode of the MOS tube are connected with one end of the second resistor, the other end of the second resistor is connected with the anode of the first voltage stabilizing tube, the cathode of the first voltage stabilizing tube is the first end of the charging detection unit, and the drain electrode of the MOS tube is the second end of the charging detection unit.
In some embodiments, the wake-up control unit includes a triode, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second voltage regulator, and a third voltage regulator, wherein,
the emitter of triode is connected the first end of awakening control unit, the negative pole of third voltage regulator with the one end of fourth resistance is commonly connected in the emitter of triode, the positive pole of third voltage regulator with the one end of fifth resistance is commonly connected in the base of triode, the other end of fifth resistance is connected the one end of first electric capacity, the other end of fourth resistance with the other end of first electric capacity is all grounded, the collecting electrode of triode is connected the one end of third resistance, the other end of third resistance is connected the positive pole of second voltage regulator, the negative pole of second voltage regulator is connected the second end of awakening control unit.
In some embodiments, the transistor is turned on after receiving the control signal, and makes the first capacitor enter a charging state, and generates a high-level signal as the wake-up signal at the second end of the wake-up control unit, and when the duration of the first capacitor in the charging state reaches a preset duration, the transistor is turned off, and makes the high-level signal turn into a low-level signal.
In some embodiments, the wake-up control unit further includes a second capacitor and a sixth resistor, one end of the second capacitor is connected to the anode of the second voltage stabilizing tube, one end of the sixth resistor is connected to the cathode of the second voltage stabilizing tube, and the other end of the second capacitor and the other end of the sixth resistor are grounded.
In some embodiments, the voltage detection unit includes a fourth voltage regulator, a seventh resistor, and a first switch, wherein,
the cathode of the fourth voltage stabilizing tube is connected with the first end of the voltage detection unit, the anode of the fourth voltage stabilizing tube and one end of the seventh resistor are connected with the second end of the voltage detection unit, the other end of the seventh resistor is connected with one end of the first switch, and the other end of the first switch is connected with a 5V power supply.
In some embodiments, the voltage detection unit further includes an eighth resistor and a third capacitor, the eighth resistor is connected in series between the anode of the fourth voltage stabilizing tube and the second end of the voltage detection unit, one end of the third capacitor is connected to the second end of the voltage detection unit, and the other end of the third capacitor is grounded.
In some embodiments, the CC resistor access unit includes the CC resistor and a second switch, where one end of the second switch is an output end of the CC resistor access unit, and the other end of the second switch is connected to one end of the CC resistor, and the other end of the CC resistor is grounded.
In a second aspect, there is provided a battery management system comprising a charge wakeup detection circuit according to the first aspect.
In a third aspect, there is provided an electric vehicle comprising the battery management system according to the first aspect.
By applying the above technical scheme, the wake-up detection circuit that charges includes: the CC resistor access unit is used for accessing the CC resistor after the charging gun is connected with the charging port; the charging detection unit is used for sending a control signal to the wake-up control unit after detecting that the charging gun is connected with the charging port; the wake-up control unit is used for receiving the control signal, generating a wake-up signal for waking up the battery management system, and converting the wake-up signal into a low-level signal in the charging process; the voltage detection unit is used for acquiring a voltage detection signal of the CC resistor in the charging process; the first end of the charging detection unit and the first end of the voltage detection unit are connected to the output end of the CC resistor access unit, the second end of the charging detection unit is connected with the first end of the wake-up control unit, the second end of the wake-up control unit is the output end of the wake-up signal, and the second end of the voltage detection unit is the output end of the voltage detection signal, so that the BMS can enter a sleep mode under the condition that a charging gun is not pulled out after charging is completed, and the electric quantity consumption of the lead-acid storage battery is reduced; moreover, the hardware circuit is adopted for waking up, no software logic control is adopted, and the waking up speed is improved; the circuit does not use an integrated chip, has a simple structure and reduces the cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structural diagram of a charge wake-up detection circuit according to an embodiment of the present utility model;
fig. 2 is a schematic diagram illustrating a configuration of a charge wake-up detection circuit according to another embodiment of the utility model.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
An embodiment of the present application provides a wake-up detection circuit for charging, as shown in fig. 1, the circuit includes:
the CC resistor access unit 10 is used for accessing the CC resistor after the charging gun is connected with the charging port;
the charging detection unit 20 is configured to send a control signal to the wake-up control unit 30 after detecting that the charging gun is connected to the charging port;
a wake-up control unit 30 for receiving the control signal and generating a wake-up signal for waking up the battery management system, and converting the wake-up signal into a low level signal during the charging process;
a voltage detection unit 40 for acquiring a voltage detection signal of the CC resistor during the charging process;
the first end of the charging detection unit 20 and the first end of the voltage detection unit 40 are commonly connected to the output end of the CC resistor access unit 10, the second end of the charging detection unit 20 is connected to the first end of the wake-up control unit 30, the second end of the wake-up control unit 30 is the output end of the wake-up signal, and the second end of the voltage detection unit 40 is the output end of the voltage detection signal.
In this embodiment, by collecting voltage detection signals at two ends of the CC resistor, the resistance of the CC resistor may be determined.
After the charging gun is connected with the charging port, the CC resistor access unit 10 accesses the CC resistor, the charging detection unit 20 sends a control signal to the wake-up control unit 30 after detecting the access of the CC resistor, the wake-up control unit 30 can generate a wake-up signal for waking up the battery management system according to the control signal, the battery management system starts the charging process after waking up, and the voltage detection unit 40 is controlled to obtain a voltage detection signal of the CC resistor in the charging process so as to control the charging process according to the voltage detection signal. The wake-up control unit 30 can convert the wake-up signal into a low-level signal in the charging process, so that the battery management system can enter a sleep mode under the condition that the charging gun is not pulled out after the charging is completed, and the electric quantity consumption of the lead-acid storage battery is reduced.
In order to ensure the reliability of the charge detection unit 20, in some embodiments of the present application, as shown in fig. 2, the charge detection unit 20 includes a first resistor R1, a second resistor R2, a first voltage regulator D1, and a MOS transistor Q1, wherein,
one end of the first resistor R1 and the source electrode of the MOS tube Q1 are connected with a 12V power supply, the other end of the first resistor R1 and the grid electrode of the MOS tube Q1 are connected with one end of the second resistor R2, the other end of the second resistor R2 is connected with the anode of the first voltage stabilizing tube D1, the cathode of the first voltage stabilizing tube D1 is the first end of the charging detection unit 20, and the drain electrode of the MOS tube Q1 is the second end of the charging detection unit 20.
In order to ensure the reliability of the wake-up control unit 30, in some embodiments of the present application, as shown in fig. 2, the wake-up control unit 30 includes a transistor Q2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second regulator D2, and a third regulator D3, wherein,
the emitter of triode Q2 is connected with the first end of awakening control unit 30, the negative pole of third surge tube D3 and the one end of fourth resistance R4 connect in triode Q2's projecting pole altogether, the positive pole of third surge tube D3 and the one end of fifth resistance R5 connect in triode Q2's base altogether, the one end of first electric capacity C1 is connected to the other end of fifth resistance R5, the other end of fourth resistance R4 and the other end of first electric capacity C1 are all grounded, the one end of third resistance R3 is connected to triode Q2's collecting electrode, the positive pole of second surge tube D2 is connected to third resistance R3's the other end, the second end IO1 of awakening control unit 30 is connected to second surge tube D2's negative pole.
In order to reliably control the wake-up signal by the wake-up control unit 30, in some embodiments of the present application, as shown in fig. 2, the transistor Q2 is turned on after receiving the control signal, and the first capacitor C1 enters a charging state, and generates a high-level signal as the wake-up signal at the second end IO1 of the wake-up control unit 30, when the duration of the first capacitor C1 in the charging state reaches a preset duration, the charging of the first capacitor C1 is completed, so that the emitter voltage and the base voltage of the transistor Q2 are equal, the transistor Q2 is turned off, and the high-level signal is turned into a low-level signal, and since the second end IO1 of the wake-up control unit 30 becomes a low level, after the charging is completed, the battery management system can also enter a sleep mode under the condition that the charging gun is not pulled out, thereby reducing the power consumption of the lead-acid battery, and the circuit is in a zero-current working mode, and also protecting the lead-acid battery. And the hardware circuit is adopted for waking up, no software logic control is adopted, and the waking-up speed is improved.
In order to further improve the reliability of the wake-up control unit 30, in some embodiments of the present application, as shown in fig. 2, the wake-up control unit 30 further includes a second capacitor C2 and a sixth resistor R6, one end of the second capacitor C2 is connected to the anode of the second voltage stabilizing tube D2, one end of the sixth resistor R6 is connected to the cathode of the second voltage stabilizing tube D2, and the other end of the second capacitor C2 and the other end of the sixth resistor R6 are grounded.
In this embodiment, the second capacitor C2 and the sixth resistor R6 may be used to perform filtering, so as to improve the stability of the wake-up signal.
In order to secure the reliability of the voltage detection unit 40, in some embodiments of the present application, as shown in fig. 2, the voltage detection unit 40 includes a fourth regulator tube D4, a seventh resistor R7, and a first switch J1, wherein,
the cathode of the fourth voltage stabilizing tube D4 is connected with the first end of the voltage detecting unit 40, the anode of the fourth voltage stabilizing tube D4 and one end of the seventh resistor R7 are connected with the second end IO2 of the voltage detecting unit 40, the other end of the seventh resistor R7 is connected with one end of the first switch J1, and the other end of the first switch J1 is connected with a 5V power supply.
In this embodiment, after the battery management system is awakened based on the wake-up signal, the charging process may be started by closing the first switch J1.
In order to improve the reliability of the voltage detection unit 40, in some embodiments of the present application, as shown in fig. 2, the voltage detection unit 40 further includes an eighth resistor R8 and a third capacitor C3, the eighth resistor R8 is connected in series between the anode of the fourth voltage stabilizing tube D4 and the second end IO2 of the voltage detection unit 40, one end of the third capacitor C3 is connected to the second end IO2 of the voltage detection unit 40, and the other end of the third capacitor C3 is grounded.
In this embodiment, the eighth resistor R8 and the third capacitor C3 may be used to perform filtering, so as to improve the stability of the voltage detection signal.
In order to ensure the reliability of the CC resistor accessing unit 10, in some embodiments of the present application, as shown in fig. 2, the CC resistor accessing unit 10 includes a CC resistor Rcc and a second switch J2, one end of the second switch J2 is an output end of the CC resistor accessing unit 10, the other end of the second switch J2 is connected to one end of the CC resistor Rcc, and the other end of the CC resistor Rcc is grounded.
In this embodiment, after the charging gun is connected to the charging port, the second switch J2 is closed, so as to access the CC resistor.
The following describes the operation principle of the charge wake-up detection circuit in the embodiment of the present application with reference to fig. 2.
As shown in fig. 2, after the charging gun is connected to the charging port of the vehicle, that is, the second switch J2 is closed, the CC resistor Rcc is connected to enable the first resistor R1, the second resistor R2, the first voltage stabilizing tube D1 and the CC resistor Rcc to form a first loop, the gate voltage of the MOS transistor Q1 is reduced to the voltage division of the second resistor R2 and the CC resistor Rcc in the first loop, the MOS transistor Q1 is turned on, after the MOS transistor Q1 is turned on, the emitter voltage of the transistor Q2 is raised, so that the transistor Q2 is turned on, after being filtered by the third resistor R3 and the second capacitor C2, a high level signal serving as a wake-up signal is generated at the second end IO1 of the wake-up control unit 30, and the battery management system is woken up based on the wake-up signal and enables the first switch J1 to be closed to output a 5V power, so that the seventh resistor R7, the fourth voltage stabilizing tube D4 and the CC resistor CC form a second loop.
The CC resistor Rcc and the fourth voltage stabilizing tube D4 generate a voltage division value in the second loop, the voltage division value is filtered by the eighth resistor R8 and the third capacitor C3 and then used as a voltage detection signal, and the battery management system can collect the voltage detection signal from the second end IO2 of the voltage detection unit 40, determine the connection state of the charging gun according to the voltage detection signal, and control the charging process.
After the triode Q2 is turned on, the first capacitor C1 enters a charging state, along with the charging process of the first capacitor C1, the base voltage of the triode Q2 gradually rises, when the charging of the first capacitor C1 is completed, the emitter voltage and the base voltage of the triode Q2 are equal, the triode Q2 is turned off, the second end IO1 of the wake-up control unit 30 is restored to a low level, and at this time, the first capacitor C1 is in a discharging state. After the electric vehicle is charged, the battery management system can make the system enter the sleep mode by sending an instruction, and the wake-up point can keep low-level output because the second end IO1 of the wake-up control unit 30 is restored to the low-level state, so that the battery management system is not hindered from entering the sleep mode.
By applying the above technical scheme, the wake-up detection circuit that charges includes: the CC resistor access unit is used for accessing the CC resistor after the charging gun is connected with the charging port; the charging detection unit is used for sending a control signal to the wake-up control unit after detecting that the charging gun is connected with the charging port; the wake-up control unit is used for receiving the control signal, generating a wake-up signal for waking up the battery management system, and converting the wake-up signal into a low-level signal in the charging process; the voltage detection unit is used for acquiring a voltage detection signal of the CC resistor in the charging process; the first end of the charging detection unit and the first end of the voltage detection unit are connected to the output end of the CC resistor access unit, the second end of the charging detection unit is connected with the first end of the wake-up control unit, the second end of the wake-up control unit is the output end of the wake-up signal, and the second end of the voltage detection unit is the output end of the voltage detection signal, so that the BMS can enter a sleep mode under the condition that a charging gun is not pulled out after charging is completed, and the electric quantity consumption of the lead-acid storage battery is reduced; moreover, the hardware circuit is adopted for waking up, no software logic control is adopted, and the waking up speed is improved; the circuit does not use an integrated chip, has a simple structure and reduces the cost.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature, and in the description of the utility model, "a plurality" means two or more, unless otherwise specifically and clearly defined.
In the present utility model, unless explicitly specified and limited otherwise, the terms "access", "connected", and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.
Claims (10)
1. A wake-up-to-charge detection circuit, the circuit comprising:
the CC resistor access unit is used for accessing the CC resistor after the charging gun is connected with the charging port;
the charging detection unit is used for sending a control signal to the wake-up control unit after detecting that the charging gun is connected with the charging port;
the wake-up control unit is used for receiving the control signal and generating a wake-up signal for waking up the battery management system, and converting the wake-up signal into a low-level signal in the charging process;
the voltage detection unit is used for acquiring a voltage detection signal of the CC resistor in the charging process;
the first end of the charging detection unit and the first end of the voltage detection unit are connected to the output end of the CC resistor access unit, the second end of the charging detection unit is connected with the first end of the wake-up control unit, the second end of the wake-up control unit is the output end of the wake-up signal, and the second end of the voltage detection unit is the output end of the voltage detection signal.
2. The circuit of claim 1, wherein the charge detection unit comprises a first resistor, a second resistor, a first voltage regulator tube, and a MOS tube, wherein,
one end of the first resistor and the source electrode of the MOS tube are connected with a 12V power supply, the other end of the first resistor and the grid electrode of the MOS tube are connected with one end of the second resistor, the other end of the second resistor is connected with the anode of the first voltage stabilizing tube, the cathode of the first voltage stabilizing tube is the first end of the charging detection unit, and the drain electrode of the MOS tube is the second end of the charging detection unit.
3. The circuit of claim 1, wherein the wake-up control unit comprises a triode, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second voltage regulator, and a third voltage regulator, wherein,
the emitter of triode is connected the first end of awakening control unit, the negative pole of third voltage regulator with the one end of fourth resistance is commonly connected in the emitter of triode, the positive pole of third voltage regulator with the one end of fifth resistance is commonly connected in the base of triode, the other end of fifth resistance is connected the one end of first electric capacity, the other end of fourth resistance with the other end of first electric capacity is all grounded, the collecting electrode of triode is connected the one end of third resistance, the other end of third resistance is connected the positive pole of second voltage regulator, the negative pole of second voltage regulator is connected the second end of awakening control unit.
4. The circuit of claim 3 wherein said transistor is turned on after receiving said control signal and causes said first capacitor to enter a charged state and generates a high level signal at a second terminal of said wake-up control unit as said wake-up signal, said transistor being turned off and causing said high level signal to turn into a low level signal when a duration of said first capacitor in a charged state reaches a predetermined duration.
5. The circuit of claim 3, wherein the wake-up control unit further comprises a second capacitor and a sixth resistor, wherein one end of the second capacitor is connected to the anode of the second voltage regulator tube, one end of the sixth resistor is connected to the cathode of the second voltage regulator tube, and the other end of the second capacitor and the other end of the sixth resistor are grounded.
6. The circuit of claim 1, wherein the voltage detection unit comprises a fourth voltage regulator, a seventh resistor, and a first switch, wherein,
the cathode of the fourth voltage stabilizing tube is connected with the first end of the voltage detection unit, the anode of the fourth voltage stabilizing tube and one end of the seventh resistor are connected with the second end of the voltage detection unit, the other end of the seventh resistor is connected with one end of the first switch, and the other end of the first switch is connected with a 5V power supply.
7. The circuit of claim 6, wherein the voltage detection unit further comprises an eighth resistor and a third capacitor, the eighth resistor being connected in series between the anode of the fourth voltage regulator tube and the second terminal of the voltage detection unit, one terminal of the third capacitor being connected to the second terminal of the voltage detection unit, the other terminal of the third capacitor being grounded.
8. The circuit of claim 1, wherein the CC resistor access unit comprises the CC resistor and a second switch, one end of the second switch is an output end of the CC resistor access unit, the other end of the second switch is connected to one end of the CC resistor, and the other end of the CC resistor is grounded.
9. A battery management system comprising a wake-up-to-charge detection circuit as claimed in any one of claims 1 to 8.
10. An electric vehicle comprising the battery management system of claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222972639.9U CN219096505U (en) | 2022-11-08 | 2022-11-08 | Charging awakening detection circuit, battery management system and electric automobile |
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| CN202222972639.9U CN219096505U (en) | 2022-11-08 | 2022-11-08 | Charging awakening detection circuit, battery management system and electric automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117261667A (en) * | 2023-11-22 | 2023-12-22 | 广汽埃安新能源汽车股份有限公司 | Vehicle charging awakening control method, storage medium and electronic equipment |
| CN117498504A (en) * | 2023-12-25 | 2024-02-02 | 威胜信息技术股份有限公司 | Battery charging, discharging and power supply circuit, operation method and intelligent terminal backup battery |
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2022
- 2022-11-08 CN CN202222972639.9U patent/CN219096505U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117261667A (en) * | 2023-11-22 | 2023-12-22 | 广汽埃安新能源汽车股份有限公司 | Vehicle charging awakening control method, storage medium and electronic equipment |
| CN117498504A (en) * | 2023-12-25 | 2024-02-02 | 威胜信息技术股份有限公司 | Battery charging, discharging and power supply circuit, operation method and intelligent terminal backup battery |
| CN117498504B (en) * | 2023-12-25 | 2024-04-02 | 威胜信息技术股份有限公司 | Battery charging, discharging and power supply circuit, operation method and intelligent terminal backup battery |
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