CN214067296U - Charging detection circuit and electric vehicle - Google Patents
Charging detection circuit and electric vehicle Download PDFInfo
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- CN214067296U CN214067296U CN202023089399.5U CN202023089399U CN214067296U CN 214067296 U CN214067296 U CN 214067296U CN 202023089399 U CN202023089399 U CN 202023089399U CN 214067296 U CN214067296 U CN 214067296U
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Abstract
The embodiment of the utility model discloses detection circuitry and electric motor car charge. This charge detection circuit includes: the charging circuit comprises a charging signal input end, an anti-reverse module, a current limiting module and a control module, wherein the control module comprises a grounding end; the charging signal input end is electrically connected with the first end of the current limiting module, the second end of the current limiting module is electrically connected with the control module, the first end of the reverse prevention module is electrically connected with the charging signal input end and the first end of the current limiting module respectively, and the second end of the reverse prevention module is electrically connected with the grounding end. The normal detection of the charging state is ensured, and meanwhile components such as a controller and the like are effectively protected from being damaged due to the impact of negative surge voltage.
Description
Technical Field
The embodiment of the utility model provides a relate to test technical field, especially relate to a charging detection circuit and electric motor car.
Background
In a charging state detection circuit of an electric vehicle, the detection circuit is usually combined with components (such as a clamping diode) inside a controller for detection, and surge voltage is easy to cause damage to the components inside the controller and the controller.
SUMMERY OF THE UTILITY MODEL
The utility model provides a detection circuitry and electric motor car charge to realize effectively protecting components and parts such as controller and avoid negative surge voltage's impact when guaranteeing the normal detection of charged state.
In a first aspect, an embodiment of the present invention provides a charging detection circuit, which is characterized in that, include: the charging circuit comprises a charging signal input end, an anti-reverse module, a current limiting module and a control module, wherein the control module comprises a grounding end; the charging signal input end is electrically connected with the first end of the current limiting module, the second end of the current limiting module is electrically connected with the control module, the first end of the reverse prevention module is electrically connected with the charging signal input end and the first end of the current limiting module respectively, and the second end of the reverse prevention module is electrically connected with the grounding end.
Optionally, the anti-reverse module is a diode, an anode of the diode is electrically connected to the ground terminal, and a cathode of the diode is electrically connected to the charging signal input terminal and the first end of the current limiting module, respectively.
Optionally, the diode is an anti-reverse diode.
Optionally, the current limiting module is a first resistor element, a first end of the first resistor element is electrically connected to the first end of the anti-reverse module and the charging signal input end, respectively, and a second end of the first resistor element is electrically connected to the control module.
Optionally, the charging detection circuit further includes a second resistive element, a first end of the second resistive element is connected to a power supply terminal, and a second end of the second resistive element is electrically connected to the charging signal input terminal and the first end of the current limiting module, respectively.
Optionally, the charging detection circuit further includes a capacitor, a first end of the capacitor is electrically connected to the charging signal input terminal and the first end of the current limiting module, and a second end of the capacitor is electrically connected to the ground terminal.
Optionally, the control module is a single chip microcomputer.
Optionally, the charging detection circuit performs charging detection by using paired chargers, the chargers include a charging interface circuit, an output end of the charging interface circuit is electrically connected with a positive electrode of a battery pack, a negative electrode of the battery pack is connected with the ground terminal, and the charging signal input end is electrically connected with an input end of the charging interface circuit.
In a second aspect, the embodiment of the present invention further provides an electric vehicle, which includes the charging detection circuit according to the first aspect.
The utility model discloses a detection circuitry charges is provided, this detection circuitry charges includes: the charging circuit comprises a charging signal input end, an anti-reverse module, a current limiting module and a control module, wherein the control module comprises a grounding end; the charging signal input end is electrically connected with the first end of the current limiting module, the second end of the current limiting module is electrically connected with the control module, the first end of the reverse prevention module is electrically connected with the charging signal input end and the first end of the current limiting module respectively, and the second end of the reverse prevention module is electrically connected with the grounding end. The normal detection of the charging state is ensured, and meanwhile components such as a controller and the like are effectively protected from being damaged due to the impact of negative surge voltage.
Drawings
FIG. 1 is a prior art charge detection circuit;
fig. 2 is a schematic structural diagram of a charge detection circuit according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a charging detection circuit according to a second embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As described in the background art, the existing circuit for detecting in combination with the internal components of the controller has the problem of being liable to damage the controller and its components. Fig. 1 shows a charge detection circuit in the prior art. The inventor has found that the above problem occurs because, referring to fig. 1, chargers VCC and VSS pass through the following paths: VCC-internal resistance of battery pack-negative pole of controller-clamping diodes D3 and D4 in control unit-current limiting resistor R6-charger VSS form a loop, at the moment of hot plugging and unplugging charging interface, a charging detection signal end contacts with the positive pole end first with a certain probability to generate higher surge voltage, so that over-power damage of current detecting R6 resistor or clamping diode of control unit is caused, even the controller is damaged, and other potential damages are caused.
Based on the problem, the embodiment of the utility model provides a detection circuitry charges, through this detection circuitry charges, can realize effectively protecting components and parts such as controller and avoid negative surge voltage's impact when guaranteeing charged state's normal detection.
Example one
Fig. 2 is a schematic structural diagram of a charging detection circuit provided in the first embodiment of the present invention, referring to fig. 2, the charging detection circuit includes: the charging circuit comprises a charging signal input end A0, an anti-reverse module 10, a current limiting module 20 and a control module 30, wherein the control module 30 comprises a grounding end G0; the charging signal input terminal a0 is electrically connected to the first end of the current limiting module 20, the second end of the current limiting module 20 is electrically connected to the control module 30, the first end of the anti-reverse module 10 is electrically connected to the charging signal input terminal a0 and the first end of the current limiting module 20, and the second end of the anti-reverse module 10 is electrically connected to the ground terminal G0.
Wherein, the second end of the anti-reverse module 10 is grounded with the ground terminal G0 of the control module 30. The anti-reverse module 10 is used for preventing reverse and discharging pulse voltage generated by the detection loop, so as to prevent the pulse voltage from damaging other components of the circuit.
In the technical solution of this embodiment, the implementation process of the charge detection circuit is as follows: referring to fig. 2, in the charge detection, the charge signal input terminal a0 may be electrically connected to an output terminal of the charger, for example, one pin L1 of the charge plug, another pin L2 of the charge plug is electrically connected to the positive electrode of the rechargeable battery pack 40, and the negative electrode of the rechargeable battery pack 40 is electrically connected to the second terminal of the anti-reverse module 10, that is, the ground terminal. Therefore, the whole charging detection circuit forms a detection loop as follows: the voltage at the output end of the internal circuit of the charger enters the positive pole of the battery pack from a pin L1 of the charger plug, flows out to the second end of the anti-reverse module 10 through the negative pole of the battery pack, is output to another pin L2 of the charger plug from the anti-reverse module 10, and finally flows back to the internal circuit of the charger. Therefore, compared with the charging detection circuit in the prior art, the surge voltage (or pulse voltage) generated by the charging detection circuit provided by the present embodiment can be discharged through the anti-reflection module 10, and the detection circuit no longer passes through the control module 30 and the current limiting module 20, and also does not pass through the internal elements (such as the clamping diode) of the control module 30, so that the surge voltage generated by the circuit can be prevented from damaging the current limiting module 20, the control module 30, the internal elements of the control module 30, and the like. Therefore, when the charging detection port has a negative surge voltage to be connected in series, the anti-reverse module 10 can play a role in protection, so that the port circuit is effectively protected. Therefore, normal detection of the charging state can be ensured, and meanwhile, components such as a controller and the like can be effectively protected from impact of negative surge voltage. In addition, the circuit structure is simple, and the realization cost is low.
The technical scheme of this embodiment, through providing a detection circuitry that charges, this detection circuitry that charges includes: the charging circuit comprises a charging signal input end, an anti-reverse module, a current limiting module and a control module, wherein the control module comprises a grounding end; the charging signal input end is electrically connected with the first end of the current limiting module, the second end of the current limiting module is electrically connected with the control module, the first end of the reverse prevention module is electrically connected with the charging signal input end and the first end of the current limiting module respectively, and the second end of the reverse prevention module is electrically connected with the grounding end. The normal detection of the charging state is ensured, and meanwhile components such as a controller and the like are effectively protected from being damaged due to the impact of negative surge voltage.
Example two
Fig. 3 is a schematic structural diagram of a charging detection circuit provided in the second embodiment of the present invention. On the basis of the first embodiment, referring to fig. 3, optionally, the anti-reverse module 10 is a diode D1, an anode of the diode D1 is electrically connected to the ground terminal G0, and a cathode of the diode D1 is electrically connected to the charging signal input terminal a0 and the first terminal of the current limiting module 20, respectively.
The anode of the diode D1 is commonly connected to the ground terminal G0 of the control module 30. Diode D1 is used for preventing on the one hand and prevents reversing, and on the other hand is used for the pulse voltage that the detection return circuit produced, avoids pulse voltage to damage other components and parts of circuit.
Optionally, diode D1 is an anti-reverse diode.
Alternatively, referring to fig. 3, the current limiting module 20 is a first resistor element R1, a first end of the first resistor element R1 is electrically connected to the first end of the anti-reverse module 10 and the charging signal input terminal a0, respectively, and a second end of the first resistor element R1 is electrically connected to the control module 30.
The first resistance element R1 is used to limit the magnitude of the branch current, so as to prevent the control module 30 and other components from being burnt out due to excessive current.
Optionally, referring to fig. 3, the charge detection circuit further includes a second resistor element R2, a first terminal of the second resistor element R2 is connected to the power supply terminal VDD, and a second terminal of the second resistor element R2 is electrically connected to the charging signal input terminal a0 and the first terminal of the current limiting module 20, respectively.
Wherein the second resistance element R2 functions as a pull-up resistance.
Optionally, referring to fig. 3, the charge detection circuit further includes a capacitor C1, a first terminal of the capacitor C1 is electrically connected to the charge signal input terminal a0 and the first terminal of the current limiting module 20, and a second terminal of the capacitor C1 is electrically connected to the ground terminal G0.
The capacitive element C1 is used for voltage division.
Optionally, the control module 30 is a single chip microcomputer.
Specifically, in the input circuit including the first resistance element R1, the second resistance element R2, and the capacitance element C1, R1 is a current limiting resistor, and R2 is a pull-up resistor, and is at a high level when the charger plug is not inserted; when the charger plug is inserted, since the charging signal terminal of the charger plug is connected to the negative electrode, the level is pulled low, and the level is directly applied to the I/O port of the control module 30 through the first resistance element R1, so that the control module 30 can perform signal detection. The control module 30 turns off the motor driving module not to output the drive, so as to achieve the purpose of improving the charging safety.
Optionally, referring to fig. 3, the charging detection circuit performs charging detection by using a paired charger, where the charger includes a charging interface circuit 50, an output end of the charging interface circuit 50 is electrically connected to a positive electrode of the battery pack 40, a negative electrode of the battery pack 40 is connected to the ground terminal G0, and the charging signal input end a0 is electrically connected to an input end of the charging interface circuit 50.
Wherein, referring to fig. 3, the charging interface circuit 50 comprises
In the technical solution of this embodiment, the implementation process of the charge detection circuit is as follows: for example, referring to fig. 3, during the charge detection, the charge signal input terminal a0 may be electrically connected to an output terminal of the charger, for example, one pin L1 of the charge plug, another pin L2 of the charge plug is electrically connected to the positive electrode of the rechargeable battery pack 40, and the negative electrode of the rechargeable battery pack 40 is electrically connected to the anode of the diode D1, that is, to the ground terminal. Therefore, the detection loop formed by the whole charging detection circuit is as follows: the voltage VCC at the output terminal of the internal circuit of the charger enters the positive pole of the battery pack 40 from the pin L1 of the charger plug, flows out to the anode of the diode D1 through the negative pole of the battery pack 40, is output to the other pin L2 of the charger plug from the cathode of the diode D1, and finally flows back to the internal circuit of the charger. Therefore, compared with the charging detection circuit in the prior art, the surge voltage (or pulse voltage) generated by the charging detection circuit provided by the present embodiment can be discharged through the diode D1, and the detection circuit does not pass through the control module 30 and the first resistor R1 any more, and does not need to pass through the internal components of the control module 30 (such as the clamping diode), so that the surge voltage generated by the circuit can be prevented from damaging the first resistor R1, the control module 30, the internal components of the control module 30, and the like. Therefore, when the charging detection port has a negative surge voltage to be connected in series, the diode D1 can play a protection role, and the port circuit is effectively protected. Therefore, normal detection of the charging state can be ensured, and meanwhile, components such as a controller and the like can be effectively protected from impact of negative surge voltage. In addition, the circuit structure is simple, and the realization cost is low.
EXAMPLE III
The embodiment of the utility model provides an electric motor car is still provided, this electric motor car includes the utility model discloses arbitrary embodiment charge detection circuitry.
The electric vehicle may include various electric vehicles, such as an electric automobile, an electric motorcycle, an electric bicycle, a scooter, a balance car, and the like.
It should be noted that the embodiment of the present invention provides a charging detection circuit that can be integrated into an electric vehicle product, and can also be used as an independent charging detection circuit for testing charging detection of an electric vehicle and the like. The specific setting may be performed according to actual conditions, and is not specifically limited herein.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (9)
1. A charge detection circuit, comprising: the charging circuit comprises a charging signal input end, an anti-reverse module, a current limiting module and a control module, wherein the control module comprises a grounding end; the charging signal input end is electrically connected with the first end of the current limiting module, the second end of the current limiting module is electrically connected with the control module, the first end of the reverse prevention module is electrically connected with the charging signal input end and the first end of the current limiting module respectively, and the second end of the reverse prevention module is electrically connected with the grounding end.
2. The charge detection circuit according to claim 1, wherein the anti-reverse module is a diode, an anode of the diode is electrically connected to the ground terminal, and a cathode of the diode is electrically connected to the charge signal input terminal and the first terminal of the current limiting module, respectively.
3. The charge detection circuit of claim 2, wherein the diode is an anti-reverse diode.
4. The charge detection circuit according to claim 1, wherein the current limiting module is a first resistor element, a first end of the first resistor element is electrically connected to the first end of the anti-reverse module and the charge signal input end, respectively, and a second end of the first resistor element is electrically connected to the control module.
5. The charge detection circuit according to claim 1, further comprising a second resistor element, a first end of the second resistor element being connected to a power supply terminal, and a second end of the second resistor element being electrically connected to the charging signal input terminal and the first end of the current limiting module, respectively.
6. The charging detection circuit of claim 1, further comprising a capacitive element, wherein a first end of the capacitive element is electrically connected to the charging signal input terminal and the first end of the current limiting module, respectively, and a second end of the capacitive element is electrically connected to the ground terminal.
7. The charge detection circuit of claim 1, wherein the control module is a single-chip microcomputer.
8. The charging detection circuit of claim 1, wherein the charging detection circuit performs charging detection by using a paired charger, the charger includes a charging interface circuit, an output terminal of the charging interface circuit is electrically connected to a positive electrode of a battery pack, a negative electrode of the battery pack is connected to the ground terminal, and the charging signal input terminal is electrically connected to an input terminal of the charging interface circuit.
9. An electric vehicle characterized by comprising the charge detection circuit according to claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023089399.5U CN214067296U (en) | 2020-12-18 | 2020-12-18 | Charging detection circuit and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023089399.5U CN214067296U (en) | 2020-12-18 | 2020-12-18 | Charging detection circuit and electric vehicle |
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| Publication Number | Publication Date |
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| CN214067296U true CN214067296U (en) | 2021-08-27 |
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| CN202023089399.5U Active CN214067296U (en) | 2020-12-18 | 2020-12-18 | Charging detection circuit and electric vehicle |
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| CN (1) | CN214067296U (en) |
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