CN211043617U - Charge-discharge current detection circuit and electronic equipment - Google Patents
Charge-discharge current detection circuit and electronic equipment Download PDFInfo
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- CN211043617U CN211043617U CN201921598302.8U CN201921598302U CN211043617U CN 211043617 U CN211043617 U CN 211043617U CN 201921598302 U CN201921598302 U CN 201921598302U CN 211043617 U CN211043617 U CN 211043617U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model relates to a power technical field discloses a charge-discharge current detection circuit and electronic equipment. The charge and discharge current detection circuit includes: the sampling circuit is used for being connected with the battery at a voltage sampling node, and discharging current or charging current of the battery flows through the sampling circuit through the voltage sampling node so that the sampling circuit generates battery voltage at the voltage sampling node; the operational amplifier circuit comprises a first input end, a second input end and a first output end, wherein the first input end is connected to the voltage sampling node, the second input end is used for being applied with reference voltage, and the operational amplifier circuit is used for obtaining output voltage through the first output end according to the battery voltage and the reference voltage. The discharging current or the charging current of the battery can be obtained by collecting the output voltage, so that the charging and discharging current detection circuit provided by the embodiment can realize the detection of the discharging current and the charging current.
Description
Technical Field
The utility model relates to a power technical field especially relates to a charge-discharge current detection circuit and electronic equipment.
Background
Currently, many electronic products use a secondary battery such as a lithium battery as a power supply source. Generally, an electronic product needs to detect a charging current and a discharging current of a battery to determine whether the battery works in a normal state, so as to avoid potential safety hazards and loss caused by long-time working in an abnormal state.
The conventional art provides a battery detection circuit for detecting a discharge current provided by a battery to a load circuit, and specifically, the battery detection circuit includes a sampling resistor and an amplifying circuit. When the battery discharges to the load circuit, the discharge current flows through the sampling resistor, sampling voltage is generated at two ends of the sampling resistor, and the sampling voltage is transmitted to the microprocessor for analysis after being processed by the amplifying circuit.
However, when the battery is charged, the direction of the current flowing through the sampling resistor is opposite to the direction of the current flowing through the sampling resistor by the discharge current, and thus, when the discharge current flows through the sampling resistor, the voltages at the two ends of the sampling resistor are positive, negative, and negative, but when the charge current flows through the sampling resistor, the voltages at the two ends of the sampling resistor are positive, negative, and since the discharge circuit cannot process the sampling voltage that is positive, negative, and negative, the conventional battery detection circuit cannot detect the charge current when the battery is charged.
Disclosure of Invention
In order to solve the technical problem, an object of the embodiments of the present invention is to provide a charging/discharging current detection circuit and an electronic device, which can realize the detection of the charging current and the discharging current.
In a first aspect, the utility model provides a charge-discharge current detection circuit, include:
a sampling circuit including a voltage sampling node, the sampling circuit being connected in common with the battery at the voltage sampling node, a discharge current or a charge current of the battery flowing through the sampling circuit through the voltage sampling node, such that the sampling circuit generates a battery voltage at the voltage sampling node;
the operational amplifier circuit comprises a first input end, a second input end and a first output end, wherein the first input end is connected to the voltage sampling node, the second input end is used for being applied with reference voltage, and the operational amplifier circuit is used for obtaining output voltage through the first output end according to the battery voltage and the reference voltage.
Optionally, the charging and discharging current detection circuit further includes a reference voltage circuit, and the reference voltage circuit is connected to the second input terminal and configured to provide a reference voltage.
Optionally, the charge and discharge current detection circuit further includes a first current limiting circuit, and the first current limiting circuit is connected between the voltage sampling node and the first input terminal.
Optionally, the charge and discharge current detection circuit further includes a second current limiting circuit, and the second current limiting circuit is connected to the second input terminal.
Optionally, the charge and discharge current detection circuit further includes a calibration circuit, and the calibration circuit is connected between the first input terminal and the second input terminal, and is configured to calibrate the operational amplifier circuit, so that the first output terminal generates an offset voltage.
Optionally, the calibration circuit includes a switch circuit, the switch circuit includes a switch input terminal, a switch output terminal and a switch control terminal, the switch input terminal is connected to the first input terminal, the switch output terminal is connected to the second input terminal, the switch control terminal is used for inputting a control signal, and the control signal is used for controlling the on-off state of the switch circuit.
Optionally, the calibration circuit further comprises:
a first voltage dividing circuit, one end of the first voltage dividing circuit being connected to the switch control end;
and a second voltage divider circuit, one end of which is connected to the other end of the first voltage divider circuit, and the other end of which is grounded, wherein the control signal is applied to one end of the second voltage divider circuit.
Optionally, the operational amplifier circuit includes:
the operational amplifier comprises an inverting input end, a non-inverting input end and an operational amplifier output end, wherein the inverting input end is the first input end, the non-inverting input end is the second input end, and the operational amplifier output end is the first output end;
and the feedback circuit is connected between the inverting input end and the operational amplifier output end.
Optionally, the charge and discharge current detection circuit further includes a filter circuit, and the filter circuit is connected to the first output end of the operational amplifier circuit.
In a second aspect, the present invention provides an electronic device, including any one of the charge and discharge current detection circuit
The embodiment of the utility model provides a beneficial effect is: different from the prior art, in the charging and discharging current detection circuit provided by the embodiment of the utility model, the sampling circuit is used for being connected to the voltage sampling node together with the battery, and the discharging current or the charging current of the battery flows through the sampling circuit through the voltage sampling node, so that the sampling circuit generates the battery voltage at the voltage sampling node; the operational amplifier circuit comprises a first input end, a second input end and a first output end, wherein the first input end is connected to the voltage sampling node, the second input end is used for being applied with reference voltage, and the operational amplifier circuit is used for obtaining output voltage through the first output end according to the voltage of the battery and the reference voltage, so that the output voltage is analyzed, and the discharging current or the charging current of the battery can be obtained. Therefore, the charging and discharging current detection circuit provided by the embodiment can realize the detection of the discharging current and the charging current.
Drawings
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a charging/discharging current detection circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a charging/discharging current detection circuit according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a charging/discharging current detection circuit according to yet another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a charging/discharging current detection circuit according to yet another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a charging/discharging current detection circuit according to yet another embodiment of the present invention.
Detailed Description
To facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and detailed description. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the utility model provides an electronic equipment can be constructed into arbitrary suitable and have the electronic product of specific function, for example, electronic equipment can be power equipment, robot, intelligent household equipment, PDA, panel computer, MP4 or smart mobile phone etc..
Referring to fig. 1, fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. As shown in fig. 1, the electronic device 100 includes a battery 10, a load circuit 20, a switch module 30, a charge/discharge current detection circuit 40, and an analog-to-digital conversion circuit 50.
The battery 10 is used to provide power, and may be any rechargeable battery, such as a lead-acid battery (the electromotive force between the plates is about 2V), a nickel-cadmium battery (the open circuit voltage is about 1.2V), a nickel-metal hydride battery (the open circuit voltage is about 3.6V), a lithium polymer battery (the open circuit voltage is about 3.6V), and so on.
The load circuit 20 is connected to the battery 10 for normal operation according to the power supply, and the load circuit 20 and the charging and discharging current detecting circuit 40 are connected together at a voltage sampling node. The load circuit 20 is a main operating circuit of the electronic device 100. When the electronic device 100 has different functions, the load circuit 20 also has different functions, and the load circuit 20 is also configured with different circuit structures, for example, when the electronic device 100 is a power device, the load circuit 20 may be any suitable type of power circuit, wherein the power circuit may be composed of a rectifier filter circuit, a PFC circuit, an isolation converter circuit, and the like. When the electronic device 100 is a robot, the load circuit 20 may be a driving circuit for driving a motor to rotate, and the driving circuit may be a half-bridge driving circuit or a full-bridge driving circuit, etc.
The switch module 30 is connected to the battery 10 and is also connected to the voltage sampling node together with the charge and discharge current detection circuit 40, and when the switch module 30 is turned off, the discharge current flows through the load circuit 20 and the charge and discharge current detection circuit 40, respectively, and when the switch module 30 is turned on, the charge current flows through the charge and discharge current detection circuit 40 and the battery 10, respectively. The switch module 30 may be any power electronic component, such as a field effect transistor MOSFET, an insulated gate bipolar transistor igbt, a thyristor SCR, a gate turn-off thyristor GTO, a power transistor GTR, or any common switch, such as a contactor, a relay, a delay switch, a photoelectric switch, a tact switch, a proximity switch, or any combination thereof.
The charge and discharge current detection circuit 40 is connected between the load circuit 20 and the analog-to-digital conversion circuit 50, detects the charge current or the discharge current of the load circuit 20, and outputs the detection data to the analog-to-digital conversion circuit 50, and the analog-to-digital conversion circuit 50 processes the detection data to obtain a specific numerical value, so that the data of the charge and discharge current can be obtained. The analog-to-digital conversion circuit 50 may be an analog-to-digital converter working alone, or an analog-to-digital conversion circuit integrated inside a Microprocessor (MCU).
In this embodiment, the battery 10 provides a power supply for the load circuit 20, the charging/discharging current detection circuit 40 detects a charging current or a discharging current of the load circuit 20, and the analog-to-digital conversion circuit 50 processes the detected data to obtain a specific value of the charging current or the discharging current of the load circuit 20, so as to understand that if the charging current or the discharging current is greater than a preset threshold, the charging of the battery 10 may be immediately stopped or an electric energy transmission path between the circuit 10 and the load circuit 20 may be cut off, so as to protect the load circuit 20 and avoid potential safety hazards.
Referring to fig. 2, the charging/discharging current detecting circuit 40 includes a sampling circuit 41 and an operational amplifier circuit 42, the sampling circuit 41 includes a voltage sampling node 40a, the sampling circuit 41 and the battery 10 are commonly connected to the voltage sampling node 40a, and the discharging current or the charging current of the battery 10 flows through the sampling circuit 41 through the voltage sampling node 40a, so that the sampling circuit 41 generates a battery voltage at the voltage sampling node 40 a; the operational amplifier circuit 42 includes a first input terminal, a second input terminal, and a first output terminal, the first input terminal is connected to the voltage sampling node 40a, the second input terminal is used for being applied with a reference voltage, and the operational amplifier circuit 42 is used for obtaining an output voltage through the first output terminal according to the battery voltage and the reference voltage.
When the electronic device 100 is operating normally, the switch module 30 is in an off state, the battery 10 discharges to pass a discharge current through the load circuit 20 and the charge and discharge current detection circuit 40 in sequence, the discharge current flows into the voltage sampling circuit 41 at the voltage sampling node 40a to generate a battery voltage at the voltage sampling node 40a, since the discharge current flows from one end of the sampling circuit 41 connected to the voltage sampling node 40a to one end of the sampling circuit 41 connected to GND, a battery voltage positive to GND is generated at the voltage sampling node 40a, the battery voltage is applied to the first input end of the operational amplifier circuit 42, the reference voltage is applied to the second input end of the operational amplifier circuit 42, and the operational amplifier circuit 42 amplifies the battery voltage and the reference voltage, the first output end of the operational amplifier circuit 42 outputs the output voltage, the output voltage is processed by the analog-to-digital conversion circuit 50 to obtain a sampling voltage, and the sampling voltage has a certain relationship with the battery voltage and the reference voltage, so that the specific value of the battery voltage can be calculated according to the certain relationship, and the specific value of the discharge current can be obtained.
When the electronic device 100 is in a state where the external power source charges the battery 10, the switch module 30 is in a closed state, a charging current flows through the charging and discharging current detection circuit 40 and the battery 10 in sequence to charge the battery 10, the charging current flows out of the voltage sampling circuit 41 at the voltage sampling node 40a to generate a battery voltage at the voltage sampling node 40a, since the discharging current flows from one end of the sampling circuit 41 connected to GND to one end of the sampling circuit 41 connected to the voltage sampling node 40a, a battery voltage negative to GND is generated at the voltage sampling node 40a, the battery voltage is applied to the first input end of the operational amplifier circuit 42, and the reference voltage is applied to the second input end of the operational amplifier circuit 42, as described above, in this case, it is also possible to calculate a specific value of the battery voltage and obtain a specific value of the charging current.
It is understood that by applying a reference voltage to the second input terminal of the operational amplifier circuit 42 and applying a battery voltage to the first input terminal of the operational amplifier circuit 42, it can be seen from the above analysis that whether the battery voltage is a battery voltage that is positive to GND when the battery 10 is discharged or a battery voltage that is negative to GND when the battery 10 is charged, a specific value of the battery voltage can be calculated and a specific value of the discharge current can be obtained by configuring the reference voltage applied to the second input terminal of the operational amplifier circuit 42 so that the operational amplifier circuit 42 outputs an output voltage having a certain relationship with the battery voltage and the reference voltage according to the battery voltage and the reference voltage. Therefore, the charging/discharging current detection circuit 40 can detect the discharging current and the charging current, and can compare the discharging current or the charging current with the corresponding safety current to determine whether the charging state or the discharging state of the battery is normal.
In some embodiments, referring to fig. 3, the charging/discharging current detecting circuit 40 further includes a reference voltage circuit 43, a first current limiting circuit 44, a second current limiting circuit 45 and a filter circuit 46.
The reference voltage circuit 43 is connected to the second input terminal, and is configured to provide a reference voltage, where a user may adjust the reference voltage circuit 43 according to a service requirement, so that the reference voltage circuit outputs the reference voltage meeting the service requirement.
The first current limiting circuit 44 is connected between the voltage sampling node 40a and the first input terminal of the operational amplifier circuit 42, and the first current limiting circuit 44 is used for performing current limiting processing on the input sampled voltage, so as to effectively protect the operational amplifier circuit 42.
The second current limiting circuit 45 is connected to a second input terminal of the operational amplifier circuit 42, and the second current limiting circuit 45 is configured to perform a current limiting process on the input sampling voltage, so as to effectively protect the operational amplifier circuit 42.
The filter circuit 46 is connected to the first output terminal of the operational amplifier circuit 42, and the filter circuit 46 is configured to filter the output voltage generated by the operational amplifier circuit 42 to obtain a more accurate analog signal, so that the analog-to-digital conversion circuit 50 obtains a more accurate output voltage.
The operational amplifier circuit 42 provided in this embodiment can be designed into various circuit structures, and in some embodiments, with reference to fig. 3, the operational amplifier circuit 42 includes: an operational amplifier 421 and a feedback circuit 422.
The operational amplifier 421 includes an inverting input terminal, a non-inverting input terminal, and an operational amplifier output terminal, where the inverting input terminal is the first input terminal, the non-inverting input terminal is the second input terminal, and the operational amplifier output terminal is the first output terminal.
A feedback circuit 422 is connected between the inverting input and the op-amp output.
When the battery voltage is applied to the inverting input terminal of the operational amplifier 421 through the first current limiting circuit 44, the battery voltage is processed by the feedback circuit 422 and the operational amplifier 421, and an output voltage is generated at the operational amplifier output terminal of the operational amplifier 421.
It is understood that the reference voltage circuit 43, the first current limiting circuit 44, the second current limiting circuit 45 and the filtering circuit 46 can be added or deleted according to specific service requirements, and are not limited to the specific implementation described in fig. 3 or the embodiment.
In general, considering that the op-amp circuit is easily affected by process, environment, temperature, and the like, the op-amp circuit is easily generates an offset voltage, and the offset voltage is generally fixed and constant. If the battery voltage is calculated and analyzed directly from the sampled output voltage, there will be an error in the analysis result. Therefore, in order to obtain a more accurate battery voltage, the embodiment of the present invention may correct the offset voltage in advance. In some embodiments, referring to fig. 4, the charging and discharging current detecting circuit 40 further includes a calibration circuit 47, and the calibration circuit 47 is connected between the first input terminal and the second input terminal.
The calibration circuit 47 is used to calibrate the op-amp circuit so that the first output terminal generates an offset voltage, for example, when the battery is not operating, the calibration circuit 47 is operated, and then the calibration circuit 47 activates the op-amp circuit to generate an offset voltage Vos, which is transmitted to the analog-to-digital conversion circuit 50, and the analog-to-digital conversion circuit 50 records the offset voltage Vos. When the battery is in operation, i.e. the battery is discharged or charged, the calibration circuit 47 is not operated, at this time, the operational amplifier circuit 42 generates the output voltage Vout, the analog-to-digital conversion circuit 50 records the output voltage Vout, and then when the battery voltage is analyzed according to the output voltage Vout, the analog-to-digital conversion circuit 50 subtracts the offset voltage Vos from the output voltage Vout to obtain a corrected correction voltage V01, so far, the module conversion circuit 50 has eliminated the error generated by the operational amplifier circuit, and is ready for more accurate calculation of the battery voltage.
In some embodiments, referring to fig. 5, the calibration circuit 47 includes a switch circuit 471, a first voltage divider circuit 472, and a second voltage divider circuit 473.
The switch circuit 471 includes a switch input terminal, a switch output terminal, and a switch control terminal, the switch input terminal is connected to the first input terminal, the switch output terminal is connected to the second input terminal, the switch control terminal is used for inputting a control signal, and the control signal is used for controlling the on-off state of the switch circuit.
One end of the first voltage dividing circuit 472 is connected to the switch control end;
a second voltage dividing circuit 473 is connected to the other end of the first voltage dividing circuit at one end, and the other end of the second voltage dividing circuit is grounded, wherein the control signal is applied to one end of the second voltage dividing circuit.
When the calibration circuit 47 works, first, a control signal as a high level signal is input to the calibration circuit 47, so that after the high level signal is subjected to voltage division processing by the first voltage dividing circuit 472 and the second voltage dividing circuit 473, a high voltage is obtained at the switch control terminal of the switch circuit 471, so that the high voltage causes the switch circuit 471 to work in a conducting state, so that the non-inverting input terminal and the inverting input terminal of the operational amplifier circuit 42 are shorted to be the same, and at this time, when the output terminal of the operational amplifier circuit 42 outputs a voltage, the voltage is an offset voltage.
For the convenience of the reader to understand the embodiment of the present invention provides a charge and discharge current detection circuit, and below, this embodiment makes a detailed description on the working principle of the charge and discharge current detection circuit with reference to fig. 6, specifically as follows:
in the present embodiment, the resistances of the resistors R1 to R12 are: 0.1R, 90.9R, 909R, 1R, 90.9R, 909R, 10K, 1K.
When the battery is discharged, in which the switching module is turned off, the discharge current of the battery flows into the charge and discharge current detection circuit 100 through the load circuit. Specifically, the discharge current respectively flows through the sampling circuit 41 composed of the resistor R1 and the resistor R2, and also flows through the operational amplifier 421 through the first current limiting circuit 44, and after the processing of the operational amplifier 421, the output voltage is obtained, and after the processing of the output voltage through the filter circuit 46 composed of the resistor R12 and the capacitor C2, the output voltage is output to the analog-to-digital conversion circuit 50 or the microprocessor.
According to the principle of virtual short and virtual break, the following are calculated: the voltage collected by the analog-to-digital converter is Vout — V _ REF-10Vi n, and the operating current I of the whole circuit is (V _ REF-Uout)/(10 × 0.05), where Vout is the output voltage, V _ REF is the reference voltage, and Vi n is the battery voltage.
When the battery is charged, wherein the switch module is closed, the charging current of the battery may flow into the charging and discharging current detection circuit 100. Specifically, the charging current respectively flows through the sampling circuit 41 composed of the resistor R1 and the resistor R2, and also flows through the operational amplifier 421 through the first current limiting circuit 44, and after the processing of the operational amplifier 421, the output voltage is obtained, and after the processing of the output voltage through the filter circuit 46 composed of the resistor R12 and the capacitor C2, the output voltage is output to the analog-to-digital conversion circuit 50 or the microprocessor.
According to the principle of virtual short and virtual break, the following are calculated: the voltage collected by the analog-to-digital converter is Vout — V _ REF-10Vi n, and the operating current I of the whole circuit is (V _ REF-Uout)/(10 × 0.05), where Vout is the output voltage, V _ REF is the reference voltage, and Vi n is the battery voltage.
When the calibration circuit is operating, the microprocessor or the analog-to-digital converter outputs a high-level control signal, so that the switch Q1 is turned on, so that the non-inverting input terminal and the inverting input terminal of the operational amplifier are short-circuited, the operational amplifier outputs an offset voltage, and the analog-to-digital conversion circuit 50 subtracts the offset voltage Vos from the output voltage Vout to obtain a corrected voltage V01, so far, the module conversion circuit 50 has eliminated the error generated by the operational amplifier circuit, and is ready for more accurate calculation of the battery voltage.
Finally, it is to be understood that the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are intended as additional limitations on the scope of the invention, as these embodiments are provided so that the disclosure will be thorough and complete. In addition, under the idea of the present invention, the above technical features are combined with each other continuously, and many other variations of the present invention in different aspects as described above are considered as the scope of the present invention; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A charge-discharge current detection circuit is applied to a battery, and is characterized by comprising:
the sampling circuit comprises a voltage sampling node, the sampling circuit and the battery are connected together at the voltage sampling node, and the discharging current or the charging current of the battery flows through the sampling circuit through the voltage sampling node so that the sampling circuit generates a battery voltage at the voltage sampling node;
the operational amplifier circuit comprises a first input end, a second input end and a first output end, wherein the first input end is connected to the voltage sampling node, the second input end is used for being applied with reference voltage, and the operational amplifier circuit is used for obtaining output voltage through the first output end according to the battery voltage and the reference voltage.
2. The charging and discharging current detecting circuit according to claim 1, further comprising a reference voltage circuit connected to said second input terminal for providing a reference voltage.
3. The charge and discharge current detection circuit according to claim 1, further comprising a first current limiting circuit connected between the voltage sampling node and the first input terminal.
4. The charging and discharging current detection circuit according to claim 1, further comprising a second current limiting circuit connected to the second input terminal.
5. The charging and discharging current detection circuit according to any one of claims 1 to 4, further comprising a calibration circuit connected between the first input terminal and the second input terminal for calibrating the operational amplifier circuit such that the first output terminal generates an offset voltage.
6. The charging and discharging current detecting circuit according to claim 5, wherein the calibration circuit comprises a switch circuit, the switch circuit comprises a switch input terminal, a switch output terminal and a switch control terminal, the switch input terminal is connected to the first input terminal, the switch output terminal is connected to the second input terminal, the switch control terminal is used for inputting a control signal, and the control signal is used for controlling a switch state of the switch circuit.
7. The charge-discharge current detection circuit according to claim 6, wherein the calibration circuit further comprises:
a first voltage dividing circuit, one end of the first voltage dividing circuit being connected to the switch control end;
and a second voltage divider circuit, one end of which is connected to the other end of the first voltage divider circuit, and the other end of which is grounded, wherein the control signal is applied to one end of the second voltage divider circuit.
8. The charging and discharging current detection circuit according to any one of claims 1 to 4, wherein the operational amplifier circuit comprises:
the operational amplifier comprises an inverting input end, a non-inverting input end and an operational amplifier output end, wherein the inverting input end is the first input end, the non-inverting input end is the second input end, and the operational amplifier output end is the first output end;
and the feedback circuit is connected between the inverting input end and the operational amplifier output end.
9. The charging and discharging current detection circuit according to any one of claims 1 to 4, further comprising a filter circuit connected to the first output terminal of the operational amplifier circuit.
10. An electronic device comprising the charge-discharge current detection circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921598302.8U CN211043617U (en) | 2019-09-24 | 2019-09-24 | Charge-discharge current detection circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921598302.8U CN211043617U (en) | 2019-09-24 | 2019-09-24 | Charge-discharge current detection circuit and electronic equipment |
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| CN211043617U true CN211043617U (en) | 2020-07-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928350A (en) * | 2021-01-25 | 2021-06-08 | 深圳蓝信电气有限公司 | In-situ detection and activation method for storage battery |
| CN113848481A (en) * | 2021-09-28 | 2021-12-28 | 杭州微慕科技有限公司 | Single-power-supply bidirectional current signal detection circuit applied to battery management system |
| CN116470620A (en) * | 2023-05-13 | 2023-07-21 | 深圳市汇一技研有限公司 | Discharging circuit, battery management module, power supply module and electric equipment |
-
2019
- 2019-09-24 CN CN201921598302.8U patent/CN211043617U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928350A (en) * | 2021-01-25 | 2021-06-08 | 深圳蓝信电气有限公司 | In-situ detection and activation method for storage battery |
| CN112928350B (en) * | 2021-01-25 | 2023-09-22 | 深圳蓝信电气有限公司 | In-situ detection and activation method for storage battery |
| CN113848481A (en) * | 2021-09-28 | 2021-12-28 | 杭州微慕科技有限公司 | Single-power-supply bidirectional current signal detection circuit applied to battery management system |
| CN116470620A (en) * | 2023-05-13 | 2023-07-21 | 深圳市汇一技研有限公司 | Discharging circuit, battery management module, power supply module and electric equipment |
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