CN211046538U - Charging device - Google Patents
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- CN211046538U CN211046538U CN201922478336.XU CN201922478336U CN211046538U CN 211046538 U CN211046538 U CN 211046538U CN 201922478336 U CN201922478336 U CN 201922478336U CN 211046538 U CN211046538 U CN 211046538U
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Abstract
A charging device, comprising: the device comprises a power supply conversion module, an input module, a voltage detection module, a current detection module and a control module; the control module is respectively connected with the power supply conversion module, the input module, the voltage detection module and the current detection module, and the power supply conversion module is connected with the voltage detection module; the input module is used for receiving the input of a user; the control module is used for determining charging parameters according to input of a user, and controlling the power supply conversion module to charge the battery to be charged according to the determined charging parameters, the battery voltage detected by the voltage detection module and the battery charging current detected by the current detection module. The input module receives the input of a user, and the charging parameters are determined according to the input of the user, so that the charging parameters can be adjusted according to requirements, the batteries with various specifications can be charged, and the adaptive performance of the charging device is improved.
Description
Technical Field
The utility model relates to a charger technical field, concretely relates to charging parameter adjustable charging device.
Background
With the rapid development of electronic technology, the importance of the battery as an indispensable battery for electronic equipment becomes more and more significant, and the demand of users for the battery also becomes larger and larger. The rechargeable battery is widely used due to its advantages of economy, environmental protection, etc., and thus, the rapid development of the charging device is promoted.
Charging devices on the market today usually have a fixed charging cut-off voltage and charging current, i.e. the charging parameters are not adjustable. In order to improve the adaptability of the charging device, the charging device usually has a plurality of fixed charging cut-off voltages and charging currents to meet the charging requirements of a plurality of rechargeable batteries. However, the types of rechargeable batteries mounted on electronic devices in the market are increasing, and even a charging device having a plurality of fixed charging gears cannot fully meet the demand. For example, a 4.2V/2A or 5V/3A charging device is often not ideal for a 4.3V or 4.35V rechargeable battery. Or too slow a battery charge due to too low a charge current; or the battery is damaged or even the battery is ignited and exploded due to overlarge charging current.
In summary, the conventional charging device with fixed charging parameters has poor adaptability, and a charging device with adjustable charging parameters is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a charging parameter adjustable charging device for solve the poor problem of current charging device suitability.
According to a first aspect, there is provided in an embodiment a charging device comprising:
the device comprises a power supply conversion module, an input module, a voltage detection module, a current detection module and a control module;
the control module is respectively connected with the power supply conversion module, the input module, the voltage detection module and the current detection module, and the power supply conversion module is connected with the voltage detection module;
the input module is used for receiving the input of a user;
the power supply conversion module is also used for connecting an external power supply and the battery to be charged so as to obtain electric energy from the external power supply, performing boosting or voltage reduction processing on input voltage according to a charging control signal output by the control module, outputting the signal subjected to boosting or voltage reduction processing to the battery to be charged and charging the battery to be charged;
the voltage detection module is also used for connecting a battery to be charged, detecting the voltage of the battery to be charged and feeding the detected voltage back to the control module;
the current detection module is also used for connecting a battery to be charged, detecting the charging current of the battery to be charged and feeding the detected charging current back to the control module;
the control module is used for determining charging parameters according to input of a user and outputting charging control signals to the power supply conversion module according to the determined charging parameters, the detected battery voltage and the detected battery charging current.
In one embodiment, the input module includes a liquid crystal touch screen.
In one embodiment, the charging device further comprises a display module, and the display module is connected with the control module and used for displaying the charging parameters.
In one embodiment, the display module includes an L CD display screen, and the L CD display screen is connected with the DATA interface and the C L K interface of the control module.
In one embodiment, the input module comprises operation keys, the operation keys comprise an UP key gradually increasing according to the set step length and a DOWN key gradually decreasing according to the set step length, and the operation keys are connected with the control module.
In one embodiment, a power conversion module includes:
the circuit comprises a first capacitor, a transistor, a Schottky diode, an inductor and a second capacitor;
a first pole of the first capacitor is grounded;
the second pole of the first capacitor is connected with the first pole of the transistor and is used for being connected to an external power supply;
the control electrode of the transistor is connected to the control module;
the second pole of the transistor and the first pole of the inductor are connected to the cathode of the Schottky diode;
the anode of the Schottky diode is grounded;
the first pole of the second capacitor is grounded;
the second pole of the inductor and the second pole of the second capacitor are connected to the voltage detection module and are also used for being connected to the anode of the battery to be charged.
In one embodiment, the PWM interface of the control module is connected to the gate of the transistor.
In one embodiment, the voltage detection module includes:
a first resistor and a second resistor;
the first pole of the first resistor is connected to the power conversion module and is also used for being connected to the positive pole of the battery to be charged;
the second pole of the first resistor and the first pole of the second resistor are connected to the control module;
the second pole of the second resistor is grounded.
In one embodiment, the current detection module includes:
a third resistor, a fourth resistor and a third capacitor;
the first pole of the third resistor and the first pole of the fourth resistor are connected and used for being connected to the negative pole of the battery to be charged;
the second pole of the fourth resistor is grounded;
the second pole of the third resistor and the first pole of the third capacitor are connected to the control module;
the second pole of the third capacitor is grounded.
In one embodiment, the Vb interface of the control module is connected to the second pole of the first resistor and the first pole of the second resistor;
the Ichg interface of the control module is connected to the second pole of the third resistor and the first pole of the third capacitor.
The charging device according to the above embodiment includes: the device comprises a power supply conversion module, an input module, a voltage detection module, a current detection module and a control module; the control module is respectively connected with the power supply conversion module, the input module, the voltage detection module and the current detection module, and the power supply conversion module is connected with the voltage detection module; the input module is used for receiving the input of a user; the control module is used for determining charging parameters according to user input and controlling the power supply conversion module to charge the battery to be charged according to the determined charging parameters, the battery voltage detected by the voltage detection module and the battery charging current detected by the current detection module. The input module receives the user input and determines the charging parameters according to the user input, so that the charging parameters can be adjusted according to requirements, the batteries of various specifications can be charged, and the adaptive performance of the charging device is improved.
Drawings
Fig. 1 is a schematic structural diagram of a charging device according to an embodiment;
fig. 2 is a schematic structural diagram of a charging device according to yet another embodiment;
FIG. 3 is a schematic structural diagram of a charging device according to another embodiment;
fig. 4 is a schematic structural diagram of a power conversion module in the charging device according to an embodiment;
fig. 5 is a schematic structural diagram of a charging device according to yet another embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
Fig. 1 is a schematic structural diagram of a charging device according to an embodiment. As shown in fig. 1, the charging device 100 provided in this embodiment may include: the power conversion module 10, the input module 20, the voltage detection module 30, the current detection module 40, and the control module 50.
The control module 50 is connected to the power conversion module 10, the input module 20, the voltage detection module 30 and the current detection module 40, respectively, and the power conversion module 10 is connected to the voltage detection module 30.
The input module 20 is used for receiving input of a user; the power conversion module 10 is further configured to connect an external power source and a battery to be charged, so as to obtain electric energy from the external power source 60, perform voltage boosting or voltage dropping processing on an input voltage according to a charging control signal output by the control module 50, output a signal after the voltage boosting or voltage dropping processing to the battery 70 to be charged, and charge the battery 70 to be charged; the voltage detection module 30 is further configured to connect to the battery 70 to be charged, and is configured to detect a voltage of the battery 70 to be charged, and feed back the detected voltage to the control module 50; the current detection module 40 is further configured to connect to the battery 70 to be charged, and is configured to detect a charging current of the battery 70 to be charged, and feed back the detected charging current to the control module 50; the control module 50 is configured to determine a charging parameter according to a user input, and output a charging control signal to the power conversion module 10 according to the determined charging parameter and the detected battery voltage and battery charging current.
In this embodiment, the user may set charging parameters, which may include, for example, a charge cutoff voltage and a charge current, through the input module 20. The input module 20 may be, for example, a keyboard, keys, etc. The input module 20 may also be a device integrating input and display functions, and may include a liquid crystal touch screen, for example. The power conversion module 10 in this embodiment can change the output voltage according to the control signal of the control module 50, for example, a BUCK circuit can be adopted, and after the external power supply 60 is stepped down, the battery 70 to be charged is charged, so that the charging cut-off voltage that can be set by the user is [0, the output voltage of the external power supply 60 ]. The external power supply 60 in the present embodiment may employ a power adapter, for example. In an alternative embodiment, the power conversion module 10 may include a PMOS transistor, and the step-down amplitude of the power conversion module 10 may be adjusted by adjusting a Pulse Width Modulation (PWM) duty ratio of the PMOS transistor.
The control module 50 can obtain the voltage of the battery 70 to be charged through the voltage detection module 30, obtain the charging current of the battery 70 to be charged through the current detection module 40, and monitor the charging process in real time, so as to take measures in time when the voltage or the charging current is abnormal, and ensure that the charging process is performed safely. The control module 50 can also control the power conversion module 10 according to the charging parameters set by the user, and the detected battery voltage and battery charging current, so as to realize safe and fast charging. The control module 50 may be, for example, a single chip microcomputer, and technicians may flexibly configure the control logic through software.
The following describes a charging process using the charging device 100 of the present embodiment by a specific example, and assuming that the user sets the charging cut-off voltage to be 4.3V and the charging current to be 1A according to the performance parameters of the battery to be charged, the charging process may include:
(1) trickle charge process
When the voltage of the battery 70 to be charged, acquired by the control module 50 through the voltage detection module 30, is lower than 3V, which indicates that the electric quantity of the battery 70 to be charged at this time is close to 0, the trickle charge mode is entered. The control module 50 controls the power conversion module 10 to step up the output voltage. For a power conversion module 10 including PMOS transistors, the control module 50 may control the PWM duty cycles of the PMOS transistors to be gradually decreased to increase the output voltage. When the charging current of the battery 70 to be charged acquired by the control module 50 through the current detection module 40 reaches a predetermined current value of trickle charging, for example, 0.1C current (0.1C current is a current that is one tenth of the total capacity of the battery to be charged, for example, the battery capacity is 1000mAH, and 0.1C is 100mA), the control module 50 controls the output voltage of the power conversion module 10 not to be reduced any more, so that the charging current is stabilized at the predetermined current value. For a power conversion module 10 that includes PMOS transistors, the control module 50 may control the PWM duty cycles of the PMOS transistors to no longer decrease. At the moment, the current is stabilized at a preset current value, for example, 0.1C, charging is carried out, battery activation is carried out through weak current, the battery is prevented from being overheated in the charging process, and the constant current charging mode is entered until the voltage of the battery reaches more than 3V.
(2) Constant current charging process
When the voltage of the battery 70 to be charged, acquired by the control module 50 through the voltage detection module 30, is higher than 3V and lower than 4.3V, the constant current charging mode is entered. At this time, the control module 50 controls the power conversion module 10 to gradually increase the output voltage until the charging current of the battery 70 to be charged reaches the charging current 1A set by the user. For the power conversion module 10 including the PMOS transistor, the control module 50 may control the PWM duty ratio of the PMOS transistor to be gradually decreased to increase the output voltage until the charging current of the battery 70 to be charged reaches 1A set by the user. The charging current is stabilized at 1A for charging. When the charging current of the battery 70 to be charged acquired by the control module 50 through the current detection module 40 is smaller than 1A set by the user, controlling the power conversion module 10 to increase the output voltage, so as to increase the charging current; otherwise, the power conversion module 10 is controlled to decrease the output voltage, so as to decrease the charging current. Therefore, the constant charging current can be maintained unchanged through continuous adjustment, the battery can be guaranteed to reach the allowed maximum charging current and not exceed the specification range through the stable constant current, and the quick and safe battery charging is realized.
(3) Constant voltage charging process
When the control module 50 obtains that the voltage of the battery 70 to be charged reaches the charging cutoff voltage 4.3V set by the user through the voltage detection module 30, the constant voltage charging mode is entered. Because of the existence of the internal resistance of the battery, the battery is not really fully charged at this time, and the real voltage of the battery can be calculated by the following formula: as can be seen from the formula, when Iset is sufficiently small, Vtrue is approximately equal to Vbat, and it can be considered that the battery is fully charged, so the charging device 100 can adopt a constant voltage charging mode. When the battery voltage reaches 4.3V, the control module 50 controls the power conversion module 10 to gradually decrease the output voltage to decrease the charging current. For a power conversion module 10 that includes PMOS transistors, the control module 50 may control the PWM duty cycles of the PMOS transistors to be increased step by step to decrease the charging current. While ensuring that the battery float voltage Vbat stabilizes at 4.3V, at which time the charging current is gradually reduced until it approaches a target value, e.g. 0. At this time, the real voltage of the battery can reach 4.3V, and the battery is fully charged. This approach does not result in either overcharging or under-charging of the battery.
In summary, the charging device provided in this embodiment includes: the device comprises a power supply conversion module, an input module, a voltage detection module, a current detection module and a control module; the control module is respectively connected with the power supply conversion module, the input module, the voltage detection module and the current detection module, and the power supply conversion module is connected with the voltage detection module; the input module is used for receiving the input of a user; the control module is used for determining charging parameters according to input of a user, and controlling the power supply conversion module to charge the battery to be charged according to the determined charging parameters, the battery voltage detected by the voltage detection module and the battery charging current detected by the current detection module. The input module receives the input of a user, and the charging parameters are determined according to the input of the user, so that the charging parameters can be adjusted according to requirements, and the adaptive performance of the charging device is improved. The charging device provided by the embodiment can charge batteries with various specifications, and when the charging device is used, a user only needs to set corresponding charging parameters according to the performance of the battery to be charged, so that the quick charging can be realized on the premise of ensuring the charging safety. Not only provides convenience for users, but also improves the resource utilization rate.
In order to provide a more friendly man-machine interaction manner to enhance the user experience, the charging device 100 provided in this embodiment may further include a display module 80. Referring to fig. 2, a display module 80 is added to the embodiment shown in fig. 1, and the display module 80 is connected to the control module 50. The display module 80 may provide a setting interface of the charging parameters to the user, so that the user can set the charging parameters and display the charging parameters set by the user. The display module 80 may also be used to display various parameters during the charging process, such as the percentage of the battery 70 to be charged during the charging process.
In an alternative embodiment, the input module 20 may include an operation key, the operation key is connected to the control module 50, the operation key may include, for example, an UP key that increases step by step according to a set step size for increasing the charging parameter, and a DOWN key that decreases step by step according to a set step size for decreasing the charging parameter, the input module 20, the display module 80, and the display module 80 further include, referring to fig. 3, on the basis of the embodiment shown in fig. 2, the display module 80 may include a L CD display screen, L CD display screen connected to the DATA interface and the C L K interface of the control module 50 for acquiring information to be displayed from the control module 50, the input module 20 may include four operation keys S1, S2, S3, and S4, a first pole of S1 is connected to the UP interface of the control module 50 for increasing the charging parameter, a first pole of S2 is connected to the DOWN interface of the control module 50 for decreasing the charging parameter, a first pole of the control module is connected to the control module 50, a pole of the charging interface for determining that the charging parameter is connected to the same as the charging interface, or when the charging module is connected to the charging module 50, the charging module has a different protection function, or when the charging interface is connected to the same as the charging interface, the charging interface is connected to the charging interface, the charging interface is connected to the charging.
In an alternative embodiment, the power conversion module may include: the circuit comprises a first capacitor, a transistor, a Schottky diode, an inductor and a second capacitor; a first pole of the first capacitor is grounded; the second pole of the first capacitor is connected with the first pole of the transistor and is used for being connected to an external power supply; the control electrode of the transistor is connected to the control module; the second pole of the transistor and the first pole of the inductor are connected to the cathode of the Schottky diode; the anode of the Schottky diode is grounded; the first pole of the second capacitor is grounded; the second pole of the inductor and the second pole of the second capacitor are connected to the voltage detection module and are also used for being connected to the anode of the battery to be charged. The PWM interface of the control module is connected to the gate of the transistor.
The transistor may be a bipolar transistor or a field effect transistor, and for example, a PMOS transistor, an NMOS transistor, a triode, a thyristor, or the like may be used. When the transistor is a bipolar transistor, the control electrode of the transistor refers to the base electrode of the bipolar transistor, the first electrode can be the collector electrode or the emitter electrode of the bipolar transistor, and the corresponding second electrode can be the emitter electrode or the collector electrode of the bipolar transistor; when the transistor is a field effect transistor, the control electrode refers to a gate electrode of the field effect transistor, the first electrode may be a drain electrode or a source electrode of the field effect transistor, and the corresponding second electrode may be a source electrode or a drain electrode of the field effect transistor.
The power conversion module will be described in detail below by taking PMOS transistors as an example.
Fig. 4 is a schematic structural diagram of a power conversion module in a charging device according to an embodiment, as shown in fig. 4, the power conversion module 10 provided in this embodiment may include a first capacitor C1, a PMOS transistor Q1, a schottky diode D1, an inductor L1, and a second capacitor C2.
The first pole of the first capacitor C1 is grounded, the second pole of the first capacitor C1 is connected with the drain of the PMOS transistor Q1 and is used for being connected to the external power supply 60, the gate of the PMOS transistor Q1 is connected to the control module 50, the source of the PMOS transistor Q1 and the first pole of the inductor L1 are connected with the cathode of the Schottky diode D1, the anode of the Schottky diode D1 is grounded, the first pole of the second capacitor C2 is grounded, and the second pole of the inductor L1 and the second pole of the second capacitor C2 are connected to the voltage detection module 30 and are also used for being connected to the anode of the battery 70 to be charged.
In an alternative real-time approach, the PWM interface of the control module 50 is connected to the gate of a PMOS transistor Q1.
The working principle of the power conversion module 10 provided by this embodiment is as follows:
the control module 50 controls the on/off of the PMOS transistor Q1 through PWM, when the PMOS transistor Q1 is turned on, the external power source 60 stores energy in the inductor L1 and charges the battery 70 at the same time, and when the PMOS transistor Q1 is turned off, the battery 70 is continuously charged through the energy stored in the inductor L1, the schottky diode D1 prevents the battery from being discharged into the charging device when the external power source 60 is turned off, and the energy of the battery may flow back to the external power source 60, which may cause a circuit abnormality or discharge of the battery 70.
Fig. 5 is a schematic structural diagram of a charging device according to yet another embodiment. As shown in fig. 5, in the charging device provided in this embodiment, the voltage detection module 30 may include: a first resistor R1 and a second resistor R2; a first pole of the first resistor R1 is connected to the power conversion module 10, and is also used for being connected to a positive pole of the battery 70 to be charged; the second pole of the first resistor R1 and the first pole of the second resistor R2 are connected to the control module 50; the second pole of the second resistor R2 is connected to ground. The current detection module 40 may include: a third resistor R3, a fourth resistor R4 and a third capacitor C3; a first pole of the third resistor R3 and a first pole of the fourth resistor R4 are connected for connection to the negative pole of the battery 70 to be charged; a second pole of the fourth resistor R4 is grounded; the second pole of the third resistor R3 and the first pole of the third capacitor C3 are connected to the control module 50; the second pole of the third capacitor C3 is connected to ground. The Vb interface of the control module is connected to the second pole of the first resistor R1 and the first pole of the second resistor R2; the Ichg interface of the control module is connected to the second pole of the third resistor R3 and the first pole of the third capacitor C3.
In this embodiment, the voltage Vb detected by the voltage detection module 30 is R2/(R1+ R2) × Vbat, so that the control module 50 can determine the voltage Vbat of the battery 70 to be charged through an internal analog-to-digital conversion function (AD converter).
In the present embodiment, the current detecting module 40 calculates the current value of the battery 70 to be charged by the voltage difference generated by the fourth resistor R4, Ichg is U/R4, and U is also detected by the analog-to-digital conversion function inside the control module 50.
The process of charging by adopting the charging device provided by the embodiment is as follows:
the charging device 100 enters a standby state after being connected with an external power supply 60, the control module controls L CD to display a charging parameter interface to be edited, and a user can adjust and edit a charging parameter through a key, after the battery 70 to be charged is placed in the charging device 100, the charging mode is confirmed to enter a charging mode, the control module 50 detects whether a charging cut-off voltage and a charging current preset by the user are reached through the voltage detection module 30 and the current detection module 40, the charging process is controlled according to a detected value, the output voltage of the power conversion module 10 is Vout (Vin) Vin (1-D)/D in the embodiment, wherein D represents a PWM duty ratio, Vin represents a voltage input to the power conversion module 10, namely the output voltage of the external power supply 60, therefore, the lower the PWM duty ratio D is, the higher the output voltage is, the battery charging current is also the larger, the higher the PWM duty ratio D is, the lower the output voltage is also the lower, the battery charging current is also the smaller, the control module 50 compares the real-time charging current and the voltage, the PWM duty ratio is reduced when the PWM duty ratio is lower than the user preset value, the PWM duty ratio is increased when the PWM duty ratio is higher than the user preset value.
It should be noted that the voltage detection module and the current detection module provided in this embodiment may be combined with any of the above embodiments.
It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.
Claims (10)
1. A charging device, comprising:
the device comprises a power supply conversion module, an input module, a voltage detection module, a current detection module and a control module;
the control module is respectively connected with the power supply conversion module, the input module, the voltage detection module and the current detection module, and the power supply conversion module is connected with the voltage detection module;
the input module is used for receiving input of a user;
the power supply conversion module is also used for connecting an external power supply and a battery to be charged so as to obtain electric energy from the external power supply, performing boosting or voltage reduction processing on input voltage according to a charging control signal output by the control module, outputting the signal after the boosting or voltage reduction processing to the battery to be charged and charging the battery to be charged;
the voltage detection module is also used for connecting a battery to be charged, detecting the voltage of the battery to be charged and feeding the detected voltage back to the control module;
the current detection module is also used for connecting a battery to be charged, detecting the charging current of the battery to be charged and feeding the detected charging current back to the control module;
the control module is used for determining charging parameters according to input of a user and outputting charging control signals to the power supply conversion module according to the determined charging parameters, the detected battery voltage and the detected battery charging current.
2. The apparatus of claim 1, wherein the input module comprises a liquid crystal touch screen.
3. The apparatus of claim 1, further comprising a display module coupled to the control module for displaying charging parameters.
4. The apparatus of claim 3, wherein the display module comprises an L CD display screen, the L CD display screen being connected to the DATA interface and the C L K interface of the control module.
5. The apparatus of claim 3, wherein the input module comprises operation keys, the operation keys comprising an UP key that is incremented step by step according to a set step size and a DOWN key that is decremented step by step according to a set step size, the operation keys being connected to the control module.
6. The apparatus of any of claims 1-5, wherein the power conversion module comprises:
the circuit comprises a first capacitor, a transistor, a Schottky diode, an inductor and a second capacitor;
a first pole of the first capacitor is grounded;
the second pole of the first capacitor is connected with the first pole of the transistor and is used for being connected to an external power supply;
the control electrode of the transistor is connected to the control module;
the second pole of the transistor and the first pole of the inductor are connected to the cathode of the Schottky diode;
the anode of the Schottky diode is grounded;
the first pole of the second capacitor is grounded;
and the second pole of the inductor and the second pole of the second capacitor are connected to the voltage detection module and are also used for being connected to the anode of a battery to be charged.
7. The apparatus of claim 6,
the PWM interface of the control module is connected to the gate of the transistor.
8. The apparatus of any one of claims 1-5, wherein the voltage detection module comprises:
a first resistor and a second resistor;
the first pole of the first resistor is connected to the power conversion module and is also used for being connected to the positive pole of a battery to be charged;
a second pole of the first resistor and a first pole of the second resistor are connected to the control module;
and the second pole of the second resistor is grounded.
9. The apparatus of claim 8, wherein the current detection module comprises:
a third resistor, a fourth resistor and a third capacitor;
the first pole of the third resistor and the first pole of the fourth resistor are connected and used for being connected to the negative pole of a battery to be charged;
a second pole of the fourth resistor is grounded;
a second pole of the third resistor and a first pole of the third capacitor are connected to the control module;
the second pole of the third capacitor is grounded.
10. The apparatus of claim 9,
a Vb interface of the control module is connected to a second pole of the first resistor and a first pole of the second resistor;
the Ichg interface of the control module is connected to the second pole of the third resistor and the first pole of the third capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922478336.XU CN211046538U (en) | 2019-12-31 | 2019-12-31 | Charging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922478336.XU CN211046538U (en) | 2019-12-31 | 2019-12-31 | Charging device |
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| CN211046538U true CN211046538U (en) | 2020-07-17 |
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| CN201922478336.XU Active CN211046538U (en) | 2019-12-31 | 2019-12-31 | Charging device |
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2019
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