Charger and vehicle adopting same

Abstract

The utility model discloses a charger and a vehicle using the charger, the charger comprises a voltage conversion circuit, a main control module, a sampling module, an analog-to-digital conversion module and an isolation module, the sampling module collects an output analog signal of the voltage conversion circuit; the analog-to-digital conversion module converts an output analog signal collected by the sampling module into a digital signal, and then the digital signal is isolated and transmitted to the main control module through the isolation module, so that the anti-interference capability of the signal can be improved, and the output analog signal does not need to be transmitted to the main control module through an isolation operational amplifier; an internal circuit of the charger can be simplified, the number of components is reduced, and then the cost and the size of the charger are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and in particular to a charger and a vehicle using the charger. Background Art

[0002] The on-board charger is composed of microelectronics technology and control technology, electronic components and structural heat dissipation devices. At present, as a device for charging power batteries, on-board chargers have been widely used in electric vehicles and electric motorcycles. The on-board charger is equipped with a power circuit to charge the power battery, and a transformer is usually used to divide the power circuit into the primary side and the secondary side. The on-board charger needs to convert the charging power supply into voltage. To charge the power battery, it is necessary to sample the voltage, current and other signals at its output end, and then the control chip processes them to control the on-board charger to be able to perform voltage conversion stably and controllably.

[0003] Traditional on-board chargers usually place the control chip on the primary side, and need to isolate and sample the output voltage, output current, etc. of the on-board charger. Currently, the high-voltage signal is converted into a low-voltage analog signal through a sampling circuit, and then the low-voltage analog signal is transmitted to the signal adjustment circuit through an isolation amplifier. The signal adjustment adjusts the low-voltage analog signal appropriately and provides it to the control chip. When multiple signals need to be collected, multiple sampling circuits, isolation amplifiers, and signal adjustment circuits need to be set up, which makes the circuit complex, increases the number of components, and increases the size of the on-board charger. In addition, the cost of the isolation amplifier is high, which also increases the cost of the on-board charger. Utility Model Content

[0004] In view of this, the present application provides a charger and a vehicle using the charger, which can simplify the circuit and reduce the number of components, thereby reducing the cost of the charger and reducing the size of the charger.

[0005] The technical solution of this application is as follows:

[0006] The present application provides a charger, including a voltage conversion circuit and a main control module, wherein the input end of the voltage conversion circuit is connected to a power supply, the output end of the voltage conversion circuit is connected to a power battery, and the main control module is used to control the voltage conversion circuit to convert the voltage of the power supply into a charging voltage to charge the power battery; the charger also includes: a sampling module connected to the output end of the voltage conversion circuit, the sampling module is used to collect an output analog signal of the voltage conversion circuit; an analog-to-digital conversion module connected to the sampling module, the analog-to-digital conversion module is used to receive the output analog signal and convert the output analog signal into a digital signal; and an isolation module connected between the analog-to-digital conversion module and the main control module, the isolation module is used to isolate and transmit the digital signal to the main control module.

[0007] In a possible implementation, the sampling module is used to collect the output voltage and output current of the voltage conversion circuit, and the output analog signal includes a first analog signal corresponding to the output voltage and a second analog signal corresponding to the output current.

[0008] In a possible implementation, the sampling module includes: a first sampling unit, the first sampling unit is connected between the output end of the voltage conversion circuit and the analog-to-digital conversion module, the first sampling unit is used to collect the output voltage and output a first analog signal to the analog-to-digital conversion module according to the output voltage; a second sampling unit, the second sampling unit is connected between the output end of the voltage conversion circuit and the analog-to-digital conversion module, the second sampling unit is used to collect the output current and output a second analog signal to the analog-to-digital conversion module according to the output current.

[0009] In a possible implementation, the analog-to-digital conversion module is used to receive a first analog signal and a second analog signal, and convert the first analog signal and the second analog signal into a first digital signal and a second digital signal, respectively; the isolation module is used to receive a first digital signal and a second digital signal, and isolate and transmit the first digital signal and the second digital signal to the main control module through two signal channels, respectively.

[0010] In a possible implementation, the charger is provided with an auxiliary power supply, which is used to power the main control module and / or the analog-to-digital conversion module. The sampling module is also used to collect the auxiliary power supply voltage, and the output analog signal also includes a third analog signal corresponding to the auxiliary power supply voltage.

[0011] In a possible embodiment, the sampling module includes a third sampling unit, which is connected between the output end of the auxiliary power supply and the analog-to-digital conversion module. The third sampling unit is used to collect the auxiliary power supply voltage and output a third analog signal to the analog-to-digital conversion module according to the auxiliary power supply voltage; the analog-to-digital conversion module is used to receive the third analog signal and convert the third analog signal into a third digital signal; the isolation module is used to isolate and transmit the third digital signal to the main control module.

[0012] The present application also provides a vehicle, comprising: a frame; a wheel assembly, comprising a front wheel and a rear wheel arranged under the frame; a power battery, arranged on the frame, the power battery is used to power the vehicle; a charger, arranged on the frame, the charger comprises a voltage conversion circuit and a main control module, the input end of the voltage conversion circuit is connected to the power supply, the output end of the voltage conversion circuit is connected to the power battery, the main control module is used to control the voltage conversion circuit to convert the voltage of the power supply into a charging voltage to charge the power battery; the charger also comprises: a sampling module, connected to the output end of the voltage conversion circuit, the sampling module is used to collect the output analog signal of the voltage conversion circuit; an analog-to-digital conversion module, connected to the sampling module, the analog-to-digital conversion module is used to receive the output analog signal and convert the output analog signal into a digital signal; an isolation module, connected between the analog-to-digital conversion module and the main control module, the isolation module is used to isolate and transmit the digital signal to the main control module.

[0013] In a possible implementation, the sampling module is used to collect the output voltage and output current of the voltage conversion circuit, and the output analog signal includes at least a first analog signal corresponding to the output voltage and a second analog signal corresponding to the output current; the sampling module includes: a first sampling unit, the first sampling unit is connected between the output end of the voltage conversion circuit and the analog-to-digital conversion module, the first sampling unit is used to collect the output voltage and output the first analog signal to the analog-to-digital conversion module according to the output voltage; a second sampling unit, the second sampling unit is connected between the output end of the voltage conversion circuit and the analog-to-digital conversion module, the second sampling unit is used to collect the output current and output the second analog signal to the analog-to-digital conversion module according to the output current.

[0014] In a possible implementation, the analog-to-digital conversion module is used to receive a first analog signal and a second analog signal, and convert the first analog signal and the second analog signal into a first digital signal and a second digital signal, respectively; the isolation module is used to receive a first digital signal and a second digital signal, and isolate and transmit the first digital signal and the second digital signal to the main control module through two signal channels.

[0015] In a possible implementation, the charger is provided with an auxiliary power supply, which is used to power the main control module and / or the analog-to-digital conversion module. The sampling module also includes a third sampling unit, which is connected between the output end of the auxiliary power supply and the analog-to-digital conversion module. The third sampling unit is used to collect the auxiliary power supply voltage of the voltage conversion circuit and output a third analog signal to the analog-to-digital conversion module according to the auxiliary power supply voltage; the analog-to-digital conversion module is used to receive the third analog signal and convert the third analog signal into a third digital signal; the isolation module is used to isolate and transmit the third digital signal to the main control module.

[0016] The charger in the present application includes a voltage conversion circuit, a main control module, a sampling module, an analog-to-digital conversion module and an isolation module. The sampling module collects the output analog signal of the voltage conversion circuit, and the analog-to-digital conversion module converts the output analog signal collected by the sampling module into a digital signal. The digital signal is then isolated and transmitted to the main control module through the isolation module, which can improve the anti-interference ability of the signal. There is no need to transmit the output analog signal to the main control module through an isolation operational amplifier, which can simplify the internal circuit of the charger, reduce the number of components, and thus reduce the cost of the charger and reduce the size of the charger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic diagram of the circuit structure of a voltage conversion circuit and a main control module of a charger in the prior art.

[0018] Figure 2 The present invention is a circuit structure diagram of a main control module, a voltage conversion circuit and a sampling circuit of a charger in the prior art.

[0019] Figure 3 It is a circuit structure diagram of the internal circuit of the charger provided in an embodiment of the present application.

[0020] Figure 4 It is a circuit structure diagram of the internal circuit of a charger provided in another embodiment of the present application.

[0021] Figure 5 It is a module connection diagram of the main control module, sampling module, analog-to-digital conversion module and isolation module provided in an embodiment of the present application.

[0022] Figure 6 It is a schematic diagram of the structure of a vehicle provided in an embodiment of the present application.

[0023] Main component symbols

[0024] Vehicle 10

[0025] Frame 100

[0026] Wheel assembly 200

[0027] Front wheel 210

[0028] Rear wheel 220

[0029] Charger 300

[0030] Voltage conversion circuit 310

[0031] Main control module 320

[0032] Sampling module 330

[0033] The first sampling unit 331

[0034] The second sampling unit 332

[0035] The third sampling unit 333

[0036] Analog-to-digital conversion module 340

[0037] Isolation module 350

[0038] Auxiliary power 360 DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0043] See also Figure 1 , Figure 1 FIG. 2 shows an internal circuit structure diagram of a charger 300 in the prior art. Figure 1 As shown, the charger 300 includes a voltage conversion circuit 310 and a main control module 320. The input end of the voltage conversion circuit 310 is connected to a power supply (not shown), and the output end of the voltage conversion circuit 310 is connected to a power battery (not shown). The main control module 320 is used to control the voltage conversion circuit 310 to convert the voltage of the power supply into a charging voltage to charge the power battery.

[0044] The charger 300 can be used to charge the power battery of an electric motorcycle, electric car or all-terrain vehicle. The charger 300 can be installed on the electric motorcycle, electric car or all-terrain vehicle, or can be independently installed, and when the power battery of the electric motorcycle, electric car or all-terrain vehicle needs to be charged, it is electrically connected to the power battery. The power supply can be an AC power grid.

[0045] It can be understood that the main control module 320 can be a microcontroller processing chip, such as a single-chip microcomputer, a control chip, and the like.

[0046] Please refer again Figure 1 The voltage conversion circuit 310 includes a transformer, which divides the voltage conversion circuit 310 into a primary side and a secondary side. In order to control the voltage conversion circuit 310 to be able to perform voltage conversion stably and controllably, it is necessary to sample the voltage, current and other signals at the output end (i.e., the secondary side) of the voltage conversion circuit 310. The main control module 320 determines whether the output voltage and output current of the voltage conversion circuit 310 meet the requirements based on the collected voltage, current and other signals.

[0047] In some embodiments, the main control module 320 can also control the voltage conversion circuit 310 to perform voltage conversion according to the sampled voltage, current and other signals. Specifically, the main control module 320 can input the sampled voltage, current and other signals into the voltage loop and the current loop, and generate a driving signal to each switch tube on the primary side through the voltage loop and the current loop control, and control the on and off of each switch tube through the driving signal to control the voltage conversion circuit 310 to perform voltage conversion. Therefore, in order to facilitate the main control module 320 to output the driving signal to each switch tube, the main control module 320 can be set on the primary side of the voltage conversion circuit 310.

[0048] See also Figure 2 , Figure 2 A sampling circuit diagram for sampling the voltage signal at the output end of the voltage conversion circuit 310 known to the applicant is shown. The voltage signal is first divided by the voltage sampling circuit to convert the high-voltage signal into a low-voltage analog signal. The low-voltage analog signal is then transmitted to the signal adjustment circuit through the isolation operational amplifier circuit. The low-voltage analog signal is adjusted to a suitable analog signal through the signal adjustment circuit and input into the main control module 320. The main control module 320 obtains the actual output voltage of the voltage conversion circuit 310 according to the analog signal.

[0049] When the main control module 320 needs to collect multiple signals to control the voltage conversion circuit 310, it is necessary to set multiple Figure 2The sampling circuit shown in the figure, that is, it is necessary to set up multiple voltage sampling circuits / current sampling circuits, isolation op amp circuits and signal adjustment circuits, which makes the internal circuit of the charger 300 complex, increases the number of components, and increases the size of the charger 300. In addition, the isolation op amp required in the isolation op amp circuit is relatively expensive, and setting up multiple isolation op amp circuits will increase the overall cost of the charger 300.

[0050] To this end, an embodiment of the present application provides a charger 300 that can simplify the circuit and reduce the number of components, thereby reducing the cost of the charger 300 and reducing the size of the charger 300.

[0051] like Figure 3 and Figure 4 As shown, the charger 300 of the embodiment of the present application may include a voltage conversion circuit 310 , a main control module 320 , a sampling module 330 , an analog-to-digital conversion module 340 and an isolation module 350 .

[0052] The voltage conversion circuit 310 and the main control module 320 of the embodiment of the present application are as described above and will not be further described here.

[0053] The sampling module 330 is connected to the output end of the voltage conversion circuit 310 , and is used to collect at least one output analog signal of the voltage conversion circuit 310 .

[0054] The analog-to-digital conversion module 340 is connected to the sampling module 330 , and is used to receive the output analog signal and convert the output analog signal into a digital signal.

[0055] It can be understood that when the sampling module 330 collects multiple output analog signals, the analog-to-digital conversion module 340 may include multiple receiving ends and output ends, so that the same analog-to-digital conversion module 340 can simultaneously receive multiple output analog signals and convert the multiple output analog signals into multiple digital signals respectively, and the multiple digital signals can be output through multiple output ends.

[0056] The isolation module 350 is connected between the analog-to-digital conversion module 340 and the main control module 320 , and is used to isolate and transmit the digital signal to the main control module 320 .

[0057] Thus, the main control module 320 can confirm the corresponding output analog signal according to the digital signal, and then determine whether the output of the voltage conversion circuit 310 meets the demand according to the output analog signal. Or the main control module 320 can output a driving signal to control the operation of the voltage conversion circuit 310 according to the digital signal, so that the voltage conversion circuit 310 can stably and controllably perform voltage conversion.

[0058] The isolation module 350 may include a plurality of isolation transmission channels, and the plurality of isolation transmission channels are respectively connected to the plurality of output terminals of the analog-to-digital conversion module 340, so as to transmit the plurality of digital signals to the main control module 320 through the plurality of isolation transmission channels. Of course, when the sampling module 330 only collects one output analog signal, the digital signal can be transmitted to the main control module 320 through only one isolation transmission channel.

[0059] In the charger 300 of the embodiment of the present application, the output analog signal collected by the sampling module 330 is converted into a digital signal through the analog-to-digital conversion module 340, and then the digital signal is isolated and transmitted to the main control module 320 through the isolation module 350, which can improve the anti-interference ability of the signal. There is no need to transmit the output analog signal to the main control module 320 through an isolation amplifier, which can simplify the internal circuit of the charger 300 and reduce the number of components, thereby reducing the cost of the charger 300 and reducing the size of the charger 300.

[0060] In some embodiments, the sampling module 330 can be used to collect the output voltage and output current of the voltage conversion circuit 310, and the output analog signal can include a first analog signal corresponding to the output voltage and a second analog signal corresponding to the output current. The analog-to-digital conversion module 340 can convert the first analog signal and the second analog signal into a first digital signal and a second digital signal, respectively, and then the main control module 320 can determine the output voltage and output current of the voltage conversion circuit 310 according to the first digital signal and the second digital signal, thereby, the main control module 320 can determine whether the output voltage and the output current meet the requirements.

[0061] In some embodiments, the main control module 320 can also perform voltage loop and current loop control on the voltage conversion circuit 310 according to the output voltage and output current of the voltage conversion circuit 310. Therefore, the sampling module 330 can collect the first analog signal corresponding to the output voltage and the second analog signal corresponding to the output current of the voltage conversion circuit 310, and the first analog signal and the second analog signal are converted into the first digital signal and the second digital signal by the analog-to-digital conversion module 340, and then isolated and transmitted to the main control module 320 by the isolation module 350. The main control module 320 can obtain the actual output voltage value and the output current value according to the first digital signal and the second digital signal, so that the voltage conversion circuit 310 can be controlled by the voltage loop and the current loop according to the actual output voltage value and the output current value.

[0062] like Figure 5As shown, specifically, the sampling module 330 may include a first sampling unit 331 and a second sampling unit 332. The first sampling unit 331 is connected between the output end of the voltage conversion circuit 310 and the analog-to-digital conversion module 340, and the first sampling unit 331 is used to collect the output voltage and output a first analog signal to the analog-to-digital conversion module 340 according to the output voltage. The second sampling unit 332 is connected between the output end of the voltage conversion circuit 310 and the analog-to-digital conversion module 340, and the second sampling unit 332 is used to collect the output current and output a second analog signal to the analog-to-digital conversion module 340 according to the output current.

[0063] The analog-to-digital conversion module 340 can be used to receive the first analog signal and the second analog signal, and convert the first analog signal and the second analog signal into the first digital signal and the second digital signal, respectively. The isolation module 350 can be used to receive the first digital signal and the second digital signal, and transmit the first digital signal and the second digital signal to the main control module 320 through two signal channels in isolation.

[0064] More specifically, the first sampling unit 331 may include a first resistor (not shown) and a second resistor (not shown), one end of the first resistor is connected to the output end of the voltage conversion circuit 310, the other end of the first resistor is connected to one end of the second resistor and the analog-to-digital conversion module 340, and the other end of the second resistor is grounded. The output voltage of the voltage conversion circuit 310 is divided by the first resistor and the second resistor to form a first analog signal, and the first analog signal is transmitted to the analog-to-digital conversion module 340. The second sampling unit 332 may include a current transformer (not shown), which is connected in series to the output end of the voltage conversion circuit 310, converts the output current of the voltage conversion circuit 310 into a voltage signal to form a second analog signal, and sends the second analog signal to the analog-to-digital conversion module 340.

[0065] Of course, the sampling module 330 of the embodiment of the present application is not limited thereto, as long as it can collect the output voltage and output current of the voltage conversion circuit 310 and transmit the analog signals related to the output voltage and output current to the analog-to-digital conversion module 340.

[0066] In some embodiments, the analog-to-digital conversion module 340 may be an A / D converter (Analog To Digital Converter, ADC), and the A / D converter may include multiple input terminals for receiving analog signals and output terminals for outputting digital signals. The isolation module 350 may include a digital isolator, and the digital isolator includes multiple signal channels for transmitting digital signals. Therefore, when it is necessary to sample multiple signals of the voltage conversion circuit 310, there is no need to increase the number of A / D converters and digital isolators, which can reduce the number of components and reduce costs. In addition, the A / D converter is a single-chip microcomputer with an AD sampling function, which has a simple connection method and low cost, and can further reduce costs.

[0067] For example, the A / D converter may include a first input terminal, a second input terminal, a first output terminal, and a second output terminal, and the digital isolator includes a first signal channel and a second signal channel. The first input terminal of the A / D converter is connected to the first sampling unit 331 to receive the first analog signal, and the A / D converter converts the first analog signal into a first digital signal and outputs it from the first output terminal. The second input terminal of the A / D converter is connected to the second sampling unit 332 to receive the second analog signal, and the A / D converter converts the second analog signal into a second digital signal and outputs it from the second output terminal. The first signal channel of the digital isolator is connected between the first output terminal of the A / D converter and the main control module 320, and the second signal channel of the digital isolator is connected between the second output terminal of the A / D converter and the main control module 320. The first digital signal is transmitted to the main control module 320 through the first signal channel of the digital isolator in isolation, and the second digital signal is transmitted to the main control module 320 through the second signal channel of the digital isolator in isolation.

[0068] Of course, in the embodiment of the present application, the analog-to-digital conversion module 340 is not limited to an A / D converter, but may also be a chip, MCU, etc. having an AD sampling port and an analog-to-digital conversion function.

[0069] It can be understood that the main control module 320 can be a control chip, such as an MCU, and the main control module 320 can also include multiple signal receiving terminals to respectively receive the first digital signal and the second digital signal.

[0070] Among them, the first digital signal and the second digital signal can be PWM digital signals, that is, the A / D converter can convert the received analog signal into a PWM digital signal. Specifically, the A / D converter can perform digital-to-analog conversion according to the magnitude values ​​of the received first analog signal and the second analog signal, and determine the duty cycle of the converted first digital signal and the second digital signal according to the magnitude values ​​of the first analog signal and the second analog signal. For example, when the first analog signal is 0V, the duty cycle of the first digital signal converted by the A / D converter is 0%. When the first analog signal is 3.3V, the duty cycle of the first digital signal converted by the A / D converter is 100%. There is a similar relationship between the magnitude value of the second analog signal and the duty cycle of the second digital signal, which will not be described in detail.

[0071] Based on this, after the main control module 320 receives the first digital signal and the second digital signal, it can obtain the specific values ​​of the first analog signal and the second analog signal according to the duty cycle of the first digital signal and the second digital signal, and then determine the actual values ​​of the output voltage and output current of the voltage conversion circuit 310 according to the specific values ​​of the first analog signal and the second analog signal.

[0072] It can be understood that the voltage conversion circuit 310 is mainly used to convert the voltage of the power supply into a charging voltage to power the power battery. The voltages at its input and output are relatively large, and the main control module 320 is generally a control chip, which requires a low-voltage power supply to power the main control module 320. Figure 4 As shown, the charger 300 may also be provided with an auxiliary power supply 360 , and the auxiliary power supply 360 supplies power to the main control module 320 .

[0073] In some embodiments, the output voltage of the auxiliary power supply 360 is 12V, and the power supply voltage of the main control module 320 is 3.3V. The output voltage of the auxiliary power supply 360 can be stepped down by a step-down chip (not shown) to obtain a 3.3V voltage to power the main control module 320. Of course, the output voltage of the auxiliary power supply 360 is not limited thereto, and can be set according to the actual power supply voltage of the main control module 320.

[0074] Similarly, the analog-to-digital conversion module 340 can be an A / D converter, a chip with analog-to-digital conversion function, MCU, etc. The analog-to-digital conversion module 340 also needs to be powered by a low-voltage power supply, so the auxiliary power supply 360 can also power the analog-to-digital conversion module 340.

[0075] Based on this, the main control module 320 also needs to determine whether the auxiliary power supply voltage (the output voltage of the auxiliary power supply 360) can meet the power supply requirements. Therefore, the sampling module 330 can also be used to collect the auxiliary power supply voltage, and the output analog signal also includes a third analog signal corresponding to the auxiliary power supply voltage.

[0076] Furthermore, if Figure 5 As shown, the sampling module 330 includes a third sampling unit 333, which is connected between the output end of the auxiliary power supply 360 and the analog-to-digital conversion module 340. The third sampling unit 333 is used to collect the auxiliary power supply voltage and output a third analog signal to the analog-to-digital conversion module 340 according to the auxiliary power supply voltage.

[0077] The analog-to-digital conversion module 340 can be used to receive the third analog signal and convert the third analog signal into a third digital signal, and the isolation module 350 is used to isolate and transmit the third digital signal to the main control module 320. The main control module 320 can determine the size of the auxiliary power supply voltage according to the third digital signal, thereby determining whether the auxiliary power supply voltage meets the requirements.

[0078] It is understandable that the third sampling unit 333 can also be similar to the first sampling unit 331, and two voltage-dividing resistors can be connected in series to the output end of the auxiliary power supply 360, and the auxiliary power supply voltage is divided by the two voltage-dividing resistors to obtain a third analog signal. The third digital signal can also be a PWM digital signal, and the analog-to-digital conversion module 340 can also determine the duty cycle of the third digital signal according to the size of the third analog signal, and then convert the third analog signal into a third digital signal.

[0079] In the embodiment of the present application, when the analog-to-digital conversion module 340 is an A / D converter, the A / D converter may further include a third input terminal and a third output terminal, the third input terminal is connected to the third sampling unit 333 to receive a third analog signal, and the third output terminal outputs a third digital signal. When the isolation module 350 is a digital isolator, the digital isolator may include a third signal channel, and the third signal channel may be connected between the third output terminal of the A / D converter and the main control module 320 to isolate and transmit the third digital signal to the main control module 320.

[0080] In some specific examples, the sampling module 330 may include a first sampling unit 331, a second sampling unit 332 and a third sampling unit 333 at the same time, so as to simultaneously sample the output voltage, the output current of the voltage conversion circuit 310 and the auxiliary power supply voltage of the charger 300, and transmit the first analog signal corresponding to the output voltage, the second analog signal corresponding to the output current and the third analog signal corresponding to the auxiliary power supply voltage to the analog-to-digital conversion module 340, so that the analog-to-digital conversion module 340 converts the first analog signal, the second analog signal and the third analog signal into a first digital signal, a second digital signal and a third digital signal respectively, and the main control module 320 can simultaneously receive the first digital signal, the second digital signal and the third digital signal through the isolation module 350.

[0081] Of course, the sampling module 330 of the embodiment of the present application is not limited to the first sampling unit 331, the second sampling unit 332 and the third sampling unit 333, and a fourth sampling unit, a fifth sampling unit, etc. can also be set. The number of sampling units can be set according to the number of parameters that the main control module 320 needs to sample.

[0082] like Figure 6 As shown, the embodiment of the present application also provides a vehicle 10, including a frame 100, a wheel assembly 200, a power battery (not shown) and a charger 300 ( Figure 6 (not shown). The wheel assembly 200 includes a front wheel 210 and a rear wheel 220 disposed below the frame 100, and is used to drive the vehicle 10 to move. The power battery is disposed on the frame 100, and is used to power the vehicle 10. The charger 300 is also disposed on the frame 100, and the charger 300 includes a voltage conversion circuit 310 and a main control module 320. The input end of the voltage conversion circuit 310 is connected to the power supply, and the output end of the voltage conversion circuit 310 is connected to the power battery. The main control module 320 is used to control the voltage conversion circuit 310 to convert the voltage of the power supply into a charging voltage to charge the power battery.

[0083] The charger 300 further includes a sampling module 330, an analog-to-digital conversion module 340, and an isolation module 350. The sampling module 330 is connected to the output end of the voltage conversion circuit 310, and the sampling module 330 is used to collect at least one output analog signal of the voltage conversion circuit 310. The analog-to-digital conversion module 340 is connected to the sampling module 330, and the analog-to-digital conversion module 340 is used to receive the output analog signal and convert the output analog signal into a digital signal. The isolation module 350 is connected between the analog-to-digital conversion module 340 and the main control module 320, and the isolation module 350 is used to isolate and transmit the digital signal to the main control module 320.

[0084] In the vehicle 10 of the embodiment of the present application, the output analog signal collected by the sampling module 330 is converted into a digital signal through the analog-to-digital conversion module 340 of the charger 300, and the digital signal is isolated and transmitted to the main control module 320 through the isolation module 350, which can improve the anti-interference ability of the signal. There is no need to transmit the output analog signal to the main control module 320 through an isolation amplifier, which can simplify the internal circuit of the charger 300 and reduce the number of components, thereby reducing the cost of the charger 300 and reducing the size of the charger 300, thereby reducing the cost of the vehicle 10.

[0085] In the embodiment of the present application, the vehicle 10 may refer to an electric car, an electric motorcycle, an all-terrain vehicle, etc.

[0086] The detailed description of the charger 300 used in the vehicle 10 of the embodiment of the present application can be found in the aforementioned charger 300, which will not be further described here.

[0087] The above embodiments are described in the form of preferred embodiments of the present application, and are not intended to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements made to the technical solutions of the present application by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present application.

Claims

1. A charger, comprising a voltage conversion circuit and a main control module, wherein the input end of the voltage conversion circuit is connected to a power supply, the output end of the voltage conversion circuit is connected to a power battery, and the main control module is used to control the voltage conversion circuit to convert the voltage of the power supply into a charging voltage to charge the power battery; It is characterized in that The charger also includes: A sampling module, connected to the output end of the voltage conversion circuit, and used for collecting the output analog signal of the voltage conversion circuit; an analog-to-digital conversion module, connected to the sampling module, the analog-to-digital conversion module being used to receive the output analog signal and convert the output analog signal into a digital signal; and The isolation module is connected between the analog-to-digital conversion module and the main control module, and is used to isolate and transmit the digital signal to the main control module.

2. The charger according to claim 1, characterized in that: The sampling module is used to collect the output voltage and output current of the voltage conversion circuit, and the output analog signal includes a first analog signal corresponding to the output voltage and a second analog signal corresponding to the output current.

3. The charger according to claim 2, characterized in that: The sampling module comprises: A first sampling unit, the first sampling unit is connected between the output end of the voltage conversion circuit and the analog-to-digital conversion module, and the first sampling unit is used to collect the output voltage and output the first analog signal to the analog-to-digital conversion module according to the output voltage; The second sampling unit is connected between the output end of the voltage conversion circuit and the analog-to-digital conversion module, and is used to collect the output current and output the second analog signal according to the output current and send it to the analog-to-digital conversion module.

4. The charger according to claim 3, characterized in that: The analog-to-digital conversion module is used to receive the first analog signal and the second analog signal, and convert the first analog signal and the second analog signal into a first digital signal and a second digital signal respectively; The isolation module is used to receive the first digital signal and the second digital signal, and to isolate and transmit the first digital signal and the second digital signal to the main control module through two signal channels respectively.

5. The charger according to any one of claims 2 to 4, characterized in that: The charger is provided with an auxiliary power supply, which is used to power the main control module and / or the analog-to-digital conversion module. The sampling module is also used to collect the auxiliary power supply voltage, and the output analog signal also includes a third analog signal corresponding to the auxiliary power supply voltage.

6. The charger according to claim 5, characterized in that: The sampling module includes a third sampling unit, which is connected between the output end of the auxiliary power supply and the analog-to-digital conversion module, and is used to collect the auxiliary power supply voltage and output the third analog signal to the analog-to-digital conversion module according to the auxiliary power supply voltage; The analog-to-digital conversion module is used to receive the third analog signal and convert the third analog signal into a third digital signal; The isolation module is used to isolate and transmit the third digital signal to the main control module.

7. A vehicle comprising: Frame; A wheel assembly, comprising a front wheel and a rear wheel disposed below the frame; A power battery, arranged on the vehicle frame, and used to supply power to the vehicle; A charger, arranged on the vehicle frame, comprising a voltage conversion circuit and a main control module, wherein an input end of the voltage conversion circuit is connected to a power supply, an output end of the voltage conversion circuit is connected to the power battery, and the main control module is used to control the voltage conversion circuit to convert the voltage of the power supply into a charging voltage to charge the power battery; Characterized in that the charger also includes: A sampling module, connected to the output end of the voltage conversion circuit, and used for collecting the output analog signal of the voltage conversion circuit; An analog-to-digital conversion module, connected to the sampling module, and configured to receive the output analog signal and convert the output analog signal into a digital signal; The isolation module is connected between the analog-to-digital conversion module and the main control module, and is used to isolate and transmit the digital signal to the main control module.

8. The vehicle according to claim 7, characterized in that The sampling module is used to collect the output voltage and output current of the voltage conversion circuit, and the output analog signal at least includes a first analog signal corresponding to the output voltage and a second analog signal corresponding to the output current; The sampling module comprises: A first sampling unit, the first sampling unit is connected between the output end of the voltage conversion circuit and the analog-to-digital conversion module, and the first sampling unit is used to collect the output voltage and output the first analog signal to the analog-to-digital conversion module according to the output voltage; The second sampling unit is connected between the output end of the voltage conversion circuit and the analog-to-digital conversion module, and is used to collect the output current and output the second analog signal according to the output current and send it to the analog-to-digital conversion module.

9. The vehicle according to claim 8, characterized in that The analog-to-digital conversion module is used to receive the first analog signal and the second analog signal, and convert the first analog signal and the second analog signal into a first digital signal and a second digital signal respectively; The isolation module is used to receive the first digital signal and the second digital signal, and transmit the first digital signal and the second digital signal to the main control module through two signal channels in isolation.

10. The vehicle according to claim 8 or 9, characterized in that The charger is provided with an auxiliary power supply, and the auxiliary power supply is used to power the main control module and / or the analog-to-digital conversion module. The sampling module also includes a third sampling unit, and the third sampling unit is connected between the output end of the auxiliary power supply and the analog-to-digital conversion module. The third sampling unit is used to collect the auxiliary power supply voltage and output a third analog signal to the analog-to-digital conversion module according to the auxiliary power supply voltage; The analog-to-digital conversion module is used to receive the third analog signal and convert the third analog signal into a third digital signal; The isolation module is used to isolate and transmit the third digital signal to the main control module.

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