A charger control circuit and fast charger

Abstract

The utility model relates to charging control technical field discloses a kind of charger control circuit and fast charger, control circuit includes power supply unit, main control unit, first charger control unit, first charger communication unit, second charger control unit, second charger communication unit and battery communication unit;When actually using, the main control unit in the control circuit of the utility model can control the charging control of the first charger and the second charger in periphery by first charger control unit and second charger control unit, so as to improve charging current, and then improve lithium battery charging speed.

Description

Technical Field

[0001] This utility model relates to the field of charging control technology, specifically to a charger control circuit and a fast charger. Background Technology

[0002] With the rapid development of charging technology, the demand for faster charging speeds of lithium batteries is increasing in order to allow users to use them with less waiting time. Traditional chargers use a single charger, which limits the charging speed due to the relatively small charging current. For lithium batteries in traditional two-wheeled electric vehicles, it takes several hours to fully charge, which is inconvenient for practical use. Utility Model Content

[0003] In view of the shortcomings of the prior art, the present invention provides a charger control circuit and a fast charger. The technical problem to be solved is that the charging current of existing chargers is small and the charging speed is slow.

[0004] To solve the above technical problems, in the first aspect, this utility model provides the following technical solution: a charger control circuit, including a power supply unit, a main control unit, a first charger control unit, a first charger communication unit, a second charger control unit, a second charger communication unit, and a battery communication unit;

[0005] The power supply unit is used to provide operating voltage to the control circuit;

[0006] The main control unit is electrically connected to the first charger control unit and the second charger control unit respectively. The first charger control unit is electrically connected to the first charger communication unit and interacts with the external first charger through the first charger communication unit. The second charger control unit is electrically connected to the second charger communication unit and interacts with the external second charger through the second charger communication unit.

[0007] The main control unit is electrically connected to the battery communication unit and interacts with the lithium battery through the battery communication unit.

[0008] In one embodiment of the first aspect, the present invention further includes a charging current detection unit and a temperature detection unit, wherein the main control unit is electrically connected to the charging current detection unit and the temperature detection unit respectively, and the charging current is detected by the charging current detection unit and the charging temperature is detected by the temperature detection unit.

[0009] In one embodiment of the first aspect, the present invention further includes an Internet of Things (IoT) communication unit, wherein the main control unit is electrically connected to the IoT communication unit and interacts with the back-end terminal through the IoT communication unit.

[0010] In one embodiment of the first aspect, the power supply unit is used to provide the control circuit with a 12V DC operating voltage, a 5V DC operating voltage, and a 3.3V DC operating voltage.

[0011] In one embodiment of the first aspect, the present invention further includes a voice alarm unit and a buzzer alarm unit, wherein the main control unit is electrically connected to the voice alarm unit and the buzzer alarm unit respectively, and emits a warning voice through the voice alarm unit and emits a warning sound through the buzzer alarm unit.

[0012] In one embodiment of the first aspect, the present invention further includes at least one button unit, which is electrically connected to the main control unit and is used to input a high-level or low-level operation signal to the main control unit.

[0013] In one embodiment of the first aspect, the present invention further includes at least one fan drive unit, wherein the main control unit is electrically connected to the fan drive unit and drives the peripheral fan to rotate through the fan drive unit.

[0014] In one embodiment of the first aspect, the present invention further includes a 485 communication unit and a display screen, wherein the main control unit is electrically connected to the display screen through the 485 communication unit, and the display screen is used for information display.

[0015] In one embodiment of the first aspect, the present invention further includes a lithium battery detection unit, wherein the main control unit is electrically connected to the lithium battery detection unit, and the lithium battery detection unit detects whether the lithium battery is connected.

[0016] Secondly, this utility model also provides a fast charger, including the charger control circuit described above, and further including a first charger and a second charger. The positive output terminal of the first charger and the positive output terminal of the second charger are electrically connected and electrically connected to the battery detection unit. The negative output terminal of the first charger and the negative output terminal of the second charger are electrically connected. The control circuit is electrically connected to the first charger and the second charger.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: In actual use, the main control unit in the control circuit of this utility model can control the first and second chargers in the periphery to perform charging control through the first charger control unit and the second charger control unit, thereby increasing the charging current and thus increasing the charging speed of the lithium battery. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention in the embodiments;

[0019] Figure 2This is a circuit diagram of the power supply unit in the embodiment;

[0020] Figure 3 This is a circuit diagram of the main control unit in the embodiment;

[0021] Figure 4 This is a circuit diagram of the first charger control unit in the embodiment;

[0022] Figure 5 This is a circuit diagram of the first charger communication unit in the embodiment;

[0023] Figure 6 This is a circuit diagram of the battery communication unit in the embodiment;

[0024] Figure 7 This is a circuit diagram of the IoT communication unit in the embodiment;

[0025] Figure 8 This is a circuit diagram of the voice alarm unit in the embodiment;

[0026] Figure 9 This is a circuit diagram of the buzzer alarm unit in the embodiment;

[0027] Figure 10 This is a circuit diagram of the charging current detection unit in the embodiment;

[0028] Figure 11 This is a circuit diagram of the temperature detection unit in the embodiment;

[0029] Figure 12 This is a circuit diagram of the button unit in the embodiment;

[0030] Figure 13 This is a circuit diagram of the fan drive unit in the embodiment;

[0031] Figure 14 This is a circuit diagram of the lithium battery detection unit in the embodiment;

[0032] Figure 15 This is a circuit diagram of the 485 communication unit in the embodiment;

[0033] Figure 16 This is a schematic diagram of the fast charger in Example 2. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0035] Example 1

[0036] like Figure 1As shown, the charger control circuit provided in this embodiment includes a power supply unit 1, a main control unit 2, a first charger control unit 3, a first charger communication unit 4, a second charger control unit 5, a second charger communication unit 6, and a battery communication unit 7.

[0037] Power supply unit 1 is used to provide operating voltage for the control circuit;

[0038] The main control unit 2 is electrically connected to the first charger control unit 3 and the second charger control unit 5 respectively. The first charger control unit 3 is electrically connected to the first charger communication unit 4 and interacts with the external first charger through the first charger communication unit 4. The second charger control unit 5 is electrically connected to the second charger communication unit 6 and interacts with the external second charger through the second charger communication unit 6.

[0039] The main control unit 2 is electrically connected to the battery communication unit 7, and interacts with the lithium battery through the battery communication unit.

[0040] In actual use, the main control unit 2 can control the output of the external first charger through the first charger control unit 3 and the first charger communication unit 4. The main control unit 2 can control the output of the external second charger through the second charger control unit 5 and the second charger communication unit 6. The main control unit 2 communicates with the lithium battery through the battery communication unit 7 to obtain information about the lithium battery, including voltage and current information, so as to control the output of the first charger and the second charger and ensure normal charging.

[0041] In practical use, the main control unit 2 in the control circuit of this utility model can control the first and second chargers in the periphery to perform charging control through the first charger control unit 3 and the second charger control unit 4, thereby increasing the charging current and thus increasing the charging speed of the lithium battery.

[0042] In this embodiment, power supply unit 1 is used to provide 12V DC operating voltage, 5V DC operating voltage, and 3.3V DC operating voltage to the control circuit. For example, one circuit of power supply unit 1 is as follows: Figure 2 The external input voltages 12V_1 and 12_V are converted into a stable 12V DC voltage through diodes D1 and D2, capacitors C14 and C15, respectively. The voltage regulator chip U6 of model 7805 converts the 12V DC voltage into a 5V DC voltage, and the voltage regulator chip IC1 of model HT7333 converts the 5V DC voltage into a 3.3V DC voltage.

[0043] In this embodiment, the circuit of the main control unit 2 is as follows: Figure 3 As shown, it includes a control chip of model GD32F303RCT6; the circuit of the first charger control unit 3 is as follows. Figure 4As shown, it includes a control chip of model GD32F303CCT6; the circuit of the first charger communication unit 4 is as follows. Figure 5 As shown, it includes a communication chip of model ISO1050DE; in addition, the circuit of the second charger control unit 5 is the same as that of the first charger control unit 3; the circuit of the second charger communication unit 6 is the same as that of the first charger communication unit 4.

[0044] In this embodiment, the circuit of the battery communication unit 7 is as follows: Figure 6 As shown, it is a CAN communication circuit, and the circuit is connected to... Figure 5 The circuit shown is the same, including a communication chip of model ISO1050DE.

[0045] In this embodiment, as Figure 1 As shown, this utility model also includes an Internet of Things (IoT) communication unit 8. The main control unit 2 is electrically connected to the IoT communication unit 8, and interacts with the backend terminal through the IoT communication unit 8; the circuit of the IoT communication unit 8 is as follows: Figure 7 As shown. In actual use, the charger information can be sent to the back-end terminal in real time through the network communication unit 8, allowing managers and users to query information and perform online upgrades.

[0046] In this embodiment, as Figure 1 As shown, this utility model also includes a voice alarm unit 16 and a buzzer alarm unit 17. The main control unit 2 is electrically connected to the voice alarm unit 16 and the buzzer alarm unit 17 respectively. The voice alarm unit 16 emits a warning voice, and the buzzer alarm unit 17 emits a warning sound.

[0047] More specifically, in this embodiment, the circuit of the voice alarm unit 16 is as follows: Figure 8 As shown, the main control unit 2 uses... Figure 8 The circuit in the middle drives the speaker SPK1 to play a voice alarm prompt; the circuit of the buzzer alarm unit 17 is as follows: Figure 9 As shown, the main control unit 2 controls the buzzer BUZZ alarm prompt by controlling the on and off state of the transistor Q3.

[0048] In this embodiment, as Figure 1 As shown, this utility model also includes a charging current detection unit 9 and a temperature detection unit 10. The main control unit 2 is electrically connected to the charging current detection unit 9 and the temperature detection unit 10 respectively. The charging current detection unit 9 detects the magnitude of the charging current, and the temperature detection unit 10 detects the magnitude of the charging temperature. In addition, the main control unit 2 can also obtain the magnitude of the lithium battery charging current through the battery communication unit 7, and the current detection through the charging current detection unit 9 allows for dual monitoring.

[0049] More specifically, in this embodiment, the circuit of the charging current detection unit 9 is as follows: Figure 10 As shown, it uses a Hall sensor (HALL) for current detection; the circuit of the temperature detection unit 10 is as follows. Figure 11 As shown, the resistor branch consisting of resistor R28 and thermistor NTC1 detects temperature. When the temperature changes, the resistance of thermistor NTC1 changes, and the analog voltage input to main control unit 2, i.e., the voltage across capacitor C30, changes accordingly. Main control unit 2 performs analog-to-digital conversion on the analog voltage to determine its magnitude, and thus the temperature. In practical use, main control unit 2 can perform over-temperature protection and over-current protection based on the detected charging current and temperature, ensuring charging safety.

[0050] In one implementation, multiple temperature detection units 10 can be set up to perform temperature detection according to actual needs, and there is no limitation here.

[0051] In this embodiment, as Figure 1 As shown, this utility model also includes at least one button unit 11, which is electrically connected to the main control unit 2 and is used to input high-level or low-level operation signals to the main control unit 2. For example, the circuit of the button unit 11 is as follows... Figure 12 As shown, when button KEY1 is pressed, the signal input to the main control unit 2 is low; when button KEY1 is not pressed, the signal input to the main control unit 2 is high. In some embodiments, the number of button units 11 can be set according to actual needs; for example, three button units 11 can be set.

[0052] In this embodiment, as Figure 1 As shown, this utility model also includes at least one fan drive unit 12. The main control unit 2 is electrically connected to the fan drive unit 12, and drives the peripheral fan to rotate through the fan drive unit 12 to dissipate heat during charging and prevent excessive charging temperature. For example, the circuit of the fan drive unit 12 is as follows... Figure 13 As shown, when the temperature is abnormal, the main control unit 2 drives the transistor Q2 to conduct, and the fan FAN1 rotates to dissipate heat.

[0053] In this embodiment, as Figure 1 As shown, this utility model also includes a lithium battery detection unit 13. The main control unit 2 is electrically connected to the lithium battery detection unit 13, and the lithium battery detection unit 13 detects whether the lithium battery is connected.

[0054] More specifically, in this embodiment, the circuit of the lithium battery detection unit 13 is as follows: Figure 14 As shown, when the lithium battery is connected, the primary side of the optocoupler U11 is turned on, and the secondary side of the optocoupler is also turned on accordingly. The signal input to the main control unit 2 changes from a high level to a low level, thereby performing dual monitoring with the battery communication unit 7.

[0055] In this embodiment, as Figure 1 As shown, this utility model also includes a 485 communication unit 14 and a display screen 15. The main control unit 2 is electrically connected to the display screen 15 through the 485 communication unit 14. The display screen is used for information display, thus facilitating user viewing. Furthermore, the circuit of the 485 communication unit 14 is as follows... Figure 15 As shown.

[0056] Example 2

[0057] like Figure 16 As shown, this embodiment provides a fast charger, including a charger control circuit as described in Embodiment 1, and also includes a first charger and a second charger. The positive output terminal of the first charger and the positive output terminal of the second charger are electrically connected and electrically connected to a battery detection unit. The negative output terminal of the first charger and the negative output terminal of the second charger are electrically connected. The control circuit is electrically connected to the first charger and the second charger.

[0058] In actual use, the fast charger has a standby state and a charging stop. In the standby state, the main control unit 2 controls the first charger and the second charger to have no output voltage and current.

[0059] When the lithium battery is connected, the main control unit 2 successfully hands over with the lithium battery via the CAN communication protocol through the battery communication unit 7. It then controls the charger's output voltage and current according to the lithium battery's requirements, and the buzzer alarm unit 17 and voice alarm unit 16 provide voice prompts. If there is no communication or the communication protocol is not met, the system remains in standby mode, the display screen 15 shows a battery connection error, and the buzzer alarm unit 17 and voice alarm unit 16 provide alarm prompts.

[0060] During normal charging, if the current detected by the Hall sensor deviates significantly from the current communicated with the lithium battery, charging will stop, the display screen 15 will show a charging abnormality, and the buzzer alarm unit 17 and the voice alarm unit 16 will issue an alarm notification.

[0061] Based on the above description and inspired by this utility model, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A charger control circuit, characterized in that, It includes a power supply unit, a main control unit, a first charger control unit, a first charger communication unit, a second charger control unit, a second charger communication unit, and a battery communication unit; The power supply unit is used to provide operating voltage to the control circuit; The main control unit is electrically connected to the first charger control unit and the second charger control unit respectively. The first charger control unit is electrically connected to the first charger communication unit and interacts with the external first charger through the first charger communication unit. The second charger control unit is electrically connected to the second charger communication unit and interacts with the external second charger through the second charger communication unit. The main control unit is electrically connected to the battery communication unit and interacts with the lithium battery through the battery communication unit.

2. The charger control circuit according to claim 1, characterized in that, It also includes a charging current detection unit and a temperature detection unit. The main control unit is electrically connected to the charging current detection unit and the temperature detection unit respectively. The charging current detection unit detects the magnitude of the charging current, and the temperature detection unit detects the magnitude of the charging temperature.

3. The charger control circuit according to claim 1, characterized in that, The power supply unit is used to provide the control circuit with a 12V DC operating voltage, a 5V DC operating voltage, and a 3.3V DC operating voltage.

4. A charger control circuit according to claim 1, characterized in that, It also includes an Internet of Things (IoT) communication unit, which is electrically connected to the main control unit and interacts with the back-end terminal through the IoT communication unit.

5. A charger control circuit according to claim 1, characterized in that, It also includes a voice alarm unit and a buzzer alarm unit. The main control unit is electrically connected to the voice alarm unit and the buzzer alarm unit respectively. The voice alarm unit emits a warning voice, and the buzzer alarm unit emits a warning sound.

6. A charger control circuit according to claim 1, characterized in that, It also includes at least one button unit, which is electrically connected to the main control unit and is used to input a high-level or low-level operation signal to the main control unit.

7. A charger control circuit according to claim 1, characterized in that, It also includes at least one fan drive unit, and the main control unit is electrically connected to the fan drive unit, which drives the peripheral fan to rotate.

8. A charger control circuit according to claim 1, characterized in that, It also includes a 485 communication unit and a display screen. The main control unit is electrically connected to the display screen through the 485 communication unit, and the display screen is used for information display.

9. A charger control circuit according to any one of claims 1-8, characterized in that, It also includes a lithium battery detection unit, and the main control unit is electrically connected to the lithium battery detection unit to detect whether the lithium battery is connected.

10. A fast charging charger, characterized in that, The charger control circuit according to claim 9 further includes a first charger and a second charger, wherein the positive output terminal of the first charger and the positive output terminal of the second charger are electrically connected and electrically connected to the battery detection unit, the negative output terminal of the first charger and the negative output terminal of the second charger are electrically connected, and the control circuit is electrically connected to the first charger and the second charger.

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