Power supply system of laser tool supporting PD rapid charging

Abstract

The utility model provides a power supply system of a laser tool supporting PD rapid charging. The power supply system comprises a USB Type-C interface, a PD protocol chip, a charging and discharging management circuit and an internal power supply. According to the utility model, a circular DC interface is replaced by the USB Type-C interface, so that a charger with the existing USB Type-C interface or other power supplies can be used for charging; the phenomenon that the lithium battery is damaged due to mismatching of charging voltage and charging current when a compliant USB cable and a charging power supply are used for charging is avoided; meanwhile, when a USB line supporting a PD protocol and a charging power supply are used for charging, the charging power can be dynamically increased, so that the charging time is shortened; and other equipment based on the USB interface can be charged.

Description

Technical Field

[0001] The utility model relates to the field of laser tools, in particular to a power supply system for a laser tool. Background Art

[0002] For the existing power supply system of a laser tool, its power supply method usually can only use a self - contained battery pack and charger. The supporting lithium - ion battery pack usually uses 1 to 6 strings, and the charging interface is basically a round DC interface. The charging interfaces, charging voltages, and currents of lithium - ion battery packs of different brands are different, and chargers of different brands or types on the market cannot be compatible. If a user purchases laser tools of different brands, on the one hand, they need to purchase a matching charger, which increases the corresponding purchase cost and resource waste; on the other hand, due to the inconsistent charging voltage and charging current parameters of the chargers, it is very difficult for users to manage and maintain, and there are often phenomena that the product is damaged during charging due to plugging in the wrong charger, causing certain losses to both users and manufacturers. Summary of the Utility Model

[0003] To overcome the above - mentioned technical defects, the utility model provides a power supply system for a laser tool that supports PD fast charging, including a housing, a USB Type - C interface, a PD protocol chip, a charge - discharge management circuit, and an internal power supply;

[0004] The USB Type - C interface, the PD protocol chip, the charge - discharge management circuit, the internal power supply, and the protection circuit are arranged inside the housing;

[0005] The USB Type - C interface is arranged at the corresponding opening position of the housing and can access USB - based devices for charging and discharging; the USB Type - C interface is connected to the PD protocol chip;

[0006] The PD protocol chip performs role detection and negotiates and confirms charge - discharge parameters with USB - based devices through the USB Type - C interface;

[0007] The PD protocol chip is connected to the charge - discharge management circuit and sends the confirmed charge - discharge parameters to the charge - discharge management circuit;

[0008] The charge - discharge management circuit is connected to the internal power supply, controls the internal power supply to charge and discharge according to the charge - discharge parameters, monitors the voltage and current during the charge and discharge of the power supply, and protects the internal power supply;

[0009] The internal power supply supplies power to the laser tool host.

[0010] Preferably, the power supply system for a laser tool that supports PD fast charging further includes a USB Type - A interface;

[0011] The USB Type-A interface is provided at the corresponding opening position of the housing and can access devices based on the USB interface for discharging; the USB Type-A interface is connected to the charging management circuit and the charge and discharge management circuit;

[0012] When the device based on the USB interface supports the PD protocol, the PD protocol chip performs role detection with the device based on the USB interface through the USB Type-A interface, and the PD protocol management chip sends the negotiated and confirmed discharge parameters to the charge and discharge management chip;

[0013] When the device based on the USB interface does not support the PD protocol, the USB Type-A interface connects to the charge and discharge management chip for discharging.

[0014] Preferably, the power supply system of the laser tool supporting PD fast charging further includes a protection circuit;

[0015] The protection circuit is connected to the charge and discharge management circuit and the internal power supply, and is configured by the charging management chip to provide additional circuit protection for the internal power supply.

[0016] Preferably, the power supply system of the laser tool supporting PD fast charging further includes a main control MCU chip and a display;

[0017] The main control MCU chip is connected to the PD protocol chip, reads the data of the charging circuit and the internal power supply through the PD protocol chip, and converts it into the UI display signal of the display;

[0018] The display is provided at the corresponding opening position of the housing, and the display displays the charge and discharge information according to the UI display signal.

[0019] Preferably, the power supply system of the laser tool supporting PD fast charging is an independent power supply system and is connected to the laser tool host by a plug-in method.

[0020] Preferably, the power supply system of the laser tool supporting PD fast charging can be charged independently or charged as a whole when connected to the laser tool host.

[0021] Preferably, the power supply system of the laser tool supporting PD fast charging can be plugged in and unplugged from the laser tool host, so as to quickly replace the power supply system of the laser tool.

[0022] Preferably, the power supply system of the laser tool supporting PD fast charging is externally provided with discharge contacts.

[0023] Preferably, the power supply system of the laser tool supporting PD fast charging is integrated with the laser tool main body, and the internal power supply is connected to the laser tool main body through internal lines.

[0024] The power supply system of the laser tool supporting PD fast charging provided by the present utility model, which replaces the circular DC interface with a USB Type-C interface, can use any existing charger or other power supply based on the USB Type-C interface to charge the laser tool; the power supply system of the laser tool supporting PD fast charging follows the PD protocol or BC protocol, and will not cause damage to the lithium battery due to mismatching of charging voltage and current when charging with a compliant USB cable and charging power supply; at the same time, when charging with a USB line and charging power supply supporting the PD protocol, the charging power can be dynamically increased according to the performance of the battery pack, greatly shortening the charging time; and it can also charge other devices based on the USB interface.

[0025] The objectives, features, and advantages of the present utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Description of the Drawings

[0026] Figure 1 It is a basic circuit block diagram of the power supply system of a laser tool supporting PD fast charging according to the present utility model.

[0027] Figure 2 It is a perspective view of the power supply system of a laser tool supporting PD fast charging according to the present utility model when removed from the laser tool main body.

[0028] Figure 3 It is a perspective view of another angle of the power supply system of a laser tool supporting PD fast charging according to the present utility model when removed from the laser tool main body.

[0029] Figure 4 It is a perspective view of the power supply system of a laser tool supporting PD fast charging according to the present utility model when connected to the laser tool main body.

[0030] Reference Numerals: 1 - USB Type-C interface, 2 - USB Type-A interface, 3 - PD protocol chip, 4 - main control MCU chip, 5 - charging management chip, 6 - lithium battery, 7 - protection circuit, 8 - projector main body, 9 - discharge contact, 11 - CC1 / CC2 pins, 12 - D+ / D- pins, 21 - D+ / D- pins, 22 - VBUS pin, 23 - GND pin, 61 - VBAT+ / VBAT- pins, 62 - thermistor. Detailed Embodiments

[0031] The advantages of the present utility model will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0032] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0033] The terms used in the present disclosure are for the purpose of describing specific embodiments only and are not intended to limit the present disclosure. The singular forms "a", "the", and "said" used in the present disclosure and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0035] In the description of the present utility model, unless otherwise specified and defined, it should be noted that the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a mechanical connection or an electrical connection, or it may be the communication inside two elements. It may be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] In the subsequent description, the suffixes such as "module", "component", or "unit" used to represent elements are only for the convenience of describing the present utility model, and they do not have a specific meaning in themselves. Therefore, "module" and "component" can be used interchangeably.

[0037] As Figure 1 shown, in one embodiment, a power supply system of a laser tool supporting PD fast charging according to the present utility model includes a housing, a USB Type-C interface 1, a USB Type-A interface 2, a PD protocol chip 3, a charging management chip 5, a lithium battery 6, and a protection circuit 7;

[0038] The above components are arranged inside a housing. There are two openings on the top of the housing, and their sizes and shapes are adapted to the USB Type-C interface 1 and the USB Type-A interface 2, which can clamp or fix the USB Type-C interface 1 and the USB Type-A interface 2 through other fixing parts, so that the male connectors of USB Type-A and USB Type-C can access the USB Type-C interface 1 and the USB Type-A interface 2 of the corresponding other USB devices through the openings for connection.

[0039] As Figure 1 shown, in this embodiment, the other USB device is a PD fast charger.

[0040] The USB Type-C interface 1 is a female connector that complies with the USB Type-C interface standard and supports the PD protocol, and is used to connect to the USB Type-C interface of other USB devices to establish a communication path and a charge and discharge path for charging input and discharge output. The USB Type-C interface 1 has CC1 / CC2 pins 11 and D+ / D- pins 12, and is connected to the PD protocol chip 3 through the CC1 / CC2 pins 11 and the D+ / D- pins 12.

[0041] Optionally, in this embodiment, the power supply system of the laser tool that supports PD fast charging further includes a USB Type-A interface 2. The USB Type-A interface 2 is a female connector that complies with the USB Type-A interface standard and is used to connect to the USB Type-A interface of other USB devices to establish a communication path and a discharge path for discharge output. The USB Type-A interface 2 has D+ / D- pins 21, a VBUS pin 22, and a GND pin 23, and is connected to the PD protocol chip 3 through the D+ / D- pins 21, and is connected to the charge management chip 5 through the VBUS pin 22 and the GND pin 23.

[0042] The PD protocol chip 3 is used to establish PD communication with other connected USB devices, establish a connection with other USB devices through the USB Type-C interface 1 and / or the USB Type-A interface 2, negotiate and confirm the master-slave role and the charge and discharge power with other USB devices, and confirm the power during PD charge and discharge. The PD protocol chip 3 is connected to the charge management chip 5 through an I2C serial port, and sends information such as the negotiated charge and discharge voltage, current, and power to the charge management chip 5.

[0043] When other USB devices are connected through the USB Type-C interface 1, the PD protocol chip detects the pull-up and pull-down voltages of both parties with the PD protocol chip of other USB devices through the CC1 / CC2 pins 11, and confirms whether the power supply system and other USB devices are in the role of power supply or power receiving party; after confirming the role, if other USB devices support the PD protocol, the PD protocol chip 3 connects the D+ / D- pins of other USB device interfaces through the D+ / D- pins 12, and according to the voltage, current of the power supply system and the status information of other USB devices, dynamically adjusts or customizes the charging and discharging voltage, current, and power according to the PD protocol regulations through the software function of the PD protocol. For example, a device that supports the PD3.0 protocol can configure the input and output with charging specifications of 5V / 3A, 9V / 3A, 12V / 3A, 15V / 3A, 20V / 5A, and the maximum power can be 100W; in addition to the charging specifications covered by the PD3.0 protocol, a device that supports the PD3.1 protocol can also configure the input and output with charging specifications of 28V / 5A, 36V / 5A, 48V / 5A, and the maximum power can be 240W. If other USB devices do not support the PD protocol, the PD protocol chip 3 confirms the transmitted voltage, current, and power according to the BC protocol regulations, and generally configures the input and output with a charging specification of 5V / 2A. The PD protocol chip 3 sends the confirmed charging and discharging voltage, current, and power parameters to the charging management chip 5.

[0044] When other USB devices are connected through the USB Type-A interface 2, if other USB devices support the PD protocol, the role detection is performed by the PD protocol chip of other USB devices. The PD protocol chip 3 is connected to the D+ / D- pins of other USB devices through the D+ / D- pins 21 of the USB Type-A interface 2, communicates with other USB devices, and confirms the transmitted voltage and current according to the BC protocol regulations. The PD protocol chip 3 sends the confirmed voltage, current, power and other parameters to the charging management chip 5. If other USB devices do not support the PD protocol, the USB Type-A interface 2 connects other USB devices to the charging management chip 5 through the VBUS pin 22 and the GND pin 23, and the charging and discharging voltage, current, and power are confirmed according to the BC protocol, and the input and output are configured with a charging specification of 5V / 2A.

[0045] The charging management chip 5 is connected to the lithium battery 6, and is used to control and manage the charging and discharging voltage and current of the lithium battery 6; and reads data information such as the voltage, current, temperature, and power of the lithium battery 6, and sends the data of the lithium battery 6 to the PD protocol chip 3. In addition, the charging management chip 5 provides secondary circuit protection for the lithium battery 6.

[0046] The lithium battery 6 is connected to the protection circuit 7 and is used to supply power to the laser tool. Inside it, there are VBAT+ / VBAT- pins 61 and a thermistor (NTC) 62. The thermistor 62 collects the temperature data of the lithium battery 6 during the charging and discharging of the lithium battery 6 and transmits the data to the charging management chip 5 and the protection circuit 7. The VBAT+ / VBAT- pins 61 are used to connect the peripheral circuit of this power supply system to supply power to the laser tool host.

[0047] The protection circuit 7 is connected to the charging management chip and is configured by the charging management chip. Together with the charging management chip, it forms a primary circuit protection for the lithium battery 6. When abnormal phenomena such as overvoltage, overcurrent, and overheating occur during the charging process, the charging management chip 5 protects the lithium battery 6 by controlling the protection circuit.

[0048] In this embodiment, this power supply system further includes a main control MCU chip 4 and a display. The display is set at the corresponding opening position of the housing. The size and shape of the opening are adapted to the display and can hold or fix the display through other fixing parts. The main control MCU chip 4 is connected to the PD protocol chip 3 through the UART serial port to establish communication. The main control MCU chip 4 reads data such as the voltage and current of the charging circuit and the temperature and power of the lithium battery 6 during charging through the PD protocol chip 3, and converts them into UI display signals for displaying information on the UI of the display. The display is connected to the main control MCU chip 4, receives the UI display signals, and displays the corresponding charging and discharging information.

[0049] As Figure 2 、 Figure 3 shown, in this embodiment, the power supply system is an independent power supply system and is connected to the laser tool host by plugging and other means. Discharge contacts 9 are arranged in parallel at the interface between this power supply system and the laser tool host. The discharge contacts 9 are connected to the VBAT+ / VBAT- pins of the lithium battery 6. When this power supply system is connected to the laser tool host, the discharge contacts 9 of this power supply system are connected to the corresponding charging contacts of the laser tool host to supply power to the laser tool. This power supply system allows independent charging of this power supply system when not connected to the laser tool host, or charging of the laser tool host and this power supply system as a whole when connected to the laser tool.

[0050] When necessary, the battery can be quickly replaced by unplugging and plugging this power supply system.

[0051] In this embodiment, a universal charger can also be used to charge this power supply system through the charging contacts of this power supply system.

[0052] In another embodiment, this power supply system can be set to be integrated with the laser tool host, and the lithium battery 6 is connected to the laser tool host through internal lines.

[0053] It should be noted that the embodiments of the present utility model have better implementability and do not impose any form of limitation on the present utility model. Any person skilled in the art may use the disclosed technical content to modify or transform it into an equivalent effective embodiment. However, as long as it does not depart from the technical solution of the present utility model, any modification, equivalent change or modification made to the above embodiments based on the technical essence of the present utility model still falls within the scope of the technical solution of the present utility model.

Claims

1. A power supply system for a laser tool supporting PD fast charging, characterized in that: It includes a housing, a USB Type-C interface, a PD protocol chip, a charge and discharge management circuit, and an internal power supply; The USB Type-C interface, the PD protocol chip, the charge and discharge management circuit, the internal power supply, and the protection circuit are arranged inside the housing; The USB Type-C interface is arranged at the corresponding opening position of the housing and can access USB interface-based devices for charging and discharging; the USB Type-C interface is connected to the PD protocol chip; The PD protocol chip performs role detection with the USB interface-based device through the USB Type-C interface and negotiates and confirms the charge and discharge parameters; The PD protocol chip is connected to the charge and discharge management circuit and sends the confirmed charge and discharge parameters to the charge and discharge management circuit; The charge and discharge management circuit is connected to the internal power supply, controls the internal power supply to charge and discharge according to the charge and discharge parameters, monitors the voltage and current during the charge and discharge of the power supply, and protects the internal power supply; The internal power supply powers the laser tool host.

2. The power supply system of the laser tool supporting PD fast charging according to claim 1, characterized in that: It includes a USB Type-A interface; The USB Type-A interface is arranged at the corresponding opening position of the housing and can access USB interface-based devices for discharging; the USB Type-A interface is connected to the charging management circuit and the charge and discharge management circuit; When the USB interface-based device supports the PD protocol, the PD protocol chip performs role detection with the USB interface-based device through the USB Type-A interface, and the PD protocol management chip sends the negotiated and confirmed discharge parameters to the charge and discharge management chip; When the USB interface-based device does not support the PD protocol, the USB Type-A interface connects to the charge and discharge management chip for discharging.

3. The power supply system of the laser tool supporting PD fast charging according to any one of claims 1 or 2, characterized in that: It includes a protection circuit; The protection circuit is connected to the charge and discharge management circuit and the internal power supply, and is configured by the charging management chip to provide additional circuit protection for the internal power supply.

4. The power supply system of the laser tool supporting PD fast charging according to claim 1, characterized in that: It includes a main control MCU chip and a display; The main control MCU chip is connected to the PD protocol chip, reads the data of the charging circuit and the internal power supply through the PD protocol chip, and converts it into the UI display signal of the display; The display is arranged at the corresponding opening position of the housing, and the display displays the charge and discharge information according to the UI display signal.

5. The power supply system of the laser tool supporting PD fast charging according to claim 1, characterized in that, The power supply system of the laser tool supporting PD fast charging is an independent power supply system and is connected to the laser tool host in a plug-in manner.

6. The power supply system of the laser tool supporting PD fast charging according to claim 1, characterized in that, It can be charged independently or charged as a whole when connected to the laser tool host.

7. The power supply system of the laser tool supporting PD fast charging according to claim 1, characterized in that, It can be plugged in and unplugged from the laser tool host, so as to quickly replace the power supply system of the laser tool.

8. The power supply system of the laser tool supporting PD fast charging according to claim 1, characterized in that, There are discharge contacts arranged externally.

9. The power supply system of the laser tool supporting PD fast charging according to claim 1, characterized in that, It is integrated with the laser tool host, and the internal power supply is connected to the laser tool host through internal lines.

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