A charging device and charging cabinet for electric power tools

Abstract

The application discloses a charging device and a charging cabinet of an electric tool. The electric tool is provided with a battery pack, and the charging device is used for charging the battery pack. The charging device comprises a charging output socket, a power module, a voltage detection module, a charging adjustment module, a polarity adaptation module and a central processing module. The polarity adaptation module comprises a first polarity unit and a second polarity unit. The first polarity unit is connected between the charging adjustment module and a second jack of the charging output socket, and the second polarity unit is connected between the charging adjustment module and a first jack of the charging output socket. The embodiment can distinguish the polarity of the battery of the electric tool, match the actual demand of the battery pack to be charged, charge the battery pack when the electric quantity of the battery pack to be charged is not enough, avoid the waste of electric energy caused by not taking the battery pack in time after the charging is completed, and avoid the situation that the electric quantity is not enough caused by the self-discharge of the battery.

Description

Technical Field

[0001] This invention relates to the field of battery charging technology, and more particularly to a charging device and charging cabinet for electric tools. Background Technology

[0002] With the continuous development and innovation of science and technology, factories, schools, power plants, power supply stations, and other enterprises all use power tools. When charging power tool batteries, polarity needs to be distinguished. The polarity markings on some batteries are not obvious, causing inconvenience during charging. If power tools are not used promptly after charging, it will waste electrical energy, and if left unused for a long time, the battery will discharge itself, resulting in insufficient charge. Summary of the Invention

[0003] This invention provides a charging device and charging cabinet for electric tools to solve the problems of inconvenient polarity identification of batteries in electric tools, waste of electrical energy caused by not using the electric tools in time after charging is completed, and insufficient charge caused by the battery itself discharging when not used for a long time.

[0004] According to one aspect of the present invention, a charging device for an electric tool is provided, the electric tool being equipped with a battery pack, the charging device being used to charge the battery pack; the charging device comprising:

[0005] A charging output socket for inserting a battery pack to be charged; the charging output socket includes a first socket and a second socket.

[0006] The power module is used to provide charging power to the battery pack being charged;

[0007] A voltage detection module, which is electrically connected to the charging output socket, detects the voltage of the battery pack being charged.

[0008] A charging adjustment module is electrically connected to the power module. The charging adjustment module adjusts the output voltage of the power module to meet the charging requirements of the battery pack being charged.

[0009] A polarity adapter module is connected between the second socket of the charging output socket and the charging adjustment module. The polarity adapter module is used to adapt to the positive and negative terminals of the battery pack being charged inserted into the second socket.

[0010] The central processing module is electrically connected to the power supply module, the voltage detection module, the charging adjustment module, and the polarity adapter module. The central processing module is used to collect the voltage and polarity of the battery pack being charged, and to control the working status of the power supply module, the charging adjustment module, and the polarity adapter module.

[0011] The polarity adapter module includes a first polarity unit and a second polarity unit, which are connected in parallel. The first polarity unit is connected between the charging adjustment module and the second socket of the charging output socket, and the second polarity unit is connected between the charging adjustment module and the first socket of the charging output socket.

[0012] Optionally, the polarity adapter module further includes: a first resistor and a second resistor; a first end of the first resistor is electrically connected to a first socket of the charging output socket, a second end of the first resistor is electrically connected to the central processing module, a first end of the second resistor is electrically connected to a second end of the first resistor, and a second end of the second resistor is grounded.

[0013] Optionally, the output voltage of the charging adjustment module includes the positive voltage of the charger and the negative voltage of the charger; the first polarity unit includes: a first indicator light, a first relay, a first transistor, a first diode and a third resistor;

[0014] The anode of the first indicator lamp is electrically connected to the central processing module; the first end of the third resistor is electrically connected to the cathode of the first indicator lamp, and the second end of the third resistor is electrically connected to the base of the first transistor; the emitter of the first transistor is grounded, and the collector of the first transistor is electrically connected to the first terminal of the coil of the first relay; the anode of the first diode is electrically connected to the first terminal of the coil of the first relay, and the cathode of the first diode is electrically connected to the second terminal of the coil of the first relay; the common terminal of the first relay is electrically connected to the second socket of the charging output socket, the normally open terminal of the first relay is connected to the positive voltage of the charging adjustment module, and the normally closed terminal of the first relay is connected to the negative voltage of the charging adjustment module; the second polarity unit includes: a second indicator lamp, a second relay, a second transistor, a second diode, and a fourth resistor;

[0015] The anode of the second indicator lamp is electrically connected to the central processing module; the first end of the fourth resistor is electrically connected to the cathode of the second indicator lamp, and the second end of the fourth resistor is electrically connected to the base of the second transistor; the emitter of the second transistor is grounded, and the collector of the second transistor is electrically connected to the first terminal of the coil of the second relay; the anode of the second diode is electrically connected to the first terminal of the coil of the second relay, and the cathode of the second diode is electrically connected to the second terminal of the coil of the second relay; the common terminal of the second relay is electrically connected to the first socket of the charging output socket, the normally open terminal of the second relay is connected to the positive voltage of the charging adjustment module, and the normally closed terminal of the second relay is connected to the negative voltage of the charging adjustment module;

[0016] Optionally, the charging adjustment module includes at least one of a charging timeout protection unit, a charging current reversal protection unit, and a trickle charge recharge protection unit.

[0017] Optionally, the output voltage of the charging adjustment module includes a positive voltage and a negative voltage; the charging current reverse increase protection unit includes a third diode and a fourth diode; the cathode of the third diode is electrically connected to the common terminal of the first relay, and the anode of the third diode is electrically connected to the normally open terminal of the first relay; the cathode of the fourth diode is electrically connected to the common terminal of the second relay, and the anode of the fourth diode is electrically connected to the normally open terminal of the second relay.

[0018] Optionally, the voltage detection module includes: a coulomb counter; the first voltage input terminal of the coulomb counter is electrically connected to the first socket of the charging output socket, the second voltage input terminal of the coulomb counter is electrically connected to the second socket of the charging output socket, and both the first voltage output terminal and the second voltage output terminal of the coulomb counter are connected to the central processing module.

[0019] According to another aspect of the present invention, a charging cabinet for electric tools is provided, comprising: a cabinet body, a control motherboard, and a charging device for electric tools as described in any one of claims 1-6; wherein at least one of the power supply module, the voltage detection module, the charging adjustment module, the polarity adaptation module, and the central processing module is disposed on the control motherboard, and the control motherboard is disposed within the cabinet body.

[0020] Optionally, the charging cabinet for the power tools further includes: an external power cord and a battery; the battery provides power to the control motherboard and the charging output socket; and the external power cord charges the battery.

[0021] Optionally, the charging cabinet for power tools further includes: a cabinet door and a fingerprint lock; the fingerprint lock is located on the outside of the cabinet door and is connected to the control motherboard to control the opening and closing status of the cabinet door.

[0022] Optionally, the charging cabinet for the power tools further includes a temperature sensor and a cooling fan; both the temperature sensor and the cooling fan are connected to the control motherboard; the control motherboard controls the on / off state of the cooling fan based on the detected temperature.

[0023] The technical solution of this invention uses a polarity matching module to sample the voltage of the battery pack being charged. A central processing module uses the sampled first voltage data to determine the polarity of the battery pack connected to the charging output socket, ensuring the correct polarity is used during charging and solving the problem of inconvenient polarity identification for power tool batteries. A voltage detection module calculates the required charging voltage for the battery pack using the sampled second voltage data. A charging adjustment module controls the output voltage based on the required charging voltage, matching the actual needs of the battery pack. For example, after charging is complete, the charging adjustment module starts a timer, stopping power supply after a preset time. Furthermore, the charging adjustment module uses the voltage detection module to monitor the battery pack's charge level. When the charge level decreases, the charging adjustment module reconnects the power module to the polarity matching module to recharge the battery pack, preventing energy waste due to unused charging batteries and the battery's self-discharge due to prolonged inactivity.

[0024] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the hardware structure of a charging device for an electric tool provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the hardware structure of a charging device for another electric tool provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the hardware structure of a charging device for an electric tool provided in another embodiment of the present invention;

[0029] Figure 4 This is a circuit schematic diagram of the first polarity unit provided in an embodiment of the present invention;

[0030] Figure 5 This is a circuit schematic diagram of the second polarity unit provided in an embodiment of the present invention;

[0031] Figure 6 This is a circuit diagram of the charging current reverse increase protection unit provided in an embodiment of the present invention;

[0032] Figure 7 This is a circuit diagram of a charging device for an electric tool provided in an embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the appearance of a charging cabinet for electric tools provided in an embodiment of the present invention. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0036] Figure 1 This is a schematic diagram of the hardware structure of a charging device for an electric tool provided in an embodiment of the present invention. Figure 2This is a schematic diagram of the hardware structure of a charging device for an electric tool provided in an embodiment of the present invention. This embodiment is applicable to situations where the polarity of the battery is unclear during charging of the electric tool's battery, or when the battery of the electric tool cannot be removed in time after charging is completed. The charging device for the electric tool can be configured in the charging cabinet of the electric tool.

[0037] The power tools are equipped with battery packs, and a charging device is used to charge the battery packs; see reference. Figure 1 The charging device includes:

[0038] A charging output socket 110 is used to insert a battery pack to be charged; the charging output socket 110 includes a first socket 111 and a second socket 112.

[0039] Power module 120 is used to provide charging power to the battery pack being charged;

[0040] Voltage detection module 130 is electrically connected to charging output socket 110 to detect the voltage of the battery pack being charged.

[0041] The charging adjustment module 140 is electrically connected to the power module 120. The charging adjustment module adjusts the output voltage of the power module 120 to meet the charging requirements of the battery pack being charged.

[0042] A polarity adapter module 150 is connected between the second socket 112 of the charging output socket 110 and the charging adjustment module 140. The polarity adapter module 150 is used to adapt to the positive and negative terminals of the battery pack being charged inserted into the first socket 111.

[0043] The central processing module 160, power supply module 120, voltage detection module 130, charging adjustment module 140 and polarity adapter module 150 are all electrically connected to the central processing module 160; the central processing module 160 is used to collect the voltage and polarity of the battery pack being charged, and to control the working status of the power supply module 120, charging adjustment module 140 and polarity adapter module 150.

[0044] The polarity adapter module 150 includes a first polarity unit and a second polarity unit, which are connected in parallel. The first polarity unit is connected between the charging adjustment module 140 and the second socket 112 of the charging output socket 110, and the second polarity unit is connected between the charging adjustment module 140 and the first socket 111 of the charging output socket.

[0045] Specifically, the charging output socket 110 is used to connect to the battery pack being charged. When the battery pack is connected to the charging output socket 110, the polarity adapter module 150 collects the voltage data of the battery pack. It should be noted that the voltage data collected by the polarity adapter module 150 is the first voltage data, which is used to determine the polarity of the battery pack. The polarity adapter module 150 sends the first voltage data to the central processing module 160. The central processing module 160 receives the first voltage data and determines the polarity of the connected battery pack. If the collected first voltage data is greater than zero, it is determined that the socket is connected to the positive terminal of the battery pack; if the collected first voltage data is less than zero, it is determined that the socket is connected to the negative terminal of the battery pack. The polarity adapter module 150 is connected between the second socket 112 of the charging output socket 110 and the charging adjustment module 140, and also between the first socket 111 of the charging output socket 110 and the charging adjustment module 140. When the first voltage data collected by the polarity adapter module 150 is greater than zero, the central processing module 160 controls the connection between the positive terminal of the polarity adapter module 150 and the second socket 112 to be connected, and also controls the connection between the negative terminal of the polarity adapter module 150 and the first socket 111 to be connected. When the first voltage data collected by the polarity adapter module 150 is less than zero, the central processing module 160 controls the connection between the negative terminal of the polarity adapter module 150 and the second socket 112 to be connected, and also controls the connection between the positive terminal of the polarity adapter module 150 and the first socket 111 to be connected.

[0046] The voltage detection module 130 is also used to detect the voltage data of the battery pack being charged. It should be noted that the voltage data collected by the voltage detection module 130 is the second voltage data, which is the actual output voltage of the battery pack. The voltage detection module 130 sends the second voltage data to the central processing module 160. The central processing module 160 calculates the required charging voltage for the battery pack based on the second voltage data and sends the required charging voltage data to the charging adjustment module 140. The charging adjustment module 140 controls the output voltage based on the required charging voltage data for the battery pack.

[0047] The charging adjustment module 140 can be used to detect the fully charged state of the battery pack. For example, the charging adjustment module can stop supplying power to the battery pack after it is fully charged. The charging adjustment module 140 can also be used to prevent directional current, protecting the charging circuit and the power supply module. The charging adjustment module 140 can also be used to detect the charge level of the battery pack after it is fully charged.

[0048] Specifically, after the battery pack is fully charged, the charging adjustment module 140 starts timing. After the timing exceeds a preset time, the charging adjustment module 140 disconnects the connection between the power module 120 and the polarity adapter module 150. The charging adjustment module 140 detects the power level of the battery pack through the voltage detection module 130. When the power level of the battery pack decreases, the charging adjustment module 140 reconnects the connection between the power module 120 and the polarity adapter module 150 to recharge the battery pack.

[0049] In this embodiment of the invention, the polarity adaptation module 140 samples the voltage of the battery pack being charged. The central processing module 160 determines the polarity of the battery pack connected to the charging output socket 110 based on the first voltage data obtained from the sampling, ensuring that the battery pack is connected to the correct polarity during charging, thus solving the problem of inconvenient polarity identification of power tool batteries. The voltage detection module 130 calculates the required charging voltage for the battery pack based on the second voltage data obtained from the sampling of the battery pack. The charging adjustment module 140 controls the output voltage according to the required charging voltage of the battery pack, and can match the actual needs of the battery pack being charged. For example, after the battery pack is fully charged, the charging adjustment module 140 starts timing and stops supplying power to the battery pack after the timing exceeds a preset time. The charging adjustment module 140 also detects the charge level of the battery pack through the voltage detection module 130. When the charge level of the battery pack decreases, the charging adjustment module 140 reconnects the connection between the power module 120 and the polarity adapter module 150 to replenish the charge level of the battery pack. This avoids the waste of power caused by not using the power tool's battery pack after it is fully charged, as well as the situation where the battery itself discharges and becomes undercharged due to prolonged non-use.

[0050] Optionally, continue to refer to Figure 1 The voltage detection module 130 includes: a coulomb counter; the first voltage input terminal of the coulomb counter is electrically connected to the first socket 111 of the charging output socket 110, the second voltage input terminal of the coulomb counter is electrically connected to the second socket 112 of the charging output socket 110, and the first voltage output terminal and the second voltage output terminal of the coulomb counter are both connected to the central processing module.

[0051] Specifically, the coulomb counter is used to detect the voltage and charge of the battery pack being charged, and sends the detected data to the central processing module 160, which processes and distributes the detected data.

[0052] Figure 3 This is a schematic diagram of the hardware structure of a charging device for an electric tool provided in another embodiment of the present invention. Optionally, refer to... Figure 3The polarity adapter module 150 includes a first polarity unit 151, a second polarity unit 152, and a voltage data acquisition unit 153. The voltage data acquisition unit 153 of the polarity adapter module 150 includes a first resistor R1 and a second resistor R2; the first end of the first resistor R1 is electrically connected to the first socket 111 of the charging output socket 110, the second end of the first resistor R1 is electrically connected to the central processing module 160, the first end of the second resistor R2 is electrically connected to the second end of the first resistor R1, and the second end of the second resistor R2 is grounded.

[0053] Specifically, the polarity adapter module 150 is used to collect the first voltage data of the battery pack being charged. Since the output voltage range of the battery pack exceeds the input voltage range acceptable to the central processing module 160, a voltage divider resistor needs to be set when collecting the first voltage data to reduce the output voltage range of the battery pack. It should be noted that the first voltage data is only used to determine the polarity of the battery pack connected to the charging output socket; the first voltage data does not reflect the magnitude of the battery pack's voltage. This setting ensures that the voltage input to the central processing module 160 is within the normal operating voltage range of the central processing module 160, preventing damage to the central processing module 160.

[0054] Figure 4 This is a circuit diagram of the first polarity unit provided in an embodiment of the present invention. Figure 5 This is a circuit diagram of the second polarity unit provided in an embodiment of the present invention. Optionally, the output voltage of the charging adjustment module 140 includes a positive voltage and a negative voltage. (Refer to...) Figure 4 The first polarity unit 151 includes: a first indicator LED1, a first relay K1, a first transistor Q1, a first diode D1, and a third resistor R3;

[0055] The anode of the first indicator LED1 is electrically connected to the central processing module 160. The first end of the third resistor R3 is electrically connected to the cathode of the first indicator LED1, and the second end of the third resistor R3 is electrically connected to the base of the first transistor Q1. The emitter of the first transistor Q1 is grounded, and the collector of the first transistor Q1 is electrically connected to the first terminal of the coil of the first relay K1. The anode of the first diode D1 is electrically connected to the first terminal of the coil of the first relay K1, and the cathode of the first diode D1 is electrically connected to the second terminal of the coil of the first relay D1. The common terminal of the first relay D1 is electrically connected to the second socket 112 of the charging output socket 110. The normally open terminal of the first relay K1 is connected to the positive voltage of the charging adjustment module 140, and the normally closed terminal of the first relay K1 is connected to the negative voltage of the charging adjustment module 140.

[0056] Reference Figure 5The second indicator LED2 and the second polarity unit 152 include: a second relay K2, a second transistor Q2, a second diode D2 and a fourth resistor R4;

[0057] The anode of the second indicator LED2 is electrically connected to the central processing module 160. The first end of the fourth resistor R4 is electrically connected to the cathode of the second indicator LED2, and the second end of the fourth resistor R4 is electrically connected to the base of the second transistor Q2. The emitter of the second transistor Q2 is grounded, and the collector of the second transistor Q2 is electrically connected to the first terminal of the coil of the second relay K2. The anode of the second diode D2 is electrically connected to the first terminal of the coil of the second relay K2, and the cathode of the second diode D2 is electrically connected to the second terminal of the coil of the second relay K2. The common terminal of the second relay K2 is electrically connected to the first socket 111 of the charging output socket 110. The normally open terminal of the second relay K2 is connected to the positive voltage of the charging adjustment module 140, and the normally closed terminal of the second relay K2 is connected to the negative voltage of the charging adjustment module 140.

[0058] Specifically, when the first voltage data acquired by the voltage data acquisition unit 153 of the polarity adaptation module 150 is greater than zero, it indicates that the second socket 112 is connected to the positive terminal of the battery pack being charged. The central processing module 160 sends a control signal to the first transistor Q1. After receiving the control signal, the first transistor Q1 turns on, and the first indicator LED1 starts working, indicating the working status of the charging output socket 110 and the polarity of the battery pack being charged. The first relay K1 also turns on, disconnecting the connection between the common terminal and the normally closed terminal and connecting the connection between the common terminal and the normally open terminal. The positive voltage of the charging adjustment module 140 is transmitted to the second socket 112, so that the polarity of the charging output socket 110 matches the polarity of the battery pack being charged, and the battery pack is charged.

[0059] When the first voltage data acquired by the voltage data acquisition unit 153 of the polarity adaptation module 150 is less than zero, it indicates that the battery pack connected to the first socket 111 is the positive terminal. The central processing module 160 sends a control signal to the second transistor Q2. After receiving the control signal, the second transistor Q2 conducts, and the second indicator LED2 starts working, indicating the working status of the charging output socket 110 and the polarity of the battery pack. The second relay K2 also conducts, disconnecting the connection between the common terminal and the normally closed terminal and connecting the common terminal and the normally open terminal. The positive voltage of the charging adjustment module 140 is transmitted to the first socket 111, so that the polarity of the charging output socket 110 matches the polarity of the battery pack and charges the battery pack. This setting ensures that the battery pack is connected to the correct polarity during charging, avoids damage to the battery pack, and protects the battery pack.

[0060] Optionally, the charging adjustment module 140 includes at least one of the following: a charging timeout protection unit 141, a charging current reversal protection unit 142, and a trickle charge recharge protection unit 143.

[0061] Specifically, the charging timeout protection unit 141 is used to detect the status of the battery pack being charged and stop charging after the battery pack is fully charged. The charging current reverse increase protection unit 142 is used to prevent directional current and protect the charging circuit and the power module 120. The trickle charge secondary charging protection unit 143 is used to detect the charge level of the battery pack after it is fully charged and replenish the charge level of the battery pack when the charge level decreases.

[0062] In the above embodiments, the charging timeout protection unit 141, the charging current reverse increase protection unit 142, and the trickle-after secondary charging protection unit 143 can be implemented in various ways. Optionally, the charging timeout protection unit 141 and the trickle-after secondary charging protection unit 143 are both integrated into the central processing module and implemented by the central processing module through software and / or hardware. Optionally, the charging timeout protection unit 141, the charging current reverse increase protection unit 142, and the trickle-after secondary charging protection unit 143 are each independent circuit modules, which will be described in detail below.

[0063] In one embodiment of the present invention, optionally, the charging adjustment module 140 includes a charging timeout protection unit 141. The first terminal of the charging timeout protection unit 141 is connected to the power module 120, the second terminal is connected to the polarity adapter module 150, and the third terminal is connected to the central processing module 160. After the battery pack is fully charged, the charging timeout protection unit 141, the charging current reversal protection unit 142, and the trickle charge secondary charging protection unit 143 of the charging adjustment module 140 are activated. The charging timeout protection module 141 starts a timer after the battery pack is fully charged, and cuts off the power supply to the battery pack after the timer exceeds a set time. The charging timeout protection unit 141 may include, for example, a timer, a controller, etc., and its specific structure is common knowledge in the art and will not be described in detail here.

[0064] In one embodiment of the present invention, optionally, the charging adjustment module 140 includes a charging current reverse increase protection unit 142, which is connected between the power module 120 and the polarity adapter module 150. Since the output voltage of the battery pack after it is fully charged is close to the charging voltage of the charging circuit, the charging current reverse increase protection unit 142 is provided to prevent the battery pack from being reverse charged.

[0065] In one embodiment of the present invention, optionally, the charging adjustment module 140 includes a trickle charge recharge protection unit 143. The first end of the trickle charge recharge protection unit 143 is connected to the power module 120, the second end is connected to the polarity adapter module 150, and the third end is connected to the central processing module 160. After the battery pack is fully charged, the trickle charge recharge protection unit 143 detects the charge level of the battery pack. When the charge level of the battery pack decreases, it reconnects the power supply to the battery pack. This configuration protects the battery pack and the charging circuit, ensures that the battery pack is fully charged, and extends the battery pack's usage time. The trickle charge recharge protection unit 143 may include, for example, a controller and a charge detection unit; its specific structure is common knowledge in the art and will not be described in detail here.

[0066] In other embodiments, the charging adjustment module 140 may optionally include a charging timeout protection unit 141, a charging current reversal protection unit 142, and a trickle charge recharge protection unit 143. The specific connection relationships can be configured as needed in practical applications, and will not be elaborated here.

[0067] Figure 6 This is a circuit diagram of the charging current reverse increase protection unit provided in an embodiment of the present invention. Optionally, the output voltage of the charging adjustment module 140 includes a positive voltage and a negative voltage; refer to... Figure 6 The charging current reverse protection unit 142 includes: a third diode D3 and a fourth diode D4; the cathode of the third diode D3 is electrically connected to the common terminal of the first relay K1, and the anode of the third diode D3 is electrically connected to the normally open terminal of the first relay K1; the cathode of the fourth diode D4 is electrically connected to the common terminal of the second relay K2, and the anode of the fourth diode D4 is electrically connected to the normally open terminal of the second relay K2.

[0068] Specifically, the third diode D3 is connected to the normally open terminal of the first relay K1. The fourth diode D4 is connected to the normally open terminal of the second relay K2. When the common terminal of the relay is connected to the normally open terminal, either the third diode D3 or the fourth diode D4 will be connected to the circuit and begin to operate. It should be noted that the third diode D3 and the fourth diode D4 will not conduct simultaneously. This arrangement prevents reverse charging accidents after the battery pack is fully charged, effectively protecting the charging circuit.

[0069] Figure 7 This is a circuit diagram of a charging device for an electric tool provided in an embodiment of the present invention. (Refer to...) Figure 1 and Figure 7Optionally, this embodiment combines the above embodiments, and the connection relationships of each module and component can be referred to the descriptions in the above embodiments, which will not be repeated here. The working process of the charging device of this electric tool is as follows:

[0070] When the battery pack being charged is connected to the charging output socket 110, the polarity adaptation module 150 collects the voltage data of the battery pack. It should be noted that the voltage data collected by the polarity adaptation module 150 is the first voltage data, which is used to determine the polarity of the battery pack. The polarity adaptation module 150 sends the first voltage data to the central processing module 160. The central processing module 160 receives the first voltage data and determines the polarity of the connected battery pack. If the collected first voltage data is greater than zero, it is determined that the socket is connected to the positive terminal of the battery pack; if the collected first voltage data is less than zero, it is determined that the socket is connected to the negative terminal of the battery pack.

[0071] When the voltage data acquired by the voltage data acquisition unit 153 of the polarity adaptation module 150 is greater than zero, it indicates that the second socket 112 is connected to the positive terminal of the battery pack being charged. The central processing module 160 sends a control signal to the first transistor Q1. After receiving the control signal, the first transistor Q1 turns on, and the first indicator LED1 starts working, indicating the working status of the charging output socket 110 and the polarity of the battery pack being charged. The first relay K1 also turns on, disconnecting the connection between the common terminal and the normally closed terminal and connecting the connection between the common terminal and the normally open terminal. The positive voltage of the charging adjustment module 140 is transmitted to the second socket 112, so that the polarity of the charging output socket 110 matches the polarity of the battery pack being charged, and the battery pack is charged.

[0072] When the first voltage data acquired by the voltage data acquisition unit 153 of the polarity adaptation module 150 is less than zero, it indicates that the battery pack connected to the first socket 111 is the positive terminal. The central processing module 160 sends a control signal to the second transistor Q2. After receiving the control signal, the second transistor Q2 turns on, and the second indicator LED2 starts working, indicating the working status of the charging output socket 110 and the polarity of the battery pack being charged. The second relay K2 also turns on, disconnecting the connection between the common terminal and the normally closed terminal and connecting the connection between the common terminal and the normally open terminal. The positive voltage of the charging adjustment module 140 is transmitted to the first socket 111, so that the polarity of the charging output socket 110 matches the polarity of the battery pack being charged, and the battery pack is charged.

[0073] Once the battery pack is fully charged, the charging adjustment module 140 begins operation. It should be noted that the functions of the charging timeout protection unit 141 and the trickle-charge secondary charging protection unit 143 can also be implemented by the central processing module 160. The following describes how the central processing module 160 implements the functions of the charging timeout protection unit 141 and the trickle-charge secondary charging protection unit 143:

[0074] When the voltage detection module 130 detects that the battery pack is fully charged, the central processing module 160 starts a timer. After the timer exceeds a preset time, the central processing module 160 sends a control command to the polarity adapter module 150. The polarity adapter module 150 then disconnects the charging output socket 110 from the power module 120 according to the control command. After stopping charging the battery pack, the voltage detection module 130 continuously monitors the battery pack. When it detects that the battery pack's charge level has decreased, the central processing module 160 reconnects the power module 120 to the polarity adapter module 150 to recharge the battery pack.

[0075] Figure 8 This is a schematic diagram showing the appearance of a charging cabinet for electric tools provided in an embodiment of the present invention. Optionally, refer to... Figure 8 This embodiment also provides a charging cabinet for electric tools, including: a cabinet body 210, a control motherboard, and a charging device for electric tools provided in any of the above embodiments; wherein, at least one of the power module 120, voltage detection module 130, charging adjustment module 140, polarity adaptation module 150, and central processing module 160 is configured on the control motherboard, and the control motherboard is located inside the cabinet body 210.

[0076] Optionally, the charging cabinet for the power tools also includes: an external power cord and a battery; the battery provides power to the control board and the charging output socket; and the external power cord charges the battery.

[0077] Specifically, the power source for charging the battery pack is the storage battery. An external power line charges the storage battery, converting the AC power from the external power source into DC power during the process. It should be noted that during the charging process of the storage battery, power can be supplied to the battery pack or not; this embodiment does not impose any restrictions on this.

[0078] Optionally, continue to refer to Figure 7 The charging cabinet for electric tools also includes a cabinet door 220 and a fingerprint lock 230. The fingerprint lock 230 is located on the outside of the cabinet door 220 and is connected to the control main board to control the opening and closing status of the cabinet door 220.

[0079] Specifically, the fingerprint lock 230 can record the feature information of multiple users. When a user uses the device, the fingerprint lock 230 sends verification information to the control board. The control board compares the information sent by the fingerprint lock 230 with the previously recorded feature information and returns control commands. The fingerprint lock 230 then controls the opening and closing of the cabinet door according to the control commands.

[0080] Optionally, the charging cabinet for the power tools also includes a temperature sensor and a cooling fan; both the temperature sensor and the cooling fan are connected to the control mainboard; the control mainboard controls the on / off state of the cooling fan based on the detected temperature.

[0081] It should be noted that the power tool charging cabinet provided in this embodiment has the beneficial effects of the power tool charging device provided in any of the above embodiments, which will not be repeated here.

[0082] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and no limitation is imposed herein.

[0083] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A charging device for electric tools, characterized in that, The electric tool is equipped with a battery pack, and the charging device is used to charge the battery pack; the charging device includes: A charging output socket for inserting a battery pack to be charged; the charging output socket includes a first socket and a second socket. The power module is used to provide charging power to the battery pack being charged; A voltage detection module, which is electrically connected to the charging output socket, detects the voltage of the battery pack being charged. A charging adjustment module is electrically connected to the power module. The charging adjustment module adjusts the output voltage of the power module to meet the charging requirements of the battery pack being charged. A polarity adapter module is connected between the second socket of the charging output socket and the charging adjustment module. The polarity adapter module is used to adapt to the positive and negative terminals of the battery pack being charged inserted into the second socket. The central processing module is electrically connected to the power supply module, the voltage detection module, the charging adjustment module, and the polarity adapter module. The central processing module is used to collect the voltage and polarity of the battery pack being charged, and to control the working status of the power supply module, the charging adjustment module, and the polarity adapter module. The polarity adapter module includes a first polarity unit and a second polarity unit, which are connected in parallel. The first polarity unit is connected between the charging adjustment module and the second socket of the charging output socket, and the second polarity unit is connected between the charging adjustment module and the first socket of the charging output socket. The polarity adaptation module collects the first voltage data of the battery pack being charged and sends the first voltage data to the central processing module. The central processing module determines the positive or negative terminal of the battery pack being charged based on the first voltage data. The output voltage of the charging adjustment module includes the positive voltage of the charger and the negative voltage of the charger; the first polarity unit includes: a first indicator light, a first relay, a first transistor, a first diode, and a third resistor; The anode of the first indicator lamp is electrically connected to the central processing module; the first end of the third resistor is electrically connected to the cathode of the first indicator lamp, and the second end of the third resistor is electrically connected to the base of the first transistor; the emitter of the first transistor is grounded, and the collector of the first transistor is electrically connected to the first terminal of the coil of the first relay; the anode of the first diode is electrically connected to the first terminal of the coil of the first relay, and the cathode of the first diode is electrically connected to the second terminal of the coil of the first relay; the common terminal of the first relay is electrically connected to the second socket of the charging output socket, the normally open terminal of the first relay is connected to the positive voltage of the charging adjustment module, and the normally closed terminal of the first relay is connected to the negative voltage of the charging adjustment module; the second polarity unit includes: a second indicator lamp, a second relay, a second transistor, a second diode, and a fourth resistor; The anode of the second indicator lamp is electrically connected to the central processing module; the first end of the fourth resistor is electrically connected to the cathode of the second indicator lamp, and the second end of the fourth resistor is electrically connected to the base of the second transistor; the emitter of the second transistor is grounded, and the collector of the second transistor is electrically connected to the first terminal of the coil of the second relay; the anode of the second diode is electrically connected to the first terminal of the coil of the second relay, and the cathode of the second diode is electrically connected to the second terminal of the coil of the second relay; the common terminal of the second relay is electrically connected to the first socket of the charging output socket, the normally open terminal of the second relay is connected to the positive voltage of the charging adjustment module, and the normally closed terminal of the second relay is connected to the negative voltage of the charging adjustment module.

2. The charging device for electric tools according to claim 1, characterized in that, The polarity adapter module further includes: a first resistor and a second resistor; the first end of the first resistor is electrically connected to the first socket of the charging output socket, the second end of the first resistor is electrically connected to the central processing module, the first end of the second resistor is electrically connected to the second end of the first resistor, and the second end of the second resistor is grounded.

3. The charging device for electric tools according to claim 1, characterized in that, The charging adjustment module includes at least one of the following: a charging timeout protection unit, a charging current reversal protection unit, and a trickle charge recharge protection unit.

4. The charging device for electric tools according to claim 3, characterized in that, The output voltage of the charging adjustment module includes a positive voltage and a negative voltage; the charging current reverse protection unit includes a third diode and a fourth diode; the cathode of the third diode is electrically connected to the common terminal of the first relay, and the anode of the third diode is electrically connected to the normally open terminal of the first relay; the cathode of the fourth diode is electrically connected to the common terminal of the second relay, and the anode of the fourth diode is electrically connected to the normally open terminal of the second relay.

5. The charging device for electric tools according to claim 1, characterized in that, The voltage detection module includes a coulomb meter; the first voltage input terminal of the coulomb meter is electrically connected to the first socket of the charging output socket, the second voltage input terminal of the coulomb meter is electrically connected to the second socket of the charging output socket, and both the first voltage output terminal and the second voltage output terminal of the coulomb meter are connected to the central processing module.

6. A charging cabinet for electric tools, characterized in that, include: The device comprises a cabinet, a control motherboard, and a charging device for an electric tool as described in any one of claims 1-5; wherein at least one of the power supply module, the voltage detection module, the charging adjustment module, the polarity adapter module, and the central processing module is configured on the control motherboard, and the control motherboard is disposed within the cabinet.

7. The charging cabinet for electric tools according to claim 6, characterized in that, Also includes: An external power supply cable and a storage battery; the storage battery provides power to the control motherboard and the charging output socket. The external power supply line charges the battery.

8. The charging cabinet for electric tools according to claim 7, characterized in that, Also includes: The cabinet door and the fingerprint lock; the fingerprint lock is located on the outside of the cabinet door and is connected to the control board to control the opening and closing status of the cabinet door.

9. The charging cabinet for electric tools according to claim 6, characterized in that, Also includes: Temperature sensor and cooling fan; both the temperature sensor and the cooling fan are connected to the control motherboard; The control board controls the on / off state of the cooling fan based on the detected temperature.

Images