Abstract: A safety device comprises a first heat dissipation part, a second heat dissipation part and a connecting part. The connecting part is arranged between the first heat dissipation part and the second heat dissipation part, and at least one heat locking hole disposed thereon. The heat locking hole of the connecting part can reduce a diffusion speed of heat of the connecting part, so that the heat is concentrated between the first heat locking hole and the second heat locking hole, and thus the connecting part can be fused in time at a high temperature.

Abstract: The invention provides a voltage balancing system for balancing controlling of voltage of battery cells including a first set of battery cells and a second set of battery cells connected in series. The system includes a high-side analog front end (AFE) connected to the first set of battery cells, a low-side analog front end (AFE) connected to the second set of battery cells, a microcontroller communicating with the high-side AFE and the low-side AFE, and a communication isolating module interconnecting between the high-side AFE and the microcontroller. The system further includes a balancing module arranged at a back end of the low-side AFE or the high-side AFE to equalize voltages output by the low-side AFE and the high-side AFE. Compared with the prior arts, the system employs a balancing module to balance the voltages of the two sets of battery cells, which can shorten the voltage difference therebetween.

Abstract: An electric energy storage device which includes four energy units with a substantially same voltage value is provided. Each energy unit is provided with a positive electrode and a negative electrode. The electric energy storage device comprises a socket with eight independently arranged electrode terminals that are connected with the four energy units. The disclosure also provides an electric tool system using the electric energy storage device. The electric tool is provided with plugs that may be connected with the four energy units in different states, allowing the electric energy storage device to output multiple voltages.

Abstract: The invention provides a voltage balancing system for balancing controlling of voltage of battery cells including a first set of battery cells and a second set of battery cells connected in series. The system includes a high-side analog front end (AFE) connected to the first set of battery cells, a low-side analog front end (AFE) connected to the second set of battery cells, a microcontroller communicating with the high-side AFE and the low-side AFE, and a communication isolating module interconnecting between the high-side AFE and the microcontroller. The system further includes a balancing module arranged at a back end of the low-side AFE or the high-side AFE to equalize voltages output by the low-side AFE and the high-side AFE. Compared with the prior arts, the system employs a balancing module to balance the voltages of the two sets of battery cells, which can shorten the voltage difference therebetween.

Abstract: The disclosure provides an electric energy storage device which includes four energy units with a substantially same voltage value. Each energy unit is provided with a positive electrode and a negative electrode. The electric energy storage device comprises a socket with eight independently arranged electrode terminals that are connected with the four energy units. The disclosure also provides an electric tool system using the electric energy storage device. The electric tool is provided with plugs that may be connected with the four energy units in different states, allowing the electric energy storage device to output multiple voltages.

Abstract: The disclosure provides a battery pack, a tool system, a charging system, an adapter and using methods thereof. The battery pack comprises a battery assembly, a charging assembly and a discharging assembly. The charging assembly matches the battery assembly to charge the battery assembly by an external power source. The discharging assembly matches the battery assembly to supply power to the electric equipment through the battery assembly. The discharging assembly comprises a discharging coil and a discharging integration module matched with the discharging coil, so that the battery assembly outputs electrical energy through the discharging assembly in a non-contact manner.

Abstract: A power tool system includes a first and second power tools with different rated-voltages and a battery pack supplying power to the corresponding power tool. The battery pack has a battery module with two battery cell groups and a female connector having four conductive terminals respectively connected to positive and negative electrodes of two battery cell groups. The female connector has a converter switching the connection of two battery cell groups between parallel connected state to isolated connected state through connecting or disconnecting two conductive terminals with same polarity together. The first power tool includes a first male connector connected to the female connector to connect two battery cell groups in series through connecting two conductive terminals with different polarities together. The second power tool has a second male connector coupled to the female connector to connect two battery cell groups in parallel through connecting two conductive terminals with same polarity together.

Abstract: The disclosure provides an electric energy storage device which includes four energy units with a substantially same voltage value. Each energy unit is provided with a positive electrode and a negative electrode. The electric energy storage device comprises a socket with eight independently arranged electrode terminals that are connected with the four energy units. The disclosure also provides an electric tool system using the electric energy storage device. The electric tool is provided with plugs that may be connected with the four energy units in different states, allowing the electric energy storage device to output multiple voltages.

Abstract: The disclosure provides a power tool and power tool system, including: a first slot and a second slot; when the power tool is in a double-pack working state, battery packs are respectively arranged in the first slot and the second lot; when the power tool is in a single-pack working state, the battery pack is arranged in the first slot or the second slot, and both the double-pack working state and the single-pack working state provides a same rated voltage to the power tool

Abstract: The disclosure provides an electric energy storage device which includes four energy units with a substantially same voltage value. Each energy unit is provided with a positive electrode and a negative electrode. The electric energy storage device comprises a socket with eight independently arranged electrode terminals that are connected with the four energy units. The disclosure also provides an electric tool system using the electric energy storage device. The electric tool is provided with plugs that may be connected with the four energy units in different states, allowing the electric energy storage device to output multiple voltages.

Abstract: The disclosure provides a battery charging circuit, a battery pack and a battery pack charging system. The battery charging circuit includes a first control switch, a switch control unit and a power supply unit. The first control switch is arranged between the charging positive terminal and the positive electrode of the battery pack, or between the charging negative terminal and the negative electrode of the battery pack, and it is an NMOS transistor with a body diode. The switch control unit is connected to the gate, source, and drain of the first control switch and controls the on-off of the first control switch by sampling a voltage between the source and the drain of the first control switch. The output end of the power supply unit is connected to the power source end of the switch control unit to supply power to the switch control unit.

Abstract: A voltage sampling circuit is provided for sampling voltage of at least two sets of cells in a battery pack includes at least two analog front ends including a low-side analog front end connected to a first set of cells and a high-side analog front end connected to a second set of cells, a subtractor has a positive input end and a negative input end, the positive input end connecting to the output of the high-side analog front end for receiving the analog voltage output by the high-side analog front end. When the first set of cells is connected with the second set of cells in series, the negative input end of the subtractor connecting to the total positive the first set of cells, when the first set of cells is connected with the second set of cells in parallel, the negative input end of the subtractor is grounded.

Abstract: The present disclosure provides an image processing method and a display device including rows of actual pixels each including actual sub-pixels, and starting positions of actual sub-pixels in odd-numbered and even-numbered rows are staggered by a distance of half of an actual sub-pixel. The method includes: determining rows of theoretical pixels corresponding to a to-be-displayed image, each theoretical pixel including theoretical sub-pixels, each actual pixel corresponding to at least two theoretical pixels; calculating grayscale data of each actual sub-pixel in a manner of: for a target actual pixel, determining a rendering mode for calculating grayscale data of each actual sub-pixel of the target actual pixel according to whether there is a specified detail feature in a pixel area where target theoretical pixels corresponding to the target actual pixel are located, different rendering modes are employed when there is or there is not a specified detail feature in the pixel area.

Abstract: A display device and a display control method, and the display device includes: a backlight module, a first display panel, and a second display panel, and a processor. The processor is configured to: acquire a pixel grayscale matrix of an image to be displayed; determine desired brightness of each pixel by using a grayscale-brightness curve of the second display panel based on the pixel grayscale matrix; determine set light-emitting brightness of backlight partition according to grayscale information in the pixel grayscale matrix corresponding to the backlight partition; obtain a first corrected brightness of each backlight partition based on light diffusion coefficients of the plurality of backlight partitions; determine a grayscale of pixel unit according to a brightness difference between the first corrected brightness and the desired brightness; obtain a second corrected brightness of the backlight partition.

Abstract: The disclosure provides an electric energy storage device which includes four energy units with a substantially same voltage value. Each energy unit is provided with a positive electrode and a negative electrode. The electric energy storage device comprises a socket with eight independently arranged electrode terminals that are connected with the four energy units. The disclosure also provides an electric tool system using the electric energy storage device. The electric tool is provided with plugs that may be connected with the four energy units in different states, allowing the electric energy storage device to output multiple voltages.

Abstract: A battery pack transport system includes a battery pack and a protective member assembled on the battery pack for preventing the battery pack from damage during shipping. The battery pack includes two battery cell groups each having a positive electrode and a negative electrode and a female connector electrically connected to two battery cell groups to connect two battery cell groups in parallel. The protective member engages with the female connector to change two battery cell groups from parallel connected state to isolated state.

Abstract: The disclosure provides an electric energy storage device which includes four energy units with a substantially same voltage value. Each energy unit is provided with a positive electrode and a negative electrode. The electric energy storage device comprises a socket with eight independently arranged electrode terminals that are connected with the four energy units. The disclosure also provides an electric tool system using the electric energy storage device. The electric tool is provided with plugs that may be connected with the four energy units in different states, allowing the electric energy storage device to output multiple voltages.

Abstract: A display device and a display control method, and the display device includes: a backlight module, a first display panel, and a second display panel, and a processor. The processor is configured to: acquire a pixel grayscale matrix of an image to be displayed; determine desired brightness of each pixel by using a grayscale-brightness curve of the second display panel based on the pixel grayscale matrix; determine set light-emitting brightness of backlight partition according to grayscale information in the pixel grayscale matrix corresponding to the backlight partition; obtain a first corrected brightness of each backlight partition based on light diffusion coefficients of the plurality of backlight partitions; determine a grayscale of pixel unit according to a brightness difference between the first corrected brightness and the desired brightness; obtain a second corrected brightness of the backlight partition.

Abstract: The disclosure provides an energy storage device comprising four energy units with a same rated voltage and a socket, wherein the four energy units are equally divided into two energy modules, and the socket comprises two voltage output terminals respectively connected with a positive electrode and a negative electrode of the electric energy storage device. The socket is further provided with an in-module control part for switching the connection state of two energy units in the energy modules and an inter-module control part for switching the connection state between the two energy modules. The disclosure provides an electric tool system, wherein the electric tool is provided with a plug coupled with a socket. The energy storage device can provide three output voltages, which can be matched with electric tools with different rated voltages, improves the adaptability of the electric energy storage devices, and reduces the cost.

Abstract: An electric energy storage device comprises four energy units with a same rated voltage and a socket. The four energy units are divided into two energy modules each comprising with two energy units. Each energy module is provided with a positive electrode and a negative electrode. The socket includes four voltage output terminals connected to the positive and negative electrodes of the two energy modules and is provided with two control parts, which respectively control the two energy units in the two corresponding energy modules to switch between parallel state and series state. An electric tool system is also provided, comprising a plug that is connected to the socket, and different plugs can connect the four energy units in different connection states. The electric energy storage device with multiple output voltages can be matched with various electric tools with different rated voltages, and reduces the cost.