Abstract: A power tool system and a battery pack. The battery pack includes a housing provided with a socket, and two battery cell groups received in the housing. Each battery cell group has a positive electrode and a negative electrode. The socket has four conductive terminals respectively and electrically connected to the electrodes of two battery cell groups. Two battery cell groups can be switched between isolated state and series connected state to output two different voltages through two conductive terminals with different polarities being disconnected or connected to each other, and the two conductive terminals with different polarities are respectively connected to two battery cell groups.

Abstract: A system for unsupervised deep representation learning based on image translation is provided. The system includes an image translation transformation module used for performing a random translation transformation on an image and generating an auxiliary label; an image mask module connected with the image translation transformation module and used for applying a mask to the image after translation transformation; a deep neural network connected with the image mask module and used for predicting an actual auxiliary label of the image after the mask is applied and learning the deep representation of the image; a regression loss function module connected with the deep neural network and used for updating parameters of the deep neural network based on a loss function; and a feature extraction module connected with the deep neural network and used for extracting the representation of the image.

Abstract: A multi-modal adaptive fusion deep clustering model based on an auto-encoder includes an encoder structure, a multi-modal adaptive fusion layer, a decoder structure and a deep embedding clustering layer. The encoder is configured to enable a dataset to be respectively subjected to three types of nonlinear mappings of the auto-encoder, a convolutional auto-encoder and a convolutional variational auto-encoder to obtain potential features, respectively. The multi-modal adaptive feature fusion layer is configured to fuse the potential features into a common subspace in an adaptive spatial feature fusion mode to obtain a fused feature. The decoder is configured to decode the fused feature by using a structure symmetrical to the encoder to obtain a decoded reconstructed dataset. The deep embedding clustering layer is configured to cluster the fused feature Z and obtain a final accuracy ACC by comparing a clustering result with a true label.

Abstract: An electric energy storage device, the electric energy storage device configured to be detachably coupled with an electrical device, the electric energy storage device comprises a housing, N sets of battery units received in the housing, N being a composite number, each battery unit comprising at least one battery cell, a plurality of switches, each switch connected to the output end of two different battery units, a control unit electrically connected to the switches and configured to control the switches to switch on or off in order to connect the battery units in parallel or series, wherein the electric energy storage device can output at least three different voltages. The electric energy storage device can be used for different types of power tools with different voltage requirements.

Abstract: An electric energy storage device, the electric energy storage device configured to be detachably coupled with an electrical device, the electric energy storage device comprises a housing, N sets of battery units received in the housing, N being a composite number, each battery unit comprising at least one battery cell, a plurality of switches, each switch connected to the output end of two different battery units, a control unit electrically connected to the switches and configured to control the switches to switch on or off in order to connect the battery units in parallel or series, wherein the electric energy storage device can output at least three different voltages. The electric energy storage device can be used for different types of power tools with different voltage requirements.

Abstract: An adapter comprises an input port being coupleable with a single-voltage output interface of a single-voltage battery pack or a multi-voltage output interface of a multi-voltage battery pack, an output port electrically connected to the input port and being coupleable with a single-voltage input interface of a first power tool or a multi-voltage input interface of a second power tool, a switching mechanism being switchable between a first state and a second state. When the switching mechanism is in the first state, the input port is coupled with the single-voltage output interface and the output port is coupled with the multi-voltage input interface of the second power tool, when the switching mechanism is in the second state, the input port is coupled with the multi-voltage output interface and the output port is coupled with the single-voltage input interface of the first power tool.

Abstract: An adapter for connecting a multi-voltage battery pack to a power tool, the multi-voltage battery pack provided with a multi-voltage battery interface and configured to output at least two different voltages, the power tool provided with a power tool interface and detachable coupled with a single voltage battery pack, the multi-voltage battery interface being not coupleable to the power tool interface, the adapter has a housing, an input port disposed in the housing and provided for electrically and mechanically coupling with the multi-voltage battery interface of the multi-voltage voltage battery pack, an output port disposed in the housing and provided for electrically and mechanically coupling with the power tool interface of the power tool, the input port electrically connected with the output port, wherein the power tool can be powered by the multi-voltage battery pack via the adapter.

Abstract: An adapter for connecting a single voltage battery pack to a power tool, the single voltage battery pack configured to output only one voltage and provided with a single voltage battery interface, the power tool detachable coupled with a multi-voltage battery pack and provided with a power tool interface, the single voltage battery interface being not coupleable to the power tool interface, the adapter comprising a housing, an input interface disposed in the housing and provided for electrically and mechanically coupling with the single voltage battery interface of the single voltage battery pack, an output interface disposed in the housing and provided for electrically and mechanically coupling with the power tool interface of the power tool, the input interface electrically connected with the output interface, wherein the power tool can be powered by the single voltage battery pack through the adapter.

Abstract: An adapter comprises an input port being coupleable with a single-voltage output interface of a single-voltage battery pack or a multi-voltage output interface of a multi-voltage battery pack, an output port electrically connected to the input port and being coupleable with a single-voltage input interface of a first power tool or a multi-voltage input interface of a second power tool, a switching mechanism being switchable between a first state and a second state. When the switching mechanism is in the first state, the input port is coupled with the single-voltage output interface and the output port is coupled with the multi-voltage input interface of the second power tool, when the switching mechanism is in the second state, the input port is coupled with the multi-voltage output interface and the output port is coupled with the single-voltage input interface of the first power tool.

Abstract: The disclosure provides an electric vehicle. The electric vehicle includes: a vehicle body provided with a power input port and a power supply device. The power supply device includes a charger and a detachable battery pack. The charger includes a power interface for obtaining external power, a charging portion provided with a docking interface, an output part, and a control unit. The output part includes a first power output interface connected with the power input port to supply power to the electric vehicle. When the power interface is connected with the external power, the control unit controls the charging portion to charge the battery pack.

Abstract: An adapter comprises an input port being coupleable with a single-voltage output interface of a single-voltage battery pack or a multi-voltage output interface of a multi-voltage battery pack, an output port electrically connected to the input port and being coupleable with a single-voltage input interface of a first power tool or a multi-voltage input interface of a second power tool, a switching mechanism being switchable between a first state and a second state. When the switching mechanism is in the first state, the input port is coupled with the single-voltage output interface and the output port is coupled with the multi-voltage input interface of the second power tool, when the switching mechanism is in the second state, the input port is coupled with the multi-voltage output interface and the output port is coupled with the single-voltage input interface of the first power tool.

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: An electric energy storage device, comprising N energy units with a same rated voltage and provided with a socket, wherein the N energy units are equally divided into M energy modules. Each energy module comprises K energy units, wherein M?2 and K?2, and can be switched between parallel and series connection states. The disclosure also provides an electric tool system, wherein the electric tools with different rated voltages have different plugs, and the electric energy storage device outputs different voltages after connecting with the socket. The electric energy storage device with multiple output voltages can be suitable for electric energy storage devices with different rated voltages, and reduces the cost.

Abstract: An adapter for connecting a multi-voltage battery pack to a power tool, the multi-voltage battery pack provided with a multi-voltage battery interface and configured to output at least two different voltages, the power tool provided with a power tool interface and detachable coupled with a single voltage battery pack, the multi-voltage battery interface being not coupleable to the power tool interface, the adapter has a housing, an input port disposed in the housing and provided for electrically and mechanically coupling with the multi-voltage battery interface of the multi-voltage voltage battery pack, an output port disposed in the housing and provided for electrically and mechanically coupling with the power tool interface of the power tool, the input port electrically connected with the output port, wherein the power tool can be powered by the multi-voltage battery pack via the adapter.

Abstract: An adapter comprises an input port being coupleable with a single-voltage output interface of a single-voltage battery pack or a multi-voltage output interface of a multi-voltage battery pack, an output port electrically connected to the input port and being coupleable with a single-voltage input interface of a first power tool or a multi-voltage input interface of a second power tool, a switching mechanism being switchable between a first state and a second state. When the switching mechanism is in the first state, the input port is coupled with the single-voltage output interface and the output port is coupled with the multi-voltage input interface of the second power tool, when the switching mechanism is in the second state, the input port is coupled with the multi-voltage output interface and the output port is coupled with the single-voltage input interface of the first power tool.

Abstract: An adapter for connecting a single voltage battery pack to a power tool, the single voltage battery pack configured to output only one voltage and provided with a single voltage battery interface, the power tool detachable coupled with a multi-voltage battery pack and provided with a power tool interface, the single voltage battery interface being not coupleable to the power tool interface, the adapter comprising a housing, an input interface disposed in the housing and provided for electrically and mechanically coupling with the single voltage battery interface of the single voltage battery pack, an output interface disposed in the housing and provided for electrically and mechanically coupling with the power tool interface of the power tool, the input interface electrically connected with the output interface, wherein the power tool can be powered by the single voltage battery pack through the adapter.

Abstract: An electric energy storage device, the electric energy storage device configured to be detachably coupled with an electrical device, the electric energy storage device comprises a housing, N sets of battery units received in the housing, N being a composite number, each battery unit comprising at least one battery cell, a plurality of switches, each switch connected to the output end of two different battery units, a control unit electrically connected to the switches and configured to control the switches to switch on or off in order to connect the battery units in parallel or series, wherein the electric energy storage device can output at least three different voltages. The electric energy storage device can be used for different types of power tools with different voltage requirements.

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: A power tool system and a battery pack. The battery pack includes a housing provided with a socket, and two battery cell groups received in the housing. Each battery cell group has a positive electrode and a negative electrode. The socket has four conductive terminals respectively and electrically connected to the electrodes of two battery cell groups. Two battery cell groups can be switched between isolated state and series connected state to output two different voltages through two conductive terminals with different polarities being disconnected or connected to each other, and the two conductive terminals with different polarities are respectively connected to two battery cell groups.