Abstract: An electrical device includes a housing, at least one adapter interface to enable one or more battery packs to be detachably mounted to the electrical device, a control module, and a communication module including a wireless communication module and a storage module. The storage module is used for storing an upgrade file from an external device. The upgrade file includes an upgrade program to update the program of the control module. The communication module is configured to receive the upgrade file from the external device through a wireless communication module, store the upgrade file in the storage module, and send the upgrade file to the control module to update the program of the control module if preset conditions are met.

Abstract: This invention relates to a robust optimal design method for photovoltaic cells. Firstly, the deterministic optimal model is established, which is solved by Monte Carlo method to obtain the maximum output power value of optimization objective and its corresponding design variable value, and then the design variable value obtained from deterministic optimization is deemed as the initial point of the mean value of the robust optimal design variable. Later, the robust optimal model is solved by Monte Carlo method in order to obtain the mean value of design variable, and then appropriate materials and manufacturing techniques are selected for corresponding photovoltaic components according to the design variable obtained, so as to achieve the robust optimal design of photovoltaic cells. In fact, this invention improves the output stability and reliability of photovoltaic cells.

Abstract: A power tool system includes a power tool and a cloud sever configured to receive an upgrading file for upgrading the power tool. The power tool is adapted for wireless communication with the cloud server and includes a motor, a driving module for driving the motor, a control module for outputting a control signal to the driving module, and an IoT module for establishing a wireless communication link between the power tool and the cloud server. The IoT module, the driving module and control module share a bus, and the upgrading file is simultaneously distributed to the control module and/or the driving module through the bus.

Abstract: This invention relates to a robust optimal design method for photovoltaic cells. Firstly, the deterministic optimal model is established, which is solved by Monte Carlo method to obtain the maximum output power value of optimization objective and its corresponding design variable value, and then the design variable value obtained from deterministic optimization is deemed as the initial point of the mean value of the robust optimal design variable. Later, the robust optimal model is solved by Monte Carlo method in order to obtain the mean value of design variable, and then appropriate materials and manufacturing techniques are selected for corresponding photovoltaic components according to the design variable obtained, so as to achieve the robust optimal design of photovoltaic cells. In fact, this invention improves the output stability and reliability of photovoltaic cells.

Abstract: The present teaching relates to request management and data recovery in a data system. In one example, a failure in connection with first data is detected at a first node in a data system. Information associated with a most recent transaction related to the first node is obtained from the persistent storage. Each of other nodes in the data system is requested to transmit one or more transaction requests previously sent to the first node after the most recent transaction. The one or more transaction requests are received from at least one of the other nodes. A sequence of one or more transactions associated with the one or more transaction requests is determined. The one or more transactions are executed according to the sequence in order to recover the first data at the first node.

Abstract: A power tool system includes a power tool; a battery pack detachably connected to the power tool, and a cloud server capable of wirelessly communicating with the power tool. The power tool includes a wireless communication unit configured to establish a wireless communication link with an external device and a file storage unit coupled to the wireless communication unit and configured to store content data in a preset data structure. The preset data structure includes a packet header configured for information transmission, a packet tail including a check bit, and a data packet body including a data length, a data type, a packet serial number, data content and an electronic serial number. A simple and efficient method of deduplicating data is used to release the memory space of the memory and improve data transmission efficiency.

Abstract: An electrical device includes a housing, at least one adapter interface to enable one or more battery packs to be detachably mounted to the electrical device, a control module, and a communication module including a wireless communication module and a storage module. The storage module is used for storing an upgrade file from an external device. The upgrade file includes an upgrade program to update the program of the control module. The communication module is configured to receive the upgrade file from the external device through a wireless communication module, store the upgrade file in the storage module, and send the upgrade file to the control module to update the program of the control module if preset conditions are met.

Abstract: A battery pack includes a housing, a battery cell group accommodated in the housing, a plurality of battery pack connection terminals coupled to the connection terminals of an electrical device, including a battery pack positive power terminal electrically connected to a positive pole of the battery cell group, a battery pack negative power terminal electrically connected to a negative pole of the battery cell group, a first battery pack terminal to transmit a first type of data, and a second battery pack terminal to transmit a second type of data. Also, a data transmission method between the battery pack and the electrical device enables data collection for data analysis while ensuring normal operation of the battery pack and the electrical device.

Abstract: The present teaching relates to scheduling transactions at a node in a data system. In one example, a request is obtained for performing a first transaction at the node. A mixing condition associated with the first transaction is determined. The first transaction is initiated. The first transaction is suspended when the mixing condition is met. A second transaction is carried out at the node. The first transaction and the second transaction are directed to a same portion of data at the node.

Abstract: An electrical device includes a housing, at least one adapter interface to enable one or more battery packs to be detachably mounted to the electrical device, a control module, and a communication module including a wireless communication module and a storage module. The storage module is used for storing an upgrade file from an external device. The upgrade file includes an upgrade program to update the program of the control module. The communication module is configured to receive the upgrade file from the external device through a wireless communication module, store the upgrade file in the storage module, and send the upgrade file to the control module to update the program of the control module if preset conditions are met.

Abstract: An electrical device includes a housing, at least one adapter interface to enable one or more battery packs to be detachably mounted to the electrical device, a control module, and a communication module including a wireless communication module and a storage module. The storage module is used for storing an upgrade file from an external device. The upgrade file includes an upgrade program to update the program of the control module. The communication module is configured to receive the upgrade file from the external device through a wireless communication module, store the upgrade file in the storage module, and send the upgrade file to the control module to update the program of the control module if preset conditions are met.

Abstract: A battery pack includes a housing, a battery cell group accommodated in the housing, a plurality of battery pack connection terminals coupled to the connection terminals of an electrical device, including a battery pack positive power terminal electrically connected to a negative pole of the battery cell group, a battery pack negative power terminal electrically connected to a positive pole of the battery cell group, a first battery pack terminal to transmit a first type of data, and a second battery pack terminal to transmit a second type of data. Also, a data transmission method between the battery pack and the electrical device enables data collection for data analysis while ensuring normal operation of the battery pack and the electrical device.

Abstract: A power tool system includes a power tool; a battery pack detachably connected to the power tool, and a cloud server capable of wirelessly communicating with the power tool. The power tool includes a wireless communication unit configured to establish a wireless communication link with an external device and a file storage unit coupled to the wireless communication unit and configured to store content data in a preset data structure. The preset data structure includes a packet header configured for information transmission, a packet tail including a check bit, and a data packet body including a data length, a data type, a packet serial number, data content and an electronic serial number. A simple and efficient method of deduplicating data is used to release the memory space of the memory and improve data transmission efficiency.

Abstract: A power tool system includes a power tool and a cloud sever configured to receive an upgrading file for upgrading the power tool. The power tool is adapted for wireless communication with the cloud server and includes a motor, a driving module for driving the motor, a control module for outputting a control signal to the driving module, and an IoT module for establishing a wireless communication link between the power tool and the cloud server. The IoT module, the driving module and control module share a bus, and the upgrading file is simultaneously distributed to the control module and/or the driving module through the bus.

Abstract: The present teaching relates to request management and data recovery in a data system. In one example, a request is received for a transaction of data by a first node in the data system. A second node in the data system is determined based on the request. The second node is to carry out the transaction. The request is stored into a first request queue at the first node. The request is sent to the second node. A notice is obtained indicating that information associated with the transaction has been persistently stored. The request is removed from the first request queue in response to the notice.

Abstract: The present teaching relates to managing a request in a data system of a plurality of nodes in a network. In one example, a request is received for a transaction of data by a first node in the data system. A second node in the data system is determined based on the request, where the second node is to carry out the transaction. The request is stored into a first request queue at the first node. The request is sent to the second node. A notice is obtained by the first node indicating that information associated with the transaction has been persistently stored. The request is removed from the first request queue in response to the notice being obtained.

Abstract: The present teaching relates to scheduling transactions at a node in a data system. In one example, a request is obtained for performing a first transaction at the node. A mixing condition associated with the first transaction is determined. The first transaction is initiated. The first transaction is suspended when the mixing condition is met. A second transaction is carried out at the node. The first transaction and the second transaction are directed to a same portion of data at the node.

Abstract: The present teaching relates to scheduling transactions at a node in a data system. In one example, a request is obtained for performing a first transaction at the node. A mixing condition associated with the first transaction is determined. The first transaction is initiated. The first transaction is suspended when the mixing condition is met. A second transaction is carried out at the node. The first transaction and the second transaction are directed to a same portion of data at the node.

Abstract: The present teaching relates to scheduling transactions at a node in a data system. In one example, a request is obtained for performing a first transaction at the node. A mixing condition associated with the first transaction is determined. The first transaction is initiated. The first transaction is suspended when the mixing condition is met. A second transaction is carried out at the node. The first transaction and the second transaction are directed to a same portion of data at the node.

Abstract: The present teaching relates to request management and data recovery in a data system. In one example, a request is received for a transaction of data by a first node in the data system. A second node in the data system is determined based on the request. The second node is to carry out the transaction. The request is stored into a first request queue at the first node. The request is sent to the second node. A notice is obtained indicating that information associated with the transaction has been persistently stored. The request is removed from the first request queue in response to the notice.