A disclosed battery management system for wireless charging includes a communication circuit and a controller. The communication circuit receives information on a first state of charge (SOC) of the first battery module, a second SOC of the second battery module, and a third SOC of the third battery module. The controller controls the first wireless charging between the first battery module and the second battery module and the second wireless charging between the second battery module and the third battery module for balancing between the first SOC, the second SOC, and the third SOC. The first wireless charging is to wirelessly transmit power from one of the first battery module and the second battery module to the other battery module. The second wireless charging is to wirelessly transmit power from one of the second battery module and the third battery module to the other battery module.

A system for detecting a defective battery using wireless communications. The system includes first sensors and a first master device. The first sensors are matched on a 1:1 basis with first battery modules to monitor the first battery modules. The first master device communicates with the first sensors. The respective first sensors each include a first monitoring circuit which collects a primary data on a 1:1-matched first battery module in a monitoring mode, and a first communicating circuit which outputs the primary data to the first master device in a communicating mode. The first monitoring circuit is turned off in the communicating mode. The first communicating circuit is turned off in the monitoring mode.

A pressure measuring unit including: a body part configured to have an upper surface, a lower surface, and a plurality of side surfaces; a connector part configured to be provided to at least one side surface among the plurality of side surfaces of the body part; a pressure measuring part coupled to the upper surface of the body part and configured to measure a pressure applied toward the upper surface of the body part from the outside to generate a pressure value; and a control part connected to the pressure measuring part to receive the measured pressure value from the pressure measuring part and configured to output the received pressure value to a communication line connected thereto.

The present invention relates to a battery cell with improved safety and a method of manufacturing the same, and more particularly a battery cell configured such that an electrode assembly including a positive electrode (200) and a negative electrode (300) located so as to be opposite each other in the state in which a separator (400) is interposed therebetween is received in a cell case (100), wherein the positive electrode (200) includes a positive electrode plate (210) and a positive electrode active material layer (220) provided on one surface and/or the other surface of the positive electrode plate (210), the negative electrode (300) includes a negative electrode plate (310) and a negative electrode active material layer (320) provided on one surface and/or the other surface of the negative electrode plate (310), the positive electrode active material layer (220) includes a first flat portion (221) and a first inclined portion (222) provided at each of opposite sides of the first flat portion (221), and the negative electrode active material layer (320) includes a second flat portion (321) and a second inclined portion (322) provided at each of opposite sides of the second flat portion (321) and a method of manufacturing the same.

The present invention relates to a battery cell with improved safety and a method of manufacturing the same, and more particularly a battery cell configured such that an electrode assembly including a positive electrode (200) and a negative electrode (300) located so as to be opposite each other in the state in which a separator (400) is interposed therebetween is received in a cell case (100), wherein the positive electrode (200) includes a positive electrode plate (210) and a positive electrode active material layer (220) provided on one surface and/or the other surface of the positive electrode plate (210), the negative electrode (300) includes a negative electrode plate (310) and a negative electrode active material layer (320) provided on one surface and/or the other surface of the negative electrode plate (310), the positive electrode active material layer (220) includes a first flat portion (221) and a first inclined portion (222) provided at each of opposite sides of the first flat portion (221), and the negative electrode active material layer (320) includes a second flat portion (321) and a second inclined portion (322) provided at each of opposite sides of the second flat portion (321) and a method of manufacturing the same.

The present application relates to a battery module, which includes a first type of battery cells and a second type of battery cells electrically connected in series. The first type of battery cells and the second type of battery cells are battery cells with different chemical systems. The first type of battery cells includes N first battery cells, and the second type of battery cells includes M second battery cells, where N and M are greater than or equal one. The present application also relates to a battery pack and an electric apparatus including the battery module, and method and device for manufacturing the battery module.

The present application discloses a method, apparatus, device, and system for monitoring battery pack safety. The method includes: obtaining, based on obtained stress data of a battery pack in an electric vehicle, stress energy information of the battery pack; determining a target-level alarm condition based on the stress energy information and sending corresponding alarm information, where the target-level alarm condition is a level of alarm condition in preset N levels of alarm conditions that the stress energy information satisfies, an i.sup.th level of alarm condition indicates that there are m.sub.i occurrences of impact energy represented by the stress energy information that is within an i.sup.th energy threshold range, and a lower limit of the i.sup.th energy threshold range of the i.sup.th level of alarm condition is greater than an upper limit of an (i−1).sup.th energy threshold range of an (i−1).sup.th level of alarm condition, and m.sub.i<m.sub.i-1.

The present disclosure provides a battery protection circuit board and a preparation method thereof. The battery protection circuit board includes a first battery protection board and a second battery protection board, a hardness of the first battery protection board being greater than a hardness of the second battery protection board. The soldering method includes: preparing a first to-be-soldered region of the first battery protection board and preparing a second to-be-soldered region of the second battery protection board; preparing a first copper paste in the first to-be-soldered region of the first battery protection board and preparing a second copper paste in the second to-be-soldered region of the second battery protection board; and bonding the first to-be-soldered region of the first battery protection board and the second to-be-soldered region of the second battery protection board by the first copper paste and the second copper paste.

A power regulation unit is provided for regulating power to or from a power tool battery pack. The power regulation unit includes power regulation circuitry and a controller. The power regulation circuitry is configured to regulate a received power. The controller is connected to the power regulation circuitry. The controller is configured to receive input power from one or more battery cells, regulate the input power by performing at least one of a voltage regulation and a current regulation, and output a regulated output power. For voltage regulation, the regulated output power includes a constant voltage regardless of an operating current of the power tool. For current regulation, the regulated output power includes a constant voltage up to a predetermined current threshold.

A battery system with a passive thermal management system is formed from a plurality of battery cells arranged on a printed circuit board assembly. In some cases, the printed circuit board assembly may include a flexible printed circuit board that is folded along an axis forming an upper and lower portion of the printed circuit board assembly. The thermal management system may include fire-blocking foam members individually attached to each battery cell. The battery cells may be arranged in a grid-like pattern to allow for a spacing arrangement between the battery cells to keep a failing battery cell from negatively affecting an adjacent battery cell. In addition, the flexible printed circuit card may include a fuse for each battery cell to shut off any current flow to a faulty battery cell if it begins to fail causing current flow to exceed beyond a predetermined current limit. The battery system may be a conformal wearable battery.