Abstract: The disclosure relates to a battery capacity meter and a lithium battery. The battery capacity meter includes: a meter housing having a mounting cavity formed inside the meter housing; and a circuit board assembly mounted in the mounting cavity, the circuit board assembly including a first circuit board, a second circuit board, a display component and a controller, the first circuit board and the second circuit board being stacked and electrically connected to each other, the display component being mounted on the first circuit board, and the controller being mounted on the second circuit board and electrically connected to the display component.

Abstract: A parking air conditioning device and a mounting bracket thereof are provided. The mounting bracket includes a loading frame. The loading frame includes a bottom bracket and a first connecting member fixedly connected to the bottom bracket to form a mounting position. The mounting frame includes a second connecting member and a plurality of first bolts. The second connecting member is located at a side of the first connecting member away from the mounting position and is spaced apart from the first connecting member. The first bolts are connected to the first connecting member and the second connecting member. When the mounting bracket is connected to a vehicle body crossbeam, the first bolts are respectively located at the upper and lower sides of the vehicle body crossbeam, and the first connecting member and the second connecting member clamp the vehicle body crossbeam.

Abstract: The present disclosure relates to a charging device. By providing a charge-enabled pin and an engage-enabled pin with different lengths in the charging interface of the charging device, the engage-enabled pin is firstly in contact with a battery when charging. At this time, a charging management circuit controls an LLC half-bridge resonant power supply to soft start. A third end of the charging management circuit outputs a signal to drive a first switch to be turned on, and the output end of the LLC half-bridge resonant power supply charges the battery, and charging soft start and zero-voltage connection are achieved. During the unplugging process, the charge-enabled pin is firstly removed from the battery, and zero-current disconnection can be achieved when unplugging the other pins of the charging interface.

Abstract: The present disclosure relates to an overvoltage protection circuit and a charging device. A voltage applied to a PFC power supply on an input side is collected through an input voltage sampling circuit and an amplifier circuit, and a data processing capability of a charging management circuit is used to determine whether the applied voltage exceeds a preset voltage threshold. The preset voltage threshold refers to a voltage that is not greater than a minimum withstand voltage of an input device of the charger. The power factor correction power supply is controlled to operate to charge the battery to be charged when it is determined that the voltage applied does not exceed the preset voltage threshold, to prevent damage to the input device due to a connection to two phases of voltage.

Abstract: A positive-and-negative electrode fixture of battery modules is provided, comprising the following components: a battery module body; a module end plate, located at the front and back of the battery module body, respectively; a busbar insulation fixture, clamped on the module end plate; and a busbar, arranged on the upper end face of the busbar insulation fixture, having one side fixedly connected with the battery module body and the other side fixedly connected with the busbar insulation fixture through a bolt and a nut, with the nut arranged between the busbar insulation fixture and the busbar. The present invention has such advantages as simple structure, convenient installation and disassembly and replacement of parts, improved production efficiency and reduced production cost, stable structure, high connection reliability, and strong overcurrent capacity.