A battery monitoring circuit measures individual battery cell voltages and temperatures of a plurality of series-connected battery cells utilizing an Analog Front End, a controller that collects and analyzes the data digitally transferred to it by the Analog Front End, and a Fuel Gauge configured to measure a single battery cell.

The present disclosure relates to a battery management device for balancing state of charges (SOCs) of a plurality of battery cells while maintaining a substrate temperature of a substrate to which a balancing resistor of each of a plurality of battery cells is mounted to a reference temperature or below. Since the substrate temperature is maintained at the reference temperature or below by controlling the duty cycle of a balancing switch, it is possible to prevent components included in the battery management device from being overheated and damaged due to the heat generated during the balancing process.

A battery assembly includes a plurality of cells stacked to form an array and a plurality of spacers each disposed between an adjacent pair of the cells. Each cell includes at least one terminal. Each of the spacers includes a retainer extending from an edge portion of the spacer. The retainers are configured to orient and engage a busbar for connecting the terminals of an adjacent pair of cells. The battery assembly may also include a busbar module. The busbar module may engage with the retainers to hold the busbar module to the array.

A control unit for a battery system, comprising: a microcontroller configured to generate a first control signal; a monitoring unit configured to generate a fault signal indicative of the operational state of the microcontroller; a first signal source configured to generate a state signal indicative of a system state; a comparator circuit configured to generate an intermediate control signal based on a first control signal and a fault signal; the comparator circuit further comprising a comparator node, the comparator circuit configured to transmit the intermediate control signal to the comparator node; wherein the first signal source is connected to the comparator node to transmit the state signal to the comparator node; the comparator circuit further comprises a comparator connected to the comparator node and configured to generate a switch control signal based on a voltage on the comparator node and based on a threshold voltage.

A secondary battery protection circuit for controlling charge and discharge using a switching circuit to protect a secondary battery from temperature is provided. The switching circuit is configured to be provided in a charge-and-discharge path between the secondary battery and an external device. The secondary battery protection circuit includes a detection terminal configured to be electrically connected, via a resistor, to between the switching circuit and the external device. The secondary battery protection circuit includes a first terminal configured to be electrically connected to a temperature detection terminal of the external device. The secondary battery protection circuit includes a second terminal to which a temperature sensitive element is configured to be electrically connected, the temperature sensitive element having a characteristic value varying in accordance with a change in temperature of the secondary battery.

A battery pack includes a pack case configured to form an appearance, a plurality of battery modules configured to include at least one battery cell; at least one insulation member provided between the plurality of battery modules; and an energy drain unit spaced apart from the insulation member and connected to any one battery module, the energy drain unit being configured to externally short-circuit any one battery module when thermal runaway occurs in at least one battery module.

A battery sensor device includes; a bus bar having a resistor and disposed in a power supply path from a battery; a sensor substrate configured to detect current flowing through the resistor; an output end configured to externally output a signal based on current detected by the sensor substrate; and a battery terminal unit configured to electrically couple the bus bar and the battery. A sensor unit including the bus bar and the output end is separate from the battery terminal unit. The sensor unit has a structure capable of being fixed onto the battery terminal unit in two modes in a reverse relation in a plane.

A connection member configured to electrically connect respective storage elements to each other in a power storage device constituted by a plurality of storage elements. The connection member includes: a substrate; and a plurality of connecting portions connected to electrodes of the respective storage elements and configured to cut off electric connection with the storage elements by fusing at the time when a current of a predetermined value or more flows therein. The connecting portion is formed by performing punching on the substrate and includes at least two bent portions bent in a punching direction. One of the bent portions is bent along a first direction perpendicular to the punching direction, and the other one of the bent portions is bent along a second direction perpendicular to the punching direction and perpendicular to the first direction.

This disclosure generally relates to one or more safety mechanisms of a rechargeable battery for light electric vehicles. The rechargeable battery may include a housing containing a battery management system and at least one battery cell, and a communication system communicatively coupled to the battery management system, where the communication system wirelessly communicates information received from the battery management system to a device external to the rechargeable battery. The rechargeable battery may include a housing formed of a first clamshell member and a second clamshell member. The rechargeable battery may include a first protrusion portion extending from an interior surface of the first clamshell member and a second protrusion portion extending from the interior surface of the second clamshell member toward the first protrusion portion such that the first and second protrusion portions physically contact one another when a force is applied to an external surface of the housing.

A cover assembly includes a cover, a wire assembly, and a bottom cover. The cover includes a first groove formed to extend in a first direction and a second groove formed to extend in the first direction, parallel to the first groove. The wire assembly includes a first wire and a second wire positioned in the first groove and the second groove, respectively, and a third wire connected to a thermistor and positioned along one side of the cover. The bottom cover extends in a shape of the wire assembly, and is coupled to the cover to secure the wire assembly.