A first voltage detection device includes a first holding body, a first voltage detection portion held by the first holding body, and a first conductor attached to the first holding body, at least a portion of the conductor being functioning as a fuse.

A battery pack (2000) includes a secondary battery (2020), a sensor (2040), and a control device (2060). The secondary battery (2020) supplies electric power to a flying object (10). The sensor (2040) outputs a measurement value related to a force applied to the secondary battery (2020) or a periphery of the secondary battery. The control device (2060) has a determination unit (2062). The determination unit (2062) determines a danger level of the secondary battery (2020) based on the measurement value of the sensor (2040).

The present disclosure relates to the technical field of energy storage devices, and in particular, to a battery module and a battery pack. The battery module includes: a plurality of battery cells stacked in sequence, the plurality of battery cells being provided with vents; and a circuit board arranged above the plurality of battery cells. The circuit board is provided with a temperature sensing device, and a position of each of the temperature sensing device corresponds to positions of the vents. The temperature sensing device is connected to a battery management system to form a circuit, and the circuit is disconnected when any one of the vents is blasted.

The power supply device including: a plurality of secondary battery cells each including a gas discharge valve for discharging internal gas; a plurality of voltage detection lines for detecting voltage of the corresponding plurality of secondary battery cells; a plurality of current fuses provided in the respective plurality of voltage detection lines to shut off current flow when currents flowing through the respective voltage detection lines exceed a predetermined value; and gas guide path communicating with the gas discharge valve to discharge gas discharged from the gas discharge valve to the outside. At least one of the plurality of current fuses is disposed in gas guide path, and is composed of thermal fuse that shuts off current flow depending on temperature of the gas discharged from the gas discharge valve.

A busbar for a battery module includes a first portion configured to be coupled to a first terminal of a first battery cell, a second portion configured to be coupled to a second terminal of a second battery cell, and a fuse portion extending between the first portion and the second portion. The fuse portion includes a number of openings extending through the fuse portion. Each pair of openings defines an electrical path between the first portion of the busbar and the second portion of the busbar.

A battery pack includes: a housing, in which an accommodation space is made available; a cell module, accommodated in the accommodation space, and including a plurality of stacked cells, each cell comprises a cell housing, a first tab and a second tab, and the tabs extend out of the accommodation space; an adapter board, disposed on the cell module, where the first tab and the second tab are welded onto the adapter board; a circuit board, where the circuit board is arranged adjacent to the adapter board; a first connecting strip, one end is connected to the first tab, another end is connected to a positive input end of the circuit board; and a second connecting strip, one end is connected to the second tab, another end of is connected to a negative input end of the circuit board.

A secondary battery protection circuit for a secondary battery includes: a reference voltage circuit configured to generate a reference voltage by using a depletion-type transistor and a transistor unit of enhancement type connected in series with the depletion-type transistor; a voltage divider configured to output a detection voltage obtained by dividing a power source voltage of the secondary battery; a detection circuit configured to detect an abnormal state of the secondary battery based on the reference voltage and the detection voltage; a first adjustment circuit configured to adjust a size ratio of the depletion-type transistor to the transistor unit based on threshold voltages of the depletion-type transistor and the transistor unit; and a second adjustment circuit configured to adjust the detection voltage based on the reference voltage after adjusting the size ratio.

A battery pack includes a pair of battery modules having a plurality of first partition walls formed to extend downward from a lower surface thereof, a supporting plate having a plurality of second partition walls formed to extend upward from an upper surface thereof and a gas discharge hole formed at a longitudinal center thereof, the supporting plate being coupled to a bottom of the pair of battery modules such that plurality of first partition walls and the plurality of second partition walls are adjacent and overlap each other in one-to-one pairs and a BMS assembly coupled to an upper portion of the pair of battery modules in a plug-in type.

A lithium battery cell with an internal fuse component without any welded tabs present for conductance from the internal portion thereof externally to power a subject device is provided. Disclosed herein are lithium ion (liquid electrolyte) battery configurations utilizing thin metallized film current collectors as conducting tabs that provide full electrical conductivity from one pole to another throughout the internal portions of the battery with sufficient space for liquid electrolyte flow as well. Such thin metallized film current collectors thus provide both safety features with low electrical charge runaway potential, low internal resistance, and high thermal conductivity with a simplified manner of providing external electrical conductivity simultaneously.

An electrical connector configured to connect terminals of battery units in a battery pack includes a body made of an electrically conductive material, the body having at least a first body part and a second body part, and at least one terminal connection part disposed adjacent the first body part configured to connect to the terminal of the battery unit. The at least one terminal connection part includes a first connection component and a second connection component spaced apart from each other. Each of the first and second connection components includes a contact part for contacting the terminal of the battery unit, and a stem connecting the contact part to the body. The stem has a smaller cross section than the contact part. The stem is operable as a fuse configured to cut off an excessively high current.