A heating system includes: an alkaline secondary battery and a controller. The alkaline secondary battery includes: a power generating element configured to be charged or discharged; and a battery case that accommodates the power generating element in a hermetically sealed state. The controller is configured to control charging and discharging of the alkaline secondary battery, and, when an internal pressure of the alkaline secondary battery is higher than or equal to a first threshold, execute a heating process for heating the alkaline secondary battery by decreasing the internal pressure through discharging of the alkaline secondary battery. The heating process is a process of raising a temperature of the alkaline secondary battery.

The present invention relates to A NiMH battery charger (100) for charging a NiMH battery pack (101) with a plurality of NiMH battery cells (C1,C2,C3). The NiMH battery charger (100) comprises a converting unit (102) operable to receive an input voltage (Vin) and a control signal (D) and operable to generate a charge current (Iout) and/or a charge voltage (Vout) based on the input voltage (Vin) and the control signal (D). The NiMH battery charger (100) further comprises a measuring unit (103) operable to measure the charge voltage (Vout) and to measure the charge current (Iout), the measuring unit is further operable to measure a surface temperature (Text) of the NiMH battery pack with a temperature sensor (106). The NiMH battery charger (100) further comprises a controlling unit (104) operable to receive the measured charge voltage (Vout), the measured charge current (Iout), and the measured surface temperature (Text). The controlling unit is further operable to determine a gas partial pressure (px) by means of a physical battery model (300) and based on the measured surface temperature (Text), charge voltage (Vout), and charge current (Iout). The controlling unit (104) is further operable to generate the control signal (D) for controlling the converting unit (102) to generate the charge current (Iout) and/or the charge voltage (Vout) based on the determined gas partial pressure (px). The present invention also relates to a controlling method for a NiMH battery charger.

The present invention relates to a method (200) for generating a status signal (SS) indicating a battery condition status of a NiMH battery pack (101) comprising a plurality of NiMH cells (C1,C2,C3) using a monitoring unit (100). The monitoring unit (100) comprises: a measuring unit (102) operable to generate a data signal (DS) comprising information about measurements from the group of an internal pressure (Pi) of the NiMH battery pack (101): a battery voltage (Vb) of the NiMH battery pack (101); a battery current (Ib) flowing to, or from. the NiMH battery pack (101): a surface temperature (Text) of the NiMH battery pack (101). The monitoring unit further comprises a controlling unit (103) operable to receive the data signal (DS) from the measuring unit (102) and operable to generate the status signal (SS) wherein the controlling unit (103) is further operable to estimate the internal pressure of the NiMH battery pack (101) with a physical battery model (300). The method (200) comprising measuring (S1) the internal pressure; measuring (S2) the battery voltage (Vb); measuring (S3) the battery current (Ib); measuring (S4) the surface temperature (Text) of the NiMH battery pack; estimating (S5) an internal gas pressure of the NiMH battery pack (101) using the physical battery model (300) and said measurements; generating (S6) the status signal indicating a battery condition status of the NiMH battery pack (101) based on a differential pressure between the estimated internal pressure and the measured internal pressure.

A battery pack includes a battery block including battery cells connected to one another and a case accommodating the battery block. Each battery cell includes a discharge valve on an end surface of the cell which is configured to open when an internal pressure exceeds a predetermined pressure. The battery cells are arranged on a straight line such that respective end surfaces of the calls face each other. The battery block has a discharge gap between the end surfaces of the cells facing each other which is configured to guide exhaust gas from the discharge valve The case includes lower case, an upper case, a heat dissipation plate arranged in lower case and between the lower case and battery block, and a bendable heat-resistant cover protruding from a side edge of the heat dissipation plate and arranged at a position covering an opening of discharge gap.

This document describes techniques for capacitive sensing to detect battery deformations during wireless charging of rechargeable batteries. An example system includes a processor that detects the placement of a mobile device with a rechargeable battery on a wireless charger. Before or during the charging session, the processor obtains capacitance values from multiple capacitive sensors integrated into or on the wireless charger. The processor analyzes the capacitance values and determines whether they indicate the deformation of the rechargeable battery, which may be caused by swelling or enlargement. In response to determining that the capacitance values indicate the deformation of the rechargeable battery, the processor does not initiate or terminates the charging session. In this way, the described techniques and systems can monitor for battery swelling and protect consumers and their mobile devices from the effects of battery swelling.

In one aspect, a device includes a processor, at least one system component accessible to the processor. a battery which powers the processor and the at least one system component, an impedance sensor that is accessible to the processor and that senses impedance of the battery, and storage accessible to the processor. The storage bears instructions executable by the processor to receive input from the impedance sensor regarding an impedance of the battery and, based at least in pan on the input, determine whether to perform at least one action to at least attempt to bring impedance of the battery below an impedance threshold.

An all-solid-state secondary battery system comprising: a sealed battery having formed by housing, in an outer package, a stacked battery; a jig adapted to constrain the sealed battery in the stacking direction; one or more contact pressure sensors provided at least either between an outermost layer surface of the stacked battery and the outer package or in the inside of the stacked battery; one or more gas pressure sensors provided in a space inside the outer package; and a control device adapted to stop charging by judging as an overcharge state only when the change in contact pressure sensed by at least one of the contact pressure sensors is equal to or more than a threshold value, and the change in gas pressure sensed by at least one of the gas pressure sensors is equal to or more than the threshold value.

Embodiments of this application relate to the field of power source control technologies, and disclose a control system and a charging and discharging control system. The control system includes a control circuit and an intermediate computer, where the control circuit includes a pressure sensor, a piezoelectric valve, and a controller; the pressure sensor is configured to collect pressure information; the controller is configured to receive the pressure information collected by the pressure sensor and transmit the pressure information to an intermediate computer; the intermediate computer is configured to transmit the pressure information to an upper computer, receive a preset pressure value generated by the upper computer based on the pressure information, and transmit the preset pressure value to the controller; and the controller is further configured to control the piezoelectric valve based on the preset pressure value.

A charging method for an electrochemical device includes the following steps: in a first cycle stage, a charging stage of the first cycle stage has a first cut-off current; and in a second cycle stage, a charging stage of the second cycle stage has a second cut-off current, and the second cut-off current is greater than the first cut-off current. According to the charging method for an electrochemical device, an electronic device, and a readable storage medium provided in the present application, the risk of cyclic gas generation of the electrochemical device can be effectively prevented, and the service life of the electrochemical device can be improved.

A battery management system includes one or more fiber optic sensors configured to be disposed within an electrochemical battery. Each fiber optic sensor is capable of receiving input light and providing output light that varies based on the input light and an amount of free or dissolved gas present within the battery. A detector detects the output light and generates an electrical detector signal in response to the output light. Battery management circuitry determines the state of the battery based at least in part on the detector signal.