Methods and devices for battery protection

Patent metadata

Field	Value
Publication number	US-9660301-B2
Application number	US-201414327632-A
Country	US
Kind code	B2
Filing date	Jul 10, 2014
Priority date	Oct 29, 2013
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

An electronic apparatus is provided. The electronic apparatus includes: a battery; at least one pressure sensor provided on a surface of the battery; and a controller electrically connected with the at least one pressure sensor. The at least one pressure sensor samples a pressure parameter on the surface of the battery. The controller acquires the pressure parameter, detects a magnitude relation between the pressure parameter and a predefined threshold value, and generates a control instruction for protecting the battery based on the detected magnitude relation.

First claim

What is claimed is:

1. An electronic apparatus, comprising:
a housing;
a battery;
at least one pressure sensor provided on an outer surface of the battery and adjacent to a side of the housing; and
a controller electrically connected with the at least one pressure sensor, wherein
the at least one pressure sensor samples a pressure parameter on the outer surface of the battery; and
the controller is programmed to:
acquire the pressure parameter, detect a magnitude relation between the pressure parameter and a predefined threshold value, and generate a control instruction for protecting the battery based on the detected magnitude relation;
wherein the controller is further programmed to:
detect, at a predetermined time interval, magnitude relations between the pressure parameter and a first threshold value, a second threshold value, and a third threshold value, the first threshold value being lower than the second threshold value, and the second threshold value being lower than the third threshold value; and
generate a reminder information displaying instruction for triggering the electronic apparatus to issue a reminder alert, if the controller detects that the pressure parameter is above the first threshold value and below the second threshold value.

2. The electronic apparatus according to claim 1 , wherein the controller is further programmed to generate a sleep instruction for triggering the battery to enter into a sleep state, if the controller detects that the pressure parameter is above the second threshold value and below the third threshold value.

3. The electronic apparatus according to claim 2 , wherein the controller is further programmed to:
detect whether the pressure parameter recovers to be below the second threshold value after the battery enters into the sleep state, and
generate a sleep recover instruction for triggering the battery to recover from the sleep state to a normal operating state if the controller detects that the recovered pressure parameter is below the second threshold value.

4. The electronic apparatus according to claim 1 , wherein the controller is further programmed to generate a permanent failure instruction for triggering the battery to enter into a permanent failure state, if the detected result is that the pressure parameter is above the third threshold value.

5. The electronic apparatus according to claim 1 , wherein, the at least one pressure sensor includes a plurality of pressure sensors, the plurality of pressure sensors are provided at different positions on the outer surface of the battery.

Assignees

• Xiaomi Inc

Inventors

• Zheng Zhongxiang
• Zhang Jianjun
• Li Jinchao

Classifications

• H01M10/48

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• G05B9/02

  electric · CPC title

• H01M10/425 Primary

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• G01R31/18

  Subjecting similar articles in turn to test, e.g. go/no-go tests in mass production · CPC title

• H01M2010/4271

  Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing · CPC title