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Management device and method for battery charging

A technology for battery charge management and power management, applied in the direction of battery circuit devices, circuit devices, collectors, etc., can solve the problems of increased hardware cost, high power consumption, complexity, etc., achieve low power consumption design, reduce complexity and cost , The effect of simple battery charge management

Active Publication Date: 2009-04-01
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The charging management in the case of current shutdown is through the I 2 The C bus reads the power of the battery, which is more complicated to implement. Generally, it needs to be implemented with the software of the MCU (micro control unit), which increases the hardware cost and consumes a lot of power when it is implemented.

Method used

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  • Management device and method for battery charging
  • Management device and method for battery charging
  • Management device and method for battery charging

Examples

Experimental program
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Embodiment 1

[0028] This embodiment is suitable for charging and managing the battery module in the shutdown state, and the battery module includes a battery and a battery parameter output unit. In the prior art, the battery module is also called a smart battery, and the battery parameter output unit is usually implemented by a chip, which is responsible for collecting and calculating battery parameters such as battery power and battery charging current, and outputting high and low level signals to indicate the battery charging current with or without.

[0029] Please refer to Figure 4 , the battery charging management device includes a power management circuit and a power switching circuit 6, the power management circuit includes a charging start management unit 4, a charging end management unit 5, a charging management unit 8 at shutdown time, a setting unit 1, a first time generating unit 2 and Timer 3, the output terminal of the setting unit 1 is coupled to the input terminal of the ...

Embodiment 2

[0045] In Embodiment 1, whether the adapter is in place is not considered when the timer counts. When the timer counts to the set time, the control power switching circuit is turned on. At this time, if the adapter is not in place, the battery cannot be charged, but once the adapter is plugged in, That is, the battery can be charged.

[0046] Compared with the first embodiment, the charging management device of this embodiment is different in that the existence of the adapter is considered in the charging start step, and an adapter presence detection unit is added, and the adapter presence detection unit is used to detect whether the adapter is in position, And output the corresponding control signal to the timer. Its charging management flow chart is as follows: figure 2 As shown, when the timer counts, it detects whether the adapter is in place. When the adapter is in place, the timer is controlled to suspend timing. When the adapter is not in place, the timer is controlle...

Embodiment 3

[0048] Compared with the first and second embodiments, the charging management device of this embodiment differs in the charging management at the shutdown time, and a charging management unit 8 at the shutdown time is added. The charging management unit 8 at the shutdown time in this embodiment includes a battery power acquisition module, a judgment module and a calculation module. Among them, the battery power acquisition module is used to obtain the power Qs of the battery at the shutdown time when the power is turned off; CT In comparison, when the power is higher than the charging threshold power at the time of shutdown, the third control signal is output, and when the power is lower than the charging threshold power at the time of shutdown, the fourth control signal is output to the charging start management unit 4; the calculation module is used to respond to the third control Signal, calculate the power Qs at the time of shutdown and drop to the charging threshold powe...

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Abstract

The invention discloses a battery charging management device under the shutdown state and a method thereof, and the method comprises the charging starting management step under the shutdown state and the charging finish management step after full charging. The charging starting management step comprises the following steps: A1 after each time of full charging and switching the power supply switching circuit to the interruption state, timing is started; B1, when the counted time reaches a first time, the electrical source manage circuit controls the electrical switching circuit to be the turn-on state, so as to communicate the battery module with the electrical source. The invention also discloses a method for managing battery charging. The invention facilitates battery charging management to become simple under the shutdown state and realizes the low-power consumption design under the shutdown state.

Description

【Technical field】 [0001] The invention relates to charge management of a rechargeable battery, in particular to a battery charge management device and method in a shutdown state. 【Background technique】 [0002] Many devices today support rechargeable battery power, such as portable ultrasound systems. The rechargeable battery needs to be charged automatically when the power is low, and needs to be automatically disconnected after charging is completed, which requires the battery module to be equipped with a charging management module. Usually, the battery module includes a battery and a battery parameter output unit, and the battery parameter output unit usually has two output ports, one is I 2 C interface, can make the CPU of the system through the I 2 The C interface reads the power of the battery; the other output port outputs the charging current indicator signal, which outputs a low level when the charging current is not zero (that is, the battery is charging), and ou...

Claims

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Application Information

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IPC IPC(8): H02J7/00
Inventor 张立国杜亚军
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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