This application claims the priority benefit of Taiwan Application Serial No. 110126970, filed on Jul. 22, 2021. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of specification.
The disclosure relates to a battery device and a battery protection method for same.
In a case that an electronic product has not been used for a long time, a capacity of a battery keeps decreasing due to continuous self-consumption of a system and the battery. In this case, copper precipitation occurs when the capacity of the battery decreases to an extreme low capacity. When copper precipitation occurs, crystals precipitate and puncture an isolating film to cause a short circuit during charging of the battery. Therefore, when the battery has an extreme low electrical capacity, deep discharge protection needs to be activated to prevent the battery from failing.
According to the first aspect, a battery device is provided. The battery device includes a battery and a control chip. The control chip is coupled to the battery, and is configured to: measure an electrical capacity of the battery, and control the battery device to enter a shutdown mode. The control chip determines, according to the electrical capacity of the battery, whether the battery device communicates with an electronic device, and whether the battery is being charged or discharged, whether to control the battery device to enter the shutdown mode.
According to the second aspect, a battery protection method for a battery device is provided. The battery device is configured to supply electric power to an electronic device. The battery device includes a battery. The battery protection method for a battery device includes the following steps: measuring an electrical capacity of the battery; determining whether the electrical capacity of the battery is less than a preset capacity; determining whether the battery device communicates with the electronic device; and determining whether the battery is being charged or discharged. When the electrical capacity of the battery is less than the preset capacity, the battery device does not communicate with the electronic device, and the battery is not being charged or discharged, the control chip controls the battery device to enter a shutdown mode.
Based on the above, in the disclosure, it is determined, according to the electrical capacity of the battery, whether the battery device communicates with the electronic device, and whether the battery is being charged or discharged, whether to control the battery device to enter the shutdown mode. When the electrical capacity of the battery is less than the preset capacity, the battery device does not communicate with the electronic device, and the battery is not being charged or discharged, the battery device is directly controlled to enter the shutdown mode to make the battery device perform deep discharge protection in advance. In this way, self-consumption of the battery device is significantly decreased and an allowable time for an electronic product to be left unused is extended. Therefore, the battery is effectively protected and prevented from failing.
In order to make the content of the disclosure understood more easily, embodiments are specifically provided below as examples for the disclosure to be implemented. In addition, where possible, elements/components/steps with the same labels in the drawings and implementations represent the same or similar parts.
Referring to
The control chip 108 measures an electrical capacity of the battery 106, and determines, according to the electrical capacity of the battery 106, whether the battery device 102 communicates with the electronic device 104, and whether the battery 106 is being charged or discharged, whether to control the battery device 102 to enter a shutdown mode. In an embodiment, the control chip 108 obtains the electrical capacity of the battery 106 by measuring a voltage of the battery 106. In an embodiment, the battery device 102 communicates with the electronic device 104 through a system bus. The disclosure is not limited thereto. In an embodiment, the control chip 108 transmits an electrical capacity measuring signal to the electronic device 104 through the system bus to make the electronic device 104 obtain the electrical capacity of the battery 106. In addition, whether the battery 106 is being charged or discharged means whether the battery 106 is being charged or discharged in response to a charge or discharge control instruction of the control chip 108 or the electronic device 104. The battery 106 supplies the electric power to the electronic device 104 through the power switch 110.
When the electrical capacity of the battery 106 is less than the preset capacity, the battery device 102 does not communicate with the electronic device 104, and the battery 106 is not being charged or discharged, the control chip 108 and the power switch 110 enter the shutdown mode to make the battery device 102 directly perform deep discharge protection. Compared with the prior art in which power consumption of the battery device 102 is decreased progressively, the battery device 102 in this embodiment directly minimizes the power consumption of the battery device 102, thereby extending an allowable time for the battery device 102 and the electronic device 104 to be left unused. In this way, the battery is effectively protected and prevented from failing.
Further, when the voltage of the battery 106 decreases to a preset voltage of the battery 106 corresponding to the preset capacity (in an embodiment, the preset capacity is any value from 0% to 5%, but is not limited thereto), the control chip 108 directly disconnects the power switch 110 and decreases self-power consumption to enter a low energy consumption state. Referring to
However, in the conventional battery device, the total consumption current of the battery gradually decreases as the electrical capacity of the battery decreases. According to the curve CI2 in
Referring to
Referring to
In the shutdown mode, the power switch of the battery device is disconnected to prevent the battery of the battery device from supplying electric power to the electronic device through the power switch. In addition, the control chip of the battery device is enabled to enter the low energy consumption state to decrease the total consumption current of the battery to the corresponding total consumption current of the battery when deep discharge protection is performed. In this way, the self-consumption of the battery device is significantly decreased and the allowable time for the battery device and the electronic device to be left unused is extended. Therefore, the battery is effectively protected and prevented from failing. In the low energy consumption state, the control chip receives, for example, only the operating voltage required for wakeup. In some embodiments, the battery device decreases the self-consumption of the battery device by removing the power voltage required for the operation of the control chip or cutting off the power supply path of the control chip.
In summary, in the disclosure, it is determined, according to the electrical capacity of the battery, whether the battery device communicates with the electronic device, and whether the battery is being charged or discharged, whether to control the battery device to enter the shutdown mode. When the electrical capacity of the battery is less than the preset capacity, the battery device does not communicate with the electronic device, and the battery is not being charged or discharged, the battery device is directly controlled to enter the shutdown mode (in the shutdown mode, the power switch is disconnected and the control chip is in the low energy consumption state) to make the battery device perform deep discharge protection in advance. In this way, the self-consumption of the battery device is significantly decreased and an allowable time for an electronic product to be left unused is extended. Therefore, the battery is effectively protected and prevented from failing. In this way, even though the electronic device is left unused for a long time, the battery is still chargeable to make the battery device supply electric power to the electronic device normally.
The disclosure has been disclosed above with embodiments; however, the embodiments are not intended to limit the disclosure. Any person of ordinary skill in the art can make some changes and modifications without departing from the spirit and scope of the disclosure. Thus, the protection scope of the disclosure should be subject to that defined by the appended claims.
Number | Date | Country | Kind |
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110126970 | Jul 2021 | TW | national |