Method and system for preventing passivation of lithium thionyl chloride battery
A lithium sub-battery and power system technology, applied in the field of electronic information, can solve problems such as increasing system costs, and achieve the effect of avoiding the failure of power discharge, alleviating or avoiding the formation of passivation film
Inactive Publication Date: 2011-06-15
上海复展智能科技股份有限公司
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[0037] The invention discloses a method for preventing the passivation of a lithium sub-battery. The lithium sub-battery is used as a second power supply to supply power to a power consumption system; the power supply to the power consumption system also includes a first power supply. The first power source may be a power source such as a dry battery. The electricity consumption system may be a water meter, a gas meter or an electric meter.
[0038] see figure 2 , image 3 , the method includes the steps of:
[0039] 【Step S1】The voltage of the first power supply is detected by the detection circuit. When the voltage of the first power supply is lower than the set value V1 (close to exhaustion, but not exhausted), the lithium sub-battery and the large current discharge circuit are activated by activating the control switch. Turn on and count the time. Wherein, the discharge current of the large current discharge circuit is the same as the current required for the deactiva...
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The invention discloses a method and a system for preventing passivation of a lithium thionyl chloride battery. The lithium thionyl chloride battery serves as a second power supply for supplying power to a power consumption system; and the power supplies for supplying power to the power consumption system further comprise a first power supply; the method comprises the following steps: detecting the voltage of the first power supply via a detection circuit, and closing the power supply of the first power supply via a control switch when the voltage of the first power supply is lower than a set value; starting up a high current operating module of the power consumption system so that the current required by the module is corresponding to the current required by deactivation of the lithium thionyl chloride battery in order to activate the lithium thionyl chloride battery at a time. The method and the system for preventing passivation of the lithium thionyl chloride battery provided by the invention can mitigate or avoid the generation of a passivating film by means of one-time discharging for the lithium thionyl chloride battery, thereby avoiding the phenomenon that electricity can not be discharged when the electricity is available.
Description
technical field [0001] The invention belongs to the technical field of electronic information, and relates to a method for preventing passivation of a battery, in particular to a method for preventing passivation of a lithium sub-battery; in addition, the invention further relates to a system for preventing the passivation of a lithium sub-battery. Background technique [0002] Lithium sub-battery is used as the mainstream power supply of modern smart meters (mainly referring to smart water, electricity, gas and heat meters). Lithium-ion batteries have unique advantages that other chemical power sources do not have; such as high and stable operating voltage; wide temperature range; high energy density; long shelf life; no pollution. However, lithium thionyl chloride batteries have the disadvantage of voltage hysteresis. [0003] The reason for affecting the voltage hysteresis is that a dense lithium chloride film is formed on the surface of the positive electrode after meta...
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IPC IPC(8): H01M10/42H01M10/44
CPCY02E60/12Y02E60/10
Inventor 刘荣鑫顾晓升
Owner 上海复展智能科技股份有限公司