LR6 alkaline battery

Analyze the importance of LR6 alkaline battery charging circuit and protection circuit design

The importance of LR6 alkaline battery charging circuit and protection circuit design. In the circuit design with LR6 alkaline battery as power supply, it is required to integrate more and more complex mixed signal systems into a small area chip, which inevitably raises the problem of low voltage and low power consumption for digital and analog circuits. Therefore, the design of LR6 alkaline battery charging circuit and protection circuit is very important.

The necessity of LR6 alkaline battery protection circuit Due to the high energy density of LR6 alkaline battery, in the overcharge state, the energy will be excessive after the battery temperature rises, so the electrolyte decomposes and produces gas, which is easy to cause the internal pressure to rise and cause the risk of spontaneous combustion or rupture; on the contrary, in the over-discharge state, the electrolyte decomposes and causes the battery characteristics and durability to deteriorate, reducing the number of rechargeable times and shortening the battery life. Therefore, the protection of lithium batteries is very important. In LR6 alkaline battery applications, there must be a battery protection chip to prevent overcharging, over-discharging and overcurrent of the battery. In summary, the design of LR6 alkaline battery protection circuit is very important. We require that the LR6 alkaline battery power protection chip can realize the following basic functions: overcharge protection, over-discharge protection, overcurrent protection and short circuit protection. From the above application requirements of lithium batteries, it can be known that in order to improve the service life of lithium batteries and ensure the safe use of batteries.

The LR6 alkaline battery protection circuit needs to have the following functions

(1) If the charging voltage exceeds the maximum value allowed by the battery, it can provide a battery discharge circuit.

(2) If the discharge voltage is lower than the minimum value allowed by the battery, it can provide a battery charging circuit. Then cut off the connection between the battery and the external circuit, and then cut off the connection between the battery and the external circuit.

(3) If the charging and discharging current of the LR6 alkaline battery is greater than the limit value, cut off the connection between the battery and the external circuit.

(4) When the LR6 alkaline battery returns to normal state, the protection circuit should be able to release the protection state accordingly so that the battery can continue to work normally. Issues to note in LR6 alkaline battery circuit design

▲ Overcharging and over-discharging of lithium batteries will affect the battery life.

▲ Pay attention to the charging voltage and charging current of lithium batteries. Then select a suitable charging chip.

▲ Pay attention to prevent overcharging, over-discharging, short-circuit protection and other problems of lithium batteries.

▲ After the design, it must undergo a lot of tests. Design of LR6 alkaline battery charging circuit management When charging a LR6 alkaline battery, the potential applied to the two poles of the battery forces the positive electrode compound to release lithium ions and embed them into the carbon with a layered structure of the negative electrode molecules. When discharging, lithium ions are precipitated from the carbon with a layered structure and recombined with the positive electrode compound. The movement of lithium ions generates current.

Although the principle is very simple, in actual industrial production, there are many more practical issues to consider: the positive electrode material needs additives to maintain the activity of multiple charges and discharges, and the negative electrode material needs to be designed at the molecular structure level to accommodate more lithium ions; the electrolyte filled between the positive and negative electrodes, in addition to maintaining stability, also needs to have good conductivity to reduce the internal resistance of the battery.

When the LR6 alkaline battery is in deep discharge, the charger must have a pre-charge process to make the battery meet the conditions for fast charging; then, according to the fast charging speed recommended by the LR6 alkaline battery manufacturer, generally 1C, the charger charges the battery with a constant current, and the battery voltage rises slowly; once the battery voltage reaches the set termination voltage, the constant current charging is terminated, the charging current decays rapidly, and the charging enters the full charging process.

When we design products that require the use of lithium batteries, we need to design a protection circuit for the LR6 alkaline battery, and only on this basis can we design the charging circuit. Lithium batteries need to have overvoltage charging protection, overvoltage discharge protection, overcurrent discharge protection, short circuit protection, etc. Therefore, when we design a LR6 alkaline battery protection circuit, we must at least achieve the above protection functions.

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