Lithium ion battery in use common five questions

Source: 2020 - 04 - 15 18:52 hits: lithium ion battery five common problems of the lithium ion battery in use process should pay attention to the problems are: the overcharge, over discharge, over current, charge imbalance problems and the influence of environment temperature on the battery life. These problems can cause serious damage to the battery, even lead to the battery explosion. Therefore, the lithium ion battery in use to prevent and solve these problems. I charge too high. When lithium ion battery of single battery voltage more than a specified value, resolves the electrolyte in the battery. Electrolyte decomposition can cause the battery temperature, reduce the service life of the battery, the severe decomposition leads to the battery of the gas explosion. Lithium ion battery in use and, therefore, charge must attach great importance to the problems in the process of development, so as not to cause the safety hidden trouble and waste of resources. Rechargeable battery protection facilities should be set up. When more than battery voltage value, setting of protection circuit should be automatically cut off the charging circuit. When the voltage recovery to battery can afford, automatic protection circuit to stop working, the normal charge. Different lithium ion battery is made of different materials, so that they can withstand voltage is not the same protection of household circuit should be placed according to the specific battery materials. In addition, the establishment of protection circuit, should also pay attention to the noise caused by the error of judgment and operation. Set the protection circuit, time delay should be set as the overcharge protection, when the voltage is more than that the battery after a certain time, trigger a protection circuit protection. Second, excessive emissions can also cause problems over discharge of lithium ion battery life shortened. Especially is important to note that the damage of the lithium ion battery discharge is not reversible, once the battery over discharge problems caused by the injury, no measures can make the battery back to health. In order to properly protect lithium ion battery, it is necessary to prevent over discharge, and install the discharge protection device. When lithium ion battery voltage is lower than the discharge voltage monitoring, discharge protection device can automatically work, terminate the battery discharge process. The problem such as over-current, short circuit flow problem is when the discharge current is too large will cause damage to the battery, and the damage is irreversible. Lithium ion battery has certain limits to the discharge current, when the discharge current exceeds the critical value, can affect the service life of batteries. Over-current protection will also need to set a certain amount of time delay, generally at least a few hundred milliseconds microseconds, do this is to avoid the wrong operation in the battery, but the delay time is too long, the influence of the overcurrent protection problem is no effect, also can cause damage to the battery, so the delay time is more accurate. Flow problem is a kind of special performance of short circuit problem, often see such scene in life, when the power plug insert high-power electrical appliances, very prone to type I short circuit, which is caused by a large current discharge damage. Unlike flow problem, short circuit problem in protecting circuit almost have no time to delay. Instead, shall be immediately cut off the circuit in the wake of a short circuit problem, otherwise it will cause serious damage to battery and electric appliance. Four, battery balanced power lithium ion battery sometimes takes a few root, dozens or even hundreds of root cell line, these batteries in use may appear unbalanced situation. This is because the battery production need to go through a lot of procedures, although at the end of the process is very strict test, but after all the various kinds of differences in the process of production, after a period of use, these differences will be starting to show. In this case, if you have a battery pack consists of multiple battery, the battery capacity depends on the capacity of minimum capacity of the battery. This is the barrel theory. In the face of such problems, we should set up the battery, the corresponding line absorb redundant power from high voltage of battery, battery can be more balanced. The balance of commonly used methods, which has two kinds of stored energy equilibrium and resistance equilibrium. 5. Environmental temperature use rechargeable batteries, the influence of environment temperature on the battery life is often ignored by people, the specifications of the pool has indicated the battery temperature range, but in high temperature or low temperature environment, the battery self-discharge rate will be higher, especially the high temperature will greatly reduce the service life of the battery, so before buying, need to communicate with the engineer, the use of the use of a given device or the environment, such ability can let a better performance of the battery. Notebook computer prompts fault: 'please replace the batteries' solution dell Inspiron N4010 notebook to use less than a week, the new machine is master lu detected after opening the battery depletion 9%, 12% after two days into a loss, began to suspect that the battery quality problem. After confirmation, the machine and the battery can be normal use, the battery can use 2 hours or more. After replaced the other testing tools, problems still exist. Solution: the issue has been by dell CIS engineers tested on multiple machines, by slow to charge and discharge can successfully solve the problem of 99%. 18 for a battery wear. 5% of the machine as an example, As shown in figure 1) The machine, after a full battery, when normal use, until the battery to below 10%. When prompted to recharge, restart the computer. Next, don't repeat boot action until bright LCD screen press the power button, and then in the shutdown state will charge full of can. After an operation, reduced to 15 battery wear. 89% ( As shown in figure 2) , many times after the operation, the battery at least reduce the loss to zero. 9%.