Let's first talk about your battery's protection circuit. We usually call it PCB (Protection Circuitry Board). Some people also call it PCM. It usually features: overcharge protection, overdischarge protection, short circuit protection, and overcurrent protection. ., Mobile phone batteries are closely related to human safety, so mobile phone batteries generally have double protection. If there is no protection circuit, lithium batteries are quite dangerous.
Overcharge here means that the battery voltage has reached the upper limit of the battery charging voltage of 4.2V. The protection board is usually set like this. For example, the detection point of overload protection is 4.25V. The detection delay time is 200 microseconds, reachingConditionally, the battery will be protected and cannot be discharged. Then, if you want to recharge it, you have to discharge it, or wait a while and the voltage will drop to some extent. For example, when it goes down to 4V, the charging protection will be released, so you can continue charging.
So the problem you're worried about doesn't exist at all, unless the bumper plate is broken or there's no bumper plate at all, in which case the battery will swell, leak and explode. Battery manufacturers won't do this.
In addition, the charging mode of the lithium battery is CC/CV (constant current/constant voltage). It is first charged with cross current, and when it reaches a certain voltage detection point, it switches immediately. to a constant voltage charge (4.2 V). At this time, the current will become smaller and smaller. When the current reaches a certain value, the charger LED indicator will turn green and battery charging is complete.
So if you just plug in the charger and charge it overnight, there's no point because it's been protected. Unless the battery discharges very heavily, the battery voltage will drop back to the normal value. low level after a short time, and the protection will be released, the protection board will allow the charger to charge.
What are the main production processes of lithium battery cells?
A battery rupture means that the pole piece inside the battery is broken, which can usually be detected with an ammeter. A common 12V car battery is made up of 3 or 6 cells connected in series internally. series. The operating voltage of each cell in the network is 2V, and the three cells connected in series are 4V. If the operating voltage is not enoughnte, it means that the network is broken. How to repair a broken battery? Let's take a look below.
Results of battery breakage
1. The quality of the battery is not very good
2. Incorrect application method causes failure due to internal battery short circuit; ;
3. Use the battery frequently;
4. Strong impact or drop
Broken battery repair
A broken battery can; be repaired by If a problem occurs, remove the single compartment to replace it. After replacement, seal it with putty. After soldering the connection terminals, add lithium battery electrolyte and charge finally. Qualified people can repair it themselves, but try going to a repair shop to find a professional to repair it.
The battery is a very important component in the car, but it is a consumable component. The DAverage battery life is about 2-3 years. Proper use can effectively extend the battery life. When the car stalls, do not use the electronic products in the car for a long time, and it is recommended not to turn on the air conditioning and headlights, as this will shorten the battery life.
Also, if the car needs to be left for a long time, it is best to cut off the negative voltage of the battery, which can also prevent the battery from discharging. If the battery is discharged for a long time, the battery life will be shortened. It's best to run the car about once a week to keep the generator running on standby. This can also charge the battery to ensure this. the electricity consumption battery.
What type of epoxy board is used in lithium batteries
Mixinge (positive and negative active materials + conductive agent + binder + dispersant) - coating --- --Lamination-- -----Slitting-----Tab welding--Rolling (or joint)--Adhesive paper ---Inserted into the battery shell--Welding--Sealing---forming, etc. Basically, the battery production process throughout the industry is similar. The main difference lies in the difference in equipment or different battery products, such as soft packs, general lamination, cylindrical winding, square winding and lamination coexist, resulting in battery cells different in the winding process; the most important and fundamental technology is mixing and coating, as well as final forming;
To make lithium batteries, just use a two-millimeter epoxy plate.
Since the cells of the lithium battery shave closely arranged and large numbers, and each string is connected by a cable and a protective board, the insulation work is particularly important. In principle, all exposed conductors should be covered with Highland barley paper for insulation. The bottom part of the distributed cables cannot be in direct contact with the battery core or nickel foil and must be insulated with highland barley paper or EVA foam. not to be distributed in areas subject to extrusion and friction.
When two groups of batteries overlap, an epoxy board or silicone board should be used to separate them. When installing the protection board, the lower part must be insulated and fixed with an epoxy board. Stick EVA foam to the gaps and around the battery for an impact-resistant treatment. Once the battery is organized, it is sealed with an epoxy board tor shape it. After being firmly attached, use PVC heat shrink film for waterproofing and sealing. with organic silicone on both ends.