Some Suggestions about lithium battery assembly

Source: 2020 - 04 - Hits: 01 struck several Suggestions of lithium battery assembly DIY lithium battery recently, several Suggestions, many young white consult to learn DIY lithium-ion battery pack, refit for electric toys, electric cars, etc. The use of the battery pack. In the process of communication, a lot of friends are a little too optimistic, lithium battery technology is not very thorough and rigorous. The author here to sort out the following problem, for your reference. One is the battery choice question 1. Lithium iron phosphate is 3. 2 v, ternary lithium 3. 7 v, this is a simple distinction. 2, the battery can be divided into multiple levels, the capacity, power type. The difference is involved in the discharge rate. In theory, the higher the discharge rate, the better, but the power battery is divided into high, medium and low. 3, look from the operation, small white people buy retail, is to buy a good battery. Good priority to supply the electric car batteries, select talent into the store, shopping mall to choose, good battery pack, bad into the retail market. Note: whether the brand, into the retail market is not too good, even a glimmer of brand is no exception. Of course, you pay insurance cost is higher, the better the deal. 4, battery selection problem, after getting hold of battery, how to distinguish between good and bad. Must use the internal resistance tester, electrical experiment was carried out. The number of MH is the name of the test, how many MH is the actual test. The farther away from the nominal parameter, the worse quality. The smaller the resistance, the better the results. Traditionally, it is lower than 50. More than 50 might be old batteries, bad battery. 5. Cycle life. This is very important. Many friends get together, capacity is not up to standard, use for a period of time is clearly without electricity. The main problem is battery, retail customers are hard to get around this pit, because without a good product, also did not check the quality of battery equipment. ( The author introduces his own electric vehicle battery pack, more than 2000 times cycle) Second, the battery processing problems when we get the cells does not mean that we can deal with it immediately. Would apply to its further processing. ( The battery) Battery assembly must be equipped with necessary maintenance board! Battery requirements in line with the common, the common the better the more stable. If the match is not common, there will be not enough capacity, serious will cause the failure of battery maintenance plate test, the battery does not work. How to? 1, if there are conditions, to choose the machine, there is no machine with internal resistance tester 1 1 1 test, voltage, resistance, capacitance, the static period ( 7 ~ 15 days) , quiet a while, and then test, if you still common, can be processed. This is also to determine the cell on the stability of physical methods. Many friends would say, why bother, cannot be directly assembled and used? Of course, it can be used directly, but in the case of mismatch, the battery pack will be in line with the barrel theory, minimum plate has a capacity of upper limit. The battery pack in the worst of the battery is the limit, the battery capacity drop 10 - 40%. Seriously, a bad battery of battery pack will cause the battery will not work. Check the repair work is more trouble. ( This is a small series of personal experience, the basic one battery lead to the entire battery pack out of date, after all, the process of repair the battery pack is to do, and trouble) Three, battery spot welding problem 1, battery pack processing and assembly priority to machine, manual assembly is not recommended. ( Multiple sets of battery power pack, don't need a single set of combination) 2. Why don't you introduce manual welding? Nickel battery spot welding force control is bad, the battery leakage, unstable virtual resistance spot welding. Hand soldering iron welding, soldering temperature is too high will hurt poles, soldering temperature is too low. ( Most of the household articles for use for the hot welding) 3, lines as thick as possible. Nickel is thicker, the better. 3, battery charging and discharging containers, energy conversion will release heat, non-standard processing problems may lead to battery, the battery pack processing must be cautious, many in the industry a lot of losses, no battery factory was on fire.