雖然網路上已經有很多相關資訊，但還是有網友擔心鋰電池在引擎室高溫、車禍碰撞可能會爆炸。 一、先說明這是不負責任開箱分享單元，所有測試僅提供參考。 二、 鋰電池種類很多， 不是所有鋰電池都這麼危險。我用的是磷酸鐵鋰電池。 三、磷酸鐵鋰完全解決了鈷酸鋰和錳酸鋰的安全隱患問題，鈷酸鋰和錳酸鋰在強烈的碰撞下會產生爆炸對消費者的生命安全構成威脅，而磷酸鐵鋰以經過嚴格的安全測試即使在最惡劣的交通事故中也不會產生爆炸。該電池安全性極佳，濫用測試下，不爆炸，不起火，不冒煙。不會因過衝、高溫、短路、撞擊而產生爆炸或燃燒。解決了傳統鋰電池易起火爆炸的安全隱患問題。資料來源："淺談 磷酸鐵鋰電池LiFePO4 Battery 及 電動車電池選購 @ 新素主義 :: 隨意窩 Xuite日誌" m.xuite.net/blog/tommykjc/twblog/115937212 Although there is already a lot of relevant information on the Internet, some netizens are still worried that the lithium battery may explode in the engine room and the high temperature in the car accident. 1. First, explain that this is an irresponsible unboxing sharing unit, all tests are for reference only. 2. There are many types of lithium batteries, not all lithium batteries are so dangerous. I use a lithium iron phosphate battery. 3. Lithium iron phosphate completely solves the safety hazards of lithium cobalt oxide and lithium manganese oxide. Lithium cobalt oxide and lithium manganese oxide will explode in a strong collision and pose a threat to consumers’ lives. Strict safety tests will not produce explosions even in the worst traffic accidents. The battery has excellent safety and will not explode, fire or emit smoke under abuse test. Will not explode or burn due to overshoot, high temperature, short circuit, or impact. It solves the potential safety hazards that traditional lithium batteries are prone to fire and explosion.
1st when the BMS cut off, the car will not stall, because the alternator will supply all current/voltage to the car. Also when the car start to run, there will hardly any current draw from the batteryr. I suggest you add a super capacitor to stabilise the alternator voltage when the BMS cut/disconnect the battery. Also add a TVS diode to the alternator to protect the alternator rectifier for current surge appear when the battery is cutting off by the BMS due to induction (back emf). Good Luck
@@taiwango2020 Hi, by right your BMS should cut off. When your car is running, the charging current from alternator is from 50 amp to 100amp plus, something can go as high as 150amp, so your battery will be full in no time. Also once the car started, the car will draw current from the alternator, instead of the battery. If your BMS did not cut off and keep charging, that mean your Lifepo4 battery is alway at 99% to 100% full and it is not healthy for lifepo4 always stay at fully charged state. I set my BMS to cut off charging voltage at 13.9v ( so when the BMS cut off, the battery voltage is read around near to13.4V which is around 90% full ), and I only start recharge when battery voltage fall below 13.1V ( battery around 50%). So my battery will fluctuating between 90% to 50%. If your battery is alway stay at 99% full, Your duty cycle will greatly and surly reduce. I am not sure what BMS you use. I am using one that can view live data with XiaoXiang App. The reason I am using lifepo4 battery as a starter battery, it is because I has 3 car cams running 24/7 when parking.
@@taiwango2020 This is the problem, lifepo4 is a current hurry beast, if you don't set cut off voltage for the battery, it will keep drawing high current form the alternator, it may overheat your alternator rectifiers and cause it to burn out. Also it is no good to keep the lifepo4 in 100% charge for long period. Here the link ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-jgoIocPgOug.html. Lastly, if you going to use Lifepo4 battery as starter battery, get a BMS with Bluetooth function with live data so you can set and tweak the settings.
