Some guys are interested in this new kind of charger, so I'd like to give a brief introduction of this charger. If you have any question, just leave me a message.
1. Several models of charger available
We have researched a new kind of balanced charger ,which can balanced every single cell when charging thus fully guarantee the whole packs super long life time ..And we have built the BMS into the charger .Now we have the following several models of charger:
36V 2A /4AMP, 36V 25A, 48V 8A/25AMP, 72V 25A.
2. Why we say our fantastic new charger with balancing function and with BMS board insider the charger is a revolution and it is a new invention ?
How does the balanced charger with BMS and balancing function inside manage to balance every single cell?
This kind of charger is the most advanced in the world.So many producer has invested so large account of money but failed to designed well the kind of sophisticated charger with BMS and balancing function inside . Suppose the theotical battery life is 2000 times, if not use the balancing charger, the real cycle life might be only 800 times or even less.
Because among the whole pack, there should be always the weakest cell who had been charged into the highest voltage and discharged into the lowest voltage at first. Thus finally, these weakest battery would be deteriorated firstly. So even other cells still have 90% good performance, while this whole pack decay just because of one bad cell . , and Things is so serious . That means , 70% battery + 30% balancing charger = 100 % good performance.
Our balancing chargers main function is to charge each single cell seperately , guarantee the similar voltage of every single cell , thus every single cell have the longest life as forcasted by therotically .
When there is one single cell who reaches charge cut-off voltage ( 3.9V) but other cells hasn’t, we manage to prevent this certain batteries voltage from keeping on increasing and let other cells to be charged as usual.
For example , if the charging current is 5A , when any single cell reaching the cut-off voltage , the charger will discharge this certain cell at the current of 3A,so in fact the charging current of this single cell is only 2A after reaching the cut-off voltage, but other cells would be charged by 5Amp as usual .
China has many lithium producer , but only one company had designed well the balancing charger for LIFEPO4 battery ---that is CHINA HIPOWER.
we design the charger which has also been used into the spaceflight industrial
Such charger would 100% guarantee a long life of the battery
3. Why BMS should put inside the balancing charger ?
2) About the BMS ,as we once talked ,before we have the separate BMS attached onto the battery pack and the functions of BMS goes as follows : over-charge voltage protection , over-discharge voltage protection , over –current protection and balancing function etc But as time went by ,we came to conclusion as follows :
As the separate BMS monitor every single cell when charging and discharging .
So when charging , there must be a single cell which reach the cut-off voltage first and then the BMS will stop the charger from the charging the battery ,but at this time ,some other battery hasn’t reached the cut-off voltage ,so the whole pack hasn’t been fully charged in fact .
When discharging , there will be a single cell who reached the discharge cu-off voltage first and the BMS will stop the battery pack from discharging with some other single cells having not reached the cut-off voltage . Again , the pack hasn’t been fully discharged .
The battery can’t be charged and discharged fully time and time again .As the cycle goes by,you will see the capacity of the whole battery pack will decrease little by little and even promptly .
Another point is that, with the separate BMS on the battery pack , it will be endothermic and cause more heat and affect the overall performance of the pack accordingly .
Because of the above situations , we have successfully researched a new kind of charger --- new balanced charger ,which can balance every single cell when charging .
When charging , if one single cell reached the cut-off voltage first , other single cells will go on to be charged and the one who reaches the cut-off will be discharged at the same time .In this way , the balancing function is realized and the battery pack can be charged fully .
After balancing charging ,the consistency of every single cell is very good , SO When discharging ,the single cells with the most similarity will guarantee the consistent discharging . Even there is some difference , they will be balanced when charging next time .That is also the main advantage of our new balanced charger .
Accordingly, every time every single cell can be charged and discharged to the same level and can be charged and discharged fully . So the
Capacity of the whole pack can be guaranteed and won’t decrease because of the difference of the single cell .Also ,the performance of super longevity of our battery can be improved accordingly .
In addition, every e-vehicle has its own controller ,which can play as part of the BMS . It would protect and prevent the battery pack to be over-discharged and over –current .
So the BMS over-discharge function can be acted by the controller. An additional extra over-discharge function in BMS would double the cost and increase the weight .
So it seems unneccessary to put extra BMS into the battery if our charger already has put inside the BMS and the controller can protect the over charge .
4. The led’s on the new balanced charger:
36V Balancing Charger
The balancing charger of 36V has 14 LED lights including one power light, one charge light and 12 LED each of which matches one single cell ( as the 36V battery pack need 12 pieces of single cells assembled).
When the battery cell in the situation of balancing then the corresponding light will turn red which also marked that the voltage of the battery cell has already arrived the voltage we set(usually we set the voltage at 3.7 voltage ).For example, during the charging time ,when the battery cell one arrives 3.7 voltage while other single cells are under 3.7 voltage ,then there will be only the light one turn red and at the same time the corresponding balancing line will work .When the voltage of the battery one is under 3.7 voltage then the light one will be turned off and the corresponding balancing line will shut.
When all the 12 lights (LED1----LED12) matching with the 12 single cells are all turned off, it indicates that the all the batteries are full and at this time the charge light will turn into green.
Note : when the charge light turned into green , the LED1---LED12 maybe not all turned off as some battery cells of the battery pack still on the balancing situation but the whole battery pack have already accomplish the charge process.
48V Balancing Charger
The balancing charger of 48V has 16 LED lights include one power light one charge light and 16 LED each of which matches one single cell ( as the 48V battery pack need 16 pieces of single cells assembled).
When the battery cell in the situation of balancing then the corresponding light will be turn red which also marked that the voltage of the battery cell has already arrived the voltage we set(usually we set the voltage at 3.7 voltage ).For example, during the charging time ,when the battery cell one arrived 3.7 voltage while other battery cells under 3.7 voltage then there will be only the light one turn red and at the same time the corresponding balancing line will work .When the voltage of the battery one under 3.7 voltage then the light one will be turned off and the corresponding balancing line will shut.
When all the 16 lights(LED1----LED16) matching with the 16 single cells are all turned off ,it indicates that the all the batteries are full and at this time the charge light will turned into green .
Note : when the charge light turned into green , the LED1---LED16 maybe not all turned off as some single cells in the battery pack are still in the balancing situation but the whole battery pack have already accomplish the charge process.