These ready made battery packs are suitable for any application where portable power is required. 12V (4 cell) battery packs have an integral battery management system to balance and monitor the cells during charging. A BMS master unit or battery protector is also required.
Features:
- Marine grade Stainless Steel strapping.
- Cell interconnects and battery management cell modules pre-installed
- Protective polycarbonate cover
- Brass terminal posts
- Suitable for series connection to make higher voltages, 24V, 36V, 48V etc
- Custom made to your requirements up to 360Ah capacity
- Charged, balanced and tested prior to delivery
- Easy installation and trouble free operation
- Designed and assembled in Australia by EV Power Pty Ltd
Applications include:
- Marine House power systems
- Recreational Vehicles and Caravans
- Golf carts and ATVs
- Remote Area power systems
- Portable Lighting towers
- Industrial process control systems
- Electric vehicles
BMS-BCU-EVPPAK-8C - 8 cells / 24VDC
A smart device in a small package this control unit is designed to work with the EV Power Paks to deliver trouble free power for portable power applications. This is the first of a new range of microprocessor controlled master units, now called battery control units.
Features:
- Low power consumption (<15mA) even when discharge contactor is on.
- Monitors battery voltage 12V minimum, 15.1V maximum.
- Monitors the battery management system.
- 120A contactor, 500A optional isolates the battery if there is a problem.
- 12V and 24V versions available.
- Can control battery packs in parallel
Specifications:
| EV POWER PACK 12V MODELS | ||||
| MODEL | Voltage | capacity | len x wid x ht mm | weight |
| EVP12V040A | 13.2V | 40Ah | 185 x 116 x 200 | 6kg |
| EVP12V070A | 13.2V | 70Ah | 240 x 115 x 230 | 9kg |
| EVP12V100A | 13.2V | 100Ah | 287 x 150 x 240 | 13.5kg |
| EVP12V130A | 13.2V | 130Ah | 230 x 185 x 300 | 18kg |
| EVP12V180A | 13.2V | 180Ah | 285 x 185 x 300 | 22.5kg |
This battery is just amazing. I thought you would like this feedback & yes you may quote me if you wish.
Regards, Adrian"
1: Does Temperature effect the total discharge rate? Hot weather vs freezing.
A- The battery voltage will sag more under load in cold conditions but it will still deliver most of its Ah capacity.
2: Is the charging pack and bms water resistant?
A- Yes, we make the 12V battery modules with covers and seal the edge to prevent water/dust ingress. It won’t handle getting rained on directly though so must be inside the cart.
3: A lead acid battery gases while charging, does lithium emit anything?
A- Nothing under normal charging/discharging.
4: What safety concerns do we need to be aware of in the event of a short circuit or heavy impact to the battery pack in the event of a crash or failure?
A- LFP batteries contain an organic electrolyte which is mildly flammable. In the event of a catastrophic short circuit or accident where the batteries are ruptured there is the potential of a fire. A small dry powder fire extinguisher is recommended near the pack.
LFP batteries are much safer in this respect than Lithium Cobalt and Lithium Manganese.
5: Does the BMS control over discharging or is that something we need to build into the cart? Our operators are fairly rough and will drive the carts till they stop.
A- The BMS-MCU-NEV-16S has two protection modes. The first is that it monitors the overall pack voltage and if it goes below the limit (about 90% discharged) for more than 30 seconds the battery will be disconnected. The second is that each cell is monitored so if any cell becomes over-discharged the battery will be disconnected.
An optional bar graph voltage display is available which gives an indication of the battery state of charge similar to the Lead Acid versions.
6: If 70% discharge = 2000 cycles we would not want to discharge any lower than 70%. What lets us know when the batts reach 70% discharge? A- For this a SOC amphour counting type meter is required such as the Xantrex Battery monitor. It can generate an alarm at 70% discharge to warn the operator to limp home. We are also working on our own battery monitor but it is not in production yet.
Q- If we put an alarm system on the cart at 70% the operators will then put on recharge. Is this possible?
A- Yes it is possible but not included in the BMS system. It is an addition.
7: Is lithium recyclable?
A- Yes, all the battery components are valuable and recyclable. In future this will be a big industry.
8: Lead acid batteries sometimes have cells fail. Do Lithium have any failures?
A- Occasionally yes. In my experience about 1 in 5000 cells will fail. In most cases it will be DOA so is easy to pick. Subsequent to installation failures in my experience are due to over-discharge because of installer or operator negligence. That is why we are now supplying the prefabricated 12V EV Power Paks with BMS installed and insist on a BMS master unit being correctly installed. We are moving towards a plug-and-play system which is very robust.
9: What’s the maximum amperage @ 48volts that the Lithium pack can handle?
A- For a 180Ah system it would be 1800A in short bursts or 540A continuous. 145A continuous is recommended for long life. Your carts would not draw anything near this except when accelerating/pulling heavy loads.
10: When the Lithium pack is exhausted can we just replace the battery or do you need to replace the bms and charger as well?
A- Just batteries. I think you will find that once they are installed and run in, if they are not abused by running flat continously they will last a very long time (5-10 years) without any maintenance.
