What do the T and D stand for on the battery pack/charger terminals?

I was looking at the terminals of the BA2240 battery pack and was wondering what the T and D stood for on the electrical terminals, between the + and - .

James Rogers

100 Points

Posted 6 years ago

6 years ago

Jennifer VandeWater, Community Manager

81,088 Points

Official Response

Hi James, thanks for your question. These terminals are part of the EGO Power+
diagnostic system and are used to communicate information between the battery
and charger.

We have attached a picture for reference in case anyone is interested.

Comment

2014-06-11T21:31:37+00:00

James Rogers

100 Points

I was hoping to compare the EGO battery pack with other batteries on the market of cordless electric tools. I was simply wondering, if I connect a voltmeter and/or ammeter across the + and - terminals of the pack, without connecting anything to the T or D terminals, will the battery still function properly?

2014-06-16T18:10:25+00:00

James Rogers

100 Points

Jennifer, do the T and D ports communicate with my string trimmer? or are they only used to communicate with the charger?

2014-06-16T18:24:15+00:00

Jennifer VandeWater, Community Manager

81,088 Points

Hi James, the ports are used to communicate with the charger only. Thanks for checking!

2019-03-01T17:45:56+00:00

Hasse Nasstrom

80 Points

The T terminal has a 10kohm resistor with negative temp coefficient and will cut off
charger if battery is heeting up. It is connected to the minus terminal.

6 years ago

Dominic49

2,696 Points

to expand on this, generally speaking, T would be for temp, D would be for data. If you want to do some digging on the data side of things TI makes a very popular battery capacity monitoring chip.

http://www.ti.com/lsds/ti/power-management/battery-fuel-gauge-products.page

Comment

2 people like this

1 year ago

Joe Schmoe

120 Points

Does the battery pack on the mower have to have the T connector because I noticed there are 3 metal connectors sticking out but 4 on the battery. T, D, +, & - and my battery is fully charged but not getting power to the mower for some reason. It just stopped working and the T connection looks like it is missing on the mower. I am not receiving headlights, power indicator lights nothing is working on the mower.

Comment

2019-03-10T00:06:40+00:00

Blue Angel, Champion

180,360 Points

There are only three contacts in the newer tools.

2019-11-08T17:10:09+00:00

Byron Wong

60 Points

I hooked up a 52v battery to my blower using the + and - terminals and it runs for about 10 seconds before it cuts out. It seems like the battery communicates to the tool. Is there a way to allow an external battery to run the tool without it cutting out? I'm trying to build my own backpack battery pack.

12 months ago

Stu Summer

70 Points

Is it possible to use the Ego chargers to charge 52v batteries other than Ego? I have several Ego chargers and my other 52v batteries need a charge. I tried to connect just the + and - to the other batteries and then plugged the charger in. The charger LEDs lit up for a moment and then the charger seemed to go deeply asleep. The charger still works fine on the Ego batteries. Thanks.