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 5 years ago

5 years ago

Jennifer VandeWater, Community Manager

81,048 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

81,048 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.

5 years ago

Dominic49

2,676 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

9 months 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

179,968 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.

6 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.