Sunkko 797DH User manual

Model: 797DH
Thank you for choosing Sunkko 797DH battery spot welder, let's now make the building
of Lithium battery pack for our projects more convenient and efficient.
Manual

Summary
Sunkko 797DH is designed for people working in battery spot welding
business. It has a great improvement in LCD display and design compared
with sunkko 709 series.
It is specifically designed for battery welding (18650, 14500 and any other
lithium batteries, etc) and can be used to weld nickel strips with thickness
between 0.05 and 0.3 mm for nickel plated steel or between 0.05 and 0.25
mm for pure nickel strip.
LCD DISPLAY: The current level and pulse can be easily set. On the basis of
sunkko 709 series LCD, we added an extra part to show the dynamic welding
current and pulse quantity during the welding process. The value at the lower
left corner stands for the dynamic welding current, 0.1 equals to 100 amps.
The value at the lower right corner is the dynamic pulse quantity. The right
pulse quantity will be displayed after the first welding when you adjust the
pulse buttons.
MOBILE WELDING PEN: Sunkko 797DH gives users more possibilities at
work, 797DH can be compatible with 3 types(71A, 71B, 70B) of mobile
welding pen, and with our professional spot welding table, making your
battery spot welding and diy process more smooth and efficient.

797DH can also be used with our professional welding desks.

COOLING FAN: 797DH is also equipped with a temperature sensor and a
cooling fan, when the inner temperature gets higher than a certain value, the
cooling fan will work automatically.
Two ways of welding:
Fixed welding head with foot pedal: You can build your battery pack with the
fixed welding head and foot pedal. Coordinating hands and feet at the same time
will make the long-term welding process not so tiring, plus the use of foot pedal
during battery welding improves the precision of spot welding.
Welding range: 0.05~0.3mm for nickel plated steel, 0.05~0.25mm for pure nickel
strip;
Preparation steps:
1. Fit the fixed welding head with copper welding rods before the machine
powers on.
2. Plug in foot pedal.
3. Turn on the power switch.
4. Adjust the pulse quantity and welding current level to make the spots
more reliable and elegant.
5. Weld your batteries with fixed welding head along with the foot pedal.
Mobile welding pen with foot pedal: The mobile welding pen effectively extends
your welding area, and this design is popular among electric hobbyist, because
they can build large lithium battery packs for their e-bikes or other projects.
Welding range: 0.05~0.2mm for nickel plated steel, 0.05~0.15mm for pure nickel
strip;
Preparation steps:
1. Insert mobile welding pen.
2. Plug in foot pedal.
3. Turn on the main power switch.
4. Weld your batteries with mobile welding pen along with the foot pedal.
(Attention:
In all the steps mentioned above, please make sure that the copper welding rods of
the fixed head and the welding pins of the mobile welding pen are not in contact with
each other to avoid short circuit.
When users need to adjust the distance between welding pins on mobile welding pen
or distance between copper welding rods of fixed head, please turn off the welder first,
do not adjust the distance when the welder is on.
Welding with fixed welding head only is not supported.)
In general, there are three ways to increase the power output: You can adjust
the welding current, welding pulses or the cluster pulse knob to increase the
power output if you are welding a thicker nickel sheet. You may need to play
with them a bit to get the best combination for your specific use.

(Attention: This spot welder can be used to weld pure nickel, nickel plated
steel, nickel plated iron, iron and other alloys. It CANNOT weld metal like
copper and aluminum.)
Specification for welding part:
Input voltage: AC 110 V/220 V±10%
Welding current: 50 ~ 800 A
Single pulse time: 5ms
Max. pulse quantity: 18
Max. power output: 3.2 KW (instantaneous)
Fixed welding part:
Welding thickness for nickel plated steel: 0.05 ~ 0.3 mm
Welding thickness for pure nickel: 0.05 ~ 0.25 mm
Mobile welding part:
Welding thickness for nickel plated steel: 0.05 ~ 0.2 mm
Welding thickness for pure nickel: 0.05 ~ 0.15 mm
Specification for mobile welding pen(70B):
Welding needle distance (adjustable): 2 - 7 mm
Total length: approx. 22.4"
Cable cross sectional area: 16mm2
Dimension of welding pins: 1.5x7mm
Others
Product dimension: 14x25x20cm
Item weight: 7kg
Packing List:
797DH main machine: 1 pc
mobile welding pen(3 options): 1pc
Copper welding rods: 2 pairs
Copper welding pins for mobile pen: 1 pair
Battery fixture: 1 pc
Foot Pedal: 1 pc
Fuse: 2 pcs
Hexagon wrench: 1 pc
0.15 x 8 x 100 mm (nickel plated) 50 pcs
0.1 x 4 x 100 mm (nickel plated) 50 pcs
Manual: 1pc

Notice
1. When building battery pack with Sunkko welders, if the home circuit system keeps
tripping, please replace your Circuit Air Breaker. For 110V version machine, the Circuit
Air Breaker in your circuit system should be higher than 40 A. For 220V version
machine, the Circuit Air Breaker in your circuit system should be higher than 30 A.
2. Please put on gloves and mask during your battery pack welding process to protect
yourself(Sparks may occur during welding process).
3. Unplug the welder when you are not using the welder.
4. During your welding process, the instantaneous large current generated by the welder
may cause the lighting equipment under the same power system flash and it is
considered normal.
5. Do not short circuits during spot welding or charging.
6. Do not use Sunkko welders with a voltage transformer as Sunkko welders are not
compatible with the common voltage transformers in the market.
7. Continuously spot weld too fast will speed up the loss of internal components of the
spot welder. We recommend that the time between each spot welding should be 3
seconds or longer.
Warranty information
1. What is covered?
This limited warranty covers defects in main machine.
2. What is not covered?
The warranty does not cover any damage caused by the owner modifying,
attempting to fix, or otherwise altering the machine.
The consumable accessories are not in coverage, such as welding pen,
cooper rods and nickel strips.
3. How long does this coverage last?
The warranty lasts one year since the date of original purchase of the product.
4. Who is covered?
This limited warranty covers only the original purchaser of the product on
sunkko.net. If you need warranty service, please contact us at
serv[email protected]et directly and provide us your order ID.
If you still have questions on sunkko products, please go to the blog category
on https://www.sunkko.net/ or email serv[email protected]et. We are happy to
assist you.