PWMWAVE B-21 User manual

PWMWAVE Balance Charger
User's Manual

Balance Charger/Discharger/DC Power X37B
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Thank you for using pwmwave series intelligent battery charger. At present, the
series of products include B-21、B-52、C130、X37b. Please read this manual carefully
before use, so that you can better use the product.
◆ Special Features:
☆ Multi functional intelligent charger can realize multi-function for a variety of batteries:
Lithium polymer battery: balanced charge / balance port discharge / external discharge / recovery
discharge / storage / balanced charge / cycle charge and discharge;
NiCd / NiMH battery supply mode: automatic charge, manual charge, discharge, cycle charge and
discharge; lead acid battery supply mode: charge and discharge. With the discharge device of
PWMWAVE, the discharge function of 150W can be realized.
☆ High power, high current, high efficiency, high precision (current accuracy 0.001a, voltage
0.001V), the maximum charging current is 30A; the maximum recovery discharge current is 30A.
Provide external resistance discharge. Perfect power control method ensures system safety.
☆ A wide range of input voltage of 9-40v allows users to provide 12V power supply and 24V
power supply and a variety of battery power supply schemes. The maximum power is 750W
☆ With the function of software upgrade, users can upgrade the charger software through the
upgrade port of PC.
☆ A Help file is provided in each important function menu to explain the use method, so as to
avoid the trouble of finding the manual and asking for help. The purpose of pwmwave is to think
for the user.
◆X37b parameter index:

Balance Charger/Discharger/DC Power X37B
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1、Input voltage range: 9-40vdc
2、Maximum charging / discharging DC power supply current: 30A
3、Maximum charging power: 750W
4、Maximum discharge power: internal 40W / 750W (external discharge and recovery discharge)
5、Maximum balance current / number of battery strings: 2.0a/6s
6、Battery type: LIVH, lipo, Lilo, life, LTO, NiZn, NiMH, NiCd, Pb
7、Equipment appearance size: 97.5 × 64.5 × 40 ± 0.5mm
8、Equipment weight: 250g (host)
◆Attention:
☆ In order to ensure safety, charging and discharging must be carried out within the sight
range. If you need to leave, take out the battery to avoid unexpected danger.
☆ Make sure that the battery type and the string number of the battery pack are
selected correctly. If the selection is wrong, it may not only damage the battery,
but also cause danger (especially if the lithium battery cannot be overcharged,
the battery may cause fire).
☆ Do not mix batteries of different types, capacities and manufacturers.
☆ Do not modify or disassemble the charger.

Balance Charger/Discharger/DC Power X37B
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◆Interface Description:
（1）LCD
（2）NULL
（3）USB
（4）POWER INPUT
（5）UPGRADE
（6）BALANCE PORT
（7）OUTPUT PORT
（8）KEY
（9）FAN
（10）BRACKET
◆ Accessories：
（1）Two xt60pw lines
(2) One CD of instruction manual
（3）USB download line.

Balance Charger/Discharger/DC Power X37B
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◆ Boot interface：
1、The man-machine operation interface of the charger is the toggle button on the top right
corner of the charger. The key has the following operation modes:
There are four functions: dial up, dial down, middle short press, medium key long press.Short
press in the middle is to select the battery type or enter the last operation interface, and long
press in the middle is to stop the current function.
2、Boot interface:
A、If it is the first time to start, please set the input power type and parameters according to
the power specification of the input terminal connected by the user.
B、If the user has set the power input parameters, he can choose to continue and ignore the
settings.
C、Power settings are very important when starting. Please confirm carefully that for most
functions, improper power settings can cause the machine to burn down.
D、The middle part is the system temperature, and the large characters at the right end are:
output port voltage, current current current, charging and discharging capacity, and current
power, while the small character part is the input power supply voltage and current. The
contents below are battery voltage, total battery voltage, maximum voltage difference and
internal resistance.
3、Default voltage value:
Model: B-52
H Ver: 1.0
S Ver: 1.0
SN: 20090522
HELP
Input Power select
Continue

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◆Home page：
In the figure above are: charger status, time, temperature, output voltage, output current,
capacity, power.
The small font in the middle is input voltage and current.The following figure shows the voltage
of each battery, the sum of each battery voltage and the maximum and minimum voltage
difference.When you dial the key on the main interface, you can see the internal resistance
display. If you press the key again, the system will enter the battery selection interface.Dial the
key on the main interface to enter the system setting interface and auxiliary function interface.
◆ Battery selection page：
LiPo
锂聚合物
Lilo
锂离子
LiFe
磷酸铁锂
NiCd
镍镉
NiMH
镍氢
PB
铅酸电池
Nominal voltage/CELL
3.7V 3.6V 3.3V 1.2V 1.2V 2.0V
Maximum limit voltage 4.2V 4.1V 3.6V 1.6V 1.6V 2.45V
Fast charging current <1C <1C <4C <1-2C <1-2C <0.4C
Discharge voltage/CELL >3.0V/节 >2.5V/节 >2.0V/节 >0.85V >1V >1.75V/节

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The page provides options for four kinds of lithium batteries. Each lithium battery provides 2-4
parameter settings, which can be modified and saved. The settings for NIMH and Pb batteries can
be found on the next page. After selecting the battery through the up and down keys, press the
confirm key directly to enter the function interface of the battery. Two to four parameters are used
to save different battery settings.
◆Battery function selection page：
This page lists six function options. It can be selected by pressing the key.
1、LiPo charging interface:

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（1） Battery Select【AUTO, 1S-6S be selected】
（2） Current【0.1A-30A be selected，0.1A Step】
（3） Charging accuracy (the difference between the minimum battery voltage and the
target voltage at the end, the higher the accuracy, the longer the charging time)
（4） Charging target voltage [4.20v-4.35v optional, step 0.005v]
（5） Balance Config:
i. Balance accuracy [ 5mv、10mv、20mv]
ii. Balance start time【always、CV-0.1、CV-0.2】
iii. Balance overcharging (offsets the drop in battery stop charging voltage)
[5-20mv]
iv. Enable or Disable CHARGEING without balance PORT
2、LiPo --Discharge Description
（1） Numbers of battery [AUTO, 1S-6S optional]

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（2） Target voltage [3.85V-4.1V]
（3） Single section overdischarge voltage setting (to prevent voltage rebound) [5, 10,
20 mv]
（4） Discharge mode settings
I. Internal Balance Port Discharge (2A Discharge, with Balance function)
II. Discharge with external resistance (Internal 30W discharge can also be achieved
without external resistance)
III. Recharge and Discharge (power needs to be set to battery mode at the power
setting locationwhile enabling recharge function)
（5） External discharge settings (only when external discharge is used)
I. Current value of external discharge [0.1-30A]
II. Internal power consumption allowed by the charger (no adjustment required)
III. End current value at recharge (no adjustment required)
IV. Allow unbalanced port battery discharge.
V. Additional features, not used.

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3、LiPo --Storge Description
（1） Numbers of battery [AUTO, 1S-6S optional]
（2） Target voltage [3.85V-4.1V]
（3） Voltage accuracy
（4） Current during charging [Discharge is a balanced terminal discharge, not be set,
current value set during charging]
4、LiPo --CYCLE Interface Description