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PTC coolant heater 3kw
    Publish time 2020-11-04 09:38    

PTC coolant heater can provide heat for driving cabin of electric vehicle and also provide heat for other space, e.g. batteries.

1.1.2 features

   Using electricity to heat coolant and PTC heater to generate heat.

   Installed in water cooling system

   Soft wind and controllable temperature

    Use PWM to control driving and with IGBT to adjust power

   With short-period heat storage function

   Whole vehicle circulation, supporting battery thermal management

   environmental

1.   basic electrical performance

2.1 basic electrical parameters

item

condition

Min

typical

Max

Unit

power

a)test voltagecontrol voltageDC12Vloaded voltage350VDC

b)ambient temperature20±2inlet temp0±2flow rate10L/min

c)air pressure70kPa~106ka

3000

W

Weight

Without coolant and wires

2.1

KG

Coolant volume

mL

2.2 temperature

item

condition

Min

Typical

Max

Unit

Storage temp

-40

105

Working ambient temp

-40

105

humidity

5%

95%

RH


2.3 Low voltage

item

condition

Min

Typical

Max

Unit

Control voltage VCC

9

12

16

lead

0

current

Steady state

90

120

160

Start current

1

2.4 High voltage

item

condition

Min

Typical

Max

Unit

voltage

heating

350

V

Current

Nominal

8.6

A

Inrush

nominal

11.2

A

Standby

nominal

1.6

mA

2.5 High voltage safety

1

High voltage warning label

Available

2

Fire retardant plastic shell

Available

3

Insulation of HV parts

Available

4

Lead wires

Available

5

insulation resistance>50MΩ

Available

6

Passive discharge

Available

7

HV interlock

Available

8

HV terminals IPXXB protection

Available

9

IP67 protection

Available

10

2U+1000Vbreakdown voltage test

Available

11

HV over voltage shutoff

Available

12

PTC over-temp protection

Available

13

PCB over-temp protection

Available

14

IGBT over-temp protection

Available

15

PTC over current protection

Available

16

PTC short circuit protection

Available

17

IGBT brakdown feedback

Available

18

PTC temperature sensor barrier test and shut off heating

Available

19

IGBT temperature sensor barrier test and shut off heating

Available

20

PCB temperature sensor barrier test and shut off heating

Available

21

Even if IGBT fails, PTC self-limiting temperature will not exceed 200+

Available

22

HV anti-reverse connection

Available

23

HV reverse connecting feedbackreverse connecting may cause uncontrolled heating and damage PTC coolant heater

Available

24

Self-exam when power on.

Available

25

When communication is interrupted, heating will stop

Available

26

High voltage acquires real-time feedback

Available

 control method

3.1 air conditioning control fame

    input command on air conditioning panel

transfer with CAN communication or ON/OFF PWM to controller

    once coolant heater gets with command signal, it will start PTC heater with PWM at input power

Advantage:

    2circuits of PWM controlsmall inrush current

    PWM control method can control power constantly.

    CAN communication can show status of heater which is convenient to monitor.