Function

the Coolant PTCHeater assembly can provide heat for new energy Vehicle battery and meet the criteria for safe defrost and Defogging.

at the same time, it provides heat for other parts of the vehicle that need Temperature regulation.

Features                               

      Electric heating of Antifreeze, heating through the heating core

      Installed in a Water-cooled circulation system

      Soft warm and Temperature control

      PWM adjustment drive IGBT to adjust the power

      Short-term heat Storage

      Vehicle cycle, support Battery thermal management

      Environmental Protection

Electrical performance

Basic parameters

Description	Conditions	Min	Typ	Max	Units
Power	A) Test voltage: Control Voltage: DC24V; Load voltage: 600VDC      b) Ambient temperature: 25C2C; Inlet temperature: 0C; Flow rate: 10L/min      c) Air pressure: 70kPa~106ka		6000		W
Weight	No coolant, no Connection		2.5		kg
Coolant volume			145		mL

 

Temperature:

Description	Conditions	Min	Typ	Max	Units
Storage temperature		-40		125
Working temperature		-30		105
Maximum coolant Temperature	Input Pressure 200kPa	-40		100

Low voltage:

Description	Conditions	Min	Typ	Max	Units
Control voltage		18	24	32	V
Grand			0		V
Supply Current	Steady Current	90	120	160	mA
Starting current				1	A

High Voltage:

Description	Conditions	Min	Typ	Max	Units
Supply voltage	Turn on heating	550	600	750	V
Supply current	Nominal conditions				A
Surge current	Nominal conditions		1.3 times of rated voltage		A
Standby current	Nominal conditions			1.6	mA

High pressure:

Name	High Pressure Safety	Remarks
High-pressure mark	Adhesion warning mark	Material wear-resistant, resistant to Vehicle typical chemicals
Contact protection	1. Meets the requirements for Class II Components 2. Meets IPXXD after assembly
High voltage short circuit Protection	Existence
High voltage overload protection	Existence
High and low voltage electrical Isolation	Coupling isolation	High and low voltage power supplies use Magnetic isolation, optical isolation for control signals
Insulation resistance	50 M	Satisfies more than 500/V
Voltage resistance	No dielectric breakdown or arcing at AC800V for 1 minute	Performance requirements for PTC Wafers
Insulation pressure	AC2500V, 50~60Hz, leakage Current <10mA, 60s, no dielectric breakdown or arc phenomenon	Performance requirements for insulation Protection
IP protection class	IP67

Others:

Description	Conditions	Min	Typ	Max	Units
Humidity		5		95	%
ESD resistance strength		-8KV		+8KV
Pressure loss	Coolant temperature=0,Flow Rate=10L/min		10		kPa
Working pressure			0.25		MPa
Peak pressure 0.5 Mpa during work			0.5		Mpa
Coolant filling allowable negative Pressure				0.4	kPa

 

Control method::

 CAN communication           

1 PWM Soft start

PWM uses 30 seconds from 0 to 100% . this feature Is used to protect high-inrush currents and sudden changes on the high-voltage Bus. Each step is soft-started and there is ripple current in the soft-start Process, and the inrush current is small (<1.3 times of the rated Current).

2 Limiting function

2.1 Temperature limiting

2.1.1 When the outlet temperature reaches 80C, the power will Be gradually reduced to maintain a relatively constant water temperature at the Outlet.

2.1.2 When any IGBT temperature reaches 85C, it will gradually Reduce the power or shut down. When it is lower than 80C, it will resume Working so that the IGBT temperature does not exceed the limit Value.

3. Power limiting

3.1 Soft start power limiting

Each channel power is limited to 1425W during soft Start

3.2 Overcurrent protection

in the heating operation, if the road lasts for more than 2 Times of the rated current for 5s, it is considered overloaded and the road will be shut down and restarted.

4 Protective function:

4.1 High voltage overvoltage and undervoltage Protection

the operating voltage range can be set according to the Customer's requirements. Heaters that are not in the range will not start and Will be turned off. Resetting to the range will restart the soft start to the Current set value.

4.2 IGBT Drive voltage over-voltage Protection

the heater will be completely turned off when the IGBT driving Voltage is not in the range of the set working range, and the Soft start will be resumed to the current setting value after Recovery.

4.3 Low voltage reverse connection Protection

the heater will not work if low voltage are reverse connecting .

4.4 Outlet temperature protection

When the outlet water temperature exceeds 105C for 3 seconds, All heating will turn off immediately.

4.5 Short circuit protection

Any road of PTC short circuit, the road will Immediately close, then repeate testing 5 times, if still short circuit, The road will no longer turn on heating before re-power.

Warning: high pressure does not have the ability to prevent Reverse connection, high pressure reverse connection will lead to direct heating Can not controlled, high voltage reverse connection may lead to PTC damage and Failure to precharge and fail to start and can cause burnout of the precharge resistor of the Whole Vehicle!