Water Detection
Sensor
According to sharp growth of Electrical Vehicles (EV), many OEMs are using cooling systems for their
battery pack systems. However, if an instance of water leakage were to occur in Li-ion battery packs, it
would create dangerous conditions.
Thermometrics Water Detection Sensor detects moisture leakage via a change in resistance value of the
sensor and feeds a signal to the Battery Management System (BMS) to warn the driver.
Applications
• Battery pack water detection
•
Overflow of water/fluid
•
Leak detection from a burst pipe
•
Level detection on tank fill applications
•
Condensate overflow sensor for HVAC
applications
• Sump pumps
Features
• 510kΩ ± 3%
• Operating Temperature Range: -40°C to 85°C
• Easy to install
• RoHS Compliance (Directive 2011/65/EU)
Amphenol
Advanced Sensors
Water Detection Sensor - Specifications
Parameter
Operating Temperature Range
Resistor in Sensor
Rated Power
Pull-up Resistor
RoHS
Limits
Min
-40
494.7
510
5V DC
100
Directive 2011/65/EU
Typ
Max
85
525.3
Unit
°C
kΩ
Voltage
kΩ
Condition
1/4 Watt
Recommended
Recommended
Reliability
Parameter
High Temperature
Dwell/Operation Test
Low Temperature
Dwell/Operation Test
Criteria
After test
- No deformation
- No functional error
- To meet requirement
After test
- No deformation
- No functional error
- To meet requirement
After test
- No visual error
- Deformation allowed at non-
functional area
- No functional error
- To meet requirement
After test
- No functional error
- To meet requirement
During/after test
- No functional error
Condition
- Temp: 85°C ±
3°C, 1000 hrs
- Rated voltage: 5V
- Check water immersion at 5V DC
-
-
-
-
-
-
-
-
-
Temp: -40°C ±
3°C, 1000 hrs
Rated voltage: 5V DC
On: 10 mins, Off: 50 mins
Check water immersion at 5V DC
Temp: 85°C ±
3°C, 1000 hrs
Humidity: 95 ~ 99 % RH
Rated voltage: 5V DC
On: 10 mins, Off: 50 mins
Check water immersion at 5V DC
High Temperature/Humidity Test
(Voltage rated)
Temperature/Humidity Cycle Test
See Figure 1 for test condition.
- Check water immersion at 5V DC
- After the test, dwell specimen at room
temperature more than 2 hrs
See Figure 2
for test condition
(On: 10 min, Off: 50 min)
- After test, dwell specimens at room temp.
(more than 2 hrs)
- Check water immersion at 5V DC
See Figure 3 for test condition.
- Impact acceleration: 392±10% m/s
2
- Impact time: 11 ms
- Impact direction: +X, -X, +Y, -Y, +Z, -Z
- No. of impact: 3 times (each direction)
- Check water immersion at 5V DC
- Drop height: 1m (concrete or steel floor)
- Drop direction: 1st: X, 2nd: -X
1. not applicable to connector direction
2. switch product to cover before drop
- No. of drop: 2 times (per specimen)
- Check water immersion at 5V DC
See Figure 4
for test condition.
- Total duration: 3 cycles
- Check water immersion at 5V DC
Temperature Cycle Test
After test
- To meet requirement
After test
- No visual error
- No functional error
- To meet requirement
After test
- No visual error
- No functional error
(including sealing)
- To meet requirement
After test
- No burning marks
- No functional error
- To meet requirement
Impact Test
Drop Test
Dew Condensation Test
2
Water Detection Sensor - Specifications
Parameter
Dust Dwell Test
(Not power rated)
(Cont.)
Criteria
After test
(remove dust before inspection)
- No functional error
- To meet requirement
-
-
-
-
-
Condition
Unspecified procedure to follow JIS D 0207
Dust type: JIS Z 8901, 9 types, 3 kg
Air pressure: 294 ~ 490 kPa
Dust spray: 10 sec, every 15 mins (total test duration: 6 hrs)
Check water immersion at 5V DC
Temperature Characteristics
Test
After test
- To meet requirement at each
temperature
- Dwell specimens at room temp. for 1 hr (not power rated)
- See Figure 5 for test condition
- Dwell specimens at each temperature
→
Test specimens at
the same temperature
- Rated power: 12.6 V DC
(for water leak operation check)
- Check water immersion at 5V DC
-
-
-
-
-
Salt water density: 5 ± 1 %
Salt water temp.: 35
± 2°C
Test duration: 24 hrs
Water dispensing: mist type (1~2 ml / hr)
Check water immersion at 5V DC
Salt Spray Test
After test
- No functional error
- No rust allowed
(white rust allowed)
- To meet requirement
After test
- Bracket breakage
* customer approval needed
- No visual error
- To meet requirement
After test
- No visual error
- No functional error
- To meet requirement
During/after test
- No functional error
Resonance Durability Test
1. Resonance frequency search
- Frequency: 10 ~ 1000 Hz
- Vibration acceleration: 9.8 m/s
2
- Vibration direction: X, Y, Z
2. Resonance durability test
- See Table 1 for test condition
-
-
-
-
Frequency: 10 ~ 1000 Hz
Acceleration: 20 m/s
2
Duration: 8 hrs (each axis)
For vibration frequency, see Figure 6
Vibration Durability Test 1
- Accelerated vibration at
product (Indoor, trunk, door)
Vibration Durability Test 2
- Accelerated vibration at part
(Indoor, trunk, door)
After test
- No visual error
- To meet requirement
- Bracket breakage
* customer approval needed
During/after test
- No functional error
-
-
-
-
Frequency: 20 ~ 2000 Hz
Acceleration: 60 m/s
2
Duration: 5 mins (each axis)
For vibration frequency, see Figure 7
Vibration Durability Test 3
- Sweep vibration
After test
- No visual error
- To meet requirement
- Bracket breakage
* customer approval needed
During/after test
- No functional error
-
-
-
-
-
Frequency: 10 ~ 200 Hz
Sweep cycle: 15 min (log scale)
No. of sweep cycle: 300 (each axis)
Vibration direction: X, Y, Z
Acceleration for vibration: See Table 2
Vibration Durability Test 4
- Mixed condition
After test
- No visual error
- To meet requirement
During/after test
- No functional error
-
-
-
-
Test duration: 20 hrs (each axis)
Test pattern: See Figure 8.
Temp. & operation condition: See Figure 9
Vibration acceleration: 27.8 m/s
2
Thermal Shock Test
After test
- No solder/part error
- To meet requirement
After test
- No functional error
- To meet requirement
No criteria
(Only functional error above/
below operating temperature is
acceptable)
- Test 1 duration: 500 cycle (Indoor product)
- Test 2 duration: 1000 cycle (engine room, exterior, etc)
- Test pattern: See Fig.10
-
-
-
-
Impact acceleration: 400 m/s
2
Impact time: 11 ms
Number of impacts: See Table 3
Check water immersion at 5V DC
Impact Durability Test
High/Low Temperature Test
(Product limit lifecycle test)
- Place specimens at below temperature for 30 mins and then,
operate for 30 mins [°C]
(-40, -30, +80, +90, +100, +110, +120, +130)
- Check water immersion at 5V DC
3
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