BLD_CLIP

## **Hydrogen and Battery Leakage Detection Sensor** 

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SGX-BLD1<br>**----- End of picture text -----**<br>


## Datasheet 

**SGX-BLD1** is a Hydrogen Leak Detection sensor, designed for automotive and industrial aplicatione and offers a CAN Output communication. The sensor has to be placed near the Hydrogen system or in the battery enclosure allowing to sense H2 gas during a leakage or Li-ion battery failure mode. 

The SGX-BLD1 solution will allow the Battery or Hydrogen Management System to monitor the safe operation of the system and provides an output signal when a leakage occurs. 

_Quality, Safety, Responsibility_ 

SGX Europe Sp. z o.o. Konduktorska 42 St., 40-155 Katowice, Poland 

T: +48 (0) 32 438 4778 E: sales.is@sgxsensortech.com www.sgxsensortech.com 

## **Functional specifications** 

## **Features** 

- Fast response time (< 1 s) 

- Thermal conductivity gas sensor (high reliability technology) 

- Low power consumption (65mA) 

- CAN 500kbps High Speed communication 

- Watertight housing IP6K7 

- Configurable ID 

- CAN Wake Up 

## **Principle** 

There are different failure modes possible in the hydrogen fuel-cell or li-ion battery system. To prevent a dangerous situation for passengers, the Fuel-cell or Battery management system should send an alarm to the passengers to leave. 

Inside Li-ion battery packs, our sensors can robustly and early detect the hydrogen gas during various failure modes of a thermal runaway event. Other sensing technologies, like pressure measurements, often only detect some of these failure modes and will not work well in all battery pack architectures as venting solutions can prevent a pressure increase detection. 

See below some failure mode examples with a comparison between H2 SGX sensor and a pressure sensor: 

## Cell Overcharge: 

- The H2 sensor (green curve) is reacting 10 seconds faster than the pressure sensor 

- Small pressure increase in short period (gray curve) and similar to environment change 

## Cell Re-Overcharge: 

- The H2 sensor is reacting (green curve). 

- The pressure sensor **is not reacting** (gray curve). 

## Cell Nail penetration: 

- The H2 sensor is reacting (green curve) faster than the pressure sensor (gray curve). 

- Small pressure increase in short period (gray curve) and similar to environment change. 

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SGX Europe Sp. z o.o. Konduktorska 42 St., 40-155 Katowice, Poland 

T: +48 (0) 32 438 4778 E: sales.is@sgxsensortech.com www.sgxsensortech.com 

|Temperature and humidity range|0~95% RH<br>-40°C to +85°C|
|---|---|
|Temperature storage|-40°C to +85°C|
|IP level|IP6K7|
|Fixing|Bayonet<br>Delphi clip (optional)|
|Connector|4 pins Tyco Electronics<br>AMP-1-0967640-1 coding A|
|External dimensions|39mm x 35mm x 27 mm|
|Weight|< 15 g|
|Power supply operating range|9 to 16V|
|Current consumption<br>(Average)|< 65 mA, @12V|
|Output signal|CAN 500kbps High Speed|
|H2 Concentration range|0-4 vol.%|
|Accuracy|1.0 - 1.6% (in accordance with the table below1 )|
|Response time|< 1 s (one CAN frame every 100ms)|
|Measurement Frequency|one can frame every 100ms|
|Start-up time|< 400ms|
|Expected Lifetime|10 years or 13’000h 2|



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SGX-BLD1<br>**----- End of picture text -----**<br>


1 Under 500mL/s airflow and stable condition point 

2 Can be higher with a lower measurement frequency and depend on detection time target 

© SGX Sensortech 2012-2025 

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## **Sensor drawing (with clip)** 

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39.20 ±0.50 KC<br>| | (~ (TS ES \<br>Ti fArce<br>|<br>16 ±0.15<br>23.60 ±0.20<br>37 ±0.30 KC<br>**----- End of picture text -----**<br>


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~~<br>(aN<br>4<br>é<br>Oe 20 ±0.15 KC<br>4 ±0.10 2 ±0.10 2.50 ±0.10<br>**----- End of picture text -----**<br>


## **Delphi clip drawing** 

## **Sensor variants and additional accessories** 

||**Part Number**|
|---|---|
|Sensor SGX-BLD1|SGX-BLD1|
|Sensor SGX-BLD1 with clip|SGX-BLD1C|
|Delphi clip<br>Connectioncable=~S*~*=<“‘SOS!*~<“‘“‘|BLD_Clip<br>CAN-Cable<br> ~~Ot~~|



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SGX Europe Sp. z o.o. T: +48 (0) 32 438 4778 Konduktorska 42 St., 40-155 Katowice, E: sales.is@sgxsensortech.com Poland www.sgxsensortech.com 

## **Interface and integration** 

## **Principle** 

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Connector type Tyco Electronics AMP-1-0967640-1 coding A<br>Communication 500kbps High Speed<br>Pin1: Vbat<br>Pin2: Ground<br>Pinout Pin3: CAN Low<br>Pin4: CAN High<br>**----- End of picture text -----**<br>


## **Recommendation for integration** 

The sensor must be exposed to measure the air from the **battery pack only** . Preferably, the filtering membrane included in the module should be facing downward. If this is not possible, it should be vertical, but should never be facing upward, to prevent accumulation of dirt, water. 

## Bayonet fixing, mating with following interface: 

Optional, the sensor can be mounted with a standard Delphi-clip. 

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Delphi-Clip<br>**----- End of picture text -----**<br>


Recommended hole for Delphi-Clip 

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15±0.1mm<br>8±0.1mm<br>**----- End of picture text -----**<br>


Sheet Metal Thickness (Max) 0.8 – 2.8mm 

© SGX Sensortech 2012-2025 

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SGX Europe Sp. z o.o. Konduktorska 42 St., 40-155 Katowice, Poland 

T: +48 (0) 32 438 4778 E: sales.is@sgxsensortech.com www.sgxsensortech.com 

## **Proposed CAN frame description** 

The default ID is 0x256 and CAN frame layout is as shown below: 

|7|6|||5|4||3|||2|1|||0|0||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|0<br>Temperature_u8|||||||||||||||||
|msb|7|6||5||4||3||2||1||lsb|0||
|1<br>msb<br>15||14||13||12||11||10||9|||8||
|2<br>Hydrogen_u16<br>23||22||21||20||19||18||17||lsb|16||
|3<br>B_task_timing_issue<br>31<br>B_over_under_temperatur<br>30|||B_rht_sensor_issue<br>29||B_temperature_plausibility_issue<br>28||B_h2_saturation|27|B_reverse_polarity_issue<br>26||B_input_overcurrent<br>25|||B_under_over_voltage<br>24|||
|4<br>Voltage_u8|||||||||||||||||
|msb<br>39||38||37||36||35||34||33||lsb|32||
|5<br>Humidity_u8|||||||||||||||||
|msb<br>47||46||45||44||43||42||41||lsb|40||
|6<br>Roll_Counter_u8|||||||||||||||||
|msb<br>55||54||53||52||51||50||49||lsb|48||
|7|||||||||||||||||
|63||62||61||60||59||58||57|||56||
|Signal factor and offset are described below:||Signal factor and offset are described below:|||||||||||||||
|**Name**<br>**Message**<br>**Start bit**<br>**Length Byte Order Value Type**<br>**Factor**<br>**Offset**<br>**Min.**<br>**Max.**<br>**Unit**<br>Temperature (u8)<br>Sensor_Status_1<br>0<br>8<br>Motorola<br>Unsigned<br>-55<br>1<br>-55<br>-55<br>195<br>°C<br>Hydrogen percent<br>(u16)<br>Sensor_Status_1<br>16<br>16<br>Motorola<br>Unsigned<br>0<br>0.01<br>0<br>0<br>100<br>%<br>Overvoltage<br>Sensor_Status_1<br>24<br>1<br>Intel<br>Unsigned<br>0<br>1<br>0<br>0<br>1<br>Input overcurrent<br>Sensor_Status_1<br>25<br>1<br>Intel<br>Unsigned<br>0<br>1<br>0<br>0<br>1<br>Reverse polarity<br>issue<br>Sensor_Status_1<br>26<br>1<br>Intel<br>Unsigned<br>0<br>1<br>0<br>0<br>1<br>H2 saturation<br>Sensor_Status_1<br>27<br>1<br>Intel<br>Unsigned<br>0<br>1<br>0<br>0<br>1<br>Temperature<br>Plausibility issue<br>Sensor_Status_1<br>28<br>1<br>Intel<br>Unsigned<br>0<br>1<br>0<br>0<br>1<br>RHT sensor issue<br>Sensor_Status_1<br>29<br>1<br>Intel<br>Unsigned<br>0<br>1<br>0<br>0<br>1<br>Overtemperature<br>Sensor_Status_1<br>30<br>1<br>Intel<br>Unsigned<br>0<br>1<br>0<br>0<br>1<br>Task timing issue<br>Sensor_Status_1<br>31<br>1<br>Intel<br>Unsigned<br>0<br>1<br>0<br>0<br>1<br>Voltage (u8)<br>Sensor_Status_1<br>32<br>8<br>Motorola<br>Unsigned<br>0<br>0.1<br>0<br>0<br>25.5<br>V<br>Humidity (u8)<br>Sensor_Status_1<br>40<br>8<br>Motorola<br>Unsigned<br>20<br>0.5<br>0<br>0<br>100<br>%<br>Roll Counter (u4)<br>Sensor_Status_1<br>48<br>8<br>Motorola<br>Unsigned<br>0<br>1<br>0<br>0<br>15<br>Sones|||||||||||||||||
|- Voltage, Temperature and Humidity are internal for Hydrogen compensation purpose|- Voltage, Temperature and Humidity are internal for Hydrogen compensation purpose||||||||||||||||
|- Hydrogen is the output of the sensor in %|||||||||||||||||
|- The bits are for diagnosis purpose|||||||||||||||||



- Roll counter is a counter that increases from 0 to 15, with an increase of 1 at each frame sending 

DISCLAIMER: 

SGX Europe Sp. z o.o. reserves the right to change design features and specificaDons without prior noDficaDon. We do not accept any legal responsibility for customer applicaDons of our sensors. SGX Europe Sp. z o.o. accepts no liability for any consequenDal losses, injury or damage resulDng from the use of this document, the informaDon contained within or from any omissions or errors herein. This document does not consDtute an offer for sale and the data contained is for guidance only and may not be taken as warranty. Any use of the given data must be assessed and determined by the user thereof to be in accordance with federal, state and local laws and regulaDons. All specificaDons outlined are subject to change without noDce. 

SGX Europe Sp. z o.o. sensors are designed to operate in a wide range of harsh environments and condiDons. However, it is important that exposure to high concentraDons of solvent vapours is to be avoided, both during storage, fiĜ ng into instruments and operaDon. When using sensors on printed circuit boards (PCBs), degreasing agents should be used prior to the sensor being fiĦed. SGX Europe Sp. z o.o. makes every effort to ensure the reliability of its products. Where life safety is a performance requirement of the product, we recommend that all sensors and instruments using these sensors are checked for response to gas before use. 

## **Copyright© 2012-2025 SGX Sensortech All rights reserved.** 

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