GB/T 34866-2017Vanadium flow battery - Safety requirements (English PDF)

3.1 Harm

Damage or harm to human health, damage to property or the environment.

3.2 Risk

A comprehensive measure of the possibility of injury and the severity of injury.

3.3 Safety

The state of exempting unacceptable risks.

3.4 Intendeduse

The use of products, processes or services based on the information provided by the supplier.

3.5 Reasonable foreseeable misuse

The use of products, processes, or services that are not in accordance with the supplier's regulations, but such results are caused by human activities that are easy to foresee.

3.6 Leakage

The phenomenon of electrolyte leakage or outflow from the stack, system pipeline and electrolyte storage tank.

[GB/T 29840-2013, definition 2.18]

4.1 Overall Security Strategy

4.1.1

The manufacturer shall ensure.

---Determine all foreseeable injuries during the expected service life of the battery system;

---According to GB/T 21109.3, IEC 61882 or IS014121, etc., the probability and severity of each of the above injuries have been conducted

Risk assessment;

---As far as possible in the design process, eliminate or reduce the assessed risk factors;

--- Take necessary protective measures for various risks that have not been eliminated or cannot be eliminated (such as providing alarms and safety devices);

---The user has been informed of the additional security measures that need to be adopted.

4.1.2

The battery system shall meet the following overall safety requirements.

---The design and structure of the battery system should meet the safety requirements under the expected use and reasonably foreseeable misuse conditions;

---The battery system can withstand the misuse that makes it invalid, and should not cause obvious damage.

4.2 General requirements

4.2.1

When designing, manufacturing, installing, debugging, using and maintaining the battery system, avoid the various gases and liquids released in the above process.

Risks caused by body, dust or vapor.

4.2.2

When designing and manufacturing battery systems, safety factors should be fully considered under the premise of ensuring material performance.

4.2.3

The selection of pumps, valves, pipelines and other components should fully consider the concentration and volume of electrolyte components and related standards and specifications.

4.2.4

Under normal use, reasonably foreseeable misuse and transportation, the battery system should have a certain degree of resistance to drop, vibration, and resistance.

A safe structure that can withstand environmental changes such as extrusion, temperature and atmospheric pressure.

4.2.5

In the design process of the battery system, the foreseeable hazardous gas should be considered, and the battery system should be installed with the function of discharging or processing the above gas.

Device.

4.2.6

In the design process of the battery system, the foreseeable dangerous liquid leakage should be considered, and the installation should be equipped with collection, recycling or safe

A device that handles the above-mentioned liquid functions.

4.2.7

The battery system should have necessary monitoring equipment and alarm devices at appropriate locations.

4.2.8

The design and installation of monitoring and sensing devices should be reliable and applicable, and the installation location should meet maintenance requirements.

4.2.9

The layout, fire protection and civil engineering of the flow battery room shall meet the requirements of GB 51048.

4.3 Electrical safety requirements

4.3.1

The manufacturer shall provide methods to slow down or prevent short circuits in the battery system, including but not limited to the following methods.

a) In the event of a short-circuit fault, stop the operation of the battery system;

b) The complete branch formed by the series connection of stacks should be equipped with at least one current circuit breaker, fuse or circuit breaker with equivalent functions.

Turn on the device.

4.3.2

The grounding of the battery system should meet the requirements of GB 50169.

4.3.3

For the battery system placed outdoors, it should be equipped with a solid lightning protection grounding device, and meet the requirements of GB 50057.

4.4 Gas safety requirements

4.4.1

A trace amount of dangerous gases such as hydrogen will be generated during the operation of the battery system. Corresponding gas discharge or treatment devices should be equipped for control.

The concentration of the dangerous gas is within the safe range.

4.4.2

The gas discharge or treatment device should meet the manufacturer's design, manufacturing and installation requirements.

4.4.3

The gas exhaust device can choose natural ventilation or mechanical ventilation, the ventilation frequency, ventilation speed and

The structure should comply with the relevant standards.

Note. For battery systems installed indoors, it is recommended to equip with mechanical ventilation devices to keep the concentration of indoor dangerous gases within a safe range.

4.4.4

During the debugging, operation and maintenance of the battery system, the ventilation device should be kept in working condition.

4.4.5

The end of the exhaust pipe of the ventilation device should be placed in an outdoor safe area and marked, away from fire sources and air inlets.

4.4.6

In order to monitor and warn of possible hazards, gas concentration sensing devices and alarms can be selectively configured at suitable positions in the battery system.

Police device.

4.4.7

Under normal and stable operating conditions, the emission of hazardous gases should meet the requirements of GB 4962.

4.5 Liquid safety requirements

4.5.1

Considering that the battery system may leak corrosive electrolyte during installation, debugging, operation and maintenance, it should be equipped with a leakage

The liquid collection device collects the leaked liquid to avoid the harm caused by the electrolyte leakage. Leakage collection device should at least realize collection, recycling or safety

One of the functions such as processing, the leakage collection device can be used but not limited to.

---Droplet collection tray;

---Anti-overflow baffle;

---Leaking liquid collection channel;

---Secondary cofferdam;

---Leaking liquid collection storage tank/pool;

---Neutralize the storage tank/pool.

4.5.2

The leakage collection device should be made of acid-resistant materials, or the surface in contact with the electrolyte should be coated with an acid-resistant layer.

4.5.3

The foreseeable areas and parts in contact with the leaking electrolyte should be coated with an acid-resistant corrosion layer. The inner wall of the box battery system should be

Carry out acid corrosion treatment.

4.5.4

Sensing devices should be equipped for frequent leakage locations, which can provide alarm information when leakage occurs.

4.5.5

Operators who contact the electrolyte during the installation and maintenance of the battery system should be trained. To prevent possible harm, you should wear

Wear appropriate protective equipment (such as safety glasses, protective gloves, protective clothing, acid-resistant shoes, etc.).

4.6 Machinery safety requirements

4.6.1

The main components of the battery system (including but not limited to stacks, electrolyte tanks, piping systems, battery management systems) and other auxiliary structures

Full consideration should be given to stability and strength when designing and manufacturing, so that it will not tilt, tip over, fall or fall when used under predetermined operating conditions.

Risk of accidental movement.

4.6.2

When there is a place for the operator to move or stand in the process of designing, manufacturing, installing, debugging, using and maintaining the battery system, there should be

Measures to prevent the operator from slipping, tripping or falling on the above components.

4.7 Operational safety requirements

4.7.1 Start

The battery system should be equipped with automatic protection and locking devices to ensure correct startup.

4.7.2 Emergency stop function

In order to avoid uncontrollable hazards caused by misoperation or other reasons in the battery system (the hazard cannot be managed by the battery)

System correction), the battery system should have an emergency shutdown device that can realize manual and automatic control.

4.8 Safety requirements during installation and operation

4.8.1

The installation of the battery system shall meet the manufacturer's requirements.

4.8.2

Various risks caused by various gases, liquids, dust or vapors released during installation shall be avoided.

4.8.3

During the installation process, personnel should avoid contact with possible live parts.

4.8.4

For possible dangers or hazards during the installation process, necessary safety signs shall be provided.

4.8.5

The manufacturer shall provide the necessary safety plan description in the product manual. Operators are working on debugging, maintenance and cleaning

Please refer to the above instructions to ensure the safety of personnel and other equipment in the above process.

4.8.6

The operator should use the necessary tools during the maintenance of the battery system. For operations with electrical hazards and electrolyte hazards,

Work should be equipped with corresponding safety tools and protective equipment (such as tools with insulated handles, insulated gloves, acid-proof clothing, etc.).

4.8.7

When the battery system is in operation, the operator should avoid using open flames or those that may produce arcs during maintenance.

equipment.

5.1

The battery system should have appropriate warning signs, which include electrical hazards, combustible gas hazards and corrosive liquid hazards.

5.2

The warning signs should be clearly identifiable and placed in a suitable location near the source of hazard.

6.1 Transportation

6.1.1

The transportation temperature of the battery system shall meet the requirements specified by the manufacturer.

6.1.2

During transportation, the battery system shall not be subject to severe mechanical impact, exposure to the sun, rain, or inverted.

6.1.3

During the loading and unloading process, the battery system should be handled with care, and it is strictly forbidden to throw, roll, or press heavily.

6.2 Storage

6.2.1

The battery system should be designed and packaged so that it can be stored safely without damage (for example, it has sufficient stability and special reinforcement.

Wait).

6.2.2

The battery system should be stored in a dry, clean and well-ventilated warehouse with a temperature of 0°C~40°C (or the temperature range specified by the manufacturer)

Library.

6.2.3

The battery system should not be exposed to direct sunlight, and the distance from the heat source should not be less than 2m.

6.2.4

The battery system must not be upside down, and avoid mechanical shock and heavy pressure.

6.3 Disposal

For discarded battery system components and materials (such as stacks, electrolyte, etc.), the manufacturer shall provide requirements for the disposal of components and materials

And methods or specifications for reference.