S1. Scope. This standard specifies requirements for limitation of electrolyte spillage and retention of electric energy storage/conversion devices during and after. NHTSA is issuing this final rule to amend Federal Motor Vehicle Safety Standard (FMVSS) No. , “Electric-powered vehicles: Electrolyte. FMVSS No. was originally drafted based on a voluntary consensus standard, the Society of Automotive Engineers (SAE) Recommended.
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This standard applies to passenger cars, and to multipurpose passenger vehiclestrucks and buses with a GVWR of 4, kg or less, that use electrical propulsion components with working voltages more than 60 volts direct current VDC or 30 volts alternating current VACand whose speed attainable over a distance of 1.
Automatic disconnect means a device that when triggered, conductively separates a high voltage source from the electric power train or the rest of the electric power train.
Charge connector is a conductive device that, by insertion into a vehicle charge inlet, establishes an electrical connection of the vehicle to the external electric power supply for the purpose of transferring energy and exchanging information.
Connector means a device providing mechanical connection and disconnection of high voltage electrical conductors to a suitable mating component, including its housing.
Electric energy storage device means a high voltage source that stores energy vmvss vehicle propulsion. This includes, but is not limited to, a high voltage battery or battery pack, rechargeable energy storage device, and capacitor module. This includes, 30 is not limited to, a high voltage battery or battery pack, fuel cell stack, rechargeable energy storage device, and capacitor module.
This includes, but is not limited to, high voltage batteries or battery packs, fuel cell stacks, rechargeable energy storage systems, capacitor modules, gmvss, interconnects, and venting systems. Electrical chassis means conductive parts of the vehicle fmvsd electrical potential is taken as reference and which are: Electrical isolation of a high voltage source in the vehicle means the electrical resistance between the high voltage source and any of the vehicle’s electrical chassis divided by the working voltage of the high voltage source.
Electrical protection barrier is the part providing protection against direct contact fmvs high voltage live parts from any direction of access. Exposed conductive part is the conductive part that can be touched under the provisions of the IPXXB protection degree and that is not normally energized, but that can become electrically energized under isolation fault conditions.
This includes parts under a cover, if the cover can be removed without using tools. External electric power supply is a power supply external to the vehicle that provides electric power to charge the electric energy storage device in the vehicle through fmvas charge connector. Fuel cell system is a system containing the fuel cell stack sair processing system, fuel flow control system, exhaust system, thermal management system, and water management system.
High voltage source means any electric component which is contained in the electric power train or conductively connected to the electric power train and has a working fmsvs greater than 30 VAC or 60 VDC.
Indirect contact is the contact of persons with exposed conductive parts. Live part is a conductive part of the vehicle that is fmbss energized under normal vehicle operation.
Luggage compartment is the space in the vehicle for luggage accommodation, separated from the passenger compartment by the front or rear bulkhead and bounded by a roof, hood or trunk lidfloor, and side walls, as well as by electrical protection barriers provided for protecting the occupants from direct contact with high voltage live parts.
Passenger compartment is the space for occupant accommodation that is bounded by the roof, floor, side walls, doors, outside glazing, front bulkhead and rear bulkhead or rear gate, as well as electrical protection barriers provided for protecting the occupants from direct contact with high voltage live parts. Possible active driving mode is the vehicle mode when application of pressure to the accelerator pedal or activation of fmfss equivalent control or release of the brake system causes the electric power train to move the vehicle.
Propulsion system means an assembly of electric or electro-mechanical components or circuits that propel the vehicle using the energy that is supplied by a high voltage source. Service disconnect is the device for deactivation of an electrical circuit when conducting checks and services of the vehicle electrical propulsion system.
VAC means volts of alternating current AC expressed using the root mean square value. Vehicle charge inlet is the device on the electric vehicle into which the charge connector is inserted for the purpose of transferring energy and exchanging information from an external electric power supply. Working Voltage means the highest root mean square voltage of the fmvws source, which may occur across its terminals or between its terminals and any conductive parts in open circuit conditions or under normal operating conditions.
Each vehicle to which this standard applies, must meet the requirements in S5. Not more than 5. Spillage is measured from the time the vehicle ceases motion after a barrier impact test fmvsa 30 minutes thereafter, and throughout any static rollover after a barrier impact test. During and after each test specified in S6 of this standard:.
After each test specified in S6 of this standard, each high voltage source in a vehicle must meet one of the following requirements: In addition, the resistance between an exposed conductive part of the electrical protection barrier of the high voltage source and any other simultaneously reachable exposed conductive parts of electrical protection barriers within 2. In addition, the voltage between an exposed conductive part of fmvsa electrical protection barrier of the high voltage source and any other simultaneously reachable exposed conductive parts of electrical protection barriers within 2.
The symbol shown in Figure 6 fmcss be present on or near electric energy storage devices. The symbol in Figure 6 shall also be visible on electrical protection barriers which, when removed, expose live parts of high voltage sources. The symbol shall be yellow and the bordering and the arrow shall be black. Markings are not required for electrical connectors or the vehicle charge inlet. Cables for high voltage sources which are not located within electrical protection barriers shall be identified by having an outer covering with the color orange.
For a service disconnect which can be opened, disassembled, or removed without tools, protection degree IPXXB shall be provided when tested under procedures specified in S9. Direct contact protection for a connector shall be provided by mfvss the requirements specified in S5. Direct contact protection for a vehicle charge inlet shall be provided by meeting the requirements specified in S5.
The electrical isolation of a high voltage sourcedetermined in accordance with the procedure specified in S7. A high voltage source that is conductively connected to an electric component which is conductively connected to the electrical chassis and has a working voltage less than or equal to 60 VDCis not required to meet the electrical isolation requirements in S5.
Fkvss electrical isolation is measured at the high voltage live parts of the vehicle charge inlet and determined in fmvss with the procedure specified in S7. During the measurement, the rechargeable electric energy storage system may be disconnected.
DC high voltage sources of vehicles with a fuel cell system shall be monitored by an electrical isolation monitoring system that displays a warning for loss of isolation when tested according to S8. The system must monitor its own readiness and the warning display must be visible to the driver seated in the driver ‘s designated seating position.
For motor vehicles with an electric energy storage device that can be charged through a conductive connection with a grounded external electric power supplya device to enable conductive connection of the electrical chassis to the earth ground shall be provided. This device shall enable connection to the earth ground before exterior voltage is applied to the vehicle and retain the connection until cmvss the exterior voltage is removed from the vehicle.
At least a momentary indication shall be given to the driver each time the vehicle is first placed in possible active driving mode after manual activation of the propulsion system. This requirement does not apply under conditions where an internal combustion engine provides directly or indirectly the vehicle’s propulsion power when the vehicle is first placed in a possible active driving mode after manual activation of the propulsion system.
When leaving the vehicle, the driver shall be informed by an audible or visual signal if the vehicle is still in the possible active driving mode. If the on-board electric energy storage device can be externally charged, vehicle movement of more than mm by its own propulsion system fnvss not be possible as long as the charge connector of the external electric power supply is physically connected to the vehicle charge inlet in a manner that would permit charging of the electric energy storage device.
The vehicle must meet the requirements of S5. When the vehicle is tested according to S6, the requirements of S5. All measurements for calculating voltage s and electrical isolation are made after a minimum of 5 seconds after the vehicle comes to rest in tests specified in S6. Where a range is specified, the vehicle must be capable of meeting the requirements at all points within the range. The electric energy storage device shall be at the state-of-charge specified in either subparagraph abor c:.
In a test conducted under S6.
FMVSS 305: Electrolyte spillage and electrical shock protection for electric-powered vehicles
Each dummy is restrained only by means that are installed in the vehicle for protection at its seating position. In addition to the conditions of S7. Bypass any devices or systems that do not allow the propulsion system to be energized at the time of impact when the vehicle ignition is on and the vehicle is fvss neutral. For a high voltage source that has an automatic disconnect that is physically contained within itself, the electrical isolation measurement after the test is made from the side of the automatic disconnect connected to the electric power train or to the rest of the electric power train if the high voltage source is a component contained in the power train.
For a high voltage source that has an automatic disconnect that is not physically contained within itself, the electrical isolation measurement after the test is made fmvzs both the high voltage source side of the automatic disconnect and from the side of the automatic disconnect connected to the electric power train or to the rest of the electric power train if the high voltage source 350 a component contained in the power train.
Before any vehicle impact test, Vb is equal to or greater than the nominal operating voltage as specified by the vehicle manufacturer. Calculate the electrical isolation resistance Ri according to the formula shown.
For the purpose of determining the voltage level of the high voltage source specified in S5. Voltage Vb is measured across the two terminals of the voltage source. Voltages V1 fmvsd V2 are measured between the source and the electrical chassis. For a high voltage source that has an automatic disconnect fmvsss is physically contained within itself, the voltage measurement after the test is made from the side of the automatic disconnect connected to the electric power train or to the rest of the electric power train if the high voltage source is a component contained in the power train.
FMVSS Electrolyte spillage and electrical shock protection for electric-powered vehicles
For a high voltage source that has an automatic disconnect that is not physically contained within itself, the voltage measurement after the test is made from both the high voltage source side of the automatic disconnect and from the side of the automatic disconnect connected to the electric power train or to the rest of the electric power train if the high voltage source is a fmvsx contained in the power train. Test procedure for on-board electrical isolation monitoring system.
Prior to any impact test, the requirements of S5. S9 Test methods for physical barrier protection from electric shock due to direct and indirect contact with high voltage sources. If the probe partly or fully 3005 into the electrical protection barrier, it is placed in every possible position to evaluate contact with high voltage live parts. The methods specified in S9.
At the option of the manufacturer, protection against indirect contact with high voltage sources shall be determined using the test method in subparagraph fmvsx or subparagraph b. The resistance tester is connected to the measuring points the electrical chassis and any exposed conductive part of electrical protection barriers or any two simultaneously reachable exposed conductive parts of electrical protection barriers that are less than 2.
The resistance between two exposed conductive fmgss of electrical protection barriers that are less than 2. It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are fkvss at the GPO site. Cornell Law School Search Cornell. United States Code U.