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General requirements for swapping battery pack cooling connector of electric vehicle
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NB/T 10436-2020: PDF in English (NBT 10436-2020) NB/T 10436-2020
NB
ENERGY INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.99
CSS T 33
General requirements for swapping battery pack cooling
connector of electric vehicle
ISSUED ON: OCTOBER 23, 2020
IMPLEMENTED ON: FEBRUARY 02, 2021
Issued by: National Energy Administration
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 General requirements ... 5
5 Test methods ... 8
6 Inspection rules ... 9
7 Marking, packaging, transportation and storage ... 11
Appendix A (Informative) Specifications and dimensions for swapping battery pack
cooling connector of electric vehicle ... 12
General requirements for swapping battery pack cooling
connector of electric vehicle
1 Scope
This document specifies the general requirements, test methods, inspection rules,
and requirements for marking, packaging, transportation, and storage of the
swappable battery pack liquid-cooled cooling connector of electric vehicle (referred
to as the cooling connector).
This document applies to the swappable battery pack liquid-cooled cooling
connector of electric vehicle, and does not apply to air-cooled and other cooling
connectors.
2 Normative references
The following documents are normatively referenced in this document and are
indispensable for its application. For dated references, only the version
corresponding to that date is applicable to this document; for undated references, the
latest version (including all amendments) is applicable to this document.
GB/T 191, Packaging - Pictorial marking for handling of goods
GB/T 4208-2017, Degrees of protection provided by enclosure (IP code)
GB/T 11918.1-2014, Plugs, socket-outlet and couplers for industrial purposes -
Part 1: General requirements
GB/T 19596, Terminology of electric vehicles
GB/T 20082, Hydraulic fluid power - Fluid contamination - Determination of
particulate contamination by the counting method using an optical microscope
GB/T 29317, Terminology of electric vehicle charging/battery swap infrastructure
GB/T 32879-2016, General technical requirements for battery box connectors for
replacement of electric vehicles
GB 38031-2020, Electric vehicles traction battery safety requirements
3 Terms and definitions
Terms and definitions determined by GB/T 19596, GB/T29317 and GB/T
32879-2016, as well as the following, are applicable to this document.
3.1 Swappable battery pack cooling connector
The fluid connector – realizing the conduction of coolant between the battery pack
and the electric vehicle, or between the battery pack and the charging rack – which is
composed of a cooling coupler plug and a cooling coupler socket-outlet.
3.2 Cooling coupler plug
The part – of the swappable battery pack cooling connector – that is connected with
the battery pack.
3.3 Cooling coupler socket-outlet
The part – of the swappable battery pack cooling connector – that is connected with
the electric vehicle or the charging rack.
3.4 Insertion and extraction endurance
The insertion-and-extraction coupling times of the cooling coupler plug and the
cooling coupler socket-outlet within the specified performance range.
4 General requirements
4.1 Functional structure requirements
The cooling connector shall meet the following functional structure requirements:
a) Accessible surfaces of the cooling connector shall be free of burrs, flashes and
similar sharp edges.
b) The cooling coupler plug and socket-outlet – before being installed and used –
shall be provided with a dust cover.
c) The cooling coupler plug and socket-outlet shall have a dust-proof function
during the coupling process.
d) The cooling coupler plug and socket-outlet shall have the function of a stop
valve.
e) When the cooling coupler plug is connected to the socket-outlet, the fluid shall
be connected and there shall be no leakage after coupling.
c) After the plug is uncoupled from the socket, the floating mechanism shall be
able to reset automatically.
d) The mechanical connection shall be free from loosening.
Note: The insertion and extraction of the cooling connector shall be counted as one
cycle.
4.9 Vibration requirements
The cooling connector shall meet the requirements of reliable connection, intact
structure, no looseness and no leakage during and after the vibration test.
4.10 Shock requirements
The cooling connector shall meet the requirements of reliable connection, intact
structure, no looseness and no leakage during and after the shock test.
4.11 Protection level
The protection level of the cooling connector shall meet the requirements of IP67 in
both coupled and uncoupled states.
4.12 Guiding and floating function
The guiding function and floating range of the cooling connector shall meet the
following requirements:
a) When the cooling coupler plug and socket are coupled, they shall have the
function of guiding and floating. When coupling, the position deviation shall
be automatically corrected to ensure accurate connection; the guiding
mechanism shall be able to correct the position deviation of not less than 5 mm
in the vertical coupling direction, and the guiding mechanism shall be able to
correct the angular deviation of the coupling direction not less than 1°.
b) The floating follower mechanism shall be able to follow a position offset of not
less than 5 mm along the coupling direction.
c) The floating follower mechanism shall be able to follow a position offset of not
less than 5 mm along the vertical coupling direction.
d) The floating follower mechanism shall be able to follow an angular offset not
less than 1°.
e) The floating mechanism shall be able to reset automatically when the cooling
coupler plug is disconnected from the socket-outlet.
4.13 Corrosion resistance and rust prevention
The corrosion resistance and rust prevention of the cooling connector shall comply
with the provisions in Chapter 28 of GB/T 11918.1-2014.
4.14 Cleaning requirements
The soluble matter and solid residue on the inner surface of the connector can be
cleaned by solvent, and the maximum particle size of the inner wall shall be less than
800 μm.
4.15 Connection requirements for cooling coupler plug and socket
The connection between the cooling coupler plug and socket shall meet the
following requirements:
a) The cooling connector supports quick insertion and extraction by mechanical
equipment.
b) During the coupling process of the cooling connector, there shall not be more
than 0.5 mL of liquid cooling leakage.
c) When the cooling connector is connected, there shall be no leakage.
d) During the coupling process of the cooling connector and the driving process
of the vehicle, there shall be no abnormal mechanical noise at the coupling of
the cooling connector.
5 Test methods
5.1 Test conditions
The test conditions shall be based on the following benchmarks:
a) Unless otherwise specified, the test specimen shall be tested under the
conditions of an ambient temperature of 25°C ± 5°C and a relative humidity of
5% ~ 95%.
b) All test instruments and equipment shall have sufficient accuracy. The accuracy
shall be at least one order of magnitude higher than the accuracy of the
measured index; alternatively, the error shall be less than 1/3 of the allowable
error of the measured parameter.
5.2 Environmental testing
The high and low temperature alternating test shall be carried out according to 8.2.8
in GB 38031-2020.
The damp and hot cycling test shall be performed according to 8.2.5 in GB
38031-2020.
6.4 Judgment of conformity
The type inspection and ex-factory inspection items shall meet the requirements in
Table 1. Only when the test items of each category meet the requirements can the
product be judged qualified, otherwise it will be judged unqualified.
7 Marking, packaging, transportation and storage
7.1 Marking
The marking shall be clear, conspicuous, firm and reliable. The content shall include:
a) manufacturer’s name and trademark.
b) product model, name.
c) the year and month of product manufacture.
d) number or serial number of the product.
7.2 Packaging
Product packaging shall meet the requirements of GB/T 191.
7.3 Transportation
During transportation, the cooling connector shall not be subject to severe
mechanical impact, or exposure to the sun or rain. During the loading and unloading
process, the products shall be handled with care, and throwing and heavy pressure
are strictly prohibited.
7.4 Storage
The cooling connector shall be stored in a dry, clean, and well-ventilated room where
the surrounding air does not contain acidic or other corrosive and explosive
substances. They shall not be exposed to direct sunlight, and the distance from the
heat source shall not be less than 2 m; they shall not be under heavy pressure. During
storage, they shall not be exposed to rain, sun, condensation and frost.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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