Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This specification replaces GJB 2831-1997 General specification for hermetically sealed Nickel-Hydrogen rechargeable cells from the implementation date.
The following significant technical changes have been made with respect to GJB 2831-1997:
a) two significant technical contents, i.e. air tightness inspection of hydrogen working medium and thermal vacuum, are added;
b) the charge retention is increased from 65% to 75%, and the depth of discharge is increased from 70% to 80%;
c) the lifetime is increased from 10 years to 12 years.
This specification was proposed by the Electronic Information Base Department of the General Armaments Department of the PLA.
This specification was firstly issued in 1997, and this edition is the first revision.
General specification for hermetically sealed Nickel-Hydrogen rechargeable cells in spacecraft
1 Scope
This specification specifies the general technical requirements, quality assurance requirements and delivery preparation of hermetically sealed Nickel-Hydrogen rechargeable cells in spacecraft.
This specification is applicable to hermetically sealed Nickel-Hydrogen rechargeable cells for individual pressure vessels and common pressure vessels (hereinafter referred to as "rechargeable cells").
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this specification. For dated reference, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this specification. However parties to agreements based on this specification are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references or references with version not indicated, the latest edition of the normative document referred to applies.
GB 191-2000 Packaging - Pictorial marking for handling of goods
GJB 360A-1996 Test methods for electronic and electrical component parts
GJB 1027-1990 Environmental test requirements for satellites
3 Requirements
3.1 General
The rechargeable cells shall meet all requirements specified in this specification and corresponding detailed specifications. If the requirements of this specification are inconsistent with the relevant detailed specifications, the latter shall prevail.
3.2 Qualification
The products submitted according to this specification shall be qualified ones.
3.3 Materials
Materials used for rechargeable cells shall comply with relevant standards and requirements of this specification.
3.4 Design and structure
3.4.1 Electrodes
3.4.1.1 Positive electrode
Nickel electrode is adopted.
3.4.1.2 Negative electrode
Hydrogen catalytic electrode is adopted.
3.4.2 Diaphragm
Non-electronic conductive material with high alkali absorption rate and stability in alkali solution is adopted.
3.4.3 Case (including pole)
3.4.3.1 Material
The rechargeable cell case shall be made of alkali resistant, hydrogen embrittlement resistant and high strength material.
3.4.3.2 Intensity
The strength of rechargeable cell case shall meet the following requirements:
a) the case fracture pressure shall be greater than twice the maximum working pressure of rechargeable cell;
b) the weld of the rechargeable cell shall be inspected before filling electrolyte, and shall be free of defects such as pores, undercuts, inclusions and breakpoints;
c) the number of pressure-resistant cycles of rechargeable cell case shall be greater than 30,000.
3.4.3.3 Case tightness
Leakage rate: ≤10-1Pa.cm3/s.
3.5 Appearance and marking
3.5.1 Appearance
The rechargeable cell case shall be free of defects such as deformation, collision, crack, dit and oxidation, and the pole shall be free of fracture.
3.5.2 Marking
3.5.2.1 Polarity mark
The polarity of the rechargeable cell shall be clearly and firmly indicated near the pole of the rechargeable cell case, with the positive pole marked with "+" or red, and the negative pole with "-” or black.
3.5.2.2 Product mark
The rechargeable cell shall have at least the following marks. The marks shall be clear, correct and firm.
a) model or mark;
b) manufacturing date or production batch No.;
c) name or trademark of the manufacturer.
3.6 Overall dimension and weight
As specified in relevant detailed specifications.
3.7 Tightness
3.7.1 Liquid tightness
The rechargeable cell is free of leakage during tightness inspection.
3.7.2 Air tightness
The leakage rate of rechargeable cell is less than 10-1Pa.cm3/s.
3.8 Rated capacity
The rated capacity of the rechargeable cell shall comply with the relevant detailed specifications, and shall be expressed as C2 in Ah.
3.9 Charge retention
The 3d charge retention rate of individual pressure vessel cell shall not be less than 75%; the charge retention of common pressure vessel cell is specified in relevant detailed specifications.
3.10 High and low temperature capacity
The capacity of the rechargeable cell at -20℃ and 30℃ shall not be less than 80% of the rated capacity.
3.11 Steady-state acceleration
During the test, the discharging current and voltage curve of the rechargeable cell shall be free of abrupt change and mechanical damage.
3.12 Vibration
3.12.1 Random vibration
During the test, the discharging current and voltage curve of the rechargeable cell shall be free of abrupt change and mechanical damage.
3.12.2 Vibration (sinusoidal)
During the test, the discharging current and voltage curve of the rechargeable cell shall be free of abrupt change and mechanical damage.
3.13 Impact (specified pulse)
During the test, the discharging current and voltage curve of the rechargeable cell shall be free of abrupt change and mechanical damage.
3.14 Thermal vacuum
The rechargeable cell shall be subjected to charge-discharge test in thermal vacuum test, wherein, the test temperature, charging current, discharging current and rechargeable cell voltage shall comply with relevant detailed specifications, and the rechargeable cell shall be free of leakage.
3.15 Overdischarge
The positive limit discharging voltage curve of individual pressure vessel cell shall change smoothly without abrupt change, and the reverse charging voltage during overdischarge shall not be lower than -0.3V; the negative limit cells are specified in relevant detailed specifications.
Common pressure vessel cells are specified in relevant detailed specifications.
3.16 Overcharge
The voltage curve of individual pressure vessel cell shall change smoothly without abrupt change, and the charging voltage shall be less than 1.6V.
Common pressure vessel cells are specified in relevant detailed specifications.
3.17 Lifetime
The test lifetime of individual pressure vessel cells for simulating geosynchronous orbit shall not be less than 12 years, and the number of test lifetime cycles for simulating near-Earth orbit shall not be less than 15,000.
The lifetime of common pressure vessel cells is specified by relevant detailed specifications.
4 Quality assurance requirements
4.1 Inspection classification
The inspections specified in this specification are classified as follows:
a) production process inspection;
b) appraisal inspection;
c) quality conformance inspection.
4.2 Inspection conditions
Unless otherwise specified, all inspections in this specification shall be conducted under the standard atmospheric conditions specified in GJB 360A-1996.
4.3 Inspection device accuracy
4.3.1 Voltage measurement
The accuracy of voltmeter is 0.5 grade or above, and that of digital meter or other automatic recording device shall not be less than ±0.5%.
4.3.2 Current measurement
The accuracy of ammeter is 0.5 grade or above, and that of digital meter or other automatic recording device shall not be less than ±0.5%.
4.3.3 Temperature measurement
The accuracy of thermometer is not less than ±0.5℃, and that of other automatic measuring device shall not be lower than ±1℃.
4.3.4 Pressure measurement
The accuracy of pressure gauge is 1.5 grade or above.
4.4 Production process inspection
It is carried out according to the method specified in 4.7.1 and the number of samples, and shall meet the requirements of 3.4.3. The inspection data shall be provided to the appraisal organization or the user.
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This specification replaces GJB 2831-1997 General specification for hermetically sealed Nickel-Hydrogen rechargeable cells from the implementation date.
The following significant technical changes have been made with respect to GJB 2831-1997:
a) two significant technical contents, i.e. air tightness inspection of hydrogen working medium and thermal vacuum, are added;
b) the charge retention is increased from 65% to 75%, and the depth of discharge is increased from 70% to 80%;
c) the lifetime is increased from 10 years to 12 years.
This specification was proposed by the Electronic Information Base Department of the General Armaments Department of the PLA.
This specification was firstly issued in 1997, and this edition is the first revision.
General specification for hermetically sealed Nickel-Hydrogen rechargeable cells in spacecraft
1 Scope
This specification specifies the general technical requirements, quality assurance requirements and delivery preparation of hermetically sealed Nickel-Hydrogen rechargeable cells in spacecraft.
This specification is applicable to hermetically sealed Nickel-Hydrogen rechargeable cells for individual pressure vessels and common pressure vessels (hereinafter referred to as "rechargeable cells").
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this specification. For dated reference, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this specification. However parties to agreements based on this specification are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references or references with version not indicated, the latest edition of the normative document referred to applies.
GB 191-2000 Packaging - Pictorial marking for handling of goods
GJB 360A-1996 Test methods for electronic and electrical component parts
GJB 1027-1990 Environmental test requirements for satellites
3 Requirements
3.1 General
The rechargeable cells shall meet all requirements specified in this specification and corresponding detailed specifications. If the requirements of this specification are inconsistent with the relevant detailed specifications, the latter shall prevail.
3.2 Qualification
The products submitted according to this specification shall be qualified ones.
3.3 Materials
Materials used for rechargeable cells shall comply with relevant standards and requirements of this specification.
3.4 Design and structure
3.4.1 Electrodes
3.4.1.1 Positive electrode
Nickel electrode is adopted.
3.4.1.2 Negative electrode
Hydrogen catalytic electrode is adopted.
3.4.2 Diaphragm
Non-electronic conductive material with high alkali absorption rate and stability in alkali solution is adopted.
3.4.3 Case (including pole)
3.4.3.1 Material
The rechargeable cell case shall be made of alkali resistant, hydrogen embrittlement resistant and high strength material.
3.4.3.2 Intensity
The strength of rechargeable cell case shall meet the following requirements:
a) the case fracture pressure shall be greater than twice the maximum working pressure of rechargeable cell;
b) the weld of the rechargeable cell shall be inspected before filling electrolyte, and shall be free of defects such as pores, undercuts, inclusions and breakpoints;
c) the number of pressure-resistant cycles of rechargeable cell case shall be greater than 30,000.
3.4.3.3 Case tightness
Leakage rate: ≤10-1Pa.cm3/s.
3.5 Appearance and marking
3.5.1 Appearance
The rechargeable cell case shall be free of defects such as deformation, collision, crack, dit and oxidation, and the pole shall be free of fracture.
3.5.2 Marking
3.5.2.1 Polarity mark
The polarity of the rechargeable cell shall be clearly and firmly indicated near the pole of the rechargeable cell case, with the positive pole marked with "+" or red, and the negative pole with "-” or black.
3.5.2.2 Product mark
The rechargeable cell shall have at least the following marks. The marks shall be clear, correct and firm.
a) model or mark;
b) manufacturing date or production batch No.;
c) name or trademark of the manufacturer.
3.6 Overall dimension and weight
As specified in relevant detailed specifications.
3.7 Tightness
3.7.1 Liquid tightness
The rechargeable cell is free of leakage during tightness inspection.
3.7.2 Air tightness
The leakage rate of rechargeable cell is less than 10-1Pa.cm3/s.
3.8 Rated capacity
The rated capacity of the rechargeable cell shall comply with the relevant detailed specifications, and shall be expressed as C2 in Ah.
3.9 Charge retention
The 3d charge retention rate of individual pressure vessel cell shall not be less than 75%; the charge retention of common pressure vessel cell is specified in relevant detailed specifications.
3.10 High and low temperature capacity
The capacity of the rechargeable cell at -20℃ and 30℃ shall not be less than 80% of the rated capacity.
3.11 Steady-state acceleration
During the test, the discharging current and voltage curve of the rechargeable cell shall be free of abrupt change and mechanical damage.
3.12 Vibration
3.12.1 Random vibration
During the test, the discharging current and voltage curve of the rechargeable cell shall be free of abrupt change and mechanical damage.
3.12.2 Vibration (sinusoidal)
During the test, the discharging current and voltage curve of the rechargeable cell shall be free of abrupt change and mechanical damage.
3.13 Impact (specified pulse)
During the test, the discharging current and voltage curve of the rechargeable cell shall be free of abrupt change and mechanical damage.
3.14 Thermal vacuum
The rechargeable cell shall be subjected to charge-discharge test in thermal vacuum test, wherein, the test temperature, charging current, discharging current and rechargeable cell voltage shall comply with relevant detailed specifications, and the rechargeable cell shall be free of leakage.
3.15 Overdischarge
The positive limit discharging voltage curve of individual pressure vessel cell shall change smoothly without abrupt change, and the reverse charging voltage during overdischarge shall not be lower than -0.3V; the negative limit cells are specified in relevant detailed specifications.
Common pressure vessel cells are specified in relevant detailed specifications.
3.16 Overcharge
The voltage curve of individual pressure vessel cell shall change smoothly without abrupt change, and the charging voltage shall be less than 1.6V.
Common pressure vessel cells are specified in relevant detailed specifications.
3.17 Lifetime
The test lifetime of individual pressure vessel cells for simulating geosynchronous orbit shall not be less than 12 years, and the number of test lifetime cycles for simulating near-Earth orbit shall not be less than 15,000.
The lifetime of common pressure vessel cells is specified by relevant detailed specifications.
4 Quality assurance requirements
4.1 Inspection classification
The inspections specified in this specification are classified as follows:
a) production process inspection;
b) appraisal inspection;
c) quality conformance inspection.
4.2 Inspection conditions
Unless otherwise specified, all inspections in this specification shall be conducted under the standard atmospheric conditions specified in GJB 360A-1996.
4.3 Inspection device accuracy
4.3.1 Voltage measurement
The accuracy of voltmeter is 0.5 grade or above, and that of digital meter or other automatic recording device shall not be less than ±0.5%.
4.3.2 Current measurement
The accuracy of ammeter is 0.5 grade or above, and that of digital meter or other automatic recording device shall not be less than ±0.5%.
4.3.3 Temperature measurement
The accuracy of thermometer is not less than ±0.5℃, and that of other automatic measuring device shall not be lower than ±1℃.
4.3.4 Pressure measurement
The accuracy of pressure gauge is 1.5 grade or above.
4.4 Production process inspection
It is carried out according to the method specified in 4.7.1 and the number of samples, and shall meet the requirements of 3.4.3. The inspection data shall be provided to the appraisal organization or the user.
