GB/T 37996-2019 PDF in English
GB/T 37996-2019 (GB/T37996-2019, GBT 37996-2019, GBT37996-2019)
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| GB/T 37996-2019 | English | 170 |
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Rubber seals used in the power lithium battery
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Standards related to (historical): GB/T 37996-2019
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GB/T 37996-2019: PDF in English (GBT 37996-2019) GB/T 37996-2019
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.140.50
G 43
Rubber seals used in the power lithium battery
ISSUED ON: AUGUST 30, 2019
IMPLEMENTED ON: JULY 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Requirements ... 5
5 Test methods ... 7
6 Inspection rules ... 10
7 Identification, packaging, transportation, storage ... 11
Rubber seals used in the power lithium battery
1 Scope
This Standard specifies the terms and definitions, requirements, test methods,
inspection rules, identification, packaging, transportation, and storage of rubber
seals used in the power lithium battery.
This Standard applies to rubber seals used in the power lithium battery
(hereinafter referred to as seals).
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 528 Rubber, vulcanized or thermoplastic - Determination of tensile
stress-strain properties
GB/T 531.1 Rubber, vulcanized or thermoplastic - Determination of
indentation hardness - Part 1: Durometer method (Shore hardness)
GB/T 1690 Rubber, vulcanized or thermoplastic - Determination of the effect
of liquids
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1:
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB/T 2900.41 Electrotechnical terminology - Primary and secondary cells
and batteries
GB/T 2941 Rubber - General procedures for preparing and conditioning test
pieces for physical test methods
GB/T 3452.1 Fluid power systems - O-rings - Part 1: Inside diameters, cross-
sections, tolerances and size identification code
GB/T 3512 Rubber, vulcanized or thermoplastic - Accelerated ageing and
heat resistance tests - Air-oven method
GB/T 3672.1 Rubber - Tolerances of products - Part 1: Dimensional
tolerances
GB/T 5721 General rules of identification, packaging, transportation and
storage for rubber sealing products
GB/T 7759.1 Rubber, vulcanized or thermoplastic - Determination of
compression set - Part 1: At ambient or elevated temperatures
3 Terms and definitions
The terms and definitions defined in GB/T 2900.41 apply to this document.
4 Requirements
4.1 Appearance
There shall be no rubber edge, lack of rubber, cracks, air bubbles, impurities,
and filler protrusions on the surface of seals.
4.2 Specification and dimension
The dimensions and tolerances of the O-ring shall comply with the provisions
of the G series in GB/T 3452.1. The dimensions and tolerances of the
rectangular ring shall comply with the provisions of M2 level in GB/T 3672.1.
4.3 Insulation resistance
The resistance index is negotiated by the manufacturer and the user.
4.4 Properties of rubber materials
The seal is made of ethylene-propylene rubber or fluororubber as the base
material. The property requirements are shown in Table 1 and Table 2.
of GB/T 1690 (take the specimen out of the liquid until the measurement is
completed; it shall not exceed 5 min); calculate the percentage of mass change.
6 Inspection rules
6.1 For rubber materials produced in the same shift and machine, no more than
50 kg is a batch. For seals of the same specification produced from the same
batch of rubber materials, no more than 5000 pieces are a batch.
6.2 500 g shall be randomly taken from each batch of rubber materials to
prepare specimens. According to the requirements of items 1 to 4 in Table 1 or
Table 2, carry out exit-factory inspection.
6.3 The appearance of seals shall be 100% inspected. The dimensions of seals
shall be inspected according to GB/T 2828.1. The inspection level is II. The
normal single inspection AQL=2.5. For the insulation resistance of seals, 3
seals shall be randomly selected from each batch for testing.
6.4 When one of the following conditions exists, all requirements of Clause 4
shall be inspected:
- When the product is transferred to another factory for production or new
product is subject to pattern evaluation;
- When there are major changes in materials and processes that may affect
product properties after formal production;
- No less than once every six months during normal production;
- When production resumes after a product has been discontinued for more
than six months;
- When there is a big difference between the exit-factory inspection result
and the last type inspection.
6.5 If the appearance inspection of a seal is disqualified, this seal is disqualified.
If the dimension of one of the seals is disqualified, this batch is disqualified. If
the insulation resistance is disqualified, this batch of seals is disqualified.
6.6 When there is a nonconformity in the inspection results of rubber material,
double number of specimens shall be taken for re-inspection of the
nonconformity item. If the re-inspection is still disqualified, it is deemed
disqualified.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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