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Writer: TOPAKRelease time: 2020-06-17Page View: 468
One、Background of the case
Surveying and mapping is a long history and very important discipline developed from human production practice, is the basis of national economic development, and is widely used in land, planning, municipalities, construction, geology, geology, highways, railways, oceans, water, military and many other areas. The development of surveying and mapping technology is based on the development of surveying and mapping instruments, especially the modern surveying and mapping technology, which relies on advanced surveying and mapping instruments to a great extent. With the improvement of the economic level and the development of science and technology, China’s electronics industry has been greatly developed, but also to promote the development and application of electronic measuring instruments, electronic measuring instruments occupy an increasingly important position in the electronics industry. A company in June 2019 asked our company to assist in the development of a mapping instrument battery pack, the project is a set of communication, software protection intelligent battery pack; the project has now been delivered in bulk.
Two、Product functions and main features
1. The product has the function of over-charge, over-discharge, over-current, short-circuit, over-temperature and data reading.
2. Charge display
3. SMBus communication interface
4. Adjustable parameter settings
5. Short circuit protection function
6. Integrated IC
7. Low-power, isolated power supply circuit
8. Battery status information reading
Three、Introduction to the overall programme
1.Battery parameters: using a brand imported 18650/3200mAh/3.6V battery pack
2.Finished product specifications：18650-2S2P-7.2V-6.4Ah。
3.Protection board: the parameters and schematic diagram of the smart protection board (SMBus interface communication) are as follows.
4.Assembly process: using 18650-2S2P field structure, reasonable use of space.
Protection parameters：
| No | Item | Condition | Specification |
| 1 | 過充電 Overcharge |
保護電壓/Detection voltage | 4.28±0.08V |
| 2 | 保護延遲時間/?Detection delay time | 3.0±0.5S | |
| 3 | 過充恢復 Over charge recovery |
過充恢復電壓 Over charge recovery voltage |
4.10±0.1V |
| 4 | 過放電 Over discharge |
保護電壓/Detection voltage | 2.75±0.1V |
| 5 | 保護延遲時間/?Detection delay time | ??3.0±0.5S | |
| 6 | 充電過流 Over charge current |
充電過流保護電流 Detection Over charge current |
??4.0±0.5A |
| 7 | 充電過流保護延時 charge Over current detection delay time |
???3.0±1S | |
| 8 | 放電過流 Over discharge current |
放電過流保護電流 Detection Over discharge current |
5.0±0.5A |
| 9 | 放電過流保護延時 Discharge Over current detection delay time |
?2.0±1S | |
| 10 | 過放恢復 Over discharge recovery |
過放恢復電壓 Over discharge voltage |
3.00±0.1V |
| 11 | 短路保護 | 恢復條件/Release Conditions | 斷開負載/充電激活Disconnect load/charge activation |
| 12 | 充電溫度保護 Overtemperature in Charge Protection |
充電高溫保護 Overtemperature |
65±2℃?，delay?3S |
| 解除溫度 Overtemperature?release |
45℃±5℃，delay?3S | ||
| 充電低溫保護 Undertemperature |
-5±2℃，delay?5S | ||
| 解除溫度 Overtemperature?release |
0±5℃，delay?5S | ||
| 13 | 放電溫度保護 Overtemperature in Discharge Protection |
放電高溫保護 Overtemperature |
65±3℃?，delay?3S |
| 解除溫度 Overtemperature?release |
55℃±5℃，delay5S | ||
| 放電低溫保護 Undertemperature |
-40±5℃，delay?5S | ||
| 解除溫度 Overtemperature?release |
-35±5℃，delay?5S | ||
| 14 | 建議工作條件 Suggest working conditions |
建議工作溫度/suggest working temperature | -20℃～+60℃ |
| 15 | 內阻/IR?resistance | PCM內阻/ IR of PCM | ≤50.00?mΩ |
Schematic：
Four、Product’s BOM
| NO | Item | Criteria |
| 1 | Semi-manufactured cell | ?18650?3200mAh |
| 2 | PCM | TOPAK-929/C1340/BQ40Z50R1/ 2 strings / with LED indication / FPC |
| 3 | Shell-1 | L*W*H=70*40*34MM,epithelial |
| 4 | Shell-2 | L*W*H=70*40*7.8MM，sump |
| 5 | Key | Φ*H=9*1.4MM,Round/Keypad |
| 6 | Key pads | Φ*H=12*1.5MM,C1340/Round/Key Pad |
| 7 | support | L*W*H=66.5*10.6*6.3mm,C1340，Long stand/black |
| 8 | Label | T*W*L=0.1*29.7*47.6mm/Silver/PC surface lamination, matte finish |
Five、Product size and effect display diagram
bomb map
Pictures of the finished product
Topak New Energy Technology CO.,LTD
+86 13688963831 +86-0755-23768324
B2B@topakpower.com
Address: 26 Yingfeng 1st Road, Dalang Town, Dongguan City, Guangdong Province (Tuopai Industrial Park)
Hong Kong Branch: Topak International Co.,Limited.
Company address:FLAT/RM A, 9/F SILVERCORP INTERNATIONAL TOMER 707-713 NATHAN ROAD,MONGKOK KLN KOWLOON HONG KONG
