Changes for page FAQ for Batteries

Last modified by kai on 2025/03/24 10:10
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From version < 15.1 >
edited by Edwin Chen
on 2023/12/20 23:30
To version < 27.1 >
edited by kai
on 2025/03/21 16:24
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1 +XWiki.kai
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51 51  
52 52  === 1.4.1 Can i use send uplink in short period? ===
53 53  
54 +
54 54  The Li-SICO battery is designed for small current / long period application. It is not good to use a high current, short period transmit method. The recommended minimum period for use of this battery is 5 minutes. If you use a shorter period time to transmit LoRa or NB-IoT, then the battery life may be decreased.
55 55  
56 56  
57 -=== 1.4.2 Can i replace battery with SPC1520? ===
58 +=== 1.4.2 Can i replace battery without SPC1520? ===
58 58  
60 +
59 59  User can replace the battery with ER26500 without SPC1520, This will work. But will have reduced performance for example
60 60  
61 61  1) Shorter Battery Life.
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95 95  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N-E5%20LoRaWAN%20Temperature_Humidity%20%26%20Illuminance%20Sensor%20User%20Manual/WebHome/image-20220515075440-2.png?width=272&height=338&rev=1.1||alt="image-20220515075440-2.png" height="338" width="272"]]
96 96  
97 97  
98 -= 3. Power Consumption Analyze =
100 += 3. Solar Panel + 3000mAh Li-ion battery =
99 99  
102 +== 3.1 Internal Structure ==
100 100  
104 +
105 +Below are the Internal Power Structure for -LS and -NS version.
106 +
107 +[[image:image-20231231200632-1.png||height="479" width="933"]]
108 +
109 +
110 +== 3.2 Battery Info ==
111 +
112 +
113 +The battery use in -LS and -NS version are 3.7v Li-ion rechargable battery . Dimension: 803450 x 2 , and 3000mAh capacity. The connector type is PH2.0 2 pin connector.
114 +
115 +
116 +== 3.3 Solar Spec ==
117 +
118 +
119 +* Dimension: 103 x 73 mm
120 +* Max Power: 0.9 W
121 +* Voltage at nominal power :5V (±5%)
122 +* Current at nominal power: 180mA (±5%)
123 +* Cell efficient : 22%
124 +* UV resistance
125 +
126 +== 3.4 Related Document ==
127 +
128 +
129 +* **[[Recharge Circuit. >>https://www.dropbox.com/scl/fo/p9iqzcmivaczpmhwufj6s/h?rlkey=9zq6irrzj46ajy933ghg5uw3m&dl=0]]**
130 +
131 +== 3.5 Recharge without Solar ==
132 +
133 +
134 +If user wants to recharge the battery without Solar Panel. Below are the steps
135 +
136 +a) Remove the 6v input from solar panel.
137 +
138 +[[image:image-20240109233955-1.png||height="234" width="593"]]
139 +
140 +
141 +b) Provide voltage to this connector(XHB2.54-2P) to recharge the battery. (Input Range: DC: 5~~12v)
142 +
143 +[[image:image-20240110091157-1.png||height="307" width="599"]]
144 +
145 +
146 += 4. Power Consumption Analyze =
147 +
148 +== 4.1 Method 1: Use Our Calculate Table ==
149 +
101 101  Dragino Battery powered product are all runs in Low Power mode. We have an update battery calculator which base on the measurement of the real device. User can use this calculator to check the battery life and calculate the battery life if want to use different transmit interval.
102 102  
103 103  (% style="color:blue" %)**Instruction to use as below:**
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115 115  [[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual/WebHome/1675146895108-304.png?rev=1.1||alt="1675146895108-304.png"]]
116 116  
117 117  
118 -= 4. Debug for Battery running out shortly =
167 +== 4.2 Method 2: Manual Calcuation. ==
119 119  
169 +=== 4.2.1 For -LB / -LS LoRaWAN models base on ASR6601 ===
120 120  
171 +The power consumption mainly include three parts:
172 +
173 +* Sleep Power  : Most time the CPU are in sleep mode. It is around 6uA, So **for one day**, total power consumption: 6uA x 24(hour) = 144 uAh = 0.144mAh (base on batter output voltage)
174 +* Watch Dog Current: Internal Water Dog to monitor Software state: this is very small and same for each device.** for one day**: 0.003mAH
175 +* Sampling Power: The power consume to read sensor for each sampling.
176 +** Example, SN50v3-LB connect to an external sensor, each reading need to use 5V , and sensor require current 10mA and 2 seconds. So each sampling need 10mA x 2 seconds / 3600 = 0.0056mAh ( base on 5v). Assume 90% converter rate from 3.3v to 5v) , we can consider the mAh in 3.3v is 0.0056mAh/90% = **0.0062mAh per sampling**. If one day, SN50v3-LB read this sensor 3 times every hour. So **for one day**, the total power consumption is 0.0062mAh x 3 x 24 = 0.4464 mAh
177 +* Transmit & Receive Power: this power consumption depends on the transmit power and the data rate (DR) settings. They are the same for all -LB and -LS series. Below are the reference
178 +** EU868 band, TXP=0 (Max Power), DR=5 （Shortest Distance） : ~~0.0028mAh (base on 3.3v) (per transmit + receive).
179 +** EU868 band, TXP=0 (Max Power), DR=0 （Longest Distance） :  ~~0.044 mAh (base on 3.3v) (per transmit + receive).
180 +
181 +So for SN50v3 with above sensor, we set 5V output to open 2 seconds every reading and set TDC = 20 minutes. So 72 reading and transmit every day
182 +
183 +The total power consumption is
184 +
185 +* EU868 , Good Signal : 0.144mAh + 0.003mAh + 0.0062mAh * 72 + 0.0028 mAh * 72 = 0.795 mAh per day. For the 8500mAh , if we consider 20% margin, we can use 8500mAh x 80% / 0.795mAh = 8553 days
186 +* EU868 , Poor Signal: 0.144mAh + 0.003mAh + 0.0062mAh * 72 + 0.044 mAh * 72 = 3.7614 mAh per day, For the 8500mAh, if we consider 20% margin, we can use 8500mAh x 80% / 3.7614 mAh = 1807 days
187 +
188 +(((
189 +
190 +)))
191 +
192 +(% class="box warningmessage" %)
193 +(((
194 +Notice, actually deployment situation is more complicate and above calcualtion is base on lab. The calculation is only for reference. It doesn't response for the promising battery life.
195 +)))
196 +
197 +
198 +== 4.3 Method 3: Use AI to calculate. ==
199 +
200 +
201 +
202 +
203 +
204 += 5. Debug for Battery running out shortly =
205 +
206 +
121 121  Below factors will affect the battery life. If the battery runs out very fast unexpectedly. Please check below points:
122 122  
123 123  1. Did you connect an external sensor? What is the power consumption of this sensor?
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128 128  User can also send us (support(at)dragino.com) record so check. a record like below with the info:** Battery**, **uplink time**, **DR**.
129 129  
130 130  [[image:image-20230418000422-1.png]]
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