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Changes for page FAQ for Batteries

Last modified by kai on 2025/05/21 18:04
From version 25.1
edited by Xiaoling
on 2024/09/26 08:48
Change comment: There is no comment for this version
To version 32.1
edited by kai
on 2025/05/21 18:02
Change comment: Uploaded new attachment "image-20250521180239-1.png", version {1}

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1 -XWiki.Xiaoling
1 +XWiki.kai
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82 82  
83 83  * [[Battery Dimension>>https://www.dropbox.com/sh/o3k9x20fv2osi3w/AAAGf2B7HcRGog8xAOPoMWPha?dl=0]]
84 84  
85 -
86 86  == 2.3 When and how to Replace Battery ==
87 87  
88 88  
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117 117  == 3.3 Solar Spec ==
118 118  
119 119  
119 +* Solar Panel: Monocrystalline Silicon
120 120  * Dimension: 103 x 73 mm
121 121  * Max Power: 0.9 W
122 122  * Voltage at nominal power :5V (±5%)
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124 124  * Cell efficient : 22%
125 125  * UV resistance
126 126  
127 -
128 -
129 129  == 3.4 Related Document ==
130 130  
131 131  
132 132  * **[[Recharge Circuit. >>https://www.dropbox.com/scl/fo/p9iqzcmivaczpmhwufj6s/h?rlkey=9zq6irrzj46ajy933ghg5uw3m&dl=0]]**
133 133  
134 -
135 -
136 136  == 3.5 Recharge without Solar ==
137 137  
138 138  
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150 150  
151 151  = 4. Power Consumption Analyze =
152 152  
149 +== 4.1 Method 1: Use Our Calculate Table ==
153 153  
154 154  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.
155 155  
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168 168  [[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"]]
169 169  
170 170  
168 +== 4.2 Method 2: Manual Calcuation. ==
169 +
170 +=== 4.2.1 For -LB / -LS LoRaWAN models base on ASR6601 ===
171 +
172 +The power consumption mainly include three parts:
173 +
174 +* 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)
175 +* Watch Dog Current: Internal Water Dog to monitor Software state: this is very small and same for each device.** for one day**: 0.003mAH
176 +* Sampling Power: The power consume to read sensor for each sampling.
177 +** 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
178 +* 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
179 +** EU868 band, TXP=0 (Max Power), DR=5 （Shortest Distance） : ~~0.0028mAh (base on 3.3v) (per transmit + receive).
180 +** EU868 band, TXP=0 (Max Power), DR=0 （Longest Distance） :  ~~0.044 mAh (base on 3.3v) (per transmit + receive).
181 +
182 +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
183 +
184 +The total power consumption is
185 +
186 +* 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
187 +* 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
188 +
189 +(((
190 +
191 +)))
192 +
193 +(% class="box warningmessage" %)
194 +(((
195 +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.
196 +)))
197 +
198 +
199 +== 4.3 Method 3: Use AI to calculate. ==
200 +
201 +=== 4.3.1 For CB version: ===
202 +
203 +For example, if you need to inquire about the battery life of the S31-CB, you can refer to the following instructions to inquire about the AI:
204 +
205 +
206 +The S31x-CB using ER26500 + SPC1520 8500mAh battery packs.
207 +
208 +~1. CB version of AI questioning techniques:
209 +
210 +Battery capacity is 8500mAh, self-discharge <2%/year
211 +Sleep current:  19.618uA
212 +Sampling current&Duration:  20mA. 10 seconds
213 +UDP Transmit/Receive Current & Duration:  58mA, 36 sec.
214 +MQTT protocol transmit current & duration:  63mA, 41 seconds
215 +TCP protocol transmit current & duration:  62mA, 41 seconds
216 +GSP positioning current & duration:  87.0756mA, 44.162 seconds
217 +Timed Acquisition Current & Duration:  8.78151mA, 0.125338s
218 +Acquisition every 120 minutes, launching once, GPS positioning once a day ,15 minutes timed acquisition once
219 +How many years can the battery be used in different transmission modes?
220 +
221 +
222 +**AI Response Results:**
223 +
224 +[[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/S31-CBS31B-CB--NB-IoTLTE-M_Temperature%26Humidity_Sensor_User_Manual/WebHome/image-20250314084804-1.png?width=557&height=1828&rev=1.1||alt="image-20250314084804-1.png"]]
225 +
226 +
227 +
228 +=== 4.3.2. For CS version: ===
229 +
230 +
231 +For example, if you need to inquire about the battery life of the S31-CS, you can refer to the following instructions to inquire about the AI:
232 +
233 +The S31x-CS uses a 3000mAh Li-Ion battery.
234 +
235 +Battery capacity is 8500mAh, self-discharge <2%/year
236 +Sleep current: 50.409uA
237 +Sampling current&Duration:  20mA. 10 seconds
238 +UDP Transmit/Receive Current & Duration:  58mA, 36 seconds.
239 +MQTT protocol transmit current & duration:  63mA, 41 seconds
240 +TCP protocol transmit current & duration:  62mA, 41 seconds
241 +GSP positioning current & duration:  87.0756mA, 44.162 seconds
242 +Timed Acquisition Current & Duration:  8.78151mA, 0.125338 seconds
243 +Acquisition every 120 minutes, launching once, GPS positioning once a day ,15 minutes timed acquisition once
244 +How many years can the battery be used in different transmission modes?
245 +
246 +**AI Response Results:**
247 +
248 +[[image:https://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/S31-CBS31B-CB--NB-IoTLTE-M_Temperature%26Humidity_Sensor_User_Manual/WebHome/image-20250314093630-2.png?width=523&height=1621&rev=1.1||alt="image-20250314093630-2.png"]]
249 +
250 +
251 +
252 +=== 4.3.3. For LB version: ===
253 +
254 +
255 +
256 +
171 171  = 5. Debug for Battery running out shortly =
172 172  
173 173  
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