Summary

• Page properties (2 modified, 0 added, 0 removed)

Details

Page properties

Author

...	...	@@ -1,1 +1,1 @@
1		-XWiki.Edwin
	1	+XWiki.kai

Content

...	...	@@ -55,7 +55,7 @@
55	55	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.
56	56
57	57
58		-=== 1.4.2 Can i replace battery with SPC1520? ===
	58	+=== 1.4.2 Can i replace battery without SPC1520? ===
59	59
60	60
61	61	User can replace the battery with ER26500 without SPC1520, This will work. But will have reduced performance for example
...	...	@@ -97,7 +97,7 @@
97	97	[[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"]]
98	98
99	99
100		-= 3. Solar Panel + 3000mAh Li-on battery =
	100	+= 3. Solar Panel + 3000mAh Li-ion battery =
101	101
102	102	== 3.1 Internal Structure ==
103	103
...	...	@@ -110,11 +110,12 @@
110	110	== 3.2 Battery Info ==
111	111
112	112
113		-The battery use in -LS and -NS version are 3.7v li-on rechargable battery . Dimension: 803450 x 2 , and 3000mAh capacity. The connector type is PH2.0 2 pin connector.
	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	114
115	115
116	116	== 3.3 Solar Spec ==
117	117
	118	+
118	118	* Dimension: 103 x 73 mm
119	119	* Max Power: 0.9 W
120	120	* Voltage at nominal power :5V (±5%)
...	...	@@ -122,9 +122,9 @@
122	122	* Cell efficient : 22%
123	123	* UV resistance
124	124
125		-
126	126	== 3.4 Related Document ==
127	127
	128	+
128	128	* **[[Recharge Circuit. >>https://www.dropbox.com/scl/fo/p9iqzcmivaczpmhwufj6s/h?rlkey=9zq6irrzj46ajy933ghg5uw3m&dl=0]]**
129	129
130	130	== 3.5 Recharge without Solar ==
...	...	@@ -144,6 +144,7 @@
144	144
145	145	= 4. Power Consumption Analyze =
146	146
	148	+== 4.1 Method 1: Use Our Calculate Table ==
147	147
148	148	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.
149	149
...	...	@@ -162,6 +162,43 @@
162	162	[[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"]]
163	163
164	164
	167	+== 4.2 Method 2: Manual Calcuation. ==
	168	+
	169	+=== 4.2.1 For -LB / -LS LoRaWAN models base on ASR6601 ===
	170	+
	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	+
165	165	= 5. Debug for Battery running out shortly =
166	166
167	167