Skip to Content

Wiki source code of FAQ for Batteries

Version 26.1 by Edwin Chen on 2024/10/11 12:38
Show last authors
1 (% class="wikigeneratedid" %)
2 **Table of Contents:**
3
4 {{toc/}}
5
6
7
8
9 = 1. ER26500 + SPC1520 Battery Pack =
10
11 == 1.1 Battery Info ==
12
13
14 [[ER26500 + SPC1520 battery pack>>https://www.dropbox.com/sh/w9l2oa3ytpculph/AAAPtt-apH4lYfCj-2Y6lHvQa?dl=0]] is un-rechargeable Li-SOCl2 battery with 8500mAh and low discharge rate targeting for 8~~10 years use. This type of battery is commonly used in IoT target for long-term running, such as water meter. Dragino outdoor sensor models use this type of battery widely.
15
16
17 == 1.2 Battery Document ==
18
19
20 (% style="color:blue" %)**The battery related documents as below:**
21
22 * [[Battery Dimension>>url:https://www.dropbox.com/s/ox5g9njwjle7aw3/LSN50-Battery-Dimension.pdf?dl=0]]
23
24 * [[Lithium-Thionyl Chloride Battery datasheet, Tech Spec>>url:https://www.dropbox.com/sh/d4oyfnp8o94180o/AABQewCNSh5GPeQH86UxRgQQa?dl=0]]
25
26 * [[Lithium-ion Battery-Capacitor datasheet>>url:https://www.dropbox.com/s/791gjes2lcbfi1p/SPC_1520_datasheet.jpg?dl=0]], [[Tech Spec>>url:https://www.dropbox.com/s/4pkepr9qqqvtzf2/SPC1520%20Technical%20Specification20171123.pdf?dl=0]]
27
28 * [[Battery Report & Certificate>>https://www.dropbox.com/sh/w9l2oa3ytpculph/AAAPtt-apH4lYfCj-2Y6lHvQa?dl=0]]
29
30 (% style="color:blue" %)**Connector Type:**
31
32 [[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/image-20230131145708-3.png?rev=1.1||alt="image-20230131145708-3.png"]]
33
34
35 == 1.3 When and how to Replace Battery ==
36
37
38 The discharge curve of ER26500 is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
39
40 [[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/1675146710956-626.png?rev=1.1||alt="1675146710956-626.png"]]
41
42
43 If we see the battery lower than 2.7v, it is time to replace battery.
44
45 Any battery with range 2.7 ~~ 3.6v can be a replacement. We recommend using Li-SOCl2 Battery. It is suggest to add SPC1520 super capacitor with the ER26500 battery,The SPC can enlarge the battery life for high frequency use (update period below 5 minutes).  If user can't find such capacitor, he can take out from old battery and add to ER26500 one.
46
47 Make sure the positive and negative pins match.
48
49
50 == 1.4 Other Notice ==
51
52 === 1.4.1 Can i use send uplink in short period? ===
53
54
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
57
58 === 1.4.2 Can i replace battery without SPC1520? ===
59
60
61 User can replace the battery with ER26500 without SPC1520, This will work. But will have reduced performance for example
62
63 1) Shorter Battery Life.
64
65 2) Not enough to provide enough current burst in low temperature.
66
67
68 = 2. CR17450 Battery =
69
70 == 2.1 Battery Info ==
71
72
73 CR17450 is an un-rechargeable Li-MnO2 battery with 2400mAh and low discharge rate targeting for 8~~10 years use. This type of battery is commonly used in IoT target for long-term running, such as water meter. Dragino outdoor sensor models use this type of battery widely.
74
75
76 == 2.2 Battery Document ==
77
78
79 [[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-20220515075625-3.png?width=257&height=193&rev=1.1||alt="image-20220515075625-3.png" height="193" width="257"]]
80
81 (% style="color:blue" %)**The battery related documents as below:**
82
83 * [[Battery Dimension>>https://www.dropbox.com/sh/o3k9x20fv2osi3w/AAAGf2B7HcRGog8xAOPoMWPha?dl=0]]
84
85 == 2.3 When and how to Replace Battery ==
86
87
88 The discharge curve of CR17450 is not linear so can't simply use percentage to show the battery level. Below is the battery performance.
89
90 [[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-20220515075034-1.png?width=644&height=208&rev=1.1||alt="image-20220515075034-1.png" height="208" width="644"]]
91
92
93 If we see the battery lower than 2.7v, it is time to replace battery.
94
95 CR17450 is a general type battery. User is easy to find online via Aliexpress, Amazon , Ebay etc. Below shows how to replace it in LHT65N, unscrew the screws and replace will be ok.
96
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
99
100 = 3. Solar Panel + 3000mAh Li-ion battery =
101
102 == 3.1 Internal Structure ==
103
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
127 == 3.4 Related Document ==
128
129
130 * **[[Recharge Circuit. >>https://www.dropbox.com/scl/fo/p9iqzcmivaczpmhwufj6s/h?rlkey=9zq6irrzj46ajy933ghg5uw3m&dl=0]]**
131
132
133 == 3.5 Recharge without Solar ==
134
135
136 If user wants to recharge the battery without Solar Panel. Below are the steps
137
138 a) Remove the 6v input from solar panel.
139
140 [[image:image-20240109233955-1.png||height="234" width="593"]]
141
142
143 b) Provide voltage to this connector(XHB2.54-2P) to recharge the battery. (Input Range: DC: 5~~12v)
144
145 [[image:image-20240110091157-1.png||height="307" width="599"]]
146
147
148 = 4. Power Consumption Analyze =
149
150 == 4.1 Method 1: Use Our Calculate Table ==
151
152 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.
153
154 (% style="color:blue" %)**Instruction to use as below:**
155
156 (% style="color:#037691" %)**Step 1:**(%%) Downlink the up-to-date DRAGINO_Battery_Life_Prediction_Table.xlsx from: [[https:~~/~~/www.dropbox.com/sh/zwex6i331j5oeq2/AACIMf9f_v2qsJ39CuMQ5Py_a?dl=0>>https://www.dropbox.com/sh/zwex6i331j5oeq2/AACIMf9f_v2qsJ39CuMQ5Py_a?dl=0]]
157
158 (% style="color:#037691" %)**Step 2:**(%%) Open it and choose
159
160 * Product Model
161 * Uplink Interval
162 * Working Mode
163
164 And the Life expectation in difference case will be shown on the right.
165
166 [[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"]]
167
168
169 == 4.2 Method 2: Manual Calcuation. ==
170
171 === 4.2.1 For -LB / -LS LoRaWAN models base on ASR6601 ===
172
173 The power consumption mainly include three parts:
174
175 * 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)
176 * Watch Dog Current: Internal Water Dog to monitor Software state: this is very small and same for each device.** for one day**: 0.003mAH
177 * Sampling Power: The power consume to read sensor for each sampling.
178 ** 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
179 * 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
180 ** EU868 band, TXP=0 (Max Power), DR=5 （Shortest Distance） : ~~0.0028mAh (base on 3.3v) (per transmit + receive).
181 ** EU868 band, TXP=0 (Max Power), DR=0 （Longest Distance） :  ~~0.044 mAh (base on 3.3v) (per transmit + receive).
182
183
184 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
185
186 The total power consumption is
187
188 * 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
189 * 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
190
191 (((
192
193 )))
194
195 (% class="box warningmessage" %)
196 (((
197 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.
198 )))
199
200
201 = 5. Debug for Battery running out shortly =
202
203
204 Below factors will affect the battery life. If the battery runs out very fast unexpectedly. Please check below points:
205
206 1. Did you connect an external sensor? What is the power consumption of this sensor?
207 1. What is the (% style="color:blue" %)**uplink period**(%%) of the end node?
208 1. What is the (% style="color:blue" %)**DataRate**(%%) the sensor used to uplink?
209 1. Does the sensor sends re-transmit too oftern? See [[**this link**>>http://wiki.dragino.com/xwiki/bin/view/Main/Notes%20for%20ChirpStack/#H7.A0MultiplyUplinkinChirpStack]] for a possible issue with LoRaWAN server.
210
211 User can also send us (support(at)dragino.com) record so check. a record like below with the info:** Battery**, **uplink time**, **DR**.
212
213 [[image:image-20230418000422-1.png]]
214
215