Anesthesia machine is to send anesthetics into the alveoli of patients through mechanical circuit, forming the partial pressure of anesthetic gas, which will directly inhibit the central nervous system and produce the effect of general anesthesia. The anesthesia machine belongs to a semi open anesthesia device. It is mainly composed of liquid medicine tank, ether regulating switch, folding bellows, suction and expiratory one-way valve and bellows.
The backup battery of anesthesia machine requires that it can work continuously for more than 8 hours under the condition of power failure, and the cycle life is required to reach 1000 times. Our company adopts imported Sanyo battery to meet the requirements of anesthesia machine.
| Battery pack model | GLD-14.8V-4.4AH |
| Model of single battery | Sanyo lithium ion 18650 cell |
| Battery combination mode | Three in series and two in parallel |
| Cell voltage | 3.7V |
| Voltage after battery pack combination | 14.8V (3.7V / section * 8 sections) |
| Battery charge and discharge voltage range after combination | 12-16.8V |
| Cell capacity | 2200mAh |
| Battery capacity after combination | 4400mAh / section * 1 Section |
| Battery pack size | 18*66*145mm |
| Maximum discharge current | ＞2A |
| Instantaneous discharge current | ＞4A |
| Maximum charging current | ＞0.2-0.5C |
| Charge and discharge times | > 1000 times |
Lithium battery protection function of anesthesia machine
Lithium battery cell: imported Sanyo 18650 lithium ion battery cell is adopted;
Battery overcharge function: add a charger between P + and P - to charge the battery. When the voltage is charged to 16.8 ± 0.05V (it can be designed according to the requirements), the protection circuit will act and turn off the charging channel to realize overcharge protection;
Battery over discharge protection function: connect the load between P + and P - to discharge the battery. When the battery voltage drops to 12V ± 0.1V (it can be designed according to the requirements), the protection circuit will act and turn off the discharge path to realize the over discharge protection;
Short circuit protection function: when p+ and P- are short circuited, the protection circuit will act quickly within 5-50us to cut off the path and realize short-circuit protection;
Over current protection function: when the voltage between b-terminal and p-terminal reaches (0.15 ± 0.02V), the protection circuit will act quickly within 5-26ms to cut off the path and realize the over-current protection.
Temperature performance
Discharge temperature range: -10 ℃ - 60 ℃
Charging temperature range: 0 ℃ - 40 ℃
Storage temperature: 3 months: -20 ℃ - 45 ℃, 1 month: -20 ℃ - 60 ℃