CN220963605U - Maintenance-free emergency battery pack used in severe cold environment - Google Patents
Maintenance-free emergency battery pack used in severe cold environment Download PDFInfo
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- CN220963605U CN220963605U CN202322701629.6U CN202322701629U CN220963605U CN 220963605 U CN220963605 U CN 220963605U CN 202322701629 U CN202322701629 U CN 202322701629U CN 220963605 U CN220963605 U CN 220963605U
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- battery pack
- maintenance
- battery
- shell
- voltage stabilizing
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- 230000004913 activation Effects 0.000 claims abstract description 31
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 23
- GJCNZQUZWSHFHP-UHFFFAOYSA-N [Li].O=S=O Chemical compound [Li].O=S=O GJCNZQUZWSHFHP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000009413 insulation Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 2
- 239000007774 positive electrode material Substances 0.000 claims 1
- 210000002268 wool Anatomy 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 description 10
- 230000005611 electricity Effects 0.000 description 7
- 238000002161 passivation Methods 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
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- Battery Mounting, Suspending (AREA)
Abstract
The utility model discloses a maintenance-free emergency battery pack used in a severe cold environment, which comprises a shell, a heat insulation layer, a lithium sulfur dioxide battery pack arranged in the shell, and an automatic activation voltage stabilizing circuit, wherein the automatic activation voltage stabilizing circuit is arranged at one end of the shell and is arranged in the shell. The shell of the utility model provides mechanical strength and certain heat preservation performance for the battery pack; the heat insulation layer collects slight heat generated in the working process of the battery, so that the battery can work continuously; the voltage stabilizing part ensures the stability of voltage output and avoids the phenomenon of unstable output voltage; the activation part avoids the phenomenon that the hysteresis phenomenon exists after the lithium sulfur dioxide battery pack is stored for a long time and can not supply power for the voltage stabilizing component.
Description
Technical Field
The utility model relates to the field of lithium batteries, in particular to a maintenance-free emergency battery pack used in a severe cold environment.
Background
The supply of power supply energy used in high and cold environments has been a problem that is difficult to solve in high and cold environments (mountain climbing, field operations, military). In the high-cold environment, the secondary battery cannot be charged due to lack of energy supply, the low-temperature characteristic of the secondary battery determines that most of energy cannot be discharged in the high-cold environment, only small current output with maintenance property can be achieved, the self-discharge rate of the secondary battery is large, and about 15% of energy of the secondary battery is lost in general years. Therefore, it is necessary to design an emergency battery pack which is maintenance-free, suitable for long-term storage and use at any time.
Disclosure of utility model
The utility model aims to provide a maintenance-free emergency battery pack used in a severe cold environment, which can output 75% of rated energy at-40 ℃. Can maintain more than 90% of energy in 5 years under the condition of no maintenance, and is suitable for emergency high and cold environment.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
A maintenance-free emergency battery pack used in a severe cold environment comprises a shell, a heat insulation layer, a lithium sulfur dioxide battery pack arranged in the shell, and an automatic activation voltage stabilizing circuit, wherein the automatic activation voltage stabilizing circuit is arranged at one end of the shell and in the shell.
Furthermore, the lithium sulfur dioxide battery pack adopts 8 battery cells and is designed by four strings and two parallel.
Further, the battery is a cylindrical primary battery, and the internal electrode is of a winding type structure.
Further, the anode and the cathode of the battery are insulated by metal-glass-metal packaging, and have a full-sealing structure.
Further, the steel shell of the battery is made of cold-rolled nickel-plated steel plates.
Further, the battery has a working temperature range: -55 to +65℃.
Further, the heat insulation layer is EVA cotton.
Further, the automatic activation voltage stabilizing circuit comprises a connecting wire, an LED indicator lamp, an activation part, a voltage stabilizing part, a switch and a USB interface, wherein the connecting wire, the anode and the cathode are respectively connected with the anode and the cathode of the battery pack.
Further, the housing is sealed by snap fitting or ultrasonic welding.
Further, the USB interface can be connected with electric appliances such as an electric heating vest or emergency communication.
Compared with the similar prior art, the utility model has the following technical advantages:
(1) The utility model adopts an ultralow-temperature lithium sulfur dioxide battery cell as an energy source.
(2) The lithium sulfur dioxide battery cell adopts the design of an electrohydraulic purification process, so that the low hysteresis and the low capacity reduction rate of the lithium sulfur dioxide battery cell are ensured.
(3) The utility model uses EVA cotton heat insulation layer to increase the discharge stability.
(4) The utility model uses an automatic activating circuit and a 5VDCDC direct current step-down circuit, and a voltage stabilizing output circuit ensures the stability of the output voltage. The buck chip may be ETA2893, WD5030, SG1524, MP1495S, SL1581 or similar DCDC buck chip.
(5) When the switch is turned on, the battery pack is directly discharged and activated through the power resistor arranged on the automatic activation voltage stabilizing plate. After activation, the battery pack can output constant voltage through the voltage stabilizing output circuit, so that the battery pack can be in an outputtable state at any time.
(6) The utility model is convenient for USB interface design, so that the USB interface can be connected with an electric heating vest and other emergency electric equipment.
(7) The shell of the utility model provides mechanical strength and certain heat preservation performance for the battery pack; the heat insulation layer collects slight heat generated in the working process of the battery, so that the battery can work continuously; the voltage stabilizing part ensures the stability of voltage output and avoids voltage fluctuation of the electric appliance; the activation part avoids the phenomenon that the hysteresis phenomenon exists after the lithium sulfur dioxide battery pack is stored for a long time and can not supply power for the voltage stabilizing component.
Drawings
Fig. 1 is a schematic structural view of a maintenance-free emergency battery pack for use in a severe cold environment according to the present utility model;
FIG. 2 is a circuit diagram of an active portion;
FIG. 3 is a circuit diagram of a voltage stabilizing section;
FIG. 4 is a graph showing that the time t_min after the high-quality battery is connected with a resistor can be quickly recovered to be above the Threshold of the activation voltage V_threshold, and U1 judges that the battery is not passivated and controls Q2 to cut off;
FIG. 5 is a graph showing the passivation correlation of the battery when the battery voltage drops below the Threshold voltage V_threshold at time t_min after the battery is lightly delayed from the resistor access, U1;
FIG. 6 is a graph of the passivation correlation of the battery determined by U1 when the battery voltage drops below the Threshold voltage V_threshold at time t_min after the battery is turned on with a depth hysteresis;
Fig. 7 is a diagram related to the judgment of the failure of the battery activation by the U1, the control of the Q2 cut-off, and the stop of the operation of the activation circuit.
Detailed Description
As shown in fig. 1, the maintenance-free emergency battery pack used in the alpine environment comprises a shell, a heat insulation layer, a lithium sulfur dioxide battery pack arranged in the shell and an automatic activation voltage stabilizing circuit.
The lithium sulfur dioxide battery pack adopts 8 battery cells, is designed in a four-string two-parallel mode, is connected into a row, and is arranged in a shell after being covered with EVA cotton as a heat insulation layer. The automatic activation voltage stabilizing circuit comprises a connecting wire, an LED indicator lamp, an activation part (see figure 2) and a voltage stabilizing part (see figure 3), a switch and a USB interface, wherein the automatic activation voltage stabilizing circuit is arranged at one end of the shell, and the connecting wire, the anode and the cathode are respectively connected with the anode and the cathode of the battery pack. The housing is sealed by snap fitting or ultrasonic welding.
The battery is a cylindrical primary battery, an internal electrode is of a winding structure, a negative electrode active substance is metallic lithium, and a positive electrode active substance is liquid sulfur dioxide. The anode and the cathode are insulated by metal-glass-metal encapsulation, the shell is made of cold-rolled nickel-plated steel plate, and the cathode is in a fully-sealed structure. The working temperature range of the battery is as follows: -55 to +65℃.
The USB interface can be connected with electric appliances such as an electric heating vest or emergency communication.
Schematic illustration of automatic activation voltage stabilizing circuit:
1. automatic detection function: the power panel can automatically detect whether the battery is passivated or not when the power panel is started.
2. Activating the 0V voltage: when the passivation battery is activated, the power panel can still reliably operate when the activation voltage is as low as 0V.
3. Control point: important control points and parameters of the power panel are
1. The Threshold voltage V_Threshold is activated, and the low-power-consumption three-terminal voltage comparison IC: u1 is set.
2. The shortest activation and test time t_min is set by the C3 charge time.
3. The maximum activation limit time t_max is set by the C1C 2 discharge time.
4. Control principle:
The control point V_threshold t_min t_max constructs a rectangular Threshold activation working area, and batteries under different working conditions are controlled in the range.
When the switch is in the OFF position, the battery charges the C1C 2 as a power strip backup power source.
When the switch is in the ON position, Q2 is firstly conducted, and the activating/testing resistors R1-R8 are connected to the battery terminal:
1. and the high-quality battery can be quickly recovered to be above the Threshold value of the activation voltage V_threshold within the time t_min after the high-quality battery is connected with the resistor, and U1 judges that the battery is not passivated and controls Q2 to be cut off, as shown in figure 4.
Turning quickly to the normal operating mode, the ETA 2893U 1 DC-DC5V circuit operates to provide a steady DC5V power supply to the user load.
2. In the time t_min after the battery is slightly or deeply lagged to be connected with the resistor, the voltage of the battery is reduced to be lower than the Threshold voltage V_threshold, and U1 judges that the battery is passivated, as shown in fig. 5 and fig. 6.
The control activation resistor continues to operate for a maximum activation limit time t _ max, if the passivated cell can be activated within a time period of t _ min-t _ max, and the voltage is higher than the Threshold voltage V _ Threshold,
And U1 judges that the battery is activated, and controls Q2 to be cut off. Turning to the normal mode of operation, the ETA 2893U 1 DC-DC5V circuit operates to provide a steady DC5V supply to the consumer load.
3. In the time t_min after the depth lag can not activate the battery to be connected with the resistor, the voltage of the battery is reduced to be lower than the Threshold voltage V_threshold, U1 judges that the battery has passivation,
U1 controls the activation resistor to continue to operate for the longest activation limit time t _ max, if the passivated battery cannot be activated within the time period t _ min-t _ max, the voltage is lower than the Threshold voltage V _ Threshold,
Then U1 determines that the battery has failed to activate, controls Q2 to shut off, and the circuit board stops operating as shown in fig. 7.
The new electricity of the single cell and the capacity comparison of the storage cell at normal temperature and low temperature are shown in table 1.
Table 1 cell fresh electricity and stored battery normal temperature, low temperature capacity comparison table
| Single-section WR18700 battery cell | Normal temperature capacity (mAh) | -30 ℃ Low temperature capacity (mAh) |
| New electricity | 2660.5 | 2012.2 |
| Stored for one year | 2567.4 | 1935.7 |
| Stored for two years | 2546.8 | 1918.4 |
| Stored for five years | 2523.9 | 1903.0 |
The single-section WR18700 cell has long storage time, and the energy loss rate is not more than 10% in the storage period of 5 years. Can be activated at any time.
The new electricity of the emergency battery pack and the discharge time and energy of the storage battery at normal temperature and low temperature are compared with each other in the table 2.
Table 2 emergency battery pack new electricity and stored battery normal temperature, low temperature discharge time and energy comparison table
| Discharge mode | Discharge time | Discharge energy | |
| 4WR18700-2 new electricity | Constant power of 10W at 25 DEG C | 5.3h | 53Wh |
| 4WR18700-2 new electricity | 5W constant power at-40 DEG C | 8.2h | 41Wh |
| 4WR18700-2 three years | Constant power of 10W at 25 DEG C | 4.9h | 49Wh |
| 4WR18700-2 five years | Constant power of 10W at 25 DEG C | 4.8h | 48Wh |
As can be seen from table 2: the battery pack can output 75% of rated energy at the temperature of minus 40 ℃ and 75% of energy in the environment of minus 40 ℃; can maintain more than 90% of energy in 5 years under the condition of no maintenance, and is suitable for emergency high and cold environment.
Claims (10)
1. The maintenance-free emergency battery pack used in the alpine environment is characterized by comprising a shell, a heat insulation layer, a lithium sulfur dioxide battery pack arranged in the shell, and an automatic activation voltage stabilizing circuit, wherein the automatic activation voltage stabilizing circuit is arranged at one end of the shell and in the shell.
2. The maintenance-free emergency battery pack for use in high and cold environments according to claim 1, wherein the lithium sulfur dioxide battery pack is designed by adopting 8 battery cells in four series two parallel.
3. The maintenance-free emergency battery pack for use in high and cold environments according to claim 2, wherein the battery is a cylindrical primary battery, the internal electrode is of a winding type structure, and the positive active material is sulfur dioxide.
4. The maintenance-free emergency battery pack for use in high and cold environments according to claim 2, wherein the positive and negative poles of the battery are isolated by metal-glass-metal packaging, and are of a fully sealed structure.
5. The maintenance-free emergency battery pack for use in high and cold environments according to claim 2, wherein the battery case is made of cold-rolled nickel-plated steel sheet.
6. A maintenance-free emergency battery pack for use in a high and cold environment according to claim 3, wherein the battery has an operating temperature range of: -55 to +65℃.
7. The maintenance-free emergency battery pack for use in high and cold environments according to claim 1, wherein the heat insulating layer is EVA wool.
8. The maintenance-free emergency battery pack used in the alpine environment according to claim 1, wherein the automatic activation voltage stabilizing circuit comprises a connecting wire, an LED indicator lamp, an activation part, a voltage stabilizing part, a switch and a USB interface, and the connecting wire, the anode and the cathode are respectively connected with the anode and the cathode of the battery pack.
9. The maintenance-free emergency battery pack for use in high and cold environments according to claim 1, wherein the housing is sealed by snap-fit or ultrasonic welding.
10. The maintenance-free emergency battery pack for use in high and cold environments according to claim 8, wherein the USB interface comprises an electric vest or an emergency communication electrical appliance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322701629.6U CN220963605U (en) | 2023-10-09 | 2023-10-09 | Maintenance-free emergency battery pack used in severe cold environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322701629.6U CN220963605U (en) | 2023-10-09 | 2023-10-09 | Maintenance-free emergency battery pack used in severe cold environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220963605U true CN220963605U (en) | 2024-05-14 |
Family
ID=91006538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322701629.6U Active CN220963605U (en) | 2023-10-09 | 2023-10-09 | Maintenance-free emergency battery pack used in severe cold environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220963605U (en) |
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2023
- 2023-10-09 CN CN202322701629.6U patent/CN220963605U/en active Active
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