CN204613365U - A kind of portable storage battery service life tester - Google Patents
A kind of portable storage battery service life tester Download PDFInfo
- Publication number
- CN204613365U CN204613365U CN201520193000.8U CN201520193000U CN204613365U CN 204613365 U CN204613365 U CN 204613365U CN 201520193000 U CN201520193000 U CN 201520193000U CN 204613365 U CN204613365 U CN 204613365U
- Authority
- CN
- China
- Prior art keywords
- cabinet
- heat sink
- circuit
- main control
- panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Secondary Cells (AREA)
Abstract
The utility model discloses portable storage battery service life tester, measuring ability, discharging function and self-powered function are provided, by cabinet, air channel and circuit design, not only realize the convenience of carrying, and the normal operation of instrument can be ensured.This detector comprises cabinet, main control board, p-wire and power lead; The shell of cabinet is made up of heat sink, cabinet Left-Hand Panel, cabinet right panel, cabinet panel and base plate after heat sink, cabinet before cabinet; End face fastening frame, bottom surface corner seat frame and 4 locking crossbeams are utilized to realize the reinforcing of shell.Cabinet inside installs insulation liner plate, heat radiator, mainboard secure liner plate from bottom to top successively, and mainboard secure liner plate upper surface installs main control board and internal cell.Heat radiator adopts hierarchical design, and multiple fan all installed by front and back heat sink, and position of fan is corresponding with heat radiator position, thus realizes preferably radiating effect.This detector, by internal battery powers, realizes self-powered, is applicable to various occasion.
Description
Technical field
The present invention relates to a kind of portable storage battery service life tester.
Background technology
Accumulator in use for some time, the even exhaustion of its life time decay.How to judge that can accumulator use in crucial moment, residual life also has how many, needs the evaluation and test carrying out being correlated with.For this reason, need to provide a kind of life of storage battery detector, various occasion is applicable in order to make it, especially be not easy to the occasion providing electric power, this life of storage battery detector not only needs to have measuring ability, discharging function, also needs to be easy to carry, self-powered, and the heat produced owing to discharging is comparatively large, therefore needs to design air channel, makes instrument normally to run.
Summary of the invention
In view of this, the invention provides a kind of portable storage battery service life tester, measuring ability, discharging function and self-powered function are provided, by cabinet, air channel and circuit design, not only realize the convenience of carrying, and the normal operation of instrument can be ensured.
For solving the problems of the technologies described above, the concrete technical scheme of the present invention is as follows:
A kind of portable storage battery service life tester, comprises cabinet, main control board, p-wire and power lead; The shell of cabinet is made up of heat sink, cabinet Left-Hand Panel, cabinet right panel, cabinet panel and base plate after heat sink, cabinet before cabinet; End face fastening frame snaps onto cabinet panel surrounding and the top of heat sink after heat sink and cabinet before blocking cabinet from outside; Bottom surface corner seat frame snaps onto base plate surrounding and before blocking cabinet from outside after heat sink and cabinet bottom heat sink; Article two, lock crossbeam and the top of heat sink after heat sink before cabinet and cabinet is lock onto end face fastening frame inside surface, the bottom of heat sink after heat sink before cabinet and cabinet is lock onto bottom surface corner seat frame inside surface by two other locking crossbeam; Before cabinet, after heat sink and cabinet, the middle part of heat sink all laterally offers 3 air vents, and each disposed at air vent installs a quiet fan; Casing also has electric source line interface;
At cabinet inside, insulation liner plate is installed on the upside of base plate, mainboard secure liner plate is installed above insulation liner plate; Arrange heat radiator in space between insulation liner plate and mainboard secure liner plate, 4 heat radiator one group of composition strip radiating areas between two, and point two-layer layout, leave gap between two-layer heat radiator; The position of heat radiator is relative with vent locations, and the frontage and airiness hole, backlash direction of heat radiator; Electric discharge chip in main control board is drawn by circuit and is distributed on each heat radiator;
On the upside of mainboard secure liner plate, main control board and internal cell are installed; Cabinet panel is fitted through the display screen of circuit access main control board, button, accumulator anode and cathode plug, switch, temperature test line interface and communication interface;
Described p-wire comprises battery positive voltage connecting line, battery terminal negative connecting line, and end is the temperature test line of temperature sensor.
Preferably, before described cabinet, after heat sink and cabinet, heat sink is U-shaped structure, and the two-arm of U-shaped structure offers louvre, and brachium is less than the half of cabinet Left-Hand Panel, cabinet right panel; Before cabinet, heat sink is relative with the U-shaped structural openings of heat sink after cabinet, also leaves gap between opening; Have the inner side that the cabinet Left-Hand Panel of louvre and cabinet right panel are installed on U-shaped structure two-arm equally; Cabinet Left-Hand Panel is installed side handle, this side handle exposes outside by the gap of heat sink after heat sink before cabinet and cabinet; The leaving certain gaps uncovered by the economic plan of cabinet right panel, electric source line interface is arranged on the left side wall of heat sink after cabinet, is stretched out in outside cabinet by described breach.
Preferably, described main control board comprises main control chip, A/D convertor circuit, voltage collection circuit, memory circuit, voltage conversion circuit, constant-current discharge circuit, communicating circuit and charge management circuit;
Accumulator anode and cathode plug connects voltage collection circuit and the discharge loop accessed in constant-current discharge unit; Voltage collection circuit connects main control chip by A/D convertor circuit; Main control chip connects memory circuit, constant-current control circuit, communicating circuit, also connects temperature test line interface on cabinet panel and described display screen and described button; Described electric source line interface connects described internal cell by charge management circuit, and internal cell connects voltage conversion circuit, and the voltage that voltage conversion circuit provides internal cell boosts, the electricity consumption device be supplied to after step-down process on main control board; Communicating circuit is connected with the communication interface on cabinet panel.
Preferably, described constant-current discharge circuit comprises control module and 8 discharge modules; Be divided into 8 tunnels to enter 8 discharge modules from the electric signal of the tested accumulator of accumulator anode and cathode plug introducing, each discharge module adopts a metal-oxide-semiconductor as electric discharge chip, so each heat radiator is pasted 2 metal-oxide-semiconductors; Main control chip accesses the discharge current in described control module controlled discharge loop, and main control chip also gathers the actual discharge electric current of discharge module, carries out constant-current discharge control.
Preferably, current-limiting circuit is provided with in described charge management circuit.
Preferably, be provided with relay switch in described charge management circuit, the input and output of relay switch connect the charging voltage delivery outlet of internal cell and charge management circuit respectively; The control end of relay switch connects main control chip.
Preferably, cabinet panel is provided with SD card slot further, this SD card slot connects main control board at cabinet inside.
Preferably, described A/D convertor circuit selects model to be 16 bit A/D converters of ADS8344.
Preferably, installation front, described end face fastening frame both sides handle.
Beneficial effect:
The present invention can provide measuring ability, discharging function and self-powered function.By cabinet, air channel and circuit design, not only realize the convenience of carrying, and the normal operation of instrument can be ensured.
Accompanying drawing explanation
Fig. 1 (a) is the one-piece construction schematic diagram of portable storage battery service life tester of the present invention;
Fig. 1 (b) is the fractionation structural representation of portable storage battery service life tester of the present invention;
Fig. 2 is the circuit composition of main control board 29 in portable storage battery service life tester of the present invention;
Fig. 3 is the circuit realiration of constant-current discharge unit;
Fig. 4 is negative pressure circuit.
Embodiment
Below with reference to accompanying drawings embodiments of the invention are described.
Portable storage battery service life tester of the present invention comprises three parts: structure division, circuit part and external circuit part.Wherein structure division comprises casing structure and inner structure thereof; Circuit part is mainly concerned with main control board; External circuit part comprises p-wire and power lead.
The structure division schematic diagram that Fig. 1 (a) and Fig. 1 (b) is portable storage battery service life tester.As shown in Figure 1, the shell of cabinet is made up of 6, front, back, left, right, up, down lateral surface, is respectively: before cabinet, after heat sink 32, cabinet, heat sink 33, cabinet Left-Hand Panel 24, cabinet right panel 25, cabinet panel 29 and base plate 1 form.
The upper and lower edge of cabinet adopts fastening frame to fix.Wherein, end face fastening frame 34 snaps onto cabinet panel 29 surrounding and the top of heat sink 33 after heat sink 32 and cabinet before blocking cabinet from outside, installation front, end face fastening frame 34 both sides handle 35,36; Bottom surface corner seat frame 31 snapping base plate 1 surrounding before blocking cabinet from outside after heat sink 32 and cabinet bottom heat sink 33; Article two, lock crossbeam 3,27 lock onto end face fastening frame 34 from inside by the top of heat sink 33 after heat sink before cabinet 32 and cabinet, two other locking crossbeam 2,26 lock onto bottom surface corner seat frame 31 from inside by the bottom of heat sink 33 after heat sink before cabinet 32 and cabinet.Before cabinet, after heat sink 32 and cabinet, the middle part of heat sink 33 all laterally offers 3 air vents, and each disposed at air vent installs a quiet fan 13,14,15,16,17,18.
At cabinet inside, insulation liner plate 4 is installed on the upside of base plate 1, mainboard secure liner plate 23 is installed above insulation liner plate 4.Arrange heat radiator in space between insulation liner plate 4 and mainboard secure liner plate 23,4 heat radiator 5,6,11,12 one group of composition strip radiating areas between two, and point two-layer layout, thus can space be saved, reduce cabinet volume.Gap is left, to dispel the heat between two-layer heat radiator.Two-layer heat radiator can be together in series by screw rod, is fixed between insulation liner plate 4 and mainboard secure liner plate 23, and the set nut on screw rod is used for the position of fixing cooling fins.
The position of heat radiator is relative with vent locations, and the frontage and airiness hole, backlash direction of heat radiator, thus form air channel, strengthen radiating effect.Electric discharge chip 7,8,9,10,19,20,21,22 in main control board is drawn by circuit and is distributed on each heat radiator.In the present embodiment, have 8 electric discharge chips, each heat radiator arranges 2.
Main control board 29 and internal cell 30 are installed on the upside of mainboard secure liner plate 23.Cabinet panel 29 is installed display screen 37, button, accumulator anode and cathode plug, switch, temperature test line interface and communication interface, and all by circuit access main control board 29.
P-wire comprises battery positive voltage connecting line, battery terminal negative connecting line, also comprises the temperature test line that end is temperature sensor.Wherein, temperature test line can testing environment temperature and battery temperature, for the detection computations of main control chip provides temperature information, utilizes this temperature information to realize the operations such as Data correction.
Conveniently install, before cabinet, after heat sink 32 and cabinet, heat sink 33 is U-shaped structure, U-shaped base is the one side offering air vent, two side arms offers louvre, the length of a side arm is less than the half of cabinet Left-Hand Panel 24 and cabinet right panel 25, so before cabinet, heat sink 32 is relative with the U-shaped structural openings of heat sink after cabinet 33, between leave gap.Cabinet Left-Hand Panel 24 and cabinet right panel 25 also have louvre, are installed on the inner side of U-shaped structure two-arm.Cabinet Left-Hand Panel 24 is installed side handle, exposed outside by the gap of heat sink 33 after heat sink before cabinet 32 and cabinet.Casing also has electric source line interface.In the present embodiment, electric source line interface is stretched out in outside cabinet by this breach.
Fig. 2 is the circuit composition of main control board 29 in portable storage battery service life tester of the present invention.As shown in Figure 2, this main control board 29 comprises main control chip, A/D convertor circuit, voltage collection circuit, memory circuit, voltage conversion circuit, constant-current discharge circuit, communicating circuit, charge management circuit.
Accumulator anode and cathode plug connects voltage collection circuit and the discharge loop accessed in constant-current discharge unit; Voltage collection circuit connects main control chip by A/D convertor circuit; Main control chip connects memory circuit, constant-current control circuit, communicating circuit, also connects temperature test line interface on cabinet panel 29 and display screen and button.Electric source line interface in cabinet right panel 25 connects internal cell 30 by charge management circuit, internal cell 30 connects voltage conversion circuit, and the voltage that voltage conversion circuit provides internal cell boosts, the electricity consumption device be supplied to after step-down process on main control board 29.Communicating circuit is connected with the communication interface on cabinet panel 29.
Wherein, test battery voltage transitions, by 1/20 dividing potential drop, is the voltage within 5V, delivers to A/D convertor circuit input port by voltage collection circuit, via the calculating and the life-span judgement that send to main control chip to carry out relevant parameter after A/D convertor circuit process.A/D convertor circuit selects 16 bit A/D converters of model ADS8344
Memory circuit, passes through I
2main control chip data are stored in storage chip by C communication, can call at any time when demanding data.The model for carrying out life-span calculating and required parameter preset is also stored in this storage chip.
Big current is divided into 8 tunnels to discharge by constant-current discharge unit.It comprises control module and 8 discharge modules; Be divided into 8 tunnels to enter 8 discharge modules from the electric signal of the tested accumulator of accumulator anode and cathode plug introducing, each discharge module adopts a metal-oxide-semiconductor as electric discharge chip, so each heat radiator is pasted 2 metal-oxide-semiconductors.Main control chip accesses described control module, by adjusting the resistance of discharge loop, realizing discharge current and controlling.Main control chip gathers the actual discharge electric current of discharge module, thus forms the closed-loop control of discharge loop, realizes constant-current discharge.Fig. 3 is the circuit realiration of constant-current discharge unit, and Fig. 3 merely illustrates control module (in figure the first half) and a road discharge module (in figure the latter half), and as shown in Figure 3, this main control chip is VREF to the control end of constant-current discharge module.In order to avoid indeterminacy phenomenon appears in discharge loop, the present embodiment further at VREF place access negative pressure circuit as shown in Figure 4, thus prevents spark phenomenon.
Charge management circuit utilizes cabinet external power source for the charging of cabinet inside battery, preferably, and its built-in current limliting module, thus avoid external power source to the damage of internal cell.Further, in charge management circuit, arrange relay switch, the input and output of relay switch connect the charging voltage delivery outlet of internal cell 30 and charge management circuit respectively; The control end of relay switch connects main control chip.When main control chip detects access external charging power supply, by relay closes, thus open charge tunnel, when detecting that external charging power supply disconnects, relay is disconnected, thus disconnect charge tunnel, thus prevent battery in charging process from externally discharging.
The voltage that internal cell provides by voltage conversion circuit, by boosting, step-down process, obtains 12V, 5V voltage, is supplied to cabinet inside electricity consumption device and powers, guarantee the normal work of instrument.
Display screen is connected with main control chip by circuit with button, when main control chip detects and do not carry out any operation to instrument in 5 minutes, the backlight of display screen is closed, to save electric power.
Preferably, cabinet panel 29 can also offer SD card slot, this SD card slot connects cabinet internal main control circuit plate 29, thus is convenient to from instrument copies data.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a portable storage battery service life tester, is characterized in that, comprises cabinet, main control board, p-wire and power lead; The shell of cabinet is made up of heat sink (33), cabinet Left-Hand Panel (24), cabinet right panel (25), cabinet panel (29) and base plate (1) after heat sink before cabinet (32), cabinet; End face fastening frame (34) snaps onto cabinet panel (29) surrounding and the top of heat sink (33) after heat sink (32) and cabinet before blocking cabinet from outside; Bottom surface corner seat frame (31) snaps onto base plate (1) surrounding and heat sink (33) bottom after heat sink (32) and cabinet before blocking cabinet from outside; Article two, lock crossbeam (3,27) top of heat sink (33) after heat sink before cabinet (32) and cabinet is lock onto end face fastening frame (34) inside surface, the bottom of heat sink (33) after heat sink before cabinet (32) and cabinet is lock onto bottom surface corner seat frame (31) inside surface by two other locking crossbeam (2,26); Before cabinet, after heat sink (32) and cabinet, the middle part of heat sink (33) all laterally offers 3 air vents, and each disposed at air vent installs a quiet fan (13,14,15,16,17,18); Casing also has electric source line interface;
At cabinet inside, insulation liner plate (4) is installed in base plate (1) upside, and mainboard secure liner plate (23) is installed in insulation liner plate (4) top; Heat radiator is arranged, 4 heat radiator (5,6 in space between insulation liner plate (4) and mainboard secure liner plate (23), 11,12) one group of composition strip radiating area between two, and point two-layer layout, leave gap between two-layer heat radiator; The position of heat radiator is relative with vent locations, and the frontage and airiness hole, backlash direction of heat radiator; Electric discharge chip (7,8,9,10,19,20,21,22) in main control board is drawn by circuit and is distributed on each heat radiator;
Main control board (29) and internal cell (30) are installed in mainboard secure liner plate (23) upside; Cabinet panel (29) is fitted through the display screen (37) of circuit access main control board (29), button, accumulator anode and cathode plug, switch, temperature test line interface and communication interface;
Described p-wire comprises battery positive voltage connecting line, battery terminal negative connecting line, and end is the temperature test line of temperature sensor.
2. portable storage battery service life tester as claimed in claim 1, it is characterized in that, before described cabinet, after heat sink (32) and cabinet, heat sink (33) is U-shaped structure, the two-arm of U-shaped structure offers louvre, and brachium is less than the half of cabinet Left-Hand Panel (24), cabinet right panel (25); Before cabinet, heat sink (32) is relative with the U-shaped structural openings of heat sink after cabinet (33), also leaves gap between opening; Have the inner side that the cabinet Left-Hand Panel (24) of louvre and cabinet right panel (25) are installed on U-shaped structure two-arm equally; Cabinet Left-Hand Panel (24) is upper installs side handle, and this side handle exposes outside by the gap of heat sink (33) after heat sink before cabinet (32) and cabinet; Cabinet right panel (25) leaving certain gaps uncovered by the economic plan, electric source line interface is arranged on the left side wall of heat sink (33) after cabinet, is stretched out in outside cabinet by described breach.
3. portable storage battery service life tester as claimed in claim 1, it is characterized in that, described main control board (29) comprises main control chip, A/D convertor circuit, voltage collection circuit, memory circuit, voltage conversion circuit, constant-current discharge circuit, communicating circuit and charge management circuit;
Accumulator anode and cathode plug connects voltage collection circuit and the discharge loop accessed in constant-current discharge unit; Voltage collection circuit connects main control chip by A/D convertor circuit; Main control chip connects memory circuit, constant-current control circuit, communicating circuit, also connects temperature test line interface on cabinet panel (29) and described display screen and described button; Described electric source line interface connects described internal cell (30) by charge management circuit, internal cell (30) connects voltage conversion circuit, and the voltage that voltage conversion circuit provides internal cell (30) boosts, the electricity consumption device be supplied to after step-down process on main control board (29); Communicating circuit is connected with the communication interface on cabinet panel (29).
4. portable storage battery service life tester as claimed in claim 3, it is characterized in that, described constant-current discharge circuit comprises control module and 8 discharge modules; Be divided into 8 tunnels to enter 8 discharge modules from the electric signal of the tested accumulator of accumulator anode and cathode plug introducing, each discharge module adopts a metal-oxide-semiconductor as electric discharge chip, so each heat radiator is pasted 2 metal-oxide-semiconductors; Main control chip accesses the discharge current in described control module controlled discharge loop, and main control chip also gathers the actual discharge electric current of discharge module, carries out constant-current discharge control.
5. portable storage battery service life tester as claimed in claim 3, is characterized in that, be provided with current-limiting circuit in described charge management circuit.
6. portable storage battery service life tester as claimed in claim 3, it is characterized in that, be provided with relay switch in described charge management circuit, the input and output of relay switch connect the charging voltage delivery outlet of internal cell (30) and charge management circuit respectively; The control end of relay switch connects main control chip.
7. portable storage battery service life tester as claimed in claim 1, it is characterized in that, (29) are provided with SD card slot to cabinet panel further, and this SD card slot connects main control board (29) at cabinet inside.
8. portable storage battery service life tester as claimed in claim 3, is characterized in that, described A/D convertor circuit selects model to be 16 bit A/D converters of ADS8344.
9. portable storage battery service life tester as claimed in claim 1, is characterized in that, installation front handle, described end face fastening frame (34) both sides (35,36).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520193000.8U CN204613365U (en) | 2015-04-01 | 2015-04-01 | A kind of portable storage battery service life tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520193000.8U CN204613365U (en) | 2015-04-01 | 2015-04-01 | A kind of portable storage battery service life tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204613365U true CN204613365U (en) | 2015-09-02 |
Family
ID=53965913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520193000.8U Active CN204613365U (en) | 2015-04-01 | 2015-04-01 | A kind of portable storage battery service life tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204613365U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125669A (en) * | 2016-08-22 | 2016-11-16 | 张民胜 | A kind of equipment for Digit Control Machine Tool soft fault |
| CN106569140A (en) * | 2016-11-03 | 2017-04-19 | 东莞市哈维电子科技有限公司 | Battery detection device |
| CN106814320A (en) * | 2015-11-28 | 2017-06-09 | 华南理工大学 | A kind of lithium iron phosphate dynamic battery Cycle life prediction system |
| CN109061493A (en) * | 2018-08-02 | 2018-12-21 | 双新电器(郑州)制造有限公司 | A kind of ice storing time method based on battery tester |
| CN112218460A (en) * | 2020-10-13 | 2021-01-12 | 须海江 | Outdoor portable all-in-one of artificial intelligence |
-
2015
- 2015-04-01 CN CN201520193000.8U patent/CN204613365U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106814320A (en) * | 2015-11-28 | 2017-06-09 | 华南理工大学 | A kind of lithium iron phosphate dynamic battery Cycle life prediction system |
| CN106814320B (en) * | 2015-11-28 | 2019-05-14 | 华南理工大学 | A kind of lithium iron phosphate dynamic battery Cycle life prediction system |
| CN106125669A (en) * | 2016-08-22 | 2016-11-16 | 张民胜 | A kind of equipment for Digit Control Machine Tool soft fault |
| CN106569140A (en) * | 2016-11-03 | 2017-04-19 | 东莞市哈维电子科技有限公司 | Battery detection device |
| CN109061493A (en) * | 2018-08-02 | 2018-12-21 | 双新电器(郑州)制造有限公司 | A kind of ice storing time method based on battery tester |
| CN112218460A (en) * | 2020-10-13 | 2021-01-12 | 须海江 | Outdoor portable all-in-one of artificial intelligence |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204613365U (en) | A kind of portable storage battery service life tester | |
| KR100428342B1 (en) | System for managing and testing battery for electric vehicles | |
| CN202488114U (en) | Intelligent lithium battery guard plate | |
| CN101079552B (en) | Charging device with cell capacity analysis function | |
| CN103944206B (en) | Battery, supply unit and electronic device | |
| KR20220159863A (en) | Charging circuit, charging control method and electronic equipment | |
| CN210143211U (en) | Lithium battery protection board with heat dissipation function | |
| CN107238739A (en) | A kind of intelligent integrated formula ammeter and its operating method | |
| CN203747263U (en) | Lithium battery backup power supply cabinet | |
| CN207459518U (en) | A kind of structure and accessory of low voltage distribution cabinet | |
| CN205541732U (en) | Battery status LCD display screen | |
| CN218772611U (en) | Energy consumption data collection station with protection machanism | |
| CN207081819U (en) | A kind of accumulator cell charging and discharging integral type detector | |
| CN204425008U (en) | A kind of interchangeable electric-type charging pile | |
| CN206248745U (en) | Three-phase multifunctional electric instrument | |
| CN201266208Y (en) | Socket type metering ammeter | |
| CN207895051U (en) | A kind of plug type modularization accumulator cell charging and discharging detection device | |
| CN208984763U (en) | A kind of mainboard the high and low temperature test device for smart phone | |
| CN208508335U (en) | A kind of photovoltaic power supply management cabinet | |
| CN207721362U (en) | A kind of project cost budget case | |
| CN206879256U (en) | A kind of integral intelligent rack | |
| CN110138021B (en) | Integrated power supply device, system and power supply method | |
| CN206248796U (en) | Battery check device | |
| CN211653097U (en) | Storage battery pack testing device | |
| CN222016208U (en) | Direct-current stabilized power supply with battery management system for coal mine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |