CN2599596Y - Predetecting and processing device before cell depletion - Google Patents
Predetecting and processing device before cell depletion Download PDFInfo
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- CN2599596Y CN2599596Y CNU022951253U CN02295125U CN2599596Y CN 2599596 Y CN2599596 Y CN 2599596Y CN U022951253 U CNU022951253 U CN U022951253U CN 02295125 U CN02295125 U CN 02295125U CN 2599596 Y CN2599596 Y CN 2599596Y
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Abstract
A device capable of prior detection and treatment before a battery runs up is applicable in an all-day used power to maintain normal operation of a system, ensure completeness of stored files, for example, a memory unit of a computer mainboard, and effectively avoid loss of data in the memory unit. The system uses a utility power or a battery to supply power. When the system is powered by a battery, the device is used to monitor the battery use conditions and transmit the monitoring result in the form of a signal output to a signal processing module to judge whether the battery runs up or not. When the battery is found nearly used up, the signal processing module will check whether the utility power can supply power for the system or not. If the utility power can supply power, information of battery used up is displayed. If the utility power cannot supply power, the signal processing module will stand by and display the information of battery used up after the utility power supplies power for the system.
Description
Technical field
The utility model is the technology that detects battery electric quantity about a kind of, and particularly about a kind ofly detecting battery electric quantity in advance before running down of battery, and in time sending the device that electric weight exhausts information, this device power consumption is minimum, and is therefore very little to the electric quantity consumption of battery.
Background technology
Computing machine is a kind of data processing tools, can carry out the calculation of numerous and diverse program and manage huge data content, and it can be concluded data compilation becomes information, provides the user can efficiently carry out the judgement and the processing of every affairs.Add that in recent years the prosperity of Internet more makes computing machine become one of instrument of each family and company's indispensability with universal.
It is big that the user is for the evaluation of computing machine that accuracy height, travelling speed reach storage volume soon, and just because of this, people also increase the degree of dependence of computing machine thereupon.Act is in life anything, all will handle by computing machine such as financial consumption, education and study, file management.Yet above-mentioned front for computing machine is estimated and must be built on the correct and normal basis of computer operating of data input, in case computing machine can't normal operation, all items by Computer Processing all will be absorbed in the state that stops.For individual and company, estimate no matter in the loss of time or money, all be difficult to, even computing machine recovers normal operation in the future, the original data that stores of part, also may run off or damage, this will make normal inconvenience greatly for the user that long-term custom dependence computing machine carries out data storage and arrangement.In view of this, the computer maintenance managerial personnel cause the factor that computing machine can't normal operation at any, propose corresponding solution, for example, be the destruction that prevents that the computer virus invasion from causing, installation and measuring software program, strengthen firewall management, to stop virus attack; Problems such as data loss that interruption suddenly causes for power supply and hardware damage are then to be equipped with uninterrupted power source (UninterruptiblePower System; UPS) reply.The purpose of the above-mentioned practice all is to improve the stability of computer system; Computer maintenance managerial personnel and user have done a large amount of research for how further to improve computer system stability, wish that the stability of computer system further improves.
The raising of computer system stability is to enlarge one of computer utility scope necessary conditions, but the prior art major part is to solve the influence of external factor to computer stability at present, and for the influence that the inside computer system factor causes, then rare people mentions.The reason of inside computer system influence stability is a lot, and the storage device that wherein logger computer is soft on the computer main frame panel, hardware is correlated with built-in instruction data is as ROM-BIOS (Basic input-outputsystem; BIOS) set data in, be to leave on the computer main frame panel in the random access memory (CMOS RAM) of forming by complementary metal oxide semiconductor (CMOS), it stores the information of BIOS, and disc driver reads that order, keyboard position are set, the basic setup of the setting computer systems such as (Wake-up on LAN) of calling function of network when comprising the time, date of computing machine and start.When computer system is in off-mode, the data of CMOS RAM and real-time clock (Real Time Clock; RTC) must supply electricity with battery, the time of computing machine, date just can be correct like this, and the start flow process just can be normal, and the data of setting in the CMOS RAM just can not lost.
In case be the running down of battery of CMOS RAM and RTC supply electric weight, the data of all ROM-BIOS will be lost among the CMOS RAM, like this, in the time of can causing computer booting, the built-in instruction of no Basic Input or Output System (BIOS), whole hardware (comprising internal memory) are carried out testing, in case hardware goes wrong and meets with virus and invades, can't show that relevant information informs the user, computing machine also can't be carried out some the most basic tasks, as character is presented on the screen, obtain character from keyboard, sense data or information write wherein on floppy disk or the hard disk, the user also can't use calling function of network (Wake-up on LAN), computer system is waken up from the sleep holding state by network from long-range; At this moment, the user has only and sends motherboard back to manufacturer, and the set data in the BIOS is left among the CMOS RAM again, just might allow computing machine operate as normal again.Even so, also the basic document that can only set for the data that the user set afterwards, can only be re-entered with reference to originally setting form voluntarily by the user, brings very big trouble for like this user's work and life.
For solving the above-mentioned problem that battery electric quantity exhausts under the situation of no any early warning, manufacturer uses a kind of nickel-based battery on computer main frame panel, power supply as CMOS RAM and RTC, the voltage of this nickel-based battery is about 3.6V, appearance is cylindric, it is blue or red that color is generally, when computer booting, can charge voluntarily, RTC and the required power supply of CMOS RAM are provided when shutdown, though it can make the situation of running down of battery no longer take place, it also has shortcoming in the use, does not use for a long time as computing machine, have only regular start a few hours allow the nickel-based battery charging, the data of CMOSRAM and the setting of RTC just can not lost.In addition,, electrolytic solution is spilt, cause the motherboard burn into to produce situation of short circuit if nickel-based battery does not charge for a long time.
Because the shortcoming of above-mentioned nickel-based battery, the new now computer main frame panel of releasing, used lithium battery instead RTC and the required power supply of CMOS RAM are provided, the external form of this battery is oblate sheet, the battery of using with wrist-watch is the same, voltage is 3V, advantage is can not spill electrolytic solution, but it also can't charge voluntarily, has only the running down of battery of working as, cause computing machine can't normal boot-strap etc. problem when producing, the user just knows to be needed to have changed battery, the user can't know in advance that battery will exhaust, and also just can't take the corresponding precautionary measures, prevents that the set data of RTC and CMOS RAM from losing.
The utility model content
For overcoming the shortcoming of prior art, fundamental purpose of the present utility model is to provide a kind of device that detects in advance and handle before electric weight exhausts, and it exhausts speed to the minimum battery electric quantity of can not accelerating of battery electric quantity power consumption, it is applicable to needing all the period of time to supply with to keep running normal and guarantee the complete system that stores data by electric power, on for example all types of computer main frame panels, supply unlikely interruption in order to keep each unit required electric power of computer main frame panel, run off effectively to avoid the data in the storage device.
According to above-mentioned purpose, the utility model provides a kind of device that detects in advance and handle before running down of battery, and this device is to be connected with a system (for example computer main frame panel), this device utilizes the module on the powered battery outgoing route, operating position to battery detects, and when the battery electric quantity convergence exhausts, inform that the user carries out battery altering and handles, prevent that the situation that powered battery is interrupted from taking place.This device comprises standby power supply load module, battery supply load module, division module, battery electric quantity detection module, signal processing module, input power conversion module.
When system was in open state, a standby power supply load module for system's each several part device provides required power supply, and can provide system to carry out working power required when handling action when the battery electric quantity convergence exhausts; One battery supply load module is to take over the standby power supply load module to provide power supply to each device of internal system behind system closedown; One input power conversion module is when system is in open state, and the battery supply load module with the power supply of system during by off-mode provides, and being transformed to by the standby power supply load module provides; Otherwise, when system is in off-mode, import then that this system is the required power supply of power conversion module by the mode that the standby power supply load module provides, being converted to by the battery supply load module provides; One battery division module electrically connects with this battery supply load module; One battery electric quantity detection module, be to electrically connect with this battery division module, wherein, the voltage of battery supply load module output is through this battery division module, to offer the battery electric quantity detection module through the part voltage value of dividing potential drop, carry out running down of battery whether check and analysis, make this battery electric quantity detection module compare analysis according to the voltage value that battery supply load module and battery division module are exported respectively; An and signal processing module, be to electrically connect with this battery electric quantity detection module, compare the signal that transmits after the analysis in order to receive this battery electric quantity detection module, judge whether this signal is the running down of battery signal, if the power supply that the running down of battery signal then makes this battery supply load module of system prompt provide is about to exhaust.
Compared with prior art, the utility model provides a kind of device that detects in advance and handle before running down of battery, can be when the battery electric quantity convergence exhausts, in screen output relevant information, inform that in advance the user changes battery, can prevent the loss that stores data, guarantee the computer system operate as normal, the while has also avoided electrolytic solution to spill and battery does not have the misgivings that early warning just exhausts.
Description of drawings
Fig. 1 is a calcspar, shows the square module map of the device basic framework that the utility model detects in advance before running down of battery and handles;
Fig. 2 is that presentation graphs 1 detects before running down of battery and the schematic circuit diagram for the treatment of apparatus one embodiment in advance, wherein shows the electron device annexation that this device is interior; And
Fig. 3 is the operation workflow figure of an embodiment of presentation graphs 1 shown device, shows that this treating apparatus is to the detection of battery electric quantity when convergence exhausts and the process program of processing.
Embodiment
Embodiment
In following examples, the utility model is to be applied on the computer main frame panel, computer main frame panel is provided one can pretreated function before battery electric quantity exhausts, allow each unit of computer main frame panel can be because of running down of battery, cause the data content in the storage device to lose, and cause the computer system can't normal boot-strap.Yet be noted that at first that at this utility model does not limit and is applied on the computer main frame panel; In the broadest sense, the utility model needs all the period of time applicable to any, by the power supply supply of electrical energy, to keep normal operation and the complete system that guarantees to store data, in order to this system is provided the power supply of a stable output.
See also Fig. 1, it shows basic framework of the present utility model.As shown in FIG., the device 1 that detects in advance before this running down of battery and handle, comprise standby power supply load module 2, battery supply load module 3, division module 4, battery electric quantity detection module 5, signal processing module 6, input power conversion module 7, wherein, this input power conversion module 7 is connected to computer main frame panel 8, give computer main frame panel 8 power supplies, it can normally be moved, and this signal processing module 6 is to be connected with the start processing unit 80 of processing boot program in this computer main frame panel 8.
Standby power supply load module 2 and battery supply load module 3 provide power supply for computer main frame panel 8 operate as normal, but its two be not to provide power supply for computer main frame panel 8 simultaneously, wherein, the power supply that standby power supply load module 2 provides is a civil power, just alternating current is through the power supply behind the step-down rectifier, when computer main frame panel 8 is in open state, provide required power supply by this standby power supply load module 2 for the operate as normal of each unit on the computer main frame panel 8, when computer main frame panel 8 is off-mode, unit on the computer main frame panel 8, as CMOS (not icon), be by the unit power supply of storage master data in 3 pairs of computer main frame panels of battery supply load module.
As from the foregoing, main frame is when start or off-mode, power by different Power Entry Modules, it is by input power conversion module 7, according to the present residing state of main frame, switching to corresponding Power Entry Module is computer main frame panel 8 each unit (not icon) power supplies.
The purpose of this utility model is to detect in the past and handled in running down of battery, therefore when computer system is shut down, input power conversion module 7 switches to the power supply of computer main frame panel when being powered for motherboard by battery supply load module 3 by standby power supply load module 2, in order to ensure store data complete and system works normal, must the storage electric weight of battery supply load module 3 be detected, make the power supply of the computer main frame panel 8 unlikely interruption of originating, therefore the power supply of battery supply load module 3 outputs is to the process of importing power conversion module 7, must be via division module 4, whether battery electric quantity detection module 5 and signal processing module 6 exhaust the battery electric quantity of this battery supply load module 3 and to detect and to handle.
Battery electric quantity detection module 5, the partial pressure value that utilization receives from division module 4, switching device to this battery electric quantity detection module 5 carries out conducting and closing motion, if its switching device is the state of conducting, the electric weight abundance of promptly representing the battery of this battery supply load module 3, then be sent to signal processing module 6, make this signal processing module 6 output low (Low) electric potential signals; Closed condition represents that then the electric weight convergence of the battery of this battery supply load module 3 exhausts in this way, makes this battery electric quantity detection module 5 make this signal processing module 6 output one height (High) electric potential signals.
Signal processing module 6 only moves at the signal that changes its original hold mode, it is that the electric potential signal that battery electric quantity detection module 5 transmits is kept within the specific limits, when the electric potential signal of battery electric quantity detection module 5 output is higher than the retainable the highest scope of its institute, promptly change its original state that keeps, at first, export a detection signal to importing power conversion module 7, whether the civil power (AC power) that detecting this standby power supply load module 2 provides exists, if exist, then import power conversion module 7 signal is back to signal processing module 6, otherwise, as the civil power that provides (AC power) does not exist, input power conversion module 7 not return path signal when reappearing in computer main frame panel 8, just is back to signal processing module 6 with signal up to the civil power that provides (AC power) to signal processing module 6.Signal processing module 6 does not carry out any action before receiving return path signal, in case after receiving the signal of passback, start processing unit 80 to computer main frame panel 8 sends wake-up signal immediately, wake the computer main frame panel 8 that is under the sleep holding state up and carry out boot action, and in start process, carry out the start display routine (unlisted contents of program) that an electric weight exhausts, the information that electric weight is exhausted is presented on the screen (not icon) that is connected with this computer main frame panel 8 in the mode of literal.
Fig. 2 is the schematic circuit diagram of the embodiment in the presentation graphs 1, shows the annexation of the electron device that is comprised in this device.As shown in the figure, detection in advance and treating apparatus 1 have the power modules of two groups of supply computer main frame panel 8 each unit (not icon) before running down of battery, these two power supplys are not simultaneously computer main frame panel 8 to be powered, and it looks computer main frame panel 8 is that start or off-mode carry out conversion.Standby power supply load module 2 is when computer main frame panel 8 is in open state, accepts 3.3 volts of voltages after civil power passes through step-down, rectification; When computer main frame panel 8 enters off-mode, 3 volts of voltages that 8 use battery supplies of computer main frame panel load module 3 provides.According to computer main frame panel 8 states of living in, by the conversion that input power conversion module 7 is powered and originated, it is made of two diodes (Diode) device, utilizes the characteristic of the unidirectional conducting of diode that power supply is switched.Computer system is when open state, be to provide power supply via standby power supply load module 2 to computer main frame panel 8, promptly civil power becomes 3.3 volts voltage through step-down rectifier, behind the diode D1 in the power conversion module of flowing through 7, export computer main frame panel 8 to through node N1.At this moment 3 volts of voltages providing of battery supply load module 3, diode D2 in the power conversion module 7 of flowing through, also arrive node N1, because 3.3 volts of pressure drops that voltage causes node N1 of above-mentioned standby power supply module 2 outputs, 3 volts of voltages than 3 outputs of battery supply load module are big to the pressure drop that node N1 causes, therefore diode D2 can't conducting, have only diode D1 this moment is conducting, the stream of can powering passes through, therefore, computer main frame panel 8 only can become off-mode until computer main frame panel 8 by 8 power supplies of 2 pairs of computer main frame panels of standby power supply load module under open state.Standby power supply module 2 this moment (being civil power) is no longer powered to computer main frame panel 8, and the pressure drop of the node N1 limiting factor that output is caused to diode D2 disappears, and battery supply load module 3 can be powered to computer main frame panel 8.Because the purpose of this utility model is for battery electric quantity is detected and early warning, therefore before battery supply load module 3 supplies power to the computer main frame panel unit 8, it need be through division module 4, battery electric quantity detection module 5 and signal processing module 6 as shown in the figure, so that the operating position of battery electric quantity is monitored.Because above-mentioned module just is used for battery electric quantity is detected and when electric weight will exhaust, makes corresponding processing, so the power consumption of these modules should be not excessive, avoids accelerating the consumption of battery electric quantity.In view of this, the utility model is partly to propose a solution at this, just uses the minimum electron device of power consumption to detect and deals with the work.When by 3 power supplies of battery supply load module, the voltage V of its output
BatThe bleeder circuit of being made up of a series connection capacitor C 1, C2 carries out dividing potential drop to its voltage, because of battery supply load module 3 provides constant current, therefore series capacitance C1, C2 are open-circuit conditions for it, the electric capacity of this series connection can not consume this DC current, also just meaning can consuming cells Power Entry Module 3 in the energy of battery, this is different from and uses resistance in series to carry out the shortcoming of dividing potential drop in the prior art, because of this meeting current sinking, has just consumed the electric weight of battery.Division module 4 is that the voltage after partial value is offered battery electric quantity detection module 5, as its internal switch device Rule of judgment of conducting whether.Battery electric quantity detection module 5 is made up of the mos field effect transistor (N-ChannelMOSFET) of N channel, its consumed current is less than 1 μ A, belong to the minimum electron device of power consumption, drop to the electric weight of battery supply load module 3 additive decrementations minimum like this; The magnitude of voltage that division module 4 provides is the pressure drop V at grid G and source S two ends
GS, the mos field effect transistor of N channel is a voltage control device, promptly by input voltage VGS control channel size, the big more then channel of input voltage is also big more; The voltage V of battery supply load module 3 under the sufficient state of electric weight
BatBe between 2.5 volts to 3 volts, when 8 supplies of 3 pairs of computer main frame panels of battery supply load module were lower than 2.5 volts, for computer main frame panel 8, battery electric quantity approached to exhaust; Battery supply load module 3 output voltage V
BatWhen reducing to 2.5 volts by 3 volts, the partial pressure value that division module 4 provides, promptly the input voltage VGS of N-Channel MOSFET is also dropped to lowly by height, causes N-Channel MOSFET channel to be narrowed down by wide relatively.Work as V
BatValue when being higher than 2.5 volts, but the channel conducting of N-Channel MOSFET allows electric current flow into source S from drain D, to the pressure drop V between drain D and the source S
DsFor short-circuit condition, promptly the signal processing module 6 that connected of battery electric quantity detection module 5 will detect the wake-up signal of electronegative potential output, if V
BatVoltage has been lower than 2.5 volts, represents that promptly the battery electric quantity convergence exhausts, and this moment, N-Channel MOSFET channel was almost closed, and electric current can't pass through, and forms open-circuit condition, at this moment, and the pressure drop V between drain D and the source S
DSBecome big, the signal that signal processing module 6 is received is the wake-up signal of noble potential input, and signal processing module 6 is only handled the noble potential wake-up signal, because of the connotation of its expression is that the battery electric quantity convergence exhausts.
Signal processing module 6 is circuit (not icon) that complementary metal oxide semiconductor (CMOS) (CMOS) is formed, it can remain on certain limit with the voltage of signals that receives, and only (become low level or low level as a high position and uprise the position) just consumed power when signal condition changes, so that it consumes the electric weight that this battery supply load module 3 supplied is very little; Signal processing module 6 constantly receives the electronegative potential wake-up signal from 5 outputs of battery electric quantity detection module, and this signal remained in the low level range of receiving, up to battery electric quantity detection module 5 output noble potential wake-up signals, when making its low-end trim that keeps originally change into high-end trim, just handle action.At first, signal processing module 6 is sent detection signal earlier, detect the civil power (AC power) that provides by input power conversion module 7 and whether be present in computer main frame panel 8, if exist, be the information that return path signal alert signal processing module 6 civil powers exist, as not existing, input power conversion module 7 will be ready, up to the civil power that provides (AC power) when being present in computer main frame panel 8 again, just with the signal passback, signal processing module 6 is in preceding all being ready of signal passback.After the signal passback, just carry out next step, promptly export the start processing unit 80 of noble potential wake-up signal to computer main frame panel 8, the holding state of computer main frame panel 8 in sleep waken up, and carry out the start display routine that an electric weight exhausts, the information that battery electric quantity is exhausted is presented at written form on the screen (not icon) that is connected with this computer main frame panel 8, changes battery to remind the user.
Before running down of battery, detecting in advance and the operation workflow figure of an embodiment for the treatment of apparatus 1 in Fig. 3 presentation graphs 1, show battery supply load module 3 to input power conversion module 7 battery electric quantity is implemented the flow process that detects through the module on the path.
As shown in Figure 3, when the cell voltage that detects this battery supply load module 3 when battery detecting module 5 is lower than the needed operating voltage in computer main frame panel unit, carry out step S10 immediately, check by input power conversion module 7 whether the civil power (AC power) that this standby power supply load module 2 provides exists; As the civil power that provides (AC power) existence, then proceed to step S11, if not, then return this step S10.
In step 11, produce the start processing unit 80 that wake-up signal exports computer main frame panel 8 to by signal processing module 6, enter step S12.
At step S12, by this start processing unit 80 computer main frame panel 8 is waken up by the sleep holding state, and carry out boot action, enter step S13.
At step S13, when computer main frame panel 8 carried out boot action, the interior running down of battery start display routine of storage element (not icon) of computer main frame panel 8 was left in execution one in advance in, enters step S14.
At step S14, show on the start-up picture of computer screen that battery electric quantity exhausts information, so that remind the user to change battery.
Claims (5)
1, a kind of device that detects in advance and handle before running down of battery is applicable to that the round-the-clock power supply that provide is provided is normal and guarantee the complete system that stores data to keep running, it is characterized in that the device that should detect in advance before running down of battery and handle comprises:
One standby power supply load module in order to receive civil power, provides required working power during for system boot;
One battery supply load module is taken over the standby power supply load module, provides power supply to each device of internal system;
One division module electrically connects with this battery supply load module;
One battery electric quantity detection module is to electrically connect with this division module, detects and export the high and low accurate position of the voltage of representing battery electric quantity signal;
One signal processing module electrically connects with this battery electric quantity detection module, with the high and low accurate position of the voltage of pressing this battery electric quantity detection module output signal, differentiates and whether need carry out the preceding handling procedure of running down of battery; And
One power supply comes former conversion module, is to be electrically connected to this standby power supply load module and this signal processing module, with the power supply source by the state transformation system of the open and close machine of system and battery electric quantity.
2, the device of detection as claimed in claim 1 and processing is characterized in that, this battery division module is to utilize the mode of series capacitance.
3, the device of detection as claimed in claim 1 and processing is characterized in that, this battery electric quantity detection module is to use N channel metal-oxide semiconductor field effect transistor as switching device.
4, the device of detection as claimed in claim 1 and processing is characterized in that, the circuit that this signal processing module is to use a complementary metal oxide semiconductor (CMOS) to form.
5, the device of detection as claimed in claim 1 and processing is characterized in that, this signal processing module is the high and low variable signal of voltage quasi position that transmits by this battery electric quantity detection module, judges that whether battery electric quantity exhausts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU022951253U CN2599596Y (en) | 2002-12-30 | 2002-12-30 | Predetecting and processing device before cell depletion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU022951253U CN2599596Y (en) | 2002-12-30 | 2002-12-30 | Predetecting and processing device before cell depletion |
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| Publication Number | Publication Date |
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| CN2599596Y true CN2599596Y (en) | 2004-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU022951253U Expired - Fee Related CN2599596Y (en) | 2002-12-30 | 2002-12-30 | Predetecting and processing device before cell depletion |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426195C (en) * | 2005-05-13 | 2008-10-15 | 鸿富锦精密工业（深圳）有限公司 | Battery failure warning controlling circuit |
| US7615886B2 (en) | 2005-08-31 | 2009-11-10 | Fujitsu Limited | Electronic apparatus and computer-executable program |
| CN102269789A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗系统股份有限公司 | Alarming device of power failure |
| TWI383167B (en) * | 2008-09-23 | 2013-01-21 | Wistron Corp | Method for detecting operations of a power storage device and related power storage device |
| CN105607981A (en) * | 2014-10-31 | 2016-05-25 | 鸿富锦精密工业(武汉)有限公司 | Power supply alarm system of electronic device |
| CN109412218A (en) * | 2017-08-17 | 2019-03-01 | 上海卓亚医疗科技有限公司 | A kind of electric energy feedway of board memory chip or PLC controller |
| CN109726901A (en) * | 2018-12-17 | 2019-05-07 | 深圳市中行建设工程顾问有限公司 | A kind of Quality of Water Conservancy Projects safety supervision risk evaluating system |
| CN112051917A (en) * | 2019-06-06 | 2020-12-08 | 名硕电脑(苏州)有限公司 | Electronic display system and method for adjusting screen brightness thereof |
-
2002
- 2002-12-30 CN CNU022951253U patent/CN2599596Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426195C (en) * | 2005-05-13 | 2008-10-15 | 鸿富锦精密工业（深圳）有限公司 | Battery failure warning controlling circuit |
| US7615886B2 (en) | 2005-08-31 | 2009-11-10 | Fujitsu Limited | Electronic apparatus and computer-executable program |
| TWI383167B (en) * | 2008-09-23 | 2013-01-21 | Wistron Corp | Method for detecting operations of a power storage device and related power storage device |
| CN102269789A (en) * | 2010-12-31 | 2011-12-07 | 北京谊安医疗系统股份有限公司 | Alarming device of power failure |
| CN105607981A (en) * | 2014-10-31 | 2016-05-25 | 鸿富锦精密工业(武汉)有限公司 | Power supply alarm system of electronic device |
| CN109412218A (en) * | 2017-08-17 | 2019-03-01 | 上海卓亚医疗科技有限公司 | A kind of electric energy feedway of board memory chip or PLC controller |
| CN109726901A (en) * | 2018-12-17 | 2019-05-07 | 深圳市中行建设工程顾问有限公司 | A kind of Quality of Water Conservancy Projects safety supervision risk evaluating system |
| CN112051917A (en) * | 2019-06-06 | 2020-12-08 | 名硕电脑(苏州)有限公司 | Electronic display system and method for adjusting screen brightness thereof |
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