CN104428970B - Cell protection circuit and method - Google Patents

Abstract

The invention provides a cell protection circuit and a method. In the cell protection circuit, a main control module receives a voltage value of a cell and achieved via a voltage detection module, receives a temperature value of the cell and achieved via a temperature detection module, determins during a continuous period when the temperature value continues to be higher than preset celling temperature,and a second continuous period when the voltage value continues to be larger than preset ceiling voltage reaches preset time, a disconnection signal is output to a first switch module and a connection signal is output to a third switch; when the first switch receives the disconnection signal output by the main control module, a charging loop that the cell is charged by a power supplying module is disconnected; when the third switch module receives the connection signal output by the main control module, the charging loop is connected; and by the use of the cell protection circuit and method, the cell can be timly charged and discharged, so efficancy losing speed of the cell is reduced.

Description

A kind of battery core protection circuit and method

Technical field

The invention belongs to chargeable battery core field, more particularly to a kind of battery core protection circuit and method.

Background technology

Chargeable battery core, as stand-by power supply, can charge at any time, for the communication for being operated in the adverse circumstances such as high temperature sets It is standby, it is indispensable.

At present, as the function of the mobile terminals such as smart mobile phone is gradually enriched, the movement transmitted using mobile communications network Data significantly increase, and this brings enormous pressure to the communication apparatus for carrying data.Such as, for the user resident for carrying data Equipment (Customer Premise Equipment, CPE), needs to allow greater number of mobile terminal to access, it is ensured that each Mobile terminal can be normally carried out the mobile data transfer of uplink/downlink.The data that the access of a large amount of mobile terminals is brought are passed Defeated, the internal temperature that can cause CPE is raised, and CPE need to continue to be worked under higher temperature even high temperature.

Such as CPE needs the communication apparatus that work at high temperature for a long time, once power down, substantial amounts of mobile terminal cannot normally connect Enter mobile communications network, cause communication disruption, be likely to result in serious consequence, such as being not successfully received for important mobile data；To keep away Exempt from the interruption of mobile terminal communication, chargeable battery core is equipped with communication apparatus.For the battery core in communication apparatus, also can be long-term Under hot conditionss, under the high temperature conditions, if battery core voltage more than pre-set upper voltage limit, can increase with battery core voltage Height, battery core failure is faster, and battery core fails faster when especially battery core is continuously in full voltage state.

The content of the invention

It is an object of the invention to provide a kind of battery core protection circuit, it is intended to solve long-term work in preset upper limit temperature it Battery core on upper and pre-set upper voltage limit, can accelerate the problem of battery core failure.

In a first aspect, a kind of battery core protection circuit, including supply module, load blocks, voltage detection module, temperature detection Module and battery core, the battery core respectively with the supply module, the load blocks, the voltage detection module and the temperature Detection module connects；The battery core protection circuit also includes main control module, first switch module and the 3rd switch module；Described One switch module is connected between the supply module and the battery core, and the 3rd switch module is connected to the battery core and institute State between load blocks, the main control module is opened respectively with the voltage detection module, the temperature detecting module, described first Close module and the 3rd switch module connection；

The main control module is used for：Receive the electricity that the voltage detection module carries out obtained by voltage detecting to the battery core Pressure value, the reception temperature detecting module carries out the temperature value obtained by temperature detection to the battery core；The main control module is also For：It is determined that within the temperature value the first persistent period persistently higher than preset upper limit temperature, if the magnitude of voltage continues Preset Time is reached more than the second persistent period of preset upper limit voltage, then exports cut-off signal to the first switch module, And export communications signals to the 3rd switch module；

The first switch module is used for：When the cut-off signal of the main control module output is received, the confession is disconnected The charge circuit that electric module charges to the battery core；

3rd switch module is used for：When the communications signals of the main control module output are received, the electricity is connected Current supply circuit of the core to the power load modules.

In the first possible implementation of first aspect, the main control module is additionally operable to：It is little in the magnitude of voltage When pre-determined lower limit voltage, communications signals are exported to the first switch module, and disconnected to the 3rd switch module output Signal；

The first switch module is additionally operable to：When the communications signals of the main control module output are received, connection is described The charge circuit that supply module charges to the battery core；

3rd switch module is additionally operable to：When the cut-off signal of the main control module output is received, disconnect described Current supply circuit of the battery core to the power load modules.

With reference to the first possible implementation of first aspect or first aspect, second in first aspect is possible In implementation, the battery core protection circuit also includes second switch module；The second switch block coupled in series is in the power supply Between module and the load blocks, and it is connected with the main control module；

The main control module specifically for：Persistently hold higher than described the first of the preset upper limit temperature in the temperature value In the continuous time, if the magnitude of voltage persistently reaches described presetting more than second persistent period of the preset upper limit voltage Time, then cut-off signal is exported to the first switch module, to the 3rd switch module communications signals are exported, also to described Second switch module exports cut-off signal；

The second switch module is used for：When the cut-off signal of the main control module output is received, the confession is disconnected Current supply circuit of the electric module to the power load modules.

With reference to second possible implementation of first aspect, in the third possible implementation of first aspect In, the main control module specifically for：When the magnitude of voltage is less than pre-determined lower limit voltage, to first switch module output Communications signals, and cut-off signal is exported to the 3rd switch module, also export communications signals to the second switch module；

The second switch module is additionally operable to：When the communications signals of the main control module output are received, connection is described Current supply circuit of the supply module to the power load modules.

Second with reference to first aspect either the first possible implementation of first aspect or first aspect can The implementation of energy or the third possible implementation of first aspect, in the 4th kind of possible realization side of first aspect In formula, the main control module includes timing module；

The timing module is used for：To the temperature value persistently higher than the preset upper limit temperature time timing and obtain First persistent period, to the magnitude of voltage persistently more than the preset upper limit voltage time timing and obtain described second Persistent period；

The main control module is additionally operable to：When the temperature value is less than the preset upper limit temperature by timing module note First persistent period of record is set to zero, when the magnitude of voltage is less than the preset upper limit voltage by timing module note Second persistent period of record is set to zero.

A kind of second aspect, battery core guard method, the battery core guard method includes：

Obtain the magnitude of voltage and temperature value of battery core；

It is determined that within the temperature value the first persistent period persistently higher than preset upper limit temperature, if the magnitude of voltage is held Continuous the second persistent period more than preset upper limit voltage reaches Preset Time, then the battery core is discharged, wherein, described the One persistent period was more than or equal to the Preset Time.

In the first possible implementation of second aspect, the battery core guard method also includes：

When the magnitude of voltage is less than pre-determined lower limit voltage, the battery core is charged.

With reference to the first possible implementation of second aspect or second aspect, second in second aspect is possible In implementation, the battery core guard method also includes：

When the temperature value is less than the preset upper limit temperature, first persistent period is set to into zero；

When the magnitude of voltage is less than the preset upper limit voltage, second persistent period is set to into zero.

The invention has the beneficial effects as follows：Carry out lasting temperature detection to battery core, and the voltage of battery core is carried out lasting Detection；Temperature value to detecting was the first persistent period higher than the persistent period timing of preset upper limit temperature；To what is detected Magnitude of voltage was the second persistent period more than the persistent period timing of preset upper limit voltage；First persistent period second holds comprising this The continuous time, when the first persistent period and the second persistent period the Preset Time is simultaneously greater than, stop charging battery core, while Battery core is discharged by load blocks, reduces the voltage of battery core, slow down the failure speed of battery core.

Description of the drawings

Technical scheme in order to be illustrated more clearly that the embodiment of the present invention, below will be to embodiment or description of the prior art Needed for the accompanying drawing to be used be briefly described, it should be apparent that, drawings in the following description be only the present invention some Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can be with according to these Accompanying drawing obtains other accompanying drawings.

Fig. 1 is the composition structure chart of battery core protection circuit provided in an embodiment of the present invention；

Fig. 2 is a kind of composition structure chart of optimization of battery core protection circuit provided in an embodiment of the present invention；

Fig. 3 is the flow chart of battery core guard method provided in an embodiment of the present invention；

Fig. 4 is a kind of Optimizing Flow figure of battery core guard method provided in an embodiment of the present invention.

Specific embodiment

In order that the objects, technical solutions and advantages of the present invention become more apparent, it is right below in conjunction with drawings and Examples The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, and It is not used in the restriction present invention.In order to illustrate technical solutions according to the invention, illustrate below by specific embodiment.

Battery core protection circuit provided in an embodiment of the present invention is applied to the equipment for working in high temperature, and including in the equipment can Charging battery core；For specific equipment, here is not limited, such as router, base station.In the specific embodiment of the present invention In, battery core protection circuit provided in an embodiment of the present invention is applied to the communication apparatus worked under high temperature will be more excellent, and the communication sets It is few to the utmost to include communication access device and communication forwarding unit and the data handling equipment in core net etc., such as CPE.

Battery core protection circuit provided in an embodiment of the present invention includes supply module 64, load blocks 66, voltage detection module 67th, temperature detecting module 68 and with battery core 65, such as the battery core protection circuit shown in Fig. 1.In embodiments of the present invention, the electricity Core 65 respectively with the supply module 64, the load blocks 66, the voltage detection module 67 and the temperature detecting module 68 connections, the battery core 65 is chargeable battery core.In embodiments of the present invention, the load blocks 66 are can to consume electric energy in equipment Device, such as the radio circuit in communication apparatus.Certainly, also specially can increase for consuming electric energy in load blocks 66 Power consuming circuit, by the power consuming circuit repid discharge of high current is carried out to battery core 65, to reduce the voltage of battery core 65 rapidly, is prolonged The service life of long battery core 65.

In embodiments of the present invention, supply module 64 need to access the signal of telecommunication from rectification module；Supply module 64 can be by having Line connects or the mode of wireless connection obtains the signal of telecommunication from rectification module.Specifically, the rectification module is filtered to civil power through EMI The signal of telecommunication needed for the supply module 64 is obtained after processing with rectification etc..Further, if supply module 64 and the rectification module It is wired connection, i.e., supply module 64 directly accesses the signal of telecommunication from the rectification module of electrical connection；If supply module 64 with The rectification module is wireless connection, then rectification module also needs to convert electrical signals to radiofrequency signal, and this is whole for supply module 64 pairs The radiofrequency signal that flow module gives off is coupled to receive, and the signal of telecommunication being coupled to receive is the access of the supply module 64 The signal of telecommunication.

For supply module 64, it also has Voltage Cortrol, electric current adjustment and/or power adjustment functions；Adjust out load Load blocks 66 are powered by the drive signal needed for module 66 using the drive signal for adjusting out；What is charged to battery core 65 Different charging stages, the charging signals according to needed for the real-time adjustment of charging voltage of battery core 65 goes out battery core 65, by the charging Signal charges to battery core 65.

For the supply module 64 of the battery core protection circuit, as a kind of concrete optimization structure, as shown in figure 1, the confession Electric module 64 at least has power access end (IN+, IN-), charging end (CHR+, CHR-) and feeder ear (SU+, SU-)；Wherein, Power access end IN-, charging end CHR- and feeder ear SU- are grounded.Charging end (the CHR+, CHR-) correspondence of supply module 64 connects The positive pole and negative pole of the battery core 65.Feeder ear (the SU+, SU-) correspondence of supply module 64 connects the first power end of load circuit VC1 and earth terminal GND.It should be noted that, other and the incoherent end of the embodiment of the present invention that the supply module 64 is had Mouthful, here is not limited and described.

In the present embodiment, the supply module 64 accesses the signal of telecommunication from the power access end (IN+, IN-), to accessing The signal of telecommunication carry out signal adjustment and adjust out drive signal and charging signals respectively.Then, the supply module 64 is from described Feeder ear SU+ exports the drive signal, the feelings of the current supply circuit connection powered to load blocks 66 in the supply module 64 Under condition, the load blocks 66 are driven to work by the drive signal.In addition, the supply module 64 is from the charging end CHR+ The charging signals are exported, in the case where the charge circuit that the supply module 64 charges to battery core 65 is connected, is filled by this The signal of telecommunication charges to the battery core 65.

In the present embodiment, for supply module 64 accesses the concrete mode of the signal of telecommunication, supply module 64 is connect by power supply Enter end (IN+, IN-) to set up wired connection with rectification module or be wirelessly connected；The rectification module is filtered and whole to civil power through EMI Stream etc. obtains the signal of telecommunication needed for the supply module 64 after processing.Further, if supply module 64 is have with the rectification module Line connection, i.e., supply module 64 is directly electrically connected by the power access end (IN+, IN-) with the rectification module, the rectification Module directly can export the signal of telecommunication by the power access end (IN+, IN-) to supply module 64；If supply module 64 with The rectification module is wireless connection, then rectification module also needs to convert electrical signals to radiofrequency signal, what supply module 64 was provided Power access end (IN+, IN-) can be coupled by way of antenna is received to the radiofrequency signal that the rectification module gives off Receive, the signal of telecommunication being coupled to receive is the telecommunications that the supply module 64 is accessed from the power access end (IN+, IN-) Number.

In the present embodiment, for supply module 64 adjusts out the specific embodiment of drive signal and charging signals, in detail State as follows：

1, for the voltage needed for different loads module 66, electric current or power, the supply module 64 adjusts out negative with this Carry the drive signal of the matching of module 66.Specifically, if the load blocks 66 are required to its required voltage, by the power supply Module 64 adjusts out the drive signal with the required voltage of the load blocks 66, from the power supply electrically connected with load blocks 66 End SU+ exports the drive signal；When the current supply circuit that supply module 64 is powered to load blocks 66 is formed, believed by the driving Number the load blocks 66 are driven to work on power；If the load blocks 66 are required to its required electric current, the supply module 64 adjust out the drive signal with electric current needed for the load blocks 66；Will if the load blocks 66 have to its power demand Ask, the supply module 64 adjusts out the drive signal with the power demand of the load blocks 66.It is preferable to carry out in the present invention one In example, supply module 64 goes out to load mould using PFC (Power Factor Correction, PFC) the regulation of electrical circuit Drive signal needed for block 66 and adjust out the charging signals；Wherein, the available pfc circuit of supply module 64 include but not It is limited to following one kind or its combination：The pfc circuit of buck types, the pfc circuit of boost types, buck-boost types PFC it is electric Road.It is furthermore preferred that can be supply module 64 from linear pfc circuit according to adjustment needs, or it be supply module 64 from non- Linear pfc circuit.

2, the supply module 64 is also directed to the battery core 65 and is adjusted in the voltage or electric current needed for the different charging stages, Adjust out and be suitable to battery core 65 (voltage needed for having the charging stage, or has in the charging signals needed for the different charging stages The charging solves required electric current), the charging signals are exported from the charging end CHR+ that can be electrically connected with the battery core 65, pass through The charging signals charge to battery core 65.In a preferred embodiment, supply module 64 carries out adopting pulse width modulation (Pulse Width Modulation, PWM) is adjusted to the signal of telecommunication accessed from the power access end (IN+, IN-), Required drive signal is adjusted out respectively and adjusts out the charging signals.In a preferred embodiment, load blocks 66 can also adopt the signal adjustment circuit such as pfc circuit and PWM circuit to accessing from the power access end (IN+, IN-) The signal of telecommunication is combined adjustment, and required drive signal is adjusted out respectively and the charging signals are adjusted out.

In embodiments of the present invention, the voltage detection module 67 for the battery core protection circuit being included and temperature detection mould Block 68.Wherein, the voltage detection module 67 is used to detect the voltage of the battery core 65, detects to the output of the main control module 61 The magnitude of voltage for arriving.Wherein, the temperature detecting module is used for：The temperature of the battery core 65 is detected, and to the main control module 61 The temperature value that output is detected.

Optimize structure as the one of voltage detection module 67, as shown in figure 1, the voltage detection module 67 at least has electricity Pressure test side (TV+, TV-) and the first detection output TO1, voltage detecting end (the TV+, TV-) correspondence and the battery core 65 Positive pole and negative pole electrical connection.It should be noted that, other having for the voltage detection module 67 are with the embodiment of the present invention not Related port, here is not limited and described.

Specifically when voltage detecting is carried out to battery core 65, by voltage detecting end (TV+, TV-) the direct access battery core Voltage difference between 65 both positive and negative polarity；The voltage difference that voltage detection module 67 pairs gets carries out signal processing, such as to the acquisition To voltage difference be filtered successively and digital-to-analogue conversion (i.e. AD conversion, including sampling, quantify and encode etc.)；Signal processing is gone out Numerical value as the magnitude of voltage obtained by during the voltage for detecting the battery core 65, export the electricity from first detection output TO1 Pressure value.

Optimize structure as the one of temperature detecting module 68, as shown in figure 1, the temperature detecting module 68 at least has temperature Degree test side TT and the second detection output TO2, the temperature detection end TT is electrically connected with the battery core 65；The temperature detection Module 68 detects the temperature of the battery core 65 by the temperature detection end TT, and from second detection output TO2 output The temperature value for detecting.It should be noted that, it is uncorrelated to the embodiment of the present invention for other that the temperature detecting module 68 has Port, here do not limit and describes.

Specifically when the temperature of battery core 65 is detected, realized by temperature sensor, directly gathered by the temperature sensor The temperature of the battery core 65 simultaneously obtains the temperature signal simulated, and the temperature signal of 68 pairs of simulations of temperature detecting module is carried out at signal Temperature value is obtained after reason, using the temperature value obtained after signal processing as the temperature value for detecting, from the described second inspection Survey the temperature value that outfan TO2 outputs are detected.In a preferred embodiment, the temperature of 68 pairs of simulations of temperature detecting module Signal at least employs the modes such as digital-to-analogue conversion (i.e. AD conversion, including sampling, quantization and coding etc.) and carries out signal processing, with To the temperature value of number format；More optimizedly, during the signal processing for carrying out to the temperature signal of the simulation, in digital-to-analogue Before conversion, the temperature signal to simulating is filtered to filter noise signal in advance, it is ensured that what is quantified in digital-to-analogue conversion is accurate Degree.

It is emphasized that battery core protection circuit provided in an embodiment of the present invention also includes main control module 61, first switch mould The switch module 63 of block 62 and the 3rd；The first switch module 62 is connected between the supply module 64 and the battery core 65, 3rd switch module 63 is connected between the battery core 65 and the load blocks 66, the main control module 61 respectively with institute State first switch module 62 and the 3rd switch module 63 connects.Wherein, institute is connected or disconnected by first switch module 62 The charge circuit that 64 pairs of battery cores 65 of supply module charge is stated, in first switch module 62 64 pairs of institutes of the supply module are connected When stating the charge circuit of the charging of battery core 65, supply module 64 to battery core 65 exports charging signals, and battery core 65 is charged.Wherein, lead to The current supply circuit that the 3rd switch module 63 connected or disconnected 65 pairs of power supplies of the load blocks 66 of the battery core is crossed, in the 3rd switch When module 63 connects the current supply circuit of 65 pairs of power supplies of the load blocks 66 of the battery core, battery core 65 is supplied by the load blocks 66 Electricity.

In embodiments of the present invention, for the main control module 61 in battery core protection circuit, the main control module 61 respectively with The voltage detection module 67, the temperature detecting module 68, the first switch module 62 and the 3rd switch module 63 Connection.The main control module 61 is used for：Receiving 67 pairs of battery cores 65 of the voltage detection module is carried out obtained by voltage detecting Magnitude of voltage, described 68 pairs of battery cores 65 of temperature detecting module of reception carry out the temperature value obtained by temperature detection；The master control Module 61 is additionally operable to：It is determined that within the temperature value the first persistent period persistently higher than preset upper limit temperature, if the electricity Pressure value persistently reaches Preset Time more than the second persistent period of preset upper limit voltage, then export to the first switch module 62 Cut-off signal, and export communications signals to the 3rd switch module 63.Further, the first switch module 62 is used for：Connecing When receiving the cut-off signal of the output of the main control module 61, the charging time that 64 pairs of battery cores 65 of the supply module charge is disconnected Road.Further, the 3rd switch module 63 is used for：When the communications signals of the output of the main control module 61 are received, institute is connected State the current supply circuit of 65 pairs of power supplies of the load blocks 66 of battery core.

Optimize structure as the one of main control module 61, as shown in figure 1, the main control module 61 at least has the first test side T1, the second test side T2, the first control end CTL1 and the 3rd control end CTL3, the first test side T1 connects the voltage detecting First detection output TO1 of module 67, the second test side T2 connects the second detection output of the temperature detecting module 68 End TO2, first control end CTL1 connects the first controlled end C1 of the first switch module 62, the 3rd control end CTL3 Meet the 3rd controlled end C3 of the 3rd switch module 63；Detect described in the main control module 61 from the first test side T1 receptions Magnitude of voltage, the temperature value for detecting is received from the second test side T2, in the temperature value for detecting persistently higher than in advance If if the magnitude of voltage for detecting persistently is held more than the second of preset upper limit voltage in the first persistent period of ceiling temperature The continuous time reaches Preset Time, then export cut-off signal from first control end CTL1, and from the 3rd control end CTL3 Output communications signals.It should be noted that, other and the incoherent port of the embodiment of the present invention that the main control module 61 is had, Here is not limited and described.It is another it should be noted that, second persistent period is contained in first persistent period.

In order to protect to the battery core 65 worked under high temperature, the embodiment of the present invention proposes the preset upper limit temperature, According to the heat-resistant quality of battery core 65, the temperature range for being capable of normal work is determined；It is prolongation within the temperature range of determining The service life of battery core 65, further determines that the preset upper limit temperature.It is emphasized that due under hot operation, existing As the voltage of battery core 65 increases faster this characteristic and battery core 65 fails, in order to extend the service life of battery core 65, it is to avoid battery core 65 too fast failures at high temperature, the embodiment of the present invention also proposed the preset upper limit voltage and the predeterminated voltage, and this is preset Upper voltage limit and the predeterminated voltage can change setting according to the material characteristic of requirement of the equipment to battery core 65 and battery core 65.

And then in embodiments of the present invention, main control module 61 makees following control：Continue to receive described from the second test side T2 The temperature value for detecting, judges whether the temperature value for detecting is higher than preset upper limit temperature, if the temperature for detecting Angle value is higher than preset upper limit temperature, to the temperature value for detecting higher than the persistent period timing of preset upper limit temperature, will be counted When time for obtaining as first persistent period.In addition, also from the magnitude of voltage detected described in the first test side T1 receptions, Within first persistent period, the magnitude of voltage to detecting described in receiving is made whether more than the preset upper limit voltage Judge, if the magnitude of voltage for detecting carries out, more than the preset upper limit voltage, being more than the magnitude of voltage for detecting The persistent period timing of the preset upper limit voltage, the time that timing is obtained is used as second persistent period.So as to In one persistent period to during the second persistent period timing (second persistent period is contained in first persistent period, and First persistent period was more than for the second persistent period), once the second persistent period timing is then led to the Preset Time Control module 61 exports cut-off signal from first control end CTL1 immediately, and while from the 3rd control end CTL3 output connection letter Number.For the cut-off signal that main control module 61 is exported from first control end CTL1, the first switch module 62 can be from the One controlled end C1 receives the cut-off signal, and then disconnects being electrically connected for the first switch end K1 and second switch end K2 Connect, stop the charging by the charging signals to the battery core 65.For main control module 61 is from the 3rd control end CTL3 The communications signals of output, the 3rd switch module 63 can receive the communications signals from the 3rd controlled end C3, and then set up institute The electrical connection of the 5th switch terminals K5 and the 6th switch terminals K6 is stated, is powered by 65 pairs of load blocks 66 of the battery core. So, within the first persistent period, once the second persistent period timing is to the Preset Time, stop filling battery core 65 Electricity, is also discharged battery core 65 by load blocks 66；That is, the first persistent period and the second persistent period be simultaneously greater than it is described pre- If during the time, stopping is charged to battery core 65, while discharging battery core 65 by load blocks 66, the voltage of battery core 65 is reduced, prolonged The failure speed of long battery core 65.

Optimize structure as the one of first switch module 62, as shown in figure 1, first switch module 62 has first switch end K1, second switch end K2 and the first controlled end C1, the first switch end K1 is corresponding with second switch end K2 to connect the power supply mould The charging end CHR+ of block 64 and the positive pole of the battery core 65, first controlled end C1 connects the first control end of main control module 61 CTL1；The first switch module 62 disconnects the first switch end when cut-off signal is received from the first controlled end C1 The electrical connection of the K1 and second switch end K2, disconnects the charge circuit that supply module 64 charges to battery core 65, stops passing through institute State charging of the charging signals to the battery core 65.

In embodiments of the present invention, first switch module 62 is serially connected in charging end CHR+ and the institute of the supply module 64 State between the positive pole of battery core 65, can control whether that connect supply module 64 fills to the charging of battery core 65 by first switch module 62 Electrical circuit, decides whether that the charging signals exported by the supply module 64 are charged to battery core 65.Particularly for described first Whether switch module 62, tapped into by the first controlled end C1 to the first switch end K1 being electrically connected with the second switch end K2 Row control；When the cut-off signal of the output of main control module 61 is received from the first controlled end C1, the first switch end K1 is disconnected With the electrical connection of the second switch end K2, the charging end CHR+ of the supply module 64 and being electrically connected for the battery core 65 are disconnected Connect, disconnect the charge circuit that supply module 64 charges to battery core 65, stop the charging signals by the output of the supply module 64 Charging to the battery core 65；When the communications signals of the output of main control module 61 are received from the first controlled end C1, by described the One switch terminals K1 are electrically connected with the second switch end K2, set up charging end (CHR+, CHR-) and the institute of the supply module 64 The electrical connection of battery core 65 is stated, the charging signals exported by the supply module 64 are charged to the battery core 65.

Optimize structure as the one of the 3rd switch module 63, as shown in figure 1, the 3rd switch module 63 has the 5th to open End K5, the 6th switch terminals K6 and the 3rd controlled end C3 are closed, the 5th switch terminals K5 are corresponding with the 6th switch terminals K6 to meet institute State the positive pole of battery core 65 and the second source end VC2 of the load blocks 66；3rd switch module 63 is from the described 3rd The 5th switch terminals K5 are electrically connected with the 6th switch terminals K6 when controlled end C3 receives communications signals, forms battery core 65 Current supply circuit to the power supply of load blocks 66, the battery core 65 is discharged by the load blocks 66.

In embodiments of the present invention, the positive pole of the battery core 65 is connected with the earth terminal GND of the load blocks 66, and the 3rd Switch module 63 is serially connected between the positive pole of the battery core 65 and the second source end VC2 of the load blocks 66, can be by the Three switch modules 63 control whether to connect the current supply circuit that battery core 65 powers load blocks 66, decide whether by the battery core 65 pairs of load blocks 66 are powered.Particularly for the 3rd switch module 63, by the 3rd controlled end C3 to whether by described Five switch terminals K5 are electrically connected with the 6th switch terminals K6 and are controlled；It is defeated main control module 61 is received from the 3rd controlled end C3 During the cut-off signal for going out, the 5th switch terminals K5 and the electrical connection of the 6th switch terminals K6 are disconnected, that is, disconnect the battery core 65 positive pole and the electrical connection of the second source end VC2 of the load blocks 66, disconnect what battery core 65 was powered to load blocks 66 Current supply circuit, stops the power supply by 65 pairs of load blocks 66 of the battery core；Master control is being received from the 3rd controlled end C3 During the communications signals of the output of module 61, the 5th switch terminals K5 are electrically connected with the 6th switch terminals K6, set up the electricity The positive pole of core 65 and the electrical connection of the second source end VC2 of the load blocks 66, connect battery core 65 and load blocks 66 are powered Current supply circuit, using the battery core 65 export the signal of telecommunication load blocks 66 are powered.

Pre-determined lower limit voltage is embodiments provided, is stopping charging battery core 65 and to battery core 65 by loading mould During block 66 discharges, there is enough voltage in order to keep battery core 65, set the pre-determined lower limit voltage；Under hot operation It is too fast to prevent battery core 65 from failing, the pre-determined lower limit voltage can be adjusted for distinct device, certainly, the pre-determined lower limit electricity Pressure cannot be below to prevent battery core 65 from crossing the threshold voltage put and set.

Therefore, the main control module 61 provided in an embodiment of the present invention is additionally operable to：Voltage detection module described in real-time reception The 67 pairs of battery cores 65 carry out the magnitude of voltage obtained by voltage detecting, when the magnitude of voltage is less than pre-determined lower limit voltage, to institute The output communications signals of first switch module 62 are stated, and cut-off signal is exported to the 3rd switch module 63.Further, described first Switch module 62 is additionally operable to：When the communications signals of the output of the main control module 61 are received, the supply module 64 pairs is connected The charge circuit that the battery core 65 charges.Accordingly, the 3rd switch module 63 is additionally operable to：Receiving the main control module During the cut-off signal of 61 outputs, the current supply circuit of 65 pairs of power supplies of the load blocks 66 of the battery core is disconnected.

And then be preferable to carry out as the present invention one, the main control module 61 is less than in the magnitude of voltage for detecting and sets in advance Communications signals are exported from first control end CTL1 during voltage limit, and cut-off signal is exported from the 3rd control end CTL3； Further, the first switch module 62 when communications signals are received from the first controlled end C1 by the first switch end K1 Electrically connect with the second switch end K2, the charge circuit that 64 pairs of battery cores 65 of the supply module charge is connected, by institute State charging signals to charge the battery core 65.Accordingly, the 3rd switch module 63 is being received from the 3rd controlled end C3 The electrical connection of the 5th switch terminals K5 and the 6th switch terminals K6 is disconnected during to cut-off signal, described 65 pairs of institutes of battery core are disconnected The current supply circuit of the power supply of load blocks 66 is stated, stops the power supply by 65 pairs of load blocks 66 of the battery core.

Specifically, during stopping charging battery core 65 and battery core 65 being discharged by load blocks 66, yet by Voltage detection module 67 is persistently detected to the voltage of battery core 65, while the main control module 61 is received from the first test side T1 The magnitude of voltage for detecting of the output of voltage detection module 67, whether the magnitude of voltage detected described in real-time judge is less than default Lower voltage limit, once the magnitude of voltage for detecting is less than pre-determined lower limit voltage, then connects from first control end CTL1 output Messenger, and export cut-off signal from the 3rd control end CTL3.

Further, for the communications signals that main control module 61 is exported from first control end CTL1, the first switch mould Block 62 can receive the communications signals from the first controlled end C1, and then set up the first switch end K1 with the second switch end The electrical connection of K2, connects the charge circuit that 64 pairs of battery cores 65 of the supply module charge, defeated by the supply module 64 The charging signals for going out charge to the battery core 65.Accordingly, the disconnection that main control module 61 is exported from the 3rd control end CTL3 Signal, the 3rd switch module 63 can receive the cut-off signal from the 3rd controlled end C3, and then disconnect the 5th switch End K5 and the electrical connection of the 6th switch terminals K6, disconnect the current supply circuit that the battery core is powered to the load blocks 66, stop The only power supply of 65 pairs of load blocks 66 of the battery core.So, by the voltage of battery core 65 be maintained at the pre-determined lower limit voltage with On, play a part of stand-by power supply.

Fig. 2 illustrates the preferred composition structure of one kind of battery core protection circuit provided in an embodiment of the present invention, and only illustrate with The related part of the embodiment of the present invention.

For purposes of illustration only, by taking Fig. 2 as an example, battery core protection circuit provided in an embodiment of the present invention also includes second switch module 69；The second switch module 69 is connected between the supply module 64 and the load blocks 66.So, second can be passed through Switch module 69 connects or disconnects the current supply circuit of 64 pairs of power supplies of the load blocks 66 of the supply module.

In addition, the second switch module 69 is also connected with the main control module 61；Accordingly, as the master control of the present embodiment Module 61, the main control module 61 can be specifically for：In the temperature value persistently higher than described the of the preset upper limit temperature In one persistent period, if the magnitude of voltage persistently reach more than second persistent period of the preset upper limit voltage it is described Preset Time, then export cut-off signal to the first switch module 62, and to the 3rd switch module 63 communications signals are exported, Also export cut-off signal to the second switch module 69.Correspondingly, the second switch module 69 is used for：It is described receiving During the cut-off signal of the output of main control module 61, the current supply circuit of 64 pairs of power supplies of the load blocks 66 of the supply module is disconnected.

Optimize structure as the one of main control module 61, as shown in Fig. 2 the main control module 61 also has the second control end CTL2, second control end CTL2 meets the second controlled end C2 of the second switch module 69；The main control module 61 is in institute The temperature value for detecting is stated persistently higher than in first persistent period of the preset upper limit temperature, detect if described Magnitude of voltage persistently reaches the Preset Time more than second persistent period of the preset upper limit voltage, then also from described the Two control ends CTL2 export cut-off signal.

In the present embodiment, for the voltage or electric current needed for driving load circuit, if the signal of telecommunication of the output of battery core 65 Can meet, then when the second persistent period timing is to the Preset Time main control module 61 to second switch module 69 output cut-off signals, to disconnect the power supply of 64 pairs of load blocks 66 of the supply module, realization is carried out greatly to battery core 65 The repid discharge of electric current.

Specifically, to the timing of the second persistent period within the first persistent period, once the second persistent period timing is arrived The Preset Time, then main control module 61 exports cut-off signal from first control end CTL1 immediately, while controlling from the 3rd End CTL3 output communications signals, also simultaneously from the second control end CTL2 output cut-off signal；Stop passing through the supply module 64 Charging of the charging signals of output to the battery core 65, while stopping by the drive signal of the output of the supply module 64 to institute The power supply of load blocks 66 is stated, while powering by 65 pairs of load blocks 66 of the battery core.

As a preferred second switch module 69 of the invention, as shown in Fig. 2 the second switch module 69 is connected on institute State between the feeder ear SU+ of supply module 64 and the load blocks 66.In addition, the second switch module 69 has the 3rd to open End K3, the 4th switch terminals K4 and the second controlled end C2 are closed, the 3rd switch terminals K3 are corresponding with the 4th switch terminals K4 to meet institute State the feeder ear SU+ of supply module 64 and the first power end VC1 of the load blocks 66, the second control of the main control module 61 End CTL2 processed meets the second controlled end C2 of the second switch module 69.The second switch module 69 is from second controlled end C2 disconnects the electrical connection of the 3rd switch terminals K3 and the 4th switch terminals K4 when receiving cut-off signal, that is, disconnect the confession The feeder ear SU+ of electric module 64 and the first power end VC1 of the load blocks 66, and then disconnect described 64 pairs of institutes of supply module The current supply circuit of the power supply of load blocks 66 is stated, stops the power supply by the drive signal to the load blocks 66.

Specifically, when cut-off signal is received from the second controlled end C2, the 3rd switch terminals K3 are disconnected with described the The electrical connection of four switch terminals K4, that is, disconnect the feeder ear SU+ of the supply module 64 and the first power supply of the load blocks 66 The electrical connection of end VC1, the current supply circuit for disconnecting 64 pairs of power supplies of the load blocks 66 of the supply module stops by the confession Power supply of the drive signal of the output of electric module 64 to the load blocks 66.If on the contrary, received from the second controlled end C2 Communications signals, the 3rd switch terminals K3 are electrically connected with the 4th switch terminals K4, set up the power supply of the supply module 64 The electrical connection of end SU+ and the first power end VC1 of the load blocks 66, forms described 64 pairs of load blocks of supply module The current supply circuit of 66 power supplies, the drive signal exported by the supply module 64 is powered to the load blocks 66.

In embodiments of the present invention, the main control module 61 specifically for：In the magnitude of voltage for detecting less than default During lower voltage limit, communications signals are exported to the first switch module 62, and letter is disconnected to the 3rd switch module 63 output Number, also export communications signals to the second switch module 69；Accordingly, the second switch module 69 is additionally operable to：Receiving To the output of the main control module 61 communications signals when, connect the power supply of 64 pairs of power supplies of the load blocks 66 of the supply module Loop.

Used as a preferred main control module 61 of the invention, the real-time reception voltage detection module 67 of the main control module 61 is exported Magnitude of voltage；The main control module 61 the magnitude of voltage be less than pre-determined lower limit voltage when, also from second control end CTL2 Output communications signals；Accordingly, the second switch module 69 from the second controlled end C2 receive communications signals when by institute State the 3rd switch terminals K3 to electrically connect with the 4th switch terminals K4, connect described 64 pairs of load blocks 66 of supply module and power Current supply circuit, the load blocks 66 are powered by the drive signal.

Specifically, during stopping charging battery core 65 and battery core 65 being discharged by load blocks 66, yet by Voltage detection module 67 is persistently detected to the voltage of battery core 65, while the main control module 61 is received from the first test side T1 The magnitude of voltage for detecting of the output of voltage detection module 67, whether the magnitude of voltage detected described in real-time judge is less than default Lower voltage limit, once the magnitude of voltage for detecting is less than pre-determined lower limit voltage, then connects from first control end CTL1 output Messenger, and communications signals are received from second control end CTL2, and disconnect letter from the 3rd control end CTL3 output Number；

Further, the first switch module 62 is receiving main control module 61 from the described first control by the first controlled end C1 During the communications signals of CTL1 outputs in end processed, the charging signals exported by the supply module 64 are charged to the battery core 65.Institute State the 3rd switch module 63 and receiving what main control module 61 was exported from the 3rd control end CTL3 by the 3rd controlled end C3 During cut-off signal, stop the power supply by 65 pairs of load blocks 66 of the battery core.The voltage of battery core 65 is maintained at into this pre- Set more than voltage limit, play a part of stand-by power supply.At the same time, for main control module 61 is from second control end CTL2 The communications signals of output, the second switch module 69 can receive the communications signals from the second controlled end C2, and then set up institute The electrical connection of the 3rd switch terminals K3 and the 4th switch terminals K4 is stated, described 64 pairs of load blocks 66 of supply module is connected and is supplied The current supply circuit of electricity, the drive signal exported by the supply module 64 is powered to the load blocks 66；Will be by battery core 65 Mode for the power supply of load blocks 66 switches back into the mode powered for load blocks 66 by supply module 64.

In an embodiment of the present invention, the 3rd switch terminals K3 and the 4th switch terminals K4 of second switch module 69 are always maintained at Electrical connection；In the case of by battery core 65 to the electric discharge of load blocks 66, charging of the module of stopping power supply 64 to battery core 65, together When battery core 65 is discharged by load blocks 66, but the drive signal for not stopping being exported by supply module 64 be load circuit supply Electricity.But, main control module 61 can send adjust instruction to supply module 64, and supply module 64 drives according to the adjust instruction adjustment The electric current of signal, voltage or power, the drive signal from after the 3rd control end CTL3 output adjustment.Under normal circumstances, power supply mould Block 64 reduces the curtage of drive signal according to the adjust instruction so that the drive signal after adjustment can only drive division The load circuit divided in load blocks 66, and another part load circuit in load blocks 66 is powered and is driven by battery core 65. So, even if interior second persistent period timing is to Preset Time between continuing first, stopping is charged to battery core 65, battery core 65 by the fractional load circuit discharging in load blocks 66.

In a preferred embodiment, for first switch module 62, the second switch module 69 that the present invention is provided Realized using electrical switch with the 3rd switch module 63.Used as a preferred implementation, the electrical switch includes but does not limit In：One kind in the devices such as IGCT, transistor, field effect transistor, controllable silicon and relay or the on-off circuit being combined into.Make For a preferred implementation, the also addition in first switch module 62, the switch module 63 of second switch module 69 and the 3rd respectively There is physical switch, artificially can be controlled whether first switch end K1 and described by the physical switch in first switch module 62 Two switch terminals K2 are electrically connected, artificially can be controlled whether the 3rd switch terminals K3 by the physical switch in second switch module 69 and The 4th switch terminals K4 electrical connection, artificially can be controlled whether the 5th switch by the physical switch in the 3rd switch module 63 End K5 is electrically connected with the 6th switch terminals K6.So, by above-mentioned physical switch can artificially to first switch module 62, The switch module 63 of second switch module 69 and the 3rd carries out emergency flight control, and it is right to be realized by the physical switch of first switch module 62 Whether carry out emergency flight control, by the physical switch of second switch module 69 if the battery core 65 being charged by the charging signals Realize powering the load blocks 66 by the drive signal to whether and carry out emergency flight control, by the 3rd switch module 63 Physical switch realize being powered by 65 pairs of load blocks 66 of the battery core to whether and carry out emergency flight control.

In an embodiment of the present invention, the main control module 61 includes timing module.In the present embodiment, for temperature is examined The temperature value of the output of module 68 is surveyed, the timing module is persistently counted to the temperature value higher than the time of the preset upper limit temperature When and obtain first persistent period；For the magnitude of voltage of the output of voltage detection module 67, the timing module is to the electricity Pressure value is persistently more than the time timing of the preset upper limit voltage and obtains second persistent period.It is emphasized that described Main control module 61 continues when the temperature value is less than the preset upper limit temperature by described the first of timing module record Time is set to zero, continues described the second of timing module record when the magnitude of voltage is less than the preset upper limit voltage Time is set to zero.

In the present embodiment, the timing module is used for the timing of the first persistent period, is additionally operable to the second persistent period Timing.Specifically, after device power work, temperature detecting module 68 can persistently detect the temperature of battery core 65, and main control module 61 is held It is continuous that the temperature value detected described in the output of temperature detecting module 68 is received from the second test side T2, once the temperature for detecting Angle value is more than preset upper limit temperature, and timing module starts to the timing of the first persistent period；In the mistake to the timing of the first persistent period Cheng Zhong, once the temperature value for detecting is less than preset upper limit temperature, by the first persistent period zero is set to；Then, described When the temperature value for detecting reaches preset upper limit temperature again, restart the timing to the first persistent period.

In the same manner, voltage detection module 67 is persistently detected to the voltage of battery core 65；Main control module 61 continues from the first inspection Survey the magnitude of voltage for detecting of the output of end T1 receiving voltages detection module 67, the magnitude of voltage detected described in real-time judge is It is no more than preset upper limit voltage；Once the magnitude of voltage for detecting is more than preset upper limit voltage, timing module starts to second Persistent period timing；During to the timing of the second persistent period, once the magnitude of voltage for detecting is less than preset upper limit Voltage, by the second persistent period zero is set to；Then, when the magnitude of voltage for detecting reaches preset upper limit voltage again, weight Newly start the timing to the first persistent period.

But it is emphasized that the main control module 61 obtains the first persistent period and the second persistent period from clock module, Judged for the first persistent period whether more than Preset Time；When the first persistent period Preset Time was more than, second is determined whether Whether persistent period is more than Preset Time, if the second persistent period is also greater than Preset Time, the ability of main control module 61 is from described the One control end CTL1 exports cut-off signal, and exports communications signals from the 3rd control end CTL3；Only continue first When time and the second persistent period exceed Preset Time simultaneously, the ability of main control module 61 disconnects from first control end CTL1 output Signal, and export communications signals from the 3rd control end CTL3.

Used as one embodiment of the invention, the main control module 61 is realized by controller, and the controller can be：Single-chip microcomputer, ARM Processor or PLD.At the same time, the timing that the timing module in the main control module 61 is also carried for controller Module；Preferably, elapsed time clock is provided for the timing module by external crystal oscillation clock circuit.

Used as one embodiment of the invention, the main control module 61 is the hardware circuit being made up of electronic devices and components and chip. It is by the comparison inside main control module 61 preferably for the judgement of the temperature value for detecting and temperature upper limit threshold value Circuit realiration；In the same manner, it is logical for the judgement of the magnitude of voltage for detecting and upper voltage limit threshold value or lower voltage limit threshold value What the comparison circuit crossed inside main control module 61 was realized.Meanwhile, the clock module is also to be made up of timing chip and peripheral circuit Timing circuit；Then it is by timing circuit reality for whether the first persistent period or the second persistent period reach Preset Time Existing；As a specific embodiment, first signal is exported when the first persistent period Preset Time was reached, held second Continuous time exports a secondary signal when reaching Preset Time, main control module 61 be sequentially received first signal and this second Just from first control end CTL1 output cut-off signal during signal, and communications signals are exported from the 3rd control end CTL3.

It should be noted that, battery core protection circuit provided in an embodiment of the present invention and battery core guard method can mutually be suitable for.It is logical The method and step that Fig. 3 shows battery core guard method is crossed, and the part related to the embodiment of the present invention is only shown.

A kind of battery core guard method provided in an embodiment of the present invention, such as Fig. 3, the battery core guard method includes：

S1, obtains the magnitude of voltage and temperature value of battery core；

S2, it is determined that within the temperature value the first persistent period persistently higher than preset upper limit temperature, if the voltage Value persistently reaches Preset Time more than the second persistent period of preset upper limit voltage, then the battery core is discharged, wherein, institute Stated for the first persistent period more than or equal to the Preset Time.

On basis based on the battery core guard method shown in Fig. 3, Fig. 4 is optimized to the battery core guard method, and The part related to the embodiment of the present invention is shown.

In an embodiment of the present invention, as shown in figure 4, the battery core guard method also includes：

S3, when the magnitude of voltage is less than pre-determined lower limit voltage, is charged to the battery core.

In an embodiment of the present invention, the battery core guard method also includes：

When the temperature value is less than the preset upper limit temperature, first persistent period is set to into zero；

When the magnitude of voltage is less than the preset upper limit voltage, second persistent period is set to into zero.

It should be noted that, battery core protection circuit provided in an embodiment of the present invention and battery core guard method can mutually be suitable for.Need Illustrate, in the battery core protection circuit that another battery core guard method provided in an embodiment of the present invention is used, first switch Module 62 is serially connected between supply module 64 and battery core 65, can be controlled whether by supply module 64 by first switch module 62 The charging signals of output charge to battery core 65；With the 3rd switch module 63 is serially connected between battery core 65 and load blocks 66, can be led to Cross the 3rd switch module 63 to control whether to power load blocks 66 by battery core 65；And, second switch module 69 is connected on Between supply module 64 and load blocks 66, can control whether that by supply module 64 be load mould by second switch module 69 Block 66 is powered.Battery core guard method provided in an embodiment of the present invention includes：

A11, supply module 64 accesses the signal of telecommunication, and the signal of telecommunication to accessing carries out signal adjustment and adjusts out driving letter respectively Number and charging signals, export the drive signal to load blocks 66 to drive the load blocks 66 to work, it is defeated to battery core 65 Go out the charging signals to charge the battery core 65；

A12, voltage detection module 67 detects the voltage of the battery core 65, and the voltage detected to the output of main control module 61 Value；

A13, temperature detecting module 68 detects the temperature of the battery core 65, and exports what is detected to the main control module 61 Temperature value；

A14, the main control module 61 receives the temperature value for detecting of the output of the temperature detecting module 68, receives The magnitude of voltage for detecting of the output of the voltage detection module 67, is higher than persistently on default in the temperature value for detecting If the magnitude of voltage for detecting persistently continues more than the second of preset upper limit voltage in the first persistent period of limit temperature Between reach Preset Time, then to first switch module 62 export cut-off signal, and to the 3rd switch module 63 output connection letter Number；

A15, the first switch module 62 disconnects the supply module 64 when cut-off signal is received with the battery core 65 electrical connection, to stop the charging by the charging signals of the output of the supply module 64 to the battery core 65；

A16, the 3rd switch module 63 is when communications signals are received by the battery core 65 and the load blocks 66 Electrical connection, to be powered by 65 pairs of load blocks 66 of the battery core.

On the basis of above-mentioned battery core guard method, in a preferred embodiment, the battery core guard method is also Including：

A21, the main control module 61 is opened when the magnitude of voltage for detecting is less than pre-determined lower limit voltage to described first The output communications signals of module 62 are closed, and cut-off signal is exported to the 3rd switch module 63；

A22, the first switch module 62 is when communications signals are received by the first switch end K1 and described second Switch terminals K2 are electrically connected, to be charged to the battery core 65 by the charging signals；

A23, the 3rd switch module 63 disconnects the battery core 65 when cut-off signal is received with the load blocks 66 electrical connection, to stop the power supply by 65 pairs of load blocks 66 of the battery core.

On the basis of above-mentioned battery core guard method, in a preferred embodiment, the battery core guard method is also Including：

The main control module 61 is in the temperature value for detecting persistently higher than described the first of the preset upper limit temperature In persistent period, if the magnitude of voltage for detecting persistently reaches more than second persistent period of the preset upper limit voltage To the Preset Time, then also cut-off signal is exported to second switch module 69；

The second switch module 69 disconnects the supply module 64 when cut-off signal is received with the load blocks 66 electrical connection, to stop the power supply by the drive signal of the output of the supply module 64 to the load blocks 66.

On the basis of above-mentioned battery core guard method, in a preferred embodiment, the battery core guard method is also Including：

The main control module 61 the magnitude of voltage for detecting be less than pre-determined lower limit voltage when, also to the second switch Module 69 exports communications signals；

The second switch module 69 is when communications signals are received by the supply module 64 and the load blocks 66 The load blocks 66 are powered by electrical connection with the drive signal exported by the supply module 64.

On the basis of above-mentioned battery core guard method, in a preferred embodiment, the battery core guard method is also Including：

The timing module that the main control module 61 includes, is higher than persistently the preset upper limit to the temperature value for detecting The time timing of temperature simultaneously obtains first persistent period, and to the magnitude of voltage for detecting the preset upper limit is persistently more than The time timing of voltage simultaneously obtains second persistent period；

The main control module 61 is when the temperature value for detecting is less than the preset upper limit temperature by the timing mould First persistent period of block record is set to zero；

The main control module 61 is when the magnitude of voltage for detecting is less than the preset upper limit voltage by the timing mould Second persistent period of block record is set to zero.

Above content is to combine specific preferred implementation further description made for the present invention, it is impossible to assert The present invention be embodied as be confined to these explanations.For general technical staff of the technical field of the invention, Some equivalent substitutes or obvious modification are made on the premise of without departing from present inventive concept, and performance or purposes are identical, all should It is considered as belonging to the scope of patent protection that the present invention is determined by the claims submitted to.

Claims (8)

1. a kind of battery core protection circuit, including supply module, load blocks, voltage detection module, temperature detecting module and battery core, The battery core connects respectively with the supply module, the load blocks, the voltage detection module and the temperature detecting module Connect, it is characterised in that the battery core protection circuit also includes main control module, first switch module and the 3rd switch module；It is described First switch module is connected between the supply module and the battery core, the 3rd switch module be connected to the battery core with Between the load blocks, the main control module respectively with the voltage detection module, the temperature detecting module, described first Switch module and the 3rd switch module connect；

The main control module is used for：Receive the voltage that the voltage detection module carries out obtained by voltage detecting to the battery core Value, the reception temperature detecting module carries out the temperature value obtained by temperature detection to the battery core；The main control module is also used In：It is determined that within the temperature value the first persistent period persistently higher than preset upper limit temperature, if the magnitude of voltage continues greatly Preset Time is reached in the second persistent period of preset upper limit voltage, then exports cut-off signal to the first switch module, and Communications signals are exported to the 3rd switch module；

The first switch module is used for：When the cut-off signal of the main control module output is received, the power supply mould is disconnected The charge circuit that block charges to the battery core；

3rd switch module is used for：When the communications signals of the main control module output are received, the battery core pair is connected The current supply circuit of the power load modules.

2. battery core protection circuit as claimed in claim 1, it is characterised in that

The main control module is additionally operable to：When the magnitude of voltage is less than pre-determined lower limit voltage, to first switch module output Communications signals, and export cut-off signal to the 3rd switch module；

The first switch module is additionally operable to：When the communications signals of the main control module output are received, the power supply is connected The charge circuit that module charges to the battery core；

3rd switch module is additionally operable to：When the cut-off signal of the main control module output is received, the battery core is disconnected Current supply circuit to the power load modules.

3. battery core protection circuit as claimed in claim 1 or 2, it is characterised in that the battery core protection circuit also includes second Switch module；The second switch block coupled in series between the supply module and the load blocks, and with the master control mould Block connects；

The main control module specifically for：When the temperature value persistently continues higher than described the first of the preset upper limit temperature It is interior, if the magnitude of voltage persistently reaches described default more than second persistent period of the preset upper limit voltage Between, then cut-off signal is exported to the first switch module, communications signals are exported to the 3rd switch module, also to described the Two switch modules export cut-off signal；

The second switch module is used for：When the cut-off signal of the main control module output is received, the power supply mould is disconnected Current supply circuit of the block to the power load modules.

4. battery core protection circuit as claimed in claim 3, it is characterised in that the main control module specifically for：In the electricity When pressure value is less than pre-determined lower limit voltage, communications signals are exported to the first switch module, and it is defeated to the 3rd switch module Go out cut-off signal, also export communications signals to the second switch module；

The second switch module is additionally operable to：When the communications signals of the main control module output are received, the power supply is connected Current supply circuit of the module to the power load modules.

5. battery core protection circuit as claimed in claim 1 or 2, it is characterised in that the main control module includes timing module；

The timing module is used for：To the temperature value persistently higher than the preset upper limit temperature time timing and obtain described First persistent period, to the magnitude of voltage persistently more than the preset upper limit voltage time timing and obtain described second continue Time；

The main control module is additionally operable to：The timing module is recorded when the temperature value is less than the preset upper limit temperature First persistent period is set to zero, records the timing module when the magnitude of voltage is less than the preset upper limit voltage Second persistent period is set to zero.

6. a kind of battery core guard method, it is characterised in that the battery core guard method includes：

Obtain the magnitude of voltage and temperature value of battery core；

It is determined that within the temperature value the first persistent period persistently higher than preset upper limit temperature, if the magnitude of voltage continues greatly Preset Time is reached in the second persistent period of preset upper limit voltage, is then controlled the battery core and is discharged, wherein, described first Persistent period is more than or equal to the Preset Time.

7. battery core guard method as claimed in claim 6, it is characterised in that the battery core guard method also includes：

When the magnitude of voltage is less than pre-determined lower limit voltage, the battery core is charged.

8. battery core guard method as claimed in claims 6 or 7, it is characterised in that the battery core guard method also includes：

When the temperature value is less than the preset upper limit temperature, first persistent period is set to into zero；

When the magnitude of voltage is less than the preset upper limit voltage, second persistent period is set to into zero.