CN103036271A - Charger - Google Patents
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- CN103036271A CN103036271A CN2012103673748A CN201210367374A CN103036271A CN 103036271 A CN103036271 A CN 103036271A CN 2012103673748 A CN2012103673748 A CN 2012103673748A CN 201210367374 A CN201210367374 A CN 201210367374A CN 103036271 A CN103036271 A CN 103036271A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a charger capable of running over two abnormal systems of itself within a safe range to reliably protect an external secondary battery when a prescribed signal is received from the outside. When a low-efficiency overvoltage B signal is input from a signal terminal (610), MOSFETs (62, 66, 68) are blocked. Therefore, a supply part (5) blocking a signal is exerted on a control terminal (52) to make an output of a charging voltage invalid and further make an MOSFET (55) blocked. A charging path is then cut off. When the overvoltage B signal is not input and a control part (8) having an I/O port (87) is in a non-running state, the supply part (5) makes the output of the charging voltage invalid or a minimum battery number is set in a battery number setting terminal (53) to reduce the charging voltage or make the MOSFET (55) blocked. Therefore, the charging path is cut off.
Description
Technical field
The present invention relates to the battery pack that is used for the regulation signals such as output abnormality signal is applied the charger that charging voltage is charged.
Background technology
In recent years, along with the energy density of secondary cell and the periodicity that can discharge and recharge increase, and to the improvement of various characteristics, use the situation of secondary cell also increasing.Usually, secondary cell is accommodated in the housing with peripheral circuits such as charge-discharge circuit, voltage detecting circuit, protective circuits, thereby is used as battery pack (Battery pack).Especially; as lithium ion battery; when secondary cell deteriorated or impaired possibility occurs when larger because of discharging and recharging with overvoltage under the large electric current (two-forty); preferably in adjacent with secondary cell as far as possible part, be that the inside of battery pack is detected the unusual of secondary cell as early as possible, be not subjected to deteriorated and impaired impact with the protection secondary cell.
On the other hand; for example; in with the purposes of motor as the electric tool of power source etc.; become for discharging and recharging under the two-forty in the situation of major premise; the inside that is difficult to be installed in by the cut-out element that current capacity is larger battery pack cuts off charging and discharging currents reliably, therefore seems particularly important in the safety Design take the protection of secondary cell as the charger side of purpose.
Yet, as a kind of method of protecting reliably, dual (duplicate protection) method is for example arranged.For example, when by the discharging and recharging of microcomputer control secondary cell, by using so-called supervisory circuit, the microcomputer (with reference to patent documentation 1) of when normal executive program, can resetting.Thus, detect the unusual of the processing that is performed along with program, carried out dual but be difficult to above-mentioned phenomenon is called.
With respect to this, a kind of battery pack is disclosed in patent documentation 2, this battery pack processes to detect the overvoltage of secondary cell by the software on hardware detecting circuit and the microcomputer, cut off respectively charge path, realizes thus duplicate protection.
The flat 9-258821 communique of [patent documentation 1] TOHKEMY
The flat 2010-110156 communique of [patent documentation 2] TOHKEMY
Yet patent documentation 1 disclosed technology only is to realize protection in battery pack side, nor this technology can be directly applied to the battery pack for purposes such as electric tools.
At this, in the prior art, when exporting a plurality of holding wire from battery pack, in the charger side secondary cell is carried out duplicate protection based on two abnormal signals that detect in battery pack side.Yet, in the time of will being restricted to one from the abnormal signal of battery pack output because of exchangeability problem etc., preferably starts based on this abnormal signal and the protection of the secondary cell implemented in the charger side and and automatic anti-fault processing enforcement unusual for charger self.
Summary of the invention
The present invention In view of the foregoing finishes; its purpose is to provide a kind of charger; this charger can utilize based on the protection system of the specified signal that receives from the outside and be provided in the unusual protection system of secure side operation self, the reliably outside secondary cell of protection.
Charger of the present invention is characterised in that, comprises the acceptance division that receives specified signal from the outside, and applies charging voltage to the charge path with respect to the outside, and this charger is characterised in that, comprising: switch, and it is switched on or switched off described charge path; Generation unit, it generates expression and self is in operating signal in service; And the switch control part, its in by this generation unit generating run signal during, disconnect described switch, when described acceptance division received described specified signal, this switch control part was connected described switch.
In the present invention, in the generation unit generating run signal during, the switch control part disconnects the switch on charge path.In addition, when receiving specified signal from the outside, the switch control part is connected described switch.
Thus, the position (generating the position hereinafter referred to as signal) that comprises at least generation unit be in moving during and do not input specified signal during, disconnect the switch of charge path.On the other hand, when signal generation position is in inoperative (not being the state of normal operation) or is transfused to specified signal, connect the switch of charge path, therefore forbid applying charging voltage to charge path.
Charger of the present invention is characterised in that, comprise the power supply unit that receives the acceptance division of specified signal from the outside and apply charging voltage to the charge path with respect to the outside, this charger is characterised in that, comprising: generation unit, and it generates expression and self is in operating signal in service; And power control part, its in by this generation unit generating run signal during, make described power supply unit generate described charging voltage, when described acceptance division received described specified signal, this power control part forbade that described power supply unit generates described charging voltage.
In the present invention, in the generation unit generating run signal during, with respect to the power supply unit that applies charging voltage to charge path, power control part generates charging voltage.In addition, when receiving specified signal from the outside, power control part forbids that power supply unit generates charging voltage.
Thus, signal generate the position be in service and do not input specified signal during, generate charging voltage and be applied to charge path by power supply unit.On the other hand, when signal generates the position and is in the inoperative (not being the state of normal operation) or inputted specified signal, stop power supply unit and generate charging voltage, therefore forbid applying charging voltage to charge path.
Charger of the present invention is characterised in that, described specified signal is to be illustrated in the signal that secondary cell that the outside should be recharged is in overvoltage condition.
In the present invention, when the secondary cell that receives the expression outside is in the signal of overvoltage condition, connects the switch on charge path or forbid the power supply unit generating power voltages.
Thus, secondary cell is controlled to the overvoltage condition that can not become as surpassing the cell voltage corresponding with above-mentioned signal.
Charger of the present invention comprises the 1st acceptance division that receives the 1st signal, the 2nd signal from the outside and the 2nd acceptance division and the power supply unit that applies charging voltage to the charge path with respect to the outside, this charger is characterised in that, comprise: generation unit, it generates expression and self is in operating signal in service; And power control part, its in by this generation unit generating run signal during, make described power supply unit generate charging voltage V2, wherein, described charging voltage V2 is the corresponding voltage of the 2nd signal that receives with described the 2nd acceptance division; When described the 1st acceptance division receive described the 1st signal or can't be by described generation unit generating run in during signal, this power control part makes described power supply unit generate the charging voltage V1 that is not more than described charging voltage V2.
In the present invention, in the generation unit generating run signal during, power control part is made as the charging voltage V2 corresponding with the 2nd signal that receives from the outside with the charging voltage that power supply unit generates.And when receiving the 1st signal or generation unit from the outside and do not have the generating run signal, the charging voltage that power control part generates power supply unit is made as voltage below the charging voltage V2, is charging voltage V1.
Thus, signal generate the position be in service and do not input the 1st signal during, the charging voltage that is generated by power supply unit becomes the charging voltage V2 corresponding with the 2nd signal.On the other hand, be in the inoperative or when having inputted the 1st signal when signal generates the position, the charging voltage that is generated by power supply unit becomes voltage below the charging voltage V2, is charging voltage V1, therefore can reduce charging voltage.
Charger of the present invention is characterised in that, described charging voltage V1 is the minimum charging voltage that described power supply unit can generate according to the 2nd signal.
In the present invention, power supply unit is made as charging voltage V1 according to the minimum charging voltage that the 2nd signal can generate.
Thus, the charging voltage that is generated by power supply unit becomes that predefined minimum charging voltage for the secondary cell of outside, is worked corresponding to the 2nd signal in safe range.
Charger of the present invention is characterised in that, described the 2nd signal is the signal that is illustrated in the number of batteries that secondary cell that the outside should be recharged possesses.
In the present invention, according to the number of batteries of outside secondary cell, generate charging voltage V1 and V2.
Thus, for example charging voltage V2 is generated as the voltage that is directly proportional with number of batteries.
Charger of the present invention is characterised in that, the signal in service that described generation unit generates is spike train.
In the present invention, the signal in service of generation unit generation is made of spike train.For the signal that is consisted of by spike train, as long as generation unit stops to generate, just can change having or not of pulse, therefore when the state at signal generation position when operating state becomes the inoperative state, generation unit does not need to process especially.
Thus, for example, even process in cut or the situation such as out of hand at software that generation unit comprises, the state of signal in service also can change.
Charger of the present invention is characterised in that to possess: control part, and it comprises microcomputer, and the charging of described battery pack is controlled, the signal in service that described generation unit generates is the signal that the processing by described microcomputer generates.
In the present invention, comprise that the control part of microcomputer is controlled charging, and signal in the generating run.
Thus, when charging control stopped or is malfunctioning, the possibility that signal in service becomes signal in the inoperative can obviously increase.
(invention effect)
According to the present invention, when having inputted specified signal (perhaps the 1st signal) when the signal in service that can't be created on inner generation or from the outside, stop to apply charging voltage or reducing charging voltage to charge path.
Thereby, can by utilize based on the protection system of the specified signal operation that receives from the outside and in safe range the unusual protection system of operation self protect reliably outside secondary cell.
Description of drawings
Fig. 1 is the block diagram of the configuration example of the charger of expression by embodiments of the present invention 1 battery pack of charging.
Fig. 2 is the block diagram of configuration example of the charger of expression embodiments of the present invention 1.
A among Fig. 3 is the sequential chart of the action of the MOSFET when for explanation capacitor being applied spike train, and the B among Fig. 3 is the sequential chart of the action of the MOSFET when not applying spike train for explanation.
Fig. 4 is the block diagram of configuration example of the charger of expression embodiments of the present invention 2.
Symbol description:
1... secondary cell; 11,12,13,14... element cell; 2... protection IC; 4... control part; 40...CPU; 200,201... charger; 5... power supply unit; (55...MOSFET switch); 61,62...MOSFET (part of (the 1st) power control part); 71,73... capacitor (part of (the 1st) power control part); 72... diode (part of (the 1st) power control part); 63,64,65,66...MOSFET (part of the 2nd power control part); 74,76... capacitor (part of the 2nd power control part); 75... diode (part of the 2nd power control part); 67,68...MOSFET (part of switch control part); 77,79... capacitor (part of switch control part); 78... diode (part of switch control part); 8... control part (microcomputer); 80...CPU; 83...I/O port ((the 1st) acceptance division); 86... Department of Communication Force (the 2nd acceptance division); 87...I/O port (part of generation unit); 91... one-shot multivibrator (part of (the 1st) power control part); 92... one-shot multivibrator (part of the 2nd power control part); 92... one-shot multivibrator (part of switch control part).
Embodiment
Below, based on the accompanying drawing of expression embodiments of the present invention, describe the present invention in detail.
(execution mode 1)
Fig. 1 is the block diagram of the configuration example of the charger of expression by embodiments of the present invention 1 battery pack of charging.Among the figure 100 is battery pack, and battery pack 100 comprises secondary cell 1, and this secondary cell 1 is connected in series these element cells with the element cell 11,12,13 that is made of lithium ion battery, 14 order and forms.Secondary cell 1 can also be other batteries such as Ni-MH battery, nickel-cadmium cell.In addition, the quantity (number of batteries) that consists of the element cell of secondary cell 1 is not limited to 4, for example can also be 5 or 7.
The positive pole of element cell 11 is connected with just (+) terminal 18 that exposes to the outside of not shown housing.The negative pole of element cell 14 is connected with negative (-) terminal 19 that exposes to outside via the current sense resistor 440 for detection of the charging and discharging currents of secondary cell 1. Element cell 11,12,13,14 two ends separately respectively with detect whether the unit battery is in the input terminal of protection IC2 of overvoltage condition and the input terminal of AFE (analog front end) (Analogue Front End is hereinafter referred to as AFE) 3 connects.The detection signal terminal 20 of protection IC2 is connected with the grid of the N channel-type MOSFET21 of source ground, and the drain electrode of MOSFET21 is connected with signal terminal 210.
Protection IC2 particularly including: to element cell 11,12,13,14 cell voltage and the reference voltage comparator and the onboard clock (all not shown) that compare separately.Reference voltage is 4.35V in the present embodiment, but is not limited to this.When element cell 11,12,13,14 cell voltage during greater than 4.35V, each comparator generates and makes onboard clock begin the internal signal of timing.Then, when the time of each onboard clock institute timing has for example been passed through 1.5 seconds, detect secondary cell 1 and be in overvoltage condition, gate electrode from from detection signal terminal 20 to MOSFET21 applies Continuity signal, so that the MOSFET21 conducting, thus from the low effective overvoltage B signal of signal terminal 210 outputs.
AFE3 selects an element cell according to the above-mentioned selection signal that applies from I/O port 43 from element cell 11,12,13,14, and the cell voltage of selected element cell is applied to A/D converter 44.
The cell voltage that A/D converter 44 will apply from AFE3 and the both end voltage of current sense resistor 440 are converted to digital voltage value.
CPU40 is according to pre-stored control program in ROM41, implement the calculating of the surplus of secondary cell 1, judgement that whether secondary cell 1 is in overvoltage condition, via Department of Communication Force 46 with the outside between the processing such as communicate by letter.
For example, CPU40 obtains the both end voltage of current sense resistor 440 according to time series via A/D converter 44, and the charging and discharging currents that totally converses according to the voltage that obtains, thereby calculates the surplus of secondary cell 1.
In addition, CPU40 detects from AFE3 to A/D converter 44 element cells that apply 11, each cell voltage of 12,13,14 according to time series, the cell voltage of the maximum in the cell voltage of determining to detect, for example, when determined cell voltage during greater than 4.25V, from I/O port 43 via signal terminal 430 to outside output over-voltage a-signal.Can also with overvoltage B signal similarly via MOSFET output over-voltage a-signal.
Next, the charger that battery pack 100 is charged is described.
Fig. 2 is the block diagram of configuration example of the charger of expression embodiments of the present invention 1.Among the figure, the 200th, charger, charger 200 comprises power supply unit 5,5 pairs of alternating voltages of supplying with from source power supply 300 of this power supply unit carry out generating charging voltage after rectification and the stabilisation.
The lead-out terminal of the side of the positive electrode of the power supply unit 5 of output charging voltage is via source electrode and the drain electrode of P channel-type MOSFET55, is connected on just (+) terminal 58 that exposes to the outside of not shown housing.The lead-out terminal of the negative side of power supply unit 5 is connected to bearing on (-) terminal 59 of exposing to the outside of housing.Consist of charge path with respect to battery pack 100 via MOSFET55 to the circuit of plus end 58 and the circuit from the lead-out terminal of the negative side of power supply unit 5 to negative terminal 59 from the lead-out terminal of the side of the positive electrode of power supply unit 5.
Power supply unit 5 has the control terminal 52 for the on/off of the output of control charging voltage, has connected the drain electrode of the MOSFET61 of N channel-type (except MOSFET55, lower same) at this this control terminal 52.Control terminal 52 is pulled up (pull up) in the inside of power supply unit 5.The connection signal that inputs to control terminal 52 is low useful signal.The source electrode of MOSFET61 is connected on the drain electrode of MOSFET62 of source ground, has connected capacitor 71 between the gate electrode of MOSFET61 and earthing potential.Connecting MOSFET61,62 order for the earthing potential cascade can also opposite with situation shown in Figure 2 (together lower).
Power supply unit 5 comprises that also number of batteries sets terminal 53,54, and number of batteries is set the quantity that terminal 53,54 is used for setting the element cell that consists of the secondary cell 1 that battery pack 100 possesses.Set terminal 53,54 in this number of batteries and connected MOSFET63,64 drain electrode.Number of batteries is set terminal 53,54 and is pulled up in the inside of power supply unit 5.MOSFET63,64 source electrode are connected on the drain electrode of MOSFET65.The source electrode of MOSFET65 is connected to the drain electrode of the MOSFET66 of source ground, has connected capacitor 74 between the gate electrode of MOSFET65 and earthing potential.
The mode that connects by bus on CPU80 further is connected with I/O port 87 and I/O port 88, wherein, I/O port 87 be used for via capacitor 73,76,79 and diode 72,75,78 series circuit MOSFET61,65,67 gate electrode are applied spike train (signal in service), I/O port 88 is used for MOSFET63,64 gate electrode are applied the conduction and cut-off signal.I/O port 88 has also connected the setting parameter terminal 50 that is used for power supply unit 5 is set the control parameter of charging.Above-mentioned spike train can by CPU80 approximate period property make from I/O port 87 be applied to respectively capacitor 73,76,79 signal on/off obtains.
When in above-mentioned charger 200 battery pack 100 being installed, the plus end 58 of charger 200, negative terminal 59, signal terminal 610 and 830, communication terminal 860 are connected to respectively plus end 18, negative terminal 19, signal terminal 210 and 430, the communication terminal 460 of battery pack 100.By connecting communication terminal 860 and 460, between Department of Communication Force 46 and 86, begin communication.In the present embodiment, between Department of Communication Force 46 and 86, carry out single-wire asynchronous serial communication based on 1-WIRE (registered trade mark) agreement.Below, so that being installed at charger 200, battery pack 100 describes as prerequisite.
CPU80 is according to pre-stored control program in ROM81, carry out via Department of Communication Force 86,46 with battery pack 100 between communicate by letter and based on the processing such as charging control of the secondary cell 1 of result of communication.
For example, when having specified charging current in communication, CPU80 sets charging current from 50 pairs of power supply units of setting parameter terminal 5.In addition, when CPU80 has received overvoltage a-signal from signal terminal 830 input, make the MOSFET55 cut-off, the parameter of the regulation that perhaps sets according to setting parameter terminal 50 makes power supply unit 5 reduce charging current.
In addition, charger 200 has three circuit that comprise two MOSFET that cascade connects.Wherein, will comprise that the circuit of MOSFET61 and 62, capacitor 71, diode 72 and capacitor 73 is example, above-mentioned action will be described.
In addition, between the negative electrode of diode 72 and earthing potential, be connected with resistor R71, between anode and earthing potential, be connected with R73.Resistor R71, R73 are be used to the resistance that makes capacitor 71,73 discharges.Relation between the time constant that determines according to the time constant that is determined by capacitor 71 and resistor R71 and by capacitor 73 and resistor R73 should be subject to certain restrictions from ON time and the pulse spacing that I/O port 87 is applied to each pulse the spike train of capacitor 73.The diode 75 and 78, capacitor 74 and 77, capacitor 76 and 79 etc. that comprise other circuit of two MOSFET also are same, and therefore description thereof is omitted.
A among Fig. 3 is the sequential chart of the action of the MOSFET61 when for explanation capacitor 73 being applied spike train, and the B among Fig. 3 is the sequential chart of the action of the MOSFET61 when not applying spike train for explanation.In the accompanying drawings, transverse axis represents the time, and the longitudinal axis from top to bottom among each width of cloth figure represents an end is connected to the spike train that the capacitor 73 on the anode of diode 72 applies, grid voltage and the drain voltage of MOSFET61 successively.Wherein, will be designated as drain voltage with respect to the drain electrode current potential of source electrode potential, the drain voltage in the time of will making MOSFET61 conducting (perhaps cut-off) is designated as cut-ff voltage (perhaps conducting voltage).
Among the A among Fig. 3, take moment t1 as starting point, apply spike train from 87 pairs of capacitors 73 of I/O port.The rising edge of each pulse is charged via 72 pairs of capacitors 71 of diode by differential and differential voltage at capacitor 73, thereby the both end voltage of capacitor 71, is that the grid voltage of MOSFET61 rises.At moment t2, when the both end voltage of capacitor 71 had surpassed the conduction threshold of MOSFET61, MOSFET61 was switched on, thereby drain voltage becomes conducting voltage from cut-ff voltage.Thus, make conducting between the drain electrode of MOSFET61 and the source electrode.
On the other hand, the gate electrode of MOSFET62 is connected on the signal terminal 610, do not apply from battery pack 100 low effective overvoltage B signal during in, MOSFET62 is switched on, thereby makes conducting between drain electrode and the source electrode.Namely, apply from 87 pairs of capacitors 73 of I/O port spike train and overvoltage B signal be not input to signal terminal 610 during, the drain electrode of MOSFET61 and earthing potential conducting apply low effective Continuity signal to control terminal 52, and it is effective that power supply unit 5 makes the output of charging voltage thus.
Among the B of Fig. 3, stop later on the spike train that applying to capacitor 73 at moment t3, capacitor 71 discharges by resistor R71, thereby the both end voltage of capacitor 71, is that the grid voltage of MOSFET61 reduces.When the both end voltage of capacitor 71 at moment t4 during less than the conduction threshold of MOSFET61, MOSFET61 is cut off, thus drain voltage becomes cut-ff voltage from conducting voltage.Thus, be cut off between the drain electrode of MOSFET61 and the source electrode.
On the other hand, when applying low effective overvoltage B signal from 100 couples of MOSFET62 of battery pack, MOSFET62 is cut off, and ends thereby make between drain electrode and the source electrode.Namely, in the time can't applying spike train or overvoltage B signal and be input to signal terminal 610 capacitor 73 from I/O port 87, the drain electrode of MOSFET61 and the conducting between the earthing potential are cut off, and control terminal 52 is applied pick-off signal, thereby power supply unit 5 makes the output of charging voltage invalid.
With take comprise MOSFET61,62 circuit as the situation that example describes identical, only be not input to from 87 pairs of capacitors 76 of I/O port, 79 input pulses row and overvoltage B signal signal terminal 610 during, MOSFET65,67 drain electrode and earthing potential conducting.Thus, MOSFET63,64 source electrode and earthing potential conducting, and L (low) level Continuity signal is applied to the grid of MOSFET55, thus make conducting between the source electrode of MOSFET55 and the drain electrode.
Below, outside not specifying, suppose that MOSFET61,65,67 drain electrode and earthing potential conducting describe.
Next, illustrate that setting terminal 53,54 for the setting parameter terminal 50 of power supply unit 5 and number of batteries sets the cell voltage of each element cell that consists of the secondary cell 1 that battery pack 100 possess and the method for element cell quantity.
By via the communication between Department of Communication Force 46,86 CPU40 that carry out, 80, CPU80 receives the kind of secondary cell 1 and consist of the element cell 11,12,13 of secondary cell 1,14 number of batteries (the 2nd signal is 4) in present embodiment 1.
CPU80 reads charging voltage with corresponding each element cell of the kind of secondary cell 1 from ROM81, is set the charging voltage of each element cell of reading by setting parameter terminal 50.CPU80 is also according to the number of batteries that receives, and applies the conduction and cut-off signal via 87 couples of MOSFET63 of I/O port, 64 gate electrode.Make thus MOSFET63,64 conduction and cut-off, and number of batteries is set terminal 53,54 set number of batteries.Particularly, set in the following manner in the present embodiment, but be not limited to this.
(a) number of batteries is 4 o'clock, makes MOSFET63,64 cut-offs.
Thus, number of batteries setting terminal 53,54 becomes H (height) level.
(b) number of batteries is 5 o'clock, only makes the MOSFET63 conducting.
Thus, number of batteries setting terminal 53,54 becomes L level, H level.
(c) number of batteries is 7 o'clock, only makes the MOSFET64 conducting.
Thus, number of batteries setting terminal 53,54 becomes H level, L level.
As mentioned above, when in number of batteries setting terminal 53,54, having set number of batteries, control terminal 52 is applied Continuity signal during, power supply unit 5 will fill Electricity voltage V2 and be set as the charging voltage of secondary cell 1 and exported, wherein, filling Electricity voltage V2 is that charging voltage to each element cell of being set by setting parameter terminal 50 multiply by in number of batteries and sets the number of batteries of setting in the terminal 53,54 and the voltage that obtains.
Wherein, especially when MOSFET65 or MOSFET66 are cut off, namely, in the time of can't applying spike train or overvoltage B signal and be input to signal terminal 610 to capacitor 76 from I/O port 87, no matter whether MOSFET63,64 is switched on/ends, and number of batteries is set terminal 53,54 and all become H level, H level.Therefore, it is the identical charging voltage V1 of 4 situation that power supply unit 5 is made as charging voltage with number of batteries, even therefore actual number of batteries is 5 or 7, charging voltage also can be decreased to safe range.
In addition, suppose the number of batteries in above-mentioned (a)-(c) is made as respectively 3,4,5, and being defined as number of batteries is to make in 7 o'clock in the situation of MOSFET63,64 equal conductings, if in the time of can't applying spike train or overvoltage B signal and be input to signal terminal 610 to capacitor 76 from I/O port 87, it is the identical voltage of 3 o'clock voltage that charging voltage becomes with number of batteries, therefore, in 4,5 or 7 the situation, also can make charging voltage be further reduced to safe range even in the number of batteries of reality be.
As mentioned above, according to present embodiment 1, do not export from I/O port 87 spike train during, MOSFET67,68 makes the MOSFET55 conducting on charge path.And when having inputted overvoltage B signal from battery pack 100, MOSFET68 makes the MOSFET55 cut-off.
Thus, moving and during overvoltage B signal (specified signal) was not transfused to, the MOSFET55 on the charge path (switch) was in conducting state when the control part 8 that comprises I/O port 87.On the other hand, when control part 8 is in the state of inoperative or has in the situation of input of overvoltage B signal, MOSFET55 is cut off, and therefore forbids applying charging voltage to charge path.
Therefore, by using the protection system of moving based on the specified signal that receives from the outside and in safe range, moving self unusual protection system, can protect reliably outside secondary cell.
In addition, when during I/O port 87 output spike trains, the control terminal 52 that MOSFET61,62 subtend charge paths apply the power supply unit 5 of charging voltage applies Continuity signal, thereby makes the output of charging voltage effective.In addition, when having inputted overvoltage B signal from battery pack 100, MOSFET62 applies pick-off signal to the control terminal 52 of power supply unit 5, makes the output of charging voltage invalid.
Thus, when the control part 8 that comprises I/O port 87 is moving and during overvoltage B signal (specified signal) is not transfused to, in power supply unit 5, generate charging voltage and be applied on the charge path.On the other hand, when control part 8 is in non-operating state or when having the input of overvoltage B signal, power supply unit 5 makes the output of charging voltage invalid, therefore forbids applying charging voltage to charge path.
Therefore, by using based on the protection system of the specified signal operation that receives from the outside with in the unusual protection system of safe range hiccup operation self, can protect reliably outside secondary cell.
And, when having received overvoltage B signal, make the MOSFET55 cut-off, and make the output of charging voltage invalid.
Therefore, can be controlled to secondary cell can not become as surpassing the overvoltage condition with the corresponding cell voltage of overvoltage B signal.
Further, during I/O port 87 output spike trains, the charging voltage conduct that MOSFET63,64,65,66 will generate in power supply unit 5 and the corresponding charging voltage V2 of the number of batteries that receives from battery pack 100 (the 2nd signal).In addition, when having inputted overvoltage B signal (the 1st signal) from battery pack 100, when perhaps not exporting spike train from I/O port 87, the charging voltages that MOSFET63,64 generates power supply unit 5 are made as voltage below the charging voltage V2, are charging voltage V1 (with number of batteries 4 corresponding voltages).
Therefore, when signal generated the position and is in non-operating state or is transfused to the 1st signal, the charging voltage that is generated by power supply unit became voltage below the charging voltage V2, is charging voltage V1, thereby reduces charging voltage.
Therefore, by using the protection system of moving based on the specified signal that receives from the outside and in safe range, moving self unusual protection system, can protect reliably outside secondary cell.
In addition, power supply unit 5 can be made as charging voltage V1 according to the minimum charging voltage (charging voltage when number of batteries is 4) that the number of batteries (the 2nd signal) of secondary cell 1 generates.
Therefore, the charging voltage that is generated by power supply unit becomes and the 2nd signal predefined minimum charging voltage accordingly, for the secondary cell of outside, can work in safe range.
Further, according to the number of batteries of secondary cell, generate charging voltage V1 and V2.
Therefore, can generate the voltage that is directly proportional with number of batteries, i.e. charging voltage V2
Further, consisted of by spike train from the signal (signal in service) of I/O port 87 outputs, as long as the generation of I/O port 87 stop signals, the stateless that has of pulse will change, therefore when the state of control part 8 from service when becoming inoperative, do not need to implement the special processing via I/O port 87.
Therefore, for example, process in cut or the out of control situation even signal generates the software at position, also signal in service can be become nonsensical signal.
In addition, charged by control part 8 controls that microcomputer consists of, and from I/O port 87 output spike trains (signal in service).
Therefore, can constitute: when the control of charging stopped or is out of hand, the possibility that signal in service becomes signal in the inoperative increased.
(execution mode 2)
Fig. 4 is the block diagram of configuration example of the charger 201 of expression embodiments of the present invention 2.At MOSFET61,65 gate electrode connection one-shot multivibrator 91,92 Q terminal, wherein, one- shot multivibrator 91,92 is by being triggered at the signal of T terminal input from 87 outputs of I/O port.Be connected with the Q terminal of one-shot multivibrator 93 at the gate electrode of MOSFET67, wherein, one-shot multivibrator 93 is by being triggered in the clock signal of T terminal input from output terminal of clock 51 outputs of power supply unit 5.When power supply unit 5 is in non-operating state, stop above-mentioned clock signal.
The resistor and the capacitor that are connected on the one- shot multivibrator 91,92,93 are that description is omitted for the time constant circuit that determines the single pulse width.
Below, in the Q connecting terminals is connected on one- shot multivibrator 91,92,93 on MOSFET61,65,67 the gate electrode, take MOSFET61 and one-shot multivibrator 91 as the above-mentioned action of example explanation.At this, suppose that overvoltage B signal is not input to signal terminal 610, and MOSFET62 is in conducting state.
In addition, in execution mode 1, be applied to the spike train of capacitor 73 ON time of each pulse and interpulsely be separated with certain restriction from I/O port 87.On the other hand, in present embodiment 2, when also long with the time interval that is input to the T terminal than the signal from 87 outputs of I/O port from suitable time of the single pulse width of Q terminal output, therefore MOSFET61 continues to be in conducting state, for should obviously being less than execution mode 1 from the restriction of the signal of I/O port 87 outputs.
Be in when in service at control part 8, for example by the low task of processing priority, from the irregular output triggering signals and it is applied to the T terminal of one-shot multivibrator 91 of I/O port 87.The single pulse of the time width that the one-shot multivibrator 91 that is triggered according to triggering signal is determined according to the time constant circuit that connects from the output of Q terminal.Until this single pulse cut-off as long as continue to apply next triggering signal to the T terminal from I/O port 87, just can make the Q terminal of one-shot multivibrator 91 keep H (height) level, so MOSFET61 also keeps conducting state.
When control part 8 is in inoperative (comprising the malfunctioning of software control) state, in the time of can not carrying out the low task of above-mentioned priority, also can after the process time suitable with the time width of single pulse, make the single pulse cut-off the latest, the Q terminal becomes L (low) level, thereby makes the MOSFET61 cut-off.Thus, in power supply unit 5, make the output of charging voltage invalid.
In addition, for the Reference numeral additional identical with part corresponding to execution mode 1, and omitted its detailed description.
As mentioned above, according to present embodiment 2, do not input overvoltage B signal and from I/O port 87 to one-shot multivibrator 91,92 T terminal output triggering signal during, the control terminal 52 that MOSFET61,62 subtend charge paths apply the power supply unit 5 of charging voltage applies Continuity signal makes the output of charging voltage effective, and MOSFET63,64,65,66 charging voltages that power supply unit 5 is generated are made as the charging voltage V2 corresponding with the number of batteries (4,5,7) that receives from battery pack 100.And, do not input overvoltage B signal and the T terminal clock signal from output terminal of clock 51 of power supply unit 5 to one-shot multivibrator 93 during, MOSFET67,68 makes the MOSFET55 conducting on charge path.
Thus, the control part 8 that comprises I/O port 87 be in operating during, be not transfused to overvoltage B signal (specified signal) during and the clock signal of out-put supply section 5 during, make MOSFET55 (switch) conducting on the charge path, and the charging voltage that is generated by power supply unit 5 becomes the charging voltage V2 corresponding with the number of batteries (the 2nd signal) of secondary cell 1.On the other hand, when control part 8 is in non-operating state, when perhaps not having clock signal from output terminal of clock 51, the charging voltage that is generated by power supply unit 5 becomes voltage below the charging voltage V2, is charging voltage V1, perhaps in power supply unit 5, make the output of charging voltage invalid, perhaps make the MOSFET55 cut-off.And when having inputted overvoltage B signal, MOSFET55 is cut off, and power supply unit 5 makes the output of charging voltage invalid, therefore forbids applying charging voltage to charge path, perhaps reduces charging voltage.
Therefore, by using the protection system of moving based on the specified signal that receives from the outside and in safe range, moving self unusual protection system, can protect reliably outside secondary cell.
In addition, in execution mode 1 and 2, from battery pack 100 output over-voltage a-signals, even but battery pack 100 does not possess the signal terminal 430 of output over-voltage a-signal, as long as from signal terminal 210 output over-voltage B signals, then charger 200,201 just can be realized function of the present invention.
In addition, in execution mode 1 and 2, by the communication of implementing via Department of Communication Force 86,46, kind and the number of batteries of the secondary cell 1 that reception battery pack 100 comprises, and determine thus charging voltage V2, but be not limited to this.For example, even in the situation that battery pack 100 does not comprise Department of Communication Force 46 and communication terminal 460, when the kind of the secondary cell 1 that the battery pack 100 in should being installed in charger 200,201 possesses and number of batteries are known, by processing accordingly with this kind with number of batteries, charger 200,201 is realized function of the present invention.
This disclosed execution mode only is illustration on structure at all levels, and being interpreted as not is restrictive content.Scope of the present invention should determine according to technical scheme, rather than determines according to above-mentioned explanation, and all should be included in the scope of the present invention in the meaning that is equal to technical scheme and all changes in the scope.
Claims (8)
1. a charger comprises the acceptance division that receives specified signal from the outside, and applies charging voltage to the charge path with respect to the outside, and this charger is characterised in that, comprising:
Switch, it is switched on or switched off described charge path;
Generation unit, it generates expression and self is in operating signal in service; And
The switch control part, its in by this generation unit generating run signal during, disconnect described switch,
When described acceptance division received described specified signal, this switch control part was connected described switch.
2. charger comprises the power supply unit that receives the acceptance division of specified signal from the outside and apply charging voltage to the charge path with respect to the outside, and this charger is characterised in that, comprising:
Generation unit, it generates expression and self is in operating signal in service; And
Power control part, its in by this generation unit generating run signal during, make described power supply unit generate described charging voltage,
When described acceptance division received described specified signal, this power control part forbade that described power supply unit generates described charging voltage.
3. charger according to claim 1 and 2 is characterized in that,
Described specified signal is to be illustrated in the signal that secondary cell that the outside should be recharged is in overvoltage condition.
4. charger comprises the 1st acceptance division that receives the 1st signal, the 2nd signal from the outside and the 2nd acceptance division and the power supply unit that applies charging voltage to the charge path with respect to the outside, and this charger is characterised in that, comprising:
Generation unit, it generates expression and self is in operating signal in service; And
Power control part, its in by this generation unit generating run signal during, make described power supply unit generate charging voltage V2, wherein, described charging voltage V2 is the corresponding voltage of the 2nd signal that receives with described the 2nd acceptance division,
When described the 1st acceptance division receive described the 1st signal or can't be by described generation unit generating run in during signal, this power control part makes described power supply unit generate the charging voltage V1 that is not more than described charging voltage V2.
5. charger according to claim 4 is characterized in that,
Described charging voltage V1 is the minimum charging voltage that described power supply unit can generate according to the 2nd signal.
6. according to claim 4 or 5 described chargers, it is characterized in that,
Described the 2nd signal is the signal that is illustrated in the number of batteries that secondary cell that the outside should be recharged possesses.
7. according to claim 1 to each described charger of 6, it is characterized in that,
The signal in service that described generation unit generates is spike train.
8. according to claim 1 to the described charger of 7 any one, it is characterized in that,
This charger possesses: control part, and it comprises microcomputer, and the charging of described battery pack is controlled,
The signal in service that described generation unit generates is the signal that the processing by described microcomputer generates.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-220340 | 2011-10-04 | ||
| JP2011220340A JP2013081313A (en) | 2011-10-04 | 2011-10-04 | Charger |
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| CN103036271A true CN103036271A (en) | 2013-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107709080A (en) * | 2015-04-27 | 2018-02-16 | 松下知识产权经营株式会社 | Cell managing device and power-supply system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350262B (en) * | 2018-04-02 | 2021-03-05 | 南京德朔实业有限公司 | Battery pack and charging combination |
| EP4166963A4 (en) | 2020-08-03 | 2023-11-29 | LG Energy Solution, Ltd. | Battery diagnosis device, battery pack, battery system, and battery diagnosis method |
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2011
- 2011-10-04 JP JP2011220340A patent/JP2013081313A/en active Pending
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107709080A (en) * | 2015-04-27 | 2018-02-16 | 松下知识产权经营株式会社 | Cell managing device and power-supply system |
| US10576827B2 (en) | 2015-04-27 | 2020-03-03 | Panasonic Intellectual Property Management Co., Ltd. | Battery management device and power supply system |
| CN107709080B (en) * | 2015-04-27 | 2020-10-27 | 松下知识产权经营株式会社 | Battery management device and power supply system |
| US11220183B2 (en) | 2015-04-27 | 2022-01-11 | Panasonic Intellectual Property Management Co., Ltd. | Battery management device and power supply system |
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| JP2013081313A (en) | 2013-05-02 |
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Application publication date: 20130410 |