CN103105586A - Inspection method for battery pack and battery pack - Google Patents
Inspection method for battery pack and battery pack Download PDFInfo
- Publication number
- CN103105586A CN103105586A CN2012104510396A CN201210451039A CN103105586A CN 103105586 A CN103105586 A CN 103105586A CN 2012104510396 A CN2012104510396 A CN 2012104510396A CN 201210451039 A CN201210451039 A CN 201210451039A CN 103105586 A CN103105586 A CN 103105586A
- Authority
- CN
- China
- Prior art keywords
- circuit
- secondary cell
- power brick
- detectable signal
- regulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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 an inspection method for a battery pack and a battery pack, wherein the inspection on a battery pack can be performed without actuating a non-recovery switch while maintaining the factory defaults of finished products. The output of the output terminal (731) of the drain electrode of an open circuit, which is connected with an input terminal (53) through a resistor (44), is switched on. In this way, one of the joint points of the serial connection of the input terminal (53) of a protection IC (5) with three secondary batteries (11, 12, 13) via the resistor (43) is forcedly reduced in electric potential. Therefore, when detection signals are output by means of an input terminal (732) while the protection IC (5) detects that the secondary battery (12) is operated in an over-voltage state, the output of the output terminal (731) of the drain electrode is switched off. As a result, the over-voltage state of the secondary battery (12) is eliminated. When the output of detection signals is stopped within a short period of time, the fuse of a non-recovery switch (30) is prevented from fusing.
Description
Technical field
The present invention relates to the inspection method of the power brick that the detectable signal of the holding circuit that non-recovery switch surveys according to the overvoltage condition that whether a plurality of secondary cells that are connected in series is in separately regulation moves and carry out the power brick of this inspection method.
Background technology
In the prior art; in the charging of the secondary cell take lithium ion battery as representative; the so-called constant current/constant voltage charging modes of main employing; that is: carry out constant-current charge with rated current; terminal voltage (below; be called cell voltage or cell voltage) reached be set after the low assigned voltage of the maximum voltage (be used for prevent overcharge protection voltage) of allowing than secondary cell, charge by constant-voltage charge.When cell voltage had surpassed maximum voltage, the life-span of battery (deteriorated degree) and charge and discharge capacitance were impaired, also might cause catching fire, and therefore, controlled in charging process and made cell voltage can not surpass maximum voltage.
In addition, be connected in series the secondary cell (cell: when the power brick of the electric battery that the unit) obtains is charged more than 2 to possessing, if the unit balance is damaged, might cause usually that cell voltage surpasses the voltage of " 1/ unit number that is connected in series " of charging voltage.Therefore, in possessing the power brick of above-mentioned this electric battery, in order to expect reliability, in most cases adopt the holding circuit that formed by hardware and prevent superpotential by the control circuit of software control with dual mode.
When holding circuit detects superpotential; the non-recovery switch that discharges and recharges in the path between secondary cell is cut off; if but for example under factory state during the actual inspection that makes holding circuit action; because non-recovery switch moves and can not use power brick; therefore in the time of can't limiting the circuit structure of the upper current limit that flows into non-recovery switch when obtaining to check, in fact can not adopt this inspection.
For example; a kind of inspection method is disclosed in patent documentation 1; in the connecting portion that inserts, the gap is set in the loop that the electric current that makes non-recovery switch motion flows through; making to holding circuit (voltage monitoring circuit), when connecting because of the superpotential detectable signal of this holding circuit after driving circuit that above-mentioned electric current flows through checks, insert scolder so that connecting portion is connected in the gap.
[patent documentation 1] TOHKEMY 2001-176561 communique
But; the disclosed inspection method of patent documentation 1 is not under factory state power brick to be completed product inspection; therefore at the substrate monomer or partly complete check under the product state after, might the fault relevant with holding circuit occur when completing product being processed into.
Summary of the invention
The present invention proposes in light of this situation, and its purpose is to provide a kind of and completes inspection method and the power brick that does not make the power brick that non-recovery switch motion just can check under the factory state of product.
the inspection method of the power brick that the present invention relates to, power brick is checked, this power brick possesses a plurality of secondary cells that are connected in series, discharging and recharging in the path and cutting off the non-recovery switch that this discharges and recharges the path between this secondary cell, with be connected the impedance circuit of regulation and be connected with each tie point of described secondary cell and survey the holding circuit that each secondary cell is in the overvoltage condition of regulation, described non-recovery switch moves according to the detectable signal of this holding circuit, the inspection method of described power brick is characterised in that, described power brick possesses: on-off circuit, it makes the tie point of an impedance circuit and holding circuit be connected/disconnect with voltage source or the current source of regulation, and testing circuit, it detects described detectable signal, in the inspection method of described power brick, connect described on-off circuit, whether judgement detects described detectable signal after connection, in the situation that detect described detectable signal, cut off described on-off circuit.
The inspection method of the power brick that the present invention relates to is characterised in that, a described impedance circuit is connected with the tie point that the positive terminal (perhaps negative terminal) of the secondary cell of potential minimum side (perhaps hot side) is connected, described on-off circuit carries out the voltage source action that is connected/cuts off with regulation, and the voltage source of this regulation provides the current potential that equates with the current potential of the negative terminal (perhaps positive terminal) of the secondary cell of described potential minimum side (perhaps hot side).
The inspection method of the power brick that the present invention relates to is characterised in that, described impedance circuit is resistance circuit.
The inspection method of the power brick that the present invention relates to is characterised in that, is connected in series other resistance circuits with described on-off circuit.
the power brick that the present invention relates to, possess: a plurality of secondary cells that are connected in series, discharging and recharging in the path and cutting off the non-recovery switch that this discharges and recharges the path between this secondary cell, with be connected the impedance circuit of regulation and be connected with each tie point of described secondary cell and survey the holding circuit that each secondary cell is in the overvoltage condition of regulation, described non-recovery switch moves according to the detectable signal of this holding circuit, described power brick is characterised in that, possess: switch element, it makes the tie point of an impedance circuit and holding circuit be connected/cut off with voltage source or the current source of regulation, detecting unit, it detects described detectable signal, judge whether described detecting unit detects the unit of described detectable signal with being connected when having connected described switch element, be judged to be when detecting described detectable signal in this unit, cut off described switch element.
In the present invention; the input terminal of the holding circuit that will be connected via a tie point among the tie point of an impedance circuit and a plurality of secondary cells that are connected in series is connected in voltage source or the current source of regulation by the on-off circuit that is connected with this input terminal.
Thus; due to the current potential of the input terminal of the holding circuit that is connected with a described impedance circuit of change forcibly, thus put among the cell voltage of secondary cell of holding circuit via each impedance circuit, one of the cell voltage that puts on holding circuit via a described impedance circuit is forced to lifting in the holding circuit side.
Afterwards; in the situation that holding circuit detects the overvoltage condition of secondary cell and has exported detectable signal; cut off on-off circuit when detectable signal being detected; from voltage source or the current source input terminal that cuts off holding circuit of regulation, the cell voltage of secondary cell directly is applied in holding circuit via each impedance circuit thus.
Therefore, the overvoltage condition of the secondary cell that holding circuit is surveyed is eliminated, thereby the output of detectable signal is stopped at short notice, has avoided the action of non-recovery switch.
In the present invention; tie point between one end of the impedance circuit that the other end is connected with the positive terminal (the perhaps negative terminal of the secondary cell of maximum potential side) of the secondary cell of potential minimum side and the input terminal of holding circuit is connected on voltage source with negative terminal (the perhaps positive terminal of the secondary cell of the maximum potential side) equal potentials of the secondary cell of described potential minimum side by on-off circuit.
At this moment; the current potential that should supply with due to the voltage source of the potential change of the input terminal that is used for making holding circuit can equate with the current potential of the negative terminal (perhaps positive terminal) of the secondary cell of potential minimum side (perhaps hot side); therefore need not to prepare special voltage source, and the structure of the on-off circuit that is connected with described voltage source becomes simple.
Have, when the current potential of the input terminal that has changed forcibly holding circuit, due to the not counter-rotating of height relation of the current potential between each input terminal, so the voltage between the input terminal of holding circuit can not surpass reverse withstand voltage (oppositely withstand voltage) again.
In the present invention, because impedance circuit is resistance circuit, therefore needn't worries to produce in induced voltage or on-off circuit when on-off circuit is connected/cuts off and flow through dash current.In addition, easily calculate each circuit interior voltage and electric current.
In the present invention; because the on-off circuit that is connected on the voltage source of regulation with input terminal with holding circuit has been connected in series other resistance circuits, the intrinsic standoff ratio of the bleeder circuit that the size of the potential change that has therefore produced on the input terminal of holding circuit when having connected on-off circuit is carried out along with 2 resistance circuits that are connected with the input terminal of holding circuit and reducing.
Thus, by suitably determining above-mentioned intrinsic standoff ratio, thereby the voltage between the input terminal of holding circuit can not surpass the withstand voltage of forward.
(invention effect)
According to the present invention, one of cell voltage that put among the cell voltage of secondary cell of holding circuit via each impedance circuit, puts on holding circuit via an impedance circuit is promoted forcibly in the holding circuit side.Afterwards; when holding circuit being detected and detect the overvoltage condition of secondary cell; the cell voltage of each secondary cell directly puts on holding circuit via each impedance circuit, and the output of detectable signal is stopped at short notice thus, thereby has avoided the action of non-recovery switch.
Therefore, in the situation that complete and under the factory state of product, non-recovery switch moved just can to check.
Description of drawings
Fig. 1 means the block diagram of the configuration example of the power brick that the present invention relates to.
Fig. 2 means the sequential chart that the time of the input and output of protection IC changes.
Fig. 3 means that enforcement is by the process flow diagram of the treatment step of the CPU of the test of the protection action of protecting IC to carry out.
Symbol description:
11,12,13 secondary cells
30 non-recovery switches
31,31 fuses
41,42,43 resistors (impedance circuit, resistance circuit)
44 resistors (the 2nd resistance circuit)
5 protection IC (holding circuit)
6AFE
7 control parts
70CPU
71ROM
72RAM
731 output ports (on-off circuit, switch element)
732 input ports (testing circuit, detecting unit)
76 Department of Communication Forces
Embodiment
Below, based on accompanying drawing detailed description the present invention of this embodiment of expression.
Fig. 1 means the block diagram of the configuration example of the power brick that the present invention relates to.In figure, the 10th, battery block, battery block 10 are to utilize the joint of not shown electric conductivity sequentially to be connected in series by this by the secondary cell 11,12,13 that lithium ion battery consists of to form.
Near battery block 10, the temperature sensor 2 of the temperature of this battery block 10 of configuration detection. Secondary cell 11,12,13 can be other the battery such as Ni-MH battery, nickel-cadmium battery.In addition, consist of battery block 10 secondary cell 11,12,13 number is not limited to 3, can be also more than 2 or 4.Have again, also can with secondary cell 11,12,13 be connected in parallel respectively 1 or a plurality of other secondary cell.
The positive terminal of secondary cell 11 is connected with anode (+) terminal 39 that exposes to not shown outside via the cutting portion 3 of cutting off secondary cell 11,12,13 charging and discharging currents.The negative terminal of secondary cell 13 is via for detection of the current sense resistor 61 of secondary cell 11,12,13 charging and discharging currents and be connected with negative electrode (-) terminal 69 that exposes to outside.
Power brick is via anode (+) terminal 39, negative electrode (-) terminal 69, the communication terminal 761,762 that is connected with aftermentioned control part 7, is installed in the electronic equipments (not shown) such as personal computer (PC), portable terminal device in mode removably.From anode (+) terminal 39 via cutting portion 3, secondary cell 11,12,13 and current sense resistor 61 to the path of negative electrode (-) terminal 69 consist of and discharge and recharge the path.
Cutting portion 3 have the N channel-type MOSFET that makes secondary cell 11,12,13 charging and discharging currents interrupted (below, be called FET) 35,36 and in series inserted the series circuit of fuse 31,31 non-recovery switch 30 between 2 terminals, this series circuit is connected to 39 of the positive terminal of secondary cell 11 and anode (+) terminals.Also can replace and discharge and recharge with FET35,36, use other the on-off element such as bipolar transistor.When charging and discharge, from AFE (analog front end) 6 described later to the FET35 that discharges and recharges use, 36 grid provides H (height) connection signal of level.Non-recovery switch 30 is 3 terminal types, inserts heating resistor 32,32 parallel circuit between the another terminal of this non-recovery switch 30 and fuse 31,31 tie point.
Cutting portion 3 also has drain the N channel-type FET33 that is connected with the another terminal of non-recovery switch 30, the OR circuit 34 that lead-out terminal is connected with the grid of this FET33.The source electrode of FET33 is connected with the negative terminal of secondary cell 13.When the lead-out terminal of OR circuit 34 is H (height) level, connect between the drain electrode of FET33 and source electrode, apply secondary cell 11,12,13 series voltage and/or from the voltage of outside via fuse 31,31 to heating resistor 32,32, thus fuse 31,31 fusing.Thus, discharging and recharging the path is reversibly cut off by non-.Be used for cutting off the parts that discharge and recharge the path and be not limited to fuse 31,31 in non-recovery switch 30.
Protection IC5 possesses respectively secondary cell 11,12,13 cell voltage and the reference voltage comparer, the timer (not shown) that compare separately.Reference voltage is 4.3V in the present embodiment, but is not limited thereto.In the situation that secondary cell 11,12,13 cell voltage be higher than 4.3V, the signal that each output of each comparer begins the timing of timer.And, when for example having passed through the turn-on delay time of 2 seconds in the time that each timer carries out timing, detect secondary cell 11,12,13 overvoltage condition, the detectable signal of overvoltage condition is provided to an input terminal of OR circuit 34.Thus, the fuse 31 of cutting portion 3,31 is fused, thus cut off secondary cell 11,12,13 discharge and recharge the path.
AFE6 has not shown comparer, in the situation that this comparer detects secondary cell 11,12,13 excess current according to the comparative result of the both end voltage of current sense resistor 61 and other reference voltages, provide L (low) cut-off signal of level to FET35,36, thereby cut off charging and discharging currents.In the situation that provide the detectable signal of overvoltage condition to AFE6 from I/O port 73 described later, AFE6 also provides cut-off signal to FET35,36.
I/O port 73 is made of a plurality of ports, and a part of output port is connected with the opposing party's of AFE6 and OR circuit 34 input terminal.I/O port 73 comprises via the output port 731 of resistor 44 and the open drain that is connected of input terminal 53 of protection IC5 with for detection of the input port 732 of the detectable signal of protecting IC5.The source electrode that is used for the FET (not shown) of driver output port 731 is connected with earthing potential.Also can replace output port 731 and input port 732, the general input/output port (not shown) of using AFE to have.Moreover in the present embodiment, the resistance value of supposing resistor 44 is zero ohm (0 Ω).
Provide separately cell voltage of secondary cell 11,12,13, the voltage of temperature sensor 2, the both end voltage of current sense resistor 61 to A/D transducer 74, A/D transducer 74 is transformed to digital voltage with these aanalogvoltages.
Department of Communication Force 76 is connected with the communication terminal 762 that is used for carrying out the communication terminal 761 of serial data (SDA) exchange and is used for receiving serial clock (SCL), with the electronic equipment of outside between carry out communicating by letter based on SMBus (System Management Bus) mode.Between the electronic equipment of Department of Communication Force 76 and outside, also can communicate by other communication mode.
Moreover CPU70 is the control program in ROM71 according to pre-save, carries out the processing such as computing and input and output.For example, CPU70 is taken into the voltage of current sense resistor 61 by the time sequence via A/D transducer 74, the charging and discharging currents that obtains after the voltage that is taken into converts is added up, thereby the capacity that accumulative total discharges and recharges secondary cell 11,12,13 and secondary cell 11,12,13 residual capacity, and generate the data of residual capacity.The data of the residual capacity that generates send to outside electronic equipment via Department of Communication Force 76.CPU70 also for example is taken into the voltage of temperature sensor 2 with 250m cycle second via A/D transducer 74 by the time sequence, and detects battery temperature based on the voltage that is taken into.
CPU70 also monitors secondary cell 11,12,13 superpotential via AFE6 and A/D transducer 74, when detecting overvoltage condition, via I/O port 73 to AFE6 output detectable signal.CPU70 is when detecting higher superpotential, via I/O port 73 another input terminal output detectable signal to OR circuit 34.
Below, illustrate in above-mentioned power brick in the situation that do not make whether normal method of the fuse 31 of non-recovery switch 30, action that protection IC5 are judged in 31 fusing.At this, secondary cell 11,12,13 cell voltage are made as V11, V12, V13, input terminal 51,52, the 53 input current potentials with respect to earthing potential are made as v51, v52, v53.
Fig. 2 means the sequential chart that the time of the input and output of protection IC5 changes.Fig. 2 A represents to input the potential difference (PD) Va (v53-0) of current potential v53 and earthing potential (0V), and Fig. 2 B represents to input the potential difference (PD) Vb (v52-v53) of current potential v52, v53, and Fig. 2 C represents to protect the state of the detectable signal of IC5.In Fig. 2 A～Fig. 2 C, the longitudinal axis represents potential difference (PD) or on/off state, and transverse axis represents the time.
In the situation that the output of the output port 731 that is connected with input terminal 53 is disconnected, as shown in Fig. 2 A, 2B, potential difference (PD) Va, Vb each secondary cell 13, cell voltage V13, V12 itself of 12 naturally.Under this state, the detectable signal of protection IC5 is for disconnecting.
Next, at moment T1, when output port 731 was output as connection, the input current potential v53 of input terminal 53 was pulled down to earthing potential (0V).At this moment, potential difference (PD) Va (v53-0) is 0V, on the other hand potential difference (PD) Vb (v52-v53) be the input current potential of input terminal 52 and earthing potential potential difference (PD), be about to the result (with reference to Fig. 2 B) after cell voltage V12, V13 addition.Thus, for the protection of IC5 survey secondary cell 11,12,13 superpotential voltage conditions is met.
Afterwards; passing through above-mentioned turn-on delay time (for example 2 seconds) moment T2 afterwards; the detectable signal of protection IC5 is in the situation of connection, is changed to connection (1) at the detectable signal that should be taken into from the input port 732 of I/O port 73 from disconnecting (0).When former state is placed this state, thus fuse 31,31 fusing of connecting non-recovery switch 30 due to FET33, and therefore in the present embodiment, at moment T3, the output of output port 731 is back to disconnection.Constantly the time of T2 to T3 is that CPU70 detects the time that the output that makes output port 731 after the connection of the detectable signal that is taken into from input port 732 is back to disconnection, is in 100ms in common processing.
After moment T3, because potential difference (PD) Va, Vb return to state before T1 constantly, therefore protect IC5 to be used to survey secondary cell 11,12,13 superpotential voltage conditions is not being met.Afterwards, the moment T4 after the turn-off delay time of having passed through protection IC5, the detectable signal of protection IC5 becomes disconnection.Turn-off delay time herein is for example 16～20ms.
According to above situation, the deration of signal (detectable signal is in the time of connection) of the detectable signal that protection IC5 can be exported is suppressed at before and after 20ms.On the other hand, in the Thermal Cutoffs of the resistor internally-arranged type that is widely used as non-recovery switch 30, built-in resistor heats up and make the time that needs second unit till Thermal Cutoffs fusing, therefore during the output detectable signal, non-recovery switch 30 can not move.Even if be also same in the situation that use other non-recovery switches.
Below, utilize process flow diagram to represent the action of the control part 7 of above-mentioned power brick.Processing shown below is to be carried out according to the control program of pre-save in ROM71 by CPU70.
Fig. 3 means that enforcement is by the process flow diagram of the treatment step of the CPU70 of the test of the protection action of protecting IC5 to carry out.The processing of Fig. 3 for example is activated when having indicated by communication the test of protecting IC5 from external electronic device.
In the situation that the processing of Fig. 3 is activated, CPU70 makes the output of output port 731 connect (1), will protect thus the input terminal 53 of IC5 to be connected in earthing potential (S11).As mentioned above, output port 731 is open drain drives, therefore when output disconnects (0), cuts off input terminal 53 from earthing potential.That is to say, output port 731 is being undertaken the effect that makes the switch that input terminal 53 is connected with earthing potential/cuts off.
Afterwards, the detectable signal (on/off state) that CPU70 is taken into protection IC5 via input port 732 (S12) judges whether the detectable signal that is taken into is connection (S13).Not (S13: no) when connecting at detectable signal, make to process to be back to step S12, proceed step S12,13 processing until till connecting.
When detectable signal becomes connection (S13: be), CPU70 makes the output of output port 731 disconnect (0), cuts off thus the input terminal 53 (S14) of protection IC5 from earthing potential.Next, CPU70 generates the message data of completing inspection, exports external electronic device (S15) to afterwards via Department of Communication Force 76, finishes the processing of Fig. 3.
According to above present embodiment; make via resistor (impedance circuit) input terminal of a protection IC who is connected among the tie point with 3 secondary cells that are connected in series; the output of the output port by making the open drain that is connected with this input terminal is connected, thereby is connected with earthing potential.
Thus; the current potential of the input terminal of the protection IC that is connected with an end of described resistor (impedance circuit) is reduced forcibly; therefore; impose on via each resistor (impedance circuit) among the cell voltage of secondary cell of protection IC, impose on one of cell voltage of protection IC via described resistor (impedance circuit), be forced to improve in protection IC side.
Then; in the situation that protection IC detects the overvoltage condition of secondary cell and has exported detectable signal; when detecting detectable signal via input port; the output of the output port of open drain is disconnected; make the input terminal that cuts off protection IC from earthing potential, the cell voltage of secondary cell directly is applied to protection IC via each resistor (impedance circuit) thus.
Therefore, the overvoltage condition of the secondary cell that protection IC surveys is removed, thereby the output of detectable signal stopped within the short time, had avoided the fusing of the fuse of non-recovery switch.
Therefore, in the situation that complete under the factory state of product non-recovery switch motion can be checked.
In addition; the output of the output port by making open drain is connected; thereby the tie point between the input terminal of an end of the impedance circuit (resistor) that the other end is connected with the positive terminal of the secondary cell of potential minimum side and protection IC is connected in the negative terminal that is in secondary cell with on equipotential earthing potential.
At this moment; because the current potential of the voltage source of the potential change of the input terminal that is used for making protection IC equates to get final product with the current potential of the negative terminal of the secondary cell of potential minimum side; therefore do not need to prepare special voltage source, and can make the structure of the on-off circuit that is connected in described voltage source form this simple structure of open drain.
Have again, when the current potential of the input terminal of protecting IC is reduced forcibly, due to the height relation counter-rotating of the current potential between each input terminal, therefore can make the voltage between the input terminal of protecting IC can not surpass reverse withstand voltage (oppositely withstand voltage).
Have again, because impedance circuit is resistance circuit, therefore needn't worry that induced voltage occurs or flow through dash current (surge current) in output port when the output of the output port of open drain is switched on/disconnects, and easily calculate voltage and electric current in each circuit.
Moreover; in the present embodiment; the input terminal 53 that makes protection IC5 is by output port 731 and be connected with earthing potential, but also can utilize other on-off element and be connected on the voltage source that is different from earthing potential, can also be connected with current source and makes the potential change of input terminal 53.
In addition, in the present embodiment, will protect the current potential of the input terminal 53 of IC5 to be pulled down to earthing potential, but be not limited thereto, for example, also the current potential of input terminal 52 can be increased to the current potential that equates with the positive terminal of secondary cell 11.Particularly, as long as prepare the P channel-type FET that drain electrode is connected with input terminal 52, source electrode is connected with the positive terminal of secondary cell 11, described P channel-type FET is connected get final product.
Have again; in the present embodiment; after the I/O port 73 of the control part 7 that utilization is made of microcomputer makes the potential change of input terminal 53, detect the detectable signal of protection IC5, carried out these processing but also can utilize by the circuit that consists of based on hardware such as hard wired logics.
(variation)
In the power brick that above-mentioned embodiment relates to, will be made as zero ohm between the input terminal 53 of protection IC5 and the resistance value of the resistor 44 between output port 731, but in the power brick that this variation relates to, resistor 44 has limited resistance value.Different value during the power brick that input current potential v53 becomes from embodiment relates to of the input terminal 53 when thus, the output of output port 731 being connected.Below, illustrate that potential difference (PD) Va, the Vb shown in Fig. 2 A, the 2B of embodiment becomes why to be worth in this variation.Below, resistor 43,44 resistance value are made as R43, R44.
In the situation that the output of the output port 731 that is connected with input terminal 53 via resistor 44 is disconnected, the power brick that relates to embodiment similarly, potential difference (PD) Va, Vb each secondary cell 13, cell voltage V13, V12 itself of 12 naturally.Under this state, the detectable signal of protection IC5 becomes disconnection.
Next, at moment T1, in the situation that the output of output port 731 becomes connection, the input current potential v53 of input terminal 53 and potential difference (PD) Va become the value by following formula (1) expression.
Va＝v53＝(R44/(R43+R44))×V13 …(1)
The potential difference (PD) Vb of this moment becomes by the value shown in following formula (2).
Vb＝V12+V13-v53
＝V12+(R43/(R43+R44))×V13 …(2)
That is to say, in this variation, during moment T1 to T3, the value of the Vb shown in Fig. 2 B of the embodiment value shown in formula (1) that descended.At this, the voltage that the voltage that descends obtains along with being carried out dividing potential drop by the cell voltage V13 of resistor 43,44 pairs of secondary cells 13 and changing.
That is to say, by the intrinsic standoff ratio shown in the right of suitable setting formula (2), can limit input terminal 52, the higher limit of potential difference (PD) of 53.
Moreover other structures of the power brick that relates to due to variation are identical with the structure of the power brick that embodiment relates to, and therefore, give identical symbol and description is omitted for same part.
As more than; according to this variation; the output port that is connected in the open drain of earthing potential due to the input terminal that will protect IC is connected with resistor in series; therefore when the output of output port is connected, the intrinsic standoff ratio of the bleeder circuit that 2 resistors that the size of the potential change that the input terminal of protection IC produces is connected along with the input terminal with protection IC carry out and reducing.
Therefore, by suitably determining above-mentioned intrinsic standoff ratio, can make the voltage between the input terminal of protecting IC be no more than the withstand voltage of forward.
This disclosed embodiment is all illustration, and is not restrictive content.Scope of the present invention is not foregoing, and is represented by claim, comprises the whole changes in the meaning identical with claim and scope.
Claims (5)
1. the inspection method of a power brick, power brick is checked, this power brick possesses a plurality of secondary cells that are connected in series, discharging and recharging in the path and cutting off the non-recovery switch that this discharges and recharges the path between this secondary cell, with be connected the impedance circuit of regulation and be connected with each tie point of described secondary cell and survey the holding circuit that each secondary cell is in the overvoltage condition of regulation, described non-recovery switch moves according to the detectable signal of this holding circuit, the inspection method of described power brick is characterised in that
Described power brick possesses: on-off circuit, and it makes the tie point of an impedance circuit and holding circuit be connected/disconnect with voltage source or the current source of regulation; With
Testing circuit, it detects described detectable signal,
In the inspection method of described power brick,
Connect described on-off circuit,
Whether judgement detects described detectable signal after connection,
In the situation that detect described detectable signal, cut off described on-off circuit.
2. the inspection method of power brick according to claim 1, is characterized in that,
The tie point that a described impedance circuit is connected with the positive terminal of the secondary cell of potential minimum side is connected or the tie point that is connected with the negative terminal of the secondary cell of maximum potential side is connected,
Described on-off circuit carries out the voltage source action that is connected/cuts off with regulation, and the voltage source of this regulation provides the current potential identical with the current potential of the negative terminal of the secondary cell of described potential minimum side or the current potential identical with the current potential of the positive terminal of the secondary cell of described maximum potential side is provided.
3. the inspection method of power brick according to claim 1 and 2, is characterized in that,
Described impedance circuit is resistance circuit.
4. the inspection method of power brick according to claim 3, is characterized in that,
Be connected in series other resistance circuit with described on-off circuit.
5. power brick; it possesses: a plurality of secondary cells that are connected in series, discharging and recharging in the path and cutting off this non-recovery switch that discharges and recharges the path and be connected the impedance circuit of regulation and be connected with each tie point of described secondary cell and survey the holding circuit that each secondary cell is in the overvoltage condition of regulation between this secondary cell; described non-recovery switch moves according to the detectable signal of this holding circuit; described power brick is characterised in that to possess:
Switch element, it makes the tie point of an impedance circuit and holding circuit be connected/cut off with voltage source or the current source of regulation;
Detecting unit, it detects described detectable signal; With
Judge when having connected described switch element whether described detecting unit detects the unit of described detectable signal,
Detect described detectable signal in the situation that this unit is judged to be, cut off described switch element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-249001 | 2011-11-14 | ||
| JP2011249001A JP2013106442A (en) | 2011-11-14 | 2011-11-14 | Battery pack inspection method and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103105586A true CN103105586A (en) | 2013-05-15 |
Family
ID=48313587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104510396A Pending CN103105586A (en) | 2011-11-14 | 2012-11-12 | Inspection method for battery pack and battery pack |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2013106442A (en) |
| CN (1) | CN103105586A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017148123A1 (en) * | 2016-02-29 | 2017-09-08 | 比亚迪股份有限公司 | Battery protecting device and power assembly |
| CN110140274A (en) * | 2016-12-07 | 2019-08-16 | 株式会社自动网络技术研究所 | The protection circuit and battery monitoring apparatus of battery monitoring apparatus |
| CN110741268A (en) * | 2018-02-01 | 2020-01-31 | 株式会社Lg化学 | Method for determining power limit of battery and battery management system |
| CN111971564A (en) * | 2018-04-26 | 2020-11-20 | 株式会社自动网络技术研究所 | Voltage detection circuit for vehicle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7247020B2 (en) * | 2019-05-27 | 2023-03-28 | 株式会社東芝 | Storage battery system, method and program |
-
2011
- 2011-11-14 JP JP2011249001A patent/JP2013106442A/en active Pending
-
2012
- 2012-11-12 CN CN2012104510396A patent/CN103105586A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017148123A1 (en) * | 2016-02-29 | 2017-09-08 | 比亚迪股份有限公司 | Battery protecting device and power assembly |
| CN110140274A (en) * | 2016-12-07 | 2019-08-16 | 株式会社自动网络技术研究所 | The protection circuit and battery monitoring apparatus of battery monitoring apparatus |
| CN110741268A (en) * | 2018-02-01 | 2020-01-31 | 株式会社Lg化学 | Method for determining power limit of battery and battery management system |
| CN110741268B (en) * | 2018-02-01 | 2021-10-29 | 株式会社Lg化学 | Method for determining power limit of battery and battery management system |
| US11366169B2 (en) | 2018-02-01 | 2022-06-21 | Lg Energy Solution, Ltd. | Method for determining power limit of battery, and battery management system |
| CN111971564A (en) * | 2018-04-26 | 2020-11-20 | 株式会社自动网络技术研究所 | Voltage detection circuit for vehicle |
| CN111971564B (en) * | 2018-04-26 | 2023-06-16 | 株式会社自动网络技术研究所 | Voltage detection circuit for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013106442A (en) | 2013-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101421902B (en) | Charging method and battery pack | |
| CN201466159U (en) | Battery charger, battery system and electric tool system | |
| US8487581B2 (en) | Battery pack burn-in test system and method | |
| CN1790857B (en) | Protective circuit of battery pack and method for determining sensing line breaking | |
| CN102110862B (en) | Battery pack and line open detecting method thereof | |
| EP2087572B1 (en) | Battery pack charging system and method | |
| CN101459267B (en) | Battery pack | |
| CN103091636A (en) | Abnormity determining method for battery pack and battery pack thereof | |
| CN101765941A (en) | Battery internal short-circuit detecting device and method, battery pack, and electronic device system | |
| CN105051552A (en) | Failure detection apparatus for voltage sensor | |
| CN104620117A (en) | Power supply apparatus | |
| CN102313873B (en) | Battery number detecting circuit and method and monitoring system | |
| CN102751749A (en) | Charge stop point detecting method, charge stop point detecting device, and battery pack | |
| JP6072327B2 (en) | Storage battery device, storage battery device control method and control program | |
| CN103105586A (en) | Inspection method for battery pack and battery pack | |
| CN104348215A (en) | Charger, battery module, and systems and methods for identifying and monitoring a battery charger | |
| CN202153654U (en) | System for detecting open circuit cell joint in battery | |
| CN106936173A (en) | Method for charging battery pack and equipment | |
| CN102621494A (en) | Overvoltage detection device, protective device and battery pack | |
| CN106712202A (en) | Aircraft power supply management system and aircraft | |
| CN104242374A (en) | Charge/discharge control circuit and battery device | |
| KR20150107032A (en) | Battery pack | |
| CN104659873A (en) | Protection circuit for charging battery, battery protection module, battery pack, and processing method | |
| CN106299180B (en) | The combination of electric tool and battery pack | |
| US20200006960A1 (en) | Charging device and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130515 |