CN202586386U - An inspection and maintenance and equalizing maintenance device of motive power battery pack - Google Patents
An inspection and maintenance and equalizing maintenance device of motive power battery pack Download PDFInfo
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- CN202586386U CN202586386U CN2012200227882U CN201220022788U CN202586386U CN 202586386 U CN202586386 U CN 202586386U CN 2012200227882 U CN2012200227882 U CN 2012200227882U CN 201220022788 U CN201220022788 U CN 201220022788U CN 202586386 U CN202586386 U CN 202586386U
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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
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Abstract
The utility model discloses an inspection and maintenance and equalizing maintenance device of motive power battery pack. A distribution control system of upper and lower computers can be formed by a plurality of inspection and equalizing maintenance devices of motive power battery pack. Each device comprises a switching and charging circuit, a plurality of single battery equalizedly-charging circuits, a plurality of single battery voltage sampling circuits, and a single chip machine control system. The switching and charging circuit, which is connected with the motive power battery pack and the single chip machine control system, comprises an external charger and an internal charging source. Each single battery equalizely-charging circuit is connected with a single battery of the motive power battery pack and the single chip machine control system. Each single battery voltage sampling circuit is connected with a single battery of the motive power battery pack and the single chip machine control system. The inspection and maintenance and equalizing maintenance device of motive power battery pack is capable of inspecting and maintaining the motive power battery pack regularly, and performing voltage equalizing maintenance when the voltages of single batteries of the battery pack are not equalized, so as to substantially enhance working performance of the motive power battery pack and prolong service life of the entire motive power battery pack.
Description
Technical field
The utility model relates to the battery technology field, and the detection that particularly relates to a kind of power battery pack is safeguarded and balanced maintenance facility.
Background technology
At present, along with the continual renovation and the development of lithium-ion electric pool technology, its light weight, Gao Rong, long-life advantage obtain consumer's favor gradually.Wherein, the application of lithium power battery pack on electric automobile, battery-operated motor cycle and electric bicycle and other power electrical appliances develops rapidly.
The battery of lithium battery and other types is compared, and it is balanced obvious especially with the maintaining problem, has caused the attention of vast battery and electric motor car manufacturer at present.
For power battery pack, it is cascaded through a plurality of cells, thereby realizes reaching the purpose of required voltage.A power battery pack; Its through after a while discharge and recharge use after; Will occur voltage for example between each cell has height that problems such as the unbalanced and capacity at the end is unbalanced are arranged, even can cause cell to be damaged, and these problems make that the whole power battery group can not continue to use; Perhaps reduced power performance, this is the problem that battery production producer studies and needs to solve always.For example; The power battery pack of an electric automobile, be full of electricity at first after, 40 kilometers of drivable of electric automobile; But through after a while discharge and recharge use after; Because problem has appearred in cell, after this power battery pack is full of electricity so, electric automobile possible can only go 20 kilometers even distance still less.
For this reason, for the lithium-ion-power cell group, if the user went wrong when using, the battery producer that has makes a promise have problem just to change, and this has increased production and operation cost greatly, brings serious economy loss for battery producer.Equally, also there is identical problem in other types power battery pack such as ni-mh, NI-G and plumbic acid, and particularly in a single day some battery pack does not have baffle or baffle to lose efficacy, have a cell to damage, and is easy to make other monomers of whole Battery pack to overcharge damage.
Therefore; Press for a kind of technology of developing at present; It can regularly detect maintenance to the power battery pack of lithium-ion-power cell group and other types, carries out the electric voltage equalization maintenance when voltage of cell is unbalanced in battery pack, and when cell generation problem; In time detect and point out users such as battery producer in time to keep in repair; Thereby improve the service behaviour of power battery pack greatly, effectively prolong the useful life of whole power battery group, strengthen battery pack user's product use experience.
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The utility model content
In view of this, the purpose of the utility model provides a kind of detection maintenance and balanced maintenance facility of power battery pack, and it can regularly detect maintenance to the power battery pack of lithium-ion-power cell group and other types; Carry out the electric voltage equalization maintenance when voltage of cell is unbalanced in battery pack; Thereby improve the service behaviour of power battery pack greatly, effectively prolong the useful life of whole power battery group, strengthen battery pack user's product use experience; Help enlarging the production application prospect of battery producer; Promote the application of electric motor car industry, can form the scale of industry, be of great practical significance.
For this reason; The utility model provides a kind of detection of power battery pack to safeguard and balanced maintenance facility; Said power battery pack includes a plurality of cells that are cascaded; This equipment includes a switching charging circuit 100, a plurality of cell equalization charging circuit 200, a plurality of monomer battery voltage sample circuit 300 and a single-chip computer control system 400, wherein:
Switch charging circuit 100, be connected with single-chip computer control system 400 with said power battery pack respectively, said switching charging circuit includes an external charger and a charge inside power supply;
Each cell equalization charging circuit 200, respectively with power battery pack in a cell be connected with single-chip computer control system 400;
Each monomer battery voltage sample circuit 300, respectively with power battery pack in a cell be connected with single-chip computer control system 400.
The communication interface that single-chip computer control system includes the photoelectricity isolation is connected with master controller.
Wherein, Charging transfer relay K2 and a monomer charging transfer relay K1 inside and outside said switching charging circuit 100 also includes one; Said charge inside power supply is connected with the normally closed some A of said inside and outside charging transfer relay K2; Normal battle of the B of said external charger and said inside and outside charging transfer relay K2 is connected; Said inside and outside charging transfer relay K2 is connected with monomer charging transfer relay K1, and charge normal battle of the C of transfer relay K1 of said monomer is connected with power battery pack BT;
Said single-chip computer control system 400 is connected with monomer charging transfer relay K1 with said inside and outside charging transfer relay K2 respectively.
Wherein, Said cell equalization charging circuit 200; Include a DC constant-current and constant-voltage control circuit 201, a photoelectricity coupling resistance Ur is cell charging voltage regulating circuit 202 and a cell charging current sample circuit 203 of master control, said DC constant-current and constant-voltage control circuit 201 is connected with cell charging current sample circuit 203 with said UR cell charging voltage regulating circuit 202 respectively.
Wherein, Said DC constant-current and constant-voltage control circuit includes a cell charge power supply Vin; Said cell charge power supply Vin connects the resistance R 5 in stitch 3, capacitor C 1 and the said cell charging current sample circuit 203 of current sampling resistor Rw, DC constant current constant voltage control chip U1 respectively; Current sampling resistor Rw connects the stitch 1,5,6 of said DC constant current constant voltage control chip U1 and the resistance R 4 in the said cell charging current sample circuit 203 respectively, and the other end of said capacitor C 1 connects the stitch 7, capacitor C 2, the positive pole of diode D, the negative pole of photoelectricity coupling resistance Ur input, capacitor C and cell in the UR cell charging voltage regulating circuit 202 of said DC constant current constant voltage control chip U1 respectively;
Said capacitor C 2 connects the stitch 8 of DC constant current constant voltage control chip U1; The stitch 2 of said DC constant current constant voltage control chip U1 connects the positive pole of inductance L, relay K 3n and cell successively; The stitch 4 difference connecting resistance R1 of said DC constant current constant voltage control chip U1, the node Z of the photoelectricity coupling resistance Ur in the UR cell charging voltage regulating circuit 202, the other end of said resistance R 1 connects node, the capacitor C between inductance L and the relay K 3n respectively.
Wherein, said cell charging current sample circuit 203 includes operational amplifier U4, and the positive input of said operational amplifier U4 is connecting resistance R5 and resistance R 6 respectively, said resistance R 6 ground connection;
The reverse input end of said operational amplifier U4 is connecting resistance R4 and resistance R 3 respectively, said resistance R 3 connecting resistance R7, and said resistance R 7 connects sample rate current output Iout and capacitor C 3 respectively, and said capacitor C 3 is joined with resistance R 6;
The output of said operational amplifier U4 is connected with node between said resistance R 3 and the resistance R 7, and the power input Vdd of said operational amplifier U4 is connected with the DC power supply of+12V, and the earth terminal Vss of said operational amplifier U4 connects-12V.
Wherein, Said UR cell charging voltage regulating circuit 202 includes a photoelectricity coupling diode that is coupled with photoelectricity coupling resistance Ur; The positive pole of said photoelectricity coupling diode connects the DC power supply of 5V respectively, the collector electrode of a triode Q2 of the said photoelectricity coupling diode other end;
The emitter connecting resistance R9 of said triode Q2 and the reverse input end of an operational amplifier U3, said resistance R 9 ground connection;
The base stage of said triode Q2 connects the output of operational amplifier U3, and the power input Vdd of said operational amplifier U3 is connected the earth terminal Vss ground connection of said operational amplifier U3 with the DC power supply of+12V;
The positive input difference connecting resistance R8 of said operational amplifier U3 and the adjusting control end DV of a single-chip microcomputer DA output voltage.
Wherein, said monomer battery voltage sample circuit 300 includes an operational amplifier U5, and the positive input of said operational amplifier U5 is connecting resistance R62 and R64 respectively, and said resistance R 62 is connected with the positive pole of cell B, said resistance R 64 ground connection;
The reverse input end of said operational amplifier U5 is connecting resistance R63 and resistance R 61 respectively; Said resistance R 63 is connected with the negative pole of cell; Said resistance R 61 is connected with the output of operational amplifier U5, and the output of said operational amplifier U5 is connected with sampled voltage output end vo ut;
The power input Vdd of said operational amplifier U5 is connected with the DC power supply of+12V, and the other end Vss of said operational amplifier U5 is connected with the DC power supply of-12V.
Wherein, Include casing 1; The front of said casing 11 is provided with two battery pack anchor clamps 12; The front of said casing 11 also is provided with a plurality of cell charged state indicator light 13, battery pack charging status indicator light 14, a plurality of cell charging inlet 15 and a plurality of monomer battery voltage sampling interface 16, and the back side of said casing 11 also is provided with a photoelectricity isolation computer communication interface 17.
Wherein, said detection maintenance and balanced maintenance facility and master controller are formed together and are used for distribution control system equipment a plurality of power battery pack, that comprise upper and lower computer.
Technical scheme by above the utility model provides is visible; Compared with prior art, the utility model provides a kind of detection of power battery pack to safeguard and balanced maintenance facility that it can regularly detect maintenance to the power battery pack of lithium-ion-power cell group and other types; Carry out the electric voltage equalization maintenance when voltage of cell is unbalanced in battery pack; Thereby improve the service behaviour of power battery pack greatly, effectively prolong the useful life of whole power battery group, strengthen battery pack user's product use experience; Help enlarging the production application prospect of battery producer; Promote the application of electric motor car industry, can form the scale of industry, be of great practical significance.
Description of drawings
The detection of a kind of power battery pack that Fig. 1 provides for the utility model is safeguarded and the block diagram of the circuit structure of balanced maintenance facility;
Fig. 2 safeguards and the circuit structure sketch of balanced maintenance facility when having a cell equalization charging circuit and a monomer battery voltage sample circuit for the detection of a kind of power battery pack that the utility model provides;
The detection of a kind of power battery pack that Fig. 3 provides for the utility model safeguard and balanced maintenance facility in the circuit block diagram of a cell equalization charging circuit;
The detection of a kind of power battery pack that Fig. 4 provides for the utility model safeguard and balanced maintenance facility in the physical circuit line map of a cell equalization charging circuit;
The detection of a kind of power battery pack that Fig. 5 provides for the utility model safeguard and balanced maintenance facility in the circuit diagram of a monomer battery voltage sample circuit;
Fig. 6 is for passing through utilization the utility model, and the detection of formed a plurality of battery pack is safeguarded and the balanced structured flowchart that maintains general control system;
Fig. 7 has a kind of surface structure sketch map for the detection maintenance and the balanced maintenance facility of a kind of power battery pack that the utility model provides.
Embodiment
In order to make those skilled in the art person understand the utility model scheme better, the utility model is done further to specify below in conjunction with accompanying drawing and execution mode.
The detection of a kind of power battery pack that Fig. 1 provides for the utility model is safeguarded and the block diagram of the circuit structure of balanced maintenance facility.
Referring to Fig. 1; The utility model provides a kind of detection of power battery pack to safeguard and balanced maintenance facility; Said power battery pack includes a plurality of cells that are cascaded; This equipment includes a switching charging circuit 100, a plurality of cell equalization charging circuit 200, a plurality of monomer battery voltage sample circuit 300 and a single-chip computer control system 400, wherein:
Switch charging circuit 100; Be connected with single-chip computer control system 400 with said power battery pack respectively; Said switching charging circuit 100 includes an external charger (said external charger is connected with external power source) and a charge inside power supply; Be used for receiving in real time the charging instruction that said single-chip computer control system 400 sends; When this charging instruction is external charger charging instruction or the instruction of charge inside power source charges; Accordingly said external charger or charge inside power supply are connected and charge (serial connection charge) with power battery pack respectively, promptly are specially: when this charging instruction is the external charger charging instruction, in real time with external charger and power battery pack conductive communication mutually; Being connected between breaking inner charge power supply and the power battery pack, thus by external charger to whole power battery group charge (being external charging); And when this charging instruction is instructed for the charge inside power source charges; In real time with charge inside power supply and power battery pack conductive communication mutually; Being connected between disconnecting external charger and the power battery pack, thus by the charge inside power supply to whole power battery group charge (being charge inside); In addition, when this charging instruction is the whole charge cutoff instruction of battery pack, cut off in real time external charger or charge inside power supply both with power battery pack between be connected;
Each cell equalization charging circuit 200; Respectively with power battery pack in a cell be connected with single-chip computer control system 400; Be used for receiving the charging instruction that said single-chip computer control system 400 sends in real time, when this charging instruction is cell equalizing charge enabled instruction, in real time a cell that is connected is carried out equalizing charge and (promptly carry out the cell constant current charge earlier; Carry out constant voltage charge then); Otherwise, when this charging instruction is cell equalizing charge halt instruction, stop in real time a cell that is connected is charged;
Each monomer battery voltage sample circuit 300, respectively with power battery pack in a cell be connected with single-chip computer control system 400, be used for gathering in real time the voltage of the cell that is connected, export to single-chip computer control system 400 then;
Single-chip computer control system 400; Be connected with a plurality of monomer battery voltage sample circuits 300 with switching charging circuit 100, said a plurality of cell equalization charging circuits 200 respectively; Being used for being provided with in real time the instruction of external charger charging instruction and charge inside power source charges (need to prove; These two instruction users not only can import setting through the button that the present device surface is provided with; Can also be through the program that is provided with in advance in the said single-chip computer control system 400; Import setting like the balanced maintenance of automatic detection working procedure); Be transmitted to then and switch charging circuit 100, and the charging voltage upper limit that cell is set in advance, and receive the voltage of a plurality of cells of said a plurality of monomer battery voltage sample circuit 300 sampling outputs in real time; When external charger or charge inside power supply charge to the whole power battery group; If the voltage of some or a plurality of cells reaches on the said cell charging voltage in limited time, at first send the whole charge cutoff instruction of battery pack to switching charging circuit 100, thereby control said switching charging circuit 100 cut off in real time external charger or charge inside power supply both with power battery pack between be connected; Then said a plurality of cell equalization charging circuits 200 are sent a cell equalizing charge enabled instruction respectively; Control said cell equalization charging circuit 200 and in real time each cell that is connected is carried out equalizing charge, till the voltage of this cell all reaches the said cell charging voltage upper limit, (promptly reach on the said cell charging voltage in limited time, stop in real time it is continued charging) at the voltage of certain cell.
Need to prove; On concrete the realization; The utility model can be through being provided with an external charging button and a charge inside power source charges button on the device housings surface; Come to instruct to single-chip computer control system 400 input external charger charging instruction charge inside power source charges respectively, realize that control is to be come power battery pack is charged by external power source or charge inside power supply.
On concrete the realization, said external charger can be that the external power source of 220V is connected with voltage, can also can be the external power source of 240V and other voltage values as required certainly.Said charge inside power supply can be other battery pack that are provided with in the utility model equipment, can also be generating equipments such as generator.
On concrete the realization, said single-chip computer control system 400 can be for including the single-chip microcomputer of 24 modulus AD conversions of a slice band at least.
Need to prove; The detection of a kind of power battery pack that provides for the utility model is safeguarded and balanced maintenance facility; A plurality of this equipment can be set; Thereby can detect maintenance and balanced maintenance to a plurality of power battery pack, thereby satisfy the user demand of high voltage electric automobile, the important regular maintenance demand that is applicable to the high voltage electric automobile.
In the utility model; Power battery pack detecting that can be provided by a plurality of the utility model and balanced maintenance facility and master controller are together; Composition is realized the daily detection of a plurality of power battery pack is safeguarded and balanced maintenance to the distribution control system of a plurality of power battery pack upper and lower computers.
Fig. 2 safeguards and the circuit structure sketch of balanced maintenance facility when having a cell equalization charging circuit and a monomer battery voltage sample circuit for the detection of a kind of power battery pack that the utility model provides.
Referring to shown in Figure 2; On concrete the realization; Charging transfer relay K2, monomer charging transfer relay K1, an external charger (said external charger is connected with external power source) and a charge inside power supply inside and outside said switching charging circuit 100 specifically includes one; Wherein, Said charge inside power supply is connected with the normally closed some A of said inside and outside charging transfer relay K2, and normal battle of the B of said external charger and said inside and outside charging transfer relay K2 is connected, and said inside and outside charging transfer relay K2 and the monomer transfer relay K1 that charges is connected; Normal battle of the C of said monomer charging transfer relay K1 is connected with power battery pack BT, the charge normally closed some C vacant (not connecting miscellaneous part) of transfer relay K1 of said monomer.
In the utility model; Referring to Fig. 2; In order to let said single-chip computer control system 400 can control the operating state of said inside and outside charging transfer relay K2 and monomer charging transfer relay K1; Said single-chip computer control system 400 is provided with relay J K interface, and this JK interface is connected with monomer charging transfer relay K1 with said inside and outside charging transfer relay K2 respectively, is used to control energising and the power failure state of K2 and K1.
Need to prove that for a relay, it is a closure of controlling normally opened contact through energising, controls the disconnection of normally opened contact and the closure of normally-closed contact through dead electricity.
In the utility model, for K2, JK interface output voltage makes its energising to K2, the closed connection of normal battle of B of K2 so, if the JK interface not output voltage give K2, K2 dead electricity so, normally closed closed connection of A; For K1, JK interface output voltage makes its energising to K1, the closed connection of normal battle of C of K1 so, if the JK interface not output voltage give K1, K1 dead electricity so, normally closed closed connection of D.
Referring to Fig. 2; For switching charging circuit 100, closed connection of B and K1 are often made war if K2 is often made war, and C is closed to be connected, and power battery pack is connected with external charger so; Formed the external impetus charge circuit to battery pack this moment, thereby external power source can carry out external charging to battery pack.In order to realize the purpose of external charging; Said single-chip computer control system 400 is exported to the external charger charging instruction of switching charging circuit 100 and is embodied as: energising and the power failure state of controlling K1 and K2 in the said switching charging circuit 100 through the output voltage of regulating the JK interface; Often make war that B is closed to be connected and the K1 closed effect of connecting of C of often making war thereby finally reach control K2, thereby realize battery pack being carried out external charging by external power source.
If C is closed to be connected and normally closed some A closure of K2 connected and K1 is often made war, power battery pack is connected with the charge inside power supply so, and formation this moment is to the charge inside loop of battery pack, and said charge inside power supply can carry out charge inside to battery pack.In order to realize the purpose of charge inside; Said single-chip computer control system 400 is exported to the charge inside power source charges instruction of switching charging circuit 100 and is embodied as: energising and the power failure state of controlling K1 and K2 in the said switching charging circuit 100 through the output voltage of regulating the JK interface; Normally closed some A of control K2 is closed to be connected and the K1 closed effect of connecting of C of often making war thereby finally reach, and final the realization carried out charge inside by the charge inside power supply to power battery pack.
In addition, as stated, if the JK interface not output voltage give K1, K1 dead electricity so, normally closed closed connection of D, at this moment external charger and charge inside power supply break off with power battery pack between be connected.In order to realize cutting off this purpose that is connected between external charger and charge inside power supply and the power battery pack; Said single-chip computer control system 400 is exported to the whole charge cutoff instruction of the battery pack of switching charging circuit 100 and is embodied as: control energising and the power failure state of K1 in the said switching charging circuit 100 through the output voltage of JK interface, thereby finally reach the normally closed point 2 closed effects of connecting of control K1.
For said single-chip computer control system 400 can gathered and control the charging voltage and the charging current data of inner charge power supply; Said single-chip computer control system 400 is provided with VK and IK interface, is used for controlling respectively the charging constant voltage and charging constant current of charge inside power supply.In addition, in order to obtain the operating voltage of external charger or charge inside power supply, also be provided with the VC interface on the said single-chip computer control system 400.
In addition; Referring to Fig. 2, on concrete the realization, also be provided with VB interface and charged state indicator light on the said single-chip computer control system 400; Wherein, Said VB interface is used to connect the two ends of power battery pack, thus the voltage at the battery pack two ends that gain impetus, and said charged state indicator light is used to indicate the operating state of the utility model system.
The detection of a kind of power battery pack that Fig. 3 provides for the utility model safeguard with balanced maintenance facility in the circuit block diagram of a cell equalization charging circuit, the physical circuit line map of a cell equalization charging circuit in the detection maintenance of a kind of power battery pack that Fig. 4 provides for the utility model and the balanced maintenance facility.
Referring to Fig. 3, Fig. 4; On concrete the realization; The cell equalization charging circuit 200 that provides for the utility model; Include a DC (direct current) constant-current and constant-voltage control circuit 201, a photoelectricity coupling resistance UR cell charging voltage regulating circuit 202 and a cell charging current sample circuit 203; Said DC (direct current) constant-current and constant-voltage control circuit 201 is connected with cell charging current sample circuit 203 with said photoelectricity coupling resistance Ur cell charging voltage regulating circuit 202 respectively, wherein:
Said DC (direct current) constant-current and constant-voltage control circuit includes a cell charge power supply Vin; Said cell charge power supply Vin connects the resistance R 5 in stitch 3, capacitor C 1 and the said cell charging current sample circuit 203 of current sampling resistor Rw, DC constant current constant voltage control chip U1 respectively; Current sampling resistor Rw connects the stitch 1,5,6 of said DC constant current constant voltage control chip U1 and the resistance R 4 in the said cell charging current sample circuit 203 respectively, and the other end of said capacitor C 1 connects the stitch 7, capacitor C 2, the positive pole of diode D, the negative pole of photoelectricity coupling resistance Ur one end, capacitor C and cell B in the UR cell charging voltage regulating circuit 202 of said DC constant current constant voltage control chip U1 respectively;
Said capacitor C 2 connects the stitch 8 of U1; The stitch 2 of said U1 connects the positive pole of inductance L, relay K 3n and cell B successively; The stitch 4 difference connecting resistance R1 of said U1, the node Z of the photoelectricity coupling resistance Ur in the UR cell charging voltage regulating circuit 202, the other end of said resistance R 1 connects node, the capacitor C between inductance L and the relay K 3n respectively.
Need to prove that the U1 chip can be constant current constant voltage control chip MC34063, this chip is the main chip of Control current and voltage; Vin can reach DC3 ~ 40V; In the utility model, said cell charge power supply Vin is 7V, and it samples Control current (we also give single-chip microcomputer with this resistance sampling electric current simultaneously) with RW; Control the Vout output voltage with the dividing potential drop of R1 and Ur, so the resistance sizes of control Ur just can reach the effect of control output voltage.Referring to Fig. 4, said cell charging current sample circuit 203 includes operational amplifier U4, and the positive input of said operational amplifier U4 is connecting resistance R5 and R6 respectively, said R6 ground connection.The reverse input end of said operational amplifier U4 is connecting resistance R4 and R3 respectively, said R3 connecting resistance R7, and said resistance R 7 connects sample rate current output Iout and capacitor C 3 respectively, and said capacitor C 3 is joined with resistance R 6.In addition, the output of said operational amplifier U4 is connected with node between said resistance R 3 and the R7, and the power input Vdd of said operational amplifier U4 is connected with the DC power supply of+12V, and the earth terminal Vss of said operational amplifier U4 connects-12V.
Referring to Fig. 4; Said UR cell charging voltage regulating circuit 202 includes a photoelectricity coupling diode that is coupled with photoelectricity coupling resistance Ur; The positive pole of said photoelectricity coupling diode connects the DC power supply of 5V respectively, the collector electrode of a triode Q2 of another termination of said photoelectricity coupling diode, the emitter connecting resistance R9 of said triode Q2 and the reverse input end of an operational amplifier U3; Said resistance R 9 ground connection; The base stage of said triode Q2 connects the output of operational amplifier U3, and the power input Vdd of said operational amplifier U3 is connected the earth terminal Vss ground connection of said operational amplifier U3 with the DC power supply of+12V.The positive input difference connecting resistance R8 of said operational amplifier U3 and the adjusting control end DV of a single-chip microcomputer DA output voltage.
On concrete the realization; Said DV end can be that the single-chip microcomputer DA output voltage that has in the single-chip computer control system 400 is used for controlling U3; U3 and triode are formed the constant-current control circuit to optocoupler diode end; The size of control optocoupler diode current has just determined the size of other end resistance Ur simultaneously, has so just reached the control of monomer charging constant voltage output.
In the utility model; On concrete the realization; In order to let said single-chip computer control system 400 can control the operating state of said relay K 3n, and then whether control carry out equalizing charge to cell B to cell equalization charging circuit 200, referring to Fig. 2, Fig. 4; On concrete the realization; Also be provided with JVn interface and Ix interface on the said single-chip computer control system 400, said JVn interface is the drive coil of the relay K 3n in the said cell equalization charging circuit 200, is used for energising and the power failure state of control relay K3n.
In the utility model; Referring to Fig. 2, Fig. 4; Sample rate current output Iout is connected in said Ix interface and the said cell equalization charging circuit 200; Whether thereby said single-chip computer control system 400 can know in the said cell equalization charging circuit 200 whether have or not charging current, promptly charging.
Need to prove that equally for a relay, it is a closure of controlling normally opened contact through energising, controls the disconnection of normally opened contact and the closure of normally-closed contact through dead electricity.
For relay K 3n; JVn interface output voltage makes its energising to K3n, the closed connection of normal E battle of K3n so, and 200 couples of cell B of at this moment said cell equalization charging circuit carry out equalizing charge; And if the JVn interface not output voltage give K3n; K3n dead electricity so, normal battle of the E of K3n breaks off, and at this moment said cell equalization charging circuit 200 no longer carries out equalizing charge to cell B.Purpose for the charged state that realizes controlling said cell equalization charging circuit 200; The cell equalizing charge enabled instruction that said single-chip computer control system 400 is exported to cell equalization charging circuit 200 is embodied as: energising and the power failure state of controlling K3n in the said cell equalization charging circuit 200 through the output voltage of regulating the JVn interface; Thereby finally reach the normal effect that battle, the E closure switched on and off of control K3n, thereby whether control cell equalization charging circuit 200 is to carrying out equalizing charge to cell B.
For the utility model; It begins to detect each cell after the power battery pack discharge; In the charging process of power battery pack, can detect the situation of the low appearance of diagnosing out monomer, if no big problem can be carried out monomer equalizing charge maintenance, make battery pack maintenance optimum.
Need to prove; For the utility model,, make some monomer voltages be charged in limited time when single-chip computer control system 400 detects through external charging or charge inside through monomer battery voltage sample circuit 300; Relay interface JK action makes K1 switch to normally closed some D; The charge circuit that is power battery pack is cut off, and the equipment of the utility model can get into monomer equalizing charge state automatically, promptly earlier to carrying out constant voltage charge behind each monomer constant current charge.
For a cell, its constant current charge process is referring to shown in Figure 4; Certain road cell charge power supply Vin enters into the DC control circuit through current sampling resistor RW, and the voltage that two ends formed when promptly resistance was through the monomer electric current is equal to or less than 300mV (the preset switches voltage of DC constant current constant voltage control chip U1); Then cut off or open output channel, so repeatedly automatically; Again through D, L, C energy storage filtering, to reach the control constant current, when the cell voltage constant current charge of certain monomer arrives upper voltage limit; Under the effect of the relay interface JVn of single-chip computer control system 400; K3n is turn-offed, after so each monomer all reaches upper voltage limit, transfer constant voltage charge to; Because the upper voltage limit that each cell sets is the same, so the voltage basis equalization of each cell at this moment.
For a cell; Its constant voltage charge process is referring to shown in Figure 4, because the internal resistance of cell and circuit etc. cause the existence of empty voltage during through electric current; So the time cell voltage do not reach real required magnitude of voltage, carry out constant voltage charge just can be stable with voltage; Resistance R 1 is gathered the voltage of output point; And come control output voltage to reach stationary value through dividing point Z (being 4 pin of U1) with photoelectricity coupling resistance Ur; And the UR circuit actual be through control to optocoupler diode one side electric current; Realize control, and then regulate monomer charging output voltage the Ur resistance value; Because single-chip microcomputer has carried out gathering to the cell voltage of each monomer and has seen Fig. 5, regulates the constant voltage adjusting that just can constitute closed loop to output voltage through PID (proportional-integral-differential) like this and control; Certain monomer constant voltage charge is after the cut-off current parameter, turn-off the K3n of JVn relay once more, and after the constant voltage charge of each cell all stopped, balanced maintenance finished.
The detection of a kind of power battery pack that Fig. 5 provides for the utility model safeguard and balanced maintenance facility in the circuit diagram of a monomer battery voltage sample circuit.
Referring to Fig. 5; Said monomer battery voltage sample circuit 300 includes the difference sample circuit that an operational amplifier U5 and resistance R 61, R62, R63, R64 form; The positive input of said operational amplifier U5 is connecting resistance R62 and R64 respectively; Said resistance R 62 is connected with the positive pole of cell B, said resistance R 64 ground connection; The reverse input end of said operational amplifier U5 is connecting resistance R63 and resistance R 61 respectively; Said resistance R 63 is connected with the negative pole of cell B; Said resistance R 61 is connected with the output of operational amplifier U5, and the output of said operational amplifier U5 is connected with sampled voltage output end vo ut; The power input Vdd of said operational amplifier U5 is connected with the DC power supply of+12V, and the earth terminal Vss of said operational amplifier U5 is connected with the DC power supply of-12V.
Accordingly; Referring to Fig. 2, Fig. 5; Also be provided with the Vx interface on the said single-chip computer control system 400; Said Vx interface is used to connect each sampled voltage output end vo ut of said multichannel monomer battery voltage sample circuit 300, thereby said single-chip computer control system 400 can obtain the monomer battery voltage that said monomer battery voltage sample circuit 300 is gathered.
Fig. 6 is for passing through utilization the utility model, and the detection of formed a plurality of battery pack is safeguarded and the balanced structured flowchart that maintains general control system.
Referring to Fig. 6; For the utility model, in order to realize high-tension big string is counted the detection control of battery pack, seeing that the single-chip microcomputer image data amount of high precision analogue AD is not too large; The for example cell voltage of each cell and charging current data; Safeguard and balanced maintenance that in order to realize a plurality of battery pack are detected the general control system of a plurality of battery pack can include a plurality of like Fig. 1, the utility model equipment shown in Figure 2, referring to shown in Figure 6; Detection shown in Figure 6 is safeguarded with balanced maintenance general control system and is included eight like Fig. 1, the utility model equipment shown in Figure 2; Be equipment 1 to equipment 8, series connection each other between these a plurality of equipment, their ground voltage difference can not be altogether when series connection simultaneously.In the utility model; Apparatus shown 1 to equipment 8 is connected with master controller through a URAT photoelectricity isolated communication interface Ut respectively; Said master control system is 32 single-chip microcomputers of a big internal memory of high speed; The data that it can collect each subsystem (being equipment 1 to equipment 8) with the electronics switching mode respectively send PC and transmission control system order down then to, and the total voltage/current acquisition of main charging and main charging still are responsible for by the single-chip microcomputer of primary importance with monomer charging switching controls.
Need to prove; The mechanics of communication that the URAT interface adopts photoelectricity to isolate realizes that the computer prison shows control, also can utilize this interface to communicate by letter with the master control machine a plurality of control system are composed in series the detection that the big string of high pressure such as electric automobile is counted battery pack and maintain, and has constituted the control system of complete machine thus.
Referring to Fig. 7; On concrete the realization; The detection of a kind of power battery pack that the utility model provides is safeguarded and balanced maintenance facility; Include casing 1; The front of said casing 11 is provided with two battery pack anchor clamps 12, and the front of said casing 11 also is provided with a plurality of cell charged state indicator light 13, battery pack charging status indicator light 14, a plurality of cell charging inlet 15 and a plurality of monomer battery voltage sampling interface 16, and the back side of said casing 11 also is provided with a photoelectricity isolation computer communication interface 17.
For the utility model, in view of the real time data amount is bigger, the dynamic and intelligent diagnosis is more loaded down with trivial details, so can adopt the PC computer as single-chip computer control system 400.
Wherein, For the low intelligent diagnostics process of holding cell be: the voltage in power battery pack is lower than under the situation of charging voltage; If the voltage of certain cell very soon prior to other cell reached the preset charging voltage upper limit and and the high voltage of voltage second between voltage difference reach preset numerical value; This cell possibly be exactly the low battery that holds or exist and seriously lowly hold fault so, thereby in time points out user such as battery producer in time to keep in repair or carry out the replacing of battery.
For the test results report of the utility model, except that record faithfully detection case as reliable detection according to the function, to diagnosis or the self check problem of coming out and fault, can be simultaneously as the voucher that reports for repairment that offers maintaining unit, so that reparation as early as possible.Testing result is to the detection diagnostic result of lithium battery group present situation before the start charging maintenance; Reflect the situation of the voltage and zero monomer voltage of high monomer voltage and minimum monomer; Detection/maintenance result be in the charging process to the diagnostic result of the low condition of showing mercy, the maintenance result is the situation that balanced maintenance finishes.
For the utility model; It detects through the dynamic process that whole power battery group master charging is reached the monomer equalizing charge; Diagnose out the working condition of overall performance and each cell of power battery pack; To abnormal problem and problem place comprehensive and accurate examining report is provided, can carries out the balanced maintenance in scene to unbalanced problem timely, make battery pack bring into play due power performance and useful life so that repair also.And this equipment is not only applicable to the lithium-ion-power cell group, as long as set suitable parameters, can also be applicable to the power battery pack of other types.
The utility model has not only been avoided the equalization problem long-term puzzlement worldwide of protection management system in the lithium power battery pack application; Opened up the way of a feasibility in the extensive use of electric motor car for lithium power battery pack; Can both play useful effect to lithium power battery pack manufacturer, electric motor car manufacturer, maintenace point and user; The development that is applied as soon as possible of its green energy resource can be advanced, and the same problem of existing other types battery power battery pack in using can be solved.
Technical scheme by above the utility model provides is visible; Compared with prior art, the utility model provides a kind of detection of power battery pack to safeguard and balanced maintenance facility that it can regularly detect maintenance to the power battery pack of lithium-ion-power cell group and other types; Carry out the electric voltage equalization maintenance when voltage of cell is unbalanced in battery pack; Thereby improve the service behaviour of power battery pack greatly, effectively prolong the useful life of whole power battery group, strengthen battery pack user's product use experience; Help enlarging the production application prospect of battery producer; Promote the application of electric motor car industry, can form the scale of industry, be of great practical significance.
The above only is the preferred implementation of the utility model; Should be pointed out that technical staff, under the prerequisite that does not break away from the utility model principle for the present technique field; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection range of the utility model.
Claims (9)
1. the detection of a power battery pack is safeguarded and balanced maintenance facility; It is characterized in that; Said power battery pack has a plurality of cells that are cascaded; This equipment includes a switching charging circuit (100), a plurality of cell equalization charging circuit (200), a plurality of monomer battery voltage sample circuit (300) and a single-chip computer control system (400), wherein:
Switch charging circuit (100), be connected with single-chip computer control system (400) with said power battery pack respectively, said switching charging circuit includes an external charger and a charge inside power supply;
Each cell equalization charging circuit (200), respectively with power battery pack in a cell be connected with single-chip computer control system (400);
Each monomer battery voltage sample circuit (300), respectively with power battery pack in a cell be connected with single-chip computer control system (400).
2. detection as claimed in claim 1 is safeguarded and balanced maintenance facility; It is characterized in that; Charging transfer relay K2 and a monomer charging transfer relay K1 inside and outside said switching charging circuit (100) also includes one; Said charge inside power supply is connected with the normally closed some A of said inside and outside charging transfer relay K2; Normal battle of the B of said external charger and said inside and outside charging transfer relay K2 is connected, and said inside and outside charging transfer relay K2 is connected with monomer charging transfer relay K1, and charge normal battle of the C of transfer relay K1 of said monomer is connected with power battery pack;
Said single-chip computer control system (400) is connected with monomer charging transfer relay K1 with said inside and outside charging transfer relay K2 respectively.
3. detection as claimed in claim 1 is safeguarded and balanced maintenance facility; It is characterized in that; Said cell equalization charging circuit (200); Include a DC constant-current and constant-voltage control circuit (201), a UR cell charging voltage regulating circuit (202) and the cell charging current sample circuit (203) that photoelectricity coupling resistance Ur is master control, said DC constant-current and constant-voltage control circuit (201) is connected with cell charging current sample circuit (203) with said UR cell charging voltage regulating circuit (202) respectively.
4. detection as claimed in claim 3 is safeguarded and balanced maintenance facility; It is characterized in that; Said DC constant-current and constant-voltage control circuit includes a cell charge power supply Vin; Said cell charge power supply Vin connects the resistance R 5 in stitch 3, capacitor C 1 and the said cell charging current sample circuit (203) of current sampling resistor Rw, DC constant current constant voltage control chip U1 respectively; Current sampling resistor Rw connects the stitch 1,5,6 of said DC constant current constant voltage control chip U1 and the resistance R 4 in the said cell charging current sample circuit (203) respectively, the positive pole of the stitch 7 of the said DC constant current constant voltage of another termination control chip U1 of said capacitor C 1, capacitor C 2, diode D, the negative pole of photoelectricity coupling resistance Ur one end, capacitor C and cell in the UR cell charging voltage regulating circuit (202);
Said capacitor C 2 connects the stitch 8 of DC constant current constant voltage control chip U1; The stitch 2 of said DC constant current constant voltage control chip U1 connects the negative pole of inductance L, diode D, succeeds the positive pole of electrical equipment K3n and cell successively; The stitch 4 difference connecting resistance R1 of said DC constant current constant voltage control chip U1 and the node Z of the photoelectricity coupling resistance Ur in the UR cell charging voltage regulating circuit (202), the other end of said resistance R 1 connects node, the capacitor C between inductance L and the relay K 3n respectively.
5. detection as claimed in claim 4 is safeguarded and balanced maintenance facility; It is characterized in that; Said cell charging current sample circuit (203) includes operational amplifier U4, and the positive input of said operational amplifier U4 is connecting resistance R5 and resistance R 6 respectively, said resistance R 6 ground connection;
The reverse input end of said operational amplifier U4 is connecting resistance R4 and resistance R 3 respectively, said resistance R 3 connecting resistance R7, and said resistance R 7 connects sample rate current output Iout and capacitor C 3 respectively, and said capacitor C 3 is joined with resistance R 6;
The output of said operational amplifier U4 is connected with node between said resistance R 3 and the resistance R 7, and the power input Vdd of said operational amplifier U4 is connected with the DC power supply of+12V, and the earth terminal Vss of said operational amplifier U4 connects-12V.
6. detection as claimed in claim 4 is safeguarded and balanced maintenance facility; It is characterized in that; Said UR cell charging voltage regulating circuit (202) includes a photoelectricity coupling diode that is coupled with photoelectricity coupling resistance Ur; The positive pole of said photoelectricity coupling diode connects the DC power supply of 5V respectively, and said photoelectricity coupling diode other end negative pole connects the collector electrode of a triode Q2;
The emitter connecting resistance R9 of said triode Q2 and the reverse input end of an operational amplifier U3, said resistance R 9 ground connection; The base stage of said triode Q2 connects the output of operational amplifier U3, and the power input Vdd of said operational amplifier U3 is connected the earth terminal Vss ground connection of said operational amplifier U3 with the DC power supply of+12V;
The positive input difference connecting resistance R8 of said operational amplifier U3 and the adjusting control end DV of a single-chip microcomputer DA output voltage.
7. detection as claimed in claim 1 is safeguarded and balanced maintenance facility; It is characterized in that; Said monomer battery voltage sample circuit (300) includes an operational amplifier U5; The positive input of said operational amplifier U5 is connecting resistance R62 and R64 respectively, and said resistance R 62 is connected with the positive pole of cell, said resistance R 64 ground connection;
The reverse input end of said operational amplifier U5 is connecting resistance R63 and resistance R 61 respectively; Said resistance R 63 is connected with the negative pole of cell; Said resistance R 61 is connected with the output of operational amplifier U5, and the output of said operational amplifier U5 is connected with sampled voltage output end vo ut;
The power input Vdd of said operational amplifier U5 is connected with the DC power supply of+12V, and the other end Vss of said operational amplifier U5 is connected with the DC power supply of-12V.
8. detection as claimed in claim 1 is safeguarded and balanced maintenance facility; It is characterized in that; Include casing (1); The front of said casing (11) is provided with two battery pack anchor clamps (12); The front of said casing (11) also is provided with a plurality of cell charged state indicator lights (13), a battery pack charging status indicator light (14), a plurality of cell charging inlet (15) and a plurality of monomer battery voltage sampling interface (16), and the back side of said casing (11) also is provided with a photoelectricity isolation computer communication interface (17).
9. detection as claimed in claim 1 is safeguarded and balanced maintenance facility, it is characterized in that, said detection maintenance and balanced maintenance facility and master controller are formed together and be used for distribution control system equipment a plurality of power battery pack, that include upper and lower computer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200227882U CN202586386U (en) | 2012-01-18 | 2012-01-18 | An inspection and maintenance and equalizing maintenance device of motive power battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012200227882U CN202586386U (en) | 2012-01-18 | 2012-01-18 | An inspection and maintenance and equalizing maintenance device of motive power battery pack |
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| CN202586386U true CN202586386U (en) | 2012-12-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051034A (en) * | 2013-01-24 | 2013-04-17 | 河南环宇赛尔新能源科技有限公司 | Equalizing charging device and control method |
| CN109450056A (en) * | 2019-01-09 | 2019-03-08 | 上海应用技术大学 | A kind of underwater robot supplying cell failure solution |
| CN110380477A (en) * | 2019-07-18 | 2019-10-25 | 广东电网有限责任公司 | A kind of accumulator super-charge control device |
| CN115833359A (en) * | 2022-12-16 | 2023-03-21 | 杭州师范大学附属医院(杭州市第二人民医院) | Intelligent stable operation method of medical equipment |
-
2012
- 2012-01-18 CN CN2012200227882U patent/CN202586386U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051034A (en) * | 2013-01-24 | 2013-04-17 | 河南环宇赛尔新能源科技有限公司 | Equalizing charging device and control method |
| CN109450056A (en) * | 2019-01-09 | 2019-03-08 | 上海应用技术大学 | A kind of underwater robot supplying cell failure solution |
| CN110380477A (en) * | 2019-07-18 | 2019-10-25 | 广东电网有限责任公司 | A kind of accumulator super-charge control device |
| CN115833359A (en) * | 2022-12-16 | 2023-03-21 | 杭州师范大学附属医院(杭州市第二人民医院) | Intelligent stable operation method of medical equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20150118 |
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| EXPY | Termination of patent right or utility model |