CN106463947B - Battery pack, battery system and charging method - Google Patents
Battery pack, battery system and charging method Download PDFInfo
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- CN106463947B CN106463947B CN201580024838.7A CN201580024838A CN106463947B CN 106463947 B CN106463947 B CN 106463947B CN 201580024838 A CN201580024838 A CN 201580024838A CN 106463947 B CN106463947 B CN 106463947B
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- battery pack
- secondary cell
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- circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00306—Overdischarge protection
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
It suitably discharges the internal current of battery pack and improves maintainability.Battery system has multiple battery packs (200) and the 2nd IC(18), battery pack (200) includes lithium ion battery (16)；The main circuit of power-supply circuit is connected in series and become with lithium ion battery (16)；The second protection circuit (62) of internal power is connected in parallel and consumed under established condition with lithium ion battery (16) and lithium ion battery (16) and main circuit is truncated and connect the switch unit of lithium ion battery (16) and the second protection circuit (62); 2nd IC(18) it is separately connected with the main circuit of each battery pack (200) and the second protection circuit; control comes from the input and output of each battery pack (200); 2nd IC(18) when detecting the output current or voltage of which the protection circuit from battery pack (200), report the exception of battery pack.
Description
Technical field
The present invention relates to battery pack and the battery system being made of multiple battery packs, in particular to from internal battery pack
Suitably carry out battery pack, battery system and the charging method of the release of residual current.The application in Japan in May, 2014
Japanese patent application No. Patent 2014-099714 filed in 13 days is basic CLAIM OF PRIORITY, these applications are by reference to reference
To the application.
Background technique
The charged secondary cell that can recycle largely is processed to battery pack and is supplied to user.Especially weight
In the high lithium ion secondary battery of energy density, in order to ensure user and the safety of electronic equipment, generally in mistake built in battery pack
Several protection circuits such as charge protection, over have the function for the output that battery pack is truncated in the case where set.
In this protection element, have by utilizing the FET(field effect transistor for being built in battery pack: Field
Effect Transistor) conduction and cut-off (ON/OFF) that is exported of switch and carry out the additives for overcharge protection or mistake of battery pack
The element of discharge prevention movement.However, it is applied lightning surge etc. in the case where FET switch short circuit destroys due to some reasons, from
And in the case where flowing through instantaneous large-current, or due to the service life of battery unit output voltage extremely decline or export instead excessive
In the case where abnormal voltage, it is also desirable to protect battery pack or electronic equipment, to avoid the accidents such as on fire.Therefore, in order in energy
In enough any abnormalities assumed in this way, the output of battery unit is also safely truncated, using the guarantor being made of fuse element
Protection element, the fuse element have with the function from external signal cutout current path.
As the protection element of the protection circuit towards such lithium ion secondary battery etc., as recorded in patent document 1
As, there is such element: between first electrode on current path, the conductor layer being connected with heater, second electrode
Connection fusible conductor and form a part of current path, by the spontaneous heating carried out using overcurrent, or be located at protect it is first
Heater inside part is come the fusible conductor on the current path that fuses.In such protection element, pass through the liquid that will be melted
The fusible conductor of body shape gathers chopping current path in the conductor layer being connected with heater.
In addition, proposing such structure: in LED light device, to each LED(Light of series connection
Emitting Diode, light emitting diode) element in parallel connects short-circuit component, made when LED occurs abnormal with given voltage short
Circuit component short circuit, so that normal LED be made to shine (patent document 2).The short-circuit component recorded in patent document 2, series connection connect
Connect multiple elements for clipping the insulative barriers layer of set film thickness with metal and constituting.
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2005-206220 bulletin
Patent document 2: Japanese Unexamined Patent Publication 2007-012381 bulletin.
Summary of the invention
Subject to be solved by the invention
Electric Vehicle), HEV(hybrid electrically vapour in recent years, using the EV(electric car of battery and motor:
Vehicle: Hybrid Electric Vehicle) obtain rapid proliferation.As the power source of HEV, EV, for energy density and output
Characteristic begins to use lithium ion secondary battery.As mobile applications, high voltage, high current are needed.Therefore, it develops and is able to bear
The special cell of high voltage, high current, but because manufacturing cost on problem and in most cases, connected by series, parallel
Multiple battery units are connect, to ensure required voltage and current using GU Generic Unit.
In addition, the module that multiple battery units are connected in series is set as battery pack, by multiple battery pack parallel configurations, from
And battery system is formed, parts swap can be carried out with battery pack unit, to seek to improve maintainability.
However, in above-mentioned battery system, in the case where a battery pack breaks down, because battery pack is matched by parallel connection
It sets, so while being not in the decline of output voltage, but output electric current can decline.Even if can be due to exporting the decline of electric current
The failure of battery is detected, can not differentiate which battery pack breaks down, the factor for hindering the raising of maintainability can be become.
The present invention is used to solve the above subject, and it is an object of the present invention to provide the protection circuit using battery pack reports the different of battery pack
Often, so that it is guaranteed that the safety of battery system and improving battery pack, battery system and the charging method of maintainability.
Solution for solving the problem
In order to solve the above problems, battery pack according to the present invention, has: secondary cell；Main circuit, with secondary cell
It is connected in series, becomes the charge and discharge path of secondary cell；Circuit is protected, is connected in parallel with secondary cell, disappears under established condition
Consume the electric power of secondary cell；Under established condition secondary cell and main circuit is truncated, and connect secondary cell in switch unit
With protection circuit；And error signal output unit, it will be defeated to outside as error signal to the output electric current of protection circuit
Out.
In addition, battery system according to the present invention, has multiple battery packs and control unit, the battery pack is included
Secondary cell；Main circuit is connected in series with secondary cell, becomes power-supply circuit；Circuit is protected, it is in parallel with secondary cell to connect
It connects, consumes internal power under established condition；And switch unit, secondary cell and the main circuit is truncated, and connect two
Primary cell and protection circuit, the main circuit and protection circuit of described control unit and each battery pack are separately connected, and control is from each
The input and output of battery pack, control unit are sentenced when detecting from the electric current of which protection circuit output of each battery pack
The mistake of disconnected battery pack.
In addition, charging method according to the present invention, is the charging method of battery pack, truncation is connected in series with secondary cell
And becoming the main circuit and secondary cell of power-supply circuit, connection is connected in parallel with secondary cell and consumes under established condition
The protection circuit and secondary cell of internal power, pass through protection circuit carry out internal discharge and will to protection circuit output electricity
At least part of stream is exported as error signal to outside battery pack.
Invention effect
According to the present invention, it can be switched to protection circuit in the case where detecting the exception of battery pack and electricity will be flowed through
The electric current of the protection circuit of pond group is exported as error signal, and the mistake of battery pack and battery system is reported by the error signal
It accidentally and is easy to determine the battery pack of output error signal, so as to improve the maintainability of battery pack.
Detailed description of the invention
Fig. 1 is the block diagram for illustrating battery system.
Fig. 2 is the block diagram for illustrating the structure of battery pack.
Fig. 3 is the block diagram for illustrating the structure of battery pack.
Fig. 4 is the circuit diagram for illustrating the movement of switching element.
Fig. 5 is the circuit diagram for illustrating the movement of battery pack.
Fig. 6 is the circuit diagram for illustrating the movement of battery pack.
Fig. 7 is the circuit diagram for illustrating the movement of battery pack.
Specific embodiment
Hereinafter, being described in detail referring to attached drawing to battery pack of the invention, battery system and charging method is applicable in.This
Outside, the present invention is not merely defined in the following embodiments and the accompanying drawings, without departing from the gist of the present invention obviously can be into
The various changes of row.In addition, attached drawing is that schematically, the ratio etc. of each size has the situation different from reality.Specific size etc. is answered
This is judged with reference to the following description.Further it is evident that attached drawing is between each other also comprising size relationship or ratio are different each other
Part.
[battery system]
Hereinafter, to be illustrated for the battery system for the module of the multiple lithium ion batteries of the parallel configuration of EV etc..
As shown in Figure 1, battery system 100 consists of the following parts: multiple battery packs 200；It is connect with these battery packs 200
And control is to the control unit 300 of the charge and discharge of each battery pack 200 etc.；And the battery pack for exporting aftermentioned error signal is shown
200 and the notification unit 400 reported.
About each battery pack 200, details is aftermentioned, but lithium ion battery and protection circuit have been carried out modularization, constitutes
For that error signal can be exported when battery exception to control unit 300 and consume internal current.
Control unit 300 is made of IC circuit etc., is controlled to the charging of each battery pack 200 or from each battery pack 200
Power supply, to carry out the control of such as motor to the inside of EV, various electric equipment part supply electric currents.In addition, control unit 300
Based on the aftermentioned error signal from battery pack 200, detection issues the exception of the battery pack 200 of error signal, utilizes notification
Portion 400 reports the exception of battery pack 200.
Notification unit 400 is connect with control unit 300, is made of luminescence unit or acoustics unit, by shine or sound equipment come
Report the exception of battery pack 200.About the specific structure of notification unit 400, due to the aftermentioned report inside battery pack 200
Know that unit is roughly the same, so omitting the description.
[battery pack]
As shown in Fig. 2, battery pack 200 includes the negative terminal 11 and plus end 12 as input and output terminal；First FET
(Field Effect Transistor, field effect transistor) 13 and the 2nd FET 14；Control the first FET 13 and the 2nd FET
14 the first IC(Integrated Circuit, integrated circuit) 15；Lithium ion battery 16；Switch main circuit and protects circuit
Switching element 17；Control the 2nd IC 18 of switching element 17；External output terminal 19；LED(Light Emitting Diode,
Light emitting diode) 20；And heat generating resistor 21.
Negative terminal 11 and plus end 12 are connect with the control unit 300 of battery system 100, formed to lithium ion battery 16 into
The main circuit (the first circuit) of row charge and discharge.In addition, negative terminal 11 and plus end 12 become logical with external output terminal 19 together
It crosses connector etc. and carrys out the interface connecting with control unit 300.
First FET 13 and the 2nd FET 14 is the transistor unit with 16 arranged in series of lithium ion battery on the main circuit.
First IC 15 is connect with the first FET 13 and the 2nd FET 14, passes through the first FET 13 and the 2nd FET 14 and 15 shape of the first IC
At the first protection circuit.
In first protection circuit, the first IC 15 and overheat detection sensor (not shown) etc. connect and judge battery pack
Whether the temperature of 200 inside is set value or more, in the case where being judged as set value or more because it is in an overheated state and
Lithium ion battery 16 is protected, so driving the first FET 13 or the 2nd FET 14 and main circuit being truncated.
In addition, the first IC 15 and current monitor (not shown) etc. connect and judge main circuit in the first protection circuit
Current value whether be set value or more, in the case where being judged as set value or more, be in overcurrent condition, in order to protect lithium
Ion battery 16 drives the first FET 13 or the 2nd FET 14 and main circuit is truncated.
Lithium ion battery 16 is configured to become desired voltage value with the multiple units of multi-stag arranged in series.Here, with
Lead-acid battery or nickel-metal hydride battery are compared, and lithium ion battery 16 is because energy density is high and electromotive force is also high, in the use of EV etc.
It is preferred on way.
On the main circuit with 16 arranged in series of lithium ion battery, the 2nd IC 18 connect switching element 17 with switching element 17.
Here, switching element 17 constitutes the switch unit of switching main circuit and the second protection circuit.
Here, the second protection circuit and 16 parallel configuration of lithium ion battery, be one end is connected to switching element 17 and
The other end is connected to the bypass path between the 2nd FET 14 and lithium ion battery 16.In second protection circuit, outside output
Terminal 19, LED(Light Emitting Diode, light emitting diode) 20 and heat generating resistor 21 be sequentially connected in series configuration respectively.
In addition, these configuration sequences are not particularly limited, but external output terminal 19 will configure near switching element 17.
External output terminal 19 is the terminal with the external connection of battery pack 200, will be output on the second protection circuit
At least part of electric current is output to the outside as error signal.Specifically, external output terminal 19 and battery system 100
Control unit 300 connects, and one of the notification means as the mistake for reporting battery pack 200 to battery system 100 functions.
The outer equipment department (not shown) of battery pack 200, hair when flowing through the second protection circuit as electric current is arranged in LED 20
The luminescence unit of light functions.Specifically, LED 20 is as the abnormal notification means hair to external notification battery pack 200
Wave function.In addition, various lamps in addition to this can also be used as luminescence unit, but particularly preferably acted with low-power, and
The LED of low cost compared with other luminescence units.
In addition, LED 20 is also functioned as a part of discharge cell in the second protection circuit.That is, because shining
And electric power is consumed, therefore the internal current of battery pack 200 can be consumed, the dump power in battery pack 200 is consumed, can be protected
Lithium ion battery 16.
Heat generating resistor 21 is as consuming one of the discharge cell for flowing through the electric current of the second protection circuit by generating heat
Divide and functions.Heat generating resistor 21 can consume the internal current of battery pack 200, consume the residue electricity in battery pack 200
Power can protect lithium ion battery 16.
Here, external output terminal 19, LED 20, heat generating resistor 21 are in second protection in parallel with lithium ion battery 16
Arranged in series is distinguished on circuit, but these sequences can also be replaced suitably, distinguish parallel configuration on the second protection circuit
It can, it is clear that be able to maintain that the notification function of the mistake of notification battery pack 200 and consuming putting for the dump power in battery pack 200
Configuration can be suitably changed in the range of Electricity Functional.
Then, the switching of the circuit carried out using the 2nd IC 18 is illustrated.As shown in figure 3, battery pack 200 and mistake
Hot-probing sensor 22 and shock transducer 23 connect.2nd IC 18 and these overheat detection sensors 22 and shock transducer
23 are separately connected.
Overheat detection sensor 22 is able to use such as PTC(positive temperature coefficient: Positive Temperature
Coefficient) thermistor etc..In addition, overheat detection sensor 22 is due to the overheat in monitoring cell group 200, so excellent
Choosing is built in each battery pack 200, but to become structure possessed by battery system 100 in the outside of battery pack 200 and carry out
Explanation.
Shock transducer 23 is able to use such as acceleration transducer.Using acceleration transducer, such as
The acceleration of fruit battery pack 200 can detect the case where EV such as is collided at the accidents when becoming set value or more.In addition,
Shock transducer 23 is due to the impact in monitoring cell group 200, it is advantageous to be built in battery pack 200, but can also be in electricity
The outside of pond group 200 and become battery system 100 possessed by structure.
Alternatively, it is also possible to being packed into EV part of the whole, such as control unit 300 can also be enable from (not shown)
ECU(control unit of engine: Engine Control Unit) etc. center control equipment department as CAN(controller area net:
Controller Area Network) signal obtains, by making the output of control unit 300 for each battery pack 200 as CAN
Acceleration information obtained from signal can integrally reduce the quantity of sensor as EV.
2nd IC 18 by overheat detection sensor 22 judge the temperature of the inside of battery pack 200 whether be set value with
On, it is in an overheated state in the case where being judged as set value or more, in order to protect lithium ion battery 16, be truncated main circuit,
The mode for being switched to the second protection circuit controls switching element 17.
In addition, the 2nd IC 18 judges the case where applying set impact to battery pack 200 by shock transducer 23, such as
In the case where judging acceleration to be more than set value, in the state that the accidents such as accident occur, in order to protect lithium ion
Battery 16 controls switching element 17 in a manner of main circuit is truncated, is switched to the second protection circuit.
In addition, describe the 2nd IC 18 in above description and connect with heating detection sensor 22 and shock transducer 23,
So as to obtain information from these sensors, but the guarantor of battery pack 200 can also be connect and inputted with other sensors etc.
Information required for protecting.At least one sensor information is inputted for the 2nd IC 18.In addition, the 2nd IC 18 is to pass through timer
Logic come even controlling structure as switching element 17 in limited time.
In addition, though the first IC 15 and the 2nd IC 18 are recorded as Different Individual, but can also be made of an IC.
In the case where being constituted with an IC, number of components can be reduced.On the other hand, the case where each IC is set as Different Individual
Under, it can make the first protection circuit and second that circuit be protected independently to act, can make defencive function that there is redundancy, become more
Add the battery pack safely taken care of.
[switching element]
Switching element 17 is specifically described.As shown in Figures 2 and 4, switching element 17 is by first terminal a, second
Four terminal components that terminal b, third terminal c and forth terminal d are constituted.Switching element 17 includes Plane Installation (not shown)
Heat generating resistor 31, fusible conductor 32 and switch 33 on insulating substrate.
The first terminal a of switching element 17 is connect with the anode of lithium ion battery 16, Second terminal b and battery pack 200
Plus end 12 connects, and third terminal c is connect with the 2nd IC 18, forth terminal d and protection circuit connection.
Switching element 17 is connected with one end of heat generating resistor 31, one end of fusible conductor 32 in inside, to first terminal a
With one end of switch 33, the other end of fusible conductor 32 is connected with to Second terminal b.In addition, switching element 17 is in third terminal c
It is connected with the other end of heat generating resistor 31, is connected with the other end of switch 33 in forth terminal d.
[switching element circuit]
Switching element 17 has the circuit structure as shown in Fig. 4 (A), Fig. 4 (B).That is, switching element 17 connects when normal
One terminal a and Second terminal b, that is, first terminal a and third terminal d insulate when normal.
Switching element 17 is constituted when fusible conductor 32 is melted because of the fever of heat generating resistor 31, passes through the fusing conductor
And switch 33(Fig. 4 (B) of short circuit).Moreover, first terminal a and forth terminal d constitutes the two-terminal of switch 33.In addition, fusible
Conductor 32 is connect with second electrode b.
Moreover, as described above, switching element 17 makes the first terminal a of the two sides of switch 33 by being fitted into battery pack 200
And forth terminal d and the main circuit of the battery pack 200 are connected in parallel, and in the case where the battery pack 200 is abnormal, make to switch
20 short circuits form the by-pass current path (the second protection circuit) bypassed to the battery pack 200.
Specifically, switching element 17 is when the lithium ion battery 16 being connected in parallel or other electronic components generate abnormal,
It is supplied electric power from the side third terminal c of heat generating resistor 31, heat generating resistor 31 is powered and generates heat.If fusible because of the heat lead
Body 32 melts, then as shown in fig. 4 (B), fusing conductor agglomerates on switch 33.First electrode a and the 4th electrode d short circuit as a result,.
That is, in switching element 17, between the two-terminal of switch 33 short-circuit (Fig. 4 (B)).
In addition, to the energization of heat generating resistor 31 because fusible conductor 32 fuses and main circuit is truncated, thus electric current to
Second protection circuit flowing, therefore preferably detect this situation and stop the supply of the electric current from third terminal c.In addition, this control
System can be controlled by the 2nd IC 18.
By switching element 17 to the electric current of the second protection circuit output, as aftermentioned error signal to battery pack 200
External output, the abnormal triggering as notification battery pack 200.
It, can be suitably using optionally switching main circuit and in addition, switching element 17 is not limited to above-mentioned construction
Structure as two protection circuits.For example, it is also possible to the method for using two FET of use illustrated with the first protection circuit.
[circuit of battery pack is constituted]
Then, the circuit structure for the battery pack 200 for being incorporated with switching element 17 is illustrated.As shown in figure 5, built-in lithium
The circuit structure of the battery pack 200 of ion battery 16 has: lithium ion battery 16；Control the first FET's 13 and the 2nd FET 14
First IC 15 of movement；Short-circuit component 17；Control the current controling element 41 and the 2nd IC 18 of the movement of short-circuit component 17；It protects
LED 20 and heat generating resistor 21 on protection circuit, via the plus end 11 of battery pack 200, negative terminal 12, terminal 51, control
Terminal 52,53 and external terminal 19 and connect with control unit 300.
Here, battery pack 200 has: the first protection circuit 61 of the charge and discharge of control lithium ion battery 16；Detect lithium from
The detection of the voltage of sub- battery 16 and the 41 output abnormality signal of current controling element to the movement of control switching element 17 is electric
Road；And the second protection circuit 62 being connect by switching element 17 with lithium ion battery 16.
First protection circuit 61 by be connected in series in the current path for flowing to lithium ion battery 16 from control unit 300 the
One FET 13 and the 2nd FET 14 and control these the first FET 13 and the 2nd FET 14 movement the first IC 15 constitute.
In battery pack 200, switching element 17 and lithium ion battery 16 are connected in series, the Second terminal b of switching element 17 with
The charge and discharge path of lithium ion battery 16 connects, and first terminal a is connect with the anode of lithium ion battery 16, to form main electricity
Road.In addition, the heat generating resistor 31 of switching element 17 connects via third terminal c and current controling element 41 in battery pack 200
It connects.
In first protection circuit 61, the first IC 15 is connect via the 2nd IC 18 with lithium ion battery 16, detects each electricity
The voltage value of pool unit, when lithium ion battery 16 is in overcharge voltage or over-discharge piezoelectric voltage, the first IC 15 is to the first FET
13 and the 2nd FET, 14 output abnormality signal.In addition, the first IC 15 also can be using the voltage value for directly detecting lithium ion battery 16
Such circuit structure.
Current controling element 41 is, for example, FET, is when utilizing the lithium ion battery from the detection signal that the 2nd IC 18 is exported
When 16 voltage value becomes the voltage more than set overdischarge or overcharge condition, so that electric current was flowed to heat generating resistor 31
The switch element that mode is acted.Current controling element 41 is by making electric current to fusible lead that fuse and the flowing of heat generating resistor 31
Body 32 acts switching element 17 in a manner of switch 33 is connected, and lithium ion battery 16 and main circuit is truncated and connects second
Protect circuit.
Current controling element 41 by the control from the 2nd IC 18, can be controlled so that with the first FET 13 and
The charging and discharging currents path of lithium ion battery 16 is independently truncated in the switch motion of 2nd FET 14, and makes switching element 17
33 short circuit of switch, main circuit is bypassed and forms the second protection circuit 62.
As shown in figure 5, such battery pack 200, when normal, the switch 33 of switching element 17 is without short-circuit, therefore electric current
Via fusible conductor 32 to 16 effluent mistake of lithium ion battery.
If detecting the electric voltage exception etc. of lithium ion battery 16, there is abnormal signal first from the 2nd IC 18 to current control
Part 41 exports, and the third terminal c of switching element 17 is connected to ground.As a result, as shown in fig. 6, having electric current flows through switching element 17
Heat generating resistor 31, thus heat generating resistor 31 generate heat.
Moreover, as shown in fig. 7, switching element 17 is heated by heat generating resistor 31, melts fusible conductor 32, to cut
Between disconnected first terminal a and Second terminal b.It as a result, as shown in fig. 7, can be from the charging and discharging currents path as main circuit
The lithium ion battery 16 with abnormal battery unit is truncated.In addition, passing through the 2nd IC's 18 after the fusing of fusible conductor 32
Control acts current controling element 41, flows electric current not, to stop the power supply to heat generating resistor 31.
Then, battery pack 200 connects the switch 33 of switching element 17, so that the electric current of lithium ion battery 16 is protected to second
Circuit 62 flows.The LED 20 of the second protection circuit 62 is lighted as a result, so as to report the exception of battery pack 200, in addition,
The electric discharge of internal current can be carried out by heat generating resistor 21.
Here, battery pack 200 is connected with external terminal 19 in the second protection circuit 62, so that flowing through the second protection circuit 62
Electric current at least part as error signal to control unit 300 export.Control unit 300 is to stop to reception mistake letter
Number the mode of charging of battery pack 200 controlled, and the exception of battery pack 200 is reported by notification unit 400.
In addition, control unit 300 both can monitor error signal with current value, can also be monitored with voltage value.That is,
Both the current value that can have monitored the electric current exported from external terminal 19, can also monitor between negative terminal 11 and external terminal 19
Voltage value.If the current value or voltage value of monitoring are set value or more, control unit 300, which is judged as, has received wrong letter
Number.In addition, set value is preferentially appropriately set at the value for excluding the degree of noise etc..
Have the battery system 100 of multiple such battery packs 200, in the case where there is exception in a battery pack 200,
Also function can be maintained by remaining normal battery pack 200 by stopping the charge and discharge to the battery pack 200.
As described above, in the battery system 100 of example according to the present invention, when battery pack 200 meets established condition
When release internal current and issue error signal to outside, so as to report mistake, therefore can individually detect each
The exception of battery pack 200, to improve the maintainabilities such as the failure replacement of battery pack 200.
In addition, the battery pack 200 of failure passes through LED 20 in the battery system 100 of example according to the present invention
Shine and can by visuognosis, and from each battery pack 200 also output error signal, therefore can be easy determine failure
Position.As a result, in the device for the replacement carried multiple battery packs 200 as EV etc. and require battery pack 200, it can obtain
Especially significant effect.
Label declaration
11 negative terminals；12 plus ends；13 the oneth FET；14 the 2nd FET；15 the oneth IC；16 lithium ion batteries；17
Switching element；18 the 2nd IC；19 external terminals；20 LED；21 heat generating resistors；22 overheat detection sensors；23 impacts
Sensor；31 heat generating resistors；32 fusible conductors；33 switches；41 current controling elements；51 ground terminals；52 control terminals
Son；53 control terminals；61 first protection circuits；62 second protection circuits；100 battery systems；200 battery packs；300 controls
Unit processed；400 notification units.
Claims (23)
1. a kind of battery pack, has:
Secondary cell；
Main circuit is connected in series with the secondary cell, becomes the charge and discharge path of the secondary cell；
Circuit is protected, is connected in parallel, is consumed in the case where detecting the exception of battery pack described secondary with the secondary cell
The electric power of battery；
The secondary cell and the main circuit is truncated in the case where the exception for detecting battery pack in switch unit, and
And connect the secondary cell and the protection circuit；And
Error signal output unit is output to the outside to the output electric current of the protection circuit as error signal.
2. battery pack as described in claim 1, wherein
It is also equipped with external terminal on the protection circuit,
The current or voltage protected on circuit is output to the outside via the external terminal as error signal.
3. battery pack as claimed in claim 1 or 2, wherein
It is also equipped with luminescence unit on the protection circuit,
Luminous by the luminescence unit carries out wrong notification.
4. battery pack as claimed in claim 1 or 2, wherein
It is also equipped with acoustics unit on the protection circuit,
Wrong notification is carried out by the sound equipment output of the acoustics unit.
5. battery pack as claimed in claim 3, wherein
It is also equipped with acoustics unit on the protection circuit,
Wrong notification is carried out by the sound equipment output of the acoustics unit.
6. battery pack as claimed in claim 1 or 2, wherein
It is also equipped with the overheat detection sensor that detection temperature rises,
Detection information of the switch unit based on the overheat detection sensor, is truncated the secondary cell and the main electricity
Road, and connect the secondary cell and the protection circuit.
7. battery pack as claimed in claim 3, wherein
It is also equipped with the overheat detection sensor that detection temperature rises,
Detection information of the switch unit based on the overheat detection sensor, is truncated the secondary cell and the main electricity
Road, and connect the secondary cell and the protection circuit.
8. battery pack as claimed in claim 4, wherein
It is also equipped with the overheat detection sensor that detection temperature rises,
Detection information of the switch unit based on the overheat detection sensor, is truncated the secondary cell and the main electricity
Road, and connect the secondary cell and the protection circuit.
9. battery pack as claimed in claim 5, wherein
It is also equipped with the overheat detection sensor that detection temperature rises,
Detection information of the switch unit based on the overheat detection sensor, is truncated the secondary cell and the main electricity
Road, and connect the secondary cell and the protection circuit.
10. battery pack as claimed in claim 1 or 2, wherein
It is also equipped with the shock transducer of detection impact,
The secondary cell and the main circuit is truncated in detection information of the switch unit based on the shock transducer, and
And connect the secondary cell and the protection circuit.
11. battery pack as claimed in claim 3, wherein
It is also equipped with the shock transducer of detection impact,
The secondary cell and the main circuit is truncated in detection information of the switch unit based on the shock transducer, and
And connect the secondary cell and the protection circuit.
12. battery pack as claimed in claim 4, wherein
It is also equipped with the shock transducer of detection impact,
The secondary cell and the main circuit is truncated in detection information of the switch unit based on the shock transducer, and
And connect the secondary cell and the protection circuit.
13. battery pack as claimed in claim 5, wherein
It is also equipped with the shock transducer of detection impact,
The secondary cell and the main circuit is truncated in detection information of the switch unit based on the shock transducer, and
And connect the secondary cell and the protection circuit.
14. battery pack as claimed in claim 6, wherein
It is also equipped with the shock transducer of detection impact,
The secondary cell and the main circuit is truncated in detection information of the switch unit based on the shock transducer, and
And connect the secondary cell and the protection circuit.
15. battery pack as claimed in claim 7, wherein
It is also equipped with the shock transducer of detection impact,
The secondary cell and the main circuit is truncated in detection information of the switch unit based on the shock transducer, and
And connect the secondary cell and the protection circuit.
16. battery pack as claimed in claim 8, wherein
It is also equipped with the shock transducer of detection impact,
The secondary cell and the main circuit is truncated in detection information of the switch unit based on the shock transducer, and
And connect the secondary cell and the protection circuit.
17. battery pack as claimed in claim 9, wherein
It is also equipped with the shock transducer of detection impact,
The secondary cell and the main circuit is truncated in detection information of the switch unit based on the shock transducer, and
And connect the secondary cell and the protection circuit.
18. a kind of battery system, has multiple battery packs and control unit, the battery pack is included
Secondary cell；
Main circuit is connected in series with the secondary cell, becomes power-supply circuit；
Circuit is protected, is connected in parallel with the secondary cell, consumes internal power in the case where detecting the exception of battery pack；
And
The secondary cell and the main circuit is truncated in switch unit, and connects the secondary cell and the protection circuit,
Described control unit is separately connected with the main circuit of each battery pack and the protection circuit, and control is from described
The input and output of each battery pack,
Described control unit is detecting the current or voltage from which the protection circuit output of each battery pack
When, judge the mistake of the battery pack.
19. battery system as claimed in claim 18, wherein
Described control unit stops the power supply to the battery pack for being judged as mistake.
20. the battery system as described in claim 18 or 19, wherein
Luminescence unit is also equipped with,
Luminous by the luminescence unit carries out wrong notification.
21. the battery system as described in claim 18 or 19, wherein
Acoustics unit is also equipped with,
Wrong notification is carried out by the sound equipment output of the acoustics unit.
22. battery system as claimed in claim 20, wherein
Acoustics unit is also equipped with,
Wrong notification is carried out by the sound equipment output of the acoustics unit.
23. a kind of charging method of battery pack, wherein
Truncation is connected in series and becomes the main circuit and the secondary cell of power-supply circuit with secondary cell,
Connection is connected in parallel with the secondary cell and consumes the guarantor of internal power in the case where detecting the exception of battery pack
Protection circuit and the secondary cell,
Internal discharge is carried out by the protection circuit and will be made at least part of the output electric current of the protection circuit
It is exported for error signal to outside battery pack.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-099714 | 2014-05-13 | ||
| JP2014099714A JP6277057B2 (en) | 2014-05-13 | 2014-05-13 | Battery pack, battery system, and discharging method |
| PCT/JP2015/063590 WO2015174398A1 (en) | 2014-05-13 | 2015-05-12 | Battery pack, battery system, and discharging method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106463947A CN106463947A (en) | 2017-02-22 |
| CN106463947B true CN106463947B (en) | 2019-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201580024838.7A Active CN106463947B (en) | 2014-05-13 | 2015-05-12 | Battery pack, battery system and charging method |
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| Country | Link |
|---|---|
| JP (1) | JP6277057B2 (en) |
| KR (1) | KR102382961B1 (en) |
| CN (1) | CN106463947B (en) |
| TW (1) | TWI688182B (en) |
| WO (1) | WO2015174398A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6727861B2 (en) * | 2016-03-11 | 2020-07-22 | 株式会社クボタ | Riding electric mower |
| KR102316487B1 (en) * | 2016-11-21 | 2021-10-25 | 주식회사 엘지화학 | The battery protection circuit for preventing malfunction of the secondary IC |
| US10517326B2 (en) * | 2017-01-27 | 2019-12-31 | Rai Strategic Holdings, Inc. | Secondary battery for an aerosol delivery device |
| CN110268547B (en) * | 2017-04-21 | 2022-08-26 | 惠普发展公司，有限责任合伙企业 | Efficiency-based battery configuration |
| KR102268681B1 (en) * | 2017-06-13 | 2021-06-22 | 주식회사 엘지에너지솔루션 | Apparatus and method for preventing over-voltage |
| KR102268682B1 (en) * | 2017-06-13 | 2021-06-22 | 주식회사 엘지에너지솔루션 | Apparatus and method for preventing over-voltage |
| CA3068694C (en) | 2017-07-24 | 2023-02-21 | Koki Holdings Co., Ltd. | Battery pack and electrical device using battery pack |
| US11621441B2 (en) * | 2018-07-27 | 2023-04-04 | The Boeing Company | Li-Ion battery high voltage distribution system architecture |
| JP6799269B2 (en) * | 2018-12-05 | 2020-12-16 | ミツミ電機株式会社 | Rechargeable battery protection circuit and battery pack |
| CN109494337A (en) * | 2018-12-31 | 2019-03-19 | 史金山 | Loose joint battery pack, loose joint battery pack charging device and charging method |
| KR102039850B1 (en) * | 2019-01-11 | 2019-11-01 | 이중오 | Energy management system using thermal image |
| KR102039851B1 (en) * | 2019-01-11 | 2019-11-01 | 이중오 | Energy management system using thermal image |
| JP7129355B2 (en) * | 2019-02-01 | 2022-09-01 | デクセリアルズ株式会社 | protection circuit |
| US11233282B2 (en) * | 2019-06-17 | 2022-01-25 | Makita Corporation | Battery-powered portable tool |
| TWI797641B (en) * | 2020-06-17 | 2023-04-01 | 日商肖特（日本）股份有限公司 | protect the circuit |
| KR20220129354A (en) * | 2021-03-16 | 2022-09-23 | 주식회사 엘지에너지솔루션 | Protection circuit for detecting deformation of fuse box |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1529396A (en) * | 2003-09-27 | 2004-09-15 | 惠州Tcl金能电池有限公司 | Lithium cell charging protection circuit |
| JP2006020497A (en) * | 2004-06-30 | 2006-01-19 | Hilti Ag | Battery pack |
| CN101079542A (en) * | 2006-05-24 | 2007-11-28 | 三星Sdi株式会社 | Battery pack |
| JP2008228518A (en) * | 2007-03-15 | 2008-09-25 | Mitsubishi Heavy Ind Ltd | Power storage system |
| CN101814724A (en) * | 2009-02-24 | 2010-08-25 | 三星Sdi株式会社 | Battery pack and over method thereof |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3382002B2 (en) * | 1994-02-28 | 2003-03-04 | 株式会社東芝 | Battery pack and equipment using battery pack for operation |
| KR19980013259U (en) * | 1996-08-30 | 1998-06-05 | 김영귀 | Battery power cut-off device for electric vehicles |
| FR2788382B1 (en) * | 1999-01-07 | 2001-03-30 | Cit Alcatel | PROTECTION FOR BATTERY MODULE WITH DIODE STORAGE |
| JP2002117911A (en) * | 2000-10-06 | 2002-04-19 | Nec Mobile Energy Kk | Battery mounted apparatus |
| JP4560825B2 (en) * | 2000-10-31 | 2010-10-13 | 日産自動車株式会社 | Assembled battery |
| JP4611644B2 (en) | 2004-01-26 | 2011-01-12 | レンゴー株式会社 | Packaging divider |
| KR100601557B1 (en) * | 2004-08-30 | 2006-07-19 | 삼성에스디아이 주식회사 | Battery management unit and its method |
| JP2007012381A (en) | 2005-06-29 | 2007-01-18 | Sony Corp | Led lighting system |
| JP2008113505A (en) * | 2006-10-30 | 2008-05-15 | Edison Power:Kk | Temperature control system for battery |
| JP2009224262A (en) * | 2008-03-18 | 2009-10-01 | Calsonic Kansei Corp | Protection device for battery controller |
| JP4687743B2 (en) * | 2008-05-02 | 2011-05-25 | ソニー株式会社 | Battery pack and control method |
| KR101329888B1 (en) * | 2009-02-05 | 2013-11-15 | 삼성에스디아이 주식회사 | Protection circuit for battery pack and battery pack with the same |
| KR101113415B1 (en) * | 2009-12-29 | 2012-03-02 | 삼성에스디아이 주식회사 | Protection Circuit for Battery Pack |
| TWI441403B (en) * | 2010-06-11 | 2014-06-11 | Hon Hai Prec Ind Co Ltd | Protecting structure for battery in charging |
-
2014
- 2014-05-13 JP JP2014099714A patent/JP6277057B2/en active Active
-
2015
- 2015-05-12 WO PCT/JP2015/063590 patent/WO2015174398A1/en active Application Filing
- 2015-05-12 KR KR1020167031339A patent/KR102382961B1/en active IP Right Grant
- 2015-05-12 TW TW104115003A patent/TWI688182B/en active
- 2015-05-12 CN CN201580024838.7A patent/CN106463947B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1529396A (en) * | 2003-09-27 | 2004-09-15 | 惠州Tcl金能电池有限公司 | Lithium cell charging protection circuit |
| JP2006020497A (en) * | 2004-06-30 | 2006-01-19 | Hilti Ag | Battery pack |
| CN101079542A (en) * | 2006-05-24 | 2007-11-28 | 三星Sdi株式会社 | Battery pack |
| JP2008228518A (en) * | 2007-03-15 | 2008-09-25 | Mitsubishi Heavy Ind Ltd | Power storage system |
| CN101814724A (en) * | 2009-02-24 | 2010-08-25 | 三星Sdi株式会社 | Battery pack and over method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015216814A (en) | 2015-12-03 |
| JP6277057B2 (en) | 2018-02-07 |
| TWI688182B (en) | 2020-03-11 |
| KR102382961B1 (en) | 2022-04-06 |
| CN106463947A (en) | 2017-02-22 |
| TW201607196A (en) | 2016-02-16 |
| WO2015174398A1 (en) | 2015-11-19 |
| KR20170003565A (en) | 2017-01-09 |
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