1]The present invention relates to a battery cell capable of measuring the temperature inside.
BACKGROUND
[2]Recently, the prices of energy resources due to the depletion of fossil fuels, are amplified interest in environmental pollution, the demand for eco-friendly alternative sources of energy has become an indispensable factor for the future life. In nuclear power, solar power, and is continuing research for a variety of power generation technologies, such as wind power, tidal power, the power storage device to use the thus producing energy in a more efficient and also it leads a great interest.
[3]
In particular, as the development of technology and demand for mobile devices and increase the demand for secondary batteries as an energy source rapidly increased, and done a lot of research on batteries that can meet a variety of needs accordingly.
[4]
In general, secondary batteries, unlike primary batteries that can not be charged, and means capable of charging and discharging batteries, mobile phones, camcorders, widely has been used in electronic devices or electric vehicles, such as notebook, especially lithium secondary batteries as power sources for electronic equipment It has a capacity at least three times than nickel-cadmium battery or a nickel hydrogen battery which is widely used, the unit is utilized degree is increased rapidly because of excellent energy density per weight.
[5]
This secondary battery according to the type of electrolyte can be classified into a lithium ion polymer battery using a lithium-ion battery and a polymer solid electrolyte using a liquid electrolyte, and an electrode assembly in accordance with the shape of the battery case to the metallic can of cylindrical or rectangular and a cylindrical battery and a prismatic battery that is embedded, the electrode assembly is classified as a pouch-shaped battery that is embedded in a pouch-shaped case of an aluminum laminate sheet.
[6]
Further, the secondary battery has a positive electrode, a negative electrode, and a bar, typically to be classified, depending on whether the membrane is made up of any structure, the electrode assembly of the stacked structure which is interposed between the positive electrode and the negative electrode is, of the long sheet-like positive and negative electrodes of the structure winding in a separator is interposed state jelly-roll type (wound type) electrode assembly, a stacked sequentially stacking a plurality of positive and negative one cut out in units of a predetermined size in a state of sandwiching the membrane-type (stack-type) electrode assembly and the like, in recent years, the jelly-to address the roll-type electrode assembly and a stacked-type electrode problem assembly having the jelly-as an electrode assembly of a step forward structure is mixed in the form of rolled and stacked, the predetermined unit stack structure in which the take-up sequentially in a state in which the position of a unit cell stacking the positive electrode and the negative electrode in a state of sandwiching the membrane on the separation film / folding type electrode Developed body lip.
[7]
Among these, a jelly-roll type electrode assembly, there is a widely used - the rolled electrode assembly is easy to manufacture and has superior energy density of advantages, in particular one storage is easy bar to the cylindrical secondary battery case jelly by weight.
[8]
However, the conventional lithium secondary battery, by an internal short circuit, allowing the current and voltage by overcharge state, exposure, falling or the like battery of the abnormal operating state to the battery's internal temperature and high pressure which is caused such as a shock due to a high temperature exceeding It can cause an explosion. That is, when the secondary battery is overheated to an abnormal operation, there is a possibility of explosion and is by gas pressure generated increases from the inside, when the temperature of the secondary battery suddenly rises because of a short-circuit current to fire with an explosion in the gas is ignited producing FIG.
[9]
Therefore, when measuring the temperature variation in the secondary battery, and if the temperature is excessively increased and the device for protecting the secondary battery against the risk of explosion or fire by stopping charging and discharging of the secondary battery has been widely used.
[10]
It is conventional to monitor the value by measuring the surface temperature of the secondary battery. However, in this case to measure the internal temperature of the secondary battery in real time and can be difficult post-action only proactive preventive measures were virtually impossible downside. In other words, as through-the like of the needle-shaped object to a short circuit within the secondary battery flows through the short circuit current, by a rapid electrochemical reaction in the positive and negative plates occurs and generates heat, the heat is conducted to the ambient temperature of the secondary battery surface to rise at a rapid pace. Therefore, one short-circuit phenomenon up to the surface temperature of the secondary battery, based on rising to the point that occurred since a certain amount of time it takes the time of detection of overheating by measuring the temperature of the surface already after a short-circuit current is significantly flow problems caused in the safety It will be.
[11]
In real time and has been developed a technique for measuring the temperature in the battery, the prior art (KR2014-0131716) is (Resistance Thermometer Detector) RTD inside to the top, summer coupler (Thermocoupler), thermistor (Thermistor) and although measured by attaching a temperature sensor, such as a cell surface, bar hayeotneun attaching a sensor member with a separate additional process in the manufacture, not only it leads to complexity, increased cost and the battery capacity is decreased in the process, according to the operating procedure there is a problem such as a limitation of the application of the roll-like stacked and the stack / folding type secondary batteries such as various types of rechargeable battery - sensor member frequent breakdown and failure or error in the measured temperature, jellies.
[12]
More specifically, and may result in long-term swelling phenomenon when using the electrodes of the battery cells, in this case, summer coupler (thermocoupler) and the temperature sensor is partially pressed into an electrode bar, which can deform the model of the electrode, such as pressing and deformation can lead to breakage of the peeling or the separation membrane of the active material in the electrode, summer coupler, as measured by the thermistor (thermistor), a problem that is not the point of accurate temperature measurement due to the response time (25 ms) present this was present.
[13]
Further, the electrolyte of the battery cell by the problem that the temperature sensor is the corrosion of metal ions which can cause a low voltage.
[14]
Thus, a situation is easy to manufacture and to minimize the production cost and a high need for development of a secondary battery capable of measuring the internal temperature is applicable to a variety of secondary cell while preventing a decrease in the battery capacity.
Detailed Description of the Invention
SUMMARY
[15]
An object of the present invention is to solve the technical problem, which has been requested from the problems, and of the prior art.
[16]
The inventors of the application have at the end of extensive research and various experiments in depth, and an electrode mixture containing an electrode active material on the positive and negative electrodes as will be described later is applied, the formation of the positive electrode and the negative electrode, the electrode terminal as the external input and output terminals and is leading to the case of forming a resistance measuring terminal on a position opposed to the external input and output terminals, it confirmed that this provides effects desired, and completed the present invention.
Problem solving means
[17]
Accordingly, the battery cell according to the present invention is a battery cell including an electrode assembly of a structure in which a separator is interposed between an anode, a cathode and an anode and a cathode,
[18]
The positive electrode and the negative electrode is an electrode material mixture containing an electrode active material on the entire one side or both sides of a house and the coating;
[19]
The positive electrode and negative electrode as an external input and output terminals of the battery cell, the first positive terminal and a first negative terminal, respectively, and are formed;
[20]
At least one of the anode and cathode is characterized in that it is formed for the resistance measurement terminals for measuring the resistance of the current collector on the opposite position of the external input and output terminals.
[21]
As it described above, as a way of generally measure the temperature of the temperature of the battery cell, a method of measuring the surface temperature of the battery or insert a separate sensor member in the interior of the battery cell is used.
[22]
However, the present invention is to form a terminal for resistance measurements on at least one of the positive electrode and the negative electrode of the battery cell, and is made in a way of measuring the resistance change in real time via a terminal for the resistance measurements, the resistance curve according to the temperature of the selected metal has a specific is it can be measured by measuring the temperature within the battery cell in real time, a change in resistance of the positive electrode and the negative electrode of the secondary battery during operation.
[23]
Thus, it is possible to operate the dictionary protection device against the explosion or ignition by measuring the temperature of battery cells in real time, it can be measured than the temperature of the precise battery cell by directly measuring the sensitive collector temperature on the temperature change, and , by combining a different outlet on the necessary positive or negative without attaching a sensor member, ease of manufacturing is ensured, the cost is reduced by replacing the expensive sensor, making the resistance measurement terminals during manufacture of the positive electrode and the negative electrode and mounting is possible because the jelly-provides the effects that can be easily applied to the battery cells of the present invention even in the manufacture of rolled, stacked, and the stack / folding type electrode assembly.
[24]
In one specific example, the first positive electrode terminal and the second to one external input and output terminals, and the terminals for resistance measurement of the same polarity with the selected external input and output terminals selected from a negative terminal electrically connected to the measuring of the collector resistance resistance measurement member; And it may further include a control unit for estimating the temperature of the battery cell in response to the resistance value of the entire house, measured from the resistance measuring member.
[25]
Said one external input and output terminals and its resistance terminals for measurement having the same polarity are particularly, but its kind is not limited, and may be electrically coupled to the at one specific example, copper, aluminum, or the connecting member made of an alloy thereof, wherein the control unit, on the basis of the temperature relationship according to the metal forming the current collector itself resistance, characterized in that for estimating the temperature from the resistance value of the measured collector.
[26]
In this case, there may be the positive or negative electrode, the electrode terminal resistance measurement is formed, the electrode assembly is as a specific example, the structure in which a positive electrode sheet and a negative electrode sheet are wound with a separator is interposed state consists of, and one end of the positive sheet electrode-polymer is, and is added to plain is not applied a first anode formed on one end of the negative sheet electrode-polymer is not applied to the portion 1 a cathode solid is formed, wherein 1 there is a first positive terminal coupled to the entire positive electrode uncoated portion house, the first may be a first cathode terminal coupled to the first full negative electrode uncoated portion home.
[27]
When jaeeon, the battery cell according to the present invention is long in a structure winding the positive electrode and the negative electrode of the sheet-type from the state in which the separator is interposed jelly-may comprise a roll-type (wound type) electrode assembly, the positive electrode sheet and negative electrode sheet each end portion may be formed additional plain that the electrode mixture is not applied to have a structure that combines the electrode terminal.
[28]
In this case, the first positive electrode and the other end of the positive electrode sheet in a position opposite to the uncoated portion, the electrode-polymer is added a second positive electrode uncoated is not applied is formed, and the second positive electrode uncoated portion current collector onto the anode for resistance measurement there may be terminals are coupled.
[29]
Further, the negative terminal for the first negative electrode and the other end of the negative electrode sheet in a position opposite to the uncoated portion, the electrode-polymer is added a second negative electrode uncoated is not applied is formed, and the second negative electrode uncoated portion home resistance measurements throughout the that can be combined.
[30]
In this case, the ohmic electrode terminals for measurement if the solid portion that is not coated with the electrode material mixture is not particularly limited in location, but, because of resistance to the measurement in the shortest distance in order to widen the range of measurement temperatures, a first it is preferable to position the negative electrode on a second uncoated portion which is located in a position facing to the second positive electrode uncoated portion or the negative electrode uncoated portion 1 which is located in a position opposite to the positive electrode uncoated portion. When jaeeon, preferably located on both ends of the electrode. However, if the temperature to be measured only for a particular region, the position of the electrode terminal is to be included in the range in which the resistance is measured.
[31]
On the other hand, the electrode assembly contained in the battery cell according to the present invention, in one specific example, a plurality of positive electrode plates and a plurality of negative plates are are constructed in a structure that is layered in the separation membrane is sandwiched state, the positive electrode plate of each of one end there protrudes the positive electrode tab that the electrode-polymer is not applied outward, and the negative electrode plate of each of one end of the electrode and polymer is not applied to the negative electrode tab, the outwardly protruding positive electrode tab to the first positive terminal is coupled to the positive electrode lead and the forms, the negative electrode tab is coupled to the cathode lead may be formed, and the first negative terminal.
[32]
Jaeeon way, it is possible to the battery cell according to the present invention includes an electrode assembly of a plurality of anode and cathode structures sequentially stacked in a state of interposing the separator (stacked) one cut out in units of a predetermined size, a plurality of electrodes the plates each has one end is an electrode tab protrudes, and they may have a structure that is coupled to the electrode lead forms an electrode terminal.
[33]
In this case, the positive electrode plate of one of the positive electrode plate can contain a number of resistance positive electrode tab for measured at a position opposite to the cathode taps are outwardly projecting, the negative electrode plate with a negative electrode plate, the resistance measured at the position opposite to the cathode taps of in for the negative electrode tab it may be outwardly protruded.
[34]
In addition, the electrode assembly contained in the battery cell in accordance with the present invention, the take-up one at a specific example, a unit cell with at least one positive plate and at least one negative electrode plate are laminated in a state that is interposed separator structure each are by splitting film is consists of a structure, and a positive electrode that does not have the positive electrode plate of each of one end of the electrode incorporated in the unit cell is coated tab is outwardly projected, a negative electrode plate of each of the one side end portion, and the cathode that is not coated with the electrode-polymer tab, which is the outwardly protruding positive electrode tab of the take-up unit cells are coupled to the positive electrode lead and forming a first positive terminal, a negative electrode tab of the take-up unit cells are coupled to the cathode lead may be formed of the first negative electrode terminal have.
[35]
Jaeeon way, the battery cell according to the present invention is the jelly-as an electrode assembly of a step forward structure is mixed in the form of rolled and stacked, separated and unit cell stacking the positive electrode and the negative electrode of a predetermined unit in a state of interposing the separator film- It may include an electrode assembly of a wound in a sequential structure (stacking / folding type) in a state where the electrode plates are each one side end portion, and the electrode is the tab is projected and the electrode tabs are coupled to the electrode leads to the electrode terminal It may have a structure which forms.
[36]
In this case, the one of the in the wound unit cell bipolar plate of the bipolar plate has, and may be a positive electrode tab for resistance measured at a position opposite to the cathode taps are outwardly projected, a negative electrode plate of the negative electrode plate in the said take-up unit cell can have a negative electrode tab for resistance measured at a position opposite to the negative electrode tabs are projected outward.
[37]
On the other hand, the battery cells according to the invention, it is possible to form a terminal for additional resistance to the measurement plane perpendicular to the anode and / or cathode side adjacent to the terminals for the resistance measurement. The plurality of terminals for the resistance measurements can is of the collector resistance is measured by the resistance measuring element is electrically connected by the connection member, corresponding to the resistance measured from which to estimate the temperature of the battery cell. Therefore, there is the effect that the flexibility to cope with the production of the bar, different types of battery cells that can be even by the electrode forming additionally a terminal resistance measurement, not using the conventional electrode terminal to measure the resistance of the battery cell, .
[38]
In one specific example, in accordance with the present invention, battery cells, it can be composed of one positive electrode tab and the negative electrode tab, and a pair resistance positive electrode tab and the resistive anode tab measurement for measurement of, above by the coupling member resistance positive electrode tab and negative electrode tab for resistance measurement for measurement of the pair are electrically connected to and resistance members are to estimate the temperature of the battery cell via the control unit is connected to the connecting member measuring the resistance of the collector, and.
[39]
In another aspect, the present invention provides a battery pack including the battery cell, and this time, the controller may measure the temperature further comprises a function to disable the electrical connection between the external input and output terminals of the battery cell when the threshold value or more.
[40]
Accordingly, the battery pack according to the present invention, through a resistance measuring terminal in real time to accurately predict a change in resistance of the battery cell, even if the battery is too hot in accordance with the abnormal operation of the battery, the temperature of the battery to a critical temperature or more pre-set in the control section It rises by automatic disconnection of the electrical connection of external input-output terminal to prevent an explosion or fire in advance is the effect that the safety provides an improved battery pack.
[41]
For reference, the battery cells included in the battery pack is not limited to these, but may be a lithium secondary battery, as a matter of course.
[42]
And the lithium secondary battery consists of a cathode, an anode, a separator and a lithium salt-containing non-aqueous electrolyte, since they are known in the art, detailed description thereof will be omitted herein.
[43]
The invention also provides a device including the battery pack as the power source. The device mobile phone, portable computer, a smart phone, a smart pad, a netbook, a wearable electronic device, LEV (Light Electronic Vehicle), electric vehicles, hybrid electric vehicles, plug-in can be selected from a hybrid electric vehicle, and a power storage device, and , the battery pack, since the structure and its method for manufacturing a device is also known in the art, detailed description thereof will be omitted herein.
Brief Description of the Drawings
[44]
1 is a perspective view showing the positive electrode and the negative electrode according to the present invention.
[45]
2 is a plan view showing that it is a resistance measurement and a control member coupled to the anode of the present invention.
[46]
3 is a perspective view showing that it is the respective electrode terminal and the electrode terminal resistance measurement coupled to the positive electrode, a separator, a negative electrode are laminated in order, and the positive and negative electrodes in accordance with the present invention.
[47]
Figure 4 is an enlarged view showing a connecting portion of the positive electrode terminal and the positive electrode plate for the positive electrode terminal and the resistance measured.
[48]
5 is an enlarged view showing a connecting portion of the negative electrode terminal and the negative electrode plate for the negative terminal and the resistance measured.
[49]
Figure 6 is a perspective view showing a structure in which the positive electrode sheet and negative electrode sheet according to the present invention is wound with a separator is interposed state.
[50]
7 is a perspective view showing a structure in which a positive electrode plate and negative electrode plate are laminated in a sandwiched state of a separator.
[51]
Figure 8 is a perspective view showing a structure in which a positive electrode plate and a negative plate are stacked with a separator is interposed state resistance measuring element and the control unit are combined.
[52]
Figure 9 is a perspective view of measuring the resistance between the positive electrode tab for resistance measurements by adding a positive electrode tab for resistance measurement.
[53]
10 is a perspective view of a plurality of positive electrode plates and a plurality of negative electrode plates are laminated with the separator is interposed state shown a structure in which the measuring resistance are coupled with the control member.
[54]
Figure 11 is an enlarged cross-sectional view of one side of the FIG.
[55]
12 is a plan view of that it is arranged in a state in which the at least one positive plate and at least one negative electrode plate via a separator, respectively.
[56]
13 is a front view showing a structure in which the take-up by at least one positive electrode plate and negative electrode plate of one or more the unit cells having a stacked structure in a state that a separator is disposed to separate the film, respectively.
Best Mode for Carrying Out the Invention
[57]
In the following description, explained with reference to embodiments according to the invention, which are for a more easy understanding of the invention, the scope of the present invention is not intended to be limited by it.
[58]
Fig. 1 is shown a perspective view of a positive electrode and the negative electrode according to the present invention, there is shown a plan view of Figure 2, indicating that the resistance is measured and a control member coupled to the anode of the present invention.
[59]
FIG. 1 and reference also included a second, the battery cell 10 according to the present invention is a positive electrode 100 and negative electrode 200 and the anode 100 and the cathode 200, a separator 300 is interposed between as a structure, the electrode material mixture containing the electrodes 100 and 200, the electrode active material (120, 220) on one surface or both surfaces of each collector (110, 210) is applied.
[60]
The electrode (100, 200) has a first electrode terminal (130, 230) is formed as an external input and output terminals of the battery cells 10, respectively, at least one of said electrodes (100, 200) has a first electrode terminal (130 , 230) has a terminal (150, 250 for resistance measurement) are formed for measuring the resistance of the current collectors 110 and 210 at the opposite position.
[61]
Specifically, the anode 100 had a positive terminal (150) for measuring resistance is formed, the cathode 200 has a cathode terminal 250 is formed on the resistance measurement.
[62]
The battery cell according to the present invention, in one specific example, the first positive electrode terminal 130 and the first negative terminal 230 that has the same polarity as one of the external input and output terminals, wherein the selected external input and output terminals selected from the resistance measurement for terminals (150, 250) and a resistance measuring element 20 it is electrically connected by the connecting member 40 to measure the resistance on the current collector (110, 210).
[63]
Resistance of the current collector (110, 210) determined from said resistance measuring element 20 is full by applying a resistance value input in is input to the controller 30, the control unit 30 to the resistance curve graph of the temperature at home It estimates the present temperature of 110 and 210.
[64]
3 had a perspective view showing that it is the respective electrode terminals and the resistor electrode terminal for measuring coupled to the positive electrode, a separator, a negative electrode are laminated in order, and the positive and negative electrodes in accordance with the present invention, Figure 4 shows the positive electrode terminal and the resistance measurement and an enlarged view showing a combination of the positive electrode terminal part is shown, FIG. 5, the negative terminal and a resistor is an enlarged view showing a connecting portion of the negative terminal is shown for measurement, Figure 6, the negative electrode sheet and positive electrode sheet in accordance with the present invention is a perspective view showing a structure in which the separation membrane is wound in a sandwiched state is shown.
[65]
When 3 to with Figure 6, the electrode assembly according to the present invention, in one specific example, wound in one of the positive electrode sheet 100 and a negative electrode sheet 200 is interposed a membrane (300) state It has a structure that is. At this time, that one end of the positive electrode sheet 100, the electrode material mixture is not the first positive electrode uncoated portion 160 is not applied is formed, is the one end of the electrode-polymer of the negative electrode sheet 200 is applied to the first anode the coated portion 260 is formed.
[66]
Of the battery cell 10 of the first positive electrode uncoated portion 160. The positive electrode collector 110 and is the first positive electrode terminal (130) coupled to the phase, of the first negative electrode uncoated portion 260 according to the invention on the negative electrode current collector 210 is coupled, the first negative terminal 230.
[67]
In one specific example, and the first positive electrode uncoated portion 160, the other end of the positive electrode sheet 100 at the location that the electrode-polymer is not applied to the second positive electrode uncoated portion 170 opposite to the are formed, the a second positive electrode uncoated portion, or 170 house the entire 110 positive terminal 150, for resistance measurements on the combination of the first negative electrode uncoated portion 260 located the other side of the negative electrode sheet 200 in the opposite to the end portion, and electrodes incorporating a and the second negative electrode uncoated portion 270 is not applied is formed, the first for the second negative electrode uncoated resistance on the collector 210 of the 270 measuring the negative electrode terminal 250 is coupled have.
[68]
Thus, the jelly - for the roll-type electrode assembly, the first negative terminal 230 and the negative electrode terminal 250 for measuring resistance which is formed on the negative electrode sheet 200 are electrically connected by the connection member 40 houses the resistance of the body (110, 210) is measured by the resistance measuring member 20, the measured resistance value is inputted to the control section 30 estimates the temperature of the collector (110, 210) in real time.
[69]
Figure 7 shows one of the positive electrode plate and negative electrode plate a, and a perspective view is shown illustrating the structure that is layered in the separation membrane is sandwiched state, Fig. 8 is a positive electrode plate and a negative plate are stacked with a separator is interposed state resistance measuring element and there is a perspective view showing a structure in which the control unit are combined is shown.
[70]
7 and Referring together to Fig. 8, the battery cell according to the present invention, in one specific example, the positive electrode plate (100 with a positive electrode mixture containing a positive electrode active material 120 on both surfaces of the positive electrode current collector 110 is applied ) and the negative electrode collector 210 as a structure in which the negative electrode mixture containing a negative electrode active material 220 on both sides of the negative electrode plate 200 that is applied are laminated in a state of interposing the separator 300 of the electrode plate (100, 200) each one side end portion, and are electrodes incorporating the projecting electrode tabs (180, 280) is not applied outward, the electrode tabs (180, 280) has a first electrode terminal is coupled to the electrode lead (not shown) ( 130, 230) to form.
[71]
In this case, the electrode plates 100 and 200, the electrode tabs (180, 280) electrodes for measuring resistance in a position opposite to the tab (190, 290) is outwardly protruding, and these electrode tabs by a connecting member 40 (180, 280), a resistor electrode tab for measuring (190, 290) and resistance measurement member 20 is electrically connected, and a control unit (30) for estimating a temperature of the battery cells to enter an additional resistance have.
[72]
This stack-type electrode assembly in one specific example, the positive electrode tab 180 at one end of the positive electrode plate 100 is projected, which is to form a first positive electrode terminal (130) in combination with a positive electrode lead (not shown) by the positive electrode tab, the positive electrode for resistance measurement in a position against the 180 tabs 190 and the connecting member 40 is electrically connected to the resistance measuring resistance element 20 of the positive electrode collector 110 by the measured and the measured resistance value is inputted to the control section 30 measures the temperature of the positive electrode collector 110 in real time.
[73]
Figure 9 is a perspective view showing that in addition to the positive electrode tab for resistance measurement which measures the resistance between the positive electrode tab resistance measurement is shown.
[74]
9, the cell 10 according to the present invention, in one specific example, a pair of electrode tabs (180, 280) and the electrode tabs (190, 190, 290 for the resistance of each pair, 290) the configuration and, which is a positive electrode tab for resistance measurement of the pair (190, 190) are electrically connected by the connection member 40, the control unit (30 for estimating the temperature of the battery cell by entering the additional resistance value) to include. Thus, the total in order to measure the internal temperature of the battery cell 10 according to the present invention not necessarily need to use the conventional electrode tab (180, 280), in addition to an electrode tab for measuring resistance (190, 290) house ( 110, 210) can be measured.
[75]
10, the plurality of close-up showing the positive electrode plate and a plurality of negative electrode plates are laminated with a separator having a through-state resistance measuring element and has a control unit is a perspective view showing a structure in which bonding is illustrated, Figure 11 is a side of FIG. 10 parts of a cross-sectional view It is shown.
[76]
When 10 and with the 11 7, the battery cell 10 according to the present invention, in one specific example, Figure 7 a positive electrode plate 100 and the negative electrode plate 200. The separator 300 shown in the structure is laminated in a sandwiched state to have a structure in which plural laminated. Specifically, the negative electrode active material 220 on both surfaces of the positive electrode plate 100, a separator 300, a negative electrode collector 210 with a positive electrode mixture containing a positive electrode active material 120 on both surfaces of the positive electrode current collector 110 is applied in the order of the negative electrode plate 200, a separator 300, which is the negative electrode material mixture is applied comprising a has a stacked structure, which are sequentially stacked.
[77]
Figure 12 is laminated in a state that each of the one or more positive electrode plates and one or more negative electrode plates are separator is a plan view that is shown, in Figure 13 each of the one or more positive electrode plates and at least one negative electrode plate to indicate that are arranged in a state of interposing the interposing a separator a unit cell having a structure that there is shown a front view showing a structure in which the take-up by the separation film.
[78]
When 12 with reference with Figure 13, the battery cell 10 according to the present invention, while in one specific example, at least one positive electrode plate 100 and at least one negative electrode plate 200 is interposed a membrane (300) a unit cell having a structure as to have a laminated structure in which the take-up by the separating film (50).
[79]
In this case, the unit cells are electrode plates (100, 200) each portion the electrode tab (180, 280) is, and is outwardly projected, the electrode tabs (180, 280) is coupled to the electrode lead (not shown) electrode terminals 130 and 230 to the electrode tabs (180, 280) position resistance electrode tab for measured at (190 opposite to the formation and has an electrode in the unit cell plate of one of the electrode plates 100 and 200 of , 290) are formed.
[80]
The stacking / folding type electrode assembly is in one specific example, the positive electrode tab 180 at one end of the positive electrode plate 100 is projected, which the positive electrode lead (not shown) and coupled to the first positive electrode terminal (130) form and the positive electrode tab is electrically connected by the connecting member 40 and the positive electrode for resistance measurement tab 190 in the position where the resistance of the positive electrode collector 110, a resistance measuring member 20 against the 180 to be measured, the measured resistance value is inputted to the control section 30 measures the temperature of the positive electrode collector 110 in real time.
[81]
In addition, the battery cell, one of the specific example, as shown in Fig. 12, A-type bi-cell 60 and the outermost is a negative electrode plate 200, which is the outermost configuration as the positive electrode plate 100 according to the present invention C-type bi-cell 70 are configured to form a structure in which the take-up by the separating film (50).
[82]
Above has been described with reference to embodiments of the invention, those skilled in the art that the invention would be possible that various and modifications within the scope of the invention as disclosed in the accompanying claims.
Industrial Applicability
[83]
As described above, in the battery cell according to the invention forms a terminal resistance measurement for measuring the collector resistance in the opposite position of the external input and output terminals to at least one of the positive and negative electrodes in real time, the collector temperature of the battery cells measuring the dictionary it is possible to operate the protection device, more precisely the battery it is possible to detect the temperature inside the cell, and safety is improved, good and fair as the economics of manufacturing, and the battery cells that can be applied to various types of the electrode assembly by It has the effect of providing.

Claims

[Claim 1]A battery cell including an electrode assembly of a structure in which a separator is interposed between a positive electrode, a negative electrode and the positive electrode and the negative electrode, the positive electrode and the negative electrode is an electrode material mixture containing an electrode active material on the entire one side or both sides of a house and the coating; The positive electrode and negative electrode as an external input and output terminals of the battery cell, the first positive terminal and a first negative terminal, respectively, and are formed; Wherein at least one of the positive and negative electrodes, the battery cells being formed for the resistance measurement terminals for measuring the resistance of the current collector on the opposite position of the external input and output terminals.
[Claim 2]
The method of claim 1, wherein the positive electrode had a positive terminal for measuring resistance is formed, the negative electrode has a negative terminal for measuring resistance is formed, the estimated temperature of the resistance measuring member and the battery cell for measuring the resistance of the current collector the battery cell according to claim 1, further comprising a control unit for.
[Claim 3]
The method of claim 1, wherein the electrode assembly is constructed in a structure in which a positive electrode sheet and a negative electrode sheet are wound with a separator is interposed state; One end of the positive sheet electrode and the polymer is added to the first positive electrode uncoated is not applied is formed, one end of the negative electrode sheet has a polymer that is not applied to the negative electrode uncoated portion 1 is formed, and; Cells, characterized in that the second and the first positive terminal coupled to the positive electrode uncoated portion 1 full house, is the first cathode terminal coupled to the negative electrode uncoated portion of the first full house.
[Claim 4]
The method of claim 3, wherein the first positive electrode and the other end of the positive electrode sheet in a position opposite to the uncoated portion, the electrode-polymer is added a second positive electrode uncoated is not applied is formed, resistance in the whole of the second positive electrode uncoated portion home cells, characterized in that the cathode terminal for an assay which is bonded.
[Claim 5]
The method of claim 3, wherein the first negative electrode and the other end of the negative electrode sheet in a position opposite to the uncoated portion, the electrode-polymer is added a second negative electrode uncoated is not applied is formed, resistance in the whole of the second negative electrode uncoated portion home cells, characterized in that the negative terminal for measuring coupled.
[Claim 6]
The method of claim 1, wherein the electrode assembly includes a plurality of positive electrode plates and a plurality of negative electrode plates are constructed in a structure which is layered in the separation membrane is sandwiched condition; The positive electrode plate of each one side end portion, and the electrode and the polymer, and the cathode tab is not applied to the outwardly projected, a negative electrode plate of the respective one end of the electrode-polymer is not applied to the negative electrode tab is projected outward; Positive electrode tabs are coupled to the positive electrode lead and forming a first cathode terminal, the battery cell characterized in that said negative electrode tabs are coupled to the negative electrode lead to form a first negative terminal.
[Claim 7]
Claim 6, wherein the positive electrode plate of one positive electrode plate, the battery cell characterized in that the positive electrode tab for resistance measured at a position opposite to the cathode taps are projecting outwardly in the.
[Claim 8]
Claim 6, wherein the negative electrode plate with a negative electrode plate, the battery cell characterized in that the negative electrode tab of the resistance measured at a position opposite to the cathode taps are projecting outwardly in the.
[Claim 9]
The method of claim 1, wherein the electrode assembly, which consists of a respective at least one positive plate and at least one negative electrode plate which are wound around the structure by the separation membrane is a unit cell having a stacked structure in a state that they sandwiched the separation film; Each one end of the positive electrode plate in the unit cell, a polymer electrode, and the positive electrode tab and is not applied is outwardly projected, a negative electrode plate of each of the one side end portion, and the negative electrode tab is projected outward that the electrode-polymer is not applied; Cells, characterized in that the positive electrode tab of the take-up unit cells, forming a first negative terminal is coupled to the positive electrode lead and forming a first positive terminal, a negative electrode tab of the take-up unit cells are coupled to the anode lead.
[Claim 10]
The method of claim 9, wherein the battery cells, characterized in that the take-up unit in a single cell bipolar plate of the positive electrode plate has a positive electrode tab of the resistance measured at the position opposite to the cathode taps are projecting outwardly.
[Claim 11]
The method of claim 9, wherein the battery cells, characterized in that the take-up unit in the cell the negative electrode plate to one of the negative electrode plate of the negative electrode is measured for resistance at a position opposite to the cathode taps tab is protruding outwardly.
[Claim 12]
The method of claim 2, wherein, based on the temperature in accordance with the correlation of the metal forming the current collector itself resistance, the battery cells, characterized in that for estimating the temperature from the resistance value of the measured collector.
[Claim 13]
According to claim 1, wherein the resistor has been formed additionally a terminal resistance measurement adjacent electrode surface perpendicular to the terminal for measuring, and to connect with the terminals for the resistance measured in the electrically by a connecting member measure of the collector resistance the battery cell according to claim.
[Claim 14]
Any one of claims 1 to 13, the battery pack comprising the battery cell according to any one of claims.
[Claim 15]
15. The method according to claim 14, wherein, the battery pack characterized in that the measured temperature is more than the threshold value comprises a time, adding the ability to turn off the electrical connection between the external input and output terminals of the battery cells.