Classifications

• • 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
  • H01M10/05—Accumulators with non-aqueous electrolyte
  • H01M10/052—Li-accumulators
• • 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
  • H01M10/05—Accumulators with non-aqueous electrolyte
  • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
  • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
  • H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
• • 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
  • H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
• • 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
  • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
• • 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
  • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
• • 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
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/61—Types of temperature control
  • H01M10/613—Cooling or keeping cold
• • 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
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/61—Types of temperature control
  • H01M10/615—Heating or keeping warm
• • 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
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/63—Control systems
  • H01M10/635—Control systems based on ambient temperature
• • 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
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/63—Control systems
  • H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
• • 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
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
  • H01M10/643—Cylindrical cells
• • 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
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
  • H01M10/647—Prismatic or flat cells, e.g. pouch cells
• • 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
  • H01M10/60—Heating or cooling; Temperature control
  • H01M10/65—Means for temperature control structurally associated with the cells
  • H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
  • H01M10/6571—Resistive heaters
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M4/00—Electrodes
  • H01M4/02—Electrodes composed of, or comprising, active material
  • H01M4/36—Selection of substances as active materials, active masses, active liquids
  • H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
• • 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
  • H01M10/05—Accumulators with non-aqueous electrolyte
  • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
  • H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
  • H01M10/0562—Solid materials
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M2200/00—Safety devices for primary or secondary batteries
  • H01M2200/10—Temperature sensitive devices
• • 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
  • H01M50/543—Terminals
  • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
  • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
• • 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
• • 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
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
  • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

• the present invention relates generally to rechargeable batteries, and more particularly, to rechargeable batteries composed of solid electrode materials and a solid electrolyte and capable of rapid heat-up from ambient temperatures to temperatures that are optimal for battery operation.
• Such batteries can have better energy density, power density, safety, and/or thermal management features and are useful for electronics, vehicles, and grid energy storage.
• An all solid-state lithium battery uses a solid state electrolyte such as a solid polymer, an inorganic lithium ion conductor, or a single-ion conductor. Coupled with lithium metal as an anode, these batteries exhibit higher energy density than lithium ion batteries employing liquid electrolytes. In addition, the solid electrolyte is nonflammable and blocks dendritic growth of lithium metal, thereby providing much improved safety.
• the present disclosure relates to configurations of an all solid-state lithium battery that are capable of rapidly and efficiently raising the temperature of the battery, e.g., raising the temperature to an optimal operating temperature range from ambient conditions.
• An advantage of the present invention is an ASLB engineered to have its internal resistance managed to change substantially according to battery temperature. Such a mechanism can cause rapid internal temperature rise in an ASLB operated from ambient temperatures.
• the ohmically modulated ASLB includes one or more resistor sheets embedded within stacks or jelly-rolls of electrode-electrolyte sheets of a conventional ASLB and possesses three terminals for operating the battery: a positive terminal, a negative terminal and a high-resistance terminal, e.g., a high resistance negative terminal.
• Embodiments of such a battery include wherein the at least one resistor sheet is configured to have at least two tabs, with one tab electrically connected to other electrode tabs in the battery to form a low-resistance terminal, and the other tab of the at least one resistor sheet electrically connected to the at least one high-resistance terminal.
• the three terminal configuration allows operation of the battery at a low-resistance level R 1 or at a high-resistance level R 2 .
• the two negative terminals can further be connected by a switch that is thermally self- activated or driven by a temperature controller such that the battery switches between the terminals for operating the battery at R 1 over a temperature range between a first temperature (T 1 ) and a second temperature (T 2 ) and the terminals for operating the battery at R 2 when the temperature of the battery is outside of either T 1 or T 2 .
• a switch that is thermally self- activated or driven by a temperature controller such that the battery switches between the terminals for operating the battery at R 1 over a temperature range between a first temperature (T 1 ) and a second temperature (T 2 ) and the terminals for operating the battery at R 2 when the temperature of the battery is outside of either T 1 or T 2 .
• such batteries can be operated at one internal resistance level over one temperature range and at other internal resistance levels at other temperatures or ranges.
• the difference between various internal resistance levels, e.g. R 1 and R 2 can be a factor of two to fifty or higher.
• Switching between different resistance levels can create rapid internal heating at low temperatures and/or improved safety of ASLBs at high temperatures.
• the battery will operate at its high internal resistance R 2 , which can generate tremendous internal heat to rapidly warm-up the battery to an optimal temperature such as 60-80 o C.
• the internal heating in an ASLB according to the present disclosure can be uniform and energy efficient. After the battery temperature reaches the optimal operating temperature, i.e. between T 1 and T 2 , the battery switches to the low resistance R 1 to operate, thereby exhibiting high power and high performance.
• the battery Under an extreme high temperature condition, e.g., during abuse or faulty events such as internal shorting where the battery temperature rises to an abnormally high value exceeding T 2 , the battery’s internal ohmic resistance can be increased sharply to R 2 , thereby curbing the shorting current and local heat generation substantially.
• the combination of much lower maximum possible current and much lower internal heat generation rate gives rise to inherent safety of the battery at high temperatures.
• Another aspect of the present disclosure includes an all solid-state lithium battery or system that includes a plurality of electrochemical storage cells that are arranged in more than one subgroup of cells, e.g., in modules.
• Each subgroup of cells can have one or more resistor sheets and each subgroup of cells can have one or more switches that can direct current through the one or more resistors sheets to form a High Resistance State or that can direct current to bypass the one or more resistors sheets to form a Low Resistance State.
• Operating such a battery or system allows one subgroup to be heated by electrical current from its own cells and/or current from other subgroup of cells, thus rapidly raising the temperature of the activated subgroup from an ambient level to an optimal operating level.
• Another aspect of the present disclosure includes a battery system comprising the all solid-state lithium battery according to any of the foregoing features and/or embodiments individually or in combination.
• the system can also include a controller that can switch between operating the battery at R 1 and operating the battery at R 2 .
• the system can include a temperature sensor for determining the temperature of T 1 and T 2 .
• the system includes an auxiliary battery to power the ASLB of the present disclosure to raise the temperature of the ASLB from an ambient level to an optimal operating level.
• FIG. 1A is a schematic showing construction of an ASLB having a resistor sheet embedded within a stack of electrode-solid electrolyte assemblies and the resulting three terminals.
• the cathode tabs can be welded together to form one positive terminal (+); the anode tabs can be welded together with one of the two tabs of the resistor sheet to form one low- resistance negative terminal LoR(-); the other tab of the resistor sheet can be used as one high- resistance negative terminal HiR(-).
• FIG. 1B illustrates an ASLB with three terminals, and a switch controlling the active state of LoR(-) and HiR(-), and hence the resistance level of the battery.
• FIGs. 2A, 2B and 2C show three characteristic resistance curves of ohmically modulated, all solid-state lithium battery according to embodiments of the present disclosure.
• FIG. 3A shows an example of an ASLB cell with four terminals, e.g., a positive and negative terminal of the battery and the two independent terminals of the resistor sheet.
• FIG.3B shows an example of a battery system having a serial connection between a plurality of ASLB cells and the resistor sheets and Switch 1 controlling the resistor level of the system.
• FIG.4 shows an example of an ASLB system with an auxiliary battery.
• the second battery with better low-temperature performance such as Li-ion batteries with liquid electrolytes, can be used to power the resistor sheets embedded in the ASLB and heat up the ASLB.
• FIG. 6 shows modeled performance comparison between a conventional ASLB and an ASLB according to an embodiment of the present disclosure.
• the present disclosure relates to an all solid-state lithium battery (ASLB) that can modulate its internal resistance according to temperature.
• ASLB all solid-state lithium battery
• ASLB refers to a rechargeable lithium-ion battery using all solid materials including a solid-state electrolyte.
• Ohmic modulation of an ASLB or an ohmically modulated ASLB refers to an ASLB engineered to have more than one internal resistance levels that can change substantially with battery temperature.
• the ASLB can comprise one level of internal resistance (R 1 ) over a temperature range of the battery between a first temperature (T 1 ) and a second temperature (T 2 ), and a second level of internal resistance (R 2 ) outside of either T 1 or T 2 .
• the value of R 2 changes abruptly, such as in a step function, or changes sharply, such as in a continuous but rapid change in resistance, below around T 1 and/or at above around T 2 .
• the value of R 2 at about 2 °C below T 1 is at least twice the value of R 1 at T 1 or the value of R 2 at about 2 °C above T 2 is at least twice the value of R 1 at T 2 .
• the value of R 2 at about 2 °C below T 1 is at least twice to fifty times the value of R 1 at T 1 and the value of R 2 at about 2 °C above T 2 is at least twice to fifty times the value of R 1 at T 2 .
• Embodiments of the present disclosure include wherein the value of R 2 /R 1 is between and including 2 to 500, e.g., the value of R 2 /R 1 is between and including 2 to 100, or 2 to 50, when the value of R 2 is determined at about 2 °C below T 1 and R 1 is determined at T 1 .
• Additional or alternative embodiments include wherein the value of R 2 /R 1 is between and including 2 to 500, e.g., the value of R 2 /R 1 is between and including 2 to 100, or 2 to 50, when the value of R 2 is determined at about 2 °C above T 2 and R 1 is determined at T 2 .
• the ohmic modulation of the battery is advantageously reversible, i.e., the internal resistance can switch back from R 2 to R 1 between T 1 and T 2 .
• the ASLB of the present disclosure can be readily configured with conventional components with minimal modification in certain embodiments.
• the all solid-state lithium battery configuration of the present disclosure includes the basic elements of an anode electrode coated on a current collector, a cathode electrode coated on another current collector and a solid electrolyte.
• the ASLB can be in the form of, for example, a pouch, cylindrical, prismatic or an angular form. Such batteries are useful for transportation, aerospace, military, and stationary energy storage applications.
• the ASLB can advantageously be configured with conventional materials and components.
• a conventional ASLB includes a positive electrode, a negative electrode, a solid electrolyte, a positive electrode current collector, a negative electrode current collector, and a battery enclosure such as an aluminum laminate pouch or a metal can.
• the negative electrode can be made of lithium metal or substantially all lithium metal as in the form of a lithium metal foil or a composition including lithium powder, for example.
• the positive electrode can contain cathode active materials.
• a battery of the present disclosure includes the above-described conventional components of an ASLB and additionally includes components to modulate the internal resistance of the battery.
• an ohmically modulated ASLB of the present disclosure includes a stack (100) having one or more resistor sheets (102) embedded within the stack of a cathode electrode, solid electrolyte, anode electrode assembly (104a, 106a, 108a and 108b, 106b, 104b).
• resistor sheet 102 has two tabs (114 and116) and each cathode electrode and anode electrode has one tab (e.g., 110a and 112a).
• Such electrode-electrolyte stacks can be assembled as jelly-rolls or other forms.
• Additional embodiments of such a battery include wherein one tab of the at least one resistor sheet is electrically connected to the negative electrode tabs to form a low-resistance negative terminal, and the other tab of the at least one resistor sheet forms a high-resistance negative terminal.
• the electrode-electrolyte stacks with the resistor sheet shown in FIG. 1A can be assembled to form a three terminal battery.
• Such a rechargeable battery can include a switch that switches the resistance levels of the battery, as shown in FIG. 1B.
• switch 120 can engage the low resistance terminals of the battery, i.e. LoR (-) 122 and (+) 126, to operate the battery when the temperature of the battery is between T 1 and T 2 , and can engage the high resistance terminal, i.e. HiR(-) 124 and (+) 126, when the battery temperature is outside of either T 1 or T 2 .
• the switch In operation, when the battery temperature is within in a normal operating range, defined as between a first temperature T 1 and a second temperature T 2 , the switch is CLOSED and the battery current bypasses the resistor sheets since current prefers to flow through the low- resistance circuit. In this case, the battery operates between the terminals (+) and LoR(-), exhibiting a low internal resistance.
• the switch is made OPEN, leaving the terminals (+) and HiR(-) operative. This forces the battery current to flow through the resistor sheets and hence exhibits high internal resistance.
• a resistor sheet is a material that has a similar or lower electrical conductivity relative to an unmodified current-collecting foil of a battery’s electrode but causes a significant increase in the internal electrical resistance of the battery when activated during battery operation.
• the resistor sheet preferably has a resistance in units of Ohm equal to the numerical value of between 0.1 to 5 divided by the battery’s capacity in Amp-hours (Ah), e.g. between about 0.5 to 2 divided by the battery’s capacity in Ah.
• the resistor sheet for a 20 Ah battery is preferably between about 0.005 Ohm (0.1 divided by 20) to about 0.25 Ohm (5 divided by 20), e.g. between about 0.025 Ohm (0.5 divided by 20) to about 0.1 Ohm (2 divided by 20).
• the ASLB of the present disclosure results in one level of internal resistance (R 1 ) over a temperature range of the battery between a first temperature (T 1 ) and a second temperature (T 2 ), and a second level of internal resistance (R 2 ) outside of either T 1 or T 2 .
• R 1 internal resistance
• T 1 first temperature
• T 2 second temperature
• R 2 second level of internal resistance
• the value of R 2 changes abruptly, such as in a step function (FIG. 2B), or changes sharply, such as in a continuous but rapid change in resistance (FIG. 2A), below around T 1 and/or at above around T 2 .
• the value of R 2 at about 2 °C below T 1 is at least twice the value of R 1 at T 1 or the value of R 2 at about 2 °C above T 2 is at least twice the value of R 1 at T 2 .
• the value of R 2 at about 2 °C below T 1 is at least twice to fifty times the value of R 1 at T 1 and the value of R 2 at about 2 °C above T 2 is at least twice to fifty times the value of R 1 at T 2 .
• the ohmic modulation of the battery is advantageously reversible, i.e., the internal resistance can switch back from R 2 to R 1 when the temperature is between T 1 and T 2 .
• T 1 can be between and include a value of about 20-60 o C, e.g., 40 o C
• T 2 can be between and include a value of about 80-120 o C, e.g., 90 o C.
• the internal resistance of the battery jumps to the higher resistance level (R 2 ).
• the temperature of the battery can be the internal temperature or external surface temperature of the battery.
• the ASLB of the present embodiment can be configured to operate at a higher resistance level when the internal temperature of the battery is below an optimum temperature, e.g. below T 1 , thereby heating the battery and improving battery performance. That is, when the battery temperature starting from the ambient is lower than its optimal operating temperature, the internal resistance of the battery becomes several-fold higher. As a result, there is much intensified internal heating (as the battery’s heat generation is proportional to its internal resistance), which leads to rapid warm-up of the battery. This in turn quickly improves power and energy output of the battery while operating at low ambient temperatures.
• the ASLB of the present disclosure switches to the low resistance mode, able to output high power and energy. This activation process usually takes less than 30 seconds and consumes less than 3% of the battery capacity. Such energy-efficient activation to get the battery ready for high performance is a major advantage of the present invention.
• the ASLB of the present disclosure can also be configured to switch to a high internal resistance once the battery’s internal temperature exceeds the high end of the normal operating range, e.g. above T 2 such as above a value of between about 85-120 o C. Temperatures that exceed the normal operating range depend upon several factors including the battery type. Such higher internal temperatures can occur during abuse or a faulty event or overcharging the battery. When the battery’s temperature exceeds T 2 , the ASLB of the present disclosure can switch to the high internal resistance causing much amplified voltage overshoot, thus facilitating early detection and shutdown of external charging systems before the battery enters a thermal runaway process.
• the higher internal resistance will release battery energy at a slower and controlled rate, thereby slowing down the rate of the cell temperature rise and preventing the cell from thermal runaway.
• This high internal resistance feature at high temperatures gives rise to an inherent safety feature of the battery.
• FIG. 3A schematically illustrates an embodiment of an all solid-state lithium battery of the present disclosure.
• the ASLB 300 includes one cell (306).
• the cell can include a cathode electrode, anode electrode and solid electrolyte (not shown for illustrative convenience).
• the ASLB has four terminals.
• the ASLB includes a positive terminal (302) and a negative terminal (304) and two terminals (310 and 312) for resistor sheet 308.
• the battery configuration in FIG. 3A is illustrated as a single cell with a single resistor sheet, the ASLB of the present disclosure can have more than one cell and/or more than one resistor sheet. Additionally, the one or more resistor sheets can be positioned between a pair of cells and/or around other positions near each or some of the cells.
• Another aspect of the present disclosure includes an all solid-state lithium battery system having a plurality of cells each of which has a positive and negative terminal.
• the cells can be adjacent each other and electrically connected to each other in a parallel or in a series arrangement or combinations thereof.
• the system further includes a plurality of resistor sheets electrically connected to each other.
• the plurality of resistor sheets can be sandwiched between adjacent cells in the plurality of electrochemical storage cells and/or inside one or more cells of the plurality of electrochemical storage cells.
• the system can further include at least a first switch electrically connected to the plurality of electrochemical storage cells and electrically connected to the plurality of resistor sheets.
• Such a switch can form a low resistance circuit by electrically connecting the plurality of electrochemical storage cells in one state (Low Resistance State) and the switch can form a high resistance circuit by electrically connecting the plurality of electrochemical storage cells through the plurality of resistor sheets in another state (High Resistance State).
• FIG. 3B schematically illustrates an all solid-state lithium battery system (301) having a negative terminal (332), a positive terminal (330), a switch (320) and a plurality of cells (306a to 306i) and resistor sheets (308a to 308i) electrically connected in series.
• a positive terminal (302a) of a first cell (306a) is electrically connected to positive terminal 332.
• the negative terminal (304a) of first cell (306a) is electrically connected to the positive terminal (302i) of another cell (306i).
• Each of the cells can include a cathode electrode, anode electrode and solid electrolyte (not shown for illustrative convenience).
• the ASLB system pack of FIG. 3B can be operated in the same manner as described for FIG.1B. That is, the ASLB is configured to have two resistance levels, R 1 and R 2 .
• the switch When the battery temperature is too low for optimal operation, e.g., below T 1 , the switch is off (i.e., in the OPEN state), and the battery pack operates at high resistance.
• the switch When the battery temperature reaches the optimal range, e.g. above T 1 , the switch is on (i.e., in the CLOSED state), and the battery pack operates at the low resistance level.
• FIG. 4 illustrates an embodiment of such a battery system.
• the battery system includes an auxiliary battery (440) and a switch (420) to electrically connect the battery to the resistor sheets of an ASLB of the present disclosure.
• the ASLB includes the same components as described for FIG. 3B for ease of reference. As shown in FIG.
• the system includes a negative terminal (432), a positive terminal (430), switch (420) and the components of an embodiment of an ASLB of the present disclosure, e.g., a plurality of cells (306a to 306i) and resistor sheets (308a to 308i) and switch 320.
• the battery system of the present disclosure allows operation of the resistor sheets when the temperature is too low for the ASLB to power itself.
• the auxiliary battery with better low-temperature performance such as a Li-ion battery with a liquid electrolyte, can be used to power and heat up the resistor sheets and hence the ASLB.
• the ASLB battery is set at open circuit, e.g. switch 320 is set to OPEN.
• Switch 420 which is serially connected with auxiliary battery 440, is turned on by a controller. In this way, the resistor sheets inside the ASLB are connected to the second auxiliary battery that can operate below T o and heat up the ASLB.
• Switch 2 is off and ohmic modulation by ASLB itself comes into play as fully described above.
• FIG. 5 schematically illustrates an embodiment of an ASLB system having a plurality of cells and plurality of resistor sheets.
• the cells can be divided into several subgroups of cells, which can also be referred to as a module or pack of cells.
• the cells are divided into subgroup A, B, up to subgroup I.
• Subgroup A includes a plurality of cells (represented by 506a) which can be electrically connected in series and a plurality of resistor sheets (represented by 508a) which can be electrically connected in series and at least one switch (520a) that can form a low resistance circuit by electrically connecting the plurality of cells to bypass the resistor sheets (Low Resistance State) and that can form a high resistance circuit by electrically connecting the plurality of cells through the plurality of resistor sheets (High Resistance State).
• Subgroup B also includes a plurality of cells (506b), a plurality of resistor sheets (508b) and at least one switch (520b).
• the ASLB system of FIG.5 can include additional subgroups of cells and resistor sheets up to a final subgroup illustrated as subgroup I, which also includes a plurality of cells (506i), a plurality of resistor sheets (508i) and at least one switch (520i).
• the negative terminal (504b) of the first subgroup (subgroup A) is electrically connected to a negative terminal (532) for connecting the battery to a load and the positive terminal (502i) of the last subgroup (subgroup I) is electrically connected to a positive terminal (530) for connecting the battery to a load.
• Each of the subgroups are electrically connected in series by electrically connecting a positive terminal from one subgroup to the negative terminal of another subgroup (i.e., electrically connecting terminals 502a to 504b etc.).
• each of the subgroups of FIG. 5 can be arranged as shown in FIG. 3B. That is, each subgroup in FIG.5 can have a plurality of cells and resistor sheets and a switch where each cell has a positive and a negative terminal that are electrically connected in series and each subgroup of cells has one or more resistor sheets serially connected between the first cell and the last cell.
• Each of the cells can include a cathode electrode, anode electrode and solid electrolyte.
• Each subgroup can include any number of cells, e.g., from about 3 to about 200 and any number of resistor sheets serially connected between the first cell and the last cell.
• the 5 can be operated such that all of the subgroup of cells are in a high resistance state or low resistance state simultaneous or different subgroups can be activated in the high resistance state at different times.
• one subgroup of cells can be activated by setting its switch to off (i.e., in the OPEN state) (High Resistance State) while the switches in the other subgroups are set to the CLOSED state (Low Resistance State).
• the electrical current of the activated subgroup and the electrical current from non-activated subgroups power the one or more resistor sheets of the activated subgroup to elevate its temperature.
• Other subgroups can then be activated.
• a cascade activation can be implemented by activating one module only, say subgroup A, which can be done by turning switch 520a to the OPEN state and turning switches 520b and 520i to the CLOSED state. This way, only the resistor sheets in subgroup A are heated and thus subgroup A is activated.
• the ASLB system of this embodiment can also include an auxiliary battery to power the resistor sheets at low temperatures.
• the battery configuration of the present disclosure can be applied to a variety of cathode materials, anode materials, and solid-state electrolyte materials. Such batteries are useful for transportation, aerospace, military, and stationary energy storage applications.
• Each ASLB can comprise a pouch cell case and a stacked electrode-electrolyte assembly in it.
• the electrode-electrolyte assembly was designed as a plurality of positive electrode elements each comprising an aluminum current collector and a positive electrode coated on both sides of the current collector, a plurality of negative electrode elements each comprising a copper current collector and a negative electrode coated on both sides of the current collector, and an electrolyte material separating the adjacent positive electrode element and negative electrode element.
• High-capacity Ni-rich NCM material (220mAh/g) was chosen in the design formulation of all positive electrodes.
• a composition of 80/6/14 (wt%) NCM/carbon/solid electrolyte was chosen for this design.
• Lithium powder (LiP) was chosen to formulate all negative electrodes.
• a composition of 40/10/50 (wt%) LiP/carbon/solid electrolyte was chosen for the design.
• a thin film of solid electrolyte (5 ⁇ m) was chosen as the separator between the composite positive and negative electrodes of approximately 83 ⁇ m and 38 ⁇ m in thickness respectively.
• compositions of these electrolytes were chosen to be: (a) solid polymer electrolyte, poly(ethylene oxide): lithium bis(trifluoromethane sulfonyl) imide (PEO:LITFSI) of 18:1; (b) inorganic Garnet type solid electrolyte, Li 6 La 2 BaTa 2 O 12 ; (c) single-ion conductor, anionic block copolymer electrolyte (A-BCE), i.e. P(STFSILi)-PEO-P(STFSILi), with 17% wt% of P(STFSILi).
• ASLBs designed with each of these electrolytes are labeled herein as ASLB(a), ASLB(b) and ASLB(c), respectively.
• a switch between the LoR(-) and HiR(-) terminals is carried out by an electromechanical relay driven by a controller measuring the battery surface temperature.
• the relay is set to switch at temperature T 1 .
• the ambient temperature is 25°C for all three ASLBs, and T 1 is set at 50°C for ASLB(a) and ASLB(b), while T o is set at 55°C and T 1 is set at 80°C for ASLB(c). This is because the solid electrolyte (c) barely provides any conductance below 55°C.

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• 2015
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