Method and system for utilizing hydrogen gas generated by lithium-ion batteries

Abstract

To provide a method of using hydrogen gas generated from a lithium ion battery, the method enabling the hydrogen gas generated from the lithium ion battery to be safely and effectively used without causing environmental problems, and a system for the same.SOLUTION: A method of using hydrogen gas generated from a lithium ion battery has: a generation hydrogen gas delivering step of delivering hydrogen gas generated in each of cells 14-1, 14-4 configuring a lithium ion battery 14 to a gasoline particulate filter 46 side while a hybrid vehicle mounted with a lithium ion battery 14 travels; and a generated hydrogen gas delivering / combustion step of jetting and supplying the delivered hydrogen gas into the gasoline particulate filter 46 and combusting the hydrogen gas together with exhaust gas of the hybrid vehicle.SELECTED DRAWING: Figure 1

Description

Technical Field

[0006]

[0001] The present invention relates to a method for using hydrogen gas generated by a lithium-ion battery and a system thereof, and particularly to a method for using hydrogen gas generated from a lithium-ion battery in a hybrid vehicle and a system thereof.

Background Art

[0002] A lithium-ion battery for driving a hybrid vehicle has the characteristic of generating gas due to use at high temperature, overcharging, or deterioration over time. The gas is mainly hydrogen gas and also includes other gases toxic to the human body.

[0003] Although a lithium-ion battery is sealed in a can for each of the plurality of cells constituting it, depending on the amount of gas generated, there is a risk that the internal pressure in the can increases, causing various problems such as deformation of the can.

[0004] Patent Document 1 discloses an assembled battery composed of a plurality of unit batteries. Each unit battery is provided with a safety valve that is opened to relieve the internal pressure when it reaches a predetermined pressure against the increase in internal pressure due to hydrogen gas generation. And a configuration is disclosed in which the discharge ports of these safety valves are connected to an exhaust gas tube connected to an external exhaust portion.

[0005] Also, the connection portions between the respective safety valve discharge ports of this exhaust gas tube have a bellows structure. Even if the unit battery expands and deform due to internal pressure, this deformation is absorbed by the bellows structure, maintaining a good connection state between each safety valve discharge port and the exhaust gas tube, and configured to reliably discharge the generated hydrogen gas to the outside of the vehicle without leaking into the vehicle interior.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Disclosure of the Invention

[0007] According to the configuration of Patent Document 1, hydrogen gas generated from the battery is reliably released outside the vehicle without leaking into the vehicle. However, the generated hydrogen gas contains components harmful to the human body, and even if it can be released outside the vehicle, environmental problems remain.

[0008] This invention has been made in view of the above-mentioned problems, and its purpose is to provide a method and system for utilizing hydrogen gas generated by lithium-ion batteries, which can be used safely and effectively without causing environmental problems. [Means for solving the problem]

[0009] In order to achieve the above objective, One embodiment of the present invention teeth, A hydrogen gas supply process for sending hydrogen gas generated in each cell constituting the lithium-ion battery to the gasoline particulate filter side while a hybrid vehicle equipped with a lithium-ion battery is in operation, The hydrogen gas supplied is injected into the gasoline particulate filter and burned together with the exhaust gas of the hybrid vehicle in a hydrogen gas supply and combustion process, It is characterized by having the following features.

[0010] This method allows hydrogen gas generated by a lithium-ion battery to be injected into the gasoline particulate filter (GPF) and burned, thereby reducing the emission of hydrogen gas outside the vehicle. In other words, the harmful components contained in the hydrogen gas are rendered harmless through combustion. Furthermore, since the generated hydrogen gas is burned together with the exhaust gas, it is possible to prevent harmful particles contained in the exhaust gas from accumulating on the gasoline particulate filter. Therefore, it is possible to add beneficial effects such as preventing clogging of the gasoline particulate filter.

[0011] One embodiment of the present invention is the aforementioned In a method for utilizing hydrogen gas generated by lithium-ion batteries, The generated hydrogen gas supply process includes a generated hydrogen gas storage operation in which the hydrogen gas generated in each cell is drawn in and stored in a predetermined location. In the hydrogen gas storage operation, intake is performed for each cell when the amount of hydrogen gas generated in each cell exceeds a predetermined value. The hydrogen gas injection supply in the hydrogen gas generation process is characterized by being carried out by supplying the stored hydrogen gas.

[0012] This allows for intake in accordance with the amount of hydrogen gas generated in each cell, i.e., according to the need for emission, and also enables control such as supplying hydrogen to the gasoline particulate filter at the appropriate timing by temporarily storing it.

[0013] One embodiment of the present invention is the aforementioned In a method for utilizing hydrogen gas generated by lithium-ion batteries, The determination of the amount of hydrogen gas generated in each of the aforementioned cells is as follows: Each of the above Ru Operation information acquisition operation, which acquires operational information including current value, voltage value, and temperature value while the vehicle is running, This is characterized by performing a calculation and estimation operation of the amount of hydrogen gas generated in each cell based on the aforementioned operating information, and based on the above.

[0014] This method makes it possible to calculate and estimate the amount of hydrogen gas generated in each lithium-ion battery cell without actually measuring it for each cell, to determine the hydrogen gas generation status in each cell, and to select a cell suitable for storing the generated hydrogen gas by intake.

[0015] One embodiment of the present invention is the aforementioned In a method for utilizing hydrogen gas generated by lithium-ion batteries, The clogged state of the gasoline particulate filter is determined based on the pressure loss data of the gasoline particulate filter, and the clogged state is determined when the pressure loss is greater than or equal to a predetermined value. The generated hydrogen gas supply and combustion process is characterized in that it is performed when it is determined that the clogging state exists.

[0016] By this method, when the gasoline particulate filter is clogged and the pressure loss increases, for example, when the pressure loss exceeds a predetermined pressure loss value (threshold value), the generated hydrogen gas supply and combustion process is performed to eliminate the clogging of the gasoline particulate filter. That is, it is possible to eliminate the clogging by the combustion of the exhaust gas and hydrogen gas in the gasoline particulate filter described above.

[0017] To achieve the above object, One embodiment of the present invention the lithium-ion battery-generated hydrogen gas utilization system has an operating information acquisition unit that acquires operating information including the current value, voltage value, and temperature value during vehicle travel of each cell of the lithium-ion battery, Ru a calculation and estimation unit that calculates and estimates the amount of hydrogen gas generated in each cell based on the operating information, a generated hydrogen gas storage unit that sucks the hydrogen gas generated in each cell and stores it in a predetermined location, an injection means that injects and supplies the stored hydrogen gas into the gasoline particulate filter, and a generated hydrogen gas supply and combustion unit that burns the hydrogen gas together with the exhaust gas of the hybrid vehicle by the injection supply, and a control unit that causes the generated hydrogen gas storage unit to inject and supply hydrogen gas into the gasoline particulate filter when the amount of hydrogen gas generated calculated by the calculation and estimation unit exceeds a predetermined value in each cell. record water It is characterized by having

[0018] ​​According to this system, the hydrogen gas generated in the lithium-ion battery can be injected and supplied into the gasoline particulate filter (GPF) for combustion. Therefore, the emission of hydrogen gas to the outside of the vehicle can be reduced. That is, the harmful components contained in the hydrogen gas to the human body are rendered harmless by being burned. In addition, since the generated hydrogen gas is burned together with the exhaust gas, it is possible to avoid the deposition of various harmful particles contained in the exhaust gas on the gasoline particulate filter. Therefore, good effects such as eliminating the clogging of the gasoline particulate filter can be added.

Advantages of the Invention

[0019] According to the method for utilizing hydrogen gas generated by a lithium-ion battery and its system of the present invention, hydrogen gas containing harmful components to the human body generated in each cell of the lithium-ion battery is burned together with the exhaust gas of the hybrid vehicle in the gasoline particulate filter. Therefore, the emission of hydrogen gas to the outside is reduced and prevented. Furthermore, the combustion of the exhaust gas together with the hydrogen gas also contributes to eliminating the clogging of the gasoline particulate filter. As a result, the problem of adverse effects on the natural environment is also suppressed, and the use of lithium-ion batteries in hybrid vehicles is promoted.

Brief Description of the Drawings

[0020] [Figure 1] It is a schematic configuration diagram of a system for utilizing hydrogen gas generated by a lithium-ion battery of the present invention. [Figure 2] It is a flowchart of a method for utilizing hydrogen gas generated by a lithium-ion battery of the present invention. In particular, it is the control flow (first half) of the hydrogen gas generation calculation unit. [Figure 3] It is a flowchart of a method for utilizing hydrogen gas generated by a lithium-ion battery of the present invention. In particular, it is the control flow (second half) of the hydrogen gas generation calculation unit. [Figure 4] It is a flowchart of a method for utilizing hydrogen gas generated by a lithium-ion battery of the present invention. In particular, it is the control flow of the hydrogen gas storage unit. [Figure 5]This is a flowchart of the lithium-ion battery hydrogen gas utilization method of the present invention. In particular, it shows the control flow for the hydrogen gas supply and combustion section. [Modes for carrying out the invention]

[0021] The lithium-ion battery hydrogen gas utilization method and system of the present invention will be described in detail below with reference to the drawings. In this embodiment, the lithium-ion battery consists of four cells, and the method of utilizing the hydrogen gas is to inject the generated hydrogen gas into a gasoline particulate filter (GPF) and burn it together with the exhaust gas of the hybrid vehicle.

[0022] Figure 1 is a schematic diagram of the lithium-ion battery hydrogen gas utilization system in this embodiment. The lithium-ion battery hydrogen gas utilization system 10 includes a hydrogen gas calculation unit 12 that calculates and estimates the amount of hydrogen gas to be generated, a hydrogen gas storage unit 30 that carries out the hydrogen gas storage process, and a hydrogen gas supply and combustion unit 40 that supplies the generated hydrogen gas into a particulate filter 46 and burns it.

[0023] The generated hydrogen gas supply process is the process of supplying hydrogen gas generated in each cell 14-1 to 14-4 that make up the lithium-ion battery 14 while the hybrid vehicle is running to the gasoline particulate 46 side. In this embodiment, however, it refers to the process from when the generated hydrogen gas calculation unit 12 estimates that hydrogen gas has been generated in a cell, when the generated hydrogen gas is drawn in by the intake device 32 of the generated hydrogen gas storage unit 30 and stored in the storage tank 34, until the hydrogen gas injection device 42 of the generated hydrogen gas supply and combustion unit 40 injects the hydrogen gas stored in the storage tank 34 into the gasoline particulate filter 46.

[0024] The hydrogen gas generation calculation unit 12 comprises a lithium-ion battery 14 composed of four cells 14-1 to 14-4, an operation information acquisition unit 22 that acquires operation information including current value, voltage value, and temperature value for each cell during vehicle operation, an estimation unit 24 that calculates the amount of hydrogen gas generated by each cell based on this operation information, and a cell information recording unit 26 that records information for each cell.

[0025] The generated hydrogen gas storage unit 30 includes a hydrogen gas storage tank 34 for storing hydrogen gas, an intake device 32 for drawing in hydrogen gas generated in each cell 14-1 to 14-4, and a storage tank information recording unit 36 ​​for recording information about the hydrogen gas storage tank 34.

[0026] The generated hydrogen gas supply and combustion unit 40 includes a gasoline particulate filter 46, a hydrogen gas injection device 44 that injects stored generated hydrogen gas into the gasoline particulate filter 46, and an exhaust gas pipe 50 that introduces exhaust gas from the hybrid vehicle into the gasoline particulate filter 46. Each of the parts and devices described above is controlled by the control unit 48. The operation of each part will be described below, followed by a detailed description of the control flow of each part.

[0027] Gasoline particulate filters adsorb particulate matter (PM) and harmful gases (CO, NOx, HC) generated when gasoline burns, and are usually used in the presence of a catalyst. Although gasoline particulate filters can become clogged due to the adsorption of particulate matter and harmful gases, introducing high-temperature exhaust gas from a vehicle into the gasoline particulate filter, for example, further raises the temperature through a chemical reaction in the catalyst present inside, burning and neutralizing the adsorbed particulate matter and harmful gases. This combustion eliminates clogging of the gasoline particulate filter. Alternatively, a means of raising the temperature of the exhaust gas may be provided instead of a catalyst.

[0028] The hydrogen gas generation calculation unit 12 calculates and estimates whether hydrogen gas is generated in the four cells 14-1 to 14-4 of the lithium-ion battery 14 while the hybrid vehicle is running. This calculation and estimation is performed by the calculation and estimation unit 24 (see flowchart 2 below for details).

[0029] Operating information, including current, voltage, and temperature values ​​of cells 14-1 to 14-4 during hybrid vehicle operation, is acquired by the operating information acquisition unit 22. Based on this operating information, the calculation and estimation unit 24 estimates whether or not hydrogen gas is being generated. An example of the estimation method is explained in the control flow described later, but it is based on the acquired current, voltage, and temperature values. Information for each cell, such as whether or not hydrogen gas generation is estimated, is recorded in the cell information recording unit 26.

[0030] When hydrogen gas generation is estimated in the four cells 14-1 to 14-4, the generated hydrogen gas storage unit 30 draws in the generated hydrogen gas with the intake device 32 and stores it in the storage tank 34 while the hybrid vehicle is stopped.

[0031] In this embodiment, each cell is housed in a can, and each cell's can is fitted with an on-off valve 16-1 to 16-4. Each on-off valve 16-1 to 16-4 is opened and closed by a command from the control unit 48, and the respective outlets 18-1 to 18-4 of the on-off valves 16-1 to 16-4 are connected by a single exhaust duct 20. The exhaust duct 20 is connected to the intake device 32 of the generated hydrogen gas storage unit 30 by a connecting pipe 28. The on-off valve 16 of the cell in which the generated hydrogen gas has been calculated and estimated is opened, and the hydrogen gas is drawn in by the intake device 32 and stored in the storage tank 34.

[0032] The generated hydrogen gas supply and combustion unit 40 burns the hydrogen gas stored in the storage tank 34 together with the exhaust gas of the hybrid vehicle in the gasoline particulate filter 46 when the gasoline particulate filter 46 is clogged. The storage tank 34 of the generated hydrogen gas storage unit 30 is connected to the hydrogen gas injection device 44 of the generated hydrogen gas supply and combustion unit 40 by a connecting pipe 42. Hydrogen gas is supplied from the hydrogen gas injection device 44 into the gasoline particulate filter 46, and the exhaust gas of the hybrid vehicle is introduced from the exhaust gas pipe 50 which is in communication with the engine combustion chamber.

[0033] Figures 2 and 3 are control flow diagrams for the hydrogen gas generation unit 12.

[0034] First, the ignition (IG) is turned ON (step S23). Turning the IG ON turns on the power to each part, including the control unit 48. Next, the contactor is connected (step S24). By connecting the contactor, the lithium-ion battery 14 is connected to the electric motor (not shown), and the hybrid vehicle becomes capable of running.

[0035] The following control is performed while the hybrid vehicle is in motion. The voltage values ​​of the four cells 14-1 to 14-4 are acquired (step S25), the temperature value of each cell is acquired (step S26), and the current value of each cell is acquired (step S27). This operational information is obtained by measurement using the operational information acquisition unit 22 or by voltmeters, ammeters, and thermometers provided in or near each cell, and the measured values ​​are sent to the control unit 48.

[0036] The calculation and estimation unit 24 determines whether the four cells 14-1 to 14-4 exceed the specified value (threshold) for hydrogen generation (step S28). The specified value (threshold) for hydrogen generation is determined from the current value, voltage value, and temperature value measured for each of the four cells 14-1 to 14-4. If the specified value (threshold) is exceeded (step S28, Yes), the cell number and "hydrogen gas generated" are recorded in the cell information recording unit 26 (step S29), and step S30 is executed. Here, the specified value (threshold) is determined, for example, by setting standard values ​​(minimum values) for the current value, voltage value, and temperature value, and creating a correspondence table between the sum of the increases from each standard value of the measured value and the amount of hydrogen gas actually generated so far. This allows the amount of hydrogen gas generated to be immediately estimated from the sum of the increases from each standard value of the measured value. If the answer in step S28 is NO, step S30 is executed.

[0037] In step S30, it is determined whether a contactor connection command has been received. If a connection command has been received, the vehicle is still scheduled to travel; if no connection command has been received, the vehicle will stop. If no command has been received, the contactor is disconnected (step S31) and the vehicle is stopped. If a connection command has been received, step S25 is executed.

[0038] Next, cell information for the four cells 14-1 to 14-4 is obtained from the cell information recording unit 26 (step S32), and it is determined whether or not hydrogen gas is generated during this trip (step S33). This determination is made by collecting the cell information from each cell. Specifically, the sum of the estimated amount of hydrogen gas generated in each cell is determined.

[0039] If it is determined in step S33 that generation has occurred, the activation of the "generated hydrogen gas storage unit" 30 is set to "reserved" (step S34). After this, as will be described later, the generated hydrogen gas in the cell is drawn out and disappears, so "no generated hydrogen gas" is recorded in the corresponding cell of the cell information recording unit 26 (step S35).

[0040] Next, the ignition is turned OFF (step S36). This operation turns off all power to the hybrid vehicle. After a predetermined time has elapsed, or if the hybrid vehicle is not scheduled to be used at night, it is self-wake up (step S37). This operation enables various controls by the control unit 48. Next, it is determined whether there is a "reservation" in the generated hydrogen gas storage unit 30 (step S38). If there is a reservation, the "generated hydrogen gas storage unit" 30 is started (step S39), and the control flow of the generated hydrogen gas calculation unit 12 is terminated. If there is no reservation in the generated hydrogen gas storage unit 30, the control flow of the generated hydrogen gas calculation unit 12 is also terminated.

[0041] In the control flow of the generated hydrogen gas calculation unit 12, once the generated hydrogen gas storage unit 30 is started, the following control flow of the generated hydrogen gas storage unit 30 is executed.

[0042] Figure 4 shows the control flow of the generated hydrogen gas storage unit 30. First, the cell number from which the generated hydrogen gas is estimated is read from the cell information recording unit 26, and the on / off valve 16 for the corresponding cell number is opened (step S42). This opening is performed by a command from the control unit 48. Then, the generated hydrogen gas is drawn into the storage tank 34 by the intake device 32 (step S43), and the amount of gas in the storage tank 34 is measured (step S44). This measurement is performed by a volume meter or the like built into the storage tank 34.

[0043] Next, it is determined whether the amount of gas stored in the storage tank 34 has reached the permitted injection amount (step S45). If it has, "Injection permitted" is recorded in the gas storage information recording unit 36 ​​(step S46). Then, in both the case of YES and NO in step S45, it is determined whether the amount of gas stored has exceeded the limit (step S47). If it has exceeded the limit, "Storage limit" is recorded in the gas storage information recording unit 36 ​​(step S48), and the control flow of the generated hydrogen gas storage unit 30 is terminated. The control flow of the generated hydrogen gas storage unit is also terminated if it has not exceeded the limit.

[0044] In the generated hydrogen gas storage unit 30, if the gas storage information recording unit 36 ​​has a record of "injection permission" and / or a record of "storage limit", the following control flow for the generated hydrogen gas supply and combustion unit 40 is executed.

[0045] Figure 5 shows the control flow of the generated hydrogen gas supply and combustion unit 40. To start the engine, the ignition is turned ON (step S51). Next, it is determined whether the pressure loss of the gasoline particulate filter 46 is above a threshold (step S52). The pressure loss increases when the gasoline particulate filter 46 becomes clogged. The clogging state of the gasoline particulate filter 46 is determined by a clogging determination process, which determines that the filter is clogged when the pressure loss is above a predetermined value (threshold) based on the pressure loss data of the gasoline particulate filter 46. The pressure loss of the gasoline particulate filter 46 is usually measurable, and for example, the clogging determination process is performed by the control unit.

[0046] If the pressure loss in the gasoline particulate filter 46 is above a threshold, it is determined whether or not there is a record of "injection permission" in the gas storage information recording unit 36 ​​(step S53). If there is a record of "injection permission," the stored hydrogen gas is injected into the gasoline particulate filter 46 (step S54) and burned together with the exhaust gas. This combustion can be carried out, for example, as follows: The temperature of the exhaust gas emitted from the hybrid vehicle is raised, and when the raised exhaust gas is introduced into the gasoline particulate filter 46, the temperature of the exhaust gas is further raised by the catalyst in the gasoline particulate filter 46, and when hydrogen gas is injected in this state, the hydrogen gas burns together with the exhaust gas. At this time, the temperature inside the gasoline particulate filter 46 is 600°C to 900°C.

[0047] Subsequently, the gas storage information recording unit 36 ​​records "no storage" (step S55), and the control flow of the generated hydrogen gas supply and combustion unit 40 is terminated.

[0048] If the pressure loss of the gasoline particulate filter 46 is not above a threshold (step S52, NO), it is determined whether there is a record of "storage limit" in the waste storage information recording unit 36 ​​(step S56). If there is no record, the control flow of the generated hydrogen gas supply and combustion unit 40 is terminated. If there is a record of "storage limit" (step S56, YES), the stored hydrogen gas is injected into the gasoline particulate filter 46 (step S54) and burned together with the exhaust gas. Then, the gas storage information recording unit 36 ​​is recorded as "no storage" (step S55), and the control flow of the generated hydrogen gas supply unit 40 is terminated. If there is no record of "storage limit" in the waste storage information recording unit 36 ​​(step S56, NO), the control flow of the generated hydrogen gas supply unit 40 is also terminated.

[0049] According to the present invention's method and system for utilizing hydrogen gas generated by lithium-ion batteries, hydrogen gas containing components harmful to the human body, generated in each of the lithium-ion battery cells 14-1 to 14-4, is burned together with the exhaust gas of the hybrid vehicle within the gasoline particulate filter 46. Therefore, the emission of hydrogen gas to the outside is reduced and prevented. Furthermore, the combustion of exhaust gas together with hydrogen gas also contributes to preventing clogging of the gasoline particulate filter 46. This reduces the problem of adverse impacts on the natural environment and promotes the use of lithium-ion batteries in hybrid vehicles.

[0050] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. For example, although the on / off valves provided for each cell are connected by a single exhaust duct 20, an exhaust duct may be provided for each cell. Also, although the operation information acquisition unit 22, calculation and estimation unit 24, cell information recording unit 26, tank information recording unit 36, etc. are described separately from the control unit 48, for example, all of them may be housed within the control unit 48. [Explanation of symbols]

[0051] 10. Lithium-ion battery hydrogen gas utilization system 12. Hydrogen Gas Generation Unit 14 Lithium-ion batteries Cells 14-1 to 14-4 16-1~16-4 Shut-off valves 18-1~18-4 Outlet 20 Exhaust duct 22 Operation Information Acquisition Unit 24 Calculation and Estimation Unit 26 Cell Information Recording Unit 28 connecting pipes 30 Hydrogen Gas Storage Unit 32 Intake system 34 Storage Tanks 36 Tank Information Recording Unit 40. Hydrogen gas supply and combustion section 42 connecting pipes 44 Hydrogen gas injection device 46. ​​Gasoline Particulate Filter 48 Control Unit 50 Exhaust gas pipe

Claims

1. A hydrogen gas supply process for sending hydrogen gas generated in each cell constituting the lithium-ion battery to the gasoline particulate filter side while a hybrid vehicle equipped with a lithium-ion battery is in operation, The hydrogen gas supplied is injected into the gasoline particulate filter and burned together with the exhaust gas of the hybrid vehicle in a hydrogen gas supply and combustion process, It has, The generated hydrogen gas supply process includes a generated hydrogen gas storage operation in which the hydrogen gas generated in each cell is drawn in and stored in a predetermined location. In the hydrogen gas storage operation, intake is performed for each cell when the amount of hydrogen gas generated in each cell exceeds a predetermined value. A method for utilizing hydrogen gas generated by a lithium-ion battery, characterized in that the injection supply of hydrogen gas in the generated hydrogen gas supply step is performed by supplying the stored hydrogen gas.

2. The determination of the amount of hydrogen gas generated in each of the aforementioned cells is as follows: Operation information acquisition operation, which acquires operational information including the current value, voltage value, and temperature value of each cell while the vehicle is running, A method for utilizing hydrogen gas generated by a lithium-ion battery according to claim 1, characterized in that it is performed based on a calculation and estimation operation of the amount of hydrogen gas generated in each cell, which is performed based on the aforementioned operating information.

3. The clogged state of the gasoline particulate filter is determined based on the pressure loss data of the gasoline particulate filter, and the clogged state is determined when the pressure loss is greater than or equal to a predetermined value. The aforementioned hydrogen gas supply and combustion process is performed as follows: A method for utilizing hydrogen gas generated by a lithium-ion battery according to claim 1 or 2, characterized in that it is performed when it is determined that the aforementioned clogging condition has occurred.

4. A lithium-ion battery generated hydrogen gas utilization system for carrying out the lithium-ion battery generated hydrogen gas utilization method described in any one of claims 1 to 3, An operation information acquisition unit acquires operation information including the current value, voltage value, and temperature value of each cell of the lithium-ion battery while the vehicle is running. A unit for calculating and estimating the amount of hydrogen gas generated in each cell based on the aforementioned operating information, A hydrogen gas storage unit that takes in hydrogen gas generated in each of the aforementioned cells and stores it in a predetermined location, The generated hydrogen gas supply and combustion unit includes an injection means for injecting the stored hydrogen gas into the gasoline particulate filter, and burns the hydrogen gas together with the exhaust gas of the hybrid vehicle by the injection supply, In each of the aforementioned cells, when the amount of hydrogen gas generated calculated by the calculation and estimation unit exceeds a predetermined value, a control unit is provided to inject and supply the hydrogen gas from the generated hydrogen gas storage unit into the gasoline particulate filter, It is characterized by having the following features.

5. A hydrogen gas supply process for sending hydrogen gas generated in each cell constituting the lithium-ion battery to the gasoline particulate filter side while a hybrid vehicle equipped with a lithium-ion battery is in operation, The hydrogen gas supplied is injected into the gasoline particulate filter and burned together with the exhaust gas of the hybrid vehicle in a hydrogen gas supply and combustion process, It has, The hydrogen gas supply process includes a hydrogen gas storage operation in which the hydrogen gas generated in each cell is stored in a storage tank. A method for utilizing hydrogen gas generated by a lithium-ion battery, characterized in that, in the hydrogen gas supply and combustion process described above, when the amount of hydrogen gas stored in the storage tank exceeds a preset injection permit amount, the stored hydrogen gas is injected into the gasoline particulate filter.

6. A hydrogen gas supply process for sending hydrogen gas generated in each cell constituting the lithium-ion battery to the gasoline particulate filter side while a hybrid vehicle equipped with a lithium-ion battery is in operation, The hydrogen gas supplied is injected into the gasoline particulate filter and burned together with the exhaust gas of the hybrid vehicle in a hydrogen gas supply and combustion process, It has, Each of the aforementioned cells is provided with an on / off valve. The hydrogen gas supply process includes a hydrogen gas storage operation in which, while the hybrid vehicle is stopped, the on / off valve is opened from a closed state to an open state, and the hydrogen gas generated in the cell is drawn in and stored in a storage tank. A method for utilizing hydrogen gas generated by a lithium-ion battery, characterized in that, in the hydrogen gas supply and combustion process described above, hydrogen gas stored in the storage tank is injected into the gasoline particulate filter at a predetermined timing.

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