Lithium battery failure produced gas collecting device

Abstract

The utility model discloses a lithium battery failure produced gas collecting device which comprises a stainless steel main body pipeline, a remote controller, a temperature sensor, a voltage sensor, a filter, a pressure reducing valve, an electromagnetic valve, a flow meter, an absorption bottle, a one-way valve, a manual valve and a failure battery tank, the invalid battery tank is connected with an inlet of the absorption bottle through a stainless steel main body pipeline, a filter, a pressure reducing valve, an electromagnetic valve and a flowmeter in sequence and a group of electromagnetic valves; an outlet of the absorption bottle is connected to an exhaust port through a one-way valve; a to-be-failed lithium battery is stored in the failed battery tank, and the temperature sensor and the voltage sensor are arranged on the surface of the to-be-failed lithium battery and the positive and negative electrodes respectively and connected to the remote controller through wires respectively. And the invalid battery tank is connected to the air bag collecting opening through the manual valve. Collection and component analysis of gas generated in the whole failure process of the lithium battery in the failure battery tank are remotely controlled, and the condensation phenomenon caused by remote transmission of the gas generated by the failure of the lithium battery through a pipeline is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion battery research and development safety performance, in particular to a device for collecting gas produced by failed lithium batteries. Background Art

[0002] Lithium-ion batteries (hereinafter referred to as lithium batteries) offer numerous advantages, including high energy density, high output power, long charge and discharge life, zero pollution, a wide operating temperature range, and low self-discharge. As a new type of high-energy chemical power source, lithium-ion batteries have been widely used in mobile phones, computers, electric vehicles, energy storage, and other fields in recent years. They offer advantages such as long battery life, long service life, low self-discharge rate, and environmental friendliness.

[0003] By combing through the internal chemical reactions of lithium batteries, it was found that lithium batteries will release a variety of gases during the heating process. Different gases are the inevitable products of different chemical reactions. Early warning diagnosis of thermal runaway of lithium batteries is an important prerequisite for ensuring the reliable operation of lithium batteries. The released gases can be used as characteristic quantities for early warning diagnosis of thermal runaway of lithium batteries; analysis of the gas composition produced by lithium batteries during the failure process can provide key data support for industrial production, environmental protection, medical health and other fields.

[0004] Currently, the collection and analysis of gases produced during lithium battery failure must be performed manually at the site of the failed battery tank. If the high-temperature gases produced by lithium battery failure are transported over long distances through pipelines, condensation may occur due to the long transmission distance, making it difficult to fully analyze the components. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a device for collecting gas produced by failed lithium batteries.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is a device for collecting gas generated by a failed lithium battery, comprising a stainless steel main pipeline, a remote controller, a temperature sensor, a voltage sensor, a filter, a pressure reducing valve, a solenoid valve, a flow meter, an absorption bottle, a one-way valve, a manual valve and a failed battery tank;

[0007] The failed battery tank passes through a stainless steel main pipeline in sequence through a filter, a pressure reducing valve, a solenoid valve, a flow meter, and is connected to the inlet of the absorption bottle through a set of solenoid valves. The outlet of the absorption bottle is connected to the exhaust port through a one-way valve.

[0008] The failed battery tank stores the lithium batteries to be failed. The temperature sensor and voltage sensor are respectively arranged on the surface and positive and negative electrodes of the lithium batteries to be failed and are connected to the remote controller through wires. The failed battery tank is connected to the air bag collection port through a manual valve.

[0009] Preferably, the absorption bottle contains a solvent, which is used to absorb the gas generated by the failure of the lithium battery. The absorbed solution is used for instrument component analysis, and the gas solutes that cannot be absorbed by the solvent are discharged into the waste treatment system through the exhaust port.

[0010] As a further preference, the remote controller has the function of collecting voltage data and temperature data of the lithium battery; the remote controller collects the voltage data and temperature data of the lithium battery in real time through the voltage sensor and the temperature sensor.

[0011] More preferably, the remote controller sets the opening and closing time of the solenoid valve according to the voltage data and temperature data of the lithium battery before failure, and remotely controls the opening and closing of the solenoid valve.

[0012] Still more preferably, the absorption bottle is a group of absorption bottles; a group of absorption bottles is composed of more than one absorption bottle;

[0013] The outlet of the first absorption bottle and the inlet of the last absorption bottle in a group of absorption bottles are connected in series, the inlet of the first absorption bottle in the group of absorption bottles is the inlet end of the group of absorption bottles, and the outlet of the last absorption bottle is the outlet end of the group of absorption bottles;

[0014] The failed battery can passes through a stainless steel main pipeline in sequence through a filter, a pressure reducing valve, a solenoid valve, a flow meter and is connected to the inlet end of a group of absorption bottles through a group of solenoid valves. The outlet end of a group of absorption bottles is connected to the exhaust port through a one-way valve.

[0015] More preferably, the absorption bottles are multiple groups of absorption bottles; multiple groups of absorption bottles are composed of more than one group of absorption bottles connected in parallel, that is, the inlets of the absorption bottles of each group are connected to each other through a group of solenoid valves to form the inlet end, and the outlets of the absorption bottles of each group are connected to each other through a one-way valve to form the outlet end;

[0016] The failed battery tank is connected to the inlet end of multiple groups of absorption bottles through a stainless steel main pipeline in sequence through a filter, a pressure reducing valve, a solenoid valve, a flow meter, and the outlet end of the multiple groups of absorption bottles is connected to the exhaust port.

[0017] The beneficial effects of the utility model are:

[0018] By remotely monitoring the voltage and surface temperature of the lithium battery, different solenoid valve groups are driven on and off in time to collect the gas components generated at different times in real time, and the mixed solutions at different times are obtained for analysis by the instrument. This realizes the remote control of the collection and component analysis of the gas generated by the entire failure process of the lithium battery in the failed battery tank, avoiding the condensation of the gas generated by the remote transmission of the failed lithium battery through the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0020] Figure 1 The utility model is a structural schematic diagram of an embodiment of a device for collecting gas generated by a failed lithium battery.

[0021] Markings in the figure: 1-stainless steel main pipeline, 2-remote controller, 3-temperature sensor, 4-voltage sensor, 5-filter, 6-pressure reducing valve, 7-solenoid valve, 8-flow meter, 9-absorption bottle, 10-check valve, 11-manual valve, 12-failed battery tank. DETAILED DESCRIPTION

[0022] Figure 1 This device is a gas collection device for failed lithium batteries. The device consists of a stainless steel main pipe 1, a remote controller 2, a temperature sensor 3, a voltage sensor 4, a filter 5, a pressure reducing valve 6, a solenoid valve 7, a flow meter 8, an absorption bottle 9, a one-way valve 10, a manual valve 11, and a failed battery tank 12.

[0023] All the above instruments and valves are interconnected through the main stainless steel pipeline to form a lithium battery failure gas collection device.

[0024] The failed battery tank is connected to the absorption bottle through a stainless steel main pipeline in sequence through a filter, a pressure reducing valve, a solenoid valve, a flow meter, and then connected to the exhaust port through a one-way valve.

[0025] For a single absorption bottle, the inlet of the absorption bottle is connected to the flow meter through a set of solenoid valves, and the outlet of the absorption bottle is connected to the exhaust port.

[0026] For more than one absorption bottle, the outlet of the preceding absorption bottle is connected to the inlet of the following absorption bottle in series to form a group of absorption bottles. The inlet of the preceding absorption bottle is the inlet end of the group of absorption bottles, and the outlet of the following absorption bottle is the outlet end of the group of absorption bottles.

[0027] The inlet ends of a group of absorption bottles are connected to the flow meter in the pipeline of the above-mentioned collection device through a group of electromagnetic valves, and the outlet ends of a group of absorption bottles are connected to the exhaust port through a one-way valve.

[0028] For more than one set of absorption bottles, the sets are connected in parallel to form multiple sets of absorption bottles. The inlets of the absorption bottles of each set are connected to each other through a set of solenoid valves to form the inlet ends of the multiple sets of absorption bottles, and the outlets of the absorption bottles of each set are connected to each other through a one-way valve to form the outlet ends of the multiple sets of absorption bottles. In other words, the multiple sets of absorption bottles are connected to each other in parallel.

[0029] The inlet ends of the multiple groups of absorption bottles connected in parallel are connected to the flow meter in the pipeline of the above-mentioned collection device, and the outlet ends of the multiple groups of absorption bottles are connected to the exhaust port.

[0030] exist Figure 1 The figure shows the connection of three groups of absorption bottles. Each group consists of three absorption bottles connected in series. The inlets of each group are connected to each other via a set of solenoid valves, and the outlets of each group are connected to each other via a one-way valve. Therefore, it can be seen that the three groups of absorption bottles are connected in parallel.

[0031] For the lithium batteries to be failed stored in the failed battery tank, a temperature sensor is arranged on the surface of the lithium batteries to be failed, a voltage sensor is arranged on the positive and negative electrodes of the lithium batteries to be failed, and the temperature sensor and the voltage sensor are respectively connected to the remote controller through wires.

[0032] The dead battery canister is also connected to the air bag collection port via a manual valve.

[0033] Directions:

[0034] Using the above-mentioned lithium battery failure gas collection device, collect the lithium battery failure gas according to the following steps:

[0035] Step a: using the above-mentioned lithium battery failure gas collection device to connect the absorption bottles of each assembly with the solvent;

[0036] Step b: Setting the temperature and voltage thresholds for determining when the lithium battery is about to fail in the remote controller;

[0037] Step c: pre-set the flow meter value;

[0038] Step d: Set and edit the opening conditions and opening time of each group of solenoid valves on the remote controller;

[0039] Step e: Collect the gases produced from the entire lithium battery failure process and discharge them into each absorption bottle from the beginning to the end, and mark the amount of gas that passes through each group of solvents for later detection and analysis;

[0040] Step f: The gaseous solutes that are not fully absorbed by the solvent are discharged into a waste treatment system through the exhaust port.

[0041] In the above-mentioned lithium battery failure gas collection device, the functions of each component are as follows:

[0042] 1) Voltage sensor and temperature sensor: Voltage sensors and temperature sensors are pre-placed on the planned failure lithium batteries and connected to the remote controller via wires, so as to collect the voltage and temperature data of the lithium batteries in real time.

[0043] 2) Solenoid valve: The opening time and opening sequence of the solenoid valve can be remotely controlled.

[0044] 3) Absorption bottle: It stores the solvent used to absorb the gas generated by the failed lithium battery. After the lithium battery fails, the solenoid valve can be opened by remote control to allow the gas generated by the lithium battery to pass through each absorption bottle one by one. The absorbed solution is used for instrument component analysis. Finally, the gas solute that cannot be fully absorbed by the solvent is discharged into the waste treatment system through the exhaust port.

[0045] 4) Remote Controller: Capable of collecting lithium battery voltage and temperature data. This data can be used to determine the opening time of the solenoid valves and programmatically set the opening, holding, and closing conditions for each valve group.

[0046] The remote controller can also be operated manually to open the main electromagnetic valve 7, and the opening, holding and closing time of each group of electromagnetic valves can be set step by step.

[0047] Below Figure 1 Taking the 1-3 groups of solenoid valves as an example, we will further explain how to set the opening, holding, and closing time of each group of solenoid valves:

[0048] 1. Set one solenoid valve to open at time point A, keep it open until time point B, then close the other solenoid valve, and the absorption of one absorption bottle is completed;

[0049] 2. After the arrival of period B, the two sets of solenoid valves are opened and kept open until the end of period C, and then the two sets of solenoid valves are closed, and the absorption of the two absorption bottles is completed;

[0050] 3. When the C period is reached, the three groups of solenoid valves are opened and kept open until the D period, and then the three groups of solenoid valves are closed, and the absorption of the three groups of absorption bottles is completed.

[0051] In actual operation, the opening and closing time and sequence of 1-3 groups of solenoid valves can be set in any combination.

[0052] The flow rate value can be input into the flow meter to automatically calculate the volume of gas entering the absorption bottle. Assume: the flow rate of the flow meter is 60L / H, and the solenoid valve is open and kept open for a period of time B hours, then the volume of gas entering the absorption bottle (L) = 60 × B.

[0053] This embodiment can remotely collect the voltage and temperature data of the lithium battery, promptly drive different solenoid valve groups to be on and off, and collect in real time the gas generated by the lithium battery stored in the battery failure tank during the entire failure process, thereby obtaining a mixed sample of the gas generated at each stage of the lithium battery failure process dissolved in a solvent, avoiding the condensation phenomenon caused by long-distance transmission of the high-temperature gas generated by the failure of the lithium battery through a pipeline, which makes it difficult to analyze the various components in the failure gas.

[0054] The above-described embodiments of the present invention do not limit the scope of protection of the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A device for collecting gas generated by a failed lithium battery, characterized by: Includes stainless steel main pipe, remote controller, temperature sensor, voltage sensor, filter, pressure reducing valve, solenoid valve, flow meter, absorption bottle, one-way valve, manual valve and dead battery tank; The dead battery can is connected to the inlet of the absorption bottle through a stainless steel main pipeline, a filter, a pressure reducing valve, a solenoid valve, a flow meter, and a set of solenoid valves. The outlet of the absorption bottle is connected to the exhaust port through a one-way valve. The failed battery tank stores the lithium batteries to be failed, and the temperature sensor and voltage sensor are respectively arranged on the surface and positive and negative electrodes of the lithium batteries to be failed and are respectively connected to the remote controller through wires; The failed battery can is connected to the air bag collection port through a manual valve.

2. The device for collecting gas generated by a failed lithium battery according to claim 1, wherein: The absorption bottle contains a solvent, which is used to absorb the gas generated by the failure of the lithium battery. The absorbed solution is used for instrument component analysis, and the gas solutes that cannot be absorbed by the solvent are discharged into the waste treatment system through the exhaust port.

3. The device for collecting gas generated by a failed lithium battery according to claim 2, wherein: The remote controller has the function of collecting voltage data and temperature data of the lithium battery; the remote controller collects the voltage data and temperature data of the lithium battery in real time through the voltage sensor and the temperature sensor.

4. The device for collecting gas generated by a failed lithium battery according to claim 3, wherein: The remote controller sets the opening and closing time of the solenoid valve according to the voltage data and temperature data of the lithium battery before failure, and remotely controls the opening and closing of the solenoid valve.

5. The device for collecting gas generated by a failed lithium battery according to claim 4, characterized in that: The absorption bottle is a group of absorption bottles, and the group of absorption bottles consists of more than one absorption bottle; The outlet of the first absorption bottle and the inlet of the last absorption bottle in the group of absorption bottles are connected in series, the inlet of the first absorption bottle in the group of absorption bottles is the inlet end of the group of absorption bottles, and the outlet of the last absorption bottle is the outlet end of the group of absorption bottles; The failed battery can is connected to the inlet end of a group of absorption bottles through a stainless steel main pipeline, through a filter, a pressure reducing valve, a solenoid valve, and a flow meter in sequence, and through a group of solenoid valves. The outlet end of the group of absorption bottles is connected to the exhaust port through a one-way valve.

6. The device for collecting gas generated by a failed lithium battery according to claim 5, characterized in that: The absorption bottles are multiple groups of absorption bottles; the multiple groups of absorption bottles are composed of more than one group of absorption bottles connected in parallel, that is, the inlets of the absorption bottles of each group are connected to each other through a group of solenoid valves to form the inlet end, and the outlets of the absorption bottles of each group are connected to each other through a one-way valve to form the outlet end; The failed battery can is connected to the inlet end of multiple groups of absorption bottles through a stainless steel main pipeline in sequence through a filter, a pressure reducing valve, a solenoid valve, and a flow meter. The outlet end of the multiple groups of absorption bottles is connected to the exhaust port.

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