Battery gas collecting system and electric equipment with same

Abstract

The utility model discloses a battery gas collecting system and electric equipment with the battery gas collecting system, the battery gas collecting system comprises a battery pack, a gas collector, a gas reactor and a liquid collector, the battery pack is provided with a vent hole used for discharging carbon compound-containing gas generated by the battery pack; the gas collector is communicated with the exhaust hole; the gas reactor is communicated with the gas collector, a catalytic material is arranged in the gas reactor, gas in the gas collector can be catalyzed into liquid fuel by the catalytic material after entering the gas reactor, and the gas reactor is provided with a liquid outlet; the liquid collector is communicated with the liquid outlet so as to collect liquid fuel. According to the battery gas collection system disclosed by the embodiment of the utility model, the gas collector and the gas reactor are arranged, so that the gas generated by the battery pack can be well collected, and the collected gas is reacted to obtain the fuel liquid, so that the gas can be prevented from being discharged into the environment to pollute the environment; and reutilization of resources can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic batteries, in particular to a battery gas collection system and an electrical device having the same. Background Art

[0002] Lithium-ion batteries are widely used in electric vehicles due to their high energy density, high power density and long cycle life. However, during the battery cycle, chemical reactions will occur inside the lithium-ion battery to generate gas, such as the decomposition of the solid electrolyte interface film, the reaction between the negative electrode active material and the electrolyte, the reaction between the negative electrode active material and the binder, the oxidation decomposition reaction of the electrolyte, etc., which will cause the internal pressure of the battery to increase, which is manifested as expansion force between the cells. In addition, due to the heat release during the above chemical reaction, the generated gas is in a high temperature state, which is easy to cause thermal runaway. On the other hand, if the gas is discharged directly, it will aggravate environmental pollution. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery gas collection system, which can effectively reduce the internal pressure of the battery, protect the environment and realize the recycling of resources.

[0004] According to an embodiment of the utility model, a battery gas collection system includes: a battery pack, the battery pack having an exhaust hole for discharging the gas containing carbon compounds generated by the battery pack; a gas collector, the gas collector being connected to the exhaust hole; a gas reactor, the gas reactor being connected to the gas collector, a catalytic material being arranged in the gas reactor, the gas in the gas collector being able to be catalyzed into liquid fuel by the catalytic material after entering the gas reactor, the gas reactor having a liquid discharge port; a liquid collector, the liquid collector being connected to the liquid discharge port to collect the liquid fuel.

[0005] According to the battery gas collection system of the embodiment of the utility model, the gas generated by the battery pack can be better collected by setting a gas collector and a gas reactor, and the collected gas is reacted to obtain fuel liquid, which can not only avoid the gas being discharged into the environment to pollute the environment, but also realize the recycling of resources.

[0006] In addition, the battery gas collection system according to the utility model may also have the following additional technical features:

[0007] In some embodiments of the utility model, the gas reactor has an air inlet, and the gas collector is connected to the gas reactor through the air inlet, and the battery gas collection system also includes: a first valve; a first gas sensor, the first gas sensor is used to obtain the content of the gas of carbon-containing compounds in the gas reactor; a first controller, the first controller is used to control the first valve to open or disconnect the connection state between the gas collector and the gas reactor according to the content of the gas of carbon-containing compounds in the gas reactor.

[0008] In some embodiments of the present invention, the first gas sensor is disposed in the air inlet.

[0009] In some embodiments of the utility model, the battery gas collection system also includes: a second valve; a second gas sensor, the second gas sensor is used to obtain the content of the gas of the carbon-containing compounds in the battery pack; and a second controller, the second controller is used to control the second valve to open or disconnect the connection between the battery pack and the gas collector according to the content of the gas of the carbon-containing compounds in the battery pack.

[0010] In some embodiments of the present invention, the second gas sensor is disposed in the exhaust hole.

[0011] In some embodiments of the present invention, the battery gas collection system further includes an exhaust pipe, one end of the exhaust pipe is connected to the exhaust hole, and the other end of the exhaust pipe is connected to the gas collector, and the second valve is integrated in the exhaust pipe.

[0012] In some embodiments of the present invention, the battery pack includes a plurality of battery cells, each of the battery cells has the exhaust hole, a plurality of exhaust pipes are provided, and the plurality of exhaust pipes are respectively connected to the exhaust holes of the plurality of battery cells.

[0013] In some embodiments of the present invention, the second valve is a one-way valve that allows the battery pack to conduct one-way toward the gas collector.

[0014] In some embodiments of the utility model, the battery pack includes: a battery cover and a positive electrode column, a negative electrode column and an explosion-proof valve arranged on the battery cover; the exhaust hole is arranged on the battery cover and is located between the positive electrode column and the explosion-proof valve, and / or is located between the negative electrode column and the explosion-proof valve; a waterproof and breathable membrane is arranged in the exhaust hole.

[0015] The utility model also provides an electrical device having the battery collection system of the above embodiment.

[0016] According to the electrical equipment of the utility model, by providing the battery collection system of the above embodiment, the gas discharged from the battery can be better collected, and the collected gas can be recycled, which can avoid pollution to the environment and improve the utilization rate of energy.

[0017] Alternatively, the electrical device may be a car, whereby the collected gas may be supplied to the vehicle as power after being converted into liquid fuel by a gas generator.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a schematic diagram of the structural principle of a battery gas collection system according to an embodiment of the utility model.

[0021] Figure 2 It is a schematic structural diagram of a battery pack, a gas collector and an exhaust pipe of a battery gas collection system according to an embodiment of the utility model.

[0022] Figure 3 It is a schematic structural diagram of a battery unit of a battery gas collection system according to an embodiment of the utility model.

[0023] Figure 4 It is a structural schematic diagram of a gas collector of a battery gas collection system according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] Battery gas collection system 100,

[0026] Battery pack 1, battery cover 11, battery unit 10, positive pole 101, negative pole 102, explosion-proof valve 103,

[0027] Gas collector 2, gas reactor 3, exhaust pipe 4. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] Reference below Figure 1-Figure 4 A battery gas collection system 100 according to an embodiment of the present invention is described.

[0032] like Figure 1-Figure 4 As shown, the battery gas collection system 100 according to the embodiment of the utility model includes a battery pack 1, a gas collector 2 and a gas reactor 3. The battery pack 1 has an exhaust hole, and the exhaust hole is used to discharge the gas containing carbon compounds generated by the battery pack 1. Here, taking the lithium-ion battery as an example, during the cycle of the lithium-ion battery, chemical reactions will occur inside the lithium-ion battery to generate gas, such as the decomposition of the solid electrolyte interface film, the reaction of the negative electrode active material and the electrolyte, the reaction of the negative electrode active material and the binder, the oxidation decomposition reaction of the electrolyte, etc. The gas in the battery pack 1 is mainly H2, CO, CO2 and other carbon-containing compounds. After the gas is generated, it is easy to cause the internal pressure of the battery to increase, which is manifested as the expansion force between the battery cells. In addition, due to the heat release in the above chemical reaction process, the generated gas is in a high temperature state, which is easy to cause thermal runaway. In this application, by making the battery pack 1 have an exhaust hole, the generated gas can be discharged from the battery pack 1, thereby avoiding the above problems.

[0033] It should be noted here that the decomposition of the above-mentioned solid electrolyte interface membrane, the reaction between the negative electrode active material and the electrolyte, the reaction between the negative electrode active material and the binder, the oxidation decomposition reaction of the electrolyte, etc. are all normal cycle processes of lithium-ion batteries, which are essentially different from the fire and explosion of lithium-ion batteries, which require the explosion-proof valve 103 to be opened for exhaust. Among the two, exhaust through the exhaust hole is the normal working state of the lithium-ion battery.

[0034] Furthermore, since the gas is mainly H2, CO, CO2 and other carbon-containing compounds, if the gas is discharged directly, it will easily aggravate environmental pollution. Therefore, the present application also provides a gas collector 2, a gas reactor 3 and a liquid collector. Specifically, the gas collector 2 is connected to the exhaust hole, the gas reactor 3 is connected to the gas collector 2, and a catalytic material is provided in the gas reactor 3. After the gas in the gas collector 2 enters the gas reactor 3, it can be catalyzed into liquid fuel by the catalytic material. The gas reactor 3 has a drain port, and the liquid collector is connected to the drain port to collect the liquid fuel.

[0035] That is to say, when the gas containing carbon compounds is generated in the battery pack 1, it can enter the gas collector 2 through the exhaust hole, and the gas in the gas collector 2 can enter the gas reactor 3 for reaction, so that the gas containing carbon compounds is converted into fuel liquid, and the fuel can also be discharged into the liquid collector for collection, thereby realizing resource recycling. The collected liquid fuel can be used in vehicles or other equipment, without limitation here.

[0036] Please refer to the following Figure 1-Figure 4 Describe the chemical reaction process in the gas reactor 3:

[0037] The battery pack 1 continuously generates high-temperature gas during operation, and the gas is collected in the gas collector 2. As the battery pack 1 continues to generate gas, the gas in the gas collector 2 will flow toward the gas reactor 3. When the gas flows into the gas reactor 3, due to the high-temperature characteristics of the gas and the continuous generation of the gas, when the reaction environment in the gas reactor 3 is a high-temperature and high-pressure environment, a catalytic reaction can be performed by the catalyst material. Specifically, the gas in the battery pack 1 is mainly H2, CO, CO2 and other carbon-containing compounds. Through specific catalyst materials, such as metal oxides, metal alloys, two-dimensional materials and corresponding modified materials, such as using a two-dimensional material as a substrate, anchoring a single or multiple metal atoms thereon to form a new material structure, at this time, the metal atoms, the substrate and the multiple reaction sites combined in the structure can cause the gas in the battery pack 1 to undergo multiple catalytic reactions to generate liquid fuel C x H y O zAt the same time, since the gas in the battery pack 1 is at a high temperature and the reactor space is small, it is easy to form a high-pressure condition after the gas enters, thereby providing energy for the catalytic reaction. Therefore, the gas in the battery pack 1 will more easily undergo a physical and chemical conversion reaction under the action of the catalytic material. The following is the overall chemical reaction equation:

[0038]

[0039] The above reaction is converted into a specific liquid fuel under specific conditions, such as controlling temperature and pressure. A drain port is added to the reactor port so that the generated liquid can be discharged through the drain port and can be used continuously. In a hybrid vehicle, the liquid generated while the battery pack 1 is working can be used as a supplementary fuel to enable the motor to drive the vehicle.

[0040] Therefore, according to the battery gas collection system 100 of the embodiment of the utility model, the gas generated by the battery pack 1 can be better collected by setting the gas collector 2 and the gas reactor 3, and the collected gas can be reacted to obtain fuel liquid, which can not only avoid the gas being discharged into the environment to pollute the environment, but also realize the recycling of resources.

[0041] In some embodiments of the utility model, the gas reactor 3 has an air inlet, and the gas collector 2 is connected to the gas reactor 3 through the air inlet. The battery gas collection system 100 also includes a first valve, a first gas sensor and a first controller. The first gas sensor is used to obtain the content of the carbon-containing compound gas in the gas reactor 3, and the first controller is used to control the first valve to open or disconnect the connection state between the gas collector 2 and the gas reactor 3 according to the content of the carbon-containing compound gas in the gas reactor 3.

[0042] That is to say, in order to ensure the efficiency within the gas reactor 3, it is necessary to make the content of the carbon-containing compound gas within the gas reactor 3 within a certain standard. Therefore, the present application obtains the content of the carbon-containing compound gas within the gas reactor 3 by setting a first gas sensor. When the content of the carbon-containing compound gas within the gas reactor 3 reaches the set standard, the first controller can notify the first valve to close the air inlet. When the content of the carbon-containing compound gas within the gas reactor 3 is reduced to a certain standard, the first controller can open the first valve again, and repeat this process in sequence until the carbon-containing compound gas in the gas collector 2 is fully utilized.

[0043] In one example, the first gas sensor may be a SnO2 semiconductor sensor for gas monitoring of thermal runaway of lithium batteries. The sensor is mainly sensitive to CH4, C3H8, and CO, and has advantages such as fast detection speed.

[0044] In one example, the first gas sensor may be disposed in the gas inlet; in one example, the first gas sensor may be disposed in the gas reactor 3 .

[0045] In some embodiments of the utility model, the battery gas collection system 100 also includes a second valve, a second gas sensor and a second controller. The second gas sensor is used to obtain the content of the carbon-containing compound gas in the battery pack 1. The second controller is used to control the second valve to open or disconnect the connection state between the battery pack 1 and the gas collector 2 according to the content of the carbon-containing compound gas in the battery pack 1.

[0046] That is to say, when gas containing carbon compounds is generated in the battery pack 1 and the amount of the gas reaches a certain standard, the second gas sensor can send a signal, and then the second controller can control the second valve to open, so that the gas containing carbon compounds generated in the battery pack 1 can be discharged to the gas collector 2, thereby avoiding the increase of internal pressure of the battery pack 1, and also avoiding thermal runaway of the battery pack 1. As the gas is discharged, the internal pressure of the battery pack 1 gradually decreases. When the gas content is reduced to a certain standard, the second controller can control the second valve to close, thereby avoiding the gas in the gas collector 2 from flowing back into the battery pack 1.

[0047] In some examples, the second gas sensor is disposed within the exhaust vent.

[0048] In some examples, the second gas sensor is disposed within the battery pack 1 .

[0049] In some embodiments of the present invention, Figure 1-Figure 4 As shown, the battery gas collection system 100 also includes an exhaust pipe 4, one end of the exhaust pipe 4 is connected to the exhaust hole, and the other end is connected to the gas collector 2, and the second valve is integrated in the exhaust pipe 4. That is to say, by arranging the exhaust pipe 4 to be connected between the battery pack 1 and the gas collector 2, the assembly position between the battery pack 1 and the gas collector 2 can be arranged more flexibly. In addition, direct connection between the battery pack 1 and the gas collector 2 can be avoided, which causes damage to the battery pack 1 and the gas collector 2. Moreover, integrating the second valve in the exhaust pipe 4 can make better use of the space of the exhaust pipe 4.

[0050] Optionally, the exhaust pipe 4 may be a hose, so as to avoid stress concentration and rupture at the exhaust pipe 4, thereby preventing the exhaust pipe 4 from affecting the transfer and circulation of the gas.

[0051] Alternatively, if Figure 1-Figure 4As shown, the battery pack 1 includes a plurality of battery cells 10, each of which has an exhaust hole. A plurality of exhaust pipes 4 are provided, and the plurality of exhaust pipes 4 are respectively connected to the exhaust holes of the plurality of battery cells 10. That is to say, each battery cell 10 is independent of each other, and the gas generated by each battery cell 10 can be independently discharged into the gas collector 2, thereby avoiding interference between two battery cells 10.

[0052] Optionally, the second valve is a one-way valve that allows the battery pack 1 to conduct one-way toward the gas collector 2. Here, it can be understood that in the process of continuous gas generation by the battery pack 1, since the reaction rate of the gas reactor 3 is lower than the gas generation rate, there is a possibility that the gas pressure in the gas collector 2 will gradually increase. When the battery pack 1 is no longer working, at this time, there may be a situation where the gas pressure in the gas collector 2 is greater than the gas pressure in the battery pack 1. By setting a one-way valve, the gas in the gas collector 2 can be prevented from flowing back to the battery pack 1, thereby avoiding affecting the battery pack 1.

[0053] In some embodiments of the utility model, the battery pack 1 includes: a battery cover 11 and a positive electrode column 101, a negative electrode column 102 and an explosion-proof valve 103 arranged on the battery cover 11, a vent is arranged on the battery cover 11, and is located between the positive electrode column 101 and the explosion-proof valve 103, and / or, is located between the negative electrode column 102 and the explosion-proof valve 103, and a waterproof breathable membrane is arranged in the vent. In other words, the waterproof breathable membrane can prevent the electrolyte in the battery pack 1 from leaking out of the vent, and does not affect the gas passing through the waterproof breathable membrane. By arranging the vent on the battery cover 11, the processing cost can be reduced, and it is also conducive to the arrangement of the waterproof breathable membrane.

[0054] In one example, if Figure 1-Figure 4 As shown, a vent hole may be provided on the battery cover plate 11 between the positive pole 101 and the explosion-proof valve 103. In another example, a vent hole 1 may be provided on the battery cover plate 11 between the positive pole 101 and the explosion-proof valve 103. In addition, the position of the vent hole may also be set according to actual needs, which is not limited here.

[0055] The present invention also provides an electrical device having the battery collection system 100 of the above embodiment.

[0056] According to the electrical equipment of the present invention, by providing the battery collection system 100 of the above embodiment, the gas discharged from the battery can be better collected and the collected gas can be recycled, thereby avoiding pollution to the environment and improving the utilization rate of energy.

[0057] Alternatively, the electrical device may be a car, whereby the collected gas may be supplied to the vehicle as power after being converted into liquid fuel by a gas generator.

[0058] Other structures and operations of the electric device and the battery collection system 100 according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0059] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery gas collection system, characterized in that: include: A battery pack, wherein the battery pack has an exhaust hole for discharging carbon compound-containing gas generated by the battery pack, the battery pack comprising: a battery cover plate and a positive electrode column, a negative electrode column and an explosion-proof valve arranged on the battery cover plate, and the exhaust hole is arranged on the battery cover plate; a gas collector, the gas collector being in communication with the exhaust hole; A gas reactor, the gas reactor is connected to the gas collector, a catalytic material is arranged in the gas reactor, the gas in the gas collector can be catalyzed into liquid fuel by the catalytic material after entering the gas reactor, and the gas reactor has a liquid discharge port; a liquid collector, the liquid collector being in communication with the liquid drain port to collect the liquid fuel, The battery gas collection system further comprises: The second valve is used to open or close the connection between the battery pack and the gas collector. The second valve is a one-way valve that allows the battery pack to be unidirectionally connected to the gas collector.

2. The battery gas collection system according to claim 1, characterized in that: The gas reactor has a gas inlet, and the gas collector is connected to the gas reactor through the gas inlet. The battery gas collection system also includes: First valve; a first gas sensor, the first gas sensor being used to obtain the content of the gas containing carbon compounds in the gas reactor; A first controller is used to control the first valve to open or close the connection state between the gas collector and the gas reactor according to the content of the gas containing carbon compounds in the gas reactor.

3. The battery gas collection system according to claim 2, characterized in that: The first gas sensor is disposed in the air inlet.

4. The battery gas collection system according to claim 1, characterized in that: Also includes: a second gas sensor, the second gas sensor being used to obtain the content of the gas containing carbon compounds in the battery pack; A second controller is used to control the second valve to open or disconnect the connection between the battery pack and the gas collector according to the content of the gas containing carbon compounds in the battery pack.

5. The battery gas collection system according to claim 4, characterized in that: The second gas sensor is disposed in the exhaust hole.

6. The battery gas collection system according to claim 4, characterized in that: It also includes an exhaust pipe, one end of which is connected to the exhaust hole, and the other end of which is connected to the gas collector, and the second valve is integrated in the exhaust pipe.

7. The battery gas collection system according to claim 6, characterized in that: The battery pack includes a plurality of battery cells, each of the battery cells has the exhaust hole, a plurality of exhaust pipes are provided, and the plurality of exhaust pipes are respectively connected to the exhaust holes of the plurality of battery cells.

8. The battery gas collection system according to claim 1, characterized in that: The exhaust hole is located between the positive pole and the explosion-proof valve, and / or the exhaust hole is located between the negative pole and the explosion-proof valve, and a waterproof and breathable membrane is arranged in the exhaust hole.

9. An electrical device, characterized in that: A battery gas collection system comprising the battery gas collection system according to any one of claims 1 to 8.

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