Battery pack, vehicle and battery pack monitoring method

Abstract

The invention provides a battery pack, a vehicle and a battery pack monitoring method, and relates to the technical field of vehicles, the battery pack comprises a shell and a hydrogen sulfide gas sensor; the shell is filled with composite gas, and the composite gas comprises inert gas and alkaline gas; a hydrogen sulfide remover is arranged at the bottom of the shell; and the hydrogen sulfide gas sensor is arranged in the shell. The shell is filled with the composite gas, the inert gas can isolate oxygen and water vapor, sulfide is prevented from making contact with the oxygen and the water vapor to generate hydrogen sulfide gas, the alkaline gas can generate a neutralization reaction with the hydrogen sulfide gas, the hydrogen sulfide remover can generate a neutralization reaction with the hydrogen sulfide gas, and generation of the hydrogen sulfide gas is reduced; the hydrogen sulfide gas is prevented from leaking out of the shell. The hydrogen sulfide gas sensor can detect that the concentration of hydrogen sulfide gas in the shell is greater than the threshold value in time, and sends an alarm signal to a user to prompt the user, so that hydrogen chloride gas leakage caused by untimely treatment is prevented, and the safety of the battery pack can be improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a battery pack, a vehicle, and a method for monitoring the battery pack. Background Technology

[0002] In sulfide-based all-solid-state batteries, sulfur-containing compounds can easily react with water vapor in the air that enters the casing, producing toxic gases such as hydrogen sulfide, which threatens the safety of personnel and the environment.

[0003] In the prior art, some battery packs are equipped with hydrogen sulfide gas adsorption structures to adsorb hydrogen sulfide in the battery pack.

[0004] The above method relies on physical adsorption, which has limited efficiency in removing hydrogen sulfide gas. Once the adsorption capacity of the hydrogen sulfide gas adsorption structure reaches saturation, the hydrogen sulfide gas in the battery pack cannot be adsorbed. If not handled in time, it will lead to hydrogen sulfide gas leakage, resulting in poor battery pack safety. Summary of the Invention

[0005] The purpose of this invention is to provide a battery pack to solve the technical problem of poor safety in existing battery packs.

[0006] The battery pack provided by the present invention includes a housing and a hydrogen sulfide gas sensor; The housing is filled with a composite gas, which includes an inert gas and an alkaline gas; a hydrogen sulfide removal agent is provided at the bottom of the housing. The hydrogen sulfide gas sensor is housed within the housing.

[0007] Furthermore, the hydrogen sulfide gas sensor is disposed at the bottom of the housing.

[0008] Furthermore, the battery pack also includes an all-solid-state battery and a base; The base is disposed inside the housing, the all-solid-state battery is disposed above the base, and the hydrogen sulfide removal agent is disposed below the base; the base is provided with vent holes.

[0009] Furthermore, the alkaline gas accounts for 1%-5% of the volume of the composite gas.

[0010] Furthermore, the inert gas is nitrogen, helium, or argon, and the alkaline gas is ammonia or amine.

[0011] Furthermore, the hydrogen sulfide removal agent includes a hydrogen sulfide gas adsorbent and / or an alkaline substance.

[0012] Furthermore, the hydrogen sulfide gas adsorbent is activated carbon, silica gel, zeolite, or metal oxide; The alkaline substance is sodium carbonate, lithium carbonate, magnesium carbonate, calcium carbonate, sodium hydroxide, manganese hydroxide, calcium oxide, or magnesium oxide.

[0013] Furthermore, the battery pack also includes a control module and a notification module; The hydrogen sulfide gas sensor and the notification module are respectively connected to the control module. When the hydrogen sulfide gas concentration detected by the hydrogen sulfide gas sensor is greater than the threshold, the control module controls the notification module to send a notification signal.

[0014] Another objective of this invention is to provide a vehicle including the battery pack provided by this invention.

[0015] Another objective of this invention is to provide a battery pack monitoring method for monitoring the battery pack provided by this invention, comprising the following steps: Detect the concentration of hydrogen sulfide gas inside the casing; The concentration of hydrogen sulfide gas inside the casing is compared with a threshold. If the concentration of hydrogen sulfide gas inside the casing is greater than the threshold, a battery abnormality notification is issued.

[0016] The battery pack provided by this invention includes a housing and a hydrogen sulfide gas sensor. The housing is filled with a composite gas, which includes an inert gas and an alkaline gas. A hydrogen sulfide removal agent is disposed at the bottom of the housing. The hydrogen sulfide gas sensor is disposed within the housing. The housing is filled with a composite gas; the inert gas isolates oxygen and water vapor, preventing the formation of hydrogen sulfide gas from contact between sulfides and oxygen and water vapor. The alkaline gas neutralizes the hydrogen sulfide gas, reducing its generation. The hydrogen sulfide removal agent also neutralizes the hydrogen sulfide gas, further reducing its generation and preventing leakage. The hydrogen sulfide gas sensor can detect the concentration of hydrogen sulfide gas inside the housing in real time. When the removal capacity of the composite gas and the hydrogen sulfide removal agent reaches saturation, the sensor detects that the concentration exceeds a threshold and issues an alarm signal to the user, thus preventing hydrogen sulfide gas leakage due to delayed treatment and improving the safety of the battery pack. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the battery pack structure provided in an embodiment of the present invention; Figure 2 This is a top view of the all-solid-state battery pack provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the cell stack of the all-solid-state battery pack provided in the embodiments of the present invention; Figure 4 This is a schematic diagram of the structure of the control module and notification module of the battery pack provided in an embodiment of the present invention; Figure 5 This is a flowchart of the battery pack monitoring method provided in an embodiment of the present invention.

[0019] Icons: 1-Battery pack; 10-Casing; 20-All-solid-state battery; 30-Combined gas; 40-Hydrogen sulfide remover; 50-Hydrogen sulfide gas sensor; 60-Base; 21-All-solid-state battery stack; 22-Outer packaging; 23-Negative current collector terminal; 24-Positive current collector terminal; 200-Single cell; 201-Positive current collector; 202-Positive active material layer; 203-Solid electrolyte layer; 204-Negative active material; 205-Negative current collector; 73-Control module; 74-Notification module; 731-Central processing unit (CPU); 732-Read-only memory (ROM); 733-Random access memory (RAM); 734-Communication unit; 741-Human-machine interface (HMI); 742-Fault indicator light (MIL); 743-Portable mobile terminal. Detailed Implementation

[0020] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides a battery pack, vehicle, and battery pack monitoring method. Several embodiments are given below to describe in detail the battery pack, vehicle, and battery pack monitoring method provided by this invention.

[0022] The battery pack 1 provided in this embodiment, such as Figures 1 to 5 As shown, it includes a housing 10 and a hydrogen sulfide gas sensor 50; the housing 10 is filled with a composite gas 30, which includes an inert gas and an alkaline gas; a hydrogen sulfide removal agent 40 is provided at the bottom of the housing 10; the hydrogen sulfide gas sensor 50 is disposed inside the housing 10.

[0023] The housing 10 is filled with a composite gas 30. The inert gas isolates oxygen and water vapor, preventing the formation of hydrogen sulfide gas from contact between sulfides and oxygen and water vapor. The alkaline gas neutralizes the hydrogen sulfide gas, reducing its generation. The hydrogen sulfide removal agent 40 also neutralizes the hydrogen sulfide gas, further reducing its generation and preventing leakage to the outside of the housing 10. The hydrogen sulfide gas sensor 50 can detect the concentration of hydrogen sulfide gas inside the housing 10 in real time. When the removal capacity of the composite gas 30 and the hydrogen sulfide removal agent 40 reaches saturation, the hydrogen sulfide gas sensor 50 can promptly detect that the concentration of hydrogen sulfide gas inside the housing 10 exceeds a threshold and issue an alarm signal to the user, thereby preventing hydrogen chloride gas leakage due to untimely handling and improving the safety of the battery pack 1.

[0024] Furthermore, the hydrogen sulfide gas sensor 50 is located at the bottom of the housing 10.

[0025] The hydrogen sulfide gas sensor 50 is located at the bottom of the housing 10 and is arranged around the hydrogen sulfide removal agent 40. The hydrogen sulfide gas sensor 50 detects the hydrogen sulfide gas inside the housing 10 in real time. The arrangement around the hydrogen sulfide removal agent 40 enables more timely detection of the hydrogen sulfide gas concentration.

[0026] When the hydrogen sulfide gas sensor 50 detects that the concentration of hydrogen sulfide gas inside the housing 10 exceeds the threshold, it indicates that the removal capacity of the composite gas 30 and the hydrogen sulfide remover 40 for hydrogen sulfide gas has reached saturation. At this time, the user is notified of the abnormal hydrogen sulfide gas inside the battery, which can prevent excessive emission and gas leakage of hydrogen sulfide.

[0027] Furthermore, the battery pack 1 also includes an all-solid-state battery 20 and a base 60; the base 60 is disposed inside the housing 10, the all-solid-state battery 20 is disposed above the base 60, and the hydrogen sulfide removal agent 40 is disposed below the base 60; the base 60 is provided with vent holes.

[0028] The shell 10 can be made of alloy materials or composite materials such as plastic.

[0029] There can be multiple vent holes, which are evenly distributed on the base 60, making the base 60 appear as a mesh.

[0030] The all-solid-state battery 20 is a rechargeable battery, and at least one of its positive electrode layer and solid electrolyte layer contains sulfides. Within the casing 10, multiple all-solid-state batteries 20 are stacked along their thickness direction, and their stacking is maintained and a corresponding constraint load is provided by a binding member (not shown).

[0031] The base 60 needs to be strong enough to stably support the all-solid-state battery 20, while the vents allow the hydrogen sulfide gas generated by the all-solid-state battery 20 to deposit and pass through the base 60, where it is captured and absorbed by the hydrogen sulfide removal agent 40, thus inhibiting the accumulation of hydrogen sulfide gas inside the battery.

[0032] like Figure 2 As shown, the all-solid-state battery 20 is a laminated battery. The outer packaging 22 can be a packaging material such as a laminated film. The negative electrode current collector 23 and the positive electrode current collector 24 protrude from both sides of the outer packaging. The positive and negative electrode current collectors of the all-solid-state battery 20 are distributed on both sides of the battery, but they can also be distributed on one side. The all-solid-state batteries 20 are electrically connected in parallel or series to form a battery pack, and are held in a stacked state by binding members (not shown).

[0033] like Figure 3 As shown, the all-solid-state battery 20-layer stack 21 consists of three individual cells 200, which serve as the power generation elements of the all-solid-state battery 20. Each individual cell 200 is a power generation unit composed of a positive electrode layer, a negative electrode layer, and a solid electrolyte layer 203 between the positive and negative electrode layers. The positive electrode layer consists of a positive current collector 201 and a positive active material layer 202; the negative electrode layer consists of a negative active material 204 and a negative current collector 205; and the solid electrolyte layer 203 is located between the positive and negative electrode layers. While the all-solid-state battery 20-layer stack 21 shown in the figure consists of three individual cells 200, the number of individual cells 200 is not limited during actual all-solid-state battery 20 cell stacking. One individual cell 200 can form one all-solid-state battery 20-layer stack 21, and multiple individual cells 200 can also form one all-solid-state battery 20-layer stack 21.

[0034] Furthermore, the volume percentage of alkaline gas in composite gas 30 is 1%-5%.

[0035] The volume percentage of alkaline gas in composite gas 30 is 1%-5%, meaning that composite gas 30 is a mixture of alkaline gas and inert gas in a volume ratio of 1:99-5:95. This neutralizes the released hydrogen sulfide gas while preventing high concentrations of alkaline gas from causing severe corrosion to the inside of battery pack 1, thus ensuring the electrochemical stability of the battery.

[0036] Mixing inert and alkaline gases, with a low volume percentage of alkaline gas, can reduce the corrosive effect of alkaline gas on the internal components of the battery pack 1, while also sealing the all-solid-state battery 20, reducing the probability of the all-solid-state battery 20 coming into contact with air, and suppressing the generation of hydrogen sulfide gas.

[0037] Furthermore, the inert gas is nitrogen, helium, or argon, and the alkaline gas is ammonia or amine.

[0038] The inert gas is composed of an inactive gas that does not react with the various materials in the battery pack 1, especially the key materials such as the positive electrode material, the negative electrode material and the solid electrolyte, and does not contain water vapor or oxygen, such as nitrogen, helium or argon.

[0039] Alkaline gases are composed of alkaline gases that can neutralize hydrogen sulfide, such as ammonia or amine gases.

[0040] Furthermore, the hydrogen sulfide removal agent 40 includes a hydrogen sulfide gas adsorbent and / or an alkaline substance.

[0041] The hydrogen sulfide removal agent 40 may include a hydrogen sulfide gas adsorbent, may include an alkaline substance, or may include both a hydrogen sulfide gas adsorbent and an alkaline substance. The hydrogen sulfide gas removal agent composed of a hydrogen sulfide gas adsorbent and an alkaline substance employs a composite system of physical adsorption and chemical neutralization, which, through this dual action, can improve the removal efficiency of hydrogen sulfide gas.

[0042] The amount of hydrogen sulfide remover 40 is 3%-8% of the effective volume inside the housing 10. The effective volume inside the housing 10 is the remaining volume inside the housing 10 after removing the solid-state battery pack 20, hydrogen sulfide sensor and other fixed components. The above arrangement can avoid the hydrogen sulfide remover 40 occupying too much space inside the housing 10, and prevent it from affecting the overall energy density of the battery pack 1.

[0043] Furthermore, the hydrogen sulfide gas adsorbent is activated carbon, silica gel, zeolite, or metal oxide; the alkaline substance is sodium carbonate, lithium carbonate, magnesium carbonate, calcium carbonate, sodium hydroxide, manganese hydroxide, calcium oxide, or magnesium oxide.

[0044] Hydrogen sulfide gas adsorbents can adsorb hydrogen sulfide gas. These adsorbents can be activated carbon, silica gel, zeolite, or metal oxides (such as zinc oxide or iron oxide).

[0045] Alkaline substances can react with hydrogen sulfide gas. Alkaline substances can be sodium carbonate, lithium carbonate, magnesium carbonate, calcium carbonate, sodium hydroxide, manganese hydroxide, calcium oxide, or magnesium oxide.

[0046] Furthermore, the battery pack 1 also includes a control module 73 and a notification module 74; the hydrogen sulfide gas sensor 50 and the notification module 74 are respectively connected to the control module 73. When the hydrogen sulfide gas concentration detected by the hydrogen sulfide gas sensor 50 is greater than the threshold, the control module 73 controls the notification module 74 to send a notification signal.

[0047] When the removal capacity of the composite gas 30 and the hydrogen sulfide remover 40 for hydrogen sulfide gas reaches saturation, the hydrogen sulfide gas sensor 50 can detect in time that the concentration of hydrogen sulfide gas in the housing 10 is greater than the threshold. At this time, the control module 73 controls the notification module 74 to issue an alarm notification signal to remind the user, thereby preventing hydrogen chloride gas leakage due to untimely handling and improving the safety of the battery pack 1.

[0048] The control module 73 includes a central processing unit (CPU) 731, a read-only memory (ROM) 732, a random access memory (RAM) 733, and a communication unit 734, which executes various electronic controls in the system.

[0049] The notification module 74 consists of a human-machine interface (HMI) 741, a fault indicator lamp (MIL) 742, and a portable mobile terminal 743. The portable mobile terminal 743 can be a mobile phone, wristband, tablet computer, or other device with communication capabilities.

[0050] The vehicle provided in this embodiment includes the battery pack 1 provided in this embodiment. The housing 10 is filled with a composite gas 30. The inert gas isolates oxygen and water vapor, preventing the formation of hydrogen sulfide gas from contact between sulfides and oxygen and water vapor. The alkaline gas neutralizes the hydrogen sulfide gas, reducing its generation. The hydrogen sulfide removal agent 40 also neutralizes the hydrogen sulfide gas, reducing its generation and preventing leakage to the outside of the housing 10. A hydrogen sulfide gas sensor 50 can detect the concentration of hydrogen sulfide gas inside the housing 10 in real time. When the removal capacity of the composite gas 30 and the hydrogen sulfide removal agent 40 reaches saturation, the hydrogen sulfide gas sensor 50 can promptly detect that the concentration exceeds a threshold and issue an alarm signal to the user, thereby preventing hydrogen chloride gas leakage due to untimely handling and improving the safety of the battery pack 1.

[0051] The battery pack monitoring method provided in this embodiment is used to monitor the battery pack 1 provided in this embodiment, and includes the following steps: Detect the concentration of hydrogen sulfide gas inside the casing 10; The concentration of hydrogen sulfide gas inside the casing 10 is compared with a threshold. If the concentration of hydrogen sulfide gas inside the casing 10 is greater than the threshold, a battery abnormality notification is issued.

[0052] The hydrogen sulfide gas concentration threshold is set to C, where C is greater than 0, to prevent the hydrogen sulfide gas from being generated and not removed by the composite gas 30 and hydrogen sulfide removal agent 40 before being detected by the hydrogen sulfide gas sensor 50 and triggering an alarm.

[0053] Specifically, in step S11: the hydrogen sulfide gas sensor 50 collects the concentration of hydrogen sulfide gas inside the housing 10 at a fixed frequency; In step S12: The detection value of the hydrogen sulfide gas sensor 50 is fed back to the control module 73. The control module 73 receives the detection value of the hydrogen sulfide sensor and compares it with the set threshold C. If the detection value is less than the threshold C, the step returns to step S11, and the hydrogen sulfide gas sensor 50 continues to detect the concentration of hydrogen sulfide gas in the housing 10. If the detection value is greater than the threshold C, the step proceeds to step S13. Step S13: When the concentration of hydrogen sulfide gas inside the housing 10 exceeds the threshold, the notification module 74 sends a battery abnormality notification. The abnormality notification can be an audio signal, an image signal, or a text signal, such as setting a fault indicator light on the vehicle dashboard to make it flash continuously and make a sound, or sending the notification to the user's portable mobile terminal in the form of SMS or MMS.

[0054] The hydrogen sulfide gas sensor 50 can detect the concentration of hydrogen sulfide gas inside the housing 10 in real time. When the removal capacity of the composite gas 30 and the hydrogen sulfide removal agent 40 for hydrogen sulfide gas reaches saturation, the hydrogen sulfide gas sensor 50 can detect in time that the concentration of hydrogen sulfide gas inside the housing 10 is greater than the threshold and issue an alarm signal to the user to remind the user, thereby preventing hydrogen chloride gas leakage due to untimely handling and improving the safety of the battery pack 1.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery pack, characterized in that, Includes a housing (10) and a hydrogen sulfide gas sensor (50); The housing (10) is filled with a composite gas (30), which includes an inert gas and an alkaline gas; a hydrogen sulfide remover (40) is provided at the bottom of the housing (10); The hydrogen sulfide gas sensor (50) is disposed inside the housing (10).

2. The battery pack according to claim 1, characterized in that, The hydrogen sulfide gas sensor (50) is located at the bottom of the housing (10).

3. The battery pack according to claim 2, characterized in that, The battery pack (1) also includes an all-solid-state battery (20) and a base (60); The base (60) is disposed inside the housing (10), the all-solid-state battery (20) is disposed above the base (60), and the hydrogen sulfide removal agent (40) is disposed below the base (60); the base (60) is provided with vent holes.

4. The battery pack according to claim 1, characterized in that, The alkaline gas accounts for 1%-5% of the volume of the composite gas (30).

5. The battery pack according to claim 1, characterized in that, The inert gas is nitrogen, helium, or argon, and the alkaline gas is ammonia or amine.

6. The battery pack according to claim 1, characterized in that, The hydrogen sulfide removal agent (40) includes a hydrogen sulfide gas adsorbent and / or an alkaline substance.

7. The battery pack according to claim 6, characterized in that, The hydrogen sulfide gas adsorbent is activated carbon, silica gel, zeolite, or metal oxide. The alkaline substance is sodium carbonate, lithium carbonate, magnesium carbonate, calcium carbonate, sodium hydroxide, manganese hydroxide, calcium oxide, or magnesium oxide.

8. The battery pack according to claim 1, characterized in that, The battery pack (1) also includes a control module (73) and a notification module (74); The hydrogen sulfide gas sensor (50) and the notification module (74) are respectively connected to the control module (73). When the hydrogen sulfide gas concentration detected by the hydrogen sulfide gas sensor (50) is greater than the threshold, the control module (73) controls the notification module (74) to send a notification signal.

9. A vehicle, characterized in that, The battery pack (1) includes any one of claims 1-8.

10. A battery pack monitoring method, characterized in that, For monitoring the battery pack (1) according to any one of claims 1-8, the method comprises the following steps: Detect the concentration of hydrogen sulfide gas inside the housing (10); The concentration of hydrogen sulfide gas inside the casing (10) is compared with a threshold. When the concentration of hydrogen sulfide gas inside the casing (10) is greater than the threshold, a battery abnormality notification is issued.

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