Battery packaging assembly and soft package battery in-situ detection and gas production analysis equipment

Abstract

The invention provides a battery packaging assembly and soft package battery in-situ detection and gas production analysis equipment, and relates to the technical field of soft package battery detection.The battery packaging assembly is characterized in that a lower cover plate and an upper cover plate are detachably connected, a sealing cavity is formed between the lower cover plate and the upper cover plate, and at least one of the lower cover plate and the upper cover plate is provided with a windowing area; the windowing area is arranged in the sealing cavity, and the flexible film for sealing the sealing cavity is arranged in the windowing area, so that the soft package battery can be conveniently installed in the sealing cavity in a sealing manner, in-situ detection can be directly performed on the soft package battery, and gas generation in a chemical process can be supported under the condition that the sealing performance is ensured. The lower cover plate and the upper cover plate are both made of polytetrafluoroethylene materials or polyimide materials, are insulated and resistant to high temperature and have extremely low absorption efficiency on X rays and neutrons, and interference on imaging is reduced. And the generated gas can be collected through the gas bag, so that the gas sampling is safer, and the subsequent mass spectrometer analysis is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of soft-pack battery detection, and in particular to a battery packaging component, a soft-pack battery in-situ detection and gas production analysis device. Background Art

[0002] Normally, soft-pack batteries are hot-pressed with aluminum-plastic film. The aluminum-plastic film and its components will absorb a large amount of neutrons, thus affecting the X-ray and neutron transmission intensity, which is not conducive to direct in-situ detection of soft-pack batteries, such as in-situ XRD, in-situ neutron diffraction, and in-situ CT imaging. Moreover, due to uneven electrolyte filling, the battery performance consistency is poor and even the battery life is reduced. In addition, in the in-situ detection and gas production analysis equipment of soft-pack batteries, there are also many inconveniences in the loading, sealing, and collection and detection of generated gases of soft-pack batteries, which in turn affects the convenience and safety of soft-pack battery detection. Summary of the invention

[0003] The object of the present invention is to provide a battery packaging assembly, a soft-pack battery in-situ detection and gas production analysis device to improve the convenience of soft-pack battery detection.

[0004] In a first aspect, the present invention provides a battery packaging assembly, comprising: a lower cover plate and an upper cover plate detachably connected to the lower cover plate;

[0005] A sealed cavity is formed between the lower cover plate and the upper cover plate, and at least one of the lower cover plate and the upper cover plate is provided with a window area, and a flexible film for closing the sealed cavity is provided in the window area.

[0006] In combination with the first aspect, the present invention provides a first possible implementation manner of the first aspect, wherein at least one of the lower cover plate and the upper cover plate is provided with a liquid injection port, and the liquid injection port is in fluid communication with the sealing cavity.

[0007] In combination with the first aspect, the present invention provides a second possible implementation of the first aspect, wherein at least one of the lower cover plate and the upper cover plate is provided with a first interface and / or a second interface, and the first interface and the second interface are respectively detachably connected with a blocking piece.

[0008] In combination with the first aspect, the present invention provides a third possible implementation manner of the first aspect, wherein at least one of the lower cover plate and the upper cover plate is provided with a groove surrounding the sealing cavity, and a sealing ring is installed in the groove.

[0009] In combination with the first aspect, the present invention provides a fourth possible implementation manner of the first aspect, wherein the lower cover plate and the upper cover plate are respectively integrally formed with the flexible membrane.

[0010] In combination with the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein the lower cover plate or the upper cover plate is installed with a tab connection member, and the tab connection member extends outward from the sealed cavity and is exposed.

[0011] In combination with the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein the lower cover plate and the upper cover plate are respectively configured to be polytetrafluoroethylene material or polyimide material, and the sealing cavity is filled with a perfluoroether rubber pad.

[0012] In a second aspect, the soft-pack battery in-situ detection and gas production analysis equipment provided by the present invention comprises: a vacuum component, a gas collection component and a battery packaging component described in the first aspect;

[0013] The vacuum assembly and the gas collecting assembly are respectively detachably connected to the lower cover plate or the upper cover plate, and the vacuum assembly and the gas collecting assembly are respectively in fluid communication with the sealed cavity.

[0014] In combination with the second aspect, the present invention provides a first possible implementation manner of the second aspect, wherein the vacuum component comprises: a vacuum pump and a first control valve, and the vacuum pump, the first control valve and the sealing chamber are fluidically connected in sequence.

[0015] In combination with the second aspect, the present invention provides a second possible implementation of the second aspect, wherein the gas collection assembly comprises: an airbag and a second control valve, and the airbag, the second control valve and the sealing chamber are fluidically connected in sequence.

[0016] The embodiments of the present invention bring the following beneficial effects: the lower cover plate and the upper cover plate are detachably connected, and a sealed cavity is formed between the lower cover plate and the upper cover plate, and at least one of the lower cover plate and the upper cover plate is provided with a window area, and a flexible membrane for sealing the sealed cavity is provided in the window area, so that the soft-pack battery can be sealed and installed in the sealed cavity, the soft-pack battery can be directly tested in situ, and the generation of gas in the chemical process can be supported while ensuring the sealing performance.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related technologies, the drawings required for use in the specific embodiments or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 An exploded diagram of a battery packaging assembly and a soft-pack battery provided in an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of a soft-pack battery in-situ detection and gas production analysis device provided in an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of an in-situ detection and gas production analysis device for soft-pack batteries provided in an embodiment of the present invention.

[0022] Icons: 001 - lower cover; 002 - upper cover; 201 - liquid filling port; 003 - sealing cavity; 004 - window area; 005 - flexible membrane; 006 - first interface; 007 - second interface; 008 - groove; 009 - sealing ring; 010 - ear connection piece; 011 - vacuum assembly; 111 - vacuum pump; 112 - first control valve; 012 - gas collection assembly; 121 - airbag; 122 - second control valve; 013 - soft pack battery. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are only used to describe the difference in names, and cannot be understood as indicating or implying relative importance. The physical quantities in the formula, if not separately marked, should be understood as basic quantities of the basic units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] like Figure 1 and Figure 2 As shown, the battery packaging assembly provided by the embodiment of the present invention includes: a lower cover plate 001 and an upper cover plate 002 detachably connected to the lower cover plate 001; a sealed cavity 003 is formed between the lower cover plate 001 and the upper cover plate 002, and at least one of the lower cover plate 001 and the upper cover plate 002 is provided with a window area 004, and a flexible membrane 005 for closing the sealed cavity 003 is provided in the window area 004.

[0027] In this embodiment, the lower cover plate 001 and the upper cover plate 002 can be detachably assembled by bolt connection or snap connection, and the soft-pack battery 013 can be enclosed in the sealed cavity 003. When the battery packaging assembly is used alone, the soft-pack battery 013 can be detected in situ. When the battery packaging assembly is applied to the soft-pack battery in-situ detection and gas production analysis equipment, the gas generated inside the sealed cavity 003 can be collected, thereby achieving safe and convenient gas sampling, which is convenient for subsequent mass spectrometer analysis.

[0028] like Figure 1 and Figure 3 As shown, in an optional embodiment, at least one of the lower cover plate 001 and the upper cover plate 002 is provided with a liquid injection port 201, and the liquid injection port 201 is in fluid communication with the sealed cavity 003. A rubber sleeve that tends to remain closed can be embedded in the liquid injection port 201 to maintain sealing in a natural state. When injecting electrolyte, the liquid injection device can be inserted into the liquid injection port 201 to open the rubber sleeve, thereby injecting the electrolyte into the sealed cavity 003.

[0029] Preferably, before injecting the electrolyte, the sealed cavity 003 can be sucked by the vacuum component 011 to form a negative pressure state inside the sealed cavity 003. When injecting the electrolyte, it can be ensured that the electrolyte is fully dispersed in the sealed cavity 003, thereby improving the uniformity of the electrolyte distribution.

[0030] like Figure 1 and Figure 3 As shown, at least one of the lower cover plate 001 and the upper cover plate 002 is provided with a first interface 006 and / or a second interface 007, and the first interface 006 and the second interface 007 are respectively detachably connected with a blocking piece.

[0031] Among them, at least one of the first interface 006 and the second interface 007 can be set on the lower cover plate 001 or the upper cover plate 002, or the first interface 006 can be set on the lower cover plate 001, and the second interface 007 can be set on the upper cover plate 002. In this embodiment, the first interface 006 and the second interface 007 are both set on the upper cover plate 002. When the battery packaging assembly is used alone to perform in-situ detection on the soft-pack battery 013, a plugging member can be used to plug the first interface 006 and the second interface 007 through a snap or bolt connection. When the battery packaging assembly is applied to the soft-pack battery in-situ detection and gas production analysis equipment, the vacuum assembly 011 can be connected to the first interface 006, and the gas collection assembly 012 can be connected to the second interface 007.

[0032] like Figure 1 and Figure 2 As shown, at least one of the lower cover plate 001 and the upper cover plate 002 is provided with a groove 008 surrounding the sealing cavity 003 , and a sealing ring 009 is installed in the groove 008 .

[0033] In an optional embodiment, grooves 008 may be provided on the opposite end faces of the lower cover plate 001 and the upper cover plate 002, and a sealing ring 009 may be installed in the groove 008. When the lower cover plate 001 and the upper cover plate 002 are connected, the sealing ring 009 is pressed tightly between the lower cover plate 001 and the upper cover plate 002, thereby ensuring a good sealing effect of the sealing cavity 003.

[0034] In an optional embodiment, the lower cover plate 001 and the upper cover plate 002 are respectively formed integrally with the flexible film 005. The lower cover plate 001 and the upper cover plate 002 are both provided with a window area 004, and have a flexible film 005 that closes the window area 004 and faces the sealed cavity 003. The lower cover plate 001 and the upper cover plate 002 are respectively formed integrally with the flexible film 005. The deformation of the flexible film 005 can provide a margin space for the inflation and expansion of the sealed cavity 003, and can avoid the problem of sealing failure caused by the expansion of the internal space of the sealed cavity 003.

[0035] See also Figure 1 and Figure 3 The lower cover plate 001 or the upper cover plate 002 is installed with a tab connector 010, which extends outward from the sealed cavity 003 and is exposed. The tab connector 010 is connected to the soft-pack battery 013 in the sealed cavity 003 and serves as a lead for charging and discharging the soft-pack battery 013. Multiple charge and discharge tests can be performed on the soft-pack battery 013 under sealed conditions.

[0036] It should be noted that the lower cover 001 and the upper cover 002 are respectively configured with polytetrafluoroethylene or polyimide materials. On the one hand, they have the functions of absolute insulation and short circuit prevention. On the other hand, they have high temperature resistance and are suitable for testing of battery high temperature conditions. In addition, the lower cover 001 and the upper cover 002 have extremely low absorption efficiency for X-rays and neutrons, which can reduce interference with imaging. The sealing cavity 003 is filled with a perfluoroether rubber pad, which can ensure that the soft-pack battery 013 is pressed and fixed on the one hand, and the perfluoroether rubber pad has ductility on the other hand, which can further improve the sealing effect.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, the soft-pack battery in-situ detection and gas production analysis equipment provided by an embodiment of the present invention includes: a vacuum component 011, a gas collection component 012 and a battery packaging component described in the above embodiment; the vacuum component 011 and the gas collection component 012 are respectively detachably connected to the lower cover plate 001 or the upper cover plate 002, and the vacuum component 011 and the gas collection component 012 are respectively connected to the fluid of the sealed cavity 003.

[0038] When in use, the soft pack battery 013 is assembled and sealed in the sealed cavity 003 between the lower cover plate 001 and the upper cover plate 002, and the electrolyte is injected through the injection port 201. The air in the soft pack can be sucked through the vacuum component 011 to adjust the wettability and uniformity of the electrolyte in the battery. The gas generated during the battery electrification or cycle can be collected by the gas collection component 012 for subsequent mass spectrometry analysis.

[0039] In the embodiment of the present invention, the vacuum assembly 011 includes: a vacuum pump 111 and a first control valve 112 , and the vacuum pump 111 , the first control valve 112 and the sealing chamber 003 are fluidically connected in sequence.

[0040] The vacuum pump 111 is a micro pump, which is light and easy to carry. The on-off state of the vacuum pump 111 and the first interface 006 can be adjusted by the first control valve 112. When the vacuum pump 111 is finished pumping, the first control valve 112 can be closed to maintain the negative pressure state inside the soft-pack battery 013. Injecting electrolyte under negative pressure can improve the wettability of the electrolyte and the battery cell.

[0041] Furthermore, the gas collection assembly 012 includes: an airbag 121 and a second control valve 122, and the airbag 121, the second control valve 122 and the sealing chamber 003 are fluidically connected in sequence.

[0042] Among them, the airbag 121 is made of one of the materials such as polypropylene (PP), polyethylene (PE), polyester (PET), etc., and has good flexibility, pressure resistance, wear resistance, corrosion resistance and heat insulation. It can safely collect gas and is easy to carry and transport. In addition, two second control valves 122 can be installed between the airbag 121 and the second interface 007, and the pipeline between the two second control valves 122 is connected by a flange. When the second control valve 122 is closed, the battery packaging assembly can be used alone for in-situ detection of the soft-pack battery 013. When the two second control valves 122 are opened at the same time, the airbag 121 can collect gas, which is convenient for subsequent analysis such as mass spectrometry.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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 packaging assembly, characterized in that: include: A lower cover plate (001) and an upper cover plate (002) detachably connected to the lower cover plate (001); A sealed cavity (003) is formed between the lower cover plate (001) and the upper cover plate (002), and at least one of the lower cover plate (001) and the upper cover plate (002) is provided with a window area (004), and a flexible membrane (005) for closing the sealed cavity (003) is provided in the window area (004).

2. The battery packaging assembly according to claim 1, characterized in that: At least one of the lower cover plate (001) and the upper cover plate (002) is provided with a liquid injection port (201), and the liquid injection port (201) is in fluid communication with the sealed cavity (003).

3. The battery packaging assembly according to claim 1, characterized in that: At least one of the lower cover plate (001) and the upper cover plate (002) is provided with a first interface (006) and / or a second interface (007), and the first interface (006) and the second interface (007) are respectively detachably connected with a blocking piece.

4. The battery packaging assembly according to claim 1, characterized in that: At least one of the lower cover plate (001) and the upper cover plate (002) is provided with a groove (008) surrounding the sealing cavity (003), and a sealing ring (009) is installed in the groove (008).

5. The battery packaging assembly according to claim 1, characterized in that: The lower cover plate (001) and the upper cover plate (002) are respectively formed integrally with the flexible membrane (005).

6. The battery packaging assembly according to claim 1, characterized in that: The lower cover plate (001) or the upper cover plate (002) is installed with a tab connection member (010), and the tab connection member (010) extends outward from the sealed cavity (003) and is exposed.

7. The battery packaging assembly according to claim 1, characterized in that: The lower cover plate (001) and the upper cover plate (002) are respectively made of polytetrafluoroethylene material or polyimide material, and a perfluoroether rubber pad is filled in the sealing cavity (003).

8. A soft pack battery in-situ detection and gas production analysis device, characterized in that: include: A vacuum assembly (011), a gas collection assembly (012), and a battery packaging assembly as claimed in any one of claims 1 to 7; The vacuum component (011) and the gas collection component (012) are respectively detachably connected to the lower cover plate (001) or the upper cover plate (002), and the vacuum component (011) and the gas collection component (012) are respectively in fluid communication with the sealed cavity (003).

9. The soft-pack battery in-situ detection and gas generation analysis equipment according to claim 8, characterized in that: The vacuum assembly (011) comprises: a vacuum pump (111) and a first control valve (112); the vacuum pump (111), the first control valve (112) and the sealed chamber (003) are fluidically connected in sequence.

10. The soft pack battery in-situ detection and gas generation analysis equipment according to claim 8, characterized in that: The gas collection assembly (012) comprises: an air bag (121) and a second control valve (122); the air bag (121), the second control valve (122) and the sealed chamber (003) are fluidically connected in sequence.

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