Single battery and electric device

Abstract

The utility model provides a single battery and an electric device, and relates to the technical field of batteries. Each single battery comprises a shell and a plurality of anti-explosion valves, the shell is provided with a containing cavity, a plurality of liquid injection holes communicated with the containing cavity are formed in the shell, and the multiple anti-explosion valves block the multiple liquid injection holes in a one-to-one correspondence mode. According to the single battery provided by the invention, the electrolyte can be more efficiently injected into the accommodating cavity of the shell through the plurality of liquid injection holes, the production efficiency of the single battery is improved, gas in the accommodating cavity of the shell can be more efficiently discharged through the plurality of anti-explosion valves, and the use safety of the single battery is improved. And meanwhile, the liquid injection hole is directly used as a mounting hole of the anti-explosion valve, so that the manufacturing cost of the single battery is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a single cell battery and an electrical device. Background Art

[0002] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present disclosure and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art known to those skilled in the art.

[0003] Cells are typically equipped with an injection port for injecting electrolyte and an explosion-proof valve for pressure relief. However, existing cells only have one injection port and one explosion-proof valve, typically located on the top cover. This reduces both injection efficiency and pressure relief efficiency, preventing gas generated within the cell from being promptly discharged, thus compromising safety. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a single cell battery and an electrical device, aiming to solve the technical problems of low liquid injection efficiency and low pressure relief efficiency.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a single battery, comprising:

[0007] Multiple explosion-proof valves;

[0008] The shell has a receiving cavity, and a plurality of liquid injection holes respectively communicated with the receiving cavity are opened on the shell. The plurality of explosion-proof valves are sealed in the plurality of liquid injection holes in a one-to-one correspondence.

[0009] In one embodiment of the first aspect, the liquid injection hole and the explosion-proof valve are provided on at least two sides of the shell.

[0010] In one of the embodiments of the first aspect, an opening communicating with the accommodating cavity is provided on the shell, the opening is located on the circumferential side of the shell, a plurality of the injection holes are arranged at intervals along the circumferential side, and a plurality of the explosion-proof valves are arranged at intervals along the circumferential side.

[0011] In one embodiment of the first aspect, at the position of each of the liquid injection holes, an internal thread is provided on the hole wall of the liquid injection hole, and an external thread adapted to the internal thread is provided on the explosion-proof valve to achieve a threaded connection between the explosion-proof valve and the housing.

[0012] In one embodiment of the first aspect, the explosion-proof valve includes a main body and a barrier portion, the main body is provided with a vent and an exhaust hole connected to the vent, the vent is used to communicate with the accommodating cavity, the barrier portion is arranged in the vent and allows the gas in the accommodating cavity to pass through.

[0013] In one embodiment of the first aspect, the barrier portion includes a drying layer, an oil-isolating layer, and a water-isolating layer, and the drying layer, the oil-isolating layer, and the water-isolating layer are spaced apart along a center line direction of the vent hole.

[0014] In one embodiment of the first aspect, the waterproof layer is located at a position where the ventilation hole is close to the accommodating cavity, the drying layer is located at a position where the ventilation hole is close to the exhaust hole, and the oil-proof layer is located between the waterproof layer and the drying layer.

[0015] In one embodiment of the first aspect, a first connecting hole, a second connecting hole and a third connecting hole are respectively opened on the hole wall of the ventilation hole, the first connecting hole, the second connecting hole and the third connecting hole are respectively connected to the ventilation hole, the edge portion of the water-proof layer is arranged in the first connecting hole, the edge portion of the oil-proof layer is arranged in the second connecting hole, and the edge portion of the drying layer is arranged in the third connecting hole.

[0016] In one embodiment of the first aspect, a plurality of reinforcement grooves are formed on the outer side of the shell, and two adjacent reinforcement grooves are spaced apart.

[0017] In a second aspect, an embodiment of the present application further provides an electrical device comprising the single cell battery described in any of the above embodiments.

[0018] The beneficial effects of this application are as follows:

[0019] The single cell battery provided in this application has multiple injection holes and multiple explosion-proof valves provided on the housing. The multiple explosion-proof valves are correspondingly sealed to the multiple injection holes. This allows for more efficient injection of electrolyte into the housing's accommodating cavity through the multiple injection holes, improving the production efficiency of the single cell battery. The multiple explosion-proof valves allow for more efficient exhaust of gas from the housing's accommodating cavity, enhancing the safety of the single cell battery. Furthermore, using the injection holes directly as mounting holes for the explosion-proof valves reduces the manufacturing cost of the single cell battery.

[0020] In order to make the above-mentioned objects, features and advantages of the present application 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

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the assembly structure of the explosion-proof valve and the housing from one perspective is shown in some embodiments of the present application;

[0023] Figure 2 A schematic diagram of the assembly structure of the explosion-proof valve and the housing from another perspective in some embodiments of the present application is shown;

[0024] Figure 3 A schematic diagram of the assembly structure of the explosion-proof valve and the housing in some embodiments of the present application from another perspective is shown;

[0025] Figure 4 A schematic diagram of the assembly structure of the explosion-proof valve and the housing in some embodiments of the present application from another perspective is shown;

[0026] Figure 5 Shown Figure 4 Schematic diagram of the cross-sectional structure at AA in the middle;

[0027] Figure 6 Shown Figure 5 Schematic diagram of the enlarged structure of the middle B area;

[0028] Figure 7 Shows a schematic structural diagram of a housing in some embodiments of the present application;

[0029] Figure 8 A schematic structural diagram of a main body of an explosion-proof valve in some embodiments of the present application is shown;

[0030] Figure 9 Another perspective structural diagram of the main body of the explosion-proof valve in some embodiments of the present application is shown;

[0031] Figure 10 Shown Figure 9 Schematic diagram of the cross-sectional structure at CC in the middle.

[0032] Description of main component symbols:

[0033] 100-explosion-proof valve; 110-main body; 111-external thread; 112-vent; 113-exhaust hole; 114-first connecting hole; 115-second connecting hole; 116-third connecting hole; 120-blocking part; 121-drying layer; 122-oil-isolating layer; 123-water-isolating layer; 200-shell; 210-accommodating chamber; 220-liquid injection hole; 221-internal thread; 230-opening; 240-reinforced groove. DETAILED DESCRIPTION

[0034] The following describes in detail embodiments of the present application. 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 application and are not to be construed as limiting the present application.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0037] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0038] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0039] Cells are typically equipped with an injection port for injecting electrolyte and an explosion-proof valve for pressure relief. However, existing cells only have one injection port and one explosion-proof valve, typically located on the top cover. This reduces both injection efficiency and pressure relief efficiency, preventing gas generated within the cell from being promptly discharged, thus compromising safety. Furthermore, the injection port and explosion-proof valve are typically located separately on the top cover, requiring a mounting hole for the valve, which increases the manufacturing cost of the cell.

[0040] In order to solve the above technical problems, on the first aspect, the embodiments of the present application provide a single cell battery, which relates to the field of battery technology and is mainly used in energy storage devices, new energy vehicles, spacecraft, ships and other electrical devices.

[0041] like Figure 1 、 Figure 2 and Figure 7 As shown, the single battery provided in this embodiment includes a plurality of explosion-proof valves 100 and a housing 200 .

[0042] The housing 200 has a receiving cavity 210 , and a plurality of liquid injection holes 220 are opened on the housing 200 and are respectively connected to the receiving cavity 210 . The plurality of explosion-proof valves 100 are respectively blocked in the plurality of liquid injection holes 220 .

[0043] It should be noted that “multiple explosion-proof valves 100 are blocked in a one-to-one correspondence with multiple liquid injection holes 220 ” means that each explosion-proof valve 100 is blocked in one liquid injection hole 220 , that is, the number of explosion-proof valves 100 is the same as the number of liquid injection holes 220 .

[0044] It will be appreciated that in the single cell provided in this embodiment, since the housing 200 is provided with multiple injection holes 220 and multiple explosion-proof valves 100, the multiple explosion-proof valves 100 are correspondingly sealed to the multiple injection holes 220. This allows for more efficient injection of electrolyte into the housing cavity 210 of the housing 200 through the multiple injection holes 220, thereby improving the production efficiency of the single cell. The multiple explosion-proof valves 100 allow for more efficient exhaust of gas from the housing cavity 210 of the housing 200, thereby improving the safety of the single cell. Furthermore, using the injection holes 220 directly as mounting holes for the explosion-proof valves 100 reduces the manufacturing cost of the single cell.

[0045] like Figure 3 and Figure 7 As shown, in one embodiment, a liquid injection hole 220 and an explosion-proof valve 100 are provided on at least two sides of the housing 200. This allows liquid injection and pressure relief to be performed from at least two sides of the housing 200. Figure 3 As shown, the bottom, left and right sides of the housing 200 are each provided with a liquid injection hole 220 and an explosion-proof valve 100 .

[0046] like Figures 1 to 3 As shown, further, an opening 230 communicating with the accommodating chamber 210 is provided on the shell 200, and the opening 230 is located on the peripheral side of the shell 200. Multiple injection holes 220 are arranged at intervals along the peripheral side, and multiple explosion-proof valves 100 are arranged at intervals along the peripheral side.

[0047] In this embodiment, multiple injection holes 220 and multiple explosion-proof valves 100 are provided at intervals along the circumference of the housing 200 , thereby improving injection efficiency and pressure relief efficiency, thereby improving the production efficiency and use safety of the single battery.

[0048] Of course, for the above embodiment, multiple injection holes 220 and multiple explosion-proof valves 100 can also be set on only one side of the shell 200. No specific limitation is made to the layout of the multiple injection holes 220 and multiple explosion-proof valves 100.

[0049] like Figures 7 to 9 As shown, in one embodiment, an internal thread 221 is provided on the wall of each liquid injection hole 220, and an external thread 111 is provided on the explosion-proof valve 100 to adapt to the internal thread 221, thereby achieving a threaded connection between the explosion-proof valve 100 and the housing 200. Thus, after liquid injection is completed, the explosion-proof valve 100 can be installed on the housing 200 by screwing it, thereby sealing the liquid injection hole 220. This eliminates the need for laser welding and reduces the manufacturing cost of the single battery. After the explosion-proof valve 100 is used to relieve pressure, it can be removed and replaced with a new one, allowing the single battery to continue to be used.

[0050] Of course, for the above embodiment, a buckle can also be arranged on the explosion-proof valve 100, and a buckle slot is arranged at the position of the liquid injection hole 220, and the buckle is buckled at the buckle slot, which also facilitates the installation and disassembly of the explosion-proof valve 100.

[0051] As shown in Figures 4 to 6 one embodiment, the explosion-proof valve 100 includes a main body part 110 and a barrier part 120, the main body part 110 is provided with a vent hole 112 and an exhaust hole 113 communicating with the vent hole 112, the vent hole 112 is used for communication with the accommodation cavity 210, and the barrier part 120 is arranged in the vent hole 112 and allows the gas in the accommodation cavity 210 to pass through.

[0052] In this embodiment, since the barrier part 120 is arranged in the vent hole 112 and allows the gas in the accommodation cavity 210 to pass through, the explosion-proof valve 100 can discharge the gas in the accommodation cavity 210, at the same time, the explosion-proof valve 100 can prevent the electrolyte in the accommodation cavity 210 from flowing out, and prevent the objects in the external environment from entering the accommodation cavity 210, thereby improving the safety of the single battery in use.

[0053] It should be noted that when the explosion-proof valve 100 includes the main body part 110 and the barrier part 120, the external thread 111 mentioned in the foregoing is formed on the circumferential side of the main body part 110, that is, the explosion-proof valve 100 is screwed with the shell 200 through the external thread 111 on the main body part 110.

[0054] As shown in Figure 5 and Figure 6 further, the barrier part 120 includes a drying layer 121, an oil separation layer 122 and a water separation layer 123, and the drying layer 121, the oil separation layer 122 and the water separation layer 123 are arranged along the center line direction of the vent hole 112.

[0055] In this embodiment, by arranging the drying layer 121, the oil separation layer 122 and the water separation layer 123 along the center line direction of the vent hole 112, the drying layer 121 prevents the water vapor in the external environment from entering the accommodation cavity 210, the water separation layer 123 prevents the aqueous electrolyte (electrolyte solution based on water) in the accommodation cavity 210 from flowing out, and the oil separation layer 122 prevents the oil-based electrolyte (electrolyte solution based on oil) in the accommodation cavity 210 from flowing out, all of the drying layer 121, the oil separation layer 122 and the water separation layer 123 can pass through the gas, so that the gas generated in the accommodation cavity 210 can be smoothly discharged from the exhaust hole 113 to the external environment through the vent hole 112.

[0056] As shown in Figure 5 and Figure 6As shown, further, the waterproof layer 123 is located at the position of the ventilation hole 112 close to the accommodating cavity 210, the drying layer 121 is located at the position of the ventilation hole 112 close to the exhaust hole 113, and the oil-proof layer 122 is located between the waterproof layer 123 and the drying layer 121, so as to better achieve the barrier between the accommodating cavity 210 and the external environment.

[0057] like Figure 6 、 Figure 9 and Figure 10 As shown, further, a first connecting hole 114, a second connecting hole 115 and a third connecting hole 116 are respectively opened on the hole wall of the vent 112, the first connecting hole 114, the second connecting hole 115 and the third connecting hole 116 are respectively connected to the vent 112, the edge portion of the water-proof layer 123 is arranged in the first connecting hole 114, the edge portion of the oil-proof layer 122 is arranged in the second connecting hole 115, and the edge portion of the drying layer 121 is arranged in the third connecting hole 116.

[0058] In this embodiment, the first connection hole 114 facilitates the installation of the waterproof layer 123 , the second connection hole 115 facilitates the installation of the oil-proof layer 122 , and the third connection hole 116 facilitates the installation of the drying layer 121 .

[0059] like Figure 8 As shown, further, a plurality of exhaust holes 113 are provided, and two adjacent exhaust holes 113 are arranged at intervals.

[0060] For example, the number of the exhaust holes 113 may be two, three, four, five, etc., which is not specifically limited here.

[0061] In this embodiment, a plurality of exhaust holes 113 are arranged at intervals on the main body 110 of the explosion-proof valve 100, and each exhaust hole 113 is connected to the vent hole 112. This can efficiently discharge the gas in the accommodating chamber 210, and can also prevent objects in the external environment from entering the accommodating chamber 210.

[0062] like Figure 1 、 Figure 2 and Figure 7 As shown, in one embodiment, a plurality of reinforcement grooves 240 are formed on the outer side of the housing 200 , and two adjacent reinforcement grooves 240 are spaced apart.

[0063] For example, the number of the reinforcement grooves 240 may be two, three, four, five, six, etc., and is not specifically limited here.

[0064] In this embodiment, multiple reinforcement grooves 240 are provided at intervals on the outer side of the housing 200. This increases the structural strength and stability of the housing 200, thereby improving the safety of the battery cells. Furthermore, the housing 200 with multiple reinforcement grooves 240 is lighter, thereby reducing the overall weight of the battery cells.

[0065] like Figure 4 and Figure 5 As shown, in one embodiment, the wall thickness of the housing 200 is T, which satisfies: 0.5 mm ≤ T ≤ 20 mm.

[0066] Exemplarily, the wall thickness T of the shell 200 can be selected as any value among 0.5mm, 0.6mm, 0.8mm, 1mm, 2mm, 2.1mm, 2.2mm, 2.5mm, 3mm, 4mm, 4.5mm, 5mm, 5.6mm, 7mm, 8mm, 10mm, 11mm, 12mm, 13.2mm, 15mm, 16mm, 18mm, 18.1mm, 19mm, 20mm or any value in a range consisting of any two of them, and no specific limitation is made here.

[0067] It should be noted that if the value of T is too large, the housing 200 will occupy too much space, affecting the energy density of the single battery. If the value of T is too small, the structural stability and strength of the housing 200 will be reduced, affecting the safety of the single battery.

[0068] In this embodiment, by controlling the wall thickness T of the housing 200 within the range of 0.5 mm to 20 mm, the safety of the single battery can be improved while the single battery has a higher energy density.

[0069] In one embodiment, the shell 200 is made of plastic material. Compared with metal material, the use of plastic material reduces the weight of the single battery, and the plastic material has insulating properties, which reduces the risk of short circuit, thereby increasing the safety of the single battery.

[0070] Illustratively, the plastic material is one of polyphenylene sulfide (PPS), polypropylene (PP), acrylonitrile butadiene styrene (ABS) and polyethylene terephthalate (PET), and no specific limitation is given here.

[0071] In a second aspect, an embodiment of the present application provides an electrical device comprising a single cell in any of the above embodiments.

[0072] It can be understood that since the electrical device provided in this embodiment has the single cell in any embodiment of the first aspect above, it has all the beneficial effects of the single cell, which will not be described in detail here.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 present application. In this specification, the schematic representations of the above terms do 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. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0074] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A single battery, characterized in that: include: Multiple explosion-proof valves; The shell has a receiving cavity, and a plurality of liquid injection holes respectively communicated with the receiving cavity are opened on the shell. The plurality of explosion-proof valves are sealed in the plurality of liquid injection holes in a one-to-one correspondence.

2. The single cell according to claim 1, characterized in that: The liquid injection hole and the explosion-proof valve are provided on at least two sides of the shell.

3. The single cell according to claim 2, characterized in that: The shell is provided with an opening communicating with the accommodating cavity, the opening is located on the circumference of the shell, a plurality of the injection holes are arranged at intervals along the circumference, and a plurality of the explosion-proof valves are arranged at intervals along the circumference.

4. The single cell according to claim 1, characterized in that: At the position of each of the liquid injection holes, an internal thread is provided on the hole wall of the liquid injection hole, and an external thread adapted to the internal thread is provided on the explosion-proof valve to achieve threaded connection between the explosion-proof valve and the housing.

5. The single cell according to any one of claims 1 to 4, characterized in that: The explosion-proof valve includes a main body and a barrier portion. The main body is provided with a vent and an exhaust hole connected to the vent. The vent is used to communicate with the accommodating cavity. The barrier portion is arranged in the vent and allows the gas in the accommodating cavity to pass through.

6. The single cell according to claim 5, characterized in that: The barrier portion comprises a drying layer, an oil-isolating layer and a water-isolating layer, and the drying layer, the oil-isolating layer and the water-isolating layer are arranged at intervals along the center line direction of the vent hole.

7. The single cell according to claim 6, characterized in that: The water-proof layer is located at a position where the ventilation hole is close to the accommodating cavity, the drying layer is located at a position where the ventilation hole is close to the exhaust hole, and the oil-proof layer is located between the water-proof layer and the drying layer.

8. The single cell according to claim 6, characterized in that: A first connecting hole, a second connecting hole and a third connecting hole are respectively opened on the hole wall of the ventilation hole, and the first connecting hole, the second connecting hole and the third connecting hole are respectively connected to the ventilation hole. The edge portion of the water-proof layer is arranged in the first connecting hole, the edge portion of the oil-proof layer is arranged in the second connecting hole, and the edge portion of the drying layer is arranged in the third connecting hole.

9. The single cell according to any one of claims 1 to 4, characterized in that: A plurality of reinforcement grooves are provided on the outer side of the shell, and two adjacent reinforcement grooves are arranged at intervals.

10. An electrical device, characterized in that: A single cell battery comprising any one of claims 1 to 9.

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