Shell structure and battery

Abstract

The utility model provides a shell structure and a battery, relates to the technical field of battery accessories, and aims to solve the problems that gas generated in the battery cannot be exhausted in time, and the battery is expanded and even exploded to a certain extent. The shell structure provided by the utility model comprises a top cover assembly, an anti-explosion valve and a shell, the shell forms an opening, and the top cover assembly covers the opening and forms a containing cavity with the shell. The top cover assembly comprises lower plastic and an end cover, an air inlet part and an air outlet part are formed on the lower plastic, an air passing channel is formed between the air inlet part and the air outlet part, and the anti-explosion valve is arranged on the end cover and corresponds to the air outlet part in position.

Description

Technical Field

[0001] The utility model relates to the technical field of battery accessories, in particular to a housing structure and a battery. Background Art

[0002] With the development of lithium batteries and new energy vehicles, the safety of lithium batteries has always been an important reference for the performance of lithium batteries. During the use of lithium batteries, gases are generated due to the charge and discharge of the electrolyte, and the gases accumulate rapidly during the thermal runaway of lithium batteries. Therefore, if the gases are not discharged in time, it will cause the battery to malfunction or even explode, affecting the safety performance of the battery.

[0003] Therefore, there is an urgent need to provide a housing structure and a battery to solve the problems existing in the prior art to a certain extent. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a housing structure and a battery to solve the problem that the gases generated in the battery cannot be discharged in time, resulting in battery bulging or even explosion to a certain extent.

[0005] A housing structure provided by the utility model includes a top cover assembly, an explosion-proof valve and a housing; the housing forms an opening, and the top cover assembly covers the opening to form a receiving cavity with the housing; the top cover assembly includes a lower plastic and an end cover, the lower plastic is formed with an air inlet part and an air outlet part, and an air passage is formed between the air inlet part and the air outlet part, the explosion-proof valve is arranged on the end cover, and the explosion-proof valve is arranged corresponding to the position of the air outlet part.

[0006] Wherein, the air inlet part is formed at both ends of the lower plastic, and the air outlet part is located between the air inlet parts at both ends.

[0007] Specifically, the air passage includes a main passage and a branch passage, there are multiple main passages, and both ends of the multiple main passages communicate with the air outlet part and the air inlet part, and the branch passage communicates with the main passage between the air outlet part and the air inlet part.

[0008] Specifically, expansion parts are formed at both ends of the main passage, and the expansion parts are in a horn shape, and the end with a larger diameter of the expansion part is communicated with the corresponding air inlet part and air outlet part.

[0009] Wherein, the air inlet part is an air inlet groove, and a plurality of first ventilation holes are distributed in the air inlet groove.

[0010] Specifically, the air outlet part is an air outlet groove, and a plurality of second ventilation holes are distributed in the air outlet groove.

[0011] Further, a plurality of third ventilation holes are formed at the junction of the exhaust groove and the lower plastic. The plurality of third ventilation holes are all in a funnel-shaped structure, and the diameter of the side of the third ventilation hole facing the end cap is smaller than the diameter of the side facing the housing.

[0012] Further, a plurality of fourth ventilation holes are formed on both sides of the lower plastic corresponding to the exhaust groove. The fourth ventilation holes on both sides of the exhaust groove are evenly distributed and arranged in one-to-one correspondence.

[0013] Furthermore, a plurality of adsorption parts are formed on the inner wall of the housing, and the plurality of adsorption parts are arranged in an array.

[0014] Compared with the prior art, the housing structure provided by the present utility model has the following advantages:

[0015] The housing structure provided by the present utility model includes a top cover assembly, an explosion-proof valve, and a housing. The housing forms an opening, and the top cover assembly covers the opening to form a receiving cavity with the housing. The top cover assembly includes a lower plastic and an end cap. The lower plastic is formed with an air inlet part and an exhaust part, and an air passage is formed between the air inlet part and the exhaust part. The explosion-proof valve is arranged on the end cap and is arranged corresponding to the position of the exhaust part.

[0016] It can be analyzed from this that through the opening formed in the housing, an installation basis can be provided for the top cover assembly provided in this application. And because the lower plastic in the top cover assembly of this application is formed with an air inlet part and an exhaust part, and an air passage is formed between the air inlet part and the exhaust part, the explosion-proof valve is arranged on the end cap and is arranged corresponding to the position of the exhaust part. Therefore, when gas is generated in the receiving cavity, the gas can pass through from the air inlet part, flow through the air passage to the exhaust part, and then be discharged by the explosion-proof valve corresponding to the exhaust part, achieving the purpose of quickly discharging the gas generated during the use of the battery and ensuring the use safety of the battery.

[0017] In addition, the present utility model also provides a battery, including a battery cell and the above-mentioned housing structure, and the battery cell is arranged in the receiving cavity.

[0018] The battery adopting the housing structure provided by this application can timely discharge the gas generated in the receiving cavity during the use process, thereby ensuring pressure balance, avoiding the risk of failure or even explosion caused by the inability of the battery to exhaust and relieve pressure, and improving the safety performance of the battery. Description of the Drawings

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Exploded view of the housing structure provided by the embodiment of the present invention;

[0021] Figure 2 Structural diagram of the lower plastic in the housing structure provided by the embodiment of the present invention;

[0022] Figure 3 For Figure 2 Partial enlarged view of part A in

[0023] Figure 4 Cross-sectional view of the lower plastic in the housing structure provided by the embodiment of the present invention;

[0024] Figure 5 Internal view of the housing in the housing structure provided by the embodiment of the present invention.

[0025] In the figure: 1 - lower plastic; 101 - exhaust part; 1011 - second ventilation hole; 1012 - third ventilation hole; 102 - intake part; 1021 - first ventilation hole; 103 - main channel; 1031 - expansion part; 104 - branch channel; 105 - fourth ventilation hole; 2 - end cover; 3 - explosion-proof valve; 4 - housing; 401 - adsorption part. Specific embodiments

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of them. Usually, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application to be protected, but only represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0027] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the utility model product is usually placed during use. These 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 orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0028] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0029] In the description of the embodiments of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "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 directly connected or indirectly connected through an intermediate medium, and it can be the connection inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] As used herein, the term "and / or" includes any one of the related items listed and any combination of any two or more items.

[0031] For ease of description, spatial relationship terms such as "above...", "upper part", "below...", and "lower part" can be used here to describe the relationship between one element and another as shown in the drawings. Such spatial relationship terms are intended to include different orientations of the device during use or operation in addition to the orientation depicted in the drawings.

[0032] The terms used herein are only for describing various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. The terms "include", "comprise", and "have" list the stated features, quantities, operations, components, elements, and / or combinations thereof that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0033] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that occur during manufacturing.

[0034] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of this application. In addition, although the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of this application. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0035] As Figure 1 shown, the present utility model provides a housing structure, including a top cover assembly, an explosion-proof valve 3, and a housing 4; the housing 4 forms an open mouth, and the top cover assembly covers the open mouth and the housing 4 to form a receiving cavity; the top cover assembly includes a lower plastic 1 and an end cover 2, the lower plastic 1 is formed with an air inlet portion 102 and an exhaust portion 101, an air passage is formed between the air inlet portion 102 and the exhaust portion 101, the explosion-proof valve 3 is disposed on the end cover 2, and the explosion-proof valve 3 is disposed corresponding to the position of the exhaust portion 101.

[0036] Compared with the prior art, the housing structure provided by the present utility model has the following advantages:

[0037] For the housing structure provided by the present utility model, through the open mouth formed in the housing 4, an installation basis can be provided for the top cover assembly provided in this application. Moreover, since the lower plastic 1 in the top cover assembly of this application is formed with an air inlet portion 102 and an exhaust portion 101, and an air passage is formed between the air inlet portion 102 and the exhaust portion 101, the explosion-proof valve 3 is disposed on the end cover 2 and is disposed corresponding to the position of the exhaust portion 101. Therefore, when gas is generated in the receiving cavity, the gas can pass through from the air inlet portion 102, flow through the air passage to the exhaust portion 101, and then be discharged by the explosion-proof valve 3 corresponding to the exhaust portion 101, achieving the purpose of quickly discharging the gas generated during the use of the battery and ensuring the use safety of the battery.

[0038] Optionally, as Figure 2 shown, the air inlet portion 102 in this application is formed at both ends of the lower plastic 1, and the exhaust portion 101 is located between the air inlet portions 102 at both ends.

[0039] By forming intake portions 102 at both ends of the lower plastic 1, the exhaust area can be increased, further improving the exhaust efficiency of the gas in the housing 4. Moreover, since intake portions 102 are formed at both ends of the lower plastic 1, in this embodiment, the gas can find the shortest path to be exhausted, which can not only ensure the exhaust efficiency but also ensure the uniform stress of the lower plastic 1, thus ensuring the use safety of the overall battery.

[0040] Optionally, as Figure 2 shown, the gas passage includes a main passage 103 and a branch passage 104. There are multiple main passages 103, and both ends of the multiple main passages 103 are connected to the exhaust portion 101 and the intake portion 102, and the branch passage 104 is connected to the main passage 103 between the exhaust portion 101 and the intake portion 102.

[0041] It can be understood that both the main passage 103 and the branch passage 104 in this application are formed on the lower plastic 1 in the form of grooves. Therefore, when the end cover 2 is connected to the lower plastic 1, the end cover 2 can make the main passage 103 and the branch passage 104 on the lower plastic 1 form a relatively closed flow channel cavity, so that the gas will not escape and only flow in the channel.

[0042] Since there can be multiple main passages 103 in this application, and preferably, there are two main passages 103 between the intake portion 102 and the exhaust portion 101 at one end of this application. Therefore, the multiple main passages 103 can further enhance the gas flow capacity and accommodation area, enabling the gas to be exhausted more quickly. Moreover, since the branch passage 104 is also connected between the multiple main passages 103, the gas flow can be made more flexible through the branch passage 104, improving the gas exhaust efficiency.

[0043] Preferably, as Figure 2 combined with Figure 3 shown, expansion portions 1031 are formed at both ends of the main passage 103 in this application, and the expansion portions 1031 are in a trumpet shape. The end with a larger diameter of the expansion portion 1031 is connected to the corresponding intake portion 102 and exhaust portion 101.

[0044] Through the expansion portions 1031 respectively formed at both ends of the main passage 103, the gas entering from the intake portion 102 can more easily enter the main passage 103, and when being discharged into the exhaust portion 101, it has a larger discharge area, thereby being able to improve the gas flow efficiency and reduce the resistance.

[0045] Optionally, as Figure 2 shown, the intake portion 102 in this application is an intake groove, and a plurality of first ventilation holes 1021 are distributed in the intake groove.

[0046] Through the formed plurality of first ventilation holes 1021, the gas generated in the accommodation cavity can quickly enter the intake groove, and the gas can flow to the exhaust part 101 through the main channel 103 communicated with the intake groove. Moreover, the intake groove can increase the volume to a certain extent, thereby further improving the exhaust stability.

[0047] As Figure 2 shown, in the present application, the plurality of first ventilation holes 1021 are arranged at equal intervals along the width direction of the lower plastic 1. On the one hand, it can make the position of the lower plastic 1 corresponding to the intake part 102 receive uniform force. On the other hand, it can also make the gas enter the intake groove evenly.

[0048] Optionally, as Figure 1 combined with Figure 2 shown, the exhaust part 101 in the present application is an exhaust groove, and a plurality of second ventilation holes 1011 are distributed in the exhaust groove.

[0049] Since the exhaust part 101 is located between the intake parts 102 at both ends, and one exhaust part 101 corresponds to two intake parts 102, therefore, the exhaust part 101 in the present application requires a larger exhaust area. Therefore, the width of the exhaust groove in the present application is greater than the width of the intake groove, and preferably, as Figure 2 combined with Figure 3 shown, the exhaust groove in the present application can at least accommodate the arrangement of three columns of second ventilation holes 1011, so as to meet the matching of the intake air volume.

[0050] Correspondingly, through the plurality of second ventilation holes 1011 distributed in the exhaust groove, and the second ventilation holes 1011 are also communicated with the accommodation cavity. Therefore, during use, the gas generated near the exhaust part 101 can directly enter the exhaust part 101 through the second ventilation holes 1011 and be discharged by the explosion-proof valve 3, thereby further increasing the intake air volume and exhaust rate and improving the use stability of the overall battery.

[0051] The plurality of second ventilation holes 1011 in the present application are uniformly distributed in an array in the exhaust groove, so as to ensure uniform intake, reduce the manufacturing difficulty of the lower plastic 1, and improve the uniform force of the lower plastic 1.

[0052] Optionally, as Figures 2 - 4 shown, a plurality of third ventilation holes 1012 are formed at the junction of the exhaust groove and the lower plastic 1. The plurality of third ventilation holes 1012 are all in a funnel-shaped structure, and the diameter of the third ventilation hole 1012 on the side facing the end cover 2 is smaller than the diameter on the side facing the housing 4.

[0053] By forming a plurality of third air holes 1012 at the junction of the lower plastic 1 and the exhaust groove, and making the third air holes 1012 have a funnel-shaped structure, the air intake area can be further increased. In addition, since the diameter of the third air hole 1012 on the side facing the end cover 2 is smaller than the diameter on the side facing the shell 4 in the present application, the air intake end of the third air hole 1012 has a larger air intake diameter, thereby improving the air intake efficiency.

[0054] Alternatively, if Figure 2 Combination Figure 3 As shown, a plurality of fourth vent holes 105 are formed on both sides of the corresponding exhaust groove on the lower plastic 1 in the present application, and the fourth vent holes 105 on both sides of the exhaust groove are evenly distributed and arranged one by one.

[0055] Since the area of ​​the explosion-proof valve 3 is larger than that of the exhaust portion 101 , the air intake can be further increased by further forming a plurality of fourth vent holes 105 on both sides of the exhaust groove corresponding to the lower plastic 1 , and the gas flowing through the fourth vent holes 105 can be directly discharged from the explosion-proof valve 3 .

[0056] Correspondingly, by evenly distributing the fourth vent holes 105 on both sides, on the one hand, it is possible to ensure uniform air intake and uniform force, and on the other hand, it is also convenient for processing the lower plastic 1.

[0057] Alternatively, if Figure 5 As shown, the inner wall of the shell 4 in the present application is formed with a plurality of adsorption portions 401 , and the plurality of adsorption portions 401 are arranged in an array.

[0058] In the present application, multiple adsorption parts 401 are adsorption holes formed on the inner wall surface of the shell 4, and the adsorption holes are blind holes. After the battery is used for a certain period of time, the battery cell will expand. The adsorption part 401 can restrain the battery cell to a certain extent, thereby avoiding the battery cell from shaking inside the shell 4 to a certain extent and alleviating the impact on the top cover assembly.

[0059] Preferably, the multiple adsorption parts 401 in the present application are distributed in an array, and the distance between the adsorption parts 401 in the top row and the opening of the shell 4 is a, and the overall height of the shell 4 is A, satisfying 0.33A≤a≤0.67A.

[0060] Furthermore, the depth of the adsorption hole is W, and the wall thickness of the shell 4 is T, satisfying W=0.2T.

[0061] In addition, the utility model also provides a battery, comprising a battery core and the above-mentioned shell structure, wherein the battery core is arranged in the accommodating cavity.

[0062] The battery adopting the housing structure provided by the present application can timely discharge the gas generated in the accommodating cavity during use, thereby ensuring pressure balance, avoiding the risk of failures or even explosions caused by the inability of the battery to exhaust and relieve pressure, and improving the safety performance of the battery.

[0063] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A housing structure, characterized in that: It includes a top cover assembly, an explosion-proof valve and a housing; The shell forms an opening, and the top cover assembly covers the opening and forms a receiving cavity with the shell; The top cover assembly includes a lower plastic and an end cover, the lower plastic is formed with an air inlet portion and an exhaust portion, an air passage is formed between the air inlet portion and the exhaust portion, the explosion-proof valve is arranged on the end cover, and the explosion-proof valve is arranged corresponding to the position of the exhaust portion.

2. The housing structure according to claim 1, characterized in that: The air inlet is formed at two ends of the lower plastic, and the exhaust is located between the air inlet at the two ends.

3. The housing structure according to claim 2, characterized in that: The air passage includes a main passage and a branch passage. There are multiple main passages, and both ends of the multiple main passages are connected to the exhaust part and the intake part. The branch passage is connected to the main passage between the exhaust part and the intake part.

4. The housing structure according to claim 3, characterized in that: An expansion portion is formed at both ends of the main channel, and the expansion portion is trumpet-shaped, and the end of the expansion portion with a larger diameter is connected to the corresponding air inlet portion and the exhaust portion.

5. The housing structure according to claim 1, characterized in that: The air inlet portion is an air inlet groove, and a plurality of first air vents are distributed in the air inlet groove.

6. The housing structure according to claim 1, characterized in that: The exhaust portion is an exhaust groove, and a plurality of second vent holes are distributed in the exhaust groove.

7. The housing structure according to claim 6, characterized in that: A plurality of third vent holes are formed at the junction of the exhaust groove and the lower plastic, and the plurality of third vent holes are all funnel-shaped structures, and the diameter of the third vent holes on the side facing the end cover is smaller than the diameter on the side facing the shell.

8. The housing structure according to claim 6, characterized in that: A plurality of fourth vent holes are formed on both sides of the lower plastic corresponding to the exhaust groove, and the fourth vent holes on both sides of the exhaust groove are evenly distributed and arranged in one-to-one correspondence.

9. The housing structure according to claim 8, characterized in that: The inner wall of the shell is formed with a plurality of adsorption portions, and the plurality of adsorption portions are arranged in an array.

10. A battery, characterized in that: It comprises a battery core and a shell structure as described in any one of claims 1 to 9, wherein the battery core is arranged in the accommodating cavity.

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