Battery assembly

Abstract

The invention discloses a battery assembly. The battery assembly comprises a battery body, a pole, a shell, an insulating part and a sealing part, wherein the pole is arranged at the end part of the battery body; a cavity for accommodating the battery body is formed in the shell, and a through hole suitable for a pole to pass through is formed at one end of the shell; the insulating part surrounds at least part of the periphery of the pole and is located between the shells, and the insulating part is provided with a gas guide groove for communicating the cavity with the outside; and the sealing piece is arranged between the insulating piece and the pole to seal the air guide groove. According to the battery assembly, the gas guide groove is formed in the insulating part, gas generated in the battery assembly can be exhausted in time through the gas guide groove, the helium detection precision of the battery assembly can be improved, whether the battery assembly is provided with a sealing part or not can be judged conveniently, and the machining quality of the battery assembly is improved.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a battery assembly. Background Art

[0002] Currently, the positive terminals of cylindrical batteries on the market usually use a combination of plastic and positive pole to insulate the positive pole from the steel shell. However, in the actual production process, the plastic has a certain sealing effect, which makes it impossible to discharge internal gas and effectively identify the actual effect of the internal sealing ring, which will affect the detection of battery quality. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a battery assembly. According to the battery assembly of the present invention, a gas guide groove is provided on the insulating member, and the gas guide groove can discharge the gas generated in the battery assembly in time, and can improve the accuracy of the helium inspection of the battery assembly, facilitate the judgment of whether the battery assembly is equipped with a seal, and improve the processing quality of the battery assembly.

[0004] The battery assembly according to the present invention comprises: a battery body, a pole, a shell, an insulating member and a sealing member, wherein the pole is arranged at the end of the battery body; a cavity for accommodating the battery body is formed in the shell, and a through hole suitable for the pole to pass through is formed at one end of the shell; the insulating member surrounds at least part of the outer circumference of the pole and is located between the shell and the shell, and an air guide groove is provided on the insulating member to connect the cavity with the outside; the sealing member is arranged between the insulating member and the pole to close the air guide groove.

[0005] The air guide groove connects the cavity with the outside world. During the production process of the battery assembly, the air tightness of the battery assembly can be detected to determine whether the battery assembly is equipped with a seal. For example, in the high-speed production process, the battery assembly is usually tested for sealing performance of the shell assembly by helium inspection. In the related technology, since the insulating member can play a sealing role, if the seal is not installed at this time, it will also cause the test result to show normal, but in fact such a battery assembly is unqualified. For the battery of the present invention, since the air guide groove is set on the insulating member, if the test result shows that the air tightness is abnormal, that is, the gas can directly flow out of the battery assembly during the helium inspection, it can be judged that the battery assembly is unqualified and needs to be reassembled; if the test result shows that the air tightness is good, it means that the seal is assembled and the battery assembly is qualified. Therefore, the setting of the air guide groove can improve the accuracy of the detection during the production process of the battery assembly and improve the quality of the battery assembly.

[0006] According to an embodiment of the present invention, the shell includes a cylinder and a top cover, the cavity is formed in the cylinder; the top cover is arranged at one end of the cylinder, and the through hole is formed on the top cover.

[0007] According to one embodiment of the present invention, the pole includes: a main body, a first matching portion and a second matching portion, the main body passes through the through hole; the first matching portion is arranged around the radial outer periphery of one axial end of the main body and is located on one side of the top cover; the second matching portion is arranged at the other axial end of the main body and is located on the other side of the top cover.

[0008] According to an embodiment of the present invention, the insulating member includes: a first insulating member and a second insulating member, wherein the first insulating member is disposed between the top cover and the first matching portion; and the second insulating member is disposed between the top cover and the second matching portion.

[0009] According to an embodiment of the present invention, at least one of the first insulating member and the second insulating member is provided with the air guide groove extending in the radial direction.

[0010] According to one embodiment of the present invention, the width of the air guide groove is d, the depth is h, and the following conditions are satisfied: 0.5 mm ≤ d ≤ 2 mm, 0.05 mm ≤ h ≤ 0.5 mm.

[0011] According to one embodiment of the present invention, the first insulating member includes: a bearing portion and a flange portion, the bearing portion is sleeved on at least a portion of the outer periphery of the main body portion, a bearing surface for supporting the first matching portion is formed on the bearing portion, and an installation gap suitable for accommodating the seal is formed between the radial inner periphery of the bearing portion and the main body portion; the flange portion is arranged on the radial outer periphery of the bearing portion, the flange portion extends in the axial direction of the main body portion and stops at the radial outer periphery of the first matching portion.

[0012] According to one embodiment of the present invention, a first air guide groove extending radially is provided on the bearing portion, and the first air guide groove connects the outside with the installation gap; a second air guide groove extending radially is formed on the side of the second insulating member close to the top cover, and the second air guide groove connects the cavity with the installation gap.

[0013] According to an embodiment of the present invention, a matching bevel is formed on the radial inner periphery of the bearing portion and is inclined toward the radial outer end of the top cover in the axial direction of the main body portion, and the matching bevel is spaced from the main body portion to define the installation gap.

[0014] According to an embodiment of the present invention, a plurality of limiting protrusions protruding toward the pole are arranged on the radial inner circumference of the bearing portion, and the plurality of limiting protrusions are arranged at intervals in the circumferential direction of the bearing portion.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is an exploded view of a battery assembly according to one embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of a first insulating member according to an embodiment of the present invention;

[0019] Figure 3 is a cross-sectional view of a first insulating member according to an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of a second insulating member according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] Battery assembly 1;

[0023] Battery body 11;

[0024] The pole 12, the body portion 121, the first matching portion 122, and the second matching portion 123;

[0025] Shell 13, cylinder 131, top cover 132;

[0026] A first insulating member 141, a bearing portion 1411, a flange portion 1412, a matching inclined surface 1413, a limiting protrusion 1414, and a second insulating member 142;

[0027] Seal 15;

[0028] The first air guiding groove 161 and the second air guiding groove 162 . DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] Currently, the positive terminals of cylindrical batteries on the market usually use a combination of plastic and positive pole to insulate the positive pole from the steel shell. However, in the actual production process, the plastic has a certain sealing effect, which makes it impossible to discharge internal gas and effectively identify the actual effect of the internal sealing ring, which will affect the detection of battery quality.

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

[0032] The battery assembly 1 according to the present invention comprises: a battery body 11, a pole 12, a shell 13, an insulating member and a sealing member 15, wherein the pole 12 is arranged at the end of the battery body 11; a cavity for accommodating the battery body 11 is formed in the shell 13, and a through hole suitable for the pole 12 to pass through is formed at one end of the shell 13; the insulating member surrounds at least part of the outer circumference of the pole 12 and is located between the shells 13 and 13, and an air guide groove is provided on the insulating member to connect the cavity with the outside; the sealing member 15 is arranged between the insulating member and the pole 12 to close the air guide groove.

[0033] According to the battery assembly 1 of the present invention, a shell 13 is provided, and a cavity for accommodating a battery body 11 is formed in the shell 13. The battery body 11 is accommodated in the cavity, and the shell 13 can isolate the battery body 11 from the external environment, thereby providing protection for the battery body 11; the pole 12 is provided at the end of the battery body 11 and extends out of the cavity through a through hole at one end of the shell 13, so as to be connected with an external circuit; the provision of the insulating member and the sealing member 15 can respectively play the role of insulation and sealing, thereby ensuring the safety and reliability of the battery assembly 1; the various components are closely matched and the structure is compact, thereby ensuring the integrity and stability of the battery assembly 1.

[0034] The insulating member is provided with an air guide groove, which connects the cavity with the outside world, and helps to discharge the gas generated inside the battery assembly 1 in time, preventing the internal pressure from increasing due to gas accumulation, thereby improving the safety performance of the battery assembly 1. The sealing member 15 is provided between the insulating member and the pole 12, effectively sealing the air guide groove, preventing external impurities such as moisture and dust from entering the battery assembly 1, and ensuring the sealing performance and service life of the battery assembly 1.

[0035] The air guide groove connects the cavity with the outside world. During the production process of the battery assembly 1, the air tightness of the battery assembly 1 can be detected to determine whether the battery assembly 1 is equipped with the seal 15. For example, in the high-speed production process, the battery assembly 1 is usually tested for the sealing performance of the shell 13 assembly by helium inspection. In the related technology, since the insulating part can play a sealing role, if the seal 15 is not installed at this time, it will also cause the test result to be normal, but in fact such a battery assembly 1 is unqualified. For the battery of the present invention, since the air guide groove is set on the insulating part, if the test result shows that the air tightness is abnormal, that is, the gas can directly flow out of the battery assembly 1 during the helium inspection, it can be judged that the battery assembly 1 is unqualified and needs to be reassembled; if the test result shows that the air tightness is good, it means that the seal 15 is assembled and the battery assembly 1 is qualified. Therefore, the setting of the air guide groove can improve the accuracy of the detection during the production process of the battery assembly 1 and improve the quality of the battery assembly 1.

[0036] In some embodiments, the air guide groove may be a square groove and is located on the outer surface of the insulating member.

[0037] According to one embodiment of the present invention, the shell 13 includes a barrel 131 and a top cover 132, wherein a cavity is formed in the barrel 131; the top cover 132 is disposed at one end of the barrel 131, and a through hole is formed on the top cover 132. The shell 13 is composed of the barrel 131 and the top cover 132, and this design makes the structure of the shell 13 clearer and easier to manufacture and assemble. At the same time, the separation design of the barrel 131 and the top cover 132 also facilitates subsequent maintenance and replacement work. A through hole is formed on the top cover 132, and the pole 12 can pass through the through hole to extend out of the cavity, which facilitates the connection of the pole 12 with the external circuit.

[0038] According to one embodiment of the present invention, the pole 12 includes: a main body portion 121, a first matching portion 122 and a second matching portion 123, the main body portion 121 passes through the through hole; the first matching portion 122 is arranged around the radial outer periphery of one axial end of the main body portion 121 and is located on one side of the top cover 132; the second matching portion 123 is arranged at the other axial end of the main body portion 121 and is located on the other side of the top cover 132.

[0039] The pole 12 is composed of a main body 121, a first matching portion 122 and a second matching portion 123. The design of the three parts makes the assembly of the pole 12 more stable and reliable. Specifically: when the pole 12 is assembled to the shell 13, the first matching portion 122 and the second matching portion 123 are respectively located on both sides of the top cover 132 and are respectively limited by the top cover 132. The main body 121 and the shell 13 are firmly connected through the first matching portion 122 and the second matching portion 123, thereby improving the overall stability and safety of the battery assembly 1.

[0040] According to one embodiment of the present invention, the insulating member includes: a first insulating member 141 and a second insulating member 142, wherein the first insulating member 141 is disposed between the top cover 132 and the first matching portion 122; and the second insulating member 142 is disposed between the top cover 132 and the second matching portion 123. During assembly, the first insulating member 141 is disposed between the first matching portion 122 and the top cover 132, so as to avoid direct contact between the first matching portion 122 and the top cover 132; similarly, the second insulating member 142 is disposed between the second matching portion 123 and the top cover 132, so as to avoid direct contact between the second matching portion 123 and the top cover 132. The provision of the first insulating member 141 and the second insulating member 142 can effectively achieve electrical isolation and prevent current from flowing in an unnecessary path, thereby improving the safety and stability of the battery assembly 1. In addition, the insulating member is usually a flexible member, which can serve as a protective layer to protect the pole 12 and the top cover 132 from mechanical damage and corrosion. During the use of the battery assembly 1 , the pole 12 and the top cover 132 may be corroded by the external environment or affected by mechanical stress, and the presence of the insulating member can effectively reduce the impact of these factors and extend the service life of the battery assembly 1 .

[0041] According to one embodiment of the present invention, at least one of the first insulating member 141 and the second insulating member 142 is provided with a gas guide groove extending in the radial direction. The second insulating member 142 is located inside the housing 13, and the first insulating member 141 is located outside the housing 13. The battery assembly 1 is provided with a gas guide groove on at least one of the first insulating member 141 and the second insulating member 142, so that the gas guide groove can connect the inside of the cavity with the outside, so that the gas generated in the battery assembly 1 can be discharged from the battery in time, and the expansion explosion caused by the inability to discharge the gas in the battery assembly 1 can be avoided, thereby improving the safety of the battery assembly 1.

[0042] During actual processing, the air guide groove can be provided on the first insulating member 141 or the second insulating member 142 , or the air guide groove can be provided on both the first insulating member 141 and the second insulating member 142 .

[0043] According to one embodiment of the present invention, the width of the air guide groove is d, the depth is h, and they satisfy: 0.5mm≤d≤2mm, 0.05mm≤h≤0.5mm. When the depth of the air guide groove is greater than 0.5mm or the width is greater than 2mm, during the assembly process of the shell 13, the insulating part is easily cracked by force, and the NG rate increases; when the depth of the air guide groove is less than 0.05mm or the width is less than 0.5mm, after the shell 13 is assembled, the insulating part is deformed by force, and at this time, the air guide groove is easily filled with the deformed insulating part; therefore, in actual processing, the depth h of the air guide groove can preferably range from 0.05 to 0.5mm, and the width d can preferably range from 0.5 to 2mm.

[0044] According to one embodiment of the present invention, the first insulating member 141 includes: a bearing portion 1411 and a flange portion 1412, the bearing portion 1411 is sleeved on at least a portion of the outer periphery of the main body portion 121, a bearing surface for supporting the first matching portion 122 is formed on the bearing portion 1411, and an installation gap suitable for accommodating the sealing member 15 is formed between the radial inner periphery of the bearing portion 1411 and the main body portion 121; the flange portion 1412 is arranged on the radial outer periphery of the bearing portion 1411, and the flange portion 1412 extends in the axial direction of the main body portion 121 and stops at the radial outer periphery of the first matching portion 122.

[0045] like Figure 1-Figure 3 As shown, the first insulating member 141 is provided with a bearing portion 1411 and a flange portion 1412. The bearing portion 1411 is sleeved on at least part of the outer periphery of the main body portion 121 (a part of the pole 12), and provides a bearing surface for supporting the first matching portion 122, thereby ensuring the stability and position accuracy of the first matching portion 122 during the assembly process, and effectively dispersing the force on the first matching portion 122 through the bearing surface, thereby improving the overall structural strength of the battery assembly 1. An installation gap suitable for accommodating the sealing member 15 is formed between the radial inner periphery of the bearing portion 1411 and the main body portion 121, and the sealing member 15 can be assembled in the installation gap, effectively preventing external moisture, dust and other impurities from entering the interior of the battery assembly 1, thereby improving the sealing performance and waterproof and dustproof level of the battery assembly 1.

[0046] The flange portion 1412 is arranged on the radial outer periphery of the bearing portion 1411 and extends in the axial direction of the main body portion 121. During assembly, the flange portion 1412 can abut against the radial outer periphery of the first matching portion 122, which not only enhances the connection strength between the first insulating member 141 and the first matching portion 122, but also effectively prevents the first matching portion 122 from loosening and displacement during the assembly process through the abutting effect of the flange portion 1412, thereby improving the assembly accuracy and stability of the battery assembly 1.

[0047] According to one embodiment of the present invention, a first air guide groove 161 extending radially is provided on the bearing portion 1411, and the first air guide groove 161 connects the outside with the installation gap; a second air guide groove 162 extending radially is formed on one side of the second insulating member 142 close to the top cover 132, and the second air guide groove 162 connects the cavity with the installation gap.

[0048] The first air guide groove 161 provided on the bearing portion 1411 and the second air guide groove 162 provided on the second insulating member 142 together form an air flow channel. During the battery charging and discharging process, a certain amount of gas may be generated, resulting in an increase in internal pressure. At this time, the gas generated inside the battery assembly 1 can enter the installation gap through the second air guide groove 162, and then enter the first air guide groove 161 from the installation gap and be discharged to the outside, thereby balancing the internal pressure of the battery assembly 1, preventing the battery assembly 1 from being damaged due to excessive internal pressure, and improving the safety of the battery. In addition, both the first air guide groove 161 and the second air guide groove 162 extend in the radial direction, which can reduce the axial length of the insulating member and avoid unnecessary waste of materials.

[0049] According to one embodiment of the present invention, the radial inner periphery of the bearing portion 1411 is formed with a matching bevel 1413 which is inclined in the axial direction of the main body portion 121 toward the radial outer end of the top cover 132, and the matching bevel 1413 and the main body portion 121 are spaced apart to define an installation gap. During assembly, the seal 15 is deformed and compressed by force, and the seal 15 is squeezed and gradually fills the installation gap. The design of the matching upper can increase the installation gap and provide more deformation space for the deformation of the seal 15; at the same time, when the seal 15 is deformed to a certain amount, it can contact the position of the matching bevel 1413 close to the first air guide groove 161. At this time, the seal 15 can disconnect the connection between the first air guide groove 161 and the second air guide groove 162 to ensure the sealing of the battery assembly 1. During actual assembly, the matching bevel 1413 can preferably be 45°.

[0050] According to one embodiment of the present invention, a plurality of limiting protrusions 1414 protruding toward the pole 12 are provided on the radial inner circumference of the bearing portion 1411, and the plurality of limiting protrusions 1414 are arranged at intervals in the circumferential direction of the bearing portion 1411. The limiting protrusions 1414 can improve the structural strength of the first insulating member 141, and can also enhance the stability of the first insulating member 141 and the pole 12. During assembly, the limiting protrusions 1414 and the first matching portion 122 are interference-fitted, so that the assembly of the pole 12 and the first insulating member 141 is more stable, thereby improving the overall stability of the battery assembly 1.

[0051] In some embodiments, the interference between the limiting protrusion 1414 and the first mating portion 122 can preferably range from 0.02 mm to 0.1 mm. Too small an interference cannot satisfy the fixing effect, and too large an interference may easily lead to failure to assemble, or cracking of the first insulating member 141 or rebound of the pole 12. Therefore, the preferred interference may be 0.03 mm.

[0052] In some embodiments, the air guide grooves may be in the form of holes, and the holes may be disposed within the insulating member rather than on the surface area of ​​the insulating member, resulting in a more aesthetically pleasing appearance and greater outer surface strength.

[0053] In the description of the present invention, 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 invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0054] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0055] In the description of the present invention, "plurality" means two or more.

[0056] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0057] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", 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 invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery assembly, characterized in that: include: Battery body; A pole, the pole being arranged at an end of the battery body; A shell, wherein a cavity for accommodating the battery body is formed in the shell, and a through hole suitable for the pole to pass through is formed at one end of the shell; An insulating member, the insulating member surrounds at least a portion of the outer circumference of the pole and is located between the shells, and the insulating member is provided with an air guide groove connecting the cavity with the outside; A sealing member is disposed between the insulating member and the pole to seal the air guide groove.

2. The battery assembly according to claim 1, characterized in that: The housing comprises: A cylinder, wherein the cavity is formed in the cylinder; A top cover is arranged at one end of the cylinder, and the through hole is formed on the top cover.

3. The battery assembly according to claim 2, characterized in that: The pole comprises: a main body portion, the main body portion passing through the through hole; A first matching portion, which is disposed around a radial outer periphery of one axial end of the main body and is located on one side of the top cover; The second matching portion is arranged at the other axial end of the main body and located at the other side of the top cover.

4. The battery assembly according to claim 3, characterized in that: The insulating member comprises: A first insulating member, the first insulating member is disposed between the top cover and the first matching portion; A second insulating member is disposed between the top cover and the second matching portion.

5. The battery assembly according to claim 4, characterized in that: At least one of the first insulating member and the second insulating member is provided with the air guide groove extending in the radial direction.

6. The battery assembly according to claim 5, characterized in that: The width of the air guide groove is d, and the depth is h, and the following conditions are satisfied: 0.5mm≤d≤2mm, 0.05mm≤h≤0.5mm.

7. The battery assembly according to claim 6, characterized in that: The first insulating member comprises: A bearing portion, the bearing portion being sleeved on at least a portion of the outer circumference of the main body portion, the bearing portion being formed with a bearing surface for supporting the first matching portion, and a mounting gap suitable for accommodating the sealing member being formed between the radial inner circumference of the bearing portion and the main body portion; The flange portion is arranged on the radial outer periphery of the bearing portion, and the flange portion extends in the axial direction of the main body portion and stops at the radial outer periphery of the first matching portion.

8. The battery assembly according to claim 7, characterized in that: The bearing portion is provided with a first air guide groove extending radially, and the first air guide groove connects the outside with the installation gap; the second insulating member is formed with a second air guide groove extending radially on one side close to the top cover, and the second air guide groove connects the cavity with the installation gap.

9. The battery assembly according to claim 7, characterized in that: A matching inclined surface inclined toward the radial outer end of the top cover in the axial direction of the main body is formed on the radial inner periphery of the bearing portion, and the matching inclined surface is spaced from the main body to define the installation gap.

10. The battery assembly according to claim 9, characterized in that: A plurality of limiting protrusions protruding toward the pole are arranged on the radial inner circumference of the bearing portion, and the plurality of limiting protrusions are arranged at intervals in the circumferential direction of the bearing portion.

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