Shell structure and power battery

Abstract

The present invention discloses a shell structure and a power battery, and relates to the technical field of power batteries. The shell structure includes a shell, a seal and a pole. The shell defines a receiving cavity, and a mounting hole is provided on the shell. The seal fits into the mounting hole, one end of the seal extends into the receiving cavity, and is bent along the radial outer side of the mounting hole to abut against the shell. The pole is inserted into the seal, one end of the pole extends into the receiving cavity, and is bent along the radial outer side of the mounting hole to abut against the seal. The shell structure is installed in the shell only through the pole and the seal, which can significantly reduce the types and quantities of parts without affecting the performance of the shell structure, reduce the production cost of the product, and does not require welding processing, which can improve the reliability of the pole when fixed on the shell, thereby improving the performance of the shell structure. In addition, since there is no metal welding slag generated by welding processing, the safety of the use of the shell structure can be ensured.

Description

Technical Field

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

[0002] When installing the pole, existing batteries often need to set up multiple sealing structures to better ensure the sealed installation of the pole on the battery shell or end cover. However, multiple sealing structures tend to lengthen the battery assembly process and the number of parts, increasing the production cost of the battery. At the same time, in order to ensure the sealing effect, welding is often used in the prior art, but metal welding slag is inevitably retained inside the battery during the welding process, which is not only difficult to clean, but also more likely to cause harm to the safety of the battery.

[0003] Therefore, there is an urgent need for a shell structure and a power battery that can reduce the production cost of the shell and improve the safety of the shell structure. Summary of the invention

[0004] An object of the present invention is to provide a shell structure that can reduce the production cost of the shell and improve the safety of the shell structure.

[0005] Another object of the present invention is to provide a power battery that can reduce the production cost of the power battery and improve the safety of the power battery.

[0006] In order to achieve the above technical effects, the technical solution of the present invention is as follows:

[0007] A shell structure comprises: a shell defining a receiving cavity and having a mounting hole; a sealing member, the sealing member being fitted in the mounting hole, one end of the sealing member extending into the receiving cavity and being bent along the radial outer side of the mounting hole to abut against the shell; a pole, the pole being passed through the sealing member, one end of the pole extending into the receiving cavity and being bent along the radial outer side of the mounting hole to abut against the sealing member.

[0008] Furthermore, the pole comprises: a body, which is inserted into the seal; a bending portion, which is arranged at one end of the body and located in the accommodating cavity, and the bending portion abuts against the seal along the radial outer side of the mounting hole.

[0009] Furthermore, the bending portion and the sealing member are riveted to the shell.

[0010] Furthermore, a bending crack is provided between the bending portion and the main body.

[0011] Furthermore, the width of the bending crack gradually decreases in a direction toward the other end of the body.

[0012] Furthermore, an end surface of the body is provided with an electrical connection surface, and before the pole is riveted, an annular groove is provided between the bent portion and the electrical connection surface.

[0013] Furthermore, the distance between the top wall of the bending portion and the shell is smaller than the distance between the end of the body and the shell.

[0014] Furthermore, the pole also includes a first sealing flange abutting against the seal and / or the outer side of the housing.

[0015] Further, the sealing member includes a second sealing flange abutting against the outer side of the housing.

[0016] A power battery comprises the shell structure described above.

[0017] One beneficial effect of the present invention is that by placing the seal against the shell, a stable connection between the seal and the shell can be achieved, and by placing the pole against the seal, a stable connection between the pole and the seal can be achieved, thereby enabling the pole and the seal to be stably and reliably fixed on the shell, thereby achieving a stable and reliable installation of the pole on the shell. The shell structure of this embodiment is installed in the shell only by the pole and the seal, which can significantly reduce the types and quantities of parts without affecting the performance of the shell structure, thereby reducing both the consumable cost of the product and the assembly process of the product, thereby further reducing the production cost of the product. At the same time, both the seal and the pole can be fixed on the shell by fastening processes such as riveting, so that there is no need to use welding processing, which can improve the reliability of the pole when it is fixed on the shell, thereby improving the performance of the shell structure. In addition, since there is no metal welding slag generated by welding processing, the cleaning process of the shell structure can be avoided, and the metal welding slag can be prevented from damaging the telecommunication pole group in the accommodating cavity, thereby ensuring the safety of the shell structure.

[0018] Another beneficial effect of the present invention is that the power battery according to the present invention, because it has the shell structure described above, can reduce the production cost of the power battery and improve the safety of the power battery.

[0019] 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

[0020] Figure 1 It is one of the internal structure schematic diagrams of the housing structure provided in the specific embodiment of the present invention;

[0021] Figure 2 yes Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0022] Figure 3 It is a schematic diagram of the internal structure of a pole before riveting provided by a specific embodiment of the present invention;

[0023] Figure 4 This is the second schematic diagram of the internal structure of the shell structure provided in the specific embodiment of the present invention.

[0024] Reference numerals

[0025] 1. housing; 11. accommodating chamber; 12. second sealing protrusion;

[0026] 2. sealing member; 21. second sealing flange;

[0027] 3. Pole; 31. Body; 32. Bending portion; 33. Bending crack; 34. Annular groove; 35. First sealing flange; 36. First sealing protrusion. DETAILED DESCRIPTION

[0028] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] 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 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 the description of the present invention, unless otherwise specified, "multiple" means two or more. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] Reference below Figure 1-Figure 4 The specific structure of the housing structure according to the embodiment of the present invention is described.

[0033] like Figure 1-Figure 4 As shown, Figure 1 A housing structure is disclosed, which includes a shell 1, a seal 2 and a pole 3. The shell 1 defines a receiving cavity 11, and a mounting hole is provided on the shell 1. The seal 2 is fitted in the mounting hole, one end of the seal 2 extends into the receiving cavity 11, and is bent along the radial outer side of the mounting hole to abut against the shell 1. The pole 3 is inserted into the seal 2, one end of the pole 3 extends into the receiving cavity 11, and is bent along the radial outer side of the mounting hole to abut against the seal 2.

[0034] It can be understood that by pressing the seal 2 against the housing 1, the seal 2 can be firmly connected to the housing 1, and by pressing the pole 3 against the seal 2, the pole 3 and the seal 2 can be firmly connected, thereby making the pole 3 and the seal 2 firmly and reliably fixed to the housing 1, thereby realizing the firmly and reliably installed pole 3 on the housing 1. The housing structure of this embodiment is installed in the housing 1 only by the pole 3 and the seal 2, which can significantly reduce the types and quantities of parts without affecting the performance of the housing structure, thereby reducing the consumables cost of the product and the assembly process of the product, thereby further reducing the production cost of the product. At the same time, the seal 2 and the pole 3 can be fixed to the housing 1 by fastening processes such as riveting, so that there is no need to use welding processing, which can improve the reliability of the pole 3 when it is fixed on the housing 1, thereby improving the performance of the housing structure. In addition, since there is no metal welding slag generated by welding processing, the cleaning process of the housing structure can be avoided, and the metal welding slag can be prevented from damaging the electric pole group in the accommodating cavity 11, thereby ensuring the safety of the use of the housing structure.

[0035] In some embodiments, Figure 2 and Figure 4As shown, the pole 3 includes a body 31 and a bent portion 32. The body 31 is inserted into the seal 2. The bent portion 32 is disposed at one end of the body 31 and is located in the accommodating cavity 11. The bent portion 32 abuts against the seal 2 along the radial outer side of the mounting hole.

[0036] It is understandable that after the pole 3 is divided into the body 31 and the bent portion 32 , it is convenient for the operator to bend the bent portion 32 against the seal 2 , thereby facilitating a stable connection between the pole 3 and the housing 1 through the seal 2 .

[0037] In some embodiments, Figure 2 and Figure 4 As shown, the bent portion 32 and the sealing member 2 are riveted to the housing 1 .

[0038] It is understandable that, since the ends of the bending portion 32 and the sealing member 2 are both located in the accommodating chamber 11, it is convenient for the operator to rivet the sealing member 2 and the bending portion 32 to the main body 31 from within the accommodating chamber 11 at the same time, which not only ensures the stability of the connection between the bending portion 32 and the shell 1, but also better ensures that the bending portion 32 and the shell 1 achieve better sealing performance through the squeezed sealing member 2. In addition, since the riveting is performed from within the accommodating chamber 11, the bottom wall of the shell 1 can be kept horizontal during the riveting process, thereby avoiding the bending of the shell 1 during the riveting process and ensuring the processing quality of the outer shell structure. It should be noted that during the riveting process of the bending portion 32 and the sealing member 2, it is possible to Figure 2 As shown, when the seal 2 squeezes the housing 1 and the housing 1 does not deform, the riveting is stopped. Figure 4 As shown, the riveting is stopped after the seal 2 squeezes the shell 1 and the shell 1 is deformed. Both can achieve a good riveting effect. The specific structure after riveting can be determined according to actual needs without specific limitation.

[0039] In some embodiments, Figure 2 and Figure 4 As shown, a bending crack 33 is provided between the bending portion 32 and the body 31 .

[0040] It is understandable that the bending crack 33 can facilitate the operator to rivet the bending portion 32 using a riveting tool, and can also ensure that the bending portion 32 will not damage the body 31 during the riveting process, thereby better ensuring the normal function of the pole 3.

[0041] In some embodiments, Figure 2 and Figure 4 As shown, the width of the bending crack 33 gradually decreases in the direction toward the other end of the body 31 .

[0042] It can be understood that, through the above-mentioned structural setting, the bending portion 32 can be firmly connected to the shell 1 while still maintaining a firmly connected relationship with the main body 31, thereby preventing the bending portion 32 from being disconnected from the main body 31 during the riveting process, thereby ensuring the connection quality of the pole 3 on the shell 1.

[0043] In some embodiments, Figure 3 As shown, the end surface of the body 31 is provided with a power-connecting surface, and before the pole 3 is riveted, an annular groove 34 is provided between the bent portion 32 and the power-connecting surface.

[0044] It can be understood that in this embodiment, the power contact surface is the top surface of the body 31. Since an annular groove 34 is provided between the bent portion 32 and the power contact surface, it can further ensure that the riveting tool will not damage the power contact surface of the body 31, further ensuring the normal and reliable use of the pole 3.

[0045] In some embodiments, Figure 2 and Figure 4 As shown, the distance between the top wall of the bent portion 32 and the housing 1 is smaller than the distance between the end of the body 31 and the housing 1 .

[0046] It can be understood that, through the above-mentioned structural setting, the problem of the main body 31 being limited by the bent portion 32 when cooperating with the battery cell pole group after riveting is completed can be prevented, thereby better ensuring the normal application of the pole 3, improving the assembly yield of the shell structure, and reducing its overall production cost.

[0047] In some embodiments, Figure 2 and Figure 4 As shown, the pole 3 further comprises a first sealing flange 35 abutting against the outer side of the seal 2 and / or the housing 1. The seal 2 comprises a second sealing flange 21 abutting against the outer side of the housing 1.

[0048] It can be understood that the first sealing flange 35 and the second sealing flange 21 can facilitate the sealed connection among the pole 3, the sealing member 2 and the mounting member.

[0049] In some embodiments, the bending portion 32 is disposed around the body 31. It is understandable that the bending portion 32 disposed around the body 31 can further improve the connection stability and sealing performance of the bending portion 32 and the housing 1 when riveted.

[0050] In some embodiments, Figure 2-Figure 4As shown, the pole 3 is also provided with a first sealing protrusion 36, and the housing 1 is provided with a second sealing protrusion 12. It can be understood that, since the pole 3 is provided with the first sealing protrusion 36, when the pole 3 abuts against the bottom wall of the seal 2, the first sealing protrusion 36 will squeeze the seal 2, which can not only effectively press the seal 2 on the mounting member by squeezing the seal 2 to improve the sealing between the seal 2 and the mounting member, but also improve the sealing effect between the pole 3 and the seal 2 by the squeezing effect between the first sealing protrusion 36 and the seal 2, so that the sealing performance of the pole 3 on the mounting member can be better guaranteed, and the battery electrolyte in the mounting member is prevented from overflowing from the connecting hole, thereby ensuring the safety of the power battery. In addition, since the first sealing protrusion 36 is additionally provided, there is no need to set up other welding structures, which can reduce the number of parts and improve the assembly efficiency of the power battery, thereby reducing the production cost of the power battery. In addition, since the power battery of this embodiment does not need to be sealed by welding, no metal welding slag will adhere to the mounting parts, which not only avoids the slag removal process, but also avoids the safety problems caused by the metal welding slag inside the power battery, thereby improving the safety of the power battery.

[0051] The present invention also discloses a power battery having the shell structure mentioned above.

[0052] The power battery according to the embodiment of the present invention has the shell structure described above, which can reduce the production cost of the power battery and improve the safety of the power battery.

[0053] Example:

[0054] Reference below Figure 1-Figure 4 The housing structure of a specific embodiment of the present invention is described.

[0055] The housing structure of this embodiment includes a housing 1, a seal 2 and a pole 3. The housing 1 defines a housing cavity 11, and a mounting hole is provided on the housing 1. The seal 2 is fitted in the mounting hole, one end of the seal 2 extends into the housing cavity 11, and is bent along the radial outer side of the mounting hole to abut against the housing 1. The pole 3 is inserted into the seal 2, one end of the pole 3 extends into the housing cavity 11, and is bent along the radial outer side of the mounting hole to abut against the seal 2.

[0056] The pole 3 includes a body 31 and a bent portion 32. The body 31 is inserted into the seal 2. The bent portion 32 is provided at one end of the body 31 and is located in the accommodating cavity 11, and the bent portion 32 abuts against the seal 2 along the radial outer side of the mounting hole. The bent portion 32 and the seal 2 are riveted to the shell 1. A bending crack 33 is provided between the bent portion 32 and the body 31. The width of the bending crack 33 gradually decreases in the direction toward the other end of the body 31. The end face of the body 31 is provided with a power connection surface, and before the pole 3 is riveted, an annular groove 34 is provided between the bent portion 32 and the power connection surface. The distance between the top wall of the bent portion 32 and the shell 1 is smaller than the distance between the end of the body 31 and the shell 1. The pole 3 also includes a first sealing flange 35 abutting against the outer side of the seal 2 and / or the shell 1. The seal 2 includes a second sealing flange 21 abutting against the outer side of the shell 1. The pole 3 is further provided with a first sealing protrusion 36 , and the housing 1 is provided with a second sealing protrusion 12 .

[0057] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0058] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A housing structure, characterized in that: include: A housing (1), the housing (1) defining a receiving cavity (11), and a mounting hole being provided on the housing (1); A sealing member (2), the sealing member (2) being fitted in the mounting hole, one end of the sealing member (2) extending into the accommodating cavity (11) and being bent along the radial outer side of the mounting hole to abut against the housing (1); A pole (3), the pole (3) being inserted into the sealing member (2), one end of the pole (3) extending into the accommodating cavity (11) and being bent along the radial outer side of the mounting hole to abut against the sealing member (2); The pole (3) comprises: A body (31), the body (31) being inserted into the sealing element (2); a bent portion (32), the bent portion (32) being arranged at one end of the body (31) and located in the accommodating cavity (11), the bent portion (32) being abutted against the sealing member (2) along the radial outer side of the mounting hole; A bending crack (33) is provided between the bending portion (32) and the main body (31); The distance between the top wall of the bent portion (32) and the shell (1) is smaller than the distance between the end of the body (31) and the shell (1).

2. The housing structure according to claim 1, characterized in that: The bent portion (32) and the sealing component (2) are riveted to the housing (1).

3. The housing structure according to claim 1, characterized in that: The width of the bending crack (33) gradually decreases in a direction towards the other end of the body (31).

4. The housing structure according to claim 2, characterized in that: An end surface of the body (31) is provided with an electrical connection surface, and before the pole (3) is riveted, an annular groove (34) is provided between the bent portion (32) and the electrical connection surface.

5. The housing structure according to claim 1, characterized in that: The pole (3) further comprises a first sealing flange (35) abutting against the seal (2) and / or the outer side of the housing (1).

6. The housing structure according to claim 1, characterized in that: The seal (2) comprises a second sealing flange (21) abutting against the outer side of the housing (1).

7. A power battery, characterized in that: The invention comprises the housing structure according to any one of claims 1 to 6.

Images