Housing assembly and battery having the same

Abstract

The utility model provides a kind of shell assembly, including shell and pole post assembly. Shell has accommodating cavity, and shell is provided with through-hole;Pole post assembly is worn in through-hole, and pole post assembly includes compression ring, pole post and insulation sealing structure. Compression ring is located at the side of shell towards accommodating cavity;Pole post includes first cylinder, second cylinder and third cylinder, first cylinder is located at the side of shell towards accommodating cavity, and compression ring is arranged between first cylinder and shell, second cylinder is located at the side of shell away from accommodating cavity, and the outer circumferential dimension of first cylinder is less than the outer circumferential dimension of second cylinder;Third cylinder connects first cylinder and second cylinder, and third cylinder is worn in through-hole and compression ring;Insulation sealing structure is located between third cylinder and the hole wall of through-hole, and between compression ring and shell, and insulation sealing structure is interference fit with third cylinder, can improve the capacity of shell on the basis of not increasing the size of shell, to accommodate larger size battery cell, to improve the energy density of battery.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a housing assembly and a battery having the same. Background Technology

[0002] With the increasing development of electronic products, they are becoming smaller, which places higher demands on the size of batteries in battery products.

[0003] Batteries in related technologies typically include a casing, terminal assembly, and battery cell. The terminal assembly includes a portion located inside the casing, which takes up too much space inside the casing, reducing the size of the battery cell that the casing can accommodate. Utility Model Content

[0004] This utility model provides a housing assembly to solve the problem of excessive space occupied by the electrode assembly in the housing in related technologies, thereby increasing the size of the battery cell that the housing can accommodate.

[0005] The housing assembly of this utility model embodiment includes:

[0006] The housing has a receiving cavity and a through hole.

[0007] The electrode assembly is inserted and installed within the through hole, and the electrode assembly includes:

[0008] A pressure ring is disposed on the side of the housing facing the receiving cavity;

[0009] The electrode post includes a first post, a second post, and a third post. The first post is located on the side of the housing facing the receiving cavity, and a pressure ring is disposed between the first post and the housing. The second post is located on the side of the housing away from the receiving cavity, and the outer circumferential dimension of the first post is smaller than that of the second post. The third post connects the first post and the second post, and the third post passes through the through hole and the pressure ring. The outer circumferential dimension of the first post is larger than that of the third post.

[0010] An insulating sealing structure is provided between the third column and the wall of the through hole, and is located between the pressure ring and the housing. The insulating sealing structure is interference-fitted with the third column.

[0011] The housing assembly of this utility model uses an interference fit between the insulating sealing structure and the third post. On the one hand, this allows the third post and the insulating sealing structure to fit tightly, reducing the volume of the pole post assembly and thus reducing the space occupied by the pole post assembly inside the battery cell. On the other hand, after the third pole post is installed in the insulating sealing structure, it can be automatically positioned under the action of the insulating sealing structure, reducing the occurrence of installation errors and improving the assembly efficiency of the pole post assembly, thereby improving the assembly efficiency of the housing assembly of this utility model.

[0012] Therefore, the housing assembly of this utility model can increase the capacity of the housing without increasing the size of the housing, so as to accommodate larger-sized battery cells, thereby increasing the energy density of the battery.

[0013] Optionally, the insulating sealing structure includes an insulating gasket and a sealing gasket.

[0014] The insulating gasket is disposed between the outer periphery of the third column and the wall of the through hole, and is located between the housing and the second column;

[0015] The sealing gasket is arranged between the housing and the pressure ring, and the sealing gasket abuts against the side of the insulating gasket away from the second column.

[0016] Optionally, the insulating pad includes a first insulating sheet and a second insulating sheet connected together.

[0017] The first insulating sheet is disposed between the outer periphery of the third column and the wall of the through hole;

[0018] The second insulating sheet is disposed between the second column and the housing, and the projection of the outer edge of the second insulating sheet on the housing is located on the outer periphery of the through hole.

[0019] Optionally, the second insulating sheet has a first receiving groove on the side away from the housing, the first receiving groove being used to receive at least a portion of the second column.

[0020] Optionally, the outer perimeter of the first receiving groove is equal to the outer perimeter of the second column.

[0021] Optionally, the sealing gasket has a second receiving groove on the side away from the insulating gasket, the second receiving groove being used to receive at least a portion of the pressure ring.

[0022] Optionally, the outer circumferential dimension of the second receiving groove is equal to the outer diameter of the pressure ring.

[0023] Optionally, the sealing gasket is provided with an isolation member, which is spaced between the second column and the bottom of the receiving cavity; and the isolation member has a protective portion extending out of the end of the second column away from the second column, which is used to spacedly connect the tab of the second column and the bottom of the receiving cavity.

[0024] Optionally, the spacer is disposed on the side of the sealing gasket near the bottom of the receiving cavity;

[0025] The isolation member includes an isolation portion and a connecting portion, the isolation portion being spaced apart from the bottom of the receiving cavity; the projection of the second column in the direction of the isolation portion is located on the isolation portion, and a gap is formed between the second column and the end of the isolation portion away from the through hole; the protective portion is provided on the isolation portion;

[0026] The connecting portion is located at one end of the isolation portion near the through hole, and the connecting portion is fixedly connected to the sealing gasket.

[0027] This utility model also provides a battery.

[0028] The battery of this utility model embodiment includes the housing assembly as described in the above embodiment. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the housing assembly according to an embodiment of the present utility model;

[0031] Figure 2 This is a cross-sectional view of the housing assembly according to an embodiment of the present utility model;

[0032] Figure 3 yes Figure 2 A magnified view of part A in the middle.

[0033] In the picture:

[0034] 100. Housing assembly;

[0035] 1. Shell; 101. Receiving cavity; 102. Top cover; 103. Bottom shell; 104. Through hole;

[0036] 2. Terminal assembly;

[0037] 3. Pressure ring;

[0038] 4. Pole post; 401. First column; 402. Second column; 403. Third column;

[0039] 5. Insulated and sealed structure;

[0040] 501, Insulating gasket; 5011, First insulating sheet; 5012, Second insulating sheet; 50121, First receiving groove;

[0041] 502, sealing gasket; 5021, second receiving groove;

[0042] 6. Isolation component; 601. Isolation part; 602. Connecting part. Detailed Implementation

[0043] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0044] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal encapsulation of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] In order to solve the problem that the electrode assembly 2 occupies too much space inside the housing 1 in the relevant technology, the size of the battery cell that the housing 1 can accommodate is increased.

[0047] This utility model provides a housing assembly 100.

[0048] The housing assembly 100 of this utility model embodiment includes a housing 1 and a pole assembly 2.

[0049] The housing 1 has a receiving cavity 101 and a through hole 104. The pole assembly 2 is inserted into the through hole 104 and includes a pressure ring 3, a pole 4 and an insulating sealing structure 5.

[0050] The pressure ring 3 is located on the side of the housing 1 facing the receiving cavity 101;

[0051] The pole post 4 includes a first post 401, a second post 402, and a third post 403. The first post 401 is located on the side of the housing 1 facing the receiving cavity 101, and a pressure ring 3 is provided between the first post 401 and the housing 1. The second post 402 is located on the side of the housing 1 away from the receiving cavity 101. The outer circumferential dimension of the first post 401 is smaller than that of the second post 402. For example, when the first post 401 and the second post 402 are cylinders, the diameter of the first post 401 is smaller than the diameter of the second post 402. The third post 403 connects the first post 401 and the second post 402, and the third post 403 passes through the through hole 104 and the pressure ring 3.

[0052] The insulating sealing structure 5 is located between the third column 403 and the hole wall of the through hole 104, and between the pressure ring 3 and the housing 1, and between the second column 402 and the housing 1. The insulating sealing structure 5 is interference-fitted with the third column 403.

[0053] The housing assembly 100 of this utility model uses an interference fit between the insulating sealing structure 5 and the third column 403. On the one hand, this allows the third column 403 and the insulating sealing structure 5 to fit tightly, reducing the volume of the pole assembly 2 and thus reducing the space occupied by the pole assembly 2 inside the battery cell. On the other hand, after the third pole 4 is installed on the insulating sealing structure 5, it can be automatically positioned under the action of the insulating sealing structure 5, reducing the occurrence of installation errors and improving the assembly efficiency of the pole assembly 2, thereby improving the assembly efficiency of the housing assembly 100 of this utility model.

[0054] Therefore, the housing assembly 100 of this utility model embodiment can increase the capacity of the housing 1 without increasing the size of the housing 1, so as to accommodate larger-sized battery cells, thereby increasing the energy density of the battery.

[0055] The following is in conjunction with the appendix Figure 1-3 The housing assembly 100 of this utility model is described in an embodiment.

[0056] like Figure 1 As shown, the housing assembly 100 of this utility model embodiment includes a housing 1 and a pole assembly 2.

[0057] The housing 1 has a receiving cavity 101, such as Figure 1 As shown, the housing 1 includes an upper cover 102 and a lower housing 103. The upper cover 102 covers the lower housing 103 and defines a receiving cavity 101, which can be used to accommodate the battery cell and electrolyte.

[0058] Meanwhile, a through hole 104 is provided on the housing 1, such as Figure 1 As shown, a through hole 104 is provided on the side wall of the lower shell 103, and the pole post assembly 2 is installed through the through hole 104. The pole post assembly 2 includes a pressure ring 3, a pole post 4 and an insulating sealing structure 5.

[0059] The pressure ring 3 is located on the side of the housing 1 facing the receiving cavity 101, that is, the pressure ring 3 is located on the inner side of the housing 1.

[0060] The electrode post 4 includes a first post 401, a second post 402, and a third post 403. The first post 401 is located on the side of the pressure ring 3 away from the housing 1, and the second post 402 is located on the side of the housing 1 facing the receiving cavity 101. The outer circumferential dimension of the first post 401 is smaller than that of the second post 402. For example, when the first post 401 and the second post 402 are cylinders, the diameter of the first post 401 is smaller than the diameter of the second post 402. In other words, placing the larger part of the electrode post 4 on the outside of the housing 1 facilitates welding the second electrode post 4 to the external connector of the battery.

[0061] The third column 403 connects the first column 401 and the second column 402, and the third column 403 passes through the through hole 104 and the pressure ring 3;

[0062] An insulating sealing structure 5 is provided between the third column 403 and the hole wall of the through hole 104, and between the pressure ring 3 and the housing 1, and between the second column 402 and the housing 1. An insulating sealing structure 5 is provided between the pole post 4 and the housing assembly 100 and between the pressure ring 3 and the housing 1. The insulating sealing structure 5 can provide insulation and sealing between the pole post 4 and the housing assembly 100 and between the pressure ring 3 and the housing 1, thereby improving the insulation and sealing performance between the pole post 4 and the housing assembly 100 and between the pressure ring 3 and the housing 1.

[0063] Meanwhile, the insulating sealing structure 5 and the third column 403 are interference-fitted. On the one hand, this allows the third column 403 and the insulating sealing structure 5 to fit tightly, reducing the volume of the pole assembly 2 and thus reducing the space occupied by the pole assembly 2 inside the cell. On the other hand, after the third pole 4 is installed on the insulating sealing structure 5, it can be automatically positioned under the action of the insulating sealing structure 5, which can reduce the occurrence of installation errors and improve the assembly efficiency of the pole assembly 2, thereby improving the assembly efficiency of the housing assembly 100 in this embodiment of the present invention.

[0064] In some embodiments, the outer perimeter of the first column 401 is larger than the outer perimeter of the third column 403. For example, when the first column 401 and the third column 403 are cylinders, the diameter of the first column 401 is larger than the diameter of the third column 403.

[0065] By setting the outer perimeter of the first column 401 to be larger than that of the third column 403, the first column 401 can fix the pressure ring 3, thereby improving the firmness of the pressure ring 3.

[0066] In some embodiments, the insulating sealing structure 5 includes an insulating gasket 501 and a sealing gasket 502. The insulating gasket 501 is disposed between the outer periphery of the third column 403 and the wall of the through hole 104, and is located between the housing 1 and the second column 402. The sealing gasket 502 is disposed between the housing 1 and the pressure ring 3, and the sealing gasket 502 abuts against the side of the insulating gasket 501 away from the second column 402.

[0067] By configuring the insulating sealing structure 5 to include an insulating gasket 501 and a sealing gasket 502, that is, by configuring the insulating sealing structure 5 as a split structure and dividing it into two parts, it is easier to assemble the insulating sealing structure 5 and reduce the assembly difficulty of the insulating sealing structure 5.

[0068] Furthermore, the insulating pad 501 includes a first insulating sheet 5011 and a second insulating sheet 5012 connected together. The first insulating sheet 5011 is disposed between the outer periphery of the third column 403 and the hole wall of the through hole 104; the second insulating sheet 5012 is disposed between the second column 402 and the housing 1, and the projection of the outer edge of the second insulating sheet 5012 on the housing 1 is located on the outer periphery of the through hole 104.

[0069] The second insulating sheet 5012 is disposed between the pressure ring 3 and the housing 1, and the projection of the outer edge of the second insulating sheet 5012 on the housing 1 is located on the outer periphery of the through hole 104. That is to say, the outer periphery of the second insulating sheet 5012 is larger than the outer periphery of the through hole 104. For example, when the second insulating sheet 5012 is a circular gasket and the through hole 104 is a circular through hole, the outer diameter of the second insulating sheet 5012 is larger than the diameter of the through hole 104.

[0070] In some embodiments, the second insulating sheet 5012 is provided with a first receiving groove 50121 on the side away from the housing 1. The first receiving groove 50121 is used to receive at least a portion of the second column 402. That is, the first receiving groove 50121 can receive a portion of the second column 402 or it can receive all of the second column 402. In other words, the depth of the first receiving groove 50121 is less than the thickness of the second column 402.

[0071] Furthermore, the outer circumferential dimensions of the first receiving groove 50121 are equal to the outer circumferential dimensions of the second column 402. For example, when the first receiving groove 50121 is a circular groove and the pressure ring 3 is a circular ring, the diameter of the first receiving groove 50121 is equal to the outer diameter of the pressure ring 3.

[0072] By setting the outer periphery of the first receiving groove 50121 to be equal to the outer periphery of the second column 402, the inner periphery of the first receiving groove 50121 abuts against the outer periphery of the pressure ring 3, so that the first receiving groove 50121 can limit the second column 402 and prevent the second column 402 from being misaligned in the first receiving groove 50121.

[0073] In some embodiments, the sealing gasket 502 is provided with a spacer 6, which is spaced between the second column 402 and the bottom of the receiving cavity 101; and the spacer 6 has a protective portion extending out of the end of the second column 402 away from the second column 403, which is used to be spaced between the tab of the second column 402 and the bottom of the receiving cavity 101.

[0074] The housing assembly 100 of this utility model embodiment can prevent the second column 402 from contacting the bottom of the receiving cavity 101 by setting the isolation member 6, and can also prevent the tabs on the battery cell connected to the second column 402 from contacting the bottom of the receiving cavity 101. That is, it can prevent the second column 402 and the tabs connected to the second column 402 from contacting the housing 1, which would cause a short circuit in the battery and improve the safety performance of the battery.

[0075] In some embodiments, the spacer 6 is disposed on the side of the sealing gasket 502 near the bottom of the receiving cavity 101;

[0076] The isolation member 6 includes an isolation portion 601 and a connecting portion 602. The isolation portion 601 is spaced apart from the bottom of the receiving cavity 101. The projection of the second column 402 in the direction of the isolation portion 601 is located on the isolation portion 601, and a gap is formed between it and the end of the isolation portion 601 away from the through hole 104. A protective portion is provided on the isolation portion 601.

[0077] The connecting part 602 is located at one end of the isolation part 601 near the through hole 104, and the connecting part 602 is fixedly connected to the sealing gasket 502.

[0078] The separator 6 has a simple structure, which simplifies the manufacturing process and ensures the reliability of the spacing between the second column 402, the tab and the housing 1, thus avoiding short circuits caused by contact between the tab and the housing.

[0079] This utility model also provides a battery.

[0080] The battery of this utility model embodiment includes the housing assembly 100 of the above embodiment.

[0081] By providing the housing assembly 100 of the above embodiment, the energy density of the battery in this utility model embodiment can be improved.

[0082] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A housing assembly, characterized in that, include: The housing (1) has a receiving cavity (101) and a through hole (104) is provided on the housing (1). A pole post assembly (2) is installed through the through hole (104), and the pole post assembly (2) includes: A pressure ring (3) is provided on the side of the housing (1) facing the receiving cavity (101); The pole post (4) includes a first post (401), a second post (402), and a third post (403). The first post (401) is located on the side of the housing (1) facing the receiving cavity (101), and the pressure ring (3) is provided between the first post (401) and the housing (1). The second post (402) is located on the side of the housing (1) away from the receiving cavity (101). The outer circumferential dimension of the first post (401) is smaller than that of the second post (402). The third post (403) connects the first post (401) and the second post (402). The third post (403) passes through the through hole (104) and the pressure ring (3). The outer circumferential dimension of the first post (401) is larger than that of the third post (403). An insulating sealing structure (5) is provided between the third column (403) and the hole wall of the through hole (104), and is located between the pressure ring (3) and the housing (1). The insulating sealing structure (5) is interference-fitted with the third column (403).

2. The housing assembly according to claim 1, characterized in that, The insulating sealing structure (5) includes an insulating gasket (501) and a sealing gasket (502). The insulating pad (501) is arranged between the outer periphery of the third column (403) and the through hole (104), and is located between the housing (1) and the second column (402); The sealing gasket (502) is arranged between the housing (1) and the pressure ring (3), and the sealing gasket (502) abuts against the side of the insulating gasket (501) away from the second column (402).

3. The housing assembly according to claim 2, characterized in that, The insulating pad (501) includes a first insulating sheet (5011) and a second insulating sheet (5012) connected together. The first insulating sheet (5011) is disposed between the outer periphery of the third column (403) and the wall of the through hole (104); The second insulating sheet (5012) is disposed between the second column (402) and the housing (1), and the projection of the outer edge of the second insulating sheet (5012) on the housing (1) is located on the outer periphery of the through hole (104).

4. The housing assembly according to claim 3, characterized in that, The second insulating sheet (5012) has a first receiving groove (50121) on the side away from the housing (1), the first receiving groove (50121) is used to receive at least part of the second column (402).

5. The housing assembly according to claim 4, characterized in that, The outer perimeter of the first receiving groove (50121) is equal to the outer perimeter of the second column (402).

6. The housing assembly according to claim 2, characterized in that, The sealing gasket (502) has a second receiving groove (5021) on the side away from the insulating gasket (501), the second receiving groove (5021) being used to receive at least a portion of the pressure ring (3).

7. The housing assembly according to claim 6, characterized in that, The outer circumferential dimensions of the second receiving groove (5021) are equal to the outer circumferential dimensions of the pressure ring (3).

8. The housing assembly according to any one of claims 2-7, characterized in that, The sealing gasket (502) is provided with an isolation member (6), which is spaced between the second column (402) and the bottom of the receiving cavity (101); and the isolation member (6) has a protective part extending out of the second column (402) away from the second column (403), which is used to be spaced between the tab of the second column (402) and the bottom of the receiving cavity (101).

9. The housing assembly according to claim 8, characterized in that, The isolation element (6) is located on the side of the sealing gasket (502) near the bottom of the receiving cavity (101); The isolation member (6) includes an isolation portion (601) and a connecting portion (602). The isolation portion (601) is spaced apart from the bottom of the receiving cavity (101). The projection of the second column (402) in the direction of the isolation portion (601) is located on the isolation portion (601), and a gap is formed between it and the end of the isolation portion (601) away from the through hole (104). The protective portion is provided on the isolation portion (601). The connecting part (602) is disposed at one end of the isolation part (601) near the through hole (104), and the connecting part (602) is fixedly connected to the sealing gasket (502).

10. A battery, characterized in that, Includes the housing assembly (100) as described in any one of claims 1-9.

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