Shell structure and battery

Abstract

The invention relates to the technical field of batteries, in particular to a shell structure and a battery, the shell structure comprises a shell body, an insulating part and an insulating protective cover, the shell body is provided with a liquid injection hole penetrating through the side wall of the shell body in the first direction, and the insulating part is attached to one side of the side wall, where the liquid injection hole is located, of the shell body; the insulating protective cover is fixedly connected with the side, back to the shell body, of the insulating part, and the insulating protective cover covers the liquid injection hole. According to the shell structure and the battery provided by the invention, when the battery is filled with electrolyte through the liquid injection hole, on one hand, the insulating part and the cover part are fixedly connected, so that the setting stability of the insulating protective cover can be effectively ensured; and on the other hand, through the blocking effect of the insulating protective cover, the internal structure of the battery can be effectively prevented from being in contact with the cover part through the liquid injection hole, and the insulating comprehensiveness of the insulating part to the cover part is ensured.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a shell structure and a battery. Background Art

[0002] During the battery filling process, negative pressure usually occurs inside the battery shell at the filling hole, and the structure inside the battery shell (for example, the tabs, electrical connectors, etc.) is very likely to block the filling hole under the action of negative pressure airflow, which not only affects the discharge of excess electrolyte from the filling hole, but also easily causes the structure inside the shell to overlap with the exposed part of the cover near the filling hole, causing the cover to leak electricity and even cause the battery to short-circuit. This greatly affects the safety of the operation of negative pressure sucking out excess electrolyte in the battery. Summary of the invention

[0003] The purpose of this application is to provide a shell structure and a battery, which can solve the problem that during the battery filling process, negative pressure usually occurs inside the battery shell at the filling hole, and the structure inside the battery shell (for example, the pole ear, the electrical connection piece, etc.) is very easy to block the filling hole under the action of the negative pressure airflow, which not only affects the discharge of excess electrolyte from the filling hole, but also easily causes the structure inside the shell to overlap with the exposed part of the cover near the filling hole, causing the cover to leak electricity and even causing the battery to short-circuit. This greatly affects the technical problem of the safety of the operation of negative pressure sucking out excess electrolyte in the battery.

[0004] According to the first aspect of the present application, a shell structure is provided, including a shell body, an insulating member and an insulating protective cover, the shell body is provided with an injection hole penetrating the side wall of the shell body along a first direction, the insulating member is attached to one side of the side wall of the shell body where the injection hole is located, the insulating protective cover is fixedly connected to the side of the insulating member facing away from the shell body, and the insulating protective cover is arranged on the injection hole.

[0005] Preferably, the insulating protective cover is provided with a liquid-passing hole penetrating the insulating protective cover; The shell body comprises a shell portion and a cover portion which are buckled with each other, and the injection hole is arranged on the shell portion and / or the cover portion.

[0006] Preferably, the insulating member and the insulating protective cover are both detachably connected.

[0007] Preferably, one of the insulating member and the insulating protective cover is provided with a claw, and the other of the insulating member and the insulating protective cover is provided with a slot, and the insulating member and the insulating protective cover are both engaged via the claw and the slot.

[0008] Preferably, the number of both the clamping claws and the clamping grooves is plural, the plurality of the clamping claws are arranged at intervals along the circumference of the liquid injection hole, and the clamping grooves are arranged corresponding to the clamping claws.

[0009] Preferably, the number of the claws is defined as n, the effective bearing area of ​​the claws acting on the inner wall of the slot when the insulating protective cover and the insulating member are in an assembled state is S, the shear strength of the claws is B, and the projected area of ​​the insulating protective cover obtained by projecting along the first direction onto a plane perpendicular to the first direction is ,in, .

[0010] Preferably, when the claw and the slot are in a state of being engaged with each other, the effective depth of the claw extending into the slot along the extension direction of the slot is T, wherein 0.3 mm ≤ T ≤ 3 mm; The depth of the card slot is L, wherein 10%≤T / L≤150%.

[0011] Preferably, the insulating protective cover comprises a surrounding wall and a retaining wall, the surrounding wall extends along the first direction and is arranged around the injection hole; The blocking wall and the shell body are spaced apart along the first direction, and the surrounding wall connects the blocking wall and the insulating member.

[0012] Preferably, the liquid passage hole comprises: a first through hole, penetrating the insulating protective cover along the first direction and arranged opposite to the injection hole along the first direction, wherein the aperture of the first through hole is greater than or equal to the aperture of the injection hole; A second through hole, at least a portion of which passes through the surrounding wall.

[0013] According to the second aspect of the present application, a battery is provided, comprising a shell structure as described in any of the above technical solutions, and thus having all the beneficial technical effects of the shell structure, which will not be described in detail herein.

[0014] Compared with the prior art, the beneficial effects of this application are: The shell structure provided in the present application is arranged at the injection hole through an insulating protective cover fixedly connected to the side of the insulating member facing away from the cover portion. In this way, when the battery is filled with electrolyte through the injection hole, on the one hand, the fixed connection between the insulating member and the cover portion can effectively ensure the stability of the setting of the insulating protective cover; on the other hand, through the barrier effect of the insulating protective cover, it can effectively prevent the internal structure of the battery (for example, the pole ear, the electrical connecting piece, etc.) from contacting the cover portion through the injection hole, thereby ensuring the comprehensive insulation of the insulating member to the cover portion.

[0015] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of an exploded structure of a shell structure provided in an embodiment of the present application; Figure 2 for Figure 1 An enlarged schematic diagram of the shell structure at position A is provided; Figure 3 A schematic diagram of another partial structure of the housing structure provided in an embodiment of the present application; Figure 4 A schematic diagram of the axonometric structure of the housing structure provided in an embodiment of the present application; Figure 5 for Figure 4 An enlarged schematic diagram of the shell structure at position B is provided; Figure 6 A schematic cross-sectional view of a housing structure provided in an embodiment of the present application; Figure 7 for Figure 6 An enlarged schematic diagram of the shell structure at position C is provided.

[0018] Reference numerals: 1-cover; 11-liquid injection hole; 12-pole; 2-insulating member; 20-insulating fitting portion; 21-claw; 211-claw hook; 212-claw arm; 22-limiting protrusion; 3-insulating protective cover; 31-enclosing wall; 32-blocking wall; 33-liquid passage hole; 331-first through hole; 332-second through hole; 34-slot.

[0019] F1-first direction; F2-second direction; F3-third direction. DETAILED DESCRIPTION

[0020] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0021] The components of the embodiments of the present application generally described and shown in the drawings herein 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 application claimed, but merely represents the selected embodiments of the present application.

[0022] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0023] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] Refer to the following Figures 1 to 7 The shell structure and the battery according to some embodiments of the present application are described.

[0026] See also Figures 1 to 7 As shown, an embodiment of the first aspect of the present application provides a shell structure, which includes a shell body, an insulating part 2 and an insulating protective cover 3. The shell body is provided with an injection hole 11 that penetrates the side wall of the shell body along a first direction F1. The insulating part 2 is attached to one side of the side wall of the shell body where the injection hole 11 is located. The insulating protective cover 3 is fixedly connected to the side of the insulating part 2 that is away from the shell body, and the insulating protective cover 3 is covered on the injection hole.

[0027] According to the shell structure provided by the above-mentioned technical features, an insulating protective cover fixedly connected to the side of the insulating part 2 facing away from the shell body is arranged at the injection hole 11. In this way, when the battery is filled with electrolyte through the injection hole 11, on the one hand, the fixed connection between the insulating part 2 and the shell body can effectively ensure the stability of the setting of the insulating protective cover 3; on the other hand, through the blocking effect of the insulating protective cover 3, it can effectively prevent the internal structure of the battery (for example, the pole ear, the electrical connecting piece, etc.) from contacting the shell body through the injection hole 11, thereby ensuring the comprehensive insulation of the shell body by the insulating part 2.

[0028] Preferably, the shell body may include a shell portion and a cover portion 1 , and the shell portion and the cover portion 1 are buckled together to enclose and form a closed space for accommodating the electrode group.

[0029] Preferably, if Figures 1 to 7 As shown, the figure shows an example in which the above-mentioned liquid injection hole 11 is arranged on the cover part 1. In other words, the above-mentioned insulating member 2 can be attached to one side of the cover part 1.

[0030] However, it is not limited to this. As not shown in the figure, the above-mentioned injection hole can also be arranged on the side wall of the shell. Correspondingly, the insulating member can also be attached to one side of the side wall where the injection hole of the shell is located.

[0031] like Figures 1 to 7 As shown, the above-mentioned shell structure will be described in detail below by taking the liquid injection hole 11 being provided on the cover 1 as an example.

[0032] like Figures 1 to 7 As shown, F1 shown in the figure may be an example of the first direction F1. For the convenience of description, two directions perpendicular to the first direction F1 and intersecting each other are defined as a second direction F2 and a third direction F3. Figures 1 to 7 As shown, the figure shows an example of the above-mentioned shell structure being applicable to square batteries. In other words, the above-mentioned cover 1 is a rectangular plate-shaped structure, but is not limited to this. As long as the structure of the insulating protective cover 3 is provided to prevent the internal structure of the battery from contacting the cover 1 through the injection hole 11, the above-mentioned shell structure can also be applicable to batteries of other shapes, for example, cylindrical batteries or other special-shaped batteries.

[0033] Preferably, if Figures 1 to 7 As shown, the second direction F2 and the third direction F3 can be perpendicular to each other. Correspondingly, the first direction F1 can be the length direction of the square battery, the second direction F2 can be the width direction of the square battery, and the third direction F3 can be the thickness direction of the battery in the above directions, so as to use most square battery structures.

[0034] Preferably, if Figures 1 to 5As shown, the above-mentioned insulating protective cover 3 can be provided with a liquid passing hole 33 penetrating the insulating protective cover 3 to prevent the insulating protective cover 3 from interfering with the liquid injection of the liquid injection hole 11.

[0035] Preferably, if Figures 1 to 5 As shown, the liquid passage hole 33 may include a first through hole 331 , which may penetrate the insulating protective cover 3 along the first direction F1 , and the first through hole 331 is arranged opposite to the liquid injection hole 11 along the first direction F1 to further ensure the smoothness of liquid injection of the liquid injection hole 11 .

[0036] Preferably, if Figure 7 As shown, the aperture of the first through hole 331 can be greater than or equal to the aperture of the injection hole 11. On the one hand, the injection smoothness of the injection hole 11 is further improved; on the other hand, the impact of the electrolyte on the insulating protective cover 3 during the injection process is effectively reduced, and the setting stability of the insulating protective cover 3 and the insulating part 2 is improved.

[0037] Preferably, if Figure 1 , Figure 2 and Figure 5 As shown, the insulating protective cover 3 may include a surrounding wall 31 and a retaining wall 32, the surrounding wall 31 may extend along the first direction F1, and the surrounding wall 31 may be arranged around the injection hole 11. The retaining wall 32 and the cover 1 may be spaced apart along the first direction F1, and the surrounding wall 31 may connect the insulating member 2 and the retaining wall 32 to achieve the connection between the protective insulating cover and the insulating member 2.

[0038] Preferably, if Figures 1 to 5 As shown, the above-mentioned liquid hole 33 can also include a second through hole 332, and at least a portion of the second through hole 332 can pass through the above-mentioned surrounding wall 31. In this way, when the internal structure of the battery blocks the first through hole 331 under the action of air pressure or hydraulic pressure, the second through hole 332 can maintain the smoothness of liquid injection of the injection hole 11.

[0039] In an embodiment, preferably, Figures 1 to 3 As shown, the insulating member 2 and the insulating protective cover 3 can be detachably connected, so that, on the one hand, the replaceability of the insulating protective cover 3 is ensured; on the other hand, the insulating member 2 and the insulating protective cover 3 can be manufactured independently, reducing the manufacturing difficulty.

[0040] Preferably, if Figures 1 to 3 As shown, the insulating member 2 is provided with a claw 21, and the insulating protective cover 3 is provided with a slot 34, and the insulating member 2 and the insulating protective cover 3 are both engaged via the claw 21 and the slot 34. However, it is not limited thereto, as long as the insulating member 2 and the insulating protective cover 3 can be engaged, as not shown in the figure, the claw can also be provided on the insulating protective cover 3, and the slot can be provided on the insulating member.

[0041] Preferably, if Figure 2 and Figure 3 As shown, the number of both the above-mentioned claws 21 and the slots 34 is multiple, and the multiple claws 21 are arranged at intervals along the circumference of the injection hole 11, and the slots 34 are arranged corresponding to the claws 21, so as to ensure the connection stability between the insulating protective cover 3 and the insulating member 2.

[0042] like Figure 7 As shown, the above-mentioned claw 21 may include a claw arm 212 and a claw hook 211 connected to each other, the claw arm 212 extends along the first direction F1, and the claw hook 211 is fixedly arranged at the end of the claw arm 212 away from the cover portion 1. In the radial direction of the above-mentioned injection hole 11, the above-mentioned claw hook 211 protrudes relative to the claw arm 212, so as to extend into the slot 34 along the radial direction of the injection hole 11 through at least a portion of the claw hook 211, so as to realize the limitation of the position of the claw 21 in the first direction F1 by the slot 34.

[0043] Preferably, if Figures 1 to 7 As shown, the above-mentioned slot 34 can be arranged on the above-mentioned surrounding wall 31 , and the slot 34 can extend along the radial direction of the injection hole 11 to adapt to the structure of the surrounding wall 31 surrounding the injection hole 11 .

[0044] Preferably, if Figure 1 , Figure 2 and Figure 7 As shown, in the radial direction of the injection hole 11, the claw hook 211 can be arranged on the side of the claw arm 212 facing away from the injection hole 11, so that the claw 21 can be engaged with the insulation protection cover 3 from the inner side of the insulation protection cover 3 to ensure the stability of the arrangement of the claw 21 and prevent the claw 21 from scratching the internal structure of the battery.

[0045] However, it is not limited to this. Figure 3 As shown, in the radial direction of the injection hole 11, the claw hook 211 can be arranged on the side of the claw arm 212 facing away from the injection hole 11, so that the claw 21 can be engaged with the insulation protection cover 3 from the outside of the insulation protection cover 3 to effectively reduce the space occupancy rate of the insulation protection cover 3. Preferably, when in the radial direction of the injection hole 11, the claw hook 211 can be arranged on the side of the claw arm 212 facing away from the injection hole 11, and a groove extending along the first direction F1 is provided on the outer wall of the insulation protection cover 3, and the groove can be connected with the clamping groove 34, so that when the claw 21 is engaged with the insulation protection cover 3, the claw 21 can be embedded in the groove, so that the claw 21 is hidden in the groove, thereby effectively preventing the claw 21 from scratching the internal structure of the battery.

[0046] Preferably, , wherein the number of claws 21 included in the first clamping portion is defined as n, when the insulating protective cover 3 and the insulating member 2 are in the assembled state, the effective bearing area of ​​the claws 21 acting on the inner wall of the slot 34 is S, the shear strength of the claws 21 is B, and the projected area obtained by projecting the insulating protective cover 3 along the first direction F1 onto a plane perpendicular to the first direction F1 is .

[0047] It should be noted that Figure 7 Taking the position shown as an example, when the insulating shield 3 and the insulating member 2 are in the assembled state, the effective bearing area S of the claw 21 acting on the inner wall of the slot 34 can be understood as the area of ​​the overlapped portion between the upper surface of the claw hook 211 and the inner wall of the slot 34. The projected area of ​​the insulating shield 3 obtained by projecting the first direction F1 onto a plane perpendicular to the first direction F1 is It can be understood as the area of ​​the remaining portion of the baffle wall 32 excluding the liquid passage hole 33 .

[0048] Refer to Table 1, which shows that the insulation protection cover 3 of different sizes is made into batteries of the same specification, and after the liquid injection operation is performed, the connection between the insulation protection cover 3 and the insulation member 2 is disassembled and observed.

[0049] Table 1:

[0050] From Table 1, it can be seen that when the protective cover meets Even under the impact of the electrolyte, the insulating protective cover 3 and the insulating member 2 can be stably connected, and the insulating protective cover 3 will not fall off and cause damage to the electrode group. When the insulating protective cover 3 is detached from the insulating member 2 to varying degrees under the impact of the electrolyte, the electrode group is damaged by the detached insulating protective cover 3 .

[0051] Preferably, if Figure 7 As shown, when the claw 21 and the slot 34 are in a state of being engaged with each other, the claw 21 extends into the slot 34 along the extension direction of the slot 34 (i.e., the radial direction of the injection hole 11) to an effective depth (i.e., Figure 7 The t value shown is 0.3 mm to 3 mm, which not only ensures the clamping stability of the clamping claw 21 and the clamping slot 34, but also facilitates the assembly operation of the clamping claw 21 and the insulating protective cover 3. It should be noted that the effective depth here can be understood as the size of the portion of the clamping claw 21 that extends into the clamping slot 34 and overlaps with the clamping slot 34.

[0052] Preferably, as shown in Table 2 and Figure 7As shown, the depth of the above-mentioned slot 34 is L mm, and the effective depth of the claw 21 inserted into the slot 34 is t mm, wherein 10%≤t / L≤150%.

[0053] Table 2:

[0054] As can be seen from Table 2, when the size of the claw 21 and the slot 34 satisfies 10%≤t / L, the clamping stability between the claw 21 and the slot 34 can be effectively guaranteed, and the claw 21 can be effectively prevented from being dislocated. However, when the size of the claw 21 and the slot 34 reaches t / L≥150%, although the claw 21 can be prevented from being dislocated, the claw 21 is too long to be installed in the slot 34, resulting in assembly difficulties.

[0055] Preferably, if Figure 7 As shown, the above-mentioned slot 34 can penetrate the above-mentioned surrounding wall 31 along the radial direction of the injection hole 11 to ensure that the hook can be fully extended into the slot 34, so as to reduce the clamping stress of the claw 21 when it is in the assembled state with the insulating protective cover 3, and reduce the probability of the claw 21 being broken.

[0056] Preferably, if Figure 6 As shown, the size of the insulating protective cover 3 in the first direction F1 is less than or equal to the maximum distance of the insulating member 2 in the first direction F1 (in other words, the size of the insulating protective cover 3 in the first direction F1 is less than or equal to the limiting protrusion 22 described below) to prevent the insulating protective cover 3 from interfering with the pole group and damaging the pole group.

[0057] Alternatively, if Figure 1 , Figure 4 and Figure 6 As shown, the cover 1 may also be provided with a pole 12 .

[0058] Preferably, if Figure 6 As shown, the insulating member 2 may include an insulating fitting portion 20 and a limiting protrusion 22. The insulating fitting portion 20 is attached to one side of the cover 1 to achieve insulation between the cover 1 and the inside of the battery. The claw 21 and the limiting protrusion 22 may be fixed to the same side of the insulating fitting portion 20. The limiting protrusion 22 is the portion of the insulating member 2 with the maximum distance in the first direction F1, so that when the insulating member 2 is assembled in the battery, the limiting protrusion 22 abuts against the electrode group in the battery to limit the position of the electrode group in the first direction F1.

[0059] Optionally, the insulating fitting portion 20, the limiting protrusion 22 and the claw 21 can be integrally connected by injection molding.

[0060] The embodiment of the second aspect of the present application further provides a battery, comprising the shell structure described in any of the above embodiments, and thus having all the beneficial technical effects of the shell structure, which will not be repeated here.

[0061] Preferably, although not shown in the figures, when the pole group and the cover are in an assembled state, part of the insulating member abuts against the pole group, so as to limit the pole group through the insulating member.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A housing structure, characterized in that: The invention comprises a shell body, an insulating member (2) and an insulating protective cover (3); the shell body is provided with a liquid injection hole (11) penetrating the side wall of the shell body along a first direction (F1); the insulating member (2) is attached to one side of the side wall of the shell body where the liquid injection hole (11) is located; the insulating protective cover (3) is fixedly connected to the side of the insulating member (2) facing away from the shell body; and the insulating protective cover (3) is arranged to cover the liquid injection hole (11).

2. The housing structure according to claim 1, characterized in that: The insulating protective cover (3) is provided with a liquid passage hole (33) penetrating the insulating protective cover (3); The shell body comprises a shell portion and a cover portion (1) which are buckled together, and the liquid injection hole is arranged on the shell portion and / or the cover portion (1).

3. The housing structure according to claim 2, characterized in that: The insulating member (2) and the insulating protective cover (3) are detachably connected.

4. The housing structure according to claim 3, characterized in that: One of the insulating member (2) and the insulating protective cover (3) is provided with a clamping claw (21), and the other of the insulating member (2) and the insulating protective cover (3) is provided with a clamping groove (34); the insulating member (2) and the insulating protective cover (3) are clamped together via the clamping claw (21) and the clamping groove (34).

5. The housing structure according to claim 4, characterized in that: Both the clamping claws (21) and the clamping grooves (34) are multiple in number, the multiple clamping claws (21) are arranged at intervals along the circumference of the liquid injection hole (11), and the clamping grooves (34) are arranged corresponding to the clamping claws (21).

6. The housing structure according to claim 5, characterized in that: The number of the claws (21) is defined as n, when the insulating protective cover (3) and the insulating member (2) are in an assembled state, the effective bearing area of ​​the claws (21) acting on the inner wall of the slot (34) is defined as S, the shear strength of the claws (21) is defined as B, and the projected area of ​​the insulating protective cover (3) obtained by projecting the insulating protective cover (3) along the first direction (F1) onto a plane perpendicular to the first direction (F1) is defined as ,in, .

7. The housing structure according to claim 5, characterized in that: When the claw (21) and the slot (34) are in a state of being engaged with each other, the effective depth of the claw (21) extending into the slot (34) along the extension direction of the slot (34) is T, wherein 0.3 mm ≤ T ≤ 3 mm; The depth of the card slot (34) is L, wherein 10%≤T / L≤150%.

8. The housing structure according to claim 2, characterized in that: The insulating protective cover (3) comprises a surrounding wall (31) and a retaining wall (32); the surrounding wall (31) extends along the first direction (F1) and is arranged around the liquid injection hole (11); The blocking wall (32) and the shell body are arranged at intervals along the first direction (F1), and the surrounding wall (31) connects the blocking wall (32) and the insulating member (2).

9. The housing structure according to claim 8, characterized in that: The liquid passage hole (33) comprises: a first through hole (331) penetrating the insulating protective cover (3) along the first direction (F1) and arranged opposite to the liquid injection hole (11) along the first direction (F1); the aperture of the first through hole (331) is greater than or equal to the aperture of the liquid injection hole (11); A second through hole (332), wherein at least a portion of the second through hole (332) passes through the surrounding wall (31).

10. A battery, characterized in that: A housing structure comprising any one of claims 1 to 9.

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