Housing Structure and Battery

Abstract

The present application relates to the technical field of batteries, and in particular to a housing structure and a battery. The housing structure includes a housing body, an insulating member, and an insulating protective cover. The housing body is provided with a liquid injection hole penetrating through the side wall of the housing body along a first direction. The insulating member is attached to one side of the side wall of the housing body where the liquid injection hole is located, and the insulating protective cover is fixedly connected to the side of the insulating member facing away from the housing body, and the insulating protective cover covers the liquid injection hole. According to the housing structure and the battery provided by the present application, when the battery is filled with electrolyte through the liquid injection hole, on the one hand, the fixed connection between the insulating member and the cover can effectively ensure the setting stability of the insulating protective cover; on the other hand, through the blocking effect of the insulating protective cover, it can effectively prevent the internal structure of the battery from contacting the cover through the liquid injection hole, ensuring the overall insulation of the insulating member to the cover.

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;

[0006] 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.

[0007] Preferably, the insulating member and the insulating protective cover are both detachably connected.

[0008] 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.

[0009] Preferably, the number of both the pawls and the card slots is plural. The plurality of pawls are circumferentially spaced along the liquid injection hole, and the card slots are arranged corresponding to the pawls.

[0010] Preferably, define the number of the pawls as n. When the insulating protective cover and the insulating part are in an assembled state, the effective supporting area of the pawls acting on the inner wall of the card slot is S, and the shear strength of the pawls is B. The projected area of the insulating protective cover projected onto a plane perpendicular to the first direction along the first direction is , wherein, .

[0011] Preferably, when the pawls and the card slots are in a state of being engaged with each other, the effective depth of the pawls extending into the card slots along the extending direction of the card slots is T, wherein 0.3 mm ≤ T ≤ 3 mm;

[0012] The depth of the card slot is L, wherein 10% ≤ T / L ≤ 150%.

[0013] Preferably, the insulating protective cover includes a surrounding wall and a blocking wall. The surrounding wall extends along the first direction and surrounds the liquid injection hole for one week;

[0014] 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 part.

[0015] Preferably, the liquid passing hole includes:

[0016] A first through hole that penetrates the insulating protective cover along the first direction and is disposed opposite to the liquid injection hole along the first direction. The aperture of the first through hole is greater than or equal to the aperture of the liquid injection hole;

[0017] A second through hole, at least a part of which penetrates the surrounding wall.

[0018] According to a second aspect of the present application, a battery is provided, including the housing structure described in any of the above technical solutions. Therefore, it has all the beneficial technical effects of this housing structure, and will not be elaborated herein.

[0019] Compared with the prior art, the beneficial effects of the present application are:

[0020] The housing structure provided by the present application is provided with an insulating protection pile fixedly connected to one side of the back cover part of the insulating part, covering the liquid injection hole. In this way, when the electrolyte is poured into the battery through the liquid injection hole, on the one hand, the fixed connection between the insulating part and the cover part can effectively ensure the setting stability of the insulating protection cover; on the other hand, through the blocking effect of the insulating protection cover, it can effectively prevent the internal structure of the battery (such as pole ears, electrical connection pieces, etc.) from contacting the cover part through the liquid injection hole, ensuring the comprehensive insulation of the insulating part to the cover part.

[0021] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 An exploded structural schematic diagram of the housing structure provided by the embodiment of the present application;

[0024] Figure 2 For Figure 1 An enlarged structural schematic diagram of the housing structure provided at A;

[0025] Figure 3 Another partial structural schematic diagram of the housing structure provided by the embodiment of the present application;

[0026] Figure 4 An isometric structural schematic diagram of the housing structure provided by the embodiment of the present application;

[0027] Figure 5 For Figure 4 An enlarged structural schematic diagram of the housing structure provided at B;

[0028] Figure 6 A sectional structural schematic diagram of the housing structure provided by the embodiment of the present application;

[0029] Figure 7 For Figure 6 An enlarged structural schematic diagram of the housing structure provided at C.

[0030] Reference numerals:

[0031] 1 - Cover part; 11 - Liquid injection hole; 12 - Terminal post; 2 - Insulating part; 20 - Insulating joint part; 21 - Claw; 211 - Claw hook; 212 - Claw arm; 22 - Limit protrusion; 3 - Insulating protective cover; 31 - Enclosing wall; 32 - Baffle wall; 33 - Liquid passing hole; 331 - First through hole; 332 - Second through hole; 34 - Card slot.

[0032] F1 - First direction; F2 - Second direction; F3 - Third direction. Detailed implementation manners

[0033] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present application.

[0034] Generally, the components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application.

[0035] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0036] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation of the present application. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0037] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0038] Next, refer to Figures 1 to 7 Describe the housing structure and battery according to some embodiments of the present application.

[0039] See Figures 1 to 7As shown in the figure, an embodiment of the first aspect of the present application provides a housing structure, which includes a housing body, an insulating member 2 and an insulating protective cover 3. The housing body is provided with a liquid injection hole 11 penetrating through the side wall of the housing body along the first direction F1. The insulating member 2 is attached to one side of the side wall of the housing 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 housing body, and the insulating protective cover 3 covers the liquid injection hole.

[0040] According to the housing structure provided by the above technical features, the insulating protective cover fixedly connected to the side of the insulating member 2 facing away from the housing body covers the liquid injection hole 11. In this way, when the electrolyte is poured into the battery through the liquid injection hole 11, on the one hand, the fixed connection between the insulating member 2 and the housing body can effectively ensure the setting stability 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, pole ears, electrical connection pieces, etc.) from contacting the housing body through the liquid injection hole 11, ensuring the comprehensive insulation of the insulating member 2 to the housing body.

[0041] Preferably, the above housing body may include a housing part and a cover part 1, and the housing part and the cover part 1 are buckled with each other to enclose a sealed space for accommodating the electrode group.

[0042] Preferably, as Figures 1 to 7 shown, the figure shows an example in which the above liquid injection hole 11 is provided in the cover part 1. In other words, the above insulating member 2 can be attached to one side of the cover part 1.

[0043] However, it is not limited to this. As not shown in the figure, the above liquid injection hole can also be provided on the side wall of the housing part. Correspondingly, the insulating member can also be attached to one side of the side wall of the housing part where the liquid injection hole is located.

[0044] As Figures 1 to 7 shown, hereinafter, taking the liquid injection hole 11 provided in the cover part 1 as an example, the above housing structure will be described in detail.

[0045] As Figures 1 to 7 shown, F1 shown in the figure can be an example of the above first direction F1. For the convenience of description, the two directions perpendicular to each other in the direction perpendicular to the first direction F1 are respectively defined as the second direction F2 and the third direction F3. As Figures 1 to 7 shown, the figure shows an example in which the above housing structure is applicable to a square battery. In other words, the above cover part 1 has a rectangular plate-like structure. However, it is not limited to this. As long as the structure of the insulating protective cover 3 is set to prevent the internal structure of the battery from contacting the cover part 1 through the liquid injection hole 11, the above housing structure can also be applicable to other shaped batteries, for example, cylindrical batteries or other special-shaped batteries.

[0046] Preferably, as Figures 1 to 7As 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 square battery, so as to adapt to most square battery structures.

[0047] Preferably, as Figures 1 to 5 shown, the insulating protective cover 3 can be provided with a liquid passing hole 33 penetrating through the insulating protective cover 3 to prevent the insulating protective cover 3 from interfering with the liquid injection of the liquid injection hole 11.

[0048] Preferably, as Figures 1 to 5 shown, the liquid passing hole 33 can include a first through hole 331. The first through hole 331 can penetrate through the insulating protective cover 3 along the first direction F1, and the first through hole 331 is disposed opposite to the liquid injection hole 11 along the first direction F1 to further ensure the smoothness of the liquid injection of the liquid injection hole 11.

[0049] Preferably, as Figure 7 shown, the aperture of the first through hole 331 can be greater than or equal to the aperture of the liquid injection hole 11. On the one hand, it further improves the smoothness of the liquid injection of the liquid injection hole 11; on the other hand, it effectively reduces the impact of the electrolyte on the insulating protective cover 3 during the liquid injection process and improves the setting stability of the insulating protective cover 3 and the insulating member 2.

[0050] Preferably, as Figure 1 、 Figure 2 and Figure 5 shown, the insulating protective cover 3 can include a surrounding wall 31 and a baffle wall 32. The surrounding wall 31 can extend along the first direction F1, and the surrounding wall 31 can surround the liquid injection hole 11 for one week. The baffle wall 32 and the cover portion 1 can be spaced apart along the first direction F1, and the surrounding wall 31 can connect the insulating member 2 and the baffle wall 32 to realize the connection between the protective insulating cover and the insulating member 2.

[0051] Preferably, as Figures 1 to 5 shown, the liquid passing hole 33 can further include a second through hole 332. At least a part of the second through hole 332 can penetrate through the 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 smoothness of the liquid injection of the liquid injection hole 11 can be maintained through the second through hole 332.

[0052] In the embodiment, preferably, as Figures 1 to 3 shown, the insulating member 2 and the insulating protective cover 3 can be detachably connected. In this way, 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 independently manufactured, reducing the manufacturing difficulty.

[0053] Preferably, asFigures 1 to 3 As shown, the insulating part 2 is provided with clamping claws 21, and the insulating protective cover 3 is provided with clamping grooves 34. The insulating part 2 and the insulating protective cover 3 are clamped via the clamping claws 21 and the clamping grooves 34. However, it is not limited to this. As long as the clamping of the insulating part 2 and the insulating protective cover 3 can be achieved, although not shown in the figure, the above-mentioned clamping claws can also be provided on the insulating protective cover 3, and the above-mentioned clamping grooves can be provided on the insulating part.

[0054] Preferably, as Figure 2 and Figure 3 shown, the number of both the above-mentioned clamping claws 21 and the clamping grooves 34 is multiple. The multiple clamping claws 21 are arranged at intervals in the circumferential direction of the liquid injection hole 11, and the clamping grooves 34 are arranged corresponding to the clamping claws 21. In this way, the connection stability between the insulating protective cover 3 and the insulating part 2 is ensured.

[0055] As Figure 7 shown, the above-mentioned clamping claws 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 one end of the claw arm 212 away from the cover part 1. In the radial direction of the liquid injection hole 11, the claw hook 211 protrudes relative to the claw arm 212, so that at least part of the claw hook 211 extends into the clamping groove 34 in the radial direction of the liquid injection hole 11, so as to realize the limitation of the position of the clamping claw 21 in the first direction F1 by the clamping groove 34.

[0056] Preferably, as Figures 1 to 7 shown, the above-mentioned clamping groove 34 may be provided on the above-mentioned peripheral wall 31, and the clamping groove 34 may extend in the radial direction of the liquid injection hole 11 to adapt to the structure of the peripheral wall 31 surrounding the liquid injection hole 11 for one week.

[0057] Preferably, as Figure 1 、 Figure 2 and Figure 7 shown, in the radial direction of the liquid injection hole 11, the claw hook 211 may be arranged on the side of the claw arm 212 facing away from the liquid injection hole 11. In this way, the above-mentioned clamping claws 21 can be clamped with the insulating protective cover 3 from the inside of the insulating protective cover 3. To ensure the setting stability of the clamping claws 21 and prevent the clamping claws 21 from rubbing against the internal structure of the battery.

[0058] However, it is not limited to this. As Figure 3As shown, in the radial direction of the liquid injection hole 11, the claw hook 211 can be arranged on the side of the claw arm 212 facing away from the liquid injection hole 11. In this way, the clamping claw 21 can be clamped with the insulating protective cover 3 from the outside of the insulating protective cover 3, so as to effectively reduce the space occupancy rate of the insulating protective cover 3. Preferably, in the radial direction of the liquid injection hole 11, the claw hook 211 can be arranged on the side of the claw arm 212 facing away from the liquid injection hole 11, and a groove extending along the first direction F1 is arranged on the outer side wall of the insulating protective cover 3, and the groove can communicate with the clamping groove 34. When the clamping claw 21 is clamped with the insulating protective cover 3, the clamping claw 21 can be embedded in the groove, so that the clamping claw 21 can be hidden in the groove, and further effectively prevent the clamping claw 21 from rubbing against the internal structure of the battery.

[0059] Preferably, , where the number of clamping 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 an assembled state, the effective bearing area of the clamping claw 21 acting on the inner wall of the clamping groove 34 is S, the shear strength of the clamping claw 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 .

[0060] It should be noted that, taking the orientation shown by Figure 7 as an example, when the insulating protective cover 3 and the insulating member 2 are in an assembled state, the effective bearing area S of the clamping claw 21 acting on the inner wall of the clamping groove 34 can be understood as the area of the overlapping part between the upper surface of the claw hook 211 and the inner wall of the clamping groove 34. 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 can be understood as the area of the remaining part of the retaining wall 32 excluding the liquid passing hole 33.

[0061] Referring to Table 1, the table shows the connection situation between the insulating protective cover 3 and the insulating member 2 after disassembling and observing the insulating protective cover 3 of the same specification battery made of insulating protective covers of different sizes and performing liquid injection operations.

[0062] Table 1:

[0063]

[0064] It can be seen from Table 1 that when the protective cover satisfies , 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 be damaged due to falling off and causing damage to the electrode group. When the protective cover satisfies , under the impact of the electrolyte, the insulating protective cover 3 falls off the insulating member 2 to varying degrees, and the electrode group is damaged by the falling insulating protective cover 3.

[0065] Preferably, as Figure 7 shown, when the claw 21 and the card slot 34 are in a state of being engaged with each other, the effective depth (i.e., the t value shown in Figure 7 ) of the claw 21 extending into the card slot 34 along the extending direction of the card slot 34 (i.e., the radial direction of the above-mentioned liquid injection hole 11) is 0.3 mm to 3 mm, which not only ensures the engagement stability between the claw 21 and the card slot 34, but also facilitates the assembly operation of the claw 21 and the insulating protective cover 3. It should be noted that the effective depth here can be understood as the dimension of the part where the claw 21 extends into the card slot 34 and overlaps with the card slot 34.

[0066] Preferably, as shown in Table 2 and Figure 7 shown, the depth of the above-mentioned card slot 34 is L mm, and the effective depth of the claw 21 engaged in the card slot 34 is t mm, where 10% ≤ t / L ≤ 150%.

[0067] Table 2:

[0068]

[0069] As can be seen from Table 2, when the dimensions of the claw 21 and the card slot 34 satisfy 10% ≤ t / L, the engagement stability between the claw 21 and the card slot 34 can be effectively ensured, and the claw 21 can be effectively prevented from disengaging from the slot. However, when the dimensions of the claw 21 and the card slot 34 reach t / L ≥ 150%, although the claw 21 can be prevented from disengaging from the slot, it is difficult to install the claw 21 into the card slot 34 due to the overlong dimension of the claw 21, resulting in difficult assembly.

[0070] Preferably, as Figure 7 shown, the above-mentioned card slot 34 can penetrate the above-mentioned surrounding wall 31 along the radial direction of the liquid injection hole 11 to ensure that the card hook can completely extend into the card slot 34, so as to reduce the engagement stress of the claw 21 in the assembled state with the insulating protective cover 3 and reduce the probability of the claw 21 being broken.

[0071] Preferably, as Figure 6 shown, the dimension of the above-mentioned insulating protective cover 3 in the first direction F1 is less than or equal to the maximum distance of the above-mentioned insulating part 2 in the first direction F1 (in other words, the dimension of the insulating protective cover 3 in the first direction F1 is less than or equal to the following limiting protrusion 22), so as to prevent the insulating protective cover 3 from interfering with the pole group and damaging the pole group.

[0072] Optionally, as Figure 1 , Figure 4 and Figure 6 shown, the above-mentioned cover part 1 can also be provided with a pole post 12.

[0073] Preferably, as Figure 6As shown, the above-mentioned insulating member 2 may include an insulating fitting portion 20 and a limiting protrusion 22. The above-mentioned insulating fitting portion 20 is attached to one side of the above-mentioned cover portion 1 to insulate the cover portion 1 from the inside of the battery. The above-mentioned clamping claws 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 part of the insulating member 2 with the maximum distance in the first direction F1. 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.

[0074] Optionally, the above-mentioned insulating fitting portion 20, the limiting protrusion 22 and the clamping claws 21 may be integrally injection-molded and connected.

[0075] An embodiment of the second aspect of the present application further provides a battery, including the housing structure described in any of the above embodiments. Therefore, it has all the beneficial technical effects of this housing structure and will not be elaborated here.

[0076] Preferably, not shown in the figure, when the electrode group and the cover portion are in an assembled state, a part of the above-mentioned insulating member abuts against the electrode group to limit the electrode group through the insulating member.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. 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, It includes a shell body, an insulating part (2) and an insulating protective cover (3). The shell body is provided with a liquid injection hole (11) penetrating through the side wall of the shell body along the first direction (F1). The insulating part (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 part (2) facing away from the shell body, and the insulating protective cover (3) covers the liquid injection hole (11). The insulating part (2) and the insulating protective cover (3) are detachably connected to each other. One of the insulating part (2) and the insulating protective cover (3) is provided with a clamping claw (21), and the other of the insulating part (2) and the insulating protective cover (3) is provided with a clamping groove (34). The insulating part (2) and the insulating protective cover (3) are clamped through the clamping claw (21) and the clamping groove (34). The number of both the clamping claw (21) and the clamping groove (34) is multiple. The multiple clamping claws (21) are arranged at intervals along the circumferential direction of the liquid injection hole (11), and the clamping groove (34) is arranged corresponding to the clamping claw (21). Define the number of the jaws (21) as n. When both the insulating protective cover (3) and the insulating member (2) are in the assembled state, the effective supporting area of the jaws (21) acting on the inner wall of the card slot (34) is S, where the unit of S is mm 2 ; the shear strength of the jaws (21) is B, where the unit of B is MPa, and the projected area of the insulating protective cover (3) projected onto a plane perpendicular to the first direction (F1) along the first direction (F1) is S1, where the unit of S1 is mm 2 , where, .

2. The housing structure according to claim 1, characterized in that The insulating protective cover (3) is provided with a liquid passing hole (33) penetrating through the insulating protective cover (3). The shell body includes a shell part and a cover part (1) that are snapped together, and the liquid injection hole is provided on the shell part and / or the cover part (1).

3. The housing structure according to claim 1, wherein When the clamping claw (21) and the clamping groove (34) are in a clamped state with each other, the effective depth that the clamping claw (21) extends into the clamping groove (34) along the extending direction of the clamping groove (34) is T, where 0.3 mm ≤ T ≤ 3 mm. The depth of the clamping groove (34) is L, where 10% ≤ T / L ≤ 150%.

4. The housing structure according to claim 2, characterized in that, The insulating protective cover (3) includes a surrounding wall (31) and a blocking wall (32). The surrounding wall (31) extends along the first direction (F1) and surrounds the liquid injection hole (11) for one week. The blocking wall (32) and the shell body are spaced apart along the first direction (F1), and the surrounding wall (31) connects the blocking wall (32) and the insulating part (2).

5. The housing structure according to claim 4, wherein, The liquid passing hole (33) includes: A first through hole (331) that penetrates through the insulating protective cover (3) along the first direction (F1) and is disposed 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), at least a part of the second through hole (332) penetrates through the surrounding wall (31).

6. A battery, characterized in that, It includes the housing structure according to any one of claims 1 to 5.

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