Battery shell, battery, battery pack and vehicle

Abstract

The utility model relates to a battery shell, a battery, a battery pack and a vehicle. The battery shell comprises a wall body and an accommodating space defined by the wall body, and the accommodating space is used for accommodating a battery cell. The wall body is provided with an anti-explosion hole and a liquid injection hole which are communicated with the containing space. And the anti-explosion hole is used for accommodating an anti-explosion valve. Wherein the anti-explosion hole and the liquid injection hole are formed in the same side of the wall body at an interval. The battery shell is provided with the anti-explosion hole and the liquid injection hole, so that the anti-explosion valve of the battery is far away from the pole on the cover body, high-temperature gas leaving the accommodating space from the anti-explosion valve can be prevented from influencing the pole, and the safety and the electric energy transmission stability of the battery are improved. The liquid injection hole allows the electrolyte to be injected into the accommodating space, and the electrolyte overflowing from the liquid injection hole is also difficult to pollute the pole of the battery cover body, so that the risk that the voltage between the pole and the battery shell is reduced is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a battery shell, a battery, a battery pack and a vehicle. BACKGROUND

[0002] With the popularization of new energy electric vehicles, people pay more and more attention to the safety of batteries. In the use process of the battery, electricity and heat are crucial to the safety of the battery. The interaction of electricity and heat can cause the deterioration of the safety of the battery. Therefore, the design of separating electricity and heat for the battery is beneficial to improve the safety of the battery.

[0003] The explosion-proof valve and the liquid injection hole of the conventional battery are generally arranged on the battery cover plate, and the battery design of "thermal-electric separation" separates the explosion-proof valve and the pole column of the cover plate, so as to avoid the high-temperature gas generated in the thermal runaway from breaking through the explosion-proof valve and affecting the electrical connection of the pole column. However, the existing "thermal-electric separation" technology does not consider the influence of the liquid injection hole on the safety of the battery. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a battery shell, a battery, a battery pack and a vehicle to solve part or all of the deficiencies in the related art.

[0005] The present application provides a battery shell, comprising a wall body and a containing space formed by the wall body; the containing space is used for accommodating a battery cell; wherein,

[0006] The wall body is provided with an explosion-proof hole and a liquid injection hole communicating with the containing space; the explosion-proof hole is used for accommodating an explosion-proof valve; wherein, the explosion-proof hole and the liquid injection hole are arranged on the same side of the wall body.

[0007] Further, the wall body comprises a first surface and a recessed portion arranged on the first surface and recessed towards the direction of the containing space; the recessed portion comprises a second surface away from the first surface; the liquid injection hole is arranged on the first surface; and the explosion-proof hole is arranged on the second surface.

[0008] Further, the recessed depth of the recessed portion is less than or equal to 20mm.

[0009] Further, the recessed portion is arranged centrally on the first surface; and / or, the explosion-proof hole is arranged centrally on the wall body.

[0010] Further, the number of the liquid injection holes comprises a plurality; and a plurality of the liquid injection holes are symmetrically arranged on the first surfaces on both sides of the recessed portion.

[0011] Further, a distance between the liquid injection hole and the explosion-proof hole is a first distance; the first distance is greater than or equal to 10 mm and less than or equal to 300 mm; and / or, a distance between the liquid injection hole and an edge of the wall body is a second distance; the second distance is greater than or equal to 5 mm and less than or equal to 50 mm.

[0012] The second aspect of the present application provides a battery, comprising a cover body, an electric core, an explosion-proof valve, and the battery shell of the foregoing embodiments; the accommodation space comprises an opening; the electric core is accommodated in the accommodation space through the opening; the explosion-proof valve is arranged in the explosion-proof hole; and the cover body is connected to the battery shell at the opening.

[0013] Further, the opening comprises a first opening and a second opening arranged oppositely; the cover body comprises a first cover plate arranged at the first opening and a second cover plate arranged at the second opening.

[0014] The first cover plate is provided with a first boss on a side away from the first opening; and the second cover plate is provided with a second boss on a side away from the second opening.

[0015] The first boss comprises a first protruding portion extending away from the first opening; the first protruding portion is used to abut against the second boss to limit relative movement of the first boss and the second boss in at least one direction; and / or, the second boss comprises a second protruding portion extending away from the second opening; the second protruding portion is used to abut against the first boss to limit relative movement of the first boss and the second boss in at least one direction.

[0016] The third aspect of the present application provides a battery pack, comprising the battery of the foregoing embodiments; the number of the batteries is a plurality; and the plurality of batteries are electrically connected.

[0017] The fourth aspect of the present application provides a vehicle, comprising the battery pack of the foregoing embodiments.

[0018] The technical solutions provided by the embodiments of the present application can have the following beneficial effects:

[0019] As can be seen from the foregoing embodiments, the battery shell of the present application is provided with an explosion-proof hole and a liquid injection hole, so that the explosion-proof valve of the battery is away from the pole column on the cover body, which can avoid the influence of high-temperature gas from the explosion-proof valve on the pole column, thereby improving the safety and electrical energy transmission stability of the battery. The liquid injection hole is also arranged on the battery shell and is also away from the pole column. During the assembly process of the battery or the maintenance process of the battery in the later period, the liquid injection hole allows the injection of electrolyte into the accommodation space, and the electrolyte overflowing from the liquid injection hole is also difficult to contaminate the pole column, thereby avoiding the risk of voltage reduction between the pole column and the battery shell.

[0020] It should be understood that the general description and detailed description of the following are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 An exploded schematic view of one embodiment of the battery of the present application is shown;

[0023] Figure 2 An exploded schematic view of another embodiment of the battery of the present application is shown; Figure 1 A general schematic view of the battery shell of the battery shown;

[0024] Figure 3 An exploded schematic view of another embodiment of the battery of the present application is shown;

[0025] Figure 4 A general schematic view of one embodiment of the first cover of the battery of the present application is shown;

[0026] Figure 5 A general schematic view of one embodiment of the second cover of the battery of the present application is shown.

[0027] Explanation of reference signs:

[0028] 100 battery, 1 battery shell, 11 wall body, 111 explosion-proof hole, 112 liquid injection hole, 113 first surface, 114 recessed part, 1141 second surface, 12 accommodation space, 121 first opening, 122 second opening, 2 first cover plate, 21 first boss, 211 first protruding part, 22 positive pole, 3 second cover plate, 31 second boss, 311 second protruding part, 32 negative pole, 4 battery cell, 5 explosion-proof valve, X first direction, Y second direction, Z third direction, D1 recess depth, D2 first distance, D3 second distance. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments (or "embodiments") of the present application will be described clearly and completely in conjunction with the drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

[0030] If the application embodiments involve the terms of direction indication or position relationship (for example, up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings); if the specific posture changes, the direction indication or position relationship will also change accordingly. In addition, the application embodiments involve the terms of "first", "second", etc., which are only used for convenience of description and cannot be understood as indicating or implying relative importance.

[0031] Reference Figure 1 and Figure 2 The application provides a battery 100. The battery 100 comprises a battery shell 1, a cover and a battery cell 4. The battery shell 1 comprises a wall 11 and a containing space 12 formed by the wall 11. The containing space 12 comprises an opening. The battery cell 4 is accommodated in the containing space 12 through the opening. The cover is connected with the battery shell 1 at the opening, so as to keep the battery cell 4 in the containing space 12.

[0032] In Figure 1 The cover comprises a first cover plate 2 and a second cover plate 3 in the embodiment shown. The opening comprises a first opening 121 and a second opening 122 oppositely arranged in the first direction X. The first cover plate 2 is connected with the battery shell 1 at the first opening 121. The second cover plate 3 is connected with the battery shell 1 at the second opening 122. In the scheme of, for example, a single pole, the first cover plate 2 can be arranged as the positive electrode of the battery 100, and the second cover plate 3 is arranged as the negative electrode of the battery 100, so as to realize the output and input of the electric energy in the battery cell 4. Indeed, the cover can only comprise one, and the number of openings is also one. The positive electrode and the negative electrode of the battery 100 are output through the same cover. The application is not limited thereto.

[0033] The wall 11 of the battery shell 1 of the application is provided with an explosion-proof hole 111 and a liquid injection hole 112 communicating with the containing space 12. The explosion-proof hole 111 accommodates the explosion-proof valve 5 of the battery 100. The explosion-proof hole 111 and the liquid injection hole 112 are arranged on the same side of the wall 11.

[0034] In other words, the explosion vent 111 and the liquid injection hole 112 of the battery 100 according to the present application are both arranged on the battery case 1. The explosion vent 111 is arranged on the battery case 1, so the explosion vent 5 of the battery 100 is away from the pole on the cover. When the battery 100 generates thermal runaway, the high-temperature gas bursts through the explosion vent 5. Since the explosion vent 5 is away from the pole, the high-temperature gas can be prevented from affecting the pole, thereby avoiding affecting the stability and safety of the electrical connection of the battery 100. The liquid injection hole 112 is arranged on the battery case 1, and is also away from the pole. During the assembly process of the battery 100 or the later maintenance process of the battery 100, the liquid injection hole 112 allows the electrolyte to be injected into the accommodation space 12 to soak the battery cell 4, and the electrolyte overflowing from the liquid injection hole 112 is also difficult to contaminate the pole arranged away, thereby avoiding the risk of voltage reduction between the pole and the battery case 1.

[0035] In addition, compared with the scheme in which the explosion vent 5 and the liquid injection hole 112 are arranged on the cover, the battery case 1 according to the present application allows the battery 100 to release the use space of the cover, increases the use area of the electrical connection, reduces the internal resistance of the battery cell 4, so that the temperature rise of the battery cell 4 during use is reduced, and the safety of the battery 100 is further improved.

[0036] In Figure 1 In the view shown, the liquid injection hole 112 and the explosion vent 5 are arranged on the surface of the upper side of the battery case 1, that is, when the battery 100 is used, the surface is away from the ground and faces upward. In this way, when the electrolyte is input to the battery cell 4 through the liquid injection hole 112 during the maintenance process of the battery 100, the placement angle of the battery 100 does not need to be changed, the injection efficiency is improved. And it is more convenient to carry out welding sealing after injection, improving the processing and maintenance efficiency.

[0037] In Figure 1 In the embodiment shown, the upper side surface of the battery case 1 is narrower than the front side surface of the plane where the first direction X and the second direction Y are located, so the liquid injection hole 112 and the explosion vent 111 are arranged at intervals along the first direction X. However, this should be exemplary and not limiting. The upper side surface can be wider than the front side surface, or the same, so the liquid injection hole 112 and the explosion vent 111 can be arranged at intervals along the first direction X or the second direction Y, and the present application does not limit this.

[0038] It should be noted that, for the convenience and brevity of description, the first direction X, the second direction Y and the third direction Z are arranged as reference directions in the drawings. And the first direction X, the second direction Y and the third direction Z are in a perpendicular relationship with each other. However, this should be exemplary and not limiting. The first direction X, the second direction Y and the third direction Z can be at any angle with each other as long as they are not parallel to each other.

[0039] The injection hole 112 and the explosion-proof hole 111 are arranged at intervals, so that the electrolyte overflow after the injection of the electrolyte into the battery cell 4 can avoid contaminating the explosion-proof valve 5. The explosion-proof valve 5 may be further corroded after being contaminated by the electrolyte, thereby reducing the safety threshold of the explosion-proof valve 5. The distance between the injection hole 112 and the explosion-proof hole 111 is referred to as a first distance D2. In an optional embodiment, the first distance D2 is greater than or equal to 10 mm and less than or equal to 300 mm. For example, the first distance D2 can be 10 mm, 60 mm, 110 mm, 160 mm, 210 mm, 260 mm, 300 mm, or any value therebetween. In an embodiment with a too small first distance D2, it is difficult to ensure that there is a sufficient safety distance between the injection hole 112 and the explosion-proof hole 111, and meanwhile, the strength of the battery shell 1 at the position where the injection hole 112 and the explosion-proof hole 111 are arranged can be affected. In an embodiment with a too large first distance D2, the size of the battery shell 1 in the first direction X can be increased, or the explosion-proof hole 111 is too close to the edge of the wall body 11 of the battery shell 1, which makes the explosion-proof valve 5 difficult to work effectively or affects the battery shell 1. Indeed, the size of the battery shell 1 in the first direction X is increased, and then the selectable range of the first distance D2 is increased. Therefore, a person skilled in the art can reasonably select the value of the first distance D2 according to the specific size of the battery shell 1 in the first direction X.

[0040] Similarly, if the injection hole 112 is too close to the edge of the wall body 11, the overflowed electrolyte after the injection of the electrolyte can overflow to the cover body and affect the pole piece. The distance between the injection hole 112 and the edge of the wall body 11 is referred to as a second distance D3. In an optional embodiment, the second distance D3 is greater than or equal to 5 mm and less than or equal to 50 mm. For example, the second distance D3 can be 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm, or any value therebetween. If the second distance D3 is too small, the overflowed electrolyte can easily flow to the cover body and affect the pole piece. If the second distance D3 is too large, it is inconvenient to inject the electrolyte into the battery 100 subsequently. The second distance D3 can better ensure that the overflowed electrolyte affects the pole piece, and meanwhile, the convenience of adding the electrolyte is considered.

[0041] It should be noted that the first distance D2 is understood as the minimum distance between the injection hole 112 and the explosion-proof hole 111 in the first direction X. The second distance D3 is understood as the minimum distance between the injection hole 112 and the edge of the wall body 11 in the first direction X.

[0042] Reference Figure 3In some embodiments, the wall body 11 comprises a first surface 113 and a recessed portion 114 arranged on the first surface 113 and recessed towards the direction of the accommodation space 12. The recessed portion 114 comprises a second surface 1141 away from the first surface 113. The liquid injection hole 112 is arranged on the first surface 113. The explosion-proof hole 111 is arranged on the second surface 1141. In this embodiment, in order to be able to be smoothly assembled into the accommodation space 12, the size of the battery cell 4 in the third direction Z needs to be adapted to the second surface 1141. In other words, the first surface 113 is higher than the second surface 1141, so that there is a distance between the first surface 113 and the battery cell 4 in the third direction Z. In this way, when a person injects liquid into the accommodation space 12 through the liquid injection hole 112, the distance between the liquid injection hole 112 and the battery cell 4 is larger, avoiding the battery cell 4 from blocking the input of electrolyte of the liquid injection hole 112. At the same time, when the electrolyte overflows from the liquid injection hole 112, it can also be explained that the accommodation space 12 where the battery cell 4 is located is filled with sufficient electrolyte to soak the battery cell 4, further ensuring the normal work of the battery 100.

[0043] Optionally, the recessed depth D1 of the recessed portion 114 is less than or equal to 20 mm. For example, it can be 2 mm, 5 mm, 10 mm, 15 mm, 20 mm, etc. If the recessed depth D1 is too high, it will result in that the battery shell 1 occupies too much space in the third direction Z, and at the same time it may be difficult to further improve the efficiency of injecting electrolyte. Therefore, the recessed depth D1 in this range of values can effectively ensure the injection efficiency of the electrolyte, while having little effect on the volume of the battery shell 1.

[0044] Further, in some optional embodiments, the recessed portion 114 is centrally arranged on the first surface 113. Figure 3 For example, in the embodiment shown, the recessed portion 114 exists on both sides of the first surface 113 in the first direction X, and the areas of the first surfaces 113 on both sides are the same. This arrangement can avoid the setting of the recessed portion 114 causing the center of gravity of the battery shell 1 to deviate from the center. At the same time, in the embodiment in which the cover body comprises the first cover plate 2 and the second cover plate 3, this arrangement makes it unnecessary to distinguish the placement direction of the battery shell 1 when assembling the battery 100, improving the assembly efficiency.

[0045] On this basis, in some embodiments, the number of liquid injection holes 112 comprises a plurality. The plurality of liquid injection holes 112 are symmetrically arranged on the first surfaces 113 on both sides of the recessed portion 114. As shown in Figure 3 The number of liquid injection holes 112 is two, and each is arranged on the first surface 113 on both sides in the first direction X. In this way, the injection efficiency of the electrolyte can be improved. When injecting electrolyte, if electrolyte injection can only be performed on one side in the first direction X, the arrangement of the plurality of liquid injection holes 112 can also facilitate the injection operation without changing the placement orientation of the battery shell 1.

[0046] Optionally, the explosion-proof hole 111 is centrally arranged on the wall body 11. The central arrangement of the explosion-proof hole 111 enables the explosion-proof valve 5 to timely discharge gas when thermal runaway occurs inside the accommodation space 12. In the embodiment shown in the figure, the explosion-proof hole 111 is arranged at the right side of the first direction X. When the explosion-proof valve 5 is arranged at the right side of the first direction X, the explosion-proof valve 5 is more sensitive to the thermal runaway on the right side of the accommodation space 12, and the thermal runaway on the left side of the accommodation space 12 is more serious, which makes the explosion-proof valve 5 work. Therefore, the central arrangement of the explosion-proof hole 111 can avoid the problem of uneven thermal runaway regulation effect inside the accommodation space 12. Figure 2 Optionally, the explosion-proof hole 111 is centrally arranged on the wall body 11. The central arrangement of the explosion-proof hole 111 enables the explosion-proof valve 5 to timely discharge gas when thermal runaway occurs inside the accommodation space 12. In the embodiment shown in the figure, the explosion-proof hole 111 is arranged at the right side of the first direction X. When the explosion-proof valve 5 is arranged at the right side of the first direction X, the explosion-proof valve 5 is more sensitive to the thermal runaway on the right side of the accommodation space 12, and the thermal runaway on the left side of the accommodation space 12 is more serious, which makes the explosion-proof valve 5 work. Therefore, the central arrangement of the explosion-proof hole 111 can avoid the problem of uneven thermal runaway regulation effect inside the accommodation space 12.

[0047] The application further provides a battery pack based on the above-mentioned embodiments. The battery pack comprises a plurality of electrically connected batteries 100.

[0048] When the plurality of batteries 100 are electrically connected to form a battery pack, the plurality of batteries 100 can be arranged along the first direction X, and the first cover plate 2 of the battery 100 needs to be electrically connected with the second cover plate 3 of the adjacent battery 100, and the second cover plate 3 needs to be electrically connected with the first cover plate 2 of the battery 100 at the other end.

[0049] As shown in the figure, the first cover plate 2 is provided with a first boss 21 on the side away from the first opening 121. The second cover plate 3 is provided with a second boss 31 on the side away from the second opening 122. Taking the first boss 21 as the positive electrode end and the second boss 31 as the negative electrode end as an example, when the battery 100 is connected to form a battery pack, the first boss 21 is welded with the second boss 31 of the adjacent battery 100, and the second boss 31 is welded with the first boss 21 of the battery 100 at the other end. In this way, the battery pack can form an electrical conduction. Figure 4 and Figure 5 As shown in the figure, the first cover plate 2 is provided with a first boss 21 on the side away from the first opening 121. The second cover plate 3 is provided with a second boss 31 on the side away from the second opening 122. Taking the first boss 21 as the positive electrode end and the second boss 31 as the negative electrode end as an example, when the battery 100 is connected to form a battery pack, the first boss 21 is welded with the second boss 31 of the adjacent battery 100, and the second boss 31 is welded with the first boss 21 of the battery 100 at the other end. In this way, the battery pack can form an electrical conduction.

[0050] Figure 4 In the embodiment shown in the figure, the first cover plate 2 is provided with one first boss 21. Although two first poles 22 are arranged on the first boss 21, since the first boss 21 is only used as the positive electrode end, and no other boss is arranged on the first cover plate 2 as the electrode, the first cover plate 2 is actually a positive electrode cover plate of the single-pole battery 100. Figure 4 In the embodiment shown in the figure, the first cover plate 2 is provided with one first boss 21. Although two first poles 22 are arranged on the first boss 21, since the first boss 21 is only used as the positive electrode end, and no other boss is arranged on the first cover plate 2 as the electrode, the first cover plate 2 is actually a positive electrode cover plate of the single-pole battery 100.

[0051] Similarly, the second cover plate 3 is provided with one second boss 31, and two second poles 32 are arranged on the second boss 31. Since the second boss 31 is only used as the negative electrode end, the second cover plate 3 is actually a negative electrode cover plate of the single-pole battery 100. Figure 5 Similarly, the second cover plate 3 is provided with one second boss 31, and two second poles 32 are arranged on the second boss 31. Since the second boss 31 is only used as the negative electrode end, the second cover plate 3 is actually a negative electrode cover plate of the single-pole battery 100.

[0052] In the multi-stage column battery 100, as an example of the first cover plate 2, two first bosses 21 can be provided on the first cover plate 2, and the two first bosses 21 can be of the same polarity or of different polarities. Correspondingly, the second cover plate 3 of the battery 100 is also provided with two second bosses 31, and the two second bosses 31 can be of the same polarity or of different polarities.

[0053] In the embodiment in which a plurality of batteries 100 are arranged in the first direction X to form a battery pack, in order to improve the connection stability between the plurality of batteries 100, optionally, the first boss 21 comprises a first protruding portion 211 extending away from the first opening 121. The first protruding portion 211 is used to abut against the second boss 31 to limit the relative movement of the first boss 21 and the second boss 31 in at least one direction.

[0054] In Figure 4 and Figure 5 the illustrated embodiment, the first protruding portion 211 is provided at the end of the first boss 21 in the third direction Z and extends along the second direction Y and the first direction X. When the first protruding portion 211 is connected with the second boss 31 of the adjacent battery 100, it abuts against the circumferential surface of the second boss 31 parallel to the second direction Y and the first direction X. By such arrangement, the change of the relative position of the two adjacent batteries 100 in the third direction Z is limited.

[0055] Optionally, as shown in Figure 5 , the second boss 31 comprises a second protruding portion 311 extending away from the second opening 122. The second protruding portion 311 is used to abut against the first boss 21. In Figure 5 the illustrated embodiment, the second protruding portion 311 comprises two, which are respectively provided on both sides of the second boss 31 in the second direction Y and extend along the first direction X and the third direction Z. When the second boss 31 and the first boss 21 are connected, the second protruding portion 311 and the first boss 21 are connected with the circumferential surface parallel to the first direction X and the third direction Z, thereby limiting the change of the relative position of the two batteries 100 in the second direction Y.

[0056] Of course, Figure 4 and Figure 5 the illustrated embodiments are only exemplary and not limiting. For example, the battery 100 can be provided with only the first protruding portion 211 on the first boss 21, and the second boss 31 is not provided with the second protruding portion 311. Alternatively, the battery 100 can be provided with only the second protruding portion 311 on the second boss 31, and the first boss 21 is not provided with the first protruding portion 211.

[0057] In addition, in terms of shape, the first protruding portion 211 and the second protruding portion 311 can be as shown in Figure 4 and Figure 5The first protruding part 211 and the second protruding part 311 can be in the shape of a rectangular parallelepiped, or can be in the shape of a T, a semicircle, a circle, or the like in the projection in the first direction X. The present application is not limited thereto. In addition, the shapes of the first protruding part 211 and the second protruding part 311 can be the same or different. In addition, the first protruding part 211 can be, for example, Figure 4 and Figure 5 The first protruding part 211 can be in abutment with the circumferential surface of the second boss 31, or can be inserted into a groove provided in the second boss 31. In the embodiment in which the first protruding part 211 and the groove are engaged with each other, the relative positions of the first boss 21 and the second boss 31 in the two directions are limited.

[0058] The first protruding part 211 can be one or a plurality of protruding parts. The plurality of first protruding parts 211 can be provided on the same side of the first boss 21, or can be provided on adjacent sides or opposite sides. Similarly, the second protruding part 311 can be one or a plurality of protruding parts. Figure 5 The second protruding part 311 can be one or a plurality of protruding parts. In addition, the plurality of second protruding parts 311 can be provided on the same side of the second boss 31, or can be provided on adjacent sides.

[0059] In addition, the plurality of batteries 100 can be arranged in the width direction to form a battery pack. In this case, the connection and conduction between the batteries 100 can be performed by a conductive sheet or the like. The present application is not limited to the specific connection method.

[0060] Based on the above embodiments, the present application also provides a vehicle. The vehicle includes the battery pack according to any one of the above embodiments.

[0061] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; any modification, equivalent replacement, improvement, and the like within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A battery case characterized by comprising: The wall body (11) is provided with an explosion-proof hole (111) and a liquid injection hole (112) communicating with the accommodation space (12); the explosion-proof hole (111) is used for accommodating an explosion-proof valve; wherein the explosion-proof hole (111) and the liquid injection hole (112) are arranged on the same side of the wall body (11). The wall body (11) includes a first surface (113) and a recessed portion (114) arranged on the first surface (113) and recessed towards the direction of the accommodation space (12); the recessed portion (114) includes a second surface (1141) away from the first surface (113); the liquid injection hole (112) is arranged on the first surface (113); and the explosion-proof hole (111) is arranged on the second surface (1141).

2. The battery case according to claim 1, characterized by The recessed depth (D1) of the recessed portion (114) is less than or equal to 20mm.

3. The battery case according to claim 2, characterized by The recessed portion (114) is arranged centrally on the first surface (113); and / or, 4. The battery case of claim 2, wherein, The explosion-proof hole (111) is arranged centrally on the wall body (11). The number of the liquid injection holes (112) includes a plurality; and a plurality of the liquid injection holes (112) are symmetrically arranged on the first surface (113) on both sides of the recessed portion (114).

5. The battery case according to claim 4, characterized by The distance between the liquid injection hole (112) and the explosion-proof hole (111) is a first distance (D2); the first distance (D2) is greater than or equal to 10mm and less than or equal to 300mm; and / or, 6. The battery housing of any one of claims 1-5, wherein, The distance between the liquid injection hole (112) and the edge of the wall body (11) is a second distance (D3); the second distance (D3) is greater than or equal to 5mm and less than or equal to 50mm. The battery shell (1) includes a cover, an electric core (4), an explosion-proof valve (5), and the battery shell (1) according to any one of claims 1-6; the accommodation space (12) includes an opening; the electric core (4) is accommodated in the accommodation space (12) through the opening; and the explosion-proof valve (5) is arranged in the explosion-proof hole (111).

7. A battery, characterized by The cover is connected to the battery shell (1) at the opening. The opening includes a first opening (121) and a second opening (122) arranged oppositely; the cover includes a first cover plate (2) arranged at the first opening (121) and a second cover plate (3) arranged at the second opening (122); 8. The battery of claim 7, wherein, The first cover plate (2) is provided with a first boss (21) on the side away from the first opening (121); and the second cover plate (3) is provided with a second boss (31) on the side away from the second opening (122). ​ The first boss (21) comprises a first protruding part (211) extending away from the first opening (121); the first protruding part (211) is configured to abut against the second boss (31) to limit relative movement of the first boss (21) and the second boss (31) in at least one direction; and / or the second boss (31) comprises a second protruding part (311) extending away from the second opening (122); the second protruding part (311) is configured to abut against the first boss (21) to limit relative movement of the first boss (21) and the second boss (31) in at least one direction.

9. A battery pack, characterized by, The battery (100) as claimed in any one of claims 7-8; the number of the battery (100) is multiple; and the multiple batteries (100) are electrically connected.

10. A vehicle characterized by comprising: The battery pack as claimed in claim 9.

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