Battery shell, battery, battery pack and electric equipment

Abstract

The utility model relates to a battery shell, a battery, a battery pack and electric equipment, the battery shell comprises a shell and a pole assembly, the shell is provided with two mounting surfaces which are oppositely arranged, the pole assembly protrudes out of one of the two mounting surfaces, the other one of the two mounting surfaces is provided with a pit, and the pit is used for accommodating the pole assembly when the battery is stacked to the other battery. And the relative distance D between the depth # imgabs0 # of the pit and the two mounting surfaces meets the condition that # imgabs1 # / D is greater than or equal to 0.1 and less than or equal to 0.8. According to the technical scheme, the pit can avoid the pole assembly of another battery, the pole assembly does not occupy the mounting space of the battery any more, one of the two mounting surfaces of the battery is attached to the other one of the two mounting surfaces of the other battery, when the batteries are arranged in a stacked mode, no gap is generated between the batteries any more, and the battery assembly is convenient to assemble and disassemble. And the space utilization rate is higher.

Description

Technical Field

[0001] The present disclosure relates to the field of batteries, and in particular, to a battery casing, a battery, a battery pack and an electrical device. Background Art

[0002] Batteries usually include a pole assembly, which needs to partially protrude from the battery casing. In the process of assembling multiple batteries into a battery pack, the distance between the batteries needs to be minimized as much as possible to improve the space utilization of the battery module. In the process of stacking the batteries to assemble into a battery pack, the poles will occupy the installation space of the batteries, making it difficult to shorten the distance between the batteries during the process of assembling the batteries into a battery pack, resulting in a loss of space utilization in the battery pack. Utility Model Content

[0003] The purpose of the present disclosure is to provide a battery housing, a battery, a battery pack and an electrical device to solve the problem in the related art that it is difficult to shorten the distance between batteries during the process of assembling the batteries into a battery pack, resulting in a loss of space utilization in the battery pack.

[0004] The first object of the present disclosure is to provide a battery housing, comprising a shell and a pole assembly, wherein the shell has two mounting surfaces arranged opposite to each other, the pole assembly protrudes from one of the two mounting surfaces, and the other of the two mounting surfaces is provided with a pit, which is used to avoid the pole assembly of the other battery when the battery is stacked on another battery, wherein the depth of the pit is The relative distance D between the two mounting surfaces satisfies: 0.1≤ / D≤0.8.

[0005] Optionally, 10mm≤D≤30mm, 3mm≤ ≤15mm.

[0006] Optionally, the depth of the pit The relative distance D between the two mounting surfaces satisfies: 0.2≤ / D≤0.7, where 10mm≤D≤15mm, 3mm≤ <10mm.

[0007] Optionally, the depth of the pit The relative distance D between the two mounting surfaces satisfies: 0.3≤ / D≤0.6.

[0008] Optionally, the depth of the pit The relative distance D between the two mounting surfaces satisfies: 0.12≤ / D≤0.8, where 15mm<D≤30mm, ≤15mm.

[0009] Optionally, the depth of the pit The relative distance D between the two mounting surfaces satisfies: 0.2≤ / D≤0.6.

[0010] Optionally, the depth of the pit The height of the pole assembly satisfy > .

[0011] Optionally, the height of the pole assembly Meet 3mm≤ ≤5mm.

[0012] Optionally, in the length direction of the shell, the maximum size of the pit The maximum dimensions of the pole assembly Satisfaction: 0.5 ≤ / ≤0.85.

[0013] Optionally, in the length direction of the shell, the maximum size of the pit The maximum dimensions of the pole assembly satisfy: > , 8mm≤ ≤20mm, 6mm≤ ≤16mm.

[0014] Optionally, in the width direction of the shell, the maximum size of the pit The maximum dimensions of the pole assembly Satisfy: 0.3 ≤ / ≤0.8.

[0015] Optionally, in the width direction of the shell, the maximum size of the pit The maximum dimensions of the pole assembly satisfy: > , 20mm≤ ≤70mm.

[0016] Optionally, in the width direction of the shell, the pit passes through the shell.

[0017] Optionally, the pole assembly and the recess are respectively arranged at the ends of the battery housing in the length direction.

[0018] Optionally, the length of the battery housing is 400mm-1500mm, and the width of the battery housing is 80mm-220mm.

[0019] Optionally, the shell includes a bottom shell and a cover plate covering the bottom shell, an end surface of the cover plate away from the bottom shell forms one of the two mounting surfaces, and an end surface of the bottom shell away from the cover plate forms the other of the two mounting surfaces.

[0020] Optionally, the pole assembly includes a positive pole assembly and a negative pole assembly, and a first recess corresponding to the positive pole assembly and a second recess corresponding to the negative pole assembly are formed on the shell.

[0021] Optionally, the positive electrode column assembly and the negative electrode column assembly are arranged on the same mounting surface.

[0022] A second object of the present disclosure is to provide a battery, comprising the battery casing described in any one of the above.

[0023] The third object of the present disclosure is to provide a battery pack comprising the battery described above.

[0024] The fourth objective of the present disclosure is to provide an electrical device comprising the battery pack described above.

[0025] Through the above technical solution, through the pit with a depth greater than the height of the pole, when the battery is stacked on another battery, the pit can avoid the pole assembly of the other battery, and the pole assembly no longer occupies the installation space of the battery. One of the two installation surfaces of the battery will fit with the other of the two installation surfaces of the other battery. When the batteries are stacked, there is no gap between the batteries, which is more efficient in space utilization. The relative distance D between the two mounting surfaces satisfies: 0.1≤ / D≤0.8, so, / D is greater than or equal to 0.1 so that the depth of the pit The hole is not too small, so that the pole assembly can be completely accommodated in the hole and there is enough gap between the pole assembly, so as to avoid the contact between the pole assembly and the hole and cause a short circuit when the battery shakes. / D is less than or equal to 0.8, which prevents the pit from occupying too much space inside the shell in directions opposite to the two mounting surfaces, thereby avoiding affecting the battery capacity.

[0026] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0028] Figure 1 is a schematic structural diagram of a battery provided by an exemplary embodiment of the present disclosure;

[0029] Figure 2 yes Figure 1 A magnified view of part A;

[0030] Figure 3 is a schematic structural diagram of a battery provided by an exemplary embodiment of the present disclosure when stacked;

[0031] Figure 4 yes Figure 3 A magnified view of part B;

[0032] Figure 5 is a top view of a battery provided by an exemplary embodiment of the present disclosure;

[0033] Figure 6 yes Figure 5 Magnified view of part C.

[0034] Description of Reference Numerals

[0035] 1-shell, 11-bottom shell, 12-cover plate, 13-mounting surface, 2-pole assembly, 21-positive pole assembly, 22-negative pole assembly, 3-pit, 31-first pit, 32-second pit. DETAILED DESCRIPTION

[0036] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0037] In the present disclosure, unless otherwise stated, the directional words used generally refer to the relevant parts under normal use. "Inside and outside" can refer to the inside and outside of the outline of the corresponding part or its location inside or outside the environment, depending on the specific context. In addition, when the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and do not have order or importance.

[0038] like Figures 1 to 6As shown, the present disclosure provides a battery housing, including a housing 1 and a pole assembly 2, wherein the housing 1 has two mounting surfaces 13 arranged opposite to each other, the pole assembly 2 protrudes from one of the two mounting surfaces 13, and the other of the two mounting surfaces 13 is provided with a pit 3, which is used to avoid the pole assembly 2 of another battery when the battery is stacked on another battery, wherein the depth of the pit 3 is The relative distance D between the two mounting surfaces 13 satisfies: 0.1≤ / D≤0.8.

[0039] The pole assembly 2 in the battery is usually used for electrical connection, and the structure of the pole assembly 2 usually includes a portion arranged in the shell 1 and a portion exposed outside the shell 1. The portion of the pole assembly 2 arranged in the shell 1 is electrically connected to the pole core in the battery, and the portion of the pole assembly 2 exposed outside the shell 1 can be electrically connected to an external conductor or to the pole assembly 2 on an adjacent battery. When multiple batteries are stacked, the portion of the pole assembly 2 exposed outside the shell 1 will affect the arrangement of adjacent batteries, and the portion of the pole assembly 2 exposed outside the shell 1 will occupy the installation space of the battery, resulting in gaps between the batteries. In the process of assembling the batteries into a battery pack, the space in the battery pack is difficult to be fully utilized, and the capacity of the battery pack will be affected.

[0040] In this application, unless otherwise specified, the pole assembly 2 refers to the portion of the pole assembly 2 exposed outside the housing 1. Furthermore, the size of the pole assembly 2 refers to the size of the portion of the pole assembly 2 exposed outside the housing 1, that is, the width of the pole refers to the width of the portion of the pole assembly 2 exposed outside the housing 1. The height of the pole assembly 2 mentioned below refers to the height of the pole assembly 2. It refers to the height of the portion of the pole assembly 2 exposed outside the housing 1 .

[0041] Further Figure 1 Take the drawing direction as an example, Figure 1 In the figure, the dimension of the pole assembly 2 in the vertical direction (ie, the X direction) is the height of the pole. ,at the same time Figure 1 The up-down direction in FIG. 1 is also the direction in which the two mounting surfaces 13 are relative to each other, the thickness direction of the battery, and the depth direction of the pit 3 .

[0042] Through the above technical solution, through the pit 3 with a depth greater than the height of the pole, when a battery is stacked on another battery, the pit 3 can avoid the pole assembly 2 of the other battery, and the pole assembly 2 no longer occupies the installation space of the battery. One of the two installation surfaces 13 of the battery will fit with the other of the two installation surfaces 13 of the other battery. When the batteries are stacked, there is no gap between the batteries, which is more efficient in space utilization. The relative distance D between the two mounting surfaces 13 satisfies: 0.1≤ / D≤0.8, so, / D is greater than or equal to 0.1 so that the depth of the pit 3 The cavity 3 is not too small, so that the cavity 3 can completely accommodate the pole assembly 2 and leave enough space between the pole assembly 2, thereby preventing the pole assembly 2 from contacting the cavity 3 and causing a short circuit when the battery shakes. / D is less than or equal to 0.8, which prevents the pit 3 from occupying too much space inside the shell 1 in the directions opposite to the two mounting surfaces 13, thereby avoiding affecting the battery capacity.

[0043] In the present application, the batteries mentioned above and below may be blade batteries, which have a unique long and thin shape. For blade batteries, the length of the blade battery may be 400mm-1500mm, and the width of the blade battery may be 80mm-220mm. The thickness of the blade battery, i.e., the relative distance D between the two mounting surfaces 13, is generally 10mm-30mm. The depth of the pit 3 is The relative distance D between the two mounting surfaces 13 satisfies: 0.1≤ When / D≤0.8 (for example, refer to the schemes 1.2, 1.4 and 1.5 in Table 1 below), the depth of the pit 3 is It can be 3mm-15mm. The relative distance D between the two mounting surfaces 13 will not be too close, which prevents the pit 3 from occupying too much space inside the shell 1 in the direction opposite to the two mounting surfaces 13, thereby avoiding affecting the battery capacity.

[0044] When the relative distance D between the two mounting surfaces 13 is small, the space inside the housing 1 will be more compact. For example, when the relative distance D between the two mounting surfaces 13 is 10 mm-15 mm, the depth of the recess 3 is 3mm≤ <10mm, depth of pit 3 The relative distance D between the two mounting surfaces 13 can satisfy: 0.2≤ / D≤0.7. This makes the depth of the pit 3 Compared with the relative distance D between the two mounting surfaces 13, the depth of the pit 3 is more moderate. The difference between the relative distance D between the two mounting surfaces 13 is neither too large nor too small. The maximum value of is less than the minimum value of the relative distance D between the two mounting surfaces 13, avoiding the depth of the pit 3 Exceeding the relative distance D between the two mounting surfaces 13 results in the situation where the recess 3 and the housing 1 do not fit well. The relative distance D between the two mounting surfaces 13 can be 0.3≤ / D≤0.6, further avoiding the depth of pit 3 The difference in the relative distance D between the two mounting surfaces 13 is too small or too large.

[0045] When the relative distance D between the two mounting surfaces 13 is large, for example, when the relative distance D between the two mounting surfaces 13 is 15 mm < D ≤ 30 mm, the depth of the pit 3 is The depth of the pit 3 can be less than or equal to 15mm The relative distance D between the two mounting surfaces 13 can satisfy: 0.12≤ / D≤0.8. This makes the depth of the pit 3 Compared with the relative distance D between the two mounting surfaces 13, the depth of the pit 3 is more moderate. The difference between the relative distance D between the two mounting surfaces 13 is neither too large nor too small. The maximum value of is less than the minimum value of the relative distance D between the two mounting surfaces 13, avoiding the depth of the pit 3 Exceeding the relative distance D between the two mounting surfaces 13 results in the situation where the recess 3 and the housing 1 do not fit well. The relative distance D between the two mounting surfaces 13 can be 0.2≤ / D≤0.6, further avoiding the depth of pit 3 The difference in the relative distance D between the two mounting surfaces 13 is too small or too large.

[0046] In the related art, the pole assembly 2 is usually manufactured into an L shape and extends along the width direction of the housing 1. For details, please refer to Figures 1 to 6 The transverse part ensures that the pole assembly 2 has a sufficient cross-sectional area to ensure the current passing effect of the pole assembly 2, while the longitudinal part ensures the contact area when electrically connected to the external conductor and / or the pole assembly 2 on the adjacent battery, further ensuring the current passing effect of the pole assembly 2. Depth of the pit 3 Height to pole assembly 2 Can satisfy > This ensures that the pit 3 can avoid the pole assembly 2, and no interference occurs between the pit 3 and the pole assembly 2.

[0047] As described above, the longitudinal portion of the pole assembly 2 ensures the contact area when electrically connected to the external conductor and / or the pole assembly 2 on the adjacent battery, so as to ensure the overcurrent effect of the pole assembly 2. Can meet 2mm≤ ≤5mm. That is, the height of the portion of the pole assembly 2 exposed outside the housing 1 is greater than or equal to 2mm and less than or equal to 5mm. It is ensured that when the pole assembly 2 is electrically connected to the external conductor and / or to the pole assembly 2 on the adjacent battery, there is sufficient contact area on the pole assembly 2. Furthermore, considering the manufacturability and connection method of the pole assembly 2. The height of the pole assembly 2 Can meet 3mm≤ ≤5mm. The pole assembly 2 usually needs to be connected to the external conductor by welding. In order to ensure the strength of the welding, the height of the pole assembly 2 It can be greater than or equal to 3mm. At the same time, considering the manufacturability of the pole assembly 2, It can be less than or equal to 5 mm, which not only facilitates the manufacture of the pole assembly 2 but also limits the manufacturing cost of the pole assembly 2 and avoids the pole assembly 2 being too high so that the pole assembly 2 occupies too much volume.

[0048] It should be noted that, refer to Figures 1 to 6 The X direction represents the relative direction of the two mounting surfaces 13, which is also the depth direction of the pit 3 and the height direction of the pole assembly 2. The Y direction represents the length direction of the shell 1, which is also the width direction of the pit 3 and the width direction of the pole assembly 2. The Z direction represents the width direction of the shell 1, which is also the length direction of the pit 3 and the length direction of the pole assembly 2.

[0049] In the length direction of the shell 1, the size of the pit 3 Dimensions of pole assembly 2 Can meet: 0.5≤ / ≤0.85 (for example, refer to Schemes 2.3 and 2.4 in Table 2 below). It represents the width of the pit 3. It represents the width of the pole. In this way, the width of the pit 3 can be more moderate than the width of the pole assembly 2. If the width of the pit 3 is too wide, the space of the battery in the length direction will be lost, resulting in a decrease in the capacity of the battery and a decrease in the energy density. Therefore, within the manufacturable range of the pole assembly 2, the width of the pit 3 is designed to maximize the energy density of the battery. If the width of the pit 3 is too narrow, the difference between the width of the pit 3 and the width of the pole assembly 2 is too small, and the gap between the pit wall of the pit 3 and the pole assembly 2 is too small, making it easy for the hole wall of the pit 3 to contact the pole assembly 2 and cause a short circuit in the battery. In some embodiments, taking into account the actual use and manufacturability of the pole assembly 2, the width of the pole assembly 2 The width of the pit 3 can be 6 mm to 16 mm, which avoids the volume of the pole assembly 2 being too large and ensures the current capacity of the pole assembly 2. Can be 8mm≤ ≤20mm and > .

[0050] In the width direction of the housing 1, the size of the recess 3 Dimensions of pole assembly 2 Can meet: 0.3 ≤ / ≤0.8. At this time, represents the length of pit 3, It represents the length of the pole. In this way, the length of the pit 3 can be more moderate than the length of the pole assembly 2. If the length of the pit 3 is too long, the space of the battery in the width direction will be lost, resulting in a decrease in the capacity of the battery and a decrease in the energy density. Therefore, within the manufacturable range of the pole assembly 2, the width of the pit 3 is designed to maximize the energy density of the battery. If the length of the pit 3 is too short, the difference between the length of the pit 3 and the length of the pole assembly 2 is too small, and the gap between the pit wall of the pit 3 and the pole assembly 2 is too small, making it easy for the hole wall of the pit 3 to contact the pole assembly 2 and cause a short circuit in the battery. In some embodiments, taking into account the actual use of the pole assembly 2 and the manufacturable range, the width of the pole assembly 2 Can be 20mm-70mm and > This avoids the pole assembly 2 from being too large in size and also ensures the current-carrying capacity of the pole assembly 2 .

[0051] It should be explained that in the actual design and production of the battery, facing the different shapes of the pole assembly 2, the pit 3 may also be provided with a variety of shapes. , , as well as Unless otherwise specified, it refers to the corresponding maximum size, for example, It represents the maximum size of the pit 3 in the length direction of the shell 1. It represents the maximum size of the pole assembly 2 in the length direction of the housing 1. It represents the maximum size of the pit 3 in the width direction of the shell 1. It shows the maximum dimension of the pole assembly 2 in the width direction of the housing 1 .

[0052] Table 1 and Table 2 below show the size references of some battery housings, pole assemblies and other components.

[0053]

[0054] Table 1

[0055]

[0056] Table 2

[0057] The battery may also include a lead-out sheet. In the battery, a pole lug is formed at the end of the pole core. The lead-out sheet is connected to the pole lug and the pole column assembly 2 respectively. The pole column assembly 2 is electrically connected to the pole core through the lead-out sheet. Generally speaking, the pole lug and the lead-out sheet are connected by welding. When welding, it is necessary to ensure that there is a space with a size of more than 2 mm in the opposite direction of the two mounting surfaces 13 to accommodate the pole lug. For details, refer to Figure 2 , that is, in the X direction, the battery housing needs to have a tab accommodation space with a size of more than 2 mm, and the size of the tab accommodation space is Figure 2 Indicated as D- In this way, the tab is arranged in the tab accommodation space, and the tool used for welding can also contact the lead-out piece and the tab through the tab accommodation space, and the operator can weld the lead-out piece and the tab through the tab accommodation space.

[0058] When multiple batteries are stacked and multiple batteries need to be connected to form a battery pack, the pole assembly 2 of each battery also needs to be welded to the connecting piece. During welding, it is necessary to ensure that the pit 3 and the pole assembly 2 have a space of more than 1.5 mm in the direction opposite to the two mounting surfaces 13 to accommodate the connecting piece and the welding tool. For details, refer to Figure 2 That is, in the X direction, the battery housing needs to have a connection piece accommodating space with a size of more than 1.5 mm, and the size of the connection piece accommodating space is Figure 2 In the expression - In this way, the connecting piece is arranged in the connecting piece accommodating space, and the tool used for welding operation can also contact the connecting piece and the pole assembly 2 through the connecting piece accommodating space, and the operator can weld the connecting piece and the pole assembly 2 through the connecting piece accommodating space.

[0059] Referring to Table 1, in Scheme 1.6, D is 30 mm. / D should be greater than or equal to 0.2, and in solution 1.6, / D is only 0.07, D and The difference is too large and Very small and Less than , so that the pit 3 cannot accommodate the pole assembly 2. Continuing to refer to Table 1, in solution 1.2, D is 12 mm, / D should be greater than or equal to 0.3 and less than or equal to 0.5, while in solution 1.2, / D is 0.5, the depth of the pit 3 is 6mm, the size of the tab accommodation space is 6mm, and the size of the connecting piece accommodation space is 2mm, which meet the use conditions. In solution 1.3, D is 10mm, / D should be greater than or equal to 0.3 and less than or equal to 0.5, while in solution 1.3, / D is 0.9, the depth of pit 3 is 9 mm, The difference with D is too close, resulting in the size of the tab space being only 1mm, that is, D- The size does not meet the conditions for use.

[0060] It represents the width of the pit 3. It indicates the width of the pole. If the width of the pit 3 is too wide, the battery space in the length direction will be lost. If the width of the pit 3 is too narrow, the difference between the width of the pit 3 and the width of the pole assembly 2 is too small, and the gap between the pit wall of the pit 3 and the pole assembly 2 is too small, making it easy for the hole wall of the pit 3 to contact the pole assembly 2 and cause a short circuit in the battery. Therefore, it is necessary to design the width of the pit 3 within the manufacturable range of the pole assembly 2 so that the width of the pit 3 is appropriate.

[0061] To determine whether the battery has sufficient space in the length direction, the space utilization rate can be used. Here, the space utilization rate refers to the ratio of the relative distance between the pits at both ends of the battery to the length of the battery. If the length of the battery is represented by L, the space utilization rate can be expressed as (L-2 ) / The greater the space utilization, the better. In Table 2, the length of the batteries is 580 mm.

[0062] Referring to Table 2, in Table 2, the interference refers to whether there is interference between the pole assembly 2 and the pit 3 in the length direction of the battery. The interference can be expressed as ( - ) / , where the interference amount is also expressed in percentage. When the interference amount is greater than 100%, it means that there is interference between the pole assembly 2 and the pit 3, and the pit 3 cannot accommodate the pole assembly 2. When the interference amount is less than 100%, it means that there is no interference between the pole assembly 2 and the pit 3, and the pit 3 can accommodate the pole assembly 2.

[0063] Continuing to refer to Table 2, in Scheme 2.3, 6mm, 10mm, / is 0.6, the pit 3 can accommodate the pole assembly 2 while having a high space utilization rate. In solution 2.2, Less than In this way, although the space utilization rate is high, the pit 3 will interfere with the pole assembly 2 and cannot accommodate the pole assembly 2. In scheme 2.5, and The difference between them is relatively large, so although the pit 3 can accommodate the pole assembly 2, the space utilization is low.

[0064] In some embodiments, the pit 3 may penetrate the housing 1 in the width direction of the housing 1. In this way, the length of the pit 3 is equal to the width of the housing 1, and the through pit 3 will not affect the arrangement of electrical components in the housing 1, and it is also easier to process the pit 3.

[0065] The pole assembly 2 and the recess 3 can be respectively arranged at the ends of the battery in the length direction. In this way, after the batteries are stacked, the external conductor is more easily electrically connected to the pole assembly 2, and the pole assembly 2 between adjacent batteries is also easier to connect.

[0066] The housing 1 may include a bottom shell 11 and a cover plate 12 covering the bottom shell 11, wherein an end surface of the cover plate 12 away from the bottom shell 11 is formed as one of two mounting surfaces 13, and an end surface of the bottom shell 11 away from the cover plate 12 is formed as the other of the two mounting surfaces 13. Figure 4 When the batteries are stacked, the cover plate 12 of the battery will contact the bottom shell 11 of the adjacent battery, and the cover plate 12 can support the other battery.

[0067] The pole assembly 2 may include a positive pole assembly 21 and a negative pole assembly 22. The housing 1 may be formed with a first recess 31 corresponding to the positive pole assembly 21 and a second recess 32 corresponding to the negative pole assembly 22. Figure 1 , Figure 3 and Figure 5 The positive electrode column assembly 21 and the negative electrode column assembly 22 can be respectively arranged at both ends of the length direction of the battery. The positive electrode column assembly 21 and the negative electrode column assembly 22 can also be arranged on the same mounting surface 13, and continue to refer to Figure 1 , Figure 3 and Figure 5 At this time, the positive electrode column assembly 21 and the negative electrode column assembly 22 are respectively arranged on the cover plate 12.

[0068] According to a second aspect of the present disclosure, a battery is also provided, comprising a battery housing according to any one of the above embodiments, and having all the beneficial effects thereof, which will not be described in detail herein.

[0069] According to a third aspect of the present disclosure, there is also provided a battery pack, comprising a battery according to any one of the above embodiments, and having all the beneficial effects thereof, which will not be described in detail herein.

[0070] According to a fourth aspect of the present disclosure, there is also provided an electric device, including the above-mentioned battery pack, and having all its beneficial effects, which will not be described in detail here. The electric device here can be an electric device that requires a battery pack, such as a new energy electric vehicle.

[0071] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, the technical solution of the present disclosure can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present disclosure. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0072] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A battery casing, characterized in that: The battery comprises a housing and a pole assembly, wherein the housing has two mounting surfaces arranged opposite to each other, the pole assembly protrudes from one of the two mounting surfaces, and the other of the two mounting surfaces is provided with a pit for avoiding the pole assembly of the other battery when the battery is stacked on another battery, wherein the depth of the pit is The relative distance D between the two mounting surfaces satisfies: 0.1≤ / D≤0.

8.

2. The battery housing according to claim 1, characterized in that: 10mm≤D≤30mm,3mm≤ ≤15mm。 3. The battery housing according to claim 1, characterized in that: The depth of the pit The relative distance D between the two mounting surfaces satisfies: 0.2≤ / D≤0.7, where 10mm≤D≤15mm, 3mm≤ <10mm.

4. The battery housing according to claim 3, characterized in that: The depth of the pit The relative distance D between the two mounting surfaces satisfies: 0.3≤ / D≤0.

6.

5. The battery housing according to claim 2, characterized in that: The depth of the pit The relative distance D between the two mounting surfaces satisfies: 0.12≤ / D≤0.8, where 15mm<D≤30mm, ≤15mm.

6. The battery housing according to claim 5, characterized in that: The depth of the pit The relative distance D between the two mounting surfaces satisfies: 0.2≤ / D≤0.

6.

7. The battery housing according to any one of claims 1 to 6, characterized in that: The depth of the pit The height of the pole assembly satisfy > .

8. The battery housing according to claim 7, characterized in that: The height of the pole assembly Meet 2mm≤ ≤5mm.

9. The battery housing according to claim 1, characterized in that: In the length direction of the shell, the maximum size of the pit The maximum dimensions of the pole assembly Satisfaction: 0.5 ≤ / ≤0.

85.

10. The battery casing according to claim 1 or 9, characterized in that: In the length direction of the shell, the maximum size of the pit The maximum dimensions of the pole assembly satisfy: > , 8mm≤ ≤20mm, 6mm≤ ≤16mm.

11. The battery housing according to claim 1, characterized in that: In the width direction of the shell, the maximum size of the pit The maximum dimensions of the pole assembly Satisfy: 0.3 ≤ / ≤0.

8.

12. The battery casing according to claim 1 or 11, characterized in that: In the width direction of the shell, the maximum size of the pit The maximum dimensions of the pole assembly satisfy: > , 20mm≤ ≤70mm.

13. The battery housing according to claim 1, characterized in that: The recess penetrates the shell in the width direction of the shell.

14. The battery housing according to claim 1, characterized in that: The pole assembly and the recess are respectively arranged at the ends of the battery housing in the length direction.

15. The battery housing according to claim 1, characterized in that: The length of the battery shell is 400mm-1500mm, and the width of the battery shell is 80mm-220mm.

16. The battery housing according to claim 1, characterized in that: The shell includes a bottom shell and a cover plate covering the bottom shell, an end surface of the cover plate away from the bottom shell forms one of the two mounting surfaces, and an end surface of the bottom shell away from the cover plate forms the other of the two mounting surfaces.

17. The battery housing according to claim 1, characterized in that: The pole assembly includes a positive pole assembly and a negative pole assembly, and the shell is formed with a first recess corresponding to the positive pole assembly and a second recess corresponding to the negative pole assembly.

18. The battery housing according to claim 17, characterized in that: The positive electrode column assembly and the negative electrode column assembly are arranged on the same mounting surface.

19. A battery, characterized in that: A battery casing comprising any one of claims 1-18.

20. A battery pack, characterized in that: Comprising the battery as claimed in claim 19.

21. An electrical equipment, characterized in that: Comprising the battery pack as claimed in claim 20.

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