Battery, battery pack and electric device

Abstract

The application discloses a battery, comprising: a shell provided with a containing cavity and an opening communicating with the containing cavity; an electric core arranged in the containing cavity; and an end cover assembly comprising an end cover body and an explosion-proof valve, wherein the end cover body covers the opening, the end cover body is provided with a pressure relief hole communicating with the containing cavity, and the explosion-proof valve is sealed in the pressure relief hole; the electric core satisfies the relationship: 1.0mm 2 / Ah≤S1 / C1≤2.5mm 2 / Ah; 800Ah≤C1≤3000Ah; wherein S1 is the area of the cross section of the explosion-proof valve in the pressure relief direction, and C1 is the capacity of the electric core. Thus, the device can reduce the material quantity, the structural complexity and the material cost of the battery, and can also consider the pressure relief flowability and the structural stability of the battery. The application further discloses a battery pack and a power utilization equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery assembly, in particular to a battery, a battery pack and an electric device. BACKGROUND

[0002] An electric core is arranged in the battery for energy storage. In the related art, the capacity of the electric core is related to the size of various protection structures, connection structures and limiting structures on the corresponding end cover assembly. The capacity of the electric core is commonly 280 Ah. A large number of connecting pieces are required for system assembly in the subsequent grouping process of the electric core of this specification, which is high in cost and complex in assembly.

[0003] Based on the above problems, the following technical solutions are generated. SUMMARY

[0004] The embodiments of the present application disclose a battery, a battery pack and an electric device, which can solve the problem of high cost and complex assembly in the grouping process of the conventional electric core in the related art.

[0005] In order to achieve the above purpose, in a first aspect, the present application discloses a battery, comprising: a shell provided with a receiving cavity and an opening communicating with the receiving cavity; an electric core arranged in the receiving cavity; an end cover assembly comprising an end cover body and an explosion-proof valve, the end cover body covers the opening, the end cover body is provided with a pressure relief hole communicating with the receiving cavity, and the explosion-proof valve is sealed in the pressure relief hole; the electric core satisfies the relationship formula: 1.0 mm 2 / Ah≤S1 / C1≤2.5 mm 2 / Ah; 800 Ah≤C1≤3000 Ah; wherein S1 is the area of the cross section of the explosion-proof valve in the direction of pressure relief; and C1 is the capacity of the electric core.

[0006] Optionally, the electric core satisfies: 180 mm≤H1≤360 mm; wherein H1 is the height of the electric core; and the height direction of the electric core is in the direction of pressure relief.

[0007] Optionally, the explosion-proof valve satisfies: S1≥1200 mm 2 .

[0008] Optionally, the shell satisfies: 1 / 20≤M2 / W2≤1 / 3; M2≥50 mm; W2≥320 mm; H2≥180 mm; wherein M2 is the thickness of the shell; W2 is the length of the shell; H2 is the height of the shell; the thickness direction of the shell is in the second direction, the height direction of the shell is in the direction of pressure relief, the length direction of the shell is in the first direction, and the first direction, the second direction and the direction of pressure relief intersect with each other.

[0009] Optionally, the shell satisfies: 0.06≤M2 / W2≤0.3; 400 mm≤W2≤1000 mm; 60 mm≤M2≤120 mm.

[0010] Optionally, the end cover assembly further comprises pole posts, the pole posts are electrically connected with the battery cell, the pole posts are arranged on the end cover body, the pole posts are two in number, the explosion-proof valve is located between the two pole posts, the pole posts satisfy: 0.75≤L4 / W3≤0.90, or, 40mm≤W3-L4≤100mm; W3=W2; L4≥300mm; wherein, L4 is the center distance between the two pole posts; W3 is the length of the end cover body; the length direction of the end cover body is towards the first direction.

[0011] Optionally, the pole posts satisfy: D4 min ≥18mm; wherein, D4 min is the minimum diameter of the pole post.

[0012] Optionally, the end cover assembly further comprises pressing blocks; the pressing blocks are two in number, the pressing blocks are arranged on the end cover body, and the pressing blocks are sleeved on the pole posts; the pressing blocks satisfy: 0.75≤L5 / W3≤0.90; D5≥36mm; wherein, L5 is the center distance between the two pressing blocks; D5 is the side length or diameter of the pressing block.

[0013] Optionally, the end cover assembly further comprises an adapter, the adapter is arranged on the end cover body, the adapter is connected with the pole post, and the adapter is provided with a pin for connecting the battery cell, the pin satisfies: M7≥50mm; H7≥80mm; in the case that the pin is connected with the positive electrode of the battery cell, N7≥2.5mm; in the case that the pin is connected with the negative electrode of the battery cell, N7'≥1.5mm; wherein, M7 is the width of the pin, in mm; H7 is the length of the pin, in mm; N7 and N7' are the thickness of the pin, in mm; the width direction of the pin is towards the second direction, the length direction of the pin is towards the pressure relief direction, the thickness direction of the pin is towards the first direction, the first direction, the second direction and the pressure relief direction intersect with each other in pairs.

[0014] Optionally, the end cover body satisfies: 2mm≤H3≤4mm; wherein, H3 is the thickness of the end cover body; the thickness direction of the end cover body is towards the pressure relief direction.

[0015] Optionally, the shell satisfies: T2≥0.6mm; T2 is the wall thickness of the shell.

[0016] Optionally, the shell satisfies: 0.6mm≤T21≤1mm; 0.6mm≤T22≤1.2mm; 1.2mm≤T23≤2.5mm; T22>T21; T21 is the wall thickness of the large face of the shell; T22 is the wall thickness of the side face of the shell; T23 is the wall thickness of the bottom face of the shell; the bottom face of the shell and the battery cell are sequentially arranged along the pressure relief direction, the large face of the shell and the side face of the shell form a peripheral wall of the shell, and the peripheral wall of the shell is connected to the bottom face of the shell to form the accommodating cavity.

[0017] Optionally, the shell satisfies: V2≥8000000 mm3 V2 is the volume of the shell.

[0018] Optionally, the end cap assembly is provided with a liquid injection hole that communicates with the receiving cavity, and the liquid injection hole and the pressure relief hole are spaced apart; the liquid injection hole satisfies: D6≥5mm; where D6 is the diameter of the liquid injection hole.

[0019] Secondly, this application discloses a battery pack, including a battery.

[0020] Thirdly, this application discloses an electrical device, including a battery pack.

[0021] Compared with the prior art, the beneficial effects of this application are:

[0022] This application optimizes the battery design, specifically by including: a casing with a receiving cavity and an opening communicating with the receiving cavity; a battery cell disposed within the receiving cavity; and an end cap assembly including an end cap body and an explosion-proof valve, wherein the end cap body seals the opening, the end cap body has a pressure relief hole communicating with the receiving cavity, and the explosion-proof valve is sealed within the pressure relief hole; the battery cell satisfies the following formula: 1.0mm² 2 / Ah≤S1 / C1≤2.5mm 2 / Ah; 800Ah≤C1≤3000Ah; where S1 is the cross-sectional area of ​​the explosion-proof valve facing the pressure relief direction; C1 is the capacity of the battery cell.

[0023] In this application, by increasing the cell capacity to C1 ≥ 800Ah, the number of cells in a battery of the same volume is reduced. Correspondingly, the number of connecting components such as protective structures, connection structures, and limiting structures adapted to the cells is reduced. Thus, the amount of battery material, the complexity of the battery structure, and material costs can all be reduced. At the same time, the cell cannot be made infinitely large; therefore, the upper limit of the cell capacity is controlled, i.e., C1 ≤ 3000Ah, to improve the operability of the device in this application.

[0024] Simultaneously, while increasing the cell capacity C1, it is also necessary to ensure that the pressure relief area of ​​the explosion-proof valve is compatible with the cell capacity. Specifically, this is achieved by controlling S1 / C1 ≥ 1.0 mm. 2 / Ah ensures that the pressure relief area S1 of the explosion-proof valve is not too small relative to the cell capacity C1, allowing for sufficient gas and liquid discharge during cell expansion and thus guaranteeing pressure relief flow; and by controlling S1 / C1 ≤ 2.5mm 2 / Ah ensures that the pressure relief area S1 of the explosion-proof valve is not too large relative to the cell capacity C1, thereby avoiding affecting the overall strength of the end cap assembly and ensuring the structural stability of the battery.

[0025] In summary, the device of this application can reduce the amount of battery materials, the complexity of battery structure and material cost, while taking into account the pressure relief flow and structural stability of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without any creative effort based on these drawings also belong to the protection scope of the present application.

[0027] Figure 1 It is a whole structure diagram of a battery disclosed by the present application.

[0028] Figure 2 It is a front view of a battery disclosed by the present application.

[0029] Figure 3 It is an enlarged view of I of a battery disclosed by the present application. Figure 2

[0030] Figure 4 It is an enlarged view of II of a battery disclosed by the present application. Figure 2

[0031] Figure 5 It is a left view of a battery disclosed by the present application.

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 100 - shell,

[0034] 200 - battery cell,

[0035] 300 - end cover assembly,

[0036] 310 - end cover body, 320 - explosion-proof valve, 330 - pole, 340 - pressing block, 350 - liquid injection hole, 360 - adapter,

[0037] Z - pressure relief direction, X - first direction, Y - second direction. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the protection scope of the present application.

[0039] ​​In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0040] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms may also be used to indicate other meanings, for example, the term "upper" may also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific situation.

[0041] In addition, the terms "mounting", "setting", "provided with", "connected", "connected" should be broadly understood. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific situation.

[0042] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific type and structure may be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0043] In the related art, the capacity size of the battery cell is related to the size of various protective structures, connection structures and limiting structures on the corresponding end cover assembly. The current battery cell capacity is commonly 280Ah. The battery cell of this specification needs a large number of connecting pieces for system assembly in the subsequent grouping process, which is high in cost and complex in assembly. The technical solution of the present application is to solve such technical problems, which will be described below in combination with Figures 1-5 .

[0044] The present application discloses a battery, which can include a shell 100, a battery cell 200 and an end cover assembly 300. The shell 100 is the mounting base of the present application and provides shielding protection for other parts, while the battery cell 200 is the energy storage core component of the battery to realize the transmission of electric energy. Specifically, the shell 100 can be provided with a receiving cavity and an opening communicating with the receiving cavity, and the battery cell 200 is arranged in the receiving cavity.

[0045] The end cover assembly 300 can include an end cover body 310 and an explosion-proof valve 320. The end cover body 310 covers the opening to prevent external contaminants from polluting the inside of the battery. The end cover body 310 is provided with a pressure relief hole communicating with the containing cavity, and the explosion-proof valve 320 is sealed in the pressure relief hole. Specifically, when the battery is working normally, the internal pressure of the battery is normal, and the explosion-proof valve 320 also normally seals the pressure relief hole. When the battery expands and the pressure rises, the excessive pressure will break the explosion-proof valve 320, and the expanded gas and liquid can be discharged through the pressure relief hole to achieve pressure relief and ensure the safety performance of the battery.

[0046] The battery cell 200 can satisfy the relationship: 1.0mm 2 / Ah≤S1 / C1≤2.5mm 2 / Ah; for example, S1 / C1=1.0mm 2 / Ah, 1.5mm 2 / Ah, 2mm 2 / Ah, 2.5mm 2 / Ah, etc. And 800Ah≤C1≤3000Ah, such as C1=800Ah, 1000Ah, 1500Ah, 2000Ah, 2500Ah, 3000Ah, etc. Among them, S1 is the cross-sectional area of the explosion-proof valve 320 facing the pressure relief direction Z, that is, the pressure relief area of the explosion-proof valve 320; C1 is the capacity of the battery cell 200.

[0047] In this application, by increasing the capacity of the battery cell 200 to C1≥800Ah, the number of battery cells 200 in the same volume of battery is reduced, and accordingly, the number of connecting parts such as protective structures, connecting structures, and limiting structures that are adapted to the battery cell 200 will be reduced. In this way, the amount of materials, the complexity of the battery structure, and the cost of materials of the battery can be reduced. At the same time, the capacity of the battery cell 200 cannot be increased indefinitely, so the upper limit of the capacity of the battery cell 200 is controlled, that is, C1≤3000Ah, to improve the operability of the device of the present application.

[0048] At the same time, when the capacity C1 of the battery cell 200 is increased, it is also necessary to ensure that the pressure relief area of the explosion-proof valve 320 is adapted to the capacity of the battery cell 200. Specifically, by controlling S1 / C1≥1.0mm 2 / Ah, the pressure relief area S1 of the explosion-proof valve 320 relative to the capacity C1 of the battery cell 200 is not too small, so that the gas and liquid can be fully discharged when the battery cell 200 expands, thereby ensuring the pressure relief flowability; and by controlling S1 / C1≤2.5mm 2 / Ah, the pressure relief area S1 of the explosion-proof valve 320 relative to the capacity C1 of the battery cell 200 is not too large, thereby avoiding affecting the overall strength of the end cover assembly 300 to ensure the structural stability of the battery.

[0049] In summary, the device of the application can reduce the material quantity, battery structure complexity and material cost of the battery, while taking into account the pressure relief flowability and structural stability of the battery.

[0050] Optionally, the electric core 200 can satisfy: 180mm≤H1≤360mm; such as H1=180mm, 240mm, 300mm, 360mm, etc. Wherein, H1 is the height of the electric core 200; the height direction of the electric core 200 is towards the pressure relief direction Z. In this way, the specification of the electric core 200 is more suitable for square batteries, and meets the installation needs of square batteries.

[0051] Optionally, the explosion-proof valve 320 can satisfy: S1≥1200mm 2 , such as S1=1200mm 2 , 1500mm 2 , 1800mm 2 , etc., so that when the electric core 200 expands, the explosion-proof valve 320 can provide sufficient pressure relief area S1 to ensure smooth discharge of the expanded gas-liquid.

[0052] Optionally, the shell 100 can satisfy: 1 / 20≤M2 / W2≤1 / 3; such as M2 / W2=1 / 20, 1 / 10, 1 / 5, 1 / 3, etc. M2≥50mm; W2≥320mm; H2≥180mm. Wherein, M2 is the thickness of the shell 100; W2 is the length of the shell 100; H2 is the height of the shell 100; the thickness direction of the shell 100 is towards the second direction Y, the height direction of the shell 100 is towards the pressure relief direction Z, and the length direction of the shell 100 is towards the first direction X, and the first direction X, the second direction Y and the pressure relief direction Z intersect with each other.

[0053] In this way, by controlling the length W2, height H2 and thickness M2 of the shell 100, the shape and specification of the shell 100 are controlled, thereby forming corresponding constraints on the number, specification, etc. of the electric core 200 installed in the shell 100, and then controlling the total capacity (i.e. the sum of the capacities C1 of each electric core 200) and energy density of the electric core 200, while meeting the capacity demand of the battery, preventing unlimited enlargement beyond the capacity limit of the battery, so that the battery takes into account safety and stable conduction.

[0054] Optionally, the shell 100 can satisfy: 0.06≤M2 / W2≤0.3; such as M2 / W2=0.06, 0.1, 0.2, 0.3, etc. 400mm≤W2≤1000mm; such as W2=400mm, 600mm, 800mm, 1000mm, etc. 60mm≤M2≤120mm, such as M2=60mm, 80mm, 100mm, 120mm, etc. In this way, the shape and size of the shell 100 can be further controlled, so that the total capacity and energy density of the battery cell 200 are better constrained, and the battery can further balance safety and stable conduction.

[0055] Optionally, the end cover assembly 300 can further include a pole 330 electrically connected to the battery cell 200, thereby forming a conduction loop to enable the battery to conduct electricity. The pole 330 is provided on the end cover body 310, and the pole 330 is two in number, and the explosion-proof valve 320 is located between the two poles 330.

[0056] The pole 330 can satisfy: 0.75≤L4 / W3≤0.90, such as L4 / W3=0.75, 0.8, 0.9, etc. Alternatively, 40mm≤W3-L4≤100mm; such as W3-L4=40mm, 60mm, 80mm, 100mm, etc. W3=W2; L4≥300mm. Wherein, L4 is the center distance between the two poles 330; W3 is the length of the end cover body 310; the length direction of the end cover body 310 is towards the first direction X.

[0057] In the arrangement of the pole 330, the center distance L4 between the two poles 330 needs to be wide enough, which on the one hand can ensure the stability of the conduction loop formed between the pole 330 and the external electrical connection device, and on the other hand can leave enough space for the processing and installation of the explosion-proof valve 320 and the liquid injection hole on the end cover body 310, thereby improving the molding yield. At the same time, the center distance L4 between the two poles 330 cannot be too large, avoiding being too close to the edge of the end cover body 310, affecting the strength of the edge position of the end cover body 310, and occupying the position of other components, such as the adapter 360 and the pin 361 in the following.

[0058] Therefore, the relative position relationship between the center distance L4 of the pole 330 and the length W3 of the end cover body 310 is controlled according to the above 0.75≤L4 / W3≤0.90, or 40mm≤W3-L4≤100mm, so that the arrangement of the pole 330 can avoid installation interference with other components while ensuring sufficient strength of the end cover body 310, thereby ensuring the stability of the end cover assembly 300 without deformation.

[0059] And the length W3 of the end cover body 310 is equal to the length W2 of the shell 100, so that the end cover assembly 300 can effectively cover the shell 100 and avoid waste of excess material.

[0060] Optionally, the pole column 330 can satisfy: D4 min ≥18mm; wherein, D4 min is the minimum diameter of the pole column 330. In this way, the flow area of the pole column 330 can be ensured, and the conductivity of the battery can be ensured.

[0061] Optionally, the end cover assembly 300 can further include a pressing block 340; the pressing block 340 is two, and the pressing block 340 is arranged on the end cover body 310 and is sleeved on the pole column 330; the pressing block 340 can satisfy: 0.75≤L5 / W3≤0.90; such as L5 / W3=0.75, 0.8, 0.9, etc. D5≥36mm; wherein, L5 is the center distance between the two pressing blocks 340; D5 is the side length or diameter of the pressing block 340.

[0062] In this way, by controlling the relative position relationship between the center distance L5 of the pressing block 340 and the length W3 of the end cover body 310, the design of the pressing block 340 not only can reinforce the end cover assembly 300 to ensure the structural stability of the end cover assembly 300, but also can be adapted to the size of the center distance L4 of the pole column 330, so as to fully protect the pole column 330.

[0063] And by controlling the side length or diameter D5 of the pressing block 340, the pressing block 340 has enough welding area with the busbar connected to the external module, which can meet the flow requirement of the battery, so as to ensure the conductivity.

[0064] Optionally, the end cover assembly 300 can further include an adapter 360, the adapter 360 is arranged on the end cover body 310, the adapter 360 is connected to the pole column 330, and the adapter 360 is provided with a pin 361 for connecting the battery cell 200. The pin 361 can satisfy: M7≥50mm; H7≥80mm.

[0065] And usually, the two pole columns 330 are the positive pole column and the negative pole column of the battery, and similarly, the battery cell 200 also has corresponding positive and negative poles, and the adapter 360 also has two corresponding adapters, one of which is connected to the positive pole column and the positive pole of the battery cell 200, and the other is connected to the negative pole column and the negative pole of the battery cell 200.

[0066] Among them, the adapter 360 for connecting the positive pole of the battery cell 200 is made of aluminum, and the adapter 360 for connecting the negative pole of the battery cell 200 is made of copper, and considering that the flow capacity of copper and aluminum is different, the pin 361 can further satisfy:

[0067] In the case that the pin 361 is connected to the positive pole of the battery cell 200, N7≥2.5mm; in the case that the pin 361 is connected to the negative pole of the battery cell 200, N7'≥1.5mm.

[0068] wherein, M7 is the width of the pin 361; H7 is the length of the pin 361; N7 and N7' are the thickness of the pin 361; the width direction of the pin 361 is towards the second direction Y, the length direction of the pin 361 is towards the pressure relief direction Z, the thickness direction of the pin 361 is towards the first direction X, and the first direction X, the second direction Y and the pressure relief direction Z are perpendicular to each other.

[0069] In this way, the overcurrent capacity of the pin 361 can be fully guaranteed, and the adapter 360 can play a good conductive role between the positive pole and the positive pole of the battery cell 200, and between the negative pole and the negative pole of the battery cell 200.

[0070] Optionally, the end cover body 310 can satisfy: 2mm≤H3≤4mm; for example, H3=2mm, 3mm, 4mm, etc. Wherein, H3 is the thickness of the end cover body 310; the thickness direction of the end cover body 310 is towards the pressure relief direction Z.

[0071] If the thickness of the end cover body 310 is too thin, it is not conducive to guarantee the structural stability of the end cover assembly 300, and if the thickness is too thick, material waste will occur, so according to the above size control, the end cover body 310 can balance the strength performance and save material cost.

[0072] Optionally, the shell 100 can satisfy: T2≥0.6mm; T2 is the wall thickness of the shell 100. In this way, the shell 100 has sufficient strength and effectively prevents deformation due to impact.

[0073] Optionally, the shell 100 can satisfy:

[0074] 0.6mm≤T21≤1mm; for example, T21=0.5mm, 0.8mm, 1mm, etc.

[0075] 0.6mm≤T22≤1.2mm; for example, T22=0.6mm, 0.8mm, 1mm, 1.2mm, etc.

[0076] 1.2mm≤T23≤2.5mm; for example, T23=1.2mm, 1.5mm, 1.8mm, 2.5mm, etc.

[0077] T22>T21.

[0078] T21 is the wall thickness of the large face of the shell 100; T22 is the wall thickness of the side face of the shell 100; and T23 is the wall thickness of the bottom face of the shell 100. The bottom face of the shell 100 is arranged along the pressure relief direction Z in sequence with the battery cell 200, and the large face of the shell 100 and the side face of the shell 100 enclose the peripheral wall of the shell 100, which is connected to the bottom face of the shell 100 to form the accommodating cavity. In this way, the structural strength of the shell 100 can be further improved to prevent damage and deformation caused by bumps.

[0079] Optionally, the shell 100 can satisfy: V2≥8000000 mm 3 ; and V2 is the volume of the shell 100. In this way, a sufficient number of battery cells 200 can be accommodated in the shell 100, thereby enabling the battery to have sufficient capacity.

[0080] Optionally, the end cover assembly 300 can be provided with a liquid injection hole 350 communicating with the accommodating cavity, and the liquid injection hole 350 is arranged in spaced relation to the pressure relief hole; the liquid injection hole 350 can satisfy: D6≥5mm; wherein D6 is the diameter of the liquid injection hole 350. The liquid injection hole 350 is used to inject electrolyte into the interior of the battery, and by controlling the above-mentioned size, the liquid injection hole 350 has sufficient flow area, thereby satisfying the liquid injection capacity and improving the liquid injection efficiency.

[0081] The application also discloses a battery pack, which can be the above-mentioned battery.

[0082] The application also discloses a power consumption device, which can include the above-mentioned battery pack. For example, the power consumption device is an electric vehicle, a ship, a spacecraft, a computer, etc.

[0083] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, and not to limit them; although the application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A battery, characterized by, The application relates to a battery shell and a battery. The battery shell comprises a shell (100) provided with a containing cavity and an opening communicating with the containing cavity; an electric core (200) arranged in the containing cavity; and an end cover assembly (300) comprising an end cover body (310), an explosion-proof valve (320) and a pole (330); the end cover body (310) covers the opening, the end cover body (310) is provided with a pressure relief hole communicating with the containing cavity, the explosion-proof valve (320) is sealed in the pressure relief hole, the pole (330) is electrically connected with the electric core (200), the pole (330) is arranged in the end cover body (310), the pole (330) is two in number, and the explosion-proof valve (320) is located between the two poles (330). The shell (100) satisfies the following conditions: 0.06<=M2 / W2<=0.3; 400mm<=W2<=1000mm; 60mm<=M2<=120mm; and H2>=180mm. The pole (330) satisfies the following conditions: 0.75<=L4 / W3<=0.90 or 40mm<=W3-L4<=100mm; W3=W2; and L4>=300mm. The electric core (200) satisfies the relationship: 1.0mm 2 / Ah≤S1 / C1≤1.5mm 2 / Ah; 800Ah≤C1≤3000Ah; S1 is the area of the cross section of the explosion-proof valve (320) in the pressure relief direction (Z); C1 is the capacity of the electric core (200); M2 is the thickness of the shell (100); W2 is the length of the shell (100); H2 is the height of the shell (100); L4 is the center distance between the two poles (330); and W3 is the length of the end cover body (310). The thickness direction of the shell (100) is towards a second direction (Y), the height direction of the shell (100) is towards the pressure relief direction (Z), the length direction of the shell (100) is towards a first direction (X), the first direction (X), the second direction (Y) and the pressure relief direction (Z) are all intersected with each other, and the length direction of the end cover body (310) is towards the first direction (X). The electric core (200) satisfies the following condition: 180mm<=H1<=360mm. H1 is the height of the electric core (200). The height direction of the electric core (200) is towards the pressure relief direction (Z). The explosion-proof valve (320) satisfies the following condition: The pole (330) satisfies the following condition:

2. The battery of claim 1, wherein, The end cover assembly (300) further comprises a pressing block (340); the pressing block (340) is two in number, the pressing block (340) is arranged in the end cover body (310) and is sleeved on the pole (330); and the pressing block (340) satisfies the following condition: 0.75<=L5 / W3<=0.

90. D5>=36mm. L5 is the center distance between the two pressing blocks (340); and D5 is the side length or diameter of the pressing block (340).

3. The battery of claim 1, wherein, The end cover assembly (300) further comprises an adapter (360) arranged in the end cover body (310), the adapter (360) is connected with the pole (330), and the adapter (360) is provided with a pin (361) for connecting the electric core (200); and the pin (361) satisfies the following condition: S1≥ 1200 mm 2 .

4. The battery of claim 1, wherein, ​ D4 min ≥ 18 mm; where D4 min is the minimum diameter of the pole (330).

5. The battery of claim 1, wherein, ​ ​ ​ ​ 6. The battery of claim 1, wherein, ​ M7≥50mm; H7≥80mm; In the case that the pin (361) is connected to the positive electrode of the battery cell (200), N7≥2.5mm; In the case that the pin (361) is connected to the negative electrode of the battery cell (200), N7'≥1.5mm; wherein M7 is the width of the pin (361); H7 is the length of the pin (361); N7 and N7' are the thickness of the pin (361); The width direction of the pin (361) is towards the second direction (Y), the length direction of the pin (361) is towards the pressure relief direction (Z), the thickness direction of the pin (361) is towards the first direction (X), and the first direction (X), the second direction (Y), and the pressure relief direction (Z) intersect with each other.

7. The battery of any one of claims 1-6, wherein, The end cover body (310) satisfies: 2mm≤H3≤4mm; wherein H3 is the thickness of the end cover body (310); The thickness direction of the end cover body (310) is towards the pressure relief direction (Z).

8. The battery of any one of claims 1-6, wherein, The shell (100) satisfies: T2≥0.6mm; T2 is the wall thickness of the shell (100).

9. The battery of claim 8, wherein, The shell (100) satisfies: 0.6mm≤T21≤1mm; 0.6mm≤T22≤1.2mm; 1.2mm≤T23≤2.5mm; T22>T21; T21 is the wall thickness of the large face of the shell (100); T22 is the wall thickness of the side face of the shell (100); T23 is the wall thickness of the bottom face of the shell (100); The bottom face of the shell (100) and the battery cell (200) are sequentially arranged along the pressure relief direction (Z), the large face of the shell (100) and the side face of the shell (100) form a peripheral wall of the shell (100), and the peripheral wall of the shell (100) is connected to the bottom face of the shell (100) to form the accommodating cavity.

10. The battery of any one of claims 1-6, wherein, The shell (100) satisfies: V2≥ 8000000 mm 3 ; V2 is the volume of the shell (100).

11. The battery of any one of claims 1-6, wherein, The end cover assembly (300) is provided with a liquid injection hole (350) communicating with the accommodating cavity, and the liquid injection hole (350) is arranged in a spaced manner with the pressure relief hole; the liquid injection hole (350) satisfies: D6≥5mm; wherein D6 is the diameter of the liquid injection hole (350).

12. A battery pack, characterized by, The battery of any one of claims 1-11.

13. An electrical device, characterized by The battery pack of claim 12.

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