Battery shell and battery

Abstract

The invention provides a battery shell and a battery, and belongs to the field of new energy. The number of the bosses is at least one, each boss is arranged on the upper surface of the shell, and the sum of the upper surface areas of all the bosses accounts for 25%-50% of the surface area of the upper surface of the shell; the number of the radiating ribs is multiple, and a plurality of radiating ribs are arranged on each boss; the sum of the upper surface areas of all the radiating ribs is 5%-45% of the sum of the upper surface areas of all the bosses. The invention aims to solve the problem that a battery shell in the prior art is poor in heat dissipation effect and cannot meet the quick charging requirement of a battery. The technical effects are that the heat dissipation effect is guaranteed, and the fast charging requirement of the battery can be met.

Description

Technical Field

[0001] This invention relates to the field of new energy technology, and more particularly to a battery casing and a battery. Background Technology

[0002] During actual battery use, due to the characteristics of internal electrochemical reactions, a large amount of local heat accumulation is likely to occur in areas where current is concentrated. However, most existing battery casings adopt a closed or semi-closed structure, which has limited heat dissipation effect. Heat is difficult to dissipate, resulting in high battery temperature, which in turn leads to a decrease in battery charging and discharging efficiency, an accelerated rate of capacity decay, and affects the normal service life.

[0003] Currently, as the market share of high-rate fast charging technology gradually increases, the heat dissipation and temperature of high-rate fast charging batteries have also attracted much attention. However, high-rate fast charging technology generates more heat during charging and discharging, resulting in higher battery temperatures. The heat dissipation performance of existing battery casing structures is limited and can no longer meet the requirements of fast charging systems. Summary of the Invention

[0004] This invention provides a battery case to solve the defects of existing battery cases that have poor heat dissipation and cannot meet the requirements of fast charging, and to achieve a battery case that can ensure heat dissipation and meet the requirements of fast charging.

[0005] The first aspect of the present invention provides a battery casing, comprising: case; A boss, at least one boss, each boss being disposed on the upper surface of the housing, the sum of the upper surface areas of all the bosses being between 25% and 50% of the surface area of ​​the upper surface of the housing; There are multiple heat dissipation fins, and each boss has multiple heat dissipation fins; the total upper surface area of ​​all heat dissipation fins is between 5% and 45% of the total upper surface area of ​​all bosses.

[0006] In addition, the battery casing according to the present invention may also have the following additional technical features: In some embodiments of the present invention, each heat dissipation fin is formed by connecting straight line segments with semicircular ends and parallel middle. Multiple heat dissipation fins are arranged concentrically on each boss.

[0007] In some embodiments of the present invention, the top wall thickness of each boss is T, where 1.5mm≤T≤2.5mm; The length of each boss is L, and 60mm≤L≤150mm; The width of each boss is W, where 22mm ≤ W ≤ 55mm.

[0008] In some embodiments of the present invention, the thickness of each heat dissipation fin 3 is h, where 0.5T≤h≤2.0T; The width of each heat dissipation fin is 'a', where 0.6mm ≤ a ≤ 2.5mm.

[0009] In some embodiments of the present invention, it further includes: The explosion-proof valve is installed on the top of the housing, with two bosses located on either side of the valve.

[0010] In some embodiments of the present invention, the total width of all heat dissipation fins is 8% to 40% of the total length of all bosses in the left-right direction.

[0011] In some embodiments of the present invention, it further includes: There are two reinforcing ribs, both of which are installed on the top of the housing. The two reinforcing ribs are located at both ends in the front and rear directions of the explosion-proof valve, and are located between the two bosses.

[0012] In some embodiments of the present invention, it further includes: Plastic, there are two plastic parts, both of which are placed on the upper surface of the shell; There are two poles, each connected to the housing by a plastic strip, and two protrusions are located between the two poles.

[0013] In some embodiments of the present invention, it further includes: An insulating rib is provided between each boss and its corresponding pole post.

[0014] A second aspect of the present invention provides a battery that includes all the technical features of the battery casing of the first aspect of the present invention.

[0015] In summary, this application includes the following beneficial technical effects: the arrangement of multiple heat dissipation fins and protrusions can effectively increase the contact area between the battery and the air, thereby increasing the heat dissipation effect of the battery casing. In addition, when the PACK cooling plate is placed on the heat dissipation fins, the arrangement of multiple heat dissipation fins can change the cold transfer of the cooling plate from the traditional single plane contact with the cooling plate to the contact of the concave and convex surfaces with the cooling plate, thus changing the cold transfer from planar transfer to three-dimensional spatial transfer. This allows the sides and surfaces of the heat dissipation fins to participate in the transfer, thereby effectively increasing the heat absorption efficiency of the cooling plate and the heat dissipation efficiency of the battery, ensuring the heat dissipation effect of the battery casing, and effectively improving the fast charging performance of the battery. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0017] Figure 1 A perspective view schematically showing that the heat dissipation ribs of the battery casing according to some embodiments of the present invention are concave ribs.

[0018] Figure 2 A schematic plan view of a battery casing with concave heat dissipation ribs according to some embodiments of the present invention is shown.

[0019] Figure 3 A perspective view schematically illustrating that the heat dissipation ribs of a battery casing according to some embodiments of the present invention are raised ribs.

[0020] Figure 4 A schematic plan view of a battery casing with raised heat dissipation ribs according to some embodiments of the present invention is shown.

[0021] Figure label: 1. Housing, 2. Boss, 3. Heat dissipation fin, 4. Reinforcing fin, 5. Insulating fin, 6. Plastic, 7. Terminal post, 8. Explosion-proof valve, 9. Liquid injection hole. Detailed Implementation

[0022] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0023] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “” used herein may also indicate the inclusion of the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated, unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0024] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0025] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may also be rotated 90 degrees or in other orientations, and the spatial relative descriptors used in the text will be interpreted accordingly.

[0026] like Figures 1 to 4 As shown, according to an embodiment of the first aspect of the present invention, a battery casing is provided, including a casing 1, a boss 2 and heat dissipation ribs 3. The upper surface of the casing 1 is provided with at least one boss 2, and each boss 2 is provided with a plurality of heat dissipation ribs 3. The sum of the upper surface areas of all the bosses 2 is between 25% and 50% of the surface area of ​​the upper surface of the casing 1; the sum of the upper surface areas of all the heat dissipation ribs 3 is between 5% and 45% of the sum of the upper surface areas of all the bosses 2.

[0027] In the above embodiments, it should be noted that the heat dissipation rib 3 is either a convex rib or a concave rib; The total area of ​​the upper surface of all the bosses 2 is S, the area of ​​the upper surface of the shell 1 is S1, and the area of ​​the upper surface of all the heat dissipation fins 3 is S0; at this time, 25%≤S / S1≤50%; 5%≤S0 / S≤45%.

[0028] Preferably, S / S1 equals 25%, 30%, 35%, 40%, 45% or 50%; S0 / S equals 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40% or 45%.

[0029] It also includes a liquid injection hole 9, on which a liquid injection hole 9 is provided. The liquid injection hole 9 is connected to the inside of the housing 1. The boss 2 and the housing 1 are integrally formed.

[0030] Each boss 2 is integrally formed after being bent relative to the shell.

[0031] The cooling components, i.e., the cooling plates, inside the battery pack are located on the upper surface of the heat dissipation ribs 3. When the heat dissipation ribs 3 are convex ribs, the cooling components, i.e., the cooling plates, inside the battery pack cover multiple convex ribs. In this case, the convex ribs serve as supporting components. When the heat dissipation ribs 3 are concave ribs, the cooling components, i.e., the cooling plates, inside the battery pack cover multiple concave ribs. In this case, the bosses 2 serve as supporting components.

[0032] A through hole is provided at the end of the housing 1 that is away from the boss 2.

[0033] When heat dissipation fins 3 are installed, the proportion of the structural adhesive bonding area between the boss 2 and the cooling plate increases by 3-25%, thereby increasing the heat dissipation effect.

[0034] The heat dissipation fins 3 of each boss 2 can be arranged in a reciprocating wave pattern or in a straight line pattern at equal intervals; they can also be arranged in the form of rings.

[0035] The technical effects achieved by the above embodiments are as follows: the arrangement of multiple heat dissipation fins 3 in conjunction with the protrusions 2 can effectively increase the contact area between the battery and the air, thereby increasing the heat dissipation effect of the battery casing 1. In addition, when the PACK cooling plate is placed on the heat dissipation fins 3, the arrangement of multiple heat dissipation fins 3 can change the cold transfer of the cooling plate from the traditional single plane contact with the cooling plate to the contact between the concave and convex surfaces with the cooling plate, thereby changing the cold transfer from planar transfer to three-dimensional spatial transfer, so that the sides and surfaces of the heat dissipation fins 3 participate in the transfer, thereby effectively increasing the heat absorption efficiency of the cooling plate and the heat dissipation efficiency of the battery, ensuring the heat dissipation effect of the battery casing, and effectively improving the fast charging performance of the battery.

[0036] The total area of ​​the upper surface of all the bosses 2 is S, the area of ​​the upper surface of the shell 1 is S1, and the area of ​​the upper surface of all the heat dissipation fins 3 is S0. At this time, the setting of 25%≤S / S1≤50% and 5%≤S0 / S≤45% can ensure the effective laying of the heat dissipation fins 3 and ensure the heat dissipation effect, while avoiding the bosses 2 occupying too much space and affecting the arrangement of the poles 7 and explosion-proof valves 8 on the upper surface of the shell 1.

[0037] Optional, such as Figures 1 to 4 As shown, each heat dissipation rib 3 is formed by connecting straight lines with semicircles at both ends and parallel lines in the middle, and multiple heat dissipation ribs 3 are arranged concentrically on each boss 2.

[0038] In the above optional embodiments, it should be noted that multiple heat dissipation fins 3 on each boss 2 are arranged sequentially from the inside to the outside along the center.

[0039] On each boss 2, the distance between any two adjacent heat dissipation fins 3 is b, where 1mm≤b≤2.5mm; the distance b between any two adjacent heat dissipation fins 3 can be 1mm, 1.2mm, 1.3mm, 1.4mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm or 2.5mm.

[0040] The advantages of the above optional embodiments are as follows: the multiple heat dissipation ribs 3 are all connected by straight line segments with semicircles at both ends and parallel in the middle, and the arrangement of multiple heat dissipation ribs 3 concentrically on each boss 2 can increase the convenience of processing the housing 1.

[0041] Optional, such as Figures 1 to 4 As shown, the top wall thickness of each boss 2 is T, 1.5mm≤T≤2.5mm; the length of each boss 2 is L, 60mm≤L≤150mm; and the width of each boss 2 is W, 22mm≤W≤55mm.

[0042] In the above optional embodiments, it should be noted that the height of the boss 2 is between 1.5mm and 4mm, the length of the housing 1 is between 145mm and 320mm, and the width of the housing 1 is between 25mm and 80mm.

[0043] Preferably, the wall thickness T of the boss 2 can be 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, or 2.5mm, etc.; L can be 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 130mm, or 135mm. The width W of the boss 2 can be 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, 31mm, 33mm, 35mm, 36mm, 37mm, 38mm, 39mm, 40mm, 41mm, 43mm, 45mm, 46mm, 47mm, 48mm, 49mm, 50mm, 51mm, 53mm, or 55mm, etc.

[0044] The advantages of the above optional embodiments are: by limiting the size of the boss 2, the processing difficulty of the boss 2 is reduced, and the support and heat dissipation performance of the boss 2 are guaranteed, thereby increasing the heat dissipation effect of the housing 1 and increasing the support strength of the housing 1.

[0045] Optional, such as Figures 1 to 4 As shown, the thickness of each heat dissipation fin 3 is h, 0.5T≤h≤2.0T; the width of each heat dissipation fin 3 is a, 0.6mm≤a≤2.5mm.

[0046] In the above optional embodiments, it should be noted that 0.5T≤h≤2.0T, i.e. 0.75mm≤h≤5mm; when the heat dissipation rib 3 is a raised rib, the thickness h of the heat dissipation rib 3 refers to the thickness of the raised rib, i.e., the thickness between the surface of the heat dissipation rib 3 away from the boss 2 and the surface of the boss 2; when the heat dissipation rib 3 is a concave rib, i.e., the heat dissipation rib 3 is recessed relative to the boss 2, the thickness h of the heat dissipation rib 3 refers to the thickness of the concave rib, i.e., the height between the bottom surface of the concave rib and the surface of the boss 2, which is also the depth of the concave rib.

[0047] Preferably, the thickness h of the heat dissipation fin 3 can be 0.75mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm or 2.5mm, etc.

[0048] The width 'a' of the heat dissipation fin 3 can be 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, or 2.5mm, etc.

[0049] The advantages of the above optional embodiments are: by limiting the size of the heat dissipation fins 3, the heat dissipation effect of the battery case can be further guaranteed.

[0050] Optional, such as Figures 1 to 4 As shown, it also includes an explosion-proof valve 8, and there are two bosses 2. The explosion-proof valve 8 is installed on the top of the housing 1, and the two bosses 2 are located on both sides of the explosion-proof valve 8.

[0051] In the above optional embodiments, it should be noted that the length, width, height and shape of the two bosses 2 are the same.

[0052] The distance between the explosion-proof valve 8 and the boss 2 is D, where 0.5T≤D≤2T; this facilitates the machining of the holes in the boss 2 and the explosion-proof valve 8.

[0053] The advantages of the above optional embodiments are as follows: the setting of the explosion-proof valve 8 can effectively increase the safety performance of the battery, and the setting of the two protrusions 2 can protect the explosion-proof valve 8, so as to prevent the explosion-proof valve 8 from being directly damaged by the impact when the top of the housing 1 is subjected to external force, thereby reducing the safety risk caused by the failure of the explosion-proof valve 8.

[0054] Optional, such as Figures 1 to 4 As shown, the total width of all the heat dissipation fins 3 is 8% to 40% of the total length of all the bosses 2 in the left and right directions.

[0055] In the above optional embodiments, it should be noted that the number of heat dissipation fins 3 is n, and the number of protrusions 2 is m, that is, 8%≤2na / mL≤40%.

[0056] The advantages of the above optional embodiments are: by setting the total length of the heat dissipation fins 3, the rationality of the arrangement is ensured and the heat dissipation performance of the shell 1 is effectively increased.

[0057] In addition, the total width of the heat dissipation rib 3 is set to be 8%-40% of the total length of the boss 2, which can increase the heat dissipation area and improve the heat dissipation efficiency of the shell 1, without taking up too much space due to the excessive width of the heat dissipation rib 3, thus ensuring the support effect of the boss 2, achieving both effective heat dissipation and effective protection.

[0058] This ratio range avoids the problem of insufficient heat dissipation due to excessively narrow heat dissipation fins, or redundant structure and wasted space at the top of the casing due to excessively wide fins. At the same time, it adapts to the layout of bosses, poles, and insulating fins, optimizes the overall space utilization, and ensures that each component does not interfere with each other and functions normally.

[0059] Optional, such as Figures 1 to 4 As shown, it also includes two reinforcing ribs 4. Both reinforcing ribs 4 are installed on the top of the housing 1. The two reinforcing ribs 4 are located at both ends in the front and rear directions of the explosion-proof valve 8, and the two reinforcing ribs 4 are located between the two bosses 2.

[0060] In the above optional embodiments, it should be noted that the height of the reinforcing rib 4 is H, 1.5mm≤H≤5.0mm; the width of the reinforcing rib 4 is A, 2.0mm≤A≤4.5mm; in order to ensure the strength and reliability of the explosion-proof valve 8; the height of the reinforcing rib 4 is less than the height of the boss 2.

[0061] The advantages of the above optional embodiments are: by setting the reinforcing rib 4, the strength of the explosion-proof valve 8 can be effectively increased, preventing the explosion-proof valve 8 from cracking when the battery casing is subjected to external impacts such as vibration.

[0062] Optional, such as Figures 1 to 4As shown, it also includes plastic 6 and pole piece 7. There are two plastic 6, and both plastic 6 are disposed on the upper surface of the housing 1. There are two pole pieces 7, and each pole piece 7 is connected to the housing 1 through a plastic 6. The two protrusions 2 are located between the two pole pieces 7.

[0063] In the above optional embodiments, it should be noted that the combined height of the pole post 7 and the plastic 6 is less than the height of the boss 2.

[0064] The advantages of the above optional embodiments are as follows: the plastic 6 forms a sealed isolation between the terminal 7 and the housing 1, preventing leakage of electrolyte inside the battery, while blocking the current conduction between the terminal 7 and the housing 1, preventing the risk of leakage, and ensuring the stability of the battery.

[0065] Optional, such as Figures 1 to 4 As shown, it also includes an insulating rib 5, with an insulating rib 5 provided between each boss 2 and the corresponding pole post 7.

[0066] In the above optional embodiments, it should be noted that the height of the insulating rib 5 is less than the height of the boss 2.

[0067] The advantages of the above optional embodiments are as follows: by setting the insulating rib 5, the current conduction path between the boss 2 and the terminal 7 can be blocked, avoiding leakage caused by accidental contact between the boss 2 and the terminal 7, increasing the insulation performance of the battery, and ensuring the safety performance of the charging and discharging process.

[0068] Examples and comparisons of the effect of external surface temperature rise during battery cycling are as follows: The total area of ​​the upper surface of all the bosses 2 is S, the area of ​​the upper surface of the shell 1 is S1, and the area of ​​the upper surface of all the heat dissipation ribs 3 is S0; the width of the heat dissipation ribs 3 is a, the thickness of the heat dissipation ribs 3 is h, the number of heat dissipation ribs 3 is n, and the number of bosses 2 is m.

[0069] Example 1: S / S1=30%; h=0.8mm, a=0.8mm, 2na / mL=10.0%, S0 / S=5.0%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 59.8℃.

[0070] Example 2, S / S1=40%; h=0.8mm, a=0.8mm, 2na / mL=10.0%, S0 / S=5.0%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 58.8℃.

[0071] Example 3, S / S1=50%; h=0.8mm, a=0.8mm, 2na / mL=10.0%, S0 / S=5.0%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 57.8℃.

[0072] Example 4, S / S1=40%; h=1.5mm, a=0.8mm, 2na / mL=10.0%, S0 / S=5.0%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 58.5℃.

[0073] Example 5, S / S1=40%; h=2.0mm, a=0.8mm, 2na / mL=10.0%, S0 / S=5.0%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 58.1℃.

[0074] Example 6: S / S1=40%; h=1.5mm, a=1.0mm, 2na / mL=15.5%, S0 / S=10.3%; at this time, the maximum temperature rise of the outer surface during the cell cycling process is 57.5℃.

[0075] Example 7: S / S1=40%; h=1.5mm, a=1.2mm, 2na / mL=18%, S0 / S=15.0%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 55.8℃.

[0076] Example 8: S / S1=40%; h=2.0mm, a=1.2mm, 2na / mL=18%, S0 / S=15.0%; at this time, the maximum temperature rise of the outer surface during the cell cycling process is 55.3℃.

[0077] Example 9, S / S1=40%; h=3.0mm, a=1.5mm, 2na / mL=20%, S0 / S=18.0%; at this time, the maximum temperature rise of the outer surface during the cell cycling process is 53.1℃.

[0078] Example 10: S / S1=40%; h=3.5mm, a=1.8mm, 2na / mL=25%, S0 / S=20.2%; at this time, the maximum temperature rise of the outer surface during the cell cycling process is 52.6℃.

[0079] Example 11, S / S1=40%; h=4.0mm, a=2.0mm, 2na / mL=30%, S0 / S=21.5%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 51.8℃.

[0080] Example 12, S / S1=40%; h=4.5mm, a=2.2mm, 2na / mL=35%, S0 / S=22.6%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 50.8℃.

[0081] Example 13, S / S1=40%; h=5.0mm, a=2.5mm, 2na / mL=40%, S0 / S=25.0%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 49.1℃.

[0082] Comparative Example 1: S / S1=40%; h=0.6mm, a=1mm, 2na / mL=10.0%, S0 / S=8.0%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 62℃.

[0083] Comparative Example 2: S / S1=40%; h=0.2mm, a=1.5mm, 2na / mL=6.0%, S0 / S=8.0%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 65.9℃.

[0084] Comparative Example 3: S / S1=40%; h=3.0mm, a=1mm, 2na / mL=10.0%, S0 / S=7.6%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 72.2℃.

[0085] Comparative Example 4: S / S1=20%; h=0.8mm, a=1mm, 2na / mL=10.0%, S0 / S=8.0%; at this time, the maximum temperature rise of the outer surface during the cell cycle is 66.7℃.

[0086] From the above embodiments and comparative examples, it can be seen that when 25%≤S / S1≤50%, that is, the total surface area of ​​all the bosses 2 is between 25% and 50% of the surface area of ​​the upper surface of the shell 1; 0.5T≤h≤2.0T, 0.75mm≤h≤5mm, that is, the thickness of the heat dissipation ribs 3 is between 0.75mm and 5mm; 8%≤2na / mL≤40%, that is, the total width of all the heat dissipation ribs 3 is between 8% and 40% of the total length of all the bosses 2 in the left and right directions; 5%≤S0 / S≤45%, that is, the total surface area of ​​all the heat dissipation ribs 3 is within the range of 5% to 45% of the total surface area of ​​all the bosses 2: With the values ​​of 2na / mL, h, and S0 / S fixed, and the value of S / S1 gradually increasing, the maximum temperature rise of the outer surface of the cell during cycling generally showed a decreasing trend, and all were less than 60℃. With the values ​​of S / S1, 2na / mL and S0 / S fixed, as the value of h gradually increases, the maximum temperature rise of the outer surface of the cell during cycling generally shows a decreasing trend, and all are less than 60℃. When the values ​​of S / S1 and h are fixed, and the values ​​of 2na / mL and S0 / S gradually increase, the maximum temperature rise of the outer surface of the cell during cycling generally shows a decreasing trend, and all are less than 60℃.

[0087] When the value of h exceeds the set range, that is, when the thickness h of the heat dissipation fin 3 is not between 0.75mm and 5mm, or when the value of S / S1 is less than the set range, or when 2na / mL or S0 / S is less than the set range, the maximum temperature rise of the outer surface of the battery cell during circulation exceeds 60℃.

[0088] Furthermore, by setting 25%≤S / S1≤50%, meaning the total upper surface area of ​​all protrusions 2 is between 25% and 50% of the surface area of ​​the upper surface of the casing 1; 0.5T≤h≤2.0T, 0.75mm≤h≤5mm, meaning the thickness of the heat dissipation ribs 3 is between 0.75mm and 5mm; 8%≤2na / mL≤40%, meaning the total width of all heat dissipation ribs 3 is between 8% and 40% of the total length of all protrusions 2 in the left and right directions; and 5%≤S0 / S≤45%, meaning the total upper surface area of ​​all heat dissipation ribs 3 is between 5% and 45% of the total upper surface area of ​​all protrusions 2, the heat dissipation effect of the battery casing can be effectively guaranteed, ensuring that the maximum temperature rise of the outer surface of the cell during cycling is within 60℃, effectively improving the fast charging performance of the battery.

[0089] According to an embodiment of the second aspect of the present invention, a battery is provided, comprising all the technical features of the embodiment of the first aspect of the present invention.

[0090] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A battery casing, characterized in that, include: Shell (1); A boss (2), at least one boss (2), each boss (2) is disposed on the upper surface of the housing (1), and the sum of the upper surface areas of all the bosses (2) is between 25% and 50% of the surface area of ​​the upper surface of the housing (1). Heat dissipation ribs (3), there are multiple heat dissipation ribs (3), and multiple heat dissipation ribs (3) are provided on each of the bosses (2); the total surface area of ​​all the heat dissipation ribs (3) is between 5% and 45% of the total surface area of ​​all the bosses (2).

2. The battery casing according to claim 1, characterized in that, Each of the aforementioned heat dissipation fins (3) is formed by connecting straight line segments with semicircles at both ends and parallel lines in the middle; The plurality of heat dissipation fins on each of the bosses (2) are arranged concentrically.

3. The battery casing according to claim 1, characterized in that, The top wall thickness of each of the aforementioned bosses (2) is T, where 1.5mm ≤ T ≤ 2.5mm; The length of each of the bosses (2) is L, 60mm≤L≤150mm; The width of each of the bosses (2) is W, 22mm≤W≤55mm.

4. The battery casing according to claim 1, characterized in that, The thickness of each of the heat dissipation fins (3) is h, where 0.5T≤h≤2.0T; The width of each heat dissipation fin (3) is a, 0.6mm≤a≤2.5mm.

5. The battery casing according to claim 1, characterized in that, Also includes: An explosion-proof valve (2) is installed on the top of the housing (1). There are two bosses (2), which are located on both sides of the explosion-proof valve (8).

6. The battery casing according to claim 1, characterized in that, The total width of all the heat dissipation fins (3) is 8% to 40% of the total length of all the bosses (2) in the left and right directions.

7. The battery casing according to claim 5, characterized in that, Also includes: The number of the reinforcing ribs (4) is two. Both reinforcing ribs (4) are installed on the top of the housing (1). The two reinforcing ribs (4) are located at both ends of the explosion-proof valve (8) in the front-rear direction. The two reinforcing ribs (4) are located between the two bosses (2).

8. The battery casing according to claim 5, characterized in that, Also includes: Plastic (6), the number of plastic (6) is two, and both plastic (6) are disposed on the upper surface of the housing (1); The pole (7) has two poles, each pole (7) is connected to the housing (1) by a plastic (6), and the two bosses (2) are located between the two poles (7).

9. The battery casing according to claim 8, characterized in that, Also includes: An insulating rib (5) is provided between each of the bosses (2) and the corresponding pole post (7).

10. A battery, characterized in that, Includes all the technical features of the battery casing as described in any one of claims 1 to 9.

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