Battery cover plate and battery

Abstract

The application belongs to the technical field of batteries, and discloses a battery cover plate and a battery. The battery cover plate comprises a cover plate body and a conductive assembly. The cover plate body comprises a protection part and a mounting part. The mounting part is arranged on both sides of the protection part. The mounting part is a plate body structure. The protection part is a hollow boss structure formed by protruding from the inner side facing the pole group to the outer side away from the pole group. The conductive assembly comprises a pole column module corresponding to the mounting part. The pole column module is insulatedly connected to the mounting part. Part of the pole column module is located on the outer side of the cover plate body away from the pole group, and the other part is located on the inner side of the cover plate body facing the pole group. The part of the pole column module located on the outer side of the cover plate body is lower than the surface of the protection part away from the pole group. The space occupation on the outer side of the battery cover plate is reduced, the battery module assembly rate is improved, the protection part provides protection for the pole column module, increases the volume of the pole group, improves the capacity, and the formed multi-pole column structure has lower internal resistance and temperature.

Description

Technical Field

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

[0002] As a crucial component of lithium batteries, the battery cover's structural design not only affects the battery's basic performance (such as capacity and charge / discharge efficiency) but also directly relates to its safety and long-term reliability. The main components of the battery cover include conductive electrode posts, a plain aluminum plate, riveting blocks, outer insulation components, inner insulation components, sealing components, and explosion-proof valves.

[0003] Currently, traditional battery cover plates typically have a flat aluminum plate structure. One end of the conductive electrode post passes through the aluminum plate and is connected to it via a rivet block, with an external insulating component between the rivet block and the aluminum plate for insulation protection; the other end is located on the other side of the aluminum plate and is welded to the electrode lug of the electrode assembly, while an internal insulating component provides insulation protection between the conductive electrode post and the aluminum plate.

[0004] This structure leads to two problems after the traditional battery cover is assembled, because the aluminum plate is flat: First, the rivet blocks and outer insulation parts on the outside of the aluminum plate protrude from the plate surface due to the stacked installation, occupying additional external space and affecting the assembly rate of the battery module; Second, the conductive electrode posts and inner insulation parts on the other side of the aluminum plate also protrude from the plate surface, occupying internal space, resulting in low space utilization between the electrode group and the aluminum plate, limiting the volume of the electrode group, and thus reducing the battery capacity. Summary of the Invention

[0005] The purpose of this invention is to provide a battery cover and a battery that not only saves assembly space for the battery module and increases the assembly rate of the battery module, but also improves the utilization rate of internal space, increases the volume of the electrode assembly, and enhances the battery capacity.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On one hand, a battery cover is provided, the battery cover comprising:

[0008] The cover plate body includes a protective part and a mounting part. The mounting part is located on both sides of the protective part along a first direction. The mounting part is a plate structure. The protective part is a hollow boss structure formed by the cover plate body protruding from the inner side facing the pole group to the outer side away from the pole group along a second direction.

[0009] A conductive component includes pole modules that correspond one-to-one with the mounting portion. The pole modules are insulatedly connected to the mounting portion. A portion of the pole module is located on the outer side of the cover plate body away from the pole group, and another portion of the pole module is located on the inner side of the cover plate body facing the pole group. The portion of the pole module located on the outer side of the cover plate body is lower than the surface of the protective portion away from the pole group.

[0010] Optionally, the mounting part includes an intermediate plate and a connecting plate. The intermediate plate has inclined connecting plates on both sides along a third direction. The lower end of the connecting plate is connected to the intermediate plate. The pole module also includes conductive electrode posts that correspond one-to-one with the connecting plate. The conductive electrode posts are insulatedly connected to the corresponding connecting plate.

[0011] Optionally, the mounting portion further includes an extension plate, which is connected to the high end of the connecting plate away from the intermediate plate and is parallel to the intermediate plate. The electrode module further includes a flow guide top plate, which is located on the side of the mounting portion away from the electrode assembly and includes a main plate assembly. The main plate assembly includes an intermediate flow guide plate, a connecting flow guide plate, and an extended flow guide plate. The intermediate flow guide plate is parallel to the intermediate plate. The connecting flow guide plate is located on both sides of the intermediate flow guide plate along the third direction. The connecting flow guide plate is parallel to the connecting plate and is connected to the end of the conductive electrode post located outside the cover plate body. The extended flow guide plate is connected to the side of the connecting flow guide plate away from the intermediate flow guide plate and is parallel to the extension plate.

[0012] Optionally, the top guide plate further includes an extension plate assembly, which includes a middle extension plate, a connecting extension plate, and an outer extension plate. The middle extension plate is vertically connected to the side of the middle guide plate near the protective part. The connecting extension plate is disposed on both sides of the middle extension plate along the third direction and is vertically connected to the side of the connecting guide plate near the protective part. The outer extension plate is disposed on the side of the connecting extension plate away from the middle extension plate and is vertically connected to the side of the outer guide plate near the protective part.

[0013] Optionally, the conductive component further includes an insulating module, which includes an outer insulating member and an inner insulating member. The outer insulating member includes an outer insulating main body and an outer insulating extension. The outer insulating main body has the same shape as the main body plate assembly and is disposed between the main body plate assembly and the mounting part. The outer insulating extension is vertically connected to the side of the outer insulating main body near the protective part. The outer insulating extension has the same shape as the extension plate assembly and is disposed between the extension plate assembly and the protective part. The inner insulating member includes a first inner insulating part and a second inner insulating part. The first inner insulating part is disposed on both sides of the second inner insulating part along the first direction. The first inner insulating part has the same shape as the mounting part and is attached to the side of the mounting part facing the electrode assembly. The second inner insulating part has the same shape as the protective part and is inserted into the protective part.

[0014] Optionally, the electrode module further includes a busbar base plate, which is disposed on the side of the first inner insulation portion facing the electrode assembly. The busbar base plate includes an intermediate busbar body and a connecting busbar body. The intermediate busbar body is parallel to the intermediate plate body, and the connecting busbar body is disposed on both sides of the intermediate busbar body along the third direction. The connecting busbar body is parallel to the connecting plate body and is connected to the other end of the conductive electrode post located inside the cover plate body.

[0015] Optionally, the distance between the surface of the extension plate away from the extension guide plate and the surface of the protective part away from the pole group along the second direction is H, and satisfies 2mm≤H≤10mm.

[0016] Optionally, the length of the top guide plate along the third direction is L, and the length of the cover plate body along the third direction is A, satisfying 10mm≤AL≤16mm.

[0017] Optionally, the width dimension of the protective part along the first direction is W, and the width dimension of the cover plate body along the first direction is B, and satisfies 0.3≤W / B≤0.6.

[0018] On the other hand, a battery is provided, the battery including an electrode assembly, a battery housing and a battery cover as described in any of the preceding claims, the battery housing being a hollow housing structure having at least one opening, and the battery cover being disposed at the opening of the battery housing to close the battery housing and form a receiving cavity for accommodating the electrode assembly.

[0019] The beneficial effects of this invention are:

[0020] This invention provides a battery cover plate, which comprises a cover plate body consisting of a protective part and a mounting part. A terminal module is insulated and connected to the mounting part, such that the portion of the terminal module on the cover plate body facing away from the terminal assembly is lower than the surface of the protective part facing away from the terminal assembly. This effectively utilizes the space previously occupied by the terminal module protruding from the cover plate body, reducing the space occupied on the outer side of the battery cover plate and increasing the battery module assembly rate. Furthermore, since the protective part is a hollow boss structure formed by the cover plate body protruding from the inner side facing the terminal assembly towards the outer side facing away from the terminal assembly along a second direction, it provides protection for the terminal module, preventing damage from impacts. Simultaneously, by utilizing the internal space of the protective part, the space utilization rate between the terminal assembly and the cover plate body is improved, increasing the terminal assembly volume and improving battery capacity. In addition, since the terminal modules correspond one-to-one with the mounting parts, and terminal modules are provided on both sides of the protective part along the first direction, a multi-terminal structure is formed, resulting in lower internal resistance and lower temperature while ensuring overcurrent capacity.

[0021] The present invention also provides a battery that, by applying the aforementioned battery cover, not only reduces the external space occupied but also expands the internal space, thereby increasing the volume of the electrode assembly and enhancing the power supply capacity. Attached Figure Description

[0022] Figure 1 This is a structural assembly diagram of the battery cover plate provided by the present invention from a first-view perspective;

[0023] Figure 2 This is a structural assembly diagram of the battery cover plate provided by the present invention from a second perspective.

[0024] Figure 3 This is a structural exploded view of the battery cover plate provided by the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the cover body in the battery cover provided by the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the flow guiding top plate in the battery cover provided by the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the external insulating component in the battery cover provided by the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the inner insulating component in the battery cover provided by the present invention;

[0029] Figure 8 This is a schematic diagram of the busbar base plate in the battery cover provided by the present invention;

[0030] Figure 9This is a top view of the battery cover provided by the present invention;

[0031] Figure 10 yes Figure 9 A cross-sectional view along the I-I direction.

[0032] In the picture:

[0033] 1. Cover plate body; 11. Protective part; 12. Mounting part; 121. Intermediate plate; 122. Connecting plate; 123. Extension plate;

[0034] 2. Terminal post module; 21. Conductive electrode post; 22. Top guide plate; 221. Main plate assembly; 2211. Intermediate guide plate; 2212. Connecting guide plate; 2213. Extended guide plate; 222. Expansion plate assembly; 2221. Intermediate expansion plate; 2222. Connecting expansion plate; 2223. Extended expansion plate; 23. Busbar base plate; 231. Intermediate busbar body; 232. Connecting busbar body;

[0035] 3. Insulation module; 31. Outer insulation component; 311. Outer insulation main body; 3111. First outer insulator; 3112. Second outer insulator; 3113. Third outer insulator; 312. Outer insulation extension part; 3121. Fourth outer insulator; 3122. Fifth outer insulator; 3123. Sixth outer insulator; 32. Inner insulation component; 321. First inner insulation part; 3211. Intermediate inner insulator; 3212. Connecting inner insulator; 3213. Extended inner insulator; 322. Second inner insulation part. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0040] Because traditional battery covers have flat aluminum plates, the rivet blocks and outer insulation components on the outside of the aluminum plate protrude from the plate surface due to stacking, resulting in additional external space occupation and affecting the battery module assembly rate. On the other hand, the conductive electrode posts and inner insulation components on the other side of the aluminum plate also protrude from the plate surface, occupying internal space. This leads to low space utilization between the electrode assembly and the aluminum plate, limiting the electrode assembly volume and thus reducing battery capacity.

[0041] Therefore, in order to reduce the space occupied by the battery cover in the external and internal spaces, improve the battery module assembly rate, and increase battery capacity, this embodiment provides a battery cover. For ease of description, the width direction of the battery cover is defined as the first direction, the height direction of the battery cover is defined as the second direction, and the length direction of the battery cover is defined as the third direction.

[0042] like Figures 1 to 10 As shown, the battery cover includes a cover body 1 and a conductive component. The cover body 1 includes a protective part 11 and a mounting part 12. The mounting part 12 is located on both sides of the protective part 11 along a first direction. The mounting part 12 is a plate structure. The protective part 11 is a hollow boss structure formed by the cover body 1 protruding from the inside facing the electrode group to the outside away from the electrode group along a second direction. The conductive component includes terminal modules 2 that correspond one-to-one with the mounting part 12. The terminal modules 2 are insulatedly connected to the mounting part 12. A part of the terminal modules 2 is located on the outside of the cover body 1 away from the electrode group, and another part of the terminal modules 2 is located on the inside of the cover body 1 facing the electrode group. The part of the terminal modules 2 located on the outside of the cover body 1 is lower than the surface of the protective part 11 away from the electrode group.

[0043] The battery cover is provided with a cover body 1 consisting of a protective part 11 and a mounting part 12, and the terminal module 2 is insulatedly connected to the mounting part 12. The portion of the terminal module 2 located on the cover body 1 away from the terminal group is lower than the surface of the protective part 11 away from the terminal group. This effectively utilizes the space originally occupied by the terminal module 2 protruding from the cover body 1, reduces the space occupied on the outer side of the battery cover, and improves the battery module assembly rate. Furthermore, since the protective part 11 protrudes from the cover body 1 from the inside towards the terminal group to the outside away from the terminal group along a second direction, the battery cover is equipped with a cover body 1. The hollow boss structure formed by the structure provides protection for the terminal module 2, preventing damage from impacts. On the other hand, it allows the terminal group to utilize the internal space of the protective part 11, improving the space utilization between the terminal group and the cover body 1, increasing the volume of the terminal group and improving the battery capacity. In addition, since the terminal module 2 corresponds one-to-one with the mounting part 12, and the protective part 11 is provided with terminal modules 2 on both sides along the first direction, a multi-terminal structure is formed, which results in lower internal resistance and lower temperature while ensuring overcurrent capacity.

[0044] Optionally, such as Figure 3 , Figure 4 As shown, the mounting part 12 includes an intermediate plate 121 and a connecting plate 122. The intermediate plate 121 has inclined connecting plates 122 on both sides along a third direction. The lower end of the connecting plate 122 is connected to the intermediate plate 121. The electrode module 2 also includes conductive electrode posts 21 that correspond one-to-one with the connecting plate 122. The conductive electrode posts 21 are insulatedly connected to the corresponding connecting plate 122.

[0045] Since the protective part 11 is a raised hollow boss structure, the existence of this structure will cause the distance between the conductive electrode post 21 connected to the mounting part 12 and the surface of the protective part 11 away from the electrode group to be too far, which makes it inconvenient to weld the conductive electrode post 21 to the electrode plate. Therefore, by insulating the conductive electrode post 21 to the inclined connecting plate 122, it helps to reduce the distance between the conductive electrode post 21 and the surface of the protective part 11 away from the electrode group, thereby facilitating the welding of the conductive electrode post 21 to the electrode plate. Furthermore, by making the number of conductive electrode posts 21 in the electrode post module 2 the same as the number of connecting plates 122, compared with a single conductive electrode post 21 with the same flow volume, not only is the internal resistance lower, but the temperature rise of the conductive electrode post 21 can also be effectively reduced.

[0046] Optionally, such as Figure 4 , Figure 5As shown, the mounting part 12 also includes an extension plate 123, which is connected to the high end of the connecting plate 122 away from the intermediate plate 121 and is parallel to the intermediate plate 121. The pole post module 2 also includes a flow guide top plate 22, which is located on the side of the mounting part 12 away from the pole group and includes a main plate group 221. The main plate group 221 includes an intermediate flow guide plate 2211, a connecting flow guide plate 2212 and an extended flow guide plate 2213. The intermediate flow guide plate 2211 is parallel to the intermediate plate 121. The connecting flow guide plate 2212 is located on both sides of the intermediate flow guide plate 2211 along a third direction. The connecting flow guide plate 2212 is parallel to the connecting plate 122 and is connected to the end of the conductive pole 21 located outside the cover plate body 1. The extended flow guide plate 2213 is connected to the side of the connecting flow guide plate 2212 away from the intermediate flow guide plate 2211 and is parallel to the extension plate 123.

[0047] Since the mounting part 12 is provided with an extension plate 123 and the connecting plate 122 of the mounting part 12 is inclined, the area of ​​the main plate assembly 221 on the mounting part 12 for setting the flow guide top plate 22 can be increased, thereby increasing the area of ​​the main plate assembly 221 and improving the flow capacity of the flow guide top plate 22.

[0048] Optionally, such as Figure 5 As shown, the top guide plate 22 also includes an extension plate assembly 222. The extension plate assembly 222 includes a middle extension plate 2221, a connecting extension plate 2222, and an outer extension plate 2223. The middle extension plate 2221 is vertically connected to the side of the middle guide plate 2211 near the protective part 11. The connecting extension plate 2222 is located on both sides of the middle extension plate 2221 along a third direction and is vertically connected to the side of the connecting guide plate 2212 near the protective part 11. The outer extension plate 2223 is located on the side of the connecting extension plate 2222 away from the middle extension plate 2221 and is vertically connected to the side of the outer extension plate 2213 near the protective part 11.

[0049] By providing an expansion plate group 222 consisting of an intermediate expansion plate 2221, a connecting expansion plate 2222, and an outer extension expansion plate 2223 on the top guide plate 22, the area of ​​the top guide plate 22 for welding with the battery plate is further increased, and the flow capacity of the top guide plate 22 is further improved. Furthermore, since each part of the expansion plate group 222 is perpendicularly connected to each part of the main plate group 221 and has spatial overlap with the protective part 11, the top guide plate 22 does not increase the external dimensions of the battery cover when increasing the flow guiding area.

[0050] Optionally, such as Figures 4 to 7As shown, the conductive component also includes an insulating module 3. The insulating module 3 includes an outer insulating member 31 and an inner insulating member 32. The outer insulating member 31 includes an outer insulating main body 311 and an outer insulating extension 312. The outer insulating main body 311 has the same shape as the main body plate assembly 221 and is disposed between the main body plate assembly 221 and the mounting part 12. The outer insulating extension 312 is vertically connected to the side of the outer insulating main body 311 near the protective part 11. The outer insulating extension 312 has the same shape as the extension plate assembly 222 and is disposed between the extension plate assembly 222 and the protective part 11. The inner insulating member 32 includes a first inner insulating part 321 and a second inner insulating part 322. The first inner insulating part 321 is disposed on both sides of the second inner insulating part 322 along the first direction. The first inner insulating part 321 has the same shape as the mounting part 12 and is attached to the side of the mounting part 12 facing the electrode assembly. The second inner insulating part 322 has the same shape as the protective part 11 and is inserted into the protective part 11.

[0051] By designing an outer insulating member 31 consisting of an outer insulating main body 311 and an outer insulating extension 312, and making the outer insulating main body 311 identical in shape to the main body plate assembly 221, and the outer insulating extension 312 identical in shape to the extension plate assembly 222, insulation protection is ensured for the outer side of the cover plate body 1, preventing short circuits caused by direct contact between the various parts of the flow guide plate 22 and the cover plate body 1. Similarly, by designing an inner insulating member 32 consisting of a first inner insulating part 321 and a second inner insulating part 322, and making the first inner insulating part 321 identical in shape to the mounting part 12, and the second inner insulating part 322 identical in shape to the protective part 11, and inserting the second inner insulating part 322 into the protective part 11, insulation protection is ensured for the inner side of the cover plate body 1, preventing short circuits caused by exposed areas on the inner side of the cover plate body 1.

[0052] In this embodiment, as Figure 6 As shown, the outer insulation main body 311 includes a first outer insulator 3111, a second outer insulator 3112, and a third outer insulator 3113. The first outer insulator 3111 is sandwiched between the intermediate guide plate 2211 and the intermediate plate 121. The second outer insulator 3112 is sandwiched between the connecting plate 122 and the connecting guide plate 2212. The third outer insulator 3113 is sandwiched between the extension plate 123 and the extended guide plate 2213. The outer insulation extension part 312 includes a fourth outer insulator 3121, a fifth outer insulator 3122, and a sixth outer insulator 3123. The fourth outer insulator 3121 is sandwiched between the intermediate extension plate 2221 and the protective part 11. The fifth outer insulator 3122 is sandwiched between the connecting extension plate 2222 and the protective part 11. The sixth outer insulator 3123 is sandwiched between the extended extension plate 2223 and the protective part 11.

[0053] In this embodiment, as Figure 7As shown, both the first inner insulation part 321 and the mounting part 12 are plate structures, and are respectively provided with an intermediate inner insulator 3211, a connecting inner insulator 3212 and an extended inner insulator 3213. The intermediate inner insulator 3211 has inclined connecting inner insulators 3212 on both sides along the third direction. The lower end of the connecting inner insulator 3212 is connected to the intermediate inner insulator 3211, and the extended inner insulator 3213 is connected to the side of the connecting inner insulator 3212 away from the intermediate inner insulator 3211. The second inner insulation part 322 and the protective part 11 are both hollow boss structures.

[0054] Optionally, such as Figure 8 As shown, the electrode module 2 also includes a busbar base plate 23. The busbar base plate 23 is located on the side of the first inner insulation part 321 facing the electrode group. The busbar base plate 23 includes an intermediate busbar body 231 and a connecting busbar body 232. The intermediate busbar body 231 is parallel to the intermediate plate 121. The connecting busbar body 232 is located on both sides of the intermediate busbar body 231 along a third direction. The connecting busbar body 232 is parallel to the connecting plate 122 and is connected to the other end of the conductive electrode post 21 located inside the cover plate body 1.

[0055] By designing a busbar base plate 23 consisting of an intermediate busbar body 231 and a connecting busbar body 232, the two conductive electrode posts 21 of the electrode module 2 are connected into one unit using the busbar base plate 23, thereby increasing the current flow area with the electrode tab and improving the current flow capacity.

[0056] Optionally, such as Figure 9 , Figure 10 As shown, the distance between the surface of the extension plate 2223 away from the extension guide plate 2213 and the surface of the protective part 11 away from the electrode group along the second direction is H, and satisfies 2mm≤H≤10mm.

[0057] Since the extended guide plate 2213 is connected to the high end of the inclined connecting guide plate 2212, the extended expansion plate 2223, which is perpendicularly connected to the extended guide plate 2213, is located at the highest point of the guide plate 22. Therefore, by limiting the distance H between the surface of the extended expansion plate 2223 facing away from the extended guide plate 2213 and the surface of the protective part 11 facing away from the electrode group along the second direction, it is made to satisfy 2mm≤H≤10mm. This avoids the extended expansion plate 2223 from being too close to the top of the protective part 11, which could easily cause collisions, and also avoids the extended expansion plate 2223 from being too far from the top of the protective part 11, which would result in a smaller height of the extended expansion plate 2223, thereby reducing the area of ​​the extended expansion plate 2223 used to increase the welding area between the guide plate 22 and the electrode plate, resulting in insufficient current flow capacity.

[0058] The distance H between the surface of the extension plate 2223 away from the extension guide plate 2213 and the surface of the protective part 11 away from the electrode group along the second direction can be any value between 2mm and 10mm or any range between two values, such as 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc.

[0059] Optionally, such as Figure 9 , Figure 10 As shown, the length of the top guide plate 22 along the third direction is L, and the length of the cover plate body 1 along the third direction is A, and both satisfy 10mm≤AL≤16mm.

[0060] By limiting the difference between the length dimension A of the cover plate body 1 along the third direction and the length dimension L of the guide plate 22 along the third direction, such that it satisfies 10mm≤AL≤16mm, we can avoid the following: on the one hand, the difference is too small, which would cause the guide plate 22 to be too close to the edge of the cover plate body 1 along the third direction, making it easy to bump into it; on the other hand, the difference is too large, which would cause the length of the guide plate 22 along the third direction to be insufficient, reducing the welding area of ​​the guide plate 22 to the plate and resulting in insufficient flow capacity.

[0061] The difference between the length A of the cover plate body 1 along the third direction and the length L of the guide plate 22 along the third direction can be any value between 10mm and 16mm or any range between two values, such as 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, etc.

[0062] Optionally, such as Figure 9 , Figure 10 As shown, the width dimension of the protective part 11 along the first direction is W, and the width dimension of the cover body 1 along the first direction is B, and satisfies 0.3≤W / B≤0.6.

[0063] By limiting the ratio of the width dimension W of the protective part 11 along the first direction to the width dimension B of the cover plate body along the first direction, such that it satisfies 0.3≤W / B≤0.6, on the one hand, the ratio is avoided from being too small, which would result in insufficient space for the expansion of the electrode group in the protective part 11 and fail to meet the power supply requirements of the battery; on the other hand, the ratio is avoided from being too large, which would result in the compression of the size of the mounting part 12, which would result in insufficient area for the mounting part 12 to set the electrode module 2, compressing the size of the electrode module 2 and failing to meet the overcurrent requirements of the battery.

[0064] The ratio of the width dimension W of the protective part 11 along the first direction to the width dimension B of the cover plate body along the first direction can be any value between 0.3 and 0.6 or any range between two values, such as 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, etc.

[0065] In this embodiment, in order to verify the effect of the above parameter limitations on the battery cover provided in this embodiment, as shown in Table 1, six sets of embodiments and six sets of comparative examples are provided for verification.

[0066] Table 1

[0067]

[0068] A comparison of Examples 1 to 6 with Comparative Examples 1 to 2 reveals that when the distance H between the surface of the extended plate 2223 away from the extended guide plate 2213 and the surface of the protective part 11 away from the electrode group along the second direction is less than the minimum value of the range 2mm≤H≤10mm, the extended plate 2223 is too close to the top of the protective part 11, making it prone to collision. When the distance H between the surface of the extended plate 2223 away from the extended guide plate 2213 and the surface of the protective part 11 away from the electrode group along the second direction is greater than the maximum value of the range 2mm≤H≤10mm, the extended plate 2223 is too far from the top of the protective part 11, resulting in a smaller height dimension of the extended plate 2223. This reduces the area of ​​the extended plate 2223 used to increase the welding area between the top guide plate 22 and the electrode plate, leading to insufficient current carrying capacity.

[0069] A comparison of Examples 1 to 6 with Comparative Examples 3 to 4 reveals that when the difference between the length A of the cover plate body 1 along the third direction and the length L of the guide plate 22 along the third direction is less than the minimum value of the range 10mm≤AL≤16mm, the difference is too small, causing the guide plate 22 to be too close to the edge of the cover plate body 1 along the third direction, making it prone to collision. When the difference between the length A of the cover plate body 1 along the third direction and the length L of the guide plate 22 along the third direction is greater than the maximum value of the range 10mm≤AL≤16mm, the difference is too large, resulting in insufficient length of the guide plate 22 along the third direction, reducing the welding area of ​​the guide plate 22 with the plate, and resulting in insufficient flow capacity.

[0070] A comparison of Examples 1 to 6 with Comparative Examples 5 to 6 reveals that when the ratio of the width dimension W of the protective part 11 along the first direction to the width dimension B of the cover plate body along the first direction is less than the minimum value in the range 0.3≤W / B≤0.6, the ratio is too small, resulting in insufficient space for the protective part 11 to expand the electrode assembly, thus failing to meet the battery's power supply requirements. Conversely, when the ratio of the width dimension W of the protective part 11 along the first direction to the width dimension B of the cover plate body along the first direction is greater than the maximum value in the range 0.3≤W / B≤0.6, the ratio is too large, leading to a compression of the size of the mounting part 12. This results in insufficient area for the mounting part 12 to set the electrode module 2, further compressing the size of the electrode module 2 and failing to meet the battery's overcurrent requirements.

[0071] In this embodiment, a battery is also provided, comprising an electrode assembly, a battery casing, and the aforementioned battery cover. The battery casing is a hollow casing structure with at least one opening. The battery cover is disposed at the opening of the battery casing, closing the battery casing to form a cavity for accommodating the electrode assembly. By using the aforementioned battery cover, this battery not only reduces the external space occupied but also expands the internal space, increasing the volume of the electrode assembly and thus enhancing the power supply capacity.

[0072] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A battery cover, characterized in that, The battery cover includes: The cover plate body includes a protective part and a mounting part. The mounting part is located on both sides of the protective part along a first direction. The mounting part is a plate structure. The protective part is a hollow boss structure formed by the cover plate body protruding from the inner side facing the pole group to the outer side away from the pole group along a second direction. A conductive component includes pole modules that correspond one-to-one with the mounting portion. The pole modules are insulatedly connected to the mounting portion. A portion of the pole module is located on the outer side of the cover plate body away from the pole group, and another portion of the pole module is located on the inner side of the cover plate body facing the pole group. The portion of the pole module located on the outer side of the cover plate body is lower than the surface of the protective portion away from the pole group. The mounting part includes an intermediate plate and a connecting plate. The intermediate plate has inclined connecting plates on both sides along a third direction. The lower end of the connecting plate is connected to the intermediate plate. The pole module also includes conductive electrode posts that correspond one-to-one with the connecting plate. The conductive electrode posts are insulatedly connected to the corresponding connecting plate. The mounting portion further includes an extension plate, which is connected to the high end of the connecting plate away from the intermediate plate and is parallel to the intermediate plate. The electrode module further includes a flow guide top plate, which is located on the side of the mounting portion away from the electrode assembly and includes a main plate assembly. The main plate assembly includes a middle flow guide plate, a connecting flow guide plate, and an extended flow guide plate. The middle flow guide plate is parallel to the intermediate plate. The connecting flow guide plate is located on both sides of the middle flow guide plate along the third direction. The connecting flow guide plate is parallel to the connecting plate and is connected to the end of the conductive electrode post located outside the cover plate body. The extended flow guide plate is connected to the side of the connecting flow guide plate away from the middle flow guide plate and is parallel to the extension plate. The length of the top guide plate along the third direction is L, and the length of the cover plate body along the third direction is A, and both satisfy 10mm≤AL≤16mm; The width dimension of the protective part along the first direction is W, and the width dimension of the cover plate body along the first direction is B, and the condition 0.3≤W / B≤0.6 is satisfied. The width direction of the battery cover is the first direction, the height direction of the battery cover is the second direction, and the length direction of the battery cover is the third direction.

2. The battery cover according to claim 1, characterized in that, The top guide plate also includes an extension plate assembly, which includes a middle extension plate, a connecting extension plate, and an outer extension plate. The middle extension plate is vertically connected to the side of the middle guide plate near the protective part. The connecting extension plate is located on both sides of the middle extension plate along the third direction and is vertically connected to the side of the connecting guide plate near the protective part. The outer extension plate is located on the side of the connecting extension plate away from the middle extension plate and is vertically connected to the side of the outer guide plate near the protective part.

3. The battery cover according to claim 2, characterized in that, The conductive component further includes an insulating module, which includes an outer insulating component and an inner insulating component. The outer insulating component includes an outer insulating main body and an outer insulating extension. The outer insulating main body has the same shape as the main body plate assembly and is disposed between the main body plate assembly and the mounting part. The outer insulating extension is vertically connected to the side of the outer insulating main body near the protective part. The outer insulating extension has the same shape as the extension plate assembly and is disposed between the extension plate assembly and the protective part. The inner insulating component includes a first inner insulating part and a second inner insulating part. The first inner insulating part is disposed on both sides of the second inner insulating part along the first direction. The first inner insulating part has the same shape as the mounting part and is attached to the side of the mounting part facing the electrode assembly. The second inner insulating part has the same shape as the protective part and is inserted into the protective part.

4. The battery cover according to claim 3, characterized in that, The electrode module further includes a busbar base plate, which is located on the side of the first inner insulation portion facing the electrode assembly. The busbar base plate includes an intermediate busbar body and a connecting busbar body. The intermediate busbar body is parallel to the intermediate plate body, and the connecting busbar body is located on both sides of the intermediate busbar body along the third direction. The connecting busbar body is parallel to the connecting plate body and is connected to the other end of the conductive electrode post located inside the cover plate body.

5. The battery cover according to claim 2, characterized in that, The distance between the surface of the extension plate away from the extension guide plate and the surface of the protective part away from the pole group along the second direction is H, and satisfies 2mm≤H≤10mm.

6. A battery, characterized in that, The battery includes an electrode assembly, a battery casing, and a battery cover as described in any one of claims 1-5. The battery casing is a hollow casing structure with at least one opening. The battery cover is disposed at the opening of the battery casing to close the battery casing and form a receiving cavity for accommodating the electrode assembly.

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