Battery cover plate and battery

Abstract

The invention belongs to the technical field of batteries, and discloses a battery cover plate and a battery, the battery cover plate comprises a first insulating part and a conductive pole, the first insulating part is provided with a plugging through hole, the conductive pole comprises a pole main body and a pole bottom plate, the pole bottom plate comprises a first connecting plate and a second connecting plate, the pole main body is connected to the first connecting plate, and the second connecting plate is connected to the second connecting plate. The side, deviating from the pole main body, of the second connecting plate is welded with the pole lug, the second connecting plate is provided with a welding position separated from the first insulating part and a fixing position abutting against the first insulating part, and the second connecting plate is hinged to the first connecting plate and is used for realizing conversion between the fixing position and the welding position. Therefore, when welding operation is carried out, the second connecting plate can be rotated to the welding position from the fixing position, separation of the second connecting plate and the first insulating part is achieved, the heat influence of high temperature on the first insulating part during welding operation is reduced, deformation of the first insulating part due to the high temperature is avoided, and the insulating performance and the assembly manufacturability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of inventions, and in particular to a battery cover and a battery. Background Art

[0002] As an important part of lithium batteries, the structural design of the battery cover not only affects the basic performance of the battery, such as capacity and charge and discharge efficiency, but is also directly related to the safety and long-term reliability of the battery. The main structural components of the battery cover include conductive electrode columns, aluminum plates, plastic parts and explosion-proof valves.

[0003] In order to avoid short circuit caused by direct contact between the conductive electrode column and the bare aluminum plate, a plastic part for insulation is usually provided between the conductive electrode column and the bare aluminum plate. However, when the conductive electrode column and the pole ear are connected by laser welding, the heat generated during the welding process will cause the temperature of the conductive electrode column to rise rapidly, resulting in the temperature of the conductive electrode column being too high. A large amount of heat is transferred to the plastic part between the conductive electrode column and the bare aluminum plate, causing the plastic part to deform due to heat and extend in the horizontal direction. This will not only increase the probability of the plastic part being broken down due to the reduction in thickness, resulting in a high short circuit risk and poor insulation protection, but also change the outer dimensions of the battery cover due to the deformation of the plastic part, making it difficult to assemble the battery cover into the battery shell and the assembly process is poor. Summary of the invention

[0004] The object of the present invention is to provide a battery cover plate and a battery with strong insulation protection and good assembly processability.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In one aspect, a battery cover is provided, the battery cover comprising:

[0007] A first insulating member, wherein the first insulating member is provided with an inserting through hole;

[0008] A conductive electrode, the conductive electrode comprising a pole body and a pole bottom plate, the pole body being inserted into the plug-in through hole, the pole bottom plate comprising a first connecting plate and a second connecting plate, the pole body being connected to the first connecting plate, the second connecting plate being welded to the pole ear on a side away from the pole body, the second connecting plate having a welding position separated from the first insulating member and a fixing position abutting against the first insulating member, the second connecting plate being hinged to the first connecting plate to realize the conversion between the fixing position and the welding position.

[0009] Optionally, a plugging groove is formed on one side of the first connecting plate facing the second connecting plate, a plugging protrusion is formed on the second connecting plate, the plugging protrusion is hinged in the plugging groove, the width dimension of the plugging protrusion along the first direction is L1, and 3mm ≤ L1 ≤ 4.8mm is satisfied.

[0010] Optionally, the width dimension of the plugging groove along the first direction is L2, the width dimension of the first connecting plate along the first direction is L, and 2.5mm ≤ (L - L2) / 2 ≤ 4.2mm is satisfied.

[0011] Optionally, the conductive electrode post further includes a rotating pin shaft. A first through hole extending along the first direction is formed in the plugging groove, a second through hole extending along the first direction is formed in the plugging protrusion, the plugging protrusion is inserted into the plugging groove, the first through hole is communicated with the second through hole, and the rotating pin shaft is rotatably inserted into the first through hole and the second through hole.

[0012] Optionally, the diameter dimension of the first through hole is D1, the thickness dimension of the first connecting plate along the second direction is T1, and 0.65mm ≤ (T1 - D1) / 2 ≤ 1.2mm is satisfied;

[0013] And / or, the diameter dimension of the second through hole is D2, the thickness dimension of the second connecting plate along the second direction is T2, and 0.65mm ≤ (T2 - D2) / 2 ≤ 1.2mm is satisfied.

[0014] Optionally, the diameter dimension of the rotating pin shaft is d, and d ≥ 0.8mm is satisfied.

[0015] Optionally, the first connecting plate includes a main body plate, a connecting plate and a fusing structure. The fusing structure is connected between the main body plate and the connecting plate. The connecting plate is hinged to the second connecting plate, and a blocking through groove is formed in the fusing structure.

[0016] Optionally, the conductive electrode post further includes an insulating rubber sleeve, and the insulating rubber sleeve is arranged outside the fusing structure.

[0017] Optionally, a receiving groove for receiving the pole column bottom plate is further formed in the first insulating member, and a plurality of limiting protrusions abutting against the pole column bottom plate are arranged on the inner wall of the receiving groove opposite to the pole column bottom plate along the first direction.

[0018] On the other hand, a battery is provided. The battery includes a battery housing, a battery cell group and the battery cover plate according to any one of the above. The battery housing is a hollow housing structure with an opening, and the battery cover plate is arranged at the opening of the battery housing to form a closed chamber for receiving the battery cell group.

[0019] Advantages of the present invention:

[0020] The present invention provides a battery cover plate. By arranging a first connecting plate and a second connecting plate which are hinged to each other on the pole plate of the conductive pole column, the second connecting plate has a welding position separated from the first insulating part and a fixing position abutting against the first insulating part. Thus, when the second connecting plate needs to be welded to the pole ear, the second connecting plate can be rotated from the fixing position abutting against the first insulating part to the welding position to separate the second connecting plate from the first insulating part. After the welding is completed, the second connecting plate is rotated from the welding position to the fixing position to abut against the first insulating part, thereby reducing the thermal influence of high temperature on the first insulating part during the welding operation, avoiding deformation of the first insulating part due to high temperature, and improving the insulation performance and assembly processability.

[0021] The present invention also provides a battery. By applying the above battery cover plate, the probability of short circuit is reduced, the product quality is improved, and due to the improvement of the assembly processability, the assembly speed is greatly increased, the assembly cycle is shortened, and the production capacity is improved. Description of the drawings

[0022] Figure 1 is an exploded view of the structure of the battery cover plate provided by the present invention;

[0023] Figure 2 is Figure 1 an enlarged view of the structure of part E in

[0024] Figure 3 is a top view of the conductive pole column in the battery cover plate provided by the present invention;

[0025] Figure 4 is a front view of the conductive pole column in the battery cover plate provided by the present invention;

[0026] Figure 5 is an exploded view of the structure of the conductive pole column in the battery cover plate provided by the present invention;

[0027] Figure 6 is a schematic diagram of the connection structure between the pole column body and the first connecting plate in the battery cover plate provided by the present invention.

[0028] In the figure:

[0029] 1. First insulating part; 11. Insertion through hole; 12. Accommodating groove; 13. Limiting protrusion;

[0030] 2. Conductive electrode post; 21. Post body; 22. Post base plate; 221. First connecting plate; 2211. Insertion groove; 2212. First through hole; 2213. Main body plate; 2214. Connecting plate; 2215. Fusing structure; 2216. Blocking through groove; 222. Second connecting plate; 2221. Insertion protrusion; 2222. Second through hole; 23. Rotating pin shaft; 24. Insulating rubber sleeve;

[0031] 3. Cover plate body;

[0032] 4. Second insulating part;

[0033] 5. Connecting block. Detailed implementation manners

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0035] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0037] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0038] Since the plastic part is arranged between the pole and the bare aluminum plate, when the pole ear and the pole are connected by welding, the high temperature generated causes the plastic part to be deformed by heat and extend in the horizontal direction, which not only reduces the thickness of the plastic part and increases the probability of the plastic part being punctured and causing a short circuit, posing a high risk and poor insulation protection, but also because the plastic part is heated and extended in the horizontal direction, the outer dimensions of the battery cover will increase, making it difficult to enter the shell and having poor assembly processability.

[0039] Therefore, in order to reduce the thermal impact on the plastic parts during welding and improve the insulation protection and assembly processability of the plastic parts, this embodiment provides a battery cover.

[0040] like Figures 1 to 6 As shown, the battery cover includes a first insulating member 1 and a conductive electrode 2, the first insulating member 1 is provided with a plug-in through hole 11, the conductive electrode 2 includes a pole body 21 and a pole bottom plate 22, the pole body 21 is inserted into the plug-in through hole 11, the pole bottom plate 22 includes a first connecting plate 221 and a second connecting plate 222, the pole body 21 is connected to the first connecting plate 221, the second connecting plate 222 is welded to the pole ear on the side away from the pole body 21, the second connecting plate 222 has a welding position separated from the first insulating member 1 and a fixed position abutting against the first insulating member 1, and the second connecting plate 222 is hinged to the first connecting plate 221 to realize the conversion between the fixed position and the welding position.

[0041] The battery cover plate is provided with a first connecting plate 221 and a second connecting plate 222 which are hinged to each other on the pole bottom plate 22 of the conductive electrode 2, so that the second connecting plate 222 has a welding position separated from the first insulating member 1 and a fixed position abutting against the first insulating member 1. Therefore, when the second connecting plate 222 needs to be welded to the pole ear, the second connecting plate 222 can be rotated from the fixed position abutting against the first insulating member 1 to the welding position, so as to realize the separation of the second connecting plate 222 from the first insulating member 1. After the welding is completed, the second connecting plate 222 is rotated from the welding position to the fixed position abutting against the first insulating member 1, thereby reducing the thermal influence of high temperature on the first insulating member 1 during the welding operation, avoiding deformation of the first insulating member 1 due to high temperature, and improving the insulation performance and assembly processability.

[0042] In this embodiment, if Figure 1As shown in the figure, the battery cover plate further includes a cover plate body 3, a second insulating member 4, and a connecting block 5. A connecting through hole corresponding to the insertion through hole 11 is provided on the cover plate body 3. One end of the pole column body 21 passing through the insertion through hole 11 is inserted into the connecting through hole and connected to the connecting block 5. The second insulating member 4 is arranged on the side of the cover plate body 3 facing away from the first insulating member 1 and is used to achieve insulation protection among the cover plate body 3, the pole column body 21, and the connecting block 5. In addition, in order to ensure the firmness when the first insulating member 1 is connected to the cover plate body 3, the first insulating member 1 is provided with a positioning protrusion outside the insertion through hole 11, and a positioning through hole adapted to the positioning protrusion is provided on the cover plate body 3. The positioning protrusion is inserted into the positioning through hole.

[0043] The battery cover plate can be a welded cover plate or a riveted cover plate. When the battery cover plate is a welded cover plate, the connecting block 5 is welded to the pole column body 21. When the battery cover plate is a riveted cover plate, the connecting block 5 is riveted to the pole column body 21. And the battery cover plate with this structure can be adapted to different types of batteries by changing the number of conductive pole columns 2. When there is one conductive pole column 2 on the battery cover plate, the battery cover plate is adapted to a blade battery. When there are two conductive pole columns 2 on the battery cover plate, the battery cover plate is adapted to a square shell battery.

[0044] Optionally, as Figure 3 、 Figure 5 shown in the figure, a plugging groove 2211 is provided on the side of the first connecting plate 221 facing the second connecting plate 222, and a plugging protrusion 2221 is provided on the second connecting plate 222. The plugging protrusion 2221 is hinged in the plugging groove 2211. The width dimension of the plugging protrusion 2221 in the first direction is L1, and 3mm ≤ L1 ≤ 4.8mm is satisfied.

[0045] By providing a plugging groove 2211 on the first connecting plate 221, a plugging protrusion 2221 on the second connecting plate 222, and hinging the plugging protrusion 2221 in the plugging groove 2211, the plugging groove 2211 and the plugging protrusion 2221 are used to achieve limiting and guiding during the rotation process, ensuring the accuracy of the rotation trajectory when the second connecting plate 222 is converted between the welding position and the fixed position, and avoiding deflection during the rotation process, which may cause difficult rotation. And by limiting the width dimension L1 of the plugging protrusion 2221 in the first direction to satisfy 3mm ≤ L1 ≤ 4.8mm, on the one hand, it avoids that the width of the plugging protrusion 2221 in the first direction is too small, resulting in poor structural strength and easy fracture. On the other hand, it avoids that the width of the plugging protrusion 2221 in the first direction is too large, resulting in too small wall thickness on both sides of the plugging groove 2211, resulting in poor structural strength and easy fracture.

[0046] In other embodiments, a plugging protrusion 2221 may also be provided on the first connecting plate 221, and a plugging groove 2211 may be formed on the second connecting plate 222. The specific arrangement may be freely selected according to requirements.

[0047] Optionally, as Figure 3 shown, the width dimension of the plugging groove 2211 in the first direction is L2, and the width dimension of the first connecting plate 221 in the first direction is L, and 2.5 mm ≤ (L - L2) / 2 ≤ 4.2 mm is satisfied.

[0048] By defining the relationship between the width dimension L of the first connecting plate 221 in the first direction and the width dimension L2 of the plugging groove 2211 in the first direction to satisfy 2.5 mm ≤ (L - L2) / 2 ≤ 4.2 mm, on the one hand, it is avoided that the remaining material in the area where the plugging groove 2211 is formed on the first connecting plate 221 is too little, resulting in poor structural strength and easy fracture, and on the other hand, it is avoided that the remaining material in the area where the plugging groove 2211 is formed on the first connecting plate 221 is too much, resulting in the compression of the space of the plugging groove 2211 and being not conducive to the assembly of the plugging groove 2211 and the plugging protrusion 2221.

[0049] Optionally, as Figure 5 shown, the conductive electrode post 2 further includes a rotating pin shaft 23. The plugging groove 2211 is provided with a first through hole 2212 extending in the first direction, and the plugging protrusion 2221 is provided with a second through hole 2222 extending in the first direction. The plugging protrusion 2221 is inserted into the plugging groove 2211, the first through hole 2212 is communicated with the second through hole 2222, and the rotating pin shaft 23 is rotatably inserted into the first through hole 2212 and the second through hole 2222.

[0050] By forming the first through hole 2212 in the plugging groove 2211 and the second through hole 2222 in the plugging protrusion 2221 and inserting the rotating pin shaft 23 into the first through hole 2212 and the second through hole 2222, the plugging protrusion 2221 is hinged in the plugging groove 2211, so that the second connecting plate 222 can freely rotate relative to the first connecting plate 221 in the direction of approaching or departing from the first insulating member 1.

[0051] Optionally, as Figure 6As shown, the diameter dimension of the first through-hole 2212 is D1, and the thickness dimension of the first connecting plate 221 in the second direction is T1, and 0.65mm ≤ (T1 - D1) / 2 ≤ 1.2mm is satisfied. By defining the relationship between the diameter dimension D1 of the first through-hole 2212 and the thickness dimension T1 of the first connecting plate 221 in the second direction, so that the two satisfy 0.65mm ≤ (T1 - D1) / 2 ≤ 1.2mm, on the one hand, it avoids that the remaining material of the first connecting plate 221 after opening the first through-hole 2212 is too little, resulting in poor structural strength of the first connecting plate 221 and being prone to fracture at the first through-hole 2212. On the other hand, it avoids that the remaining material of the first connecting plate 221 after opening the first through-hole 2212 is too much, resulting in a too large thickness of the first connecting plate 221 on the premise that the size of the rotating pin 23 has sufficient strength, increasing the occupied space, resulting in a reduction in the space for accommodating the electrode group, and causing the electrode group to not be smoothly installed.

[0052] Among them, the relationship value between the diameter dimension D1 of the first through-hole 2212 and the thickness dimension T1 of the first connecting plate 221 in the second direction can be any value between 0.65mm and 1.2mm or the range between any two values, such as 0.65mm, 0.75mm, 0.85mm, 0.95mm, 1mm, 1.1mm, 1.2mm, etc.

[0053] Optionally, as Figure 5 shown, the diameter dimension of the second through-hole 2222 is D2, and the thickness dimension of the second connecting plate 222 in the second direction is T2, and 0.65mm ≤ (T2 - D2) / 2 ≤ 1.2mm is satisfied. By defining the relationship between the diameter dimension D2 of the second through-hole 2222 and the thickness dimension T2 of the second connecting plate 222 in the second direction, so that the two satisfy 0.65mm ≤ (T2 - D2) / 2 ≤ 1.2mm, on the one hand, it avoids that the remaining material of the second connecting plate 222 after opening the second through-hole 2222 is too little, resulting in poor structural strength of the second connecting plate 222 and being prone to fracture at the second through-hole 2222. On the other hand, it avoids that the remaining material of the second connecting plate 222 after opening the second through-hole 2222 is too much, resulting in a too large thickness of the second connecting plate 222 on the premise that the size of the rotating pin 23 has sufficient strength, increasing the occupied space, resulting in a reduction in the space for accommodating the electrode group, and causing the electrode group to not be smoothly installed.

[0054] Among them, the relationship value between the diameter dimension D2 of the second through-hole 2222 and the thickness dimension T2 of the second connecting plate 222 in the second direction can be any value between 0.65mm and 1.2mm or the range between any two values, such as 0.65mm, 0.75mm, 0.85mm, 0.95mm, 1mm, 1.1mm, 1.2mm, etc.

[0055] Optionally, as Figure 4 shown, the diameter dimension of the rotating pin shaft 23 is d, and d≥0.8 mm is satisfied. By limiting the diameter dimension d of the rotating pin shaft 23 to satisfy d≥0.8 mm, it is avoided that the diameter of the rotating pin shaft 23 is too small and the tensile capacity is poor, resulting in bending deformation or even breakage when resisting tensile force.

[0056] In this embodiment, for the convenience of processing, the diameter dimension D1 of the first through hole 2212 is the same as the diameter dimension D2 of the second through hole 2222, and the thickness dimension T1 of the first connecting plate 221 is the same as the thickness dimension T2 of the second connecting plate 222. Therefore, taking the first connecting plate 221 as an example, the diameter dimension D1 of the first through hole 2212, the thickness dimension T1 of the first connecting plate 221 in the second direction, and the diameter dimension d of the rotating pin shaft 23 are verified for the influence on the structural strength of the pole bottom plate 22. As shown in Table 1, five sets of embodiments and five sets of comparative examples are provided.

[0057] Table 1

[0058]

[0059] As can be seen from Embodiments 1 to 5 in Table 1, when the relationship value between the diameter dimension D1 of the first through hole 2212 and the thickness dimension T1 of the first connecting plate 221 in the second direction satisfies the range requirement of 0.65 mm≤(T1 - D1) / 2≤1.2 mm, at this time, the remaining material of the first connecting plate 221 after opening the first through hole 2212 is sufficient, ensuring that the first connecting plate 221 has sufficient strength, avoiding the fracture of the first connecting plate 221, and the first connecting plate 221 does not occupy too much space for accommodating the pole group, so that the pole group can be smoothly inserted into the shell. When the diameter dimension d of the rotating pin shaft 23 satisfies the range of d≥0.8 mm, the rotating pin shaft 23 has sufficient tensile strength, and thus no cracks are found in the rotating pin shaft 23.

[0060] As can be seen from Comparative Examples 1 to 2 in Table 1, when the relationship value between the diameter dimension D1 of the first through hole 2212 and the thickness dimension T1 of the first connecting plate 221 in the second direction is less than the minimum value of 0.65 mm≤(T1 - D1) / 2≤1.2 mm, at this time, the remaining material of the first connecting plate 221 after opening the first through hole 2212 is too little, resulting in poor structural strength of the first connecting plate 221, and fractures and cracks occur at the first through hole 2212.

[0061] As can be seen from Comparative Examples 3 to 4 in Table 1, when the relationship value between the diameter dimension D1 of the first through hole 2212 and the thickness dimension T1 of the first connecting plate 221 in the second direction is greater than the maximum value of 0.65 mm ≤ (T1 - D1) / 2 ≤ 1.2 mm, there is too much remaining material on the first connecting plate 221 after the first through hole 2212 is opened. This results in an excessive thickness of the first connecting plate 221 while ensuring that the size of the rotating pin shaft 23 has sufficient strength, increasing the occupied space, reducing the space for accommodating the electrode group, and preventing the electrode group from being smoothly installed.

[0062] As can be seen from Comparative Example 5 in Table 1, when the diameter dimension d of the rotating pin shaft 23 is less than the minimum value of d ≥ 0.8 mm, the tensile strength of the rotating pin shaft 23 is poor at this time, resulting in bending deformation and cracks when subjected to tension.

[0063] Optionally, as Figure 6 shown, the first connecting plate 221 includes a main body plate 2213, a connecting plate 2214, and a fusing structure 2215. The fusing structure 2215 is connected between the main body plate 2213 and the connecting plate 2214. The connecting plate 2214 is hinged to the second connecting plate 222, and a blocking through groove 2216 is formed on the fusing structure 2215.

[0064] The first connecting plate 221 is formed by the main body plate 2213, the connecting plate 2214, and the fusing structure 2215. When a short circuit occurs, the high temperature generated causes the fusing structure 2215 to fuse, separating the main body plate 2213 from the connecting plate 2214. Thus, the pole body 21 connected to the main body plate 2213 is disconnected from the pole ear connected to the second connecting plate 222, improving the safety protection performance. And because the main body plate 2213 and the connecting plate 2214 are connected through the fusing structure 2215, its heat conduction ability has a smaller heat dissipation area and worse heat conduction ability compared to the first connecting plate 221 composed of an integral metal plate. Therefore, by flipping the second connecting plate 222, it is possible to avoid the second connecting plate 222 contacting the first insulating member 1 during welding, preventing the first insulating member 1 from deforming due to excessive temperature of the pole ear, improving the insulation performance and assembly processability. And a blocking through groove 2216 is formed on the fusing structure 2215, thereby reducing the cross-sectional area on the fusing structure 2215. When a short circuit occurs, due to the smaller cross-section, the heat generation is accelerated, and thus the early fusing is achieved, with better protection performance. However, because the cross-sectional area of the fusing structure 2215 is smaller after the blocking through groove 2216 is formed, it is more necessary to use the rotatable second connecting plate 222 to reduce the thermal influence of the high temperature generated during the welding of the second connecting plate 222 and the pole ear on the first insulating member 1.

[0065] In this embodiment, the conductive electrode post 2 provided with the fusing structure 2215 is generally the positive electrode post. Since the negative tab is generally made of copper, the negative electrode post connected to the negative tab is generally also made of copper. And the thermal conductivity of copper is higher, so there is no need to set the fusing structure 2215 on the negative electrode post, which can avoid waste of resources and reduce the manufacturing cost. In order to prevent the fusing structure 2215 from melting when welding the tab and the electrode post base plate 22, the melting point of the fusing structure 2215 is greater than the temperature during the welding of the tab and the electrode post base plate 22 and not greater than the temperature during a short circuit.

[0066] Optionally, as Figure 5 shown, the conductive electrode post 2 further includes an insulating rubber sleeve 24, and the insulating rubber sleeve 24 is arranged outside the fusing structure 2215. By arranging the insulating rubber sleeve 24 outside the fusing structure 2215, on the one hand, it plays an insulating and protective role to avoid arcing due to too small a gap between the first connecting plate 221 and the second connecting plate 222. On the other hand, during a short circuit, since the insulating rubber sleeve 24 is arranged outside the fusing structure 2215, it can prevent the residue after the fusing structure 2215 melts from falling into the battery interior and causing damage.

[0067] Optionally, as Figure 2 shown, the first insulating member 1 is further provided with a receiving groove 12 for receiving the electrode post base plate 22. A plurality of limiting protrusions 13 abutting against the electrode post base plate 22 are arranged on the inner wall of the receiving groove 12 opposite to the electrode post base plate 22 along the first direction. By providing the receiving groove 12 on the first insulating member 1, the electrode post base plate 22 is received in the receiving groove 12, so that there is an overlapping part between the electrode post base plate 22 and the first insulating member 1 in space, making the structure more compact, reducing the overall thickness dimension of the battery cover plate, reducing the occupied space, thereby increasing the volume of the electrode group and improving the power supply capacity. And by arranging the limiting protrusions 13 abutting against the electrode post base plate 22 on the inner wall of the receiving groove 12 opposite to the electrode post base plate 22 along the first direction, the position of the electrode post base plate 22 is limited and fixed, avoiding the problem of poor welding caused by the dislocation of the electrode post base plate 22 when welding the electrode post base plate 22 and the tab.

[0068] In this embodiment, since the electrode post base plate 22 includes a first connecting plate 221 and a second connecting plate 222, it is necessary to respectively provide the limiting protrusions 13 abutting against the first connecting plate 221 and the second connecting plate 222 to ensure the firmness of the fixation with the electrode post base plate 22. The number of the limiting protrusions 13 arranged on the single inner wall of the receiving groove 12 opposite to the electrode post base plate 22 along the first direction can be freely selected according to requirements. For example, in this embodiment, three limiting protrusions 13 are arranged on each inner wall to abut against the first connecting plate 221, and one limiting protrusion 13 is arranged to abut against the second connecting plate 222.

[0069] Optionally, asFigure 2 As shown, the number of the limiting protrusions 13 abutting on the first connecting plate 221 on each inner wall is greater than the number of the limiting protrusions 13 abutting on the second connecting plate 222. The reason why the number of the limiting protrusions 13 abutting on the first connecting plate 221 is greater than the number of the limiting protrusions 13 abutting on the second connecting plate 222 is that the temperature of the first connecting plate 221 is lower than that of the second connecting plate 222. Therefore, it is avoided that the limiting protrusions 13 are melted by heat, resulting in ineffective fixation of the pole plate 22.

[0070] In this embodiment, a battery is further provided. The battery includes a battery cell group, a battery housing, and the above battery cover plate. The battery housing is a cavity structure with an opening, and the battery cover plate is arranged at the opening of the battery housing to close the battery housing and form a receiving cavity for accommodating the battery cell group. By applying the above battery cover plate, the battery not only reduces the probability of short circuit and improves the product quality, but also greatly improves the assembly speed, shortens the assembly cycle, and improves the production capacity due to the improvement of the assembly processability.

[0071] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Battery cover plate, characterized in that The battery cover comprises: A first insulating member, wherein the first insulating member is provided with an inserting through hole; A conductive electrode, the conductive electrode comprising a pole body and a pole bottom plate, the pole body being inserted into the plug-in through hole, the pole bottom plate comprising a first connecting plate and a second connecting plate, the pole body being connected to the first connecting plate, the second connecting plate being welded to the pole ear on a side away from the pole body, the second connecting plate having a welding position separated from the first insulating member and a fixing position abutting against the first insulating member, the second connecting plate being hinged to the first connecting plate to realize the conversion between the fixing position and the welding position.

2. The battery cover plate according to claim 1, characterized in that, A plug-in groove is provided on one side of the first connecting plate toward the second connecting plate, and a plug-in protrusion is provided on the second connecting plate. The plug-in protrusion is hinged in the plug-in groove, and a width dimension of the plug-in protrusion along the first direction is L1, and satisfies 3mm≤L1≤4.8mm.

3. The battery cover plate according to claim 2, characterized in that, A width dimension of the insertion groove along the first direction is L2, a width dimension of the first connecting plate along the first direction is L, and 2.5 mm ≤ (L-L2) / 2 ≤ 4.2 mm is satisfied.

4. The battery cover plate according to claim 2, characterized in that, The conductive electrode column also includes a rotating pin shaft, the plug-in groove is provided with a first through hole extending along a first direction, the plug-in protrusion is provided with a second through hole extending along the first direction, the plug-in protrusion is inserted into the plug-in groove, the first through hole is connected to the second through hole, and the rotating pin shaft is rotatably inserted into the first through hole and the second through hole.

5. The battery cover plate according to claim 4, characterized in that, The diameter of the first through hole is D1, the thickness of the first connecting plate along the second direction is T1, and 0.65 mm ≤ (T1-D1) / 2 ≤ 1.2 mm is satisfied; And / or, a diameter dimension of the second through hole is D2, a thickness dimension of the second connecting plate along the second direction is T2, and 0.65 mm ≤ (T2 - D2) / 2 ≤ 1.2 mm is satisfied.

6. The battery cover plate according to claim 4, wherein The diameter of the rotating pin is d, and satisfies d≥0.8mm.

7. The battery cover plate according to claim 1, characterized in that, The first connecting plate includes a main body plate, a connecting plate and a fuse structure, the fuse structure is connected between the main body plate and the connecting plate, the connecting plate is hinged to the second connecting plate, and a blocking through groove is opened on the fuse structure.

8. The battery cover plate according to claim 7, wherein, The conductive electrode column also includes an insulating rubber sleeve, and the insulating rubber sleeve is arranged outside the fuse structure.

9. The battery cover plate according to claim 1, characterized in that, The first insulating member is also provided with a receiving groove for accommodating the pole bottom plate, and a plurality of limiting protrusions abutting against the pole bottom plate are provided on the inner wall of the receiving groove opposite to the pole bottom plate along the first direction.

10. A battery, characterized in that, The battery comprises a battery shell, a pole group and a battery cover as described in any one of claims 1 to 9, wherein the battery shell is a hollow shell structure with an opening, and the battery cover is arranged at the opening of the battery shell to form a closed chamber for accommodating the pole group.

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