Battery cover plate, battery pack and vehicle

Abstract

The utility model discloses a battery cover plate, a battery pack and a vehicle, the battery cover plate comprises a cover plate main body; the insulating part is arranged in the cover plate main body; the conductive connecting piece is arranged on the insulating piece in a penetrating manner; wherein the insulating piece is provided with one of a limiting protrusion and a limiting groove, the conductive connecting piece is provided with the other one of the limiting protrusion and the limiting groove, and the limiting protrusion and the limiting groove are matched in a concave-convex mode. Therefore, through the arrangement of the battery cover plate, the connection contact area of the conductive connecting piece and the insulating piece can be increased, so that the connection adhesive force between the conductive connecting piece and the insulating piece is larger, and the mutual limiting effect can be enhanced through the concave-convex matching effect of the limiting bulge and the limiting groove; therefore, the risk that the conductive connecting piece falls off from the insulating piece is reduced, and the connection tightness between the conductive connecting piece and the insulating piece is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially is related to a battery cover plate, battery package and vehicle. BACKGROUND

[0002] With the rapid development of new energy automobile industry, the use scale of power battery is bigger and bigger, and the vehicle enterprises are faced with huge cost competition pressure, and it is urgent to develop a new type of minimalist cover plate with simple manufacturing process and low manufacturing cost in the current situation.

[0003] In the related art, the power battery cover plates on the market mainly include riveted cover plates, ceramic cover plates and injection molded cover plates, which have differences in structure, but the components are basically the same (such as light cover plates, pole columns, sealing elements, insulating plastic elements, explosion-proof valves and lead-out sheets), and no matter which form of cover plate has the problems of more components, complex structure and difficult to assemble. At the same time, the existing conductive connecting pieces have the risk of falling off from the cover plate, which reduces the safety of the battery during use. SUMMARY

[0004] The utility model aims at at least one of the technical problems existing in the prior art. Therefore, one purpose of the utility model is to provide a battery cover plate which can increase the connection contact area of the conductive connecting piece and the insulating piece, thereby increasing the connection adhesion between the conductive connecting piece and the insulating piece, and the limiting action of the limiting protrusion and the limiting groove can be enhanced through the concave-convex matching effect, thereby reducing the risk of the conductive connecting piece falling off from the insulating piece.

[0005] The utility model further provides a battery pack.

[0006] The utility model further provides a vehicle.

[0007] According to the battery cover plate of the utility model, the battery cover plate comprises a cover plate body, an insulating piece arranged in the cover plate body, and a conductive connecting piece penetrating the insulating piece, wherein the insulating piece is provided with one of a limiting protrusion and a limiting groove, the conductive connecting piece is provided with the other one of the limiting protrusion and the limiting groove, and the limiting protrusion and the limiting groove are concave-convex matched.

[0008] Therefore, by arranging the battery cover plate, the connection contact area of the conductive connecting piece and the insulating piece can be increased, thereby increasing the connection adhesion between the conductive connecting piece and the insulating piece, and the limiting action of the limiting protrusion and the limiting groove can be enhanced through the concave-convex matching effect, thereby reducing the risk of the conductive connecting piece falling off from the insulating piece, and further improving the connection tightness between the two.

[0009] In some examples of the utility model, the conductive connecting piece includes: first connecting sheet and second connecting sheet, the first connecting sheet and the second connecting sheet are different in material, the first connecting sheet is connected with the second connecting sheet, and the connecting place of the first connecting sheet and the second connecting sheet is located in the insulating piece; the first connecting sheet and / or the second connecting sheet are provided with the other one of the limiting protrusions and the limiting grooves.

[0010] In some examples of the utility model, the other one of the limiting protrusions and the limiting grooves on the first connecting sheet is multiple and oppositely arranged on both sides of the width direction of the first connecting sheet; the other one of the limiting protrusions and the limiting grooves on the second connecting sheet is multiple and oppositely arranged on both sides of the width direction of the second connecting sheet.

[0011] In some examples of the utility model, the other one of the limiting protrusions and the limiting grooves on the first connecting sheet is multiple and oppositely arranged on both sides of the thickness direction of the first connecting sheet; the other one of the limiting protrusions and the limiting grooves on the second connecting sheet is multiple and oppositely arranged on both sides of the thickness direction of the second connecting sheet.

[0012] In some examples of the utility model, the minimum distance of the other one of the limiting protrusions and the limiting grooves on the first connecting sheet to the connecting place of the first connecting sheet and the second connecting sheet is d1; the minimum distance of the other one of the limiting protrusions and the limiting grooves on the second connecting sheet to the connecting place of the first connecting sheet and the second connecting sheet is d2; wherein, d1=d2.

[0013] In some examples of the utility model, the outer surfaces of the cover plate body, the first connecting sheet and the second connecting sheet are formed with nano holes; the insulating piece is an injection molding piece, and the insulating piece is injection molded with the cover plate body, the first connecting sheet and the second connecting sheet and partially filled in the nano holes.

[0014] In some examples of the utility model, the first connecting sheet is a copper connecting sheet, the caliber of the nano hole on the copper connecting sheet is a, and the a satisfies the relationship formula 20nm≤a≤80nm; the second connecting sheet is an aluminum connecting sheet, the caliber of the nano hole on the aluminum connecting sheet is b, and the b satisfies the relationship formula 400nm≤b≤800nm.

[0015] In some examples of the utility model, one of assembly protrusion and assembly recess is arranged on the side of first connecting sheet close to second connecting sheet, the other of assembly protrusion and assembly recess is arranged on the side of second connecting sheet close to first connecting sheet, and the assembly protrusion is assembled in the assembly recess.

[0016] In some examples of the utility model, the limiting recess is configured as a trapezoidal recess, and the width of the slot opening of the limiting recess is less than the width of the slot bottom.

[0017] In some examples of the utility model, the insulating piece is sleeved on the outer periphery of the conductive connecting piece, the outer periphery of the insulating piece is formed with a mounting groove, the cover plate body is formed with a through hole, and the edge of the through hole is fitted in the mounting groove.

[0018] In some examples of the utility model, at least one side of the insulating piece in the thickness direction is formed with a boss surrounding the conductive connecting piece.

[0019] In some examples of the utility model, the battery cover plate further comprises an explosion-proof valve, the explosion-proof valve is arranged on the cover plate body, and the explosion-proof valve is laser-welded and connected with the cover plate body.

[0020] According to the battery pack of the second aspect of the utility model, the above-mentioned battery cover plate is included.

[0021] According to the vehicle of the third aspect of the utility model, the above-mentioned battery pack is included.

[0022] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0024] Figure 1 is a structural schematic view of a battery cover plate according to an embodiment of the utility model;

[0025] Figure 2 is another structural schematic view of a battery cover plate according to an embodiment of the utility model;

[0026] Figure 3 is a sectional view of a battery cover plate according to an embodiment of the utility model;

[0027] Figure 4 is a sectional view of a conductive connecting piece and an insulating piece according to an embodiment of the utility model;

[0028] Figure 5 is a cross-sectional view of the conductive connecting piece and the insulating piece according to another embodiment of the utility model.

[0029] Reference signs:

[0030] 100, battery cover plate;

[0031] 1, cover plate body;

[0032] 2, insulating piece; 21, mounting groove; 22, boss;

[0033] 3, conductive connecting piece; 31, first connecting piece; 32, second connecting piece;

[0034] 4, limiting protrusion; 5, limiting groove; 6, assembly protrusion; 7, assembly groove; 8, explosion-proof valve. DETAILED DESCRIPTION

[0035] The embodiments of the utility model are described in detail below, and the embodiments described with reference to the drawings are exemplary.

[0036] The embodiments of the utility model are described in detail below, and the embodiments described with reference to the drawings are exemplary. Figures 1-5 The battery cover plate 100 according to the embodiments of the utility model can increase the connecting contact area of the conductive connecting piece 3 and the insulating piece 2, so that the connecting adhesion between the conductive connecting piece 3 and the insulating piece 2 is greater, and the limiting effect of the limiting protrusion 4 and the limiting groove 5 on each other can be enhanced through the concave-convex matching effect, thereby reducing the risk of the conductive connecting piece 3 falling off from the insulating piece 2.

[0037] Combined Figures 1-5 As shown in the figure, the battery cover plate 100 according to the first aspect of the embodiments of the utility model comprises a cover plate body 1, an insulating piece 2 and a conductive connecting piece 3. Among them, the cover plate body 1 constitutes the main force structure of the battery shell, which can play a structural protection role on the battery cell; the insulating piece 2 can play an insulating effect inside and outside the battery cover plate 100, avoiding the risk of leakage and short circuit of the battery cell, thereby improving the safety of the battery pack; the conductive connecting piece 3 can be used as a connecting carrier of the related elements outside the battery cover plate 100, thereby realizing the effect of transmitting electric energy or electric signal between different elements.

[0038] Specifically, the insulating piece 2 is arranged in the cover plate body 1, and the conductive connecting piece 3 is arranged through the insulating piece 2; wherein the insulating piece 2 is provided with one of the limiting protrusion 4 and the limiting groove 5, the conductive connecting piece 3 is provided with the other one of the limiting protrusion 4 and the limiting groove 5, and the limiting protrusion 4 and the limiting groove 5 are concave-convex matched. For example, the insulating piece 2 can be filled with nano injection between the cover plate body 1 and the conductive connecting piece 3, so that the insulating piece 2 plays the role of insulation, pressure resistance, sealing and fixed support at the same time.

[0039] For example, the insulating piece 2 is provided with the limiting protrusion 4, the conductive connecting piece 3 is provided with the limiting groove 5, the limiting protrusion 4 and the limiting groove 5 are matched in concave-convex mode, so that the contact area of the insulating piece 2 and the conductive connecting piece 3 can be increased, the connecting adhesion between the insulating piece 2 and the conductive connecting piece 3 is larger, and the connecting strength between the insulating piece 2 and the conductive connecting piece 3 is enhanced; the limiting effect of the limiting protrusion 4 and the limiting groove 5 on each other is enhanced through the connecting mode of the limiting protrusion 4 and the limiting groove 5 matched in concave-convex mode, so that the anti-disengagement effect of the conductive connecting piece 3 and the supporting strength of the insulating piece 2 on the conductive connecting piece 3 are enhanced, and the position stability between the insulating piece 2 and the conductive connecting piece 3 is improved.

[0040] Compared with the traditional battery cover plate (such as a riveted cover plate, a ceramic cover plate and an injection molded cover plate, although the structures of the cover plates are different, the components are basically the same, and the processes such as sealing ring assembly, pole assembly, insulating plastic part assembly and metal part welding are all included), the embodiment can omit some processes and components in the manufacturing process of the battery cover plate 100 under the premise of ensuring the performance of the battery cover plate 100, thereby reducing the manufacturing cost and increasing the use space inside the battery.

[0041] Therefore, by arranging the battery cover plate 100, the connecting contact area of the conductive connecting piece 3 and the insulating piece 2 can be increased, the connecting adhesion between the conductive connecting piece 3 and the insulating piece 2 is larger, and the limiting effect of the limiting protrusion 4 and the limiting groove 5 on each other can be enhanced through the concave-convex matching effect, so that the risk of the conductive connecting piece 3 falling off from the insulating piece 2 is reduced, and the connecting tightness between the conductive connecting piece 3 and the insulating piece 2 is improved.

[0042] According to some optional embodiments of the utility model, as shown in Figures 1-5 The conductive connecting piece 3 includes a first connecting piece 31 and a second connecting piece 32, the materials of the first connecting piece 31 and the second connecting piece 32 are different, the first connecting piece 31 is connected with the second connecting piece 32, and the connecting position of the first connecting piece 31 and the second connecting piece 32 is located in the insulating piece 2; the first connecting piece 31 and / or the second connecting piece 32 is provided with the other one of the limiting protrusion 4 and the limiting groove 5.

[0043] The conductive connecting piece 3 can connect the positive and negative materials in the battery cell with the external circuit, so that the current can flow into and out of the battery cell smoothly.

[0044] In addition, the materials of the first connecting piece 31 and the second connecting piece 32 are different, mainly to meet different electrical properties, mechanical properties and cost requirements.

[0045] In detail, different materials have different conductivities, for example, copper has very high conductivity, while aluminum has slightly lower conductivity, but is lighter and has lower cost; different materials have different chemical stability, during the operation of the battery cell, the electrolyte and the electrode material will undergo chemical reaction, so the conductive connecting piece 3 needs to have good corrosion resistance to prevent the conductive connecting piece 3 from being eroded by the electrolyte during long-term use. For example, copper is relatively stable to some electrolyte components, while aluminum may need surface treatment to improve its corrosion resistance. In summary, the conductive connecting piece 3 adopts two different materials, which can improve the chemical stability of the conductive connecting piece 3, reduce the weight and manufacturing cost of the conductive connecting piece 3 under the premise of ensuring the conductivity.

[0046] Further, as shown in Figures 1-5 The first connecting piece 31 and the second connecting piece 32 are provided with limiting grooves 5, and the first connecting piece 31 and the second connecting piece 32 can also be provided with limiting protrusions 4, and the first connecting piece 31 or the second connecting piece 32 can be provided with limiting grooves 5, not limited thereto. For example, the first connecting piece 31 and the second connecting piece 32 are both provided with limiting grooves 5, so that the limiting protrusions 4 on the insulating piece 2 and the limiting grooves 5 on the first connecting piece 31 and the second connecting piece 32 are matched in concave-convex, thereby increasing the connection strength between the insulating piece 2 and the conductive connecting piece 3, and also increasing the bonding strength between the first connecting piece 31 and the second connecting piece 32, and reducing the risk of fracture and falling off of the connection bonding surface of the first connecting piece 31 and the second connecting piece 32.

[0047] Specifically, as shown in Figures 1-4 The limiting protrusions 4 and the other of the limiting grooves 5 on the first connecting piece 31 are multiple and oppositely arranged on both sides in the width direction of the first connecting piece 31; the limiting protrusions 4 and the other of the limiting grooves 5 on the second connecting piece 32 are multiple and oppositely arranged on both sides in the width direction of the second connecting piece 32.

[0048] Among them, multiple limiting protrusions 4 or limiting grooves 5 can increase the number of concave-convex matching positions, thereby increasing the mutual contact area and limiting position between the insulating piece 2 and the conductive connecting piece 3, and further enhancing the adhesion of the insulating piece 2 on the conductive connecting piece 3, and improving the positional stability between the two. In addition, multiple limiting protrusions 4 or limiting grooves 5 can increase the limiting effect of the insulating piece 2 on the conductive connecting piece 3, thereby further enhancing the positional stability between the insulating piece 2 and the conductive connecting piece 3.

[0049] For example, the first connecting piece 31 is provided with limiting protrusions 4, and the second connecting piece 32 is provided with limiting grooves 5, and the limiting protrusions 4 on the first connecting piece 31 and the limiting grooves 5 on the second connecting piece 32 are oppositely arranged on both sides in the width direction of the first connecting piece 31 and the second connecting piece 32, respectively. Such arrangement can simplify the processing and manufacturing difficulty and improve the manufacturability.

[0050] Further, as shown in Figure 5 Further, as shown in

[0051] Further, as shown in

[0052] For example, the first connecting piece 31 is provided with the limiting protrusions 4, and the second connecting piece 32 is provided with the limiting grooves 5. In this way, the first connecting piece 31 and the second connecting piece 32 can be connected to each other in a simple and convenient manner.

[0053] Further, as shown in Figure 4 Further, as shown in

[0054] For example, the first connecting piece 31 is provided with the limiting protrusions 4, and the second connecting piece 32 is provided with the limiting grooves 5. In this way, the first connecting piece 31 and the second connecting piece 32 can be connected to each other in a simple and convenient manner.

[0055] Further, as shown in Figures 1-5 Further, as shown in

[0056] As arranged above, part of the rubber material on the insulating member 2 can flow into the nanometer holes on the surface of the cover plate body 1, the first connecting piece 31 and the second connecting piece 32, so that the insulating member 2 is combined with the cover plate body 1 and the conductive connecting piece 3 in physical and chemical levels, thereby improving the overall combination strength and sealing effect of the battery cover plate 100.

[0057] In addition, the insulating member 2 can also seal the gap between the cover plate body 1 and the conductive connecting piece 3. Compared with the conventional sealing member which is directly assembled in the cover plate body (which requires a certain precision for the machining of the cover plate body to ensure the accuracy of assembly, has a low degree of automation, and is easy to scratch during manual assembly, resulting in a high rejection rate), the insulating member 2, the conductive connecting piece 3 and the cover plate body 1 in the embodiment can be directly injection molded as a whole (for example, a limiting protrusion 4 is extruded in a specific area of the conductive connecting piece 3 by a stamping process, and then injection molded, and during the molding process, the sealing member of the plastic material is tightly wrapped around the limiting protrusion 4 and fused into one body), thereby reducing the production process, reducing the rejection rate, improving the manufacturing efficiency, and saving costs.

[0058] Furthermore, compared with the direct injection molding of the insulating member and the conductive connecting piece (the peeling force of the insulating member of the plastic material after injection molding is not enough, and there is a gap between the insulating member and the conductive connecting piece, and the insulating member may fall off and the sealing may fail), the insulating member 2 and the conductive connecting piece 3 in the embodiment are matched by the limiting protrusion 4 and the limiting recess 5, which can increase the connection contact area and the limiting effect between the insulating member 2 and the conductive connecting piece 3, thereby increasing the adhesion between the insulating member 2 and the conductive connecting piece 3, and further increasing the positional stability therebetween.

[0059] Further, compared with the conventional battery cover plate which adopts the assembly of a sealing ring for insulation sealing, the precision of the compression amount of the sealing ring is high, which greatly increases the assembly difficulty of the battery cover plate. As the sealing ring ages, the rebound force decreases, and the insulation sealing effect gradually weakens, which to some extent increases the safety hazard of the battery. The embodiment in the application can use the nano injection molding technology and use PPS, PBT and other materials as the insulating member 2 to replace the sealing ring for insulation sealing, thereby avoiding the problems of missing, aging and unstable compression amount of the sealing ring of the battery cover plate 100, and further increasing the safety of the battery in use.

[0060] Specifically, the first connecting piece 31 is a copper connecting piece, the aperture of the nanometer hole on the copper connecting piece is a, and a satisfies the relationship 400nm≤a≤800nm; the second connecting piece 32 is an aluminum connecting piece, the aperture of the nanometer hole on the aluminum connecting piece is b, and b satisfies the relationship 20nm≤b≤80nm.

[0061] Among them, the nanopores on the copper connecting piece have a larger diameter, and copper is harder than aluminum and has higher mechanical strength. Therefore, while ensuring the structural strength of the copper connecting piece, larger nanopores can be opened to increase the filling amount of the injection molded part in the nanopores, thereby increasing the connection strength between the insulating part 2 and the copper connecting piece; since aluminum is softer than copper, the nanopores on the aluminum connecting piece have a smaller diameter, which can reduce stress concentration, thereby enhancing the bonding strength between the aluminum connecting piece and the insulating part 2 while improving the tensile strength and fatigue life of the aluminum connecting piece, and can also provide a higher current density in the local area, thereby increasing the output power of the battery, and can also increase the specific surface area of ​​the material, which helps to improve the heat conduction efficiency, thereby improving the heat dissipation performance of the aluminum connecting piece.

[0062] Further, combined with Figure 4 As shown, the first connecting piece 31 is provided with one of the assembly protrusions 6 and the assembly grooves 7 on the side close to the second connecting piece 32, and the second connecting piece 32 is provided with the other of the assembly protrusions 6 and the assembly grooves 7 on the side close to the first connecting piece 31, and the assembly protrusion 6 is assembled in the assembly groove 7.

[0063] For example, an assembly protrusion 6 is provided on one side of the first connecting piece 31 close to the second connecting piece 32, and an assembly groove 7 is provided on the side of the second connecting piece 32 close to the first connecting piece 31. The assembly groove 7 and the assembly protrusion 6 are matched with each other in a concave-convex manner, so that the contact area between the first connecting piece 31 and the second connecting piece 32 can be increased, thereby increasing the connection strength between the two; the limiting effect of each other can also be enhanced by the concave-convex matching connection between the assembly groove 7 and the assembly protrusion 6, thereby enhancing the anti-slip effect of each other, and then improving the positional stability between the two.

[0064] Moreover, compared with the traditional connection method of combining connecting pieces of different materials by friction welding, the embodiment in this case can rivet the assembly protrusion 6 and the assembly groove 7 together, thereby combining the first connecting piece 31 and the second connecting piece 32 together, thereby reducing the manufacturing cost of the conductive connector 3.

[0065] Specifically, combined Figure 4 As shown, the limiting groove 5 is constructed as a trapezoidal groove, and the width of the notch of the limiting groove 5 is smaller than the width of the groove bottom. The operator can squeeze the limiting protrusion 4 into the preset trapezoidal groove by means of pressure riveting or flat riveting. Since the notch is narrow, the limiting protrusion 4 will be stuck by the wider groove bottom part after entering the trapezoidal groove and reaching the groove bottom, thereby effectively preventing the risk of the limiting protrusion 4 from escaping. In addition, the shape of the trapezoidal groove can better fit the limiting protrusion 4, thereby increasing the contact area at the connection between the limiting protrusion 4 and the limiting groove 5 and improving the connection strength.

[0066] According to some optional embodiments of the present invention, combined with Figure 1 and Figure 2 As shown, the insulating member 2 is sleeved on the outer periphery of the conductive connector 3 , and a mounting groove 21 is formed on the outer periphery of the insulating member 2 . The cover body 1 is formed with a through hole, and the edge of the through hole fits into the mounting groove 21 .

[0067] Specifically, the conductive connector 3 passes through the through-hole of the cover body 1, so that the conductive connector 3 can smoothly electrically connect the relevant components inside and outside the battery. The insulating member 2 is sleeved on the outer periphery of the conductive connector 3, so that the insulation and sealing around the conductive connector 3 can be ensured, and the mounting groove 21 formed on the outer periphery of the insulating member 2 cooperates with the edge of the through-hole, so that the insulating member 2 can be firmly installed on the cover body 1, thereby ensuring the overall structural stability of the battery cover 100.

[0068] According to some optional embodiments of the present invention, combined with Figure 1 and Figure 2 As shown, a boss 22 surrounding the conductive connection member 3 is formed on at least one side of the insulating member 2 in the thickness direction.

[0069] In detail, the boss 22 can increase the insulation distance between the insulating part 2 and the conductive connector 3, thereby effectively preventing current from leaking through the insulating part 2 and reducing the risk of short circuit; it can also provide additional mechanical protection (for example, during transportation, installation or use, the boss 22 can serve as a buffer layer to protect the conductive connector 3 from impact or extrusion), preventing the conductive connector 3 from external physical damage; it can also form a barrier to prevent moisture and other contaminants from entering the space around the conductive connector 3; it can also serve as a gripping force point, thereby facilitating the improvement of disassembly and installation efficiency.

[0070] According to some optional embodiments of the present invention, combined with Figure 1 and Figure 2 As shown, the battery cover 100 further includes an explosion-proof valve 8 , which is disposed on the cover body 1 , and is connected to the cover body 1 by laser welding.

[0071] Specifically, the primary function of explosion-proof valve 8 is to release gas when the internal pressure of the battery is too high, thereby preventing the battery from exploding due to overpressure. Explosion-proof valve 8 is laser welded to cover plate body 1. Laser welding achieves a high-strength connection with good airtightness, thereby improving the strength and sealing of the connection between explosion-proof valve 8 and cover plate body 1.

[0072] In addition, the explosion-proof valve 8 can be made of metal materials with good electrical properties such as aluminum and steel, and can be obtained by processing techniques such as stamping and machining, with low production difficulty.

[0073] The following describes the manufacturing process of the battery cover 100:

[0074] Firstly, the combination position surfaces of the cover plate body 1, the conductive connecting piece 3 and the plastic insulation piece 2 are provided with nano holes, plastic material is injected between the cover plate body 1 and the conductive connecting piece 3 under the condition of mold temperature 125±5℃ to form the plastic insulation piece 2, so that the cover plate body 1, the conductive connecting piece 3 and the plastic insulation piece 2 have the characteristics of high connection strength and good sealing performance; secondly, the four limiting protrusions 4 structures on the plastic insulation piece 2 are connected and fixed with the two limiting grooves 5 structures provided on the aluminum connecting sheet and the two limiting grooves 5 structures provided on the copper connecting sheet, so that the nano injection molding combination area is expanded, the combination strength is increased, and the copper-aluminum connecting surface of the copper-aluminum connecting sheet is supported, thereby reducing the fracture risk of the copper-aluminum connecting surface; further, the cover plate body 1 is connected with the explosion-proof valve 8 through laser welding, plays a role of pressure relief and explosion prevention, and ensures the safety of battery use.

[0075] Further, the embodiment of the application proposes a structure of a composite copper-aluminum connecting sheet through riveting, the aluminum connecting sheet is provided with a right trapezoidal assembly protrusion 6, the assembly protrusion 6 is extruded into a preset right trapezoidal assembly groove 7 in the copper connecting sheet through pressure riveting or flat riveting, so that the aluminum connecting sheet and the copper connecting sheet are better matched, which can meet the performance use requirements and reduce the cost. The above-mentioned right trapezoidal shape is defined according to the size of the actual use cover plate, which is not limited here.

[0076] The battery pack according to the second aspect of the application comprises the battery cover plate 100 according to the above-mentioned embodiment, so that the battery pack with the battery cover plate 100 can improve the connection strength between the conductive connecting piece 3 and the cover plate body 1, reduce the risk of falling of the conductive connecting piece 3, reduce the number of parts of the battery cover plate 100, simplify the manufacturing process of the battery cover plate 100, and thus improve the practicability and economy.

[0077] The vehicle according to the third aspect of the application comprises the battery pack according to the above-mentioned embodiment, so that the vehicle with the battery pack can reduce the production cost of the battery pack, increase the effective arrangement space inside the battery pack, and thus improve the market competitiveness of the whole vehicle.

[0078] In the description of the application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0079] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0080] In the description of the application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In the description of the application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0081] Although the embodiments of the application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the application, and the scope of the application is defined by the claims and their equivalents.

[0082] In the description of the application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application. In the description of the application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0083] Although the embodiments of the application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the application, and the scope of the application is defined by the claims and their equivalents.

Claims

1. A battery cover (100), characterized in that: include: Cover plate body (1); An insulating member (2), the insulating member (2) being arranged in the cover plate body (1); A conductive connecting member (3), wherein the conductive connecting member (3) passes through the insulating member (2); The insulating member (2) is provided with one of a limiting protrusion (4) and a limiting groove (5), and the conductive connecting member (3) is provided with the other of a limiting protrusion (4) and a limiting groove (5), and the limiting protrusion (4) and the limiting groove (5) are matched in a concave-convex manner.

2. The battery cover (100) according to claim 1, characterized in that: The conductive connecting member (3) comprises: a first connecting piece (31) and a second connecting piece (32), wherein the first connecting piece (31) and the second connecting piece (32) are made of different materials, the first connecting piece (31) and the second connecting piece (32) are connected, and a connection point between the first connecting piece (31) and the second connecting piece (32) is located inside the insulating member (2); The first connecting piece (31) and / or the second connecting piece (32) is provided with the other of the limiting protrusion (4) and the limiting groove (5).

3. The battery cover (100) according to claim 2, characterized in that: The other of the limiting protrusions (4) and the limiting grooves (5) on the first connecting piece (31) is plural and arranged opposite to each other on both sides of the width direction of the first connecting piece (31); The other of the limiting protrusions (4) and the limiting grooves (5) on the second connecting piece (32) is multiple and is arranged opposite to each other on both sides of the width direction of the second connecting piece (32).

4. The battery cover (100) according to claim 2, characterized in that: The other of the limiting protrusions (4) and the limiting grooves (5) on the first connecting piece (31) is plural and arranged opposite to each other on both sides of the thickness direction of the first connecting piece (31); The other of the limiting protrusions (4) and the limiting grooves (5) on the second connecting piece (32) is multiple and is arranged opposite to each other on both sides of the thickness direction of the second connecting piece (32).

5. The battery cover (100) according to claim 2, characterized in that: The minimum distance between the other of the limiting protrusion (4) and the limiting groove (5) on the first connecting piece (31) and the connection point between the first connecting piece (31) and the second connecting piece (32) is d1; The minimum distance between the other of the limiting protrusion (4) and the limiting groove (5) on the second connecting piece (32) and the connection point between the first connecting piece (31) and the second connecting piece (32) is d2; Where d1=d2.

6. The battery cover (100) according to claim 2, characterized in that: Nanopores are formed on the outer surfaces of the cover plate body (1), the first connecting piece (31) and the second connecting piece (32); The insulating member (2) is an injection-molded member, and the insulating member (2) is respectively injection-molded with the cover plate body (1), the first connecting piece (31), and the second connecting piece (32), and partially fills the nanopore.

7. The battery cover (100) according to claim 6, characterized in that: The first connecting piece (31) is a copper connecting piece, the diameter of the nanopore on the copper connecting piece is a, and a satisfies the relationship 400nm≤a≤800nm; The second connecting piece (32) is an aluminum connecting piece, and the diameter of the nanopore on the aluminum connecting piece is b, and b satisfies the relationship 20nm≤b≤80nm.

8. The battery cover (100) according to claim 2, characterized in that: One of an assembly protrusion (6) and an assembly groove (7) is provided on a side of the first connecting piece (31) close to the second connecting piece (32), and the other of an assembly protrusion (6) and an assembly groove (7) is provided on a side of the second connecting piece (32) close to the first connecting piece (31), and the assembly protrusion (6) is assembled in the assembly groove (7).

9. The battery cover (100) according to claim 8, characterized in that: The limiting groove (5) is constructed as a trapezoidal groove, and the width of the groove opening of the limiting groove (5) is smaller than the width of the groove bottom.

10. The battery cover (100) according to claim 1, characterized in that: The insulating member (2) is sleeved on the outer periphery of the conductive connecting member (3); a mounting groove (21) is formed on the outer periphery of the insulating member (2); a through hole is formed on the cover plate body (1); and an edge of the through hole fits into the mounting groove (21).

11. The battery cover (100) according to claim 1, characterized in that: A boss (22) surrounding the conductive connecting member (3) is formed on at least one side of the insulating member (2) in the thickness direction.

12. The battery cover (100) according to claim 1, characterized in that: Also includes: An explosion-proof valve (8), the explosion-proof valve (8) is arranged on the cover plate body (1), and the explosion-proof valve (8) is connected to the cover plate body (1) by laser welding.

13. A battery pack, characterized in that: include: The battery cover (100) according to any one of claims 1 to 12.

14. A vehicle, characterized in that: include: The battery pack according to claim 13.

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