Battery pack assembly and battery

Abstract

The utility model discloses a battery pack assembly and a battery. The battery pack assembly comprises a metal cover plate, a first insulating piece and a first connecting piece, the metal cover plate comprises more than two electric connection parts, and the electric connection parts are arranged at intervals and are electrically connected with the metal cover plate. The first insulating part is connected with the inner surface of the metal cover plate, and the first insulating part is provided with more than two first mounting holes. The first connecting piece is arranged on the side, away from the metal cover plate, of the first insulating piece, the electric connecting part or the first connecting piece penetrates through the first mounting hole, and the electric connecting part is connected with the first connecting piece. According to the battery pack assembly, the metal cover plate is simultaneously used as anodes or cathodes of more than two battery cells, and is directly and electrically connected with the first connecting piece, so that parts such as a pole column, an insulating sealing piece and an external busbar at the first connecting piece are omitted, the assembly procedures of the battery pack assembly are reduced, the assembly efficiency is improved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of power batteries and energy storage batteries, and more specifically, to a battery pack assembly and a battery. Background Technology

[0002] Lithium-ion batteries are widely used in power batteries, energy storage batteries, and other technological fields. Power batteries provide power for tools, typically powering electric vehicles, electric trains, electric bicycles, golf carts, and other similar vehicles, and are core components of new energy vehicles. Energy storage batteries are commonly used in home energy storage, power stations for solar and wind power generation equipment, portable power supplies, communication base stations, and as batteries for storing renewable energy. The two types of batteries have different application scenarios, and their performance and design differ.

[0003] The aforementioned batteries typically consist of multiple individual cells, which are connected in series or parallel to form a battery module. For example, cylindrical batteries use nickel or copper sheets to connect the positive and negative electrodes via laser welding, forming a series / parallel structure. Prismatic / pouch batteries use metal busbars fixed by bolts or welding to form a series / parallel circuit. In existing technologies, metal connecting pieces or busbars need to be welded between individual cells, making the assembly process cumbersome. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned defects in the prior art and provide a battery pack assembly, including a top cover assembly, wherein the top cover assembly includes:

[0005] A metal cover plate, the metal cover plate including two or more electrical connection parts, each of the electrical connection parts being spaced apart, and the electrical connection parts being electrically connected to the metal cover plate;

[0006] A first insulating element is connected to the inner surface of the metal cover plate, and the first insulating element is provided with two or more first mounting holes;

[0007] A first connector is disposed on the side of the first insulating member opposite to the metal cover plate. The electrical connection portion or the first connector passes through the first mounting hole, and the electrical connection portion is connected to the first connector.

[0008] This utility model also discloses a battery, including the aforementioned battery pack assembly.

[0009] Implementing the embodiments of this utility model will have the following beneficial effects:

[0010] The battery pack assembly disclosed in this utility model includes a metal cover plate, a first insulating component, and a first connecting component. The metal cover plate includes two or more electrical connection portions, which are spaced apart and electrically connected to the metal cover plate and the first connecting component. The metal cover plate simultaneously serves as the positive or negative electrode of two or more battery cells. The metal cover plate is directly electrically connected to the first connecting component, eliminating the need for components such as terminals, insulating seals, and external busbars at the first connecting component. This reduces the assembly steps of the battery pack assembly, improves assembly efficiency, and lowers manufacturing costs. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] in:

[0013] Figure 1 A schematic diagram of a battery pack assembly provided in an embodiment of this utility model;

[0014] Figure 2 for Figure 1 A cross-sectional view along the M-M' direction;

[0015] Figure 3 for Figure 1 A cross-sectional view along the N-N' direction;

[0016] Figure 4 for Figure 3 An enlarged schematic diagram of region A in the middle;

[0017] Figure 5 for Figure 1 Another cross-sectional view along the N-N' direction;

[0018] Figure 6 for Figure 5 An enlarged schematic diagram of region B in the middle;

[0019] Figure 7 A schematic diagram of a battery provided in an embodiment of this utility model;

[0020] 100-Battery pack assembly, 1-Metal cover plate, 11-Electrical connection part, 2-First insulator, 21-Second protruding end, 3-First connector, 4-Pole block, 5-Second insulator, 51-First protruding end, 6-Second connector, 7-Sealing part, 200-Battery casing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figure 1 , Figure 2 This utility model discloses a battery pack assembly 100, including a metal cover plate 1, a first insulating member 2 and a first connecting member 3.

[0023] The metal cover plate 1 includes two or more electrical connection parts 11, which are spaced apart and are electrically connected to the metal cover plate 1.

[0024] The first insulating element 2 is connected to the inner surface of the metal cover plate 1, and the first insulating element 2 is provided with two or more first mounting holes.

[0025] The first connector 3 is disposed on the side of the first insulating member 2 away from the metal cover plate 1. The electrical connection part 11 or the first connector 3 passes through the first mounting hole, and the electrical connection part 11 is connected to the first connector 3.

[0026] Furthermore, the electrical connection part 11 is integrally formed with the metal cover plate 1. This eliminates the need for separate electrical connection components, reducing welding steps and improving product yield.

[0027] Furthermore, referring to Figure 2 The metal cover plate 1 is recessed towards the first insulating member 2 to form an electrical connection portion 11. The electrical connection portion 11 or the first connecting member 3 passes through the first mounting hole, and the electrical connection portion 11 is connected to the first connecting member 3. The electrical connection portion 11 is formed by the recess of the metal cover plate 1 body, which is convenient to manufacture and also saves materials.

[0028] Optionally, the metal cover plate 1 can also be a planar structure. The first connector 3 is provided with a protrusion (not shown in the figure) protruding towards the metal cover plate 1. The first connector 3 passes through the first mounting hole, so that the electrical connection part 11 is connected to the first connector 3.

[0029] It should be noted that in this embodiment, the metal cover plate 1 includes two or more electrical connection parts 11. The electrical connection parts 11 are electrically connected to the first connector 3, so that two or more battery cells can be integrated into one battery casing. The battery pack assembly 100 is used to seal the battery casing. The metal cover plate 1 can simultaneously serve as the positive or negative electrode of two or more battery cells. The battery pack assembly 100 becomes an integrated battery pack assembly. Figure 1The metal cover plate 1 is shown only as an example with four electrical connection parts 11, and is not intended to be a limitation on the number.

[0030] When the metal cover plate 1 is made of aluminum, it serves as the positive electrode for two or more battery cells simultaneously. The metal cover plate 1 is directly electrically connected to the first connector 3. This eliminates the need for components such as the positive terminal post, the insulating seal at the positive terminal, and the external busbar in the battery pack assembly 100, reducing assembly steps, improving assembly efficiency, and lowering manufacturing costs. Eliminating the positive terminal post and other structures in the battery pack assembly 100 reduces its thickness and overall weight; it also avoids defects such as air leakage caused by welding (or riveting followed by welding) the positive terminal post, improving battery safety and reliability. Similarly, when the metal cover plate 1 is made of copper, it serves as the negative electrode for two or more battery cells simultaneously.

[0031] It is understood that the integrated battery pack assembly process in this embodiment is simplified, reducing the need for separate welding processes for multiple battery pack assemblies 100, thus reducing manufacturing steps and improving the yield of finished products. When the integrated battery pack assembly is assembled with the battery casing, the internal space utilization of the battery casing is higher, increasing battery capacity and energy density. The battery pack assembly 100 in this embodiment can be used for power batteries, energy storage batteries, electronic device batteries, etc., and the electronic devices include computers, communication and consumer electronics products.

[0032] The method for preparing the battery pack assembly 100 in this embodiment includes:

[0033] 1) Provide a metal cover plate 1.

[0034] 2) Stamp the metal cover plate 1 to obtain two or more electrical connection parts 11.

[0035] 3) Provide a first insulating component 2 and a first connecting component 3, wherein the first insulating component 2 is provided with two or more first mounting holes.

[0036] 4) The metal cover plate 1, the first insulating component 2, and the first connecting component 3 are stacked in sequence, and the electrical connection part 11 or the first connecting component 3 passes through the first mounting hole.

[0037] 5) Weld the first connector 3 to the electrical connection part 11 to obtain the battery pack assembly 100.

[0038] In this embodiment, the battery pack assembly 100 eliminates the terminal post, insulating seal and external busbar at the first connector 3. The first connector 3 is directly electrically connected to the metal cover plate 1, which reduces the preparation steps of the battery pack assembly 100, improves assembly efficiency and reduces manufacturing costs.

[0039] In some alternative embodiments, refer to Figure 3 , Figure 4The battery pack assembly 100 also includes an electrode block 4, a second insulator 5, and a second connector 6.

[0040] The electrode block 4 is disposed on the outer surface of the metal cover plate 1; the metal cover plate 1 is provided with a plurality of second mounting holes, the second mounting holes are disposed adjacent to the electrical connection part 11, and the electrode block 4 extends into the second mounting holes.

[0041] The second insulating element 5 is disposed between the electrode block 4 and the metal cover plate 1.

[0042] The second connector 6 is located on the side of the first insulating member 2 away from the metal cover plate 1; the first insulating member 2 is provided with a plurality of third mounting holes, and the second connector 6 is connected to the pole block 4.

[0043] Furthermore, the second insulating member 5 includes a first protruding end 51, which is located inside the second mounting hole and is connected to the inner wall of the second mounting hole.

[0044] The first insulating member 2 includes a second protruding end 21, which is located inside the second mounting hole and is connected to the inner wall of the second mounting hole; the second protruding end 21 is connected to the first protruding end 51.

[0045] In this embodiment, the electrode block 4, the metal cover plate 1, the second connector 6, and the second insulating component 5 are formed separately. The electrode block 4 is assembled onto the metal cover plate 1 through the second insulating component 5. The electrode block 4 and the metal cover plate 1 are bonded together through the second insulating component 5. Then, the first insulating component 2 is installed. After the first insulating component 2 is assembled, the second protruding end 21 is connected to the first protruding end 51, which can act as a sealing ring. At the same time, the first insulating component 2 can fix the second connector 6 to the metal cover plate 1, which facilitates the welding of the second connector 6 to the electrode block 4 and is beneficial for conductivity.

[0046] In some optional embodiments, when the metal cover plate 1 is used as the positive electrode, the metal cover plate 1 is an aluminum metal cover plate, and the first connector 3 is an aluminum connecting piece. The electrode block 4 is the negative electrode, and the second connector 6 is a copper connecting piece. The electrode block 4 can be a copper electrode block or a copper-aluminum composite electrode block. Preferably, the electrode block 4 is a copper-aluminum composite electrode block, with the side of the electrode block 4 closer to the second connector 6 being copper and the side away from the second connector 6 being aluminum, ensuring a good electrical connection between the electrode block 4 and the second connector 6 while saving costs.

[0047] Similarly, when the metal cover 1 is used as the negative electrode, the metal cover 1 is a copper metal cover, and the first connector 3 is a copper connector. The electrode block 4 is the positive electrode, and the second connector 6 is an aluminum connector. The electrode block 4 can be an aluminum electrode block, or it can be a copper-aluminum composite electrode block. The side of the electrode block 4 closest to the second connector 6 is aluminum, and the side away from the second connector 6 is copper.

[0048] In some alternative embodiments, the second insulating element 5 and / or the first insulating element 2 are polypropylene insulating elements.

[0049] In this embodiment, the materials of the second insulating component 5 and / or the first insulating component 2 can be polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), polyamide (PA), or polyphenylene sulfide (PPS). Preferably, the second insulating component 5 and / or the first insulating component 2 are polypropylene insulating components. Polypropylene insulating components provide insulation while also bonding similar or dissimilar metals, reducing the space utilization of the battery cell and thus increasing the cell capacity and energy density. Polypropylene material can significantly increase the contact area, improve the stability of the electrical connection, and reduce the overall thickness and weight of the battery pack assembly 100. The polypropylene insulating component, combined with the electrode block 4 and the metal cover plate 1, reduces the assembly cost of the metal cover plate 1 and the electrode block 4 and improves the stability between the metal cover plate 1 and the electrode block 4.

[0050] In some alternative embodiments, refer to Figure 5 , Figure 6 The battery pack assembly 100 also includes a seal 7, which is placed between the electrode block 4 and the metal cover plate 1. In this embodiment, the seal 7 is added to prevent the cover plate from being electrically connected to the electrode block 4 or the negative electrode connecting piece, and the sealing effect is better.

[0051] Optionally, the seal 7 can be an L-shaped sealing ring, located on the metal cover plate 1, with the electrode block 4 engaging with the metal cover plate 1 to press the seal 7. Alternatively, the seal 7 can be located below the metal cover plate 1, with the negative electrode connecting piece engaging with the metal cover plate 1 to press the seal 7. The seal 7 can also be an O-ring, located on the inner wall of the second mounting hole of the metal cover plate 1, with the electrode block 4 engaging with the metal cover plate 1 to press the seal 7, achieving a seal through compression.

[0052] Reference Figure 7 This utility model embodiment also provides a battery, including any of the battery pack components 100 in the above embodiments.

[0053] Furthermore, the battery also includes a battery casing 200 and battery cells (not shown in the figure). The battery casing 200 and the battery pack assembly 100 enclose a closed space. Two or more battery cells are disposed in the closed space inside the battery casing 200. A partition is provided between two adjacent battery cells. The battery pack assembly 100 is used to close the battery casing 200.

[0054] The battery pack assembly 100 includes a metal cover plate 1, two or more first connectors 3 and two or more second connectors 6. Each battery cell is electrically connected to one first connector 3 and one second connector 6 respectively. The metal cover plate 1 also serves as the positive electrode of all battery cells and is electrically connected to the first connector 3.

[0055] It should be noted that the battery casing 200 includes a casing with two open ends and a base plate. The battery assembly steps include: first, installing the base plate into the bottom of the casing with two open ends, then assembling the individual cells into the casing, while multiple cells are separated and fixed with partitions, welding the individual cells to the first connector 3 and the second connector 6 respectively through the tabs, then welding the casing to the battery pack assembly, and finally injecting electrolyte. Figure 7 The battery shown is only one battery pack assembly 100 as an example and is not a limitation on the number. The battery may also include multiple battery pack assemblies 100.

[0056] Understandably, multiple individual battery cells are integrated into a single battery casing 200, forming an integrated battery. This eliminates the need for separate assembly of multiple components in the battery pack assembly 100, and also eliminates the terminals. The metal cover 1 is a single, integrated structure. An explosion-proof valve is installed on the battery casing 200; for example, an explosion-proof plate is installed on each side of the battery casing 200. The metal cover 1 serves as the positive electrode and can be directly welded to the casing for encapsulation, or it can be sealed and fixed using a plastic insulating component with rolled edges. In other words, the battery casing 200 and the metal cover 1 can be connected in either conductive or insulating ways.

[0057] The integrated battery eliminates the busbars between existing battery modules and battery packs. The positive or negative electrode of the battery cell is integrated into a single metal cover 1, reducing the assembly steps of the battery pack assembly 100, improving assembly efficiency, reducing manufacturing costs, and increasing the yield of finished products. When the integrated top cover is assembled with the battery casing 200, the internal space utilization of the battery casing 200 is higher, increasing battery capacity and energy density.

[0058] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A battery pack assembly, characterized in that, include: A metal cover plate, the metal cover plate including two or more electrical connection parts, each of the electrical connection parts being spaced apart, and the electrical connection parts being electrically connected to the metal cover plate; A first insulating element is connected to the inner surface of the metal cover plate, and the first insulating element is provided with two or more first mounting holes; A first connector is disposed on the side of the first insulating member opposite to the metal cover plate. The electrical connection portion or the first connector passes through the first mounting hole, and the electrical connection portion is connected to the first connector.

2. The battery pack assembly according to claim 1, characterized in that, The electrical connection portion is integrally formed with the metal cover plate.

3. The battery pack assembly according to claim 2, characterized in that, The metal cover plate is recessed towards the first insulating element to form the electrical connection portion.

4. The battery pack assembly according to claim 1, characterized in that, Also includes: An electrode block is disposed on the outer surface of the metal cover plate; the metal cover plate is provided with a plurality of second mounting holes, the second mounting holes being disposed adjacent to the electrical connection portion, and the electrode block extending into the second mounting holes; A second insulating element is disposed between the electrode block and the metal cover plate; The second connector is disposed on the side of the first insulating member away from the metal cover plate; the first insulating member is provided with a plurality of third mounting holes, and the second connector is connected to the electrode block.

5. The battery pack assembly according to claim 4, characterized in that, The second insulating member includes a first protruding end, which is located inside the second mounting hole and is connected to the inner wall of the second mounting hole; The first insulating member includes a second protruding end, which is located inside the second mounting hole and connected to the inner wall of the second mounting hole; the second protruding end is connected to the first protruding end.

6. The battery pack assembly according to claim 4, characterized in that, The battery pack assembly also includes a seal disposed between the metal cover and the electrode blocks.

7. The battery pack assembly according to claim 4, characterized in that, The second insulating element and / or the first insulating element are polypropylene insulating elements.

8. The battery pack assembly according to claim 4, characterized in that, The electrode block is a copper-aluminum composite electrode block.

9. A battery, characterized in that, Includes the battery pack assembly as described in any one of claims 1 to 8.

10. The battery according to claim 9, characterized in that, The battery also includes a battery casing and battery cells; the battery casing and the battery pack assembly enclose a closed space, and two or more battery cells are fixed within the closed space.

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