Battery assembly and electric equipment
By using copper sheets as adapters and installing nickel layer plating on their surfaces, the problem of poor thermal conductivity of nickel sheets is solved, the welding stability and overcurrent capability of lithium-ion batteries are improved, and the production cost and the risk of damage to battery components is reduced. , enhances the stability and durability of the battery assembly.
Patent Information
- Application Number
- CN202420500969.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-14
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-03-14
AI Technical Summary
When the battery cell is connected to the circuit board in lithium-ion batteries, the nickel sheet, as the adapter, has problems such as high cost, poor thermal conductivity and poor overcurrent capability, resulting in narrow soldering windows, easy soldering and overflow of tin on the circuit board, affecting the Battery production safety and quality.
The copper sheet is used as the substrate for the adapter, and a nickel layer is provided on its surface. The welding process window and overcurrent capability are improved through the high thermal conductivity and low resistivity of copper. At the same time, the coating is provided on the surface of the substrate to prevent corrosion. The passivation copper layer is connected to the circuit board to reduce the possibility of disconnection.
It improves the yield and service life of the battery module, reduces the production cost and the possibility of overheating damage, and enhances the working stability and durability of the battery module.
Smart Images
Figure CN222282182U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of battery technology, and in particular relates to a battery assembly and electrical equipment. Background Art
[0002] At present, when the battery cell in the lithium-ion battery is connected to the circuit board, a nickel sheet is often used as a transition piece, that is, the electrode terminal of the battery cell is welded to the nickel sheet to achieve electrical connection, and the nickel sheet is welded to the circuit board to achieve electrical connection, thereby achieving electrical connection between the battery cell and the circuit board.
[0003] Using nickel sheets as adapters has the disadvantages of high cost, poor thermal conductivity and poor current capacity. At the same time, due to the poor thermal conductivity of nickel and high laser absorption rate, it is easy to cause problems such as narrow welding window, easy welding through, and tin overflow on the circuit board patch, which has a negative impact on the safety and quality of battery production. Utility Model Content
[0004] In view of the above situation, the present application provides a battery assembly that can improve the connection quality between the adapter and the circuit board, and improve the connection quality between the adapter and the electrode terminal, thereby improving the yield of the battery assembly.
[0005] An embodiment of the present application provides a battery assembly, including a circuit board, an adapter and a battery cell. The adapter includes a substrate and a first coating, the substrate has a first surface and a second surface facing away from each other, the first surface faces the circuit board and is connected to the circuit board, the substrate is a copper sheet, and the first coating is a nickel layer. The battery cell includes an electrode terminal, the electrode terminal includes a connection area, the connection area is located on the side of the adapter away from the circuit board and is connected to the second surface. The first coating is provided on at least a portion of the surface of the substrate exposed to the electrode terminal and the circuit board.
[0006] In the above-mentioned battery assembly, the material of the base of the adapter is copper. Compared with nickel, copper has the characteristics of strong thermal conductivity, low cost and low resistivity. Based on the strong thermal conductivity of copper, the use of this adapter is conducive to improving the welding process window, that is, making the power range that can be used in the welding process larger, reducing the risk of welding through, thereby improving the yield rate of the battery assembly production process, and at the same time, it is also conducive to improving the heat dissipation efficiency of the circuit board, reducing the possibility of damage to the circuit board due to overheating, thereby improving the working stability of the battery assembly; based on the low cost of copper, the use of this adapter is conducive to reducing the cost of the battery assembly; based on the low resistivity of copper, this adapter has the advantage of strong overcurrent capacity, which is conducive to reducing the possibility of damage to the battery assembly due to overcurrent. In addition, a first coating is provided on at least part of the surface exposed by the substrate, which can protect the exposed substrate to reduce the possibility of corrosion of the substrate, thereby improving the durability of the adapter and further improving the service life of the battery assembly.
[0007] In one embodiment, the thickness of the first coating layer is defined as d1, and d1 satisfies 0.5 μm≤d1≤10 μm.
[0008] In the above embodiment, setting the thickness of the first coating layer to be greater than or equal to 0.5 μm is beneficial to reducing the possibility of corrosion of the substrate due to insufficient thickness of the first coating layer; setting the thickness of the first coating layer to be less than or equal to 10 μm is beneficial to reducing the production cost of the first coating layer and reducing material waste.
[0009] In one embodiment, d1 satisfies 1 μm≤d1≤3 μm.
[0010] In the above embodiment, setting the thickness of the first coating layer to be greater than or equal to 1 μm is beneficial to further reduce the possibility of corrosion of the substrate due to insufficient thickness of the first coating layer; setting the thickness of the first coating layer to be less than or equal to 3 μm is beneficial to further reduce the production cost of the first coating layer and reduce material waste.
[0011] In one embodiment, the thickness of the substrate is defined as d2, and d2 satisfies 0.1 mm≤d2≤0.5 mm.
[0012] In the above embodiment, setting the thickness of the substrate to be greater than or equal to 0.1 mm is beneficial to reducing the possibility of melting through or overcurrent in the adapter, thereby improving the yield and durability of the battery assembly; setting the thickness of the substrate to be less than or equal to 0.5 mm is beneficial to reducing material waste and saving production costs on the one hand, and on the other hand, it is beneficial to reducing the volume occupied by the adapter in the battery assembly, thereby reducing the thickness of the battery assembly.
[0013] In one embodiment, a portion of the second surface exposed from the electrode terminal is provided with the first plating layer.
[0014] In the above embodiment, by providing a first plating layer on the portion of the second surface exposed to the electrode terminal, the second surface can be protected from corrosion, thereby improving the durability of the adapter and further improving the service life of the battery assembly.
[0015] In one embodiment, the first coating layer is disposed on a side surface of the substrate, the side surface is located between the first surface and the second surface, and the side surface connects the first surface and the second surface.
[0016] In the above embodiment, by providing the first coating layer on the side of the substrate, the side can be protected from corrosion, thereby improving the durability of the adapter and further improving the service life of the battery assembly.
[0017] In one embodiment, at least a portion of the first surface is provided with the first plating layer, and the first plating layer provided on the first surface connects the first surface and the circuit board.
[0018] In the above embodiment, the first coating layer can provide corrosion protection to the portion of the first surface covered by it, thereby improving the durability of the adapter and further increasing the service life of the battery assembly.
[0019] In one embodiment, the adapter further includes a second plating layer, which is disposed on the first plating layer located on the first surface, and the second plating layer connects the circuit board and the first plating layer located on the first surface; the second plating layer is a passivated copper layer.
[0020] In the above embodiment, since the connection effect between copper and the circuit board under the surface mounting technology (STM) process is better than the connection effect between nickel and the circuit board, a passivated copper layer is used instead of the first plating layer to connect to the circuit board, which is beneficial to reduce the possibility of disconnection between the adapter and the circuit board and improve the quality of the battery assembly.
[0021] In one embodiment, the thickness of the second coating layer is defined as d3, and d3 satisfies 0.5 μm≤d3≤10 μm.
[0022] In the above embodiment, setting the thickness of the second coating layer to be greater than or equal to 0.5 μm is beneficial to reducing the possibility of the second coating layer melting through in the STM process, so as to ensure as much as possible that the second coating layer forms a connection with the circuit board, thereby reducing the possibility of the adapter being disconnected from the circuit board and improving the quality of the battery assembly; setting the thickness of the second coating layer to be less than or equal to 10 μm is beneficial to reducing the manufacturing cost of the adapter and reducing material waste.
[0023] In one embodiment, d3 satisfies 1 μm≤d3≤3 μm.
[0024] In the above embodiment, setting the thickness of the second coating layer to be greater than or equal to 1 μm is beneficial to further reduce the possibility of corrosion of the substrate due to insufficient thickness of the second coating layer; setting the thickness of the second coating layer to be less than or equal to 3 μm is beneficial to further reduce the production cost of the second coating layer and reduce material waste.
[0025] In one embodiment, the battery assembly includes two adapters, and the two adapters are arranged along the width direction of the battery cell; the electrode terminal includes a first electrode terminal and a second electrode terminal, and the first electrode terminal and the second electrode terminal are arranged along the width direction of the battery cell, and the first electrode terminal and the second electrode terminal both include the connection area, and the connection area on the first electrode terminal is connected to the second surface of one of the adapters, and the connection area on the second electrode terminal is connected to the second surface of another of the adapters.
[0026] In the above embodiment, both electrode terminals of the battery cell are connected to the circuit board through an adapter, which is beneficial to improving the working stability of the battery assembly, reducing the cost of the battery assembly and reducing the possibility of damage to the battery assembly due to overcurrent.
[0027] An embodiment of the present application further provides an electrical device, comprising a battery assembly as described in any of the aforementioned embodiments.
[0028] In the above-mentioned electrical equipment, the battery components used are low-cost and stable in operation, which is beneficial to reducing the production cost of the electrical equipment and improving the working stability of the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 It is a schematic diagram of the structure of a battery assembly in one embodiment of the present application.
[0030] Figure 2 It is a schematic diagram of the structural decomposition of a battery assembly in one embodiment of the present application.
[0031] Figure 3 It is a schematic diagram of the structural decomposition of a battery cell in an embodiment of the present application.
[0032] Figure 4 It is a schematic diagram of the structure when the adapter is not connected to the electrode terminal in an embodiment of the present application.
[0033] Figure 5 It is a schematic diagram of the connection structure between the adapter and the electrode terminal in one embodiment of the present application.
[0034] Figure 6 It is a schematic diagram of the structure when the adapter is not connected to the electrode terminal in an embodiment of the present application.
[0035] Figure 7 It is a schematic diagram of the structure of a battery assembly in one embodiment of the present application.
[0036] Figure 8 It is a schematic diagram of the structure of an electrical device in an embodiment of the present application.
[0037] Reference numerals
[0038] Electrical equipment 1000
[0039] Battery assembly 100
[0040] Circuit board 10
[0041] Substrate 11
[0042] Electronic components 12
[0043] Adapter 20
[0044] Base 21
[0045] First surface 211
[0046] Second surface 212
[0047] Welding Zone 2121
[0048] Side 213
[0049] First plating layer 22
[0050] Second plating layer 23
[0051] Battery Cell 30
[0052] Electrode terminal 31
[0053] First electrode terminal 311
[0054] Second electrode terminal 312
[0055] Connecting area 313
[0056] Battery shell 32
[0057] First housing 321
[0058] Second housing 322
[0059] Accommodation space 323
[0060] Electrode assembly 33
[0061] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION
[0062] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.
[0063] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a centrally arranged element at the same time. When an element is considered to be "set" on another element, it can be directly set on the other element or there may be a centrally arranged element at the same time. In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0065] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.
[0066] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. The various embodiments in the present application may be combined with each other in the absence of conflict.
[0067] It should be noted that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation to the present application.
[0068] In the prior art, when the cells in lithium-ion batteries are connected to the circuit board, nickel sheets are usually used as adapters. However, nickel sheets as adapters have the disadvantages of high cost, poor thermal conductivity and poor current capacity, which easily lead to problems such as narrow welding window, easy welding through and tin overflow on the circuit board patch.
[0069] In view of this, an embodiment of the present application provides a battery assembly, including a circuit board, an adapter and a battery cell. The adapter includes a substrate and a first coating, the substrate has a first surface and a second surface that are opposite to each other, the first surface faces the circuit board and is connected to the circuit board, the substrate is a copper sheet, and the first coating is a nickel layer. The battery cell includes an electrode terminal, the electrode terminal includes a connection area, the connection area is located on the side of the adapter away from the circuit board and is connected to the second surface. The first coating is provided on at least part of the surface of the substrate exposed to the electrode terminal and the circuit board.
[0070] In the above-mentioned battery assembly, the material of the base of the adapter is copper. Compared with nickel, copper has the characteristics of strong thermal conductivity, low cost and low resistivity. Based on the strong thermal conductivity of copper, the use of this adapter is conducive to improving the welding process window, that is, making the power range that can be used in the welding process larger, reducing the risk of welding through, thereby improving the yield rate of the battery assembly production process, and at the same time, it is also conducive to improving the heat dissipation efficiency of the circuit board, reducing the possibility of damage to the circuit board due to overheating, thereby improving the working stability of the battery assembly; based on the low cost of copper, the use of this adapter is conducive to reducing the cost of the battery assembly; based on the low resistivity of copper, this adapter has the advantage of strong overcurrent capacity, which is conducive to reducing the possibility of damage to the battery assembly due to overcurrent. In addition, a first coating is provided on at least part of the surface exposed by the substrate, which can protect the exposed substrate to reduce the possibility of corrosion of the substrate, thereby improving the durability of the adapter and further improving the service life of the battery assembly.
[0071] The embodiments of the present application are further described below in conjunction with the accompanying drawings.
[0072] The embodiment of the present application provides a battery assembly 100, such as Figure 1 and Figure 2 As shown, the battery assembly 100 includes a circuit board 10 , a transition piece 20 and a battery cell 30 .
[0073] In one embodiment, if Figure 1 As shown, the circuit board 10 includes a substrate 11 and electronic components 12 disposed on the substrate 11 .
[0074] In one embodiment, if Figure 2 and Figure 3 As shown, the battery cell 30 includes an electrode terminal 31 , a battery cell shell 32 and an electrode assembly 33 . The electrode assembly 33 is disposed in the battery cell shell 32 . The electrode terminal 31 is connected to the electrode assembly 33 and is exposed from the battery cell shell 32 .
[0075] In one embodiment, if Figure 1 and Figure 3 As shown, the electrode terminal 31 includes a connection area 313 , and the connection area 313 is used to connect with the adapter 20 .
[0076] In one embodiment, if Figure 3 As shown, the battery cell shell 32 includes a first shell 321 and a second shell 322 connected to the first shell 321 . The first shell 321 can be folded and connected with the second shell 322 to jointly form an accommodating space 323 for accommodating the electrode assembly 33 .
[0077] In one embodiment, the electrode assembly 33 includes a positive electrode sheet, a negative electrode sheet, and a separator disposed between the positive electrode sheet and the negative electrode sheet.
[0078] In one embodiment, the positive electrode sheet, the separator and the negative electrode sheet are stacked and then wound to form a wound structure.
[0079] In one embodiment, a plurality of positive electrode sheets, a plurality of separators and a plurality of negative electrode sheets are stacked to form a stacked structure.
[0080] In one embodiment, the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer disposed on the positive electrode current collector, and the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer disposed on the negative electrode current collector.
[0081] In one embodiment, both the positive electrode current collector and the negative electrode current collector are metal layers. As an illustrative example, the positive electrode current collector may be a metal layer including at least one of aluminum, nickel, tantalum, and titanium, such as aluminum foil. The negative electrode current collector may be a metal layer including at least one of copper, nickel, tantalum, and titanium, such as copper foil.
[0082] In one embodiment, the positive electrode active material layer includes a positive electrode active material, and as an exemplary example, the positive electrode active material includes at least one of lithium cobalt oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, lithium iron phosphate, lithium manganese iron phosphate, or lithium manganese oxide. The negative electrode active material layer includes a negative electrode active material, and as an exemplary example, the negative electrode active material includes at least one of graphite, hard carbon, soft carbon, silicon, silicon-oxygen material, and silicon-carbon material.
[0083] In one embodiment, the isolation film is an insulating film material such as a polyethylene film, a polypropylene film, a polyester film or a polyimide film, so as to isolate the positive electrode sheet from the negative electrode sheet.
[0084] In one embodiment, if Figure 1 and Figure 4 As shown, the adapter 20 includes a base 21 made of copper, the base 21 has a first surface 211 and a second surface 212 that are opposite to each other, the first surface 211 is connected to the circuit board 10, and the second surface 212 is connected to the connection area 313 of the electrode terminal 31; the adapter 20 also includes a first plating layer 22, the first plating layer 22 is a nickel layer, and the first plating layer 22 is arranged on at least a portion of the surface of the base 21 exposed to the circuit board 10 and the electrode terminal 31.
[0085] The material of the base 21 of the adapter 20 is copper. Compared with nickel, copper has the characteristics of strong thermal conductivity, low cost and low resistivity. Based on the strong thermal conductivity of copper, the use of this adapter 20 is conducive to improving the welding process window, that is, the power range that can be used in the welding process is larger, and the risk of welding penetration is reduced, thereby improving the yield rate of the production process of the battery assembly 100. At the same time, it is also conducive to improving the heat dissipation efficiency of the circuit board 10, reducing the possibility of damage to the circuit board 10 due to overheating, thereby improving the working stability of the battery assembly 100; based on the low cost of copper, the use of this adapter 20 is conducive to reducing the cost of the battery assembly 100; based on the low resistivity of copper, this adapter 20 has the advantage of strong overcurrent capacity, which is conducive to reducing the possibility of damage to the battery assembly 100 due to overcurrent. In addition, the first plating layer 22 is provided on at least part of the surface exposed by the base 21, which can protect the exposed base 21 to reduce the possibility of corrosion of the base 21, thereby improving the durability of the adapter 20, and then improving the service life of the battery assembly 100.
[0086] In one embodiment, if Figure 4 As shown, the thickness of the first coating 22 is defined as d1, and d1 satisfies 0.5μm≤d1≤10μm. Setting the thickness of the first coating 22 to be greater than or equal to 0.5μm is conducive to reducing the possibility of corrosion of the substrate 21 due to insufficient thickness of the first coating 22; setting the thickness of the first coating 22 to be less than or equal to 10μm is conducive to reducing the production cost of the first coating 22 and reducing material waste.
[0087] In some embodiments, d1 is set to one of 0.5 μm, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, and 10 μm.
[0088] In one embodiment, d1 satisfies 1μm≤d1≤3μm. Setting the thickness of the first coating layer 22 to be greater than or equal to 1μm is conducive to further reducing the possibility of corrosion of the substrate 21 due to insufficient thickness of the first coating layer 22; setting the thickness of the first coating layer 22 to be less than or equal to 3μm is conducive to further reducing the production cost of the first coating layer 22 and reducing material waste.
[0089] In one embodiment, if Figure 4 As shown, the thickness of the substrate 21 is defined as d2, and d2 satisfies 0.1mm≤d2≤0.5mm. Setting the thickness of the substrate 21 to be greater than or equal to 0.1mm is conducive to reducing the possibility of melting through or overcurrent in the adapter 20, thereby improving the yield and durability of the battery assembly 100; setting the thickness of the substrate 21 to be less than or equal to 0.5mm is conducive to reducing material waste and saving production costs on the one hand, and on the other hand, it is conducive to reducing the volume occupied by the adapter 20 in the battery assembly 100, thereby reducing the thickness of the battery assembly 100.
[0090] In some embodiments, d2 is set to one of 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm and 0.5 mm.
[0091] In one embodiment, if Figure 4 As shown, the first coating 22 is provided on the portion of the second surface 212 exposed from the electrode terminal 31. By providing the first coating 22 on the portion of the second surface 212 exposed from the electrode terminal 31, the second surface 212 can be protected from corrosion, thereby improving the durability of the adapter 20, and further improving the service life of the battery assembly 100.
[0092] In one embodiment, if Figure 4 As shown, the second surface 212 includes a welding area 2121, and the welding area 2121 is used to connect with the electrode terminal 31. Before the adapter 20 is not connected with the electrode terminal 31, the welding area 2121 is provided with a first plating layer 22. Figure 5 As shown, during the laser welding of the adapter 20 and the electrode terminal 31, the first coating 22 at the welding area 2121 is melted by laser heating, and the heat is conducted to the substrate 21, thereby causing the substrate 21 to partially melt at the welding area 2121, so that the substrate 21 can form a connection with the first coating 22 and the electrode terminal 31.
[0093] In one embodiment, if Figure 4 As shown, the side surface 213 of the substrate 21 is provided with a first coating 22, the side surface 213 is located between the first surface 211 and the second surface 212, and the side surface 213 connects the first surface 211 and the second surface 212. By providing the first coating 22 on the side surface 213 of the substrate 21, the side surface 213 can be protected from corrosion, thereby improving the durability of the adapter 20, and further improving the service life of the battery assembly 100.
[0094] In one embodiment, if Figure 1 and Figure 4 As shown, at least part of the surface of the first surface 211 is provided with a first coating 22, and the first coating 22 provided on the first surface 211 connects the first surface 211 and the circuit board 10. In this way, the first coating 22 can provide corrosion protection to the portion of the first surface 211 covered by it, thereby improving the durability of the adapter 20, and further improving the service life of the battery assembly 100.
[0095] In one embodiment, if Figure 1 and Figure 6As shown, the adapter 20 also includes a second coating 23, the second coating 23 is disposed on the first coating 22 located on the first surface 211, the second coating 23 connects the circuit board 10 and the first coating 22 located on the first surface 211, and the second coating 23 is a passivated copper layer. The passivated copper layer refers to a layered structure obtained after the metallic copper is passivated. Since the connection effect between copper and the circuit board 10 under the surface mounting technology (STM) process is better than the connection effect between nickel and the circuit board 10, the use of the passivated copper layer instead of the first coating 22 to connect with the circuit board 10 is conducive to reducing the possibility of the adapter 20 being disconnected from the circuit board 10 and improving the quality of the battery assembly 100.
[0096] In one embodiment, if Figure 6 As shown, the thickness of the second coating 23 is defined as d3, and d3 satisfies 0.5μm≤d3≤10μm. Setting the thickness of the second coating 23 to be greater than or equal to 1μm is conducive to reducing the possibility of the second coating 23 being melted through during the STM process, so as to ensure that the second coating 23 is connected to the circuit board 10 as much as possible, thereby reducing the possibility of the adapter 20 being disconnected from the circuit board 10 and improving the quality of the battery assembly 100; setting the thickness of the second coating 23 to be less than or equal to 10μm is conducive to reducing the manufacturing cost of the adapter 20 and reducing material waste.
[0097] In some embodiments, d3 is set to one of 0.5 μm, 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm and 10 μm.
[0098] In one embodiment, d3 satisfies 1μm≤d3≤3μm. Setting the thickness of the second coating 23 to be greater than or equal to 1μm is conducive to further reducing the possibility of the second coating 23 being melted through during the STM process, so as to ensure that the second coating 23 is connected to the circuit board 10 as much as possible, thereby reducing the possibility of the adapter 20 being disconnected from the circuit board 10 and improving the quality of the battery assembly 100; setting the thickness of the second coating 23 to be less than or equal to 3μm is conducive to further reducing the production cost of the first coating 22 and reducing material waste.
[0099] In one embodiment, if Figure 1 and Figure 3As shown, the battery assembly 100 includes two adapters 20, which are arranged along the width direction of the battery cell 30; the electrode terminal 31 includes a first electrode terminal 311 and a second electrode terminal 312, which are arranged along the width direction of the battery cell 30, and the first electrode terminal 311 and the second electrode terminal 312 both include a connection area 313, the connection area 313 on the first electrode terminal 311 is connected to the second surface 212 of one adapter 20, and the connection area 313 on the second electrode terminal 312 is connected to the second surface 212 of the other adapter 20. In this way, the two electrode terminals 31 of the battery cell 30 are connected to the circuit board 10 through the adapter 20, which is conducive to improving the working stability of the battery assembly 100, reducing the cost of the battery assembly 100, and reducing the possibility of damage to the battery assembly 100 due to overcurrent.
[0100] In one embodiment, if Figure 7 As shown, the battery assembly 100 includes a plurality of battery cells 30 and a plurality of adapters 31, and the plurality of battery cells 30 are connected to the same circuit board 10 through a plurality of adapters 20. Specifically, any electrode terminal 31 of each battery cell 30 is connected to the circuit board 10 through an adapter 20. By arranging a plurality of battery cells 30 in the battery assembly 100, it is beneficial to improve the energy density of the battery assembly 100, so that the battery assembly 100 can store or release more electricity.
[0101] The embodiment of the present application also provides an electric device 1000, such as Figure 8 As shown, the electric device 1000 includes the battery assembly 100 involved in any of the aforementioned embodiments.
[0102] In one embodiment, the electric device 1000 is a mobile phone, a tablet computer, and a notebook computer. In the above electric devices, the battery components used are low-cost and stable in operation, which is conducive to reducing the production cost of the electric device and improving the stability of the operation of the electric device.
[0103] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the disclosure scope of the present application.
Claims
1. A battery assembly, characterized in that: include: Circuit boards; The adapter comprises a base and a first coating, wherein the base has a first surface and a second surface facing away from each other, and the first surface faces the circuit board and is connected to the circuit board; A battery cell, comprising an electrode terminal, wherein the electrode terminal comprises a connection area, the connection area is located on a side of the adapter away from the circuit board and connected to the second surface; At least a portion of the surface of the adapter exposed is provided with the first coating; The substrate is a copper sheet, and the first plating layer is a nickel layer.
2. The battery assembly according to claim 1, characterized in that The thickness of the first coating layer is d1, and d1 satisfies 0.5 μm≤d1≤10 μm.
3. The battery assembly according to claim 2, characterized in that: d 1 satisfies 1 μm ≤ d 1 ≤ 3 μm.
4. The battery assembly according to claim 1, wherein: The thickness of the substrate is d2, and d2 satisfies 0.1 mm≤d2≤0.5 mm.
5. The battery assembly according to claim 1, characterized in that: The first plating layer is disposed on a portion of the second surface exposed from the electrode terminal.
6. The battery assembly according to claim 1, wherein: The first plating layer is disposed on a side surface of the substrate, the side surface is located between the first surface and the second surface, and the side surface connects the first surface and the second surface.
7. The battery assembly according to claim 1, characterized in that: The first plating layer is disposed on at least a portion of the first surface, and the first plating layer disposed on the first surface connects the first surface and the circuit board.
8. The battery assembly according to claim 7, characterized in that: The adapter also includes a second plating layer, the second plating layer is disposed on the first plating layer located on the first surface, and the second plating layer connects the circuit board and the first plating layer located on the first surface; The second plating layer is a passivated copper layer.
9. The battery assembly according to claim 8, characterized in that: The thickness of the second coating layer is d3, and d3 satisfies 0.5 μm≤d3≤10 μm.
10. The battery assembly according to claim 9, characterized in that The thickness of the second coating layer is defined as d3, and d3 satisfies 1 μm≤d3≤3 μm.
11. The battery assembly according to claim 1, characterized in that: The battery assembly comprises two adapters, and the two adapters are arranged along the width direction of the battery core; The electrode terminal includes a first electrode terminal and a second electrode terminal, the first electrode terminal and the second electrode terminal are arranged along the width direction of the battery cell, the first electrode terminal and the second electrode terminal both include the connection area, the connection area on the first electrode terminal is connected to the second surface of one of the adapters, and the connection area on the second electrode terminal is connected to the second surface of another of the adapters.
12. An electrical equipment, characterized in that: Comprising a battery assembly as claimed in any one of claims 1 to 11.