PCB structure of battery, secondary battery and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a PCB structure of a battery, a secondary battery and electric equipment. The PCB structure of the battery comprises a first limiting component, a second limiting component, a circuit board and an elastic limiting component, the first limiting component is connected to the second limiting component side by side; an opening is formed in the first limiting part; the circuit board is arranged between the first limiting part and the second limiting part; the surface of one side of the circuit board is arranged at the opening; one end of the elastic limiting component is connected to the second limiting component; and the other end of the elastic limiting part is connected to the circuit board. According to the utility model, the distance between the circuit board and the tabs can be made up as much as possible, and the poor contact gap between the tabs and the PCB is made up, so that repeated reworking or scrapping of the cells is avoided; and the compatibility of the PCB structure is improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and in particular relates to a PCB board structure for a battery, a secondary battery, and an electrical device. Background Technology

[0002] Printed circuit boards (PCBs) are the providers of electrical connections for electronic components. Their main advantages are that they greatly reduce wiring and assembly errors, improve automation levels and production efficiency. PCBs make circuits miniaturized and more intuitive, playing an important role in the mass production of fixed circuits and the optimization of electrical appliance layouts; they can also be applied in the field of battery cell assembly.

[0003] However, the thickness of current 3C soft-pack battery cells varies, which means that the same bonding pad cannot be compatible with all cell thicknesses. If a matching bonding pad is not replaced, the fixed shape of the bonding pad and the PCB structure will lead to poor contact between the cell tabs and the gold fingers in the battery's PCB structure. Therefore, it is necessary to develop a PCB structure that can solve the incompatibility between cell thickness and bonding pad. Utility Model Content

[0004] The purpose of this utility model is to provide a PCB board structure for a battery that addresses the shortcomings of existing technologies and solves the technical problem of poor compatibility of existing PCB structures.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A PCB board structure for a battery includes a first limiting component, a second limiting component, a circuit board, and an elastic limiting component; the first limiting component is connected side-by-side to the second limiting component; and the first limiting component has an opening; the circuit board is disposed between the first limiting component and the second limiting component; and one side surface of the circuit board is disposed in the opening; one end of the elastic limiting component is connected to the second limiting component; and the other end of the elastic limiting component is connected to the circuit board.

[0007] Preferably, the elastic limiting component includes an elastic element; one end of the elastic element is connected to the second limiting component; and the other end of the elastic element is connected to the circuit board.

[0008] Preferably, the elastic limiting component further includes a gasket; the other end of the elastic element is connected to the gasket; the gasket abuts against the side surface of the circuit board away from the opening.

[0009] Preferably, the first limiting component is further provided with a limiting cavity; the limiting cavity is connected to the opening; the circuit board is limited and connected inside the limiting cavity.

[0010] Preferably, the cross-sectional area of ​​the limiting cavity is larger than the cross-sectional area of ​​the opening; and the projection of the area where the limiting cavity is located toward the opening covers the opening.

[0011] Preferably, the circuit board includes a stacked circuit body and a limiting bottom; the circuit body is disposed within the opening; and the limiting bottom is limited and connected to the limiting cavity.

[0012] Preferably, the first limiting component includes a first connecting segment, at least two second connecting segments, and at least one third connecting segment; one side end of one of the second connecting segments is obliquely connected to one side end of the first connecting segment; one side end of another second connecting segment is obliquely connected to the other side end of the first connecting segment; one side end of the third connecting segment is obliquely connected to the other side end of one of the second connecting segments or the other side end of another second connecting segment; and the opening is formed between the first connecting segment, the second connecting segment, and the third connecting segment.

[0013] Preferably, the second limiting component includes a support body and a second mounting protrusion connected to the support body; the support body is limitedly connected to the circuit board;

[0014] The first limiting component is provided with a first mounting protrusion; the first mounting protrusion and the second mounting protrusion are detachably connected.

[0015] This utility model also discloses a secondary battery, including the PCB board structure of the battery described above.

[0016] This utility model also discloses an electrical device, including the aforementioned secondary battery.

[0017] The beneficial effects of this utility model are that, by adopting the elastic limiting function of the elastic limiting component, the circuit board can be compressed and squeezed away from the opening for assembly or extended and expanded towards the opening for assembly, so as to adapt to the assembly of battery cell tabs and pressure blocks of more different thicknesses. This can maximize the distance between the circuit board and the tabs, compensate for the gaps caused by poor contact between the tabs and the PCB board, and avoid repeated rework of battery cells or scrapped battery cells; thereby improving the compatibility of the PCB structure and improving processing efficiency. Attached Figure Description

[0018] The following will refer to the appendix. Figures 1-5 This section describes the features, advantages, and technical effects of exemplary embodiments of the present invention.

[0019] Figure 1 This is an exploded view of the PCB board structure of a battery according to an embodiment of the present invention;

[0020] Figure 2This is a front view of the PCB board structure of a battery according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the elastic limiting component of the PCB board structure of a battery according to an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the first limiting component of the PCB board structure of a battery according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the PCB board structure of a battery according to an embodiment of the present invention, showing the separation state of the circuit board and the second limiting component.

[0024] In the figure: 1-First limiting component; 11-Opening; 12-Limiting cavity; 101-First mounting protrusion; 102-First connecting section; 103-Second connecting section; 104-Third connecting section; 105-First mounting hole; 2-Second limiting component; 21-Support body; 22-Second mounting protrusion; 201-Second positioning hole; 202-Second mounting hole; 3-Circuit board; 31-Circuit body; 32-Limiting bottom; 301-First positioning hole; 4-Elastic limiting component; 41-Elastic element; 42-Gasket. Detailed Implementation

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0026] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or multiple situations existing alone. In addition, the character " / " in this document generally indicates that the related objects before and after are in an "or" relationship.

[0029] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0030] The following is in conjunction with the appendix Figures 1-5 The present invention will be described in further detail, but this is not intended to limit the scope of the present invention.

[0031] like Figure 1 and 2 As shown, in one embodiment of this utility model, the PCB board structure of the battery includes a first limiting component 1, a second limiting component 2, a circuit board 3, and an elastic limiting component 4; the first limiting component 1 and the second limiting component 2 are arranged side by side; and the first limiting component 1 is provided with an opening 11; the circuit board 3 is disposed between the first limiting component 1 and the second limiting component 2; and one side surface of the circuit board 3 is provided with the opening 11; one end of the elastic limiting component 4 is connected to the second limiting component 2; and the other end of the elastic limiting component 4 is connected to the circuit board 3, so that the circuit board 3 can move toward or away from the opening 11.

[0032] The technical solution of this utility model, by employing the elastic limiting function of the elastic limiting component, allows the circuit board to be assembled by shrinking and squeezing away from the opening or by extending and expanding towards the opening, so as to adapt to the assembly of battery cell tabs and pressure blocks of more different thicknesses. This can maximize the distance between the circuit board and the tabs, compensate for the gaps caused by poor contact between the tabs and the PCB board, and avoid repeated rework of battery cells or scrapped battery cells; thereby improving the compatibility of the PCB structure and increasing processing efficiency.

[0033] Specifically, in some embodiments, the number of elastic limiting components 4 is at least four, and they are arranged in an array between the circuit board 3 and the second limiting component 2. In some embodiments, the number of elastic limiting components 4 is nine, and they are arranged in a 3x3 array. Further, in some embodiments, the elastic limiting component 4 includes an elastic element 41; one end of the elastic element 41 is connected to the second limiting component 2; the other end of the elastic element 41 is connected to the circuit board 3. This structure is mounted on the second limiting component 2 by the elastic element 41 (which can be a spring), and the circuit board 3 is disposed on the elastic element 41 (which can be a spring), allowing the circuit board to move up and down; thereby solving the problem of poor contact of the battery cell tabs. In other embodiments, such as... Figure 1 and 3 As shown, the elastic limiting component 4 includes an elastic element 41 and a gasket 42; one end of the elastic element 41 is connected to the second limiting component 2; the other end of the elastic element 41 is connected to the gasket 42; the gasket 42 abuts against the surface of the circuit board 3 away from the opening 11. This structure is mounted on the second limiting component 2 by the elastic element 41 (which can be a spring), and the circuit board 3 is pressed and connected to the gasket 42, causing the circuit board to move up and down; thereby solving the problem of poor contact of the battery cell tabs; and reducing direct damage to the circuit board 3 by the spring, extending its service life.

[0034] Specifically, in some implementations, such as Figure 1 , 2 As shown in Figure 4, the first limiting component 1 also includes a limiting cavity 12; the limiting cavity 12 communicates with the opening 11; the circuit board 3 is limitedly connected inside the limiting cavity 12. Wherein, as... Figure 4 As shown, the cross-sectional area of ​​the limiting cavity 12 is larger than that of the opening 11; and the projection of the area where the limiting cavity 12 is located onto the opening 11 covers the opening 11. That is, the limiting cavity 12 and the opening 11 form a T-shaped or L-shaped limiting space to enable the elastic limiting component 4 to be installed on the lower second limiting component 2, and the circuit board 3 to be pressed onto the elastic limiting component 4; at the same time, the lower limiting cavity 12 limits the circuit board 3, so that the circuit board 3 can only move up and down; thereby solving the problem of poor contact of the battery cell tab.

[0035] Specifically, in some implementations, such as Figure 4As shown, the first limiting component 1 includes a first connecting segment 102, at least two second connecting segments 103, and at least one third connecting segment 104; one end of one second connecting segment 103 is obliquely connected to one end of the first connecting segment 102; one end of another second connecting segment 103 is obliquely connected to the other end of the first connecting segment 102; one end of the third connecting segment 104 is obliquely connected to the other end of one or another second connecting segment 103; and the opening 11 is formed between the first connecting segment 102, the second connecting segment 103, and the third connecting segment 104. The upper portion between the first connecting segment 102, the second connecting segment 103, and the third connecting segment 104 forms the opening 11; the lower portion between the first connecting segment 102, the second connecting segment 103, and the third connecting segment 104 forms the limiting cavity 12. In other words, the limiting cavity 12 and the opening 11 form a T-shaped or L-shaped limiting space to enable the elastic limiting component 4 to be installed on the lower second limiting component 2, and the circuit board 3 to be pressed onto the elastic limiting component 4; at the same time, the upper first limiting component 1 limits the circuit board 3 in the front-back and left-right directions, so that the circuit board 3 can only move up and down; thereby solving the problem of poor contact of the battery cell tab.

[0036] Specifically, in some implementations, such as Figure 1 , 2 As shown in Figure 5, the circuit board 3 includes a stacked circuit body 31 and a limiting bottom 32; the circuit body 31 is disposed within the opening 11; the limiting bottom 32 is limited and connected to the limiting cavity 12. In some embodiments, the circuit body 31 and the limiting bottom 32 are integrally fixed. That is, the limiting cavity 12 and the opening 11 form a T-shaped or L-shaped limiting space to allow the elastic limiting component 4 to be installed on the lower second limiting component 2, and the circuit board 3 to be pressed onto the elastic limiting component 4; at the same time, the upper first limiting component 1 limits the circuit board 3 in the front-back and left-right directions, so that the circuit board 3 can only move up and down; thereby solving the problem of poor contact of the battery cell tabs.

[0037] The main body of the circuit 31 mainly consists of pads, vias, mounting holes, wires, components, connectors, fillers, and electrical boundaries. Specifically, connectors are components used for connecting circuit boards; fillers are copper plating used for the ground network, effectively reducing impedance; electrical boundaries define the dimensions of the circuit board, ensuring that no component on the board exceeds these boundaries; pads are metal holes used for soldering component leads; vias can be metal or non-metal, with metal vias used to connect component leads between layers; mounting holes are used to secure the circuit board; and wires are copper films used for connecting component leads in the electrical network.

[0038] Specifically, in some implementations, such as Figure 4 and 5 As shown, the second limiting component 2 includes a support body 21 and a second mounting protrusion 22 connected to the support body 21; the support body 21 is limited and connected to the circuit board 3; the second mounting protrusion 22 is connected to the first limiting component 1. Wherein, as... Figure 4 As shown, the first limiting component 1 is provided with a first mounting protrusion 101; the first mounting protrusion 101 and the second mounting protrusion 22 are detachably connected. Further, the first mounting protrusion 101 is provided with at least one first mounting hole 105; the second mounting protrusion 22 is provided with a second mounting hole 202 corresponding to the first mounting hole 105. That is, the first mounting protrusion 101 is located at the side end of the first connecting section 102; and the first mounting protrusion 101 is respectively fitted with the first mounting hole 105 and the second mounting hole 202 by fixing bolts, thereby achieving a detachable connection between the first mounting protrusion 101 and the second mounting protrusion 22.

[0039] Specifically, in some implementations, such as Figure 5 As shown, the second limiting component 2 is provided with a second positioning hole 201; the circuit board 3 is provided with a first positioning hole 301 corresponding to the second positioning hole 201. The second positioning hole 201 is located on the support body 21; the first positioning hole 301 passes through the limiting bottom 32 and the circuit body 31 in sequence. That is, the positioning pin passes through the second positioning hole 201 and the first positioning hole 301 in sequence, and extends to abut against the first limiting component 1; to achieve the positioning and installation of the circuit board 3, so that the circuit board 3 can only move up and down; thereby solving the problem of poor contact of the battery cell tabs.

[0040] This utility model also proposes a secondary battery, which includes a PCB board structure and a cell body. The electrode structure on the cell body is connected to the circuit board of the PCB board structure of the battery. The specific structure of the PCB board structure of the battery is as described in the above embodiments. Since this secondary battery adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0041] A secondary battery, also known as a rechargeable battery or accumulator, is a battery that can be recharged after discharge to reactivate its active materials and continue to be used. Utilizing the reversibility of chemical reactions, a new battery can be constructed; that is, after a chemical reaction converts into electrical energy, the electrical energy can be used to repair the chemical system, and then the chemical reaction can be converted back into electrical energy. Therefore, it is called a secondary battery (rechargeable battery). The main types of rechargeable batteries on the market include nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid (or lead-acid) batteries, lithium-ion batteries, and polymer lithium-ion batteries. The most common secondary battery is the lead-acid battery, which consists of two sets of alternating grid plates. The positive plate is covered with PbO2, and the negative plate is covered with Pb. The electrolyte is an H2SO4 solution.

[0042] This utility model also proposes an electrical device, which includes a secondary battery. The specific structure of the secondary battery is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0043] The electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose special limitations on the above-mentioned electrical equipment.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0045] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on this utility model are within the protection scope of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A PCB board structure for a battery, characterized in that: The device includes a first limiting component, a second limiting component, a circuit board, and an elastic limiting component; the first limiting component is connected side-by-side to the second limiting component; and the first limiting component has an opening; the circuit board is disposed between the first limiting component and the second limiting component; and the circuit board is disposed in the opening; one end of the elastic limiting component is connected to the second limiting component; and the other end of the elastic limiting component is connected to the circuit board.

2. The PCB board structure of the battery according to claim 1, characterized in that: The elastic limiting component includes an elastic element; one end of the elastic element is connected to the second limiting component; the other end of the elastic element is connected to the circuit board.

3. The PCB board structure of the battery according to claim 2, characterized in that: The elastic limiting component further includes a gasket; the other end of the elastic element is connected to the gasket; the gasket abuts against the side surface of the circuit board away from the opening.

4. The PCB board structure of the battery according to claim 1, characterized in that: The first limiting component is further provided with a limiting cavity; the limiting cavity is in communication with the opening; the circuit board is connected to the inside of the limiting cavity.

5. The PCB board structure of the battery according to claim 4, characterized in that: The cross-sectional area of ​​the limiting cavity is larger than the cross-sectional area of ​​the opening; and the projection of the area where the limiting cavity is located toward the opening covers the opening.

6. The PCB board structure of the battery according to claim 4 or 5, characterized in that: The circuit board includes a stacked circuit body and a limiting bottom; the circuit body is disposed within the opening; the limiting bottom is limited and connected to the limiting cavity.

7. The PCB board structure of the battery according to claim 1, 4, or 5, characterized in that: The first limiting component includes a first connecting segment, at least two second connecting segments, and at least one third connecting segment; one side end of one of the second connecting segments is obliquely connected to one side end of the first connecting segment; one side end of another second connecting segment is obliquely connected to the other side end of the first connecting segment; one side end of the third connecting segment is obliquely connected to the other side end of one of the second connecting segments or the other side end of another second connecting segment; and the opening is formed between the first connecting segment, the second connecting segment, and the third connecting segment.

8. The PCB board structure of the battery according to claim 1, characterized in that: The second limiting component includes a support body and a second mounting protrusion connected to the support body; the support body is limitedly connected to the circuit board; The first limiting component is provided with a first mounting protrusion; the first mounting protrusion and the second mounting protrusion are detachably connected.

9. A secondary battery, characterized in that: The PCB board structure includes the battery as described in any one of claims 1 to 8.

10. An electrical appliance, characterized in that: Includes the secondary battery as described in claim 9.

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