Battery pack for improving electric connection performance and electric equipment

Abstract

The invention provides a battery pack for improving electric connection performance, the battery pack is used for supplying power to electric equipment, the battery pack comprises a shell, a battery core assembly, a circuit board and a terminal seat, the battery core assembly is electrically connected to the circuit board, the terminal seat comprises an insulator and a plurality of conductive terminals held on the insulator, each conductive terminal comprises a connecting part and a contact part, and the connecting parts are electrically connected with the circuit board. The connecting part is electrically connected to the circuit board, and the contact part is exposed from the shell and is configured to be electrically connected with a butt joint terminal of electric equipment; the insulator comprises a bottom wall, a side wall connected with the bottom wall and partition walls, the insulator is provided with a plurality of accommodating spaces for accommodating the contact parts, the accommodating spaces are formed between the side wall and the partition walls or between two adjacent partition walls, and the accommodating spaces are arranged along a first direction; the partition wall comprises an elastic cantilever, the contact parts of the adjacent conductive terminals are separated by the cantilever, and when the conductive terminals are in butt joint with the butt joint terminals, the contact parts are extruded by the butt joint terminals to force the cantilever to elastically deform so as to extrude the contact parts of the adjacent conductive terminals.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery pack and electrical equipment with improved electrical connection performance. Background Art

[0002] The rapid development of lithium batteries has brought about tremendous changes in industries such as electric vehicles, power tools, and home appliances. Lithium battery cells are assembled into battery packs to power these electrical devices. The battery packs can be designed with a detachable connection to the main body of the electrical device, allowing the battery packs to power multiple different electrical devices. However, at the same time, the detachable electrical connection structure also brings the hidden danger of poor electrical connection stability, especially for some electrical devices that contain motors and are prone to vibration, such as power tools and outdoor power equipment (OPE equipment), which are more prone to the possibility of electrical connection failure. Summary of the Invention

[0003] The present application provides a battery pack and electrical equipment with improved electrical connection performance.

[0004] The present application provides a battery pack with improved electrical connection performance, which is used to power an electrical device, wherein the electrical device includes a docking terminal, the battery pack includes a shell, a battery cell assembly, a circuit board and a terminal block, the battery cell assembly is electrically connected to the circuit board, the terminal block includes an insulator and a plurality of conductive terminals held on the insulator, the conductive terminal includes a connecting portion and a contact portion, the connecting portion is electrically connected to the circuit board, the contact portion is exposed from the shell and is configured to form an electrical connection with the docking terminal of the electrical device; the insulator includes a bottom wall, a side wall connected to the bottom wall and a partition wall, the insulator is provided with a plurality of accommodating spaces for accommodating the contact portion, the accommodating spaces are formed between the side wall and the partition wall or between two adjacent partition walls, and the plurality of accommodating spaces are arranged along a first direction; the partition wall includes an elastic cantilever, the cantilever separates the contact portions of adjacent conductive terminals, and when the conductive terminal is docked with the docking terminal, the contact portion is squeezed by the docking terminal, forcing the cantilever to undergo elastic deformation, thereby squeezing the contact portion of the adjacent conductive terminal.

[0005] Furthermore, the cantilever includes a first protrusion extending along a first direction, and the contact portion presses against the first protrusion when mating with the mating terminal.

[0006] Furthermore, the cantilever includes a second protrusion extending in a direction opposite to the first direction, and the second protrusion is configured to press against a contact portion of an adjacent conductive terminal.

[0007] Furthermore, the cantilever extends along a second direction, the second direction is perpendicular to the first direction, and the conductive terminal is docked with the docking terminal along the second direction.

[0008] Furthermore, the partition wall also includes a base and a bridging portion, and the base, the bridging portion and the cantilever are connected in sequence in the second direction. The size of the bridging portion in the third direction is smaller than that of the base and the cantilever, so that the cantilever can swing relative to the base; the third direction is perpendicular to the first direction and the second direction.

[0009] Furthermore, the conductive terminal includes a retaining portion connecting the contact portion and the connecting portion, and a retaining space is formed between adjacent bases or between the bases and the side walls. The retaining portion is fixed to the retaining space, and the retaining space is connected to the accommodating space and arranged along the second direction.

[0010] Furthermore, the holding portion is rigid and is partially located in the accommodating space, so that the holding portion and the cantilever at least partially overlap in the first direction.

[0011] Furthermore, the conductive terminal includes a power terminal and a signal terminal, the contact portion of the power terminal partially protrudes from the accommodating space, and the contact portion of the signal terminal is located within the accommodating space. In the second direction, the contact portion of the power terminal protrudes more than the contact portion of the signal terminal.

[0012] Furthermore, in the second direction and the third direction, the cantilever protrudes more than the side wall.

[0013] On the other hand, the present application further provides an electrical device, which includes a load and the battery pack as described above, and the battery pack supplies power to the load.

[0014] When the conductive terminal of the battery pack of the present application is docked with the docking terminal, the cantilever is forced to undergo elastic deformation, the cantilever abuts the contact part of the adjacent conductive terminal, and sequentially squeezes other cantilevers and the contact parts of other conductive terminals, so that the contact part of the conductive terminal, the docking terminal, and the cantilever are tightly fitted under the action of elastic force, making the electrical connection tighter and reducing the possibility of circuit failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the battery pack according to an embodiment of the present application.

[0016] Figure 2 yes Figure 1 The battery pack is shown in an exploded perspective view.

[0017] Figure 3 yes Figure 1 A three-dimensional schematic diagram of the insulator of the battery pack shown.

[0018] Figure 4 yes Figure 1 A three-dimensional schematic diagram of the terminal block of the battery pack shown.

[0019] Figure 5 It is a three-dimensional schematic diagram of the electrical equipment of an embodiment of the present application. DETAILED DESCRIPTION

[0020] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with this application.

[0021] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, technical or scientific terms used in this application should have the same ordinary meaning as those of ordinary skill in the art to which this invention belongs. The terms "first," "second," and similar terms used in this application do not denote any order, quantity, or importance, but are simply used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather denote the presence of at least one. "Multiple" or "several" means two or more. Unless otherwise indicated, terms such as "front," "rear," "lower," and / or "upper" are used for convenience only and are not intended to limit a position or spatial orientation. Terms such as "include" or "comprising" mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," "said," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0022] Please combine Figures 1 to 4 The battery pack 100 of the embodiment of the present application is used to power electrical devices, such as power tools such as electric drills, angle grinders, electric wrenches, and electric hammers; outdoor power equipment such as chainsaws, lawn mowers, and blowers; and small household appliances such as vacuum cleaners, juicers, and food processors. The battery pack 100 is detachably mounted on the main body of the electrical device and configured to power a variety of different electrical devices, forming a so-called battery pack platform.

[0023] The battery pack 100 includes a housing 1, a cell assembly 2, a circuit board 3, and a terminal block 4. The housing comprises an upper shell 11 and a lower shell 12, which enclose a space for accommodating the cell assembly 2, the circuit board 3, and the terminal block 4. The upper shell 11 includes a mating portion 111, which is designed to mate with the main body of an electrical device. The cell assembly 2 is used to provide electrical energy, and the circuit board 3 is used to control the charging and discharging of the battery pack and for battery management.

[0024] The terminal block 4 includes an insulator 41 and a plurality of conductive terminals 42 retained by the insulator 41. The conductive terminals 42 include a connecting portion (not shown), a retaining portion 422, and a contact portion 423. The connecting portion is electrically connected (specifically, by welding, for example) to the circuit board 3. The contact portion 423 is exposed from the housing 1. Specifically, the contact portion 423 is exposed from the terminal slot of the mating portion 111 and is configured to form an electrical connection with a mating terminal of an electrical device. In this example, the contact portion is formed by two arms and is elastic.

[0025] The insulator 41 includes a bottom wall 411, sidewalls 412 extending perpendicularly from the bottom wall, a rear wall 414, and a partition wall 413. The partition wall 413 extends perpendicularly from the rear wall 414 and is parallel to the sidewalls. The insulator 41 is provided with a plurality of accommodating spaces 410 for accommodating the contact portions 423. The accommodating spaces 410 are formed between the sidewalls and the partition wall, or between two adjacent partition walls. The plurality of accommodating spaces 410 are arranged along the first direction X.

[0026] The partition wall 413 includes a base 4131, a bridging portion 4132 and a cantilever 4133. The base 4131, the bridging portion 4132 and the cantilever 4133 are sequentially connected in a second direction Y and extend along the second direction Y. The second direction Y is perpendicular to the first direction X. The conductive terminal 42 is docked with the docking terminal along the second direction Y.

[0027] The cantilever 4133 is elastic and serves to separate the contact portions 423 of adjacent conductive terminals 42. When the conductive terminal 42 is mated with the mating terminal, the contact portion 423A is squeezed and deformed by the mating terminal (the deformation is greater than the distance between the contact portion 423A and the cantilever 4133A), forcing the cantilever 4133A to elastically deform, squeezing the contact portion 423B of the adjacent conductive terminal. This action, in turn, enables the conductive terminal 42 and the mating terminal to form a highly reliable electrical connection through elastic force. This ensures the reliability of the electrical connection even when used on electrical equipment subject to high-frequency vibration. Specifically, the bridging portion 4132 is smaller in the third direction Z than the cantilever 4133 and base 4121, allowing the cantilever 4133 to swing relative to the base 4121 in a direction approximately aligned with the first direction X. The third direction Z is perpendicular to the first direction X and the second direction Y.

[0028] Preferably, the cantilever 4133 includes a first protrusion 4134 extending along a first direction. When the contact portion 423 mates with the mating terminal, it presses against the first protrusion 4134, thereby providing distance compensation. More preferably, the cantilever 4133 also includes a second protrusion (not shown) extending in a direction opposite to the first direction. The second protrusion is configured to press against the contact portion of an adjacent conductive terminal, further providing distance compensation.

[0029] A retaining space 420 is formed between adjacent base portions 4121 or between the base portion 4121 and the sidewall 412. The retaining portion 422 is fixed within the retaining space 420. The retaining space 420 communicates with the accommodating space 410 and is arranged along the second direction Y. The retaining portion 422 is rigid and partially located within the accommodating space 410, such that the retaining portion 422 and the cantilever 4133 at least partially overlap in the first direction X. The rigid retaining portion 422 of the conductive terminal can suppress excessive deformation of the cantilever 4213.

[0030] The conductive terminals 42 include power terminals 42A (located on both sides) and signal terminals 42B (located in the middle). The contact portions 423A of the power terminals 42A partially protrude from the accommodating space 410, while the contact portions 423B of the signal terminals are located within the accommodating space 410. In the second direction, the contact portions 423A of the power terminals protrude further than the contact portions 423B of the signal terminals. In other words, the power terminals 42A first mate with the mating terminals. The contact portions 423A, upon receiving the compressive force from the mating terminals, press against the adjacent cantilever 4133A. The cantilever 4133A, in turn, press against the contact portions 423B. This compresses each contact portion and cantilever, thereby forming a reliable electrical connection.

[0031] Optionally, in the second direction Y and the third direction Z, the cantilever 4133 is more protruding relative to the side wall 412 and can still effectively separate adjacent contact portions after deformation, thereby achieving better electrical insulation.

[0032] The insulator 41 further includes a positioning portion 415 extending from the bottom wall 411 in a direction opposite to the third direction, for positioning the terminal block on the circuit board 3 .

[0033] On the other hand, the present application also provides an electrical device, as mentioned above, the electrical device is an electric tool such as an electric drill, angle grinder, electric wrench, electric hammer, etc., it can also be an outdoor power equipment such as a chain saw, lawn mower, blower, etc., it can also be a small household appliance such as a vacuum cleaner, juicer, food processor, etc., which will not be listed here one by one. Figure 5 The electrical equipment includes an equipment body 200 and the battery pack 100. The equipment body includes a load (not shown), which can be a motor, an electric heating wire, a pump or other components.

[0034] When the conductive terminal of the battery pack of the present application is docked with the docking terminal, the cantilever is forced to undergo elastic deformation, the cantilever abuts the contact part of the adjacent conductive terminal, and sequentially squeezes other cantilevers and the contact parts of other conductive terminals, so that the contact part of the conductive terminal, the docking terminal, and the cantilever are tightly fitted under the action of elastic force, making the electrical connection tighter and reducing the possibility of circuit failure.

[0035] The above description is merely a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with this profession can make slight changes or modifications to equivalent embodiments with equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A battery pack with improved electrical connection performance, used for powering an electrical device, wherein the electrical device includes a docking terminal, the battery pack includes a housing, a battery cell assembly, a circuit board, and a terminal block, wherein the battery cell assembly is electrically connected to the circuit board, characterized in that: The terminal block includes an insulator and a plurality of conductive terminals held in the insulator, the conductive terminals including a connecting portion and a contact portion, the connecting portion being electrically connected to the circuit board, the contact portion being exposed from the housing and configured to form an electrical connection with a docking terminal of an electrical device; The insulator includes a bottom wall, a side wall connected to the bottom wall, and a partition wall. The insulator is provided with a plurality of accommodating spaces for accommodating the contact parts. The accommodating spaces are formed between the side wall and the partition wall or between two adjacent partition walls. The plurality of accommodating spaces are arranged along a first direction. The partition wall includes an elastic cantilever that separates the contact portions of adjacent conductive terminals. When the conductive terminal is docked with the docking terminal, the contact portion forces the cantilever to elastically deform, thereby squeezing the contact portion of the adjacent conductive terminal.

2. The battery pack according to claim 1, wherein: The cantilever includes a first protrusion extending along a first direction, and the contact portion presses against the first protrusion when mating with the mating terminal.

3. The battery pack according to claim 2, wherein: The cantilever includes a second protrusion extending in a direction opposite to the first direction, and the second protrusion is configured to abut against a contact portion of an adjacent conductive terminal.

4. The battery pack according to claim 1, wherein: The cantilever extends along a second direction, which is perpendicular to the first direction. The conductive terminal is connected to the connecting terminal along the second direction.

5. The battery pack according to claim 4, characterized in that: The partition wall further includes a base and a bridge portion, wherein the base, the bridge portion, and the cantilever are sequentially connected in the second direction, and the bridge portion is smaller in size than the base and the cantilever in the third direction, so that the cantilever can swing relative to the base; The third direction is perpendicular to the first direction and the second direction.

6. The battery pack according to claim 5, characterized in that: The conductive terminal includes a retaining portion connecting the contact portion and the connecting portion, a retaining space is formed between adjacent bases or between the base and the side wall, the retaining portion is fixed to the retaining space, and the retaining space is connected to the accommodating space and arranged along the second direction.

7. The battery pack according to claim 6, characterized in that: The holding portion is rigid and partially located in the accommodating space, so that the holding portion and the cantilever at least partially overlap in the first direction.

8. The battery pack according to claim 4, characterized in that: The conductive terminal includes a power terminal and a signal terminal. The contact portion of the power terminal partially protrudes from the accommodating space, and the contact portion of the signal terminal is located in the accommodating space. In the second direction, the contact portion of the power terminal protrudes more than the contact portion of the signal terminal.

9. The battery pack according to claim 5, characterized in that: In the third direction, the cantilever protrudes further relative to the side wall.

10. An electrical device, characterized in that: The electrical equipment includes a load and a battery pack according to any one of claims 1 to 9, and the battery pack supplies power to the load.

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