Battery connecting piece, battery assembly and electric device

Abstract

The utility model relates to a battery connecting piece, a battery assembly and an electric device. The battery connector comprises a base material and a thickening layer. The base material is formed by hot-pressing a plurality of layers of thin materials and comprises a welding area and a non-welding area; the thickening layer is attached to the non-welding area in the thickness direction, and a thicker thickening part can be formed. The base layer and the thickening layer are assembled and attached together after being manufactured respectively, so that a hot-pressing structure of the base material formed by hot pressing cannot be damaged. According to the battery connecting piece, the welding requirement and the overcurrent requirement can be met at the same time on the premise that the hot-pressing structure of the base material is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery connector, a battery assembly and an electrical device. Background Art

[0002] During battery use, it is sometimes necessary to use a battery connector to connect multiple batteries to output a higher current and voltage. However, the electrical connection effect of existing battery connectors is poor, resulting in a short battery life. Utility Model Content

[0003] Based on this, it is necessary to provide a battery connector, a battery assembly and an electrical device that improve the above defects in order to solve the problem of poor electrical connection effect of the battery connector in the prior art.

[0004] On the one hand, the present application provides a battery connector, which includes: a base material formed by hot pressing multiple layers of thin materials, the base material including a welding area and a non-welding area; a thickening layer, which is adhered to the non-welding area along the thickness direction to form a thickened portion with a thickness greater than that of the welding area.

[0005] By laminating the thickening layer in the non-welding area along the thickness direction, a thicker thickened portion can be formed. During use, the welding area on the battery connector is welded to the output terminal of the battery. The smaller thickness of the welding area facilitates meeting the welding requirements of the welding equipment, improving the weld connection strength between the battery connector and the battery, and ensuring the connection effect. Secondly, the thickening layer is laminating on the non-welding area, increasing the thickness of the thickened portion, which can both improve the strength of the thickened portion and meet the battery's flow capacity. Furthermore, the thickening layer is laminating in the non-welding area along the thickness direction, that is, the base layer and the thickening layer are manufactured separately and then assembled and laminating together, which will not damage the hot-pressed structure of the substrate formed by hot pressing.

[0006] In some embodiments, the substrate and / or the thickened layer is made of soft aluminum bar.

[0007] In some embodiments, the soft aluminum bar material is formed by hot pressing multiple layers of aluminum foil.

[0008] In some embodiments, the thickened layer is bonded to the non-welding area by laser welding.

[0009] In some embodiments, the welding area includes a first welding area and a second welding area spaced apart along a first direction, and the non-welding area is disposed between the first welding area and the second welding area.

[0010] In some embodiments, the welding area further includes a third welding area spaced apart from the first welding area along a second direction; and / or a fourth welding area spaced apart from the second welding area along a second direction, wherein the second direction is perpendicular to the first direction.

[0011] In some embodiments, a notch is provided at the intersection of the first welding area, the second welding area, the third welding area, and the fourth welding area.

[0012] In some embodiments, a first bending portion extending along the second direction is provided between the first welding area and the second welding area; and / or a second bending portion extending along the first direction is provided between the third welding area and the fourth welding area.

[0013] On the other hand, the present application provides a battery assembly, which includes: the above-mentioned battery connector; and at least two batteries, wherein the battery includes an output pole, and the output pole is connected to the welding area by welding to achieve electrical connection between the batteries.

[0014] On the other hand, the present application provides an electrical device, which includes: the above-mentioned battery assembly, and the battery assembly is used to provide electrical energy to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an axonometric view of a battery connector in an embodiment of the present utility model;

[0016] Figure 2 for Figure 1 A partial enlarged view of position A in the middle;

[0017] Figure 3 This is a schematic diagram of the connection between the battery connector and the battery in an embodiment of the present utility model;

[0018] Figure 4 for Figure 3 A partial enlarged view of position B in the middle;

[0019] Figure 5 This is a schematic structural diagram of a battery assembly in an embodiment of the present utility model;

[0020] Figure 6 for Figure 5 A partial enlarged view of the middle C position;

[0021] Figure 7 It is a structural schematic diagram of the electric device in the embodiment of the utility model.

[0022] Description of reference numerals:

[0023] 1 Battery connector; 11 Base material, 111 Welding area, 1111 First welding area, 1112 Second welding area, 1113 Third welding area, 1114 Fourth welding area, 112 Non-welding area; 12 Thickened layer; 13 Thickened portion; 14 Notch; 15 First bending portion; 16 Second bending portion;

[0024] 2 batteries, 21 output poles;

[0025] 10 battery pack.

[0026] X first direction;

[0027] Y second direction;

[0028] Z thickness direction. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0035] In order to understand the embodiments of the present application more clearly, the following Figures 1 to 7 The embodiments of the present application are described in detail.

[0036] like Figure 1 and Figure 2 As shown, the present application provides a battery connector 1, which includes a substrate 11 and a thickening layer 12. The substrate 11 is formed by hot pressing multiple layers of thin materials, and the substrate 11 includes a welding area 111 and a non-welding area 112; the thickening layer 12 is laminated to the non-welding area 112 along the thickness direction Z to form a thickened portion 13 with a thickness greater than that of the welding area 111.

[0037] The substrate 11 is formed by hot pressing multiple layers of thin materials (such as aluminum foil, copper foil, etc.), and a welding area 111 and a non-welding area 112 are divided on the substrate 11. When the battery connector 11 is used to realize electrical connection between multiple batteries 2, the welding area 111 is welded to the output pole 21 of the battery 2.

[0038] The thickening layer 12 is laminated to the non-welding area 112 along the thickness direction Z, that is, the thickening layer 12 and the substrate 11 are manufactured separately and then laminated together. Specifically, the thickening layer 12 can be laminated to one side of the non-welding area 112 by welding, conductive adhesive bonding, etc.

[0039] In the prior art, a subtractive manufacturing method such as milling after integral molding is used to form thickened portions 13 and welding areas 111 of varying thicknesses. During the milling process, the original hot-pressed structure between the thin materials on the substrate 11 formed by hot pressing is destroyed, causing the thin materials to no longer fit together, affecting the conductivity of the substrate 11. Furthermore, the damaged thin materials cannot be hot-pressed again to restore the hot-pressed structure. However, the thickened layer 12 and substrate 11 of the present application are manufactured separately and then bonded together by welding or conductive adhesive. This does not damage the hot-pressed structure of the thin materials on the substrate 11. Welding areas 111 and thickened portions 13 of varying thicknesses can be manufactured without damaging the conductive properties of the substrate 11, thereby meeting both the welding requirements of the welding equipment and the current capacity of the battery 2.

[0040] By laminating the thickening layer 12 in the non-welding area 112 along the thickness direction Z, a thicker thickened portion 13 can be formed. During use, the welding area 111 on the battery connector 1 is welded to the output pole 21 of the battery 2. Since the thickness of the welding area 111 is relatively small, it can meet the welding requirements of the welding equipment for the battery connector 1 and the battery 2, ensuring the connection effect. Secondly, the thickening layer 12 is laminating on the non-welding area 112 to increase the thickness of the thickened portion 13, which can not only improve the strength of the thickened portion 13 but also meet the flow capacity of the battery 2. Furthermore, the base layer 11 and the thickening layer 12 are manufactured separately and then assembled and laminating together, which will not damage the structure of the substrate 11 formed by hot pressing. That is, the battery connector 1 of the present application can meet both welding requirements and flow requirements without affecting the hot pressing structure of the substrate 11.

[0041] In some embodiments, the substrate 11 and / or the thickened layer 12 are made of soft aluminum bar.

[0042] That is, in some embodiments, one of the substrate 11 and the thickened layer 12 is made of soft aluminum bar. In other embodiments, both the substrate 11 and the thickened layer 12 are made of soft aluminum bar.

[0043] The substrate 11 and / or the thickened layer 12 are made of soft aluminum, which, on the one hand, has low resistance and good conductivity, thereby reducing energy loss; on the other hand, when the output poles 21 of the connected batteries 2 are not in the same plane, the battery connector 1 can adapt by deformation, thereby ensuring the reliability of the connection.

[0044] In some embodiments, the soft aluminum bar material is formed by hot pressing multiple layers of aluminum foil.

[0045] By setting the soft aluminum bar material to be multi-layer aluminum foil hot-pressed, the aluminum foil has high chemical stability and mechanical strength, which can ensure that the battery connector 1 can maintain good performance and durability during the operation of the battery 2 to withstand long-term working environment and cyclic use.

[0046] In some embodiments, the thickened layer 12 is bonded to the non-welding area 112 by laser welding.

[0047] The thickened layer 12 and the non-welded area are connected by laser welding, so that the thickened layer 12 and the base material 11 are connected into one body after being thermally melted, thereby ensuring the connection strength between the two while also ensuring the electrical conductivity between the two.

[0048] like Figure 1 and 2 As shown, in some embodiments, the welding area 111 includes a first welding area 1111 and a second welding area 1112 spaced apart along the first direction X, and the non-welding area 112 is disposed between the first welding area 1111 and the second welding area 1112 .

[0049] By providing a first welding area 1111 and a second welding area 1112 for welding connection to the output electrode 21 of the battery 2, an electrical connection between the batteries 2 can be achieved. Furthermore, the non-welding area 112 is provided between the first welding area 1111 and the second welding area 1112. In other words, the first welding area 1111 and the second welding area 1112 of the electrical connector 1 are connected via the thickened portion 13. The thickened portion 13 can meet the current flow capacity when the current is transmitted between the two batteries 2.

[0050] In some embodiments, the welding area 111 further includes a third welding area 1113 spaced apart from the first welding area 1111 along a second direction Y; and / or a fourth welding area 1114 spaced apart from the second welding area 1112 along a second direction Y, wherein the second direction Y is perpendicular to the first direction X.

[0051] By providing the third welding area 1113 and / or the fourth welding area 1114 , the number of electrically connected batteries 2 can be further increased, thereby further improving the voltage and current of the output electric energy.

[0052] like Figure 1 and Figure 2 As shown, in some embodiments, a notch 14 is provided at the intersection of the first welding area 1111 , the second welding area 1112 , the third welding area 1113 and the fourth welding area 1114 .

[0053] The notch 14 may be a regular shape such as a circle or a square, or an irregular shape formed by a combination of straight lines and / or curves, and this embodiment of the present application does not limit this.

[0054] The provision of the notch 14 can relieve stress in the battery connector 1 and increase the service life of the battery connector 1. For example, when there is a height difference between the four batteries 2 connected to the battery connector 1, the provision of the notch 14 can relieve stress generated by the deformation of the battery connector 1 to accommodate the height difference. In addition, when the batteries 2 encounter vibration or other working conditions during use, the height difference between the four batteries 2 connected to the battery connector 1 may also change accordingly. The provision of the notch 14 can relieve stress generated by the deformation of the battery connector 1.

[0055] like Figure 1 and 2 As shown, in some embodiments, a first bending portion 15 extending along the second direction Y is provided between the first welding area 111 and the second welding area 1112; and / or a second bending portion 16 extending along the first direction X is provided between the third welding area 1113 and the fourth welding area 1114.

[0056] By providing the first bent portion 15 and / or the second bent portion 16 to form a reinforcing rib, on the one hand, the strength of the battery connector 1 can be improved. On the other hand, when the battery 2 encounters working conditions such as vibration during use, the bent portion 15 and / or the bent portion 16 can absorb the stress generated by the vibration, thereby further improving the service life of the battery connector 1.

[0057] It should be noted that the number of the welding areas 111 is not limited to the number described in the above embodiment, and the number of the notches 14 can also be selected according to the number of the welding areas 111 .

[0058] like Figures 3 to 6 As shown, the present application provides a battery assembly 10 on the other hand, which includes a battery connector 1 and at least two batteries 2. The battery 2 includes an output pole 21, and the output pole 21 is connected to the welding area 111 by welding to achieve electrical connection between the batteries 2.

[0059] The battery assembly 10 is composed of at least two batteries 2 electrically connected in series, parallel, or hybrid (meaning multiple battery cells are connected in both series and parallel). In some embodiments, the batteries 2 can be secured together with channel bands to prevent relative movement. In some embodiments, the battery assembly 10 can also be placed in a receiving chamber to form a single unit.

[0060] Battery 2 can be a lithium-ion battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., and this embodiment of the application does not limit this. Battery 2 can be cylindrical, flat, rectangular, or other shapes, etc., and this embodiment of the application does not limit this.

[0061] The output electrode 21 refers to the component that outputs electrical energy in the battery 2, including the positive output electrode and the negative output electrode. The output electrode 21 of the battery 2 is connected to the welding area 111 by welding to realize series, parallel or mixed connection between different batteries 2.

[0062] like Figure 7 As shown, on another aspect, the present application provides an electrical device, which includes a battery assembly 10. The battery assembly 10 is used to provide electrical energy to the electrical device.

[0063] Electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0064] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0065] like Figure 7 As shown, the vehicle includes a battery assembly 10, which can be installed at the bottom, front, or rear of the vehicle. The battery assembly 10 can not only serve as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0066] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A battery connector, characterized in that: The battery connector includes: A substrate formed by hot pressing multiple layers of thin materials, the substrate including a welding area and a non-welding area; The thickening layer is arranged in the non-welding area along the thickness direction to form a thickening portion with a thickness greater than that of the welding area.

2. The battery connector according to claim 1, wherein: The substrate and / or the thickened layer are made of soft aluminum bar.

3. The battery connector according to claim 2, wherein: The soft aluminum bar material is made of multi-layer aluminum foil by hot pressing.

4. The battery connector according to any one of claims 1 to 3, characterized in that: The thickened layer is bonded to the non-welding area by laser welding.

5. The battery connector according to any one of claims 1 to 3, characterized in that: The welding area includes a first welding area and a second welding area spaced apart along a first direction, and the non-welding area is disposed between the first welding area and the second welding area.

6. The battery connector according to claim 5, characterized in that: The welding area further includes a third welding area spaced apart from the first welding area along a second direction; and / or a fourth welding area spaced apart from the second welding area along a second direction, wherein the second direction is perpendicular to the first direction.

7. The battery connector according to claim 6, characterized in that: A notch is provided at the intersection of the first welding area, the second welding area, the third welding area and the fourth welding area.

8. The battery connector according to claim 6 or 7, characterized in that: A first bending portion extending along the second direction is provided between the first welding area and the second welding area; and / or A second bending portion extending along the first direction is provided between the third welding area and the fourth welding area.

9. A battery assembly, characterized in that: The battery assembly comprises: The battery connector according to any one of claims 1 to 8; and At least two batteries, each battery including an output electrode, wherein the output electrode is connected to the welding area by welding to achieve electrical connection between the batteries.

10. An electrical device, characterized in that: The electrical device comprises: The battery assembly according to claim 9 is used to provide electrical energy to the electrical device.

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