Electrode terminal connection structure for power supply device, and power supply device
A simplified H-shaped assembly of electric terminal pieces and PTC components addresses the complexity and cost issues in battery connections, achieving lower material and processing costs through parallel and serial connections.
Patent Information
- Application Number
- CN202422095059.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-28
AI Technical Summary
The existing battery packs have complex connection methods, high cost and many safety functional components, making it difficult to achieve a simple and low-cost connection structure.
The two electrode terminal pieces and the PTC components arranged oppositely are integrated into an H-shaped shape. By connecting first in parallel and then in series, the connection process of the battery pack is simplified and the number of electrode terminal pieces and PTC components is reduced.
It reduces material and processing costs, improves cost-effectiveness, simplifies operating procedures, and enhances the safety of the battery pack.
Smart Images
Figure CN223109157U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an electrode terminal connection structure for a power supply device and a power supply device. Background Art
[0002] In recent years, various electronic products have been continuously developed, and the requirements for battery packs as power supplies for driving these electronic products have been continuously improved. Based on considerations of their performance such as safety, production efficiency, and cost, various studies have been carried out on the connection methods and structures of battery packs.
[0003] Currently, there is an urgent need to develop an electrode terminal connection structure with a simple connection method, a small number of connection pieces and safety functional components, a simple overall structure, and low cost, as well as a power supply device such as a battery pack using the electrode terminal connection structure. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an electrode terminal connection structure with a simple connection structure, low cost, and high cost performance, as well as a power supply device using the electrode terminal connection structure.
[0005] In order to achieve the above object, the inventors have conducted careful research and obtained the following technical solutions.
[0006] (1) An electrode terminal connection structure for a power supply device, characterized in that it includes two electrode terminal pieces arranged opposite to each other and a PTC component connected between the two electrode terminal pieces, and the two electrode terminal pieces and the PTC component are integrally connected into an H shape.
[0007] (2) The terminal connection structure according to the above (1), characterized in that the electrode terminal piece is a positive terminal piece or a negative terminal piece.
[0008] (3) The terminal connection structure according to the above (1) or (2), characterized in that the electrode terminal piece is a nickel piece, a nickel-plated iron piece, or a stainless steel piece.
[0009] (4) The terminal connection structure according to the above (1) or (2), characterized in that the two electrode terminal pieces are respectively used to connect to the same-polarity electrode terminals of multiple batteries arranged side by side.
[0010] (5) The terminal connection structure according to the above (4), characterized in that the battery is a primary battery or a secondary battery.
[0011] (6)A power supply device, characterized in that it comprises a plurality of battery packs connected in series, each of the battery packs containing a plurality of batteries arranged side by side and electrode terminal sheets for connecting the plurality of batteries in parallel, and a PTC component is connected between the electrode terminal sheets on the same end side of two adjacent battery packs to connect the two battery packs in series.
[0012] (7) The power supply device according to (6) above, characterized in that the electrode terminal sheet is a positive terminal sheet or a negative terminal sheet.
[0013] (8) The power supply device according to (6) or (7) above, characterized in that the electrode terminal sheet is a nickel sheet, a nickel-plated iron sheet or a stainless steel sheet.
[0014] (9) The power supply device according to (6) or (7) above, characterized in that the electrode terminal sheet is welded to the electrode terminal of the battery in the battery pack by spot welding.
[0015] (10) The power supply device according to (6) or (7) above, characterized in that the battery in the battery pack is a primary battery or a secondary battery.
[0016] Effects of the utility model
[0017] In the electrode terminal connection structure for the power supply device of the present utility model, since the PTC component and the terminal sheet are integrally connected, the cost and operation man-hours can be reduced. The connection method of the power supply device of the present utility model is to connect a plurality of batteries in parallel with one electrode terminal sheet to form a parallel battery pack, and then connect a plurality of such parallel battery packs in series, and a PTC component is connected in this series connection. Such a connection method of first parallel and then series is simple to operate, and the number of electrode terminal sheets and PTC components is small, so the overall material cost and processing cost are greatly reduced, and the overall cost performance is improved. Description of the drawings
[0018] Figs. 1(a) and 1(b) are schematic views of an example of the electrode terminal connection structure of the present utility model. Among them, Fig. 1(a) is a front view, and Fig. 1(b) is a perspective view.
[0019] Figs. 2(a) and 2(b) are schematic views of an example of the power supply device of the present utility model. Among them, Fig. 2(a) is a schematic view of the top surface of the power supply device, and Fig. 2(b) is a schematic view of the bottom surface of the power supply device.
[0020] Figs. 3(a) and 3(b) are schematic views of another example of the power supply device of the present utility model. Among them, Fig. 3(a) is a schematic view of the top surface of the power supply device, and Fig. 3(b) is a schematic view of the bottom surface of the power supply device. Detailed implementation manners
[0021] Hereinafter, the specific embodiments and examples of the present utility model will be described in detail with reference to the accompanying drawings. The described embodiments and examples are merely exemplary and can take various forms. In addition, the various drawings disclosed in this specification are merely schematic diagrams in principle. That is, the dimensional ratios on the drawings are not necessarily the same as the actual dimensional ratios, and the dimensional ratios are not necessarily the same among the various drawings.
[0022] (First Embodiment)
[0023] The first embodiment of the present utility model is an electrode terminal connection structure for a power supply device, characterized in that it includes two electrode terminal pieces arranged oppositely and a PTC component connected between the two electrode terminal pieces, and the two electrode terminal pieces and the PTC component are integrally connected into an H shape.
[0024] FIG. 1(a) and FIG. 1(b) are schematic diagrams of an example of the electrode terminal connection structure of the present utility model. Among them, FIG. 1(a) is a front view, and FIG. 1(b) is a perspective view.
[0025] As shown in FIG. 1(a) and FIG. 1(b), the electrode terminal connection structure 5 includes two electrode terminal pieces 3, 3 arranged oppositely and a PTC component 4 connected between the two electrode terminal pieces 3, 3. The electrode terminal piece 3 is a conductive strip-shaped piece, and the length and width of the strip-shaped piece can be adjusted according to the size and number of the battery packs to be connected. In addition, the electrode terminal piece 3 can be in a bent state, or a more complex Z-shaped bent state, or an irregular special-shaped state according to the actual configuration and arrangement of the battery packs.
[0026] The above PTC component 4 is connected to the two electrode terminal pieces 3, 3 to form an H shape. The connection method is not particularly limited. For example, it can be spot welding. The two electrode terminal pieces 3, 3 arranged oppositely are preferably parallel to each other, but they do not have to be parallel and can also form a certain intersection angle. That is to say, for the above H shape, its shape does not have to be a standard H shape, and according to the configuration shape of the battery packs to be connected, the above H shape can undergo corresponding deformations, such as bending or zigzagging.
[0027] The above electrode terminal piece can be a positive terminal piece or a negative terminal piece.
[0028] The distance between the two electrode terminal pieces 3, 3 arranged oppositely is determined by the size and the distance between adjacent two groups of battery packs to be connected.
[0029] Regarding the electrode terminal connection structure 5, in order to achieve the balance of the internal resistance value of the battery as much as possible after its use, the PTC component 4 is preferably connected to the central part in the length direction of the electrode terminal piece 3. However, according to actual needs, the PTC component 4 can be connected to any part in the length direction of the electrode terminal piece 3.
[0030] The above-mentioned PTC component refers to a positive temperature coefficient thermistor, also known as a PTC thermistor. A PTC thermistor is a typical semiconductor resistor with temperature sensitivity. When the temperature exceeds a certain value, its resistance value increases step by step with the increase of temperature. When the circuit is working normally, the temperature of the PTC thermistor is close to room temperature and the resistance is very small. It is connected in series in the circuit and will not hinder the passage of current. When the circuit has an excessive current due to a fault, the temperature of the PTC thermistor rises due to the increase of the heating power. When the temperature exceeds the switching temperature, the resistance will instantaneously increase sharply, and the current in the circuit will quickly decrease to a safe value. Thus, the above-mentioned PTC component becomes a safety protection component of the battery pack.
[0031] In the electrode terminal connection structure 5, in addition to the connected PTC component, other types of functional components can also be connected according to actual needs, such as an overcurrent protection component, a battery printed circuit board (PCB board), etc.
[0032] The thickness of the above-mentioned electrode terminal piece can be selected according to actual needs such as strength, flexibility or deformability, usually 0.1 mm to 1.0 mm, preferably 0.15 mm to 0.5 mm. The width of the above-mentioned electrode terminal piece can be selected according to actual needs, usually 4 mm to 12 mm, preferably 6 mm to 9 mm.
[0033] The above-mentioned electrode terminal piece is preferably a sheet-shaped metal plate, and its material is a metal material. Considering the conductivity and welding strength of the electrode terminal connection structure, the above-mentioned metal material is preferably nickel, nickel-plated iron or stainless steel. That is, the above-mentioned electrode terminal piece is usually a nickel sheet, a nickel-plated iron sheet or a stainless steel sheet, preferably a nickel sheet. Considering improving processing efficiency, reducing costs and man-hours, the above-mentioned electrode terminal piece is preferably integrally blanked from a sheet.
[0034] When the above-mentioned electrode terminal connection structure is connected to multiple batteries arranged in parallel, the above two electrode terminal pieces are used to be connected to the same-polarity electrode terminals of the multiple batteries arranged in parallel respectively to form two parallel battery packs, and these two parallel battery packs are connected in series through the conduction circuit of the PTC component. The above-mentioned electrode terminal piece is usually used to be welded to the above-mentioned electrode terminal by spot welding.
[0035] The width of the above-mentioned PTC component can be selected according to actual needs, usually 3 mm to 9 mm, preferably 4 mm to 7 mm.
[0036] In the above terminal connection structure, there may be a height difference of approximately 0.5 mm to 3 mm between the PTC component connected between the two electrode terminal pieces and the upper surfaces of the two electrode terminal pieces respectively.
[0037] In addition, the above battery may be a primary battery or a secondary battery. The secondary battery may be a lithium secondary battery, a nickel-metal hydride secondary battery, etc.
[0038] Since the above electrode terminal connection structure is integrally formed by a PTC component and two electrode terminal pieces, using it can reduce costs and man-hours.
[0039] (Second Embodiment)
[0040] The second embodiment of the present utility model provides a power supply device, characterized in that it includes a plurality of battery packs connected in series, the battery pack includes a plurality of batteries arranged side by side and electrode terminal pieces connecting the plurality of batteries in parallel, and a PTC component is connected between the electrode terminal pieces located on the same end side of two adjacent battery packs respectively to connect the two battery packs in series.
[0041] The above electrode terminal piece may be a positive terminal piece or a negative terminal piece. Since in a plurality of battery packs connected in series, a PTC component is connected between the electrode terminal pieces located on the same end side of two adjacent battery packs respectively to connect the two battery packs in series, one of the electrode terminal pieces connected to the PTC component is a positive terminal piece and the other is a negative terminal piece. The so-called same end side refers to the top surface or the bottom surface of the battery pack. Moreover, the so-called top surface and bottom surface are concepts of relative positions and do not represent absolute upper and lower surfaces.
[0042] The material, thickness, width, shape, etc. of the above electrode terminal pieces are the same as those described in the first embodiment.
[0043] In the above power supply device, the two above electrode terminal pieces are used to connect to the same-polarity electrode terminals of a plurality of batteries arranged side by side respectively to form two parallel battery packs, and the two parallel battery packs are connected in series through the conduction circuit of the PTC component. The above electrode terminal pieces are usually welded to the electrode terminals of the battery by spot welding.
[0044] In addition, the width of the above PTC component can be selected according to actual needs. There is a height difference of approximately 0.5 mm to 3 mm between the PTC component connected between the two electrode terminal pieces and the upper surfaces of the two electrode terminal pieces respectively.
[0045] The power supply device of the second embodiment of the present utility model is a power supply device that utilizes the electrode terminal connection structure of the first embodiment. The constitution and arrangement state of each component of the electrode terminal connection structure are the same as those described in the first embodiment.
[0046] Figs. 2(a) and 2(b) are schematic diagrams of an example of the power supply device of the present utility model. Among them, Fig. 2(a) is a schematic top view of the power supply device, and Fig. 2(b) is a schematic bottom view of the power supply device.
[0047] As shown in Figs. 2(a) and 2(b), the power supply device 20 includes three battery packs 10a, 10b, and 10c connected in series and arranged side by side. Each of the battery packs 10a, 10b, and 10c contains 4 batteries arranged side by side and an electrode terminal piece 3 that connects the 4 batteries in parallel. A PTC component 4 is connected between two of the electrode terminal pieces 3 of two adjacent battery packs 10a and 10b to connect the two battery packs in series.
[0048] The connection method of the power supply device 20 is as follows: The 4 batteries are connected in parallel with the electrode terminal piece 3 in three times to form parallel battery packs 10a, 10b, and 10c respectively, and then the 3 parallel battery packs 10a, 10b, and 10c are connected in series. The battery packs 10a and 10b are connected in series through the PTC component 4 on the top surface shown in Fig. 2(a), and the battery packs 10b and 10c are connected in series through the conductive connection piece 8 on the bottom surface shown in Fig. 2(b). Such a connection method of first parallel and then series is relatively simple, the number of electrode terminal pieces and PTC components is small, so the overall material cost and processing cost are greatly reduced, and the overall cost performance is improved.
[0049] In order to achieve the balance of the resistance value inside the battery as much as possible, the PTC component 4 is preferably connected to the central part in the length direction of the electrode terminal piece 3. However, according to actual needs, the PTC component 4 can be connected to any part in the length direction of the electrode terminal piece 3.
[0050] Since the battery packs 10a, 10b, and 10c are connected in series with each other, one of the electrode terminal pieces of the battery packs 10a and 10b connected to the PTC component is the positive terminal piece, and the other electrode terminal piece is the negative terminal piece.
[0051] Although not shown in the figure, a positive lead or a negative lead is connected to the electrode terminal piece 3 on the top surface of the battery pack 10a, and correspondingly, a negative lead or a positive lead is connected to the electrode terminal piece 3 on the bottom surface of the battery pack 10c. The position where the electrode terminal piece 3 is connected to the positive lead or the negative lead does not necessarily have to be at the end, and this position is selected based on making the resistance value inside the battery balanced as much as possible.
[0052] In the battery packs 10a, 10b, and 10c, except for the electrical connection between the electrode terminal pieces, other adjacent parts between adjacent batteries are insulated. This insulation is achieved by the insulating coating film or sheet on the outer surface of the individual batteries. Moreover, adjacent batteries can be bonded together by an adhesive to fix the entire battery pack together.
[0053] When an excessive current occurs inside the power supply device due to a fault, the PTC component will function to protect the power supply device or battery pack.
[0054] In addition, the power supply device shown in FIG. 2(a) and FIG. 2(b) may be provided with other types of functional components according to actual needs, such as overcurrent protection components, battery circuit boards (PCB boards), etc. These functional components are insulated from the PTC components by insulating sheets or insulating films to prevent adverse conditions such as short circuits between them. These functional components are connected to the battery control unit through their own circuits and play a role in the charging and discharging process of the power supply device.
[0055] A support sheet having a load-bearing and fixing function may be provided on the top or bottom surface of the power supply device shown in FIG. 2( a ) and FIG. 2( b ) according to actual needs. The support sheet may also have an insulating function.
[0056] Fig. 3(a) and Fig. 3(b) are schematic diagrams of another example of the power supply device of the utility model. Fig. 3(a) is a schematic diagram of the top surface of the power supply device, and Fig. 3(b) is a schematic diagram of the bottom surface of the power supply device. As shown in Fig. 3(a) and Fig. 3(b), the power supply device 40 includes 4 battery groups 30a, 30b, 30c, and 30d connected in series and arranged side by side. The battery groups 30a, 30b, 30c, and 30d each include 5 batteries arranged side by side and electrode terminal pieces 3 connecting the 5 batteries in parallel. A PTC component 4 is connected between the electrode terminal pieces 3 of each of the two adjacent battery groups 30b and 30c so that the two battery groups are connected in series.
[0057] The connection method of the power supply device 40 is as follows: first, five batteries are connected in parallel with electrode terminal pieces 3 in four times to form parallel battery groups 30a, 30b, 30c, and 30d respectively, and then the four parallel battery groups 30a, 30b, 30c, and 30d are connected in series, and the series connection is performed by the PTC component 4 on the top surface shown in Figure 3 (a) and the two conductive connecting pieces 8 on the bottom surface shown in Figure 3 (b). This connection method of first connecting in parallel and then in series is relatively simple, and the number of electrode terminal pieces and PTC components is small, so the overall material cost and processing cost are greatly reduced, and the overall cost performance is improved.
[0058] The other components of the power supply device 40 and their functions are the same as the corresponding parts of the power supply device 20, and thus the description thereof is omitted here.
[0059] In this embodiment, the above battery can be a primary battery or a secondary battery. The above secondary battery is preferably various secondary batteries such as a lithium-ion secondary battery and a nickel-metal hydride secondary battery. In the present utility model, although only a cylindrical battery is shown in the drawings, the battery can also be a square battery or a battery of other shapes.
[0060] The connection mode of the power supply device of this embodiment is to first connect a plurality of batteries in parallel with an electrode terminal piece to form a parallel battery pack, and then connect a plurality of such parallel battery packs in series, and a PTC component is connected in this series connection. Such a connection mode of first parallel and then series is simple to operate, and the number of electrode terminal pieces and PTC components is small, so the overall material cost and processing cost are greatly reduced, and the overall cost performance is improved.
[0061] Other advantages and improvements of the present utility model will be easily conceived by those skilled in the art. Therefore, the scope of the present utility model is not limited by the above typical examples and specific details. Therefore, the present utility model can be variously changed and improved without departing from the spirit or scope of the general inventive concept defined by the claims.
[0062] Industrial applicability
[0063] The present utility model can provide an electrode terminal connection structure body with a simple connection structure, low cost and high cost performance, and a power supply device using the electrode terminal connection structure body.
Claims
1. An electrode terminal connection structure for a power supply device, characterized in that, It includes two electrode terminal pieces arranged oppositely and a PTC component connected between the two electrode terminal pieces, and the two electrode terminal pieces and the PTC component are integrally connected into an H shape.
2. The terminal connection structure according to claim 1, wherein The electrode terminal piece is a positive electrode terminal piece or a negative electrode terminal piece.
3. The terminal connection structure according to claim 1 or 2, wherein The electrode terminal piece is a nickel piece, a nickel-plated iron piece or a stainless steel piece.
4. The terminal connection structure according to claim 1 or 2, characterized in that, The two electrode terminal pieces are respectively used for connecting with the same-polarity electrode terminals of multiple batteries arranged side by side.
5. The terminal connection structure according to claim 4, characterized in that, The battery is a primary battery or a secondary battery.
6. A power supply device, characterized in that, It includes a plurality of battery packs connected in series. The battery pack includes multiple batteries arranged side by side and electrode terminal pieces for connecting the multiple batteries in parallel. A PTC component is connected between the electrode terminal pieces on the same end side of two adjacent battery packs respectively to connect the two battery packs in series.
7. The power supply device according to claim 6, characterized in that, The electrode terminal piece is a positive electrode terminal piece or a negative electrode terminal piece.
8. The power supply device according to claim 6 or 7, characterized in that, The electrode terminal piece is a nickel piece, a nickel-plated iron piece or a stainless steel piece.
9. The power supply device according to claim 6 or 7, characterized in that, The electrode terminal piece is welded to the electrode terminal of the battery in the battery pack by spot welding.
10. The power supply device according to claim 6 or 7, characterized in that, The battery in the battery pack is a primary battery or a secondary battery.