Integrated double-nickel-sheet terminal and battery management system

Abstract

The utility model provides an integrated double-nickel-sheet terminal and a battery management system. The double-nickel-sheet terminal comprises an upper-layer nickel sheet part, an insulating part and a lower-layer nickel sheet part which are sequentially distributed, wherein the upper-layer nickel sheet part and the lower-layer nickel sheet part are respectively connected to the insulating part; the upper-layer nickel sheet part and the lower-layer nickel sheet part are electrically isolated through the insulating part; the upper layer nickel sheet part and the lower layer nickel sheet part respectively comprise two connecting ends. According to the technical scheme of the utility model, the occupied area of the nickel sheet is saved, the circuit board arrangement area is increased, the wiring is more flexible, the area of the reinforcing plate can be reduced, the process cost is reduced, and the process steps are simplified.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power electronics, especially to an integrated double-nickel-terminal and a battery management system. BACKGROUND

[0002] In the circuit design with high precision requirement, the traditional two-wire method (usually based on single-nickel) for measuring resistance, i.e. the current loop and the voltage loop share the same wire, cannot meet the requirement.

[0003] The two-wire method has some drawbacks, mainly in the aspects of measurement accuracy, applicability, and reliability:

[0004] (1) Measurement accuracy

[0005] Cannot eliminate the influence of lead resistance: When measuring resistance with the two-wire method, the total resistance of the single-nickel and the connecting lead is measured. Since the lead itself has a certain resistance, especially when measuring small resistance values of single-nickel, the influence of lead resistance cannot be ignored, which will cause the measured result to be larger than the actual resistance value of single-nickel, reducing the measurement accuracy. For example, when measuring a single-nickel with a resistance value of several milliohms, if the lead resistance is 1 milliohm, the measurement error may reach 20% or even higher.

[0006] Affected greatly by contact resistance: In the two-wire method, there is contact resistance at the connection point between the single-nickel and the measuring instrument. This contact resistance will be in series with the single-nickel resistance and be measured together. The contact resistance is affected by factors such as contact pressure and surface oxidation, and has uncertainty, which will cause large fluctuations in the measurement result and make it difficult to accurately reflect the true resistance value of the single-nickel.

[0007] (2) Applicability

[0008] Firstly, not suitable for high-precision measurement: In fields with extremely high precision requirements, such as scientific research, high-end electronic manufacturing, etc., such as micro-resistance measurement in semiconductor manufacturing and high-precision sensor calibration, the measurement accuracy of the two-wire method using single-nickel cannot meet the requirements, which may lead to product quality problems or inaccurate experimental results.

[0009] Secondly, not suitable for large-current measurement: In the case of large current, the single-nickel will generate a large voltage drop, which not only causes the single-nickel itself to heat up, leading to changes in resistance value with temperature, but also changes the current distribution in the measurement loop, further affecting the measurement accuracy. At the same time, large current may cause phenomena such as metal electromigration at the contact point, changing the contact resistance and making the measurement result even more unstable.

[0010] (3) Reliability

[0011] Connection stability issues: When using the two-wire connection method, single nickel sheets typically have only two connection points. Under environmental conditions such as vibration and impact, these connection points are prone to loosening, leading to poor contact, fluctuations in measurement results, or even failure to measure normally. For example, in applications with high vibration, such as automotive and aerospace, the connection of a single nickel sheet may intermittently break due to vibration, affecting the normal operation of the relevant system.

[0012] (4) Weak anti-interference ability

[0013] The two-wire method has a relatively simple measurement circuit and lacks specific anti-interference measures, making it susceptible to external electromagnetic interference. For example, in industrial environments with strong electromagnetic fields, electromagnetic interference may induce an electromotive force in the measurement circuit, which is superimposed on the measurement signal, leading to deviations in the measurement results.

[0014] In designs requiring high precision, a scheme that separates the current path from the voltage detection path, known as the Kelvin connection, is generally used. This can significantly improve measurement accuracy and system stability, which is crucial for designing high-performance power electronic circuits.

[0015] In existing Kelvin connection methods, the positive and negative electrodes each require two single nickel plates, such as... Figure 1 As shown, this scheme has the following disadvantages: (1) The two single nickel plate terminals 1 need to be set separately. One end of the two single nickel plate terminals is connected to the circuit board 2, and the other end is connected to the conductive connector 3. There will be a certain area between the two single nickel plate terminals. However, since the space between the two is relatively small and not conducive to wiring, it is impossible to place components. Therefore, the area between the two is a useless area 11. As a result, the area occupied by the two single nickel plates is relatively large, leaving a large area for the board layout A. Figure 1 (2) The shaded area at the midpoint is relatively small; (3) Due to the small board area, the circuit layout is complex and the components occupy a large area. Therefore, when the circuit board is an FPC and a reinforcing plate is required, the area of ​​the reinforcing plate is relatively large; a large area of ​​reinforcing plate increases the process cost. Utility Model Content

[0016] This utility model provides an integrated dual-nickel sheet terminal and battery management system to solve the problems of large nickel sheet area, small board area, complex circuit layout, large component area, large reinforcement board area, and high process cost in the prior art.

[0017] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0018] According to a first aspect of the present invention, an integrated double nickel strip terminal is provided, comprising, in sequence: an upper nickel strip portion, an insulating portion, and a lower nickel strip portion; wherein,

[0019] The upper layer nickel sheet part and the lower layer nickel sheet part are respectively connected to the insulating part; the upper layer nickel sheet part and the lower layer nickel sheet part are electrically isolated by the insulating part.

[0020] The upper layer nickel sheet part and the lower layer nickel sheet part each include two connection ends.

[0021] Optionally, the upper layer nickel sheet part includes, in sequence, an upper layer pad, a top layer nickel sheet, and an upper layer extended nickel sheet; the top layer nickel sheet is located above the insulating part; the upper layer pad serves as one connection end of the upper layer nickel sheet part; and the upper layer extended nickel sheet serves as another connection end of the upper layer nickel sheet part.

[0022] The lower layer nickel sheet part includes, in sequence, a lower layer pad, a bottom layer nickel sheet, and a lower layer extended nickel sheet; the bottom layer nickel sheet is located below the insulating part; the lower layer pad serves as one connection end of the lower layer nickel sheet part; and the lower layer extended nickel sheet serves as another connection end of the lower layer nickel sheet part.

[0023] Optionally, the upper layer pad and the lower layer pad are located on different sides of the insulating part.

[0024] The upper layer extended nickel sheet and the lower layer extended nickel sheet are located on the same side of the insulating part; and the upper layer extended nickel sheet and the lower layer extended nickel sheet are located on different sides of the upper layer pad and the lower layer pad.

[0025] Optionally, the upper layer pad and the lower layer pad are located on the same horizontal plane; and the horizontal plane on which the upper layer pad and the lower layer pad are located is lower than the bottom of the insulating part.

[0026] The upper layer extended nickel sheet and the lower layer extended nickel sheet are located on the same horizontal plane.

[0027] Optionally, the horizontal plane on which the upper layer extended nickel sheet and the lower layer extended nickel sheet are located is different from the horizontal plane on which the upper layer pad and the lower layer pad are located.

[0028] Optionally, the insulating part includes four side surfaces.

[0029] The upper layer nickel sheet part is connected to the insulating part by an upper layer buckle; and the upper layer buckle is located on opposite sides of the insulating part.

[0030] The lower layer nickel sheet part is connected to the insulating part by a lower layer buckle; and the lower layer buckle is located on the bottom of the insulating part.

[0031] Optionally, the upper layer pad is located on one side or both sides of the insulating part on which the upper layer buckle is located; and the length of the upper layer pad is less than the length of the side of the insulating part on which the upper layer pad is located.

[0032] The side of the insulating part where the upper layer extended nickel sheet and the lower layer extended nickel sheet are located is different from the side where the upper layer buckle is located.

[0033] Optionally, the lower layer nickel sheet part is also connected to the insulating part through a lower layer buckle slot, and the lower layer buckle slot is located on the opposite sides of the insulating part where the upper layer buckle is located.

[0034] Optionally, a spring sheet is arranged between the upper layer nickel sheet part and the insulating part.

[0035] According to a second aspect of the present application, a battery management system is provided, which comprises: a conductive connecting piece, a circuit board, and the integrated double nickel sheet terminal according to any one of the above; wherein,

[0036] The two ends of the upper layer nickel sheet part of the integrated double nickel sheet terminal are connected to the conductive connecting piece and the circuit board, respectively;

[0037] The two ends of the lower layer nickel sheet part of the integrated double nickel sheet terminal are connected to the conductive connecting piece and the circuit board, respectively.

[0038] The integrated double nickel sheet terminal and the battery management system provided by the present application design an integrated double nickel sheet terminal, which can realize Kelvin connection through the double nickel sheet terminal. Firstly, compared with the Kelvin connection realized by two single nickel sheets in the prior art, there is no useless area between the two single nickel sheets, the area occupation of the nickel sheet is saved, and the integrated double nickel sheet terminal can be placed at different positions according to the circuit layout. Secondly, due to the saving of the area occupation of the nickel sheet, the circuit board area is increased, the wiring is more flexible, the reinforcing plate area can be reduced, and the process cost is reduced. Then, compared with the two single nickel sheets in the prior art, two times of patching process are required, and the integrated double nickel sheet terminal only needs one time of patching process, thereby simplifying the process steps.

[0039] In an optional solution of the present application, the upper layer extended nickel sheet and the lower layer extended nickel sheet are located on the same horizontal plane, so that one or both of the upper layer nickel sheet part and the lower layer nickel sheet part have a bending part, and at least one bending part is located on the side of the insulating part, which can play a certain buffering role when the components connected at the end (such as a module in a battery system) shake left and right.

[0040] In an optional solution of the present application, the horizontal plane where the upper layer extended nickel sheet and the lower layer extended nickel sheet are located is different from the horizontal plane where the upper layer pad and the lower layer pad are located, i.e. the two connecting ends of the upper layer nickel sheet part and the lower layer nickel sheet part are located at different heights, which facilitates the setting of the components connected to the two connecting ends.

[0041] The upper layer nickel sheet part and the lower layer nickel sheet part are connected with the insulating part through buckles, convenient for assembly, and convenient for disassembly when one part fails or needs to be replaced.

[0042] In an optional solution of the utility model, the upper layer soldering pad is located at one side or both sides of the insulating part where the upper layer buckle is located; the length of the upper layer soldering pad is less than the length of the insulating part at the side, reducing the soldering pad area, the nickel sheet bottom can be threaded, the jumper resistor is saved, and the process cost is further reduced.

[0043] In an optional solution of the utility model, the lower layer nickel sheet part is connected with the insulating part not only through the lower layer buckle located at the bottom of the insulating part, but also through the clamping groove located at the side of the insulating part, further ensuring the stability of the connection. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0045] Figure 1 It is a layout schematic view of the existing single nickel sheet terminal;

[0046] Figure 2 It is a schematic view of the integrated double nickel sheet terminal of an embodiment of the utility model;

[0047] Figure 3 It is an explosion and assembly schematic view of the integrated double nickel sheet terminal of an embodiment of the utility model;

[0048] Figure 4 It is a layout schematic view of the integrated double nickel sheet terminal of an embodiment of the utility model;

[0049] Figure 5 It is a connection top view of the integrated double nickel sheet terminal of an embodiment of the utility model;

[0050] Figure 6 It is a connection side view of the integrated double nickel sheet terminal of an embodiment of the utility model;

[0051] Figure 7 It is a bottom view of the integrated double nickel sheet terminal of an embodiment of the utility model;

[0052] Figure 8 It is a wiring schematic view of the bottom of the integrated double nickel sheet terminal of an embodiment of the utility model;

[0053] Reference Signs List:

[0054] 1 - single nickel sheet terminal;

[0055] 11 - useless area;

[0056] 12 - pad area;

[0057] 2 - circuit board;

[0058] 21 - layout area A;

[0059] 22 - layout area B;

[0060] 3 - conductive connection;

[0061] 4 - integrated double nickel sheet terminal;

[0062] 41 - upper nickel sheet part;

[0063] 411 - upper pad;

[0064] 412 - top nickel sheet;

[0065] 413 - upper extension nickel sheet;

[0066] 414 - bending part;

[0067] 42 - insulation part;

[0068] 421 - limiting bump;

[0069] 422 - elastic sheet;

[0070] 43 - lower nickel sheet part;

[0071] 431 - lower pad;

[0072] 432 - bottom nickel sheet;

[0073] 433 - lower extension nickel sheet;

[0074] 5 - upper buckle;

[0075] 51 - first protrusion;

[0076] 52 - first hole;

[0077] 61 - lower buckle;

[0078] 611 - second protrusion;

[0079] 612 - second hole;

[0080] 62 - lower buckle slot;

[0081] 621 - slot;

[0082] 622 - bump;

[0083] 7 - trace. DETAILED DESCRIPTION

[0084] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0085] In the description of the present application, it should be understood that the terms "upper", "lower", "upper end", "lower end", "lower surface", "upper surface" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0086] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0087] In the description of the present application, "a plurality of" means a plurality, for example, two, three, four, etc., unless otherwise specifically limited.

[0088] In the description of the present application, unless otherwise specifically defined and limited, the terms "connection" and the like should be broadly understood, for example, it can be fixedly connected, or detachably connected, or integrated; it can be mechanically connected, or electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0089] The technical solutions of the present application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in some embodiments.

[0090] In an embodiment, an integrated double-nickel piece terminal is provided, please refer to Figure 2 , Figure 3, which comprises, in sequence: an upper nickel sheet part 41, an insulating part 42, and a lower nickel sheet part 43, as shown in Figure 2 The figure shows a schematic diagram of the integrated nickel sheet terminal, as shown in Figure 3 The figure shows an exploded view. The upper nickel sheet part 41 and the lower nickel sheet part 43 are respectively connected to the insulating part 42; the upper nickel sheet part 41 and the lower nickel sheet part 42 are electrically isolated by the insulating part 42. The upper nickel sheet part and the lower nickel sheet part each comprise two connecting ends, for realizing the connection between circuits, signal transmission, power transmission, and the like. In various electronic devices and electrical systems, different circuit components, circuit boards, and the like need to be reliably connected, and the integrated double-nickel sheet terminal plays such a role, ensuring that the current can stably flow between different components and that the signal can be accurately transmitted.

[0091] The integrated double-nickel sheet terminal of the above embodiments of the utility model has two nickel sheets arranged in an upper-lower manner, compared with the two single-nickel sheet terminal mode of the prior art, the two nickel sheet terminals need to be arranged in parallel, the integrated double-nickel sheet terminal reduces the area occupied by the nickel sheet, and thus the board area B Figure 4 (shaded portion) 22 will be relatively large, and the wiring will be more flexible, please refer to Figure 4 . Secondly, due to the saving of the area occupied by the nickel sheet, the circuit board area is increased, the wiring is more flexible, the placement of components is more reasonable, the area occupied by the components can be reduced, and thus the reinforcing plate area can be reduced, and the process cost is reduced. In addition, compared with the existing two single-nickel sheets, which require two times of patching process, the integrated double-nickel sheet terminal only needs one time of patching process, simplifying the process steps.

[0092] In an embodiment, the upper nickel sheet part 41 comprises, in sequence: an upper pad 411, a top nickel sheet 412, and an upper extension nickel sheet 413, please refer to Figure 3 . The top nickel sheet 412 is located above the insulating part 42, the upper pad 411 serves as one connecting end of the upper nickel sheet part, and the upper extension nickel sheet 413 serves as the other connecting end of the upper nickel sheet part.

[0093] The lower nickel sheet part comprises, in sequence: a lower pad 431, a bottom nickel sheet 432, and a lower extension nickel sheet 433, please refer to Figure 3 . The bottom nickel sheet 432 is located below the insulating part 42, the lower pad 431 serves as one connecting end of the lower nickel sheet part, and the lower extension nickel sheet 433 serves as the other connecting end of the lower nickel sheet part.

[0094] In an embodiment, please refer to Figure 5The upper layer pad 411 and the lower layer pad 431 are located on different sides of the insulation part 42. The upper layer extended nickel piece 413 and the lower layer extended nickel piece 433 are located on the same side of the insulation part 42; and the upper layer extended nickel piece 413 and the lower layer extended nickel piece 433 are located on different sides of the insulation part 42 from the upper layer pad 411 and the lower layer pad 431.

[0095] In an embodiment, please refer to Figure 6 The upper layer pad and the lower layer pad are located on the same horizontal plane; and the horizontal plane on which the upper layer pad and the lower layer pad are located is lower than the bottom of the insulation part. The upper layer extended nickel piece and the lower layer extended nickel piece are located on the same horizontal plane. First, the two connection ends of the two layer nickel piece parts are located on the same horizontal plane, which facilitates the connection of the terminal and the circuit; second, the upper layer extended nickel piece and the lower layer extended nickel piece are located on the same horizontal plane, which will inevitably have a bending part that is close to the plane of the other extended nickel piece. Since the bending part is located on the side of the insulation part, it can play a certain buffering role when the components connected by the terminal (such as the module in the battery system) shake left and right.

[0096] Figure 6 In the embodiment, the upper layer extended nickel piece is close to the plane of the lower layer extended nickel piece, and the lower layer extended nickel piece is also close to the bottom in this embodiment. In different embodiments, the lower layer extended nickel piece can also be on the same plane as the bottom layer nickel piece and not close to the bottom; or the upper layer extended nickel piece can be downward and the lower layer nickel piece can be upward, both of which are close to the middle plane; or the lower layer extended nickel piece can be close to the plane of the upper layer extended nickel piece, and the upper layer extended nickel piece can be on the same plane as the top layer nickel piece.

[0097] The upper layer pad and the top layer nickel piece are not on the same plane, and the two parts can be connected by a bending part, please refer to Figure 3 The lower layer pad and the bottom layer nickel piece are not on the same plane, and the two parts can be connected by a bending part.

[0098] Preferably, the horizontal plane on which the upper layer extended nickel piece and the lower layer extended nickel piece are located is different from the horizontal plane on which the upper layer pad and the lower layer pad are located, please refer to Figure 6 The horizontal planes on which the two connection ends are located are different in height, which facilitates the connection of the terminal and the circuit; Figure 6 In the embodiment, one end of the terminal is connected to the circuit board 2 and the other end is connected to the conductive connecting piece 3. The horizontal planes on which the two connection ends are located are different, so the circuit board and the conductive connecting piece are also located on different horizontal planes, which provides convenience for the selection of the circuit board and the conductive connecting piece. They do not necessarily have to be of the same thickness.

[0099] Figure 5Taking an example where the horizontal plane of the upper and lower extended nickel sheets is lower than the horizontal plane of the upper and lower pads, a thicker circuit board is permissible (either the circuit board itself is thicker or a reinforcing plate is provided). In different embodiments, the horizontal plane of the upper and lower extended nickel sheets may be higher than the horizontal plane of the upper and lower pads, allowing for a thicker conductive connector.

[0100] Of course, in different embodiments, the horizontal plane on which the upper and lower extended nickel sheets are located may also be the same as the plane on which the upper and lower pads are located.

[0101] In one implementation method, please refer to Figure 7 The insulating portion includes at least four sides; the upper nickel sheet portion 41 is connected to the insulating portion via an upper snap-fit ​​5, the upper snap-fit ​​5 being located on opposite sides of the insulating portion; the lower nickel sheet portion 43 is connected to the insulating portion via a lower snap-fit ​​61, the lower snap-fit ​​61 being located at the bottom of the insulating portion. Please refer to... Figure 3 , Figure 7 The upper buckle 5 includes two parts: a first protrusion 51 and a first hole 52, and the lower buckle 61 includes two parts: a second protrusion 611 and a second hole 612; the shape of the hole corresponds to the shape of the protrusion, and the two are engaged.

[0102] In one embodiment, the first hole 52 can be disposed on the bend between the upper pad and the top nickel sheet, please refer to [reference needed]. Figure 3 .

[0103] Figure 7 , Figure 3 In one example, a protrusion is provided on the insulating portion 42, and a hole is provided on the upper nickel sheet portion 41 and the lower nickel sheet portion 43. In other embodiments, the protrusion may be provided on the upper nickel sheet portion 41 and the lower nickel sheet portion 43, and the hole may be provided on the insulating portion.

[0104] In one embodiment, please refer to Figure 7 , Figure 3 The lower nickel sheet portion 43 is also connected to the insulating portion 42 via a lower retaining groove 62, which is located on opposite sides of the insulating portion where the upper retaining clip is located. The lower retaining groove 62 comprises two parts: a groove 621 and a protrusion 622, which engage with each other. Figure 3 As shown, when installing the lower nickel sheet, it can be installed from left to right in the direction of the arrow. The protrusion enters the slot from the left and moves to the right along the slot until the lower clip is engaged.

[0105] Figure 7 , Figure 3 In this example, a bump is provided in the lower nickel sheet portion 43, and a groove is provided in the insulating portion 42. In other embodiments, the bump may be provided in the insulating portion, and the groove may be provided in the lower nickel sheet portion.

[0106] Figure 7 、 Figure 3 In the above, the upper layer buckle occupies a part of the length of the side of the insulation part, the lower layer buckle 62 occupies another part of the length of the side of the insulation part, and the lower layer buckle is closer to the upper layer extension nickel piece and the lower layer extension nickel piece than the upper layer buckle, for example, so that the insulation part can be relatively thin.

[0107] In an embodiment, the number of upper layer pads 411 is two, and the two upper layer pads 411 are respectively located on opposite sides of the insulation part where the upper layer buckle is located, please refer to Figure 4 When the double nickel piece terminal is connected to the circuit, two pads can be selected to be connected, and when both pads are connected, the connection at the pad is more stable; or, according to the needs of circuit layout, one suitable pad can be selected for connection.

[0108] In different embodiments, the number of upper layer pads 411 can also be one, and the upper layer pad is arranged on one side of the insulation part where the upper layer buckle is located.

[0109] Preferably, the length of the upper layer pad is less than the length of the side of the insulation part where it is located; the side of the insulation part where the upper layer extension nickel piece and the lower layer extension nickel piece are located is different from the side where the upper layer buckle is located, please refer to Figure 4 .

[0110] In the prior art, the pad area of the single nickel piece terminal is relatively large, the bottom of the nickel piece cannot be wired, and the circuit layout is complex; and the pad areas 12 of the two single nickel piece terminals need to be arranged separately, and the pad area will be relatively large, as shown in Figure 1 In the above embodiment of the utility model, the length of the upper layer pad is less than the length of the side of the insulation part where it is located, that is, it only occupies a part of the length of the side of the insulation part, the pad area is relatively small, the bottom of the nickel piece terminal can be wired 7, as shown in Figure 8 , which is more convenient for layout; and without the help of jumper resistance, the process cost is further saved.

[0111] In an embodiment, one side of the top of the insulation part is further provided with a limiting protrusion 421, please refer to Figure 3 The side where the limiting protrusion 421 is located is opposite to the side where the upper layer extension nickel piece and the lower layer extension nickel piece are located, and the upper layer nickel piece part is installed on the inner side of the limiting protrusion. The limiting protrusion 421 is used to limit the relative sliding between the upper layer nickel piece part and the insulation part, so that the connection between the upper layer nickel piece part and the insulation part is more stable.

[0112] In an embodiment, a spring piece 422 is further arranged between the upper layer nickel piece part and the insulation part, please refer to Figure 3 The arrangement of the spring piece converts rigid connection into flexible contact, which improves the anti-vibration performance while ensuring the structural strength.

[0113] In this embodiment, the spring is disposed on the insulating part and is U-shaped. In different embodiments, the spring may also be disposed on the upper nickel sheet part, and its shape may be set differently as needed.

[0114] In one embodiment, a battery management system is also provided, comprising: a conductive connector, a circuit board, and an integrated dual-nickel strip terminal as described in any of the above embodiments. Please refer to [reference needed]. Figure 7 .

[0115] The upper nickel sheet section has conductive connectors and a circuit board at both ends, respectively; the lower nickel sheet section has conductive connectors and a circuit board at both ends, and a reliable connection between the two lines between the conductive connectors and the circuit board is achieved through a double nickel sheet terminal.

[0116] Kelvin connection is achieved by setting a dual-nickel-plate terminal on each of the positive and negative terminals. One pair of wires is used to introduce the excitation current into the integrated dual-nickel-plate terminal, allowing the current to flow through the terminal and its connected circuit. These two wires are mainly responsible for providing the drive current and allowing the current to flow in the loop. The other pair of wires is specifically used to measure the voltage across the integrated dual-nickel-plate terminal. Because the voltmeter has a very high input impedance, almost no current flows through this pair of wires, thus accurately measuring the true voltage drop across the terminal, unaffected by the resistance of the connecting wires or contact resistance. These two pairs of wires can be used to measure the connection resistance or internal resistance of the battery pack. The integrated dual-nickel-plate terminal achieves Kelvin connection, allowing for accurate acquisition of resistance values, which helps in assessing battery condition and predicting battery life.

[0117] In one embodiment, the circuit board can be an FPC or a PCB. The integrated nickel-plated terminal can be soldered onto the circuit board in a surface mount manner, with the pads of the integrated nickel-plated terminal connected to the top layer of the circuit board.

[0118] In one embodiment, the conductive connector can be an aluminum electrode. In other embodiments, it can also be a copper electrode, a copper-aluminum composite electrode, or other conductive materials. The connection between the integrated double nickel-plated terminal and the conductive connector can be laser welding.

[0119] In the description of this specification, the references to terms such as "an embodiment," "an example," "a specific implementation process," and "an example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0120] In another embodiment, the integrated double-nickel piece terminal can also be used in high-precision electronic measuring equipment, such as internal circuits of electronic multimeters, oscilloscopes and the like, and the integrated double-nickel piece terminal is connected by using Kelvin connection method, so that the accuracy and stability of the measuring signal can be ensured, and the measuring precision of the equipment is improved.

[0121] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An integrated dual nickel tab terminal, characterized by, The upper layer nickel sheet part, the insulation part and the lower layer nickel sheet part are sequentially arranged. The upper layer nickel sheet part and the lower layer nickel sheet part are respectively connected to the insulation part, and the upper layer nickel sheet part and the lower layer nickel sheet part are electrically isolated by the insulation part. The upper layer nickel sheet part and the lower layer nickel sheet part each include two connection ends.

2. The one-piece dual nickel tab terminal of claim 1, wherein, The upper layer nickel sheet part includes an upper layer pad, a top layer nickel sheet and an upper layer extended nickel sheet which are sequentially connected. The lower layer nickel sheet part includes a lower layer pad, a bottom layer nickel sheet and a lower layer extended nickel sheet which are sequentially connected.

3. The one-piece dual nickel tab terminal of claim 2, wherein, The upper layer pad and the lower layer pad are located on different sides of the insulation part. The upper layer extended nickel sheet and the lower layer extended nickel sheet are located on the same side of the insulation part, and the upper layer extended nickel sheet and the lower layer extended nickel sheet are located on different sides of the upper layer pad and the lower layer pad.

4. The one-piece dual nickel tab terminal of claim 3, wherein, The upper layer pad and the lower layer pad are located on the same horizontal plane, and the horizontal plane on which the upper layer pad and the lower layer pad are located is lower than the bottom of the insulation part. The upper layer extended nickel sheet and the lower layer extended nickel sheet are located on the same horizontal plane.

5. The one-piece dual nickel tab terminal of claim 4, wherein, The horizontal plane on which the upper layer extended nickel sheet and the lower layer extended nickel sheet are located is different from the horizontal plane on which the upper layer pad and the lower layer pad are located.

6. The one-piece dual nickel tab terminal of any one of claims 3 to 5, wherein, The insulation part includes four side surfaces. The upper layer nickel sheet part is connected to the insulation part through an upper layer buckle, and the upper layer buckle is located on opposite sides of the insulation part. The lower layer nickel sheet part is connected to the insulation part through a lower layer buckle, and the lower layer buckle is located on the bottom of the insulation part.

7. The one-piece dual nickel tab terminal of claim 6, wherein, The upper layer pad is located on one side or both sides of the insulation part on which the upper layer buckle is located, and the length of the upper layer pad is less than the length of the side of the insulation part on which the upper layer pad is located. The side of the insulation part on which the upper layer extended nickel sheet and the lower layer extended nickel sheet are located is different from the side on which the upper layer buckle is located.

8. The one-piece dual nickel tab terminal of claim 6, wherein, The lower layer nickel sheet part is also connected to the insulation part through a lower layer buckle slot, and the lower layer buckle slot is located on opposite sides of the insulation part on which the upper layer buckle is located.

9. The one-piece dual nickel tab terminal of claim 6, wherein, A spring sheet is arranged between the upper layer nickel sheet part and the insulation part.

10. A battery management system, characterized by, The conductive connecting piece, the circuit board and the integrated double nickel sheet terminal according to any one of claims 1 to 9 are included. Two ends of the upper layer nickel sheet part of the integrated double nickel sheet terminal are respectively connected to the conductive connecting piece and the circuit board. Two ends of the lower layer nickel sheet part of the integrated double nickel sheet terminal are respectively connected to the conductive connecting piece and the circuit board. ​

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