Voltage acquisition device and battery pack

Abstract

The utility model provides a voltage acquisition device and a battery pack. The voltage acquisition device comprises a plurality of adapter nickel sheets, a plurality of overcurrent thin plates and an FDC acquisition mainboard. A plurality of bent convex parts are formed on one surface of each overcurrent thin plate, and each bent convex part is used for abutting against an electrode of the corresponding cylindrical battery cell. The periphery of one end of the FDC acquisition mainboard is provided with a plurality of diversion parts, one end of each switching nickel sheet is welded to the corresponding diversion part in a patch mode, and the other end of each switching nickel sheet is welded to the face, away from the bent convex part, of the corresponding overcurrent thin plate in a patch mode. The FDC acquisition main board is adopted to replace a traditional wiring harness flat cable, and the FDC acquisition main board and the diversion part can be lighter and lighter and are designed in light weight. By means of the patch welding mode, the welding positions of one end of the transfer nickel piece and the flow guide part and the welding positions of the other end of the transfer nickel piece and the face, deviating from the bent convex part, of the flow passing thin plate are thinner, more stable and more reliable, automatic welding equipment can be conveniently used for welding, and therefore the welding efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack production, in particular to a voltage acquisition device and a battery pack. Background Art

[0002] During the assembly and production process of the battery pack, it is usually assembled in series by connecting multiple square cells or cylindrical cells. The traditional way of connecting multiple cells in series is to use a wiring harness to collect voltage, but this method easily causes the tangled wiring of the wiring harness inside the battery pack and the low efficiency of manual welding, which is not conducive to improving the assembly efficiency and product quality of the battery pack. In order to solve the above technical problems, such as the Chinese patent document CN215377483U, an energy storage battery module integrated circuit board is disclosed, including an integrated wiring harness board, a plurality of welding pole pieces are installed on the integrated wiring harness board, and a wiring harness connection terminal is connected to the integrated wiring harness board. The above technical solution proposes an energy storage battery module integrated circuit board, which can meet the requirements of battery module welding, integrate the wiring harness and welding pole piece into one, improve the welding processing efficiency of the battery module, improve product quality, and can effectively reduce product development costs and improve production efficiency.

[0003] However, the technical solution disclosed in the above patent still has the following problems: the integrated wiring harness board and the welding pole piece are connected by rivets, and at the same time, in order to ensure effective current flow capacity, it is easy to increase the thickness of the connection position or the welding position, making the structure of the integrated wiring harness board relatively thick, which is not conducive to the lightweight design of the integrated wiring harness board and improving the welding efficiency of the integrated wiring harness board. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a voltage acquisition device and a battery pack that can improve the efficiency of automated welding and have a more lightweight design.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A voltage collection device, comprising:

[0007] Multiple transfer nickel sheets;

[0008] A plurality of flow-through thin plates, each of which has a plurality of bent convex portions formed on one side thereof, each of which is used to abut against an electrode of a corresponding cylindrical battery cell;

[0009] FDC collection main board, a plurality of guide parts are arranged on the periphery of one end of the FDC collection main board, one end of each of the transfer nickel sheets is patch welded to the corresponding guide part, and the other end of each of the transfer nickel sheets is patch welded to the side of the corresponding flow-through thin plate away from the bending convex part.

[0010] In one embodiment, the thickness of each of the transition nickel sheets is less than 0.05 mm; and / or,

[0011] The thickness of each of the flow-through thin plates is less than 0.3 mm; the thickness of the FDC collection main board is less than 0.5 mm.

[0012] In one embodiment, each of the transfer nickel sheets, each of the flow-through thin plates and the FDC collection main board are all integrally formed structures.

[0013] In one embodiment, each of the bent protrusions protrudes from a side of the flow-through plate that is away from the corresponding transition nickel sheet; and / or,

[0014] A wiring harness connection portion is formed at the other end of the FDC acquisition main board, and the wiring harness connection portion is used to connect with the voltage acquisition wiring harness.

[0015] In one of the embodiments, a plurality of first positioning holes are formed at the other end of the FDC acquisition mainboard, and each of the first positioning holes is used to be sleeved on a positioning column of a battery module.

[0016] A battery pack, comprising any of the voltage collection devices described above, wherein the battery pack further comprises an upper shell cover, a barrel and a battery module;

[0017] The upper shell cover is disposed on the top of the battery module and is screwed to the cylinder. A plurality of cylindrical battery cells are disposed inside the battery module. The battery module is installed inside the cylinder. A plurality of positioning posts are disposed on the outside of the battery module. Each positioning post is passed through the corresponding first positioning hole.

[0018] In one embodiment, the battery pack further includes a power harness group and a charging device, one end of the power harness group is electrically connected to the power end of the battery module and the BMS control board, one end of the power harness group is plugged into one end of the charging device, and the other end of the charging device is provided with a charging port;

[0019] A mounting hole is provided at the bottom of the cylinder, and the charging device is arranged in the mounting hole.

[0020] In one embodiment, the battery pack further includes an insulating partition having a plurality of second positioning holes, each of the second positioning holes being arranged corresponding to the corresponding first positioning hole, so that each of the positioning columns is sequentially passed through the corresponding first positioning hole and the corresponding second positioning hole.

[0021] In one embodiment, the battery pack further includes a wiring bracket body, which is located on a side of the insulating partition away from the battery module, and the wiring bracket body is provided with a limiting slot, and the power wiring harness group partially passes through the limiting slot.

[0022] In one embodiment, the upper shell cover includes a U-shaped handle, and both ends of the U-shaped handle are rotatably connected to the upper shell cover.

[0023] Compared with the prior art, the utility model has at least the following advantages:

[0024] 1. The FDC acquisition motherboard replaces the traditional wiring harness, and at the same time makes the FDC acquisition motherboard and the guide part more thin and lightweight.

[0025] 2. The use of patch welding can make the welding position between one end of the transfer nickel sheet and the guide part, and the other end of the transfer nickel sheet and the side of the current-passing thin plate away from the bent convex part thinner, more stable and reliable, so as to facilitate the use of automated welding equipment for welding, thereby helping to improve the efficiency of automated welding of the FDC acquisition motherboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 This is a schematic diagram of the structure of a voltage acquisition device in one embodiment;

[0028] Figure 2 It is a partial exploded schematic diagram of the structure of a battery pack in another embodiment;

[0029] Figure 3 for Figure 2 A schematic diagram of the structure of a battery module of the battery pack shown;

[0030] Figure 4 for Figure 2 The structural explosion diagram of the battery pack shown;

[0031] Figure 5 for Figure 2 Schematic diagram of the partial structure explosion of the battery pack shown. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central 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 a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] The present disclosure provides a voltage collection device, comprising a plurality of nickel transfer sheets, a plurality of current-carrying thin plates and an FDC collection main board. A plurality of bending convex portions are formed on one side of each of the current-carrying thin plates, and each of the bending convex portions abuts against the electrodes of the corresponding cylindrical battery cells. A plurality of guide portions are provided on the periphery of one end of the FDC collection main board, and one end of each of the nickel transfer sheets is patch-welded to the corresponding guide portion, and the other end of each of the nickel transfer sheets is patch-welded to the side of the corresponding current-carrying thin plate away from the bending convex portion.

[0036] See also Figures 1 to 3 In order to better understand the voltage collection device 10 of the present application, the voltage collection device 10 is further explained below:

[0037] The voltage collection device 10 of one embodiment includes a plurality of nickel transfer sheets 100, a plurality of flow-through thin plates 200 and an FDC collection main board 300. A plurality of bending convex portions 210 are formed on one side of each of the flow-through thin plates 200, and each of the bending convex portions 210 abuts against the electrodes of the corresponding cylindrical battery cells 610. A plurality of guide portions 310 are provided on the periphery of one end of the FDC collection main board 300, and one end of each of the nickel transfer sheets 100 is patch welded to the corresponding guide portion 310, and the other end of each of the nickel transfer sheets 100 is patch welded to the side of the corresponding flow-through thin plate 200 away from the bending convex portion 210.

[0038] In this embodiment, the FDC acquisition mainboard 300 is used to replace the traditional wiring harness, and at the same time, the FDC acquisition mainboard 300 and the guide part 310 can be designed to be thinner and lighter.

[0039] Furthermore, the use of patch welding can make the welding positions between one end of the transition nickel sheet 100 and the guide portion 310, and between the other end of the transition nickel sheet 100 and the side of the current-passing thin plate 200 away from the bending protrusion 210 thinner, more stable and reliable, so as to facilitate welding using automated welding equipment, thereby helping to improve the efficiency of automated welding of the FDC acquisition mainboard 300.

[0040] It should be noted that the FDC circuit board is a special type of PCB circuit board. In this embodiment, the FDC acquisition main board 300 is an FDC circuit board. Specifically, the FDC acquisition main board 300 has high flexibility and bending performance, and can adapt to complex bending and bending shapes. That is to say, the FDC acquisition main board 300 can be applied to the narrow space structure inside the battery pack 20, so it is more flexible in the structure with large space restrictions.

[0041] like Figure 1 and Figure 2 As shown, in one embodiment, the thickness of each of the transfer nickel sheets 100 is less than 0.05 mm. In one embodiment, the thickness of each of the flow thin plates 200 is less than 0.3 mm. The thickness of the FDC collection main board 300 is less than 0.5 mm. In one embodiment, each of the transfer nickel sheets 100, each of the flow thin plates 200 and the FDC collection main board 300 are all integrally formed structures. It can be understood that the transfer nickel sheets 100, the flow thin plates 200 and the FDC collection main board 300 are all integrally formed structures, so that the transfer nickel sheets 100, the flow thin plates 200 and the FDC collection main board 300 have better structural strength and can also improve their manufacturability. Among them, the transition nickel sheet 100, the current-passing thin plate 200 and the FDC collection mainboard 300 can ensure normal use while also compressing the structural thickness of the transition nickel sheet 100, the current-passing thin plate 200 and the FDC collection mainboard 300, thereby reducing the occupancy of the internal space of the battery pack 20, thereby effectively improving the utilization rate of the internal space structure of the battery pack 20.

[0042] It should be noted that the thin sheet structure of the transfer nickel sheet 100, the current-carrying thin plate 200 and the FDC acquisition main board 300 is conducive to batch welding by automated equipment, and can effectively improve the efficiency of automated welding of the FDC acquisition main board 300.

[0043] like Figure 1 and Figure 3As shown, in one embodiment, each of the bent protrusions 210 protrudes from the side of the current-passing thin plate 200 away from the corresponding transition nickel sheet 100. It can be understood that the bent protrusions 210 contact the electrodes of the cylindrical battery cell 610 to ensure that the current in the cylindrical battery cell 610 can be conducted to the current-passing thin plate 200.

[0044] It can be understood that in other embodiments, each of the bent protrusions 210 is welded to the electrodes of the corresponding cylindrical battery cell 610. Specifically, the bent protrusions 210 can be welded to the electrodes of the cylindrical battery cell 610 by resistance welding or laser welding, so as to achieve the diversity of processability, facilitate the application of automated welding equipment, thereby facilitating the improvement of the welding efficiency of automated equipment, and also ensuring the stability of the connection between the bent protrusions 210 and the electrodes of the cylindrical battery cell 610.

[0045] In one embodiment, the other end of the FDC acquisition main board 300 is formed with a harness connection portion 320, and the harness connection portion 320 is used to connect with the voltage acquisition harness. It can be understood that one end of the FDC acquisition main board 300 is transmitted to the other end of the FDC acquisition main board 300 through the integrated current, and is collected to the voltage acquisition harness through the harness connection portion 320.

[0046] like Figure 1 and Figure 3 As shown, in one embodiment, a plurality of first positioning holes 301 are provided at the other end of the FDC acquisition mainboard 300, and each of the first positioning holes 301 is used to be sleeved on the positioning column 620 of the battery module 600. It can be understood that the first positioning holes 301 can be limited by the positioning column 620, thereby ensuring the accuracy of the installation position of the FDC acquisition mainboard 300.

[0047] See also Figures 1 to 5 , the present application also provides a battery pack 20, comprising the voltage collection device 10 described in any of the above embodiments, the battery pack 20 further comprising an upper shell cover 400, a barrel 500 and a battery module 600;

[0048] The upper shell cover 400 is covered on the top of the battery module 600 and is screwed to the cylinder 500. A plurality of cylindrical battery cells 610 are provided inside the battery module 600. The battery module 600 is installed inside the cylinder 500. A plurality of positioning posts 620 are provided on the outside of the battery module 600. Each positioning post 620 is passed through the corresponding first positioning hole 301.

[0049] In this embodiment, the battery module 600 is installed inside the cylinder 500, and then the upper shell cover 400 is covered on the top of the battery module 600 and connected to the cylinder 500 with screws to ensure the stability of the installation of the battery module 600; wherein each positioning column 620 is passed through the corresponding first positioning hole 301, thereby effectively and reliably limiting the installation of the FDC acquisition mainboard 300.

[0050] It can be understood that in other embodiments, after the upper shell cover 400 is placed on the top of the battery module 600 and is screwed to the cylinder 500, waterproof glue will be filled in the grooves along the periphery of the connection position between the upper shell cover 400 and the cylinder 500, thereby improving the sealing and waterproof performance of the battery pack 20.

[0051] like Figures 2 to 5 As shown, in one embodiment, the battery pack 20 further includes a power harness group 700 and a charging device 800, one end of the power harness group 700 is electrically connected to the power end of the battery module 600 and the BMS control board, one end of the power harness group 700 is plugged with one end of the charging device 800, and the other end of the charging device 800 is provided with a charging port 801. The bottom of the barrel 500 is provided with a mounting hole 501, and the charging device 800 is arranged in the mounting hole 501. It can be understood that by plugging one end of the power harness group 700 with one end of the charging device 800, the charging device 800 can be removed separately. It can be understood that in other embodiments, the charging device 800 is arranged in the mounting hole 501 and is screwed with the barrel 500. When the charging port 801 is worn out and the charging device 800 needs to be replaced in time, one end of the charging device 800 can be disconnected from one end of the power harness assembly 700 and the locking screw can be unscrewed from the barrel 500, thereby realizing convenient replacement of the charging device 800.

[0052] like Figure 1 and Figure 5 As shown, in one embodiment, the battery pack 20 further includes an insulating partition 900, and the insulating partition 900 is provided with a plurality of second positioning holes 901, and each of the second positioning holes 901 is arranged corresponding to the corresponding first positioning hole 301, so that each of the positioning posts 620 is sequentially inserted into the corresponding first positioning hole 301 and the corresponding second positioning hole 901. It can be understood that each of the positioning posts 620 is sequentially inserted into the corresponding first positioning hole 301 and the corresponding second positioning hole 901, so that one side of the insulating partition 900 is attached to the side of the transfer nickel sheet 100, the flow sheet 200 and the FDC collection main board 300 away from the battery module 600, effectively avoiding the transfer nickel sheet 100, the flow sheet 200 and the FDC collection main board 300 from contacting the inner wall of the cylinder 500, thereby causing leakage problems.

[0053] It should be noted that if Figure 3 and Figure 4 As shown, in this embodiment, the number of insulating partitions 900 is two, which are symmetrically arranged on both sides of the battery module 600 with the battery module 600 as the center line; similarly, the number of voltage collection devices 10 is two, which are symmetrically arranged on both sides of the battery module 600 with the battery module 600 as the center line.

[0054] like Figure 3 and Figure 4 As shown, in one embodiment, the battery pack 20 further includes a wiring bracket body 1000, the wiring bracket body 1000 is located on the side of the insulating partition 900 away from the battery module 600, and the wiring bracket body 1000 is provided with a limiting slot 1001, and the power harness group 700 partially passes through the limiting slot 1001. It can be understood that the limiting slot 1001 of the wiring bracket body 1000 can limit the routing of the power harness group 700, ensure the rationality of the routing of the power harness group 700, and improve the utilization rate of the internal space structure of the battery pack 20.

[0055] like Figure 2 As shown, in one embodiment, the upper housing cover 400 includes a U-shaped handle 410, and both ends of the U-shaped handle 410 are rotatably connected to the upper housing cover 400. It can be understood that the U-shaped handle 410 is convenient for users to hold and transport the battery pack 20.

[0056] Compared with the prior art, the utility model has at least the following advantages:

[0057] 1. The FDC acquisition motherboard replaces the traditional wiring harness, and at the same time makes the FDC acquisition motherboard and the guide part more thin and lightweight.

[0058] 2. The use of patch welding can make the welding position between one end of the transfer nickel sheet and the guide part, and the other end of the transfer nickel sheet and the side of the current-passing thin plate away from the bent convex part thinner, more stable and reliable, so as to facilitate the use of automated welding equipment for welding, thereby helping to improve the efficiency of automated welding of the FDC acquisition motherboard.

[0059] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A voltage collection device, characterized in that: include: Multiple transfer nickel sheets; A plurality of flow-through thin plates, each of which has a plurality of bent convex portions formed on one side thereof, each of which is used to abut against an electrode of a corresponding cylindrical battery cell; FDC collection main board, a plurality of guide parts are arranged on the periphery of one end of the FDC collection main board, one end of each of the transfer nickel sheets is patch welded to the corresponding guide part, and the other end of each of the transfer nickel sheets is patch welded to the side of the corresponding flow-through thin plate away from the bending convex part.

2. The voltage acquisition device according to claim 1, characterized in that: The thickness of each of the transition nickel sheets is less than 0.05 mm; and / or, The thickness of each of the flow-through thin plates is less than 0.3 mm; the thickness of the FDC collection main board is less than 0.5 mm.

3. The voltage acquisition device according to claim 1, characterized in that: Each of the transfer nickel sheets, each of the flow-through thin plates and the FDC collection main board are all integrally formed structures.

4. The voltage acquisition device according to claim 1, characterized in that: Each of the bent protrusions protrudes from a side of the current-carrying thin plate that is away from the corresponding transfer nickel sheet; and / or, A wiring harness connection portion is formed at the other end of the FDC acquisition main board, and the wiring harness connection portion is used to connect with the voltage acquisition wiring harness.

5. The voltage acquisition device according to claim 1, characterized in that: The other end of the FDC acquisition mainboard is provided with a plurality of first positioning holes, each of which is used to be sleeved on a positioning column of a battery module.

6. A battery pack, characterized in that: The voltage collection device according to any one of claims 1 to 5, wherein the battery pack further comprises an upper shell cover, a barrel and a battery module; The upper shell cover is disposed on the top of the battery module and is screwed to the cylinder. A plurality of cylindrical battery cells are disposed inside the battery module. The battery module is installed inside the cylinder. A plurality of positioning posts are disposed on the outside of the battery module. Each positioning post is passed through the corresponding first positioning hole.

7. The battery pack according to claim 6, characterized in that: The battery pack further includes a power harness group and a charging device, one end of the power harness group is electrically connected to the power end of the battery module and the BMS control board, one end of the power harness group is plugged into one end of the charging device, and the other end of the charging device is provided with a charging port; A mounting hole is provided at the bottom of the cylinder, and the charging device is arranged in the mounting hole.

8. The battery pack according to claim 7, characterized in that: The battery pack further includes an insulating partition having a plurality of second positioning holes, each of the second positioning holes being arranged corresponding to a corresponding first positioning hole, so that each of the positioning posts is sequentially passed through a corresponding first positioning hole and a corresponding second positioning hole.

9. The battery pack according to claim 8, characterized in that: The battery pack further comprises a wiring bracket body, which is located on a side of the insulating partition away from the battery module, and the wiring bracket body is provided with a limiting slot, through which the power harness group partially passes.

10. The battery pack according to claim 6, characterized in that: The upper shell cover comprises a U-shaped handle piece, and both ends of the U-shaped handle piece are rotatably connected to the upper shell cover.

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