Signal acquisition assembly and integrated busbar

Abstract

The utility model provides a signal acquisition assembly and an integrated busbar, relates to the technical field of batteries, and aims to solve the problem that the two ends of the signal acquisition assembly and the busbar are easy to drastically pull to cause breakage due to expansion of a battery cell in the working process, and the signal acquisition assembly comprises a signal acquisition body, the end part of the signal acquisition body is provided with a concentric-square-shaped structure, the concentric-square-shaped structure comprises a buffer part and a connecting part which are connected with each other, the buffer part is connected with the signal acquisition body, and the connecting part is used for being connected with the busbar; one of the buffer part and the connecting part extends towards the direction close to the middle part of the signal acquisition body, and the other one extends towards the direction away from the middle part of the signal acquisition body.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular to a signal acquisition component and an integrated busbar. Background Art

[0002] During normal use of the battery module (i.e., in a charging state or a power supply state), the battery module will expand. When the battery expands, the gap between the bus bars will also expand. Since the multiple battery cells inside the battery module generally expand from the middle to both sides, the distance between the bus bars will change, causing a large amount of pulling at the connection between the two ends of the signal acquisition component and the bus bar, thereby reducing the service life of the signal acquisition component. Utility Model Content

[0003] In view of this, the present application provides a signal acquisition component and an integrated busbar to improve the problem that due to the expansion of the battery cell during operation, the two ends of the signal acquisition component and the busbar are easily pulled sharply and broken.

[0004] The technical solution adopted by this application to solve the above technical problems is:

[0005] In a first aspect, the present application provides a signal acquisition component, comprising a signal acquisition body, a meandering structure being provided at the end of the signal acquisition body, the meandering structure comprising a buffer portion and a connecting portion connected to each other, the buffer portion being connected to the signal acquisition body, the connecting portion being used to connect to a bus, one of the buffer portion and the connecting portion extending in a direction approaching the middle portion of the signal acquisition body, and the other extending in a direction away from the middle portion of the signal acquisition body.

[0006] In some embodiments of the present application, the buffer portion and the connecting portion constitute a U-shaped member, the U-shaped member includes a first end and a second end, the first end of the U-shaped member is connected to the signal acquisition body, the second end of the U-shaped member is used to connect to the bus, and the opening of the U-shaped member is away from the middle of the signal acquisition body.

[0007] In some embodiments of the present application, the signal acquisition body is further provided with a plurality of buffer arms, and the plurality of buffer arms are symmetrically arranged along the middle portion of the signal acquisition body, and the buffer arms on one side of the middle portion of the signal acquisition body and the buffer arms on the other side of the middle portion of the signal acquisition body extend in directions diverging from each other.

[0008] In some embodiments of the present application, the buffer arm is an L-shaped piece, which includes a first end and a second end. The first end of the L-shaped piece is connected to the signal acquisition body, and the second end of the L-shaped piece is used to connect to the bus.

[0009] In some embodiments of the present application, the two ends of the signal acquisition body are provided with the meandering structure, and the plurality of buffer arms are located between the meandering structures at the two ends.

[0010] In some embodiments of the present application, the signal acquisition body is provided with end mounting holes, and the end mounting holes are provided at both end portions of the signal acquisition body, and / or;

[0011] The signal collection body is provided with the middle installation hole, and a plurality of the middle installation holes are evenly arranged on the signal collection body along the extension direction of the signal collection body.

[0012] In some embodiments of the present application, the signal acquisition body is provided with multiple mounting parts, the middle mounting hole is provided on the mounting part, the mounting part and the buffer arm are located on the same side of the signal acquisition body, a first gap is formed between the buffer arm and the mounting part, a first pre-connection part is provided in the first gap, and the first pre-connection part connects the mounting part and the buffer arm.

[0013] In some embodiments of the present application, a through hole is provided on at least one side of the middle mounting hole along the extension direction of the signal acquisition body.

[0014] In some embodiments of the present application, the middle mounting hole is a waist-shaped hole, and the extending direction of the waist-shaped hole is along the expansion direction of the battery cell.

[0015] In some embodiments of the present application, the signal acquisition body is provided with multiple mounting parts, the middle mounting hole is arranged on the mounting part, a second gap is formed between the meandering structure and the buffer arm or the mounting part, a second pre-connection part is provided in the second gap, and the second pre-connection part connects the meandering structure and the buffer arm or the mounting part.

[0016] In a second aspect, the present application provides an integrated busbar, comprising a busbar and a signal acquisition component as described in any one of the above items, wherein the connecting portion is connected to the busbar.

[0017] In summary, due to the adoption of the above technical solution, this application has at least the following beneficial effects:

[0018] The present application provides a signal acquisition component and an integrated busbar. A roundabout structure is respectively arranged at both ends of a signal acquisition body. The opening direction of the roundabout structure is toward the middle of the signal acquisition body. When the battery cell expands, the gap between the busbars increases, and the busbar moves away from the middle of the signal acquisition body. Driven by the busbar, the roundabout structure and the signal acquisition body can bend at the connection. In this process, the roundabout structure is pushed to a relaxed state, and the roundabout structure itself can be bent. In this process, although the roundabout structure is stretched out, it is also in a relaxed state, so that the busbar connected to the roundabout structure can produce a large displacement instead of generating a pulling force on the signal acquisition body, thereby reserving sufficient buffering capacity for the large displacement that may be generated by the busbars at both ends of the signal acquisition body, making it difficult for the signal acquisition body and the busbar to be damaged by the pulling force generated by the expansion of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments are briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, but are not intended to limit the present application, wherein:

[0020] Figure 1 A schematic diagram of the structure of the signal acquisition component provided in an embodiment of the present application;

[0021] Figure 2 A front schematic diagram of a signal acquisition component provided in an embodiment of the present application;

[0022] Figure 3 The embodiments of the present application provide Figure 2 An enlarged schematic diagram of part A in FIG.

[0023] Figure 4 The embodiments of the present application provide Figure 2 An enlarged schematic diagram of part B in FIG.

[0024] Figure 5 A schematic diagram of the structure of the integrated busbar provided in an embodiment of the present application.

[0025] The reference numerals are as follows:

[0026] 1. Signal acquisition body; 2. Meander structure; 21. Buffering part; 22. Connecting part; 3. Buffering arm; 4. Mounting part; 41. End mounting hole; 42. Middle mounting hole; 43. Through hole; 5. First gap; 51. First pre-connecting part; 6. Second gap; 61. Second pre-connecting part. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0028] In the description of this application, it should be understood that the words "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description". Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, known structures and processes are not elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles disclosed in this application.

[0030] Electric vehicle power batteries are usually assembled from several single cells in series and parallel to provide the high voltage and large power required to drive electric vehicles. The connection of cells is a key technology for power battery assembly. In traditional battery packs, integrated busbars are usually used to complete the series and parallel connection of battery packs. At the same time, in order to collect cell voltage and cell temperature in real time, temperature sensors and voltage sampling harnesses need to be arranged on the surface of the cell or integrated busbar.

[0031] The integrated busbar is mainly composed of signal acquisition components (FPC, PCB, FFC, etc.), plastic structural parts, copper and aluminum busbars, etc., which are connected into a whole through hot pressing or riveting processes to realize high-voltage series and parallel connection of battery cells, as well as temperature sampling and voltage sampling of battery cells, and provide temperature and voltage to the BMS system through FPC / PCB and connector components.

[0032] Since the multiple cells in the battery module of the signal acquisition component in the prior art are prone to expansion, if no flexible design such as tensile strength is made, the signal acquisition component is easily pulled and damaged due to the increase in the gap between the cells.

[0033] Based on the above signal acquisition components, see Figures 1 to 3 As shown, Figure 1 A schematic diagram of the structure of the signal acquisition component provided in the embodiment of the present application is shown in FIG. Figure 2 A front view of a signal acquisition component provided in an embodiment of the present application, Figure 3 The embodiments of the present application provide Figure 2 The enlarged schematic diagram of part A in the figure shows that the present application provides a signal acquisition component, including a signal acquisition body 1, a meandering structure 2 is provided at the end of the signal acquisition body 1, the meandering structure 2 includes a buffer portion 21 and a connecting portion 22 connected to each other, the buffer portion 21 is connected to the signal acquisition body 1, and the connecting portion 22 is used to connect to the bus, one of the buffer portion 21 and the connecting portion 22 extends in a direction close to the middle of the signal acquisition body 1, and the other extends in a direction away from the middle of the signal acquisition body 1.

[0034] It is understandable that the lengths of the two ends of the meander-shaped structure 2 can be designed differently according to the degree of expansion of the battery cell (or the distance of displacement of the busbar).

[0035] It is understandable that the meandering structure 2 and the busbar are generally welded with tin material, and UV glue may be used to further enhance the connection strength.

[0036] It can be understood that in the embodiments of the present application, the busbar is generally an aluminum busbar or a copper busbar.

[0037] A circular structure 2 is provided at both ends of the signal acquisition body 1. When the battery cell expands, the gap between the bus bars increases, and the bus bars move away from the middle of the signal acquisition body 1. Driven by the bus bars, the connection between the circular structure 2 and the signal acquisition body can bend. In this process, the circular structure 2 is pushed to be in a relaxed state, and the circular structure 2 itself can be bent. In this process, although the circular structure 2 is stretched, it is also in a relaxed state, so that the bus bar connected to the circular structure 2 can produce a large displacement instead of generating a pulling force on the signal acquisition body 1, thereby reserving sufficient buffering capacity for the large displacement of the bus bars at both ends of the signal acquisition body 1, so that it is difficult for the signal acquisition body 1 and the bus bar to be damaged by the pulling force generated by the expansion of the battery cell.

[0038] In some embodiments of the present application, the buffer portion 21 and the connecting portion 22 constitute a U-shaped member, the U-shaped member includes a first end and a second end, the first end of the U-shaped member is connected to the signal acquisition body 1, the second end of the U-shaped member is used to connect to the bus, and the opening of the U-shaped member is away from the middle of the signal acquisition body 1.

[0039] It can be understood that the buffer portion 21 and the connecting portion 22 can form a U-shaped member, or the buffer portion 21 and the connecting portion 22 can form a semi-annular member.

[0040] In some embodiments of this application, see Figure 4 As shown, Figure 4 The embodiments of the present application provide Figure 2 In the enlarged schematic diagram of part B, the signal acquisition body 1 is also provided with a plurality of buffer arms 3, and the plurality of buffer arms 3 are symmetrically arranged along the middle part of the signal acquisition body 1, and the buffer arms 3 on one side of the middle part of the signal acquisition body 1 and the buffer arms 3 on the other side of the middle part of the signal acquisition body 1 extend in directions diverging from each other.

[0041] It can be understood that a plurality of buffer arms 3 are provided on one side edge of the signal acquisition body 1. The buffer arms 3 are L-shaped parts, and the gap formed between the buffer arms 3 and the signal acquisition body 1 faces the middle of the signal acquisition body 1. When the battery cell expands, the gap between the bus bars increases, and the bus bars move away from the middle of the signal acquisition body 1. The battery cells on both sides expand in opposite directions. The plurality of buffer arms 3 symmetrically arranged along the middle of the signal acquisition body 1 can buffer the expansion of the battery cells on both sides respectively. Driven by the bus bar, the buffer arms 3 first bend to buffer the pulling force generated by the displacement of the bus bar, rather than generating a pulling force on the signal acquisition body 1. In this process, the buffer arms 3 are in a relaxed state, so that it is difficult for the signal acquisition body 1 and the bus bar to generate a pulling force due to the expansion of the battery cell, thereby damaging the signal acquisition body 1.

[0042] In some embodiments of the present application, the buffer arm 3 is an L-shaped member, which includes a first end and a second end. The first end of the L-shaped member is connected to the signal acquisition body 1, and the second end of the L-shaped member is used to connect to the bus.

[0043] It can be understood that the buffer arm 3 can be an L-shaped piece, or the buffer arm 3 can be a bent piece.

[0044] In some embodiments of the present application, a meandering structure 2 is provided at both ends of the signal acquisition body 1, and a plurality of buffer arms 3 are located between the meandering structures 2 at both ends.

[0045] Since the expansion force gradually accumulates from the middle to the two ends, the buffer arm 3 in the middle provides a primary buffer for the expansion of the battery cell, and the round structures 2 at the two ends provide a secondary buffer for the expansion of the battery cell. Not only can different buffers be provided for expansion forces of different sizes to meet the buffering requirements of the battery cell, but also the structure of the signal acquisition component can be simplified.

[0046] In some embodiments of this application, see Figure 3 and Figure 4 As shown, the signal acquisition body 1 is provided with end mounting holes 41, and the end mounting holes 41 are provided at both ends of the signal acquisition body 1, and / or;

[0047] The signal collection body 1 is provided with a middle installation hole 42 , and a plurality of middle installation holes 42 are evenly arranged on the signal collection body 1 along the extension direction of the signal collection body 1 .

[0048] It can be understood that the signal acquisition body 1 is provided with end mounting holes 41 and / or multiple middle mounting holes 42. The end mounting holes 41 are arranged at both end portions of the signal acquisition body 1, and the middle mounting holes 42 are evenly arranged on the signal acquisition body 1 along the length direction of the signal acquisition body 1, so that the entire signal acquisition body 1 can be evenly installed on the plastic bracket through the end mounting holes 41 and the middle mounting holes 42.

[0049] In some embodiments of this application, see Figure 4 As shown, the signal acquisition body 1 is provided with a plurality of mounting parts 4, a middle mounting hole 42 is provided on the mounting part 4, the mounting part 4 and the buffer arm 3 are located on the same side of the signal acquisition body 1, a first gap 5 is formed between the buffer arm 3 and the mounting part 4, a first pre-connection part 51 is provided in the first gap 5, and the first pre-connection part 51 connects the mounting part 4 and the buffer arm 3.

[0050] It can be understood that a plurality of mounting parts 4 are integrally provided on one side edge of the signal acquisition body 1, and the middle mounting hole 42 is provided on the mounting part 4. On the one hand, it will not affect the wiring arrangement inside the signal acquisition body 1, and on the other hand, it will not affect the ability of the signal acquisition body 1 to resist pulling, thereby not reducing the ability of the signal acquisition body 1 to resist the expansion of the battery cell.

[0051] It can be understood that the mounting portion 4 and the buffer arm 3 are located on the same side edge of the signal acquisition body 1, so that the width of the signal acquisition component can be limited.

[0052] It is understandable that when the signal acquisition component is in operation, the battery cell expands and the first pre-connection portion 51 breaks during the expansion of the battery cell, thereby allowing the buffer arm 3 to move normally within a preset maximum range. During the installation process, due to the presence of the first pre-connection portion 51, the movement range of the buffer arm 3 is limited relative to the signal acquisition body 1, which makes it easier to pre-position and weld the end of the second end of the buffer arm 3 on the signal acquisition body 1 to the bus.

[0053] In some embodiments of this application, see Figure 4 As shown, a through hole 43 is provided on at least one side of the middle mounting hole 42 along the extension direction of the signal acquisition body 1 .

[0054] It can be understood that the middle mounting hole 42 is provided with through holes 43 on both sides along the length direction of the signal acquisition body 1. When the battery cell expands, the heat rivet column on the plastic bracket first pulls the connection between the through hole 43 and the mounting hole, thereby increasing the activity space of the heat rivet column without damaging the signal acquisition body 1, thereby improving the ability of the signal acquisition component to resist the expansion of the battery cell.

[0055] In some embodiments of this application, Figure 4 As shown, the middle mounting hole 42 is a waist-shaped hole, and the extending direction of the waist-shaped hole is along the expansion direction of the battery core.

[0056] It can be understood that the middle mounting hole 42 is a waist-shaped hole, which can further increase the activity space of the heat-riveted column on the plastic bracket after the three holes are combined into one, thereby further improving the tensile resistance of the signal acquisition component, thereby improving the ability of the signal acquisition component to resist the expansion of the battery cell.

[0057] In some embodiments of this application, see Figure 3 As shown, the signal acquisition body 1 is provided with a plurality of mounting parts 4, a middle mounting hole 42 is provided on the mounting part 4, a second gap 6 is formed between the meandering structure 2 and the buffer arm 3 or the mounting part 4, a second pre-connection part 61 is provided in the second gap 6, and the second pre-connection part 61 connects the meandering structure 2 and the buffer arm 3 or the mounting part 4.

[0058] It can be understood that when the battery cell expands during the operation of the signal acquisition component, the second pre-connection part 61 breaks during the expansion of the battery cell, thereby allowing the meandering structure 2 to move normally within a preset maximum range. During the installation process, due to the presence of the second pre-connection part 61, the movement range of the meandering structure 2 is limited relative to the signal acquisition body 1, which makes it easier to pre-position and weld the end of the second end of the meandering structure 2 on the signal acquisition body 1 to the bus.

[0059] See also Figure 5 As shown, Figure 5 This is a structural schematic diagram of an integrated busbar provided in an embodiment of the present application. The present application provides an integrated busbar, including a signal acquisition component connecting part 22 connected to a busbar as described in any of the above embodiments.

[0060] Since the signal acquisition component in the present application can improve the problem of large-scale pulling and breakage between the two ends of the signal acquisition component and the busbar due to the expansion of the battery cell during operation, the integrated busbar including the signal acquisition component also has the above beneficial effects.

[0061] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0062] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0063] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more application embodiments, in the above description of the embodiments of this application, multiple features are sometimes merged into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0064] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, etc., cited in this application is hereby incorporated by reference in its entirety, except for application history documents that are inconsistent with or conflicting with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or later attached to this application). It should be noted that if the descriptions, definitions, and / or use of terms in the attached materials of this application are inconsistent or conflicting with the content of this application, the descriptions, definitions, and / or use of terms in this application shall prevail.

Claims

1. A signal acquisition component, characterized in that: The invention comprises a signal acquisition body (1), wherein the end of the signal acquisition body (1) is provided with a meandering structure (2), wherein the meandering structure (2) comprises a buffering portion (21) and a connecting portion (22) which are connected to each other, wherein the buffering portion (21) is connected to the signal acquisition body (1), and the connecting portion (22) is used to connect to a bus bar, wherein one of the buffering portion (21) and the connecting portion (22) extends in a direction close to the middle of the signal acquisition body (1), and the other extends in a direction away from the middle of the signal acquisition body (1).

2. The signal acquisition component according to claim 1, characterized in that: The buffer portion (21) and the connecting portion (22) form a U-shaped piece, the U-shaped piece comprising a first end and a second end, the first end of the U-shaped piece being connected to the signal acquisition body (1), the second end of the U-shaped piece being used to be connected to a bus, and the opening of the U-shaped piece being away from the middle of the signal acquisition body (1).

3. The signal acquisition component according to claim 1, characterized in that: The signal acquisition body (1) is further provided with a plurality of buffer arms (3), the plurality of buffer arms (3) being symmetrically arranged along the middle of the signal acquisition body (1), the buffer arms (3) on one side of the middle of the signal acquisition body (1) and the buffer arms (3) on the other side of the middle of the signal acquisition body (1) extending in directions diverging from each other.

4. The signal acquisition component according to claim 3, characterized in that: The buffer arm (3) is an L-shaped piece, comprising a first end and a second end, the first end of the L-shaped piece being connected to the signal collection body (1), and the second end of the L-shaped piece being used to be connected to a bus bar.

5. The signal acquisition component according to claim 3, characterized in that: The two ends of the signal collection body (1) are both provided with the meander-shaped structures (2), and a plurality of the buffer arms (3) are located between the meander-shaped structures (2) at the two ends.

6. The signal acquisition component according to claim 3, characterized in that: The signal collection body (1) is provided with end mounting holes (41), and the end mounting holes (41) are arranged at both end portions of the signal collection body (1), and / or; The signal collection body (1) is provided with a central mounting hole (42), and a plurality of the central mounting holes (42) are evenly arranged on the signal collection body (1) along the extension direction of the signal collection body (1).

7. The signal acquisition component according to claim 6, characterized in that: The signal acquisition body (1) is provided with a plurality of mounting parts (4), the middle mounting hole (42) is provided on the mounting part (4), the mounting part (4) and the buffer arm (3) are located on the same side of the signal acquisition body (1), a first gap (5) is formed between the buffer arm (3) and the mounting part (4), a first pre-connection part (51) is provided in the first gap (5), and the first pre-connection part (51) connects the mounting part (4) and the buffer arm (3).

8. The signal acquisition component according to claim 6, characterized in that: The middle mounting hole (42) is provided with a through hole (43) on at least one side along the extension direction of the signal collection body (1).

9. The signal acquisition component according to claim 6, characterized in that: The middle mounting hole (42) is a waist-shaped hole, and the extending direction of the waist-shaped hole is along the expansion direction of the battery core.

10. The signal acquisition component according to claim 6, characterized in that: The signal acquisition body (1) is provided with a plurality of mounting parts (4), the middle mounting hole (42) is provided on the mounting part (4), a second gap (6) is formed between the meandering structure (2) and the buffer arm (3) or the mounting part (4), a second pre-connecting part (61) is provided in the second gap (6), and the second pre-connecting part (61) connects the meandering structure (2) and the buffer arm (3) or the mounting part (4).

11. An integrated busbar, characterized in that: It comprises a bus and a signal acquisition component according to any one of claims 1 to 10, wherein the connecting portion (22) is connected to the bus.

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