Sampling assembly for battery pack and battery pack

Abstract

The utility model provides a battery pack sampling assembly and battery pack, the sampling assembly includes a plurality of busbars, a first insulating film, a second insulating film and a collection piece, the at least part of each busbar is clamped between the first insulating film and the second insulating film, and the collection piece is clamped between the first insulating film and the second insulating film. The busbars, the first insulating film and the second insulating film are integrally formed in a hot pressing manner; the acquisition piece is arranged on one surface, far away from the second insulating film, of the first insulating film, and / or the acquisition piece is arranged on one surface, far away from the first insulating film, of the second insulating film. According to the utility model, the problems in the prior art that the acquisition member is hot-pressed between the upper insulating film and the lower insulating film, the requirement on heat resistance of the acquisition member is high, and the production is difficult to realize are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage equipment technical field, specifically, relate to a kind of for the sampling assembly and battery pack of battery pack. BACKGROUND

[0002] Battery pack usually includes electric core, busbar, collection piece, multiple electric cores are sequentially arranged to form electric core module, battery pack includes at least one electric core module, electric core is connected with electric core by busbar to realize the transmission of current carrying, and the voltage information and temperature information of electric core are transmitted to BMS by collection piece.

[0003] In order to realize the electrical isolation between busbar, collection piece and electric core, in the prior art, after collection piece is connected with busbar to form collection assembly, the upper and lower two surfaces of collection assembly are respectively covered with lower insulating film and upper insulating film, and the lower insulating film is provided with a reserved hole at the welding position of busbar and pole, so as to form a whole CCS assembly, which is convenient for subsequent installation of CCS assembly on electric core module;The above-mentioned CCS assembly hot-presses the collection piece between the upper and lower insulating films, and the heat resistance requirement of the collection piece is higher, and the production is difficult to realize. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of sampling assembly and battery pack for battery pack, to solve the problem that the heat resistance requirement of the collection piece is higher in the CCS assembly of prior art, and the production is difficult to realize.

[0005] In order to realize the above-mentioned purpose, the utility model provides a kind of sampling assembly for battery pack, including multiple busbars, first insulating film, second insulating film and collection piece, wherein at least part of each busbar is clamped between first insulating film and second insulating film, and each busbar, first insulating film, second insulating film is integrally formed in hot-pressing mode, collection piece is arranged on the side of first insulating film away from second insulating film, and / or collection piece is arranged on the side of second insulating film away from first insulating film.

[0006] In one exemplary embodiment, the sampling assembly includes two groups of busbar groups, each group of busbar groups includes multiple busbars, and the two groups of busbar groups are arranged side by side to form a avoiding area between the two groups of busbar groups;First insulating film is provided with a plurality of first avoiding through holes at the position opposite to the avoiding area;Second insulating film is provided with a plurality of second avoiding through holes at the position opposite to the avoiding area.

[0007] In one exemplary embodiment, part of each busbar in the first group of busbar groups is clamped between the first insulating film and the second insulating film;And / or, part of each busbar in the second group of busbar groups is clamped between the first insulating film and the second insulating film.

[0008] In one example embodiment, the collecting piece has a plurality of sampling branches corresponding to a plurality of busbars one by one; the sampling assembly further comprises a plurality of electric connection pieces corresponding to the plurality of sampling branches one by one and electrically connected, each electric connection piece being electrically connected to the corresponding busbar.

[0009] In one example embodiment, the first insulating film and / or the second insulating film has a plurality of avoiding notches at the edges, the plurality of avoiding notches corresponding to the plurality of electric connection pieces one by one, each avoiding notch being used for avoiding the corresponding electric connection piece.

[0010] In one example embodiment, the first insulating film and / or the second insulating film further has a positioning notch at the edge, the positioning notch being used for cooperating with the positioning protrusion on the busbar.

[0011] In one example embodiment, the collecting piece is a sampling wire harness, and the sampling branch is a branch wire harness.

[0012] In one example embodiment, a plurality of pairs of first limiting holes are formed on the first insulating film, the plurality of pairs of first limiting holes being arranged at intervals along the extension direction of the collecting piece, and the two first limiting holes in the same pair being respectively located on the two sides of the collecting piece in the radial direction; a plurality of pairs of second limiting holes are formed on the second insulating film, the second limiting holes being arranged opposite to the first limiting holes; the sampling assembly further comprises a plurality of rollers corresponding to the plurality of pairs of first limiting holes one by one, each roller penetrating through a pair of first limiting holes and a pair of second limiting holes to connect the first insulating film, the second insulating film and the collecting piece.

[0013] In one example embodiment, the first limiting hole is a waist-shaped hole extending along the extension direction of the collecting piece; and / or, the second limiting hole is a waist-shaped hole extending along the extension direction of the collecting piece.

[0014] According to another aspect of the present application, a battery pack is provided, comprising a sampling assembly and a cell, the sampling assembly being connected to the cell, and the sampling assembly being the above-mentioned sampling assembly.

[0015] The technical scheme of the utility model provides a sampling assembly for a battery pack, comprising a plurality of busbars, a first insulating film, a second insulating film and a collecting piece, wherein at least part of each busbar is clamped between the first insulating film and the second insulating film, and each busbar, the first insulating film and the second insulating film are integrally formed in a hot-pressing manner; the collecting piece is arranged on one side of the first insulating film away from the second insulating film, and / or the collecting piece is arranged on one side of the second insulating film away from the first insulating film. In this way, by integrally forming each busbar, the first insulating film and the second insulating film in a hot-pressing manner, the use of the existing isolation plate is cancelled, and the forming process is relatively convenient, which is conducive to reducing the processing and manufacturing cost of the battery pack. In addition, by arranging the collecting piece on one side of the first insulating film away from the second insulating film, and / or arranging the collecting piece on one side of the second insulating film away from the first insulating film, the temperature resistance requirement of the collecting piece in the application is relatively low, and production is also better realized. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the present application. The use of the same reference numerals in different drawings indicates similar or identical components.

[0017] Figure 1 A structural schematic view of a battery pack according to an optional embodiment of the utility model is shown;

[0018] Figure 2 A structural schematic view of a sampling assembly in Figure 1 is shown;

[0019] Figure 3 An exploded structural schematic view of a sampling assembly in Figure 2 is shown, in which only busbars, a first insulating film and a second insulating film are shown;

[0020] Figure 4 A structural schematic view of a sampling assembly according to another optional embodiment of the utility model is shown;

[0021] Figure 5 An exploded structural schematic view of a sampling assembly in Figure 4 is shown.

[0022] In the above drawings, the following reference numerals are used:

[0023] 1, sampling assembly; 2, battery cell;

[0024] 10, busbar; 11, positioning protrusion;

[0025] 20, first insulating film; 21, first avoiding via hole; 22, first limiting hole;

[0026] 30. Second insulating film; 31. Second clearance through hole; 32. Second limiting hole;

[0027] 40. Collection component; 41. Sampling branch; 42. Avoidance opening;

[0028] 50. Electrical connector; 60. Rolled strip;

[0029] 100. Avoidance gap; 200. Positioning gap. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0031] To address the problem in existing CCS modules where the sampling element is heat-pressed between upper and lower insulating films, requiring high heat resistance and posing production difficulties, this invention provides a sampling component and a battery pack. The battery pack includes a sampling component 1 and battery cells 2, with the sampling component connected to the battery cells 2. The sampling component 1 is any of the following embodiments. The embodiments of this application do not limit the specific structure of the battery pack. Multiple battery cells 2 are stacked and connected via the busbar 10 of the sampling component 1 to form a battery pack, which is then placed within the battery pack. In other possible embodiments, the battery pack may also include end plates, sides, etc. The embodiments of this application are merely illustrative examples.

[0032] like Figures 1 to 3 As shown, the sampling assembly for the battery pack includes multiple busbars 10, a first insulating film 20, a second insulating film 30, and a sampling element 40. At least a portion of each busbar 10 is sandwiched between the first insulating film 20 and the second insulating film 30, and each busbar 10, the first insulating film 20, and the second insulating film 30 are integrally formed by hot pressing. The sampling element 40 is disposed on the side of the first insulating film 20 away from the second insulating film 30, and / or, the sampling element 40 is disposed on the side of the second insulating film 30 away from the first insulating film 20.

[0033] By integrally forming the bus bars 10, the first insulating film 20 and the second insulating film 30 in a hot-pressing manner, the use of the existing isolation plate is cancelled, and the molding process is relatively convenient, which is conducive to reducing the processing and manufacturing cost of the battery pack. In addition, by arranging the collecting piece 40 on the side of the first insulating film 20 away from the second insulating film 30, and / or arranging the collecting piece 40 on the side of the second insulating film 30 away from the first insulating film 20, the temperature resistance requirement of the collecting piece 40 in the present application is lower, and the production is also better realized.

[0034] As shown in Figure 2 and Figure 3 , the sampling assembly includes two groups of bus bar groups, each group of bus bar groups includes a plurality of bus bars 10, and the two groups of bus bar groups are arranged side by side to form an avoiding area between the two groups of bus bar groups; the first insulating film 20 is provided with a plurality of first avoiding through holes 21 at a position opposite to the avoiding area; and the second insulating film 30 is provided with a plurality of second avoiding through holes 31 at a position opposite to the avoiding area. In this way, by arranging the two groups of bus bar groups side by side, the avoiding area formed between the two groups of bus bar groups can be used to avoid the explosion-proof valve on the battery cell 2. In addition, the first insulating film 20 is provided with a plurality of first avoiding through holes 21 at a position opposite to the avoiding area, and the second insulating film 30 is provided with a plurality of second avoiding through holes 31 at a position opposite to the avoiding area, which can effectively avoid the explosion-proof valve on the battery cell 2.

[0035] As shown in Figure 2 and Figure 3 , part of each bus bar 10 in the first group of bus bar groups is clamped between the first insulating film 20 and the second insulating film 30; and / or part of each bus bar 10 in the second group of bus bar groups is clamped between the first insulating film 20 and the second insulating film 30. In this way, the first insulating film 20 and the second insulating film 30 in the present application do not completely cover the first group of bus bar groups and the second group of bus bar groups, and only a first insulating film 20 and a second insulating film 30 with appropriate width are needed to hot-press the two groups of bus bar groups, the first insulating film 20 and the second insulating film 30 together.

[0036] As shown in Figure 2 , the collecting piece 40 has a plurality of sampling branches 41, and the plurality of sampling branches 41 correspond one by one to the plurality of bus bars 10; the sampling assembly further includes a plurality of electrically connecting pieces 50, the plurality of electrically connecting pieces 50 correspond one by one to the plurality of sampling branches 41 and are electrically connected, and each electrically connecting piece 50 is electrically connected to each corresponding bus bar 10. In this way, the collecting reliability of the collecting piece 40 is ensured.

[0037] As shown in Figure 2 and Figure 3As shown in the drawings, the edge of the first insulating film 20 and / or the second insulating film 30 is provided with a plurality of avoiding notches 100, the plurality of avoiding notches 100 correspond to the plurality of electric connecting pieces 50 one by one, and each avoiding notch 100 is used for avoiding the corresponding electric connecting piece 50. In this way, the overall structure compactness of the collection module is ensured, and the electric connection reliability between the electric connecting piece 50 and the busbar 10 is also ensured.

[0038] As shown in the drawings, Figure 2 and Figure 3 The edge of the first insulating film 20 and / or the second insulating film 30 is also provided with a positioning notch 200, which is used for cooperating with the positioning protrusion 11 on the busbar 10. In this way, the cooperation between the positioning notch 200 and the positioning protrusion 11 just plays a positioning role for the two groups of busbar groups, the first insulating film 20 and the second insulating film 30, and ensures the reliability of subsequent hot-press forming.

[0039] It should be noted that in the present application, the collection piece 40 is a sampling wire harness, and the sampling branch 41 is a branch wire harness.

[0040] It should be noted that in the present application, the electric connecting piece 50 is welded with the busbar 10. In this way, the connection reliability between the electric connecting piece 50 and the busbar 10 and the electric connection reliability therebetween are ensured.

[0041] It should be noted that in the present application, the sampling branch 41 is connected with the electric connecting piece 50 in a press connection mode. In this way, the connection reliability between the sampling branch 41 and the electric connecting piece 50 is ensured, so as to ensure the connection reliability between the collection piece 40 and the busbar 10.

[0042] It should be noted that in the present application, the collection piece 40, the first insulating film 20 and the second insulating film 30 are fastened and connected. In this way, the fixing reliability of the collection piece 40 is ensured.

[0043] As shown in the drawings, Figure 2As shown, the first insulating film 20 is provided with a plurality of first limiting holes 22 arranged in pairs, the plurality of first limiting holes 22 are arranged at intervals along the extension direction of the collection piece 40, and the two first limiting holes 22 in the same group are respectively located on the two sides of the collection piece 40 in the radial direction; the second insulating film 30 is provided with a plurality of second limiting holes 32 arranged in pairs, the second limiting holes 32 are arranged opposite to the first limiting holes 22; the sampling assembly further comprises a plurality of rolling strips 60, the plurality of rolling strips 60 correspond one-to-one to the plurality of first limiting holes 22 arranged in pairs, and each rolling strip 60 passes through a group of first limiting holes 22 arranged in pairs and a group of second limiting holes 32 arranged in pairs to connect the first insulating film 20, the second insulating film 30 and the collection piece 40. In this way, the connection between the collection piece 40, the first insulating film 20 and the second insulating film 30 is realized by the plurality of rolling strips 60, thereby ensuring the fixing reliability of the collection piece 40.

[0044] As shown in Figure 3 , the first limiting hole 22 is a waist-shaped hole, and the waist-shaped hole extends along the extension direction of the collection piece 40; and / or, the second limiting hole 32 is a waist-shaped hole, and the waist-shaped hole extends along the extension direction of the collection piece 40. In this way, by setting the first limiting hole 22 in the form of a waist-shaped hole, the rolling strip 60 is facilitated to be arranged, and the connection reliability between the collection piece 40, the first insulating film 20 and the second insulating film 30 by the rolling strip 60 is ensured.

[0045] As shown in Figure 4 and Figure 5 , in the embodiment, the collection piece 40 is a flexible circuit board FPC, the collection piece 40 is connected with the plurality of electrically connecting pieces 50, and is electrically connected with the plurality of bus bars 10 one-to-one through the plurality of electrically connecting pieces 50. Figure 5 As can be seen in , the collection piece 40 has an avoiding opening 42 for avoiding the explosion-proof valve on the battery cell 2, and the flexible circuit board FPC is fixed with the first insulating film 20 and the second insulating film 30 by adhesion.

[0046] The technical scheme of the utility model provides a sampling assembly for a battery pack, comprising a plurality of busbars 10, a first insulating film 20, a second insulating film 30 and a collecting piece 40, wherein at least part of each busbar 10 is clamped between the first insulating film 20 and the second insulating film 30, and each busbar 10, the first insulating film 20 and the second insulating film 30 are integrally formed in a hot-pressing manner. In this way, by integrally forming each busbar 10, the first insulating film 20 and the second insulating film 30 in a hot-pressing manner, the use of the existing isolation plate is cancelled, and the forming process is relatively convenient, which is conducive to reducing the processing and manufacturing cost of the battery pack. In addition, by arranging the collecting piece 40 on one side of the first insulating film 20 away from the second insulating film 30, and / or arranging the collecting piece 40 on one side of the second insulating film 30 away from the first insulating film 20, the temperature resistance requirement of the collecting piece 40 in the application is relatively low, and production is also better achieved.

[0047] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0048] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application, unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the purpose of providing an understanding of the example embodiments. Technical, methods, and apparatuses known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as if the discussion were incorporated herein and been part of the disclosure. In all examples shown and discussed herein, any specific values are to be interpreted as illustrative only and not as a limitation. Thus, other examples of example embodiments can have different values. It is noted that like references and letters designate like items in the following drawings and that discussion of like items in one drawing should not preclude further discussion of the same item in a subsequent drawing.

[0049] For purposes of the description hereinafter, spatial or directional terms, such as, for example, "above", "below", "upper", "lower", and the like, can be used where reference is made to the orientation of one component or feature in relation to another component or feature, as illustrated in the figures. It is to be understood that the spatial or directional terms are intended to encompass different orientations of the device in use or operation, in addition to the orientations depicted in the figures. For example, if the device described herein is inverted, then the components or features described as above other components or features would then be oriented below the other components or features. Accordingly, the exemplary term "above" can encompass both an orientation of above and below. The components or features can be oriented in any other way depending upon the application, and the spatial or directional terms are intended to encompass such other orientations or orientations that result from the device being turned over or reversed. It is also to be understood that the spatial or directional terms are intended to encompass different orientations of the device in use or operation, in addition to the orientations depicted in the figures.

[0050] It is to be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0051] It will be understood that the terms "first", "second", etc. are used herein only to describe the different objects and do not necessarily indicate a particular order or sequence. It is to be understood that the data thus described can be interchanged, where appropriate, so that the embodiments of the present application described herein can be carried out in other sequences than those illustrated or described herein.

[0052] The preferred embodiments of the present application have been described above with the aid of drawing figures, and are not limited to those embodiments; instead, they will include any modifications and variations of the methods and systems made apparent by or with the aid of the foregoing disclosure, along with their equivalents.

Claims

1. A sampling assembly for a battery pack, comprising: The sampling assembly comprises: a plurality of busbars (10), a first insulating film (20), and a second insulating film (30), wherein at least part of each of the busbars (10) is clamped between the first insulating film (20) and the second insulating film (30), and the busbar (10), the first insulating film (20), and the second insulating film (30) are integrally formed by hot pressing; a collecting member (40) arranged on a side of the first insulating film (20) away from the second insulating film (30), and / or a side of the second insulating film (30) away from the first insulating film (20).

2. The sampling assembly of claim 1, wherein, The sampling assembly comprises: two groups of busbar groups, each of the busbar groups comprises a plurality of busbars (10), and the two groups of busbar groups are arranged side by side to form an avoiding area between the two groups of busbar groups; a plurality of first avoiding vias (21) are formed in the first insulating film (20) at a position opposite to the avoiding area; a plurality of second avoiding vias (31) are formed in the second insulating film (30) at a position opposite to the avoiding area.

3. The sampling assembly according to claim 2, wherein part of each of the busbars (10) in the first group of busbar groups is clamped between the first insulating film (20) and the second insulating film (30); and / or part of each of the busbars (10) in the second group of busbar groups is clamped between the first insulating film (20) and the second insulating film (30).

4. The sampling assembly according to claim 1, wherein the collecting member (40) has a plurality of sampling branches (41), and the plurality of sampling branches (41) correspond to the plurality of busbars (10) one by one; the sampling assembly further comprises: a plurality of electrically connecting pieces (50), the plurality of electrically connecting pieces (50) correspond to the plurality of sampling branches (41) one by one and are electrically connected, and each of the electrically connecting pieces (50) is electrically connected to the corresponding busbar (10).

5. The sampling assembly of claim 4, wherein, the first insulating film (20) and / or the second insulating film (30) has an avoiding notch (100) at an edge thereof, the avoiding notch (100) is a plurality of avoiding notches (100) corresponding to the plurality of electrically connecting pieces (50) one by one, and each of the avoiding notches (100) is used for avoiding the corresponding electrically connecting piece (50).

6. The sampling assembly of claim 4, wherein, the first insulating film (20) and / or the second insulating film (30) further has a positioning notch (200) at the edge thereof, and the positioning notch (200) is used for cooperating with a positioning protrusion (11) on the busbar (10).

7. The sampling assembly of claim 4, wherein, The collecting member (40) is a sampling wire harness, and the sampling branch (41) is a branch wire harness.

8. The sampling assembly according to claim 7, wherein A plurality of first limiting holes (22) are arranged in pairs on the first insulating film (20), the first limiting holes (22) are arranged at intervals along the extension direction of the collection member (40), and the two first limiting holes (22) in the same group are respectively located on the two sides of the collection member (40) in the radial direction; A plurality of second limiting holes (32) are arranged in pairs on the second insulating film (30), and the second limiting holes (32) are arranged opposite to the first limiting holes (22); The sampling assembly further comprises a plurality of rollers (60), the plurality of rollers (60) correspond one-to-one to the plurality of groups of first limiting holes (22), each roller (60) passes through a group of first limiting holes (22) and a group of second limiting holes (32) to connect the first insulating film (20), the second insulating film (30), and the collection member (40).

9. The sampling assembly according to claim 8, wherein The first limiting hole (22) is a waist-shaped hole, and the waist-shaped hole extends along the extension direction of the collection member (40); and / or The second limiting hole (32) is a waist-shaped hole, and the waist-shaped hole extends along the extension direction of the collection member (40).

10. A battery pack, characterized by, The sampling assembly (1) and the battery cell (2) are provided, the sampling assembly is connected with the battery cell (2), and the sampling assembly (1) is the sampling assembly according to any one of claims 1 to 9.

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