Information acquisition assembly, battery pack and electric equipment

Abstract

The utility model provides an information acquisition assembly, battery pack, electric equipment, information acquisition assembly includes circuit board and conducting bar, circuit board includes circuit board main part and a plurality of circuit board branches, conducting bar includes a plurality of conducting units, at least one circuit board branch is electrically connected between circuit board main part and the corresponding conducting unit, and the conducting bar is electrically connected between the circuit board main part and the conducting unit. And the circuit board branches, the circuit board main body and the corresponding conductive units are separately arranged, so that the circuit board branches and the circuit board main body can be conveniently connected and designed in a definable manner.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to an information acquisition component, a battery pack, and an electrical device. Background Art

[0002] In the related art, the transfer form of the circuit board main body of the information acquisition component is usually nickel sheet transfer, or circuit board branch bending transfer form, but the transfer cost is high. At the same time, since the circuit board main body and the circuit board branch are usually designed as one piece, the connection between the circuit board main body and the circuit board branch cannot be defined and adjusted. The definition adjustment means: in the preparation process of the information acquisition component, when the signal acquisition line on the circuit board main body is welded to the branch, the signal acquisition line cannot be selected to be connected to any branch, and the signal acquisition line can only be connected to the branch in order, and cannot be selectively connected in disorder, resulting in an inability to define and adjust.

[0003] Therefore, the information acquisition component in the related art has a technical problem that the connection between the circuit board main body and the circuit board branch cannot be defined and adjusted. Utility Model Content

[0004] The embodiments of the present utility model provide an information acquisition component, a battery pack, and an electrical device, which can improve the technical problem in the related art that the connection between the circuit board main body and the circuit board branch of the information acquisition component cannot be defined and adjusted.

[0005] In a first aspect, an embodiment of the present invention provides an information collection component, comprising:

[0006] A circuit board, comprising a circuit board main body and a plurality of circuit board branches;

[0007] A conductive bar, comprising a plurality of conductive units, each of which is used to electrically connect a corresponding battery cell;

[0008] Wherein, at least one of the circuit board branches is electrically connected between the circuit board body and the corresponding conductive unit, and at least one of the circuit board branches is separately provided from the circuit board body and the corresponding conductive unit.

[0009] In one embodiment, one end of the circuit board branch is welded to the circuit board body, and the other end of the circuit board branch is welded to the corresponding conductive unit.

[0010] In one embodiment, the circuit board branch includes a main body pad, and a main body pad window is provided at one end of the circuit board branch close to the circuit board main body to expose the main body pad, and the main body pad is welded to the circuit board main body through the main body pad window.

[0011] In one embodiment, the main body pad is provided with at least one through hole.

[0012] In one embodiment, the circuit board branch includes a conductive pad, and a conductive pad window is provided at the other end of the circuit board branch close to the conductive unit to expose the conductive pad so that the conductive pad can be welded to the corresponding conductive unit.

[0013] In one embodiment, the circuit board branch includes a buffer arm, which is located between the one end of the circuit board branch close to the circuit board body and the other end close to the conductive unit, and is provided with at least one buffer hole.

[0014] In one embodiment, two grooves are provided on opposite sides of the circuit board branch, and the two grooves are arranged opposite to each other or staggered.

[0015] In one embodiment, each of the buffer holes includes a first end and a second end relative to each other; wherein, in the width direction of the circuit board branch, the two first ends of the two buffer holes are aligned, and the end of each groove is aligned with the second end of the corresponding buffer hole.

[0016] In a second aspect, an embodiment of the present invention provides a battery pack comprising the information acquisition component as described in any of the above embodiments.

[0017] In a third aspect, an embodiment of the present invention provides an electrical device, comprising the information collection component as described in any of the above embodiments.

[0018] Beneficial effects of the embodiments of the present utility model:

[0019] In an embodiment of the present utility model, the circuit board branch, the circuit board main body and the corresponding conductive unit are all separately provided, and the circuit board branch is electrically connected to the circuit board main body and the corresponding conductive unit by welding, so that the connection relationship between the circuit board main body and the circuit board branch can be defined and adjusted, thereby improving the technical problem in the related art that the connection between the circuit board main body and the circuit board branch cannot be defined and adjusted in the information acquisition component. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1It is a schematic diagram of the information acquisition component and the power management component provided by the embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of a circuit board branch in an information acquisition component provided by an embodiment of the present utility model;

[0023] Figure 3 It is a schematic diagram of a cut-off hole during the preparation process of the information acquisition component provided by an embodiment of the present utility model.

[0024] Description of reference numerals:

[0025] DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0027] See also Figure 1 The information acquisition component 4 provided by the embodiment of the present utility model includes a circuit board and a conductive bar, the circuit board includes a circuit board main body 1 and multiple circuit board branches 2, the conductive bar includes multiple conductive units 3, and each conductive unit 3 is used to electrically connect the corresponding battery cell; wherein, at least one circuit board branch 2 is electrically connected between the circuit board main body 1 and the corresponding conductive unit 3, and at least one circuit board branch 2 is separately arranged from the circuit board main body 1 and the corresponding conductive unit 3.

[0028] In this embodiment, by setting the circuit board branch 2, the circuit board main body 1 and the corresponding conductive unit 3 separately, welding is used to facilitate the design of a definable connection between the circuit board branch 2 and the circuit board main body 1, thereby improving the technical problem in the related art that the connection between the circuit board main body 1 and the circuit board branch 2 of the information acquisition component 4 cannot be defined and adjusted.

[0029] The connection definition or defined connection design of the present application refers to: when a welding process is used to complete the welding between the circuit board body 1 and the circuit board branch 2, any signal connection line 13 that is electrically connected to the battery management component 11 can be selectively electrically connected to any circuit board branch 2 in a one-to-one correspondence. For example: the circuit board body 1 includes multiple signal connection lines 13N1, N2, ..., Nn, and multiple circuit board branches 2 include M1, M2, ..., Mm, and m=n. When a welding process is used to complete the welding between the circuit board body 1 and the circuit board branch 2, any one of M1, M2, ..., Mm can be selectively electrically connected to any one of N1, N2, ..., Nn in a one-to-one correspondence.

[0030] The technical solution of this application is now described in conjunction with specific embodiments.

[0031] The circuit board body 1 in the present application can be an FPC (Flexible Printed Circuit) body, the circuit board branch 2 can be an FFC (flexible flat cable) branch, the conductive unit 3 can be a bus, and the circuit board body 1 includes multiple signal connection lines 13, which are independent of each other and arranged side by side. The signal connection lines 13 are connected between the signal acquisition port of the battery management component 11 and the corresponding conductive unit 3.

[0032] In one embodiment, see Figure 1 One end of the circuit board branch 2 is welded to the circuit board body 1 , and the other end of the circuit board branch 2 is welded to the corresponding conductive unit 3 .

[0033] It can be understood that the electrical connection between the circuit board main body 1 and the circuit board branch 2 is achieved by welding. At the welding position, the insulating layer between the circuit board branch 2 and the circuit board main body 1 needs to be hollowed out so that the conductive part of the circuit board main body 1 is in direct contact with the conductive part of the circuit board branch 2.

[0034] In one embodiment, see Figure 2 The circuit board branch 2 includes a main body pad 5. One end of the circuit board branch 2 is provided with a main body pad window to expose the main body pad 5 so that the main body pad 5 can be welded to the circuit board body 1.

[0035] The main body pad 5 is used for welding with the circuit board body 1 , and the main body pad window is used to hollow out the insulating layer on the side of the main body pad 5 facing the circuit board body 1 to expose the main body pad 5 .

[0036] It is understandable that in the area where the main pad window is opened, part of the insulation layer of the circuit board main body 1 needs to be removed to expose the conductive part of the circuit board main body 1 so that the conductive part is aligned with the main pad 5 and welded.

[0037] In one embodiment, see Figure 2 The main body pad 5 is provided with at least one through hole 10 .

[0038] The through hole 10 is provided through the main body pad 5 along the thickness direction of the main body pad 5 .

[0039] The plurality of through holes 10 are evenly arranged on the main body pad 5 .

[0040] The through holes 10 are circular holes, and the diameters of the multiple circular holes may be the same.

[0041] Among them, multiple through holes 10 are arranged in two rows along the length direction of the circuit board branch 2, the number of through holes 10 in one row is equal to the number of through holes in the other row, and the through holes in two adjacent rows are symmetrically arranged about a midline along the row direction.

[0042] It can be understood that the through hole 10 is used to exhaust air during welding between the main pad 5 and the circuit board body 1. On the one hand, it reduces bubbles generated during welding and makes the welding stronger. On the other hand, it can avoid the formation of cold solder joints during welding.

[0043] In this embodiment, by providing at least one through hole 10 on the main body pad 5 , a cold solder joint between the main body pad 5 and the circuit board body 1 can be avoided, thereby improving the firmness of the solder joint.

[0044] In one embodiment, see Figure 2 The circuit board branch 2 includes a conductive pad 6 , and the other end of the circuit board branch 2 is provided with a conductive pad window to expose the conductive pad 6 so that the conductive pad 6 can be welded to the corresponding conductive unit 3 .

[0045] The conductive pad 6 can be welded to the conductive unit 3 , and the conductive pad window is used to hollow out the insulating layer on the side of the conductive pad 6 facing the conductive unit 3 to expose the conductive pad 6 .

[0046] In one embodiment, see Figure 2 The circuit board branch 2 includes a buffer arm 7 , which is located between one end and the other end of the circuit board branch 2 and is provided with at least one buffer hole 8 .

[0047] The buffer arm 7 is located between the main pad 5 and the conductive pad 6 .

[0048] The buffer arm 7 may be made of the same material as the circuit board branch 2 .

[0049] The buffer arm 7 may include two buffer holes 8 , and the buffer holes 8 may be centrally symmetrically arranged.

[0050] The buffer hole 8 is used to absorb the displacement and extrusion stress caused by the expansion of the circuit board branch 2.

[0051] The cross-sectional shape of the buffer hole 8 can be curved.

[0052] The buffer hole 8 can be in the shape of "S". Figure 2

[0053] The depth of the buffer hole 8 can be 0.15mm to 0.3mm, and the length and width of the buffer hole 8 are greater than 0.8mm.

[0054] It can be understood that the buffer hole 8 is arranged through the circuit board branch 2, and the thickness of the circuit board branch 2 in the film thickness direction is the depth of the buffer hole 8. The depth of the buffer hole 8 can be 0.15mm, 0.2mm, 0.25mm, or 0.3mm.

[0055] It can be understood that when the length or width of the buffer hole 8 is less than 0.8mm, the yield of the process for preparing the buffer hole 8 will be significantly reduced. By making the length and width of the buffer hole 8 greater than 0.8mm, on the one hand, the size of the buffer hole 8 is larger, which improves the buffering effect of the buffer hole 8, and on the other hand, the process difficulty for preparing the buffer hole 8 is reduced, which improves the yield of preparing the buffer hole 8.

[0056] It can be understood that by arranging two or more buffer holes 8 to be centrally symmetric, the buffering effect of the buffer hole 8 on the thermal expansion of the circuit board branch 2 can be further improved. At the same time, by arranging the cross-sectional shape of the buffer hole 8 to be curved, such as the shape of "S", the buffering effect of the buffer hole 8 on the stress can also be improved.

[0057] In this embodiment, by arranging the buffer arm 7 on the circuit board branch 2, and forming the buffer hole 8 arranged through the buffer arm 7, the stress caused by the expansion of the circuit board branch 2 can be absorbed, and the abnormality of the circuit board branch 2 caused by the stress can be prevented.

[0058] In one embodiment, referring to Figure 2 The opposite sides of the circuit board branch 2 are provided with two grooves 9.

[0059] The depth of the groove 9 is less than or equal to 1mm.

[0060] The groove 9 is located on the opposite side surfaces of the circuit board branch 2 in the width direction, and is recessed inward from the surface to form the groove 9.

[0061] The grooves 9 located on the opposite side surfaces can be arranged in a staggered manner.

[0062] The shape and size of the grooves 9 located on the opposite side surfaces can be the same.​

[0063] It can be understood that when the conductive unit 3 is offset along the length direction of the information collection component 4, the conductive unit 3 will be displaced relative to the circuit board branch 2, and the groove 9 has the effect of buffering this displacement. Furthermore, it can also prevent the branch from being warped by force when the material is received.

[0064] In this embodiment, grooves 9 are provided on two opposite sides of the circuit board branch 2 to prevent the circuit board branch 2 from warping.

[0065] In one embodiment, see Figure 2 , each buffer hole 8 includes a first end and a second end opposite to each other; wherein, in the width direction of the circuit board branch 2, the two first ends of the two buffer holes 8 are aligned, and the end of each groove 9 is aligned with the second end of the corresponding buffer hole 8.

[0066] In one embodiment, the information acquisition component 4 further includes a protective film, and in the film thickness direction, at least the orthographic projection of the main body pad 5 falls within the protective film.

[0067] The protective film may be made of polyethylene terephthalate.

[0068] It can be understood that since the insulating layers on both sides of the main pad 5 need to be removed, by attaching the protective film to the lower surface of the circuit board branch 2, the lower surface of the main pad 5 after welding is covered by the protective film and is not exposed, and external erosion will be blocked by the protective film without affecting the main pad 5.

[0069] It can be understood that at the conductive pad, a protective glue is formed by dispensing glue on the side of the circuit board branch away from the conductive unit. The protective glue covers the surface of the conductive pad away from the conductive unit, which can prevent the conductive pad from being corroded by the outside world.

[0070] In this embodiment, the protective film is used to protect the main body pad 5 after welding is completed, so as to prevent the exposed area of ​​the main body pad 5 from being corroded by the environment during use, which may cause the main body pad 5 to fail.

[0071] In one embodiment, both the circuit board main body 1 and the circuit board branch 2 may be designed as a three-layer laminated structure, wherein the three-layer laminated structure includes a conductive layer and two insulating layers located on both sides of the conductive layer.

[0072] Among them, at the position where the circuit board main body 1 and the circuit board branch 2 are welded, the insulating layer between the circuit board main body 1 and the circuit board branch 2 is hollowed out to facilitate welding of the circuit board main body 1 and the circuit board branch 2.

[0073] Among them, at the position where the circuit board branch 2 and the conductive unit 3 are welded, the insulating layer between the circuit board branch 2 and the conductive unit 3 is hollowed out to facilitate welding of the circuit board branch 2 and the conductive unit 3.

[0074] In one embodiment, the length of the main body pad ranges from 2 mm to 200 mm, the width of the main body pad ranges from 5 mm to 15 mm, the length of the conductive pad 6 ranges from 5 mm to 15 mm, and the width of the conductive pad 6 ranges from 5 mm to 15 mm.

[0075] The length of the main body welding can be any one of 2 mm, 35.3 mm, 50 mm, 100 mm, and 200 mm.

[0076] The width of the main body welding can be any one of 5 mm, 8 mm, 10 mm, 13 mm, and 15 mm.

[0077] The length of the conductive pad 6 can be any one of 5 mm, 8 mm, 10 mm, 13 mm, and 15 mm.

[0078] The width of the conductive pad 6 can be any one of 5 mm, 8 mm, 10 mm, 13 mm, and 15 mm.

[0079] An embodiment of the present utility model further provides a battery pack and an electrical device, both of which include an information acquisition component 4 as in any of the above embodiments; the information acquisition component 4 includes a circuit board and a conductive bar, the circuit board includes a circuit board main body 1 and multiple circuit board branches 2, the conductive bar includes multiple conductive units 3, and each conductive unit 3 is used to electrically connect a corresponding battery cell; wherein, at least one circuit board branch 2 is electrically connected between the circuit board main body 1 and the corresponding conductive unit 3, and at least one circuit board branch 2 is separately arranged from the circuit board main body 1 and the corresponding conductive unit 3; by separately arranging the circuit board branch 2 from the circuit board main body 1 and the corresponding conductive unit 3, a definable connection design between the circuit board branch 2 and the circuit board main body 1 is facilitated by welding.

[0080] The connection relationship between the signal acquisition terminal of the battery management component 11 and the signal connection line 13 of the information acquisition component 4 is sequential and corresponds to each other.

[0081] The battery pack further includes a battery management component 11 , which includes a plurality of signal acquisition terminals, and the plurality of signal acquisition terminals are sequentially connected to the signal connection lines 13 of the plurality of circuit board bodies 1 in a one-to-one correspondence.

[0082] In one embodiment, the battery management component 11 and the information acquisition component 4 are connected via a wiring harness.

[0083] Among them, the battery management component 11 includes a first male connector, the information acquisition component 4 includes a second male connector, and the two ends of the wiring harness respectively include a first female connector and a second female connector. By electrically connecting the first male connector with the first female connector and the second male connector with the second female connector, an electrical connection is achieved between the battery management component 11 and the information acquisition component 4.

[0084] In one embodiment, the battery management component 11 and the information collection component 4 are electrically connected by means of a gold finger plug-in.

[0085] It is understandable that directly electrically connecting the connection end of the battery management component 11 and the connection end of the information acquisition component 4 through gold finger plugging can save the wiring harness used for switching and further reduce costs.

[0086] In one embodiment, see Figure 3 , it is defined that the circuit board branch 2 and the circuit board main body 1 are welded at the first welding point, and the circuit board branch 2 and the conductive unit 3 are welded at the second welding point. When preparing the information acquisition component 4, a truncation hole 12 is formed on the circuit board main body 1. The truncation hole 12 is used to divide the signal connection line 13 of the circuit board main body 1 into a first part 131 and a second part that are independent of each other. The first part 131 is connected between the first welding point and the signal acquisition port of the battery management system 11, and the second part is discarded and removed from the information acquisition component 4.

[0087] It can be understood that by first preparing multiple signal connection lines 13 of the same length, according to the position of the first welding point where the signal connection line 13 is welded to the circuit board branch 2, and then by setting a cut-off hole 12 on the circuit board body 1, the second part of the signal connection line 13 located on the side of the first welding point away from the signal collection port is removed.

[0088] It is understandable that the second part does not need to be powered on, and the second part is independent of the first part 131 , which can avoid electrical safety accidents in the second part and reduce electrical safety accidents of the information collection component 4 .

[0089] It should be noted that the second part is not included in the structure of the information acquisition component 4. Since the truncation hole 12 is located at the edge of the first part 131, the surface of the side of the first part 131 away from the signal acquisition port may appear irregular or rough due to the truncation of the truncation hole 12; wherein, the formation process of the truncation hole 12 can be laser etching.

[0090] In this embodiment, the second portion is cut off and removed by forming the cut-off hole 12, thereby reducing the occurrence of electrical safety accidents.

[0091] The information acquisition component 4 provided by the present invention is configured such that the circuit board body 1, the circuit board branch 2, and the conductive unit 3 are all separately arranged, so that the connection between the circuit board body 1 and the circuit board branch 2 can be defined. By making the connection between the circuit board body 1 and the circuit board branch 2 definable, production efficiency can be improved.

[0092] The information acquisition component 4 of the present invention can also realize electrical connection between the circuit board branch 2 and the circuit board body 1 and the conductive unit 3 respectively by welding. Compared with the nickel sheet transfer form used in the related art, the present invention can save the nickel sheet and reduce the cost.

[0093] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. An information collection component, characterized in that: include: A circuit board, comprising a circuit board main body and a plurality of circuit board branches; A conductive bar, comprising a plurality of conductive units, each of which is used to electrically connect a corresponding battery cell; Wherein, at least one of the circuit board branches is electrically connected between the circuit board body and the corresponding conductive unit, and at least one of the circuit board branches is separately provided from the circuit board body and the corresponding conductive unit.

2. The information collection component according to claim 1, characterized in that: One end of the circuit board branch is welded to the circuit board body, and the other end of the circuit board branch is welded to the corresponding conductive unit.

3. The information collection component according to claim 2, characterized in that: The circuit board branch includes a main body pad. A main body pad opening is provided at one end of the circuit board branch close to the circuit board main body to expose the main body pad. The main body pad is welded to the circuit board main body through the main body pad opening.

4. The information collection component according to claim 3, characterized in that: The main body pad is provided with at least one through hole.

5. The information collection component according to claim 2, characterized in that: The circuit board branch includes a conductive pad. The other end of the circuit board branch close to the conductive unit is provided with a conductive pad window to expose the conductive pad so that the conductive pad can be welded to the corresponding conductive unit.

6. The information collection component according to claim 2, characterized in that: The circuit board branch includes a buffer arm, which is located between the one end of the circuit board branch close to the circuit board body and the other end close to the conductive unit and is provided with at least one buffer hole.

7. The information collection component according to claim 6, characterized in that: Two grooves are provided on opposite sides of the circuit board branch, and the two grooves are arranged opposite to each other or staggered.

8. The information collection component according to claim 7, characterized in that: Each of the buffer holes includes a first end and a second end relative to each other; wherein, in the width direction of the circuit board branch, the two first ends of the two buffer holes are aligned, and the end of each groove is aligned with the second end of the corresponding buffer hole.

9. A battery pack, characterized in that: The device comprises the information collection component according to any one of claims 1 to 8.

10. An electrical device, characterized in that: The device comprises the information collection component according to any one of claims 1 to 8.

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