Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, the battery pack has a first direction and a second direction which are perpendicular to each other, the battery pack comprises a plurality of battery monomers, an electrical isolation plate, a flexible circuit board and a cover plate, the plurality of battery monomers are arranged along the first direction, and the electrical isolation plate is respectively connected with the plurality of battery monomers; the flexible circuit board is arranged on one side, far away from the battery monomers in the second direction, of the electrical isolation plate and is connected with the electrical isolation plate; the flexible circuit board is conductively connected with the plurality of battery monomers, and the cover plate is arranged on one side, far away from the electrical isolation plate, of the flexible circuit board; the cover plate comprises a first body and a first positioning part, the first body is connected with the electrical isolation plate, the first positioning part is arranged on the side, facing the flexible circuit board, of the first body and connected with the first body, and the side, away from the first body, of the first positioning part abuts against the flexible circuit board. According to the invention, the first positioning part is abutted against the flexible circuit board, so that the flexible circuit board is firmly fixed.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack and an electrical device. Background Technology

[0002] The battery pack contains an electrical isolation plate to isolate individual battery cells and flexible circuit boards, maintaining the pack's internal insulation. However, the flexible circuit boards are usually glued to the electrical isolation plate, and over time, the adhesive may age, causing the flexible circuit boards to lose their secure fastening. Utility Model Content

[0003] The purpose of this utility model is to provide a battery pack that solves the problem of easy failure in fixing existing flexible circuit boards; another purpose of this application is to provide an electrical device.

[0004] Technical solution: A battery pack according to an embodiment of this application has a first direction and a second direction that are perpendicular to each other, including:

[0005] Multiple battery cells are arranged along the first direction;

[0006] An electrical isolation plate is disposed on one side of the plurality of battery cells along the second direction and is connected to the plurality of battery cells respectively;

[0007] A flexible circuit board is disposed on the side of the electrical isolation plate away from the battery cell along the second direction and is connected to the electrical isolation plate; the flexible circuit board is electrically connected to a plurality of the battery cells;

[0008] A cover plate is disposed on the side of the flexible circuit board away from the electrical isolation plate;

[0009] The cover plate includes:

[0010] The first body is connected to the electrical isolation plate;

[0011] A first positioning part is disposed on the side of the first body facing the flexible circuit board and connected to the first body. The side of the first positioning part away from the first body abuts against the flexible circuit board.

[0012] In some embodiments, the cover plate includes a plurality of first positioning portions, which are spaced apart and all connected to the first body.

[0013] In some embodiments, a plurality of the first positioning portions are spaced apart along the first direction.

[0014] In some embodiments, the battery pack has a third direction perpendicular to both the first direction and the second direction, and a plurality of the first positioning portions are arranged in an array along the first direction and the third direction.

[0015] In some embodiments, the side of the first positioning portion near the flexible circuit board is a plane or a sphere.

[0016] In some embodiments, the battery pack has a third direction perpendicular to both the first direction and the second direction, and the flexible circuit board includes:

[0017] The second body is connected to the electrical isolation plate and the first positioning part;

[0018] Multiple sampling wires are arranged at least partially along the third direction and embedded in the second body;

[0019] The second body has a positioning area, which is disposed between two adjacent sampling wire bundles. The positioning area is spaced apart from the sampling wire bundles and is corresponding to the first positioning part.

[0020] In some embodiments, the flexible circuit board includes a support portion disposed on the side of the second body facing the first body and connected to the second body, wherein the orthographic projection of the support portion along the second direction on the second body is completely located within the positioning area.

[0021] In some embodiments, the cover plate has a groove disposed on the side of the cover plate opposite to the flexible circuit board and recessed into the first positioning portion.

[0022] In some embodiments,

[0023] The flexible circuit board has at least one positioning hole, which penetrates the flexible circuit board along the second direction;

[0024] The electrical isolation plate includes:

[0025] The third body is connected to the first body and the plurality of battery cells respectively;

[0026] At least one second positioning part is connected to the side of the third body facing the flexible circuit board; each second positioning part passes through one of the positioning holes.

[0027] Accordingly, the electrical device described in this application includes a battery pack as described in any of the foregoing embodiments.

[0028] Beneficial effects: Compared with the prior art, a battery pack according to an embodiment of this application has a first direction and a second direction that are perpendicular to each other, including a plurality of battery cells, an electrical isolation plate, a flexible circuit board and a cover plate. The plurality of battery cells are arranged along the first direction. The electrical isolation plate is disposed on one side of the plurality of battery cells along the second direction and is connected to the plurality of battery cells respectively. The flexible circuit board is disposed on the side of the electrical isolation plate away from the battery cells along the second direction and is connected to the electrical isolation plate. The flexible circuit board is electrically connected to the plurality of battery cells. The cover plate is disposed on the side of the flexible circuit board away from the electrical isolation plate. The cover plate includes a first body and a first positioning part. The first body is connected to the electrical isolation plate. The first positioning part is disposed on the side of the first body facing the flexible circuit board and is connected to the first body. The side of the first positioning part away from the first body abuts against the flexible circuit board. This application provides a first positioning part on the side of the cover plate facing the flexible circuit board. The first positioning part abuts against the flexible circuit board, and the flexible circuit board is clamped between the electrical isolation plate and the first positioning part, thus achieving a firm fixation of the flexible circuit board. This effectively avoids the problem of the flexible circuit board failing to be fixed due to adhesive aging. In this way, the flexible circuit board can be effectively prevented from shaking up and down during vehicle operation, thereby avoiding the situation where the flexible circuit board is fatigued and broken due to accelerated fatigue.

[0029] Compared with the prior art, an electrical device according to an embodiment of this application includes a battery pack as described in any of the foregoing embodiments. It is understood that the electrical device of this application includes all the technical features and effects of the aforementioned battery pack, which will not be repeated here. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a battery pack according to an embodiment of this application;

[0032] Figure 2 This is an exploded view of a battery pack according to an embodiment of this application;

[0033] Figure 3 This is a cross-sectional view of a battery pack according to an embodiment of this application;

[0034] Figure 4 yes Figure 3 Enlarged view of section A;

[0035] Figure 5 This is a bottom view of a cover plate of a battery pack according to an embodiment of this application;

[0036] Figure 6 This is a side view of a cover plate of a battery pack according to an embodiment of this application;

[0037] Figure 7 This is a top view of an electrical isolation plate of a battery pack according to an embodiment of this application;

[0038] Figure 8 This is a schematic diagram of the structure of a flexible circuit board for a battery pack according to an embodiment of this application;

[0039] Figure 9 This is a schematic diagram of the assembly of a flexible circuit board and an electrical isolation plate of a battery pack according to an embodiment of this application;

[0040] Figure 10 This is a schematic diagram of the internal wiring of a flexible circuit board for a battery pack according to an embodiment of this application;

[0041] Figure 11 This is a cross-sectional view of a battery pack according to an embodiment of this application, where the contact surface between the first positioning part and the flexible circuit board is a plane;

[0042] Figure 12 This is a cross-sectional view of a battery pack whose first positioning part and the contact surface of the flexible circuit board are spherical, according to an embodiment of this application.

[0043] Figure 13 This is a schematic diagram of the structure of a flexible circuit board with multiple positioning areas spaced apart along a first direction, according to an embodiment of this application.

[0044] Figure 14 This is a schematic diagram of the structure of a flexible circuit board with multiple positioning areas arranged in a Z-shaped array according to an embodiment of this application;

[0045] Figure 15 This is a schematic diagram of the structure of a flexible circuit board with multiple positioning areas arranged in an alternating circular and waist-shaped manner, according to an embodiment of this application.

[0046] Reference numerals: 100, battery cell; 200, electrical isolation plate; 210, third body; 220, second positioning part; 300, flexible circuit board; 310, second body; 311, positioning area; 320, sampling harness; 330, support part; 340, positioning hole; 400, cover plate; 410, first body; 420, first positioning part; 440, groove; X, first direction; Z, second direction; Y, third direction. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0048] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular, for example, the range of included angles between 85° and 95° is considered perpendicular. Similarly, "parallel" means completely parallel or almost completely parallel, for example, the range of completely parallel angles between 10° is considered parallel.

[0049] It should also be noted that in the accompanying drawings of this application, arrows labeled X indicate the first direction X, arrows labeled Z indicate the second direction Z, and arrows labeled Y indicate the third direction Y. The introduction of the first direction X, the second direction Z, and the third direction Y is to facilitate the description of the structural positional relationships of the battery pack, thereby aiding in understanding its structure. In the embodiments of this application, the first direction X is the arrangement direction of the multiple batteries, the second direction Z is the height direction of the battery pack, and the third direction Y is the width direction of the battery pack; furthermore, the first direction X, the second direction Z, and the third direction Y are perpendicular to each other.

[0050] Battery packs typically contain individual battery cells, electrical isolation boards, data acquisition harnesses (flexible circuit boards), and top covers. The flexible circuit board is positioned between the top cover and the electrical isolation board and is fixed with adhesive. However, over time, the adhesive tape can age and lose its stickiness, causing the flexible circuit board to lose its fixation. This can lead to the flexible circuit board vibrating up and down during vehicle operation. Prolonged shaking can accelerate fatigue damage and breakage of the flexible circuit board.

[0051] In view of this, embodiments of this application provide a battery pack and a power-consuming device, which aim to solve the above-mentioned problems.

[0052] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 This application provides a battery pack having a first direction X and a second direction Z perpendicular to each other, including a plurality of battery cells 100, an electrical isolation plate 200, a flexible circuit board 300, and a cover plate 400. The plurality of battery cells 100 are arranged along the first direction X. The electrical isolation plate 200 is disposed on one side of the plurality of battery cells 100 along the second direction Z and is connected to the plurality of battery cells 100 respectively. The flexible circuit board 300 is disposed on the side of the electrical isolation plate 200 away from the battery cells 100 along the second direction Z and is connected to the electrical isolation plate 400. The flexible circuit board 300 is electrically connected to the electrical isolation plate 200; the cover plate 400 is disposed on the side of the flexible circuit board 300 away from the electrical isolation plate 200; the cover plate 400 includes a first body 410 and a first positioning part 420. The first body 410 is connected to the electrical isolation plate 200, the first positioning part 420 is disposed on the side of the first body 410 facing the flexible circuit board 300 and connected to the first body 410, and the side of the first positioning part 420 away from the first body 410 abuts against the flexible circuit board 300.

[0053] In this embodiment, by providing a first positioning part 420 on the side of the cover plate 400 facing the flexible circuit board 300, and using the first positioning part 420 to abut against the flexible circuit board 300, the flexible circuit board 300 is clamped between the electrical isolation plate 200 and the first positioning part 420, thus achieving a firm fixation of the flexible circuit board 300. This effectively avoids the problem of the flexible circuit board 300 failing to be fixed due to adhesive aging. In this way, the flexible circuit board 300 can be effectively prevented from shaking up and down during vehicle operation, thereby preventing the flexible circuit board 300 from accelerating fatigue and breaking.

[0054] Specifically, the battery pack in this embodiment may include multiple battery cells 100, an electrical isolation plate 200, a flexible circuit board 300, a busbar, a cover plate 400, etc. The electrical isolation plate 200 is used to position the busbar and partially derating the busbar between it and the battery cells 100. The busbar and battery cells 100 are electrically connected, and the electrical isolation plate 200 is clamped between the battery cells 100 and the busbar. The flexible circuit board 300 is connected to the electrical isolation plate 200, and a first positioning part 420 abuts the flexible circuit board 300 between the electrical isolation plate 200 and a first positioning post, thereby preventing the flexible circuit board 300 from shaking between the electrical isolation plate 200 and the cover plate 400. This avoids the problem that long-term shaking will accelerate fatigue damage and breakage of the flexible circuit board 300.

[0055] like Figure 5 and Figure 6 As shown, in some embodiments, the cover plate 400 includes a plurality of first positioning parts 420, which are spaced apart and all connected to the first body 410.

[0056] In this embodiment of the application, by setting multiple spaced first positioning parts 420, multi-point positioning and fixing of the flexible circuit board 300 can be achieved, thereby improving the positioning and fixing effect of the flexible circuit board 300.

[0057] like Figure 5 As shown, in some embodiments, a plurality of the first positioning portions 420 are spaced apart along the first direction X.

[0058] In this embodiment, multiple first positioning parts 420 are spaced apart along the first direction X, which enables multi-point positioning along the length of the flexible circuit board 300, ensuring that the flexible circuit board 300 has a good fixing effect.

[0059] In some embodiments, the battery pack has a third direction Y that is perpendicular to both the first direction X and the second direction Z, and a plurality of the first positioning portions 420 are arranged in an array along the first direction X and the third direction Y.

[0060] In this embodiment of the application, multiple first positioning parts 420 are arranged in an array. At this time, some of the first positioning parts 420 are arranged along the first direction X, and some of the first positioning parts 420 are arranged along the third direction Y. This can achieve a larger range of fixation on the flexible circuit board 300, ensure a better fixation and positioning effect on the flexible circuit board 300, and further reduce the possibility of breakage of the flexible circuit board 300.

[0061] like Figure 11 and Figure 12As shown, in some embodiments, the side of the first positioning part 420 near the flexible circuit board 300 is a plane or a sphere.

[0062] In this embodiment, the side of the first positioning part 420 that abuts against the flexible circuit board 300 is a plane or a sphere. This can prevent the first positioning part 420 from puncturing or penetrating the flexible circuit board 300, and play a role in protecting the flexible circuit board 300 when the first positioning part 420 abuts against the flexible circuit board 300.

[0063] Of course, the first positioning part 420 can be a cylindrical positioning post or a long strip positioning post, wherein the side that abuts against the flexible circuit board 300 is provided with rounded corners to avoid puncturing the flexible circuit board 300.

[0064] like Figure 10 As shown, in some embodiments, the battery pack has a third direction Y perpendicular to both the first direction X and the second direction Z. The flexible circuit board 300 includes a second body 310 and multiple sampling wire harnesses 320. The second body 310 is connected to the electrical isolation plate 200 and the first positioning part 420. The multiple sampling wire harnesses 320 are arranged at least partially along the third direction Y and embedded in the second body 310. The second body 310 has a positioning area 311, which is disposed between two adjacent sampling wire harnesses 320. The positioning area 311 is spaced apart from the sampling wire harnesses 320 and is correspondingly disposed to the first positioning part 420.

[0065] In this embodiment, by setting a positioning area 311 in the second body 310 to avoid the sampling wire harness 320, and by using the positioning area 311 to abut against the first positioning part 420 and the electrical isolation plate 200, the sampling wire harness 320 can be prevented from being crushed, thus ensuring the service life of the flexible circuit board 300.

[0066] In this embodiment, the number and position of the positioning areas 311 are set according to the position of the first positioning part 420. If multiple first positioning parts 420 are spaced apart along the first direction X, then multiple positioning areas 311 are correspondingly set, and the multiple positioning areas 311 are spaced apart along the first direction X. Specifically, it can be as follows: Figure 13 As shown. If multiple first positioning units 420 are arranged in an array along the first direction X and the third direction Y, then multiple positioning areas 311 are set to correspond one-to-one with the positions of the multiple first positioning units 420, as shown in the figure. Figure 14 and Figure 15 As shown.

[0067] like Figure 9As shown, in some embodiments, the flexible circuit board 300 includes a support portion 330, which is disposed on the side of the second body 310 facing the first body 410 and connected to the second body 310. The orthographic projection of the support portion 330 along the second direction Z on the second body 310 is completely located within the positioning area 311.

[0068] In this embodiment of the application, by setting the support portion 330 between the first positioning portion 420 and the second body 310, the squeezing of the second body 310 by the first positioning portion 420 can be further reduced, thereby effectively protecting the second body 310 and the acquisition harness from being squeezed and damaged.

[0069] like Figure 1 , Figure 4 , Figure 11 and Figure 12 In some embodiments, the cover plate 400 has a groove 440, which is disposed on the side of the cover plate 400 away from the flexible circuit board 300 and recessed into the first positioning portion 420.

[0070] In this embodiment of the application, by setting the groove 440, the weight of the cover plate 400 can be reduced on the one hand, and the deformation capability of the first positioning part 420 can be improved on the other hand. During vehicle operation, the slight deformation of the first positioning part 420 reduces the pressure damage to the second body 310.

[0071] Please refer to the following: Figure 4 , Figure 7 , Figure 8 and Figure 9 In some embodiments, the flexible circuit board 300 has at least one positioning hole 340 that penetrates the flexible circuit board 300 along the second direction Z; the electrical isolation plate 200 includes a third body 210 and at least one second positioning part 220, the third body 210 is connected to the first body 410 and the plurality of battery cells 100 respectively, and at least one second positioning part 220 is connected to the side of the third body 210 facing the flexible circuit board 300; each second positioning part 220 passes through one of the positioning holes 340.

[0072] In this embodiment of the application, by setting a positioning hole 340 to cooperate with a second positioning part 220, and by using the second positioning part 220 to pass through the positioning hole 340, the flexible circuit board 300 is limited along the first direction X and the third direction Y, thereby further reducing the possibility of displacement of the flexible circuit board 300.

[0073] Accordingly, the electrical device described in this application includes a battery pack as described in any of the foregoing embodiments.

[0074] It is understood that the electrical device of this application includes all the technical features and effects of the aforementioned battery pack, which will not be repeated here.

[0075] Of course, the electrical devices referred to in this application can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be new energy vehicles, including pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles; spacecraft include airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. This application does not impose any special limitations on the above-mentioned electrical devices.

[0076] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0077] The battery pack and power device provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack, characterized in that, Having a first direction and a second direction that are perpendicular to each other, including: Multiple battery cells are arranged along the first direction; An electrical isolation plate is disposed on one side of the plurality of battery cells along the second direction and is connected to the plurality of battery cells respectively; A flexible circuit board is disposed on the side of the electrical isolation plate away from the battery cell along the second direction and is connected to the electrical isolation plate; the flexible circuit board is electrically connected to a plurality of the battery cells; A cover plate is disposed on the side of the flexible circuit board away from the electrical isolation plate; The cover plate includes: The first body is connected to the electrical isolation plate; A first positioning part is disposed on the side of the first body facing the flexible circuit board and connected to the first body. The side of the first positioning part away from the first body abuts against the flexible circuit board.

2. The battery pack according to claim 1, characterized in that, The cover plate includes a plurality of first positioning parts, which are spaced apart and all connected to the first body.

3. The battery pack according to claim 2, characterized in that, Multiple first positioning parts are spaced apart along the first direction.

4. The battery pack according to claim 2, characterized in that, The battery pack has a third direction perpendicular to both the first direction and the second direction, and a plurality of the first positioning parts are arranged in an array along the first direction and the third direction.

5. The battery pack according to claim 1, characterized in that, The side of the first positioning part near the flexible circuit board is either a plane or a sphere.

6. The battery pack according to claim 1, characterized in that, The battery pack has a third direction perpendicular to both the first and second directions, and the flexible circuit board includes: The second body is connected to the electrical isolation plate and the first positioning part; Multiple sampling wires are arranged at least partially along the third direction and embedded in the second body; The second body has a positioning area, which is disposed between two adjacent sampling wire bundles. The positioning area is spaced apart from the sampling wire bundles and is corresponding to the first positioning part.

7. The battery pack according to claim 6, characterized in that, The flexible circuit board further includes a support portion, which is disposed on the side of the second body facing the first body and connected to the second body. The orthogonal projection of the support portion on the second body along the second direction is completely located within the positioning area.

8. The battery pack according to claim 1, characterized in that, The cover plate has a groove, which is located on the side of the cover plate opposite to the flexible circuit board and recessed into the first positioning part.

9. The battery pack according to claim 1, characterized in that, The flexible circuit board has at least one positioning hole, which penetrates the flexible circuit board along the second direction; The electrical isolation plate includes: The third body is connected to the first body and the plurality of battery cells respectively; At least one second positioning part is connected to the side of the third body facing the flexible circuit board; each second positioning part passes through one of the positioning holes.

10. An electrical device, characterized in that, Includes the battery pack as described in any one of claims 1-9.

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