Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, and relates to the field of lithium batteries. The battery pack comprises a battery cell assembly, a plurality of first aluminum bars, a plurality of second aluminum bars, a flexible circuit board and at least three supporting strips, wherein the battery cell assembly comprises a plurality of battery cells, each first aluminum bar is electrically connected with positive electrodes of two battery cells, and each second aluminum bar is electrically connected with negative electrodes of two battery cells. On the basis, the at least three supporting strips are sequentially arranged at intervals in the length direction of the flexible circuit. Moreover, a glue filling channel is formed between any two adjacent supporting strips and is used for filling glue, so that a glue layer with uniform thickness is formed above the flexible circuit board. It is easy to understand that in the application, the height of the supporting strip is the glue pouring thickness on the flexible circuit, and the glue pouring thickness can be accurately controlled by selecting the proper supporting strip, so that the situation that the thermal management performance is affected due to the fact that the glue layer is too thick or the protection performance is affected due to the fact that the glue layer is too thin is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery technical field, specifically, relate to a battery pack and electric equipment. BACKGROUND

[0002] In the prior art, the three ternary battery cell packs are usually subjected to glue pouring treatment on the upper part of the CCS during assembly to improve the stability and safety of the overall structure.

[0003] However, the inventors have found that in actual production, it is difficult to accurately control the glue thickness when pouring glue on the distribution area of the intermediate FPC (flexible circuit board). UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a battery pack and electric equipment, which can accurately control the glue pouring thickness above the flexible circuit board and avoid excessive or insufficient glue layer.

[0005] Embodiments of the utility model can be implemented as follows:

[0006] In a first aspect, the utility model provides a battery pack, comprising:

[0007] A cell assembly, which comprises a plurality of cells;

[0008] A plurality of first aluminum bars, each of which is electrically connected to the positive poles of two cells;

[0009] A plurality of second aluminum bars, each of which is electrically connected to the negative poles of two cells;

[0010] A flexible circuit board, which is located above the cell assembly and between the first aluminum bars and the second aluminum bars;

[0011] At least three support bars, which are sequentially and spacedly arranged along the length direction of the flexible circuit, and a glue pouring channel is formed between any two adjacent support bars.

[0012] In an optional embodiment, the height of any one of the support bars ranges from 2.5 mm to 3.5 mm.

[0013] In an optional embodiment, the number of the support bars is five, and the five support bars are equidistantly spaced along the length direction of the flexible circuit.

[0014] In an optional embodiment, the battery pack further comprises a support body, which is pasted with all the support bars.

[0015] In an optional embodiment, the height of the support body ranges from 12.5 mm to 13.5 mm.

[0016] In an optional embodiment, a projection of the support body on a horizontal plane completely covers a projection of the flexible circuit board on the horizontal plane.

[0017] In an optional embodiment, the battery pack further comprises a support block, which is attached to a side of the support body away from the support strips, for supporting the lid.

[0018] In an optional embodiment, the number of support blocks is at least two, and the at least two support blocks are arranged at intervals along the length direction of the support body.

[0019] In an optional embodiment, the battery pack further comprises a lid, which is attached to a side of the support block away from the support body.

[0020] In a second aspect, the utility model provides a kind of electric equipment, including the battery pack of any one of the foregoing embodiments.

[0021] The battery pack and electric equipment provided by the embodiments of the utility model have the following beneficial effects:

[0022] The battery pack and electric equipment provided by the embodiments of the utility model have the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced to the drawings needed to be used in the embodiments, and should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as the limitation to the scope, and for the ordinary skilled person in the art, on the premise of not paying creative labor, other related drawings can also be obtained according to these drawings.

[0024] Figure 1 The partial structure schematic view of the battery pack provided for the embodiment is shown in the figure;

[0025] Figure 2 The structure schematic view of the battery pack filled with glue provided for the embodiment is shown in the figure;

[0026] Figure 3Another structure schematic diagram of the battery pack after glue filling provided for the embodiment;

[0027] Figure 4 The structure schematic diagram of the battery pack provided for the embodiment Figure 3 An enlarged schematic diagram of the structure at A in the battery pack provided for the embodiment

[0028] Figure 5 The structure schematic diagram of the support strip, the support block and the support body provided for the embodiment.

[0029] Icon: 10-battery pack; 100-cell assembly; 110-cell; 310-first aluminum bar; 330-second aluminum bar; 500-flexible circuit board; 710-support strip; 730-support body; 750-support block; 770-gel layer. DETAILED DESCRIPTION

[0030] In the related art, when the battery pack is filled with glue in the distribution area of the middle flexible circuit board, the glue thickness is often difficult to accurately control.

[0031] To solve the above problems, the utility model provides a battery pack 10 and an electric equipment, which can accurately control the glue filling thickness above the flexible circuit board 500, and avoid the situation that the gel layer 770 is too thick or too thin.

[0032] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0034] It should be noted that: similar signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0035] In the description of the utility model, it needs to be explained that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, it is only for the convenience of describing the utility model and simplifying the description, and it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0036] In addition, if the terms "first", "second" and the like are used only to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0038] The overall structure, working principle and technical effects of the battery pack 10 and the electric equipment provided by the utility model are described in detail below through embodiments and in conjunction with the drawings.

[0039] Figure 1 A partial structure schematic view of the battery pack 10 provided for the embodiment, Figure 2 A structure schematic view of the battery pack 10 after glue filling provided for the embodiment, Figure 3 Another structure schematic view of the battery pack 10 after glue filling provided for the embodiment, Figure 4 A structure schematic view of the battery pack 10 provided for the embodiment, Figure 3 An enlarged schematic view of the structure at A in the above, Figures 1 to 4 The application provides a battery pack 10, in particular a ternary cell 110 battery pack 10, which is applied to an electric equipment and comprises a cell assembly 100, a plurality of first aluminum bars 310, a plurality of second aluminum bars 330, a flexible circuit board 500 and at least three supporting strips 710.

[0040] The cell assembly 100 comprises a plurality of cells 110, each first aluminum bar 310 is electrically connected to the positive poles of two cells 110, and each second aluminum bar 330 is electrically connected to the negative poles of two cells 110. On the basis, the at least three supporting strips 710 are sequentially and spacedly arranged along the length direction of the flexible circuit. And a glue filling channel is formed between any two adjacent supporting strips 710, which is used for filling glue, so as to form a glue layer 770 with uniform thickness above the flexible circuit board 500.

[0041] It is easy to understand that in the application, the height of the supporting strip 710 is also the glue filling thickness on the flexible circuit, and by selecting a suitable supporting strip 710, the glue filling thickness can be accurately controlled, so as to avoid that the glue layer 770 is too thick to affect the heat management performance, or the glue layer 770 is too thin to affect the protection performance.

[0042] It should be noted that the position of the flexible circuit board 500 generally corresponds to the position of the explosion-proof valve. Therefore, by providing the support strips 710, the thickness of the glue layer 770 at the position of the explosion-proof valve can be appropriately ensured to be moderate, achieving the beneficial effects that the electrolyte can be effectively protected and the normal operation of the explosion-proof valve is not affected. Optionally, the height of any one support strip 710 is between 2.5 mm and 3.5 mm.

[0043] Please refer to Figure 5 In some embodiments, the number of support strips 710 is five, and the five support strips 710 are equidistantly arranged along the length direction of the flexible circuit. It is easy to understand that the five equidistantly arranged support strips 710 form four equal-width glue filling channels, which ensure the uniform filling amount of the glue in each area and avoid the problem of uneven thickness of the glue layer 770 caused by excessive or insufficient glue filling in a local area.

[0044] Exemplarily, based on the number of support strips 710 being five, the specific size of the selected support strip 710 is 45x15x3 mm, and the distance between any two adjacent support strips 710 is 173 mm.

[0045] In some embodiments, in order to further achieve the beneficial effect of limiting the thickness of the glue layer 770 above the flexible circuit board 500, the battery pack 10 further comprises a support body 730, and the support body 730 is pasted with all the support strips 710.

[0046] It should be noted that the opposite sides of any one support strip 710 are provided with back glue, so as to be pasted with the flexible circuit board 500 and the support body 730, respectively. Optionally, the support strip 710 is pasted with the PC sheet on the flexible circuit board 500. In addition, it should be noted that ensuring that at least three support strips 710 are sequentially and equidistantly arranged along the length direction of the flexible circuit can achieve the beneficial effect of avoiding local collapse of the support body 730.

[0047] Considering that the glue filling process will also be performed above the first aluminum bar 310 and the second aluminum bar 330, in order to avoid that the glue layer 770 at this position does not cover the support body 730, the height of the support body 730 is between 12.5 mm and 13.5 mm. For example, in the case that the glue filling thickness of the first aluminum bar 310 and the second aluminum bar 330 is 12 mm, the height of the support body 730 is 13 mm.

[0048] Further, the projection of the support body 730 on the horizontal plane completely covers the projection of the flexible circuit board 500 on the horizontal plane, thereby avoiding the partial over-thickness of the adhesive layer 770 above the flexible circuit board 500. Based on this, the thickness of the adhesive layer 770 at each position on the flexible circuit board 500 is maintained at about 3 mm, thereby facilitating the prevention of electrolyte diffusion in daily use, and thereby also facilitating the guaranteeing of the ability of the explosion-proof valve to open in time when thermal runaway occurs, to release internal pressure and prevent explosion.

[0049] Please refer again to Figure 5 To improve the supportability of the box cover while avoiding affecting the glue pouring, the battery pack 10 further comprises a support block 750, which is pasted to the side of the support body 730 away from the support bar 710, for supporting the box cover. It should be noted that the support block 750 is not pasted to the upper part of the first aluminum bar 310 and the second aluminum bar 330, so as to ensure that the upper part of the first aluminum bar 310 and / or the second aluminum bar 330 is fully glued, thereby ensuring the protection of the adhesive layer 770 at this position.

[0050] Correspondingly, the battery pack 10 further comprises a box cover, which is pasted to the side of the support block 750 away from the support body 730, thereby being supported by the support block 750 to reduce deflection under load. In addition, similarly to the foregoing, to avoid the collapse of the box cover, the number of support blocks 750 is at least two, and the at least two support blocks 750 are arranged at intervals along the length direction of the support body 730.

[0051] In addition, it should be further noted that the support bar 710, the support body 730, and the support block 750 are all made of foam material.

[0052] Taking the battery pack 10 provided in the present application as an example, the glue pouring process is as follows: five support bars 710 are pasted at equal intervals above the flexible circuit board 500 along the length direction of the flexible circuit board 500; the support body 730 is pasted above the five support bars 710; and the support block 750 is pasted above the support body 730. Then, the glue is poured so that the glue flows through the first aluminum bar 310 and the second aluminum bar 330, and fills the glue pouring channels between any two support bars 710, until the adhesive layer 770 above the first aluminum bar 310 and the second aluminum bar 330 reaches the predetermined thickness, and the glue pouring is completed.

[0053] In summary, the application provides a battery pack 10, which comprises a battery cell assembly 100, a plurality of first aluminum bars 310, a plurality of second aluminum bars 330, a flexible circuit board 500, and at least three support bars 710. The battery cell assembly 100 comprises a plurality of battery cells 110. Each first aluminum bar 310 is electrically connected to the positive electrode of two battery cells 110. Each second aluminum bar 330 is electrically connected to the negative electrode of two battery cells 110. On the basis of the above, the at least three support bars 710 are sequentially and spacedly arranged along the length direction of the flexible circuit. Furthermore, a glue filling channel is formed between any two adjacent support bars 710, which is used to fill glue, so as to form a glue layer 770 with uniform thickness above the flexible circuit board 500. It is easy to understand that the height of the support bar 710, i.e. the glue filling thickness on the flexible circuit, can be accurately controlled by selecting a suitable support bar 710, so as to avoid that the glue layer 770 is too thick to affect the heat management performance, or the glue layer 770 is too thin to affect the protection performance.

[0054] In addition, the application also provides a power consuming device comprising the battery pack 10 in the foregoing embodiments, so that the power consuming device can also accurately control the glue filling thickness, avoid that the glue layer 770 is too thick to affect the heat management performance, or the glue layer 770 is too thin to affect the protection performance.

[0055] The above is only a specific implementation manner of the application, but the protection scope of the application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the application, which should be covered in the protection scope of the application.

Claims

1. A battery pack, characterized by, The battery pack (10) comprises: an electric core assembly (100) comprising a plurality of electric cores (110); a plurality of first aluminum bars (310), each of which electrically connects the positive poles of two of the electric cores (110); a plurality of second aluminum bars (330), each of which electrically connects the negative poles of two of the electric cores (110); a flexible circuit board (500) located above the electric core assembly (100) and between the first aluminum bars (310) and the second aluminum bars (330); at least three support bars (710) arranged in sequence along the length direction of the flexible circuit board (500) and forming a glue filling channel between any two adjacent support bars (710).

2. The battery pack of claim 1, wherein, The height of any one of the support bars (710) ranges from 2.5 mm to 3.5 mm.

3. The battery pack of claim 1, wherein, The number of the support bars (710) is five, and the five support bars (710) are equidistantly arranged along the length direction of the flexible circuit board (500).

4. The battery pack of any one of claims 1 to 3, wherein, The battery pack (10) further comprises a support body (730) adhered to all the support bars (710).

5. The battery pack of claim 4, wherein, The height of the support body (730) ranges from 12.5 mm to 13.5 mm.

6. The battery pack of claim 4, wherein, The projection of the support body (730) on the horizontal plane completely covers the projection of the flexible circuit board (500) on the horizontal plane.

7. The battery pack of claim 4, wherein, The battery pack (10) further comprises a support block (750) adhered to the side of the support body (730) away from the support bars (710) for supporting a box cover.

8. The battery pack of claim 7, wherein, The number of the support blocks (750) is at least two, and the at least two support blocks (750) are arranged in sequence along the length direction of the support body (730).

9. The battery pack of claim 7, wherein, The battery pack (10) further comprises the box cover adhered to the side of the support blocks (750) away from the support body (730).

10. An electric device, characterized by The battery pack (10) comprises the battery pack according to any one of claims 1 to 9. The battery pack (10) comprises the battery pack according to any one of claims 1 to 9.

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