Battery cell head soft plate fixing structure and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cell head soft plate fixing structure and a battery. The battery cell head soft plate fixing structure comprises gummed paper, the gummed paper comprises a positioning glue section and a fixing glue section which are connected, and a cutting-off line convenient for snapping the gummed paper is arranged between the positioning glue section and the fixing glue section. The soft plate at the head part of the battery cell is bent to the upper part of the injection molding part; and the free end of the soft plate extends towards the boss and is spaced from the boss by a preset distance. The positioning glue section of the gummed paper is used for being bonded to the boss, and the fixing glue section of the gummed paper is used for being bonded to the soft board so that the soft board can be fixed. And meanwhile, the positioning rubber section is matched with the boss in size, so that the positioning rubber section can be exactly adhered to the boss, and the cutting line is not overlapped with the soft board. Therefore, the boss can be used for positioning the sticking position of the gummed paper, so that an operator can quickly and accurately finish the positioning and sticking of the gummed paper; and meanwhile, the gummed paper can be conveniently snapped during follow-up battery assembly, the mobility of the soft plate can be recovered, and the position of the soft plate can be adjusted.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of batteries, in particular to a battery and a fixing structure of a soft plate at the head of a battery cell. BACKGROUND

[0002] A battery generally comprises a battery cell, a protection plate and an injection molding part, the protection plate is arranged at the head of the battery cell (i.e. one end of the battery cell in the length direction of the battery cell provided with a tab), and the head of the battery cell and the protection plate are covered by the injection molding part. At present, in order to reduce the space occupied by the battery in the length direction of the battery, the protection plate is usually placed horizontally at the head of the battery cell, i.e. the plate surface of the protection plate is perpendicular to the length direction of the battery cell, and the soft plate on the protection plate is bent to the upper side of the injection molding part; however, the soft plate is not fixed after being bent, so that the soft plate and the connector on the soft plate are easily damaged or broken or the soft plate is inclined during transportation, which affects the product yield and subsequent assembly.

[0003] At present, the soft plate is usually fixed by using adhesive paper, however, the adhesive paper is not convenient for operators to quickly position the adhesive position of the adhesive paper, and it is also not convenient for restoring the activity of the soft plate to adjust the position of the soft plate during subsequent assembly. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims to provide a fixing structure of a soft plate at the head of a battery cell and a battery, so as to quickly position and bond the adhesive paper at the head of the battery cell, to fix the soft plate by using the adhesive paper, and to conveniently restore the activity of the soft plate.

[0005] The utility model provides a fixing structure of a soft plate at the head of a battery cell, which comprises adhesive paper.

[0006] The adhesive paper is formed with a positioning adhesive section and a fixing adhesive section connected with each other, and a cutting line is arranged between the positioning adhesive section and the fixing adhesive section.

[0007] The adhesive paper is used for fixing the soft plate at the head of the battery cell, the soft plate is bent to the upper side of the injection molding part from the injection molding part at the head of the battery cell, the upper side of the injection molding part is formed with a boss, the free end of the soft plate extends towards the boss and is spaced apart from the boss by a predetermined distance.

[0008] The positioning adhesive section is bonded to the boss, the fixing adhesive section is bonded to the soft plate, and the size of the positioning adhesive section is matched with the boss, so that the boss can position the bonding position of the adhesive paper, and the cutting line does not overlap with the soft plate.

[0009] Further, the cutting line comprises a plurality of cutouts, and the cutouts are arranged at intervals along the length direction of the cutting line.

[0010] The length of the cutout is L3, the interval between two adjacent cutouts is L4, and 1.4≤L4 / L3≤1.5.

[0011] Further, the length of the positioning adhesive segment is L1, the length of the boss along the length direction of the adhesive paper is L2, and -2.5mm≤L1-L2≤2.5mm.

[0012] Further, one side of the positioning adhesive segment in the width direction is aligned with one side of the boss in the width direction.

[0013] Further, the number of the soft plates is two, the two soft plates are arranged at intervals along the width direction of the battery cell, and the boss is located between the two soft plates.

[0014] The adhesive paper is provided with two cut lines, the two cut lines are arranged at intervals along the length direction of the adhesive paper, the positioning adhesive segment is formed between the two cut lines, and two fixed adhesive segments are formed outside the two cut lines, and the two fixed adhesive segments are correspondingly bonded with the two soft plates.

[0015] Further, the two soft plates are a first soft plate and a second soft plate, respectively, and the length of the first soft plate is greater than that of the second soft plate.

[0016] The two fixed adhesive segments are a first adhesive segment and a second adhesive segment, respectively, the length of the first adhesive segment is greater than that of the second adhesive segment, the first adhesive segment is used for bonding the first soft plate, and the second adhesive segment is used for bonding the second soft plate.

[0017] Further, one side of the first soft plate in the width direction is provided with a connecting plate for arranging a connector.

[0018] The positioning adhesive segment and the first adhesive segment are both provided with an extension part towards one side of the connecting plate in the width direction, and the connecting plate is located between the extension part of the positioning adhesive segment and the extension part of the first adhesive segment.

[0019] Further, the size D of the extension part in the width direction of the adhesive paper is 0.8mm to 1.2mm.

[0020] Further, the length of the first adhesive segment is 15mm to 20mm, and the length of the second adhesive segment is 7mm to 12mm.

[0021] The utility model further provides a battery which comprises the cell head soft plate fixing structure of any one of the above.

[0022] Compared with the prior art, the utility model has the beneficial effects that:

[0023] The fixing structure of the soft plate of the head of the battery cell provided by the utility model comprises adhesive paper, the adhesive paper comprises a positioning adhesive section and a fixing adhesive section which are connected along the length direction of the adhesive paper, and a cutting line for facilitating the tearing of the adhesive paper is arranged between the positioning adhesive section and the fixing adhesive section. The adhesive paper is used for fixing the soft plate of the head of the battery cell, the soft plate extends from the injection molding part of the head of the battery cell and is bent to the upper part of the injection molding part, a boss is formed on the upper part of the injection molding part, and the free end of the soft plate extends towards the boss and is spaced apart from the boss by a predetermined distance. When the adhesive paper is used for fixing the soft plate, the positioning adhesive section of the adhesive paper is bonded to the boss, and the fixing adhesive section is directed towards the soft plate and is bonded to the soft plate, so that the soft plate of the head of the battery cell is fixed by the adhesive paper, and the soft plate and the connector on the soft plate are prevented from being damaged or deformed during transportation, thereby affecting the subsequent assembly. Meanwhile, the size of the positioning adhesive section is matched with the size of the boss, so that the positioning adhesive section can be bonded to the boss, and when the fixing adhesive section is bonded to the soft plate, the cutting line between the positioning adhesive section and the fixing adhesive section does not overlap the soft plate. Therefore, the bonding position of the adhesive paper can be positioned by the boss, so that the operator can quickly and accurately complete the positioning and bonding of the adhesive paper, and the adhesive paper can be easily torn during the subsequent battery assembly, and the activity of the soft plate is restored to adjust the position of the soft plate.

[0024] The utility model also provides a kind of battery, including the fixing structure of the head of the battery cell soft plate described, so the battery also has the beneficial effects of the fixing structure of the head of the battery cell soft plate. DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0026] Figure 1 The structure schematic diagram of the fixing structure of the head of the battery cell soft plate under the first visual angle provided by the utility model embodiment is provided.

[0027] Figure 2 The structure schematic diagram of the fixing structure of the head of the battery cell soft plate under the second visual angle provided by the utility model embodiment is provided.

[0028] Figure 3 The structure schematic diagram of the adhesive paper provided by the utility model embodiment is provided.

[0029] Figure 4 The partial schematic diagram of the adhesive paper provided by the utility model embodiment is provided.

[0030] REFERENCE SIGNS:

[0031] 1-cell, 2-injection molding part, 21-boss, 3-soft plate, 31-first soft plate, 32-second soft plate, 33-connection plate, 4-adhesive tape, 41-first adhesive section, 42-second adhesive section, 43-positioning adhesive section, 44-cutting line, 45-extension, 46-cutting. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0033] The components of the embodiments of the present application generally described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.

[0034] Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] The following will be described with reference to Figures 1 to 4 The cell head soft plate fixing structure and the battery according to some embodiments of the present application are described.

[0038] The present application provides a cell head soft plate fixing structure, such as Figures 1 to 3As shown, the soft plate fixing structure of the cell head includes adhesive paper 4, the adhesive paper 4 includes a positioning adhesive segment 43 and a fixing adhesive segment (the fixing adhesive segment includes a first adhesive segment 41 and a second adhesive segment 42 below) connected along the length direction of the adhesive paper 4, and a cutting line 44 is arranged between the positioning adhesive segment 43 and the fixing adhesive segment to facilitate tearing of the adhesive paper 4.

[0039] The adhesive paper 4 is used to fix the soft plate 3 of the cell head; specifically, the head of the cell 1 (i.e. one end of the cell 1 provided with a tab in the length direction of the cell 1) is provided with a protection plate and an injection molding 2, the protection plate is laid on the head of the cell 1, so that the plate surface of the protection plate is perpendicular to the length direction of the cell 1, the injection molding 2 covers the head of the cell 1 and the main body part of the protection plate, and the soft plate 3 on the protection plate extends out of the injection molding 2 and is bent to the upper side of the injection molding 2 (i.e. the side of the injection molding 2 away from the cell 1 in the length direction of the cell 1); at the same time, a boss 21 is formed on the upper side of the injection molding 2, and the end of the soft plate 3 away from the protection plate, i.e. the free end of the soft plate 3, extends towards the boss 21 and is spaced apart from the boss 21 by a predetermined distance.

[0040] When the soft plate 3 is fixed by the adhesive paper 4, the positioning adhesive segment 43 of the adhesive paper 4 is adhered to the boss 21, and the fixing adhesive segment is directed towards the soft plate 3 and adhered to the soft plate 3, so that the soft plate 3 of the cell head is fixed by the adhesive paper 4, avoiding the soft plate 3 and the connector on the soft plate 3 being pressed and damaged or the soft plate 3 being skewed during transportation, thereby affecting subsequent assembly.

[0041] At the same time, the size of the positioning adhesive segment 43 is matched with the size of the boss 21, so that the positioning adhesive segment 43 can be adhered to the boss 21, and when the fixing adhesive segment is adhered to the soft plate 3, the cutting line 44 between the positioning adhesive segment 43 and the fixing adhesive segment does not overlap the soft plate 3. Thus, the position of the adhesive paper 4 can be positioned by the boss 21, so that the operator can quickly and accurately complete the positioning and adhesion of the adhesive paper 4; at the same time, it is also convenient to tear the adhesive paper 4 during subsequent battery assembly, so as to restore the activity of the soft plate 3 and adjust the position of the soft plate 3.

[0042] In this embodiment, preferably, as shown in Figure 4 The cutting line 44 includes a plurality of cutouts 46 penetrating the adhesive paper 4, and the plurality of cutouts 46 are arranged at intervals along the length direction of the cutting line 44; the length of the cutout 46 is L3, and the interval between the adjacent two cutouts 46 is L4, 1.4≤L4 / L3≤1.5; further preferably, L3=0.35mm, and L4=0.5mm; so as to facilitate the operator to tear the adhesive paper 4 from the cutting line 44, and also to ensure that the adhesive paper 4 will not be accidentally broken during transportation.

[0043] In an embodiment of the present application, preferably, as shown in Figure 2 and Figure 3As shown, the positioning adhesive segment 43 has a length L1 along the width direction of the battery cell 1, and the boss 21 has a length L2 along the width direction of the battery cell 1. The positioning adhesive segment 43 of the adhesive tape 4 is adapted to the boss 21, which means that the length of the positioning adhesive segment 43 is slightly greater than or slightly less than the length of the boss 21, for example, -2.5mm≤L1-L2≤2.5mm. When the positioning adhesive segment 43 is bonded to the boss 21, the cutting line 44 can be made close to the edge of the boss 21, so as to realize the positioning of the bonding position of the adhesive tape 4 in the length direction of the adhesive tape 4, ensure that the cutting line 44 does not overlap the soft plate 3, and facilitate the subsequent pulling of the adhesive tape 4 to restore the activity of the soft plate 3.

[0044] Further preferably, the length of the positioning adhesive segment 43 is slightly greater than the length of the boss 21, that is, 0

[0045] In this embodiment, preferably, as shown in Figure 1 When the positioning adhesive segment 43 is bonded to the boss 21, one side of the positioning adhesive segment 43 in the width direction is aligned with one side of the boss 21 in the width direction, so as to realize the positioning of the bonding position of the adhesive tape 4 in the width direction of the adhesive tape 4 by using the boss 21.

[0046] In this embodiment, preferably, an extension 45 is formed on the side of the positioning adhesive segment 43 away from the side aligned with the boss 21, so as to increase the bonding area of the adhesive tape 4 on the boss 21 through the extension 45 and improve the bonding stability.

[0047] In one example of the present application, preferably, as shown in Figure 2 The head of the battery cell 1 is provided with two soft plates 3, the two soft plates 3 extend from the injection molding part 2 along the opposite ends of the battery cell 1 in the width direction, the free ends of the two soft plates 3 extend towards the boss 21 on the injection molding part 2 after being bent, and the boss 21 is located between the free ends of the two soft plates 3.

[0048] In this embodiment, the adhesive tape 4 is provided with two cutting lines 44, the two cutting lines 44 are arranged at intervals along the length direction of the adhesive tape 4, and the two cutting lines 44 divide the adhesive tape 4 into three segments, namely the positioning adhesive segment 43 in the middle and the two fixed adhesive segments at the two ends. When the adhesive tape 4 is used to bond the soft plate 3, the positioning adhesive segment 43 is bonded to the boss 21, the two fixed adhesive segments are correspondingly bonded to the two soft plates 3, and the two cutting lines 44 are located between the free ends of the two soft plates 3 and close to the edges of the boss 21 on the opposite sides.

[0049] In this embodiment, preferably, the two soft plates 3 are respectively a first soft plate 31 and a second soft plate 32, the length of the first soft plate 31 is greater than the length of the second soft plate 32; the two fixed adhesive sections are respectively a first adhesive section 41 and a second adhesive section 42, the length of the first adhesive section 41 is greater than the length of the second adhesive section 42. When the adhesive tape 4 is pasted, the first adhesive section 41 is made to face and be bonded to the first soft plate 31, and the second adhesive section 42 is made to face and be bonded to the second soft plate 32. Thus, the first adhesive section 41 with a longer length is used to bond and fix the first soft plate 31 with a longer length, so as to be able to increase the bonding area and ensure the stability of the bonding of the first soft plate 31 with a longer length.

[0050] Preferably, the length of the first adhesive section 41 is 15mm to 20mm; for example, the length of the first adhesive section 41 is 16mm, 17mm, 18mm or 20mm.

[0051] Preferably, the length of the second adhesive section 42 is 7mm to 12mm; for example, the length of the second adhesive section 42 is 8mm, 9mm, 10mm or 11mm.

[0052] In this embodiment, preferably, the same side of the width direction of the first soft plate 31 and the second soft plate 32 is provided with a connecting plate 33 for arranging a connector; the adhesive tape 4 is also provided with an extension 45 on the side of the width direction of the first adhesive section 41 facing the connecting plate 33, and the extension 45 on the positioning adhesive section 43 and the extension 45 on the first adhesive section 41 are located on the same side of the adhesive tape 4, and the connecting plate 33 on the first soft plate 31 is located between the two extensions 45; thus, the bonding area between the first adhesive section 41 and the first soft plate 31 is increased by providing the extension 45 on the first adhesive section 41, and the stability of the bonding is improved.

[0053] Regarding the extension 45 on the positioning adhesive section 43 and the first adhesive section 41, preferably, the size D of the extension 45 in the width direction of the adhesive tape 4 is 0.8mm to 1.2mm; for example, D is 0.9mm, 1.0mm or 1.1mm; thus, the size of the injection molding part 2 in the thickness direction of the battery cell 1 (i.e. the width direction of the adhesive tape 4) is fully utilized, and the bonding area of the adhesive tape 4 is improved.

[0054] The application also provides a battery cell head soft plate fixing structure.

[0055] In this embodiment, the battery cell includes the battery cell head soft plate fixing structure, so the battery has all the beneficial effects of the battery cell head soft plate fixing structure, which will not be repeated here.

[0056] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A flexible circuit board fixing structure for the head of a battery cell, characterized in that, The adhesive paper comprises a positioning adhesive section and a fixing adhesive section, and a cutting line is arranged between the positioning adhesive section and the fixing adhesive section. The adhesive paper is used to fix the soft plates of the head of the battery cell, the soft plates extend from the injection molding of the head of the battery cell and are bent to the upper part of the injection molding, the upper part of the injection molding is formed with a boss, the free end of the soft plate extends towards the boss and is spaced apart from the boss by a predetermined distance. The positioning adhesive section is bonded to the boss, the fixing adhesive section is bonded to the soft plate, and the size of the positioning adhesive section and the boss is matched, so that the boss can position the bonding position of the adhesive paper, and the cutting line does not overlap with the soft plate. The cutting line comprises a plurality of cutouts, and the plurality of cutouts are arranged along the length direction of the cutting line.

2. The cell head soft plate fixing structure according to claim 1, characterized in that, The length of the cutout is L3, the spacing between adjacent two cutouts is L4, and 1.4≤L4 / L3≤1.

5. The length of the positioning adhesive section is L1, the length of the boss along the length direction of the adhesive paper is L2, and -2.5mm≤L1-L2≤2.5mm.

3. The cell head soft plate fixing structure according to claim 1, characterized in that, One side of the positioning adhesive section in the width direction is aligned with one side of the boss in the width direction.

4. The cell head soft board fixing structure according to claim 1, characterized in that, The number of the soft plates is two, and the two soft plates are arranged along the width direction of the battery cell, and the boss is located between the two soft plates.

5. The cell head soft board fixing structure according to claim 1, characterized in that, Two cutting lines are arranged on the adhesive paper, and the two cutting lines are arranged along the length direction of the adhesive paper, the positioning adhesive section is formed between the two cutting lines, and two fixing adhesive sections are formed outside the two cutting lines, and the two fixing adhesive sections are bonded to the two soft plates one by one. The two soft plates are a first soft plate and a second soft plate, and the length of the first soft plate is greater than that of the second soft plate.

6. The cell head soft board fixing structure according to claim 5, characterized in that, The two fixing adhesive sections are a first adhesive section and a second adhesive section, the length of the first adhesive section is greater than that of the second adhesive section, the first adhesive section is used to bond the first soft plate, and the second adhesive section is used to bond the second adhesive section. One side of the first soft plate in the width direction is provided with a connecting plate for arranging a connector.

7. The cell head soft board fixing structure according to claim 6, characterized in that, The positioning adhesive section and the first adhesive section are both provided with an extension part towards one side of the connecting plate in the width direction, and the connecting plate is located between the extension part of the positioning adhesive section and the extension part of the first adhesive section. The size D of the extension part in the width direction of the adhesive paper is 0.8mm to 1.2mm.

8. The cell head soft board fixing structure according to claim 7, characterized in that, The length of the first adhesive section is 15mm to 20mm, and the length of the second adhesive section is 7mm to 12mm.

9. The cell head soft board fixing structure according to claim 6, characterized in that, The battery cell head soft plate fixing structure comprises the battery cell head soft plate fixing structure according to any one of claims 1 to 9.

10. A battery, characterized by ​

Images