Glue overflow prevention device and battery

Abstract

The utility model relates to the field of battery structures, in particular to a glue overflow prevention device and a battery. The glue overflow prevention device is arranged between the battery cell and the shell and comprises a plurality of glue blocking parts; the multiple glue blocking parts are arranged at intervals in the stacking direction of the battery cells, and a glue applying space is formed between every two adjacent glue blocking parts; and the plurality of glue blocking parts cover vacant gaps formed among the plurality of battery cells and between the battery cells and the shell so as to block glue from overflowing into the vacant gaps. According to the invention, the glue blocking parts are arranged at the vacant gaps formed by the battery cell, and the glue blocking parts can block the glue from flowing into the vacant gaps, so that the generation of a triangular prism structure is avoided. A glue applying space is formed between the adjacent glue blocking parts, and the glue can enter the glue applying space to connect the shell and the battery cell, so that the arrangement of the glue blocking parts does not influence the bonding and fixing of the glue on the battery cell.

Description

Technical Field

[0001] The present application relates to the field of battery structure, and in particular to an anti-overflow glue device and a battery. Background Art

[0002] In order to meet the requirements of vibration, impact, thermal conductivity, etc., glue is used more and more widely in battery systems. Glue with better fluidity has higher requirements on the horizontality of the glue application surface. Glue with poor fluidity can improve this problem to a certain extent, but it will still escape to the surroundings under the extrusion of the battery, which may cause overflow from the set bonding area of ​​the glue and contaminate other parts. Especially for soft-pack batteries, glue with higher strength after curing poses certain risks to soft-pack batteries, especially under conditions of long-term use or mechanical abuse, which may cause local damage to the battery, thereby creating greater risks. Utility Model Content

[0003] The purpose of the present application is to provide an anti-overflow glue device and a battery, which can frame the glue in a set bonding area to prevent the glue from overflowing and contaminating other components; and can block the empty gaps between battery cells to prevent the glue that enters the empty gaps from puncturing the battery cells after solidification.

[0004] The present application provides a glue overflow prevention device, which is arranged between a battery cell and a housing, and the glue overflow prevention device includes a plurality of glue blocking parts;

[0005] The plurality of glue blocking portions are arranged at intervals along the stacking direction of the battery core, and glue application spaces are formed between adjacent glue blocking portions;

[0006] The plurality of adhesive blocking parts cover the vacant gaps formed between the plurality of battery cells and between the battery cells and the shell, so as to prevent adhesive from overflowing into the vacant gaps.

[0007] In the above technical solution, further, the plurality of rubber blocking parts include a first rubber blocking part and / or a second rubber blocking part;

[0008] The width of the first glue blocking portion is greater than or equal to a first preset width, and the first preset width is the sum of the radius of the edge fillets of two adjacent battery cells;

[0009] The width of the second glue blocking portion is greater than or equal to a second preset width, the second preset width is the sum of the edge fillet radius of two adjacent battery cells and the thickness of the first isolation member, and the first isolation member is located between the two adjacent battery cells.

[0010] In the above technical solution, further, the plurality of rubber blocking parts further include a third rubber blocking part and / or a fourth rubber blocking part;

[0011] The width of the third glue stop portion is greater than or equal to a third preset width, and the third preset width is the fillet radius of the edge of the battery cell;

[0012] The width of the fourth glue stopper is greater than or equal to a fourth preset width, the fourth preset width is the sum of the edge fillet radius of the battery cell and the thickness of the second isolating member, and the second isolating member is located between the battery cell and the shell.

[0013] In the above technical solution, further, it also includes a connecting portion;

[0014] The connecting portion is used to connect at least two of the rubber blocking portions; the connecting portion is provided at both ends of the plurality of rubber blocking portions in the length direction; and / or at least one of the connecting portions is provided in the middle of the plurality of rubber blocking portions in the length direction.

[0015] In the above technical solution, further, the rubber blocking portion and the connecting portion are integrally formed.

[0016] In the above technical solution, further, the material of the anti-glue overflow device is a breathable structure with pores; the anti-glue overflow device is an elastomer.

[0017] In the above technical solution, further, it also includes a positioning component;

[0018] The positioning assembly includes a protruding structure and an embedded structure. One of the shell and the rubber blocking part is provided with the protruding structure, and the other is provided with the embedded structure. The protruding structure is placed in the embedded structure to position and install the rubber blocking part on the shell.

[0019] In the above technical solution, further, an adhesive layer is provided on a side of the anti-glue overflow device facing the shell.

[0020] In the above technical solution, further, the anti-glue overflow device is provided with a fool-proof identification feature.

[0021] The present application also provides a battery, comprising the anti-glue overflow device described in the above solution.

[0022] Compared with the prior art, the beneficial effects of this application are:

[0023] The present invention provides a glue blocking portion at each vacant gap formed by the battery cell, which can block the adhesive from flowing into the vacant gap, thereby avoiding the formation of a triangular prism structure. A glue application space is formed between adjacent glue blocking portions, and the adhesive can enter the glue application space to connect the housing and the battery cell, so that the setting of the glue blocking portion does not affect the adhesive fixation of the adhesive to the battery cell.

[0024] The present application also provides a battery, including the anti-overflow glue device described in the above solution. Based on the above analysis, it can be seen that the battery also has the above beneficial effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of a first assembly structure of an anti-overflow glue device and a battery cell provided in the present application;

[0027] Figure 2 A schematic diagram of a second assembly structure of the anti-overflow glue device and the battery cell provided in the present application;

[0028] Figure 3 A schematic cross-sectional view of the anti-glue overflow device provided in this application;

[0029] Figure 4 This is a schematic diagram of the structure of the anti-glue overflow device provided in this application.

[0030] In the figure: 101-anti-overflow glue device; 102-battery cell; 103-housing; 104-glue blocking part; 105-glue application space; 106-empty gap; 107-first glue blocking part; 108-second glue blocking part; 109-rounded edges; 110-first isolating member; 111-fourth glue blocking part; 112-battery cell group; 113-second isolating member; 114-connecting part; 115-positioning hole; 116-positioning protrusion; 117-anti-foolproof identification feature. DETAILED DESCRIPTION

[0031] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are 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, rather than indicating or implying 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 limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] Embodiment 1

[0035] See also Figures 1 to 4 As shown, the anti-glue overflow device 101 provided in the present application is arranged between the battery cell 102 and the shell 103, and the anti-glue overflow device 101 includes a plurality of glue blocking parts 104; the plurality of glue blocking parts 104 are arranged at intervals along the stacking direction of the battery cell 102, and a glue application space 105 is formed between adjacent glue blocking parts 104; the glue blocking parts 104 cover the vacant gaps 106 formed between the plurality of battery cells 102 and between the battery cell 102 and the shell 103 to prevent the glue from overflowing into the vacant gaps 106.

[0036] Specifically, if Figures 1 to 3 As shown, a plurality of stacked cells 102 are arranged in the battery housing 103. Since the cell 102 is formed by winding the pole pieces, the side edges of the cell 102 are in an arc shape. Even if the sides of two adjacent cells 102 are closely attached, a vacant gap 106 with a cross section similar to a triangle will be formed at the side edges of the two cells 102. Similarly, a vacant gap 106 with a cross section similar to a right triangle will also be generated at the attachment point between the cell 102 and the housing 103.

[0037] Before placing the battery cell 102 into the housing 103, glue needs to be applied to the inner wall of the housing 103. After the battery cell 102 is placed into the housing 103, the glue will flow around under the pressure of the battery cell 102, and then enter each vacant gap 106. Since the glue has a high hardness after curing, the hard and sharp triangular ridge structure formed at the vacant gap 106 can easily pierce the battery cell 102, causing the battery structure to be destroyed.

[0038] The present application sets a glue stopper 104 at each vacant gap 106 formed by the battery cell 102, and the glue stopper 104 can prevent the adhesive from flowing into the vacant gap 106, thereby avoiding the formation of a triangular prism structure. A glue application space 105 is formed between adjacent glue stoppers 104, and the adhesive can enter the glue application space 105 to connect the housing 103 and the battery cell 102, so that the setting of the glue stopper 104 does not affect the adhesive fixation of the adhesive to the battery cell 102.

[0039] The anti-glue overflow device 101 provided in the present application can prevent the glue from overflowing into the vacant gap 106 and solidifying to form a sharp structure that pierces the battery cell 102 by setting a glue blocking portion 104 to cover the vacant gap 106, thereby improving the safety and reliability of the battery without affecting the bonding effect on the battery cell 102.

[0040] In an optional scheme of this embodiment, the multiple rubber blocking portions 104 include a first rubber blocking portion 107 and / or a second rubber blocking portion 108; the width of the first rubber blocking portion 107 is greater than or equal to a first preset width, which is the sum of the radii of the edge fillets 109 of two adjacent battery cells 102; the width of the second rubber blocking portion 108 is greater than or equal to a second preset width, which is the sum of the radii of the edge fillets 109 of two adjacent battery cells 102 and the thickness of the first isolation member 110, and the first isolation member 110 is located between two adjacent battery cells 102.

[0041] In this embodiment, the arrangement of the first rubber stopper 107 and the second rubber stopper 108 needs to be determined according to the arrangement of the first isolation member 110. Figures 1 to 3 As shown, among the eight battery cells 102 shown in the figure, every two battery cells 102 form a battery cell group 112, and in a battery cell group 112, two battery cells 102 are directly attached to each other. A first spacer 110 is provided between adjacent battery cell groups 112. Specifically, the first spacer 110 is made of foam, which can absorb assembly tolerances in the stacking direction of the battery cells 102, and absorb impact forces when the structure encounters mechanical abuse conditions such as vibration and impact.

[0042] by Figure 3Taking the structure shown as an example, at the position where two battery cells 102 are directly attached, the vacant gap 106 is formed by the arc-shaped side edges of the two adjacent battery cells 102. Correspondingly, the width of the first rubber stopper 107 arranged therein is relatively narrow, and can be at least equal to the sum of the radii of the edge fillets 109 of the two adjacent battery cells 102, so as to cover the vacant gap 106 therein. In the vacant gap 106 where the first isolating member 110 is arranged, the vacant gap 106 is formed by the arc-shaped side edges of the battery cells 102 located on both sides of the first isolating member 110 and the surface of the first isolating member 110. The width of the second rubber stopper 108 arranged therein needs to take into account the thickness of the first isolating member 110. The width of the second rubber stopper 108 can be at least equal to the sum of the thickness of the first isolating member 110 and the radii of the edge fillets 109 of the two adjacent battery cells 102, so as to cover the vacant gap 106 therein.

[0043] In an optional scheme of this embodiment, the multiple rubber blocking parts 104 also include a third rubber blocking part 104 and / or a fourth rubber blocking part 111; the width of the third rubber blocking part 104 is greater than or equal to a third preset width, and the third preset width is the radius of the edge fillet 109 of the battery cell 102; the width of the fourth rubber blocking part 111 is greater than or equal to a fourth preset width, and the fourth preset width is the sum of the radius of the edge fillet 109 of the battery cell 102 and the thickness of the second isolation member 113, and the second isolation member 113 is located between the battery cell 102 and the shell 103.

[0044] In this embodiment, the configuration of the third rubber stopper 104 and the fourth rubber stopper 111 needs to be determined according to the configuration of the second isolation member 113. Figure 3 As shown, a second insulating member 113 is provided between the battery cell group 112 and the shell 103, and the vacant gap 106 there is formed by the arc-shaped side edges of the battery cell 102 and the surface of the second insulating member 113. Since the thickness of the second insulating member 113 is relatively thin, the fourth rubber blocking portion 111 provided there also covers the surface of the second insulating member 113 and extends to the side wall of the shell 103. Therefore, the width of the fourth rubber blocking portion 111 can be at least equal to the sum of the thickness of the second insulating member 113 and the radius of the edge fillet 109 of the battery cell 102, so as to achieve coverage of the vacant gap 106 there.

[0045] When the battery cell 102 and the shell 103 are directly attached, the vacant gap 106 is formed by the arc-shaped side edge of the battery cell 102 and the side wall of the shell 103. At this time, a third adhesive stopper 104 is provided at this position, and the width of the third adhesive stopper 104 is relatively narrow, at least equal to the radius of the edge fillet 109 of the battery cell 102, so as to cover the vacant gap 106 at this location.

[0046] Specifically, the second spacer 113 is formed of foam, which can absorb assembly tolerances in the stacking direction of the battery cells 102 and absorb impact forces when the structure encounters mechanical abuse conditions such as vibration and impact.

[0047] In an optional solution of this embodiment, the anti-overflow glue device 101 also includes a connecting part 114; the connecting part 114 is used to connect multiple glue blocking parts 104; the connecting parts 114 are provided at both ends of the multiple glue blocking parts 104 in the length direction; and / or at least one connecting part 114 is provided in the middle of the multiple glue blocking parts 104 in the length direction.

[0048] In this embodiment, if Figure 4 As shown, the multiple glue blocking parts 104 in the figure are arranged in parallel, and the multiple glue blocking parts 104 cover each vacant gap 106 respectively. Connecting parts 114 are provided at both ends in the length direction of the multiple glue blocking parts 104, so that the anti-overflow glue device 101 forms a frame-shaped structure, and the structural strength is more stable to prevent deformation. Since the length of the battery cell 102 is relatively long, the length of the glue blocking part 104 covering the vacant gap 106 is also relatively long accordingly. Two connecting parts 114 are provided in the middle part in the length direction of the multiple glue blocking parts 104 to further enhance the stability of the structure.

[0049] Figure 4 The rubber blocking portion 104 and the connecting portion 114 shown in the figure are perpendicular to each other, and the rubber blocking portion 104 and the connecting portion 114 can also be set in a non-perpendicular state according to actual conditions, as long as the connecting portion 114 can connect and fix multiple rubber blocking portions 104. The connecting portion 114 shown in the figure penetrates the overall structure of multiple rubber blocking portions 104, and the connecting portion 114 can also be set not to penetrate the entire structure according to actual conditions.

[0050] In an optional solution of this embodiment, the glue blocking portion 104 is integrally formed with the connecting portion 114. Optionally, the material of the anti-overflow glue device 101 is a breathable structure with pores; the anti-overflow glue device 101 is an elastic body.

[0051] In this embodiment, the anti-overflow glue device 101 can be made of foam so that the anti-overflow glue device 101 has a certain elasticity. Figure 4 As shown, a square hole is opened on the foam material to form a glue application space 105, and the circumference of the square hole forms a longitudinal glue blocking portion 104 structure and a transverse connecting portion 114 structure. Since the anti-overflow glue device 101 has a certain elasticity, it can absorb the assembly tolerance well, and to a certain extent absorb part of the impact force when the structure encounters mechanical abuse conditions such as vibration and impact. Even if the anti-overflow glue device 101 is compressed, it has a certain height, and the rectangular glue application space 105 formed is the accommodation space for the glue, and this area can be fully filled by controlling the amount of glue applied. And the shape of the glue can be controlled by changing the shape of the hole.

[0052] Since the foam used to manufacture the anti-overflow glue device 101 is a breathable structure with pores, for single-component adhesives that require moisture curing, whether it is the longitudinal glue blocking part 104, the transverse connecting part 114 or other parts, there is a path for moisture to enter the adhesive layer and react with the adhesive to promote its curing, which can improve the quality and reliability of the adhesive and reduce the difficulty of the process.

[0053] Embodiment 2

[0054] The anti-glue overflow device in the second embodiment is an improvement on the above embodiment, and the technical contents disclosed in the above embodiment will not be described repeatedly, and the contents disclosed in the above embodiment also belong to the contents disclosed in the second embodiment.

[0055] In an optional scheme of this embodiment, the anti-overflow glue device 101 also includes a positioning component; the positioning component includes a protruding structure and an embedded structure, one of the shell 103 and the glue blocking part 104 is provided with a protruding structure, and the other is provided with an embedded structure, and the protruding structure is placed in the embedded structure to position and install the glue blocking part 104 on the shell 103.

[0056] In this embodiment, if Figure 4 As shown, positioning holes 115 (embedded structures) are provided at both ends of the anti-glue overflow device 101 in the length direction, and positioning protrusions 116 are correspondingly provided on the inner wall of the shell 103. When the anti-glue overflow device 101 is placed on the inner wall of the shell 103, the positioning holes 115 are sleeved on the positioning protrusions 116 to make the installation position of the anti-glue overflow device 101 more accurate, so that the glue blocking part 104 can cover each vacant gap 106 accordingly to prevent the glue from overflowing into the vacant gap 106.

[0057] In an optional scheme of this embodiment, an adhesive layer is provided on the side of the anti-glue overflow device 101 facing the shell 103. After the anti-glue overflow device 101 is placed on the inner wall of the shell 103, the anti-glue overflow device 101 can be bonded to the inner wall of the shell 103 to fix the anti-glue overflow device 101, so that the battery cell 102 placed on the anti-glue overflow device 101 is not easily displaced from the shell 103, and the battery cell 102 is more firmly fixed.

[0058] In an optional solution of this embodiment, the anti-glue overflow device 101 is provided with a fool-proof identification feature 117 .

[0059] In this embodiment, Figure 4 A triangular hole is formed in the connecting portion 114 at one end of the glue blocking portion 104 to form a foolproof identification feature 117 of the anti-glue overflow device 101. Other methods such as pasting a mark can also be used to achieve the foolproof effect. When the production staff places the anti-glue overflow device 101 on the inner wall of the housing 103, the foolproof identification feature 117 serves to indicate the direction to prevent the anti-glue overflow device 101 from being installed incorrectly or upside down.

[0060] Embodiment 3

[0061] Embodiment 3 of the present application provides a battery, including the anti-glue overflow device of any of the above embodiments, and thus has all the beneficial technical effects of the anti-glue overflow device of any of the above embodiments, which will not be elaborated here.

[0062] Optionally, anti-glue overflow devices 101 are provided on two opposite inner walls of the battery housing 103 .

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; 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. In addition, a person skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments means being within the scope of the present application and forming different embodiments.

Claims

1. A glue overflow prevention device, arranged between the battery cell and the housing, characterized in that: The anti-overflow glue device includes a plurality of glue blocking parts; The plurality of glue blocking portions are arranged at intervals along the stacking direction of the battery core, and glue application spaces are formed between adjacent glue blocking portions; The plurality of adhesive blocking parts cover the vacant gaps formed between the plurality of battery cells and between the battery cells and the shell, so as to prevent adhesive from overflowing into the vacant gaps.

2. The anti-glue overflow device according to claim 1, characterized in that: The plurality of rubber blocking portions include a first rubber blocking portion and / or a second rubber blocking portion; The width of the first glue blocking portion is greater than or equal to a first preset width, and the first preset width is the sum of the radius of the edge fillets of two adjacent battery cells; The width of the second glue blocking portion is greater than or equal to a second preset width, the second preset width is the sum of the edge fillet radius of two adjacent battery cells and the thickness of the first isolation member, and the first isolation member is located between the two adjacent battery cells.

3. The anti-glue overflow device according to claim 2, characterized in that: The plurality of rubber blocking portions further include a third rubber blocking portion and / or a fourth rubber blocking portion; The width of the third glue stop portion is greater than or equal to a third preset width, and the third preset width is the fillet radius of the edge of the battery cell; The width of the fourth glue stopper is greater than or equal to a fourth preset width, the fourth preset width is the sum of the edge fillet radius of the battery cell and the thickness of the second isolating member, and the second isolating member is located between the battery cell and the shell.

4. The anti-glue overflow device according to claim 3, characterized in that: Also includes a connecting portion; The connecting portion is used to connect at least two of the rubber blocking portions; the connecting portion is provided at both ends of the plurality of rubber blocking portions in the length direction; and / or at least one of the connecting portions is provided in the middle of the plurality of rubber blocking portions in the length direction.

5. The anti-glue overflow device according to claim 4, characterized in that: The rubber blocking portion and the connecting portion are integrally formed.

6. The anti-glue overflow device according to claim 1, characterized in that: The material of the anti-overflow glue device is a breathable structure with pores; the anti-overflow glue device is an elastomer.

7. The anti-glue overflow device according to claim 1, characterized in that: Also included is a positioning component; The positioning assembly includes a protruding structure and an embedded structure. One of the shell and the rubber blocking part is provided with the protruding structure, and the other is provided with the embedded structure. The protruding structure is placed in the embedded structure to position and install the rubber blocking part on the shell.

8. The anti-glue overflow device according to claim 7, characterized in that: An adhesive layer is arranged on one side of the anti-overflow glue device facing the shell.

9. The anti-glue overflow device according to claim 1, characterized in that: The anti-overflow glue device is provided with a fool-proof identification feature.

10. A battery, characterized in that: The invention comprises a glue overflow prevention device as claimed in any one of claims 1 to 9.

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