Insulating part and battery

Abstract

The invention relates to the technical field of batteries, in particular to an insulating part and a battery, the battery comprises a shell and a pole group, the insulating part comprises an attached plate body and a partition part, and the attached plate body is attached to the side, facing the pole group, of the shell so as to be used for insulation of the shell and the pole group. The shell is provided with a liquid injection hole penetrating through the shell in the first direction, the partition part protrudes towards the side away from the shell in the first direction, and the partition part covers the side, facing the pole group, of the liquid injection hole. According to the insulating part and the battery provided by the invention, even if the internal structure of the battery shell is close to the liquid injection hole under the action of negative pressure airflow, the insulating part can ensure the smoothness of the liquid injection hole by virtue of the blocking effect of the blocking part, and the internal structure of the battery shell is effectively blocked; and the probability that the internal structure of the battery shell is in contact with the shell through the liquid injection hole is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an insulating component and a battery. Background Art

[0002] During the battery filling process, negative pressure usually occurs inside the battery shell at the filling hole, and the structure inside the battery shell (for example, the tabs, electrical connectors, etc.) is very likely to block the filling hole under the action of negative pressure airflow, which not only affects the discharge of excess electrolyte from the filling hole, but also easily causes the structure inside the shell to overlap with the exposed part of the cover near the filling hole, causing the cover to leak electricity and even cause the battery to short-circuit. This greatly affects the safety of the operation of negative pressure sucking out excess electrolyte in the battery. Summary of the invention

[0003] The purpose of this application is to provide an insulating part and a battery, so as to solve the problem that during the battery filling process, negative pressure usually occurs inside the battery shell at the filling hole, and the structure inside the battery shell (for example, the pole ear, the electrical connection piece, etc.) is very easy to block the filling hole under the action of the negative pressure airflow, which not only affects the discharge of excess electrolyte from the filling hole, but also easily causes the structure inside the shell to overlap with the exposed part of the cover plate near the filling hole, causing the cover plate to leak electricity and even causing the battery to short-circuit. This greatly affects the technical problem of the safety of the operation of negative pressure sucking out excess electrolyte in the battery.

[0004] According to a first aspect of the present application, an insulating member is provided for a battery, the battery comprising a housing and a pole group, the insulating member comprising an attachment plate body and a barrier portion, the attachment plate body being attached to a side of the housing facing the pole group to insulate the housing and the pole group; The shell is provided with a liquid injection hole penetrating the shell along a first direction, the baffle is fixedly connected to the attachment plate body, and the baffle protrudes along the first direction to a side away from the shell, and the baffle is covered on a side of the liquid injection hole facing the pole group.

[0005] Preferably, the insulating member comprises a liquid-passing gap, the liquid-passing gap penetrates the insulating member along the first direction, and at least a portion of the liquid-passing gap is arranged opposite to the liquid injection hole along the first direction.

[0006] Preferably, the insulating member extends along a second direction, the liquid gap extends along a third direction, the second direction and the third direction intersect each other, and the first direction is perpendicular to a plane defined by the second direction and the third direction.

[0007] Preferably, the size of the liquid gap in the second direction is 1.5 to 3 times the diameter of the injection hole.

[0008] Preferably, in the third direction, the size of the liquid gap is smaller than the size of the insulating member.

[0009] Preferably, the liquid-transmitting gap penetrates the insulating member along the third direction.

[0010] Preferably, when the insulating member and the shell are in an attached state, the blocking portion forms a spacing space between the insulating member and the shell, and the spacing space is communicated with the liquid-transmitting gap.

[0011] Preferably, a dimension of the spacing space in the first direction is 0.3 to 0.8 times the maximum dimension of the insulating element in the first direction.

[0012] Preferably, the attachment plate body and the baffle portion are integrally connected; The shell comprises a shell body and a cover plate body, and the injection hole is arranged on the shell body and / or the cover plate body.

[0013] According to the second aspect of the present application, a battery is provided, comprising the above-mentioned cover plate body, the above-mentioned electrode group and the insulating member described in any of the above-mentioned technical solutions, and thus having all the beneficial technical effects of the insulating member, which will not be repeated here.

[0014] Compared with the prior art, the beneficial effects of this application are: The insulating member provided in the present application is provided with a blocking portion on the insulating member and covered on the side of the injection hole facing the electrode group, so that the blocking portion protrudes along the first direction to the side away from the cover body. In this way, even if the internal structure of the battery shell approaches the injection hole under the action of the negative pressure airflow, the insulating member can rely on the blocking effect of the blocking portion to ensure the smooth flow of the injection hole, and effectively block the internal structure of the battery shell, thereby reducing the probability of the internal structure of the battery shell contacting the cover body through the injection hole.

[0015] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 A schematic cross-sectional view of an insulating member provided in an embodiment of the present application; Figure 2 for Figure 1 An enlarged schematic diagram of the structure of the insulating member provided at position C; Figure 3 A schematic diagram of the exploded structure of the insulating member provided in the embodiment of the present application; Figure 4 A schematic diagram of the isometric structure of an insulating member provided in an embodiment of the present application; Figure 5 This is another isometric structural schematic diagram of the insulating component provided in an embodiment of the present application.

[0018] Reference numerals: 11-attached plate body; 12-blocking part; 121-interval space; 13-liquid gap; 14-grid part; 15-limiting protrusion; 2-cover plate body; 21-liquid injection hole; 22-explosion-proof valve; 23-pole.

[0019] F1-first direction; F2-second direction; F3-third direction. DETAILED DESCRIPTION

[0020] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0021] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0022] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0023] 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.

[0024] 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.

[0025] Refer to the following Figures 1 to 5 An insulating member and a battery according to some embodiments of the present application are described.

[0026] See also Figures 1 to 5 As shown, an embodiment of the first aspect of the present application provides an insulating member for a battery, the battery comprising a shell and a pole group, the insulating member comprising an attachment plate body 11 and a barrier portion 12, the attachment plate body 11 being attached to a side of the shell facing the pole group to insulate the shell and the pole group. The shell is provided with a liquid injection hole 21 penetrating the shell along a first direction F1, the barrier portion 12 protrudes toward a side away from the shell along the first direction F1, and the barrier portion 12 is provided on a side of the liquid injection hole 21 facing the pole group.

[0027] According to the insulating member provided by the above-mentioned technical features, a blocking portion 12 is provided on the insulating member to cover the side of the injection hole 21 facing the electrode group, so that the blocking portion 12 protrudes along the first direction F1 to the side away from the shell. In this way, even if the internal structure of the battery shell approaches the injection hole 21 under the action of negative pressure airflow, the insulating member can rely on the blocking effect of the blocking portion 12 to ensure the smooth flow of the injection hole 21, and effectively block the internal structure of the battery shell, thereby reducing the probability of the internal structure of the battery shell contacting the shell through the injection hole 21.

[0028] Preferably, the shell may include a shell body and a cover plate body 2, and the shell body and the cover plate body 2 may be arranged to form a closed space for accommodating the pole group.

[0029] like Figures 1 to 5 As shown, the figure shows an example in which the above-mentioned injection hole 21 is arranged on the cover body 2. In other words, the above-mentioned insulating member is attached to the side of the cover body facing the pole group to achieve insulation between the cover body and the pole group.

[0030] However, it is not limited to this. As not shown in the figure, the above-mentioned injection hole can also be arranged on one side wall of the shell body. Correspondingly, the above-mentioned insulating member can be attached to the inner side of the side wall of the shell body where the injection hole is located to achieve insulation between the side wall and the pole group.

[0031] like Figures 1 to 5As shown, the insulating member will be described in detail below by taking the example that the injection hole 21 is arranged on the cover plate body 2 .

[0032] like Figures 1 to 5 As shown, F1 shown in the figure may be an example of the first direction F1. Preferably, the first direction F1 may be perpendicular to the cover body 2. For ease of description, two directions intersecting each other on a plane parallel to the cover body 2 are defined as a second direction F2 and a third direction F3. F2 shown in the figure may be an example of the second direction F2, and F3 shown in the figure may be an example of the third direction F3. Figures 1 to 5 Taking the above-mentioned insulating member and cover body 2 as being suitable for square batteries as an example, the above-mentioned first direction F1 can be the length direction of the square battery, the second direction F2 can be the width direction of the square battery (that is, the cover body 2 extends along the second direction F2), and the third direction F3 can be the thickness direction of the square battery (that is, the third direction F3 can be set perpendicular to the second direction F2). However, it is not limited to this. As long as the above-mentioned barrier portion 12 is set to prevent the internal structure of the battery from being blocked or contacting the injection hole 21, the above-mentioned insulating member can also be adapted to batteries of other shapes, such as cylindrical batteries or other special-shaped batteries.

[0033] Optionally, not shown in the figures, the barrier portion may be provided with a liquid-permeable mesh to prevent the barrier portion from interfering with the inflow and outflow of liquid from the injection hole.

[0034] Preferably, if Figures 2 to 5 As shown, the above-mentioned insulating member may include a liquid gap 13, which passes through the insulating member along the first direction F1, and at least a part of the liquid gap 13 is arranged opposite to the injection hole 21 along the first direction F1, so as to further ensure the smoothness of the injection of the injection hole 21.

[0035] Preferably, if Figure 4 and Figure 5 As shown, the liquid-passing gap 13 may extend along a third direction F3 to facilitate manufacturing and positioning of the liquid-passing gap 13 .

[0036] Preferably, as shown in Table 1 and Figure 2 As shown, the size of the above-mentioned liquid gap 13 in the second direction F2 (i.e., the value B shown in the figure) is 1.5 to 3 times the diameter of the injection hole 21 (i.e., the value A shown in the figure). In other words, 1.5≤B / A≤3, so that the smoothness of the injection hole 21 is ensured, and the stability of the fit between the insulating member and the cover body 2 under the flushing of the liquid in and out of the injection hole 21 can be effectively ensured, and the probability of the internal structure of the battery contacting the cover body 2 through the liquid gap 13 under negative pressure can be effectively reduced.

[0037] Table 1:

[0038] like Figure 4 and Figure 5 As shown, two embodiments of the liquid gap 13 are shown in the figure: Embodiment 1: Figure 4 As shown in the figure, the liquid gap 13 penetrates the insulating part along the third direction F3. In other words, the above-mentioned insulating part is divided into two parts by the liquid gap 13. In this way, the insulating part can be manufactured separately through the two parts, and then assembled by fitting with the cover body 2. In this way, not only the mold size of the insulating part is reduced, but also the manufacturing of the insulating part is more convenient; moreover, dividing the insulating part into two parts can increase the replaceability of each independent part of the insulating part and reduce the error cost (the error cost here can be understood as the loss caused by damage, manufacturing error, installation error, etc. of each independent part).

[0039] Embodiment 2: Figure 5 As shown in the figure, it is shown that in the third direction F3, the size of the liquid gap 13 is smaller than the size of the insulating member. In this way, the two parts of the insulating member located on both sides of the above-mentioned liquid gap 13 in the second direction F2 are connected as a whole, thereby effectively ensuring the accuracy of the liquid gap 13 and avoiding installation errors from affecting the accuracy of the liquid gap 13.

[0040] In an embodiment, preferably, Figure 1 to Figure 2 As shown, when the insulating member and the cover body 2 are in the attached state, the blocking portion 12 forms a spacing space 121 between the insulating member and the cover body 2, and the spacing space 121 is connected with the above-mentioned liquid gap 13. In this way, the spacing space 121 can not only avoid the stamping boss formed on the side of the cover body 2 facing the insulating member of the injection hole 21, thereby ensuring the fit between the attached plate body 11 and the cover body 2; and the spacing space 121 is connected with the liquid gap 13, which can effectively reduce the probability of the internal structure of the battery completely blocking the injection hole 21. Specifically, with the liquid gap 13 extending along the third direction F3, when the internal structure of the battery (such as the tab) blocks the injection hole 21 under the action of negative pressure, as long as the internal structure of the battery does not completely block the liquid gap 13, the internal part of the battery can be connected with the injection hole 21 through the unblocked part of the liquid gap 13 and the spacing space 121 in sequence, thus effectively reducing the probability of the internal structure of the battery completely blocking the injection hole 21.

[0041] Preferably, as shown in Table 2 and Figure 2As shown, the size of the above-mentioned spacing space 121 in the first direction F1 (i.e., the S value shown in the figure) is 0.3~0.8 times the maximum size of the insulating member in the first direction F1 (i.e., the T value shown in the figure). In other words, 0.3≤S / T≤0.8. In this way, it can not only ensure that the spacing space 121 can completely avoid the stamping boss formed on the side of the cover body 2 facing the insulating member by the injection hole 21, thereby avoiding interference between the stamping boss and the insulating member, but also effectively ensure that the size of the blocking portion 12 in the first direction F1 will not exceed the maximum size of the insulating member in the first direction F1, thereby avoiding interference between the blocking portion 12 and the pole group and damage to the pole group.

[0042] Table 2:

[0043] Preferably, the attachment plate body 11 and the baffle portion 12 are integrally connected to ensure the connection stability between the baffle portion 12 and the attachment plate body 11 .

[0044] Preferably, the insulating member may be made of insulating plastic (eg, PE / PP / PVC / PS, etc.), and the attachment plate body 11 and the baffle portion 12 may be integrally injection molded.

[0045] The embodiment of the second aspect of the present application further provides a battery, comprising the above-mentioned cover body 2, the above-mentioned electrode group and the insulating member described in any of the above-mentioned embodiments, and thus has all the beneficial technical effects of the insulating member, which will not be repeated here.

[0046] Preferably, although not shown in the figures, the cover plate body may be arranged to cover the end of the shell body in the first direction, and the pole group may be arranged in the shell body.

[0047] Preferably, if Figure 1 and Figure 3 The cover body 2 may also be provided with an explosion-proof valve 22, and the insulating member may also include a mesh portion 14, which is arranged opposite to the explosion-proof valve 22 in the first direction F1, and the mesh portion 14 is provided with air-permeable mesh holes that penetrate the insulating member along the first direction F1, so that the gas can be discharged to the explosion-proof valve 22 through the air-permeable mesh holes.

[0048] Preferably, if Figure 1 As shown, the dimension of the grid portion 14 in the first direction F1 is the maximum dimension of the insulating member in the first direction F1 (i.e., the T value). Thus, when the insulating member is assembled in the battery, it can abut against the electrode group through the grid portion 14 to limit the position of the electrode group in the shell body.

[0049] Preferably, if Figure 1 , Figures 3 to 5As shown, the above-mentioned insulating member may further include a limiting protrusion 15, which is arranged at both ends of the insulating member in the second direction F2, and the size of the limiting protrusion 15 in the first direction F1 is also equal to the maximum size of the insulating member in the first direction F1 (that is, the above-mentioned T value). In this way, when the insulating member is assembled in the battery, the limiting protrusion 15 can respectively abut against both ends of the end of the electrode group facing the insulating member in the second direction F2, so as to further improve the limiting stability of the insulating member to the electrode group.

[0050] Preferably, if Figure 1 , Figures 3 to 5 As shown, the mesh portion 14 may be disposed at the middle portion of the insulating member in the second direction F2.

[0051] Preferably, if Figure 1 and Figure 3 As shown, the cover body 2 may also be provided with a pole 23 , and the pole 23 may be provided on a portion of the cover body 2 corresponding to a portion of the insulating member between the grid portion 14 and the limiting protrusion 15 .

[0052] Preferably, if Figure 1 and Figure 3 As shown, the figure shows an example in which two poles 23 are provided on the cover body 2, but it is not limited thereto, and the number of poles 23 can be adaptively adjusted according to the specific structure of the battery.

[0053] Alternatively, if Figure 1 and Figure 3 As shown, the above-mentioned liquid injection hole 21 can be arranged between the pole 23 and the explosion-proof valve 22.

[0054] 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 it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An insulating member, characterized in that: Used in a battery, the battery comprising a shell and an electrode group, the insulating member comprising an attachment plate body (11) and a barrier portion (12), the attachment plate body (11) being attached to a side of the shell facing the electrode group to insulate both the shell and the electrode group; The shell is provided with a liquid injection hole (21) penetrating the shell along a first direction (F1); the baffle portion (12) is fixedly connected to the attached plate body (11); the baffle portion (12) protrudes along the first direction (F1) to a side away from the shell; and the baffle portion (12) is covered on a side of the liquid injection hole (21) facing the electrode group.

2. The insulating member according to claim 1, characterized in that The insulating member comprises a liquid-passing gap (13), the liquid-passing gap (13) penetrates the insulating member along the first direction (F1), and at least a portion of the liquid-passing gap (13) is arranged opposite to the liquid injection hole (21) along the first direction (F1).

3. The insulating member according to claim 2, characterized in that: The insulating member extends along a second direction (F2), the liquid gap (13) extends along a third direction (F3), the second direction (F2) and the third direction (F3) intersect each other, and the first direction (F1) is perpendicular to a plane defined by the second direction (F2) and the third direction (F3).

4. The insulating member according to claim 3, characterized in that The size of the liquid gap (13) in the second direction (F2) is 1.5 to 3 times the diameter of the liquid injection hole (21).

5. The insulating member according to claim 3, characterized in that: In the third direction (F3), the size of the liquid gap (13) is smaller than the size of the insulating member.

6. The insulating member according to claim 3, characterized in that: The liquid-passing gap (13) penetrates the insulating member along the third direction (F3).

7. The insulating member according to claim 2, characterized in that: When the insulating member and the shell are in an attached state, the blocking portion (12) forms a spacing space (121) between the insulating member and the shell, and the spacing space (121) is in communication with the liquid-passing gap (13).

8. The insulating member according to claim 7, characterized in that The dimension of the separation space (121) in the first direction (F1) is 0.3 to 0.8 times the maximum dimension of the insulating member in the first direction (F1).

9. The insulating member according to claim 1, characterized in that: The attached plate body (11) and the baffle portion (12) are integrally connected; The shell comprises a shell body and a cover plate body (2), and the injection hole is arranged on the shell body and / or the cover plate body (2).

10. A battery, characterized in that: The invention comprises the housing, the pole group and the insulating member according to any one of claims 1 to 9.

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