Safety assembly and battery

Abstract

The utility model discloses a safety assembly and a battery, comprising: a body comprising a first surface and a second surface opposite to each other; the temperature sensing piece is arranged on the first surface; the first adapter sheet is connected to one side of the body; the first insulating layer is arranged on the side, away from the first face, of the temperature sensing piece, the circumferential edge portion of the first insulating layer is flush with or exceeds the circumferential edge portion of the temperature sensing piece, and the first insulating layer covers at least part of the first switching piece; the bonding piece is located on the side, away from the temperature sensing piece, of the first insulating layer. By additionally arranging the first insulating layer, the first insulating layer completely covers one side, deviating from the first surface, of the temperature sensing piece, so that the temperature sensing piece is prevented from being exposed outside, short circuit, battery corrosion and the like caused by contact between the temperature sensing piece and the battery can be prevented, and when the safety assembly is connected with the top sealing edge of the battery, the temperature sensing piece is prevented from being exposed without being shielded by the top sealing edge; therefore, the height of the top sealing edge is not limited by the height of the temperature sensing piece, and the height of the top sealing edge can be reduced so as to improve the energy density of the battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery structure technical field, more specifically, relate to a safety assembly, furthermore, the utility model relates to a battery comprising the safety assembly. BACKGROUND

[0002] In the battery field, a safety assembly, also known as a Breaker or temperature switch, is usually provided on the tab of a battery. The Breaker is a precision component for temperature and overcurrent protection of the battery, mainly used to prevent safety accidents such as battery bulging and burning caused by excessive battery temperature or large overcurrent under extreme conditions. When the Breaker is applied to the battery, a top sealing edge needs to be assembled on the battery.

[0003] In related technology, the temperature-sensing metal sheet of the Breaker limits the height of the top sealing edge, which needs to be higher than the height of the temperature-sensing metal sheet to avoid the temperature-sensing metal sheet being exposed and to avoid the temperature-sensing metal sheet being exposed and contacting the other tab or the aluminum layer of the aluminum plastic film of the battery, which may cause short circuit and battery corrosion. However, as the demand for battery energy density is increasing, the height of the top sealing edge is too high, which reduces the energy density performance of the battery.

[0004] Therefore, how to reduce the height of the top sealing edge is a problem that needs to be solved by those skilled in the art. SUMMARY

[0005] Therefore, the utility model aims to provide a safety assembly that can reduce the height of the top sealing edge.

[0006] Another object of the utility model is to provide a battery comprising the safety assembly, which can make the height of the top sealing edge lower.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] A safety assembly comprises:

[0009] A body comprising a first face and a second face facing away from each other;

[0010] A temperature-sensing element provided on the first face;

[0011] A first adapter plate connected to one side of the body;

[0012] A first insulating layer provided on the side of the temperature-sensing element facing away from the first face, the circumferential edge of the first insulating layer is flush with or exceeds the circumferential edge of the temperature-sensing element, and the first insulating layer covers at least part of the first adapter plate;

[0013] An adhesive component is located on the side of the first insulating layer opposite to the temperature sensing element.

[0014] Optionally, a notch is provided at the top edge of the first insulating layer;

[0015] Along the first direction, the bottom edge of the notch is not lower than the top edge of the temperature sensing element.

[0016] Optionally, the distance from the top edge of the first insulating layer to the top edge of the temperature sensing element is Y1, where 0 ≤ Y1 ≤ 3 mm.

[0017] Optionally, a second adapter piece is connected to the other side of the body, and the first insulating layer covers at least a portion of the second adapter piece.

[0018] Optionally, at least one of the outer surface of the first adapter piece corresponding to the second surface at the connection point between the first adapter piece and the body, and the outer surface of the second adapter piece corresponding to the second surface at the connection point between the second adapter piece and the body, is provided with a second insulating layer.

[0019] Optionally, it also includes:

[0020] The third insulating layer is disposed on the second surface at the position corresponding to the temperature sensing element, and the second insulating layer and the third insulating layer are connected as one piece or are an integral structure.

[0021] Optionally, the first insulating layer, the second insulating layer, and the third insulating layer form a first integral insulating layer;

[0022] The second insulating layer and the third insulating layer are located above or below the first insulating layer along the first direction, and the first integral insulating layer is bent from the bottom edge of the body along the first direction to cover the body. Alternatively, the second insulating layer and the third insulating layer are located on one side of the first insulating layer along the second direction, and the portion of the first integral insulating layer corresponding to the second insulating layer is bent from the side edge of the body along the second direction to cover the body.

[0023] Optionally, the first insulating layer and the second insulating layer form a second integral insulating layer;

[0024] The second insulating layer is located above or below the first insulating layer along the first direction, and the second integral insulating layer is bent from the bottom edge of the body along the first direction to cover the body; or, the second insulating layer is located on the side of the first insulating layer along the second direction, and the portion of the second integral insulating layer corresponding to the second insulating layer is bent from the side edge of the body along the second direction to cover the body.

[0025] Optionally, the first adapter piece, the body, and the second adapter piece form a U-shaped structure; and / or,

[0026] The first adapter piece, the main body, and the second adapter piece form an L-shaped structure.

[0027] A battery includes a top seal, a first tab, and any one of the aforementioned safety components, wherein the adhesive is attached to the top seal, and the safety component is electrically connected to the first tab.

[0028] Optionally, along the first direction, the top edge of the top seal is lower than the lowest position of the top edge of the first insulating layer of the safety assembly; and / or,

[0029] Along the first direction, the top edge of the top seal is lower than the top edge of the temperature sensing element; and / or,

[0030] Along the first direction, the top edge of the adhesive is lower than the top edge of the top seal.

[0031] The safety component provided by this utility model has the following beneficial effects:

[0032] By adding a first insulating layer that completely covers the side of the temperature sensor facing away from the first surface, the temperature sensor is prevented from being exposed, thus preventing short circuits and battery corrosion caused by contact between the temperature sensor and the battery. Based on this, after connecting the safety component to the top seal edge of the battery, it is not necessary to use the top seal edge of the battery to shield the temperature sensor to prevent it from being exposed. Therefore, the problem of the height of the temperature sensor limiting the height of the top seal edge can be solved. That is, the height of the top seal edge is no longer limited by the height of the temperature sensor, so the height of the top seal edge can be lowered to improve the energy density performance of the battery. At the same time, when connecting the safety component to the top seal edge of the battery, the first insulating layer is connected to the top seal edge using an adhesive. It is not necessary to use an adhesive to shield the temperature sensor to prevent it from being exposed. The adhesive only needs to ensure that the safety component is connected to the top seal edge of the battery. Therefore, when the top seal edge is lowered, the adhesive can also be lowered, which helps to keep the adhesive below the top seal edge and prevent the adhesive from sticking to foreign objects or packaging trays. In addition, the first insulating layer covers at least part of the first adapter piece, that is, the first insulating layer can also be used to protect the connection between the first adapter piece and the body.

[0033] Furthermore, by providing a notch at the top edge of the first insulating layer, with the bottom edge of the notch not lower than the top edge of the temperature sensing element along the first direction, the first insulating layer can completely cover the temperature sensing element while avoiding interference with other structures by using the notch.

[0034] The battery provided by this invention includes a safety component and has the same beneficial effects as the safety component. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the first side of the safety component provided in a specific embodiment of the present invention when it is U-shaped;

[0037] Figure 2 This is a schematic diagram of the first structural design of the second side when the safety component is U-shaped.

[0038] Figure 3 This is a schematic diagram of a second structural design for the second side when the safety component is U-shaped.

[0039] Figure 4 This is a structural diagram of the first side when the safety component is L-shaped.

[0040] Figure 5 This is a schematic diagram of the first structural design of the second side when the safety component is L-shaped.

[0041] Figure 6 This is a schematic diagram of a second structural design for the second side when the safety component is L-shaped.

[0042] Figure 7 A schematic diagram showing the relative positions of the body, the temperature sensing element, and the first insulating layer;

[0043] Figure 8 This is a schematic diagram showing the connection between the safety components and the top seal of the battery.

[0044] Figure label:

[0045] 1-Body; 2-Temperature sensing element; 3-First insulating layer; 31-Notch; 4-First adapter piece; 5-Second adapter piece; 6-Second insulating layer; 7-Third insulating layer; 8-Top sealing edge; 9-Adhesive piece. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0047] The core of this invention is to provide a safety component that can reduce the height of the top seal edge. Another core aspect of this invention is to provide a battery that includes the aforementioned safety component, which allows for a lower height of the top seal edge.

[0048] It should be noted that the first direction in this embodiment of the utility model refers to the height direction, such as... Figures 1-8 The Y-axis direction in the diagram. The second direction refers to the direction perpendicular to the first direction, such as... Figures 1-7 The X-axis direction in the diagram.

[0049] Please refer to Figure 1 and Figure 4 This utility model embodiment provides a safety component, including a body 1, a temperature sensing element 2, a first adapter piece 4, a first insulating layer 3, and an adhesive element 9 (such as...). Figure 8 As shown), the body 1 includes a first surface and a second surface that are opposite to each other; a temperature sensing element 2 is disposed on the first surface; a first adapter piece 4 is connected to one side of the body 1; a first insulating layer 3 is disposed on the side of the temperature sensing element 2 that is opposite to the first surface, the circumferential edge of the first insulating layer 3 is flush with or extends beyond the circumferential edge of the temperature sensing element 2, and the first insulating layer 3 covers at least part of the first adapter piece 4; an adhesive 9 is located on the side of the first insulating layer 3 that is opposite to the temperature sensing element 2.

[0050] In other words, by adding a first insulating layer 3 and making the first insulating layer 3 completely cover the side of the temperature sensing element 2 away from the first surface, the temperature sensing element 2 is prevented from being exposed, thereby preventing the temperature sensing element 2 from contacting the battery and causing short circuits, battery corrosion, etc. Based on this, after the safety component is connected to the top sealing edge 8 of the battery, it is not necessary to use the top sealing edge 8 of the battery to cover the temperature sensing element 2 to prevent the temperature sensing element 2 from being exposed.

[0051] Therefore, the problem of the height of the temperature sensing element 2 limiting the height of the top sealing edge 8 can be solved. That is, the height of the top sealing edge 8 is no longer limited by the height of the temperature sensing element 2, so the height of the top sealing edge 8 can be reduced to improve the energy density performance of the battery.

[0052] Meanwhile, when the safety component is connected to the top sealing edge 8 of the battery, the first insulating layer 3 is connected to the top sealing edge 8 using the adhesive 9. There is no need to use the adhesive 9 to cover the temperature sensing element 2 to prevent the temperature sensing element 2 from being exposed. Thus, the adhesive 9 only needs to ensure that the safety component is connected to the top sealing edge 8 of the battery. Therefore, when the top sealing edge 8 is made lower, the adhesive 9 can be made lower, which is beneficial to make the adhesive 9 lower than the top sealing edge 8 and prevent the adhesive 9 from exceeding the top sealing edge 8 and sticking to foreign objects or packaging trays.

[0053] In addition, the first insulating layer 3 covers at least part of the first adapter piece 4, that is, the first insulating layer 3 can also be used to protect the connection between the first adapter piece 4 and the body 1.

[0054] Additionally, please continue to refer to Figure 1 and Figure 4 In order to avoid interference between the top edge of the first insulating layer 3 and other structures, in some embodiments, the top edge of the first insulating layer 3 is provided with a notch 31, and along the first direction, the bottom edge of the notch 31 is not lower than the top edge of the temperature sensing element 2.

[0055] In other words, this embodiment avoids interference between the top edge of the first insulating layer 3 and other structures by providing a notch 31 at the top edge of the first insulating layer 3 along the first direction, using the notch 31 to avoid interference with other structures. It should be noted that after the notch 31 is provided at the top edge of the first insulating layer 3, the bottom edge of the notch 31 is not lower than the top edge of the temperature sensing element 2. That is, after the notch 31 is provided, the first insulating layer 3 still completely covers the temperature sensing element 2 to ensure that the temperature sensing element 2 is not exposed.

[0056] Additionally, please refer to Figure 7 In order to prevent the temperature sensing element 2 from being exposed while ensuring that the top edge of the first insulating layer 3 has a suitable height so as to avoid affecting other structures, in some embodiments, the distance between the top edge of the first insulating layer 3 and the top edge of the temperature sensing element 2 is Y1, where 0≤Y1≤3mm.

[0057] For further information, please continue to refer to [link / reference]. Figure 7 When the top edge of the first insulating layer 3 is provided with a notch 31, the height of the notch 31 is Y2, 0≤Y2≤3mm, to ensure that Y1-Y2≥0, that is, the lowest position of the notch 31 is not lower than the top edge of the temperature sensing element 2.

[0058] It should be noted that in some embodiments, Y1 and Y2 can also be other value ranges, such as 0≤Y1≤4mm, or 0≤Y1≤5mm, or 0≤Y1≤6mm, or other value ranges. Correspondingly, 0≤Y2≤4mm, or 0≤Y2≤5mm, or 0≤Y2≤6mm, as long as Y1-Y2≥0 is ensured.

[0059] In some embodiments, please refer to Figure 1 and Figure 4 In some embodiments, a second adapter piece 5 is connected to the other side of the main body 1, and the first insulating layer 3 covers at least a portion of the second adapter piece 5. That is, in this embodiment, the first insulating layer 3 not only covers the temperature sensing element 2, but also extends to the positions of the first adapter piece 4 and the second adapter piece 5 corresponding to the main body 1, so that the first insulating layer 3 simultaneously covers at least a portion of the first adapter piece 4 and at least a portion of the second adapter piece 5, thereby protecting the connection points of the first adapter piece 4 and the second adapter piece 5 with the main body 1 respectively; moreover, the first insulating layer 3, as an integral structural component, simultaneously covers the temperature sensing element 2, at least a portion of the first adapter piece 4, and at least a portion of the adapter piece 5, avoiding the need to separately protect the first adapter piece 4 and the second adapter piece 5, making the structure simple, easy to assemble, convenient to process and manufacture, and improving production efficiency.

[0060] In some embodiments, please refer to Figure 2 and Figure 5 In order to protect the side of the connection between the first adapter piece 4 and the body 1 corresponding to the second surface and / or the side of the connection between the second adapter piece 5 and the body 1 corresponding to the second surface, in some embodiments, at least one of the outer side of the connection between the first adapter piece 4 and the body 1 corresponding to the second surface and the outer side of the connection between the second adapter piece 5 and the body 1 corresponding to the second surface is provided with a second insulating layer 6.

[0061] That is, in this embodiment, by setting a second insulating layer 6, the side of the connection between the first adapter piece 4 and the main body 1 corresponding to the second surface and / or the side of the connection between the second adapter piece 5 and the main body 1 corresponding to the second surface are protected.

[0062] Thus, if the second side of the body 1 does not have an insulating layer at the position corresponding to the temperature sensing element 2, the thickness of the entire safety assembly is thinner at the body 1 and thicker at the connection between the first adapter 4 and the body 1 and / or the connection between the second adapter 5 and the body 1, which helps to reduce the thickness of the safety assembly.

[0063] In some embodiments, please refer to Figure 3 and Figure 6 In some embodiments, the safety component further includes a third insulating layer 7, which is disposed on the second side of the body 1 at the position corresponding to the temperature sensing element 2. That is, an insulating layer is also provided on the second side of the body 1 at the position corresponding to the temperature sensing element 2, which helps to make the safety component have a more uniform thickness from the body 1 to the connection between the first adapter piece 4 and the body 1 and / or the connection between the second adapter piece 5 and the body 1.

[0064] Furthermore, such as Figure 3 and Figure 6As shown, in some embodiments, the second insulating layer 6 and the third insulating layer 7 are connected as a single unit or form an integral structure. That is, when the second insulating layer 6 is provided on at least one of the outer surface of the second side corresponding to the connection between the first adapter piece 4 and the body 1, and on the outer surface of the second side corresponding to the connection between the second adapter piece 5 and the body 1, and the third insulating layer 7 is provided on the second side of the body 1 at the position corresponding to the temperature sensing element 2, the second insulating layer 6 and the third insulating layer 7 are connected to form a single unit. This facilitates manufacturing and improves production efficiency.

[0065] In addition, for ease of assembly, in some embodiments, the first insulating layer 3, the second insulating layer 6, and the third insulating layer 7 form a first integral insulating layer. The second insulating layer 6 and the third insulating layer 7 are located on the upper or lower side of the first insulating layer 3 along the first direction. The first integral insulating layer is bent from the bottom edge of the body 1 along the first direction and covers the body 1. Alternatively, the second insulating layer 6 and the third insulating layer 7 are located on one side of the first insulating layer 3 along the second direction. The portion of the first integral insulating layer corresponding to the second insulating layer 6 and the third insulating layer 7 is bent from the side edge of the body 1 along the second direction and covers the body 1.

[0066] In other words, in this embodiment, the first insulating layer 3, the second insulating layer 6, and the third insulating layer 7 are a single insulating layer, namely the first integral insulating layer. When connecting the first integral insulating layer to the body 1, the connection between the first adapter piece 4 and the body 1, and the connection between the second adapter piece 5 and the body 1, the first integral insulating layer can be bent from the bottom edge of the body 1 along the first direction to cover the first and second surfaces of the body 1, or the first integral insulating layer can be bent from the side edge of the body 1 along the second direction to cover the first and second surfaces of the body 1.

[0067] It is understandable that different folding methods during the installation of the first integral insulating layer result in different shapes of the first integral insulating layer. In other words, the shape of the first integral insulating layer determines the folding method during installation. For example, when the second insulating layer 6 and the third insulating layer 7 are located on the upper or lower side of the first insulating layer 3 along the first direction, the first integral insulating layer needs to be bent from the bottom edge of the body 1 along the first direction to cover the body 1 during installation. When the second insulating layer 6 and the third insulating layer 7 are located on one side of the first insulating layer 3 along the second direction, the portion of the first integral insulating layer corresponding to the second insulating layer 6 and the third insulating layer 7 is bent from the side edge of the body 1 along the second direction to cover the body 1.

[0068] In addition, when the third insulating layer 7 is not present, in some embodiments, the first insulating layer 3 and the second insulating layer 6 form a second integral insulating layer. The second insulating layer 6 is located on the upper or lower side of the first insulating layer 3 along the first direction. The second integral insulating layer is bent from the bottom edge of the body 1 along the first direction and covers the body 1. Alternatively, the second insulating layer 6 is located on the side of the first insulating layer 3 along the second direction. The portion of the second integral insulating layer corresponding to the second insulating layer 6 is bent from the side edge of the body 1 along the second direction and covers the body 1.

[0069] In other words, in this embodiment, the first insulating layer 3 and the second insulating layer 6 are a single insulating layer, that is, the second integral insulating layer. When connecting the second integral insulating layer to the body 1, the connection between the first adapter piece 4 and the body 1, and the connection between the second adapter piece 5 and the body 1, the second integral insulating layer can be bent from the bottom edge of the body 1 along the first direction to cover the first and second surfaces of the body 1, or the second integral insulating layer can be bent from the side edge of the body 1 along the second direction to cover the first and second surfaces of the body 1.

[0070] It is understandable that different folding methods during the installation of the second integral insulating layer result in different shapes of the second integral insulating layer. In other words, the shape of the second integral insulating layer determines the folding method during installation. For example, when the second insulating layer 6 is located above or below the first insulating layer 3 along the first direction, the second integral insulating layer is bent from the bottom edge of the body 1 along the first direction to cover the body 1.

[0071] When the second insulating layer 6 is provided on the outer side of the second surface corresponding to the connection between the first adapter piece 4 and the body 1, and the second insulating layer 6 is not provided on the outer side of the second surface corresponding to the connection between the second adapter piece 5 and the body 1, the second insulating layer 6 is located on the left side of the first insulating layer 3 along the second direction, and the part of the second integral insulating layer corresponding to the second insulating layer 6 is bent from the left edge of the body 1 along the second direction and covers the body 1.

[0072] When the outer surface of the first adapter piece 4 corresponding to the second surface of the body 1 is not provided with the second insulating layer 6, and the outer surface of the second adapter piece 5 corresponding to the second surface of the body 1 is provided with the second insulating layer 6, the second insulating layer 6 is located on the right side of the first insulating layer 3 along the second direction, and the portion of the second integral insulating layer corresponding to the second insulating layer 6 is bent from the right edge of the body 1 along the second direction and covers the body 1. When the outer surface of the first adapter piece 4 corresponding to the second surface of the body 1 and the outer surface of the second surface of the second surface of the body 1 are both provided with the second insulating layer 6, the second insulating layer 6 is located on the left and right sides of the first insulating layer 3 along the second direction, respectively, and the portion of the second integral insulating layer corresponding to the second insulating layer 6 is bent from the left and right edges of the body 1 along the second direction and covers the body 1, respectively.

[0073] It should be noted that the above embodiments do not limit the specific shapes formed by the first adapter piece 4, the main body 1, and the second adapter piece 5.

[0074] For example, in some embodiments, the first adapter piece 4, the body 1, and the second adapter piece 5 form a U-shaped structure.

[0075] When the first adapter piece 4, the body 1, and the second adapter piece 5 form a U-shaped structure, the outer surfaces of the first and second surfaces corresponding to the connection between the first adapter piece 4 and the body 1, as well as the outer surfaces of the second adapter piece 5 and the body 1 corresponding to the connection between the first and second surfaces, are all provided with an insulating layer.

[0076] In other embodiments, the first adapter piece 4, the body 1, and the second adapter piece 5 form an L-shaped structure.

[0077] When the first adapter piece 4, the main body 1, and the second adapter piece 5 form an L-shaped structure, an insulating layer can be provided only on the outer surfaces corresponding to the first and second surfaces at the connection between the first adapter piece 4 and the main body 1, while no insulating layer is provided on the outer surfaces corresponding to the first and second surfaces at the connection between the second adapter piece 5 and the main body 1; or conversely, that is, an insulating layer is provided only on the outer surfaces corresponding to the first and second surfaces at the connection between the second adapter piece 5 and the main body 1, while no insulating layer is provided on the outer surfaces corresponding to the first and second surfaces at the connection between the first adapter piece 4 and the main body 1; of course, an insulating layer can also be provided on both the outer surfaces corresponding to the first and second surfaces at the connection between the first adapter piece 4 and the main body 1, and the outer surfaces corresponding to the first and second surfaces at the connection between the second adapter piece 5 and the main body 1.

[0078] Please refer to Figure 8In addition to the aforementioned safety components, this utility model also provides a battery including the safety components disclosed in the above embodiments. The battery further includes a top sealing edge 8 and a first electrode tab (not shown in the figure). An adhesive 9 for the safety component is attached to the top sealing edge 8, and the safety component is electrically connected to the first electrode tab. The structure of other parts of the battery can be found in related technologies and will not be described in detail here. That is, the first insulating layer 3 of the safety component is connected to the top sealing edge 8 via the adhesive 9, so that the safety component corresponds to the position of the first electrode tab, thereby achieving electrical connection between the safety component and the first electrode tab.

[0079] For example, the first adapter 4 or the second adapter 5 of the safety component is connected to the first tab, and the battery also includes tabs without safety components, such as the second tab (not shown in the figure).

[0080] The key point of this embodiment is that the security component disclosed in any of the above embodiments has the same beneficial effects as the security components described above, and will not be repeated here.

[0081] Furthermore, to reduce the height of the top sealing edge 8, in some embodiments, along the first direction, the top edge of the top sealing edge 8 is lower than the lowest position of the top edge of the first insulating layer 3 of the safety component. For example... Figure 8 As shown, the Y-axis represents the first direction, which is the height direction of the battery. Figure 8 The Z-axis is perpendicular to both the X-axis and Y-axis. The height from the top edge of the top seal 8 to the lowest point of the top edge of the first insulating layer 3 is Y4, where Y4 ≥ 0. That is, by setting the first insulating layer 3, the top seal 8 can be made lower to improve the energy density performance of the battery. It should be noted that when the top edge of the first insulating layer 3 has a notch 31, the top edge of the top seal 8 is lower than the lowest point of the notch 31 to minimize the height of the top seal 8.

[0082] Furthermore, in some embodiments, along the first direction, the top edge of the top sealing edge 8 is lower than the top edge of the temperature sensing element 2. For example... Figure 8 As shown, the height from the top edge of the top seal 8 to the top edge of the temperature sensing element 2 is Y5, where Y5 ≥ 0. It can be understood that since the safety component prevents the temperature sensing element 2 from being exposed by providing the first insulating layer 3, there is no need to use the top seal 8 to shield the temperature sensing element 2 to avoid exposure. This allows the top edge of the top seal 8 to be lower than the top edge of the temperature sensing element 2, further reducing the height of the top seal 8 and improving the energy density performance of the battery.

[0083] Additionally, in some embodiments, along the first direction, the top edge of the adhesive 9 is lower than the top edge of the top sealing edge 8. For example... Figure 8As shown, the height from the top edge of the adhesive 9 to the top edge of the top seal 8 is Y3, where Y3 ≥ 0. This prevents the top edge of the adhesive 9 from extending beyond the top edge of the top seal 8, thus preventing the safety component from sticking to foreign objects or packaging trays and affecting battery access.

[0084] It should be noted that the specific structure of the adhesive component 9 is not limited in the embodiments of this utility model. In some embodiments, the adhesive layer includes double-sided adhesive to facilitate the connection between the safety component and the top sealing edge 8 and improve the reliability of the connection between the two.

[0085] It should also be noted that, in this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0086] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0087] The safety components and battery provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A security component, characterized in that, include: The body (1) includes a first surface and a second surface that are opposite to each other; Temperature sensing element (2) is disposed on the first surface; The first adapter piece (4) is connected to one side of the main body (1); A first insulating layer (3) is disposed on the side of the temperature sensing element (2) away from the first surface. The circumferential edge of the first insulating layer (3) is flush with or extends beyond the circumferential edge of the temperature sensing element (2), and the first insulating layer (3) covers at least part of the first adapter piece (4). An adhesive (9) is located on the side of the first insulating layer (3) away from the temperature sensing element (2).

2. The security component according to claim 1, characterized in that, The top edge of the first insulating layer (3) is provided with a notch (31); Along the first direction, the bottom edge of the notch (31) is not lower than the top edge of the temperature sensing element (2), wherein the first direction is the height direction.

3. The security component according to claim 1, characterized in that, The distance from the top edge of the first insulating layer (3) to the top edge of the temperature sensing element (2) is Y1, where 0 ≤ Y1 ≤ 3 mm.

4. The security component according to any one of claims 1-3, characterized in that, The other side of the main body (1) is connected to a second adapter piece (5), and the first insulating layer (3) covers at least part of the second adapter piece (5).

5. The security component according to claim 4, characterized in that, At least one of the following is provided with a second insulating layer (6): the outer side of the second surface corresponding to the connection between the first adapter piece (4) and the body (1), and the outer side of the second surface corresponding to the connection between the second adapter piece (5) and the body (1).

6. The security component according to claim 5, characterized in that, Also includes: The third insulating layer (7) is disposed on the second surface at the position corresponding to the temperature sensing element (2), and the second insulating layer (6) and the third insulating layer (7) are connected as one piece or as an integral structure.

7. The security component according to claim 6, characterized in that, The first insulating layer (3), the second insulating layer (6), and the third insulating layer (7) form a first integral insulating layer; The second insulating layer (6) and the third insulating layer (7) are located on the upper or lower side of the first insulating layer (3) along the first direction. The first integral insulating layer is bent from the bottom edge of the body (1) along the first direction and covers the body (1). Alternatively, the second insulating layer (6) and the third insulating layer (7) are located on one side of the first insulating layer (3) along the second direction. The portion of the first integral insulating layer corresponding to the second insulating layer (6) and the third insulating layer (7) is bent from the side edge of the body (1) along the second direction and covers the body (1). The first direction is the height direction, and the second direction is perpendicular to the first direction.

8. The security component according to claim 5, characterized in that, The first insulating layer (3) and the second insulating layer (6) form a second integral insulating layer; The second insulating layer (6) is located on the upper or lower side of the first insulating layer (3) along the first direction. The second integral insulating layer is bent from the bottom edge of the body (1) along the first direction and covers the body (1). Alternatively, the second insulating layer (6) is located on the side of the first insulating layer (3) along the second direction. The portion of the second integral insulating layer corresponding to the second insulating layer (6) is bent from the side edge of the body (1) along the second direction and covers the body (1). The first direction is the height direction, and the second direction is perpendicular to the first direction.

9. The security component according to claim 6, characterized in that, The first adapter piece (4), the main body (1), and the second adapter piece (5) form a U-shaped structure; and / or, The first adapter piece (4), the main body (1), and the second adapter piece (5) form an L-shaped structure.

10. A battery, characterized in that, Includes a top seal (8), a first tab, and a safety component as described in any one of claims 1-9, wherein the adhesive (9) is attached to the top seal (8), and the safety component is electrically connected to the first tab.

11. The battery according to claim 10, characterized in that, Along the first direction, the top edge of the top seal (8) is lower than the lowest position of the top edge of the first insulating layer (3) of the safety assembly; and / or, Along the first direction, the top edge of the top sealing edge (8) is lower than the top edge of the temperature sensing element (2); and / or, Along the first direction, the top edge of the adhesive (9) is lower than the top edge of the top seal (8); Wherein, the first direction is the height direction.

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