Electrochemical device and electric apparatus

Abstract

The utility model relates to electrochemical device and electric equipment, including electric core, the electric core includes top edge and the tab that stretches out from top edge outward, the tab is equipped with tab rubber at the junction of tab and top edge, the end surface of electric core is equipped with top edge is top surface, the tab is folded towards top edge at tab rubber, the tab is connected with protection board subassembly, protection board subassembly includes the circuit board and soft board that are connected, the circuit board is connected with tab, the circuit board forms the hollow let -pass channel, the soft board is equipped with the over -gluing groove that communicates with let -pass channel, top edge, tab, protection board subassembly at least partial coating has injection molding glue structure spare outside. The utility model discloses through the reasonable setting tab folding angle range, hollow let -pass channel and over -gluing groove structure of protection board subassembly and the coating design of injection molding glue to key components, effectively solved the space occupation problem of tab rubber in the packaging process.

Description

Technical Field

[0001] This utility model relates to the field of battery cell packaging, and more particularly to electrochemical devices and electrical equipment. Background Technology

[0002] The battery pack size cannot be reduced due to the limitations of the adhesive on the battery cell tabs. Currently, printed circuit board widths are increasingly narrow; a 90W board width is expected to be 3.7mm. Therefore, if traditional packaging is used, the adhesive on the battery cell tabs becomes a major factor affecting the height of the pack. If a folded sealing edge is used, and the protection board is placed vertically into the battery cell cup, the adhesive on the battery cell tabs is very likely to extend beyond the cell's thickness when the cell is less than 5mm thick, making packaging impossible. Therefore, batteries using this packaging process on the market are all larger than 5mm. If traditional packaging with injection molding is used, the top of the battery normally needs to be completely wrapped with injection molding compound; if the top is not wrapped, the injection molding compound cannot spread smoothly to the surface. Additionally, some components are relatively tall, such as fuel gauges and ICs, which further increases the packaging space. Utility Model Content

[0003] In order to solve the above-mentioned problems of the prior art, the present invention provides an electrochemical device and an electrical device.

[0004] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0005] An electrochemical device includes a battery cell; the battery cell includes a top sealing edge and an electrode tab extending outward from the top sealing edge; an electrode tab adhesive is provided at the connection between the electrode tab and the top sealing edge; the end face of the battery cell with the top sealing edge is the top surface; the electrode tab is folded towards the top sealing edge at the electrode tab adhesive; the angle between the side of the electrode tab away from the top sealing edge and the top surface is β, satisfying 60°≤β≤180°; the angle between the top sealing edge and the top surface is γ, satisfying 0°≤γ≤90°; the electrode tab is connected to a protection board assembly; the protection board assembly includes a circuit board and a flexible board connected together; the circuit board is connected to the electrode tab; a hollow clearance channel is formed on the circuit board; a glue groove communicating with the clearance channel is provided on the flexible board; at least a portion of the top sealing edge, electrode tab, and protection board assembly are covered with injection-molded structural components.

[0006] In one embodiment of the present invention, the circuit board includes a first circuit board and a second circuit board spaced apart; the spaced area between the first circuit board and the second circuit board and the flexible circuit board form a clearance channel; electrical components located within the clearance channel are connected to the flexible circuit board.

[0007] In one embodiment of this utility model, the length of the glue-coating groove is A, which satisfies 5mm≤A≤20mm; the height of the glue-coating groove is B, which satisfies 0.4mm≤B≤1mm; the length direction of the glue-coating groove is parallel to the length direction of the flexible board; and the height direction of the glue-coating groove is parallel to the height direction of the flexible board.

[0008] In one embodiment of this utility model, the included angle γ between the top sealing edge and the top surface is 90°; the included angle β between the side of the electrode tab away from the top sealing edge and the top surface is 90°; the top sealing edge is set on one side biased towards the thickness direction of the battery cell; a cup groove is formed between the top sealing edge and the top surface; the electrode tab is folded towards the inside of the cup groove at the electrode tab adhesive and the electrode tab is substantially parallel to the top sealing edge; the protective plate assembly is disposed in the cup groove and located on the side of the electrode tab away from the top sealing edge.

[0009] In one embodiment of this utility model, the included angle γ between the top sealing edge and the top surface is 0°; the included angle β between the side of the electrode tab away from the top sealing edge and the top surface is 180°; the top sealing edge is disposed on one side biased towards the thickness direction of the battery cell; a cup groove is formed between the top sealing edge and the top surface, the top sealing edge is folded toward the inside of the cup groove and the top sealing edge is substantially parallel to the top surface; the electrode tab is folded toward the outside of the cup groove at the electrode tab adhesive and the electrode tab is substantially parallel to the top sealing edge; the protective plate assembly is disposed outside the cup groove and located on the side of the electrode tab away from the top sealing edge.

[0010] In one embodiment of the present invention, the circuit board includes an exposed surface that is not covered by the injection molding structure; a surface on the circuit board that is opposite to the top surface and away from the top surface is the exposed surface; a pad is attached to the exposed surface; the side where the exposed surface is located forms an injection port connected to the clearance channel; the glue channel is located on the side of the flexible board away from the exposed surface.

[0011] In one embodiment of the present invention, the circuit board includes an exposed surface that does not cover the injection molding structure; the surface of the circuit board that is vertically disposed on the top surface and connected to the clearance channel is the exposed surface; a pad is attached to the exposed surface; the side where the exposed surface is located forms an injection port connected to the clearance channel; the glue channel is disposed on the side of the flexible board away from the exposed surface.

[0012] In one embodiment of this utility model, the distance between the bending point of the tab adhesive and the top sealing edge is C, which satisfies 0 < C ≤ 1 mm.

[0013] In one embodiment of this utility model, the electrical component is a fuel meter or an IC.

[0014] An electrical device comprising the aforementioned electrochemical apparatus.

[0015] The beneficial effects of this utility model are: by reasonably setting the range of electrode folding angle, the hollow clearance channel and glue groove structure of the protective plate assembly, and the encapsulation design of the injection molding glue on key components, the space occupation problem of electrode glue in the encapsulation process is effectively solved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is an exploded view of the structure of this utility model;

[0018] Figure 2 This is a perspective view of the protective plate assembly of this utility model;

[0019] Figure 3 This is a partially enlarged schematic diagram of the end portion where the top surface of the battery cell of this utility model is located;

[0020] Figure 4 This is a schematic diagram of the packaging process according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the packaging process of another embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100. Battery cell; 101. Top surface; 102. Cup groove; 110. Top sealing edge; 120. Electrode tab; 121. Electrode tab adhesive; 130. Protection board assembly; 131. Circuit board; 1311. First circuit board; 1312. Second circuit board; 1313. External exposed surface; 132. Flexible board; 1321. Adhesive channel; 133. Clearance channel; 134. Electrical component; 140. Injection molded structural component; 150. Gasket. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Examples, such as Figure 1-5 As shown:

[0028] The height of cell 100 is parallel to the Z-axis, the thickness of cell 100 is parallel to the Y-axis, and the width of cell 100 is parallel to the X-axis.

[0029] This application proposes an electrochemical device, such as Figure 1As shown, the battery cell 100 includes a top sealing edge 110 and a tab 120 extending outward from the top sealing edge 110. A tab adhesive 121 is provided at the connection between the tab 120 and the top sealing edge 110. The end face of the battery cell 100 with the top sealing edge 110 is the top surface 101. The tab 120 is folded towards the top sealing edge 110 at the tab adhesive 121. The angle between the side of the tab 120 away from the top sealing edge 110 and the top surface 101 is β, satisfying 60°≤β≤180°. The top sealing edge 110 and the top surface 101... The included angle between surfaces 101 is γ, satisfying 0°≤γ≤90°; the tab 120 is connected to the protective plate assembly 130; the protective plate assembly 130 includes a circuit board 131 and a flexible board 132 connected to each other; the circuit board 131 is connected to the tab 120; a hollow clearance channel 133 is formed on the circuit board 131; the flexible board 132 is provided with a glue groove 1321 that communicates with the clearance channel 133; at least part of the top sealing edge 110, the tab 120, and the protective plate assembly 130 are covered by an injection-molded structural component 140.

[0030] The folding of the tab 120 towards the top sealing edge 110 at the tab adhesive 121 refers to the process of bringing the tab 120 towards the top sealing edge 110 with the tab adhesive 121 as the bending point. Specifically, this can be achieved by hot bending or mechanical bending, such as applying pressure to the tab adhesive 121 using a heating device for bending, or using a mold for cold pressing, with hot bending being preferred. Furthermore, the hollowed-out clearance channel 133 formed on the circuit board 131 refers to providing an opening area on the circuit board 131 to accommodate taller devices and to form a glue injection channel in conjunction with a glue injection mold. This is mainly to provide space to accommodate highly sensitive devices such as fuel gauges or ICs, preventing device height from affecting package size. In addition, the glue channel 1321 on the flexible board 132, which communicates with the clearance channel 133, refers to opening a channel on the flexible board 132 to allow injection molding compound to flow into the clearance channel 133 and diffuse through the glue channel 1321. The adhesive groove 1321 can be formed on the flexible board 132 by die-cutting or laser engraving, for example, by cutting out the groove with a die or creating a connecting path by laser ablation.

[0031] The battery cell 100 consists of a top sealing edge 110 and a tab 120 extending from the top sealing edge 110. A tab adhesive 121 is provided at the connection area between the tab 120 and the top sealing edge 110. This tab adhesive 121 serves as an insulating protective layer, and its bending point is precisely controlled to avoid exceeding the thickness boundary in the thin battery cell 100 or to effectively control the dimensions in the height direction. The tab 120 is folded towards the top sealing edge 110 at the tab adhesive 121. This folding operation is typically achieved through a heat-sealing process, thereby eliminating the risk of the tab adhesive 121 protruding in the height or thickness direction of the battery cell 100. The angle β between the side of the tab 120 away from the top sealing edge 110 and the top surface 101 is limited to a range of 60° to 180°. This angle range ensures that the folded tab 120 maintains structural stability, preventing excessive tilting that could lead to connection failure, while maintaining reliable electrical contact with the protection board assembly 130. Meanwhile, the included angle γ between the top sealing edge 110 and the top surface 101 is controlled between 0° and 90°. This angle design flexibly forms a cup-groove structure, providing a space for the protection board assembly 130 to accommodate cells 100 of different thicknesses. The protection board assembly 130 is composed of a circuit board 131 and a flexible circuit board 132 connected together. The circuit board 131 is directly connected to the tab 120 to establish an electrical path. The hollow clearance channel 133 formed on it is dedicated to accommodating highly sensitive electrical components 134, such as fuel gauges or ICs, to avoid the negative impact of component height on the overall package size. The glue channel 1321 provided on the flexible circuit board 132 is connected to the clearance channel 133. The glue channel 1321 serves as a directional flow channel for injection molding, guiding the injection molding to diffuse evenly into the interior after injection from the outside, thereby achieving full penetration of injection molding under partial encapsulation conditions and eliminating the need to completely encapsulate the head in traditional processes, which would increase the size. Ultimately, the top seal 110, tabs 120, and protective plate assembly 130 are at least partially covered by the injection-molded structural component 140. This partial covering strategy provides mechanical protection and environmental sealing while minimizing the increase in thickness / height, synergistically optimizing the integration of narrow-width packages and highly sensitive devices.

[0032] like Figure 2 As shown, in one embodiment of the present invention, the circuit board 131 includes a first circuit board 1311 and a second circuit board 1312 spaced apart; the spaced area between the first circuit board 1311 and the second circuit board 1312 and the flexible board 132 form a clearance channel 133; an electrical component 134 located in the clearance channel 133 is connected to the flexible board 132.

[0033] The first circuit board 1311 and the second circuit board 1312, which are spaced apart, refer to the circuit board 131 being designed as two separate, independent parts. This can be achieved using a printed circuit board 131 segmentation process or a modular splicing structure. The purpose is to actively create an adjustable spacing space, providing a structural basis for forming the exposed surface 1313. The space between the first circuit board 1311 and the second circuit board 1312, together with the flexible board 132, forms a clearance channel 133. This means that this area, together with the flexible board 132, forms an open accommodating space. The purpose is to provide a flexible and adaptable channel structure, ensuring that there is no stress concentration due to size differences when tall components are embedded, and providing a channel for subsequent injection molding. In practical applications, the electrical component 134 located within the clearance channel 133 refers to the electrical component 134 being positioned in the inner area of ​​the channel. This can be achieved using surface mount technology or embedded packaging technology. For example, it can be an electronic component such as a resistor or capacitor. The purpose is to effectively accommodate the component height within the channel, avoiding protrusion from the surface of the protective board assembly 130.

[0034] like Figure 3 As shown, in one embodiment of this utility model, the length of the glue channel 1321 is A, which satisfies 5mm≤A≤20mm; the height of the glue channel 1321 is B, which satisfies 0.4mm≤B≤1mm; the length direction of the glue channel 1321 is parallel to the length direction of the flexible board 132; the height direction of the glue channel 1321 is parallel to the height direction of the flexible board 132.

[0035] The length of the glue channel 1321 refers to the dimension of the glue channel 1321 on the flexible board 132 along its extension direction. It can be implemented using a value within the range of 5mm to 20mm. The purpose is to ensure that the injection molding compound has sufficient flow path to achieve uniform coverage, while avoiding excessive length that encroaches on the limited thickness space of the battery cell 100. The height of the glue channel 1321 refers to the dimension of the glue channel 1321 on the flexible board 132 perpendicular to its length direction. It can be controlled within the range of 0.4mm to 1mm. The purpose is to prevent the injection molding compound from clogging the flow due to excessively small gaps, while also avoiding excessively large gaps that weaken the structural strength of the flexible board 132. The length direction of the 321 being parallel to the length direction of the flexible plate 132 means that the extension direction of the glue channel 1321 is consistent with the long side direction of the flexible plate 132. It can be achieved by adopting an orientation method that matches the layout of the flexible plate 132. The purpose is to allow the injection molding compound to flow smoothly along the natural direction of the flexible plate 132 and reduce flow resistance. The height direction of the glue channel 1321 being parallel to the height direction of the flexible plate 132 means that the depth direction of the glue channel 1321 is consistent with the thickness direction of the flexible plate 132. It can be set based on the geometric characteristics of the flexible plate 132. The purpose is to ensure that the injection molding compound filling process is coordinated with the height dimension of the flexible plate 132 and avoid uneven filling.

[0036] like Figure 4As shown, in one embodiment of this utility model, the included angle γ between the top sealing edge 110 and the top surface 101 is 90°; the included angle β between the side of the tab 120 away from the top sealing edge 110 and the top surface 101 is 90°; the top sealing edge 110 is set on one side biased towards the thickness direction of the cell 100; a cup groove 102 is formed between the top sealing edge 110 and the top surface 101; the tab 120 is folded towards the inside of the cup groove 102 at the tab adhesive 121 and the tab 120 is basically parallel to the top sealing edge 110; the protective plate assembly 130 is disposed in the cup groove 102 and located on the side of the tab 120 away from the top sealing edge 110.

[0037] In practical applications, the angle γ=90° between the top sealing edge 110 and the top surface 101 means that the top sealing edge 110 is perpendicular to the top surface 101. This is to form a stable right-angled cup groove 102 boundary, avoiding spatial deformation or boundary blurring caused by angle tilt. The angle β=90° between the side of the tab 120 furthest from the top sealing edge 110 and the top surface 101 can be understood as the tab 120 being perpendicular to the top surface 101 after folding. This can be achieved by controlling the bending point position of the tab adhesive 121. The purpose is to ensure that the tab 120 fits tightly against the top sealing edge 110, minimizing the occupation of the tab adhesive 121 in the height direction. The top sealing edge 110 is offset to one side of the cell 100 in the thickness direction, specifically, the top sealing edge 110 is offset to one side in the thickness direction of the cell 100. This can be achieved using an asymmetrical sealing process, with the aim of concentrating the cup groove 102 space in a specific area and optimizing the internal space allocation. A cup groove is formed between the top sealing edge 110 and the top surface 101. 102, in practical applications, refers to the recessed cavity formed at the junction of the top sealing edge 110 and the top surface 101. It can be directly formed through mold design, with the purpose of serving as an independent receiving area to absorb the installation requirements of the protective plate assembly 130. The tab 120 is folded towards the inside of the cup groove 102 at the tab adhesive 121, making the tab 120 basically parallel to the top sealing edge 110. Specifically, the tab 120 is bent inward at the tab adhesive 121 until it is parallel to the top sealing edge 110, which allows it to... The hot-pressing bending process is used to completely retract the tab adhesive 121 into the cup groove 102 to prevent it from exceeding the outline of the battery cell 100. The protection board assembly 130 is located in the cup groove 102 and on the side of the tab 120 away from the top sealing edge 110. This means that the protection board assembly 130 is completely embedded in the cup groove 102 and is located in the back area of ​​the tab 120. It can be installed using a positioning clamp. The purpose is to directly utilize the space of the cup groove 102 to accommodate the assembly and avoid additional thickness occupation.

[0038] like Figure 4As shown in Figure a, during the first folding, the tab adhesive 121 needs to be heat-bent to ensure that the tab 120 is basically parallel to the top surface 101, while the top sealing edge 110 is set perpendicular to the top surface 101 at this time. The position of the top sealing edge 110 is the initial position after the battery cell 100 is manufactured. By bending at the tab adhesive 121, the height dimension of the battery cell 100 after packaging can be effectively reduced, that is, the dimension in the Z-axis direction; furthermore, as Figure 4 As shown in b, the tab 120 is bent inwards towards the cup groove 102, that is, the tab 120 is bent counterclockwise so that the tab 120 is positioned close to the top sealing edge 110. Finally, the protective plate assembly 130 is welded to the tab 120 to form the structure shown in b. Figure 4 As shown in diagram c, after further low-pressure injection molding, the gasket 150 is glued to encapsulate the head of the complete cell 100; the welding of the protection board assembly 130 can also be performed in... Figure 4 After step a is completed, welding can be performed, or the appropriate welding time can be selected according to the actual process requirements. For example... Figure 4 As shown in Figure c, in this state, the dimension of the circuit board 131 in the z-axis direction slightly exceeds the dimension of the tab adhesive 121 at the bending point in the z-axis direction. At this time, the tab adhesive 121 will not affect the height dimension of the battery cell 100 during packaging. The final dimension is related to the width of the circuit board 131. Therefore, the height dimension of the battery cell 100 after packaging can be reduced by shortening the width of the circuit board 131. Furthermore, in this folding method, the dimension of the battery cell 100 in the thickness direction can be kept to a minimum, avoiding the wider circuit board 131 affecting the thickness dimension of the battery cell 100 package.

[0039] like Figure 5 As shown, in one embodiment of this utility model, the included angle γ between the top sealing edge 110 and the top surface 101 is 0°; the included angle β between the side of the tab 120 away from the top sealing edge 110 and the top surface 101 is 180°; the top sealing edge 110 is disposed on one side biased towards the thickness direction of the battery cell 100; a cup groove 102 is formed between the top sealing edge 110 and the top surface 101; the top sealing edge 110 is folded toward the inside of the cup groove 102 and is substantially parallel to the top surface 101; the tab 120 is folded toward the outside of the cup groove 102 at the tab adhesive 121 and is substantially parallel to the top sealing edge 110; the protective plate assembly 130 is disposed outside the cup groove 102 and located on the side of the tab 120 away from the top sealing edge 110.

[0040] Specifically, the angle γ=0° between the top sealing edge 110 and the top surface 101 means that the top sealing edge 110 and the top surface 101 are completely parallel, aiming to eliminate the extra height caused by the tilt of the sealing edge and provide a flat foundation for the miniaturization of the battery cell 100; the angle β=180° between the side of the tab 120 away from the top sealing edge 110 and the top surface 101 means that the tab 120 is completely parallel to the top surface 101 after folding, aiming to ensure that the area of ​​the tab adhesive 121 is strictly controlled within the thickness plane of the battery cell 100 to avoid the risk of protrusion; the top sealing edge 110 is set to one side of the thickness direction of the battery cell 100, meaning that the top sealing edge 110 is offset to one side of the battery cell 100 to form an asymmetrical layout, aiming to optimize the internal space allocation and avoid the ineffective space waste caused by the symmetrical layout; the cup groove 102 formed between the top sealing edge 110 and the top surface 101 means that the top sealing edge 110... The local recessed area formed at the junction with the top surface 101; the top sealing edge 110 is folded towards the inside of the cup groove 102 and the top sealing edge 110 is basically parallel to the top surface 101, which means that the top sealing edge 110 is folded towards the inside of the cup groove 102 until it is parallel to the top surface 101. The purpose is to maintain the flatness of the sealing edge and prevent the folding process from increasing the overall height; the tab 120 is folded towards the outside of the cup groove 102 at the tab adhesive 121 and the tab 120 is basically parallel to the top sealing edge 110, which means that the tab 120 is folded outward in the adhesive area and kept parallel to the top sealing edge 110; the protective plate assembly 130 is located outside the cup groove 102 and on the side of the tab 120 away from the top sealing edge 110, which means that the protective plate assembly 130 is installed in the outer area of ​​the cup groove 102. The purpose is to use the external space formed by the cup groove 102 to integrate taller electrical components 134 and ensure the feasibility of packaging.

[0041] like Figure 5 As shown in Figure a, this is a schematic diagram of the first folding in another embodiment. Compared to the previous folding method, in this embodiment, after the tab adhesive 121 is heat-bent, the tab 120 remains parallel to the top surface 101, but the folding direction of the tab 120 is clockwise; as shown in Figure a. Figure 5 As shown in b, the top sealing edge 110 is further folded counterclockwise so that it is basically flush with the top surface 101. Since the top sealing edge 110 cannot actually fit completely against the top surface 101 after folding, a certain gap exists to form the cup groove 102. The pressure during low-pressure injection molding can be used to make the top sealing edge 110 fit more tightly against the top surface 101. Figure 5 As shown in c, the tab 120 is further folded clockwise so that the tab 120 fits against the top sealing edge 110; as Figure 5As shown in Figure d, this is a schematic diagram of the structure after being finally connected to the protection board assembly 130. Under this packaging method, the dimension of the cell 100 in the height direction can be minimized, and the dimension in the thickness direction can also be effectively controlled due to the folding of the tab adhesive 121. It should be noted that in this folding method, the welding timing of the protection board assembly 130 and the tab 120 can be flexibly selected by those skilled in the art according to specific process requirements, and will not be described in detail here.

[0042] In one embodiment of the present invention, the circuit board 131 includes an exposed surface 1313 that does not cover the injection molding structure 140; the exposed surface 1313 is a surface on the circuit board 131 that is opposite to the top surface 101 and away from the top surface 101; a pad 150 is attached to the exposed surface 1313; the side where the exposed surface 1313 is located forms an injection port connected to the clearance channel 133; the glue channel 1321 is located on the side of the flexible board 132 away from the exposed surface 1313.

[0043] The exposed surface 1313 refers to the area on the circuit board 131 not covered by the injection molding structure 140. It can be the end face of the circuit board 131 in the height direction, specifically achieved by reserving an un-injected area. Its purpose is to provide a clear entry point for the injection molding process. The exposed surface 1313 can be understood as a specific surface on the circuit board 131 that is relative to and away from the top surface 101. Its purpose is to serve as a positioning reference for the injection port and facilitate docking with the injection equipment. Figure 4 As shown in Figure c, the outer surface 1313 is the end face on the right side of the circuit board 131. During low-pressure injection molding, the mold can abut against the outer surface 1313 so that the injection molded structural parts are not covered on the outer surface 1313, thereby ensuring that the height direction (Z-axis) dimension is minimized after injection molding. At the same time, the outer surface 1313 also provides an end face that mates with the injection mold, which facilitates assembly. The gasket 150 refers to the insulating material layer attached to the outer surface 1313. Its purpose is to achieve insulation of the outer surface 1313 and control the overall thickness. The injection port refers to the opening formed on the side where the outer surface 1313 is located, which communicates with the clearance channel 133. The glue channel 1321 is located on the side of the flexible board 132 away from the outer surface 1313. Specifically, it can be formed by stamping or etching processes. Its purpose is to promote the directional flow of injection molding glue to the far end of the cup groove 102.

[0044] In one embodiment of this utility model, the circuit board 131 includes an exposed surface 1313 that does not cover the injection-molded structural component 140; the exposed surface 1313 is the surface of the circuit board 131 that is perpendicular to the top surface 101 and connects with the clearance channel 133; as shown Figure 5As shown in d, the external exposed surface 1313 is any one of the two end faces of the circuit board 131 along the Y-axis direction. Preferably, the external exposed surface 1313 is selected to be the one located on the lower side. A pad 150 is attached to the external exposed surface 1313. The side where the external exposed surface 1313 is located forms a glue injection port connected to the clearance channel 133. The glue channel 1321 is set on the side of the flexible board 132 away from the external exposed surface 1313.

[0045] In one embodiment of this utility model, the distance between the bending point of the tab adhesive 121 and the top sealing edge 110 is C, which satisfies 0 < C ≤ 1 mm.

[0046] In practical applications, the distance C refers to the straight-line interval between the bending position of the tab adhesive 121 and the edge of the top sealing edge 110 during the folding process. The purpose is to avoid the risk of material stress concentration or connection failure caused by the overlap of the bending point and the top sealing edge 110, while ensuring that the extension range of the tab adhesive 121 after folding is strictly constrained within the thickness boundary of the cell 100.

[0047] Specifically, this technical solution limits the distance C to a range greater than 0 and not exceeding 1 mm, ensuring structural reliability during bending operations while effectively restricting the protruding length of the tab adhesive 121 in response to the trend of decreasing battery cell 100 package size. Since a distance C greater than 0 avoids stress concentration at the folding point, and a distance C not exceeding 1 mm constrains the extension range of the tab adhesive 121 within the allowable boundaries of the battery cell 100 package size, it prevents the tab adhesive 121 from exceeding the thickness surface of the battery cell 100 during the packaging process when the battery cell 100 thickness is less than 5 mm, thus ensuring the feasibility of the overall packaging process.

[0048] In one embodiment of this utility model, the electrical component 134 is a power meter or an IC.

[0049] Specifically, electrical component 134 refers to a key functional component used for monitoring and control in the battery management system. It can be a fuel gauge or an integrated circuit chip (IC). The fuel gauge can be a dedicated monitoring chip used to accurately measure the remaining battery power. The IC can be a standardized integrated circuit module including a microcontroller or signal processing unit. The purpose is to address the integration requirements of high-height components within the clearance channel 133 by limiting the component type to standardized components with relatively fixed size characteristics. This facilitates accurate positioning and structural adaptation within a limited space, thereby avoiding the problem of increased package thickness caused by abrupt changes in component height.

[0050] An electrical device comprising the aforementioned electrochemical apparatus.

[0051] The core innovation of this application lies in the effective control of the package size by combining the folding of the tab 120 toward the top sealing edge 110 at the tab adhesive 121 with the control of the angle between the top sealing edge 110 and the top surface 101. At the same time, by introducing the collaborative design of the clearance channel 133 and the glue channel 1321, a space is provided for taller devices and the injection molding glue is smoothly diffused and filled without completely covering the top, thereby significantly reducing the package space requirement, achieving a reduction in the thickness of the cell 100 and a more compact overall package.

[0052] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An electrochemical device, characterized in that: The battery includes a battery cell (100); the battery cell (100) includes a top sealing edge (110) and a tab (120) extending outward from the top sealing edge (110); a tab adhesive (121) is provided at the connection between the tab (120) and the top sealing edge (110); the end face of the battery cell (100) with the top sealing edge (110) is the top surface (101); the tab (120) is folded towards the top sealing edge (110) at the tab adhesive (121); the angle between the side of the tab (120) away from the top sealing edge (110) and the top surface (101) is β, satisfying 60°≤β≤180°; the top sealing edge (110) and the top sealing edge (110) are folded towards the top sealing edge (110); the top sealing edge (110) and the top surface (101) are folded towards the top sealing edge (110); the top sealing edge (110) and the top surface (101) are folded towards the top sealing edge (110); the top sealing edge (110) and the top surface (101) are folded towards the top sealing edge (110); the top surface (110) and the top sealing edge (110) are folded towards the top sealing edge (110); the top surface (110) and the top sealing edge (120) are folded towards the top sealing edge ... The included angle between the top surfaces (101) is γ, satisfying 0°≤γ≤90°; the tab (120) is connected to the protective plate assembly (130); the protective plate assembly (130) includes a circuit board (131) and a flexible board (132) connected to each other; the circuit board (131) is connected to the tab (120); a hollow clearance channel (133) is formed on the circuit board (131); the flexible board (132) is provided with a glue groove (1321) that communicates with the clearance channel (133); the top sealing edge (110), the tab (120), and the protective plate assembly (130) are at least partially covered by an injection-molded structural component (140).

2. The electrochemical device according to claim 1, characterized in that: The circuit board (131) includes a first circuit board (1311) and a second circuit board (1312) spaced apart; the spaced area between the first circuit board (1311) and the second circuit board (1312) forms a clearance channel (133) with the flexible board (132); the flexible board (132) is connected to an electrical component (134) located in the clearance channel (133).

3. The electrochemical device according to claim 1, characterized in that: The length of the glue-applying groove (1321) is A, which satisfies 5mm≤A≤20mm; the height of the glue-applying groove (1321) is B, which satisfies 0.4mm≤B≤1mm; the length direction of the glue-applying groove (1321) is parallel to the length direction of the flexible board (132); the height direction of the glue-applying groove (1321) is parallel to the height direction of the flexible board (132).

4. The electrochemical device according to claim 1, characterized in that: The angle γ between the top sealing edge (110) and the top surface (101) is 90°; the angle β between the side of the tab (120) away from the top sealing edge (110) and the top surface (101) is 90°; the top sealing edge (110) is set on one side biased towards the thickness direction of the cell (100); a cup groove (102) is formed between the top sealing edge (110) and the top surface (101); the tab (120) is folded towards the inside of the cup groove (102) at the tab adhesive (121) and the tab (120) is basically parallel to the top sealing edge (110); the protective plate assembly (130) is disposed in the cup groove (102) and located on the side of the tab (120) away from the top sealing edge (110).

5. The electrochemical device according to claim 1, characterized in that: The angle γ between the top sealing edge (110) and the top surface (101) is 0°; the angle β between the side of the tab (120) away from the top sealing edge (110) and the top surface (101) is 180°; the top sealing edge (110) is biased towards one side of the cell (100) in the thickness direction; a cup groove (102) is formed between the top sealing edge (110) and the top surface (101), and the top sealing edge (110) faces the cup groove (102). The inside of the 02) is folded so that the top sealing edge (110) is substantially parallel to the top surface (101); the tab (120) is folded towards the outside of the cup groove (102) at the tab adhesive (121) so that the tab (120) is substantially parallel to the top sealing edge (110); the protective plate assembly (130) is located outside the cup groove (102) and on the side of the tab (120) away from the top sealing edge (110).

6. The electrochemical device according to claim 4, characterized in that: The circuit board (131) includes an exposed surface (1313) that is not covered by the injection molding structure (140); the exposed surface (1313) is a surface on the circuit board (131) that is opposite to the top surface (101) and away from the top surface (101); a pad (150) is attached to the exposed surface (1313); the side where the exposed surface (1313) is located forms an injection port connected to the clearance channel (133); the glue channel (1321) is located on the side of the flexible board (132) away from the exposed surface (1313).

7. The electrochemical device according to claim 5, characterized in that: The circuit board (131) includes an exposed surface (1313) that does not cover the injection molding structure (140); the exposed surface (1313) is a surface that is provided on the vertical top surface (101) of the circuit board (131) and is connected to the clearance channel (133); a pad (150) is attached to the exposed surface (1313); the side where the exposed surface (1313) is located forms an injection port connected to the clearance channel (133); the glue channel (1321) is provided on the side of the flexible board (132) away from the exposed surface (1313).

8. The electrochemical device according to claim 1, characterized in that: The distance between the bending point of the tab adhesive (121) and the top sealing edge (110) is C, which satisfies 0 < C ≤ 1 mm.

9. The electrochemical device according to claim 2, characterized in that: The electrical component (134) is a power meter or an IC.

10. An electrical appliance, characterized in that, Includes the electrochemical device as described in any one of claims 1 to 9.

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