Battery cell and battery cell group

Abstract

The utility model discloses a battery monomer and a battery monomer group, and relates to the technical field of batteries, the battery monomer comprises a shell, an insulating film, an insulating patch and connecting glue; the shell comprises a shell main body and a cover plate, the shell main body is provided with an opening, and the cover plate covers the opening; at least part of the insulating film covers the cover plate; the insulating patch is arranged on the cover plate, and a glue pouring area is formed between the insulating patch and the cover plate and / or between the insulating patch and the insulating film; the connecting glue is poured into the glue pouring area, and the shape of a gap formed between the insulating patch and the cover plate is matched with the shape of the connecting glue poured into the glue pouring area. The battery monomer provided by the utility model can reduce the risk that condensed water is in contact with the shell.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery cell and a battery cell pack. Background Technology

[0002] In related technologies, the sidewalls of battery cells are mostly covered with insulating film, and the insulating film is folded out onto the top cover, on which a top cover patch is then attached. However, after the insulating film and the top cover patch are connected, there are gaps between the insulating film and the top cover patch, or between the top cover and the top cover patch of the casing. Under condensation conditions, moisture can still easily enter between the top cover patch and the casing through these gaps, which can easily lead to the risk of moisture being conducted to the outside through condensation. Utility Model Content

[0003] The main objective of this application is to provide a battery cell and a battery cell assembly that are designed to reduce the risk of condensate coming into contact with the casing.

[0004] To achieve the above objectives, the battery cell proposed in this application includes a casing, an insulating film, an insulating patch, and a connecting adhesive; the casing includes a casing body and a cover plate, the casing body having an opening, and the cover plate covering the opening; at least a portion of the insulating film covers the cover plate; the insulating patch is disposed on the cover plate, and a potting area is formed between the insulating patch and the cover plate and / or between the insulating patch and the insulating film; the connecting adhesive is poured into the potting area, and the shape of the gap formed between the insulating patch and the cover plate is adapted to the shape of the connecting adhesive poured into the potting area.

[0005] In one embodiment, the insulating patch has a plurality of corners, and at least one corner of the insulating patch forms the potting area between it and the cover plate; or, at least one corner of the insulating patch forms the potting area between it and the insulating film.

[0006] In one embodiment, the corner of the insulating patch is provided with a clearance hole, which communicates with the potting area.

[0007] In one embodiment, the clearance hole includes:

[0008] A first connecting segment extends along a first direction and connects the glue-filling area; and

[0009] The second connecting segment is connected to the first connecting segment and extends along a second direction, which is set at an angle to the first direction.

[0010] In one embodiment, the first connecting segment includes a first end near the edge of the insulating patch and a second end away from the edge of the insulating patch; the second connecting segment connects to the first end of the first connecting segment.

[0011] In one embodiment, the surface area of ​​the insulating patch on the side near the cover plate is smaller than the surface area of ​​the cover plate on the side near the insulating patch, and the potting area is formed between the edge of the insulating patch and the edge of the cover plate.

[0012] In one embodiment, the potting area is a closed ring and surrounds the outer periphery of the insulating patch.

[0013] In one embodiment, a portion of the insulating film covers the housing body, and another portion of the insulating film is folded onto the cover plate to form an overlapping area and a single-layer coverage area, wherein the potting area covers at least a portion of the overlapping area and at least a portion of the single-layer coverage area.

[0014] In one embodiment, the overlapping area includes at least two stacked insulating films, with the bonding adhesive filling the space between each pair of adjacent insulating films.

[0015] This application also proposes a battery cell pack, including the aforementioned battery cells.

[0016] The technical solution of this application, by covering the opening of the housing body with a cover plate, makes the entire housing a closed container, thereby providing good protection for the electrode assembly inside the housing. By covering at least a portion of the insulating film on the cover plate and placing the insulating patch on the cover plate, a good insulation effect can be achieved for the cover plate. By forming a potting area between the insulating patch and the cover plate and / or between the insulating patch and the insulating film, and by injecting the connecting adhesive into the potting area, the connecting adhesive automatically fills the gaps between the insulating patch and the cover plate and / or between the insulating patch and the insulating film during its flow, thereby reducing the risk of condensate entering through these gaps, and thus reducing the risk of condensate contacting the housing. By adapting the shape of the gap formed between the insulating patch and the cover plate to the shape of the connecting adhesive injected into the potting area, a better sealing effect can be achieved, further reducing the risk of condensate contacting the housing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a disassembled structural diagram of an embodiment of the battery cell provided in this application;

[0019] Figure 2 A schematic diagram of the structure of a battery cell provided in this application after the casing and insulating film are assembled;

[0020] Figure 3 A top view of an embodiment of a battery cell provided in this application;

[0021] Figure 4 This is a disassembled structural diagram of another embodiment of the battery cell provided in this application;

[0022] Figure 5 This is a top view of a battery cell provided in another embodiment of the present application after the bonding adhesive has been removed;

[0023] Figure 6 A top view of another embodiment of the battery cell provided in this application;

[0024] Figure 7 This is a schematic diagram of the structure of an embodiment of the battery cell pack provided in this application.

[0025] Explanation of icon numbers:

[0026] 100. Battery cell; 110. Housing; 111. Housing body; 112. Cover plate; 1121. Terminal post; 120. Insulating film; 121. Overlapping area; 122. Single-layer covering area; 130. Insulating patch; 131. Clearance hole; 1311. First connecting section; 1312. Second connecting section; 132. Through hole; 140. Connecting adhesive;

[0027] 200. Box body.

[0028] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0032] In related technologies, the sidewalls of battery cells are mostly covered with insulating film, and the insulating film is folded out onto the top cover, on which a top cover patch is then attached. However, after the insulating film and the top cover patch are connected, there are gaps between the insulating film and the top cover patch, or between the top cover and the top cover patch of the casing. Under condensation conditions, moisture can still easily enter between the top cover patch and the casing through these gaps, which can easily lead to the risk of moisture being conducted to the outside through condensation.

[0033] In order to reduce the risk of condensation coming into contact with the casing, this application proposes a battery cell.

[0034] Please refer to the reference. Figures 1 to 6 In one embodiment of this application, the battery cell 100 includes a housing 110, an insulating film 120, an insulating patch 130, and a connecting adhesive 140; the housing 110 includes a housing body 111 and a cover plate 112, the housing body 111 having an opening, and the cover plate 112 covering the opening; at least a portion of the insulating film 120 covers the cover plate 112; the insulating patch 130 is disposed on the cover plate 112, and a potting area is formed between the insulating patch 130 and the cover plate 112 and / or between the insulating patch 130 and the insulating film 120; the connecting adhesive 140 is poured into the potting area, and the shape of the gap formed between the insulating patch 130 and the cover plate 112 is adapted to the shape of the connecting adhesive 140 poured into the potting area.

[0035] The housing body 111 in the housing 110 can be a cuboid or a cylinder, etc. For example, when the housing 110 is a cylinder, it has a circular opening; when the housing 110 is a cuboid, it has a rectangular opening. In one example, the housing 110 has only one opening, for example, an opening at the top or bottom of the housing 110; or openings at both opposite ends of the housing 110. The cover plate 112 covers the opening, so that the housing 110 and the cover plate 112 together form a closed space, which facilitates the enclosure of the electrode assembly of the battery cell 100 within the closed space. Specifically, the electrode assembly may include a positive electrode, a negative electrode, and a separator for separating the positive and negative electrodes.

[0036] The insulating film 120 at least partially covers the cover plate 112, meaning that part of the insulating film 120 covers the cover plate 112 and the other part covers the outer surface of the housing body 111 to insulate the housing body 111, or the insulating film 120 only covers the cover plate 112. The insulating patch 130 is a sheet-like structure attached to the cover plate 112 to insulate the cover plate 112. When part of the insulating film 120 covers the housing body 111 and the other part is folded onto the cover plate 112, the risk of condensation entering at the connection between the housing body 111 and the cover plate 112 can be reduced.

[0037] An insulating patch 130 is disposed on the cover plate 112, thereby providing a certain degree of insulation to the cover plate 112. When the insulating patch 130 is disposed on the cover plate 112, it may or may not cover the insulating film 120. When the insulating patch 130 is disposed on the cover plate 112 and covers the insulating film 120, there may be a gap between the insulating patch 130 and the insulating film 120 it covers, and this gap can form a potting area. When the insulating patch 130 is disposed on the cover plate 112 and does not cover the insulating film 120, there may be a gap between the insulating patch 130 and the cover plate 112 of the housing 110, and this gap can also form a potting area. Specifically, when the insulating patch 130 has a notched corner structure, the notched corner area can form a potting area; or the surface area of ​​the insulating patch 130 near the cover plate 112 is smaller than the surface area of ​​the insulating patch 130 away from the cover plate 112, for example, the cross-sectional shape of the insulating patch 130 is an inverted trapezoidal structure, so that the side of the insulating patch 130 away from the cover plate 112 forms a potting area with the cover plate 112; or, the insulating patch 130 is provided with a through hole, which can expose the insulating film 120 or the cover plate 112, so that the through hole forms a potting area; or, the surface area of ​​the insulating patch 130 is smaller than the surface area of ​​the cover plate 112, so that the insulating patch 130 can easily form a potting area with the edge of the cover plate 112.

[0038] Traditionally, the insulating patch 130 is bonded to the cover plate 112 or the insulating film 120 using double-sided adhesive. This double-sided adhesive is non-flowing, making it difficult to fill the gap between the insulating patch 130 and the cover plate 112, or between the insulating patch 130 and the insulating film 120. However, in this application, a connecting adhesive 140 is poured into the potting area. This connecting adhesive 140 is a flowable or semi-flowable adhesive that can flow and automatically fill the gap between the insulating patch 130 and the cover plate 112, or between the insulating patch 130 and the insulating film 120, thereby improving the sealing effect. After a period of time, the connecting adhesive 140 can cure to form a stable shape, thus achieving a good sealing and waterproof effect.

[0039] The technical solution of this application, by covering the opening of the housing body 111 with the cover plate 112, makes the housing 110 an entirely closed container, thereby providing good protection for the electrode assembly inside the housing 110. By covering at least a portion of the insulating film 120 on the cover plate 112 and placing the insulating patch 130 on the cover plate 112, a good insulation effect can be achieved for the cover plate 112. By forming a potting area between the insulating patch 130 and the cover plate 112 and / or between the insulating patch 130 and the insulating film 120, and by pouring the connecting adhesive 140 into the potting area, the connecting adhesive 140 automatically fills the gaps between the insulating patch 130 and the cover plate 112 and / or between the insulating patch 130 and the insulating film 120 during its flow, thereby reducing the risk of condensate entering from these gaps and thus reducing the risk of condensate contacting the housing 110. By adapting the shape of the gap formed between the insulating patch 130 and the cover plate 112 to the shape of the bonding adhesive 140 injected into the potting area, a better sealing effect can be achieved, further reducing the risk of condensate coming into contact with the housing 110.

[0040] In some embodiments of this application, a portion of the insulating film 120 covers the housing body 111, and another portion of the insulating film 120 is folded onto the cover plate 112 to form an overlapping area 121 and a single-layer covering area 122. The potting area covers at least a portion of the overlapping area 121 and at least a portion of the single-layer covering area 122.

[0041] It is understandable that when the same insulating film 120 covers both the housing body 111 and the cover plate 112, the folded-over area on the cover plate 112 will include the area covered by a single layer of insulating film 120, i.e., the single-layer coverage area 122, and the area where at least two layers of insulating film 120 are stacked on the top cover, i.e., the overlapping area 121. For example, taking the housing 110 as a cuboid housing 110, the overlapping area 121 of the insulating film 120 is usually located at the corner of the cover plate 112. A stepped transition structure will be formed at the junction of the overlapping area 121 and the single-layer coverage area 122. When the insulating patch 130 is attached to the insulating film 120, it can adhere relatively tightly to the single-layer cover area 122. However, the insulating patch 130 cannot adhere firmly to the transition structure formed at the junction of the overlapping area 121 and the single-layer cover area 122, thus creating a gap between the insulating patch 130 and the transition structure. In this application, by covering the overlapping area 121 and the single-layer cover area 122 with the potting area, the adhesive 140 can fill the gaps between the overlapping area 121 and the insulating patch 130, as well as the gaps between the single-layer cover area 122 and the insulating patch 130, thereby reducing the risk of condensate entering through these gaps and causing the housing 110 to communicate with the outside through condensate.

[0042] Specifically, when connecting the overlapping area 121 and the single-layer cover area 122 with the adhesive 140, it can be filled from the side of the insulating patch 130, and from the gap formed between the overlapping area 121 and the insulating patch 130 and / or the gap between the single-layer cover area 122 and the insulating patch 130. Alternatively, to facilitate user operation, the projection of the insulating patch 130 on the cover plate 112 can avoid at least part of the boundary between the overlapping area 121 and the single-layer cover area 122. For example, a through hole can be provided on the insulating patch 130 at the boundary between the overlapping area 121 and the single-layer cover area 122 to expose the boundary between the overlapping area 121 and the single-layer cover area 122, and then the adhesive 140 can be filled into the through hole. Alternatively, the size of the insulating patch 130 can be made smaller to expose the insulating film 120. Then, the periphery of the insulating patch 130 is filled with adhesive 140, so that the adhesive 140 can cover the junction of the overlapping area 121 and the single-layer covering area 122, and the adhesive 140 is connected to the insulating patch 130. In this way, the adhesive 140 fills the gap between the insulating patch 130 and the overlapping area 121 and the gap between the insulating patch 130 and the single-layer covering area 122, thereby achieving a good sealing effect and reducing the risk of condensate coming into contact with the housing 110.

[0043] In some embodiments of this application, the overlapping area 121 includes at least two stacked insulating films 120, with adhesive 140 filling the space between each pair of adjacent insulating films 120.

[0044] By filling the space between two adjacent insulating films 120 with adhesive 140, the sealing and waterproof performance between the two adjacent insulating films 120 can be enhanced, thereby reducing the risk of condensate entering from the gap between the two adjacent insulating films 120 in the overlapping area 121 and causing the housing 110 to come into contact with condensate.

[0045] Specifically, the overlapping area 121 in this example may include two, three, four, or more layers of insulating film 120. Taking the shell 110 as a cuboid and the insulating film 120 as a single sheet, folded from the shell body 111 towards the cover plate 112 as an example, when the insulating film 120 has a cut between the two parts of the two adjacent edges of the cover plate 112, the overlapping area 121 has two layers of insulating film 120. When the insulating film 120 does not have a cut between the two parts of the two adjacent edges of the cover plate 112, the overlapping area 121 has three layers of insulating film 120. It is understood that at least two adjacent insulating films 120 are not bonded together with adhesive, so gaps may easily appear between these two insulating films 120. This application fills the space between two adjacent insulating films 120 with adhesive 140, thereby sealing and filling the space between each pair of insulating films 120 with adhesive 140, which reduces the risk of condensate entering through the gap between the two adjacent insulating films 120 in the overlapping area 121 and coming into contact with the housing 110.

[0046] Please refer to the reference. Figures 1 to 3 In one embodiment of this application, the insulating patch 130 has a plurality of corners, and an adhesive potting area is formed between at least one corner of the insulating patch 130 and the cover plate 112; or, an adhesive potting area is formed between at least one corner of the insulating patch 130 and the insulating film 120.

[0047] Specifically, the corner of the insulating patch 130 has a notch, and the edge of the notch forms a potting area between the cover plate 112 or the insulating film 120. Alternatively, the corner of the insulating patch 130 near the cover plate 112 has a groove, and the groove forms a potting area.

[0048] This design facilitates user operation and prevents condensation from coming into contact with the housing 110 from the corners of the insulating patch 130.

[0049] Please refer to the reference. Figures 1 to 3 In one embodiment of this application, the corner of the insulating patch 130 is provided with a clearance hole 131, which is connected to the potting area.

[0050] Specifically, the clearance hole 131 can be elongated, L-shaped, circular, rectangular, or other shapes. The periphery of the clearance hole 131 can be closed, meaning the clearance hole 131 does not extend to the edge of the insulating patch 130. Alternatively, the clearance hole 131 can extend at least partially to the edge of the insulating patch 130. The clearance hole 131 can expose part of the insulating film 120, so that when the adhesive 140 is poured into the potting area through the clearance hole 131, the adhesive 140 can effectively connect the insulating patch 130 and the insulating film 120, thereby reducing the risk of condensate flowing in through the gap between the insulating patch 130 and the insulating film 120 and contacting the housing 110. Alternatively, the clearance hole 131 can expose part of the cover plate 112 of the housing 110, so that when the adhesive 140 is poured into the potting area through the clearance hole 131, the adhesive 140 can achieve the effect of connecting the insulating patch 130 to the cover plate 112, thereby reducing the risk of condensate flowing in through the gap between the insulating patch 130 and the cover plate 112 and contacting the housing 110.

[0051] The insulating patch 130 may have multiple corners, and each corner may have a clearance hole 131. For example, when the insulating patch 130 is rectangular, the clearance holes 131 provided at two adjacent corners may be symmetrically arranged. That is, along the first direction, i.e. the length direction of the cover plate 112, the two clearance holes 131 are symmetrically arranged about the center line of the cover plate 112 perpendicular to the length direction. Along the second direction, i.e. the width direction of the cover plate 112, the two clearance holes 131 are symmetrically arranged about the center line of the cover plate 112 perpendicular to the width direction.

[0052] By providing a clearance hole 131 at the corner of the insulating patch 130, and by having the clearance hole 131 connect to the potting area, it is convenient for the user to pour the bonding adhesive 140 into the potting area through the clearance hole 131, thereby improving the convenience of the user's potting.

[0053] Please refer to the reference. Figures 1 to 3 In one embodiment of this application, the clearance hole 131 includes a first connecting segment 1311 and a second connecting segment 1312. The first connecting segment 1311 extends along a first direction and connects to the glue-filling area. The second connecting segment 1312 connects to the first connecting segment 1311 and extends along a second direction, which is set at an angle to the first direction.

[0054] The first connected segment 1311 can be a straight line segment or a wavy line segment, etc. The second connected segment 1312 can be a straight line segment or a wavy line segment, etc. The first connected segment 1311 and the second connected segment 1312 can together form an L-shape, a T-shape, or a cross shape, etc.

[0055] By connecting the first connecting segment 1311 to the potting area, when the adhesive 140 passes through the first connecting segment 1311, the potting area can be filled, thereby reducing the risk of condensate entering from the potting area and coming into contact with the housing 110. By connecting the second connecting segment 1312 to the first connecting segment 1311, when the adhesive 140 passes through the second connecting segment 1312, the adhesive 140 will also flow to the first connecting segment 1311 and then to the potting area, thus facilitating the potting operation and reducing the risk of condensate flowing from the potting area to the housing 110. By setting the extension direction of the first connecting segment 1311 at an angle to the extension direction of the second connecting segment 1312, and ensuring that the first connecting segment 1311 and the second connecting segment 1312 are interconnected, the connecting adhesive 140 can automatically flow into the first connecting segment 1311, the second connecting segment 1312, and the dispensing area during the process of applying adhesive to the first connecting segment 1311, thereby reducing the risk of condensate coming into contact with the housing 110. Furthermore, this arrangement increases the connection area of ​​the connecting adhesive 140, improving its stability.

[0056] Furthermore, please refer to the following: Figures 1 to 3 In one embodiment of this application, the first connecting segment 1311 includes a first end near the edge of the insulating patch 130 and a second end away from the edge of the insulating patch 130; the second connecting segment 1312 connects to the first end of the first connecting segment 1311.

[0057] Specifically, the first connected segment 1311 and the second connected segment 1312 can together form an L-shape or a T-shape.

[0058] This configuration brings the second connecting section 1312 closer to the edge of the insulating patch 130. After the adhesive 140 is injected through the second connecting section 1312, it can block the condensate as close as possible to the edge of the insulating patch 130, thereby further reducing the risk of condensate contacting the housing 110.

[0059] Please refer to the reference. Figures 4 to 6 In another embodiment of this application, the surface area of ​​the insulating patch 130 near the cover plate 112 is smaller than the surface area of ​​the cover plate 112 near the insulating patch 130, and an adhesive potting area is formed between the edge of the insulating patch 130 and the edge of the cover plate 112.

[0060] Specifically, the surface area of ​​the insulating patch 130 on the side closest to the cover plate 112 is smaller than the surface area of ​​the cover plate 112 on the side closest to the insulating patch 130, while the surface area of ​​the insulating patch 130 on the side furthest from the cover plate 112 is greater than or equal to the surface area of ​​the cover plate 112 on the side closest to the insulating patch 130. Alternatively, both the surface area of ​​the insulating patch 130 on the side closest to the cover plate 112 and the surface area of ​​the insulating patch 130 on the side furthest from the cover plate 112 are smaller than the surface area of ​​the cover plate 112 on the side closest to the insulating patch 130.

[0061] By setting the surface area of ​​the insulating patch 130 near the cover plate 112 to be smaller than the surface area of ​​the cover plate 112 near the insulating patch 130, the size of the insulating patch 130 is reduced, thereby lowering the material cost of the insulating patch 130. Additionally, it is understood that this arrangement causes at least a portion of the edge of the insulating patch 130 near the cover plate 112 to be misaligned with the edge of the cover plate 112, making it easier for condensate to enter and contact the cover plate 112 at at least a portion of the edge of the insulating patch 130 near the cover plate 112. By forming a potting area between the edge of the insulating patch 130 and the edge of the cover plate 112, the adhesive 140 poured into the potting area can adhere to the edge of the insulating patch 130, providing a good seal and reducing the risk of condensate entering the gap between the insulating patch 130 and the insulating film 120 or the gap between the insulating patch 130 and the cover plate 112. In addition, this design can reduce the process of opening clearance holes 131 on the insulating patch 130, thereby improving the processing efficiency of the insulating patch 130.

[0062] Please refer to the reference. Figures 4 to 6 Furthermore, the potting area is a closed ring and surrounds the outer periphery of the insulating patch 130.

[0063] By arranging the potting area in a closed ring shape, the connecting adhesive 140 poured into the potting area is also arranged in a closed ring shape. The connecting adhesive 140 is arranged around the outer periphery of the insulating patch 130, which allows the connecting adhesive 140 to completely fill the gap between the insulating patch 130 and the insulating film 120 or the gap between the edge of the insulating patch 130 and the cover plate 112, thereby further reducing the risk of condensate coming into contact with the housing 110.

[0064] Please refer to the reference. Figures 1 to 6 In some embodiments of this application, the cover plate 112 is provided with a pole post 1121, and the insulating patch 130 is provided with a through hole 132, through which the pole post 1121 passes.

[0065] This configuration allows the battery cell 100 to be connected to external electrical devices via the terminal post 1121, thereby enabling it to supply power to the external electrical devices through electrical connection.

[0066] This application also proposes a battery cell pack, such as Figure 7 As shown, the battery cell pack includes a battery cell 100. The specific structure of the battery cell 100 is as described in the above embodiments. Since this battery cell pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0067] like Figure 3 As shown, the battery cell pack also includes a housing 200, within which a plurality of battery cells 100 are disposed. The housing 200 provides a receiving space for the battery cells 100, and the housing 200 can adopt various structures. In some embodiments, the housing 200 may include a first part and a second part, which overlap each other, and the first part and the second part together define a receiving space for receiving the battery cells 100. The second part may be a hollow structure with one end open, and the first part may be a plate-like structure, with the first part covering the open side of the second part so that the first part and the second part together define the receiving space; the first part and the second part may also be hollow structures with one side open, with the open side of the first part covering the open side of the second part. Of course, the housing 200 can be of various shapes, such as a cylinder, a cuboid, etc.

[0068] When there are multiple battery cells 100, the multiple battery cells 100 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 100 are connected in both series and parallel. The multiple battery cells 100 can be directly connected in series, in parallel, or in a mixed connection, and then the whole composed of these multiple battery cells 100, that is, the battery module, is housed in the housing 200.

[0069] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery cell, characterized in that, include: A housing, the housing comprising a housing body and a cover plate, the housing body having an opening, the cover plate covering the opening; An insulating film, at least a portion of which covers the cover plate; An insulating patch, wherein the insulating patch is disposed on the cover plate, and an adhesive potting area is formed between the insulating patch and the cover plate and / or between the insulating patch and the insulating film; and A connecting adhesive is poured into the potting area, and the shape of the gap formed between the insulating patch and the cover plate is adapted to the shape of the connecting adhesive poured into the potting area.

2. The battery cell as described in claim 1, characterized in that, The insulating patch has multiple corners, and at least one corner of the insulating patch forms the potting area between it and the cover plate; or, at least one corner of the insulating patch forms the potting area between it and the insulating film.

3. The battery cell as described in claim 2, characterized in that, The insulating patch has a clearance hole at its corner, and the clearance hole connects to the potting area.

4. The battery cell as described in claim 3, characterized in that, The clearance hole includes: A first connecting segment extends along a first direction and connects the glue-filling area; and The second connecting segment is connected to the first connecting segment and extends along a second direction, which is set at an angle to the first direction.

5. The battery cell as described in claim 4, characterized in that, The first connecting segment includes a first end near the edge of the insulating patch and a second end away from the edge of the insulating patch; the second connecting segment connects to the first end of the first connecting segment.

6. The battery cell as described in claim 1, characterized in that, The surface area of ​​the insulating patch on the side closest to the cover plate is smaller than the surface area of ​​the cover plate on the side closest to the insulating patch, and the potting area is formed between the edge of the insulating patch and the edge of the cover plate.

7. The battery cell as described in claim 6, characterized in that, The potting area is a closed ring and surrounds the outer periphery of the insulating patch.

8. The battery cell according to any one of claims 1 to 7, characterized in that, A portion of the insulating film covers the housing body, and another portion of the insulating film is folded onto the cover plate to form an overlapping area and a single-layer coverage area. The potting area covers at least a portion of the overlapping area and at least a portion of the single-layer coverage area.

9. The battery cell as described in claim 8, characterized in that, The overlapping area includes at least two stacked insulating films, with the bonding adhesive filling the space between each pair of adjacent insulating films.

10. A battery cell pack, characterized in that, Includes the battery cell as described in any one of claims 1 to 9.

Images