Battery and battery module

Abstract

The utility model provides a battery and a battery module, the battery comprises: a battery cell having a top surface and a bottom surface opposite to each other, the top surface being provided with at least one pole; the insulating sheet is arranged on one side, far away from the bottom surface, of the top surface, the insulating sheet is provided with a connecting area, the connecting area is exposed out of the top surface, and the pressing strip is connected with the battery cell through the connecting area. According to the battery and the battery module disclosed by the utility model, the expansion force of the battery cell can be more effectively inhibited, the shearing force borne by glue at the bottom of the battery cell is reduced, and the displacement of the battery module in the horizontal direction and the vertical direction is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery and a battery module. Background Art

[0002] During the manufacturing process of battery modules, it is often necessary to add a beading structure to suppress the expansion force of the battery cell and reduce the shear force on the glue at the bottom of the battery cell to improve the horizontal and vertical displacement of the battery module. When the beading is directly connected to the top insulating sheet of the battery cell, the connection between the beading and the battery cell is: beading - structural adhesive - top insulating sheet - top insulating sheet glue - top cover. However, the top insulating sheet and other film layers between the beading and the battery cell are prone to bulging or detaching from the battery cell during battery cell expansion, affecting the force of the beading on the battery cell and causing the beading to lose its ability to suppress the battery cell's expansion force. Utility Model Content

[0003] The utility model provides a battery and a battery module, which can more effectively suppress the expansion force of the battery core and reduce the shear force exerted on the glue at the bottom of the battery core, thereby improving the displacement of the battery module in the horizontal and vertical directions.

[0004] The utility model provides a battery, comprising:

[0005] A battery cell having a top surface and a bottom surface opposite to each other, wherein the top surface is provided with at least one pole;

[0006] An insulating sheet is provided on a side of the top surface away from the bottom surface, the insulating sheet is provided with a connection area, the connection area exposes the top surface, and the pressure strip is connected to the battery core through the connection area.

[0007] In some embodiments, the insulating sheet has two opposite ends in a first direction, and the connection area is located at at least one end of the insulating sheet in the first direction and / or between the opposite ends of the insulating sheet in the first direction, and the first direction is the extension direction of the insulating sheet.

[0008] In some embodiments, when the connection region is located at at least one end of the insulating sheet in the first direction, the connection region is a notch provided at the end of the insulating sheet.

[0009] In some embodiments, when the connection region is located between opposite ends of the insulating sheet in the first direction, the connection region is a through hole provided on the insulating sheet, and the through hole passes through the insulating sheet in a direction perpendicular to the top surface.

[0010] In some embodiments, when the connection area is located between the opposite ends of the insulating sheet in the first direction, the connection area extends along the second direction and separates the insulating sheet into a plurality of sub-insulating sheets arranged at intervals along the first direction, and the second direction is perpendicular to the first direction.

[0011] In some embodiments, the top surface is provided with a first pole and a second pole, and an explosion-proof valve located between the first pole and the second pole, and the insulating sheet is provided with a first pole hole corresponding to the first pole, a second pole hole corresponding to the second pole, and an explosion-proof valve hole corresponding to the explosion-proof valve;

[0012] When the connection area is located between opposite ends of the insulating sheet in the first direction, the connection area is located between the first pole hole and the explosion-proof valve hole and / or between the second pole hole and the explosion-proof valve hole.

[0013] In some embodiments, the length of the battery core in the first direction is L, the length of the connection area in the first direction is M, and (L / 30-5) mm≤M≤(L / 30+5) mm.

[0014] In some embodiments, a detection hole is further provided on the insulating sheet, and the connection area does not overlap with the detection hole.

[0015] The present invention also provides a battery module, comprising:

[0016] A battery pack, comprising at least one sub-battery pack, wherein the sub-battery pack comprises a plurality of batteries as described above, and the plurality of batteries are arranged along the second direction;

[0017] at least one holding strip extending along the second direction and connected to the sub-battery pack;

[0018] The pressure strip is arranged on a side of the top surface away from the bottom surface, and is connected to the battery core through the connection area.

[0019] In some embodiments, the sub-battery group has two opposite ends in a first direction, the pressure strip is located at least one end of the sub-battery group in the first direction and / or between the two opposite ends of the sub-battery group in the first direction, and the first direction is perpendicular to the second direction.

[0020] In some embodiments, the battery pack includes a plurality of sub-battery packs, and the plurality of sub-battery packs are arranged along the first direction;

[0021] The battery module includes a first pressure strip and a second pressure strip, the first pressure strip is located between the opposite ends of the sub-battery group in the first direction or at least one end of the battery group in the first direction, and the second pressure strip is located between two adjacent sub-battery groups and connected to the two adjacent sub-battery groups.

[0022] In some embodiments, the length of the second layer in the first direction is twice the length of the first layer in the first direction.

[0023] In some embodiments, the pressure strip is connected to the battery cell by bonding.

[0024] The present invention provides a battery and a battery module, wherein the top surface of the battery is provided with an insulating sheet, the insulating sheet is provided with a connection area, the connection area exposes the top surface of the battery cell, and the bead is connected to the top surface of the battery cell through the connection area. In the present application, since the insulating sheet is provided with a connection area to avoid the bead, the bead is directly connected and fixed to the battery cell through the connection area. During the expansion of the battery cell, the bead is always pressed against the top surface of the battery cell, and problems such as the bead detaching from or shifting the battery cell will not occur. Therefore, in the present application, the bead can more effectively suppress the expansion force of the battery cell and reduce the shear force on the glue at the bottom of the battery cell, thereby improving the displacement of the battery module in the horizontal and vertical directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of an exploded structure of a battery provided by an embodiment of the present utility model;

[0027] Figure 2 This is a schematic structural diagram of a battery provided by an embodiment of the present utility model;

[0028] Figure 3 is a top view of one of the batteries provided in an embodiment of the present utility model;

[0029] Figure 4 is a top view of one of the batteries provided in an embodiment of the present utility model;

[0030] Figure 5 is a top view of one of the batteries provided in an embodiment of the present utility model;

[0031] Figure 6is a top view of one of the batteries provided in an embodiment of the present utility model;

[0032] Figure 7 is a top view of one of the batteries provided in an embodiment of the present utility model;

[0033] Figure 8 This is a top view of a battery module provided by an embodiment of the present utility model;

[0034] Figure 9 This is a top view of a battery module provided by an embodiment of the present utility model;

[0035] Figure 10 It is a top view of one of the battery modules provided in an embodiment of the present utility model.

[0036] Figure 11 This is a top view of a battery module provided by an embodiment of the present utility model;

[0037] Figure 12 This is a top view of a battery module provided by an embodiment of the present utility model;

[0038] Figure 13 It is a top view of one of the battery modules provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0040] See also Figure 1-Figure 2, is a battery 100 provided in the present application, comprising a battery cell 110 and an insulating sheet 120. The battery cell 110 has a top surface 1101 and a bottom surface 1102 opposite each other, and the top surface 1101 is provided with at least one terminal 111. The insulating sheet 120 is provided on a side of the top surface 1101 away from the bottom surface 1102, and is provided with a connection area 121. The connection area 121 exposes the top surface 1101, and the pressure strip 20 is connected to the battery cell 110 through the connection area 121.

[0041] In a traditional battery module, the pressure strip 20 is usually directly arranged on the insulating sheet 120, and is not directly connected to the battery cell 110. During the expansion of the battery cell 110, the change in the volume of the battery cell 110 will cause the insulating sheet 120 to deform, such as bulging. At this time, the insulating sheet 120 and the battery cell 110 are easily separated, and the pressure strip 20 connected to the surface of the insulating sheet 120 cannot be tightly pressed onto the battery cell 110, affecting the fixing effect of the pressure strip 20 on the battery cell 110. After the battery cell 110 loses the force of the pressure strip 20, the battery cell 110 will undergo vertical upward displacement under the action of the expansion force, and at the same time, the battery cell 110 will undergo horizontal displacement under the shear force of the glue at the bottom of the battery cell, thereby affecting the performance of the battery module.

[0042] In the present application, the connection area 121 is provided on the insulating sheet 120, and the connection area 121 exposes the top surface 1101 of the battery cell 110, so that the pressure strip 20 is directly connected and fixed to the battery cell 110 in the connection area 121. During the expansion of the battery cell 110, the pressure strip 20 is always pressed against the top surface 1101 of the battery cell 110, and problems such as the pressure strip 20 being detached or shifted from the battery cell 110 will not occur. In a battery module, a plurality of battery cells 110 are usually included, and the pressure strip 20 is crimped onto the top surfaces of the plurality of battery cells 110. In the present application, the pressure strip 20 is always fixed to the battery cell 110, and fixes the plurality of battery cells 110 together to form a whole, while exerting vertical pressure on the battery cell 110. During the expansion of the battery cell 110, the battery cell 110 will generate vertical and horizontal expansion forces. At this time, the pressure strip 20 will exert vertical and horizontal inhibitory forces on the battery cell 110. In the vertical direction, the squeezing of adjacent battery cells 110 will cause the battery cells to move in the vertical direction, and the pressure strip 20 fixes the multiple battery cells 110 into a whole, which can suppress the vertical upward displacement of the battery cells 110 caused by the expansion of the battery cells; in the horizontal direction, the adjacent battery cells 110 are always connected and fixed to the pressure strip 20, so the battery cells 110 will not move in the horizontal direction due to the expansion force of the battery cells and the shear force of the glue at the bottom of the battery cells. Therefore, the battery 100 of the present application can more effectively suppress the expansion force of the battery cells 110 and reduce the shear force on the glue at the bottom of the battery cells 110, thereby improving the displacement of the battery module 200 in the horizontal and vertical directions.

[0043] In some embodiments, see Figure 3-Figure 7 The insulating sheet 120 has two opposite ends in a first direction X. The connection region 121 may be located at at least one end of the insulating sheet 120 in the first direction and / or between the two opposite ends of the insulating sheet 120 in the first direction. The insulating sheet 120 may include one or more connection regions 121, and this is not limited here. The first direction is the extension direction of the insulating sheet 120. For example, the battery cell may be a square battery cell, the insulating sheet 120 may be a rectangle, and the first direction may be the extension direction of the longer side of the rectangle, but is not limited thereto.

[0044] For example, the insulating sheet 120 includes two connecting areas 121. Figure 3-Figure 4 , the two connection areas 121 may be located at opposite ends of the insulating sheet 120 in the first direction; see Figure 5-Figure 6 , the two connection areas 121 may be located between the two opposite ends of the insulating sheet 120 in the first direction; Figure 7 One of the two connection areas 121 may be located at one end of the insulating sheet 120 in the first direction, and the other may be located between opposite ends of the insulating sheet 120 in the first direction.

[0045] In some embodiments, see Figure 3-Figure 4 When the connection area 121 is located at at least one end of the insulating sheet 120 in the first direction, the connection area 121 is a notch set at the end of the insulating sheet 120.

[0046] See also Figure 3 When the connection region 121 is located at the end of the insulating sheet 120, a notch may be provided at the end to expose the top surface 1101, so that the holding strip 20 contacts and connects with the battery cell 110 at the notch. The notch may be U-shaped, i.e., the edge of the end of the insulating sheet 120 is at least partially concave toward the center of the insulating sheet 120. The notch may also have other shapes, which are not limited here.

[0047] See also Figure 2 and Figure 4 When the connection area 121 is located at the end of the insulating sheet 120 in the first direction, the connection area 121 can also be formed by the edge of the end of the insulating sheet 120 being retracted as a whole, that is, the length of the insulating sheet 120 in the first direction is less than the length of the top surface 1101 in the first direction, and the opposite ends of the insulating sheet 120 in the first direction respectively expose the shoulders of the opposite ends of the top surface 1101 in the first direction. Figure 4 As shown, in the first direction, the distance a from the edge of the insulating sheet 120 to the center line C of the top surface 1101 is smaller than the distance b from the edge of the top surface 1101 on the same side to the center line C, and the area AA between the edge of the insulating sheet 120 on the top surface 1101 and the edge of the top surface 1101 is regarded as the connection area 121, wherein the center line C is perpendicular to the first direction, and the top surface 1101 is symmetrical about the center line C.

[0048] In some embodiments, see Figure 5 When the connection region 121 is located between opposite ends of the insulating sheet 120 in the first direction, the connection region 121 is a through hole provided on the insulating sheet 120. The through hole passes through the insulating sheet 120 in a direction perpendicular to the top surface 1101. The holding strip 20 is connected to the top surface 1101 exposed within the through hole at the through hole. The through hole can be regular or irregular in shape, for example, rectangular, circular, etc., but is not limited thereto.

[0049] In some embodiments, see Figure 6 When the connection area 121 is located between the opposite ends of the insulating sheet 120 in the first direction, the connection area 121 extends along the second direction Y and separates the insulating sheet 120 into a plurality of sub-insulating sheets arranged at intervals along the first direction, and the second direction is perpendicular to the first direction.

[0050] For details, please refer to Figure 6 The insulating sheet 120 includes two connection areas 121, both of which are located between opposite ends of the insulating sheet 120 in the first direction. The length of the insulating sheet 120 in the first direction may be equal to the length of the top surface 1101 in the first direction. The two connection areas 121 separate the insulating sheet 120 into three sub-insulating sheets, namely, a first sub-insulating sheet 1201, a second sub-insulating sheet 1202, and a third sub-insulating sheet 1203, which are arranged at intervals along the first direction. The area between the first sub-insulating sheet 1201 and the second sub-insulating sheet 1202 where the top surface 1101 is exposed is the first connection area 1211, and the area between the second sub-insulating sheet 1202 and the third sub-insulating sheet 1203 where the top surface 1101 is exposed is the second connection area 1212. In this embodiment, when the insulating sheet 120 is attached to the top surface 1101, it can be attached in three stages, that is, the first sub-insulating sheet 1201, the second sub-insulating sheet 1202 and the third sub-insulating sheet 1203 are attached to the corresponding areas of the top surface 1101 in sequence, and at the same time, the first connection area 1211 is reserved between the first sub-insulating sheet 1201 and the second sub-insulating sheet 1202, and the second connection area 1212 is reserved between the second sub-insulating sheet 1202 and the third sub-insulating sheet 1203.

[0051] In this application, please see Figure 1 The top surface 1101 of the battery 100 may be provided with one or more terminals 111, without limitation. The top surface 1101 of the battery 100 is also provided with an explosion-proof valve 112, a QR code 113, and the like. The locations of the terminals 111, the explosion-proof valve 112, and the QR code 113 on the top surface 1101 are not limited, but they must not overlap with the connection area 121. Correspondingly, the insulating sheet 120 is also provided with an explosion-proof valve hole 123, a QR code hole 124, and the like.

[0052] In some embodiments, see Figure 1The top surface 1101 is provided with a first pole 1111 and a second pole 1112, and an explosion-proof valve 112 located between the first pole 1111 and the second pole 1112. The insulating sheet 120 is provided with a first pole hole 1221 corresponding to the first pole 1111 and a second pole hole 1222 corresponding to the second pole 1112, as well as an explosion-proof valve hole 123 corresponding to the explosion-proof valve 112.

[0053] See also Figure 5 When the connection area 121 is located between the opposite ends of the insulating sheet 120 in the first direction, the connection area 121 is located between the first pole hole 1221 and the explosion-proof valve hole 123 and / or the second pole hole 1222 and the explosion-proof valve hole 123.

[0054] In this embodiment, the explosion-proof valve 112 can be located at the center of the top surface 1101 to facilitate uniform explosion-proof pressure relief. The first pole 1111 and the second pole 1112 can be symmetrically arranged about the explosion-proof valve 112. When the connection area 121 is located between the first pole hole 1221 or the second pole hole 1222 and the explosion-proof valve hole 123, the pressure strip 20 is installed between the first pole 1111 and the second pole 1112. Because the expansion force is greatest at the center of the battery cell 110, the closer the pressure strip 20 is to the center, the better the pressure strip 20 is at suppressing the battery cell expansion force.

[0055] In some embodiments, see Figure 4 The length of the battery cell 110 in the first direction is L, and the length of the connection area 121 in the first direction is M. The range of M is (L / 30-5) mm ≤ M ≤ (L / 30+5) mm. The length M of the connection area 121 in the first direction corresponds to the width of the bead 20 in the first direction. If the value of M is too small, the width of the bead 20 is too narrow and cannot suppress the expansion force of the battery cell 110. If the value of M is too large, the width of the bead 20 is too large, which occupies a large space and increases cost and weight.

[0056] Furthermore, when the length L of the battery cell 110 is ≥300 mm, the length M of the connection area 121 is greater than 10 mm; and when the length L of the battery cell 110 is less than 300 mm, the length M of the connection area 121 is less than 10 mm.

[0057] In some embodiments, see Figure 1The insulating sheet 120 is further provided with a detection hole 125, and the connection area 121 does not overlap with the detection hole 125. For example, the detection hole 125 can be a temperature / pressure sensor (NTC) hole, providing a space for a thermistor, probe, etc. to monitor the temperature of the battery cell 110 in real time and ensure the safety of the battery cell 110.

[0058] The detection hole 125 can be set close to the explosion-proof valve 112. For example, the distance between the detection hole 125 and the explosion-proof valve hole 123 can be 2mm-4mm. If the distance between the detection hole 125 and the explosion-proof valve hole 123 is too close, the connection between the detection hole 125 and the explosion-proof valve hole 123 on the insulating sheet 120 may be easily pulled apart. If the distance between the detection hole 125 and the explosion-proof valve hole 123 is too far, the line length of the NTC will be increased and the space utilization rate will be reduced.

[0059] In some embodiments, see Figure 1 The battery 100 further includes an outer protective film 130 , which may be a polymer film, such as a blue film. Specifically, the battery cell 110 further includes side surfaces located between the top surface 1101 and the bottom surface 1102 . The outer protective film 130 covers the bottom surface 1102 and the side surfaces to protect the battery cell 110 .

[0060] See also Figures 8-13 The present invention further provides a battery module 200, comprising a battery pack 10 and at least one holding strip 20. The battery pack 10 comprises at least one sub-battery pack 101, wherein the sub-battery pack 101 comprises a plurality of batteries 100 as described above, arranged along the second direction. The holding strip 20 extends along the second direction and is connected to the sub-battery pack 101. The holding strip 20 is disposed on a side of the top surface 1101 away from the bottom surface 1102 and is connected to the battery cell 110 via the connection region 121.

[0061] In the present application, the multiple batteries 100 in the sub-battery pack 101 have the same structure, so that the connection areas 121 on the multiple batteries 100 can be arranged and extended in the same direction, thereby facilitating alignment and connection between the holding strip 20 and the connection area 121 on each battery 100 in the sub-battery pack 101. The bottoms of the multiple batteries 100 in the sub-battery pack 101 are fixed to a fixing member using glue to secure the multiple batteries 100 together.

[0062] In the sub-battery pack 101, multiple batteries 100 are arranged along the second direction, that is, the connection areas 121 on the multiple batteries 100 are arranged along the second direction, and the bead 20 extends along the second direction in the same direction as the arrangement of the connection areas 121. The bead 20 covers the connection areas 121 arranged along the second direction and is connected to the corresponding battery cell 110 through the connection area 121 on each battery 100, so as to achieve a fixed connection between the bead 20 and each battery cell 110 in the sub-battery pack 101. The multiple batteries 100 in the sub-battery pack 101 are connected into a whole through the bead 20. Since the positions of the battery cell 110 and the bead 20 are relatively fixed, during the expansion of the battery cell 110, the bead 20 can suppress the expansion force of the battery cell 110 and reduce the shear force on the glue at the bottom of the battery cell 110, thereby improving the displacement of the battery module 200 in the horizontal and vertical directions.

[0063] The holding strip 20 and the battery cell 110 may be connected by bonding, for example, by structural adhesive, but not limited thereto.

[0064] In some embodiments, see Figures 8-10 The holding strip 20 is located at least at one end of the sub-battery group 101 in the first direction and / or between two opposite ends of the sub-battery group 101 in the first direction.

[0065] Specifically, taking one sub-battery group 101 corresponding to two holding strips 20 as an example, the two holding strips 20 are parallel and extend along the second direction, and each battery 100 of the corresponding sub-battery group 101 includes two connection areas 121. Figure 8 The two holding strips 20 may be located at opposite ends of the sub-battery group 101 in the first direction. In this case, the two connection areas 121 of the battery 100 are located at opposite ends of the insulating sheet 120 in the first direction. Figure 9 , the two holding strips 20 may be located between the two opposite ends of the sub-battery group 101 in the first direction. In this case, the two connecting areas 121 of the battery 100 are located between the two opposite ends of the insulating sheet 120 in the first direction. Figure 10 One of the two pressure strips 20 can be located at one end of the sub-battery group 101 in the first direction, and the other can be located between the opposite ends of the sub-battery group 101 in the first direction. At this time, one of the two connecting areas 121 of the battery 100 is located at one end of the insulating sheet 120 in the first direction, and the other is located between the opposite ends of the insulating sheet 120 in the first direction.

[0066] For further information, see Figure 9 When the pressure strip 20 is located between the opposite ends of the sub-battery group 101 in the first direction, the pressure strip 20 is located between the first pole 1111 and the explosion-proof valve 112 and / or between the second pole 1112 and the explosion-proof valve 112.

[0067] In some embodiments, see Figure 11-13 When the battery pack 10 includes multiple sub-battery packs 101, the multiple sub-battery packs 101 are arranged along the first direction. The battery module 200 includes a first pressure strip 210 and a second pressure strip 220. The first pressure strip 210 is located between opposite ends of the sub-battery pack 101 in the first direction or at least one end of the battery pack 10 in the first direction. The second pressure strip 220 is located between and connected to two adjacent sub-battery packs 101.

[0068] See also Figure 11-12 When the connection area 121 of the battery 100 is located at the end of the insulating sheet 120 in the first direction, and the connection areas 121 of two adjacent sub-battery groups 101 are adjacent, the two adjacent sub-battery groups 101 can share a second pressure strip 220, and the second pressure strip 220 is connected to the two adjacent sub-battery groups 101. In this case, the second pressure strip 220 can simultaneously suppress the expansion force of the battery cells of the two adjacent sub-battery groups 101.

[0069] In some embodiments, the length of the second pressure strip 220 in the first direction is twice the length of the first pressure strip 210 in the first direction, so as to simultaneously satisfy the expansion force suppression function of two adjacent sub-battery groups 101 .

[0070] For details, please refer to Figure 11 The battery module 200 includes a first bead 210 and a second bead 220. The first bead 210 is located at both ends of the battery pack 10 in the first direction, and the second bead 20 is located between two adjacent sub-battery packs 101. This means that two adjacent sub-battery packs 101 share one second bead 220. This embodiment fully utilizes the space at the shoulders of the battery cells 110. A thickened second bead 220 is provided between two adjacent sub-battery packs 101, effectively controlling the expansion of the left and right battery cells and improving the appearance.

[0071] See also Figure 12The battery module 200 includes a first bead 210 and a second bead 220. The first bead 210 is located between opposite ends of the sub-battery assembly 101 in the first direction, for example, between the terminal 111 and the explosion-proof valve 112. The second bead 20 is located between two adjacent sub-battery assemblies 101, meaning that two adjacent sub-battery assemblies 101 share one second bead 220. In this embodiment, the first bead 210 is located near the center of the battery 100 to more effectively suppress expansion forces. Furthermore, the thickened second bead 220 provided between two adjacent sub-battery assemblies 101 can simultaneously control the degree of expansion on both sides.

[0072] See also Figure 13 Alternatively, the battery module 200 may include only the first holding strips 210 without the second holding strips 220, with the first holding strips 210 positioned between the opposite ends of the sub-battery pack 101 in the first direction. In this embodiment, the first holding strips 210 are positioned near the center of the battery 100, thereby more effectively suppressing expansion force. However, this reduces space utilization and prevents simultaneous suppression of adjacent sub-battery packs 101.

[0073] In the present application, the material of the pressure strip may be metal, such as aluminum or steel, but is not limited thereto.

[0074] The present invention provides a battery and a battery module, wherein the top surface of the battery is provided with an insulating sheet, the insulating sheet is provided with a connection area, the connection area exposes the top surface of the battery cell, and the bead is connected to the top surface of the battery cell through the connection area. In the present application, since the insulating sheet is provided with a connection area to avoid the bead, the bead is directly connected and fixed to the battery cell through the connection area. During the expansion of the battery cell, the bead is always pressed against the top surface of the battery cell, and problems such as the bead detaching from or shifting the battery cell will not occur. Therefore, in the present application, the bead can more effectively suppress the expansion force of the battery cell and reduce the shear force on the glue at the bottom of the battery cell, thereby improving the displacement of the battery module in the horizontal and vertical directions.

[0075] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A battery, characterized in that: include: A battery cell having a top surface and a bottom surface opposite to each other, wherein the top surface is provided with at least one pole; An insulating sheet is provided on a side of the top surface away from the bottom surface, the insulating sheet is provided with a connection area, the connection area exposes the top surface, and the pressure strip is connected to the battery core through the connection area.

2. The battery according to claim 1, characterized in that The insulating sheet has two opposite ends in a first direction, and the connection area is located at least one end of the insulating sheet in the first direction and / or between the two opposite ends of the insulating sheet in the first direction. The first direction is the extension direction of the insulating sheet.

3. The battery according to claim 2, characterized in that When the connection area is located at at least one end of the insulating sheet in the first direction, the connection area is a notch provided at the end of the insulating sheet.

4. The battery according to claim 2, characterized in that When the connection area is located between opposite ends of the insulating sheet in the first direction, the connection area is a through hole provided on the insulating sheet, and the through hole passes through the insulating sheet in a direction perpendicular to the top surface.

5. The battery according to claim 2, characterized in that When the connection area is located between the opposite ends of the insulating sheet in the first direction, the connection area extends along the second direction and divides the insulating sheet into a plurality of sub-insulating sheets arranged at intervals along the first direction, and the second direction is perpendicular to the first direction.

6. The battery according to claim 2, characterized in that The top surface is provided with a first pole and a second pole, and an explosion-proof valve located between the first pole and the second pole; the insulating sheet is provided with a first pole hole corresponding to the first pole, a second pole hole corresponding to the second pole, and an explosion-proof valve hole corresponding to the explosion-proof valve; When the connection area is located between opposite ends of the insulating sheet in the first direction, the connection area is located between the first pole hole and the explosion-proof valve hole and / or between the second pole hole and the explosion-proof valve hole.

7. The battery according to any one of claims 1 to 6, characterized in that: The length of the battery core in the first direction is L, the length of the connection area in the first direction is M, and (L / 30-5) mm≤M≤(L / 30+5) mm.

8. The battery according to any one of claims 1 to 6, characterized in that: The insulating sheet is further provided with a detection hole, and the connection area does not overlap with the detection hole.

9. A battery module, characterized in that: include: A battery pack, comprising at least one sub-battery pack, wherein the sub-battery pack comprises a plurality of batteries according to any one of claims 1 to 8, wherein the plurality of batteries are arranged along a second direction; at least one holding strip extending along the second direction and connected to the sub-battery pack; The pressure strip is arranged on a side of the top surface away from the bottom surface, and is connected to the battery core through the connection area.

10. The battery module according to claim 9, characterized in that: The sub-battery group has two opposite ends in a first direction, the pressing bar is located at least one end of the sub-battery group in the first direction and / or between two opposite ends of the sub-battery group in the first direction, and the first direction is perpendicular to the second direction.

11. The battery module according to claim 10, characterized in that: The battery pack includes a plurality of sub-battery packs, and the plurality of sub-battery packs are arranged along the first direction; The battery module includes a first pressure strip and a second pressure strip, the first pressure strip is located between the opposite ends of the sub-battery group in the first direction or at least one end of the battery group in the first direction, and the second pressure strip is located between two adjacent sub-battery groups and connected to the two adjacent sub-battery groups.

12. The battery module according to claim 11, characterized in that: The length of the second layer in the first direction is twice the length of the first layer in the first direction.

13. The battery module according to any one of claims 9 to 12, characterized in that: The pressure strip is connected to the battery core by bonding.

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