Battery pack cover body structure and battery pack

Abstract

The present application provides a battery pack cover body structure, and a battery pack. A substrate is used for covering a box body, the substrate and the box body defining a containing cavity, and the containing cavity being used for containing multiple single battery cells and foamed adhesive arranged along multiple adhesive filling tracks. An exhaust part is disposed adjacent to a middle part of the substrate, the exhaust part being provided with multiple exhaust holes, and at least one exhaust hole being formed between every two adjacent adhesive filling tracks, so that gas is discharged in a timely manner during the entire foam filling and sealing process of the battery pack, and residual bubbles in the box cover are prevented.

Description

Battery pack cover structure and battery pack

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 30, 2024, with application number 2024206537349. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery pack cover structure and a battery pack. Background Art

[0003] The battery pack uses filling and foaming technology, which can protect the battery from the influence of dust, temperature and humidity, reduce the risk of moisture, corrosion and short circuit; it can relieve the internal temperature of the battery and improve the safety of the battery; it also helps to reduce shock and extend the battery life. Technical issues

[0004] In the related art, for fully encapsulated foamed battery packs, many bubbles usually remain on the inside of the box cover during the foaming process and cannot be discharged. Cavitation areas are easily formed where the bubbles remain. The cavitation areas will directly affect the bonding performance of the box cover, resulting in a reduction in the overall strength of the battery pack. Technical Solutions

[0005] In a first aspect, the present application provides a battery pack cover structure, comprising:

[0006] The base plate is used to cover the box body, and the base plate and the box body are enclosed to form a receiving cavity, which is used to accommodate multiple single battery cells and foam glue arranged along multiple glue-filling tracks;

[0007] The exhaust part is arranged adjacent to the middle of the substrate; the exhaust part is provided with a plurality of exhaust holes, and at least one exhaust hole is provided between two adjacent glue filling tracks.

[0008] In a second aspect, the present application provides a battery pack, comprising a plurality of single cells, a box body, and a battery pack cover structure provided by the present application;

[0009] The battery pack cover structure and the box body are combined to form a receiving cavity, each single battery cell is arranged in the receiving cavity, and foam glue is arranged in the receiving cavity. Beneficial effects

[0010] The battery pack cover structure and battery pack provided by the present application have the following beneficial effects: the battery pack cover structure of the present application includes a substrate and an exhaust portion, the substrate is used to cover the box body, the substrate and the box body enclose a housing cavity, the housing cavity is used to accommodate multiple single battery cells and foam glue arranged along multiple glue injection tracks; the exhaust portion is arranged adjacent to the middle of the substrate; the exhaust portion is provided with multiple exhaust holes, and at least one exhaust hole is provided between two adjacent glue injection tracks, so as to achieve timely exhaust of gas during the full encapsulation and foaming process of the battery pack and avoid residual bubbles in the box cover; the present application arranges the exhaust hole adjacent to the middle of the substrate, and at least one exhaust hole is located between two adjacent glue injection tracks, so that during full encapsulation and foaming, the foam glue merges from the two adjacent glue injection tracks toward the middle, and the bubbles are slowly squeezed to the middle. The exhaust hole provided between the two adjacent glue injection tracks can effectively exhaust the bubbles generated in the box body due to the foaming process, avoid cavitation caused by foaming, improve the adhesion performance of the box cover and the overall strength of the foam glue, thereby improving the overall strength of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG1 is a schematic diagram of the assembly structure of a battery pack cover structure provided in the present application;

[0012] FIG2 is a schematic structural diagram of a battery pack cover structure provided by the present application from a first perspective;

[0013] FIG3 is a schematic structural diagram of the battery pack cover structure provided by the present application from a second perspective;

[0014] FIG4 is a schematic structural diagram of point A in FIG3 .

[0015] Reference numerals:

[0016] 100, substrate; 200, exhaust portion; 210, exhaust area; 212, exhaust hole; 300, fixing portion; 310, fixing hole; 400, single cell; 500, glue filling track. Modes for Carrying Out the Invention

[0017] In one embodiment, as shown in Figures 1 and 2, a battery pack cover structure is provided, including a substrate 100 and a vent portion 200; the substrate 100 is used to cover a box body, and the substrate 100 and the box body are enclosed to form a accommodating cavity, which is used to accommodate a plurality of single battery cells 400 and foam glue arranged along a plurality of glue filling tracks 500; the vent portion 200 is arranged adjacent to the middle of the substrate 100; the vent portion 200 is provided with a plurality of exhaust holes 212, and at least one exhaust hole 212 is provided between two adjacent glue filling tracks 500.

[0018] The housing can be a metal housing or a non-metal housing. The housing has an opening, and the substrate 100 is used to cover the opening in the housing to achieve a sealed housing. The substrate 100 can be a metal substrate 100 or a non-metal substrate 100. For example, the substrate 100 can be a flat plate structure, and the shape of the substrate 100 can be polygonal. It should be noted that the specific shape of the substrate 100 can be determined by the shape of the housing, that is, it can be flat or non-flat.

[0019] The housing and substrate 100 together form a housing cavity, which can be used to accommodate multiple individual cells 400. The individual cells 400 are arranged in an array, for example, in multiple rows and columns. The tops of the individual cells 400 are positioned adjacent to the substrate 100, while the bottoms of the individual cells 400 are positioned adjacent to the bottom of the housing. The tops of the individual cells 400 can serve as electrode output terminals. For example, the individual cells 400 are cylindrical.

[0020] The storage cavity can also be used to accommodate foam glue. For example, a foaming machine can be used to output foam glue. The foaming machine can pour the foam glue into the storage cavity where the corresponding battery cell 400 is located based on a preset glue pouring track 500, thereby forming foam glue arranged along the preset glue pouring track 500 within the storage cavity. For example, the preset glue pouring track 500 can be an S-shaped glue pouring track 500, that is, the preset glue pouring track 500 can be divided into multiple glue pouring tracks, thereby forming foam glue arranged along the multiple glue pouring tracks 500 within the storage cavity. The foam glue immediately after being poured into the storage cavity is in a liquid state and has fluidity. When the foam glue in the corresponding glue pouring track 500 comes into contact with air, it expands, thereby allowing the foam glue to completely fill the gaps between the battery cells 400 and thus fill the remaining space within the storage cavity. It should be noted that when the foam glue is in contact with the air for a preset time, the foam glue will solidify and then form solid foam glue, which can fix each single battery cell 400 in the accommodating cavity, prevent the single battery cell 400 from shaking, and at the same time prevent the single battery cell 400 from being affected by dust, temperature and humidity, reduce the risk of battery moisture, corrosion and short circuit, and improve the safety of the battery pack; it also helps to reduce shock and extend the battery life.

[0021] The exhaust portion 200 is integrally formed with the substrate 100. The exhaust portion 200 may be elongated. For example, the exhaust portion 200 intersects each glue injection track 500. For example, the exhaust portion 200 may be perpendicular to each glue injection track 500. The center of the substrate 100 refers to the center point of the substrate 100. The exhaust portion 200 may be provided with a plurality of exhaust holes 212, which are spaced apart.

[0022] By setting the exhaust portion 200 adjacent to the middle of the substrate 100 and providing at least one exhaust hole 212 between two adjacent glue filling tracks 500, when the battery pack is fully encapsulated and foamed, the foamed glue merges toward the middle from the two adjacent glue filling tracks 500, and the bubbles are slowly squeezed to the middle. The exhaust hole 212 provided between the two adjacent glue filling tracks 500 can effectively exhaust the gas, thereby avoiding cavitation caused by foaming.

[0023] In one example, four glue filling tracks 500 are provided in the box, and one glue filling track 500 is provided for every four columns of single battery cells 400. At least one exhaust hole 212 is located between two adjacent glue filling tracks 500, and the exhaust hole 212 is located near the middle position of the glue filling track 500. When each single battery cell 400 in the box is fully encapsulated and foamed, the foamed glue merges from the two adjacent glue filling tracks 500 toward the middle, and the bubbles are slowly squeezed to the middle of the glue filling track 500. The gas can be effectively discharged through the exhaust holes 212 provided between the two adjacent glue filling tracks 500 to avoid residual bubbles in the box.

[0024] It should be noted that when the substrate 100 is in the open state, foam glue can be poured into the box through a foaming machine, and after the glue filling is completed, the substrate 100 is covered on the opening of the box to achieve sealing of the box. After the foam glue foams and expands in the box, it gradually fills the accommodating cavity space of the box, and the gas is discharged through the exhaust hole 212 provided in the exhaust part 200, thereby effectively discharging the bubbles generated in the box due to the foaming process.

[0025] In an embodiment of the present application, a box body is covered by a substrate 100, and the substrate 100 and the box body are enclosed to form a accommodating cavity, which is used to accommodate multiple single battery cells 400 and foam glue arranged along multiple glue filling tracks 500; the exhaust part 200 is arranged adjacent to the middle of the substrate 100; the exhaust part 200 is provided with multiple exhaust holes 212, and at least one exhaust hole 212 is provided between two adjacent glue filling tracks 500, so as to realize timely exhaust of gas during the full encapsulation and foaming process of the battery pack to avoid residual bubbles in the box cover. In the embodiment of the present application, the exhaust holes 212 are arranged near the middle of the substrate 100, and at least one exhaust hole 212 is located between two adjacent glue filling tracks 500. Therefore, during full encapsulation and foaming, the foamed glue merges toward the middle from the two adjacent glue filling tracks 500, and the bubbles are slowly squeezed to the middle. The exhaust holes 212 arranged between the two adjacent glue filling tracks 500 can effectively discharge the bubbles generated in the box due to the foaming process, avoid cavitation caused by foaming, improve the bonding performance of the box cover and the overall strength of the foamed glue, and thus improve the overall strength of the battery pack.

[0026] In one embodiment, as shown in FIG. 2 , the exhaust portion 200 includes a plurality of exhaust regions 210 , which are spaced apart. The exhaust regions 210 are provided with a plurality of exhaust holes 212 , and an exhaust hole 212 corresponding to the exhaust region 210 is provided between every two adjacent glue-filling tracks 500 .

[0027] The exhaust region 210 is in the shape of an elongated strip. For example, the exhaust portion 200 may include four exhaust regions 210, which are spaced apart from each other. For example, the four exhaust regions 210 may be symmetrically arranged around the central axis of the substrate 100, which is perpendicular to the glue injection track 500.

[0028] The exhaust area 210 is provided with multiple exhaust holes 212, and the number of exhaust holes 212 can be determined according to the number of single battery cells 400 in the accommodating cavity. For example, one glue filling track 500 can be set for every four columns of single battery cells 400, that is, exhaust holes 212 of corresponding exhaust areas 210 are set in every four columns of single battery cells 400.

[0029] By arranging the exhaust portion 200 adjacent to the middle of the substrate 100 and providing an exhaust hole 212 corresponding to the exhaust area 210 between each two adjacent glue tracks 500, when the battery pack is fully encapsulated and foamed, the foamed glue merges toward the middle from the two adjacent glue tracks 500, and the bubbles are squeezed toward the middle of the glue tracks 500. When the bubbles are adjacent to the exhaust holes 212 in the exhaust area 210, the bubbles can be discharged through the exhaust holes 212 in the corresponding exhaust area 210. The exhaust holes 212 provided between the two adjacent glue tracks 500 can effectively discharge gas, avoiding cavitation caused by foaming. By providing multiple exhaust holes 212 at intervals between the two adjacent glue tracks 500 along the glue tracks 500, due to the displacement of the foamed glue during the foaming process, the bubbles can be discharged from the adjacent exhaust holes 212, avoiding congestion and failure to discharge in time, thereby effectively improving the efficiency of bubble discharge and ensuring that the bubbles can be completely discharged.

[0030] For example, the number of exhaust regions 210 can be determined based on the size of the housing cavity. For example, for a larger housing cavity, the corresponding glue injection track is longer, and the exhaust section 200 can be provided with multiple exhaust regions 210. The multiple exhaust regions 210 are spaced apart, so that multiple exhaust holes 212 are spaced apart along the glue injection track 500 between two adjacent glue injection tracks 500. Since the foaming glue will move during the foaming process, bubbles can be discharged from adjacent exhaust holes 212, avoiding congestion and failure to be discharged in time, thereby effectively improving the efficiency of bubble discharge and ensuring that the bubbles can be completely discharged. For a smaller housing cavity, the corresponding glue injection track is shorter, and the exhaust section 200 can be provided with one exhaust region 210. The exhaust region 210 is spaced apart in the middle of the substrate 100, so that bubbles are squeezed toward the middle of the glue injection track 500. When bubbles are adjacent to the exhaust holes 212 of the exhaust region 210, the bubbles can be discharged through the exhaust holes 212 of the corresponding exhaust region 210, avoiding cavitation caused by foaming.

[0031] It should be noted that the vent hole 212 is connected to the external environment, so the size of the vent hole 212 should not be too large or too small. If the vent hole 212 is too large, excessive foam will be discharged from the vent hole, affecting the appearance of the product; if the vent hole 212 is too small, it will easily become clogged, resulting in the inability to completely discharge bubbles in the box.

[0032] In one embodiment, the box body is provided with a plurality of first marking lines corresponding to the glue filling tracks, and the substrate 100 is provided with a second marking line corresponding to each first marking line; an exhaust hole 212 corresponding to the exhaust area 210 is provided between every two adjacent second marking lines.

[0033] Among them, a plurality of first marking lines can be set on one side of the box body, and the plurality of first marking lines correspond one-to-one to a plurality of glue filling tracks 500. Then, when glue needs to be filled into the box body, foam glue can be poured into the box body based on the first marking lines, that is, foam glue arranged along the preset glue filling track is formed in the box body.

[0034] The substrate 100 is provided with a plurality of second marking lines, each corresponding to the plurality of first marking lines. For example, when the substrate 100 is placed on a housing, the second marking lines can be located on the same straight line as the corresponding first marking lines. It should be noted that the second marking lines can be provided on the substrate by silk screen printing or engraving, and the first marking lines can be provided on the substrate by silk screen printing or engraving.

[0035] By setting a first marking line on the box body, it is convenient for the user to fill the foam glue into the box body based on the preset glue filling track 500. By setting a second marking line on the substrate 100, it is convenient to match and position the second marking line with the corresponding glue filling track. When the battery pack is fully encapsulated and foamed, the foam glue merges from the two adjacent second marking lines toward the middle, and the bubbles are squeezed toward the middle of the second marking lines. Then, when the bubbles are adjacent to the exhaust holes 212 of the exhaust area 210, the bubbles can be discharged through the exhaust holes 212 of the corresponding exhaust area 210, avoiding cavitation caused by foaming.

[0036] In one embodiment, the distance between the exhaust area 210 and the bottom of the box is greater than the distance between the substrate 100 and the bottom of the box.

[0037] For example, the exhaust area 210 may be a convex structure, so that the distance between the exhaust area 210 and the bottom of the box is greater than the distance between the substrate 100 and the bottom of the box, that is, the relative height of the exhaust area 210 and the box is greater than the relative height of the substrate 100 and the box, so that the exhaust hole 212 of the exhaust area 210 is located at the highest point of the substrate 100, so that when the battery pack is fully encapsulated and foamed, the foamed glue merges toward the middle from the two adjacent glue filling tracks 500, and the bubbles are slowly squeezed to the middle. By setting the exhaust hole 212 between the two adjacent glue filling tracks 500, and based on the exhaust hole 212 being located at the highest point of the substrate 100, the bubbles generated in the box due to the foaming process can be effectively discharged, and cavitation caused by foaming can be avoided. The bonding performance of the box cover and the overall strength of the foamed glue can be improved, thereby improving the overall strength of the battery pack.

[0038] In one embodiment, as shown in FIG. 3 and FIG. 4 , the plurality of exhaust holes 212 in the same exhaust area 210 are arranged at equal intervals.

[0039] For example, if eight glue filling tracks 500 are provided in the accommodating cavity, seven exhaust holes 212 are provided in the same exhaust area 210, and one exhaust hole 212 of the corresponding exhaust area 210 is provided between two adjacent glue filling tracks 500. It is set that one glue filling track 500 is provided for every four columns of single battery cells 400. By equidistantly arranging the multiple exhaust holes 212 of the same exhaust area 210, the corresponding exhaust holes 212 of the exhaust area 210 are located in the middle of two adjacent glue filling tracks 500. When the multiple single battery cells 400 in the box are fully encapsulated and foamed, the foamed glue merges from the two adjacent glue filling tracks 500 toward the middle, and the bubbles are slowly squeezed to the middle of the glue filling track 500. The gas can be effectively discharged through the exhaust holes 212 provided between the two adjacent glue filling tracks 500, avoiding residual bubbles in the box, thereby improving the bonding performance of the box cover and the overall strength of the foamed glue.

[0040] Exemplarily, as shown in FIG. 3 , the plurality of exhaust holes 212 in the same exhaust region 210 are arranged along the same central axis, and the central axis is perpendicular to the glue filling track 500 .

[0041] For example, the glue dispensing track 500 can be linear, with multiple glue dispensing tracks 500 sequentially connected to form an S-shaped glue dispensing track 500. The multiple vent holes 212 in the same vent area 210 have the same size and shape. For example, the vent holes 212 can be circular. The central axis can be the central longitudinal axis of the vent area 210. The central axis overlaps with a line connecting the center points of the multiple vent holes 212.

[0042] Based on the multiple exhaust holes 212 in the same exhaust area 210, they are arranged along the same central axis, and the central axis is perpendicular to the glue injection track 500. The corresponding exhaust holes 212 in the exhaust area 210 are located in the middle of two adjacent glue injection tracks 500. When the box is fully encapsulated and foamed, the foam glue merges from the two adjacent glue injection tracks 500 toward the middle, and the bubbles are slowly squeezed to the middle of the glue injection track 500. The exhaust holes 212 set between the two adjacent glue injection tracks 500 can effectively discharge the gas to avoid residual bubbles in the box, thereby improving the box cover bonding performance and the overall strength of the foam glue; in addition, the simplified design of the cover structure can reduce the internal beams of the box, thin the box wall thickness, and the corresponding number of fasteners can also be reduced, thereby reducing the weight of the battery pack, while also improving the energy density of the battery pack and reducing costs.

[0043] In one embodiment, as shown in FIG. 3 and FIG. 4 , the width of the exhaust region 210 is smaller than the spacing distance between two adjacent exhaust regions 210 .

[0044] For example, by setting the exhaust area 210 as a raised structure, the relative height of the exhaust area 210 is greater than the relative height of the substrate 100. In addition, by setting the width of the exhaust area 210 to be smaller than the spacing distance between the two adjacent exhaust areas 210, when the box is fully encapsulated and foamed, the foam glue merges toward the middle from the two adjacent glue filling tracks 500, so that the bubbles are slowly squeezed to the exhaust area 210, and then discharged through the exhaust holes 212 on the exhaust area 210, so that the bubbles generated in the box due to the foaming process can be effectively discharged by setting the exhaust holes 212 in the corresponding exhaust area 210 between the two adjacent glue filling tracks 500, avoiding cavitation caused by foaming, and can improve the bonding performance of the box cover and the overall strength of the foam glue, thereby improving the overall strength of the battery pack.

[0045] In one embodiment, the diameter of the exhaust hole 212 is between 3 mm and 6 mm (millimeter). The diameter of the exhaust hole 212 refers to the diameter of the exhaust hole 212. For example, the diameter of the exhaust hole 212 can be 3 mm, 5 mm, or 6 mm.

[0046] By setting the aperture of the exhaust hole 212 between 3mm and 6mm, when the multiple single battery cells 400 in the box are fully encapsulated and foamed, the foam glue merges from the two adjacent glue filling tracks 500 toward the middle, and the bubbles are slowly squeezed to the middle of the glue filling track 500. The exhaust hole 212 set between the two adjacent glue filling tracks 500 can effectively discharge the bubbles generated in the box due to the foaming process, avoiding the exhaust hole 212 being too small to cause blockage and inability to discharge bubbles in time, and avoiding the exhaust hole 212 being too large to cause foam glue to be discharged, effectively improving the bonding performance of the box cover and the overall strength of the foam glue, thereby improving the overall strength of the battery pack.

[0047] In one embodiment, as shown in FIG. 2 and FIG. 3 , the battery pack cover structure further includes a fixing portion 300 . The fixing portion 300 is disposed on the substrate 100 , and the fixing portion 300 is provided with a plurality of fixing holes 310 .

[0048] The fixing portion 300 may be provided with two fixing holes 310 spaced apart. For example, fasteners (such as bolts) may be passed through the fixing holes 310 to secure the substrate 100 to the housing. This allows the substrate 100 to be mounted on the housing, simplifying the design of the cover structure, reducing internal beams, eliminating the need for excessive fasteners, and reducing the weight of the battery pack. This also increases the energy density of the battery pack and reduces costs.

[0049] In one embodiment, a battery pack is also provided, comprising a plurality of single battery cells, a box body and a battery pack cover structure provided in an embodiment of the present application; the battery pack cover structure and the box body are combined to form a accommodating cavity, a plurality of single battery cells are arranged in the accommodating cavity, and foam glue is arranged in the accommodating cavity.

[0050] The individual cells may be cylindrical lithium-ion cells. Multiple individual cells may be closely arranged in multiple rows and columns within a receiving cavity. Foaming glue may be poured into the receiving cavity using a foaming machine. The foaming machine may pour the foaming glue into the receiving cavity containing the corresponding individual cells along a predetermined glue pouring path, thereby forming foamed glue within the receiving cavity along the predetermined glue pouring path.

[0051] For the specific description of the battery pack cover structure, single battery cells and box body, please refer to the specific description of the battery pack cover structure, single battery cells and box body in the embodiments of the present application, which will not be repeated here.

[0052] In the embodiment of the present application, a box body is provided by a substrate cover, and the substrate and the box body are enclosed to form a accommodating cavity, which is used to accommodate multiple single battery cells and foam glue arranged along multiple glue-filling tracks; the exhaust portion is provided near the middle of the substrate; the exhaust portion is provided with multiple exhaust holes, and at least one exhaust hole is provided between two adjacent glue-filling tracks, so as to achieve timely exhaust of gas during the full encapsulation and foaming process of the battery pack and avoid residual bubbles in the box cover. The present application arranges the exhaust holes near the middle of the substrate, and at least one exhaust hole is located between two adjacent glue-filling tracks, so that during full encapsulation and foaming, the foam glue merges from the two adjacent glue-filling tracks toward the middle, and the bubbles are slowly squeezed to the middle. The exhaust holes provided between the two adjacent glue-filling tracks can effectively exhaust the bubbles generated in the box body due to the foaming process, avoid cavitation caused by foaming, improve the box cover bonding performance and the overall strength of the foam glue, and thus improve the overall strength of the battery pack.

[0053] It should be noted that the battery pack may also include components such as output electrodes. The specific battery pack may include more components than those described in the embodiments of the present application, or combine certain components, or have a different component arrangement.

Claims

1. A battery pack cover structure, comprising: A base plate, the base plate is used to cover the box body, the base plate and the box body enclose a receiving cavity, the receiving cavity is used to accommodate multiple single battery cells and foam glue arranged along multiple glue-filling tracks; The exhaust portion is arranged adjacent to the middle of the substrate; the exhaust portion is provided with a plurality of exhaust holes, and at least one exhaust hole is provided between two adjacent glue-filling tracks.

2. The battery pack cover structure according to claim 1, wherein: The exhaust portion includes a plurality of exhaust areas, the plurality of exhaust areas are arranged at intervals, the exhaust areas are provided with a plurality of exhaust holes, and an exhaust hole corresponding to the exhaust area is provided between every two adjacent glue filling tracks.

3. The battery pack cover structure according to claim 2, wherein: The distance between the exhaust area and the bottom of the box is greater than the distance between the substrate and the bottom of the box.

4. The battery pack cover structure according to claim 2, wherein: The plurality of exhaust holes in the same exhaust area are arranged at equal intervals.

5. The battery pack cover structure according to claim 4, wherein: The plurality of exhaust holes in the same exhaust area are arranged along the same central axis, and the central axis is perpendicular to the glue pouring track.

6. The battery pack cover structure according to claim 4, wherein: The width of the exhaust area is smaller than the spacing between two adjacent exhaust areas.

7. The battery pack cover structure according to claim 1, wherein: The exhaust hole is a circular hole.

8. The battery pack cover structure according to claim 7, wherein: The diameter of the exhaust hole is between 3 mm and 6 mm.

9. The battery pack cover structure according to claim 2, wherein: The box body is provided with a plurality of first marking lines corresponding to the glue pouring tracks.

10. The battery pack cover structure according to claim 9, wherein: The substrate is provided with a plurality of second marking lines corresponding to the first marking lines; and an exhaust hole corresponding to the exhaust area is provided between every two adjacent second marking lines. 11 . The battery pack cover structure according to claim 1 , further comprising a fixing portion, wherein the fixing portion is provided on the substrate and has a plurality of fixing holes.

12. A battery pack comprising a plurality of single cells, a box, and the battery pack cover structure according to any one of claims 1 to 11; The battery pack cover structure and the box body are combined to form a receiving cavity, and a plurality of the single battery cells are arranged in the receiving cavity. Foam glue is arranged in the receiving cavity.

Images