Sealing element, battery pack filling assembly, battery pack and electric equipment

Abstract

The utility model relates to a sealing element, a battery pack filling assembly, a battery pack and electric equipment, the sealing element is used for being arranged between a battery cell group and a beam of a tray of the battery pack, the sealing element has an expansion state, and in the expansion state, the sealing element is suitable for defining a glue injection space together with the battery cell group and the beam of the tray; the sealing element is provided with a binding surface which is suitable for being arranged opposite to a beam of the battery cell group or the tray, the binding surface comprises a bonding area and a non-bonding area, the bonding area is suitable for being bonded with the beam of the battery cell group or the tray, and the non-bonding area at least comprises a binding surface positioned on a bending part of the sealing element. The binding surface of the bent part of the sealing element is the non-sticking area, so that the binding force of the sticking area on the bent part of the sealing element in the expansion process can be reduced, the sufficient expansion of the bent part is facilitated, the bent part can be better attached to a battery cell group or a beam of a tray, the sealing effect of a glue injection space is further improved, and the service life of the battery cell group is prolonged. And the glue in the glue injection space is prevented from leaking from the bent part.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery packs, and in particular, to a seal, a battery pack filling assembly, a battery pack and an electrical device. Background Art

[0002] The battery pack capacity retention rate affects the range of electric vehicles and is one of the important indicators for evaluating the comprehensive performance of the battery pack. The battery pack usually includes a tray and a battery cell group arranged in the tray. The battery cell group is composed of multiple stacked batteries. In order to smoothly load the battery cell group into the tray of the battery pack, there is usually an assembly gap between the beam of the tray and the battery cell group. The battery cell group has a movable space in the tray, which causes gaps between the batteries. Studies have shown that this gap will cause the capacity of the battery cell to decrease as the number of charge and discharge cycles increases, thereby reducing the capacity retention rate of the entire battery pack. Therefore, it is very necessary to fill the gap between the beam of the tray and the battery cell group. However, the filling effect of this gap in the related art is not ideal. Utility Model Content

[0003] The purpose of the present disclosure is to provide a seal, a battery pack filling assembly, a battery pack and an electrical device to at least partially solve the technical problems existing in the related art.

[0004] In order to achieve the above-mentioned object, according to a first aspect of the present disclosure, there is provided a sealing member, which is used to be arranged between a battery cell group and a beam of a tray of a battery pack, and the sealing member has an expanded state, in which the sealing member is suitable for defining a glue injection space together with the battery cell group and the beam of the tray;

[0005] The sealing member has a fitting surface adapted to be arranged opposite to the battery cell group or the beam of the tray, wherein the fitting surface includes a pasting area and a non-pasting area;

[0006] The adhesive region is suitable for bonding with the battery cell group or the beam of the tray;

[0007] The non-adhesive area at least includes a bonding surface located on a bent portion of the sealing member.

[0008] Optionally, the sealing member comprises a first section and two second sections, the first ends of the two second sections are respectively connected to the opposite ends of the first section, and there is a gap between the second ends of the two second sections, wherein the two second sections are arranged at an angle to the first section;

[0009] The bending portion at least includes a connecting portion between the first section and the second section;

[0010] The bonding surface located on the first section is provided with the bonding area.

[0011] Optionally, the non-adhesive area further includes a bonding surface located on the second section.

[0012] Optionally, a side wall of a connecting portion between the first section and the second section facing the glue injection space is an arc-shaped wall.

[0013] Optionally, the first ends of the two second segments are respectively connected to the two opposite ends of the first segment in the first direction, and the projection of the arc-shaped wall along the second direction is the first projection;

[0014] The portion of the pasting area located on the first section is a first pasting area, and the projection of the first pasting area along the second direction is a second projection;

[0015] The first projection and the second projection have no overlapping area, wherein the second direction is perpendicular to the first direction.

[0016] Optionally, the seal further comprises a third section;

[0017] The third section is located above the first section;

[0018] The portion of the pasting area located on the third section is the second bonding area.

[0019] Optionally, the first section and the third section are both extended along the first direction;

[0020] Two ends of the third segment in the first direction are spaced apart from the second ends of the two second segments respectively.

[0021] Optionally, the sealing member comprises foam and a vacuum bag;

[0022] The seal also has a compressed state;

[0023] In the compressed state, the foam seal is contained within the vacuum bag;

[0024] In the expanded state, the interior of the vacuum bag is in communication with the outside atmosphere;

[0025] The thickness of the foam in the expanded state is greater than the thickness of the foam in the compressed state.

[0026] Optionally, the fitting surface is arranged on the outer surface of the vacuum bag.

[0027] According to a second aspect of the present disclosure, there is provided a battery pack filling assembly, comprising at least one filling plate and the above-mentioned sealing member;

[0028] The filling plate is suitable for being sandwiched between the sealing member and the battery cell group; and / or,

[0029] The filler plate is adapted to be sandwiched between the seal and the beam of the pallet;

[0030] The pasting area is bonded to the filling plate.

[0031] Optionally, the at least one filling plate includes a first filling plate, and the first filling plate is provided with a through hole penetrating the first filling plate along a thickness direction of the filling plate;

[0032] The two ends of the through hole are suitable for respectively communicating with the glue injection space and the glue injection port.

[0033] Optionally, the at least one filling plate includes a second filling plate, and the second filling plate is a mica plate.

[0034] Optionally, the adhesive area is bonded to the filling plate via an adhesive backing.

[0035] According to a third aspect of the present disclosure, there is provided a battery pack, comprising a tray, a battery cell group and the above-mentioned battery pack filling assembly;

[0036] The pallet includes a pallet beam;

[0037] The battery cell group is arranged in the cavity of the tray;

[0038] The battery pack filling assembly is filled in the gap between the battery cell group and the beam of the tray.

[0039] Optionally, the battery pack includes a colloid located in the glue injection space.

[0040] According to a fourth aspect of the present disclosure, there is provided an electrical device, comprising a device body and the above-mentioned battery pack, wherein the battery pack is installed on the device body and is suitable for supplying power to the device body.

[0041] Through the above technical solution, the seal can be bonded to the beam of the battery cell group or the pallet through the adhesive area of ​​the fitting surface, and the unexpanded seal can be fixed between the battery cell group and the beam of the pallet, so that the seal can expand at a preset position, which can avoid displacement of the seal in the expanded state, thereby facilitating the injection of glue into the injection space, and further contributing to improving the injection efficiency.

[0042] Furthermore, since the fitting surface of the bent portion of the seal is a non-adhesive area, the restraining force of the bent portion of the seal on the bonding area during the expansion process can be reduced, which is conducive to the full expansion of the bent portion, so that the bent portion can better fit the beam of the battery cell group or the tray, and further helps to improve the sealing effect of the glue injection space and prevent the glue in the glue injection space from leaking from the bent portion.

[0043] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0045] Figure 1 is a three-dimensional schematic diagram of a battery pack provided in one embodiment of the present disclosure;

[0046] Figure 2 is a schematic top view of a battery pack provided in one embodiment of the present disclosure;

[0047] Figure 3 yes Figure 2 A partial enlarged schematic diagram of A in the middle, wherein only one filling plate is shown;

[0048] Figure 4 is an exploded schematic diagram of a battery pack filling assembly provided in one embodiment of the present disclosure;

[0049] Figure 5 yes Figure 4 A local enlarged schematic diagram of point B in the middle.

[0050] Description of Reference Numerals

[0051] 1-seal; 2-battery pack filling assembly; 3-battery pack; 11-first section; 12-second section; 13-third section; 14-bending part; 15-arc wall; 20-filling plate; 21-first filling plate; 211-through hole; 22-second filling plate; 23-adhesive backing; 30-tray; 31-bottom plate; 32-tray beam; 321-glue injection port; 33-cavity; 34-cell group; 40-fitting surface; 41-adhesive area; 411-first adhesive area; 412-second adhesive area; 42-non-adhesive area; 43-foam; 44-vacuum bag; 50-glue injection space. DETAILED DESCRIPTION

[0052] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0053] In the present disclosure, unless otherwise stated, the directional words used, such as "upper, lower, top, bottom", are usually defined by the drawing direction of the corresponding drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore cannot be understood as a limitation of the present disclosure. "Inside and outside" refer to the inside and outside of the corresponding component outline. In addition, the terms "first", "second", etc., are used to distinguish one element from another, and do not have order and importance.

[0054] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0055] like Figures 1 to 5 As shown, the present disclosure provides a seal 1, which is used to be arranged between a cell group 34 and a beam 32 of a tray of a battery pack 3 (such as a side beam or a partition beam of a tray), and the seal 1 has an expanded state. In the expanded state, the seal 1 is suitable for defining a glue injection space 50 together with the cell group 34 and the beam 32 of the tray. The seal 1 has a fitting surface 40 suitable for being arranged relative to the cell group 34 or the beam 32 of the tray, and the fitting surface 40 includes a bonding area 41 (i.e., an area where the fitting surface 40 can be bonded to the cell group 34 or the beam 32 of the tray) and a non-bonding area 42 (i.e., an area where the fitting surface 40 is not bonded to the cell group 34 or the beam 32 of the tray), the bonding area 41 is suitable for bonding to the cell group 34 or the beam 32 of the tray, and the non-bonding area 42 at least includes a bonding surface located on the bending portion 14 of the seal 1, that is, the non-bonding area 42 includes the portion of the fitting surface 40 located on the bending portion 14.

[0056] In the present disclosure, the seal 1 can be set between the battery cell group 34 and the beam 32 of the tray and expanded. The seal 1 in the expanded state can define a glue injection space 50 together with the battery cell group 34 and the beam 32 of the tray, and a colloid can be injected into the glue injection space 50. The fluidity of the colloid can be used to fully fill the glue injection space 50, thereby eliminating the gap between the beam 32 of the tray and the battery cell group 34. The supporting force provided by the solidification of the colloid can also avoid the formation of gaps between multiple battery cells in the battery cell group 34.

[0057] Furthermore, the unexpanded seal 1 can be placed between the battery cell group 34 and the beam 32 of the tray before the seal 1 is expanded. This can reduce the resistance between the battery cell group 34 and the beam 32 of the tray when the seal 1 is placed therein, and prevent the seal 1 from being scratched by friction with the battery cell group 34 or the beam 32 of the tray during the placement process, thereby preventing the colloid in the glue injection space 50 from leaking from the scratched portion of the seal 1.

[0058] In the present disclosure, the seal 1 can be bonded to the battery cell group 34 or the beam 32 of the pallet through the adhesive area 41 of the fitting surface 40, and the unexpanded seal 1 can be fixed between the battery cell group 34 and the beam 32 of the pallet, so that the seal 1 can expand at a preset position, and displacement of the seal 1 in the expanded state can be avoided, thereby facilitating the injection of glue into the glue injection space 50, which is beneficial to improving the glue injection efficiency.

[0059] Furthermore, since the fitting surface 40 of the bent portion 14 of the seal 1 is a non-adhesive area 42, the restraining force of the adhesive area on the bent portion 14 of the seal 1 during the expansion process can be reduced, thereby facilitating the full expansion of the bent portion 14, so that the bent portion 14 can better fit the battery cell group 34 or the beam 32 of the tray, thereby facilitating improving the sealing effect of the glue injection space 50 and preventing the glue in the glue injection space 50 from leaking from the bent portion 14.

[0060] It is understandable that the seal 1 of the present disclosure can directly define the glue injection space 50 together with the battery cell group 34 and the beam 32 of the tray, or it can indirectly define the glue injection space 50 together with the battery cell group 34 and the beam 32 of the tray through other structures (such as the filling plate 20 mentioned below).

[0061] That is to say, the adhesive area 41 of the present disclosure can be directly bonded to the battery cell group 34 or the beam 32 of the tray, or can be indirectly bonded to the battery cell group 34 or the beam 32 of the tray through other structures, and the present disclosure is not limited to this. As an embodiment of the present disclosure, Figure 4 As shown, according to the second aspect of the present disclosure, the present disclosure provides a battery pack filling assembly 2, which includes at least one filling plate 20 and a seal 1 provided by the present disclosure, the filling plate 20 is suitable for being clamped between the seal 1 and the battery cell group 34, and / or, the filling plate 20 can be clamped between the seal 1 and the beam 32 of the pallet, and the adhesive area 41 is bonded to the filling plate 20.

[0062] By sandwiching the filling plate 20 between the sealing member 1 and the battery cell group 34, the flat filling plate 20 can replace the battery cell group 34 to seal the sealing plate, which is beneficial to improve the sealing of the glue injection space 50. Similarly, by sandwiching the filling plate 20 between the sealing member 1 and the beam 32 of the tray, the flat filling plate 20 can replace the beam 32 of the tray to seal the sealing plate, which is beneficial to improve the sealing of the glue injection space 50.

[0063] Furthermore, when the gap between the battery cell group 34 and the beam 32 of the pallet is too large, such as when the gap between the battery cell group 34 and the beam 32 of the pallet is greater than the thickness of the seal 1 in the expanded state, a filling plate 20 can be sandwiched between the seal 1 and the beam 32 of the pallet, or a filling plate 20 can be sandwiched between the seal 1 and the beam 32 of the pallet so that the seal 1 in the expanded state can define a glue injection space 50 together with the battery cell group 34 and the beam 32 of the pallet.

[0064] Alternatively, if Figure 4 As shown, at least one filling plate 20 includes a first filling plate 21, which is suitable for being sandwiched between the sealing member 1 and the beam 32 of the pallet, and the first filling plate 21 is provided with a through hole 211 penetrating the first filling plate 21 along the thickness direction of the filling plate 20, and the two ends of the through hole 211 are suitable for respectively connecting the glue injection space 50 and the glue injection port 321. The glue injection space 50 and the glue injection port 321 are connected through the through hole 211, so that the first filling plate 21 can be arranged between the sealing member 1 and the beam 32 of the pallet without affecting the glue injection into the glue injection space 50 through the glue injection port 321.

[0065] Alternatively, if Figure 1 As shown, the glue injection port 321 can be set on the beam 32 of the pallet.

[0066] In order to facilitate the positioning of the seal 1 at a preset position between the battery cell group 34 and the beam 32 of the tray, as shown in FIG. Figure 4 As shown, at least one filling plate 20 includes a second filling plate 22, which can be a mica plate, which is beneficial to the insulation of the battery cell group 34 from the outside. In this way, the adhesive area 41 can be bonded to the second filling plate 22 to be connected to the battery cell group 34 through the second filling plate 22.

[0067] During assembly, the pasting area 41 can be bonded to the second filling plate 22 first, and then the second filling plate 22 and the seal 1 can be placed together in the gap between the battery cell group 34 and the beam 32 of the tray, that is, the pasting area 41 is connected to the battery cell group 34 through the second filling plate 22, which can facilitate the positioning of the seal 1 at a preset position between the battery cell group 34 and the beam 32 of the tray, thereby improving production efficiency.

[0068] Optionally, in an embodiment where the at least one filling panel 20 includes a first filling panel 21 , the adhesive region 41 may also be bonded to the first filling panel 21 to be connected to the beam 32 of the pallet through the first filling panel 21 .

[0069] In addition, the seal 1 of the present disclosure can be bonded to the battery cell group 34 or the beam 32 of the tray by any suitable adhesive, and the present disclosure is not limited to this. Optionally, the adhesive area 41 can be bonded to the battery cell group 34 or the beam 32 of the tray by the backing adhesive 23, and the adhesive area 41 can also be bonded to the battery cell group 34 or the beam 32 of the tray by liquid glue.

[0070] For example, in an embodiment in which the adhesive region 41 is bonded to the filling plate 20 , optionally, the adhesive region 41 may be bonded to the filling plate 20 via an adhesive backing 23 .

[0071] The seal 1 of the present disclosure may be in any suitable shape, which is not limited in the present disclosure. As an implementation example, Figure 4 and Figure 5 As shown, the seal 1 includes a first section 11 and two second sections 12, wherein the first ends of the two second sections 12 are respectively connected to the opposite ends of the first section 11, for example, the first ends of the two second sections 12 are respectively connected to the opposite ends of the first section 11 in the first direction, and there is a gap between the second ends of the two second sections 12, wherein the two second sections 12 are arranged at an angle to the first section 11, for example, referring to Figure 4 The first section 11 and the two second sections 12 shown can be constructed together into a U shape, the bending portion 14 at least includes the connecting portion of the first section 11 and the second section 12, and the fitting surface 40 on the first section 11 is provided with a bonding area 41.

[0072] Since there is a gap between the second ends of the two second sections 12, in the expanded state, the first section 11 and the two sections can together with the battery cell group 34 and the beam 32 of the tray define a glue injection space 50 with an opening located above, so that the glue injected into the glue injection space 50 can gradually fill the glue injection space 50 from bottom to top and discharge the air from the opening above the glue injection space 50.

[0073] The present disclosure does not limit the width of the first section 11 and the second section 12. Optionally, in one embodiment of the present disclosure, the width of the first section 11 is 19.9 mm to 20.1 mm, and the width of the second section 12 is 19.9 mm to 20.1 mm. Such a configuration is conducive to improving the blocking ability of the first section 11 and the second section 12 to the colloid, especially when the gap between the battery cell group 34 and the beam 32 of the tray is 3.2 mm to 7.8 mm, so that the seal 1 can well seal the glue injection space 50.

[0074] It can be understood that the width direction of the first section 11 may be the depth direction of the cavity 33 (the height direction of the battery pack), and the width direction of the second section 12 may be the length direction of the battery pack.

[0075] In the present disclosure, the first section 11 and the second section 12 can be at any suitable angle, and the present disclosure does not limit this. As an implementation mode, Figure 5 As shown, the first section 11 and the second section 12 can be arranged vertically.

[0076] As another embodiment of the present disclosure, the seal 1 includes an annular segment with an opening at the upper end and a strip segment connected to the annular segment, and the bending portion 14 includes at least a fitting surface 40 located on the annular segment, and the fitting surface 40 located on the strip segment is provided with a bonding area 41.

[0077] In order to facilitate the full expansion of the bending portion 14, as an implementation method, Figure 5 As shown, the non-adhesive region 42 also includes the bonding surface located on the second section 12, that is, the non-adhesive region 42 also includes the portion of the bonding surface 40 located on the second section 12. That is, the bonding surface 40 of the first section 11 can be bonded to the battery cell group 34 or the beam 32 of the tray, and the second section 12 can be positioned between the battery cell group 34 and the beam 32 of the tray, so that the expansion of the second section 12 is not constrained by the bonding region, which is conducive to reducing the constraint force on the connecting portion of the first section 11 and the second section 12 during the expansion process, and further facilitates the full expansion of the bending portion 14.

[0078] Alternatively, if Figure 5 As shown, the side wall of the connecting portion between the first section 11 and the second section 12 facing the glue injection space 50 can be an arc-shaped wall 15. Such a configuration is conducive to preventing the connecting portion between the first section 11 and the second section 12 from being unable to fully expand, thereby preventing the bent portion 14 of the seal 1 from being loosely fitted with the battery cell group 34 or the beam 32 of the tray, thereby preventing the colloid from leaking out of the glue injection space 50, that is, it is conducive to strengthening the sealing of the bent portion 14 by the seal 1.

[0079] In addition, the side wall of the connecting portion of the first section 11 and the second section 12 facing the glue injection space 50 is an arc-shaped wall 15, which can also make it easier to discharge the air in the connecting portion of the glue injection space 50 located at the first section 11 and the second section 12, which is conducive to the full filling of the glue in the glue injection space 50.

[0080] In the present disclosure, as an embodiment, the first ends of the two second sections 12 of the seal 1 are respectively connected to the opposite ends of the corresponding ends of the first section 11 in the first direction. In this case, the projection of the arc wall 15 along the second direction is the first projection, the portion of the sticking area 41 located on the first section 11 is the first bonding area 411, and the projection of the first bonding area 411 along the second direction is the second projection. There is no overlapping area between the first projection and the second projection, that is, there is no overlapping area between the end of the first bonding area 411 on the first section 11 and the end of the arc wall 15 on the first section 11, and the second direction can be a direction perpendicular to the first direction. In this embodiment, the first bonding area 411 can be bonded to the battery cell group 34 or the beam 32 of the tray. Since there is no overlapping area between the end of the first bonding area 411 on the first section 11 and the end of the arc wall 15 on the first section 11, the influence of the bonding on the bending portion 14 can be further reduced, thereby not only enabling the first section 11 and the two second sections 12 to be positioned at the predetermined position between the battery cell group 34 and the beam 32 of the tray, but also helping to reduce the restraining force of the bonding area 41 on the bending portion 14 during the expansion process.

[0081] Here, the first direction may be the length direction of the battery pack or the width direction of the battery pack, which is not limited in the present disclosure. As an optional implementation, Figure 1 As shown, the first direction may be the length direction of the battery pack. Figure 1 As shown, the second direction may be the height direction of the battery pack, that is, the depth direction of the cavity 33 .

[0082] Since the colloid has a certain flow rate and pressure during the injection process into the injection space 50, in order to reduce the colloid splashing out of the injection space 50 during the injection process, as an implementation method, Figure 4 and Figure 5 As shown, the seal 1 further includes a third section 13, which is located above the first section 11, and the portion of the adhesive area 41 located on the third section 13 may be a second adhesive area 412. During the process of injecting the colloid into the injection space 50, the third section 13 blocks the colloid splashing outward from the injection space 50, which not only saves the use of the colloid, but also prevents the colloid from contaminating the inside of the battery pack 3.

[0083] In order to make the colloid fill the injection space 50 more fully, as an implementation method, Figure 4 and Figure 5 As shown, the first section 11 and the third section 13 can be extended along the first direction, and the two ends of the third section 13 in the first direction are respectively spaced from the second ends of the two second sections 12. Therefore, during the glue injection process, the air in the glue injection space 50 can be discharged from the gap between the second section 12 and the third section 13, so that the glue can be filled in the glue injection space 50 more fully.

[0084] As another embodiment of the present disclosure, the first section 11 can be extended along the first direction, the third section 13 can be provided in plurality, and the plurality of third sections 13 can be arranged at intervals along the first direction, and the two outermost third sections 13 located in the first direction are respectively connected to the upper end of one second section 12. Thus, during the glue injection process, the air in the glue injection space 50 can be discharged from the intervals between the plurality of third sections 13, so that the glue can be filled in the glue injection space 50 more fully.

[0085] The present disclosure does not limit the structure of the seal 1. As an implementation method, Figure 3 As shown, the seal 1 includes foam 43 and a vacuum bag 44. The seal 1 also has a compressed state. In the compressed state, the foam 43 is sealed in the vacuum bag 44. In the expanded state, the interior of the vacuum bag 44 is connected to the outside atmosphere. The thickness of the foam 43 in the expanded state is greater than the thickness of the foam 43 in the compressed state.

[0086] Since the thickness of the foam 43 in the expanded state is greater than that in the compressed state, the compressed seal 1 is easy to be placed between the battery cell group 34 and the beam 32 of the tray, and the vacuum bag 44 of the compressed seal 1 is cut to allow air to enter the vacuum bag 44 and the foam 43, so that the foam 43 expands to define the glue injection space 50 together with the battery cell group 34 and the beam 32 of the tray, and the glue injection space 50 is well sealed.

[0087] Optionally, the thickness direction of the foam 43 may be the same as the spacing direction between the battery cell group 34 and the beam 32 of the tray.

[0088] Here, the compressed seal 1 can be made by first placing the expanded foam 43 in a vacuum bag 44, then evacuating or applying negative pressure to the vacuum bag 44 to reduce the volume of the foam 43 to a compressed state, and finally heat-pressing and sealing the vacuum bag 44. Optionally, the vacuum bag 44 can be made of a PET film.

[0089] In the present disclosure, the interior of the vacuum bag 44 can be connected to the outside atmosphere in any suitable manner. As an implementation method, the staff can cut the vacuum bag 44 covered by the first section 11 along the length direction of the first section 11, and cut the vacuum bag 44 covered by the second section 12 along the length direction of the second section 12. Similarly, in an implementation method in which the seal 1 includes the third section 13, the vacuum bag 44 covered by the third section 13 is cut along the length direction of the third section 13 to reduce the restraint force of the vacuum bag 44 on the foam 43 located at various locations of the seal 1, thereby facilitating the full expansion of the foam 43.

[0090] In other embodiments of the present disclosure, a portion of the vacuum bag 44 may be cut or slit to allow air to enter the vacuum bag 44 .

[0091] In order to facilitate bonding the compressed seal 1 to the battery cell group 34 or the beam 32 of the tray, optionally, the bonding surface 40 can be provided on the outer surface of the vacuum bag 44 .

[0092] As other embodiments of the present disclosure, the sealant 1 may also be foam glue, which may be first disposed between the battery cell group 34 and the beam 32 of the tray, and then heated so that the foam glue, the battery cell group 34 and the beam 32 of the tray jointly define a glue injection space 50.

[0093] According to a third aspect of the present disclosure, a battery pack 3 is provided, comprising a tray 30, a battery cell group 34 and the above-mentioned battery pack filling assembly 2, wherein the tray 30 comprises a tray beam 32, the battery cell group 34 is arranged in a tray cavity 33, and the battery pack filling assembly 2 is filled in a gap between the battery cell group 34 and the tray beam 32.

[0094] The beam 32 of the pallet may be a side beam of the pallet or a partition beam of the pallet, which is not limited in the present disclosure.

[0095] Optionally, the battery pack 3 includes a colloid located in the glue injection space 50 .

[0096] According to a fourth aspect of the present disclosure, there is provided an electrical device, comprising a device body and the above-mentioned battery pack 3, wherein the battery pack 3 is installed in the device body and is suitable for supplying power to the device body.

[0097] Here, the electrical equipment may be vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, electric tools, etc. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc., the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc., the electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc., the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc., and the present disclosure does not limit this.

[0098] Optionally, when the electrical device is a vehicle, the battery pack 3 may be installed on the body of the vehicle.

[0099] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0100] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0101] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A sealing member, characterized in that: The seal is used to be arranged between the battery cell group and the beam of the tray of the battery pack, and the seal has an expanded state. In the expanded state, the seal is suitable for defining a glue injection space together with the battery cell group and the beam of the tray; The sealing member has a fitting surface adapted to be arranged opposite to the battery cell group or the beam of the tray, wherein the fitting surface includes a pasting area and a non-pasting area; The adhesive area is suitable for bonding with the battery cell group or the beam of the tray; The non-adhesive area at least includes a bonding surface located on a bent portion of the sealing member.

2. The seal according to claim 1, characterized in that The sealing member comprises a first section and two second sections, wherein the first ends of the two second sections are respectively connected to the opposite ends of the first section, and there is a gap between the second ends of the two second sections, wherein the two second sections are arranged at an angle to the first section; The bending portion at least includes a connecting portion between the first section and the second section; The bonding surface located on the first section is provided with the bonding area.

3. The seal according to claim 2, characterized in that The non-adhesive area further includes a bonding surface located on the second section.

4. The seal according to claim 2, characterized in that The side wall of the connecting portion between the first section and the second section facing the glue injection space is an arc-shaped wall.

5. The seal according to claim 4, characterized in that The first ends of the two second segments are respectively connected to the two opposite ends of the first segment in the first direction, and the projection of the arc-shaped wall along the second direction is the first projection; The portion of the pasting area located on the first section is a first pasting area, and the projection of the first pasting area along the second direction is a second projection; The first projection and the second projection have no overlapping area, wherein the second direction is perpendicular to the first direction.

6. The seal according to claim 2, characterized in that The seal also includes a third section; The third section is located above the first section; The portion of the pasting area located on the third section is the second bonding area.

7. The seal according to claim 6, characterized in that The first section and the third section are both extended along the first direction; Two ends of the third segment in the first direction are spaced apart from the second ends of the two second segments respectively.

8. The sealing element according to any one of claims 1 to 7, characterized in that: The sealing member includes foam and a vacuum bag; The seal also has a compressed state; In the compressed state, the foam seal is contained within the vacuum bag; In the expanded state, the interior of the vacuum bag is in communication with the outside atmosphere; The thickness of the foam in the expanded state is greater than the thickness of the foam in the compressed state.

9. The seal according to claim 8, characterized in that The fitting surface is arranged on the outer surface of the vacuum bag.

10. A battery pack filling assembly, characterized in that: comprising at least one filling plate and a seal according to any one of claims 1 to 9; The filling plate is suitable for being sandwiched between the sealing member and the battery cell group; and / or, The filler plate is adapted to be sandwiched between the seal and the beam of the pallet; The pasting area is bonded to the filling plate.

11. The battery pack filling assembly according to claim 10, characterized in that: The at least one filling plate includes a first filling plate, and the first filling plate is provided with a through hole penetrating the first filling plate along a thickness direction of the filling plate; The two ends of the through hole are suitable for respectively communicating with the glue injection space and the glue injection port.

12. The battery pack filling assembly according to claim 10, characterized in that: The at least one filling plate includes a second filling plate, and the second filling plate is a mica plate.

13. The battery pack filling assembly according to any one of claims 10 to 12, characterized in that: The adhesive area is bonded to the filling plate via an adhesive backing.

14. A battery pack, characterized in that: Comprising a tray, a battery cell group and a battery pack filling assembly according to any one of claims 10-13; The pallet includes a pallet beam; The battery cell group is arranged in the cavity of the tray; The battery pack filling assembly is filled in the gap between the battery cell group and the beam of the tray.

15. The battery pack according to claim 14, characterized in that: The battery pack includes a colloid located in the colloid injection space.

16. An electrical equipment, characterized in that: It comprises a device body and the battery pack according to claim 14 or 15, wherein the battery pack is mounted on the device body and is suitable for supplying power to the device body.

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