Battery pack filling assembly, battery pack and electric equipment

Abstract

The utility model relates to a battery pack filling assembly, a battery pack and electric equipment, the battery pack filling assembly is suitable for being filled in a gap between a battery cell group of the battery pack and a beam of a tray, the battery pack filling assembly comprises a first shell and a second shell which are connected in an involution manner, and at least two accommodating cavities are formed between the first shell and the second shell; one of the first shell and the second shell is propped against the battery cell group, and the other one of the first shell and the second shell is propped against the beam of the tray. The battery pack filling assembly provided by the utility model has good strength, can provide good support for the battery cell group in the full life cycle of the battery cell group, and is also beneficial to reducing the cost of the battery pack.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery packs, and in particular, to 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, there must be 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 a gap between the batteries. Studies have shown that this gap will cause the capacity of the battery cell to decrease with the increase in the number of charge and discharge cycles, thereby reducing the capacity retention rate of the 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 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 object, according to a first aspect of the present disclosure, a battery pack filling assembly is provided, the battery pack filling assembly is suitable for filling the gap between the battery cell group of the battery pack and the beam of the tray, the battery pack filling assembly comprises a first shell and a second shell connected to each other;

[0005] At least two accommodating cavities are arranged between the first shell and the second shell, and the accommodating cavities are suitable for filling with colloid. One of the first shell and the second shell abuts against the battery cell group, and the other abuts against the beam of the tray.

[0006] Optionally, the at least two accommodating chambers include a first accommodating chamber and a second accommodating chamber;

[0007] The first accommodating cavity is communicated with the second accommodating cavity through a glue overflow channel.

[0008] Optionally, the battery pack filling assembly further includes a glue injection channel, the first accommodating cavity or the second accommodating cavity is suitable for communicating with the outside through the glue injection channel, and the cross-section with the smallest area among multiple cross-sections cut along the direction perpendicular to the extension of the glue injection channel on the glue injection channel is the first cross-section;

[0009] The cross section with the smallest area among the multiple cross sections on the glue overflow channel cut along the extension direction perpendicular to the glue injection channel is the second cross section, and the area of ​​the second cross section is smaller than that of the first cross section.

[0010] Optionally, the volume of the first accommodating cavity is greater than the volume of the second accommodating cavity.

[0011] Optionally, a first annular protrusion and at least one partition protrusion are provided on a side of the first shell facing the second shell, and the first annular protrusion contacts the second shell to define a cavity together with the second shell;

[0012] The at least one partition protrusion is arranged inside the cavity to separate the cavity into at least two accommodating chambers.

[0013] Optionally, a second annular convex portion is further provided on a side of the first shell facing the second shell, the second annular convex portion surrounds the first annular convex portion and is spaced apart from the first annular convex portion;

[0014] A first groove is provided on a side of the second shell facing the first shell, and the first annular protrusion and the second annular protrusion are both accommodated in the first groove.

[0015] Optionally, the battery pack filling assembly further includes a first annular seal, an inner side wall of the first annular seal is in sealing contact with an inner side wall of the first groove, and an outer side wall of the first annular seal is in sealing contact with an inner side wall of the first annular protrusion.

[0016] Optionally, the battery pack filling assembly further includes a plurality of positioning protrusions, the plurality of positioning protrusions are arranged at intervals in the accommodating cavity, and one end of the first annular seal close to the first shell is located on the plurality of positioning protrusions.

[0017] Optionally, the battery pack filling assembly further includes a second annular seal, an inner side wall of the second annular seal is in sealing contact with an outer side wall of the second annular protrusion, and an outer side wall of the second annular seal is in sealing contact with an outer side wall of the first groove.

[0018] Optionally, the battery pack filling assembly further includes a first annular seal, an inner side wall of the first annular seal is in sealing contact with an inner side wall of the first groove, an outer side wall of the first annular seal is in sealing contact with an inner side wall of the first annular protrusion, and the first annular seal is in a compressed state between the first annular protrusion and the inner side wall of the first groove; and / or,

[0019] The battery pack filling assembly also includes a second annular seal, an inner side wall of the second annular seal is in sealing contact with an outer side wall of the second annular protrusion, an outer side wall of the second annular seal is in sealing contact with an outer side wall of the first groove, and the second annular seal is in a compressed state between the second annular protrusion and the outer side wall of the first groove.

[0020] Optionally, a seal is provided at the connection between the first shell and the second shell.

[0021] Optionally, the seal comprises at least a first annular seal and a second annular seal, and the second annular seal is sleeved on the outside of the first annular seal.

[0022] Optionally, the battery pack further includes a glue injection channel passing through the first shell and the second shell, one end of the glue injection channel is suitable for communicating with the outside, the other end of the glue injection channel is connected to the accommodating cavity, and the glue injection channel is suitable for arranging a glue injection tube connected to a glue injection device.

[0023] Optionally, the battery pack filling assembly further includes a first annular seal, an inner side wall of the first annular seal is in sealing contact with an inner side wall of the first groove, and an outer side wall of the first annular seal is in sealing contact with an inner side wall of the first annular protrusion;

[0024] The battery pack filling assembly further includes a second annular seal, the inner sidewall of the second annular seal is in sealing contact with the outer sidewall of the second annular protrusion, and the outer sidewall of the second annular seal is in sealing contact with the outer sidewall of the first groove;

[0025] Through holes are provided on the outer wall of the first groove, the second annular seal, the second annular protrusion, the first annular protrusion and the first annular seal, and a plurality of the through holes are arranged correspondingly to construct a glue injection channel;

[0026] One end of the glue injection channel is suitable for communicating with the outside, and the other end of the glue injection channel is communicated with the accommodating cavity. The glue injection channel is suitable for arranging a glue injection tube connected to a glue injection device.

[0027] Optionally, a first protrusion extending toward the second shell is provided on a side of the first shell facing the second shell, and a position of the first protrusion corresponds to a position of the accommodating cavity; and / or,

[0028] A second protrusion extending toward the first shell is provided on a side of the second shell facing the first shell, and the position of the second protrusion corresponds to the position of the accommodating cavity.

[0029] Optionally, a concave cavity is provided on the side of the first shell facing the second shell, and a second protrusion extending toward the first shell is provided on the side of the second shell facing the first shell, and the second protrusion covers the opening of the concave cavity to form the accommodating cavity between the first shell and the second shell.

[0030] Optionally, at least one second groove is provided on a side of the second shell facing away from the first shell, and on the second shell, a position of the second groove corresponds to a position of the second protrusion.

[0031] Optionally, the battery pack filling assembly further includes a colloid, and the colloid is contained in the containing cavity.

[0032] Optionally, the first shell and the second shell are movably connected along a mating direction of the first shell and the second shell.

[0033] According to a second 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;

[0034] The battery cell group is arranged in the cavity of the tray;

[0035] The battery pack filling assembly is filled in the gap between the battery cell group and the beam of the tray.

[0036] According to a third 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.

[0037] Through the above technical solution, the battery pack filling component can be filled in the gap between the battery cell group and the tray of the battery pack. By injecting a preset amount of colloid into the accommodating cavity, the colloid can fill the accommodating cavity and expand the volume of the accommodating cavity, so that one of the first shell and the second shell abuts the battery cell group, and the other abuts the tray, so as to fill the gap between the tray and the battery cell group. That is, through the pre-tightening force provided by the colloid, the first shell can abut against one of the beams of the battery cell group and the tray, and the second shell can abut against the other of the beams of the battery cell group and the tray. Because the colloid has fluidity, the colloid can evenly fill one or more of the at least two cavities, which is beneficial to ensure that the battery pack filling component has good strength on the one hand, and is beneficial to uniform force at various locations where the battery cell group abuts against the first shell or the second shell on the other hand. On the other hand, because the colloid can maintain good strength for a long time after solidification, the battery pack filling component can provide good support for the battery cell group throughout its life cycle.

[0038] Furthermore, since at least two accommodating cavities are provided between the first shell and the second shell, the number and volume of the accommodating cavities can be designed according to demand. While ensuring the supporting capacity of the battery pack filling assembly for the battery cell group, the colloid required to fill all the accommodating cavities can be reduced, thereby helping to save the use of colloid and reduce the cost of the battery pack filling assembly.

[0039] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] 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:

[0041] Figure 1 is a schematic diagram of a three-dimensional structure of a battery pack provided in one embodiment of the present disclosure;

[0042] Figure 2 is a schematic diagram of the three-dimensional structure of a battery pack filling assembly provided in one embodiment of the present disclosure, wherein a glue injection tube is also shown;

[0043] Figure 3 is an exploded schematic diagram of a battery pack filling assembly provided by an embodiment of the present disclosure, wherein a glue injection tube is also shown;

[0044] Figure 4 is a schematic top view of a first shell of a battery pack filling assembly provided in an embodiment of the present disclosure, showing a side of the first shell facing the second shell, wherein a glue injection tube is also shown;

[0045] Figure 5 is a schematic diagram of the three-dimensional structure of a second shell of a battery pack filling assembly provided in an embodiment of the present disclosure, wherein the second shell is shown facing the side of the first shell;

[0046] Figure 6 is a schematic diagram of a three-dimensional structure of a battery pack filling assembly provided in an embodiment of the present disclosure, wherein the first shell is not shown and a glue injection tube is shown;

[0047] Figure 7 is a partial cross-sectional schematic diagram of a battery pack filling assembly provided by an embodiment of the present disclosure, wherein a glue injection tube is also shown;

[0048] Figure 8 yes Figure 7 A local enlarged schematic diagram of point A in the middle.

[0049] Description of Reference Numerals

[0050] 1-battery pack filling assembly; 2-battery pack; 3-cell group; 4-tray; 5-gap; 11-first shell; 111-first annular protrusion; 112-second annular protrusion; 113-partitioning protrusion; 114-concave cavity; 12-second shell; 121-first groove; 122-second protrusion; 123-second groove; 20-accommodating cavity; 21-first accommodating cavity; 22-second accommodating cavity; 30-seal; 31-first annular seal; 32-second annular seal; 40-glue injection channel; 41-glue injection tube; 50-glue overflow channel; 60-positioning protrusion; 70-colloid. DETAILED DESCRIPTION

[0051] 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.

[0052] 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.

[0053] 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.

[0054] As mentioned above, the filling effect of the gap in the related art is not ideal.

[0055] In view of this, if Figures 1 to 8As shown, according to the first aspect of the present disclosure, a battery pack filling assembly 1 is provided, and the battery pack filling assembly 1 is suitable for filling in the gap 5 between the battery cell group 3 of the battery pack 2 and the beam of the tray 4 (such as the side beam of the tray 4 and / or the middle beam of the tray 4), and the battery pack filling assembly 1 includes a first shell 11 and a second shell 12 connected to each other, and at least two accommodating cavities 20 are arranged between the first shell 11 and the second shell 12, and the accommodating cavity 20 is suitable for filling the colloid 70, and one of the first shell 11 and the second shell 12 abuts against the battery cell group 3, and the other abuts against the beam of the tray 4, that is, one of the first shell 11 and the second shell 12 is suitable for abutting against the battery cell group 3 under the action of the colloid 70, and the other is suitable for abutting against the beam of the tray 4 under the action of the colloid 70.

[0056] Through the above technical solution, the battery pack filling assembly 1 can be filled in the gap 5 between the cell group 3 of the battery pack 2 and the beam of the tray 4. By injecting a preset amount of colloid 70 into the accommodating cavity 20, the colloid 70 can fill the accommodating cavity 20 and expand the volume of the accommodating cavity 20, so that one of the first shell 11 and the second shell 12 can abut against the cell group 3, and the other can abut against the tray 4, thereby filling the gap 5 between the tray 4 and the cell group 3. That is, through the pre-tightening force provided by the colloid 70, the first shell 11 can abut against one of the cell group 3 and the beam of the tray 4, and the second shell 12 can abut against the other of the cell group 3 and the beam of the tray 4. Because the colloid 70 is fluid, the colloid 70 can evenly fill one or more of the at least two cavities, which is beneficial to ensure that the battery pack filling component 1 has good strength on the one hand, and is beneficial to uniform force at various locations where the battery cell group 3 and the first shell 11 or the second shell abut against each other on the other hand. On the other hand, since the colloid 70 can maintain good strength for a long time after solidification, the battery pack filling component 1 can provide good support for the battery cell group 3 throughout its entire life cycle.

[0057] Furthermore, since at least two accommodating cavities 20 are provided between the first shell 11 and the second shell 12, the number and volume of the accommodating cavities 20 can be designed according to demand. While ensuring the supporting capacity of the battery pack filling assembly 1 for the battery cell group 3, the colloid 70 required to fill all the accommodating cavities 20 can be reduced, thereby helping to save the use of the colloid 70 and reduce the cost of the battery pack filling assembly 1.

[0058] In addition, since there are at least two accommodating cavities 20, a partition structure can be set on the first shell 11 and / or the second shell 12 (such as setting a partition protrusion 113 on the side of the first shell 11 facing the second shell 12), so that at least two accommodating cavities 20 can be defined between the first shell 11 and the second shell 12, which is beneficial to increase the strength of the first shell 11 and / or the second shell 12, and further beneficial to increase the overall strength of the battery pack filling assembly 1, so that the battery pack filling assembly 1 can better support the battery cell group 3.

[0059] Optionally, the material of the first shell 11 and the second shell 12 can be one or more insulating materials such as ceramic, SMC, PP, PVC, epoxy, ABC, etc., which is not limited in the present disclosure.

[0060] In order to prevent the colloid 70 from overflowing to the outside of the battery pack filling assembly 1 and affecting the normal operation of the battery pack 2, in one embodiment of the present disclosure, a seal 30 may be provided at the connection between the first shell 11 and the second shell 12. The present disclosure does not limit the material of the seal 30, and the material of the seal 30 may include but is not limited to sealing foam.

[0061] It is understandable that in other embodiments of the present disclosure, the above-mentioned seal 30 may not be provided, and the first shell 11 and the second shell 12 may be directly sealed together to prevent the colloid 70 from flowing to the outside of the battery pack filling assembly 1.

[0062] The present disclosure does not limit how the first shell 11 and the second shell 12 can achieve the abutment against the beams of the battery cell group 3 and the tray 4. As an embodiment, the first shell 11 and the second shell 12 can be movably connected along the mating direction of the first shell 11 and the second shell 12, that is, the first shell 11 and the second shell 12 are movably connected along the width direction of the gap 5, so that as the colloid 70 is injected into the accommodating cavity 20, the first shell 11 and the second shell 12 can move opposite to each other along the mating direction of the first shell 11 and the second shell 12, thereby achieving the abutment against the beams of the battery cell group 3 and the tray 4.

[0063] As other embodiments of the present disclosure, the first shell 11 and the second shell 12 can be deformable shells, so that as the colloid 70 is injected into the accommodating cavity 20, the first shell 11 and the second shell 12 are deformed to protrude toward the beams of the battery cell group 3 and the tray 4, thereby achieving resistance against the beams of the battery cell group 3 and the tray 4.

[0064] The present disclosure does not limit the number of the accommodating chambers 20. As an implementation method, Figure 4As shown, at least two accommodating chambers 20 may include a first accommodating chamber 21 and a second accommodating chamber 22, and the first accommodating chamber 21 and the second accommodating chamber 22 may be connected via a glue overflow channel 50. Since the colloid 70 can flow between the first accommodating chamber 21 and the second accommodating chamber 22 via the glue overflow channel 50, only one of the first accommodating chamber 21 and the second accommodating chamber 22 needs to be injected with glue to complete the injection of the other of the first accommodating chamber 21 and the second accommodating chamber 22, thereby facilitating the improvement of the glue injection efficiency.

[0065] In addition, in the embodiment where only the colloid 70 in one of the first accommodating cavity 21 and the second accommodating cavity 22 needs to support the first shell 11 and the second shell 12, a certain amount of colloid 70 can be injected into one of the first accommodating cavity 21 and the second accommodating cavity 22 so that a certain pressure is reached in the accommodating cavity 20. Since the pressure in the other accommodating cavity 20 is lower, the colloid 70 can automatically overflow into the accommodating cavity 20 with lower pressure through the overflow passage 50 until the pressure in the two accommodating cavities 20 reaches equilibrium, that is, the accommodating cavity 20 to be injected with glue can be fully filled with the colloid 70, and the excess colloid 70 can be accommodated in the other accommodating cavity 20. Therefore, when injecting glue into the battery pack filling assembly 1 in each battery pack 2, it is no longer necessary to measure the gap 5 of each battery pack 2 to confirm the amount of glue injected, which is beneficial to improve the installation efficiency of the battery pack filling assembly 1 in the tray 4.

[0066] like Figure 4 As shown, the battery pack filling assembly 1 may further include a glue injection channel 40, and the first accommodating cavity 21 or the second accommodating cavity 22 is suitable for communicating with the outside through the glue injection channel 40. The cross-section with the smallest area among multiple cross-sections cut along the direction perpendicular to the extension direction of the glue injection channel 40 on the glue injection channel 40 is the first cross-section, and the cross-section with the smallest area among multiple cross-sections cut along the direction perpendicular to the extension direction of the glue injection channel 40 on the glue overflow channel 50 is the second cross-section, and the area of ​​the second cross-section is smaller than that of the first cross-section.

[0067] Since the area of ​​the second cross-section is smaller than that of the first cross-section, the speed at which the colloid 70 flows through the glue injection channel 40 into the first accommodating cavity 21 and the second accommodating cavity 22 connected to the glue injection channel 40 can be greater than the speed at which the colloid 70 flows between the first accommodating cavity 21 and the second accommodating cavity 22 through the glue overflow channel 50, thereby enabling the colloid 70 to be fully filled in the first accommodating cavity 21 and the second accommodating cavity 22 connected to the glue injection channel 40, thereby facilitating improving the ability of the battery pack filling assembly 1 to withstand the impact of the battery cell group 3.

[0068] The first cross section and the second cross section may be of any shape, such as a circular cross section, a rectangular cross section, etc., and the present disclosure does not limit this.

[0069] The first accommodating cavity 21 and the second accommodating cavity 22 of the present disclosure can be designed to any suitable volume according to practical applications, and the present disclosure does not limit this. As an embodiment, the volume of the first accommodating cavity 21 can be larger than the volume of the second accommodating cavity 22. That is, the space occupied by the second accommodating cavity 22 can be smaller. When the second accommodating cavity 22 is used to accommodate the overflowed colloid 70, it is beneficial for the battery pack filling assembly 1 to have a more compact shape.

[0070] In order to define at least two accommodating chambers 20 between the first shell 11 and the second shell 12, as an embodiment of the present disclosure, Figure 3 , Figure 4 as well as Figure 5 As shown, a first annular protrusion 111 and at least one partition protrusion 113 are provided on the side of the first shell 11 facing the second shell 12. The first annular protrusion 111 contacts the second shell 12 to define a cavity together with the second shell 12. At least one partition protrusion 113 is arranged inside the cavity to separate the cavity into at least two accommodating chambers 20.

[0071] As another embodiment of the present disclosure, at least two annular protrusions may be provided on one side of the first shell 11 facing the second shell 12, and the at least two annular protrusions are in contact with the second shell 12 to define at least two accommodating chambers 20 together with the second shell 12. In addition, the partition protrusion 113 may function as a reinforcing rib, so that the first shell 11 has a higher structural strength.

[0072] like Figure 3 , Figure 4 as well as Figure 5 As shown, a second annular protrusion 112 may be further provided on the side of the first shell 11 facing the second shell 12, the second annular protrusion 112 surrounds the first annular protrusion 111, and is arranged at intervals with the first annular protrusion 111, and a first groove 121 is provided on the side of the second shell 12 facing the first shell 11, and both the first annular protrusion 111 and the second annular protrusion 112 are accommodated in the first groove 121. The first annular protrusion 111 and the second annular protrusion 112 are located in the first groove 121, so that a larger sealing area can be provided between the first shell 11 and the second shell 12 (i.e., between the first annular protrusion 111 and the groove wall of the first groove 121, and between the second annular protrusion 112 and the groove wall of the second groove 123), which is conducive to good sealing between the first shell 11 and the second shell 12.

[0073] Furthermore, since the first annular protrusion 111 and the second annular protrusion 112 are arranged at intervals, the first annular protrusion 111 and the second annular protrusion 112 can accommodate the colloid 70 leaking from between the first annular protrusion 111 and the groove wall of the first groove 121, which helps to reduce the leakage of the colloid 70 outside the battery pack filling assembly 1.

[0074] Optionally, the sealing area between the second annular protrusion 112 and the first groove 121 can be larger than the sealing area between the first annular protrusion and the first groove 121 (i.e., the height of the first annular protrusion 111 can be smaller than the height of the second annular protrusion 112), so that the sealing ability of the battery pack filling assembly 1 for the colloid 70 increases gradually from the accommodating cavity 20 to the outside. While ensuring that the battery pack filling assembly 1 has sufficient sealing ability for the colloid 70, it saves the material required for molding the first annular protrusion and can also reduce the weight of the battery pack filling assembly 1.

[0075] In order to improve the sealing effect between the first groove 121 and the first annular protrusion 111, as an implementation method, Figure 3 , Figure 6 and Figure 8 As shown, the battery pack filling assembly 1 may include a first annular seal 31, that is, the seal 30 may include a first annular seal 31, the inner wall of the first annular seal 31 is in sealing contact with the inner wall of the first groove 121, and the outer wall of the first annular seal 31 is in sealing contact with the inner wall of the first annular protrusion 111.

[0076] By providing the first annular seal 31, the gap between the inner wall of the first groove 121 and the inner wall of the first annular protrusion 111 can be eliminated, thereby improving the sealing effect between the first groove 121 and the first annular protrusion 111, which is beneficial to improving the sealing effect between the first shell 11 and the second shell 12.

[0077] It should be noted that the “inside and outside” mentioned above are defined by the inside and outside of the outline of the battery pack filling component 1, that is, Figure 7 and Figure 8 As shown, the inner side wall of the first annular seal 31 is the side wall of the first annular seal 31 close to the accommodating cavity 20, the outer side wall of the first annular seal 31 is the side wall of the first annular seal 31 away from the accommodating cavity 20, the inner side wall of the first groove 121 is the side wall of the first groove 121 close to the accommodating cavity 20, and the inner side wall of the first annular protrusion 111 is the side wall of the first annular protrusion 111 close to the accommodating cavity 20.

[0078] Alternatively, if Figure 3 , Figure 4 and Figure 8 As shown, the battery pack filling assembly 1 also includes a plurality of positioning protrusions 60 , which are arranged at intervals in the accommodating cavity 20 , and one end of the first annular seal 31 close to the first shell 11 is located on the plurality of positioning protrusions 60 .

[0079] Since there must be a gap between the cavity wall of the accommodating cavity 20 close to the first shell 11 and the cavity wall of the accommodating cavity 20 close to the second shell 12, in other words, if the first annular seal 31 contacts the cavity wall of the accommodating cavity 20 close to the first shell 11, there will be a portion of the first annular seal that is not in contact with the inner wall of the first groove 121. Therefore, by providing a suitable gap between the first annular seal 31 and the first shell 11 through a plurality of positioning protrusions 60, the portion of the first annular seal 31 that is not in contact with the inner wall of the first groove 121 can be reduced, thereby saving the use of the first annular seal 31 while ensuring the sealing effect of the first annular seal 31, which is beneficial to reducing the cost of the battery pack filling assembly 1. In addition, the plurality of positioning protrusions 60 are arranged at intervals, which is beneficial to reducing the weight and cost of the battery pack filling assembly 1.

[0080] In order to improve the sealing effect between the first groove 121 and the second annular protrusion 112, as an implementation method, Figure 3 , Figure 4 and Figure 8 As shown, the battery pack filling assembly 1 may include a second annular seal 32, that is, the seal 30 may include a second annular seal 32, the inner wall of the second annular seal 32 is in sealing contact with the outer wall of the second annular protrusion 112, and the outer wall of the second annular seal 32 is in sealing contact with the outer wall of the first groove 121.

[0081] By providing the second annular seal 32, the gap between the outer wall of the first groove 121 and the outer wall of the first annular protrusion 111 can be eliminated, thereby improving the sealing effect between the first groove 121 and the second annular protrusion 112, which is beneficial to improving the sealing effect between the first shell 11 and the second shell 12.

[0082] It can be understood that the “inside” and “outside” mentioned above are defined by the inside and outside of the contour of the battery pack filling assembly 1, that is, the inner wall of the second annular seal 32 is the side wall of the second annular seal 32 close to the accommodating cavity 20, the outer wall of the second annular seal 32 is the side wall of the second annular seal 32 away from the accommodating cavity 20, the outer wall of the first groove 121 is the side wall of the first groove 121 away from the accommodating cavity 20, and the outer wall of the second annular protrusion 112 is the side wall of the first annular protrusion 111 away from the accommodating cavity 20.

[0083] As mentioned above, if Figure 3 , Figure 4 and Figure 8As shown, the seal 30 may include at least a first annular seal 31 and a second annular seal 32. The second annular seal 32 is sleeved on the outside of the first annular seal 31, so that the seal 30 has more sealing positions. For example, if the colloid 70 leaks from the sealing position of the first annular seal 31, the second annular seal 32 can also seal the colloid 70.

[0084] In order to further improve the sealing effect between the first shell 11 and the second shell 12, as an implementation method, Figure 3 , Figure 4 and Figure 8 As shown, the inner wall of the first annular seal 31 is in sealing contact with the inner wall of the first groove 121, the outer wall of the first annular seal 31 is in sealing contact with the inner wall of the first annular protrusion 111, and the first annular seal 31 is in a compressed state between the first annular protrusion 111 and the inner wall of the first groove 121, and / or the inner wall of the second annular seal 32 is in sealing contact with the outer wall of the second annular protrusion 112, the outer wall of the second annular seal 32 is in sealing contact with the outer wall of the first groove 121, and the second annular seal 32 is in a compressed state between the second annular protrusion 112 and the outer wall of the first groove 121.

[0085] The first annular seal 31 is in a compressed state between the inner wall of the first annular protrusion 111 and the inner wall of the first groove 121, which can make the sealing contact between the first annular seal 31 and the inner wall of the first groove 121 and the inner wall of the first annular protrusion 111 tighter, thereby further improving the sealing effect between the first shell 11 and the second shell 12.

[0086] Similarly, the second annular seal 32 is in a compressed state between the outer wall of the second annular protrusion 112 and the outer wall of the first groove 121, which can make the sealing contact between the second annular seal 32 and the outer wall of the first groove 121 and the outer wall of the second annular protrusion 112 tighter, thereby further improving the sealing effect between the first shell 11 and the second shell 12.

[0087] Alternatively, see Figure 8 , the width (first width) of the first annular seal 31 in the non-compressed state should be greater than the width (second width) of the reserved assembly gap between the second annular protrusion 112 and the outer side wall of the first groove 121. Optionally, the difference between the first width and the second width is greater than 0.2 mm. In other words, the difference between the thickness of the first annular seal 31 in the compressed state and the thickness of the first annular seal 31 in the non-compressed state is greater than 0.2 mm.

[0088] Optionally, the width (third width) of the second annular seal 32 in the non-compressed state is

[0089] The width of the reserved assembly gap between the outer wall of the second annular protrusion 112 and the outer wall of the first groove 121 (the fourth width), the difference between the third width and the fourth width may also be greater than 0.2 mm. In other words, the difference between the thickness of the second annular seal 32 in the compressed state and the thickness of the second annular seal 32 in the non-compressed state is greater than 0.2 mm.

[0090] In this disclosure, Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the battery pack 2 also includes a glue injection channel 40 passing through the first shell 11 and the second shell 12. One end of the glue injection channel 40 is suitable for communicating with the outside world, and the other end of the glue injection channel 40 is connected to the accommodating chamber 20. The glue injection channel 40 is suitable for arranging a glue injection tube 41 connected to the glue injection equipment. When injecting glue into the accommodating chamber 20, the glue injection tube 41 can be arranged in the glue injection channel 40, so that the inlet of the glue injection tube 41 is suitable for communicating with the outside world, and the outlet of the glue injection tube 41 is connected to the accommodating chamber 20. In this way, the accommodating chamber 20 can be injected with glue through the glue injection tube 41. After the glue injection into the accommodating chamber 20 is completed, the glue injection tube 41 can be taken out of the glue injection channel 40 to prevent the glue injection tube 41 from occupying the space in the tray 4. Using the glue injection tube 41 for glue injection is convenient for connecting with the glue injection nozzle of the glue injection equipment. At the same time, it is also convenient to directly inject the colloid 70 into the accommodating chamber 20.

[0091] It is understandable that in other embodiments of the present disclosure, the glue injection channel 40 may not be used to arrange the above-mentioned glue injection tube 41 , and during glue injection, the glue injection nozzle of the glue injection device may be directly inserted into the glue injection channel 40 .

[0092] In the present disclosure, the injection channel 40 can be set at any suitable position, and the present disclosure does not limit this. As an implementation method, Figure 6 As shown, the inner wall of the first annular seal 31 is in sealing contact with the inner wall of the first groove 121, the outer wall of the first annular seal 31 is in sealing contact with the inner wall of the first annular protrusion 111, the inner wall of the second annular seal 32 is in sealing contact with the outer wall of the second annular protrusion 112, the outer wall of the second annular seal 32 is in sealing contact with the outer wall of the first groove 121, the outer wall of the first groove 121, the second annular seal 32, the second annular protrusion 112, the first annular protrusion 111 and the first annular seal 31 are all provided with through holes, and a plurality of through holes are arranged correspondingly to construct the above-mentioned glue injection channel 40. Here, it can be understood that a plurality of through holes are arranged correspondingly to construct the above-mentioned glue injection channel 40 can refer to that the glue injection channel 40 as a whole can be constructed by the above-mentioned multiple through holes, and it can also refer to that a part of the glue injection channel 40 can be constructed by the above-mentioned multiple through holes.

[0093] One end of the glue injection channel 40 is suitable for communicating with the outside, and the other end of the glue injection channel 40 is connected to the accommodating chamber 20. The glue injection channel 40 is suitable for arranging the above-mentioned glue injection tube 41 for connecting with the glue injection equipment. When injecting glue into the accommodating chamber 20, one end of the glue injection tube 41 can be sequentially passed through the through hole of the outer wall of the first groove 121, the through hole of the second annular seal 32, the through hole of the second annular protrusion 112, the through hole of the first annular protrusion 111 and the through hole of the first annular seal 31, and is located in the accommodating chamber 20. In this way, as mentioned above, the accommodating chamber 20 can be injected with glue through the glue injection tube 41.

[0094] Since the glue injection tube 41 is sequentially inserted into the outer wall of the first groove 121, the second annular seal 32, the second annular protrusion 112, the first annular protrusion 111 and the first annular seal 31, the inlet of the glue injection channel 40 can be located at the outer wall of the second shell 12 close to the first groove 121. In other words, when the battery pack filling assembly 1 is filled in the gap 5, the inlet of the glue injection channel 40 can be located at the open position of the battery pack filling assembly 1 facing the tray 4, which facilitates the glue injection operation.

[0095] Optionally, the outer diameter of the glue injection tube 41 is greater than the inner diameter of the first annular seal 31 where the glue injection tube 41 passes through by at least 0.2 mm.

[0096] Optionally, the outer diameter of the glue injection tube 41 is greater than the inner diameter of the second annular seal 32 at a point where the glue injection tube 41 passes through by at least 0.2 mm.

[0097] In order to save the use of colloid 70, as an implementation method, Figure 5 , Figure 7 and Figure 8 As shown, a first protrusion extending toward the second shell 12 is provided on the side of the first shell 11 facing the second shell 12, and the position of the first protrusion corresponds to the position of the accommodating cavity 20, and / or a second protrusion 122 extending toward the first shell 11 is provided on the side of the second shell 12 facing the first shell 11, and the position of the second protrusion 122 corresponds to the position of the accommodating cavity 20.

[0098] Since the position of the first protrusion corresponds to the position of the accommodating cavity 20, the first protrusion can be located in the accommodating cavity 20, thereby reducing the volume of the accommodating cavity 20 that can accommodate the colloid 70, and thus less colloid 70 can be used to achieve the first shell 11 and the second shell 12 to support the beams of the battery cell group 3 and the tray 4.

[0099] Similarly, since the position of the second protrusion 122 corresponds to the position of the accommodating cavity 20, the second protrusion 122 can be located in the accommodating cavity 20, thereby reducing the volume of the colloid 70 that can be accommodated in the accommodating cavity 20, and thus less colloid 70 can be used to achieve the first shell 11 and the second shell 12 to support the beams of the battery cell group 3 and the tray 4.

[0100] The present disclosure does not limit the formation method of the accommodation cavity 20. As an implementation method, Figure 3 As shown, a concave cavity 114 is provided on the side of the first shell 11 facing the second shell 12, and a second protrusion 122 extending toward the first shell 11 is provided on the side of the second shell 12 facing the first shell 11. The second protrusion 122 covers the opening of the concave cavity 114 so that a accommodating cavity 20 can be formed between the first shell 11 and the second shell 12.

[0101] As other embodiments of the present disclosure, a concave cavity 114 is provided on the side of the second shell 12 facing the first shell 11, and a third protrusion extending toward the second shell 12 is provided on the side of the first shell 11 facing the second shell 12, and the third protrusion covers the opening of the concave cavity 114 so that a accommodating cavity 20 can be formed between the first shell 11 and the second shell 12.

[0102] As an optional implementation of the present disclosure, Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, at least one second groove 123 is provided on the side of the second shell 12 facing away from the first shell 11, and the position of the second groove 123 on the second shell 12 corresponds to the position of the second protrusion 122. Since the position of the second groove 123 corresponds to the position of the second protrusion 122, by providing the second groove 123, not only can the material of the second shell 12 be saved, but also the weight of the second shell 12 can be reduced, which is conducive to reducing the cost and weight of the battery pack filling assembly 1.

[0103] In the present disclosure, optionally, the battery pack filling assembly 1 further includes a colloid 70, and the colloid 70 is contained in the containing cavity 20. Here, optionally, the colloid 70 can be one or more of a foaming glue, a structural glue, and a thermally conductive glue, which is not limited in the present disclosure.

[0104] According to a second aspect of the present disclosure, a battery pack 2 is provided, comprising a tray 4, a battery cell group 3 and the above-mentioned battery pack filling assembly 1, wherein the battery cell group 3 is arranged in a cavity of the tray 4, and the battery pack filling assembly 1 is filled in a gap 5 between the battery cell group 3 and the beam of the tray 4.

[0105] According to a third aspect of the present disclosure, there is provided an electrical device, comprising a device body and the above-mentioned battery pack 2, wherein the battery pack 2 is installed in the device body and is suitable for supplying power to the device body.

[0106] 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.

[0107] Optionally, when the electrical device is a vehicle, the battery pack 2 may be installed on the body of the vehicle.

[0108] 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.

[0109] 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.

[0110] 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 battery pack filling assembly, characterized in that: The battery pack filling assembly is suitable for filling the gap between the battery cell group of the battery pack and the beam of the tray, and the battery pack filling assembly includes a first shell and a second shell connected to each other; At least two accommodating cavities are arranged between the first shell and the second shell, and the accommodating cavities are suitable for filling with colloid. One of the first shell and the second shell abuts against the battery cell group, and the other abuts against the beam of the tray.

2. The battery pack filling assembly according to claim 1, characterized in that: The at least two accommodating chambers include a first accommodating chamber and a second accommodating chamber; The first accommodating cavity is communicated with the second accommodating cavity through a glue overflow channel.

3. The battery pack filling assembly according to claim 2, characterized in that: The battery pack filling assembly further includes a glue injection channel, the first accommodating cavity or the second accommodating cavity is suitable for communicating with the outside through the glue injection channel, and the first cross section with the smallest area among multiple cross sections cut along the direction perpendicular to the extension of the glue injection channel is the first cross section; The cross section with the smallest area among the multiple cross sections on the glue overflow channel cut along the extension direction perpendicular to the glue injection channel is the second cross section, and the area of ​​the second cross section is smaller than that of the first cross section.

4. The battery pack filling assembly according to claim 2, characterized in that: The volume of the first accommodating cavity is greater than the volume of the second accommodating cavity.

5. The battery pack filling assembly according to claim 1, characterized in that: A first annular protrusion and at least one partition protrusion are provided on a side of the first shell facing the second shell, and the first annular protrusion contacts the second shell to define a cavity together with the second shell; The at least one partition protrusion is arranged inside the cavity to separate the cavity into at least two accommodating chambers.

6. The battery pack filling assembly according to claim 5, characterized in that: A second annular convex portion is further provided on a side of the first shell facing the second shell, the second annular convex portion surrounds the first annular convex portion and is spaced apart from the first annular convex portion; A first groove is provided on a side of the second shell facing the first shell, and the first annular protrusion and the second annular protrusion are both accommodated in the first groove.

7. The battery pack filling assembly according to claim 6, characterized in that: The battery pack filling assembly also includes a first annular seal, an inner side wall of the first annular seal is in sealing contact with an inner side wall of the first groove, and an outer side wall of the first annular seal is in sealing contact with an inner side wall of the first annular protrusion.

8. The battery pack filling assembly according to claim 7, characterized in that: The battery pack filling assembly also includes a plurality of positioning protrusions, which are arranged at intervals in the accommodating cavity, and one end of the first annular seal close to the first shell is located on the plurality of positioning protrusions.

9. The battery pack filling assembly according to claim 6, characterized in that: The battery pack filling assembly also includes a second annular seal, an inner side wall of the second annular seal is in sealing contact with an outer side wall of the second annular protrusion, and an outer side wall of the second annular seal is in sealing contact with an outer side wall of the first groove.

10. The battery pack filling assembly according to claim 6, characterized in that: The battery pack filling assembly further includes a first annular seal, wherein an inner sidewall of the first annular seal is in sealing contact with an inner sidewall of the first groove, an outer sidewall of the first annular seal is in sealing contact with an inner sidewall of the first annular protrusion, and the first annular seal is in a compressed state between the first annular protrusion and the inner sidewall of the first groove; and / or, The battery pack filling assembly also includes a second annular seal, an inner side wall of the second annular seal is in sealing contact with an outer side wall of the second annular protrusion, an outer side wall of the second annular seal is in sealing contact with an outer side wall of the first groove, and the second annular seal is in a compressed state between the second annular protrusion and the outer side wall of the first groove.

11. The battery pack filling assembly according to claim 1, characterized in that: A sealing member is provided at the connection between the first shell and the second shell.

12. The battery pack filling assembly according to claim 11, characterized in that: The sealing member at least comprises a first annular sealing member and a second annular sealing member, wherein the second annular sealing member is sleeved on the outer side of the first annular sealing member.

13. The battery pack filling assembly according to claim 1, characterized in that: The battery pack also includes a glue injection channel passing through the first shell and the second shell, one end of the glue injection channel is suitable for communicating with the outside, the other end of the glue injection channel is connected to the accommodating cavity, and the glue injection channel is suitable for arranging a glue injection tube connected to a glue injection device.

14. The battery pack filling assembly according to claim 6, characterized in that: The battery pack filling assembly further includes a first annular seal, wherein an inner sidewall of the first annular seal is in sealing contact with an inner sidewall of the first groove, and an outer sidewall of the first annular seal is in sealing contact with an inner sidewall of the first annular protrusion; The battery pack filling assembly further includes a second annular seal, the inner sidewall of the second annular seal is in sealing contact with the outer sidewall of the second annular protrusion, and the outer sidewall of the second annular seal is in sealing contact with the outer sidewall of the first groove; Through holes are provided on the outer wall of the first groove, the second annular seal, the second annular protrusion, the first annular protrusion and the first annular seal, and a plurality of the through holes are arranged correspondingly to construct a glue injection channel; One end of the glue injection channel is suitable for communicating with the outside, and the other end of the glue injection channel is communicated with the accommodating cavity. The glue injection channel is suitable for arranging a glue injection tube connected to a glue injection device.

15. The battery pack filling assembly according to any one of claims 1 to 14, characterized in that: A first protrusion extending toward the second shell is disposed on a side of the first shell facing the second shell, and a position of the first protrusion corresponds to a position of the accommodating cavity; and / or, A second protrusion extending toward the first shell is provided on a side of the second shell facing the first shell, and the position of the second protrusion corresponds to the position of the accommodating cavity.

16. The battery pack filling assembly according to claim 15, characterized in that: A concave cavity is provided on the side of the first shell facing the second shell, and a second protrusion extending toward the first shell is provided on the side of the second shell facing the first shell. The second protrusion covers the opening of the concave cavity to form the accommodating cavity between the first shell and the second shell.

17. The battery pack filling assembly according to claim 15, characterized in that: At least one second groove is provided on a side of the second shell facing away from the first shell. On the second shell, the position of the second groove corresponds to the position of the second protrusion.

18. The battery pack filling assembly according to any one of claims 1 to 14, characterized in that: The battery pack filling assembly also includes a colloid, and the colloid is contained in the containing cavity.

19. The battery pack filling assembly according to any one of claims 1 to 14, characterized in that: The first shell and the second shell are movably connected along a mating direction of the first shell and the second shell.

20. 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 1 to 19; 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.

21. An electrical equipment, characterized in that: It comprises a device body and the battery pack according to claim 20, wherein the battery pack is mounted on the device body and is suitable for supplying power to the device body.

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