Filling structure, battery pack and electric equipment

Abstract

The utility model provides a filling structure, a battery pack and electric equipment. The filling structure is used for being arranged between a battery cell and a battery tray, the filling structure comprises a side plate and a filling piece, and the side plate is provided with a conveying runner and at least one first inlet communicated with the conveying runner; the filling piece is arranged on the side plate and is provided with a filling cavity and at least one second inlet communicated with the filling cavity; and the conveying runner is communicated with the second inlet. Therefore, the expansion of the side cell can be reduced, the cycle performance of the battery pack is improved, and the electrical performance of the battery pack is further improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of battery technology, and in particular to a filling structure, a battery pack, and an electrical device. Background Art

[0002] In related technologies, the cells in a battery pack are mounted on a battery tray with a gap between the tray and the cells. This allows the side cells ample room to expand during their lifecycle, potentially causing them to expand more severely than the center cells, leading to faster electrical performance degradation and outliers, which in turn affects the overall pack's performance. Utility Model Content

[0003] The embodiments of the present application provide a filling structure, a battery pack and an electrical device, which can solve the problem that when the side battery cells expand during the life cycle, they will have sufficient expansion space, so that the expansion of the side battery cells may be more serious than that of the central battery cells, and the electrical performance will decay faster and become outliers, thereby affecting the electrical performance of the entire pack.

[0004] The embodiments of this application provide the following technical solutions:

[0005] A first aspect of an embodiment of the present application provides a filling structure for being arranged between a battery cell and a battery tray, the filling structure comprising:

[0006] a side plate, the side plate having a delivery channel and at least one first inlet communicating with the delivery channel;

[0007] A filling member is provided on the side plate, the filling member having a filling cavity and at least one second inlet communicating with the filling cavity;

[0008] The delivery channel is communicated with the second inlet.

[0009] It can be understood that the side plate is used to protect the end face of the battery cell and can isolate the direct contact between the battery tray and the battery cell to insulate the battery cell. The first inlet is connected to the conveying flow channel, and the filling medium can be guided into the conveying flow channel through the first inlet. The conveying flow channel is connected to the second inlet, and the second inlet is connected to the filling cavity, so that the filling medium flowing into the conveying flow channel can enter the second inlet and flow into the filling cavity through the second inlet. The setting of the filling cavity can accommodate the filling medium, so that the filling medium can be filled between the battery cell and the battery tray, thereby filling the installation gap between the battery cell and the battery tray, reducing the expansion of the side battery cell, improving the cycle performance of the battery pack, and thus improving the electrical performance of the battery pack.

[0010] In a feasible embodiment, along the height direction of the side plate, the first inlet is located above the second inlet.

[0011] It can be understood that along the height direction of the side plate, the first inlet is located above the second inlet, so that the filling medium can enter the conveying channel after passing through the first inlet under the action of gravity, and be conveyed to the second inlet through the conveying channel, thereby improving the conveying efficiency of the filling medium.

[0012] In a feasible embodiment, a plurality of first inlets are provided, and the plurality of first inlets are arranged at intervals.

[0013] It is understandable that increasing the number of first inlets can increase the total cross-sectional area of ​​the first inlets, thereby improving the filling efficiency of the filling medium and shortening the filling time of the filling piece.

[0014] In a possible embodiment, the delivery channel and the second inlet are sealedly connected.

[0015] It is understandable that the sealed connection between the delivery channel and the second inlet can improve the connection stability between the delivery channel and the second inlet, thereby providing leak-proof protection for the filling medium and reducing the occurrence of leakage of the filling medium.

[0016] In a feasible embodiment, the side plate further has at least one first outlet communicating with the delivery channel;

[0017] The first outlet is connected to the second inlet;

[0018] Along the height direction of the side plate, the first inlet is located above the first outlet.

[0019] It can be understood that, along the height direction of the side plate, the first inlet is located above the first outlet, so that the filling medium can enter the conveying channel after passing through the first inlet under the action of gravity, and be transported to the first outlet through the conveying channel, and then guided to the second inlet through the first outlet, thereby improving the conveying efficiency of the filling medium.

[0020] In a feasible embodiment, a plurality of first outlets are provided, and the plurality of first outlets are spaced apart on the side panel;

[0021] There are multiple second inlets, and the multiple second inlets are spaced apart on the filling piece;

[0022] The plurality of first outlets and the plurality of second inlets are connected in a one-to-one correspondence.

[0023] It can be understood that increasing the number of first outlets and second inlets can improve the filling efficiency of the filling medium flowing into the filling cavity. Multiple first outlets and multiple second inlets are connected one-to-one, which can shorten the filling time of the filling piece and thus improve the filling efficiency of the filling structure.

[0024] In a feasible embodiment, the side plate is provided with a flow channel groove, one side of the filling piece is connected to the side plate, and the flow channel groove is closed to form a conveying flow channel.

[0025] It can be understood that one side of the filling piece is connected to the side plate and closes the flow channel to form a conveying flow channel, which can improve the sealing of the conveying flow channel to reduce the occurrence of leakage of the filling medium from the flow channel groove, thereby providing safety protection for the conveying flow channel.

[0026] In a feasible embodiment, the side panel includes a side panel body and a closing body, the side panel body is provided with a flow channel, one side of the closing body is connected to the side panel body and closes the flow channel to form a conveying flow channel, the other end of the closing body is connected to the filling piece, the first inlet is provided on the side panel body, and the first outlet is provided on the closing body.

[0027] As will be understood, the closing body supports the filler and is connected to the side panels and filler, respectively, thereby improving the stability of the connection between the filler and the side panels. One side of the closing body connects to the side panel body and closes the flow channel to form the delivery channel. This improves the sealing of the delivery channel, reduces the risk of leakage of the filling medium from the flow channel, and thus provides safety protection for the delivery channel.

[0028] In a feasible embodiment, the side panel body is further provided with a plurality of reinforcing ribs, and the closing body abuts against the reinforcing ribs.

[0029] It is understood that the reinforcing ribs are used to support the side panel body to increase its bending strength. Increasing the number of reinforcing ribs can extend the service life of the side panel body, thereby extending the service life of the filling structure and battery pack. The contact between the enclosure and the reinforcing ribs allows the reinforcing ribs to support the enclosure, thereby increasing the service life of the enclosure and reducing the occurrence of the enclosure squeezing other parts of the side panel body, thereby extending the service life of the side panel body.

[0030] In a possible embodiment, the first outlet and the second inlet are sealedly connected.

[0031] It is understandable that the sealed connection between the first outlet and the second inlet can improve the connection stability between the first outlet and the second inlet, thereby providing leak-proof protection for the filling medium and reducing the occurrence of leakage of the filling medium.

[0032] In a feasible embodiment, the filling structure further includes a sealing portion, which is disposed around the first outlet and the second inlet to seal the first outlet and the second inlet.

[0033] It can be understood that the sealing portion is used to connect the side plate and the filling piece so that the first outlet and the second inlet are sealed and connected, thereby improving the connection stability between the filling piece and the side plate and improving the conveying efficiency of the filling medium.

[0034] In a feasible embodiment, the filling piece further has at least one second outlet communicated with the filling chamber, and the second outlet is used for exhaust.

[0035] It can be understood that in the process of the filling medium flowing into the filling cavity, the filling medium will squeeze the air in the filling cavity, and the second outlet is used as an exhaust port to ensure that in the process of the filling medium flowing into the filling cavity, the air in the filling piece can be discharged to the outside through the second outlet; as the delivery volume of the filling medium increases, the volume of the filling medium located in the filling cavity increases.

[0036] In a possible embodiment, along the height direction of the filling piece, the second outlet is located above the second inlet.

[0037] It is understandable that, along the height direction of the filling piece, the second outlet is located above the second inlet. When the filling medium overflows from the second outlet, the filling of the filling medium is completed, and the second outlet can serve as an early warning.

[0038] In a feasible embodiment, a plurality of second outlets are provided, and the plurality of second outlets are arranged at intervals.

[0039] It is understandable that increasing the number of second outlets can improve the efficiency of discharging the air in the filling piece to the outside during the process of the filling medium flowing into the filling cavity, thereby providing safety protection for the filling piece.

[0040] In a feasible embodiment, the filling piece further has at least one second outlet communicated with the filling cavity, the second outlet is used for exhaust, and the side plate body has at least one overflow groove communicated with the second outlet.

[0041] It is understood that if the filling medium overflows from the second outlet, the filling medium can flow into the overflow groove after passing through the second outlet, thereby reducing the occurrence of the filling medium flowing toward the side close to the battery cell or battery tray, thereby improving the safety performance of the filling structure. Increasing the number of overflow grooves can increase the contact area between the filling cavity and the external environment during the process of the filling medium flowing into the filling cavity, thereby improving the exhaust efficiency of the filling cavity.

[0042] In a feasible embodiment, the closing body has a through hole communicating with the overflow groove, and an end of the through hole facing away from the overflow groove is communicated with the second outlet.

[0043] It can be understood that the through hole is used to connect the second outlet and the overflow groove, so that the filling medium can flow along the second outlet to the overflow groove.

[0044] In a feasible embodiment, the first outlet has a first extension length L1 along the length direction of the side plate, and the first extension length L1 satisfies: 5mm≤L1≤100mm; and / or,

[0045] The first outlet has a second extension length L2 along a height direction of the side plate, and the first extension length L2 satisfies: 5 mm ≤ L2 ≤ 100 mm.

[0046] It can be understood that the first extension length L1 satisfies: 5mm≤L1≤100mm, which can reduce the processing cost of the first outlet while allowing the filling medium to be smoothly discharged; the second extension length L2 satisfies: 5mm≤L2≤100mm, which can reduce the processing cost of the first outlet while allowing the filling medium to be smoothly discharged.

[0047] In a feasible embodiment, the overflow groove has a third extension length L3 along the length direction of the side plate, and the third extension length L3 satisfies: 2mm≤L3≤20mm; and / or,

[0048] The overflow groove has a fourth extension length L4 along the height direction of the side plate, and the fourth extension length L4 satisfies: 2mm≤L4≤20mm.

[0049] It can be understood that the third extension length L3 satisfies: 2mm≤L3≤20mm, which can accommodate the filling medium overflowing from the second outlet and reduce the waste of the filling medium to improve the utilization rate of the filling medium overflowing from the second outlet; the fourth extension length L4 satisfies: 2mm≤L4≤20mm, which can accommodate the filling medium overflowing from the second outlet and reduce the waste of the filling medium to improve the utilization rate of the filling medium overflowing from the second outlet.

[0050] In a feasible implementation manner, the first inlet is a circular hole having a first diameter D, and the first diameter D satisfies: 4 mm ≤ D ≤ 8 mm.

[0051] It can be understood that the setting of the circular hole can improve the efficiency of the filling medium entering the first inlet 101, and the setting of the circular hole can make the flow velocity of the filling medium more uniform, thereby improving the transportation stability of the filling medium. The first diameter D satisfies: 4mm≤D≤8mm, which can reduce the production cost of the first inlet 101 while ensuring the stability of the flow velocity of the filling medium.

[0052] In a feasible embodiment, the filling member includes a first film and a second film connected to each other, the first film is connected to the side plate, and the second film is located on a side of the first film away from the side plate;

[0053] The first film and the second film enclose a filling cavity;

[0054] The second inlet is arranged on the first film.

[0055] It can be understood that the first film 204 is used to connect with the side plate 100, and the second film 205 is used to abut against the battery housing. The first film 204 and the second film 205 enclose a filling cavity to accommodate the filling medium.

[0056] In a feasible embodiment, along the direction from the first film to the second film, the first film has a first minimum thickness, and the first minimum thickness is 0.03 mm to 0.8 mm; and / or,

[0057] Along the direction from the first film to the second film, the second film has a second minimum thickness, and the second minimum thickness is 0.03 mm to 0.8 mm.

[0058] It can be understood that the first minimum thickness is 0.03mm to 0.8mm, which can improve the strength of the first film and reduce the space occupied by the first film; the second minimum thickness is 0.03mm to 0.8mm, which can improve the strength of the second film and reduce the space occupied by the second film.

[0059] In a possible embodiment, the filling piece is configured as a filling bag, and the filling bag is a plastic piece.

[0060] It is understandable that the filling bag has the advantage of low processing difficulty and can reduce the use cost of the filling piece. The plastic piece has strong chemical corrosion resistance and can increase the service life of the filling piece.

[0061] A second aspect of an embodiment of the present application provides a battery pack, including a battery tray, multiple battery cells and a filling structure. The multiple battery cells are arranged along their own thickness direction and installed on the battery tray. The filling structure is arranged between the multiple battery cells and the inner side wall of the battery tray, and a filling medium is provided in the conveying flow channel and the filling cavity.

[0062] A third aspect of an embodiment of the present application provides an electrical device, including an electrical device and a battery pack, wherein the battery pack is used to provide electrical energy to the electrical device.

[0063] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the filling structure, battery pack and electrical equipment provided by the embodiments of the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0065] Figure 1 A schematic diagram of the connection structure of the battery cell, battery tray and installation gap provided in an embodiment of the present application;

[0066] Figure 2 A schematic diagram of the exploded structure of the side panels and fillers provided in an embodiment of the present application;

[0067] Figure 3 This is a schematic diagram of the main structure of the side panel provided in an embodiment of the present application;

[0068] Figure 4 This is a schematic diagram of the main structure of the filler provided in an embodiment of the present application;

[0069] Figure 5 The second schematic diagram of the main structure of the filling piece provided in the embodiment of the present application;

[0070] Figure 6 The third schematic diagram of the main structure of the filler provided in the embodiment of the present application;

[0071] Figure 7 A schematic diagram of the exploded structure of the side panels, the closing body, and the filling member provided in an embodiment of the present application;

[0072] Figure 8 This is a second schematic diagram of the main structure of the side panel provided in an embodiment of the present application.

[0073] Description of reference numerals:

[0074] 10-battery cell;

[0075] 20-battery tray;

[0076] 30-installation clearance;

[0077] 40-filling structure;

[0078] 100 - side panel; 1001 - side panel body; 1002 - reinforcing rib; 101 - first inlet; 102 - first outlet; 103 - delivery channel; 1031 - channel groove; 104 - sealing portion; 105 - overflow groove;

[0079] 200 - filling piece; 201 - second inlet; 202 - filling chamber; 203 - second outlet; 204 - first film; 205 - second film;

[0080] 300-enclosed body; 301-through hole;

[0081] L1-first extension length;

[0082] L2-second extension length;

[0083] L3-third extension length;

[0084] L4 - fourth extension length;

[0085] D-first diameter. DETAILED DESCRIPTION

[0086] like Figure 1 As shown, in the related art, during the entire life cycle of the battery cell 10, as the number of cycles of the battery cell 10 increases, the single battery cell 10 will produce irreversible expansion due to SEI film growth, gas production, etc. At present, during the installation of the battery cell 10 and the tray, a certain installation gap 30 needs to be reserved to absorb the tolerance. The battery cell 10 closest to the battery tray 20 will expand toward the side close to the installation gap 30, so that the battery cell 10 closest to the battery tray 20 expands more seriously than the battery cells 10 at other positions, and the electrical performance decays faster, resulting in outliers, thereby causing the performance of the battery cell 10 to decay, and thus causing the electrical performance of the battery pack to deteriorate.

[0087] The filling structure provided in the embodiment of the present application is used to be arranged between the battery cell and the battery tray. The side plate is used to protect the end face of the battery cell and can isolate the direct contact between the battery tray and the battery cell to insulate the battery cell. The first inlet is connected to the conveying flow channel, and the filling medium can be guided through the first inlet into the conveying flow channel. The conveying flow channel is connected to the second inlet, and the second inlet is connected to the filling cavity, so that the filling medium flowing into the conveying flow channel can enter the second inlet and flow into the filling cavity through the second inlet. The setting of the filling cavity can accommodate the filling medium, so that the filling medium can be filled between the battery cell and the battery tray, thereby filling the installation gap between the battery cell and the battery tray, reducing the expansion of the side battery cells, improving the cycle performance of the battery pack, and thus improving the electrical performance of the battery pack.

[0088] like Figure 2 As shown, the filling structure 40 provided in an embodiment of the present application is used to be arranged between the battery cell 10 and the battery tray 20, and the filling structure 40 includes: a side plate 100 and a filling piece 200, the side plate 100 has a conveying channel 103 and at least one first inlet 101 connected to the conveying channel 103; the filling piece 200 is arranged on the side plate 100, the filling piece 200 has a filling cavity 202 and at least one second inlet 201 connected to the filling cavity 202; the conveying channel 103 is connected to the second inlet 201.

[0089] It should be noted that the end face of the side panel 100 facing away from the filling piece 200 is connected to the end face of the battery cell 10, and the end face of the filling piece 200 facing away from the side panel 100 is connected to the battery tray 20. The medium in the filling cavity 202 can flow toward the side panel 100 to drive the filling piece 200 to abut the battery tray 20, and push the side panel 100 to move toward the side close to the battery cell 10, so that the side panel 100 abuts the battery cell 10; thereby filling the installation gap 30 between the battery tray 20 and the battery cell 10.

[0090] It should be noted that the filling medium should have the following characteristics: the initial state is gaseous or liquid, and it has a certain fluidity to ensure that it can fully flow into the filling gap. After a period of time or a series of treatments, the filling medium can solidify to achieve the purpose of filling the gap. The filling medium is not limited to foam glue, room temperature fast-curing silicone rubber and potting glue, etc.

[0091] It is understandable that there is no limitation on the specific configuration of the filling medium, and it can be selected according to actual use requirements.

[0092] It should be noted that the first inlet 101 has a variety of different configuration shapes. The configuration shapes of the first inlet 101 are described below with examples.

[0093] In a feasible embodiment, the first inlet 101 is a circular hole. The setting of the circular hole has the advantage of low processing difficulty, thereby improving the processing efficiency of the first inlet 101.

[0094] In another feasible embodiment, the second inlet 201 is a square hole. The square hole has the advantage of low processing difficulty, thereby improving the processing efficiency of the first inlet 101.

[0095] It is understandable that there is no limitation on the configuration shape of the first inlet 101 and it can be selected according to actual use requirements.

[0096] It should be noted that, along the height direction of the side plate 100 , the first inlet 101 is located above the second inlet 201 .

[0097] It can be understood that, along the height direction of the side plate 100, the first inlet 101 is located above the second inlet 201, so that the filling medium can enter the conveying channel 103 after passing through the first inlet 101 under the action of gravity, and be conveyed to the second inlet 201 through the conveying channel 103, so as to improve the conveying efficiency of the filling medium.

[0098] In the filling structure 40 provided in the embodiment of the present application, a plurality of first inlets 101 are provided, and the plurality of first inlets 101 are arranged at intervals.

[0099] It is understandable that increasing the number of first inlets 101 can increase the total cross-sectional area of ​​the first inlets 101 , thereby improving the filling efficiency of the filling medium and shortening the filling time of the filling piece 200 .

[0100] It should be noted that the delivery channel 103 and the second inlet 201 are sealed and connected.

[0101] It is understandable that the sealed connection between the delivery channel 103 and the second inlet 201 can improve the connection stability between the delivery channel 103 and the second inlet 201 to provide leak-proof protection for the filling medium, thereby reducing the occurrence of leakage of the filling medium.

[0102] It should be noted that the side plate 100 also has at least one first outlet 102 connected to the delivery channel 103; the first outlet 102 is connected to the second inlet 201; along the height direction of the side plate 100, the first inlet 101 is located above the first outlet 102.

[0103] It can be understood that, along the height direction of the side panel 100, the first inlet 101 is located above the first outlet 102, so that the filling medium can enter the conveying channel 103 after passing through the first inlet 101 under the action of gravity, and be conveyed to the first outlet 102 through the conveying channel 103, and then guided to the second inlet 201 through the first outlet 102, thereby improving the conveying efficiency of the filling medium.

[0104] In the filling structure 40 provided in the embodiment of the present application, a plurality of first outlets 102 are provided, and the plurality of first outlets 102 are arranged at intervals on the side plate 100; a plurality of second inlets 201 are provided, and the plurality of second inlets 201 are arranged at intervals on the filling piece 200; the plurality of first outlets 102 and the plurality of second inlets 201 are connected one-to-one.

[0105] It can be understood that increasing the number of first outlets 102 and second inlets 201 can improve the filling efficiency of the filling medium flowing into the filling cavity 202. Multiple first outlets 102 and multiple second inlets 201 are connected one-to-one, which can shorten the filling time of the filling piece 200, thereby improving the filling efficiency of the filling structure 40.

[0106] It should be noted that the delivery channel 103 has a variety of different configurations. The configurations of the delivery channel 103 are described below with examples.

[0107] In a feasible embodiment, the delivery channel 103 is a delivery pipe, which is disposed in the side plate 100 , the first inlet 101 is connected to one end of the delivery pipe, and the first outlet 102 is connected to the other end of the delivery pipe.

[0108] It can be understood that the provision of the delivery tube can improve the delivery efficiency of the filling medium and has the advantage of a long service life, which can extend the service life of the filling structure 40.

[0109] In another feasible embodiment, the delivery channel 103 is a channel groove 1031 , which is opened on the side plate 100 , the first inlet 101 is connected to one end of the channel groove 1031 , and the first outlet 102 is connected to the other end of the channel groove 1031 .

[0110] It can be understood that the flow channel groove 1031 has the advantage of being easy to open, thereby reducing the difficulty of installing the filling structure 40.

[0111] It is understandable that there is no limitation on the arrangement of the delivery channel 103 and it can be selected according to actual use requirements, as long as the delivery channel 103 is connected to the first inlet 101 and the first outlet 102 respectively.

[0112] It should be noted that the flow channel groove 1031 has a variety of different configurations. The configurations of the flow channel groove 1031 are described below with examples.

[0113] In a feasible embodiment, the side plate 100 is provided with a flow channel groove 1031 , and one side of the filling piece 200 is connected to the side plate 100 and closes the flow channel groove 1031 to form the delivery channel 103 .

[0114] It can be understood that one side of the filling piece 200 is connected to the side plate 100 and closes the flow channel groove 1031 to form the delivery channel 103, which can improve the sealing of the delivery channel 103 to reduce the occurrence of leakage of the filling medium from the flow channel groove 1031, thereby providing safety protection for the delivery channel 103.

[0115] In another feasible embodiment, the side panel 100 includes a side panel body 1001 and a closing body 300, the side panel body 1001 is provided with a flow channel 1031, one side of the closing body 300 is connected to the side panel body 1001 and closes the flow channel 1031 to form a conveying flow channel 103, the other end of the closing body 300 is connected to the filling piece 200, the first inlet 101 is provided on the side panel body 1001, and the first outlet 102 is provided on the closing body 300.

[0116] It will be appreciated that the closing body 300 is used to support the filling piece 200 and is connected to the side panel 100 and the filling piece 200, respectively, thereby improving the connection stability between the filling piece 200 and the side panel 100. One side of the closing body 300 is connected to the side panel body 1001 and closes the flow channel groove 1031 to form the delivery channel 103. This can improve the sealing performance of the delivery channel 103, reduce the occurrence of leakage of the filling medium from the flow channel groove 1031, and thus provide safety protection for the delivery channel 103.

[0117] It is understandable that there is no limitation on the specific configuration of the flow channel 1031 and it can be selected according to actual use requirements.

[0118] It should be noted that the side panel body 1001 is further provided with a plurality of reinforcing ribs 1002 , and the closing body 300 abuts against the reinforcing ribs 1002 .

[0119] It is understood that the reinforcing ribs 1002 are used to support the side panel body 1001 to improve the bending strength of the side panel body 1001. Increasing the number of reinforcing ribs 1002 can extend the service life of the side panel body 1001, thereby extending the service life of the filling structure 40 and the battery pack. The contact between the enclosure 300 and the reinforcing ribs 1002 can enable the reinforcing ribs 1002 to support the enclosure 300, thereby increasing the service life of the enclosure 300 and reducing the occurrence of the enclosure 300 squeezing other parts of the side panel body 1001, thereby extending the service life of the side panel body 1001.

[0120] It should be noted that the multiple reinforcing ribs 1002 have a variety of different configuration shapes. The configuration shapes of the multiple reinforcing ribs 1002 are described below with examples.

[0121] In a feasible embodiment, multiple reinforcing ribs 1002 are connected to form a honeycomb shape, thereby improving the strength of the side panel body 1001, and in the event of a collision with the side panel body 1001, the honeycomb reinforcing ribs 1002 can unload the collision force to provide safety protection for at least one of the side panel body 1001, the filling structure 40 and the battery pack.

[0122] In another feasible embodiment, a plurality of reinforcing ribs 1002 are arranged at intervals along the extension direction of the side panel body 1001 , thereby improving the strength of the side panel body 1001 and extending the service life of the side panel body 1001 .

[0123] It is understandable that there is no restriction on the specific configuration shape of the multiple reinforcing ribs 1002, and they can be selected according to actual usage requirements.

[0124] It should be noted that the first outlet 102 and the second inlet 201 are sealed and connected.

[0125] It is understandable that the sealed connection between the first outlet 102 and the second inlet 201 can improve the connection stability between the first outlet 102 and the second inlet 201 to provide leak-proof protection for the filling medium, thereby reducing the occurrence of leakage of the filling medium.

[0126] It should be noted that the filling structure 40 provided in the embodiment of the present application further includes a sealing portion 104 .

[0127] It is understandable that the sealing portion 104 is used to connect the side plate 100 and the filling piece 200 so that the first outlet 102 and the second inlet 201 are sealed and connected, thereby improving the connection stability between the filling piece 200 and the side plate 100 and improving the conveying efficiency of the filling medium.

[0128] It should be noted that the sealing portion 104 may be a glue layer.

[0129] It should be noted that the sealing portion 104 has a variety of different installation positions. The installation positions of the sealing portion 104 are described below with examples.

[0130] In a feasible implementation manner, the filling piece 200 is adhered to the side panel 100 through the sealing portion 104 .

[0131] It can be understood that the filling piece 200 is bonded to the side plate 100 through the sealing portion 104, which can improve the connection stability between the first outlet 102 and the second inlet 201, thereby reducing the occurrence of leakage of the filling medium, and can improve the connection stability between the filling piece 200 and the side plate 100, thereby improving the conveying efficiency of the filling medium.

[0132] like Figure 3 and Figure 4 As shown, in another feasible embodiment, the sealing portion 104 is disposed around the first outlet 102 and the second inlet 201 to ensure a sealed connection between the first outlet 102 and the second inlet 201 .

[0133] It can be understood that the first outlet 102 and the second inlet 201 are connected by the sealing portion 104, which can improve the connection efficiency between the side panel 100 and the filling piece 200, and can reduce the connection cost between the side panel 100 and the filling piece 200 by reducing the use of the sealing portion 104.

[0134] It is understandable that there is no restriction on the location of the sealing portion 104 and it can be selected according to actual use requirements.

[0135] like Figure 5 As shown, the filling piece 200 provided in the embodiment of the present application further has at least one second outlet 203 communicating with the filling cavity 202 , and the second outlet 203 is used for exhausting air.

[0136] like Figure 6 and Figure 7As shown, it can be understood that, in the process of the filling medium flowing into the filling cavity 202, the filling medium will squeeze the air in the filling cavity 202, and the second outlet 203 is used as an exhaust port to ensure that in the process of the filling medium flowing into the filling cavity 202, the air in the filling piece 200 can be discharged to the outside through the second outlet 203; as the delivery volume of the filling medium increases, the volume of the filling medium located in the filling cavity 202 increases.

[0137] It should be noted that, along the height direction of the filling piece 200 , the second outlet 203 is located above the second inlet 201 .

[0138] It is understandable that, along the height direction of the filling piece 200 , the second outlet 203 is located above the second inlet 201 . When the filling medium overflows from the second outlet 203 , the filling of the filling medium is completed, and the second outlet 203 can serve as an early warning.

[0139] The embodiment of the present application provides a plurality of second outlets 203 , and the plurality of second outlets 203 are arranged at intervals.

[0140] It is understandable that increasing the number of second outlets 203 can improve the efficiency of discharging the air in the filling piece 200 to the outside during the process of the filling medium flowing into the filling cavity 202, thereby providing safety protection for the filling piece 200.

[0141] In the filling structure 40 provided in the embodiment of the present application, the filling piece 200 also has at least one second outlet 203 connected to the filling cavity 202, the second outlet 203 is used for exhaust, and the side plate body 1001 has at least one overflow groove 105, which is connected to the second outlet 203.

[0142] It is understood that if the filling medium overflows from the second outlet 203, the filling medium can flow into the overflow groove 105 after passing through the second outlet 203, thereby reducing the occurrence of the filling medium flowing toward the side close to the battery cell 10 or the battery tray 20, thereby improving the safety performance of the filling structure 40. Increasing the number of overflow grooves 105 can increase the contact area between the filling cavity 202 and the external environment during the process of the filling medium flowing into the filling cavity 202, thereby improving the exhaust efficiency of the filling cavity 202.

[0143] It should be noted that the closing body 300 has a through hole 301 communicating with the overflow groove 105 , and one end of the through hole 301 away from the overflow groove 105 is communicated with the second outlet 203 .

[0144] It can be understood that the through hole 301 is used to connect the second outlet 203 and the overflow groove 105 , so that the filling medium can flow along the second outlet 203 to the overflow groove 105 .

[0145] like Figure 8 As shown, the length of the first outlet 102 provided in the embodiment of the present application has a variety of different setting methods, and the length of the first outlet 102 is described below with examples.

[0146] In a feasible embodiment, the first outlet 102 has a first extension length L1 along the length direction of the side plate 100 , and the first extension length L1 satisfies: 5 mm ≤ L1 ≤ 100 mm.

[0147] It can be understood that the first extension length L1 satisfies: 5 mm ≤ L1 ≤ 100 mm, which can reduce the processing cost of the first outlet 102 while allowing the first outlet 102 to smoothly discharge the filling medium.

[0148] It should be noted that if the first extension length L1 is less than 5 mm, the filling medium will accumulate at the first outlet 102, thereby reducing the efficiency of the filling medium being discharged from the first outlet 102; if the first extension length L1 is greater than 100 mm, the processing cost of the first outlet 102 will increase, and the conveying speed of the filling medium will increase, resulting in an increase in the volume of the filling medium overflowing from the second outlet 203, thereby causing waste of the filling medium.

[0149] In another feasible embodiment, the first outlet 102 has a second extension length L2 along the height direction of the side plate 100 , and the second extension length L2 satisfies: 5 mm ≤ L2 ≤ 100 mm.

[0150] It is understandable that the second extension length L2 satisfies: 5 mm ≤ L2 ≤ 100 mm, which can reduce the processing cost of the first outlet 102 while allowing the first outlet 102 to smoothly discharge the filling medium.

[0151] It should be noted that if the second extension length L2 is less than 5 mm, the filling medium will accumulate at the first outlet 102, thereby reducing the efficiency of the filling medium being discharged from the first outlet 102; if the second extension length L2 is greater than 100 mm, the processing cost of the first outlet 102 will increase, and the conveying speed of the filling medium will increase, resulting in an increase in the volume of the filling medium overflowing from the second outlet 203, thereby causing waste of the filling medium.

[0152] In addition, in other feasible embodiments, the first outlet 102 has a first extension length L1 along the length direction of the side panel 100, and the first extension length L1 satisfies: 5mm≤L1≤100mm; the first outlet 102 has a second extension length L2 along the height direction of the side panel 100, and the second extension length L2 satisfies: 5mm≤L2≤100mm.

[0153] It can be understood that the first extension length L1 satisfies: 5mm≤L1≤100mm, which can reduce the processing cost of the first outlet 102 while allowing the filling medium to be smoothly discharged; the second extension length L2 satisfies: 5mm≤L2≤100mm, which can reduce the processing cost of the first outlet 102 while allowing the filling medium to be smoothly discharged.

[0154] It should be noted that if the first extension length L1 is less than 5 mm, the filling medium will accumulate at the first outlet 102, thereby reducing the efficiency of the filling medium being discharged from the first outlet 102; if the first extension length L1 is greater than 100 mm, the processing cost of the first outlet 102 will increase, and the conveying speed of the filling medium will increase, resulting in an increase in the volume of the filling medium overflowing from the second outlet 203, thereby causing waste of the filling medium.

[0155] It should be noted that if the second extension length L2 is less than 5 mm, the filling medium will accumulate at the first outlet 102, thereby reducing the efficiency of the filling medium being discharged from the first outlet 102; if the second extension length L2 is greater than 100 mm, the processing cost of the first outlet 102 will increase, and the conveying speed of the filling medium will increase, resulting in an increase in the volume of the filling medium overflowing from the second outlet 203, thereby causing waste of the filling medium.

[0156] It is understandable that there is no limitation on the length of the first outlet 102 , and the length can be selected according to actual use requirements.

[0157] It should be noted that the overflow groove 105 provided in the embodiment of the present application has a variety of different setting lengths. The setting lengths of the overflow groove 105 are illustrated below in turn.

[0158] In a feasible embodiment, the overflow groove 105 has a third extension length L3 along the length direction of the side plate 100, and the third extension length L3 satisfies: 2mm≤L3≤20mm.

[0159] It is understandable that the third extension length L3 satisfies: 2mm≤L3≤20mm, which can accommodate the filling medium overflowing from the second outlet 203 and reduce the waste of the filling medium, thereby improving the utilization rate of the filling medium overflowing from the second outlet 203.

[0160] It should be noted that if the third extension length L3 is less than 2 mm, the filling medium overflowing from the second outlet 203 will overflow to the outside through the overflow groove 105, resulting in the volume of the filling medium accommodated in the overflow groove 105 becoming smaller, thereby causing the filling medium to flow toward the side close to the battery cell 10 or the battery tray 20, thereby reducing the safety performance of the battery cell 10; if the third extension length L3 is greater than 20 mm, the volume of the filling medium overflowing from the second outlet 203 accommodated in the overflow groove 105 will become larger, resulting in waste of filling medium, thereby reducing the utilization rate of the filling medium.

[0161] In another feasible embodiment, the overflow groove 105 has a fourth extension length L4 along the height direction of the side plate 100, and the fourth extension length L4 satisfies: 2mm≤L4≤20mm.

[0162] It is understandable that the fourth extension length L4 satisfies: 2mm≤L4≤20mm, which can accommodate the filling medium overflowing from the second outlet 203 and reduce the waste of the filling medium, thereby improving the utilization rate of the filling medium overflowing from the second outlet 203.

[0163] It should be noted that if the fourth extension length L4 is less than 2 mm, the filling medium overflowing from the second outlet 203 will overflow to the outside through the overflow groove 105, resulting in the volume of the filling medium accommodated in the overflow groove 105 becoming smaller, thereby causing the filling medium to flow toward the side close to the battery cell 10 or the battery tray 20, thereby reducing the safety performance of the battery cell 10; if the fourth extension length L4 is greater than 20 mm, the volume of the filling medium overflowing from the second outlet 203 accommodated in the overflow groove 105 will become larger, resulting in waste of filling medium, thereby reducing the utilization rate of the filling medium.

[0164] In addition, in another feasible embodiment, the overflow groove 105 has a third extension length L3 along the length direction of the side panel 100, and the third extension length L3 satisfies: 2mm≤L3≤20mm; the overflow groove 105 has a fourth extension length L4 along the height direction of the side panel 100, and the fourth extension length L4 satisfies: 2mm≤L4≤20mm.

[0165] It can be understood that the third extension length L3 satisfies: 2mm≤L3≤20mm, which can accommodate the filling medium overflowing from the second outlet 203 and reduce the waste of the filling medium to improve the utilization rate of the filling medium overflowing from the second outlet 203; the fourth extension length L4 satisfies: 2mm≤L4≤20mm, which can accommodate the filling medium overflowing from the second outlet 203 and reduce the waste of the filling medium to improve the utilization rate of the filling medium overflowing from the second outlet 203.

[0166] It should be noted that if the third extension length L3 is less than 2 mm, the filling medium overflowing from the second outlet 203 will overflow to the outside through the overflow groove 105, resulting in the volume of the filling medium accommodated in the overflow groove 105 becoming smaller, thereby causing the filling medium to flow toward the side close to the battery cell 10 or the battery tray 20, thereby reducing the safety performance of the battery cell 10; if the third extension length L3 is greater than 20 mm, the volume of the filling medium overflowing from the second outlet 203 accommodated in the overflow groove 105 will become larger, resulting in waste of filling medium, thereby reducing the utilization rate of the filling medium.

[0167] It should be noted that if the fourth extension length L4 is less than 2 mm, the filling medium overflowing from the second outlet 203 will overflow to the outside through the overflow groove 105, resulting in the volume of the filling medium accommodated in the overflow groove 105 becoming smaller, thereby causing the filling medium to flow toward the side close to the battery cell 10 or the battery tray 20, thereby reducing the safety performance of the battery cell 10; if the fourth extension length L4 is greater than 20 mm, the volume of the filling medium overflowing from the second outlet 203 accommodated in the overflow groove 105 will become larger, resulting in waste of filling medium, thereby reducing the utilization rate of the filling medium.

[0168] The first inlet 101 provided in the embodiment of the present application is a circular hole having a first diameter D, and the first diameter D satisfies: 4 mm ≤ D ≤ 8 mm.

[0169] It can be understood that the setting of the circular hole can improve the efficiency of the filling medium entering the first inlet 101, and the setting of the circular hole can make the flow velocity of the filling medium more uniform, thereby improving the transportation stability of the filling medium. The first diameter D satisfies: 4mm≤D≤8mm, which can reduce the production cost of the first inlet 101 while ensuring the stability of the flow velocity of the filling medium.

[0170] It should be noted that if the first diameter D is less than 4 mm, the cross-sectional area of ​​the first inlet 101 will become smaller, thereby slowing down the flow rate of the filling medium, lengthening the filling time of the filling medium, and lowering the filling efficiency of the filling medium; if the first diameter D is greater than 8 mm, the cross-sectional area of ​​the first inlet 101 will become larger, thereby increasing the flow rate of the filling medium, and causing the filling medium to flow toward the side close to the battery cell 10 or the battery tray 20, thereby reducing the safety performance of the battery cell 10.

[0171] The filling piece 200 provided in an embodiment of the present application includes a first film 204 and a second film 205 connected to each other, the first film 204 is connected to the side plate 100, and the second film 205 is located on the side of the first film 204 away from the side plate 100; the first film 204 and the second film 205 enclose a filling cavity 202; the second inlet 201 is arranged on the first film 204.

[0172] It can be understood that the first film 204 is used to connect with the side plate 100, and the second film 205 is used to abut against the battery housing. The first film 204 and the second film 205 enclose a filling cavity 202 to accommodate the filling medium.

[0173] In the filling structure 40 provided in the embodiment of the present application, the first film 204 and the second film 205 have various thicknesses. The thicknesses of the first film 204 and the second film 205 are described below with examples.

[0174] In a feasible embodiment, along the direction from the first film 204 to the second film 205 , the first film 204 has a first minimum thickness, and the first minimum thickness is 0.03 mm to 0.8 mm;

[0175] It can be understood that the first minimum thickness is 0.03 mm to 0.8 mm, which can improve the strength of the first film 204 and reduce the space occupied by the first film 204.

[0176] It should be noted that if the first minimum thickness is less than 0.03 mm, the strength of the first film 204 will be low, resulting in leakage of the filling medium in the filling cavity 202 from the first film 204; if the first minimum thickness is greater than 0.8 mm, the space occupied by the first film 204 will be large, resulting in a smaller volume of the filling medium in the filling cavity 202, and worsening the filling effect of the filling structure 40.

[0177] In another possible embodiment, along the direction from the first film 204 to the second film 205 , the second film 205 has a second minimum thickness, and the second minimum thickness is 0.03 mm to 0.8 mm.

[0178] It can be understood that the second minimum thickness is 0.03 mm to 0.8 mm, which can improve the strength of the second film 205 and reduce the space occupied by the second film 205.

[0179] It should be noted that if the second minimum thickness is less than 0.03 mm, the strength of the second film 205 will be low, resulting in leakage of the filling medium in the filling cavity 202 from the second film 205; if the second minimum thickness is greater than 0.8 mm, the second film 205 will occupy a large space, resulting in a smaller volume of the filling medium in the filling cavity 202, and worsening the filling effect of the filling structure 40.

[0180] In addition, in other feasible embodiments, along the direction from the first film 204 to the second film 205, the first film 204 has a first minimum thickness, and the first minimum thickness is 0.03mm to 0.8mm; along the direction from the first film 204 to the second film 205, the second film 205 has a second minimum thickness, and the second minimum thickness is 0.03mm to 0.8mm.

[0181] It can be understood that the first minimum thickness is 0.03mm to 0.8mm, which can improve the strength of the first film 204 and reduce the space occupied by the first film 204; the second minimum thickness is 0.03mm to 0.8mm, which can improve the strength of the second film 205 and reduce the space occupied by the second film 205.

[0182] It should be noted that if the first minimum thickness is less than 0.03 mm, the strength of the first film 204 will be low, resulting in leakage of the filling medium in the filling cavity 202 from the first film 204; if the first minimum thickness is greater than 0.8 mm, the space occupied by the first film 204 will be large, resulting in a smaller volume of the filling medium in the filling cavity 202, and worsening the filling effect of the filling structure 40.

[0183] It should be noted that if the second minimum thickness is less than 0.03 mm, the strength of the second film 205 will be low, resulting in leakage of the filling medium in the filling cavity 202 from the second film 205; if the second minimum thickness is greater than 0.8 mm, the second film 205 will occupy a large space, resulting in a smaller volume of the filling medium in the filling cavity 202, and worsening the filling effect of the filling structure 40.

[0184] It is understandable that the thickness of the first film 204 and the second film 205 is not limited and can be selected according to actual use requirements.

[0185] It should be noted that there are many different connection methods between the first film 204 and the second film 205 . The connection methods between the first film 204 and the second film 205 are described below with examples.

[0186] In one feasible embodiment, the first film 204 and the second film 205 are processed by an integrated molding process. It is understood that the integrated molding process can improve the connection strength between the first film 204 and the second film 205, thereby increasing the service life of the filling member 200.

[0187] In another feasible embodiment, the first film 204 and the second film 205 are connected by a heat pressing process. It is understood that connecting the first film 204 and the second film 205 by a heat pressing process can reduce the difficulty of connecting the first film 204 and the second film 205, thereby improving the processing efficiency of the filling member 200.

[0188] It is understandable that there is no limitation on the connection method between the first film 204 and the second film 205 , and the connection method can be selected according to actual use requirements.

[0189] It should be noted that the filling piece 200 provided in the embodiment of the present application is constructed as a filling bag, and the filling bag is a plastic piece.

[0190] It is understandable that the filling bag has the advantage of low processing difficulty and can reduce the use cost of the filling piece 200. The plastic part has strong chemical corrosion resistance and can increase the service life of the filling piece 200.

[0191] An embodiment of the present application provides a battery pack, including a battery tray 20, a battery cell 10 and a filling structure 40 provided in the above embodiment. A plurality of battery cells 10 are arranged along their own thickness direction and installed on the battery tray 20. The filling structure 40 is arranged between the plurality of battery cells 10 and the inner side wall of the battery tray 20. A filling medium is provided in the conveying channel 103 and the filling cavity 202.

[0192] An embodiment of the present application further provides an electrical device, comprising an electrical device and a battery pack as described in any of the above embodiments, wherein the battery pack is used to provide electrical energy to the electrical device.

[0193] The electrical equipment in the embodiments of the present application may be a vehicle. For example, the vehicle may be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle. Accordingly, the electrical device may be the vehicle's drive mechanism or the vehicle's control system.

[0194] In addition, the electrical equipment may also be other energy storage devices, such as mobile phones, portable devices, laptop computers, electric toys, electric tools, ships and spacecraft, etc., among which the spacecraft may include airplanes, rockets, space shuttles or spacecraft.

[0195] Since the electric device in this embodiment includes the battery pack described in any of the above embodiments, the electric device includes the battery pack structure and beneficial effects, and this embodiment will not be further described here.

[0196] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0197] It should be noted that phrases such as "one embodiment," "an embodiment," "exemplary embodiments," and "some embodiments" in this specification may indicate embodiments that may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0198] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A filling structure, characterized in that: Used to be arranged between the battery core (10) and the battery tray (20), the filling structure (40) comprises: A side plate (100), the side plate (100) having a delivery channel (103) and at least one first inlet (101) communicating with the delivery channel (103); a filling piece (200) provided on the side plate (100), the filling piece (200) having a filling cavity (202) and at least one second inlet (201) communicating with the filling cavity (202); The delivery channel (103) is in communication with the second inlet (201).

2. A filling structure according to claim 1, characterized in that: Along the height direction of the side plate (100), the first inlet (101) is located above the second inlet (201).

3. A filling structure according to claim 1, characterized in that: A plurality of the first inlets (101) are provided, and the plurality of the first inlets (101) are arranged at intervals.

4. A filling structure according to claim 1, characterized in that: The delivery channel (103) and the second inlet (201) are sealed and connected.

5. A filling structure according to claim 1, characterized in that: The side plate (100) further has at least one first outlet (102) communicating with the delivery channel (103); The first outlet (102) is connected to the second inlet (201); Along the height direction of the side plate (100), the first inlet (101) is located above the first outlet (102).

6. A filling structure according to claim 5, characterized in that: A plurality of the first outlets (102) are provided, and the plurality of the first outlets (102) are arranged at intervals on the side plate (100); A plurality of the second inlets (201) are provided, and the plurality of the second inlets (201) are arranged at intervals on the filling member (200); The plurality of first outlets (102) and the plurality of second inlets (201) are connected in a one-to-one correspondence.

7. A filling structure according to claim 5, characterized in that: The side plate (100) is provided with a flow channel groove (1031), and one side of the filling piece (200) is connected to the side plate (100) and closes the flow channel groove (1031) to form the delivery flow channel (103).

8. A filling structure according to claim 5, characterized in that: The side plate (100) comprises a side plate body (1001) and a closing body (300), wherein the side plate body (1001) is provided with a flow channel groove (1031), one side of the closing body (300) is connected to the side plate body (1001) and closes the flow channel groove (1031) to form the delivery flow channel (103), and the other end of the closing body (300) is connected to the filling piece (200), the first inlet (101) is provided on the side plate body (1001), and the first outlet (102) is provided on the closing body (300).

9. A filling structure according to claim 8, characterized in that: The side plate body (1001) is further provided with a plurality of reinforcing ribs (1002), and the closing body (300) abuts against the reinforcing ribs (1002).

10. The filling structure according to claim 5, characterized in that: The first outlet (102) and the second inlet (201) are sealed and connected.

11. The filling structure according to claim 5, characterized in that: The filling structure (40) further comprises a sealing portion (104), wherein the sealing portion (104) is arranged around the first outlet (102) and the second inlet (201), so as to seal the first outlet (102) and the second inlet (201).

12. A filling structure according to any one of claims 1 to 11, characterized in that: The filling piece (200) further has at least one second outlet (203) in communication with the filling cavity (202), and the second outlet (203) is used for exhausting gas.

13. A filling structure according to claim 12, characterized in that: Along the height direction of the filling piece (200), the second outlet (203) is located above the second inlet (201).

14. A filling structure according to claim 12, characterized in that: A plurality of the second outlets (203) are provided, and the plurality of the second outlets (203) are arranged at intervals.

15. A filling structure according to claim 8 or 9, characterized in that: The filling piece (200) further comprises at least one second outlet (203) in communication with the filling cavity (202), wherein the second outlet (203) is used for exhausting gas, and the side plate body (1001) comprises at least one overflow groove (105), wherein the overflow groove (105) is in communication with the second outlet (203).

16. A filling structure according to claim 15, characterized in that: The closing body (300) has a through hole (301) communicating with the overflow groove (105), and one end of the through hole (301) facing away from the overflow groove (105) is communicated with the second outlet (203).

17. A filling structure according to any one of claims 5 to 11, characterized in that: The first outlet (102) has a first extension length L1 along the length direction of the side plate (100), and the first extension length L1 satisfies: 5mm≤L1≤100mm; and / or, The first outlet (102) has a second extension length L2 along the height direction of the side plate (100), and the first extension length L2 satisfies: 5mm≤L2≤100mm.

18. The filling structure according to claim 15, characterized in that: The overflow groove (105) has a third extension length L3 along the length direction of the side plate (100), and the third extension length L3 satisfies: 2mm≤L3≤20mm; and / or, The overflow groove (105) has a fourth extension length L4 along the height direction of the side plate (100), and the fourth extension length L4 satisfies: 2mm≤L4≤20mm.

19. A filling structure according to any one of claims 1 to 11, characterized in that: The first inlet (101) is a circular hole having a first diameter D, and the first diameter D satisfies: 4mm≤D≤8mm.

20. A filling structure according to any one of claims 1 to 11, characterized in that: The filling member (200) comprises a first film (204) and a second film (205) connected to each other, wherein the first film (204) is connected to the side plate (100), and the second film (205) is located on a side of the first film (204) facing away from the side plate (100); The first film (204) and the second film (205) enclose and form the filling cavity; The second inlet (201) is provided on the first film (204).

21. A filling structure according to claim 20, characterized in that: Along the direction from the first film (204) to the second film (205), the first film (204) has a first minimum thickness, and the first minimum thickness is 0.03 mm to 0.8 mm; and / or, Along the direction from the first film (204) to the second film (205), the second film (205) has a second minimum thickness, and the second minimum thickness is 0.03 mm to 0.8 mm.

22. A filling structure according to any one of claims 1 to 11, characterized in that: The filling piece (200) is configured as a filling bag, and the filling bag is a plastic piece.

23. A battery pack, characterized in that: The invention comprises a battery tray (20), a plurality of battery cells (10) and a filling structure according to any one of claims 1 to 22, wherein the plurality of battery cells (10) are arranged along their thickness direction and installed on the battery tray (20), the filling structure (40) is arranged between the plurality of battery cells (10) and the inner side wall of the battery tray (20), and a filling medium is provided in the conveying channel (103) and the filling cavity (202).

24. An electrical device, characterized in that: It comprises an electric device and the battery pack according to claim 23, wherein the battery pack is used to provide electrical energy to the electric device.

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