Filling assembly, battery pack and electric equipment

Abstract

The utility model relates to a filling assembly, a battery pack and electric equipment, the filling assembly is suitable for being filled in a gap between a side beam of a battery box body and a battery module, the filling assembly comprises a colloid piece and a heat exchange piece which are arranged in a stacked mode, and the side, away from the heat exchange piece, of the colloid piece is suitable for abutting against the side beam; the side, away from the colloid piece, of the heat exchange piece is suitable for abutting against the battery module. The colloid piece can be matched with the heat exchange piece and fully fills the gaps of different battery packs, so that the side beam can apply enough constraining force to the battery module through the colloid piece and the heat exchange piece, the heat exchange piece can exchange heat with the end face of the battery module in the first direction, and the heat exchange effect on the battery module is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of battery pack, and in particular, to a filling assembly, a battery pack and an electric device. BACKGROUND

[0002] In order to assemble the battery module into the battery box of the battery pack, an assembly gap is usually reserved between the battery module and the side beam of the battery box. If the assembly gap is not filled to constrain the battery module, the expansion force generated by the charging and discharging of the battery module will not only cause the performance and life attenuation of the battery module, but also may cause the size of the battery module to be out of tolerance and damage the surrounding structural members.

[0003] In the related art, the assembly gap between the side beam and the battery module is usually filled with foam. However, due to the manufacturing and assembly tolerances of various components of the battery pack, the assembly gap of different battery packs is different. Therefore, the foam is difficult to match the assembly gap of different battery packs. If the foam is too thick, it will be difficult to put the foam into the assembly gap, and it is easy to be dislocated due to friction. If the foam is too thin, the foam can provide less resilience, and cannot provide enough constraint force for the battery module. UTILITY MODEL CONTENT

[0004] The purpose of the present disclosure is to provide a filling assembly, a battery pack and an electric device to at least partially solve the above technical problems.

[0005] In order to achieve the above purpose, according to a first aspect of the present disclosure, a filling assembly is provided, which is adapted to fill into the gap between the side beam of the battery box and the battery module;

[0006] The filling assembly comprises a gel member and a heat exchange member arranged in layers.

[0007] The side of the gel member away from the heat exchange member is adapted to abut against the side beam, and the side of the heat exchange member away from the gel member is adapted to abut against the battery module.

[0008] Optionally, the rigidity of the heat exchange member at least in the middle region in the height direction is greater than the rigidity of the gel member.

[0009] The middle region of the heat exchange member corresponds to the middle part of the battery module in the height direction.

[0010] Optionally, a flow channel is arranged in the heat exchange member, and the flow channel is used for the heat exchange medium to pass through for heat exchange with the battery module.

[0011] Optionally, the heat exchange member is configured as a heat-conducting and heat-dissipating member.

[0012] Optionally, the heat exchange member is configured as a plate-shaped member, and includes a heat exchange shell having a cavity therein and a reinforcing rib provided in the cavity.

[0013] Optionally, the heat exchange shell includes a bottom wall and two side walls connected to the bottom wall in a first direction, and an upper end of the heat exchange shell has a first opening;

[0014] The reinforcing rib includes a sealing portion and an extending portion.

[0015] The sealing portion seals the first opening, and the extending portion is located inside the heat exchange shell.

[0016] Optionally, the heat exchange shell further has two second openings oppositely arranged in a second direction.

[0017] The extending portion includes two first extending portions, and upper ends of the two first extending portions are respectively connected to two ends of the sealing portion in the second direction.

[0018] The first extending portions extend in a height direction of the battery pack, and the first extending portions are used for sealing the second openings.

[0019] Optionally, the extending portion further includes at least one second extending portion.

[0020] The second extending portion is respectively connected to a corresponding first extending portion at two ends of the second direction.

[0021] Optionally, the number of the second extending portions is plural, and the plural second extending portions are arranged at intervals in the height direction of the battery pack.

[0022] In the height direction of the battery pack, a region defined between an uppermost second extending portion and a lowermost second extending portion corresponds to a middle part in the height direction of the battery module.

[0023] Optionally, the extending portion includes at least one third extending portion, an upper end of the third extending portion is connected to the sealing portion, and a lower end of the third extending portion is connected to the bottom wall.

[0024] According to a second aspect of the present disclosure, a battery pack is provided, including a battery box, a battery module, and the above-mentioned filling assembly.

[0025] The battery module is arranged in the battery box, and the battery module has the gap with a side beam of the battery box.

[0026] The filling assembly is filled in the gap.

[0027] Optionally, the side beam has a first connecting area for abutting against the colloid piece, at least a partial area of the first connecting area has a rigidity less than that of the heat exchange piece.

[0028] Optionally, the first connecting area comprises a first middle connecting area, and the heat exchange piece comprises a second middle connecting area.

[0029] In the height direction of the battery pack, the first middle connecting area corresponds to a middle portion of the height direction of the battery module, and the second middle connecting area corresponds to the middle portion of the height direction of the battery module.

[0030] The rigidity of the first middle connecting area is less than that of the second middle connecting area.

[0031] Optionally, the battery pack further comprises a bottom plate heat exchange piece, which is located in the battery box and supported on the bottom of the battery module.

[0032] Optionally, the side beam comprises a side beam shell and an inner rib arranged in the side beam shell.

[0033] Optionally, the number of the inner ribs is multiple, and the multiple inner ribs are arranged at intervals in the height direction of the side beam.

[0034] The heat exchange piece and the colloid piece are arranged in a first direction, each of the inner ribs extends in the first direction, and the inner ribs are connected to the two inner side walls of the side beam shell located on opposite sides in the first direction.

[0035] The heat exchange piece comprises a second middle connecting area, the second middle connecting area corresponds to a middle portion of the height direction of the battery module, and the second middle connecting area is provided with multiple reinforcing ribs arranged at intervals in the height direction of the heat exchange piece, each of the reinforcing ribs extends in the first direction.

[0036] In the height direction of the battery pack, the inner ribs are arranged in a staggered manner with the reinforcing ribs.

[0037] According to a third aspect of the present disclosure, a power consuming device is provided, comprising a device body and the above-mentioned battery pack, the battery pack is installed on the device body and used to supply power to the device body.

[0038] Through the above technical solution, the colloid piece and the heat exchange piece can be arranged in the gap between the battery module and the side beam in sequence, and the colloid piece and the heat exchange piece abut against the side beam and the battery module respectively. Since the colloid piece has fluidity before solidification, it is beneficial to overcome the tolerance of manufacturing and assembly of each component of the battery pack, fill the gap of different sizes, so that the colloid piece can match the heat exchange piece and fully fill the gap of different battery packs.

[0039] And, since the colloid piece has good rigidity after solidification, by arranging the colloid piece and the heat exchange piece, it is beneficial to enable the side beam to exert sufficient constraint force on the battery module through the colloid piece and the heat exchange piece, so that the situation of lithium precipitation of the battery module due to insufficient constraint force can be reduced during the charging and discharging process of the battery module, and the performance and service life of the battery module are improved. BRIEF DESCRIPTION OF DRAWINGS

[0040] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, further serve to explain the principles of the present disclosure.

[0041] Figure 1 is a schematic diagram of the three-dimensional structure of a battery pack provided by an embodiment of the present disclosure.

[0042] Figure 2 is a schematic diagram of the three-dimensional structure of a battery pack provided by an embodiment of the present disclosure, wherein the upper cover is not shown.

[0043] Figure 3 is a schematic diagram of the partial cross-sectional view of a battery pack provided by an embodiment of the present disclosure.

[0044] Figure 4 is a schematic diagram of the three-dimensional structure of a heat exchange piece provided by an embodiment of the present disclosure.

[0045] Figure 5 is an exploded schematic diagram of a heat exchange piece provided by an embodiment of the present disclosure.

[0046] Figure 6 is a curve diagram of the charging and discharging life cycle test of a battery pack provided by an embodiment of the present disclosure, wherein the rigidity of the colloid piece is less than that of the heat exchange piece.

[0047] Figure 7 is a curve diagram of the charging and discharging life cycle test of a battery pack provided by an embodiment of the present disclosure, wherein the rigidity of the colloid piece is greater than that of the heat exchange piece.

[0048] BRIEF DESCRIPTION OF DRAWINGS

[0049] 1000-battery pack; 100-battery box; 110-side beam; 111-first connecting area; 1111-first middle connecting area; 112-side beam shell; 113-inner rib; 120-first gap; 130-second gap; 140-upper cover; 150-gap; 200-battery module; 210-battery monomer; 600-filling assembly; 300-gel member; 400-heat exchange member; 410-second connecting area; 411-second middle connecting area; 420-heat exchange shell; 421-cavity; 422-bottom wall; 423-side wall; 424-first opening; 425-second opening; 430-stiffening rib; 431-sealing portion; 432-extended portion; 4321-first extended portion; 4322-second extended portion; 4323-third extended portion; 500-bottom plate heat exchange member. DETAILED DESCRIPTION

[0050] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0051] In the present disclosure, the orientation words such as "upper", "lower", "top", "bottom" used without the opposite description are generally defined with the upper, lower, top, bottom of the battery pack in the normal use state, only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, and a particular orientation configuration and operation, and therefore cannot be understood as a limitation on the present disclosure. "Inner" and "outer" refer to the inner and outer of the contour of the corresponding component. In addition, the terms "first", "second", etc. are used to distinguish one element from another element, and do not have sequentiality and importance.

[0052] In the description of the present disclosure, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "connected", "linked", "mounted" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. It can be understood according to the specific circumstances by those of ordinary skill in the art.

[0053] As mentioned above, it is difficult to match the assembly gap of different battery packs by the foam in the related art, so there are problems such as difficulty in putting the foam into the assembly gap when the foam is too thick, and the foam cannot provide enough constraint force for the battery module when the foam is too thin.

[0054] Therefore, as Figures 1 to 7As shown, according to the first aspect of the present disclosure, a filling assembly 600 is provided, which is adapted to fill into the gap 150 (as the first gap 120 below) between the side beam 110 of the battery box 100 and the battery module 200, and the filling assembly 600 comprises a colloid piece 300 and a heat exchange piece 400 arranged in a stack, the side of the colloid piece 300 away from the heat exchange piece 400 is adapted to abut against the side beam 110, and the side of the heat exchange piece 400 away from the colloid piece 300 is adapted to abut against the battery module 200.

[0055] By the above technical solution, the colloid piece 300 and the heat exchange piece 400 can be sequentially (here, the sequence only refers to the spatial sequence, not the time sequence) arranged in the gap 150 (i.e. the assembly gap) between the battery module 200 and the side beam 110, and the colloid piece 300 and the heat exchange piece 400 abut against the side beam 110 and the battery module 200 respectively, since the colloid piece 300 has fluidity before solidification, it is beneficial to overcome the tolerance of the manufacturing and assembly of each component of the battery pack 1000, and fill into the gap 150 of different sizes, so that the colloid piece 300 can match the heat exchange piece 400 and fully fill the gap 150 of different battery packs 1000.

[0056] Moreover, since the colloid piece 300 has good rigidity after solidification, by arranging the colloid piece 300 and the heat exchange piece 400, it is beneficial to enable the side beam 110 to exert sufficient constraint force on the battery module 200 through the colloid piece 300 and the heat exchange piece 400, so that the situation of lithium precipitation of the battery module 200 due to insufficient constraint force during the charging and discharging process of the battery module 200 can be reduced, and the performance and life of the battery module 200 can be improved.

[0057] In other words, compared with the related art of filling the assembly gap with foam, the battery pack 1000 provided by the present disclosure fills the gap 150 with the colloid piece 300 and the heat exchange piece 400, which is beneficial to overcome the problems that the foam is difficult to be put into the assembly gap (i.e. the gap 150) when it is too thick, and the foam cannot provide sufficient constraint force for the battery module 200 when it is too thin.

[0058] Furthermore, by using the fluidity of the colloid piece 300 before solidification, it is beneficial to reduce the tolerance requirement of the profile of the products on both sides of the bonding interface, thereby reducing the process precision of the sub-assembly products of the heat exchange piece 400 and the side beam 110, improving the qualification rate of the sub-assembly products, reducing the cost of the sub-assembly products, thereby saving the total cost of the battery pack 1000.

[0059] In summary, by sequentially arranging the colloid member 300 and the heat exchange member 400 in the first gap 120 between the battery module 200 and the side beam 110, not only can the first gap 120 be eliminated well by the good fluidity of the colloid member 300, and the requirement for the process precision of the sub-component products of the heat exchange member 400 and the side beam 110 is reduced, but also the battery module 200 can be well constrained by the good rigidity of the heat exchange member 400, so as to reduce the situation of lithium precipitation of the battery module 200 due to insufficient constraint force.

[0060] In addition, since the side of the heat exchange member 400 away from the colloid member 300 abuts against the battery module 200, heat exchange can be performed through the side end surface of the battery module 200 and the heat exchange member 400, the heat exchange area of the battery module 200 is increased, the temperature control efficiency of the battery module 200 is improved, and the effect of heat exchange of the battery module 200 is improved, for example, the efficiency of heating, cooling, and temperature keeping of the battery module 200 can be improved. Moreover, the arrangement of the heat exchange member 400 is also conducive to improving the temperature consistency of the side end of the battery module 200 and other positions.

[0061] Here, the side beam 110 can be a side beam of the battery box 100 or a partition beam of the battery box 100, and the disclosure does not limit this.

[0062] It can be understood that the first direction can be the length direction or the width direction of the battery pack 1000, and the first direction can be the length direction of the battery monomer 210 in the battery module 200 or the stacking direction of the battery monomer 210 in the battery module 200, and the disclosure does not limit this.

[0063] For example, in the embodiments as shown in Figure 2 and Figure 3 , the first direction is the stacking direction of the battery monomer 210 in the battery module 200, that is, the direction of the large surface of the battery monomer 210, and the end surface of the battery monomer 210 at one end of the battery module 200 in the first direction is the end of the battery module 200 in the first direction.

[0064] Herein, the up-down direction of the battery module 200 and the battery pack 1000 refers to the up-down direction of the battery pack 1000 in the use state, for example, when the battery pack 1000 is used for a vehicle, the lower side of the battery module 200 and the battery pack 1000 is the side of the battery pack 1000 close to the ground, and the upper side of the battery module 200 and the battery pack 1000 is the side of the battery pack 1000 away from the ground.

[0065] In addition, referring to Figure 3The battery module 200 described above can adopt single-row battery cells 210, or can be formed by combining multiple rows of battery cells 210. The battery cells 210 in different rows can have the same structure, or can have different structures. The present disclosure does not limit this.

[0066] It is found through research that if the constraint force applied to the battery module 200 is too large, it will also have adverse effects, for example, the profile of the battery module 200 cannot expand at all, which will cause the internal structure of the battery module 200 or its battery cells 210 to be damaged, thereby affecting the performance and safety of the battery module 200.

[0067] Therefore, as an embodiment, the rigidity of the heat exchange member 400 at least in the middle region in the height direction is greater than the rigidity of the gel member 300, wherein the middle region of the heat exchange member 400 corresponds to the middle of the battery module 200 in the height direction. In other words, the projection of the middle region of the heat exchange member 400 in the first direction at least partially overlaps the projection of the middle of the battery module 200 in the first direction, such as only partially overlaps or completely overlaps.

[0068] By setting the rigidity of the middle region of the heat exchange member 400 to be greater than the rigidity of the gel member 300, the battery module 200 or its battery cells 210 can be allowed to expand to a certain extent, and the heat exchange member 400 can be effectively attached to the battery module 200 during this process, thereby reducing the interface stiffness distortion of the battery module 200 and the battery cells 210 at the end thereof in the first direction due to incomplete contact with the heat exchange member 400, and reducing the occurrence of the situation that the lithium extraction thickness of the jelly-roll of the battery cell 210 is inconsistent, thereby reducing the service life of the battery cell 210. In addition, the effective attachment of the heat exchange member 400 to the battery module 200 also helps to ensure the effective heat exchange between the heat exchange member 400 and the battery cells 210.

[0069] In addition, since the expansion force of the middle of the battery module 200 in the height direction is usually large, the rigidity of the heat exchange member 400 at least in the middle region in the height direction is greater than the rigidity of the gel member 300, which helps the heat exchange member 400 to better constrain the expansion force of the middle of the battery module 200.

[0070] It can be understood that, in the present disclosure, the middle part of a component in the height direction of the component can include a central position in the height direction of the component, a certain area above the central position in the height direction, and a certain area below the central position in the height direction, for example, the middle part of the battery module 200 in the height direction of the battery module 200 can include a central position in the height direction of the battery module 200, a certain area above the central position in the height direction, and a certain area below the central position in the height direction,

[0071] It can be understood that, in the present disclosure, the middle part of a component in the height direction of the component can include a central position in the height direction of the component, a certain area above the central position in the height direction, and a certain area below the central position in the height direction, for example, the middle part of the battery module 200 in the height direction of the battery module 200 can include a central position in the height direction of the battery module 200, a certain area above the central position in the height direction, and a certain area below the central position in the height direction, Figure 6 As shown in FIG. 15B, when the rigidity of the colloid member 300 is greater than the rigidity of the heat exchange member 400, after the battery pack 1000 is charged and discharged for 1250 cycles, the total capacity of the battery pack 1000 is less than 85%. Figure 7 As shown in FIG. 15B, when the rigidity of the colloid member 300 is greater than the rigidity of the heat exchange member 400, after the battery pack 1000 is charged and discharged for 1250 cycles, the total capacity of the battery pack 1000 is less than 85%.

[0072] As shown in FIG. 15B, when the rigidity of the colloid member 300 is greater than the rigidity of the heat exchange member 400, after the battery pack 1000 is charged and discharged for 1250 cycles, the total capacity of the battery pack 1000 is less than 85%.

[0073] As shown in FIG. 15B, when the rigidity of the colloid member 300 is greater than the rigidity of the heat exchange member 400, after the battery pack 1000 is charged and discharged for 1250 cycles, the total capacity of the battery pack 1000 is less than 85%. Figure 2 As shown in FIG. 15B, when the rigidity of the colloid member 300 is greater than the rigidity of the heat exchange member 400, after the battery pack 1000 is charged and discharged for 1250 cycles, the total capacity of the battery pack 1000 is less than 85%.

[0074] In other words, in the first direction and the second direction, the battery module 200 can be connected to the corresponding side beam 110 through the colloid member 300 and the heat exchange member 400, which is conducive to increasing the connection position between the battery module 200 and the battery box 100, thereby improving the rigidity, strength and modal of the battery pack 1000. Moreover, the constraint position of the battery module 200 can be further increased, and the lithium precipitation of the battery module 200 in the first direction and the second direction due to insufficient constraint force can be reduced.

[0075] Optionally, the battery module 200 and the side beam 110 have two first gaps 120 spaced apart in the first direction and two second gaps 130 spaced apart in the second direction, and the two first gaps 120 and the two second gaps 130 can be connected to form a ring gap, and the four colloid members 300 can be connected to form a ring colloid member 300. In other words, the battery module 200 is arranged in the middle of the battery box 100, and the four sides of the battery module 200 can be connected to the side beam 110 of the battery box 100 through the colloid member 300, so that the rigidity, strength and modal of the battery pack 1000 are improved.

[0076] The type of the heat exchange member 400 is not limited in the present disclosure, and as an embodiment, the heat exchange member 400 can be configured as a heat-conducting heat-dissipating member. By configuring the heat exchange member 400 as a heat-conducting heat-dissipating member, the heat exchange member 400 can increase the heat transfer efficiency between the end surface of the battery module 200 in the first direction and the side beam 110, thereby improving the efficiency of passive heat exchange of the battery module 200. In the embodiment in which the heat exchange member 400 is configured as a heat-conducting heat-dissipating member, the material of the heat exchange member 400 is not limited in the present disclosure, including but not limited to metal material, and the heat exchange member 400 made of metal material has good heat conduction and relatively high rigidity.

[0077] As another embodiment of the present disclosure, a flow channel can be arranged in the heat exchange member 400, and the flow channel is used for the heat exchange medium for heat exchange with the battery module 200 to pass through. That is, the heat exchange member 400 is provided with a flow channel, and the heat exchange of the battery module 200 is realized by the heat exchange medium passing through the flow channel. Different temperature heat exchange medium can be introduced into the flow channel, so that the heat exchange member 400 can actively heat, cool and keep warm the end surface of the battery module 200 in the first direction.

[0078] This disclosure does not limit the structure of the heat exchanger 400. As one embodiment, the heat exchanger 400 can be constructed as a plate-shaped component, including a heat exchange shell 420 and reinforcing ribs 430. The heat exchange shell has a cavity 421, and the reinforcing ribs 430 are disposed in the cavity 421. The cavity 421 in the heat exchange shell 420 is beneficial for the lightweight of the heat exchanger 400, and the reinforcing ribs 430 disposed in the cavity 421 are beneficial for improving the rigidity of the heat exchange shell 420. Therefore, the heat exchanger 400 with this structure can not only have a lighter weight but also have sufficient rigidity, which is beneficial for reducing the overall weight of the battery pack 1000 while maintaining effective contact between the heat exchanger 400 and the battery module 200.

[0079] As another embodiment of this disclosure, the heat exchanger 400 may also be constructed as a solid structure.

[0080] Optionally, such as Figure 5 As shown, the heat exchange housing 420 includes a bottom wall 422 and two side walls 423 connected to the bottom wall 422 in a first direction. The upper end of the heat exchange housing 420 has a first opening 424. The reinforcing rib 430 includes a sealing portion 431 and an extension portion 432. The sealing portion 431 blocks the first opening 424, and the extension portion 432 is located inside the heat exchange housing 420.

[0081] The extension 432 can connect at least two side walls 423 of the heat exchange shell 420 in the first direction, or it can be spaced apart from the two side walls 423. In this way, the rigidity of the heat exchange shell 420 in the first direction can be improved. Furthermore, since the extension 432 can be installed into the interior of the heat exchange shell 420 through the first opening 424, the heat exchange shell 420 and the reinforcing rib 430 can be manufactured separately and then assembled, which helps to reduce the manufacturing difficulty and manufacturing cost of the heat exchange component 400.

[0082] In addition, by sealing the first opening 424 with the sealing part 431, it is beneficial to reduce the amount of adhesive flowing into the heat exchange housing 420 from the first opening 424, or to prevent adhesive from flowing into the heat exchange housing 420 from the first opening 424, thereby avoiding the waste of adhesive and the increase in weight of the heat exchange component 400.

[0083] Here, the first opening 424 can be constructed as a strip-shaped opening extending along the second direction, and the sealing part 431 can be constructed as a strip-shaped sealing part 431 adapted to the strip-shaped opening. The second direction can intersect with the first direction.

[0084] Optionally, such as Figure 5As shown, the heat exchange shell 420 further has two second openings 425 oppositely arranged along the second direction, and the extension part 432 includes two first extension parts 4321, the upper ends of the two first extension parts 4321 are connected to the two ends of the sealing part 431 along the second direction respectively, the first extension part 4321 extends along the height direction of the battery pack 1000, and the first extension part 4321 is used for plugging the second opening 425.

[0085] Since the heat exchange shell 420 has the first opening 424 extending along the second direction and the two second openings 425 oppositely arranged along the second direction, the heat exchange shell 420 can be configured as a U-shaped plate, so that the heat exchange shell 420 can be formed by bending a flat plate, thereby facilitating to reduce the processing difficulty and processing cost of the heat exchange shell 420.

[0086] In addition, by plugging the two second openings 425 by the two first extension parts 4321 respectively, it is beneficial to reduce the glue flowing into the inside of the heat exchange shell 420 from the second opening 425, or to avoid the glue flowing into the inside of the heat exchange shell 420 from the second opening 425, thereby facilitating to reduce the waste of glue and the weight increase of the heat exchange member 400 caused thereby.

[0087] Optionally, as shown in Figure 5 The extension part 432 further includes at least one second extension part 4322, and the second extension part 4322 is connected to the corresponding first extension part 4321 at the two ends along the second direction respectively.

[0088] Since the second extension part 4322 is connected to the corresponding first extension part 4321 at the two ends along the second direction respectively, the second extension part 4322 not only can improve the rigidity of the part of the corresponding heat exchange shell 420, but also can improve the rigidity of the two first extension parts 4321 along the second direction, thereby facilitating the first extension part 4321 to remain at the position of plugging the corresponding second opening 425, and further facilitating to avoid the glue flowing into the inside of the heat exchange shell 420 from the second opening 425 due to the deformation of the first extension part 4321.

[0089] Optionally, the number of the second extension part 4322 is multiple, and the multiple second extension parts 4322 are arranged at intervals along the height direction of the battery pack 1000, and the area defined between the uppermost second extension part 4322 and the lowermost second extension part 4322 along the height direction of the battery pack 1000 corresponds to the middle part of the height direction of the battery module 200.

[0090] The plurality of second extending portions 4322 are arranged along the height direction of the battery pack 1000, which can increase the rigidity of the plurality of parts of the heat exchange shell 420 in the height direction of the battery pack 1000, and also can increase the rigidity of the plurality of parts of the two first extending portions 4321 in the height direction of the battery pack 1000, and the weight of the extending portion 432 is not too large, thereby facilitating the lightweight of the heat exchange member 400.

[0091] Since the area defined between the uppermost second extending portion 4322 and the lowermost second extending portion 4322 has good rigidity in the first direction, the area defined between the uppermost second extending portion 4322 and the lowermost second extending portion 4322 corresponds to the middle part of the height direction of the battery module 200, which can make the area with large rigidity of the heat exchange member 400 correspond to the position with the largest expansion degree of the battery module 200, thereby facilitating the reduction of the deformation of the heat exchange member 400 due to the expansion force of the battery module 200, and further facilitating the guarantee of the effective adhesion of the heat exchange member 400 and the battery module 200.

[0092] Optionally, as shown in Figure 5 The extending portion 432 includes at least one third extending portion 4323, the upper end of the third extending portion 4323 is connected to the sealing portion 431, and the lower end of the third extending portion 4323 is connected to the bottom wall 422.

[0093] Since the upper end of the third extending portion 4323 is connected to the sealing portion 431, and the lower end of the third extending portion 4323 is connected to the bottom wall 422, the third extending portion 4323 not only can improve the rigidity of the corresponding part of the heat exchange shell 420, but also can improve the rigidity of the sealing portion 431 in the height direction of the battery pack 1000, thereby facilitating the sealing portion 431 to remain in the position of sealing the first opening 424, and further facilitating the avoidance of the glue flowing into the inside of the heat exchange shell 420 from the first opening 424 due to the deformation of the sealing portion 431.

[0094] Optionally, as shown in Figure 5 The number of the third extending portion 4323 is a plurality, and the plurality of third extending portions 4323 are arranged along the second direction. The rigidity of the plurality of parts of the heat exchange shell 420 in the second direction can be increased, and the rigidity of the plurality of parts of the two sealing portions 431 in the second direction can be increased, and the weight of the extending portion 432 is not too large, thereby facilitating the lightweight of the heat exchange member 400.

[0095] The extending direction of the third extending portion 4323 is not limited in the present disclosure, and as an embodiment, as shown in Figure 5As shown, the third extension part 4323 can be arranged obliquely, and each two adjacent third extension parts 4323 can be symmetric about the center of the line connecting the two in the second direction. In this way, the number of third extension parts 4323 can be increased without changing the number of third extension parts 4323, thereby increasing the positions of the heat exchange shell 420 that can be strengthened by the third extension part 4323 in the second direction, thereby facilitating the improvement of the rigidity of the heat exchange shell 420 in the second direction, and facilitating the lightweight of the heat exchange member 400.

[0096] As another embodiment of the present disclosure, the plurality of third extension parts 4323 can extend along the height direction of the battery pack 1000.

[0097] According to a second aspect of the present disclosure, a battery pack 1000 is provided, comprising a battery box 100, a battery module 200, and the above-mentioned filling assembly 600, the battery module 200 is arranged in the battery box 100, the battery module 200 has a gap 150 with the side beam 110 of the battery box 100, and the filling assembly 600 is filled in the gap 150.

[0098] As an embodiment, as shown in the drawings, Figure 3 As shown, the side beam 110 has a first connecting area 111 for abutting against the gel member 300, and the rigidity of at least part of the first connecting area 111 is less than the rigidity of the heat exchange member 400.

[0099] Since the expansion of the battery monomer 210 is not uniform, the expansion of the end face of the battery module 200 in the first direction is also not uniform, so the rigidity of at least part of the first connecting area 111 can be set to be greater than the rigidity of the gel member 300 corresponding to the area where the expansion of the end face of the battery module 200 or its battery monomer 210 in the first direction is greater, so that at least part of the first connecting area 111 can produce greater deformation than the heat exchange member 400 (the heat exchange member 400 can not produce deformation) to absorb the expansion of the battery module 200 and its battery monomer 210, and the heat exchange member 400 remains effectively attached to the battery module 200 during this process, thereby facilitating the reduction of the interface rigidity distortion of the battery module 200 and the battery monomer 210 at the end thereof in the first direction due to the incomplete contact surface with the heat exchange member 400, and thereby facilitating the reduction of the occurrence of the situation that the thickness of the lithium extraction of the winding core of the battery monomer 210 is inconsistent, thereby shortening the service life of the battery monomer 210.

[0100] Optionally, the area where the heat exchange member 400 abuts against the battery module 200 can be the second connecting area 410.

[0101] It can be understood that the rigidity of the heat exchange member 400 and the rigidity of at least part of the first connecting area 111 can be less than the rigidity of the heat exchange member 400.

[0102] Optionally, as shown in Figure 3 The first connecting region 111 includes a first middle connecting region 1111, and the heat exchange member 400 includes a second middle connecting region 411. In the height direction of the battery pack 1000, the first middle connecting region 1111 corresponds to the middle of the height direction of the battery module 200, and the second middle connecting region 411 corresponds to the middle of the height direction of the battery module 200. The rigidity of the first middle connecting region 1111 is less than the rigidity of the second middle connecting region 411.

[0103] In other words, the projection of the first middle connecting region 1111 in the first direction at least partially overlaps, such as only partially overlaps or completely overlaps, the projection of the middle of the battery module 200 in the first direction. The projection of the second middle connecting region 411 in the first direction at least partially overlaps, such as only partially overlaps or completely overlaps, the projection of the middle of the battery module 200 in the first direction. The projection of the first middle connecting region 1111 in the first direction at least partially overlaps, such as only partially overlaps or completely overlaps, the projection of the second middle connecting region 411 in the first direction.

[0104] Since the expansion of the battery module 200 is not uniform, and the position with the largest expansion degree of the battery module 200 is usually located in the middle of the height direction thereof, the rigidity of the side beam 110 corresponding to the middle region of the height direction of the battery module 200 (i.e., the first middle connecting region 1111) can be set to be less than the rigidity of the heat exchange member 400 corresponding to the middle region of the height direction of the battery module 200 (i.e., the second middle connecting region 411), so that the first middle connecting region 1111 can generate a larger deformation than the second middle connecting region 411 (the second middle connecting region 411 can not generate a deformation), thereby absorbing the expansion of the battery module 200 and its battery monomer 210, and facilitating the heat exchange member 400 to effectively adhere to the battery module 200 in the process, thereby obtaining the beneficial effects of the heat exchange member 400 effectively adhering to the battery module 200 in the embodiment in which the rigidity of the heat exchange member 400 is greater than the rigidity of the colloid member 300, which will not be described here.

[0105] Moreover, since the first middle connecting region 1111 is a local region of the side beam 110, and the second middle connecting region 411 is a local region of the heat exchange member 400, such a setting is also conducive to increasing the rigidity design range and material selection range of the side beam 110 and the heat exchange member 400 in other regions, thereby facilitating the further optimization of the side beam 110 and the heat exchange member 400.

[0106] In the embodiment in which the battery module 200 includes a plurality of stacked battery monomers 210, optionally, as shown in Figure 3As shown, the heat exchange member 400 is arranged between the large faces of each two adjacent battery monomers 210. In this way, on the one hand, the two large faces of each battery monomer 210 can be well heat-exchanged, thereby facilitating to improve the heat exchange efficiency of each battery monomer 210 and the temperature control ability of each battery monomer 210, thereby facilitating to improve the temperature uniformity of each battery monomer 210, and further facilitating to improve the performance of the battery module 200. On the other hand, the two large faces of each battery monomer 210 can be well abutted, thereby facilitating to improve the constraint ability of the expansion force of each battery monomer 210.

[0107] It can be understood that the large face of the battery monomer 210 can be a face surrounded by the edges extending along the length direction and the edges extending along the height direction of the battery monomer 210.

[0108] In order to improve the heat exchange efficiency of the battery module 200, as an embodiment, as shown in Figure 2 and Figure 3 shown, the battery pack 1000 further comprises a bottom plate heat exchange member 500, which is located in the battery box 100 and supports the bottom of the battery module 200.

[0109] The bottom of the battery module 200 can be heat-exchanged through the bottom plate heat exchange member 500, thereby facilitating to improve the heat exchange efficiency of the battery module 200. The battery monomer 210 can be bonded with the bottom plate heat exchange member 500 through the heat-conducting structural adhesive of the lower surface of the battery monomer 210. In the embodiment in which the heat exchange member 400 is arranged at both ends of the battery module 200 in the first direction, the two heat exchange members 400 and the bottom plate heat exchange member 500 can heat-exchange the battery module 200 from three sides, thereby not only facilitating to improve the heat exchange efficiency of the battery module 200, but also facilitating to improve the temperature uniformity of the battery module 200.

[0110] Especially in the embodiment in which the abutting surface of the heat exchange member 400 and the battery monomer 210 can be the large face of the battery monomer 210, the battery monomer 210 can obtain three main heat exchange surfaces with large areas, thereby greatly improving the instantaneous heat exchange ability of the battery monomer 210 and the consistency of the internal heat exchange of the battery monomer 210, and laying a safe foundation for the super-power battery monomer 210, thereby realizing larger rate fast charging and fast discharging.

[0111] The present disclosure does not limit the structure of the side beam 110, as an embodiment, as shown in Figure 3 the side beam 110 comprises a side beam 110 shell and an inner rib 113 arranged in the side beam 110 shell. In this way, the side beam 110 has sufficient rigidity and does not have too large weight, thereby facilitating the lightweight of the battery pack 1000.

[0112] As another embodiment of this disclosure, the side beam 110 may also be constructed as a solid structure.

[0113] Optionally, such as Figure 3 As shown, there are multiple inner ribs 113, which are spaced apart along the height direction of the side beam 110. The heat exchanger 400 and the colloidal component 300 are stacked along the first direction. Each inner rib 113 extends along the first direction. The two ends of the inner rib 113 in the first direction are respectively connected to the two inner sidewalls 423 of the side beam 110 shell that are opposite each other in the first direction. The heat exchanger 400 includes a second central connection area 411 (which may be the second central connection area 411 mentioned above). The second central connection area 411 corresponds to the middle of the height direction of the battery module 200. The second central connection area 411 is provided with multiple reinforcing ribs 430 (such as the second extension 4322 mentioned above) spaced apart along the height direction of the heat exchanger 400. Each reinforcing rib 430 extends along the first direction. In the height direction of the battery pack 1000, the inner ribs 113 and the reinforcing ribs 430 are staggered.

[0114] Since multiple inner ribs 113 are arranged at intervals along the height direction of the side beam 110, and the two ends of the inner ribs 113 in the first direction are respectively connected to the two inner sidewalls 423 opposite to each other in the first direction of the side beam 110 housing, the multiple inner ribs 113 can improve the rigidity of multiple parts of the side beam 110 housing in the height direction of the battery module 200, and the total weight of the inner ribs 113 is not too large.

[0115] Furthermore, since the area of ​​the side beam 110 with internal ribs 113 has higher stiffness than the interval area between its multiple internal ribs 113, and the area of ​​the heat exchanger 400 with reinforcing ribs 430 has higher stiffness than the interval area between its multiple reinforcing ribs 430, by staggering the arrangement of the internal ribs 113 and the reinforcing ribs 430, the interval area between its multiple internal ribs 113 can absorb the relative displacement of the area of ​​the heat exchanger 400 with reinforcing ribs 430 toward the side beam 110 through deformation, thereby allowing the expansion of the middle part of the battery module 200 in the height direction and facilitating the close fit between the heat exchanger 400 and the battery module 200.

[0116] The battery cell 210 has an EOL (End of Life) state, in which the battery cell 210 has reached the end of its service life and can no longer provide enough power to meet the needs of the device, and needs to be replaced. At this time, the maximum expansion deformation of one side of the battery cell 210 in the first direction is a.

[0117] Optionally, such as Figure 3As shown, the battery module 200 includes a plurality of battery cells 210 arranged in sequence along a first direction, the battery cells 210 having an EOL state in which: a deformation amount of a side of the heat exchange member 400 abutting against the battery module 200 in the first direction is b, a compression amount of the gel member 300 in the first direction is c, and a deformation amount of the side beam 110 in the first direction is d, wherein b, c, and d satisfy: 0.01 < b / c+d < 0.3.

[0118] The heat exchange member 400, the gel member 300, and the side beam 110 can be selected and designed according to the above relationship satisfied by b, c, and d, and adjusted to appropriate stiffness, for example, the compression curve of the gel member 300 is adjusted, the structure and position of the reinforcing ribs 430 in the heat exchange member 400 and the internal ribs 113 in the side beam 110 are adjusted, and appropriate stiffness differences are given to the three, so as to make as much as possible use of the compression amount of the gel member 300 in the first direction and the deformation amount of the side beam 110 in the first direction to absorb the unilateral expansion deformation amount of the battery cell 210 in the first direction, thereby reducing the deformation amount of the side of the heat exchange member 400 abutting against the battery module 200 in the first direction, thereby facilitating the guarantee of the structural integrity of the cavity 421 of the heat exchange member 400 in the entire life cycle of the battery cell 210, so that the heat exchange member 400 effectively adheres to the battery cell 210, thereby guaranteeing effective heat exchange between the heat exchange member 400 and the battery cell 210, and facilitating the battery cell 210 to be well constrained in the entire life cycle, thereby reducing the expansion amount of the battery cell 210.

[0119] For example, the heat exchange member 400, the gel member 300, and the side beam 110 can be selected and designed according to the above relationship of b, c, and d, so that the maximum unilateral expansion deformation amount a of the battery cell 210 in the first direction in the EOL state is ≤10mm.

[0120] It can be understood that it can be assumed that when the battery cell 210 is in an initial state, the unilateral expansion deformation amount of the battery cell 210 in the first direction, the deformation amount of the side of the heat exchange member 400 abutting against the battery module 200 in the first direction, the compression amount of the gel member 300 in the first direction, and the deformation amount of the side beam 110 in the first direction are all 0. When the battery cell 210 is in the EOL state, the values of a, b, c, and d can be obtained by measurement, wherein when the battery cell 210 is in the EOL state, the value of a is equal to the sum of b, c, and d.

[0121] According to a third aspect of the present disclosure, a power consuming device is provided, including a device body and the above-mentioned battery pack 1000, the battery pack 1000 being installed on the device body and used to supply power to the device body.

[0122] Optionally, the electric device can be a vehicle, or any other device suitable for using the battery pack 1000, and the present disclosure does not limit the same.

[0123] In the embodiment where the electric device is a vehicle, optionally, the vehicle body can be configured as the upper cover 140 of the battery pack 1000, which is arranged at the upper end of the side beam 110.

[0124] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0125] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

[0126] Furthermore, any combination of various different embodiments of the present disclosure can also be made, as long as it does not deviate from the idea of the present disclosure, and it should be considered as disclosed by the present disclosure.

Claims

1. A filling assembly, characterized by The filling assembly is adapted to fill the gap between the side beam of the battery box and the battery module; The filling assembly comprises a colloid member and a heat exchange member arranged in a stack; The side of the colloid member away from the heat exchange member is adapted to abut against the side beam, and the side of the heat exchange member away from the colloid member is adapted to abut against the battery module.

2. The filling assembly of claim 1, wherein, The rigidity of the heat exchange member at least in the middle region in the height direction is greater than the rigidity of the colloid member. The middle region of the heat exchange member corresponds to the middle part in the height direction of the battery module.

3. The filling assembly of claim 1, wherein, A flow channel is arranged in the heat exchange member, and the flow channel is used for the heat exchange medium to pass through for heat exchange with the battery module.

4. The filling assembly of claim 1, wherein, The heat exchange member is configured as a heat-conducting and heat-dissipating member.

5. The filling assembly of claim 4, wherein, The heat exchange member comprises a heat exchange shell and a reinforcing rib, the heat exchange shell has a cavity therein, and the reinforcing rib is arranged in the cavity.

6. The filling assembly of claim 5, wherein, The heat exchange shell comprises a bottom wall and two side walls connected to the bottom wall in a first direction, and the upper end of the heat exchange shell has a first opening; The reinforcing rib comprises a sealing portion and an extension portion; The sealing portion seals the first opening, and the extension portion is located inside the heat exchange shell.

7. The filling assembly of claim 6, wherein, The heat exchange shell further has two second openings, and the two second openings are oppositely arranged in a second direction; The extension portion comprises two first extension portions, and the upper ends of the two first extension portions are respectively connected to the sealing portion at both ends in the second direction; The first extension portion extends in the height direction of the battery pack, and the first extension portion is used for sealing the second opening.

8. The filling assembly of claim 7, wherein, The extension portion further comprises at least one second extension portion; The second extension portion is respectively connected to the corresponding first extension portion at both ends in the second direction.

9. The filling assembly of claim 8, wherein, The number of the second extension portions is plural, and the plural second extension portions are arranged at intervals in the height direction of the battery pack; In the height direction of the battery pack, the region defined between the uppermost second extension portion and the lowermost second extension portion corresponds to the middle part in the height direction of the battery module.

10. The filling assembly of claim 6, wherein, The extension portion comprises at least one third extension portion, the upper end of the third extension portion is connected to the sealing portion, and the lower end of the third extension portion is connected to the bottom wall.

11. A battery pack, characterized by The battery pack comprises a battery box, a battery module, and a filling assembly according to any one of claims 1-10; The battery module is arranged in the battery box, and the battery module has the gap with the side beam of the battery box; The filling assembly fills in the gap.

12. The battery pack of claim 11, wherein, The side beam has a first connection area for abutting against the colloid member, and the rigidity of at least part of the first connection area is less than the rigidity of the heat exchange member.

13. The battery pack of claim 12, wherein, The first connection area comprises a first middle connection area, and the heat exchange member comprises a second middle connection area; In the height direction of the battery pack, the first middle connection area corresponds to the middle part in the height direction of the battery module, and the second middle connection area corresponds to the middle part in the height direction of the battery module; The rigidity of the first middle connection area is less than the rigidity of the second middle connection area.

14. The battery pack of any one of claims 11-13, wherein, The battery pack further comprises a bottom plate heat exchange member, and the bottom plate heat exchange member is arranged in the battery box and supports the bottom of the battery module.

15. The battery pack of any one of claims 11-13, wherein, The side beam comprises a side beam shell and an inner rib arranged in the side beam shell.

16. The battery pack of claim 15, wherein, The number of the inner ribs is multiple, and the multiple inner ribs are arranged at intervals along the height direction of the side beam. The heat exchange member and the gel member are arranged in a stack along a first direction, each of the inner ribs extends along the first direction, and the inner ribs are connected to two inner side walls of the side beam shell located at opposite ends of the first direction. The heat exchange member comprises a second middle connecting area corresponding to the middle of the height direction of the battery module, and the second middle connecting area is provided with multiple reinforcing ribs arranged at intervals along the height direction of the heat exchange member, and each reinforcing rib extends along the first direction. In the height direction of the battery pack, the inner ribs are arranged in a staggered manner with the reinforcing ribs.

17. An electrical device, characterized by The device body and the battery pack according to any one of claims 11-16 are included, the battery pack is installed on the device body, and is used to supply power to the device body.

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