Filling piece, battery pack and electric equipment

Abstract

The utility model relates to a filling piece, a battery pack and electric equipment. The filling piece is suitable for being arranged in a filling space between a battery cell group of the battery pack and the side wall of the battery tray; the filling piece is provided with an avoiding part, and the avoiding part is used for avoiding an electric connecting piece of the battery pack. According to the battery pack, the filling piece can achieve the effect of one piece with two purposes, the binding force can be provided for the battery cell group, the electric connecting piece can be avoided through the avoiding part, the risk of interference between the filling piece and the electric connecting piece and the risk of interference between the electric connecting piece and other parts of the battery pack are reduced, and meanwhile, the occupied space of the filling piece in the battery pack can be reduced.

Description

Technical Field

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

[0002] Nowadays, new energy vehicles are usually equipped with multiple different range versions on the same model for consumers to choose from. The number of cells in the battery packs of different range versions is also different. Usually, the connection points and positions of the battery packs of the same model are the same. Therefore, the battery packs of different range versions can be designed with the same outer frame, so that important components such as battery trays, cold plates and sealing covers can be shared.

[0003] In order to assemble the battery cell group into the battery tray of the battery pack, an assembly gap (which may be called a filling space) is usually reserved between the side beams of the battery cell group and the battery tray. In the related art, a filling piece is placed in the filling space to provide a restraining force to the battery cell group. However, the existing filling piece has the problem of occupying a large space and easily interfering with the electrical connector. Utility Model Content

[0004] The purpose of the present disclosure is to provide a filling piece, a battery pack and an electrical device to solve at least one of the above-mentioned technical problems.

[0005] In order to achieve the above-mentioned object, the present disclosure provides a filling piece, which is suitable for being arranged in a filling space between a cell group of a battery pack and a side wall of a battery tray;

[0006] The filling piece is provided with an escape portion, and the escape portion is used to escape the electrical connector of the battery pack.

[0007] Optionally, the avoidance portion is provided at at least one of the two opposite ends of the filling piece.

[0008] Optionally, the side of the filling piece located in the first direction is suitable for being connected to the battery cell group, and the avoidance portion is constructed as a first avoidance channel penetrating the filling piece along the first direction.

[0009] Optionally, an outer surface portion of the filling piece in a second direction is recessed to form the first avoidance channel, and the second direction intersects with the first direction.

[0010] Optionally, the first avoidance channel includes a first avoidance surface and a second avoidance surface; one end of the first avoidance surface located in the second direction is connected to one end of the second avoidance surface located in the third direction, the other end of the first avoidance surface located in the second direction extends to the surface of the filler located in the second direction, and the other end of the second avoidance surface located in the third direction extends to the end wall of the filler located in the third direction; wherein, the third direction intersects with the plane defined by the first direction and the second direction.

[0011] Optionally, the third direction is perpendicular to the first direction, and the first avoidance surface is perpendicularly connected to the second avoidance surface.

[0012] Optionally, the filling piece has an abutting plane suitable for connecting with the battery cell group.

[0013] Optionally, a cavity is provided in the filling piece.

[0014] Optionally, the filling piece has a first side and a second side opposite to each other along a first direction; the first side is suitable for connecting to the battery cell group, and the second side is suitable for connecting to the side wall of the battery tray; the cavity has an opening extending to the second side and / or the first side.

[0015] Optionally, a partition structure is fixed in the cavity, the partition structure divides the cavity into a plurality of weight-reducing cavities, and the partition structure at least partially extends along the first direction.

[0016] Optionally, the partition structure includes a plurality of arc-shaped portions, the plurality of arc-shaped portions are arranged at intervals, each of the arc-shaped portions extends along the first direction, and one end of the arc-shaped portion located in the first direction is connected to a surface of the filler for connecting with the battery cell group;

[0017] The partition structure further includes a plurality of first ribs, which are arranged along the second direction of the filler and connected between the cavity wall and the convex surface of the corresponding arc-shaped portion, or the first ribs are connected between the convex surfaces of two corresponding arc-shaped portions, and the second direction intersects the first direction; and / or,

[0018] The partition structure further includes a plurality of second ribs, which are arranged along a third direction of the filler and connected between the cavity wall and the convex surface of the corresponding arc-shaped portion, or the second ribs are connected between the convex surfaces of two corresponding arc-shaped portions, and the third direction intersects with the first direction; and / or,

[0019] The partition structure further includes a third rib plate, which is arranged obliquely, and two ends of the third rib plate are respectively connected between two corresponding arc-shaped portions.

[0020] Optionally, the cross-section of some of the arc-shaped portions in the plurality of arc-shaped portions perpendicular to the first direction is annular.

[0021] Optionally, the sum of the volumes occupied by the plurality of weight-reducing cavities forms a hollow volume, and the hollow volume accounts for 60% to 80% of the overall volume of the filling piece.

[0022] Optionally, the area of the outer contour of the cross section of the filling piece perpendicular to the first direction is the initial cross-sectional area, and the area of the cross section of the filling piece perpendicular to the first direction is the remaining cross-sectional area, and the remaining cross-sectional area accounts for 20% to 40% of the initial cross-sectional area.

[0023] Optionally, the filling piece is an integrally formed piece.

[0024] Optionally, the filling piece is made of insulating material.

[0025] According to a second aspect of the present disclosure, there is provided a battery pack comprising a battery tray, a battery cell group, an electrical connector, and the aforementioned filler;

[0026] The battery tray has a receiving cavity, the battery cell group and the filling member are both arranged in the receiving cavity, and the filling space is formed between the battery cell group and the side wall of the battery tray;

[0027] The electrical connector is passed through the avoidance portion.

[0028] Optionally, there are multiple battery cell groups, and the filling piece is provided on at least one side of each battery cell group located in the first direction, the avoidance portion extends along the first direction, and multiple battery cell groups are arranged at intervals along a third direction, and the third direction intersects with the first direction; the electrical connector includes two first sections and a second section connecting the two first sections, one first section is located in the avoidance portion of one of the two filling pieces adjacent to each other in the third direction, and the other first section is located in the avoidance portion of the other of the two filling pieces adjacent to each other in the third direction.

[0029] Optionally, the battery tray includes a base plate, side beams and partition beams, the side beams are fixed on the edge of the base plate to define an installation cavity, the partition beams are arranged in the installation cavity to divide the installation cavity into a plurality of accommodating cavities; a second avoidance channel is opened on the partition beam, and the second section is passed through the second avoidance channel.

[0030] Optionally, the second avoidance channel is a notch provided at the end of the partition beam in the first direction.

[0031] Optionally, the filling space is formed between the side walls of the battery cell group constructed by the large surfaces of the battery cells and the side walls of the battery tray.

[0032] According to a third aspect of the present disclosure, there is provided an electrical device comprising a device body and the above-mentioned battery pack, wherein the battery pack is mounted on the device body and is suitable for supplying power to the device body.

[0033] With the above technical solution, the filler, once positioned within the filling space, can abut against the battery cells, providing restraint for the cell pack. Furthermore, the provision of a relief portion on the filler can reduce its volume and the space it occupies within the battery pack. Furthermore, the presence of the relief portion allows some electrical connectors to be located within the relief portion, thus reducing the risk of interference between the filler and the electrical connector, as well as the risk of interference between the electrical connector and other components of the battery pack.

[0034] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0036] Figure 1 is a schematic diagram of the three-dimensional structure of a filling piece provided by an exemplary embodiment of the present disclosure;

[0037] Figure 2 is a schematic end view of one end of a filler connected to a battery cell group provided by an exemplary embodiment of the present disclosure;

[0038] Figure 3 1 is a schematic diagram of the installation structure of a battery cell group on a battery tray according to an exemplary embodiment of the present disclosure;

[0039] Figure 4 1 is a schematic diagram of the installation structure of a battery cell group and a filler on a battery tray provided by an exemplary embodiment of the present disclosure;

[0040] Figure 5 This is a schematic diagram of the installation structure of a battery cell group, a filling member, and an electrical connector on a battery tray provided by an exemplary embodiment of the present disclosure;

[0041] Figure 6 Schematic diagram of an exploded view of a battery pack provided in accordance with an exemplary embodiment of the present disclosure.

[0042] Description of Reference Numerals

[0043] 10-battery pack;

[0044] 100 - filling member; 101 - abutting plane; 102 - connecting plane; 110 - avoidance portion; 111 - first avoidance surface; 112 - second avoidance surface; 120 - first avoidance channel; 130 - cavity; 131 - weight-reducing cavity; 140 - partition structure; 141 - first rib plate; 142 - second rib plate; 143 - arc portion; 144 - third rib plate;

[0045] 200 - battery tray; 201 - receiving cavity; 202 - battery cell receiving space; 203 - filling space; 204 - power distribution space; 210 - bottom plate; 220 - side beam; 230 - separation beam; 231 - second avoidance channel;

[0046] 300-cell pack;

[0047] 400-electrical connector; 410-first section; 420-second section;

[0048] 500-battery cover;

[0049] 600-Structural adhesive. DETAILED DESCRIPTION

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

[0051] In the description of the present disclosure, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the drawings (such as Figure 2 ) are defined solely for the purpose of facilitating and simplifying the description of the present disclosure. They do not indicate or imply that the devices or elements referred to must have a specific orientation, structure, or operation in a specific orientation. Therefore, they should not be construed as limiting the present disclosure. Furthermore, the terms "inside" and "outside" refer to the inside and outside of the corresponding structural outlines. Furthermore, the terms "first," "second," and the like are used solely to distinguish one element from another and do not convey sequential or significant meaning. For example, the first direction X, the second direction Z, and the third direction Y are used solely to distinguish one element from another and do not convey sequential or significant meaning.

[0052] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed," "connected," "connected," and "installed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections via an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on specific circumstances.

[0053] As mentioned above, in the related art, the fillers used have the problem of occupying a large space and easily interfering with the electrical connectors.

[0054] In view of this, if Figures 1 to 6 As shown, the present disclosure provides a filling piece 100 in a first aspect, which is suitable for being arranged in a filling space 203 between the battery cell group 300 of the battery pack 10 and the side wall of the battery tray 200. The filling piece 100 is provided with an avoidance portion 110, and the avoidance portion 110 is used to avoid the electrical connector 400 of the battery pack 10. Among them, the electrical connector 400 can be a connector between adjacent battery cell groups 300 connected in series, and / or, the electrical connector 400 can be a connector that electrically connects the battery cell group 300 to the power distribution structure of the battery pack 10. That is, the electrical connector 400 can be a connector between adjacent battery cell groups 300 connected in series, the electrical connector 400 can also be a connector that electrically connects the battery cell group 300 to the power distribution structure of the battery pack 10, and the electrical connector 400 can also be a connector used to connect other components, which is not limited by the present disclosure.

[0055] Through the above solution, the filler 100, when positioned within the filling space 203, can abut against the battery cells, providing a restraining force for the battery pack 300. Furthermore, the provision of the relief portion 110 on the filler 100 can reduce the volume of the filler 100 and the space it occupies within the battery pack 10. Furthermore, the presence of the relief portion 110 allows a portion of the electrical connector 400 to be positioned within the relief portion 110, thereby reducing the risk of interference between the filler 100 and the electrical connector 400, as well as the risk of interference between the electrical connector 400 and other components of the battery pack 10. For example, in a filler without the relief portion 110, a portion of the electrical connector 400 would need to be positioned above the filler. This could result in the electrical connector 400 being higher than the height of the battery pack 300, potentially preventing the battery cover 500 of the battery pack 10 from sealingly connecting with the battery tray 200. However, the provision of the relief portion 110 prevents the electrical connector 400 from being raised above the height of the battery pack 300. In this way, in the present disclosure, the filler 100 can serve a dual purpose, providing a restraining force to the battery cell group 300, and avoiding the electrical connector 400 through the avoidance portion 110, thereby reducing the risk of interference between the filler 100 and the electrical connector 400, and between the electrical connector 400 and other components of the battery pack 10. At the same time, the space occupied by the filler 100 in the battery pack 10 can be reduced.

[0056] It should be noted that the electrical connector 400 may be a connector bar, a metal connector, a wiring harness, or other electrical connectors, which is not specifically limited in this disclosure. The power distribution structure of the battery pack 10 may be a high-voltage distribution box, etc., which is not specifically limited in this disclosure.

[0057] In some optional embodiments, such as Figure 1 As shown, at least one of the two opposite ends of the filler 100 is provided with an escape portion 110, for example, Figures 1 to 5 As shown, at least one of the two opposite ends of the filling piece 100 in the third direction Y is provided with an escape portion 110 .

[0058] When the avoidance portion 110 is provided at one of the opposite ends of the filler 100, the installation direction of the filler 100 can be adjusted according to the position of the electrical connector 400 within the battery pack 10, so that the avoidance portion 110 on the filler 100 can avoid the electrical connector 400. Of course, when the avoidance portion 110 is provided at both opposite ends of the filler 100, the installation direction of the filler 100 does not need to be adjusted, so that the filler 100 has a foolproof function when it is used with the electrical connector 400.

[0059] In some optional embodiments, the filling piece 100 is located on one side of the first direction X and is suitable for connecting with the battery cell group 300 , and the avoidance portion 110 is configured as a first avoidance channel 120 that penetrates the filling piece 100 along the first direction X.

[0060] The avoidance portion 110 is configured as a first avoidance channel 120 penetrating the filling member 100 , which can facilitate the arrangement of the electrical connectors 400 and also enable the avoidance portion 110 to avoid more electrical connectors 400 .

[0061] It should be noted that the first avoidance channel 120 can be set at any position of the filling member 100, for example, in the height direction of the filling member 100 (such as Figure 1 The second direction Z) can be located at the top, the middle and the bottom, and this disclosure does not make any specific limitation on this.

[0062] In addition, it can be understood that the first avoidance channel 120 can be set inside the filling piece 100, or can be set on the outer surface of the filling piece 100, that is, the first avoidance channel 120 can be formed by partially recessing the outer surface of the filling piece 100.

[0063] In some optional embodiments, such as Figure 1 and Figure 2 As shown, the outer surface of the filling piece 100 located in the second direction Z is partially recessed to construct a first avoidance channel 120 , and the second direction Z intersects with the first direction X.

[0064] By setting the first avoidance channel 120 on the outer surface of the filling piece 100, it is convenient to process the first avoidance channel 120, and it is also easier to place part of the structure of the electrical connector 400 in the first avoidance channel 120, so that the avoidance portion 110 can avoid the electrical connector 400.

[0065] It is understood that the second direction Z here can be when the filler 100 is in the installed state (see Figure 1 and Figure 2 ) in the up and down direction or the left and right direction, which is not limited in the present disclosure. In other words, the first avoidance channel 120 can be located in the filling member 100 such as Figure 2 The upper surface or lower surface of the figure shown can also be located on the filler 100 as shown in FIG. Figure 2 The left or right surface of the drawing shown.

[0066] In some embodiments, as Figure 1 and Figure 2 As shown, the first avoidance channel 120 can be located on the upper surface of the filling piece 100. In other words, part of the upper surface of the filling piece 100 is recessed downward. The first avoidance channel 120 is constructed by recessing part of the upper surface of the filling piece 100 downward, so that the first avoidance channel 120 opens upward. Therefore, after the filling piece 100 is installed in the filling space 203, it is further convenient to place part of the structure of the electrical connector 400 in the first avoidance channel 120.

[0067] Regarding the specific structure of the first avoidance channel 120, as shown in FIG. Figure 1 As shown, in some optional embodiments, the avoidance portion 110 includes a first avoidance surface 111 and a second avoidance surface 112; the first avoidance surface 111 is located at one end of the second direction Z (such as Figure 2 The lower end of the drawing direction as shown) and the second avoidance surface 112 is located at one end of the third direction (as shown Figure 2 The other end of the first avoidance surface 111 in the second direction Z extends to the surface of the filler 100 in the second direction Z, and the other end of the second avoidance surface 112 in the third direction extends to the end wall of the filler 100 in the third direction Y. The third direction X intersects the plane defined by the first direction X and the second direction Z. For example, see Figure 2 The upper end of the first escape surface 111 extends upward to the upper surface of the filler 100, and the other end of the second escape surface 112 in the left-right direction extends to the left or right end wall of the filler 100. This configuration allows the first escape channel 120 of the escape portion 110 to have openings in both the intersecting second direction Z and the third direction Y, making it more convenient to place the electrical connector 400.

[0068] In the disclosure, the third direction Y intersects both the first direction X and the second direction Z, the third direction Y intersects (e.g., is perpendicular to) the plane defined by the first direction X and the second direction Z, and the first direction X, the second direction Z, and the third direction Y are relative. For example, Figure 2In the drawing shown, when the first direction X is perpendicular to the drawing, the second direction Z can be the up-down direction of the drawing (the up-down direction of the filler 100 ), and the third direction Y can be the left-right direction of the drawing (the left and right direction of the filler 100 ).

[0069] The first avoidance surface 111 and the second avoidance surface 112 may have any appropriate angle. In some optional embodiments, the third direction Y is perpendicular to the first direction X, and the first avoidance surface 111 is perpendicular to the second avoidance surface 112 .

[0070] Arranging the second relief surface 112 along the third direction Y, which is perpendicular to the first direction, facilitates a horizontal arrangement of the second relief surface 112. This horizontal arrangement provides more stable support for the electrical connector 400. The vertical connection of the first and second relief surfaces 111, 112 allows the first relief surface 111 to be vertically positioned, making it easier to remove the electrical connector 400.

[0071] In order to make the filler 100 provide better restraint for the battery cell group 300, as shown in FIG. Figure 1 and Figure 2 As shown, in some optional embodiments, the filling piece 100 has an abutting plane 101 suitable for connecting with the battery cell group 300 .

[0072] One end of the filling piece 100 connected to the battery cell group 300 is set as an abutting plane 101, so that the filling piece 100 can achieve surface contact with the battery cell group 300, thereby having a larger abutting area and providing better restraint force.

[0073] The inclination angle of the abutting plane 101 can be set accordingly based on the inclination angle of the surface of the battery cell group 300 that abuts the abutting plane 101, and this disclosure does not impose any specific limitations on this. In some optional embodiments, after the filler 100 is installed in the filling space 203, the abutting plane 101 is parallel to the vertical surface, that is, the abutting plane 101 is perpendicular to the second avoidance surface 112, and the inclination angle of the abutting plane 101 is 0.

[0074] Understandably, in Figure 1 In the illustrated filling member 100 , the end of the filling member 100 connected to the battery cell group 300 may be an end in the first direction X in the figure.

[0075] It should be noted that the shape of the side of the filler 100 connected to the side wall of the battery tray 200 can be adapted to the shape of the side wall of the battery tray 200, so that the side of the filler 100 connected to the side wall of the battery tray 200 has a larger contact area with the corresponding side wall of the battery tray 200. When the side wall of the battery tray 200 is flat, the filler 100 has a connecting surface 102 suitable for connecting to the side wall of the battery tray 200.

[0076] Optionally, the connecting plane 102 is parallel to the abutting plane 101 .

[0077] In some optional embodiments, such as Figure 1 As shown, a cavity 130 is provided in the filling member 100. Providing the cavity 130 can reduce the weight of the filling member 100, and further reduce the weight of the battery pack 10 after the filling member 100 is installed in the battery pack 10.

[0078] In some optional embodiments, the filler 100 has a first side and a second side relative to each other along the first direction X; the first side is suitable for connecting to the battery cell group 300, and the second side is suitable for connecting to the side wall of the tray, and the cavity 130 has an opening extending to the second side and / or the first side, that is, the opening of the cavity 130 can extend only to the first side, or only to the second side, or extend to the first side and the second side respectively (the cavity 130 can have openings on both sides of the first direction X).

[0079] The cavity 130 has an opening extending to the second side and / or the first side, so that the cavity 130 can be formed through the opening, which makes it easier to process the cavity 130. For example, the cavity 130 and the opening can be formed by drilling or boring the second end of the filler 100.

[0080] It can be understood that the first side of the filling piece 100 may be the side where the abutting plane 101 is located, and the second side of the filling piece 100 may be the side where the connecting plane 102 is located.

[0081] In some optional embodiments, such as Figure 1 A partition structure 140 is fixed within the cavity 130 , dividing the cavity 130 into a plurality of weight-reducing chambers 131 . The partition structure 140 extends at least partially along the first direction X. With this design, the partition structure 140 disposed within the cavity 130 can provide support for the cavity 130 of the filler 100 , thereby improving the filler 100 's ability to resist deformation and preventing the filler 100 's surface from concavely deforming toward the cavity 130 under the action of external forces.

[0082] It should be noted that the partition structure 140 can be fixed within the cavity 130 by being integrally formed with the filler 100, i.e., by providing a weight-reducing cavity 131 in the filler 100, with the cavity walls of the weight-reducing cavity 131 forming the partition structure 140. Alternatively, the partition structure 140 can be fixed to the filler 100 via a fixing structure. For example, after providing the cavity 130 in the filler 100, the partition structure 140 is placed into the cavity 130 and fixed to the filler 100 via a fixing structure. The fixing structure herein includes, but is not limited to, any other fixing structure, such as bonding, clamping, and welding.

[0083] The specific structure of the separation structure 140 can be any structure and is not specifically limited in this disclosure.

[0084] In some optional embodiments, such as Figure 1 As shown, the partition structure 140 includes a plurality of arc-shaped portions 143, and the plurality of arc-shaped portions 143 are arranged at intervals, each arc-shaped portion 143 extends along the first direction X, and the arc-shaped portion 143 is located at one end of the first direction X and is connected to the surface of the filler 100 for connecting with the battery cell group 300; the partition structure 140 may also include a plurality of first ribs 141, and the first ribs 141 are arranged along the second direction X of the filler 100 (such as the height direction of the filler 100), and the first ribs 141 are connected between the cavity wall of the cavity 130 and the convex surface of the corresponding arc-shaped portion 143, or, the first ribs 141 are connected between the convex surfaces of two corresponding arc-shaped portions 143. The first rib 141 is arranged along the second direction X of the filling piece 100, and at least one end of the first rib 141 is connected to the convex surface of the corresponding arc-shaped portion 143. When the filling piece 100 is subjected to an inward extrusion force at either end in the second direction X, the extrusion force is transmitted to the convex surface of the arc-shaped portion 143. Since the convex surface of the arc-shaped portion 143 constitutes an arch structure, it has greater compressive resistance. Therefore, the filling piece 100 has a stronger compressive resistance in the second direction X (such as the height direction of the filling piece 100).

[0085] like Figure 1 As shown, the partition structure 140 also includes a plurality of second ribs 142, which are arranged along the third direction Y of the filling piece 100 (such as the length direction of the filling piece 100), and the second ribs 142 are connected between the cavity wall of the cavity 130 and the convex surface of the corresponding arc-shaped portion 143, or the second ribs 142 are connected between the convex surfaces of two corresponding arc-shaped portions 143.

[0086] The second rib 142 is arranged along the third direction Y of the filling piece 100, and one straight end of the second rib 142 is connected to the convex surface of the corresponding arc-shaped portion 143. When the filling piece 100 is subjected to an inward extrusion force at either end in the third direction Y, the extrusion force is transmitted to the convex surface of the arc-shaped portion 143, so that the filling piece 100 has a stronger pressure resistance in the third direction Y (the length direction of the filling piece 100).

[0087] Understandably, in Figure 1 In the filling piece 100 shown, the width direction of the filling piece 100 may be the first direction X shown in the figure.

[0088] In some optional embodiments, such as Figure 1 As shown, the partition structure 140 further includes a third rib 144 . The third rib 144 is arranged obliquely, and both ends of the third rib 144 are respectively connected between two corresponding arc-shaped portions 143 .

[0089] An inclined third rib 144 is provided, and both ends of the third rib 144 are respectively connected between two corresponding arc-shaped portions 143 , so that the filling piece 100 has a stronger compression resistance when subjected to an extrusion force in an inclined direction.

[0090] In some optional embodiments, the cross-section of some of the arc-shaped portions 143 in the plurality of arc-shaped portions 143 perpendicular to the first direction X is annular.

[0091] If the cross section of part of the arc-shaped portion 143 is in the shape of a ring, the first rib 141, the second rib 142 and the third rib 144 can be connected to any position of the outer wall of the arc-shaped portion 143 with a ring-shaped cross section, and a convex connection with the arc-shaped portion 143 can be achieved. The arc-shaped portion 143 can be used to improve the compressive resistance in the corresponding direction.

[0092] It is understood that in other embodiments of the present disclosure, the partition structure 140 may not have the same Figure 1 As shown in the arcuate portion 143 , for example, in this embodiment, the partition structure 140 may only have transverse ribs and / or vertical ribs, or only include ribs in the shape of a cross.

[0093] In some optional embodiments, the sum of the volumes occupied by the multiple weight-reducing cavities 131 forms a hollow volume, and the hollow volume accounts for 60% to 80% of the overall volume of the filler 100. This configuration enables the filler 100 to obtain a larger hollow volume while ensuring strength and deformation, thereby making the filler 100 lighter.

[0094] It should be pointed out that the hollow volume accounts for 60% to 80% of the overall volume of the filler 100 , which can be obtained by topological simulation, simulating the force of the expansion force of the battery cell acting on the filler 100 .

[0095] In some optional embodiments, the area of the outer contour of the cross section of the filling member 100 perpendicular to the first direction X is the initial cross-sectional area, and the area of the cross section of the filling member 100 perpendicular to the first direction X is the residual cross-sectional area, with the residual cross-sectional area accounting for 20% to 40% of the initial cross-sectional area. This configuration enables the filling member 100 to obtain a larger hollowed volume while ensuring strength and deformation, thereby making the filling member 100 lighter.

[0096] In some optional embodiments, the filling piece 100 is an integrally formed piece, that is, the partition structure 140 and the filling piece 100 are integrally formed.

[0097] The material of the filler 100 can be any material, and the present disclosure does not make any specific restrictions. In some optional embodiments, the material of the filler 100 is an insulating material. By using an insulating material as the filler 100, the filler 100 can be directly attached to the battery cell group 300, and no additional insulation treatment is required between the filler 100 and the battery cell group 300, thereby improving the efficiency of the assembly of the battery pack 10. At the same time, since the entire filler 100 is made of insulating material, insulation failure will not occur, and therefore, the risk of high-voltage arcing in the battery pack 10 can also be reduced.

[0098] Optionally, the insulation material is an integrated autoclave foamed MPPO block.

[0099] Based on the above-mentioned filling piece 100, as Figures 3 to 6 As shown, the present disclosure further provides a battery pack 10 in the second aspect, which includes a battery tray 200, a battery cell group 300, an electrical connector 400 and the above-mentioned filling piece 100; the battery tray 200 has a accommodating cavity 201, the battery cell group 300 and the filling piece 100 are both arranged in the accommodating cavity 201, and a filling space 203 is formed between the battery cell group 300 and the side wall of the battery tray 200; the electrical connector 400 is arranged in the avoidance portion 110.

[0100] After the above-mentioned filling piece 100 and battery cell group 300 are installed in the battery pack 10, the avoidance portion 110 on the filling piece 100 can be used to avoid the electrical connector 400, so that the electrical connector 400 passes through the avoidance portion 110 to connect to the adjacent battery cell group 300, and / or, the electrical connector 400 passes through the avoidance portion 110 to connect the battery cell group 300 and the power distribution node of the battery pack 10, or the electrical connector 400 can pass through the avoidance portion 110 to connect other components.

[0101] It should be noted that in some optional embodiments, the portion of the space within the accommodating cavity 201 used to accommodate the battery cell group 300 is a pre-set battery cell accommodating space 202. The battery cell group 300 is installed in the battery cell accommodating space 202 to facilitate installation of the battery cell group 300 within the accommodating cavity 201. A power distribution space 204 is also formed between the battery cell group 300 and the sidewalls of the battery tray 200. The power distribution space 204 is used to accommodate connectors or power distribution components between the multiple battery cells in the battery cell group 300. It is understood that the battery cell accommodating space 202 and the power distribution space 204 are both components of the accommodating cavity 201.

[0102] In some optional embodiments, such as Figure 6 As shown, the battery pack 10 also includes a battery cover 500, which is detachably and sealedly connected to the battery tray 200, and the battery cover 500 is covered in the accommodating cavity 201, so that the interior of the battery pack 10 forms a relatively sealed structure through the battery cover 500 and the battery tray 200.

[0103] In some optional embodiments, a structural adhesive 600 is provided on the end surface of the filling piece 100 in the height direction, and the filling piece 100 and the battery cover 500 are bonded and fixed by the structural adhesive 600.

[0104] In some optional embodiments, such as Figure 5 As shown, there are multiple battery cell groups 300, and the multiple battery cell groups 300 are arranged at intervals along the third direction. A filler 100 is provided on at least one side of each battery cell group 300 located in the first direction, and the avoidance portion 110 extends along the first direction; the electrical connector 400 includes two first sections 410 and a second section 420 connecting the two first sections 410, one of the two first sections 410 is located in the avoidance portion 110 of one of the two fillers 100 adjacent to each other in the third direction, and the other first section 410 of the two first sections 410 is located in the avoidance portion 110 of the other of the two fillers 100 adjacent to each other in the third direction.

[0105] The filling pieces 100 on the same side of two adjacent battery cell groups 300 are also adjacent. The two first sections 410 of the electrical connector 400 are respectively used to connect the two adjacent battery cell groups 300. The two first sections 410 are respectively located on the avoidance portions 110 of the two adjacent filling pieces 100 and are connected through the second section 420. In this way, the electrical connector 400 is generally arranged in a U-shape, and part of the electrical connector 400 is located in the filling space 203. In this way, the risk of interference between the electrical connector 400 and other components of the battery pack 10 is reduced.

[0106] In some optional embodiments, the battery tray 200 includes a bottom plate 210, side beams 220, and a separator beam 230. The side beams 220 are fixed to the edges of the bottom plate 210 to define a mounting cavity. The separator beams are disposed within the mounting cavity to divide the mounting cavity into a plurality of accommodating cavities 201. The separator beam 230 defines a second avoidance channel 231, and the second section 420 extends through the second avoidance channel 231.

[0107] When a partition beam 230 is installed in the battery pack 10, a second avoidance channel 231 is provided on the partition beam 230, allowing the second section 420 to pass through the second avoidance channel 231, while the two first sections 410 are respectively located in the accommodating cavities 201 on both sides of the partition beam 230. This prevents the electrically connected second section 420 from interfering with other components of the battery pack 10 when the partition beam 230 is located.

[0108] It should be noted that the second escape channel 231 can be located at the top, middle, or bottom of the partition beam 230, and this disclosure does not impose any specific limitations on this. Optionally, the second escape channel 231 is located at a height substantially the same as the first escape channel 120, to facilitate the passage of the electrical connector 400 through the first escape channel 120 and the second escape channel 231 to connect adjacent battery cell groups 300.

[0109] In some optional embodiments, the second avoidance channel 231 is a notch provided at the end of the partition beam 230 located in the first direction X. The second avoidance channel 231 in the form of a notch can form an opening at the top of the partition beam 230 to more conveniently place the electrical connector 400 through the notch into the second avoidance channel 231 .

[0110] In some optional embodiments, a filling space 203 is formed between the sidewalls formed by the large surfaces of the battery cells in the battery cell group 300 and the sidewalls of the battery tray 200. After the filler 100 is placed in the filling space 203, the filler 100 can be brought into contact with the large surfaces of the battery cells, thereby increasing the contact area between the filler 100 and the battery cells and further preventing the battery cells from expanding and deforming.

[0111] Based on the above-mentioned battery pack 10, the present disclosure further provides an electrical device in a third aspect. The electrical device includes a device body and an upper battery pack 10. The battery pack 10 is installed on the device body and is suitable for supplying power to the device body.

[0112] Here, electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc., and the present disclosure does not limit this. The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, the technical solutions of the present disclosure can be modified in a variety of simple ways, and these simple modifications all fall within the scope of protection of the present disclosure.

[0113] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0114] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A filling piece, characterized in that: The filling member is suitable for being arranged in the filling space between the battery cell group of the battery pack and the side wall of the battery tray; The filling piece is provided with an escape portion, and the escape portion is used to escape the electrical connector of the battery pack.

2. The filling piece according to claim 1, characterized in that The avoidance portion is provided at at least one of the two opposite ends of the filling piece.

3. The filling piece according to claim 1, wherein: The side of the filling piece located in the first direction is suitable for being connected to the battery cell group, and the avoidance portion is constructed as a first avoidance channel that penetrates the filling piece along the first direction.

4. The filling piece according to claim 3, characterized in that The outer surface of the filling piece in a second direction is partially recessed to form the first avoidance channel, and the second direction intersects with the first direction.

5. The filling piece according to claim 4, characterized in that The first avoidance channel includes a first avoidance surface and a second avoidance surface; One end of the first avoidance surface in the second direction is connected to one end of the second avoidance surface in the third direction, the other end of the first avoidance surface in the second direction extends to the surface of the filler in the second direction, and the other end of the second avoidance surface in the third direction extends to the end wall of the filler in the third direction; The third direction intersects a plane defined by the first direction and the second direction.

6. The filling piece according to claim 5, characterized in that The third direction is perpendicular to the first direction, and the first avoidance surface is perpendicularly connected to the second avoidance surface.

7. The filling piece according to claim 1, characterized in that The filling piece has an abutting plane suitable for connecting with the battery cell group.

8. The filling piece according to any one of claims 1 to 7, characterized in that: A cavity is provided in the filling piece.

9. The filling piece according to claim 8, characterized in that The filler has a first side and a second side opposite to each other along a first direction; The first side is adapted to be connected to the battery cell group, and the second side is adapted to be connected to a side wall of the battery tray; The cavity has an opening extending to the second side and / or the first side.

10. The filling piece according to claim 9, characterized in that A partition structure is fixed in the cavity, and the partition structure divides the cavity into a plurality of weight-reducing cavities. The partition structure at least partially extends along the first direction.

11. The filling piece according to claim 10, characterized in that The partition structure includes a plurality of arc-shaped portions, the plurality of arc-shaped portions are arranged at intervals, each of the arc-shaped portions extends along the first direction, and one end of the arc-shaped portion located in the first direction is connected to a surface of the filler for connecting with the battery cell group; The partition structure further includes a plurality of first ribs, the first ribs being arranged along the second direction of the filler and connected between the cavity wall and the convex surface of the corresponding arc-shaped portion, or the first ribs being connected between the convex surfaces of two corresponding arc-shaped portions, and the second direction intersecting the first direction; and / or, The partition structure further includes a plurality of second ribs, the second ribs being arranged along a third direction of the filler and connected between a cavity wall of the cavity and a convex surface of a corresponding arc-shaped portion, or the second ribs being connected between convex surfaces of two corresponding arc-shaped portions, the third direction intersecting the first direction; and / or, The partition structure further includes a third rib plate, which is arranged obliquely, and two ends of the third rib plate are respectively connected between two corresponding arc-shaped portions.

12. The filling piece according to claim 11, characterized in that The cross-section of some of the arc-shaped portions in the plurality of arc-shaped portions perpendicular to the first direction is annular.

13. The filling piece according to claim 10, characterized in that The sum of the volumes occupied by the plurality of weight-reducing cavities forms a hollow volume, and the hollow volume accounts for 60% to 80% of the overall volume of the filling piece.

14. The filling piece according to claim 10, characterized in that The area of the outer contour of the cross section of the filling piece perpendicular to the first direction is the initial cross section area, and the area of the cross section of the filling piece perpendicular to the first direction is the remaining cross section area, which accounts for 20% to 40% of the initial cross section area.

15. The filling piece according to claim 10, characterized in that The filling piece is an integrally formed piece.

16. The filling piece according to any one of claims 1 to 7, characterized in that: The filling piece is made of insulating material.

17. A battery pack, characterized in that: Comprising a battery tray, a battery cell group, an electrical connector, and a filler as described in any one of claims 1 to 16; The battery tray has a receiving cavity, the battery cell group and the filling member are both arranged in the receiving cavity, and the filling space is formed between the battery cell group and the side wall of the battery tray; The electrical connector is passed through the avoidance portion.

18. The battery pack according to claim 17, characterized in that: There are multiple battery cell groups, each of which is provided with the filler on at least one side of the battery cell group in the first direction, the avoidance portion extends along the first direction, and the multiple battery cell groups are arranged at intervals along a third direction, which intersects the first direction; The electrical connector includes two first sections and a second section connecting the two first sections, one of the first sections is located in the avoidance portion of one of the two adjacent filling pieces in the third direction, and the other first section is located in the avoidance portion of the other of the two adjacent filling pieces in the third direction.

19. The battery pack according to claim 18, wherein: The battery tray includes a bottom plate, side beams and a partition beam, wherein the side beams are fixed to the edges of the bottom plate to define a mounting cavity, and the partition beams are arranged in the mounting cavity to divide the mounting cavity into a plurality of accommodating cavities; A second avoidance channel is provided on the partition beam, and the second section passes through the second avoidance channel.

20. The battery pack according to claim 19, wherein: The second avoidance channel is a notch provided at the end of the partition beam located in the first direction.

21. The battery pack according to any one of claims 17 to 20, characterized in that: The filling space is formed between the side walls of the battery cell group formed by the large surfaces of the battery cells and the side walls of the battery tray.

22. An electrical device, characterized in that: The device comprises a device body and a battery pack according to any one of claims 17 to 21, wherein the battery pack is mounted on the device body and is suitable for supplying power to the device body.

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