Battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack which comprises a box body, the height of the box body is larger than or equal to 150 mm, a plurality of hanging points are arranged on the side wall of the box body, the hanging points are distributed in at least two rows in the height direction of the box body, and the hanging points are used for being connected with a vehicle. And the distance between at least part of the plurality of lifting points and the height center line of the box body is within a / 3 range.

Description

Technical Field

[0001] The present disclosure relates to the technical field of batteries, and more particularly, to a battery pack. Background Art

[0002] In electric vehicles, a battery pack is often provided. The battery pack is installed on the vehicle body structure and is used to provide power to the electric vehicle. In order to install the battery pack on the vehicle body structure, lifting points are often provided on the battery pack, and the battery pack and the vehicle body structure are connected through the lifting points. In the related art, the lifting points of the battery pack are arranged at the bottom of the battery pack, and the arrangement of the lifting points at the bottom of the battery pack results in poor mounting stability of the battery pack on the vehicle.

[0003] It should be noted that the information disclosed in the above background art is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a battery pack, thereby at least to a certain extent improving the mounting stability of the battery pack on the vehicle.

[0005] The present disclosure provides a battery pack, which includes:

[0006] A box body, the height of the box body is a, a is greater than or equal to 150 mm, a plurality of lifting points are arranged on the side wall of the box body, and the plurality of lifting points are distributed in at least two rows along the height direction of the box body. The lifting points are used to connect the vehicle, and the distance between at least some of the plurality of lifting points and the height center line of the box body is within the range of a / 3.

[0007] The battery pack provided by the embodiment of the present disclosure solves the problem of poor mounting stability of the battery pack caused by mounting the battery pack through the lifting points arranged at the bottom of the battery pack when the height of the box body is greater than or equal to 150 mm, by arranging at least two rows of lifting points for connecting the vehicle on the side wall of the box body, improving the mounting stability of the battery pack on the vehicle. And the distance between at least some of the plurality of lifting points and the height center line of the box body is within the range of a / 3, so that at least some of the lifting points can mount the battery pack near the plane where the center of gravity of the battery pack is located, reducing the risk of the battery pack tipping over and further improving the mounting stability of the battery pack in the vehicle.

[0008] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Brief Description of the Drawings

[0009] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0010] Figure 1 Schematic diagram of the structure of a battery pack provided for an exemplary embodiment of the present disclosure;

[0011] Figure 2 Schematic diagram of the structure of another battery pack provided for an exemplary embodiment of the present disclosure.

[0012] 10. Box body; 11. Lifting point; 100. Single cell; 110. Battery compartment; 120. Electrical compartment; 101. First lifting area; 102. Second lifting area; 21. First battery layer; 22. Second battery layer; 30. Reinforcing plate. Detailed implementation manners

[0013] Next, the technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for the purpose of illustration and are not intended to limit the protection scope of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the protection scope of the present disclosure.

[0014] In the description of the present disclosure, unless otherwise clearly specified and defined, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; the term "plurality" means two or more; the term "and / or" includes any combination and all combinations of one or more of the associated listed items. In particular, referring to "the / said" object or "one" object also intends to represent one of the possible multiple such objects.

[0015] Unless otherwise specified or stated, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0016] Furthermore, in the description of the present disclosure, it should be understood that the orientation terms such as "upper", "lower", "inner", and "outer" described in the exemplary embodiments of the present disclosure are described from the angles shown in the drawings and should not be construed as limiting the exemplary embodiments of the present disclosure. It should also be understood that in the context, when an element or feature is referred to as being connected "above", "below", or "inside", "outside" another element (one or more), it can not only be directly connected "above", "below", or "inside", "outside" another element (one or more), but also be indirectly connected to another element (one or more) "above", "below", or "inside", "outside" through an intermediate element.

[0017] An exemplary embodiment of the present disclosure provides a battery pack, as Figure 1 shown, the battery pack includes a box body 10, the height of the box body 10 is a, a is greater than or equal to 150 mm, a plurality of lifting points 11 are arranged on the side wall of the box body 10, and the plurality of lifting points 11 are distributed in at least two rows along the height direction (Z direction) of the box body 10. The lifting points 11 are used to connect to a vehicle, and the distance between at least some of the plurality of lifting points 11 and the height center line of the box body 10 is within the range of a / 3.

[0018] Among them, the height of the box body 10 can be understood as the overall height of the battery pack. If the height of the box body 10 is greater than or equal to 150 mm, the overall height of the battery pack is high. For a battery pack with a high overall height, when the lifting points 11 are arranged at the bottom, the risk of the battery pack tipping over in the vehicle is relatively large, and the mounting stability is poor. The height center line of the box body 10 refers to the projection of the plane that bisects the box body 10 in the height direction on the side wall of the box body, and this height center line can be Figure 1 the line segment p in

[0019] The battery pack provided by the embodiment of the present disclosure solves the problem of poor mounting stability of the battery pack caused by mounting the battery pack through the lifting points 11 arranged at the bottom of the battery pack when the height of the box body 10 is greater than or equal to 150 by arranging at least two rows of lifting points 11 for connecting to the vehicle on the side wall of the box body 10, improves the mounting stability of the battery pack on the vehicle, and the distance between at least some of the plurality of lifting points 11 and the height center line of the box body 10 is within the range of a / 3, so that at least some of the lifting points 11 can mount the battery pack near the plane where the center of gravity of the battery pack is located, which can reduce the risk of the battery pack tipping over and further improve the mounting stability of the battery pack in the vehicle.

[0020] Furthermore, as Figure 2As shown, the battery pack provided by the embodiments of the present disclosure may further include a first battery layer 21, a second battery layer 22, and a reinforcing plate 30. The first battery layer 21 includes at least one single cell 100; the second battery layer 22 includes at least one single cell 100. A battery compartment 110 is formed in the box body 10. The first battery layer 21 and the second battery layer 22 are stacked in the battery compartment 110, and the first battery layer 21 is located on the side of the second battery layer 22 away from the bottom plate of the box body 10. The reinforcing plate 30 is located between the first battery layer 21 and the second battery layer 22, and the reinforcing plate 30 supports the first battery layer 21.

[0021] The following will detail each part of the battery pack provided by the embodiments of the present disclosure:

[0022] The box body 10 may include a bottom plate and a frame. The frame is connected to the bottom plate, and the frame and the bottom plate form a receiving space. This receiving space can be used as the battery compartment 110, or a partition beam is provided in this receiving space to divide the receiving space into the battery compartment 110 and the electrical compartment 120.

[0023] In some embodiments, the box body 10 may further include a box cover. The bottom plate and the frame form a lower box body, and the box cover is covered on the lower box body. The box cover is connected to the side of the frame away from the bottom plate to seal the lower box body to protect the batteries and electrical components in the lower box body.

[0024] It can be understood that in some other feasible embodiments of the present disclosure, the box body 10 may not include a box cover, and the lower box body is directly connected to the vehicle, and devices such as the vehicle's chassis or frame act as the box cover.

[0025] A plurality of lifting points 11 are provided on the side wall of the box body 10, and the plurality of lifting points 11 are distributed in at least two rows along the height direction of the box body 10. The side wall of the box body 10 may be formed by the frame of the box body 10, that is, the lifting points 11 are provided on the frame. For example, the frame of the box body 10 may include a first side beam, a second side beam, a third side beam, and a fourth side beam, and the first side beam, the second side beam, the third side beam, and the fourth side beam are sequentially connected end to end. Lifting points 11 may be provided on the first side beam and the third side beam respectively. The first side beam and the third side beam extend along the length of the vehicle body.

[0026] It should be noted that in the embodiments of the present disclosure, the side wall of the box body 10 is not limited to the frame of the box body 10. In some embodiments, the edge of the bottom plate of the box body 10 and the edge of the box cover may also be part of the side wall of the box body 10. That is, in the embodiments of the present disclosure, the lifting points 11 may all be provided on the frame; or part of the lifting points 11 are provided on the frame and part are provided on the side of the bottom plate; or, part of the lifting points 11 are provided on the frame and part are provided on the side of the box cover.

[0027] On the side wall of the box body 10, multiple lifting points 11 are distributed in at least two rows, and the at least two rows of lifting points 11 are arranged along the height direction of the box body 10. The height direction of the box body 10 is perpendicular to the bottom plate of the box body 10. In one row of lifting points 11, the multiple lifting points 11 are arranged along the extending direction of the side wall of the box body 10 where the lifting points 11 are arranged, that is, the row direction of the lifting points 11 is the side wall. For example, in Figure 1 , the height direction of the box body 10 is the Z direction, and the row direction of the lifting points 11 is the Y direction.

[0028] The lifting points 11 are arranged on the side wall of the box body 10, and the lifting points 11 are used to connect to a vehicle. For example, the lifting points 11 can be connecting holes, and the connecting holes can be connected to the main body structure of the vehicle through connecting pieces (such as bolts, plug-in pieces or connecting rods, etc.). Or, the lifting points 11 can also be protrusions arranged on the box body 10, and the protrusions can be connected to the main body structure of the vehicle (such as welding, clamping or plugging, etc.). Of course, in actual applications, the lifting points 11 can also be other structures, and the embodiments of the present disclosure are not limited thereto.

[0029] The height of the box body 10 is a, and the maximum distance of the lifting points 11 is b. The maximum distance of the lifting points 11 is the distance along the height direction of the box body 10 between the two lifting points with the largest distance in the height direction among the multiple lifting points 11, and 1 / 3 ≤ b / a ≤ 2 / 3.

[0030] Wherein, the height of the box body 10 is the maximum dimension of the box body 10 in the height direction, that is, the height of the box body 10 can be understood as the distance between the top surface of the box body 10 and the bottom surface of the box body 10. When the box body 10 includes a bottom plate and a frame, the height of the box body 10 is the distance from the bottom surface of the bottom plate to the top surface of the frame. When the box body 10 includes a bottom plate, a frame and a box cover, the height of the box body 10 can be the distance from the bottom surface of the bottom plate to the top surface of the box body 10. The maximum distance b of the lifting points 11 refers to the Z-direction distance between the two lifting points 11 with the largest distance in the height direction among the multiple lifting points 11.

[0031] By setting the ratio of the maximum distance of the lifting points 11 to the height of the box body 10 to be 1 / 3 - 2 / 3, on the one hand, it avoids the over-concentration of the lifting points 11 in the height direction, so that the bearing force of the hanging is too concentrated, which easily leads to the problem of continuous stress fatigue of the metal here; on the other hand, it also avoids the over-dispersion of the lifting points 11 in the height direction, which is not conducive to concentrating the hanging force at the center of gravity position of the battery box and may cause the problem of unstable hanging of the battery pack.

[0032] The box body 10 has a battery compartment 110 and an electrical compartment. The battery compartment 110 is used to accommodate the battery, and the electrical compartment 120 is used to accommodate electrical components such as the battery management module. The battery compartment 110 and the electrical compartment 120 are arranged adjacent to each other, and the battery compartment 110 and the electrical compartment 120 can be arranged along the row direction of the lifting points 11. The battery compartment 110 and the electrical compartment 120 can be two spaces separated by a partition beam in the box body 10, or the battery compartment 110 and the electrical compartment 120 can be two areas in the box body 10, and there is no partition between them.

[0033] The orthographic projection of the battery compartment 110 on the side wall of the box body 10 forms a first lifting area 101, and the orthographic projection of the electrical compartment 120 on the side wall of the box body 10 forms a second lifting area 102. The density of the lifting points 11 in the second lifting area 102 is greater than the density of the lifting points 11 in the first lifting area 101.

[0034] Among them, the first lifting area 101 is the projection area of the battery compartment 110 on the side wall of the box body 10 along the X direction, and the second lifting area 102 is the projection area of the electrical compartment 120 on the side wall of the box body 10 along the X direction. For example, lifting points 11 are provided on the first side beam and the third side beam. Then, the first lifting area 101 and the second lifting area 102 are formed on the first side beam, and the first lifting area 101 and the second lifting area 102 are also formed on the third side beam.

[0035] In the battery pack, the battery is placed in the battery compartment 110, and the electrical components are placed in the electrical compartment 120. The weight of the battery compartment 110 is greater than the weight of the electrical compartment 120. That is, the weights at both ends of the battery pack are unbalanced. When the battery pack is mounted on the vehicle, due to the unbalanced weight of the battery pack, it is easy to cause the lighter end to have an upward tendency, increasing the risk of the battery pack tipping. Therefore, the density of the lifting points 11 in the second lifting area 102 is set to be greater than the density of the first lifting area 101, so that the lifting points 11 at the lighter end of the battery pack are dense, thereby preventing the end of the battery pack from tilting up and improving the installation stability of the battery pack.

[0036] The minimum distance between the lifting points 11 in the first lifting area 101 in the height direction of the box body 10 is h1, and the minimum distance between the lifting points 11 in the second lifting area 102 in the height direction of the box body 10 is h2, and h2 < h1.

[0037] Optionally, 1 / 3 ≤ h2 / h1 ≤ 2 / 3. For example, h2 / h1 can be 1 / 3, 1 / 2, or 2 / 3, etc.

[0038] By setting h2 to be less than h1, the density of the lifting points 11 in the second lifting area 102 is greater than the density of the lifting points 11 in the first lifting area 101 in the height direction, thereby further suppressing the tilting tendency of the battery pack due to unbalanced weight and improving the connection stability of the battery pack.

[0039] Among them, multiple lifting points 11 in the first lifting area 101 are distributed in at least two rows. Arbitrarily select two lifting points 11 that are not arranged in the same row in the first lifting area 101. The distance between the two lifting points 11 in the height direction of the box body 10 is h1i, and the smallest among multiple h1i is h1. Multiple lifting points 11 in the second lifting area 102 are distributed in at least two rows. Arbitrarily select two lifting points 11 that are not arranged in the same row in the second lifting area 102. The distance between the two lifting points 11 in the height direction of the box body 10 is h2i, and the smallest among multiple h2i is h2.

[0040] The minimum spacing of the lifting points 11 in the first lifting area 101 in the row direction is L1, and the minimum spacing of the lifting points 11 in the second lifting area 102 in the row direction is L2, and L2 < L1. That is to say, the density of the lifting points 11 in the second lifting area 102 in the row direction is greater than that of the lifting points 11 in the first lifting area 101. By making the density of the lifting points 11 in the second lifting area 102 in the row direction greater than that of the lifting points 11 in the first lifting area 101, the tendency of the battery pack to roll due to uneven weight can be effectively suppressed, and the connection stability of the battery pack can be improved.

[0041] Among them, in the first lifting area 101, the distance between any two adjacent lifting points 11 in a row of lifting points 11 in the Y direction is L1i, and the smallest among multiple L1i is L1. In the second lifting area 102, the distance between any two adjacent lifting points 11 in a row of lifting points 11 in the Y direction is L2i, and the smallest among multiple L2i is L2.

[0042] The size of the first lifting area 101 in the row direction is M1, and 1 / 3 ≤ L1 / M1 ≤ 2 / 3. For example, L1 / M1 can be 1 / 3, 1 / 2, or 2 / 3, etc. L1 / M1 represents the density of the lifting points 11 in the first lifting area 101. The smaller the ratio, the denser it is. Excessive density is not conducive to the strength of the side plate where the lifting points 11 are located, and excessive sparseness is not conducive to the hanging strength. By setting L1 / M1 to 1 / 3 - 2 / 3, the rationality of the density of the lifting points 11 in the first lifting area 101 is ensured, taking into account both the hanging strength and the strength of the side wall itself.

[0043] The size of the second lifting area 102 in the row direction is M2, and 1 / 3 ≤ L2 / M2 ≤ 2 / 3. For example, L2 / M2 can be 1 / 3, 1 / 2, or 2 / 3, etc. L2 / M2 represents the density of the lifting points 11 in the second lifting area 102. The smaller the ratio, the denser it is. Excessive density is not conducive to the strength of the side plate where the lifting points 11 are located, and excessive sparseness is not conducive to the hanging strength. By setting L2 / M2 to 1 / 3 - 2 / 3, the rationality of the density of the lifting points 11 in the second lifting area 102 is ensured, taking into account both the hanging strength and the strength of the side wall itself.

[0044] The first battery layer 21 and the second battery layer 22 are arranged in the battery compartment 110, and the first battery layer 21 is located on the side of the second battery layer 22 away from the bottom of the box body 10, and the orthographic projection of the first battery layer 21 on the side wall of the box body 10 forms a first area, and a row of hanging points 11 are arranged in the first area near the bottom of the box body 10.

[0045] The hanging points 11 arranged at the first area near the bottom of the box 10 may at least partially overlap with the bottom edge of the first area. Or the distance between the row of hanging points 11 and the bottom edge of the first area is less than a preset threshold (for example, the preset threshold may be 10 mm, 20 mm or 50 mm, etc.). A row of hanging points 11 is arranged at the bottom of the upper battery to support and mount the upper battery and improve mounting stability.

[0046] For example, the upper row of hanging points 11 is located in the first zone near the bottom of the box 10, and the upper row of hanging points 11 is a row of hanging points 11 far from the bottom of the box 10 in at least two rows of hanging points 11. That is, the uppermost row of hanging points 11 is located at the bottom of the upper battery.

[0047] The orthographic projection of the reinforcing plate 30 on the side wall at least partially overlaps with the hanging point 11. The reinforcing plate 30 is used to support at least part of the battery, so the orthographic projection of the reinforcing plate 30 on the side wall at least partially overlaps with the hanging point 11, so that the hanging point 11 can act on the reinforcing plate 30 to improve the mounting strength and stability.

[0048] The reinforcing plate 30 is located between the first battery layer 21 and the second battery layer 22, and the reinforcing plate 30 passes through the battery compartment 110. The reinforcing plate 30 supports the first battery layer 21, and the reinforcing plate 30 is mounted through the hanging point 11 on the side of the reinforcing plate 30, so that the weight of the battery can be avoided from being concentrated on the bottom of the box 10, so that multiple rows of hanging points are evenly stressed, and the stability of the mounting is improved. It also avoids excessive stress on the local hanging point 11, which is beneficial to improving the service life of the battery pack.

[0049] The first battery layer 21 includes at least one single battery 100. When the first battery layer 21 includes multiple single batteries 100, the multiple single batteries 100 are distributed according to a preset rule. For example, the multiple single batteries 100 are distributed in an array. The multiple single batteries 100 in the first battery layer 21 form a battery flat layer, that is, the end faces of the multiple single batteries 100 along the first direction are aligned.

[0050] The second battery layer 22 includes at least one single battery 100. When the second battery layer 22 includes multiple single batteries 100, the multiple single batteries 100 are distributed according to a preset rule. For example, the multiple single batteries 100 are distributed in an array. The multiple single batteries 100 in the second battery layer 22 form a battery flat layer, that is, the end faces of the multiple single batteries 100 along the first direction are aligned.

[0051] The second battery layer 22 and the first battery layer 21 are stacked along the first direction, and there is a pressure relief space between the first battery layer 21 and the second battery layer 22. In the embodiments of the present disclosure, the single cells 100 in the first battery layer 21 and the second battery layer 22 are the same. Of course, in practical applications, the single cells 100 in the first battery layer 21 and the second battery layer 22 may also be different, and the embodiments of the present disclosure are not limited thereto.

[0052] The single cell 100 may include a battery case, an electrode assembly, and a terminal. The battery case is used to form the outer contour of the single cell 100 and protect the components inside the battery case. An accommodation space is provided inside the battery case, the electrode assembly is disposed in the accommodation space, the terminal is provided on the battery case, and the terminal is connected to the electrode assembly.

[0053] The battery case may include a case body and a cover plate. One end of the case body has an opening, and the cover plate is connected to the opening of the case body. The case body may include an end plate and a side frame. The end plate and the cover plate are disposed opposite to each other. The side frame is in a cylindrical structure with openings at both ends, and the end plate and the cover plate are respectively connected to both ends of the cylindrical structure.

[0054] The cover plate and the side frame are a split molding structure, and the cover plate and the side frame can be connected by means such as welding, riveting, or adhesive connection. The end plate and the side frame may be an integral molding structure or a split molding structure. When the end plate and the side frame are an integral molding structure, the case body can be formed by means such as stamping or casting. When the end plate and the side frame are a split molding structure, the case body can be formed by means such as welding, riveting, or adhesive connection.

[0055] The electrode assembly is disposed inside the battery case, the electrode assembly is connected to the terminal, and the electrode assembly is immersed in the electrolyte. The electrode assembly includes an electrode assembly body and tabs. The tabs extend from the electrode assembly body; there are two tabs on the electrode assembly body, and the two tabs are a first tab (positive tab) and a second tab (negative tab) respectively. The first tab and the second tab can be respectively connected to corresponding adapters.

[0056] It should be noted that the electrode assembly body may include more than two electrode plates, the tabs include more than two single-piece tabs, the single-piece tabs respectively extend from the corresponding electrode plates, the width of the single-piece tab is smaller than the width of the electrode plate, and multiple single-piece tabs are stacked to form the tabs.

[0057] In one embodiment, the battery is a stacked battery, which is not only convenient for grouping but also can be processed into a battery with a longer length. The electrode assembly is a stacked electrode assembly. The electrode assembly has a first electrode plate, a second electrode plate having an opposite electrical property to the first electrode plate, and a separator disposed between the first electrode plate and the second electrode plate that are stacked with each other, so that multiple pairs of the first electrode plates and the second electrode plates are stacked to form the stacked electrode assembly.

[0058] Optionally, the battery cell can be a wound battery cell, that is, the first electrode sheet, the second electrode sheet having an opposite electrical property to the first electrode sheet, and the separator sheet disposed between the first electrode sheet and the second electrode sheet are wound to obtain a wound battery cell.

[0059] In the embodiment of the present disclosure, the single battery 100 is a cylindrical battery. The axis of the single battery 100 is arranged along the first direction, and a plurality of single batteries 100 are arranged in two layers vertically. The vertical arrangement of the plurality of single batteries 100 can effectively save the size of the battery pack in the non-height direction, which is beneficial to the flexible layout of the battery pack in the electric vehicle.

[0060] On this basis, the cover plate and the bottom plate are disk structures, and the side frame is a hollow cylindrical structure. When the battery is a cylindrical battery, a pole column is provided on the battery housing, and the pole column is used as one electrode end of the battery, and the other electrode end of the battery is the battery housing. For example, the pole column is the positive electrode end of the battery, the pole column is connected to the positive electrode tab of the battery cell, the battery housing is the negative electrode end of the battery, and the battery housing is connected to the negative electrode tab of the battery cell.

[0061] It can be understood that in some other embodiments, the single battery 100 can also be a quadrangular prism battery. The quadrangular prism battery can include a first pole column and a second pole column, the first pole column and the second pole column are respectively disposed on the surface of the battery housing, and the first pole column and the second pole column are respectively connected to the battery cell.

[0062] For the battery pack provided by the embodiment of the present disclosure, by providing at least two rows of suspension points 11 for connecting to the vehicle on the side wall of the box body 10, the problem that when the height of the box body 10 is greater than or equal to 150 mm is solved.

[0063] When the battery pack is mounted by the suspension points 11 provided at the bottom of the battery pack, the problem of poor mounting stability of the battery pack is caused, and the mounting stability of the battery pack on the vehicle is improved. And the distance between at least some of the suspension points 11 and the height center line of the box body 10 is within the range of a / 3, so that at least some of the suspension points 11 can mount the battery pack near the plane where the center of gravity of the battery pack is located, which can reduce the risk of the battery pack tipping over and further improve the mounting stability of the battery pack in the vehicle.

[0064] The battery pack provided by the embodiment of the present disclosure can be applied to an electric vehicle. The battery pack is installed on the electric vehicle to provide energy for the electric vehicle. In actual applications, the battery pack can be installed on the frame of the electric vehicle. The battery pack can be fixedly connected to the frame. Or the battery pack can be a modular battery pack, and the modular battery pack can be detachably connected to the vehicle body for easy replacement.

[0065] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. A battery pack, characterized in that: The battery pack comprises: A box body, wherein the height of the box body is a, a is greater than or equal to 150 mm, a plurality of hanging points are arranged on the side wall of the box body, the plurality of hanging points are distributed in at least two rows along the height direction of the box body, the hanging points are used to connect the vehicle, and the distance between at least some of the plurality of hanging points and the height center line of the box body is within the range of a / 3.

2. The battery pack according to claim 1, characterized in that: The maximum distance of the hanging points is b, which is the distance between the two hanging points with the largest distance in the height direction of the box among the multiple hanging points, along the height direction of the box, 1 / 3≤b / a≤2 / 3.

3. The battery pack according to claim 1, wherein: A battery compartment is formed in the box, and the battery pack further includes: A first battery layer, wherein the first battery layer includes at least one single battery; a second battery layer, the second battery layer comprising at least one single battery; Wherein, the first battery layer and the second battery layer are arranged in the battery compartment, and the first battery layer is located on the side of the second battery layer away from the bottom of the box body, the orthographic projection of the first battery layer on the side wall of the box body forms a first area, and a row of the hanging points are arranged in the first area near the bottom of the box body.

4. The battery pack according to claim 3, characterized in that: The upper row of hanging points is located in the first zone close to the bottom of the box body, and the upper row of hanging points is a row of hanging points far away from the bottom of the box body among the at least two rows of hanging points.

5. The battery pack according to claim 3, characterized in that: The battery pack further comprises: A reinforcing plate, wherein the orthographic projection of the reinforcing plate on the side wall at least partially coincides with the hanging point, the reinforcing plate is located between the first battery layer and the second battery layer, and the reinforcing plate passes through the battery compartment.

6. The battery pack according to claim 1, wherein: The box body has a battery compartment and an electrical compartment, the orthographic projection of the battery compartment on the side wall of the box body forms a first lifting area, the orthographic projection of the electrical compartment on the side wall of the box body forms a second lifting area, and the density of lifting points in the second lifting area is greater than the density of lifting points in the first lifting area.

7. The battery pack according to claim 6, characterized in that: The minimum spacing between the hanging points in the first hanging area in the height direction of the box is h1, and the minimum spacing between the hanging points in the second hanging area in the height direction of the box is h2, h2 <h1。 8. The battery pack according to claim 7, characterized in that: 1 / 3≤h2 / h1≤2 / 3.

9. The battery pack according to claim 6, characterized in that: The minimum spacing between the hanging points in the first hanging area in the arrangement direction is L1, and the minimum spacing between the hanging points in the second hanging area in the arrangement direction is L2. <L1。 10. The battery pack according to claim 9, characterized in that: The size of the first hoisting area in the row direction is M1, 1 / 3≤L1 / M1≤2 / 3.

11. The battery pack according to claim 9, characterized in that: The size of the second lifting area in the row direction is M2, 1 / 3≤L2 / M2≤2 / 3.

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