Battery pack support and battery pack

Abstract

The utility model provides a battery pack bracket and a battery pack. The battery pack bracket comprises a fixed bracket and a movable bracket, the first mounting bracket is in non-rigid connection with the lower box body of the battery pack through the fixing bracket, and the first mounting bracket is provided with a first mounting position. According to the battery pack bracket and the battery pack provided by the invention, when the battery pack vibrates or is impacted, the first mounting bracket realizes non-rigid connection with the lower box body through the fixed bracket, so that the acting force can be transmitted from the lower box body of the battery pack to the first mounting bracket through the fixed bracket; the fixing support can eliminate part of acting force through deformation of the fixing support or relative displacement between the lower box body and the first mounting support, only part of the acting force can be transmitted to the first mounting support, and the acting force borne by the first mounting support can be effectively reduced; the risk that the first mounting bracket is broken due to large acting force is reduced, and the service life of the battery pack bracket is prolonged.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a battery pack bracket and a battery pack. Background Technology

[0002] With the continuous development of new energy vehicles, power batteries are gradually moving towards higher energy density and higher volume utilization to save space for electrical devices that house battery packs.

[0003] The BMS (BATTERY MANAGEMENT SYSTEM) module is used to monitor and control the battery pack. The BMS module can be fixed inside the battery pack using a battery pack bracket. The design of the battery pack bracket must not only meet the requirements for installation and removability within the constraints of the battery pack space requirements, but also meet the mechanical performance requirements for vibration and impact to prevent the battery pack bracket from breaking during vibration or impact. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a battery pack bracket and a battery pack, so as to at least partially solve the problem that the battery pack bracket may break under vibration and impact.

[0005] To achieve the above objectives, the first aspect of this application provides a battery pack bracket, comprising: a fixed bracket; and a first mounting bracket, which is non-rigidly connected to the lower casing of the battery pack via the fixed bracket, wherein the first mounting bracket is provided with a first mounting position.

[0006] Optionally, the elastic modulus of the fixed bracket is between 56 GPa and 105 GPa.

[0007] Optionally, both the first mounting bracket and the fixed bracket are plate-shaped structures; the thickness of the fixed bracket is greater than the thickness of the first mounting bracket, and the thickness difference is 0.5 mm to 1 mm; and / or, the thickness of the first mounting bracket is 1 mm to 1.5 mm.

[0008] Optionally, the fixing bracket includes a first fixing part and a first connecting part that are connected to each other in an L-shape. The first fixing part is adapted to be connected to the lower housing, and the first connecting part is connected to the first mounting bracket.

[0009] Optionally, the fixing bracket includes an integrally formed plate-like structure, the middle of which is bent to form the first fixing part and the first connecting part on both sides of the fold.

[0010] Optionally, there are multiple fixing brackets, and the multiple fixing brackets are symmetrically arranged along the length direction of the first mounting bracket.

[0011] Optionally, the first mounting bracket includes a first mounting portion, a second mounting portion, a second connecting portion, and a first supporting portion; the second connecting portion is disposed above the fixed bracket and is used to connect with the battery pack in the battery pack; the first mounting portion is disposed at intervals between the second connecting portion and the fixed bracket; the second mounting portion is connected between the second connecting portion and the first mounting portion; the first supporting portion is connected between the fixed bracket and the first mounting portion; the first mounting portion has a first mounting surface, and the first mounting position is disposed on the first mounting surface.

[0012] Optionally, a folded edge is provided along the edge of the first mounting portion, bending away from the first mounting surface, and the folded edge is provided with a through-hole for threading.

[0013] Optionally, the battery pack bracket further includes a second mounting bracket, which includes a third mounting portion and a second support portion connected to each other. The third mounting portion is spaced apart from the first mounting portion and is connected to the first mounting surface through the second support portion. The third mounting portion has a second mounting surface away from the first mounting surface, and the second mounting surface is provided with a second mounting position.

[0014] Optionally, at least one of the first mounting part, the second mounting part, and the third mounting part is provided with a through-hole for weight reduction.

[0015] Based on the same inventive concept, the second aspect of this application also provides a battery pack, including a lower housing, at least one battery pack, and a battery pack support as described in the first aspect.

[0016] Optionally, the battery pack includes a cell stack and a cell end plate connected to at least one side of the cell stack, and the first mounting bracket includes a second connecting portion connected to the cell end plate.

[0017] As can be seen from the above, the battery pack bracket and battery pack provided in this application, when the battery pack vibrates or is impacted, because the first mounting bracket achieves a non-rigid connection with the lower housing through the fixed bracket, the force is transmitted from the lower housing of the battery pack to the first mounting bracket through the fixed bracket. The fixed bracket can eliminate part of the force by deforming itself or by causing relative displacement between the lower housing and the first mounting bracket. Only part of the force will be transmitted to the first mounting bracket, which can effectively reduce the force on the first mounting bracket, reduce the risk of the first mounting bracket breaking due to large forces, and help improve the service life of the battery pack bracket.

[0018] Meanwhile, since the force on the first mounting bracket is relatively small, the control devices of the battery pack installed at the first mounting position can also be effectively protected, which helps to ensure that the battery pack can work normally even when it is vibrated or impacted. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a battery pack bracket according to an embodiment of this application;

[0021] Figure 2 This is a cross-sectional view of the battery pack bracket installed in the lower housing according to an embodiment of this application;

[0022] Figure 3 A schematic diagram of a car equipped with a battery pack bracket according to an embodiment of this application;

[0023] Figure 4 for Figure 1 An enlarged schematic diagram of part A in the middle;

[0024] Figure 5 This is a schematic diagram showing the connection between the fixing bracket of the battery pack bracket and the lower casing of the battery pack in an embodiment of this application.

[0025] Figure 6 This is a schematic diagram of the first mounting bracket of the battery pack bracket according to an embodiment of this application;

[0026] Figure 7 This is a schematic diagram of the second mounting bracket of the battery pack bracket according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1100, Fixed bracket; 1110, First fixing part; 1120, First connecting part;

[0029] 1200, First mounting bracket; 1210, First mounting part; 1211, First mounting surface; 12111, First mounting position; 1212, Folded edge; 1213, Through hole; 1220, Second mounting part; 1230, Second connecting part; 1240, First support part;

[0030] 1300, weight reduction hole; 1400, through hole;

[0031] 1500, Second mounting bracket; 1510, Third mounting part; 1511, Second mounting surface; 15111, Second mounting position; 1520, Second support part;

[0032] 2000, Lower housing; 2100, Bottom plate; 2200, Side plate; 2300, End plate of housing;

[0033] 3000, battery pack; 3100, battery cell; 3200, battery cell end plate;

[0034] 4000, Controllers. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0036] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components described in these embodiments do not limit the scope of this application.

[0037] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0038] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0039] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] In related technologies, to prevent battery pack support failure, some embodiments involve adding support seats or support ribs to the plate-like battery pack support structure to improve its structural strength. However, the added support seats or support ribs not only increase the manufacturing cost of the battery pack but also increase the weight and space occupied by the battery pack support, thereby reducing the energy density of the battery pack.

[0041] The applicant's research found that, in order to prevent the battery pack bracket from breaking during vibration and impact, the structural strength of the battery pack bracket can be increased on the one hand, and the stress transmitted from the battery pack housing to the battery pack bracket can be reduced on the other hand.

[0042] In view of this, this embodiment provides a battery pack bracket. Figure 1 A schematic diagram of the battery pack bracket is shown. Figure 2 A schematic diagram showing the battery pack bracket installed in the lower housing 2000 is provided. Figure 1 and Figure 2 The battery pack bracket includes: a fixed bracket 1100; and a first mounting bracket 1200, which is non-rigidly connected to the lower housing 2000 of the battery pack via the fixed bracket 1100. The first mounting bracket 1200 is provided with a first mounting position 12111.

[0043] It should be noted that in this application, "non-rigid connection" includes one or more of flexible connections, flexible connections, elastic connections, and adhesive bonding. "Non-rigid" is a property of an object relative to rigidity, meaning that the object is allowed to undergo a certain amount of displacement or deformation after being subjected to force. In other words, when the lower casing 2000 of the battery pack and the first mounting bracket 1200 are non-rigidly connected, if one of them is displaced or subjected to force, relative displacement or relative deformation can occur between the two, thereby reducing the transmission of force between them.

[0044] For example, the fixing bracket 1100 can be configured as a slightly deformable non-rigid connection by means of materials (e.g., a deformable elastic material) or structures (e.g., an arc-shaped structure or an L-shaped structure that can produce elastic deformation).

[0045] When the battery pack vibrates or is impacted, external forces act directly on the lower housing 2000. In this embodiment, during the transmission of force from the lower housing 2000 to the first mounting bracket 1200 via the fixed bracket 1100, the first mounting bracket 1200 is non-rigidly connected to the lower housing 2000 through the fixed bracket 1100. The fixed bracket 1100 can eliminate part of the force by deforming itself, or by creating a relative displacement between the lower housing 2000 and the first mounting bracket 1200. This effectively reduces the force on the first mounting bracket 1200 and lowers the risk of breakage.

[0046] The first mounting position 12111 can be used to mount the control device 4000 of the battery pack (e.g., BMS module). Since the force on the first mounting bracket 1200 is small when the battery pack vibrates or is impacted, the adverse effects on the control device 4000 mounted on the first mounting position 12111 are also small, thus protecting the control device 4000.

[0047] The battery pack bracket provided in this application embodiment, when the battery pack vibrates or is impacted, because the first mounting bracket 1200 is non-rigidly connected to the lower housing 2000 through the fixed bracket 1100, the force is transmitted from the lower housing 2000 of the battery pack to the first mounting bracket 1200 through the fixed bracket 1100. The fixed bracket 1100 can deform itself or cause relative displacement between the lower housing 2000 and the first mounting bracket 1200 to eliminate part of the force. Only part of the force will be transmitted to the first mounting bracket 1200, which can effectively reduce the force on the first mounting bracket 1200, reduce the risk of the first mounting bracket 1200 breaking due to large forces, and help improve the service life of the battery pack bracket.

[0048] Meanwhile, since the force on the first mounting bracket 1200 is relatively small, the control device 4000 of the battery pack installed on the first mounting position 12111 can also be effectively protected, which helps to ensure that the battery pack can work normally when it is vibrated or impacted.

[0049] In some embodiments, the elastic modulus of the fixation bracket 1100 is 56 GPa to 105 GPa.

[0050] For example, the elastic modulus of the fixed bracket 1100 can be 56 GPa, 60 GPa, 65 GPa, 70 GPa, 75 GPa, 80 GPa, 85 GPa, 90 GPa, 95 GPa, 100 GPa or 105 GPa.

[0051] If the elastic modulus of the fixed bracket 1100 is too large, its resistance to deformation will be too strong. When the battery pack vibrates or is impacted, the fixed bracket 1100 will have difficulty dissipating the force through deformation, resulting in an excessive force transmitted to the first mounting bracket 1200. If the elastic modulus of the fixed bracket 1100 is too small, it will be too easily deformed. In this case, the first mounting bracket 1200 will have difficulty being stably connected to the battery pack through the fixed bracket 1100. If the relative displacement between the first mounting bracket 1200 and the lower housing 2000 is too large, causing them to collide, the first mounting bracket 1200 may also break.

[0052] To avoid the aforementioned problems, this embodiment designs the elastic modulus of the fixed bracket 1100 to be between 56 GPa and 105 GPa. This ensures that the first mounting bracket 1200 is stably maintained in the preset position within the battery pack, and also minimizes the stiffness difference between the fixed bracket 1100 and the first mounting bracket 1200. When the battery pack vibrates or is impacted, the fixed bracket 1100 and the first mounting bracket 1200 share the force. The slight deformation of the fixed bracket 1100 itself can reduce the force transmitted to the first mounting bracket 1200, thereby reducing the risk of breakage of the first mounting bracket 1200 and significantly improving the service life of the battery pack bracket.

[0053] In some embodiments, both the first mounting bracket 1200 and the fixed bracket 1100 are plate-shaped structures, and the thickness of the first mounting bracket 1200 is 1 mm to 1.5 mm.

[0054] For example, the thickness of the first mounting bracket 1200 can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm or 1.5mm.

[0055] If the thickness of the first mounting bracket 1200 is too large, it will result in an excessively heavy overall weight of the battery pack bracket and occupy too much space within the battery pack, leading to a lower energy density of the battery pack. If the thickness of the first mounting bracket 1200 is too small, it will result in lower structural strength of the first mounting bracket 1200, making it prone to breakage.

[0056] To avoid the above problems, the thickness of the first mounting bracket 1200 in this embodiment is designed to be 1mm to 1.5mm. This can ensure the structural strength of the first mounting bracket 1200 and prevent it from breaking when the battery pack vibrates or is impacted. It can also control the weight of the first mounting bracket 1200 itself, which helps to make the battery pack have a larger energy density.

[0057] In some embodiments, the thickness of the fixed bracket 1100 is greater than the thickness of the first mounting bracket 1200, and the thickness difference (hereinafter referred to as the first thickness difference) is 0.5 mm to 1 mm.

[0058] For example, the first thickness difference can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm.

[0059] The applicant conducted extensive vibration tests on the thickness design of both the fixed bracket 1100 and the first mounting bracket 1200, and the test data are shown in Table 1.

[0060] Table 1. Force data of fixed bracket 1100 and first mounting bracket 1200 of different thicknesses under random vibration conditions.

[0061]

[0062]

[0063] In Table 1, A represents the thickness of the first mounting bracket 1200, B represents the thickness of the fixed bracket 1100, and C represents the weight of the battery pack bracket. Figure 3 A schematic diagram of a car equipped with a battery pack bracket according to an embodiment of this application is shown, such as... Figure 3 X1 represents the direction of the car's travel (e.g., ...). Figure 3 The maximum stress value of the battery pack bracket under random vibration conditions (X1 direction in the image), where Y1 is the lateral direction of the vehicle (e.g., ...). Figure 3 The maximum stress value of the battery pack bracket under random vibration conditions (Y1 direction in the vehicle), where Z1 is the vertical direction of the vehicle (e.g., the maximum stress value of the battery pack bracket under random vibration conditions). Figure 3 The maximum stress value of the battery pack support under random vibration conditions (Z1 direction). M is the first-order local modal frequency of the battery pack support.

[0064] Taking Examples 3 and 6 in Table 1 as examples for comparison, in Example 6, the first thickness difference is 18.5 mm, X1 is 77.4 MPa, and Y1 is 45.2 MPa. In Example 3, the first thickness difference is 0.5 mm, which is significantly reduced compared to Example 6. X1 decreases to 25.2 MPa, a reduction of 67.4%, and Y1 decreases to 18.7 MPa, a reduction of 58.6%.

[0065] Based on the above data, it can be seen that designing the first thickness difference to be 0.5mm to 1mm can significantly reduce the force on the first mounting bracket 1200 when the battery pack is vibrated or subjected to impact, which helps to reduce the risk of the first mounting bracket 1200 breaking.

[0066] Figure 4 Showing Figure 1 An enlarged schematic diagram of part A in the middle; Figure 5 A schematic diagram showing the connection between the fixed bracket 1100 and the lower casing 2000 of the battery pack is provided.

[0067] like Figure 4 and Figure 5 In some embodiments, the fixing bracket 1100 includes a first fixing part 1110 and a first connecting part 1120 connected to each other in an L-shape. The first fixing part 1110 is adapted to be connected to the lower housing 2000, and the first connecting part 1120 is connected to the first mounting bracket 1200.

[0068] For example, the connection between the fixed bracket 1100 and the lower housing 2000, and / or between the fixed bracket 1100 and the first mounting bracket 1200, can be achieved by means of plugging, snapping, welding, bonding, fastener (e.g., threaded post or screw) connection or snapping.

[0069] For example, such as Figure 5 The lower housing 2000 may include a bottom plate 2100 and a frame structure formed by two side plates 2200 and two housing end plates 2300, the frame structure being connected to the bottom plate 2100.

[0070] For example, at least one side surface of the first fixing part 1110 may be parallel or substantially parallel to the inner side wall of the lower housing 2000 (e.g., the inner side surface of the side plate 2200), and the first fixing part 1110 is attached to the inner side wall of the lower housing 2000 through this surface.

[0071] For example, at least one side surface of the first connecting portion 1120 may be parallel or substantially parallel to the surface of the base plate 2100, and the first fixing portion 1110 may be connected to the first mounting bracket 1200 through this surface.

[0072] In order to achieve a non-rigid connection between the first mounting bracket 1200 and the lower housing 2000 via the fixed bracket 1100, the fixed bracket 1100 can be designed as an L-shaped structure. When the fixed bracket 1100 is subjected to a force, at least at the connection between the first fixing part 1110 and the first connecting part 1120 (i.e., the bending point of the L-shaped structure) a slight deformation can occur, thereby consuming part of the force and achieving the purpose of reducing the force transmission.

[0073] like Figure 3 In some embodiments, the fixing bracket 1100 includes an integrally formed plate-like structure, the middle of which is bent to form a first fixing part 1110 and a first connecting part 1120 on both sides of the fold.

[0074] The fixing bracket 1100 can be constructed by a single bending process, forming a first fixing part 1110 and a first connecting part 1120 on both sides of the fold, giving the fixing bracket 1100 an overall L-shaped structure. In this embodiment, the fixing bracket 1100 is relatively easy to manufacture, which helps to reduce the manufacturing cost of the battery pack bracket and is beneficial for mass production.

[0075] like Figure 1 In some embodiments, there are multiple fixing brackets 1100, and the multiple fixing brackets 1100 are along the length direction of the first mounting bracket 1200 (e.g., Figure 1 The X-direction is symmetrically set.

[0076] For example, the length direction of the first mounting bracket 1200 is the same as the setting direction of the two side plates 2200 of the lower housing 2000.

[0077] For example, at least one fixing bracket 1100 may be provided on one side of the first mounting bracket 1200. For example, there may be two fixing brackets 1100, with one fixing bracket 1100 connected to each side of the first mounting bracket 1200.

[0078] The fixed bracket 1100 is symmetrically arranged along the length of the first mounting bracket 1200, which can make the supporting force applied by the fixed bracket 1100 to the first mounting bracket 1200 more uniform, thereby ensuring that the first mounting bracket 1200 can be held relatively stably in the preset position in the battery pack, and preventing the first mounting bracket 1200 from breaking due to uneven force on both sides.

[0079] Figure 6 A schematic diagram of the first mounting bracket 1200 is shown.

[0080] like Figure 2 and Figure 6 In some embodiments, the first mounting bracket 1200 includes a first mounting portion 1210, a second mounting portion 1220, a second connecting portion 1230, and a first support portion 1240; the second connecting portion 1230 is disposed above the fixed bracket 1100 and is used to connect with the battery pack 3000 in the battery pack; the first mounting portion 1210 is disposed at intervals between the second connecting portion 1230 and the fixed bracket 1100; the second mounting portion 1220 is connected between the second connecting portion 1230 and the first mounting portion 1210; the first support portion 1240 is connected between the fixed bracket 1100 and the first mounting portion 1210; the first mounting portion 1210 has a first mounting surface 1211, and a first mounting position 12111 is disposed on the first mounting surface 1211.

[0081] For example, the battery pack 3000 may include a cell stack, the cell stack including components along a first direction (e.g., Figure 2The battery pack comprises a plurality of battery cells 3100 arranged in the Y direction, and a battery cell end plate 3200 connected to at least one side of the battery cell stack along the first direction.

[0082] For example, the second connection portion 1230 may be connected to the cell end plate 3200 of the battery pack 3000; or, it may be connected between the cell end plate 3200 and the cell stack.

[0083] For example, the second connecting part 1230 and the battery pack 3000 can be connected by means of welding, bonding, plugging, snapping or fastener connection.

[0084] For example, the first support portion 1240 and the fixed bracket 1100 can correspond one-to-one, or one first support portion 1240 can correspond to at least two fixed brackets 1100 on the same side.

[0085] For example, the surface of the second mounting portion 1220 near the first mounting position 12111 can be used to connect a sampling element, which may include a connecting line, wire harness or flexible circuit board connected to the controller 4000.

[0086] For example, the first mounting part 1210 is a horizontally arranged plate structure used to horizontally support the control device 4000; the second mounting part 1220 is a vertically arranged plate structure, and the second mounting part 1220 can be attached to the cell end plate 3200.

[0087] For example, the first mounting surface 1211 is the upper surface of the first mounting part 1210 (i.e., the opening of the first mounting surface 1211 facing the lower housing 2000).

[0088] For example, the second connecting part 1230 can be connected to the top of the battery pack 3000, and the longitudinal cross-section of the first mounting part 1210, the second mounting part 1220 and the second connecting part 1230 is Z-shaped.

[0089] The second connecting part 1230 is connected to the battery pack 3000 and can provide support for the battery pack bracket through the battery pack 3000, which greatly improves the local mode of the battery pack bracket, thereby further improving the stability of the first mounting bracket 1200 inside the battery pack and preventing the first mounting bracket 1200 from colliding with the lower housing 2000 or the battery pack 3000.

[0090] Meanwhile, since the second connecting part 1230 is indirectly connected to the lower housing 2000 through the battery pack 3000, when the battery pack vibrates or is impacted, the force on the lower housing 2000 will not be excessively transmitted to the first mounting part 1210 through the second connecting part 1230, and will not increase the risk of the first mounting bracket 1200 breaking.

[0091] In addition, the second mounting part 1220, the second connecting part 1230 and the first mounting part 1210 can be designed as an integral structure to reduce the thickness of the second mounting part 1220 and the second connecting part 1230 and the space occupied inside the battery pack, which helps to improve the space utilization rate inside the battery pack.

[0092] like Figure 6 In some embodiments, a folded edge 1212 is provided along the edge of the first mounting portion 1210, bending away from the first mounting surface 1211, and the folded edge 1212 is provided with a through wire hole 1213.

[0093] For example, the folded edge 1212 may be provided at least at the edge of the first mounting portion 1210 that is away from the second mounting portion 1220.

[0094] For example, multiple wire holes 1213 can be provided, and multiple wire holes 1213 can be provided at intervals along the edge of the first mounting portion 1210 on the folded edge 1212.

[0095] In this embodiment, by providing a folded edge 1212 at the edge of the first mounting portion 1210, the structural strength of the first mounting portion 1210 is improved, thereby further reducing the risk of the first mounting portion 1210 breaking under stress. Simultaneously, during battery pack assembly, the connecting wires connected to the control device 4000 on the first mounting position 12111 can pass through the wire hole 1213, which constrains the connecting wires, making the internal wiring of the battery pack more organized and easier to maintain.

[0096] Figure 7 A schematic diagram of the second mounting bracket 1500 is shown, as follows. Figure 6 and Figure 7 In some embodiments, the battery pack bracket further includes a second mounting bracket 1500. The second mounting bracket 1500 includes a third mounting portion 1510 and a second support portion 1520 connected to each other. The third mounting portion 1510 is spaced apart from the first mounting portion 1210. The third mounting portion 1510 is connected to the first mounting surface 1211 through the second support portion 1520. The third mounting portion 1510 has a second mounting surface 1511 away from the first mounting surface 1211. The second mounting surface 1511 is provided with a second mounting position 15111.

[0097] It should be noted that the structure and function of the second mounting position 15111 are similar to those of the first mounting position 12111, and will not be described again here.

[0098] In this embodiment, by connecting the second mounting bracket 1500 to the first mounting bracket 1200, a second mounting position 15111 can be formed on the basis of the first mounting position 12111, so that the battery pack bracket can install at least two layers of control devices 4000, thereby improving the space utilization rate inside the battery pack.

[0099] Meanwhile, in this embodiment, the third mounting part 1510 can be mounted on the first mounting part 1210 by the second support part 1520, so as to avoid interference between the third mounting part 1510 and the control device 4000 installed in the first mounting position 12111.

[0100] To facilitate the mounting of the control device 4000 onto the first mounting position 12111 of the first mounting surface 1211, the first mounting surface 1211 is located on the upper surface of the first mounting portion 1210. Similarly, to facilitate the mounting of the third mounting portion 1510 onto the first mounting portion 1210, the third mounting portion 1510 can be connected to the first mounting surface 1211 via the second support portion 1520, and the surface of the third mounting portion 1510 away from the first mounting surface 1211, i.e., the upper surface of the third mounting portion 1510, can be configured as the second mounting surface 15111 to provide the second mounting position 15111, thereby facilitating the mounting of the control device 4000 onto the second mounting position 15111.

[0101] In some embodiments, a plurality of studs may be provided on the first mounting surface 1211 and / or the second mounting surface 1511. The area corresponding to the plurality of studs provided on the first mounting surface 1211 can be constructed as the first mounting position 12111, and similarly, the area corresponding to the plurality of studs provided on the second mounting surface 1511 can be constructed as the second mounting position 15111. The studs can be used to fix the control device 4000 placed in the first mounting position 12111 or the second mounting position 15111, so that the control device 4000 can be stably held in the first mounting position 12111 or the second mounting position 15111.

[0102] like Figure 6 and Figure 7 In some embodiments, at least one of the first mounting portion 1210, the second mounting portion 1220 and the third mounting portion 1510 is provided with a through weight reduction hole 1300.

[0103] For example, the weight reduction hole 1300 can be designed according to the shape of the structural member in which it is located (e.g., the first mounting part 1210, the second mounting part 1220, or the third mounting part 1510).

[0104] For example, the weight reduction hole 1300 can be a circular hole, a triangular hole, or a trapezoidal hole.

[0105] A topology optimization method can be used to significantly reduce weight by opening holes in the non-force transmission paths of the first mounting part 1210, the second mounting part 1220, or the third mounting part 1510. While ensuring the structural strength of the first mounting part 1210, the second mounting part 1220, and the third mounting part 1510 and their reliable connection, the weight and manufacturing cost of the battery pack bracket can be further reduced, which helps to improve the energy density of the battery pack.

[0106] Based on the same inventive concept and in conjunction with the description of the battery pack brackets in the above embodiments, this embodiment provides a battery pack that has the corresponding technical effects of the battery pack brackets in the above embodiments, which will not be repeated here.

[0107] like Figure 2 A battery pack includes a lower housing 2000, at least one battery pack 3000, and a battery pack bracket as described in the various embodiments above.

[0108] For example, the battery pack may also include an upper housing that covers the lower housing 2000, the upper housing and the lower housing 2000 forming a receiving space, in which the battery pack 3000, the battery pack bracket and the control device 4000 mounted on the battery pack bracket are all located.

[0109] like Figure 2 In some embodiments, the battery pack 3000 includes a cell stack and a cell end plate 3200 connected to at least one side of the cell stack. The first mounting bracket 1200 includes a second connecting portion 1230 connected to the cell end plate 3200.

[0110] In the battery pack 3000, the cell end plate 3200 can be used to position the stacked cells. Therefore, the structural strength of the cell end plate 3200 can be designed to be relatively large. When the battery pack bracket is connected to the cell end plate 3200 through the second connecting part 1230, the strong cell end plate 3200 can provide reliable support for the entire battery pack bracket, ensuring that the battery pack bracket can be stably maintained in the preset position in the battery pack.

[0111] It should be noted that some embodiments of this application have been described above. Other embodiments are within the scope of the appended claims.

[0112] The various embodiments in this application are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0113] The description in this application is given for illustrative purposes and is not intended to be exhaustive or to limit the application to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of this application and to enable those skilled in the art to understand this application and design various embodiments with various modifications suitable for a particular purpose.

[0114] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0115] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0116] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A battery pack holder, characterized by, The battery pack bracket comprises: a fixed support; a first mounting support non-rigidly connected with the lower box of the battery pack through the fixed support, the first mounting support being provided with a first mounting position.

2. The battery pack holder of claim 1, wherein, The elastic modulus of the fixed support is 56 GPa to 105 GPa.

3. The battery pack cradle of claim 1, wherein, The first mounting support and the fixed support are both plate-shaped structures. The thickness of the fixed support is greater than the thickness of the first mounting support, and the thickness difference is 0.5 mm to 1 mm; and / or, the thickness of the first mounting support is 1 mm to 1.5 mm.

4. The battery pack cradle of claim 1, wherein, The fixed support comprises a first fixed part and a first connecting part connected with each other in an L shape, the first fixed part being adapted to be connected with the lower box, and the first connecting part being connected with the first mounting support.

5. The battery pack holder of claim 4, wherein, The fixed support comprises an integrally formed plate-shaped structure, the middle part of the plate-shaped structure being bent to form the first fixed part and the first connecting part on both sides of the crease, respectively.

6. The battery pack holder of claim 1, wherein, The fixed support is a plurality of fixed supports, and the plurality of fixed supports are symmetrically arranged along the length direction of the first mounting support.

7. The battery pack holder of claim 1, wherein, The first mounting support comprises a first mounting part, a second mounting part, a second connecting part, and a first supporting part; The second connecting part is arranged above the fixed support and is used to be connected with a battery pack in the battery pack, the first mounting part is arranged between the second connecting part and the fixed support in a spaced manner, the second mounting part is connected between the second connecting part and the first mounting part, and the first supporting part is connected between the fixed support and the first mounting part; The first mounting part has a first mounting surface, and the first mounting position is arranged on the first mounting surface.

8. The battery pack holder of claim 7, wherein, A folded edge bent away from the first mounting surface is arranged along the edge of the first mounting part, and the folded edge is provided with a through-threading hole.

9. The battery pack holder of claim 7, wherein, The battery pack bracket further comprises a second mounting support, the second mounting support comprising a third mounting part and a second supporting part connected with each other, the third mounting part being arranged in a spaced manner with the first mounting part, the third mounting part being connected to the first mounting surface through the second supporting part, the third mounting part having a second mounting surface away from the first mounting surface, and the second mounting surface being provided with a second mounting position.

10. The battery pack holder of claim 9, wherein, At least one of the first mounting part, the second mounting part, and the third mounting part is provided with a through-weight-reducing hole.

11. A battery pack, characterized by, The battery pack bracket comprises a lower box, at least one battery pack, and the battery pack bracket according to any one of claims 1 to 10.

12. The battery pack of claim 11, wherein, The battery pack comprises an electric core stack and an electric core end plate connected to at least one side of the electric core stack, the first mounting support comprises a second connecting part, and the second connecting part is connected to the electric core end plate.

Images