Battery pack fixing device, battery pack and electric vehicle

Abstract

The embodiment of the utility model provides a battery pack fixing device, a battery pack and an electric vehicle, and relates to the technical field of battery packs. The battery pack comprises at least one pressing plate and a plurality of side fixing plates, wherein the pressing plate is used for pressing a plurality of battery modules in the battery pack. The plurality of side fixing plates are arranged at intervals; the plurality of side fixing plates are connected with the pressing plate; at least one mounting hole is formed in each side fixing plate; the axis of the mounting hole is perpendicular to the pressing plate, and the side fixing plate is used for connecting the lower shell and the pressing plate. By arranging the pressing plate, the movement of the battery module in the Z direction can be limited, namely the movement of the battery module in the vertical direction can be limited. By arranging the multiple side fixing plates, the multiple battery modules can be laterally limited, the lower shell and the pressing plate can be detachably connected, and mounting, dismounting and maintaining are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery pack fixing device, a battery pack and an electric vehicle. Background Art

[0002] In the power battery industry, the battery pack of new energy vehicles is a complex integrated system, which consists of multiple battery cells combined into a single battery module, and then multiple battery modules are assembled into a battery pack. In order to prevent the battery module from failing during vibration, the battery cell module needs to be completely fixed on the shell when assembling multiple battery modules.

[0003] However, in the existing battery module assembly method, when a large number of battery modules are arranged and the length of the entire battery module is relatively long, the battery module may generate Z-direction vibration, which may cause problems in the entire battery pack, thereby causing failure of the battery system. Utility Model Content

[0004] The utility model provides a battery pack fixing device, a battery pack and an electric vehicle, which can prevent a battery module from moving along the Z direction.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] An embodiment of the utility model provides a battery pack fixing device, which includes:

[0007] At least one pressing plate, the pressing plate being used to press a plurality of battery modules in the battery pack;

[0008] A plurality of side fixing plates are arranged at intervals; the plurality of side fixing plates are connected to the pressure plate; each of the side fixing plates is provided with at least one mounting hole; the axis of the mounting hole is perpendicular to the pressure plate, and the side fixing plates are used to connect the lower shell and the pressure plate.

[0009] In an optional embodiment, the side fixing plate includes a side fixing plate body and a plurality of raised portions, and the side fixing plate body is provided with a plurality of raised portions at intervals; for each of the raised portions, the raised portion is provided with at least one mounting hole; one end of the raised portion is connected to the side fixing plate body, and the other end of the raised portion is used to be connected to the lower shell.

[0010] In an optional embodiment, the side fixing plate is provided with a plurality of first grooves at intervals, and the mounting holes are opened in the first grooves; each of the first grooves is used to place at least one of the pressure plates.

[0011] In an optional embodiment, the battery pack fixing device also includes a fixing assembly, which includes two end plates and at least one screw, the two end plates are respectively used to be arranged on both sides of the multiple battery modules along the parallel direction of the multiple battery modules, and the two end plates are both used to connect to the lower shell; the screw is used to penetrate the two end plates and the multiple battery modules to connect the two end plates and the multiple battery modules.

[0012] In an optional embodiment, for each of the end plates, the end plate includes an end plate body and at least one connecting portion, the end plate body is provided with at least one screw hole, the screw hole is used to install the screw rod; the connecting portion is protruding from the end plate body, the connecting portion is used to connect to the lower shell, and the height of the connecting portion is higher than the height of the lower shell.

[0013] In an optional embodiment, the fixing assembly further includes an intermediate fixing plate, which is used to be arranged between two adjacent battery modules, and the intermediate fixing plate is used to be connected to the lower shell; the intermediate fixing plate is provided with at least one through hole, and the through hole is used to pass the screw.

[0014] In an optional embodiment, the battery pack fixing device also includes a plurality of insulating strips, and the plurality of insulating strips are used to be spaced and laid flat on the upper surface of the plurality of battery modules; the plurality of insulating strips are all located below the pressure plate, and the plurality of insulating strips are arranged perpendicular to the pressure plate.

[0015] In an optional embodiment, the insulating strip is provided with a second groove, and the second groove is used for placing at least one of the pressing plates.

[0016] An embodiment of the utility model further provides a battery pack, comprising an upper shell, a lower shell, a battery pack fixing device as described in any of the above embodiments, and a plurality of battery modules, wherein the upper shell is connected to the lower shell, and the plurality of battery modules are arranged side by side between the upper shell and the lower shell;

[0017] The multiple side fixing plates are located on both sides of the multiple battery modules along the side-by-side direction of the multiple battery modules or between two adjacent battery modules; the multiple side fixing plates are all connected to the lower shell; the pressure plate is located on the upper surface of the multiple battery modules, and the pressure plate is connected to the lower shell through the multiple side fixing plates.

[0018] An embodiment of the utility model further provides an electric vehicle, comprising the battery pack in the above embodiment.

[0019] The beneficial effects of the battery pack fixing device, battery pack and electric vehicle of the embodiment of the utility model include:

[0020] The battery pack fixing device includes at least one pressing plate and multiple side fixing plates. The pressing plate is used to press multiple battery modules in the battery pack. By setting the pressing plate, the movement of the battery module in the Z direction can be limited, that is, the movement of the battery module in the vertical direction can be limited. Multiple side fixing plates are arranged at intervals; multiple side fixing plates are connected to the pressing plate; each side fixing plate is provided with at least one mounting hole; the axis of the mounting hole is perpendicular to the pressing plate, and the side fixing plate is used to connect the lower shell and the pressing plate. By setting multiple side fixing plates, the lateral position of multiple battery modules can be limited, and the detachable connection between the lower shell and the pressing plate can be realized, which is convenient for installation and disassembly and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of a battery pack provided in an embodiment of the present utility model;

[0023] Figure 2 An exploded schematic diagram of a battery pack provided in an embodiment of the present utility model;

[0024] Figure 3 A schematic diagram of a battery pack fixing device provided in an embodiment of the present utility model;

[0025] Figure 4 A schematic diagram of a side fixing plate provided in an embodiment of the utility model;

[0026] Figure 5 A schematic diagram of a fixing assembly provided in an embodiment of the present utility model;

[0027] Figure 6 It is a schematic diagram of an insulating strip provided in an embodiment of the utility model.

[0028] Icons: 1000-battery pack; 100-battery pack fixing device; 110-pressing plate; 120-side fixing plate; 121-side fixing plate body; 122-raising portion; 1221-mounting hole; 123-first groove; 130-fixing assembly; 131-end plate; 1311-end plate body; 13111-screw hole; 1312-connecting portion; 132-screw; 133-middle fixing plate; 1331-through hole; 140-insulating strip; 141-second groove; 200-battery module; 300-lower shell. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0033] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0035] In the power battery industry, the battery pack of new energy vehicles is a complex integrated system, which is composed of multiple battery cells combined into a single battery module, and then multiple battery modules are assembled into a battery pack. In order to prevent the battery module from failing during vibration, the battery cell module needs to be completely fixed on the shell when multiple battery modules are assembled. However, in the existing battery module assembly method, when there are many battery modules and the length of the entire battery module is relatively long, the battery module may generate Z-direction vibration, which may cause problems in the entire battery pack, thereby causing the battery system to fail.

[0036] Based on this, please refer to Figure 1 and Figure 2The battery pack fixing device 100 provided in the embodiment of the utility model can solve the above-mentioned technical problems. The battery pack fixing device 100 is applied to the battery pack 1000. The battery pack 1000 having the battery pack fixing device 100 can be applied to an electric vehicle. The battery pack fixing device 100, the battery pack 1000 and the electric vehicle can prevent the battery module 200 from moving along the Z direction, that is, prevent the battery module 200 from moving along the vertical direction, thereby avoiding failure of the battery system.

[0037] The electric vehicle in this embodiment includes a vehicle body and a battery pack 1000. The battery pack 1000 is disposed in the vehicle body. The battery pack 1000 provides electrical energy for the vehicle body to realize various functions of the vehicle body.

[0038] Figure 1 A schematic diagram of a battery pack 1000 provided in an embodiment of the present utility model; Figure 2 FIG. 1 is an exploded schematic diagram of a battery pack 1000 provided in an embodiment of the present utility model, as shown in FIG. Figure 1 and Figure 2 As shown, the battery pack 1000 provided in this embodiment includes an upper shell (not shown in the figure), a lower shell 300, a battery pack fixing device 100 and a plurality of battery modules 200. The upper shell is connected to the lower shell 300, and the plurality of battery modules 200 are arranged side by side between the upper shell and the lower shell 300. The plurality of side fixing plates 120 are located on both sides of the plurality of battery modules 200 along the direction in which the plurality of battery modules 200 are arranged side by side or between two adjacent battery modules 200; the plurality of side fixing plates 120 are all connected to the lower shell 300; the pressing plate 110 is located on the upper surface of the plurality of battery modules 200, and the pressing plate 110 is connected to the lower shell 300 through the plurality of side fixing plates 120.

[0039] Multiple battery modules 200 are placed side by side in the lower shell 300, multiple pressing plates 110 are placed at intervals on the upper surfaces of the multiple battery modules 200, and then a side fixing plate 120 is respectively arranged on both sides of the multiple battery modules 200, and then the pressing plate 110 is fixed to the lower shell 300 through the side fixing plate 120. That is, threaded fasteners such as bolts are used to connect the pressing plate 110, the side fixing plate 120 and the lower shell 300. Of course, in order to improve the stability of the installation of the pressing plate 110 and prevent the multiple battery modules 200 from moving in the vertical direction, that is, moving along the Z direction, one or more side fixing plates 120 can also be arranged between any two adjacent battery modules 200. The Z direction refers to the arrangement direction of the upper shell, the multiple battery modules 200 and the lower shell 300.

[0040] In order to ensure that the pressure plate 110 is firmly connected to the lower shell 300 and to limit the displacement of the multiple battery modules 200 along the parallel direction of the multiple battery modules 200, the number of the side fixing plates 120 in this embodiment is at least two, which are respectively arranged on both sides of the multiple battery modules 200. The two sides of the multiple battery modules 200 refer to the two ends of two battery modules 200 along the arrangement direction of the multiple battery modules 200. Of course, the number of the side fixing plates 120 can also be three, four, five, etc., which is not limited here. One or more side fixing plates 120 can be set on both sides of the multiple battery modules 200. The number of the side fixing plates 120 set is determined according to the length of the lower shell 300, the thickness of the side fixing plates 120 and the actual requirements for the stability of the battery modules 200, which is not limited here. In addition to setting the side fixing plates 120 on both sides of the multiple battery modules 200, the side fixing plates 120 can also be set at other positions of the multiple battery modules 200, which is determined according to actual needs and is not limited here.

[0041] In addition, the battery pack 1000 may also include a thermal management system. By setting the thermal management system, the temperature of the battery pack 1000 can be within an appropriate range, so that it has a good heat dissipation effect, thereby increasing the service life of the battery and improving the stability and reliability of the battery. The thermal management system can be a structure such as a liquid cooling plate. Of course, the battery pack 1000 may also include components such as a battery management system (BMS) and an electrical system to realize the multiple functions of the battery pack 1000. The battery management system is responsible for monitoring and managing the voltage, current and temperature of the battery cells, balancing the power, preventing over-discharge and overcharging, and extending the service life of the battery. The electrical system generally includes a high-voltage wiring harness and a low-voltage wiring harness, which are responsible for delivering power to various components and transmitting detection signals and control signals in real time.

[0042] The specific structure of the battery pack fixing device 100 will be described in detail below.

[0043] Figure 3 This is a schematic diagram of a battery pack fixing device 100 provided in an embodiment of the present invention. Figure 3 , and combined with Figure 2The battery pack 1000 in this embodiment includes at least one pressing plate 110 and a plurality of side fixing plates 120. The pressing plate 110 is used to press a plurality of battery modules 200 in the battery pack 1000. The plurality of side fixing plates 120 are arranged at intervals; the plurality of side fixing plates 120 are connected to the pressing plate 110; each side fixing plate 120 is provided with at least one mounting hole 1221; the axis of the mounting hole 1221 is perpendicular to the pressing plate 110, and the side fixing plate 120 is used to connect the lower shell 300 and the pressing plate 110. By setting the pressing plate 110, the movement of the battery module 200 in the Z direction can be limited, that is, the movement of the battery module 200 in the vertical direction can be limited. By setting a plurality of side fixing plates 120, the lateral position of the plurality of battery modules 200 can be limited, and the detachable connection between the lower shell 300 and the pressing plate 110 can be realized, which is convenient for installation and disassembly and maintenance.

[0044] When installing the battery pack 1000, after placing multiple battery modules 200 side by side into the lower housing 300, a pressing plate 110 is laid flat on the surface of the battery module 200, and then side fixing plates 120 are arranged on both sides of the multiple battery modules 200. The pressing plate 110 contacts the upper surface of the side fixing plate 120, and the pressing plate 110 is located at the position of the mounting hole 1221 of the side fixing plate 120. Then, threaded fasteners such as bolts are used to pass through the mounting hole 1221 and screwed into the lower housing 300. The pressing plate 110 and the side fixing plate 120 are fixed to the lower housing 300 together, thereby preventing the battery module 200 from moving along the Z direction.

[0045] In order to increase the connection strength and facilitate the connection between the pressing plate 110, the side fixing plate 120 and the lower housing 300, please refer to Figure 4 , and combined with Figure 3 , Figure 4 The side fixing plate 120 provided in the embodiment of the utility model is a schematic diagram. The side fixing plate 120 in the embodiment includes a side fixing plate body 121 and a plurality of raised portions 122. The side fixing plate body 121 is provided with a plurality of raised portions 122 at intervals. For each raised portion 122, the raised portion 122 is provided with at least one mounting hole 1221. One end of the raised portion 122 is connected to the side fixing plate body 121, and the other end of the raised portion 122 is used to connect to the lower shell 300. The height of the raised portion 122 is the distance between the lower shell 300 and the pressing plate 110. By adding the raised portion 122, the height of the lower shell 300 can be reduced when designing the lower shell 300, and it does not have to be flush with the height of the battery module 200. The side fixing plate 120 has a role of raising, moving the installation height of the threaded fastener upward, raising the fixing surface of the threaded fastener such as the bolt, reducing the force on the parts, and thus ensuring the installation strength and stability of the battery pack 1000. And it raises the fixing surface of the threaded fastener, which is also convenient for operators to install.

[0046] Please continue reading Figure 4In order to place the pressing plate 110 on the side fixing plate 120 and to save space in the Z direction, the side fixing plate 120 in this embodiment is provided with a plurality of first grooves 123 at intervals, and the mounting holes 1221 are provided in the first grooves 123; each first groove 123 is used to place at least one pressing plate 110. Specifically, at least one mounting hole 1221 is provided at the position of each first groove 123. Of course, two or more pressing plates 110 can also be placed in one first groove 123 to press the battery module 200 to prevent the battery module 200 from moving along the Z direction and affecting the subsequent use of the battery. The number of pressing plates 110 placed in the first groove 123 can be determined according to specific production needs and production costs, and is not limited here. The number of mounting holes 1221 is the same as the number of pressing plates 110 placed in the first groove 123, and one pressing plate 110 is installed in each mounting hole 1221. The length of the first groove 123 should be greater than or equal to the width of one pressing plate 110. The length of the first groove 123 refers to the length of the first groove 123 perpendicular to the direction in which the plurality of battery modules 200 are arranged side by side. The width of the pressing plate 110 also refers to the length of the pressing plate 110 perpendicular to the direction in which the plurality of battery modules 200 are arranged side by side.

[0047] In addition, in order to facilitate the installation of the pressing plate 110, a groove may also be provided on the surface of each battery module 200 where the module plate contacts the pressing plate 110. The module plate here refers to a mounting plate that surrounds a plurality of battery cells. In order to enable the pressing plate 110 to fit tightly with the battery module 200, thereby achieving a better pressing effect, the contact between the pressing plate 110 and the module plate in this embodiment is coated with structural adhesive. That is, the groove of the module plate is coated with structural adhesive, and the pressing plate 110 is connected and fixed to the module plate by the structural adhesive. In addition, the module plate in this embodiment is connected to the lower shell 300 by structural adhesive, that is, the part where the module plate contacts the lower shell 300 is coated with structural adhesive to achieve the fixation of the module plate and the lower shell 300. Of course, the module plate can also adopt other connection methods, such as threaded connection, etc., which are not limited here.

[0048] When a battery module 200 is long and the battery module 200 may be installed in an irregular shape, the side fixing plate 120 may not be able to completely limit the movement of the battery module 200 along the parallel direction of multiple battery modules 200. The irregular installation means that the battery module 200 has a bend, and there are two or more axes in each row of cells, and at least two axes are not in the same straight line. Therefore, please refer to Figure 5 , and combined with Figure 2 , Figure 5This is a schematic diagram of a fixing assembly 130 provided in an embodiment of the utility model. The battery pack fixing device 100 in this embodiment also includes a fixing assembly 130, and the fixing assembly 130 includes two end plates 131 and at least one screw 132. The two end plates 131 are respectively used to be arranged on both sides of the multiple battery modules 200 along the parallel direction of the multiple battery modules 200, and the two end plates 131 are both used to connect to the lower shell 300; the screw 132 is used to penetrate the two end plates 131 and the multiple battery modules 200 to connect the two end plates 131 and the multiple battery modules 200.

[0049] In this embodiment, the two end plates 131 are arranged at the special-shaped ends of the battery modules 200 or the side fixing plates 120 are not fixed to the two sides of the multiple battery modules 200. The screws 132 pass through the end plates 131 on one side, the multiple battery modules 200 and the end plates 131 on the other side in sequence to fix the multiple battery modules 200.

[0050] To reduce the stress on the connected parts, please continue to refer to Figure 5 In this embodiment, for each end plate 131, the end plate 131 includes an end plate body 1311 and at least one connecting portion 1312. The end plate body 1311 is provided with at least one screw hole 13111, and the screw hole 13111 is used to install the screw rod 132; the connecting portion 1312 is protruding from the end plate body 1311, and the connecting portion 1312 is used to connect with the lower shell 300, and the height of the connecting portion 1312 is higher than the height of the lower shell 300. The height here refers to the length in the Z direction. By setting the connecting portion 1312, the height of the connecting portion 1312 is higher than the lower shell 300, the installation plane of fasteners such as bolts can be raised, and the force of the connecting parts can be reduced, thereby ensuring the installation strength and stability of the battery pack 1000. In addition, raising the fixing surface of the threaded fastener is also convenient for the operator to install. If the connecting portion 1312 of the end plate 131 is substantially flush with the surface of the lower shell 300, it is not convenient to install on the one hand, and on the other hand, it will also increase the force of the threaded fastener.

[0051] In addition, in order to strengthen the position fixing of the battery modules 200 with irregular ends or the battery modules 200 that are not limited by the side fixing plates 120, please continue to refer to Figure 5The fixing assembly 130 in this embodiment further includes an intermediate fixing plate 133, which is used to be arranged between two adjacent battery modules 200, and the intermediate fixing plate 133 is used to connect with the lower shell 300; the intermediate fixing plate 133 is provided with at least one through hole 1331, and the through hole 1331 is used to pass the screw 132. At this time, the screw 132 passes through the end plate 131 on one side, one or more battery modules 200, the intermediate fixing plate 133, one or more battery modules 200 and the end plate 131 on the other side in sequence to fix the multiple battery modules 200. The number of the intermediate fixing plates 133 can be one or more. Multiple intermediate fixing plates 133 can be arranged at intervals between two adjacent battery modules 200. One or more intermediate fixing plates 133 can be arranged between every two battery modules 200, and an intermediate fixing plate 133 can be arranged between some of the two battery modules 200, and no intermediate fixing plate 133 can be arranged between some of the two battery modules 200. The location and number of the intermediate fixing plates 133 are determined by the specific installation and fixing conditions and are not limited here. The intermediate fixing plates 133 can be connected to the lower housing 300 by welding or threaded connection.

[0052] Specifically, the middle fixing plate 133 in this embodiment is a hollow rectangular parallelepiped. In order to raise the fixing plane of the threaded fastener when the middle fixing plate 133 is connected to the lower shell 300 to reduce the force on the threaded fastener, one or more connecting protrusions are provided at the hollow part of the middle fixing plate 133 in this embodiment, one end of the connecting protrusion contacts the lower shell 300, and the other end of the connecting protrusion is flush with the upper surface of the battery module 200, or slightly lower than the upper surface of the battery module 200.

[0053] In order to prevent the pressing plate 110 from contacting the battery module 200 and affecting the normal charging and discharging function of the battery module 200, please refer to Figure 6 , and combined with Figure 2 , Figure 6 This is a schematic diagram of an insulating strip 140 provided in an embodiment of the utility model. The battery pack fixing device 100 in this embodiment also includes a plurality of insulating strips 140, and the plurality of insulating strips 140 are used to be spaced and laid flat on the upper surface of a plurality of battery modules 200; the plurality of insulating strips 140 are all located below the pressing plate 110, and the plurality of insulating strips 140 are arranged perpendicular to the pressing plate 110. In order to save space in the Z direction, the insulating strip 140 in this embodiment is provided with a second groove 141, and the second groove 141 is used to place at least one pressing plate 110. One, two or more pressing plates 110 can be placed in the second groove 141, and the width of the second groove 141 is greater than or equal to the width of at least one pressing plate 110. The length of the insulating strip 140 is the same as the length of the battery module 200, and the length of the insulating strip 140 may also be slightly shorter than the length of the battery module 200, as long as it can play the role of isolating the pressing plate 110.

[0054] According to a battery pack fixing device 100 provided in this embodiment, its working principle is as follows:

[0055] The multiple side fixing plates 120 of the battery pack fixing device 100 are arranged on the sides of the multiple battery modules 200 to limit the multiple battery modules 200 laterally to prevent them from moving left and right. The pressing plate 110 is pressed on the upper surface of the battery module 200 to limit the movement of the multiple battery modules 200 along the Z direction, that is, the vertical direction. The pressing plate 110 is connected to the lower shell 300 of the battery pack 1000 through the side fixing plates 120, so that the pressing plate 110 and the lower shell 300 can be detachably connected, thereby facilitating installation and maintenance.

[0056] In summary, the battery pack 1000 includes at least one pressing plate 110 and a plurality of side fixing plates 120. The pressing plate 110 is used to press a plurality of battery modules 200 in the battery pack 1000. The plurality of side fixing plates 120 are arranged at intervals; the plurality of side fixing plates 120 are connected to the pressing plate 110; each side fixing plate 120 is provided with at least one mounting hole 1221; the axis of the mounting hole 1221 is perpendicular to the pressing plate 110, and the side fixing plate 120 is used to connect the lower shell 300 and the pressing plate 110. By setting the pressing plate 110, the movement of the battery module 200 in the Z direction can be limited, that is, the movement of the battery module 200 in the vertical direction can be limited. By setting a plurality of side fixing plates 120, the lateral position of the plurality of battery modules 200 can be limited, and the detachable connection between the lower shell 300 and the pressing plate 110 can be realized, which is convenient for installation and disassembly and maintenance.

[0057] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack fixing device, characterized in that: include: at least one pressing plate (110), the pressing plate (110) being used to press a plurality of battery modules (200) in a battery pack (1000); A plurality of side fixing plates (120) are arranged at intervals; the plurality of side fixing plates (120) are all connected to the pressing plate (110); each of the side fixing plates (120) is provided with at least one mounting hole (1221); the axis of the mounting hole (1221) is perpendicular to the pressing plate (110); the side fixing plates (120) are used to connect the lower shell (300) and the pressing plate (110).

2. The battery pack fixing device according to claim 1, characterized in that: The side fixing plate (120) comprises a side fixing plate body (121) and a plurality of raised portions (122); the side fixing plate body (121) is provided with a plurality of raised portions (122) at intervals; each of the raised portions (122) is provided with at least one mounting hole (1221); one end of the raised portion (122) is connected to the side fixing plate body (121), and the other end of the raised portion (122) is used to be connected to the lower shell (300).

3. The battery pack fixing device according to claim 1, characterized in that: The side fixing plate (120) is provided with a plurality of first grooves (123) at intervals, and the mounting holes (1221) are opened in the first grooves (123); each of the first grooves (123) is used to place at least one of the pressing plates (110).

4. The battery pack fixing device according to claim 1, characterized in that: The battery pack fixing device (100) further comprises a fixing assembly (130), wherein the fixing assembly (130) comprises two end plates (131) and at least one screw rod (132), wherein the two end plates (131) are respectively used to be arranged on both sides of the multiple battery modules (200) along the parallel direction of the multiple battery modules (200), and the two end plates (131) are both used to be connected to the lower shell (300); and the screw rod (132) is used to penetrate the two end plates (131) and the multiple battery modules (200) to connect the two end plates (131) and the multiple battery modules (200).

5. The battery pack fixing device according to claim 4, characterized in that: For each of the end plates (131), the end plate (131) includes an end plate body (1311) and at least one connecting portion (1312), the end plate body (1311) is provided with at least one screw hole (13111), and the screw hole (13111) is used to install the screw rod (132); the connecting portion (1312) is protruding from the end plate body (1311), and the connecting portion (1312) is used to connect to the lower shell (300), and the height of the connecting portion (1312) is higher than the height of the lower shell (300).

6. The battery pack fixing device according to claim 4, characterized in that: The fixing assembly (130) further comprises an intermediate fixing plate (133), wherein the intermediate fixing plate (133) is used to be arranged between two adjacent battery modules (200), and the intermediate fixing plate (133) is used to be connected to the lower shell (300); the intermediate fixing plate (133) is provided with at least one through hole (1331), and the through hole (1331) is used to pass the screw rod (132).

7. The battery pack fixing device according to claim 1, characterized in that: The battery pack fixing device (100) further comprises a plurality of insulating strips (140), wherein the plurality of insulating strips (140) are used to be spaced and laid flat on the upper surface of the plurality of battery modules (200); the plurality of insulating strips (140) are all located below the pressing plate (110), and the plurality of insulating strips (140) are arranged perpendicular to the pressing plate (110).

8. The battery pack fixing device according to claim 7, characterized in that: The insulating strip (140) is provided with a second groove (141), and the second groove (141) is used for placing at least one of the pressing plates (110).

9. A battery pack, characterized in that: The battery pack fixing device (100) comprises an upper shell, a lower shell (300), a battery pack fixing device (100) according to any one of claims 1 to 8, and a plurality of battery modules (200), wherein the upper shell is connected to the lower shell (300), and the plurality of battery modules (200) are arranged side by side between the upper shell and the lower shell (300); The plurality of side fixing plates (120) are located on both sides of the plurality of battery modules (200) along the direction in which the plurality of battery modules (200) are arranged side by side or between two adjacent battery modules (200); the plurality of side fixing plates (120) are all connected to the lower shell (300); the pressing plate (110) is located on the upper surface of the plurality of battery modules (200), and the pressing plate (110) is connected to the lower shell (300) through the plurality of side fixing plates (120).

10. An electric vehicle, characterized in that: Includes the battery pack (1000) as claimed in claim 9.

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