Self-adjusting universal type end plate assembly, battery box body and battery module

Abstract

The utility model provides a self-adjusting universal type end plate assembly, a battery box body and a battery module. The self-adjusting universal type end plate assembly comprises a fixed end plate (6) and a fixed end plate (7), wherein a sliding hole (65) is formed in the fixed end plate (6); the sliding rod (3) is arranged in the sliding hole (65) in a penetrating manner and can slide in the sliding hole (65); the first end of the sliding rod (3) is fixedly connected to the adjusting end plate (1); the elastic structure (5) is arranged between the fixed end plate (6) and the adjusting end plate (1) and provides elastic acting force away from the fixed end plate (6) for the adjusting end plate (1); the limiting piece (2) is arranged at the second end of the sliding rod (3), and the limiting piece (2) is located on the side, away from the adjusting end plate (1), of the fixed end plate (6). According to the self-adjusting universal end plate assembly disclosed by the utility model, the expansion force of the battery cell can be self-adjusted, and the stability and the safety of a battery module are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, relate to a kind of self-regulating universal end plate assembly, battery box and battery module. BACKGROUND

[0002] Battery module is a kind of combined structure by multiple battery monomers, and is usually used to store and power equipment electric energy. Battery module can be assembled and customized according to different needs and application scenarios to realize different voltage, capacity and power output. It usually includes battery monomer, battery management system (BMS), shell, connector and other components, which can be conveniently installed and replaced. Battery module is widely used in electric vehicles, energy storage systems, unmanned aerial vehicles and other fields, and is an indispensable part of modern power system.

[0003] Battery module usually includes cell, connector, protection plate, box and other components, and the commonly used way is to connect multiple cells in series or parallel, which can provide higher voltage and capacity output. Multiple cells are arranged in the box and fixed by end plate.

[0004] With the increase of cell cycle times, more heat will be generated inside the battery module, which will cause the cell expansion force to gradually increase. Since the cells are fixed by end plate at both ends of the battery module, the expansion space of the cells is limited and cannot fully release the expansion force. In this case, the continuous extrusion of the cell expansion force will cause cracks, deformation or even rupture of the end plate and the connection between the end plate and the box, thereby affecting the stability and safety of the entire battery module. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a kind of self-regulating universal end plate assembly, battery box and battery module, which can self-regulate cell expansion force and improve the stability and safety of battery module.

[0006] In order to achieve the above purpose, according to one aspect of the utility model, a kind of self-regulating universal end plate assembly is provided, comprising:

[0007] Fixed end plate, sliding hole is opened on fixed end plate;

[0008] Sliding rod, is arranged in sliding hole, and can slide in sliding hole;

[0009] Adjusting end plate, the first end of sliding rod is fixedly connected on adjusting end plate;

[0010] Elastic structure, is arranged between fixed end plate and adjusting end plate, and provides elastic force away from fixed end plate to adjusting end plate;

[0011] The limiting piece is arranged at the second end of the sliding rod, is located at the side of the limiting piece away from the adjusting end plate, and limits the position of the adjusting end plate away from the fixed end plate.

[0012] Further, the limiting piece is a limiting plate, the second end of the sliding rod is provided with a threaded rod segment, the threaded rod segment is installed with a limiting nut, and the limiting nut is arranged at the side of the limiting plate away from the adjusting end plate.

[0013] Further, the sliding rod is provided with a stop step, the limiting plate is stopped on the stop step, the limiting nut is located at the side of the limiting plate away from the stop step, and the limiting plate is locked on the stop step.

[0014] Further, the sliding rod comprises a first rod segment and a second rod segment, the diameter of the first rod segment is greater than that of the second rod segment, the first rod segment and the second rod segment form a stop step at a connecting position, the second rod segment comprises a smooth rod segment and a threaded rod segment, and the length of the smooth rod segment is equal to or greater than the thickness of the limiting plate.

[0015] Further, the first end of the sliding rod is in threaded fixed connection with the adjusting end plate, or the first end of the sliding rod is in an integral structure with the adjusting end plate.

[0016] Further, the two sides of the fixed end plate are respectively provided with mounting blocks, the two mounting blocks are oppositely arranged and form an accommodation space, the limiting piece is arranged in the accommodation space, and the mounting blocks are provided with fixing holes.

[0017] Further, the two sides of the fixed end plate are respectively provided with mounting blocks, the two mounting blocks are oppositely arranged and form an accommodation space, the limiting piece is arranged in the accommodation space, and the mounting blocks are provided with fixing holes.

[0018] Further, the number of the sliding rods is at least two, and the at least two sliding rods are arranged in parallel.

[0019] Further, the elastic structure is a spring, and the spring is sleeved outside the sliding rod.

[0020] According to another aspect of the utility model, a battery box body is provided, which comprises a shell and the self-adjusting universal end plate assembly.

[0021] According to another aspect of the utility model, a battery module is provided, which comprises the self-adjusting universal end plate assembly.

[0022] The technical scheme of the utility model discloses a self-adjusting universal end plate assembly, which comprises a fixed end plate, a sliding hole is formed in the fixed end plate, a sliding rod is arranged in the sliding hole and can slide in the sliding hole, an adjusting end plate is fixedly connected to the first end of the sliding rod, an elastic structure is arranged between the fixed end plate and the adjusting end plate and provides elastic force away from the fixed end plate to the adjusting end plate, and a limiting piece is arranged at the second end of the sliding rod and is located on the side of the fixed end plate away from the adjusting end plate and limits the position of the adjusting end plate away from the fixed end plate. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings constituting a part of the specification of the utility model are used to provide further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model.

[0024] Figure 1 A first axonometric view of the self-adjusting universal end plate assembly of the embodiment of the utility model is shown.

[0025] Figure 2 A second axonometric view of the self-adjusting universal end plate assembly of the embodiment of the utility model is shown.

[0026] Figure 3 A structural schematic view of the self-adjusting universal end plate assembly of the embodiment of the utility model is shown.

[0027] Figure 4 A side structural schematic view of the self-adjusting universal end plate assembly of the embodiment of the utility model is shown.

[0028] Figure 5 An exploded structural schematic view of the self-adjusting universal end plate assembly of the embodiment of the utility model is shown.

[0029] Figure 6 An assembly structure diagram of the adjusting end plate and the limiting piece of the self-adjusting universal end plate assembly of the embodiment of the utility model is shown.

[0030] Figure 7 A perspective structural diagram of the adjusting end plate of the self-adjusting universal end plate assembly according to an embodiment of the present invention is shown.

[0031] Figure 8 A perspective structural diagram of the limiting member of the self-adjusting universal endplate assembly according to an embodiment of the present invention is shown.

[0032] Figure 9 A perspective view of the sliding rod of the self-adjusting universal endplate assembly according to an embodiment of the present invention is shown.

[0033] Figure 10 A perspective view of the fixed end plate of the self-adjusting universal end plate assembly according to an embodiment of the present invention is shown.

[0034] Figure 11 A schematic diagram of the structure of the self-adjusting universal endplate assembly of this utility model before cell expansion is shown; and

[0035] Figure 12 A schematic diagram of the structure of the self-adjusting universal endplate assembly according to an embodiment of the present invention after cell expansion is shown.

[0036] The above figures include the following reference numerals:

[0037] 1. Adjusting end plate; 2. Limiting component; 3. Sliding rod; 31. First rod segment; 32. Second rod segment; 33. Stop step; 34. Threaded rod segment; 35. Plain rod segment; 4. Limiting nut; 5. Elastic structure; 6. Fixed end plate; 61. Mounting block; 62. Accommodation space; 63. Fixing hole; 64. Baffle; 65. Sliding hole. Detailed Implementation

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] See also Figures 1 to 12 As shown, according to an embodiment of the present invention, the self-adjusting universal end plate assembly includes: a fixed end plate 6, on which a sliding hole 65 is provided; a sliding rod 3, which passes through the sliding hole 65 and can slide within the sliding hole 65; an adjusting end plate 1, on which the first end of the sliding rod 3 is fixedly connected; an elastic structure 5, disposed between the fixed end plate 6 and the adjusting end plate 1, and providing an elastic force to the adjusting end plate 1 away from the fixed end plate 6; and a limiting member 2, disposed at the second end of the sliding rod 3, located on the side of the fixed end plate 6 away from the adjusting end plate 1, and limiting the position of the adjusting end plate 1 away from the fixed end plate 6.

[0040] The self-adjusting universal end plate assembly adopts the form that the fixed end plate 6 cooperates with the adjusting end plate 1, the elastic structure 5 is arranged between the fixed end plate 6 and the adjusting end plate 1, the elastic force of the elastic structure 5 is used to apply the elastic force to the adjusting end plate 1, so that the adjusting end plate 1 is pressed and fixed to the battery cell under the elastic action of the elastic structure 5, when the expansion force of the battery cell increases, the adjusting end plate 1 is extruded by the expansion force, the elastic structure 5 is compressed and moves outward, the elastic structure 5 can absorb the outward extrusion force of the adjusting end plate 1 by using the elastic action of itself, and still can provide the elastic action force of the adjusting end plate 1 to press the battery cell, avoiding that the adjusting end plate 1 directly extrudes the fixed end plate 6 by moving outward, realizing the self-adaptive adjustment of the expansion force of the battery cell, effectively protecting the end plate and the box, and improving the stability and safety of the battery module.

[0041] In one embodiment, the elastic structure 5 is replaceably arranged between the fixed end plate 6 and the adjusting end plate 1, so that the specification of the elastic structure 5 can be adjusted as needed, different elastic forces are provided for the adjusting end plate 1, and the battery module with different expansion forces is applicable.

[0042] In one embodiment, the limiting piece 2 is a limiting plate, the second end of the sliding rod 3 is provided with a threaded rod section 34, the threaded rod section 34 is installed with a limiting nut 4, and the limiting nut 4 is arranged on the side of the limiting plate away from the adjusting end plate 1.

[0043] In this embodiment, the limiting piece 2 is a plate-shaped structure, which is installed at the second end of the sliding rod 3, and the sliding position of the limiting piece 2 on the sliding rod 3 can be limited by the limiting nut 4, when the adjusting end plate 1 moves away from the fixed end plate 6 under the elastic force of the elastic structure 5, the limiting piece 2 will be stopped on the side of the fixed end plate 6 away from the adjusting end plate 1, and the limiting piece 2 will not be taken off from the sliding rod 3 due to the limitation of the limiting nut 4, so that the limiting piece 2 can be stopped on the fixed end plate 6, so that the adjusting end plate 1 is limited under the elastic action of the elastic structure 5, preventing the adjusting end plate 1 from taking off from the fixed end plate 6 with the sliding rod 3, and improving the reliability of the movement structure of the adjusting end plate 1.

[0044] In one embodiment, the limiting plate is in sliding fit with the sliding rod 3, and the limiting nut 4 limits the sliding position of the limiting plate on the sliding rod 3. Due to the elastic effect of the elastic structure 5, the limiting plate is pulled by the sliding rod 3 and pressed against the fixed end plate 6. When the elastic structure 5 is compressed, the adjusting end plate 1 moves towards the fixed end plate 6, driving the sliding rod 3 to move synchronously. At this time, the limiting plate can move in the space between the limiting nut 4 and the fixed end plate 6. Since the elastic structure 5 does not abut against the limiting plate, the limiting plate can move freely and will not hinder the movement of the adjusting end plate 1 or the compression process of the elastic structure 5. The adjusting end plate 1 can move towards the fixed end plate 6 under the expansion of the battery cell, providing more expansion space for the battery cell and avoiding excessive extrusion force on the adjusting end plate 1 and the fixed end plate 6.

[0045] In one embodiment, the limiting plate can also be fixedly connected with the sliding rod 3 and fixedly positioned by the limiting nut 4. In this case, when the elastic structure 5 is compressed, the adjusting end plate 1 moves towards the fixed end plate 6, driving the sliding rod 3 to move synchronously. The limiting plate moves synchronously and in the same direction with the adjusting end plate 1, thereby adjusting the position of the adjusting end plate 1, effectively relieving the expansion force of the battery cell and achieving self-adaptive expansion force adjustment of the battery module.

[0046] The fixed connection between the limiting plate and the sliding rod 3 can be bolted connection or clamped connection.

[0047] In one embodiment, the sliding rod 3 is provided with a stop step 33, the limiting plate is stopped on the stop step 33, and the limiting nut 4 is located on the side of the limiting plate away from the stop step 33 and locks the limiting plate on the stop step 33.

[0048] In this embodiment, the limiting plate is provided with a through hole, the diameter of the through hole is smaller than the maximum width of the step surface of the stop step 33, so that the stop step 33 cannot pass through the through hole and is stopped outside the through hole. Due to the fact that the stop step 33 cannot pass through the through hole, under the screwing and extruding action of the limiting nut 4, the limiting plate moves towards the stop step 33 and is pressed tightly on the stop step 33. In this way, the two side surfaces of the limiting plate are pressed tightly by the stop step 33 and the limiting nut 4, respectively, so that the limiting plate is fixed at the stop step 33 of the sliding rod 3, achieving the installation and fixation of the limiting plate on the sliding rod 3.

[0049] In some embodiments, the limiting piece 2 can also be a limiting block or a limiting disc, etc., or other structures that can prevent the sliding rod 3 from being pulled out of the fixed end plate 6.

[0050] In one embodiment, the sliding rod 3 comprises a first rod segment 31 and a second rod segment 32, the diameter of the first rod segment 31 is greater than the diameter of the second rod segment 32, the first rod segment 31 and the second rod segment 32 form a stop step 33 at a connecting position, and the second rod segment 32 comprises a smooth rod segment 35 and a threaded rod segment 34, the length of the smooth rod segment 35 is equal to or greater than the thickness of the limiting plate.

[0051] In the embodiment, the sliding rod 3 is a two-segment structure comprising a first rod segment 31 and a second rod segment 32, both of which are round rods, and the diameter of the first rod segment 31 is greater than the diameter of the second rod segment 32, which facilitates the formation of a stop step 33 at the connecting position of the first rod segment 31 and the second rod segment 32. The diameter of the first rod segment 31 is greater than the diameter of the through hole on the limiting plate, and the diameter of the second rod segment 32 is less than or equal to the diameter of the through hole on the limiting plate, so that the limiting plate can be installed on the second rod segment 32 and stopped by the first rod segment 31. The second rod segment 32 comprises a smooth rod segment 35 and a threaded rod segment 34, wherein the maximum diameter of the threaded rod segment 34 is less than or equal to the diameter of the smooth rod segment 35, the limiting plate can reach the smooth rod segment 35 via the threaded rod segment 34 and be limited at the smooth rod segment 35, and since the limiting plate cooperates with the smooth rod segment 35, it will not damage the threaded rod segment 34, thereby effectively protecting the threaded structure of the threaded rod segment 34.

[0052] In one embodiment, the first end of the sliding rod 3 is fixedly connected with the adjusting end plate 1.

[0053] In one embodiment, the first end of the sliding rod 3 is fixedly connected with the adjusting end plate 1 by screwing. In this embodiment, the first end of the sliding rod 3 is also provided with a threaded structure, and the adjusting end plate 1 is provided with a threaded hole on the side cooperating with the sliding rod 3, the threaded hole is a blind hole, the first end of the sliding rod 3 is screwed with the threaded hole of the adjusting end plate 1, and is limited by the end of the blind hole, thereby effectively preventing the sliding rod 3 from being pulled out of the adjusting end plate 1.

[0054] In one embodiment, the first end of the sliding rod 3 is integrally formed with the adjusting end plate 1. In this embodiment, the first end of the sliding rod 3 and the adjusting end plate 1 can be integrally formed, or can be fixedly connected as a whole by gluing or other means.

[0055] In one embodiment, the fixing end plate 6 is provided with mounting blocks 61 on both sides, the two mounting blocks 61 are oppositely arranged and form an accommodating space 62, the limiting piece 2 is arranged in the accommodating space 62, and the mounting block 61 is provided with a fixing hole 63.

[0056] In the embodiment, the fixing end plate 6 is provided with mounting blocks 61 on both sides of the end face parallel to the plate face of the adjusting end plate 1, and the mounting blocks 61 are provided with fixing holes 63 penetrating through the mounting blocks 61, facilitating the mounting and fixing of the fixing end plate 6 in the box through the fixing holes 63. The two mounting blocks 61 are oppositely arranged and form an accommodating space 62, facilitating the mounting and arrangement of the limiting plate and providing the movement space of the limiting plate.

[0057] In one embodiment, the two mounting blocks 61 are provided with baffles 64 away from the side of the fixing end plate 6, the two baffles 64 extend towards each other, and the interval between the two baffles 64 is smaller than the width of the limiting piece 2 in the distribution direction of the two baffles 64.

[0058] In the embodiment, the baffles 64 are used to limit the movement of the limiting plate in the accommodating space 62, and the movement limitation of the limiting plate in the accommodating space 62 is used to limit the movement position of the adjusting end plate 1 relative to the fixing end plate 6, preventing the movement distance of the adjusting end plate 1 in the direction close to the fixing end plate 6 from being too large to cause the elastic structure 5 to be compressed too much and damaged.

[0059] In one embodiment, the baffles 64 can also be replaced by blocks or rods.

[0060] In one embodiment, the number of the sliding rods 3 is at least two, and the at least two sliding rods 3 are arranged in parallel.

[0061] In the embodiment, the number of the sliding rods 3 is two, which can form more stable support and guidance for the movement of the adjusting end plate 1, and can improve the stability and reliability of the fixing structure of the adjusting end plate 1 to the battery cell.

[0062] In one embodiment, the number of the sliding rods 3 is four, and the four sliding rods 3 are arranged in parallel and in a rectangular shape.

[0063] In one embodiment, the elastic structure 5 is a spring, and the spring is sleeved outside the sliding rod 3.

[0064] The spring can be accurately selected according to the effective number of turns and the single-turn stiffness coefficient, so that the end plate structure is suitable for battery modules with different expansion forces.

[0065] The elastic structure 5 can also be a rubber gasket or other structure with elasticity.

[0066] The working principle of the self-adjusting universal end plate assembly is as follows:

[0067] Before the expansion of the battery cell, the spring is selected according to the effective number of turns and the single-turn stiffness coefficient, so that the elastic force of the spring before compression is equal to the pre-tightening force of the battery cell when entering the box, such as Figure 11When the battery cell is in the initial stage of the cycle, the limiting plate is in close contact with the fixed end plate 6, as shown in (before expansion).

[0068] When the battery cell is in the initial stage of the cycle, the limiting plate is in close contact with the fixed end plate 6, as shown in (before expansion).

[0069] When the battery cell is in the initial stage of the cycle, the limiting plate is in close contact with the fixed end plate 6, as shown in (before expansion). Figure 12 When the battery cell is in the initial stage of the cycle, the limiting plate is in close contact with the fixed end plate 6, as shown in (before expansion).

[0070] According to the embodiment of the utility model, the battery box body includes the shell and the self -adjusting universal formula end plate subassembly, the self -adjusting universal formula end plate subassembly fixedly arranged in the shell.

[0071] According to the embodiment of the utility model, the battery module includes the self -adjusting universal formula end plate subassembly.

[0072] The embodiment of the utility model has following advantages:

[0073] 1、 the utility model discloses simple and compact structure, and the function area is clear, and it is easy to process and dismounts;

[0074] 2、 the utility model discloses the cooperation between the adjusting end plate, the fixed end plate and spring realizes the function that the end plate is self -adjusting according to the module expansion force;

[0075] 3、 the utility model discloses can according to its effective number of turns and single -turn stiffness coefficient to spring accurate selection type, so that the end plate structure is applicable to different expansion force module, realizes the universality of this structure.

[0076] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments consistent with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0077] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments consistent with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0078] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A self-adjusting universal end plate assembly, characterized by, The utility model relates to a self-adjusting universal end plate assembly, comprising: a fixed end plate (6) having a sliding hole (65) formed therein; a sliding rod (3) passing through the sliding hole (65) and capable of sliding in the sliding hole (65); an adjusting end plate (1) to which a first end of the sliding rod (3) is fixedly connected; an elastic structure (5) arranged between the fixed end plate (6) and the adjusting end plate (1) and providing an elastic force to the adjusting end plate (1) away from the fixed end plate (6); a limiting member (2) arranged at a second end of the sliding rod (3), the limiting member (2) being located on a side of the fixed end plate (6) away from the adjusting end plate (1) and limiting the position of the adjusting end plate (1) away from the fixed end plate (6).

2. The self-adjusting universal end plate assembly of claim 1, wherein, The limiting member (2) is a limiting plate, a threaded rod segment (34) is arranged at the second end of the sliding rod (3), the threaded rod segment (34) is provided with a limiting nut (4), and the limiting nut (4) is arranged on a side of the limiting plate away from the adjusting end plate (1).

3. The self-adjusting universal end plate assembly of claim 2, wherein, The sliding rod (3) is provided with a stop step (33), the limiting plate is stopped on the stop step (33), the limiting nut (4) is located on a side of the limiting plate away from the stop step (33), and the limiting nut (4) locks the limiting plate on the stop step (33).

4. The self-adjusting universal end plate assembly of claim 3, wherein, The sliding rod (3) comprises a first rod segment (31) and a second rod segment (32), the diameter of the first rod segment (31) is greater than the diameter of the second rod segment (32), the first rod segment (31) and the second rod segment (32) form the stop step (33) at a connecting position, and the second rod segment (32) comprises a light rod segment (35) and the threaded rod segment (34), the length of the light rod segment (35) is equal to or greater than the thickness of the limiting plate.

5. The self-adjusting universal end plate assembly of claim 1, wherein, The first end of the sliding rod (3) is threadedly fixedly connected with the adjusting end plate (1), or the first end of the sliding rod (3) is an integral structure with the adjusting end plate (1).

6. The self-adjusting universal end plate assembly of any one of claims 1 to 5, wherein, The fixed end plate (6) is provided with mounting blocks (61) on two sides thereof, the two mounting blocks (61) are oppositely arranged and form an accommodating space (62), the limiting member (2) is arranged in the accommodating space (62), and the mounting blocks (61) are provided with fixing holes (63).

7. The self-adjusting universal end plate assembly of claim 6, wherein, The two mounting blocks (61) are provided with baffle plates (64) on sides thereof away from the fixed end plate (6), the two baffle plates (64) extend towards each other, and the interval between the two baffle plates (64) is smaller than the width of the limiting member (2) in the distribution direction of the limiting member (2) between the two baffle plates (64).

8. The self-adjusting universal end plate assembly of any one of claims 1 to 5, wherein, The number of the sliding rods (3) is at least two, and the at least two sliding rods (3) are arranged in parallel.

9. The self-adjusting universal end plate assembly of any one of claims 1 to 5, wherein, The elastic structure (5) is a spring, and the spring is sleeved outside the sliding rod (3).

10. A battery case characterized by comprising: The self-adjusting universal end plate assembly of any one of claims 1 to 9 is fixedly arranged in a shell.

11. A battery module, characterized by The self-adjusting universal end plate assembly of any one of claims 1 to 9.

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