Battery cell vibration test tooling

Abstract

The utility model belongs to the field of battery technology, and discloses a battery cell vibration test tool. The battery cell vibration test tool includes a support assembly and a simulation device, the support assembly is configured to be installed on a vibration device; the simulation device includes a box and a pressurizing mechanism, the box is installed on the support assembly and is used to accommodate the battery cell assembly, the pressurizing mechanism is installed on the box, and the pressurizing mechanism is configured to apply pressure on the peripheral side of the battery cell assembly. The above-mentioned battery cell vibration test tool, by arranging a pressurizing mechanism in the box, the pressurizing mechanism applies pressure in the axial direction of the battery cell assembly, can more realistically simulate the force in the battery pack when multiple battery cells are bonded, especially after the battery cell expands, its actual force direction is mainly perpendicular to the peripheral side, compared with the solution of pressing the battery cell bracket on the table in the prior art, it can better simulate the actual force condition of the battery cell, combined with the setting of the support assembly, it can more realistically simulate the state of the battery cell assembly when there is vibration.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery core vibration testing tool. Background Art

[0002] During the use of batteries, especially automotive power batteries, internal fractures of the battery cells often occur over time, and are usually caused by vibrations during mechanical movement. This phenomenon can only be discovered by disassembling the battery. The vibration tests currently performed are usually aimed at battery packs. The vibration tests on battery packs mainly check the battery welding or the mechanical strength of the battery pack itself, and cannot effectively check whether there are any problems with the battery itself, because the fracture of some pole pieces of a battery cell cannot be quickly reflected in the entire pack, and it will take a certain amount of time or scale to be reflected.

[0003] The vibration test to explore the mechanical strength of the battery cell itself is usually carried out by pressing the end face of the battery (i.e. the surface of the battery with the pole) with a pressure plate to press the battery directly onto the vibration table. This method cannot effectively simulate the mode of the battery in the battery pack or the battery in the working state.

[0004] Therefore, it is urgent to design a battery cell vibration test fixture to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a battery cell vibration test tool, the simulation scene is closer to the working state of the battery cell in use, and the simulation result is more realistic.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Battery cell vibration test tooling, including:

[0008] a support assembly configured to be mounted on a vibrating device;

[0009] The simulation device comprises a box body and a pressurizing mechanism, wherein the box body is installed on the supporting assembly and used to accommodate the battery cell assembly, and the pressurizing mechanism is installed on the box body and configured to apply pressure to the peripheral side of the battery cell assembly.

[0010] As an optional solution, the pressurizing mechanism includes four pressurizing components, which are arranged opposite to each other in pairs and installed in the box body. The pressurizing components include:

[0011] A pressurizing driving member is installed on the corresponding side of the box body;

[0012] The pressure plate is installed at the output end of the pressure driving component, and the pressure driving component can drive the pressure plate to move closer to or away from the corresponding side of the battery core assembly.

[0013] As an optional solution, the pressure plate is detachably connected to the output end of the pressure driving member; or

[0014] The length and / or width of the pressing plate is adjustable.

[0015] As an optional solution, the lowest point of the box is higher than the lowest point of the support assembly, so that the box is suspended relative to the support assembly.

[0016] As an optional solution, the simulation device further comprises a heat exchange plate, which is mounted on the bottom plate of the box body and can support the battery cell assembly, and is used for exchanging heat with the battery cell assembly.

[0017] As an optional solution, a glue layer is provided between the battery core assembly and the heat exchange plate, and the bottom plate of the box body is detachably connected to the enclosure plate of the box body.

[0018] As an optional solution, the above-mentioned support assembly includes:

[0019] A bracket, a plurality of mounting holes are provided at the bottom of the bracket, the mounting holes are configured to be connected to one of the vibration devices, and the box is connected to the top of the bracket.

[0020] As an optional solution, the spacing between adjacent mounting holes is in the range of 90 mm to 110 mm.

[0021] As an optional solution, the support assembly further includes:

[0022] A wire fixing part, installed on the bracket, used for connecting to an external power source;

[0023] A wire has one end connected to the wire fixing member and the other end configured to be connected to the battery cell assembly.

[0024] As an optional solution, the wire fixing piece is U-shaped and is buckled on the bracket. The wire fixing piece is provided with a through hole, and the wire passes through the through hole and comes out from one end of the wire fixing piece.

[0025] The beneficial effects of the utility model are:

[0026] The utility model provides a battery cell vibration test tool, which provides a pressurizing mechanism in a box body. The pressurizing mechanism applies pressure in the circumferential direction of the battery cell assembly, thereby more realistically simulating the stress state in a battery pack when multiple battery cells are bonded together, especially after the battery cells expand, the actual force direction is mainly perpendicular to the circumferential side. Compared with the solution of directly pressing the battery cells on the table in the prior art, it can better simulate the actual stress condition of the battery cells. Combined with the arrangement of the support assembly, it can more realistically simulate the state of the battery cell assembly when there is vibration (for example, when an electric vehicle is in a driving state). BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a battery cell assembly of a battery cell provided by an embodiment of the utility model in a battery cell vibration test tool;

[0028] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0029] Figure 3 It is a schematic diagram of the structure of a battery cell assembly of three battery cells provided in an embodiment of the utility model in a battery cell vibration test fixture.

[0030] In the figure:

[0031] 10. Support assembly; 12. Bracket; 121. Mounting hole; 13. Wire fixing piece; 131. Through hole; 20. Simulation device; 21. Box body; 211. Bottom plate; 212. Enclosure; 22. Pressurizing mechanism; 221. Pressurizing assembly; 2211. Pressurizing drive element; 2212. Pressing plate; 23. Heat exchange plate; 300. Cell assembly; 310. Cell. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] This embodiment provides a battery cell vibration test fixture, the simulation scene of which is closer to the working state of the battery cell 310 in use, and the simulation result is more realistic. Figure 1 As shown, the battery cell vibration test tooling includes a support assembly 10 and a simulation device 20. The support assembly 10 is configured to be installed on a vibration device (not shown in the figure); the simulation device 20 includes a box 21 and a pressurizing mechanism 22. The box 21 is installed on the support assembly 10 and is used to accommodate the battery cell assembly 300. The pressurizing mechanism 22 is installed in the box 21 and is configured to apply pressure on the surrounding side of the battery cell assembly 300. It should be noted that, as shown in FIG. Figure 1 As shown, the battery cell assembly 300 includes a plurality of battery cells 310 . Exemplarily, the battery cells 310 are square battery cells. The surface of the battery cells 310 provided with structures such as poles is the end face of the battery cell 310 , and the four side faces connected to the end face are the peripheral sides of the battery cell 310 .

[0037] The above-mentioned battery cell vibration test tooling, by arranging a pressurizing mechanism 22 in the box body 21, the pressurizing mechanism 22 applies pressure in the axial direction of the battery cell assembly 300, so as to more realistically simulate the force in the battery pack when multiple battery cells 310 are fitted together, especially after the battery cell 310 expands, its actual force direction is mainly perpendicular to the peripheral side. Compared with the solution of directly pressing the battery cell 310 on the table in the prior art, it can better simulate the actual force condition of the battery cell 310. Combined with the setting of the support assembly 10, it can more realistically simulate the state of the battery cell assembly 300 when there is vibration (for example, when the electric vehicle is in a driving state).

[0038] Alternatively, if Figure 1 As shown, the pressurizing mechanism 22 includes four pressurizing components 221, which are arranged opposite to each other in pairs and installed in the box body 21. The pressurizing components 221 include a pressurizing driving member 2211 and a pressing plate 2212. The pressurizing driving member 2211 is installed on the corresponding side of the box body 21; the pressing plate 2212 is installed on the output end of the pressurizing driving member 2211, and the pressurizing driving member 2211 can drive the pressing plate 2212 to move closer to or away from the corresponding side of the battery cell assembly 300. It can be understood that the battery cell assembly 300 consists of a ( Figure 1 shown), two, three ( Figure 3 As shown) or more battery cells 310, several battery cells 310 are arranged in a matrix, so that the battery cell assembly 300 is a cube, the bottom of the battery cell assembly 300 is placed on the bottom plate 211 of the box body 21, and the four pressurizing assemblies 221 respectively pressurize the four sides of the battery cell assembly 300.

[0039] Optionally, the box body 21 is rectangular, and the four side walls of the box body 21 correspond one-to-one to the four pressurizing components 221 , which facilitates the installation of the pressurizing components 221 .

[0040] In this embodiment, the pressurized driving member 2211 is a screw, which is threadedly connected to the corresponding side of the box body 21. One end of the screw is connected to the pressure plate 2212, and the other end is exposed to the outside of the box body 21, so that a person can turn the other end of the screw by hand so that the screw can approach or move away from the battery cell assembly 300 along the extension direction of the screw.

[0041] In another embodiment, the other end of the screw rod can also be connected to the output end of the rotary drive member for automatic control.

[0042] In other embodiments, the pressurizing driving member 2211 may also be any driving element capable of outputting linear motion, such as a cylinder or a linear motor, etc., which is not limited here.

[0043] Optionally, the pressure plate 2212 is detachably connected to the output end of the pressurized driving member 2211. Through the above arrangement, different pressure plates 2212 can be replaced to adapt to the test of different sizes of battery cell assemblies 300 each time, ensuring the force of each battery cell 310 in the battery cell assembly 300. Optionally, the pressure plate 2212 is threadedly connected or clamped to the output end of the pressurized driving member 2211, which is not limited here.

[0044] In another embodiment, the length and / or width of the pressing plate 2212 is adjustable, which can also achieve the change of the size of the pressing plate 2212. Specifically, the pressing plate 2212 includes a pressing plate body and an adjustable portion connected to the pressing plate body, and the adjustable portion is slidably connected to the pressing plate body to change the size of the pressing plate 2212 in the length or width direction.

[0045] Alternatively, if Figure 1 As shown, the lowest point of the box 21 is higher than the lowest point of the support assembly 10, so that the box 21 is suspended relative to the support assembly 10, which can ensure that the vibration transmission of the box 21 is more thorough. Specifically, the bracket 12 is divided into an upper layer and a lower layer connected, and the box 21 is connected to the upper layer of the bracket 12, and the height is less than the height of the bracket 12, so that the box 21 is suspended.

[0046] Alternatively, if Figure 1 As shown, the simulation device 20 also includes a heat exchange plate 23, which is installed on the bottom plate 211 of the box body 21, and the heat exchange plate 23 is used to exchange heat with the battery cell assembly 300. Through the above settings, it is possible to simulate the situation where the heat exchange plate 23 in the battery pack cools the battery cell assembly 300, making the simulation closer to reality.

[0047] Optionally, the simulation device 20 further includes a joint (not shown in the figure), the joint (not shown in the figure) is connected to the liquid inlet or liquid outlet of the heat exchange plate 23 through a pipeline, the box body 21 is provided with a plurality of installation positions, and the joint (not shown in the figure) can be selectively installed at any installation position. Through the above arrangement, after installing the heat exchange plate 23, continue to install other parts, and finally install the joint (not shown in the figure), and select a position that does not interfere with other parts to install the joint (not shown in the figure).

[0048] Optionally, a glue layer is set between the battery cell assembly 300 and the heat exchange plate 23; or a glue layer is set between the battery cell assembly 300 and the bottom plate 211 of the box body 21. It can be understood that in the preparation of the battery pack, thermal conductive glue or structural glue (that is, glue layer) is also often used, and its function is to increase the heat conduction speed or improve the installation stability of the battery cell 310, which is closer to the actual state of the battery pack.

[0049] However, thermal or structural adhesives are often difficult to remove after simulation.

[0050] In order to solve the above problem, in this embodiment, the bottom plate 211 of the box body 21 is detachably connected to the surrounding plate 212 of the box body 21. This allows the box body 21 to be reused, and only a different bottom plate 211 can be replaced each time, eliminating the tedious step of manually removing the glue layer.

[0051] Of course, in other embodiments, a debonding solvent may be used to dissolve and remove the adhesive layer, which is not limited here.

[0052] Alternatively, if Figure 1As shown, the support assembly 10 includes a bracket 12; a plurality of mounting holes 121 are provided at the bottom of the bracket 12, and the mounting holes 121 are configured to be connected to a vibration device, and the box body 21 is connected to the top of the bracket 12. It can be understood that the vibration device is a standard part that is relatively easy to purchase, and there are many types of it. The arrangement of the mounting holes 121 of the bracket 12, one of the plurality of mounting holes 121, a plurality of them, or all of the mounting holes 121 can match the installation positions of vibration devices of different types, and has strong versatility.

[0053] Furthermore, the spacing between adjacent mounting holes 121 ranges from 90 mm to 110 mm. It is understandable that the distance of 90 mm to 110 mm is relatively small, and can be adapted to the vibration equipment with the smallest spacing between mounting positions on the market. At the same time, the spacing between the mounting holes 121 is relatively small, so that multiple connection positions of the bracket 12 can be set, and the connection of the bracket 12 is more stable. Preferably, the spacing between adjacent mounting holes 121 is 100 mm, which is better adapted to the installation size of the standard vibration equipment.

[0054] Alternatively, if Figure 1 and Figure 2 As shown, the battery cell assembly 300 is electrically connected to the external power source through a wire (not shown in the figure), and the support assembly 10 further includes a wire fixing member 13, which is used to fix the wire (not shown in the figure) to the bracket 12. Through the above arrangement, the wire (not shown in the figure) is stably fixed on the bracket 12, and the wire (not shown in the figure) as a whole vibrates synchronously with the battery cell assembly 300, so as to avoid the wire (not shown in the figure) and the battery cell assembly 300 vibrating asynchronously and involving the battery cell 310, thereby damaging the battery cell 310.

[0055] In this embodiment, Figure 2 As shown, the wire fixing part 13 is U-shaped and is buckled on the bracket 12. The wire fixing part 13 is provided with a through hole 131, and the wire passes through the through hole 131 and passes out from one end of the wire fixing part 13. Through the above arrangement, the wire (not shown in the figure) is limited in the corresponding through hole 131, and the effect of preventing the wire (not shown in the figure) from moving is better. In this embodiment, two through holes 131 are provided on each wire fixing part 13. In other embodiments, the number of through holes 131 provided on the wire fixing part 13 can be flexibly set. Optionally, when the number of battery cells 310 in the battery cell assembly 300 is large, the number of wire fixing parts 13 provided on the bracket 12 can be appropriately increased.

[0056] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Battery cell vibration test tooling, characterized in that: include: A support assembly (10) configured to be mounted on a vibrating device; The simulation device (20) comprises a box (21) and a pressurizing mechanism (22), wherein the box (21) is mounted on the support assembly (10) and is used to accommodate the battery cell assembly (300), and the pressurizing mechanism (22) is mounted on the box (21), and is configured to apply pressure to the peripheral side of the battery cell assembly (300).

2. The battery cell vibration test tool according to claim 1, characterized in that: The pressurizing mechanism (22) comprises four pressurizing components (221), wherein the four pressurizing components (221) are arranged opposite to each other in pairs and installed in the box body (21), and the pressurizing components (221) comprise: A pressurizing driving member (2211) is installed on a corresponding side of the box body (21); A pressure plate (2212) is installed at the output end of the pressure driving component (2211), and the pressure driving component (2211) can drive the pressure plate (2212) to move closer to or farther from the corresponding side of the battery cell assembly (300).

3. The battery cell vibration test tool according to claim 2, characterized in that: The pressing plate (2212) is detachably connected to the output end of the pressurizing driving member (2211); or The length and / or width of the pressing plate (2212) is adjustable.

4. The battery cell vibration test fixture according to claim 1, characterized in that: The lowest point of the box body (21) is higher than the lowest point of the support assembly (10), so that the box body (21) is suspended relative to the support assembly (10).

5. The battery cell vibration test tool according to claim 1, characterized in that: The simulation device (20) further comprises a heat exchange plate (23), wherein the heat exchange plate (23) is mounted on the bottom plate (211) of the box body (21) and can support the battery cell assembly (300), and the heat exchange plate (23) is used for exchanging heat with the battery cell assembly (300).

6. The battery cell vibration test tool according to claim 5, characterized in that: A glue layer is provided between the battery cell assembly (300) and the heat exchange plate (23), and the bottom plate (211) of the box body (21) and the enclosure plate (212) of the box body (21) are detachably connected.

7. The battery cell vibration test tool according to any one of claims 1 to 6, characterized in that: The support assembly (10) comprises: A bracket (12), wherein a plurality of mounting holes (121) are provided at the bottom of the bracket (12), wherein the mounting holes (121) are configured to be connected to a vibration device, and the box (21) is connected to the top of the bracket (12).

8. The battery cell vibration test tool according to claim 7, characterized in that: The spacing between adjacent mounting holes (121) ranges from 90 mm to 110 mm.

9. The battery cell vibration test tool according to claim 7, characterized in that: The support assembly (10) further comprises: A wire fixing member (13) is mounted on the bracket (12) and is used for connecting to an external power source; A wire, one end of which is connected to the wire fixing member (13), and the other end of which is configured to be connected to the battery cell assembly (300).

10. The battery cell vibration test fixture according to claim 9, characterized in that: The wire fixing piece (13) is U-shaped and is buckled on the bracket (12). The wire fixing piece (13) is provided with a through hole (131), and the wire passes through the through hole (131) and passes out from one end of the wire fixing piece (13).

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