A shock absorbing mechanism for a battery housing

Abstract

The utility model relates to battery shock absorption technical field, concretely relates to a shock attenuation mechanism for battery shell. The utility model discloses: battery shell is used for installing battery assembly, composite vibration isolation subassembly is fixedly installed in the inside bottom area of battery shell, a plurality of composite vibration isolation subassembly is along the battery assembly lower surface symmetry distribution, the composite vibration isolation subassembly includes: the guide sleeve of fixed mounting in the battery shell bottom plate top, the first magnet of fixed mounting in the guide sleeve bottom, the second magnet of sliding installation in the guide sleeve inner wall, the first magnet and the second magnet repel each other, the guide sleeve is still provided with the preloaded spring in, and one end of preloaded spring abuts against the first magnet and the other end abuts against the second magnet, the utility model effectively absorbs and dissipates energy under the environment of different frequency and amplitude vibration, avoids the internal structure damage of battery, prolongs the service life of battery group.

Description

Technical Field

[0001] This utility model relates to the field of battery shock absorption technology, specifically to a shock absorption mechanism for a battery casing. Background Technology

[0002] With increasing demands for battery pack reliability in power tools and electric vehicles, batteries are inevitably subjected to external vibrations and impacts during operation and transportation. Without effective shock absorption measures, this can lead to loosening of individual battery cells, deformation of pressure plates, separation of internal electrodes, electrolyte leakage, and even safety accidents. Current technologies commonly use elastic pads or adhesive pads for direct bonding, but these methods are insufficient for high-frequency vibrations or large impacts and have limited aging resistance, making them unsuitable for long-term use.

[0003] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Utility Model Content

[0004] The purpose of this utility model is to provide a shock-absorbing mechanism for battery casing that can effectively solve the above-mentioned technical problems.

[0005] To achieve the purpose of this utility model, the following technical solution is adopted:

[0006] A vibration damping mechanism for a battery casing includes: a battery casing for mounting a battery assembly; a composite vibration isolation assembly fixedly mounted in the bottom region inside the battery casing; and a plurality of the composite vibration isolation assemblies symmetrically distributed along the lower surface of the battery assembly.

[0007] The composite vibration isolation assembly includes: a guide sleeve fixedly installed on the top of the bottom plate of the battery casing, a first magnet fixedly installed on the bottom of the guide sleeve, and a second magnet slidably installed on the inner wall of the guide sleeve, wherein the first magnet and the second magnet repel each other;

[0008] The guide sleeve is also provided with a preload spring, one end of which abuts against the first magnet and the other end of which abuts against the second magnet.

[0009] Furthermore, the composite vibration isolation assembly also includes: a damping cavity fixedly installed on the top of the bottom plate of the battery casing and located on one side of the guide sleeve; and a piston rod slidably installed in the damping cavity, the top of the piston rod being connected to the bottom of the battery assembly.

[0010] Furthermore, the piston rod is provided with a damping piston head, the outer periphery of which is provided with a sealing ring and a radial flow limiting hole; the damping cavity is filled with damping fluid.

[0011] Furthermore, the guide sleeve is a non-magnetic guide sleeve.

[0012] Furthermore, the damping piston head has a cylindrical structure, and the outer peripheral surface of the damping piston head is provided with at least two radial flow-limiting holes.

[0013] Furthermore, a one-way valve is installed inside the radial flow-limiting orifice.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a composite vibration isolation component to install the battery pack through the battery casing; the composite vibration isolation component is fixedly installed in the bottom area inside the battery casing; multiple composite vibration isolation components are symmetrically distributed along the lower surface of the battery pack; the composite vibration isolation component includes: a guide sleeve fixedly installed on the top of the bottom plate of the battery casing, a first magnet fixedly installed at the bottom of the guide sleeve, and a second magnet slidably installed on the inner wall of the guide sleeve, wherein the first magnet and the second magnet repel each other; a preload spring is also provided inside the guide sleeve, one end of the preload spring abutting against the first magnet and the other end abutting against the second magnet, thereby achieving the technical effect of effectively absorbing and dissipating energy under vibration environments of different frequencies and amplitudes, avoiding damage to the internal structure of the battery, and extending the service life of the battery pack. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0016] Figure 1 This is a schematic diagram of the structure of a shock-absorbing mechanism for a battery casing according to the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of a shock-absorbing mechanism for a battery casing according to the present invention;

[0018] Figure 3 This is a schematic diagram of the internal structure of the guide sleeve of a shock-absorbing mechanism for a battery casing according to the present invention;

[0019] Figure 4 This is a schematic diagram of the internal structure of the damping cavity of a shock-absorbing mechanism for a battery casing according to the present invention.

[0020] In the diagram: 1. Battery casing; 2. Composite vibration isolation assembly; 3. Guide sleeve; 4. First magnet; 5. Second magnet; 6. Preload spring; 7. Damping cavity; 8. Piston rod; 9. Damping piston head; 10. Sealing ring; 11. Radial flow limiting orifice; 12. One-way valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0022] In the description of this utility model, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0023] like Figures 1 to 4 As shown, the present invention provides a shock-absorbing mechanism for a battery casing, comprising: a battery casing 1 for mounting a battery assembly; a composite vibration isolation assembly 2 fixedly mounted in the bottom region inside the battery casing 1; and a plurality of the composite vibration isolation assemblies 2 symmetrically distributed along the lower surface of the battery assembly.

[0024] The composite vibration isolation component 2 includes: a guide sleeve 3 fixedly installed on the top of the bottom plate of the battery casing 1, the guide sleeve 3 being a non-magnetic guide sleeve 3; a first magnet 4 fixedly installed at the bottom of the guide sleeve 3; and a second magnet 5 slidably installed on the inner wall of the guide sleeve 3, the first magnet 4 and the second magnet 5 repelling each other to form a repulsive magnetic force.

[0025] The guide sleeve 3 is also provided with a preload spring 6. One end of the preload spring 6 abuts against the first magnet 4 and the other end abuts against the second magnet 5. The preload spring 6 is used to adjust the initial distance between the magnets so that the second magnet 5 exhibits near-zero or negative stiffness characteristics within a small displacement range.

[0026] The composite vibration isolation assembly 2 further includes: a damping cavity 7 fixedly installed on the top of the bottom plate of the battery casing 1 and located on one side of the guide sleeve 3; a piston rod 8 slidably installed in the damping cavity 7, the top of the piston rod 8 being connected to the bottom of the battery assembly; a damping piston head 9 is provided on the piston rod 8, the outer periphery of the damping piston head 9 is provided with a sealing ring 10, and a radial flow limiting hole 11 is provided; the damping cavity 7 is filled with damping fluid; the damping fluid is silicone oil; the damping piston head 9 moves axially reciprocating within the damping cavity 7 with the relative vibration of the battery assembly, thereby generating damping force through fluid shearing and flow limiting to suppress the relative vibration of the battery assembly.

[0027] The damping piston head 9 has a cylindrical structure, and at least two radial flow-limiting holes 11 are provided on the outer peripheral surface of the damping piston head 9. Preferably, there are 2 to 4 radial flow-limiting holes 11, which are distributed at equal angles along the circumference.

[0028] Each of the radial flow-limiting orifices 11 is equipped with a one-way valve 12. The opening direction of the one-way valves 12 is the same, that is, they open during the springback stroke of the damping piston head 9 and close during the compression stroke.

[0029] The one-way valve 12 includes: a valve plate disposed at the outlet of the radial flow limiting orifice 11, the valve plate covering the radial flow limiting orifice 11 in its natural state; a valve seat formed by an annular groove or protrusion on the body of the damping piston head 9, used to support the valve plate and limit the opening range of the valve plate; and an annular cover plate disposed on the outside of the valve plate to prevent the valve plate from falling off or deforming excessively due to excessive damping fluid pressure.

[0030] Specifically, during the compression stroke of the damping piston head 9, the valve plate is pressed against the valve seat, and the radial flow limiting orifice 11 becomes the main flow limiting channel, generating greater damping; while during the rebound stroke, the damping fluid pushes the valve plate open in the opposite direction, allowing the damping fluid to flow directly through the one-way valve 12, significantly reducing the flow resistance, thereby achieving the effect of heavy damping during compression and light damping during reset.

[0031] A limiting structure can also be provided on the inner wall of the battery casing 1. The limiting structure is respectively set on the extension and retraction trajectory of the second magnet 5 and the piston rod 8, and is used to limit the highest point.

[0032] As can be seen from the above description, this utility model uses a composite vibration isolation component 2 to install the battery pack through the battery casing 1. The composite vibration isolation component 2 is fixedly installed in the bottom area inside the battery casing 1. Multiple composite vibration isolation components 2 are symmetrically distributed along the lower surface of the battery pack. The composite vibration isolation component 2 includes: a guide sleeve 3 fixedly installed on the top of the bottom plate of the battery casing 1, a first magnet 4 fixedly installed at the bottom of the guide sleeve 3, and a second magnet 5 slidably installed on the inner wall of the guide sleeve 3, wherein the first magnet 4 and the second magnet 5 repel each other. A preload spring 6 is also provided inside the guide sleeve 3, with one end of the preload spring 6 abutting against the first magnet 4 and the other end abutting against the second magnet 5. This achieves the technical effect of effectively absorbing and dissipating energy under vibration environments of different frequencies and amplitudes, avoiding damage to the internal structure of the battery, and extending the service life of the battery pack.

[0033] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0034] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A shock-absorbing mechanism for a battery casing (1), characterized in that, include: Battery casing (1), for mounting battery assembly; The composite vibration isolation assembly (2) is fixedly installed in the bottom area inside the battery casing (1); Multiple composite vibration isolation components (2) are symmetrically distributed along the lower surface of the battery assembly; The composite vibration isolation assembly (2) includes: a guide sleeve (3) fixedly installed on the top of the bottom plate of the battery casing (1), a first magnet (4) fixedly installed on the bottom of the guide sleeve (3), and a second magnet (5) slidably installed on the inner wall of the guide sleeve (3), wherein the first magnet (4) and the second magnet (5) repel each other. The guide sleeve (3) is also provided with a preload spring (6), one end of which abuts against the first magnet (4) and the other end of which abuts against the second magnet (5).

2. The shock-absorbing mechanism for a battery casing (1) as described in claim 1, characterized in that, The composite vibration isolation assembly (2) further includes: a damping cavity (7) fixedly installed on the top of the bottom plate of the battery casing (1) and located on one side of the guide sleeve (3); and a piston rod (8) slidably installed in the damping cavity (7), the top of the piston rod (8) being connected to the bottom of the battery assembly.

3. The shock-absorbing mechanism for a battery casing (1) as described in claim 2, characterized in that, The piston rod (8) is provided with a damping piston head (9), and the outer periphery of the damping piston head (9) is provided with a sealing ring (10) and a radial flow limiting hole (11); the damping cavity (7) is filled with damping fluid.

4. The shock-absorbing mechanism for a battery casing (1) as described in claim 1, characterized in that, The guide sleeve (3) is a non-magnetic guide sleeve (3).

5. A shock-absorbing mechanism for a battery casing (1) as described in claim 3, characterized in that, The damping piston head (9) has a cylindrical structure, and the outer peripheral surface of the damping piston head (9) is provided with at least two radial flow-limiting holes (11).

6. The shock-absorbing mechanism for a battery casing (1) as described in claim 3, characterized in that, A one-way valve (12) is installed inside the radial flow-limiting orifice (11).

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