Damping device for lithium battery

Abstract

The utility model is applicable to the technical field of lithium battery vibration reduction, and provides a vibration reduction device for a lithium battery, an inner box is a main storage container of the lithium battery and is used for isolating the lithium battery from a buffer solution to prevent the buffer solution from entering the lithium battery to cause short circuit; the movement direction, relative to the outer box, of the inner box is limited in the height direction of the outer box through the limiting structure, so that the device moves in the height direction of the outer box and does not collide with the outer box under the condition that the device is subjected to external vibration or collision, meanwhile, conduction of external vibration to the inner box is further reduced through the buffer solution, the damping and buffering effects are achieved, and the service life of the device is prolonged. The lithium battery in the inner box is further protected from being influenced by external impact; in addition, compared with vibration reduction in a spring mode, a magnetic attraction mode and the like, the situation that the vibration reduction effect is weakened due to long-time use of the buffer solution is avoided.

Description

Technical Field

[0001] The present application belongs to the technical field of lithium battery vibration reduction, and in particular, relates to a vibration reduction device for lithium batteries. Background Art

[0002] Lithium batteries, used as power batteries for electric vehicles or power-assisted bicycles, often encounter large vibrations during use, causing the lithium battery core to shake inside the battery casing, resulting in damage to the lithium battery and reducing its service life.

[0003] The conventional shock-absorbing solution is to use metal spring materials or a magnet repelling structure, but the fatigue resistance of metal materials is limited and the magnetism of magnets will weaken. Long-term use plus the impact of environmental changes will weaken the buffering effect and the protection of lithium batteries will deteriorate. Utility Model Content

[0004] The present application provides a vibration reduction device for lithium batteries, which can solve the problem that the existing vibration reduction device for lithium batteries has poor vibration reduction effect after long-term use.

[0005] The present application provides a vibration reduction device for a lithium battery, comprising:

[0006] an outer box containing a buffer solution; and

[0007] an inner box, located in the outer box and floating in the buffer, the inner box being used to store lithium batteries; and

[0008] The limiting structure is arranged between the outer box and the inner box, and is used to limit the movement direction of the inner box relative to the outer box in the height direction of the outer box.

[0009] Optionally, the top of the inner box is provided with a storage chamber, which is used to seal the lithium batteries. A flexible protective structure is arranged in the storage chamber to protect the lithium batteries.

[0010] Optionally, the top of the storage chamber has an opening, a flip cover is provided at the opening, the flexible protective structure includes a plurality of elastic spheres, the inner wall of the storage chamber facing the opening is provided with a plurality of elastic spheres, and the side of the flip cover facing the storage chamber is provided with a plurality of elastic spheres so as to elastically clamp the lithium battery through the elastic spheres.

[0011] Optionally, a closed cavity is provided inside the inner box, and the closed cavity is located below the storage chamber.

[0012] Optionally, interconnected through holes are provided around the inner box near the bottom of the inner box.

[0013] Optionally, the limiting structure includes a limiting portion arranged on the outer side of the inner box and a limiting slide groove arranged on the inner side of the outer box, the limiting slide groove extends along its height direction in the outer box, and the limiting portion is slidably arranged in the limiting slide groove.

[0014] Optionally, the buffer is silicone oil.

[0015] The above solution of the present application has the following beneficial effects:

[0016] In the present application, the inner box is the main storage container for lithium batteries, which is used to isolate the lithium batteries from the buffer solution to prevent the buffer solution from entering the lithium batteries and causing a short circuit; the movement direction of the inner box relative to the outer box is limited to the height direction of the outer box through a limiting structure, so that when the device is subjected to external vibration or impact, it moves along the height direction of the outer box without colliding with the outer box. At the same time, the buffer solution further reduces the conduction of external vibration to the inner box, plays a shock absorbing and buffering role, and further protects the lithium batteries in the inner box from external impacts; and, compared with vibration reduction methods such as springs and magnetic suction, the buffer solution will not cause the vibration reduction effect to weaken due to long-term use.

[0017] Other beneficial effects of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the structure of a vibration reduction device for a lithium battery provided in one embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of an inner box provided in one embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of an outer box provided in one embodiment of the present application.

[0022] [Description of Reference Numerals]

[0023] 1. Outer box;

[0024] 11. Cover plate;

[0025] 2. Inner box;

[0026] 21. Storage chamber; 22. Flexible protective structure; 23. Flip cover; 24. Closed cavity; 25. Through hole;

[0027] 3. Limiting structure;

[0028] 31. Limiting portion; 32. Limiting slide groove. DETAILED DESCRIPTION

[0029] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0030] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0031] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0033] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0034] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0035] The conventional shock-absorbing solution is to use metal spring materials or a magnet repelling structure, but the fatigue resistance of metal materials is limited and the magnetism of magnets will weaken. Long-term use plus the impact of environmental changes will weaken the buffering effect and the protection of lithium batteries will deteriorate.

[0036] The vibration reduction device for lithium batteries provided in the present application is exemplarily described below in conjunction with specific embodiments.

[0037] like Figure 1 As shown, the vibration reduction device for lithium batteries provided in the embodiment of the present application includes an outer box 1, an inner box 2 and a limiting structure 3; the outer box 1 contains a buffer solution (not shown in the figure); the inner box 2 is located in the outer box 1 and floats in the buffer solution, and the inner box 2 is used to store lithium batteries; the limiting structure 3 is arranged between the outer box 1 and the inner box 2, and the limiting structure 3 is used to limit the movement direction of the inner box 2 relative to the outer box 1 to the height direction of the outer box 1.

[0038] In this embodiment, the inner box 2 is the main storage container for lithium batteries, which is used to isolate the lithium batteries from the buffer solution to prevent the buffer solution from entering the lithium batteries and causing a short circuit. The movement direction of the inner box 2 relative to the outer box 1 is limited to the height direction of the outer box 1 by the limiting structure 3, so that when the device is subjected to external vibration or impact, it moves along the height direction of the outer box 1 without colliding with the outer box 1. At the same time, the buffer solution further reduces the conduction of external vibration to the inner box 2, plays a shock absorbing and buffering role, and further protects the lithium battery in the inner box 2 from external impact. In addition, compared with vibration reduction by springs, magnetic suction and other methods, the buffer solution will not weaken the vibration reduction effect due to long-term use.

[0039] The buffer is mainly used for buffering and shock absorption of the inner box 2, and the preferred buffer is a non-conductive liquid.

[0040] In one embodiment, if Figure 2 As shown, the top of the inner box 2 is provided with a storage chamber 21, and the storage chamber 21 is used to seal the lithium battery. A flexible protective structure 22 is arranged in the storage chamber 21 to protect the lithium battery.

[0041] In the above embodiment, the storage chamber 21 is mainly used to seal the lithium battery, and the flexible protection structure 22 can absorb part of the energy when the device is vibrated or impacted, thereby reducing the impact force on the lithium battery and extending its service life.

[0042] In a specific embodiment, Figure 2 As shown, the top of the storage chamber 21 has an opening, a flip cover 23 is provided at the opening, the flexible protective structure 22 includes a plurality of elastic spheres, the inner wall of the storage chamber 21 facing the opening is provided with a plurality of elastic spheres, and the flip cover 23 is provided with a plurality of elastic spheres on the side facing the storage chamber 21 so as to elastically clamp the lithium battery through the elastic spheres.

[0043] In the above embodiment, when the lithium battery is loaded through the storage chamber 21, the flip cover 23 can be turned over to open the storage chamber 21, and then the lithium battery is placed in the storage chamber 21 and placed above the multiple elastic balls. After the flip cover 23 is closed, the elastic balls on the flip cover 23 and the elastic balls in the storage chamber 21 elastically clamp the lithium battery. The arrangement of the elastic balls prevents the lithium battery from colliding with the storage chamber 21, and further protects the lithium battery.

[0044] Specifically, the elastic sphere may be made of a polymer material, such as rubber.

[0045] In another specific embodiment, the top of the storage chamber 21 has an opening, a flip cover 23 is provided at the opening, the flexible protective structure 22 includes a first flexible pad and a second flexible pad, the first flexible pad is provided on the inner wall of the storage chamber 21 facing the opening, and the second flexible pad is provided on the side of the flip cover 23 facing the storage chamber 21, so as to elastically clamp the lithium battery by the first flexible pad and the second flexible pad.

[0046] Specifically, the first flexible pad and the second flexible pad may both be rubber pads or sponge pads.

[0047] Specifically, a snap-fit ​​structure is provided between the flip cover 23 and the outer wall of the storage chamber 21 to facilitate the closed snap-fitting of the flip cover 23 and the storage chamber 21 .

[0048] In a specific embodiment, Figure 1 and Figure 3 As shown, the top of the outer box 1 has an opening, and a cover plate 11 is provided at the opening.

[0049] In the above embodiment, covering the cover plate 11 can prevent leakage of the buffer solution, and the inner box 2 can be placed in the outer box 1 or taken out of the outer box 1 through the cover plate 11 .

[0050] In a specific embodiment, Figure 2 As shown, a closed cavity 24 is provided inside the inner box 2 , and the closed cavity 24 is located below the storage chamber 21 .

[0051] In the above embodiment, the closed cavity 24 is used to adjust the buoyancy of the inner box 2 storing the lithium battery pack, so as to ensure that the inner box 2 is in a floating state in the buffer solution.

[0052] In a specific embodiment, Figure 2 As shown, interconnected through holes 25 are provided around the inner box 2 near the bottom of the inner box 2 .

[0053] In the above embodiment, when the inner box 2 is suspended in the buffer solution, part of the buffer solution can enter the through hole 25 from the four sides of the inner box 2, thereby increasing the contact area between the inner box 2 and the buffer solution, thereby increasing the resistance to sinking or floating in the buffer solution along the height direction of the outer box 1 when the inner box 2 is vibrated.

[0054] In a specific embodiment, Figure 2 As shown, the storage chamber 21 , the closed cavity 24 and the through hole 25 are arranged in sequence from top to bottom along the height direction of the inner box 2 .

[0055] In the above embodiment, the storage chamber 21 is exposed to the buffer solution through the structural setting, so as to prevent the buffer solution from entering the storage chamber 21 and causing a short circuit of the lithium battery.

[0056] In one embodiment, if Figure 1 and Figure 3 As shown, the limiting structure 3 includes a limiting portion 31 arranged on the outer side of the inner box 2 and a limiting slide groove 32 arranged on the inner side of the outer box 1. The limiting slide groove 32 extends along its height direction in the outer box 1, and the limiting portion 31 is slidably arranged in the limiting slide groove 32.

[0057] In the above embodiment, a limiting groove 32 extending along the height direction of the outer box 1 is provided in the outer box 1, and a limiting portion 31 provided on the outer side of the inner box 2 is slidably provided in the limiting groove 32, so that when the entire device is impacted, the movement direction of the inner box 2 is limited to the height direction of the outer box 1, so as to better reduce shock through the buffer.

[0058] In another embodiment, the limiting structure 3 includes a sliding hole passing through the inner box 2 and a limiting rod arranged on the inner side of the outer box 1, the extension direction of the sliding hole is parallel to the height direction of the outer box 1, the extension direction of the limiting rod is parallel to the height direction of the outer box 1, and the inner box 2 is slidably set on the limiting rod through the sliding hole.

[0059] In the above embodiment, the structure is set to limit the movement direction of the inner box 2 relative to the outer box 1 to the height direction of the outer box 1.

[0060] In another specific embodiment, a plurality of sliding holes and a plurality of limiting rods are provided.

[0061] In the above embodiment, a plurality of sliding holes and a plurality of limiting rods are provided to increase the stability of the movement of the inner box 2 on the limiting rods.

[0062] Preferably, four sliding holes and four limiting rods are provided, and the four sliding holes are circumferentially arranged at the edge positions of the inner box 2.

[0063] In a preferred embodiment, the buffer is silicone oil.

[0064] In the above embodiment, silicone oil has excellent shear stability and has the function of absorbing vibration and preventing vibration propagation.

[0065] In another embodiment, the buffer may be hydraulic oil.

[0066] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A vibration reduction device for a lithium battery, characterized in that: include: an outer box containing a buffer solution; as well as An inner box, located in the outer box and floating in the buffer, the inner box being used to store lithium batteries; as well as A limiting structure is arranged between the outer box and the inner box, and the limiting structure is used to limit the movement direction of the inner box relative to the outer box in the height direction of the outer box.

2. The vibration reduction device for lithium battery according to claim 1, characterized in that: The top of the inner box is provided with a storage chamber, and the storage chamber is used to seal the lithium battery. A flexible protective structure is arranged in the storage chamber to protect the lithium battery.

3. The vibration reduction device for lithium battery according to claim 2, characterized in that: The top of the storage chamber has an opening, a flip cover is provided at the opening, the flexible protective structure includes a plurality of elastic spheres, a plurality of the elastic spheres are provided on the inner wall of the storage chamber facing the opening, and a plurality of the elastic spheres are provided on the side of the flip cover facing the storage chamber so as to elastically clamp the lithium battery through the elastic spheres.

4. The vibration reduction device for lithium battery according to claim 2, characterized in that: A closed cavity is arranged inside the inner box, and the closed cavity is located below the storage chamber.

5. The vibration reduction device for lithium battery according to any one of claims 1 to 4, characterized in that: Through holes communicating with each other are arranged around the inner box near the bottom of the inner box.

6. The vibration reduction device for lithium battery according to claim 1, characterized in that: The limiting structure includes a limiting portion arranged on the outer side of the inner box and a limiting slide groove arranged on the inner side of the outer box. The limiting slide groove extends in the height direction of the outer box, and the limiting portion is slidably arranged in the limiting slide groove.

7. The vibration reduction device for lithium battery according to claim 1, characterized in that: The buffer solution is silicone oil.

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