Battery module and electric device

Abstract

Embodiments of the present application provide a battery module and an electric device. The battery module comprises a shell and a damping and buffering mechanism. The shell is used for accommodating at least one battery cell. The damping and buffering mechanism is arranged at one end of the shell. The damping and buffering mechanism comprises a first damping and buffering component and a second damping and buffering component. The first damping and buffering component comprises a displacement member, a first elastic member and a second elastic member. The displacement member is arranged between the first elastic member and the second elastic member. The first elastic member and the second elastic member are connected to the shell at an end away from the displacement member. The second damping and buffering component comprises a support member and a third elastic member. The third elastic member is arranged between the support member and the shell. When the shell moves in the vertical direction, the displacement member is displaced and drives the first elastic member and the second elastic member to deform in opposite directions in the horizontal direction. The present application absorbs the energy generated by vibration by arranging the damping and buffering mechanism at one end of the shell, thereby protecting the battery cell.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery module and an electrical device. Background Technology

[0002] Existing new energy equipment primarily uses electricity as its power source, and its core component includes batteries. Currently, batteries are generally directly connected to new energy equipment. During use or movement, batteries are inevitably subjected to vibration, and sometimes excessive vibration can even cause battery deformation, which is extremely dangerous. Therefore, there is an urgent need to design a device based on battery vibration damping and safety protection to solve these problems. Utility Model Content

[0003] This application provides a battery module and power device, which are designed to dampen and buffer the battery, thereby protecting the battery cell.

[0004] In a first aspect, this application provides a battery module, including a housing and a vibration damping mechanism, wherein the housing is used to accommodate at least one battery cell; The vibration damping and buffering mechanism is disposed at one end of the housing. The vibration damping and buffering mechanism includes a first vibration damping and buffering component and a second vibration damping and buffering component. The first vibration damping and buffering component includes a displacement member, a first elastic member and a second elastic member. The displacement member is disposed between the first elastic member and the second elastic member. The ends of the first elastic member and the second elastic member away from the displacement member are connected to the housing. The second vibration damping and buffer assembly includes a support member and a third elastic member, wherein the third elastic member is disposed between the support member and the housing; When the housing moves vertically, the displacement member is displaced and drives the first and second elastic members to deform in opposite directions in the horizontal direction, while the third elastic member deforms vertically under the action of the housing.

[0005] In this application, by setting a vibration damping and buffering mechanism at one end of the casing, the energy generated by vibration is absorbed and the casing is buffered after vibration, thus avoiding the problem of micro-cracks in the steel or aluminum casing of the battery cell caused by long-term high-frequency vibration, ensuring the integrity of the battery cell and casing, and improving the safety and reliability of the battery module.

[0006] When the housing moves vertically, taking the example of the housing containing the battery cells moving downwards due to gravity caused by vibration, the displacement component, under the action of downward gravity, shifts and drives the first and second elastic components to deform in opposite directions in the horizontal direction. By setting the displacement component, the damping stroke is increased, improving the damping effect. The elastic deformation of the first and second elastic components converts vibration energy into heat energy for dissipation, thereby achieving damping and buffering. When the housing moves downwards, the second damping and buffering assembly provides a vertical damping and buffering path, and the deformation of the third elastic component in the vertical direction provides secondary buffering for the housing, thereby improving the damping and buffering effect.

[0007] Optionally, the battery module further includes a substrate, and the vibration damping mechanism is disposed between the substrate and the housing; The displacement component includes a fixed rod, a first slider, a second slider, a first rotating rod, and a second rotating rod. The fixed rod is disposed on the housing. The first slider and the second slider are slidably disposed on the fixed rod. The first slider is connected to the first elastic element, and the second slider is connected to the second elastic element. The first rotating rod and the second rotating rod are rotatably disposed on the substrate. The end of the first rotating rod away from the substrate is rotatably connected to the first slider; the end of the second rotating rod away from the substrate is rotatably connected to the second slider.

[0008] Taking the example of a housing containing a battery cell being able to move downwards under its own weight due to vibration, the first rotating rod rotates relative to the substrate and the first slider, the second rotating rod rotates relative to the substrate and the second slider, and pushes the first slider and the second slider to slide along the fixed rod. The first slider pushes the first elastic element to compress, and the second slider pushes the second elastic element to compress, thereby achieving vibration damping and buffering of the housing.

[0009] Optionally, the first elastic element and the second elastic element are sleeved on the outer periphery of the fixed rod. The fixed rod supports the first and second elastic elements, facilitating deformation of the first and second elastic elements along the length direction of the fixed rod, i.e., the horizontal direction, and guiding the deformation direction of the first and second elastic elements.

[0010] Optionally, the second vibration damping and buffer assembly further includes a bracket disposed on the housing, the bracket having a receiving cavity with an opening at one end, the opening being located on the side of the bracket away from the housing; the third elastic member is disposed within the receiving cavity; One end of the support member is displaceably disposed within the receiving cavity, and the other end of the support member extends through the opening in a direction away from the housing.

[0011] One end of the support member is displaceably disposed within the receiving cavity, facilitating the transmission of force to the third elastic element. Simultaneously, the sidewall of the receiving cavity provides guidance for the vertical movement of the support member. The other end of the support member extends through the opening away from the housing, preventing the support member from detaching from the bracket and breaking away from the shock-absorbing path of the third elastic element.

[0012] Optionally, the housing includes a frame and an insulating plate. The frame has a slot along its edge, and the insulating plate is disposed within the slot and detachably connected to the frame, facilitating disassembly of the housing and maintenance of the battery cells within the battery module. Precise installation of the insulating plate is achieved by placing it within the slot. Simultaneously, the insulating plate isolates the battery cells from external conductive components, preventing short circuits.

[0013] Optionally, the insulating plate includes a main body and a limiting part. The main body is disposed within the slot, and the limiting part is disposed at one end of the main body, extending beyond the outer edge of the slot and abutting against the frame. By providing the limiting part, positioning and limiting functions are provided for the insulating plate, ensuring the installation accuracy of the insulating plate.

[0014] Optionally, the frame is provided with a first screw hole and a sleeve, and the insulating plate is provided with a second screw hole. The insulating plate is connected to the frame by bolts passing sequentially through the sleeve, the second screw hole, and the first screw hole. The sleeve is fitted around the outer circumference of the bolt. The bolt, the first screw hole, and the second screw hole enable a detachable connection. The sleeve on the frame provides a rotational support point for the bolt, ensuring that the bolt is screwed vertically into the threaded hole.

[0015] Optionally, a limiting block is provided on the bolt, and the limiting block is located inside the sleeve.

[0016] Optionally, the vibration damping and buffering mechanism further includes multiple damping elements, which are disposed at one end of the housing and evenly distributed along the edge of the housing. Through the damping elements and the buffering mechanism, a composite vibration damping structure of elastic and damping elements is achieved, improving the buffering effect.

[0017] Secondly, this application provides an electrical device including the battery module described above, which improves the safety of the electrical device. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a battery module provided in one embodiment of this application; Figure 2 This is a partially exploded view of a battery module provided in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of a vibration damping and buffering mechanism for a battery module according to an embodiment of this application; Figure 4 This is an exploded structural diagram of a vibration damping and buffering mechanism for a battery module provided in one embodiment of this application; Figure 5 This is a partially exploded structural diagram of a battery module provided in one embodiment of this application; Figure 6 This is a partial cross-sectional structural diagram of a battery module provided in one embodiment of this application.

[0019] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Insulating plate; 111. Main body; 112. Limiting part; 113. Second screw hole; 12. Slot; 13. Top plate; 14. Bottom plate; 141. Receiving groove; 15. Sleeve; 16. Bolt; 17. Limiting block; 18. Spring; 2. Battery cells; 31. First vibration damping and buffer assembly; 311. First elastic element; 312. Second elastic element; 313. Fixed rod; 314. First slider; 315. Second slider; 316. First rotating rod; 317. Second rotating rod; 32. Second vibration damping and buffer assembly; 321. Support member; 322. Third elastic member; 323. Bracket; 3231. Receiving cavity; 3232. Opening; 33. Damping components; 4. Substrate; 41. Connecting block. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] One embodiment of this application provides a battery module, including a housing 1 and a vibration damping mechanism 2, wherein the housing 1 is used to accommodate at least one battery cell 2.

[0022] The vibration damping and buffering mechanism is disposed at one end of the housing 1. The vibration damping and buffering mechanism includes a first vibration damping and buffering component 31 and a second vibration damping and buffering component 32. The first vibration damping and buffering component 31 includes a displacement member, a first elastic member 311 and a second elastic member 312. The displacement member is disposed between the first elastic member 311 and the second elastic member 312. The ends of the first elastic member 311 and the second elastic member 312 away from the displacement member are connected to the housing 1.

[0023] The second vibration damping and buffer assembly 32 includes a support member 321 and a third elastic member 322, wherein the third elastic member 322 is disposed between the support member 321 and the housing 1.

[0024] When the housing 1 moves in the vertical direction, the displacement member is displaced and drives the first elastic member 311 and the second elastic member 312 to deform in opposite directions in the horizontal direction, and the third elastic member 322 deforms in the vertical direction under the action of the housing 1.

[0025] In this application, by setting a vibration damping and buffering mechanism at one end of the housing 1, the energy generated by vibration is absorbed and the housing 1 is buffered after vibration, thus avoiding the problem of micro-cracks in the steel or aluminum shell of the battery cell 2 caused by long-term high-frequency vibration, ensuring the integrity of the battery cell 2 and the housing 1, and improving the safety and reliability of the battery module.

[0026] When the housing 1 moves vertically, taking the example where the housing 1 containing the battery cell 2 can move downwards due to its own gravity through vibration, the displacement member is displaced under the action of downward gravity, driving the first elastic member 311 and the second elastic member 312 to deform in opposite directions in the horizontal direction. By setting the displacement member, the vibration damping stroke is increased, and the vibration damping effect is improved. The elastic deformation of the first elastic member 311 and the second elastic member 312 converts vibration energy into heat energy and dissipates it, thereby achieving vibration damping and buffering. When the housing 1 moves downwards, the second vibration damping and buffering assembly 32 provides a vertical vibration damping and buffering path, and the deformation of the third elastic member 322 in the vertical direction provides secondary buffering for the housing 1, thereby improving the vibration damping and buffering effect.

[0027] Furthermore, the vibration damping mechanism can be disposed at least one of the top, bottom, left, and right sides of the housing 1 to improve the buffering effect when the battery module is subjected to impact or vibration in various directions. The number of first vibration damping components 31 can be two, three, or more, as long as they are evenly distributed on the housing 1 to evenly distribute the vibration force on the housing 1. The number of second vibration damping components 32 can be one or more. When it is set to one, the second vibration damping component 32 is disposed at the center of the housing 1 to ensure that the vibration force can be evenly distributed and to prevent the center of gravity of the housing 1 from shifting.

[0028] In one embodiment, the battery module further includes a substrate 4, and the vibration damping mechanism is disposed between the substrate 4 and the housing 1.

[0029] The displacement component includes a fixed rod 313, a first slider 314, a second slider 315, a first rotating rod 316, and a second rotating rod 317. The fixed rod 313 is disposed on the housing 1. The first slider 314 and the second slider 315 are slidably disposed on the fixed rod 313. The first slider 314 is connected to the first elastic member 311, and the second slider 315 is connected to the second elastic member 312.

[0030] The first rotating rod 316 and the second rotating rod 317 are rotatably disposed on the substrate 4. The end of the first rotating rod 316 away from the substrate 4 is rotatably connected to the first slider 314. The end of the second rotating rod 317 away from the substrate 4 is rotatably connected to the second slider 315.

[0031] Taking the example that the housing 1 containing the battery cell 2 can move downwards under its own gravity due to vibration, the first rotating rod 316 rotates relative to the substrate 4 and the first slider 314, the second rotating rod 317 rotates relative to the substrate 4 and the second slider 315, and pushes the first slider 314 and the second slider 315 to slide along the fixed rod 313. The first slider 314 pushes the first elastic member 311 to compress, and the second slider 315 pushes the second elastic member 312 to compress, thereby achieving vibration damping and buffering of the housing 1.

[0032] Furthermore, a connecting block 41 may be provided on the substrate 4 for rotatably connecting with the first rotating rod 316 and the second rotating rod 317. Specifically, the connecting block 41, the first slider 314, and the second slider 315 are provided with rotating shafts. When the housing 1 vibrates, the rotating shafts cooperate with the first rotating rod 316 and the second rotating rod 317 to rotate, thereby realizing a lever-type force amplification effect.

[0033] In an alternative embodiment, a fixing rod 313 is disposed on a base plate 4, and a first rotating rod 316 and a second rotating rod 317 are respectively rotatably connected to the housing 1.

[0034] In one embodiment, the first elastic element 311 and the second elastic element 312 are sleeved on the outer periphery of the fixed rod 313. The fixed rod 313 supports the first elastic element 311 and the second elastic element 312, which facilitates the deformation of the first elastic element 311 and the second elastic element 312 along the length direction of the fixed rod 313, i.e., the horizontal direction, and guides the deformation direction of the first elastic element 311 and the second elastic element 312.

[0035] Specifically, the first elastic element 311, the second elastic element 312, and the third elastic element 322 are springs.

[0036] It should be noted that the first elastic element 311 and the second elastic element 312 can also be elastic rubber or disc springs. In this case, the first elastic element 311 and the second elastic element 312 can be arranged side by side with the fixing rod 313.

[0037] In an alternative embodiment, the first elastic element 311, the second elastic element 312, and the third elastic element 322 may also be dampers.

[0038] In one embodiment, the second vibration damping and buffer assembly 32 further includes a bracket 323 disposed on the housing 1. The bracket 323 has a receiving cavity 3231 with an opening at one end, and the opening 3232 is located on the side of the bracket 323 away from the housing 1. The third elastic member 322 is disposed within the receiving cavity 3231.

[0039] One end of the support member 321 is displaceably disposed within the receiving cavity 3231, and the other end of the support member 321 extends through the opening 3232 in a direction away from the housing 1.

[0040] One end of the support member 321 is displaceably disposed within the receiving cavity 3231, facilitating the transmission of force to the third elastic member 322. Simultaneously, the sidewall of the receiving cavity 3231 provides guidance for the vertical movement of the support member 321. The other end of the support member 321 extends through the opening 3232 away from the housing 1, preventing the support member 321 from detaching from the bracket 323 and breaking away from the shock-absorbing path of the third elastic member 322.

[0041] Specifically, the support member 321 includes a horizontal plate and a vertical plate, which are arranged vertically. The bracket 323 may contain one or more third elastic members 322.

[0042] Furthermore, the bracket 323 can be positioned between the first slider 314 and the second slider 315, and connected to the fixing rod 313, thereby reducing the area occupied by the housing 1. The bracket 323 can also be positioned on one side of the fixing rod 313.

[0043] In one embodiment, the housing 1 includes a frame and an insulating plate 11. A slot 12 is provided on the edge of the frame, and the insulating plate 11 is disposed within the slot 12 and detachably connected to the frame, facilitating the disassembly of the housing 1 and the maintenance of the battery cell 2 within the battery module. By placing the insulating plate 11 within the slot 12, precise installation of the insulating plate 11 is achieved. Simultaneously, the insulating plate 11 on the housing 1 isolates the battery cell 2 from external conductive components, preventing short circuits.

[0044] Furthermore, the frame includes a top plate 13 and a bottom plate 14. The bottom plate 14 is provided with a plurality of receiving slots 141 for accommodating the battery cell 2. The top plate 13 is used to fix the battery cell 2 to ensure the firmness of the battery cell 2 after installation and to protect the battery cell 2 from external impact.

[0045] Specifically, a groove is provided at the bottom of the base plate 14, and the vibration damping and buffering mechanism is set in the groove to avoid the vibration damping and buffering mechanism being exposed.

[0046] In one embodiment, the insulating plate 11 includes a main body 111 and a limiting part 112. The main body 111 is disposed within the slot 12, and the limiting part 112 is disposed at one end of the main body 111, extending beyond the outer edge of the slot 12 and abutting against the frame. By providing the limiting part 112, positioning and limiting functions are provided for the insulating plate 11, ensuring the installation accuracy of the insulating plate 11.

[0047] In one embodiment, the frame is provided with a first screw hole and a sleeve 15, and the insulating plate 11 is provided with a second screw hole 113. The insulating plate 11 is connected to the frame by a bolt 16 passing sequentially through the sleeve 15, the second screw hole 113, and the first screw hole. The sleeve 15 is fitted around the outer periphery of the bolt 16. The bolt 16, the first screw hole, and the second screw hole 113 enable a detachable connection. The sleeve 15 on the frame provides a rotational support point for the bolt 16, ensuring that the bolt 16 is screwed vertically into the threaded hole.

[0048] In one embodiment, a limiting block 17 is provided on the bolt 16. The limiting block 17 is disposed inside the sleeve 15 to limit the rotational stroke of the bolt 16 and prevent it from coming out of the sleeve 15.

[0049] In one embodiment, a spring 18 is provided on the bolt 16. The spring 18 is sleeved on the outer periphery of the bolt 16 and located between the end of the bolt 16 and the limiting block 17 to prevent the bolt 16 from loosening.

[0050] In the above embodiment, when the battery cell 2 inside the housing 1 is damaged and needs to be disassembled and repaired, the bolt 16 can be reversed so that the front end of the bolt 16 can be removed from the first screw hole and the second screw hole 113. At this time, the bolt 16 will also push the limiting block 17 to squeeze the spring 18 on the bolt 16. When the bolt 16 is removed, the insulating plate 11 is pulled upward so that the insulating plate 11 can be pulled out from the slot 12, and the disassembly is completed. Then, the top plate 13 is lifted upward and the battery cell 2 can be removed for replacement. After replacement, the top plate 13 is placed on the surface of the battery cell 2, and the insulating plate 11 is inserted through the slot 12 of the top plate 13 and the bottom plate 14. The bolt 16 is then tightened so that the front end of the bolt 16 can enter the first screw hole and the second screw hole 113 for fixation. At the same time, the spring 18 on the bolt 16 will also push the limiting block 17 with its own elasticity to prevent the bolt 16 from loosening, thereby improving the firmness of the bolt 16 and solving the problem that the existing battery module cannot quickly disassemble and replace the battery cell 2.

[0051] In one embodiment, the vibration damping and buffering mechanism further includes a plurality of damping elements 33, which are disposed at one end of the housing 1 and evenly distributed along the edge of the housing 1. Through the damping elements 33 and the buffering mechanism, a composite vibration damping structure of elastic element-damping element 33 is achieved, improving the buffering effect. Specifically, the damping element 33 is a damper.

[0052] Specifically, the damping element 33 is connected between the housing 1 and the base plate 4.

[0053] In the above embodiments, when vibration occurs during vehicle operation or equipment operation, the vibration force causes the battery cell 2 to move downwards due to its own gravity. At this time, the first rotating rod 316 rotates relative to the substrate 4 and the first slider 314, and the second rotating rod 317 rotates relative to the substrate 4 and the second slider 315, pushing the first slider 314 and the second slider 315 to slide along the fixed rod 313. The first slider 314 pushes the first elastic member 311 to compress, and the second slider 315 pushes the second elastic member 312 to compress, thereby achieving vibration damping and buffering of the housing 1. At the same time, the support member 321 compresses the third elastic member 322 under the compression of the substrate 4, and works with the damper on the substrate 4 to play a role in vibration damping and buffering.

[0054] One embodiment of this application provides an electrical device including the battery module described above, which improves the safety of the electrical device. Exemplary examples include, but are not limited to, mobile devices (e.g., mobile phones, laptops, etc.), electric vehicles (e.g., pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc.), electric trains, ships and satellites, energy storage systems, aircraft, and robots.

[0055] In this application, "multiple" refers to two or more.

[0056] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0057] The terms “first,” “second,” “third,” etc., in this application (if applicable) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0058] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0059] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery module, characterized in that, Includes a housing and a vibration damping mechanism, the housing being used to house at least one battery cell; The vibration damping and buffering mechanism is disposed at one end of the housing. The vibration damping and buffering mechanism includes a first vibration damping and buffering component and a second vibration damping and buffering component. The first vibration damping and buffering component includes a displacement member, a first elastic member and a second elastic member. The displacement member is disposed between the first elastic member and the second elastic member. The ends of the first elastic member and the second elastic member away from the displacement member are connected to the housing. The second vibration damping and buffer assembly includes a support member and a third elastic member, wherein the third elastic member is disposed between the support member and the housing; When the housing moves vertically, the displacement member is displaced and drives the first and second elastic members to deform in opposite directions in the horizontal direction, while the third elastic member deforms vertically under the action of the housing.

2. The battery module according to claim 1, characterized in that, The battery module also includes a substrate, and the vibration damping mechanism is disposed between the substrate and the housing; The displacement component includes a fixed rod, a first slider, a second slider, a first rotating rod, and a second rotating rod. The fixed rod is disposed on the housing. The first slider and the second slider are slidably disposed on the fixed rod. The first slider is connected to the first elastic element, and the second slider is connected to the second elastic element. The first rotating rod and the second rotating rod are rotatably disposed on the substrate. The end of the first rotating rod away from the substrate is rotatably connected to the first slider; the end of the second rotating rod away from the substrate is rotatably connected to the second slider.

3. The battery module according to claim 2, characterized in that, The first elastic element and the second elastic element are sleeved on the outer periphery of the fixed rod.

4. The battery module according to claim 1, characterized in that, The second vibration damping and buffer assembly further includes a bracket, which is disposed on the housing and has a receiving cavity with an opening at one end, the opening being located on the side of the bracket away from the housing; the third elastic element is disposed within the receiving cavity; One end of the support member is displaceably disposed within the receiving cavity, and the other end of the support member extends through the opening in a direction away from the housing.

5. The battery module according to claim 1, characterized in that, The housing includes a frame and an insulating plate. The frame has a slot on its edge, and the insulating plate is disposed in the slot and detachably connected to the frame.

6. The battery module according to claim 5, characterized in that, The insulating plate includes a main body and a limiting part. The main body is disposed in the slot, and the limiting part is disposed at one end of the main body. The limiting part extends out of the outer edge of the slot and abuts against the frame.

7. The battery module according to claim 5, characterized in that, The frame is provided with a first screw hole and a sleeve, and the insulating plate is provided with a second screw hole. The insulating plate is connected to the frame by bolts passing through the sleeve, the second screw hole, and the first screw hole in sequence. The sleeve is fitted around the outer periphery of the bolt.

8. The battery module according to claim 7, characterized in that, A limit block is provided on the bolt, and the limit block is located inside the sleeve.

9. The battery module according to claim 1, characterized in that, The vibration damping and buffering mechanism also includes multiple damping elements, which are disposed at one end of the housing and are evenly distributed along the edge of the housing.

10. An electrical appliance, characterized in that, Includes the battery module as described in any one of claims 1-9.

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