Power battery pack with anti-vibration effect

Abstract

The utility model relates to the technical field of power battery packs, in particular to a power battery pack with an anti-vibration effect, which comprises a battery box and a plurality of battery modules mounted in the battery box, each battery module comprises end plates arranged at intervals and side plates mounted on two sides of the end plates, a mounting cavity is defined by the end plates and the side plates, a plurality of battery cells are mounted in the mounting cavity, a middle support is arranged between every two adjacent battery cells, and end supports are arranged between the battery cells and the end plates; a soft busbar is arranged between electrodes of two adjacent battery cells, and the end plate is fixed at the bottom of the battery box; the battery module and the whole battery pack are subjected to anti-vibration protection, so that the safety of the whole battery pack in use is improved, and the risks of shaking, collision and the like are effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a power battery pack with an anti-vibration effect. Background Art

[0002] With the continuous development of new energy technology, new energy batteries are widely used, especially new energy power batteries. During the use of power batteries, the charging and discharging current is relatively large, so once leakage occurs, it may cause safety accidents.

[0003] There are many vibration phenomena in the application scenarios of power battery packs. For example, when used in new energy vehicles and engineering equipment, on the one hand, vibration phenomena will occur in the application state. On the other hand, due to the poor vibration reduction system of the installation equipment, severe vibration will occur, which has a greater impact on the power battery pack, especially for engineering equipment with rigid tires, the vibration is more severe. It will cause the power battery cell and the battery pack to shake and collide with each other, which may cause the risk of short circuit of the battery cell, and may cause gaps between the connectors and connectors, further causing arcing, etc., posing a safety risk; if there is no firm fixation, the power battery pack may be slightly displaced due to vibration, etc., and cause failure of the battery system or even accidents.

[0004] Therefore, it is necessary to design a power battery with better anti-vibration effect to improve the safety performance. Utility Model Content

[0005] 1. Technical issues

[0006] The utility model aims to provide a power battery pack with anti-vibration effect, so as to solve the problem of anti-vibration of the battery pack and the battery core and avoid the risks of shaking, collision and the like.

[0007] (II) Technical solution

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A power battery pack with anti-vibration effect, characterized in that: it comprises a battery box and a plurality of battery modules installed in the battery box, the battery modules comprise end plates arranged at intervals and side plates installed on both sides of the end plates, the end plates and the side plates enclose a mounting cavity, a plurality of battery cells are installed in the mounting cavity, an intermediate bracket is provided between two adjacent battery cells, and an end bracket is provided between the battery cells and the end plates;

[0010] A soft busbar is provided between the electrodes of two adjacent battery cells, and the end plate is fixed to the bottom of the battery box.

[0011] Preferably, the end plate and the side plate are made of aluminum alloy, and the middle bracket and the end bracket are made of plastic.

[0012] Preferably, the battery cells are tightly fitted to the intermediate bracket, and a first gap is provided between the battery cells.

[0013] Preferably, there is a second gap between the bottom of the battery cell and the bottom of the battery box.

[0014] Preferably, the battery module further comprises a thermally conductive pad, and the thermally conductive pad is arranged at the bottom of the battery cell.

[0015] Preferably, an insulating top cover is provided on the top of the battery module.

[0016] Preferably, the battery box includes a lower box body and an upper cover, vertical beams are provided at intervals on the side walls of the lower box body, cross beams are provided at intervals on the bottom of the lower box body, and the end plates are fixedly mounted on the cross beams.

[0017] Preferably, an inner concave block is provided at the turning point of the lower box body, a first through hole penetrating the upper cover is provided at the top of the inner concave block, a second through hole is provided at the bottom of the inner concave block, and third through holes are provided at intervals on the side wall of the inner concave block close to the outer side; a first nut located at the first through hole and a second nut located at the third through hole are fixed in the inner concave block.

[0018] Preferably, a bottom bracket arranged along the edge of the bottom of the lower box is fixed to the bottom.

[0019] Preferably, the thickness of the bottom bracket is greater than the thickness of the upper cover.

[0020] The battery cells are isolated and installed in limited positions by using the end brackets and the middle brackets, so that the possibility of collision between the battery cells is reduced, and the bracket structure is used to cover the battery cells to reduce vibration. At the same time, a soft bus is used to connect adjacent battery cells to improve the vibration resistance of the battery cells.

[0021] The battery box structure as a whole has an anti-vibration effect. After the entire battery module is installed at the bottom of the battery box based on the end plate on the bracket structure, the anti-vibration effect of the battery box is used to further protect the battery module from vibration.

[0022] By providing anti-vibration protection for the battery module and the entire battery pack, the safety of the entire battery pack during use is improved, effectively avoiding risks such as shaking and collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the explosion structure of an embodiment of the utility model;

[0024] Figure 2This is a schematic diagram of the explosion structure of the battery module in the embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the bottom-view axial structure of a battery module in an embodiment of the utility model;

[0026] Figure 4 for Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0027] Figure 5 This is a schematic diagram of the top-down axial structure of an embodiment of the utility model;

[0028] Figure 6 This is a schematic diagram of the bottom-view axial structure of an embodiment of the utility model;

[0029] Figure 7 This is a structural schematic diagram of the lower box body in the embodiment of the utility model;

[0030] Figure 8 A schematic diagram of the connection of multiple overlapping power battery packs;

[0031] exist Figures 1 to 8 In the figure, the corresponding relationship between the component names or lines and the figure numbers is as follows:

[0032] Battery box 1, battery module 2, end bracket 21, side plate 22, battery cell 23, middle bracket 24, soft bus 25, end plate 26, thermal pad 27, top cover 28, lower box body 3, upper cover 4, vertical beam 5, horizontal beam 6, inner concave block 7, first through hole 71, second through hole 72, third through hole 73, first nut 74, second nut 75, bottom bracket 8. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0034] See also Figure 1-Figure 3 As shown, in the embodiment of the utility model, a power battery pack with anti-vibration effect is proposed, including a battery box 1 and a plurality of battery modules 2 installed in the battery box 1. The battery box 1 has a sealing effect and adopts a high-strength sheet metal structure to integrate the battery module 2 and related electrical components to form a power battery pack. The specific number of battery modules 2 can be arranged and installed according to actual power requirements.

[0035] Among them, the battery module 2 includes end plates 26 arranged at intervals and side plates 22 installed on both sides of the end plates 26, the end plates 26 and the side plates 22 enclose an installation cavity, and a plurality of battery cells 23 are installed in the installation cavity, and an intermediate bracket 24 is provided between two adjacent battery cells 23, and an end bracket 21 is also provided between the battery cell 23 and the end plate 26 on the same side. The end bracket 21 and the side plate 22 are used to limit the overall front, back, left and right positions of the battery cells 23 after installation, and the intermediate bracket 24 is used to support and isolate the battery cells 23, thereby avoiding the risk of collision between adjacent battery cells 23. It should also be noted that the end plate 26 and the side plate 22 are pre-tightened and connected and then fixed by welding. The frame structure and the limiting edges formed by the upper and lower edges of the side plate 22, the end plate and the end are fixed by positioning pins, thereby forming a certain coating on the battery cell 23, thereby improving the vibration resistance of the entire battery module 2.

[0036] At the same time, the end plate 26 and the side plate 22 are made of aluminum alloy, while the middle bracket 24 and the end bracket 21 are made of plastic. The heat shrinkage phenomenon generated during the operation of the battery cell 23 is utilized to allow the middle bracket 24 and the end bracket 21 to adapt to changes, thereby improving the supporting stability of the battery cell 23 and providing a buffer space.

[0037] A soft busbar 25 is provided between the electrodes of two adjacent cells 23, and an end plate 26 is installed on each of the two end brackets 21, and the end plate 26 is fixed to the bottom of the battery box 1; the soft busbar 25 is used to connect the adjacent cells 23, and when the cells 23 vibrate, the soft busbar 25 is used to buffer, so as to avoid the continuous vibration from affecting the electrical connection between the cells 23, and to maintain the stable electrical connection of the cells 23. At the same time, the end plate 26 is used to install the entire battery module 2 to the bottom of the battery box 1, and the stability of the battery box 1 structure prevents the vibration from being transmitted to the battery module 2.

[0038] In order to further provide buffer space for the battery cell 23 and the entire battery module 2 during vibration and avoid collision, the battery cell 23 and the intermediate bracket 24 are closely fitted, thereby resulting in a first gap between the battery cells 23. The width of the first gap is 2-3 mm, which further prevents the risk of friction between the battery cells 23 during vibration. At the same time, the first gap can also be used to buffer the vibration.

[0039] At the same time, under the support of the middle bracket 24, a second gap is provided between the bottom of the battery cell 23 and the bottom of the battery box 1. The height of the second gap is 1-3 mm, which can prevent the vibration force on the bottom of the battery box 1 from being directly transmitted to the battery cell 23, and can also avoid the risk of deformation or contact friction at the bottom of the battery cell 23.

[0040] In order to dissipate the heat generated by the battery cell 23, the battery module 2 also includes a thermal pad 27, which is arranged at the bottom of the battery cell 23. The thermal pad 27 is used to transfer the heat generated by the battery cell 23 to the battery box 1 and then dissipate it outward. At the same time, the thermal pad 27 can also form a buffering and vibration reduction effect on the entire battery module 2.

[0041] Similarly, an insulating top cover 28 is provided on the top of the battery module 2. On the one hand, the top cover 28 can be provided with an inclined surface or an arc surface to guide out condensed water droplets. On the other hand, the top cover 28 can also be used to protect the top of the battery module 2 to avoid the risk of collision on the top of the battery module 2 when vibration occurs.

[0042] In addition to the vibration reduction design of the battery module 2, the entire battery box 1 structure also needs to have good vibration resistance, specifically, Figure 1 , Figure 5 , Figure 6 , Figure 7 The battery box 1 includes a lower box body 3 and an upper cover 4. Vertical beams 5 are arranged on the side walls of the lower box body 3, and cross beams 6 are arranged at intervals on the bottom of the lower box body 3. The end plate 26 is fixedly installed on the cross beams 6. The cross beams 6 are arranged at the bottom of the lower box body 3 to support and install the battery module 2. The bottom of the lower box body 3 is strengthened and the vibration of the battery module 2 is reduced. At the same time, the vertical beams 5 are arranged to increase the structural strength of the side walls of the battery box 1, which can also improve the overall anti-vibration effect of the battery box 1.

[0043] Thereby, the structural strength of the entire battery box 1 is improved, and shaking of the entire battery pack can be avoided in application scenarios with vibration.

[0044] Generally, power battery packs can be used in groups, and multiple power battery packs can be connected horizontally and vertically and stacked. Figure 1 , Figure 4 As shown, specifically, a concave block 7 is provided at the turning point of the lower box body 3, a first through hole 71 penetrating the upper cover 4 is provided at the top of the concave block 7, a second through hole 72 is provided at the bottom of the concave block 7, and third through holes 73 are provided at intervals on the side wall of the concave block 7 close to the outer side, and a first nut 74 located at the first through hole 71 and a second nut 75 located at the third through hole 73 are fixed in the concave block 7, and a plurality of power battery packs are fixedly connected when they are stacked longitudinally through the first through hole 71, the second through hole 72 and the first nut 74, and are fixedly connected when they are horizontally connected through the third through hole 73 and the second nut 75, so that the plurality of power battery packs can also have a good vibration reduction effect after being fixedly connected, as shown in FIG. Figure 8 The figure shows the application status of multiple power battery packs stacked and spliced.

[0045] The above structure can effectively avoid the influence of friction or collision during the operation of the engineering equipment on the part, thereby effectively protecting its fixing and anti-vibration performance.

[0046] At the same time, in order to avoid adding extra height when the battery power pack is stacked, and to ensure the reliability of the upper and lower connections, such as Figure 6 As shown, a bottom bracket 8 arranged along the edge of the lower box body 3 is fixed at the bottom, and the bottom bracket 8 is used to strengthen the bottom of the lower box body 3. At the same time, the bottom bracket 8 is used to cover the raised part of the upper cover 4, thereby avoiding the waste of extra height and directly improving the vibration resistance of the stacked multiple battery packs with consistency.

[0047] Therefore, the thickness of the bottom bracket 8 is made greater than the thickness of the upper cover 4, ensuring that the upper cover 4 will not be exposed from the bottom bracket 8, further reducing the height of the stacked battery pack and improving space utilization.

[0048] It should also be noted that the battery box 1 is also provided with a circuit board, electrical components, and electrical connection cables, and the electrical circuits not mentioned in this embodiment can directly adopt the existing circuit layout.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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.

[0050] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0051] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A power battery pack with anti-vibration effect, characterized in that: It comprises a battery box and a plurality of battery modules installed in the battery box, wherein the battery modules comprise end plates arranged at intervals and side plates installed on both sides of the end plates, wherein the end plates and the side plates enclose an installation cavity, wherein a plurality of battery cells are installed in the installation cavity, an intermediate bracket is provided between two adjacent battery cells, and an end bracket is provided between the battery cells and the end plates; A soft busbar is provided between the electrodes of two adjacent battery cells, and the end plate is fixed to the bottom of the battery box.

2. A power battery pack with anti-vibration effect according to claim 1, characterized in that: The end plate and the side plate are made of aluminum alloy, and the middle bracket and the end bracket are made of plastic.

3. The power battery pack with anti-vibration effect according to claim 1, characterized in that: The battery cells are tightly fitted to the intermediate support, and a first gap is provided between the battery cells.

4. The power battery pack with anti-vibration effect according to claim 1, characterized in that: A second gap is provided between the bottom of the battery cell and the bottom of the battery box.

5. The power battery pack with anti-vibration effect according to claim 1, characterized in that: The battery module also includes a thermal pad, which is arranged at the bottom of the battery cell.

6. A power battery pack with anti-vibration effect according to any one of claims 1 to 5, characterized in that: An insulating top cover is arranged on the top of the battery module.

7. A power battery pack with anti-vibration effect according to claim 6, characterized in that: The battery box comprises a lower box body and an upper cover, vertical beams are arranged at intervals on the side walls of the lower box body, horizontal beams are arranged at intervals on the bottom of the lower box body, and the end plates are fixedly mounted on the horizontal beams.

8. The power battery pack with anti-vibration effect according to claim 7, characterized in that: The turning points of the lower box body are all provided with inner concave blocks, the top of the inner concave blocks are provided with a first through hole penetrating the upper cover, the bottom of the inner concave blocks are provided with a second through hole, and the side walls of the inner concave blocks close to the outer side are provided with third through holes at intervals; A first nut located at the first through hole and a second nut located at the third through hole are fixed in the inner concave block.

9. The power battery pack with anti-vibration effect according to claim 7, characterized in that: A bottom bracket arranged along the edge of the bottom of the lower box is fixed on the bottom.

10. A power battery pack with anti-vibration effect according to claim 9, characterized in that: The thickness of the bottom bracket is greater than the thickness of the upper cover.

Images