Battery pack and vehicle

Abstract

The utility model discloses a battery pack and a vehicle, the battery pack comprises a bottom guard plate structure, the bottom guard plate structure comprises an energy absorption layer and a rigid layer which are laminated, the rigid layer is connected to the lower surface of the energy absorption layer through a fastener, and the rigid layer can be detached from the energy absorption layer. According to the battery pack disclosed by the utility model, the maintainability of the bottom protection plate structure of the battery pack is improved and the maintenance cost is reduced while the bottom protection requirement of the battery pack is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric automobile technical field, concretely relates to a battery pack and vehicle. BACKGROUND

[0002] In the prior art, the bottom of the battery pack has a bottom guard plate structure to prevent the bottom of the battery pack from being bumped to damage the battery cells in the battery pack, thereby avoiding safety accidents such as fire caused by thermal runaway of damaged battery cells. The bottom guard plate structure of the existing battery pack includes multiple protective layers bonded or hot-pressed together. When the battery pack is slightly bumped at the bottom, the outer protective layer of the bottom guard plate structure needs to be replaced, which is difficult to disassemble without damage, or the entire bottom guard plate structure needs to be replaced, increasing the difficulty and cost of maintenance. SUMMARY

[0003] The utility model aims to provide a battery pack, at least to some extent, to solve the above technical problems in the prior art, improve the maintainability of the battery pack, and reduce maintenance costs.

[0004] According to the battery pack of the utility model embodiment, the bottom guard plate structure includes an energy-absorbing layer and a rigid layer arranged in layers, the rigid layer is connected to the lower surface of the energy-absorbing layer by a fastener, and the rigid layer can be detached from the energy-absorbing layer.

[0005] Further, the fastener includes a nut and a bolt, the nut is fixed in the energy-absorbing layer, and the rigid layer is fixed to the lower surface of the energy-absorbing layer by the nut and the bolt.

[0006] Further, the fastener further includes a fixing seat, the fixing seat is arranged in the energy-absorbing layer, and the nut is arranged in the fixing seat.

[0007] Further, the fixing seat includes a base and a support portion, the support portion protrudes downward from the base, the nut is a T-shaped nut including a horizontal portion and a vertical portion, the horizontal portion is embedded in the base, and the vertical portion passes through the support portion.

[0008] Further, it further includes a sealing ring, the sealing ring is sleeved on the outer side of the nut and arranged between the support portion and the rigid layer.

[0009] According to some embodiments of the utility model, the energy-absorbing layer is one of MPP foam board, rigid polyurethane foam board, PP honeycomb core board, foamed aluminum plate, and phenolic resin foam board.

[0010] According to some embodiments of the utility model, the fixing seat is made of hard plastic.

[0011] According to some embodiments of the utility model, the rigid layer is a steel plate or an aluminum alloy plate or a glass fiber composite material plate.

[0012] According to the battery pack of some embodiments of the utility model, further include liquid cooling plate, liquid cooling plate is arranged on the upper surface of energy absorbing layer, liquid cooling plate includes plane plate and flow channel plate, flow channel plate is connected with energy absorbing layer.

[0013] The utility model further provides a vehicle with the battery pack.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The bottom guard plate structure of the battery pack improves the maintainability of the bottom guard plate structure of the battery pack, and reduces the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is the partial section schematic view of the bottom structure of the battery pack provided by an embodiment of the utility model;

[0017] Fig. 2 It is the partial schematic view of the bottom structure of the battery pack provided by an embodiment of the utility model.

[0018] BRIEF DESCRIPTION OF DRAWINGS

[0019] 100, bottom guard plate;1, energy absorbing layer;2, rigid layer;3, fastener;31, bolt;32, nut;321, horizontal part;322, vertical part;33, fixed seat;331, base;3311, groove;332, support part;4, sealing ring;5, liquid cooling plate;51, plane plate;52, flow channel plate. DETAILED DESCRIPTION

[0020] In the following description, a lot of specific details are set forth in order to facilitate a thorough understanding of the utility model.However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalization without departing from the connotation of the utility model, therefore the utility model is not limited to the specific implementation disclosed below.

[0021] The utility model embodiment discloses a battery pack, including bottom guard plate structure, for the bottom of the battery pack is protected, prevent the structure of battery pack bottom after being damaged by knocking and lead to the damage of the electric core or electric connection assembly in the battery pack.

[0022] Refer to Figs. 1-2As shown, the utility model provides a kind of embodiment, the battery pack bottom guard plate structure 100 includes energy-absorbing layer 1 and rigid layer 2 of laminated arrangement.Energy-absorbing layer 1 is located close to the side of the battery pack after bottom guard plate structure 100 is applied to battery pack.After battery pack is installed on vehicle, rigid layer 2 is towards ground, rigid layer 2 has suitable hardness, for resisting the impact of gravel etc., keep the appearance of battery pack bottom flat.

[0023] When the bottom of battery pack is more seriously bumped, rigid layer 2 cannot completely resist the energy impact of bumping, impact energy is transmitted to energy-absorbing layer 1, energy-absorbing layer 1 can absorb the energy of impact by deformation collapse, avoid impact energy further to the inside of battery pack transmission, damage the electric core inside battery pack.

[0024] Rigid layer 2 is connected to the lower surface of energy-absorbing layer 1 by fastener 3, rigid layer 2 can be detached from energy-absorbing layer 1, facilitate the maintenance or replacement of rigid layer 2.Specifically, fastener 3 includes bolt 31 and nut 32.Nut 32 is embedded in energy-absorbing layer 1, after rigid layer 2 is attached to the lower surface of energy-absorbing layer 1, rigid layer 2 is fixed to the lower surface of energy-absorbing layer 1 by bolt 31 and nut 32 cooperation.When rigid layer 2 needs to be maintained or replaced, rigid layer 2 can be removed by loosening bolt 31, without damaging energy-absorbing layer 1, convenient maintenance and reduce maintenance cost.

[0025] Further, fastener 3 also includes fixing seat 33, fixing seat 33 is embedded in energy-absorbing layer 1, and has required connection strength with energy-absorbing layer 1.Nut 32 is embedded in fixing seat 33 in advance, and then fixing seat 33 is embedded in energy-absorbing layer 1, so that nut 32 is fixed in energy-absorbing layer 1, to ensure that nut 32 is firmly arranged in energy-absorbing layer 1.

[0026] In an embodiment, fixing seat 33 includes base 331 and support part 332, support part 332 extends downward from base 331 and protrudes from base 331.The cross-sectional area of base 331 is greater than the cross-sectional area of support part 332, and the longitudinal section of fixing seat 33 is T-shaped, so that fixing seat 33 has sufficient connection strength in energy-absorbing layer 1.Nut 32 is T-shaped nut, including horizontal part 321 and vertical part 322.A groove 3311 is formed in base 331, and horizontal part 321 of nut 32 is embedded in groove 3311, and vertical part 322 of nut 32 penetrates support part 332 and partially protrudes from support part 332, so that nut 32 can be firmly fixed in energy-absorbing layer 1.

[0027] In an embodiment, sealing ring 4 is arranged below support part 332, and sealing ring 4 is sleeved on vertical part 322 of nut 32.Sealing ring 4 is clamped between rigid layer 2 and support part 332 of fixing seat 33, and seals the position where lower end of nut 32 abuts against rigid layer 2.

[0028] In the above embodiment, the energy-absorbing layer 1 is one of MPP foamed board, rigid polyurethane board, PP honeycomb core board, foamed aluminum board or phenolic resin foamed board.

[0029] In the above embodiment, the fixing seat 3 is made of hard plastic material, and the fixing seat 3 can be pressed into the energy-absorbing layer 1 of the PP honeycomb board through a hot pressing process. The fixing seat 3 is made of hard plastic material, which reduces the increase of the weight of the battery pack while ensuring the connection strength.

[0030] In the above embodiment, the rigid layer is a steel plate, an aluminum alloy plate or a glass fiber composite material plate. Preferably, the rigid layer 2 is a steel plate, which improves the puncture resistance of the bottom protection plate.

[0031] In one embodiment, the battery pack further comprises a liquid cooling plate 5 arranged on the upper surface of the energy-absorbing layer 1, and the liquid cooling plate 5 comprises a flat plate 51 and a flow channel plate 52, and the flow channel plate 52 is connected with the energy-absorbing layer 1. Specifically, the energy-absorbing layer 1 is a PP honeycomb core board, the liquid cooling plate 5 and the energy-absorbing layer 1 of the PP honeycomb core board are combined together through a hot pressing process, and the upper surface of the PP honeycomb core board is attached to the flow channel plate 52.

[0032] The utility model also provides a vehicle comprising the battery pack of the above embodiment.

[0033] The battery pack provided by the utility model can at least achieve the following beneficial effects: the maintainability of the bottom protection plate structure of the battery pack is improved while meeting the protection requirement of the bottom of the battery pack, and the maintenance cost is reduced.

[0034] It should be noted that the utility model is disclosed as above with the preferred embodiment, but it is not intended to limit the utility model, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be limited by the scope defined by the utility model claim.

Claims

1. A battery pack, characterized by, The bottom protection plate structure comprises an energy-absorbing layer and a rigid layer arranged in a stack, the rigid layer is connected to the lower surface of the energy-absorbing layer by a fastener, and the rigid layer can be detached from the energy-absorbing layer.

2. The battery pack of claim 1, wherein, The fastener comprises a nut and a bolt, the nut is fixed in the energy-absorbing layer, and the rigid layer is fixed to the lower surface of the energy-absorbing layer by the nut and the bolt.

3. The battery pack of claim 2, wherein, The fastener further comprises a fixing seat arranged in the energy-absorbing layer, and the nut is arranged in the fixing seat.

4. The battery pack of claim 3, wherein, The fixing seat comprises a base and a support portion protruding downward from the base, the nut is a T-shaped nut comprising a horizontal portion and a vertical portion, the horizontal portion is embedded in the base, and the vertical portion penetrates the support portion.

5. The battery pack of claim 4, wherein, Further comprising a sealing ring, the sealing ring is sleeved outside the nut and arranged between the support portion and the rigid layer.

6. The battery pack of any one of claims 1-5, wherein, The energy-absorbing layer is one of MPP foam board, rigid polyurethane foam board, PP honeycomb core board, foam aluminum plate or phenolic resin foam board.

7. The battery pack of any one of claims 3-5, wherein, The fixing seat is made of hard plastic.

8. The battery pack of any one of claims 1-5, wherein, The rigid layer is a steel plate or an aluminum alloy plate or a glass fiber composite plate.

9. The battery pack of claim 1, wherein, Further comprising a liquid cooling plate arranged on the upper surface of the energy-absorbing layer, the liquid cooling plate comprises a flat plate and a flow channel plate connected with the energy-absorbing layer.

10. A vehicle characterized by comprising: The vehicle comprises the battery pack according to any one of claims 1-9.

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