Protective structure for power storage device

Abstract

To provide a protection structure of a power storage device in which non-waterproof equipment of the power storage device is hardly affected by water in a state where the power storage device is mounted on a vehicle.SOLUTION: In the protection structure of the power storage device (1) according to one aspect of the present disclosure, the power storage device (1) is disposed above the recessed portion (7a) disposed in the vehicle (2) with an interval with respect to the recessed portion (7a), and the sheet member (10) is disposed so as to cover a space between an end portion of the battery case (4) on a side where the non-waterproof device (5) protrudes from the battery case (4) and an end portion of the recessed portion (7a) on a side where the non-waterproof device (5) protrudes from the battery case (4) when viewed from the front-rear direction of the vehicle (2), the sheet member (10) hangs down from a position below the non-waterproof device (5) at an end portion of the battery case (4) on the side where the non-waterproof device (5) protrudes from the battery case (4).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a protective structure for an electricity storage device, for example, a protective structure for an electricity storage device mounted on a vehicle in which non-waterproof equipment protrudes forward or rearward from a battery case. [Background technology]

[0002] It is preferable that the power storage device is configured to be less susceptible to adverse effects of water. For example, the power storage device of Patent Document 1 has a sloped portion formed in the lower case of the battery case, which causes water that has entered the battery case to accumulate in a position away from the battery module, thereby making it less susceptible to adverse effects of water on the battery module. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-128925 Summary of the Invention [Problem to be solved by the invention]

[0004] The present applicant has found the following problem: In general, when an electric storage device is mounted on a vehicle, non-waterproof devices protrude due to considerations such as ease of maintenance. Therefore, it is preferable that the non-waterproof devices of the electric storage device be configured so as not to be adversely affected by water when the electric storage device is mounted on a vehicle.

[0005] The present disclosure provides a protective structure for an electricity storage device that makes it difficult for non-waterproof components of the electricity storage device to be adversely affected by water when the electricity storage device is mounted on a vehicle. [Means for solving the problem]

[0006] A protective structure for an electric storage device according to one aspect of the present disclosure is a protective structure for an electric storage device that is mounted on a vehicle and in which a non-waterproof device protrudes forward or rearward from a battery case, the power storage device is disposed above a recess provided in the vehicle and at a distance from the recess, a sheet member is arranged to cover a portion between an end of the battery case on a side where the non-waterproof device protrudes from the battery case and an end of the recess on a side where the non-waterproof device protrudes from the battery case, as viewed from the front-rear direction of the vehicle; The sheet member hangs down from an end of the battery case on the side where the non-waterproof device protrudes from the battery case, and from a position below the non-waterproof device.

[0007] In the above-described protective structure for an electric storage device, it is preferable that a lower end of the sheet member hangs down from the recess on the side where the non-waterproof device protrudes from the battery case.

[0008] In the protective structure for the power storage device described above, the recess is formed in a floor panel of the vehicle, a cross member of the vehicle is disposed on a side of the recess where the non-waterproof device protrudes from the battery case; It is preferable that the lower end of the sheet member hangs down from the cross member on the side where the non-waterproof device protrudes from the battery case.

[0009] In the protective structure for an electricity storage device described above, a wall portion is disposed on a side of the sheet member where the non-waterproof device protrudes from the battery case, It is preferable that a lower end portion of the seat member is disposed between the wall portion and the cross member in the front-rear direction of the vehicle.

[0010] In the protective structure for the electric storage device described above, the electric storage device is disposed between a seat and a floor panel of the vehicle in a vertical direction of the vehicle, the wall portion is a seat trim of the vehicle, When the seat member rotates around the upper end of the seat member, the lower end of the seat member preferably comes into contact with the seat trim. [Effects of the Invention]

[0011] According to the present disclosure, it is possible to realize a protective structure for an electricity storage device that makes it difficult for non-waterproof components of the electricity storage device to be adversely affected by water when the electricity storage device is mounted on a vehicle. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram showing a simplified protective structure for an electricity storage device according to an embodiment; [Figure 2] 1 is a simplified view showing a state in which water has accumulated in a recess of a floor panel in a protective structure for an electric storage device according to an embodiment; [Figure 3] 10A and 10B are diagrams illustrating, in a simplified manner, how water flows out from a recess in a floor panel in the protective structure for an electric storage device according to the embodiment. [Figure 4] 10A and 10B are diagrams illustrating, in a simplified manner, how non-waterproof devices of the electricity storage device are protected from water by a sheet member in the protective structure for the electricity storage device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] Specific embodiments to which the present disclosure is applied will be described in detail below with reference to the drawings. However, the present disclosure is not limited to the following embodiments. In addition, the following description and drawings have been simplified as appropriate for clarity of explanation.

[0014] First, the protective structure for an electric storage device according to this embodiment will be described. Fig. 1 is a simplified diagram showing the protective structure for an electric storage device according to this embodiment. In the following description, for clarity, a three-dimensional (XYZ) coordinate system will be used. Here, for example, the positive side of the X axis is the right side of the vehicle, the negative side of the X axis is the left side of the vehicle, the positive side of the Y axis is the front side of the vehicle, the negative side of the Y axis is the rear side of the vehicle, the positive side of the Z axis is the upper side of the vehicle, and the negative side of the Z axis is the lower side of the vehicle.

[0015] 1, the protective structure for the power storage device 1 is realized in a vehicle 2. The power storage device 1 extends, for example, in the X-axis direction. The power storage device 1 includes a battery module 3, a battery case 4, and a non-waterproof device 5.

[0016] The battery module 3 may include a lithium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, or an all-solid-state battery. As shown in Fig. 1, the battery case 4 houses the battery module 3. The non-waterproof device 5 is, for example, a connection portion with a connector cable, and protrudes from the battery case 4 toward the + side of the Y axis.

[0017] The vehicle 2 is an electric vehicle or a hybrid vehicle, and as shown in Fig. 1, the power storage device 1 is disposed between a seat 6 and a floor panel 7. The seat 6 is fixed to the floor panel 7 and may be, for example, a rear seat.

[0018] The floor panel 7 forms, for example, a part of the body of the vehicle 2. As shown in Fig. 1, a cross member 8 is fixed to the end of the floor panel 7 on the negative side of the Z axis in order to reinforce the floor panel 7 and, ultimately, the body. The cross member 8 extends in the Y axis direction and may be, for example, a rectangular pipe body.

[0019] In order to ensure cabin space for the vehicle 2, recesses 7a are formed in the floor panel 7 at positions that avoid the cross member 8. In the example shown in FIG. 1, the recesses 7a are located on the +Y-axis side and the -Y-axis side of the floor panel 7, sandwiching a portion 7b where the cross member 8 is fixed.

[0020] Therefore, portion 7b of floor panel 7 to which cross member 8 is fixed protrudes toward the +Z axis side relative to the bottom of recess 7a on the -Z axis side of negative Y axis side and the bottom of recess 7a on the -Z axis side of positive Y axis side, as shown in Fig. 1. Power storage device 1 is disposed on the +Z axis side of recess 7a on the -Y axis side.

[0021] 1, a seat trim 9 hangs down from the end of the seat 6 on the +Y-axis side toward the -Z-axis side. The seat trim 9 is, for example, a plate body that is convex toward the +Y-axis side when viewed from the Y-axis direction, and separates the space on the -Z-axis side of the seat 6 from the cabin space. The seat trim 9 may, for example, be a rectangle that is long in the X-axis direction when viewed from the Y-axis direction.

[0022] 1, the end portion of the seat trim 9 on the negative Z-axis side is disposed on the positive Y-axis side of the portion 7b to which the cross member 8 is fixed in the floor panel 7, with a gap between it and the bottom portion on the negative Z-axis side of the recess 7a on the positive Y-axis side. However, the shape of the seat trim 9 is not limited to the above-mentioned shape as long as it is a plate body that can separate the space on the negative Z-axis side of the seat 6 from the cabin space.

[0023] In such a configuration, for example, when condensation occurs when the power storage device 1 is cooled, it is discharged from the power storage device 1, or water enters the interior of the vehicle 2 from the outside, and water may accumulate in the recess 7a on the negative side of the Y axis of the floor panel 7.

[0024] At this time, when the vehicle 2 brakes, water moves to the Y-axis + side and is splashed up by the Y-axis + side wall portion 7c of the Y-axis - side recess 7a in the floor panel 7 (in other words, the Y-axis - side wall portion of the Y-axis - side of the portion 7b in the floor panel 7 to which the cross member 8 is fixed), or the water flowing out from the Y-axis - side recess 7a is splashed up by the seat trim 9.

[0025] There is a risk that the splashed water will come into contact with the non-waterproof equipment 5 of the electricity storage device 1, and the water will adversely affect the non-waterproof equipment 5. Therefore, in the protective structure for the electricity storage device 1 of this embodiment, as shown in Fig. 1 , a sheet member 10 is arranged to cover the area between the end of the battery case 4 of the electricity storage device 1 on the +Y-axis side and the end of the recess 7a on the -Y-axis side in the floor panel 7, as viewed from the Y-axis direction.

[0026] The sheet member 10 may be made of, for example, resin, and may have a generally rectangular shape that is long in the X-axis direction when viewed in the Y-axis direction, as shown in Fig. 1. The end portion of the sheet member 10 on the Z-axis + side is, for example, the end portion of the battery case 4 of the energy storage device 1 on the Y-axis + side and is fixed to the end portion on the Z-axis - side.

[0027] 1, the end portion of the sheet member 10 on the positive side of the Z axis is fixed to a position on the negative side of the Z axis relative to the non-waterproof device 5 in the battery case 4 of the electricity storage device 1. The end portion of the sheet member 10 on the negative side of the Z axis is disposed on the positive side of the Y axis relative to a portion 7b of the floor panel 7 to which the cross member 8 is fixed.

[0028] Therefore, the sheet member 10 hangs down from a position on the negative side of the Z axis relative to the non-waterproof equipment 5 in the battery case 4 of the energy storage device 1, and covers the negative side wall portion 7d of the recess 7a on the positive side of the Y axis in the floor panel 7 (in other words, the positive side wall portion of the Y axis in the positive side of the Y axis of the portion 7b of the floor panel 7 to which the cross member 8 is fixed).

[0029] In other words, the sheet member 10 hangs down on the +Y-axis side from the portion 7b of the floor panel 7 to which the cross member 8 is fixed. In this case, it is preferable that the sheet member 10 has a length that allows the end portion of the sheet member 10 on the -Z-axis side to come into contact with the seat trim 9 when the sheet member 10 rotates around the X-axis around the end portion of the sheet member 10 on the +Z-axis side.

[0030] Next, a procedure for protecting non-waterproof equipment 5 of power storage device 1 from water using the protective structure for power storage device 1 of the present embodiment will be described. Fig. 2 is a simplified diagram showing a state in which water has accumulated in a recess in a floor panel in the protective structure for a power storage device of the present embodiment.

[0031] Fig. 3 is a simplified diagram showing how water flows out of a recess in a floor panel in the protective structure for an electricity storage device of the present embodiment. Fig. 4 is a simplified diagram showing how non-waterproof devices of the electricity storage device are protected from water by a sheet member in the protective structure for an electricity storage device of the present embodiment.

[0032] When water 11 accumulates in the recess 7a on the Y-axis negative side of the floor panel 7 as shown in Figure 2 and the vehicle 2 brakes, the water 11 moves to the Y-axis positive side and flows out of the recess 7a on the Y-axis negative side of the floor panel 7 as shown in Figure 3.

[0033] At this time, the water 11 flowing out from the recess 7a on the negative side of the Y-axis of the floor panel 7 flows along the surface 7e on the positive side of the Z-axis of the portion 7b of the floor panel 7 to which the cross member 8 is fixed, as shown in Figure 4, and pushes the sheet member 10 toward the positive side of the Y-axis, causing the sheet member 10 to rotate around the X-axis, centered on the end of the sheet member 10 on the positive side of the Z-axis.

[0034] This reduces the energy of the water 11 moving toward the +Y-axis side. The water 11, which has lost its path to move toward the +Z-axis side due to the sheet member 10, passes over the portion 7b of the floor panel 7 to which the cross member 8 is fixed toward the +Y-axis side, and is guided toward the -Z-axis side along the sheet member 10.

[0035] As a result, even if water 11 moves toward the Y-axis + side when braking the vehicle 2 and is splashed up by the Y-axis + side wall portion 7c of the Y-axis - side recess 7a in the floor panel 7, the sheet member 10 can prevent the water 11 from coming into contact with the non-waterproof equipment 5 of the storage device 1.

[0036] Furthermore, the sheet member 10 reduces the energy of the water 11 moving toward the + side of the Y axis, so even if the water 11 comes into contact with the seat trim 9, it is less likely to splash up to the non-waterproof equipment 5 of the storage device 1, and contact of the water 11 with the non-waterproof equipment 5 of the storage device 1 can be suppressed.

[0037] Therefore, the protective structure for the power storage device 1 of the present embodiment makes it difficult for the non-waterproof equipment 5 of the power storage device 1 to be adversely affected by water 11. Note that the water 11 that flows out from the recess 7a on the negative side of the Y axis of the floor panel 7 is preferably discharged from a discharge portion formed in the floor panel 7.

[0038] At this time, it is preferable that the end portion of the sheet member 10 on the negative side of the Z axis contacts the seat trim 9 when the end portion is pushed toward the positive side of the Y axis by the water 11, as shown in Fig. 4. This makes it possible to prevent the water 11 from splashing up on the seat trim 9, and further to prevent the water 11 from contacting the non-waterproof equipment 5 of the electricity storage device 1.

[0039] Here, it is preferable that the seat member 10 has enough elasticity to return to its original state (i.e., a non-rotated state) under its own weight after contacting the seat trim 9. Furthermore, it is preferable that the seat member 10, in a non-rotated state, does not contact the bottom of the recess 7a on the Y-axis + side of the floor panel 7 on the Z-axis − side.

[0040] In this way, in the protective structure of the energy storage device 1 of this embodiment, when viewed from the Y-axis direction, the sheet member 10 hangs down from a position on the negative Z-axis side relative to the non-waterproof device 5 in the battery case 4 so as to cover the area between the end of the battery case 4 of the energy storage device 1 on the positive Y-axis side and the end of the recess 7a on the negative Y-axis side in the floor panel 7 on the positive Y-axis side.

[0041] As a result, even if water 11 moves toward the Y-axis + side when the vehicle 2 brakes and is splashed up by the Y-axis + side wall portion 7c of the Y-axis - side recess 7a in the floor panel 7, the sheet member 10 can prevent the water 11 from coming into contact with the non-waterproof equipment 5 of the storage device 1.

[0042] Furthermore, water 11 moving toward the + side of the Y axis comes into contact with sheet member 10, and sheet member 10 reduces the energy of water 11 moving toward the + side of the Y axis, so even if water 11 comes into contact with seat trim 9, it is difficult for water 11 to splash up to non-waterproof equipment 5 of electricity storage device 1, and it is possible to prevent water 11 from coming into contact with non-waterproof equipment 5 of electricity storage device 1. Therefore, the protective structure for electricity storage device 1 of this embodiment makes it difficult for water 11 to adversely affect non-waterproof equipment 5 of electricity storage device 1.

[0043] Furthermore, when the sheet member 10 rotates around the X axis around the end of the sheet member 10 on the +Z axis side, if the end of the sheet member 10 on the -Z axis side comes into contact with the seat trim 9, the sheet member 10 can prevent water 11 from splashing up on the seat trim 9, thereby further preventing water 11 from coming into contact with the non-waterproof equipment 5 of the storage device 1.

[0044] Although the non-waterproof device 5 in the above embodiment protrudes from the battery case 4 on the +Y-axis side, it may also protrude from the battery case 4 on the -Y-axis side. In this case, the sheet member 10 and the like may be disposed on the -Y-axis side with respect to the electricity storage device 1.

[0045] Furthermore, in the above embodiment, a configuration has been exemplified in which the non-waterproof equipment 5 of the electricity storage device 1 is protected from water that accumulates in the recess 7a of the floor panel 7, but the portion in which water accumulates may be any recess formed in the vehicle 2. Furthermore, in the present embodiment, the seat trim 9 is configured to splash up water, but the member that splashes up water may be any wall portion that is arranged on the side of the recess where the non-waterproof equipment 5 protrudes from the battery case 4 of the electricity storage device 1.

[0046] The present disclosure is not limited to the above-described embodiments, and can be modified as appropriate within the scope of the present disclosure. [Explanation of symbols]

[0047] 1. Energy storage device 2 vehicles 3 Battery Module 4 Battery case 5 Non-waterproof equipment 6 seats 7 Floor Panel 7a Recess 7b Floor panel where the cross member is fixed 7c Side wall portion on the +Y axis side of the recess on the -Y axis side of the floor panel 7d The side wall portion of the recess on the Y-axis + side of the floor panel 7e The Z-axis + side surface of the floor panel where the cross member is fixed 8 Cross members 9 Seat trim 10 Sheet member 11 water

Claims

1. A protective structure for an electricity storage device that is mounted on a vehicle and in which a non-waterproof device protrudes forward or backward from a battery case, the power storage device is disposed above a recess provided in the vehicle and at a distance from the recess, a sheet member is arranged to cover a portion between an end of the battery case on a side where the non-waterproof device protrudes from the battery case and an end of the recess on a side where the non-waterproof device protrudes from the battery case, as viewed from the front-rear direction of the vehicle; The protective structure for an electricity storage device, wherein the sheet member is an end of the battery case on a side where the non-waterproof device protrudes from the battery case, and hangs down from a position below the non-waterproof device.

2. The protective structure for an electricity storage device according to claim 1 , wherein a lower end of the sheet member hangs down from the recess on a side where the non-waterproof device protrudes from the battery case.

3. The recess is formed in a floor panel of the vehicle, a cross member of the vehicle is disposed on a side of the recess where the non-waterproof device protrudes from the battery case; 3. The protective structure for an electricity storage device according to claim 2, wherein a lower end of the sheet member hangs down from the cross member on a side where the non-waterproof device protrudes from the battery case.

4. a wall portion is disposed on the sheet member on a side where the non-waterproof device protrudes from the battery case; The protective structure for an electric storage device according to claim 3 , wherein a lower end of the sheet member is disposed between the wall portion and the cross member in the front-rear direction of the vehicle.

5. the power storage device is disposed between a seat and a floor panel of the vehicle in the vertical direction of the vehicle, the wall portion is a seat trim of the vehicle, The protective structure for an electric storage device according to claim 4, wherein when the seat member rotates around an upper end of the seat member, a lower end of the seat member comes into contact with the seat trim.

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