Battery unit and electric vehicle

Abstract

The utility model aims to provide a storage battery unit and an electric vehicle, which can be used for efficiently carrying out fire extinguishing operation on a storage battery fire disaster. In order to solve the above problem, the battery unit comprises: a battery; and a storage part for storing the storage battery. Furthermore, at least a part of the upper part of the storage battery is opened by means of heat generated by the fire. The battery unit may further include a fastening portion to fasten the storage portion to the vehicle, fastening of the fastening portion is released by heat generated by a fire, and at least a portion of the storage portion falls off to expose the battery to the outside of the vehicle. The accommodating part may also have: a bottom surface part forming a bottom surface; a side surface portion connected to the bottom surface portion and forming a side surface; and an upper surface part which is connected with the side surface part and forms an upper surface. At least a portion of the upper surface portion is opened by heat generated by the fire.

Description

Technical Field

[0001] This utility model relates to a battery unit and an electric vehicle. Background Technology

[0002] In recent years, efforts have been made to achieve a low-carbon or decarbonized society. In order to reduce CO2 emissions from vehicles and improve energy efficiency, research and development related to electric vehicles are underway.

[0003] Previously, an electric vehicle was known, comprising a drive engine for driving the wheels and a battery for supplying power to the drive engine (see Patent Document 1). Generally, the batteries in electric vehicles are mostly located under the chassis at the bottom of the vehicle body. Therefore, in the event of a battery fire, it is difficult to directly release the extinguishing agent onto the battery. In the electric vehicle described in Patent Document 1, when a battery fire occurs, the extinguishing agent spray section of the fire extinguishing device is connected to an extinguishing agent injection section in the cooling circulation circuit of the electric vehicle. Through the extinguishing agent injection section, the extinguishing agent is supplied from the fire extinguishing device to the cooling circulation circuit to extinguish the battery fire.

[0004] Prior art patent document 1: Japanese Patent Application Publication No. 2013-136266 Utility Model Content

[0005] [The problem that the utility model aims to solve]

[0006] However, in electric vehicle-related technologies, there is a problem with efficiently extinguishing fires in the event of a fire within the electric vehicle. In the electric vehicle described in Patent Document 1, the extinguishing agent spray nozzle of the fire extinguishing device needs to be connected to the extinguishing agent injection nozzle on the cooling circulation path of the electric vehicle for fire suppression. When the fire in the electric vehicle is intense, it may be difficult to approach the vehicle and connect the extinguishing agent spray nozzle of the fire extinguishing device to the extinguishing material injection nozzle on the cooling circulation path of the electric vehicle. Therefore, there is a problem with inefficient fire suppression.

[0007] The purpose of this invention is to solve the above-mentioned problems by providing a battery unit and electric vehicle capable of efficiently extinguishing battery fires. Furthermore, it contributes to improving energy efficiency.

[0008] [Technical means to solve the problem]

[0009] (1) The battery unit of this utility model includes: a battery; and a storage part for storing the battery; and at least a portion above the battery is opened by the heat generated by the fire.

[0010] (2) According to the battery unit described in (1) above, the battery unit may further include a fastening part to fasten the storage part to the vehicle, and the fastening of the fastening part is released by the heat generated by the fire, and at least a portion of the storage part falls off, so that the battery is exposed to the outside of the vehicle.

[0011] (3) The battery unit according to (1) or (2) above may also have the following features: a bottom part forming a bottom surface; a side part connecting to the bottom part and forming a side surface; and an upper surface part connecting to the side part and forming an upper surface; and at least a portion of the upper surface part is opened by the heat generated by the fire.

[0012] (4) According to the battery unit described in (2) above, the aforementioned storage part may also have: a bottom part forming a bottom surface; a side part connecting to the aforementioned bottom part and forming a side surface; and an upper surface part connecting to the aforementioned side part and forming an upper surface; and the aforementioned fastening part is released by the heat generated by the fire, so that the aforementioned bottom part falls off.

[0013] (5) According to the battery unit described in (2) above, the aforementioned storage part may also have: a bottom part forming a bottom surface; a side part connecting to the aforementioned bottom part and forming a side surface; and an upper surface part connecting to the aforementioned side part and forming an upper surface; and the aforementioned fastening part is released by the heat generated by the fire, so that the aforementioned bottom part and the aforementioned side part fall off together.

[0014] (6) According to the battery unit described in (2) above, the aforementioned fastening part may also have a fixing member, and the aforementioned battery unit further includes: a removal part for removing the aforementioned fixing member from the aforementioned storage part; and a moving part for moving the aforementioned storage part.

[0015] (7) According to the battery unit described in (2) above, the aforementioned fastening part may also have a fixing member, and the aforementioned fastening member is pressed into the aforementioned storage part to fasten the aforementioned storage part to the aforementioned vehicle by the aforementioned fastening member. The aforementioned battery unit further includes: a gas generating part that generates gas by the heat generated by the fire; and a gas flow path that connects the aforementioned gas generating part to the aforementioned fixing member; and the aforementioned fixing member is removed from the aforementioned storage part by the pressure of the gas generated from the aforementioned gas generating part due to the aforementioned fire.

[0016] (8) According to the battery unit described in (2) above, the fastening part may have a fixing member, and a pressing hole is formed on the storage part for the fixing member to be pressed in. By pressing the fixing member into the pressing hole, the storage part is fastened to the vehicle by the fixing member. A liquid storage space is formed in the pressing hole, which can store liquid when the fixing member is pressed in. The liquid stored in the liquid storage space is turned into vapor and expanded by the heat of the fire, so that the fixing member can be removed from the storage part.

[0017] (9) According to the battery unit described in (2) above, the aforementioned fastening part may also have a fixing member, the aforementioned fixing member having a molten part, the molten part being formed of a material that melts due to the heat generated by the fire, the aforementioned molten part being melted by the heat generated by the fire, thereby releasing the fastening of the aforementioned fastening part.

[0018] (10) According to the battery cell described in (9) above, the aforementioned fixing member may further have a heat-conducting part to conduct heat to the aforementioned molten part, and at least a portion of the aforementioned heat-conducting part is located inside the aforementioned molten part.

[0019] (11) According to the battery unit described in (9) above, an insertion hole for inserting the aforementioned fixing member may also be formed on the aforementioned storage part. By inserting the aforementioned fixing member into the aforementioned insertion hole, the aforementioned storage part is fastened to the aforementioned vehicle by the aforementioned fixing member. In the aforementioned insertion hole, a space is formed in the state where the aforementioned fixing member has been inserted.

[0020] (12) According to the battery unit described in (2) above, the aforementioned fastening part may also have: a rod part; and a retaining part, which is supported to be rotatable and retains the aforementioned storage part; and the aforementioned rod part has: an expansion part that expands due to heat generated by a fire; and a rotating part that is supported to be rotatable at both ends of the aforementioned expansion part; and the aforementioned expansion part expands due to heat generated by a fire, causing the aforementioned rotating part to rotate, and the aforementioned retaining part rotates due to the rotation of the aforementioned rotating part, thereby releasing the retention of the aforementioned storage part by the rotation of the aforementioned retaining part.

[0021] (13) According to the battery cell described in (2) above, the aforementioned housing portion may also have: a bottom portion forming a bottom surface; a side portion connected to the aforementioned bottom portion and forming a side surface; and an upper surface portion connected to the aforementioned side portion and forming an upper surface; and at least one of the aforementioned upper surface portion and the aforementioned side portion has a housing molten portion, the housing molten portion being formed of a material that melts due to heat generated by a fire.

[0022] (14) According to the battery unit described in (13) above, the aforementioned storage portion may further have an extension portion, the extension portion extending from the aforementioned side portion, and the base end of the aforementioned extension portion being connected to the aforementioned storage molten portion.

[0023] (15) The electric vehicle of this utility model includes the battery unit described in any one of (1) to (14) above.

[0024] (Effects of the utility model)

[0025] According to (1) above, the heat from the fire causes at least a portion of the battery to open. Therefore, a path for the extinguishing agent to reach the battery can be ensured. As a result, firefighting operations can be carried out efficiently.

[0026] According to (2) above, by releasing the fastener, the bottom part falls off. With at least a portion of the storage part falling off, the battery is exposed to the outside of the vehicle. Therefore, a path for directly applying the fire extinguishing agent to the battery can be ensured. Thus, the fire extinguishing agent can be directly released onto the battery. As a result, fire extinguishing operations can be carried out efficiently.

[0027] According to (3) above, the heat generated by the fire causes at least a portion of the upper surface to open. As a result, when the battery catches fire, gas can be released from the opening.

[0028] According to (4) above, by loosening the fastener, the bottom part falls off. With the bottom part falling off, the battery is exposed to the outside of the vehicle. Therefore, a path can be ensured for the fire extinguishing agent to be applied directly to the battery. Thus, the fire extinguishing agent can be released directly onto the battery. As a result, fire extinguishing operations can be carried out efficiently.

[0029] According to (5) above, the heat generated by the fire releases the fastener, causing the bottom and side portions to fall off together. Thus, a space is created by the fallen bottom and side portions. As a result, extinguishing agent released into this space can be stored. Consequently, fire extinguishing operations can be carried out more efficiently.

[0030] According to (6) above, the battery unit further includes a removal section and a moving section. The removal section removes the fixing members from the storage section. The moving section moves the storage section. Therefore, the storage section can be moved in the falling direction. Therefore, the storage section can fall to the ground. As a result, the battery can be exposed to the outside of the vehicle, thus ensuring a path for the fire extinguishing agent to be applied directly to the battery. Therefore, the fire extinguishing agent can be released directly onto the battery. As a result, fire extinguishing operations can be carried out efficiently.

[0031] According to (7) above, the fixing member is removed from the storage unit by the pressure of the gas generated from the gas generating unit due to the fire. Therefore, an engine is not required for removing the fixing member from the storage unit. Furthermore, the gas generating unit can be the same as the air inflator commonly used in electric vehicles. Therefore, the fixing member can be removed from the storage unit with a simple structure. That is, the fastener can be released with a simple structure.

[0032] According to (8) above, in the battery unit, the liquid contained in the liquid storage space turns into vapor and expands due to the heat of ignition, thereby removing the fixing member from the storage part. There is no need to install a new member for releasing the fastener. Therefore, the fastener can be released with a simple structure.

[0033] According to (9) above, the molten part melts by the heat of ignition, thereby releasing the fastening of the fastener. Therefore, there is no need for an engine for removing the fixing member from the storage part. Therefore, the fastening of the fastener can be released with a simple structure.

[0034] According to (10) above, at least a portion of the heat-conducting part is located inside the molten part. Therefore, the heat from the fire can be efficiently conducted to the molten part. As a result, the heat from the fire can melt the molten part relatively quickly. Therefore, the time it takes for the battery to fall off can be controlled.

[0035] According to (11) above, a space is formed in the insertion hole when the fixing member is inserted. The space functions as an insulating air layer. Therefore, when the battery catches fire, due to the existence of the space, the heat generated by the fire on the fixing member is not directly transferred to the fixing member, but bypasses the space and is transferred to the fixing member. As a result, the molten part can be melted relatively slowly by the heat of the fire. Therefore, the time when the battery falls can be controlled.

[0036] According to (12) above, the expansion part expands due to the heat of the fire, causing the rotating part to rotate. The rotation of the rotating part causes the retaining part to rotate. The rotation of the retaining part releases the retaining part from the storage part. That is, the fastening of the fastener is released. Therefore, there is no need for an engine to release the fastener between the vehicle and the storage part. Therefore, the fastener can be released with a simple structure.

[0037] According to (13) above, the heat generated by the fire causes at least a portion of the upper surface to open. When the battery catches fire, gas can be released from the opening.

[0038] As described in (14) above, since the receiving section has a protruding portion, the extinguishing agent released into the protruding portion can be guided into the interior of the receiving section. Therefore, the extinguishing agent can be stored efficiently in the receiving section. As a result, fire extinguishing operations can be carried out efficiently.

[0039] According to (15) above, by releasing the fastener, the bottom part falls off. By at least a portion of the storage part falling off, the battery is exposed to the outside of the vehicle. Therefore, a path for applying the fire extinguishing agent directly to the battery can be ensured. Therefore, the fire extinguishing agent can be released directly onto the battery. As a result, fire extinguishing operations can be carried out efficiently. Attached Figure Description

[0040] Figure 1 This is a schematic side view showing the general structure of an electric vehicle according to one embodiment of the present invention.

[0041] Figure 2 This is a schematic side view showing the general structure of the electric vehicle according to this embodiment.

[0042] Figure 3 This is a schematic side view showing the general structure of the electric vehicle according to this embodiment.

[0043] Figure 4A This is a schematic side view of a battery unit according to one embodiment of the present invention.

[0044] Figure 4B This is a schematic side view of a battery unit according to one embodiment of the present invention.

[0045] Figure 4C This is a schematic side view of a battery unit according to one embodiment of the present invention.

[0046] Figure 4D This is a schematic side view of a battery unit according to one embodiment of the present invention.

[0047] Figure 5A This is a schematic side view of a battery unit according to one embodiment of the present invention.

[0048] Figure 5B This is a schematic side view of a battery unit according to one embodiment of the present invention.

[0049] Figure 5C This is a schematic side view of a battery unit according to one embodiment of the present invention.

[0050] Figure 6A This is a schematic cross-sectional view of the area near the fixing component of the battery unit according to one embodiment of the present invention.

[0051] Figure 6BThis is a schematic cross-sectional view of the area near the fixing component of the battery unit according to one embodiment of the present invention.

[0052] Figure 7A This is a schematic side view of a battery unit according to one embodiment of the present invention.

[0053] Figure 7B This is a schematic side view of a battery unit according to one embodiment of the present invention.

[0054] Figure 8A This is a schematic cross-sectional view of the area near the fixing component of the battery unit according to one embodiment of the present invention.

[0055] Figure 8B This is a schematic cross-sectional view of the fixing component of the battery unit according to one embodiment of the present invention.

[0056] Figure 8C This is a schematic cross-sectional view of the fixing component of the battery unit according to one embodiment of the present invention.

[0057] Figure 9 This is a schematic cross-sectional view of the area near the fixing component of the battery unit according to one embodiment of the present invention.

[0058] Figure 10A This is a schematic top view of a battery unit according to one embodiment of the present invention.

[0059] Figure 10B This is a schematic side view of a battery unit according to one embodiment of the present invention.

[0060] Figure 10C This is a schematic side view of a battery unit according to one embodiment of the present invention.

[0061] Figure 10D This is a schematic side view of a battery unit according to one embodiment of the present invention.

[0062] Figure 11A This is a schematic cross-sectional view of a battery unit according to one embodiment of the present invention.

[0063] Figure 11B This is a schematic cross-sectional view of a battery unit according to one embodiment of the present invention.

[0064] Figure 11C This is a schematic cross-sectional view of a battery unit according to one embodiment of the present invention.

[0065] Figure Labels

[0066] 1. Electric vehicles

[0067] 100 battery units

[0068] 110 storage battery

[0069] 120 Storage Department

[0070] 121 Bottom surface

[0071] 122 Side profile

[0072] 123 upper surface

[0073] 124 Storage for molten section

[0074] 125 Protruding part

[0075] 129 Press-in Hole

[0076] 130 Fastener

[0077] 132 Fixed components

[0078] 134 pole section

[0079] 136 Maintenance Department

[0080] 150 Mobile Department

[0081] 160 Gas Generation Section

[0082] 170 Gas Flow Path

[0083] 200 vehicles

[0084] 1223 Insertion Hole

[0085] 1223s Space

[0086] 1292 Liquid Storage Space

[0087] 1322 Melting section

[0088] 1324 Thermal Conductive Part

[0089] 1342 Expansion section

[0090] 1344 Rotating part Detailed Implementation

[0091] The various embodiments of this utility model will now be described with reference to the accompanying drawings. Figure 1 This is a schematic side view showing the general structure of an electric vehicle 1 according to one embodiment of the present invention. Figure 1 In the diagram, ground G represents the ground where electric vehicle 1 is parked. For example... Figure 1As shown, an electric vehicle 1 according to one embodiment of the present invention includes a battery unit 100 and a vehicle 200. The electric vehicle 1 further includes a drive unit (not shown) and a charger (not shown). The electric vehicle 1 is, for example, a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), or a battery electric vehicle (BEV).

[0092] The battery unit 100 is, for example, a battery pack (also known as an Intelligent Power Unit (IPU)). The battery unit 100 functions as the power control device for the electric vehicle 1. The battery unit 100 includes a battery 110, a storage section 120, and a fastening section 130.

[0093] Battery 110 is a high-voltage battery that is charged and discharged by a charger (not shown) to supply power to the drive unit. Battery 110 is composed of multiple battery cells connected in series. The battery cells are, for example, lithium-ion rechargeable batteries. Battery 110 is a high-capacity battery. The drive unit uses the power supplied by the battery cells to propel the electric vehicle 1.

[0094] The storage section 120 houses the battery 110. The storage section 120 has, for example, a rectangular parallelepiped shape. The storage section 120 is, for example, hollow. The storage section 120 is, for example, made of metal. The storage section 120 has a bottom portion 121, a side portion 122, and a top surface portion 123. The bottom portion 121 forms a bottom surface. The side portion 122 is connected to the bottom portion 121. The side portion 122 forms a side surface. The top surface portion 123 is connected to the side portion 122. The top surface portion 123 forms a top surface. The storage section 120 covers the top of the battery 110. In this embodiment, the top surface portion 123 covers the top of the battery 110. In this embodiment, the storage section 120 covers the top, sides, and bottom of the battery 110. The storage section 120 is disposed in the lower part of the vehicle 200. Specifically, the storage section 120 is disposed under the chassis of the vehicle 200.

[0095] The fastening part 130 secures the storage part 120 to the vehicle 200. Here, the fastening part 130 secures the storage part 120 to the lower part of the vehicle 200. As a result, the battery 110 is positioned in the lower part of the vehicle 200. Specifically, the battery 110 is positioned under the chassis of the vehicle 200. The construction of the fastening part 130 will be described below with reference to FIG4 and the following figures.

[0096] refer to Figure 2 This further illustrates an embodiment of the electric vehicle 1 of the present invention. Figure 2 This is a schematic side view showing the general structure of the electric vehicle 1 according to this embodiment.

[0097] like Figure 2 As shown, the battery unit 100 releases the fastener 130 by the heat generated from the fire. Details regarding the release of the fastener 130 will be described below with reference to FIG. 4 and the following figures. The heat from the fire causes at least a portion of the upper part of the battery 110 to open. Figure 2 In the example shown, the heat from the fire causes the entire top of the battery 110 to open. Therefore, a path for the fire extinguishing agent to reach the battery 110 can be ensured. As a result, fire extinguishing operations can be carried out efficiently. Furthermore, by releasing the fastener 130, at least a portion of the housing 120 falls out. Figure 2 In the example shown, the heat generated by the fire causes the fastener 130 to loosen, and the bottom part 121 falls off. With at least a portion of the housing 120 falling off, the battery 110 is exposed to the outside of the vehicle 200. Therefore, a path for directly applying the fire extinguishing agent to the battery 110 can be ensured. Thus, the fire extinguishing agent W can be directly released onto the battery 110. As a result, fire extinguishing operations can be performed efficiently. The fire extinguishing agent W is, for example, a liquid. The liquid is, for example, water. That is, according to the battery unit 100 of this embodiment, in the event of a battery fire, water can be sprayed directly onto the battery 110. Therefore, fire extinguishing operations for battery fires can be performed efficiently. Furthermore, the fire extinguishing agent W is not limited to a liquid and can also be a solid. When the fire extinguishing agent W is a solid, it is preferably in powder form.

[0098] refer to Figure 3 An electric vehicle 1 according to one embodiment of the present invention will be described. Figure 3 This is a schematic side view showing the general structure of the electric vehicle 1 according to this embodiment. Aside from the fact that the fastener 130 is released due to the heat generated by the fire, causing the bottom part 121 and the side part 122 to fall off together, Figure 3 The electric vehicle 1 shown has the same features as the reference. Figure 2 The electric vehicle 1 described herein has the same structure, therefore, repeated descriptions are omitted.

[0099] like Figure 3 As shown, the heat generated by the fire causes the fastener 130 to loosen, and the bottom part 121 and the side part 122 fall off together. Therefore, a space S is formed by the fallen bottom part 121 and side part 122. As a result, the extinguishing agent W released into the space S can be stored. Consequently, fire extinguishing operations can be carried out more efficiently.

[0100] refer to Figures 4A to 4D An example of releasing the fastener 130 will be described. Figures 4A to 4D This is a side view showing a schematic structure of a battery unit 100 according to one embodiment of the present invention. (Omitted and referenced) Figures 1-3 The description of the repeated parts of the battery unit 100 is as follows.

[0101] like Figure 4A As shown, vehicle 200 has a body frame 210. The body frame 210 is disposed on the lower part of vehicle 200. More specifically, the body frame 210 is disposed under the chassis of vehicle 200.

[0102] The storage section 120 has a lower housing 126, an upper housing 127, and a storage section fixing member 128. The lower housing 126 forms part of the bottom portion 121 and the side portion 122. The upper housing 127 forms part of the upper surface portion 123 and the side portion 122. The storage section fixing member 128 fixes the upper housing 127 to the lower housing 126. The storage section fixing member 128 is, for example, a bolt. The storage section fixing member 128 is, for example, made of metal.

[0103] The fastening part 130 has a fixing member 132. The fixing member 132 is, for example, a bolt. The fixing member 132 is, for example, made of metal. The fixing member 132 fixes the housing part 120 to the vehicle 200. Here, the fixing member 132 fixes the lower housing 126 of the housing part 120 to the body frame 210 of the vehicle 200.

[0104] like Figure 4B As shown, in addition to the battery 110 and the storage section 120, the battery unit 100 also includes a removal section 140 and a storage section removal section 145.

[0105] The removal unit 140 removes the fixing member 132 from the storage unit 120. The removal unit 140 has a drive unit 142 and a fitting part 144. The drive unit 142 is, for example, an engine. The drive unit 142 rotates the fitting part 144. The fitting part 144 can fit into the fixing member 132. When the battery 110 catches fire, with the fitting part 144 fitted into the fixing member 132, the drive unit 142 rotates the fitting part 144 so that the removal unit 140 can remove the fixing member 132 from the storage unit 120. As a result, the storage unit 120 can be separated from the vehicle frame 210.

[0106] The storage unit removal unit 145 removes the storage unit fixing member 128 from the storage unit 120. The storage unit removal unit 145 has a drive unit 146 and a fitting part 147. The drive unit 146 is, for example, an engine. The drive unit 146 rotates the fitting part 147. The fitting part 147 can fit into the storage unit fixing member 128. When the battery 110 catches fire, with the fitting part 147 fitted into the storage unit fixing member 128, the drive unit 146 rotates the fitting part 147, allowing the storage unit removal unit 145 to remove the storage unit fixing member 128 from the storage unit 120. As a result, the lower housing 126 and the upper housing 127 can be separated.

[0107] like Figure 4C As shown, the battery unit 100 further includes a moving part 150. The moving part 150 is, for example, an actuator. The moving part 150 moves the storage part 120. Specifically, the moving part 150 moves the storage part 120 in a dropping direction. The moving part 150 causes the storage part 120 to fall, for example, by pulling or pushing the storage part 120 downwards.

[0108] like Figure 4D As shown, the storage unit 120 falls onto the ground G. Therefore, the battery 110 is exposed to the outside of the vehicle 200, ensuring a path for the fire extinguishing agent to be applied directly to the battery 110. Thus, the fire extinguishing agent W can be released directly onto the battery 110. As a result, fire extinguishing operations can be carried out efficiently.

[0109] refer to Figures 5A-5C Other examples of releasing the fastener 130 will be described. Figures 5A-5C This is a side view showing a schematic structure of a battery unit 100 according to one embodiment of the present invention. (Omitted and referenced) Figures 1 to 4D The description of the repeated parts of the battery unit 100 is as follows.

[0110] like Figure 5A As shown, in addition to the battery 110 and the storage section 120, the battery unit 100 also includes a gas generation section 160 and a gas flow path 170.

[0111] The gas generating unit 160 generates gas using the heat generated by the fire. The gas generating unit 160 is, for example, a gas cylinder.

[0112] Gas flow path 170 connects gas generating unit 160 to fixing member 132. Gas flow path 170 further connects gas generating unit 160 to receiving unit fixing member 128. Gas generated from gas generating unit 160 flows through gas flow path 170 and is discharged to fixing member 132 and receiving unit fixing member 128.

[0113] By pressing the retaining member 132 into the storage portion 120, the storage portion 120 is secured to the vehicle 200 by the retaining member 132. Here, the retaining member 132 secures the side portion 122 of the storage portion 120 to the body frame 210 of the vehicle 200. The retaining member 132 is, for example, a press-in pin.

[0114] The upper housing 127 is fixed to the lower housing 126 by pressing the storage part fixing member 128 into the storage part 120. The storage part fixing member 128 is, for example, a press-in pin.

[0115] like Figure 5B As shown, the pressure of the gas generated from the gas generating section 160 due to a fire causes the battery unit 100 to remove the fixing member 132 and the storage section fixing member 128 from the storage section 120. Specifically, if the battery unit 100 catches fire, the gas generating section 160 generates gas using the heat of the fire. The gas generated from the gas generating section 160 flows through the gas flow path 170 and is discharged towards the fixing member 132 and the storage section fixing member 128. Therefore, pressure is applied to the fixing member 132 and the storage section fixing member 128 to spring them open. As a result, the fastening of the fixing member 132 of the fastening section 130 between the storage section 120 and the vehicle 200 is released. Consequently, the storage section 120 separates from the vehicle 200. Furthermore, the fastening of the storage section fixing member 128 between the upper housing 127 and the lower housing 126 is released. Consequently, the upper housing 127 separates from the lower housing 126. By releasing the fastening between the storage section 120 and the vehicle 200, and by releasing the fastening between the storage section fixing member 128 and the upper housing 127 and the lower housing 126, the lower housing 126 is allowed to fall off. In other words, by releasing the fastening between the upper surface portion 123 and the side portion 122, the bottom portion 121 and the side portion 122 are allowed to fall off together.

[0116] like Figure 5CAs shown, the battery 110 is exposed to the outside of the vehicle 200 when the lower housing 126 falls off. Therefore, a path for directly applying the fire extinguishing agent to the battery 110 can be ensured. Thus, the fire extinguishing agent W can be directly released onto the battery 110. As a result, fire extinguishing operations can be performed efficiently. Furthermore, according to this embodiment, an engine is not required for removing the fixing member 132 from the storage section 120. Furthermore, the gas generating section 160 can use the same air cylinder typically used for airbags in electric vehicles. Therefore, the fixing member 132 can be removed from the storage section 120 with a simple structure. That is, the fastening of the fastener 130 can be released with a simple structure. Moreover, compared to the engine configuration when an engine is used to remove the fixing member 132 from the storage section 120, the configuration of the gas flow path 170 in this embodiment is less restricted. Therefore, the layout has a greater degree of freedom compared to when an engine is used to remove the fixing member 132 from the storage section 120.

[0117] refer to Figure 6A and Figure 6B Other examples of releasing the fastener 130 will be described. Figure 6A and Figure 6B This is a schematic cross-sectional view of the vicinity of the fixing member 132 of the battery unit 100 according to one embodiment of the present invention. (Omitted and referenced) Figures 1 to 5C The description of the repeated parts of the battery unit 100 is as follows.

[0118] like Figure 6A As shown, a press-in hole 129 is formed in the storage section 120. A fixing member 132 is pressed into the press-in hole 129. The fixing member 132 is, for example, a pressure pin. By pressing the fixing member 132 into the press-in hole 129, the storage section 120 is fastened to the vehicle 200 by the fixing member 132. A liquid storage space 1292 is formed in the press-in hole 129 with the fixing member 132 pressed in. The liquid storage space 1292 can store liquid WA. Liquid WA is, for example, water.

[0119] like Figure 6BAs shown, in the battery unit 100, the liquid WA contained in the liquid storage space 1292 expands due to the heat of ignition, turning into steam WV, thereby removing the fixing member 132 from the storage section 120. In this embodiment, the water contained in the liquid storage space 1292 of the battery unit 100 expands due to the heat of ignition, turning into water vapor, thus expanding the liquid storage space 1292. Therefore, the pressure load on the fixing member 132 decreases. Furthermore, the liquid WA boils due to the heat of ignition, and the steam can be used to repel the fixing member 132. In this embodiment, the water boils due to the heat of ignition, and the steam can be used to repel the fixing member 132. Therefore, the fastening of the fixing member 132 of the fastening section 130 between the storage section 120 and the vehicle 200 is released. Therefore, the storage section 120 is separated from the vehicle 200. As a result, the storage section 120 can be dropped, thereby exposing the battery 110 to the outside of the vehicle 200. Therefore, a path for direct application of the fire extinguishing agent to the battery 110 can be ensured. Therefore, the fire extinguishing agent W can be directly released onto the battery 110. As a result, fire extinguishing operations can be performed efficiently. According to this embodiment, there is no need to install new components for releasing the fastener 130. Therefore, the fastener 130 can be released with a simple structure.

[0120] refer to Figure 7A and Figure 7B Other examples of releasing the fastener 130 will be described. Figure 7A and Figure 7B This is a schematic side view of a battery unit 100 according to one embodiment of the present invention. (Omitted and referenced) Figures 1 to 6B The description of the repeated parts of the battery unit 100 is as follows.

[0121] like Figure 7A As shown, the fixing member 132 is, for example, a bolt. The fixing member 132 has a molten portion 1322. The molten portion 1322 is formed of a material that melts due to the heat of ignition. The molten portion 1322 is, for example, formed of resin. In this embodiment, the fixing member 132 is entirely formed of the molten portion 1322. In other words, in this embodiment, the fixing member 132 is entirely formed of resin.

[0122] The storage part fixing member 128 is, for example, a bolt. The storage part fixing member 128 is, for example, made of resin.

[0123] The molten portion 1322 melts due to the heat of the fire, thereby releasing the fastening of the fastening portion 130. As a result, the housing portion 120 separates from the vehicle 200. Furthermore, the housing portion fixing member 128 melts due to the heat of the fire, thereby releasing the fixation between the housing portion fixing member 128 and the upper housing 127 and the lower housing 126. As a result, the upper housing 127 and the lower housing 126 separate. By releasing the fastening between the housing portion 120 and the vehicle 200, and by releasing the fixation between the housing portion fixing member 128 and the upper housing 127 and the lower housing 126, the lower housing 126 falls off. In other words, by releasing the fixation between the upper surface portion 123 and the side portion 122, the bottom portion 121 and the side portion 122 fall off together.

[0124] like Figure 7B As shown, the lower housing 126 falls off, exposing the battery 110 to the outside of the vehicle 200. Therefore, a path for directly applying the fire extinguishing agent to the battery 110 can be ensured. Thus, the fire extinguishing agent W can be directly released onto the battery 110. As a result, fire extinguishing operations can be performed efficiently. Furthermore, according to this embodiment, an engine is not required for removing the fixing member 132 from the storage portion 120. Therefore, the fastening of the fastener 130 can be released with a simple structure.

[0125] refer to Figures 8A to 8C Other examples of releasing the fastener 130 will be described. Figure 8A This is a schematic cross-sectional view of the area near the fixing member 132 of the battery unit 100 according to one embodiment of the present invention. Figure 8B and Figure 8C This is a schematic cross-sectional view of the fixing member 132 of the battery unit 100 according to one embodiment of this utility model. Figures 8A to 8C In the middle, the molten part 1322 is represented by a shaded line sloping upwards to the left. Figures 8A to 8C In the center, the heat-conducting part 1324 is indicated by a shaded line sloping upwards to the right. (Omitted and referenced) Figures 1 to 7B The description of the repeated parts of the battery unit 100 is as follows.

[0126] like Figure 8A As shown, a through hole 220 is formed on the vehicle 200. The through hole 220 penetrates the body frame 210 of the vehicle 200. A through hole 1222 is formed in the storage section 120. The through hole 1222 penetrates the side portion 122 of the storage section 120.

[0127] The fixing member 132 has a head 1326 and a shaft portion 1327. The head 1326 is the portion of the fixing member 132 located on the side of the vehicle frame 210. The shaft portion 1327 is connected to the head 1326. The shaft portion 1327 is inserted into through holes 220 and 1222. In addition to the molten portion 1322, the fixing member 132 also has a heat-conducting portion 1324. The heat-conducting portion 1324 conducts heat to the molten portion 1322. The heat-conducting portion 1324 is formed of a material with high thermal conductivity. The heat-conducting portion 1324 is, for example, formed of metal. The metal is, for example, copper. Figure 8A In the example shown, the head 1326 is mainly formed by a heat-conducting portion 1324. The shaft portion 1327 is mainly formed by a molten portion 1322. At least a portion of the heat-conducting portion 1324 is located inside the molten portion 1322. One end of the heat-conducting portion 1324 protrudes into the internal space of the receiving portion 120. That is, one end of the heat-conducting portion 1324 extends towards the battery 110 (in... Figure 8A (Not shown in the figure) The heat-conducting part 1324 protrudes to the side. Therefore, the heat from the fire can be conducted from the inside of the molten part 1322 to the molten part 1322. Therefore, the heat from the fire can be conducted to the molten part 1322 efficiently. As a result, the heat from the fire can be used to melt the molten part 1322 relatively quickly. Therefore, the time when the battery 110 is dropped can be controlled. The strength of the heat-conducting part 1324 is set to a level that cannot support the weight of the battery unit 100 when the molten part 1322 melts. Therefore, since the molten part 1322 melts, the heat-conducting part 1324 cannot support the weight of the housing part 120, causing the heat-conducting part 1324 to break at position P1. As a result, the fastening member 132 of the fastening part 130 is released from the fastening between the housing part 120 and the vehicle 200. Therefore, the housing part 120 is separated from the vehicle 200. As a result, the storage section 120 can be dropped, thereby exposing the battery 110 to the outside of the vehicle 200. According to this embodiment, there is no need to provide new components for releasing the fastener 130. Therefore, the fastener 130 can be released with a simple structure.

[0128] exist Figure 8A In the shown fixing member 132, the head 1326 is formed by the molten portion 1322, as shown. Figure 8B As shown, the head 1326 can also be formed from the heat-conducting part 1324. Figure 8B In the example shown, because the molten part 1322 melts, the heat-conducting part 1324 is unable to support the weight of the housing part 120, causing the heat-conducting part 1324 to break at position P1. As a result, the fastening member 132 of the fastening part 130 is released from the fastening between the housing part 120 and the vehicle 200.

[0129] Figure 8A and Figure 8B The fixing member 132 shown is formed by the molten portion 1322 throughout the entire shaft portion 1327, but as Figure 8C As shown, the molten portion 1322 can also be formed only near position P1. Figure 8C In the example shown, because the molten part 1322 melts, the heat-conducting part 1324 is unable to support the weight of the housing part 120, causing the heat-conducting part 1324 to break at position P1. As a result, the fastening member 132 of the fastening part 130 is released from the fastening between the housing part 120 and the vehicle 200.

[0130] refer to Figure 9 Other examples of releasing the fastener 130 will be described. Figure 9 This is a schematic cross-sectional view of the vicinity of the fixing member 132 of the battery unit 100 according to one embodiment of the present invention. Figure 9 In the diagram, the molten portion 1322 is indicated by a shading line sloping upwards to the left. (Omitted and referenced) Figures 1 to 8C The description of the repeated parts of the battery unit 100 is as follows.

[0131] like Figure 9 As shown, an insertion hole 1223 and a cooling flow path 1224 are formed in the housing portion 120. In this embodiment, the insertion hole 1223 and the cooling flow path 1224 are formed on the side portion 122. The insertion hole 1223 does not penetrate the side portion 122. A fixing member 132 is inserted into the insertion hole 1223. Cooling water flows in the cooling flow path 1224. The cooling water cools the battery 110. By inserting the fixing member 132 into the insertion hole 1223, the housing portion 120 is secured to the vehicle 200 by the fixing member 132. A space 1223s is formed in the insertion hole 1223 when the fixing member 132 is inserted. The space 1223s functions as a heat-insulating air layer. Therefore, when the battery 110 catches fire, due to the existence of space 1223s, the heat generated by the fire in the fixing member 132 is not directly and linearly transferred to the fixing member 132, but bypasses space 1223s and is transferred to the fixing member 132. As a result, the molten part 1322 can be melted relatively slowly by the heat of the fire. Therefore, the time when the battery 110 is dropped can be controlled.

[0132] refer to Figures 10A to 10D Other examples of releasing the fastener 130 will be described. Figure 10A This is a schematic top view of a battery unit 100 according to one embodiment of the present invention. Figures 10B to 10D This is a schematic side view of a battery unit 100 according to one embodiment of the present invention. Figure 10A To avoid complicating the accompanying drawings, the battery 110 and the storage unit 120 have been omitted. (Omission and reference) Figures 1-9 The description of the repeated parts of the battery unit 100 is as follows.

[0133] like Figure 10A and Figure 10B As shown, the fastening part 130 has a rod part 134 and a retaining part 136.

[0134] The rod portion 134 has an expansion portion 1342 and a rotating portion 1344. The rod portion 134 is formed of metal. The expansion portion 1342 expands due to the heat generated by the fire. The expansion portion 1342 is rod-shaped. The rotating portion 1344 is supported at both ends of the expansion portion 1342 and is rotatable.

[0135] The retaining part 136 is supported and is rotatable. The retaining part 136 holds the storage part 120. The upper part of the retaining part 136 is in contact with the lower part of the rotating part 1344.

[0136] like Figure 10C As shown, the expansion portion 1342 expands due to the heat of the fire, causing the rotating portion 1344 to rotate. The rotation of the rotating portion 1344 causes the retaining portion 136 to rotate. The rotation of the retaining portion 136 releases its hold on the receiving portion 120. In other words, the fastening of the fastening portion 130 is released.

[0137] like Figure 10D As shown, by releasing the retaining part 136 from holding the storage part 120, the storage part falls off. As a result, the battery 110 can be exposed to the outside of the vehicle 200. In this embodiment, there is no need for an engine to release the fastener between the vehicle 200 and the storage part 120. Therefore, the fastener 130 can be released with a simple structure.

[0138] Reference Figures 1 to 10D In the described battery unit 100, at least a portion of the storage portion 120 falls off because the heat generated by a fire releases the fastening of the fastening part 130. However, this invention is not limited to this. For example, the storage portion 120 may fall off without the heat generated by a fire. (See reference) Figures 11A to 11C Here is an example of storage unit 120. Figures 11A to 11C This is a schematic cross-sectional view of a battery unit 100 according to one embodiment of the present invention. (Omitted and referenced) Figures 1 to 10D The description of the repeated parts of the battery unit 100 is as follows.

[0139] like Figure 11AAs shown, at least one of the upper surface portion 123 and the side surface portion 122 has a receiving molten portion 124. In this embodiment, both the upper surface portion 123 and the side surface portion 122 have receiving molten portions 124. The receiving molten portion 124 is formed of a material that melts due to heat generated by ignition. The receiving molten portion 124 is formed, for example, of resin. The receiving portion 120 further has a protrusion 125. The protrusion 125 extends from the side surface portion 122. The base end of the protrusion 125 is connected to the receiving molten portion 124.

[0140] like Figure 11B As shown, if the battery 110 catches fire, the molten portion 124 is melted by the heat generated by the fire. That is, the heat generated by the fire causes at least a portion of the upper surface portion 123 to open. Therefore, at least a portion of the upper part of the battery 110 is opened. In this embodiment, the upper part of the battery 110 is opened. As a result, the battery 110 can be exposed from the housing portion 120.

[0141] like Figure 11C As shown, since the battery 110 can be exposed to the outside of the vehicle 200, a path for the fire extinguishing agent W to be directly applied to the battery 110 can be ensured. Therefore, the fire extinguishing agent W can be directly released onto the battery 110. Furthermore, since the receiving portion 120 has a protrusion 125, the fire extinguishing agent W released into the protrusion 125 can be guided into the interior of the receiving portion 120. Therefore, the fire extinguishing agent W can be stored in the receiving portion 120 efficiently. As a result, fire extinguishing operations can be performed efficiently. In addition, at least one of the upper surface portion and the side portion has a receiving molten portion 124, which is a material that melts due to the heat of the fire. Therefore, when the battery 110 catches fire, the receiving molten portion 124 melts due to the heat of the fire. Therefore, at least a portion of the upper surface portion 123 and the side portion 122 can be opened. As a result, when the battery 110 catches fire, gas can be released from the opening. By releasing the gas inside the receiving section 120 through the opening in the upper surface section 123, the extinguishing agent W supplied from the side of the protrusion 125 can be rapidly guided into the receiving section 120. Furthermore, the extinguishing agent W can be placed into the receiving section 120 through the opening. Additionally, compared with the reference... Figures 1 to 10D Similarly, the battery unit 100 described above can also use the heat generated by a fire to loosen the fastening of the fastening part 130, causing the storage part 120 to fall off.

[0142] The embodiments of this utility model have been described above, but this utility model is not limited to the above embodiments and various changes and modifications can be made.

Claims

1. A battery cell characterized by, The battery unit includes: a battery; a housing portion that covers the battery and houses the battery; and at least a portion of the housing portion is opened by heat generated by a fire. The battery unit further includes a fastening portion that fastens the housing portion to a vehicle, by heat generated by a fire, the fastening of the fastening portion is released, and at least a portion of the housing portion falls off to expose the battery to the outside of the vehicle.

2. The battery cell of claim 1, wherein, The housing portion has: a bottom surface portion that forms a bottom surface; 3. The battery cell of claim 1 or claim 2, wherein, a side surface portion that is connected to the bottom surface portion and forms a side surface; and a top surface portion that is connected to the side surface portion and forms a top surface, and at least a portion of the top surface portion is opened by heat generated by a fire. The housing portion has: a bottom surface portion that forms a bottom surface; 4. The battery cell of claim 2, wherein, a side surface portion that is connected to the bottom surface portion and forms a side surface; and a top surface portion that is connected to the side surface portion and forms a top surface, and by heat generated by a fire, the fastening of the fastening portion is released to cause the bottom surface portion to fall off. The housing portion has: a bottom surface portion that forms a bottom surface; 5. The battery cell of claim 2, wherein, a side surface portion that is connected to the bottom surface portion and forms a side surface; and a top surface portion that is connected to the side surface portion and forms a top surface, and by heat generated by a fire, the fastening of the fastening portion is released to cause the bottom surface portion to fall off together with the side surface portion. The fastening portion has a fixing member, The battery unit further includes:

6. The battery cell of claim 2, wherein, a removal portion that removes the fixing member from the housing portion; and a moving portion that moves the housing portion. The fastening portion has a fixing member, by pressing the fixing member into the housing portion, the housing portion is fastened to the vehicle by the fixing member, 7. The battery cell of claim 2, wherein, The battery unit further includes: a gas generating portion that generates gas by heat generated by a fire; and a gas flow path that connects the gas generating portion and the fixing member, and by the pressure of the gas generated from the gas generating portion by the fire, the fixing member is removed from the housing portion. The fastening portion has a fixing member, on the housing portion, a press-in hole into which the fixing member is pressed is formed, 8. The battery cell of claim 2, wherein, by pressing the fixing member into the press-in hole, the housing portion is fastened to the vehicle by the fixing member, in the press-in hole, a liquid receiving space that can receive a liquid in a state in which the fixing member has been pressed in is formed, by heat generated by the fire, the liquid received in the liquid receiving space becomes vapor and expands to remove the fixing member from the housing portion. The fastening portion has a fixing member, The fixing member has a melting portion formed of a material that melts by heat generated by a fire, 9. The battery cell of claim 2, wherein, by heat generated by a fire, the melting portion is melted to release the fastening of the fastening portion. The fixing member further has a heat conducting portion that conducts heat to the melting portion, At least a portion of the heat conducting portion is located inside the melting portion.

10. The battery cell of claim 9, wherein, on the housing portion, an insertion hole into which the fixing member is inserted is formed, ​ 11. The battery cell of claim 9, wherein, ​ The receiving portion is fastened to the vehicle by the fixing member inserted into the insertion hole, In the insertion hole, a space is formed in a state where the fixing member is inserted.

12. The battery cell of claim 2, wherein, The fastening portion has: a rod portion; and a holding portion rotatably supported and holding the receiving portion; and The rod portion has: an expansion portion expanded by heat generated by fire; and a rotation portion rotatably supported at both ends of the expansion portion; and The expansion portion is expanded by heat generated by fire, so that the rotation portion is rotated, and the holding portion is rotated by the rotation of the rotation portion, The holding portion is rotated to release the holding of the receiving portion by the holding portion.

13. The battery cell of claim 2, wherein, The receiving portion has: a bottom surface portion forming a bottom surface; a side surface portion connected to the bottom surface portion and forming a side surface; and a top surface portion connected to the side surface portion and forming a top surface; and At least one of the top surface portion and the side surface portion has a receiving melting portion formed of a material melted by heat generated by fire.

14. The battery cell of claim 13, wherein, The receiving portion further has a protruding portion protruding from the side surface portion, The base end of the protruding portion is connected to the receiving melting portion.

15. An electric vehicle characterized by comprising: The battery cell unit according to any one of claims 1 to 14.

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