Electricity storage device housing

Abstract

The objective of this invention is to improve the rust resistance of the upper housing. The battery storage device housing comprises: an upper housing, wherein the surface and back of a housing body made of carbon fiber reinforced resin are covered with a coating made of glass fiber reinforced resin; a lower housing, which is fastened to the upper housing and forms a receiving portion for accommodating a battery between the lower housing and the upper housing; a metal fastener, which is inserted through a first fastening hole in the upper housing and a second fastening hole in the lower housing, and fastens the upper housing and the lower housing; and an insulating component (blade), which is disposed inside the first fastening hole and insulates the upper housing and the fastener.

Description

Technical Field

[0001] This invention relates to a housing for an energy storage device. Background Technology

[0002] Patent Document 1 describes a laminated composite material comprising a first fiber-reinforced resin composite material layer, a conductive layer formed on one side of the first fiber-reinforced resin composite material layer, an insulating layer formed on the other side of the first fiber-reinforced resin composite material layer, and a second fiber-reinforced resin composite material layer formed on the side opposite to the side of the insulating layer.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2012-6528 Summary of the Invention

[0004] In the housing of an energy storage device including a battery unit, metal fasteners such as bolts or rivets are sometimes used to join an upper housing made of fiber-reinforced resin and a lower housing made of, for example, aluminum. In this case, by installing, for example, a resin bushing between the fastener and the upper housing, direct contact between the fastener and the upper housing is suppressed, thereby preventing the upper housing from rusting.

[0005] However, for example, if a highly conductive liquid such as mud or water adheres between the fastener and the upper housing, the fastener and the upper housing will be energized, potentially causing what is known as galvanic corrosion in the upper housing.

[0006] The purpose of this invention is to improve the rust prevention effect of the upper housing.

[0007] The first embodiment of the energy storage device housing comprises: an upper housing, wherein the surface and back of a housing body made of carbon fiber reinforced resin are covered with a covering made of glass fiber reinforced resin; a lower housing, which is fastened to the upper housing and forms a receiving portion for accommodating a battery between the lower housing and the upper housing; a metal fastener, which is inserted into a first fastening hole in the upper housing and a second fastening hole in the lower housing, and fastens the upper housing and the lower housing; and an insulating component disposed inside the first fastening hole and insulating the upper housing and the fastener.

[0008] In the first type of energy storage device housing, the upper housing and the lower housing are fastened together by a fastener, and the battery is housed in the accommodating portion between these housings.

[0009] In the upper housing, the surface and back of the housing body, which is made of carbon fiber reinforced resin, are covered with a coating made of glass fiber reinforced resin. Therefore, even if highly conductive liquids such as mud or water adhere between the fastener and the upper housing, short circuits between the fastener and the carbon fiber reinforced resin of the upper housing can be suppressed, as can corrosion of the upper housing surface. In other words, the rust-proof effect of the upper housing is improved.

[0010] In the second embodiment of the energy storage device housing, in the first embodiment, the carbon fiber reinforced resin is exposed in the first fastening hole, and the insulating component covers the exposed portion of the carbon fiber reinforced resin in the first fastening hole.

[0011] In the second type of energy storage device housing, the insulating component covers the exposed portion of the carbon fiber reinforced resin in the first fastening hole, thereby improving the rust prevention effect of the upper housing.

[0012] In the third embodiment of the energy storage device housing, in the first or second embodiment, the covering portion exists on the back side of the upper housing at a position opposite to the battery.

[0013] In a third-party energy storage device housing, short circuits between the battery and the upper housing can be suppressed on the back side of the upper housing.

[0014] In the fourth type of energy storage device housing, in any of the first to third types, the covering portion covers the surface of the upper housing.

[0015] In the fourth type of energy storage device housing, the covering part covers the surface of the upper housing, thus preventing direct contact between the surface of the upper housing and the upper housing.

[0016] The fifth type of energy storage device housing, in any of the first to fourth types, includes: an adhesive that bonds the upper housing and the lower housing, wherein the fastener is located further outward than the adhesive from the receiving portion.

[0017] In the fifth type of energy storage device housing, the upper and lower housings can be bonded together with an adhesive. The upper and lower housings are fastened to the outside of the housing by a fastener, thus preventing the adhesive from peeling off.

[0018] Invention Effects

[0019] According to the present invention, the rust prevention effect of the upper housing can be improved. Attached Figure Description

[0020] Figure 1 This is a schematic cross-sectional view of the housing of the energy storage device according to the present invention.

[0021] Figure 2 This is a partial cross-sectional view showing the housing of the energy storage device according to the first embodiment.

[0022] Figure 3 This is a partial cross-sectional view showing the housing of the energy storage device according to the second embodiment. Detailed Implementation

[0023] Hereinafter, the housing of the energy storage device according to the first embodiment of the present invention will be described with reference to the accompanying drawings. Furthermore, the description will primarily focus on the scope necessary for explaining the technology of the present invention, and omissions in the description are assumed to be based on prior art. Identical or equivalent components in the drawings will be labeled with the same or similar symbols, and repeated descriptions will be omitted. Moreover, when a drawing includes multiple identical or equivalent components, sometimes only a portion of them will be labeled for ease of observation.

[0024] Figure 1 This is a schematic cross-sectional view of the energy storage device housing 12, illustrating the technology of the present invention. Figure 1 As shown, the energy storage device housing 12 has an upper housing 14 and a lower housing 16. A joint 18 is provided around the upper housing 14 and the lower housing 16. In the joint 18, the upper housing 14 and the lower housing 16 are bonded together by an adhesive 22.

[0025] With the upper housing 14 and the lower housing 16 bonded together by adhesive 22, a receiving portion 24 is formed between the upper housing 14 and the lower housing 16. A battery 26 is housed in the receiving portion 24. For example, a urethane-based adhesive can be used as the adhesive 22.

[0026] The upper housing 14 has a housing body 30 and a covering portion 32. The housing body 30 is made of carbon fiber reinforced resin and is formed into a box shape with an open lower surface, such that it can form a receiving portion 24 between itself and the lower housing 16. The covering portion 32 is made of glass fiber reinforced resin and covers the front and back surfaces of the housing body 30. The front surface of the housing body 30 is also the outer surface of the energy storage device housing 12, and the back surface of the housing body 30 is also the inner surface of the energy storage device housing 12. Hereinafter, the covering portion 32 on the surface of the housing body 30 will sometimes be referred to as covering portion 32A, and the covering portion 32 on the back surface will sometimes be referred to as covering portion 32B. Covering portion 32A covers the entire surface of the housing body 30, and covering portion 32B covers the entire back surface of the housing body 30. The housing body 30 can also be described as a structure in which the housing body 30 is sandwiched between covering portion 32A and covering portion 32B.

[0027] As an example, the lower housing 16 is made of a metal such as aluminum. A fastening hole 34 is formed in the joint 18 between the upper housing 14 and the lower housing 16. The fastening hole 34 is located further outward than the adhesive 22 from the battery housing 12. Hereinafter, the fastening hole 34 will sometimes be distinguished as the first fastening hole 34A of the upper housing 14 and the second fastening hole 34B of the lower housing 16. The carbon fiber reinforced resin of the housing body 30 is exposed on the inner surface of the first fastening hole 34A of the upper housing 14.

[0028] A fastener 36 is inserted into the fastening hole 34. The fastener 36 can be, for example, a combination of bolt 38 and nut 40 described later. Figure 2 The first embodiment shown) and rivet 42 ( Figure 3 (as shown in the second embodiment). The solid 36 is made of metal.

[0029] A bushing 44 is disposed in the fastening hole 34. At least its outer surface is insulating. For example, the bushing 44 may be entirely made of resin, or it may be a metal surface covered with an insulating material. The bushing 44 has a cylindrical portion 46 and flange portions 48A and 48B formed on the upper and lower portions of the cylindrical portion 46. The portion of the bushing 44 disposed particularly inside the first fastening hole 34A is an example of an insulating component according to the technology of the present invention.

[0030] The cylindrical portion 46 is cylindrical in shape, surrounding the fastener 36. The cylindrical portion 46 covers the inner surface of the fastening hole 34 of the upper housing 14, i.e., the exposed portion of the carbon fiber reinforced resin. The flange portion 48A is annular with a larger diameter than the cylindrical portion 46, and contacts the head 36H of the fastener 36 and the surface of the upper housing 14. The flange portion 48B is annular with a larger diameter than the cylindrical portion 46, and contacts the surface of the lower housing 16 and the back surface of the upper housing 14. In the present invention, the bushing 44 is divided into an upper bushing portion 44U and a lower bushing portion 44L.

[0031] exist Figure 2 The image shows a first embodiment of the energy storage device housing 52 according to the present invention. Figure 2 In the example shown, the fastening portion of the upper housing 14 and the lower housing 16 in the energy storage device housing 52 is configured similarly to... Figure 1 The examples shown are essentially the same. The first embodiment is an example of using a combination of bolt 38 and nut 40 as the fastener 36.

[0032] exist Figure 3 The image shows a second embodiment of the energy storage device housing 62 according to the technology of the present invention. Figure 3 In the example shown, the fastening portion of the upper housing 14 and the lower housing 16 in the energy storage device housing 62 is configured similarly to... Figure 1 The examples shown are essentially the same. The second embodiment is an example of using rivet 42 as the fastener 36.

[0033] In the first and second embodiments, the covering portion 32A covers the entire surface of the housing body 30. The covering portion 32B covers the entire back side of the housing body 30, and the covering portion 32B is opposite to the battery 26 housed in the receiving portion 24.

[0034] Next, the function of the technology of the present invention will be explained.

[0035] The upper housing 14 and the lower housing 16 are bonded together by adhesive 22, allowing the battery 26 to be housed within the housing 24. Furthermore, the upper housing 14 and the lower housing 16 are secured to the outside of the battery housing 12, beyond the adhesive 22, by fasteners 36. This prevents the adhesive 22 from peeling off.

[0036] The shell body 30 of the upper shell 14 is made of carbon fiber reinforced resin. Therefore, for example, compared with the case where the shell body is made of metal, it is possible to maintain the required strength while achieving lightweight.

[0037] The upper housing 14 has a covering portion 32 covering its surface and back side of the housing body 30. The housing body 30 is made of carbon fiber reinforced resin, and therefore has electrical conductivity. In contrast, the covering portion 32 is made of glass fiber reinforced resin, and therefore has electrical insulation. Therefore, direct contact between the fastener 36 and the housing body 30 can be suppressed, and corrosion (galvanic corrosion) of the housing body 30 can also be suppressed. That is, the rust prevention effect of the upper housing 14 can be improved.

[0038] In particular, such as Figure 2 and Figure 3 As shown, for example, suppose that a highly conductive liquid such as mud or water is attached between the solid 36 and the upper housing 14. Even in this case, since the covering portion 32 is covered on the surface and back of the housing body 30, short circuits between the solid 36 and the housing body can be suppressed, and corrosion of the housing body 30 can also be suppressed.

[0039] A bushing 44 is disposed in the fastening hole 34 of the upper housing 14 and the lower housing 16. That is, the insulating bushing 44 covers the carbon fiber reinforced resin of the housing body 30 on the inner peripheral surface of the fastening hole 34. The fastener 36 does not make electrical contact with the inner peripheral surface of the fastening hole 34 of the upper housing 14, thus inhibiting corrosion of the housing body 30 on the inner peripheral surface of the fastening hole 34.

[0040] On the back of the upper housing 14, a covering portion 32B is also formed opposite to the battery 26 housed in the receiving portion 24. Therefore, even if the battery 26 moves within the receiving portion 24, a short circuit between the battery 26 and the housing body 30 can be suppressed.

[0041] On the surface of the upper housing 14, the covering portion 32A covers the entire housing body 30. Therefore, for example, it is possible to prevent personnel performing operations on the energy storage device from coming into contact with the housing body 30.

[0042] In the upper shell 14, since the covering part 32 covers the surface and back of the shell body 30, the carbon fiber reinforced resin of the shell body 30 can be suppressed from scattering even if the upper shell 14 is damaged.

[0043] The following are notes relating to this invention.

[0044] (Note 1)

[0045] A housing for an energy storage device, characterized in that it comprises: The upper shell, wherein the surface and back of the shell body made of carbon fiber reinforced resin are covered with a covering made of glass fiber reinforced resin; The lower housing is fastened to the upper housing and forms a receiving portion between the lower housing and the upper housing for accommodating the battery; A metal fastener is inserted into a first fastening hole in the upper housing and a second fastening hole in the lower housing, and fastens the upper housing and the lower housing; and An insulating component is disposed inside the first fastening hole and insulates the upper housing and the fastening solid.

[0046] (Note 2)

[0047] The energy storage device housing according to Appendix 1 is characterized in that, The carbon fiber reinforced resin is exposed in the first fastening hole. The insulating component covers the exposed portion of the carbon fiber reinforced resin in the first fastening hole.

[0048] (Note 3)

[0049] The energy storage device housing according to Appendix 1 is characterized in that, The covering portion is located on the back of the upper housing, opposite to the battery.

[0050] (Note 4)

[0051] The energy storage device housing according to Appendix 1 is characterized in that, The covering portion covers the surface of the upper housing.

[0052] (Note 5)

[0053] The energy storage device housing according to Appendix 1 is characterized by comprising: An adhesive that bonds the upper housing and the lower housing. The fastener is located further outward from the receptacle than the adhesive.

[0054] Symbol Explanation

[0055] 12-Energy storage device housing, 14-Upper housing, 16-Lower housing, 18-Joint, 22-Adhesive, 24-Receiving part, 26-Battery, 30-Housing body, 32-Covering part, 34-Fasting hole, 36-Fasting body, 44-Bushing, 52-Energy storage device housing, 62-Energy storage device housing.

Claims

1. A housing for an energy storage device, characterized in that, have: The upper shell, wherein the surface and back of the shell body made of carbon fiber reinforced resin are covered with a covering made of glass fiber reinforced resin; The lower housing is fastened to the upper housing and forms a receiving portion between the lower housing and the upper housing for accommodating the battery; A metal fastener is inserted into a first fastening hole in the upper housing and a second fastening hole in the lower housing, and fastens the upper housing and the lower housing; and An insulating component is disposed inside the first fastening hole and insulates the upper housing and the fastening solid.

2. The housing of the energy storage device according to claim 1, characterized in that, The carbon fiber reinforced resin is exposed in the first fastening hole. The insulating component covers the exposed portion of the carbon fiber reinforced resin in the first fastening hole.

3. The housing of the energy storage device according to claim 1, characterized in that, The covering portion is located on the back of the upper housing, opposite to the battery.

4. The housing of the energy storage device according to claim 1, characterized in that, The covering portion covers the surface of the upper housing.

5. The housing of the energy storage device according to claim 1, characterized in that, have: An adhesive that bonds the upper housing and the lower housing. The fastener is located further outward from the receptacle than the adhesive.

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