Standby battery assembly

Abstract

The present disclosure relates to a backup battery assembly, and more particularly, to a backup battery assembly that locks or unlocks a door lock by supplying a current to the door lock when a main power source of the door lock is turned off. A backup battery assembly of the present disclosure includes: a backup battery supplying current to a door lock when a main power source of the door lock is turned off; a backup battery case accommodating a backup battery; and a protection block installed inside the backup battery case to protect the backup battery, the protection block may include: a first end portion coupled to one side surface inside the backup battery case; a second end portion coupled to the other side surface of the inside of the backup battery case; and a connection portion connecting the first end portion and the second end portion between the first end portion and the second end portion, a cross-sectional width of the first end portion and the second end portion in a width direction of the backup battery case may be greater than a cross-sectional width of the connection portion in the first direction, and the protection block may be a rigid block made of SUS, aluminum, or steel.

Description

TECHNICAL FIELD

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Korean Patent Application No. 10-2023-0104405, filed on August 9, 2023, in Korea, and Korean Patent Application No. 10-2024-0083044, filed on June 25, 2024, in Korea, the disclosures of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to a backup battery assembly, and more particularly, to a backup battery assembly that supplies current to a door lock to unlock the door lock when a main power source of the door lock is cut off. BACKGROUND

[0003] Unlike a primary battery that cannot be recharged, a rechargeable battery is a battery that can be charged and discharged. Low-capacity rechargeable batteries are used in small portable electronic devices such as mobile phones, notebook computers, and camcorders, and large-capacity batteries are widely used as a power source to drive a motor in a hybrid vehicle or the like.

[0004] In particular, a rechargeable battery can be used as a main power source that supplies current to an electronic door lock mounted on a door to lock or unlock the door. In this case, when the main power source is cut off, no current is supplied to the door lock, and thus there is a problem that the door can not be locked or unlocked.

[0005] To solve this problem, in the related art, a method of supplying current to a door lock using a backup battery in a case where the door lock cannot be supplied with current due to the main power source being cut off has been designed.

[0006] However, when a collision accident or the like occurs while the vehicle is traveling, which impinges the backup battery housing, there is a problem that the backup battery is damaged and cannot supply current to the door lock. In particular, when a collision accident or the like occurs while the vehicle is traveling, which impinges the backup battery housing, there is a problem that the user is trapped inside the accident vehicle due to the inability to unlock the door caused by the backup battery being damaged. SUMMARY

[0007] TECHNICAL PROBLEM The present disclosure is made to solve the above problems, and thus the present disclosure relates to providing a backup battery assembly that can supply current to a door lock by preventing a backup battery from being damaged even when the backup battery housing is damaged due to external impact.

[0008] TECHNICAL SOLUTION A backup battery assembly according to the present disclosure can include a backup battery that supplies electric current to a door lock when a main power source of the door lock is cut off, a backup battery housing that accommodates the backup battery, and a protection block installed inside the backup battery housing to protect the backup battery, wherein the protection block can include a first end portion that is combined with one side of the inside of the backup battery housing, a second end portion that is combined with the other side of the inside of the backup battery housing, and a connection portion that connects the first end portion and the second end portion between the first end portion and the second end portion, wherein a cross-sectional width of the first end portion and the second end portion in a width direction of the backup battery housing (hereinafter referred to as a first direction) can be greater than a cross-sectional width of the connection portion in the first direction, and the protection block can be a rigid block made of SUS, aluminum, or steel.

[0009] The cross-sectional width of the first end portion in the first direction can increase as it goes from the connection portion side toward one side of the inside of the backup battery housing, and the cross-sectional width of the second end portion in the first direction can increase as it goes from the connection portion side toward the other side of the inside of the backup battery housing.

[0010] The cross-sectional width of the connection portion in the first direction can be constant.

[0011] The shapes of the first end portion and the second end portion can be symmetrical with respect to the connection portion.

[0012] The backup battery can be a cylindrical battery formed by extending in a length direction of the backup battery housing.

[0013] A length of the protection block in a height direction of the backup battery housing (hereinafter referred to as a second direction) can be longer than a diameter of the backup battery.

[0014] A length of the connection portion in the second direction can be shorter than the diameter of the backup battery.

[0015] The backup battery housing can include a backup battery seating portion in which the backup battery is seated.

[0016] The backup battery seating portion can include a first seating portion installed on one side of the inside of the backup battery housing and a second seating portion installed on the other side of the inside of the backup battery housing.

[0017] Each of the first seating portion and the second seating portion can be formed with a curved seating surface corresponding to a side surface shape of the backup battery.

[0018] The backup battery housing can be made of an insulating material.

[0019] In the inside of the backup battery housing, a plurality of backup batteries can be installed along a width direction of the backup battery housing, and the protection block can be installed between the respective backup batteries.

[0020] Meanwhile, a backup battery can be installed inside the backup battery housing, and protection blocks can be installed on both sides of the backup battery in the width direction of the backup battery housing.

[0021] In addition, a plurality of protection blocks can be installed in the width direction of the backup battery housing inside the backup battery housing, and a backup battery can be installed between the protection blocks.

[0022] A hollow space can be formed inside at least one of the first end portion and the second end portion.

[0023] The width of the hollow space formed inside the first end portion can narrow as it approaches the connection portion.

[0024] The width of the hollow space formed inside the second end portion can narrow as it approaches the connection portion.

[0025] Advantageous Effects The backup battery assembly according to the present disclosure has the advantage that, since the backup battery assembly is installed inside the backup battery housing, has a wider cross-sectional width at the upper end portion and the lower end portion, and includes protection blocks made of a rigid material (e.g., SUS, aluminum, or steel), even when the backup battery housing is broken due to an external impact, it is possible to supply current to the door lock by preventing damage to the backup battery.

[0026] In particular, the backup battery assembly according to the present disclosure has the advantage that, since the height of the protection blocks installed inside the backup battery housing is formed to be longer than the diameter of the backup battery having a cylindrical shape, even when the backup battery housing is subjected to an impact, the size of the external force transmitted to the backup battery can be minimized.

[0027] In addition, the backup battery assembly according to the present disclosure has the advantage that, since the backup battery assembly includes a backup battery seating portion in which a backup battery is seated, even when the backup battery housing is subjected to an impact, it is possible to prevent the backup battery from shaking. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a perspective view illustrating a backup battery assembly according to Embodiment 1 of the present disclosure.

[0029] Figure 2 is a cross-sectional view taken along line A-A of Figure 1 .

[0030] Figure 3 is a cross-sectional view illustrating a backup battery assembly according to Embodiment 2 of the present disclosure.

[0031] Figure 4is a cross-sectional view illustrating a backup battery assembly according to Embodiment 3 of the present disclosure.

[0032] Figure 5 is a perspective view illustrating a backup battery assembly according to Embodiment 4 of the present disclosure.

[0033] Figure 6 is a cross-sectional view taken along Figure 5 line B-B of FIG. 4.

[0034] Figure 7 is a cross-sectional view illustrating a backup battery assembly according to Embodiment 5 of the present disclosure. DETAILED DESCRIPTION

[0035] Hereinafter, preferred embodiments of the present disclosure will be described in sufficient detail by referring to the attached drawings to enable those skilled in the art to which the present disclosure pertains to easily practice the present disclosure. However, the present disclosure can be implemented in many different forms and should not be construed as being limited or restricted to the embodiments set forth below.

[0036] In order to clearly describe the present disclosure, irrelevant descriptions or detailed descriptions of related known technologies that can unnecessarily obscure the gist of the present disclosure are omitted, and in attaching reference numerals to elements in each of the drawings, the same or similar reference numerals are attached to the same or similar elements throughout the specification.

[0037] In addition, it should be understood that the terms or words used in the specification and the appended claims should not be construed as being limited to the general and dictionary meanings and should be interpreted based on the meanings and concepts corresponding to the technical aspects of the present disclosure on the basis of the principle that the inventor is allowed to define appropriate terms to best explain the present disclosure.

[0038] Hereinafter, a backup battery assembly according to the present disclosure will be described with reference to the accompanying drawings.

[0039] Embodiment 1 Figure 1 is a perspective view illustrating a backup battery assembly according to Embodiment 1 of the present disclosure, and Figure 2 is a cross-sectional view taken along Figure 1 line A-A of FIG. 3.

[0040] Referring to Figure 1 and Figure 2A backup battery assembly according to the present disclosure includes a backup battery 1 supplying electric current to a door lock when a main power of the door lock is cut off, a backup battery housing 10 accommodating the backup battery 1, and a protection block 20 installed inside the backup battery housing 10 to protect the backup battery 1. Here, the protection block 20 includes a first end portion 21 combined with one side of the inside of the backup battery housing 10, a second end portion 22 combined with the other side of the inside of the backup battery housing 10, and a connection portion 23 connecting the first end portion 21 and the second end portion 22 between the first end portion 21 and the second end portion 22, wherein a cross-sectional width of the first end portion 21 and the second end portion 22 in a width direction of the backup battery housing 10 (hereinafter referred to as a first direction) can be formed to be greater than a cross-sectional width of the connection portion 23 in the first direction.

[0041] Specifically, since the cross-sectional width of the first end portion 21 and the second end portion 22 of the protection block 20 in the first direction is formed to be greater than the cross-sectional width of the connection portion 23 in the first direction, the protection block 20 is formed to be thicker in a portion directly contacting the backup battery housing 10. In this case, the protection block 20 can effectively absorb an impact applied to the backup battery housing 10, thereby effectively protecting the backup battery even when the backup battery housing 10 is impacted by a vehicle collision accident or the like.

[0042] In addition, according to the above structure of the protection block 20, in a backup battery installation space formed between two adjacent protection blocks 20, a distance between two adjacent connection portions 23 is greater than a distance between two adjacent first end portions 21 or two adjacent second end portions 22. That is, the backup battery installation space has a wide middle region, and thus the backup battery 1 can be installed in the middle region not adjacent to the backup battery housing 10. In this case, since a predetermined gap can exist between the backup battery housing 10 and the backup battery 1, even when the backup battery housing 10 is applied with an external impact, an amount of impact transmitted to the backup battery 1 can be minimized.

[0043] The protection block 20 can be a rigid block that is not easily damaged by external force. The rigid block can be made of SUS, aluminum, or steel. The rigid block made of SUS has the advantages of high corrosion resistance and high workability, and the rigid block made of aluminum has the advantages of good formability and light weight. In addition, the rigid block made of steel has the advantage of excellent durability due to its high tensile strength and yield strength.

[0044] Meanwhile, the first end portion 21 can have a cross-sectional width in the first direction that increases as it goes from the connecting portion 23 side toward one side of the inside of the secondary battery case 10, and the second end portion 22 can have a cross-sectional width in the first direction that increases as it goes from the connecting portion 23 side toward the other side of the inside of the secondary battery case 10. That is, the protection block 20 can include the first end portion 21 and the second end portion 22 whose cross-sectional widths in the first direction increase as they go toward the two end portions.

[0045] In this case, since the thicknesses of the first end portion 21 and the second end portion 22 gradually increase from the middle toward the two end portions, steps in which the thicknesses sharply change are not formed at the first end portion 21 and the second end portion 22. According to the above-described structure of the protection block 20, steps in which stress is concentrated are not formed at the first end portion 21 and the second end portion 22, and thus have the advantage that the first end portion 21 and the second end portion 22 are not easily broken even when an external force is transmitted to the protection block 20.

[0046] Even when the cross-sectional widths in the first direction of the first end portion 21 and the second end portion 22 increase as they go toward one side and the other side of the inside of the secondary battery case 10, respectively, the cross-sectional width in the first direction of the connecting portion 23 can remain constant. In this case, steps are not formed in the connecting portion 23, and thus have the advantage that the connecting portion 23 is not easily broken even when an external force is transmitted to the protection block 20.

[0047] The thickness of each of the first end portion 21 and the second end portion 22 gradually increases as it goes from the connecting portion 23 side toward the two end portions, the thickness of the connecting portion 23 remains constant, and the thickness of the portions of the first end portion 21 and the second end portion 22 adjacent to the connecting portion 23 can be formed to be substantially the same as the thickness of the connecting portion 23. In this case, steps are not formed on the entire protection block 20, and thus have the advantage that the protection block 20 is not easily broken even when an external force is transmitted to the protection block 20.

[0048] Meanwhile, the secondary battery case 10 can be composed of a first case 11 and a second case 12. The method of combining the first case 11 and the second case 12 is not particularly limited, and a protrusion and a groove are formed in each of the first case 11 and the second case 12 so that the first case 11 and the second case 12 can be assembled together. On the other hand, the first case 11 and the second case 12 can also be integrally combined by welding.

[0049] The first end portion 21 and the second end portion 22 can have a shape that is symmetrical with respect to the connecting portion 23. Specifically, the first end portion 21 and the second end portion 22 can be formed symmetrically with respect to the connecting portion 23 along a height direction of the secondary battery case 10 (hereinafter referred to as a second direction).

[0050] On the other hand, the shape and type of the backup battery 1 installed in the backup battery installation space are not particularly limited. For example, the backup battery 1 can be a cylindrical battery formed by extending in the length direction of the backup battery case (hereinafter referred to as the third direction).

[0051] The length h1 of the protection block 20 in the second direction can be longer than the diameter D of the backup battery 1. That is, there can be a certain gap between the backup battery case 10 and the backup battery 1. In this case, even when an external impact due to a vehicle collision accident or the like is applied to the backup battery case 10, the impact is not directly transmitted to the backup battery 1, thus having the advantage of minimizing damage to the backup battery 1 due to the external impact.

[0052] The length h2 of the connection portion 23 in the second direction can be shorter than the diameter D of the backup battery 1. Here, the diameter D of the backup battery 1 is formed to be shorter than the length h1 of the entire protection block 20 in the second direction and longer than the length h2 of the connection portion 23 in the second direction, so that the backup battery 1 can sufficiently fill the backup battery installation space and maintain a certain distance from the backup battery case 10. In this case, there is an advantage of preventing the external impact from being directly transmitted to the backup battery 1 and at the same time maximizing the capacity of the backup battery 1.

[0053] Meanwhile, the backup battery case 10 can include a backup battery seating portion 30 in which the backup battery 1 is seated. Specifically, the backup battery seating portion 30 can include a first seating portion 31 installed on one side of the inside of the backup battery case 10 and a second seating portion 32 installed on the other side of the inside of the backup battery case 10.

[0054] Specifically, the backup battery case 10 can include the first seating portion 31 and the second seating portion 32 installed on one side and the other side of the backup battery 1, respectively, to seat the backup battery 1. In this case, the backup battery 1 is seated at a fixed position inside the backup battery case 10, so that when an external impact is transmitted to the backup battery case 10, the backup battery 1 can be prevented from moving away from the installation position.

[0055] In addition, since each of the first seating portion 31 and the second seating portion 32 is installed between the backup battery 1 and the backup battery case 10, they can serve as a cushioning member that cushions the external impact transmitted to the backup battery case 10 before the external impact reaches the backup battery 1.

[0056] That is, the first seating portion 31 and the second seating portion 32 can be configured to determine the position of the backup battery 1 and to support the backup battery 1. Here, the protection block 20 prevents the backup battery 1 from being damaged when an external impact is applied to the backup battery housing 10, and can be configured to be irrelevant to the positioning of the backup battery 1 and the support of the backup battery 1.

[0057] Each of the first seating portion 31 and the second seating portion 32 can include a seating surface corresponding to the shape of the backup battery 1. Here, when the backup battery 1 is a cylindrical battery, the seating surface formed on each of the first seating portion 31 and the second seating portion 32 can include a curved surface corresponding to the side surface of the cylindrical battery. Meanwhile, the backup battery housing 10 can be made of an insulating material. In this case, by preventing static electricity or the like generated in the backup battery 1 from leaking from the backup battery housing 10, there is an advantage of protecting electronic components mounted around the backup battery housing 10.

[0058] The backup battery assembly can have the backup battery housing 10 made of an insulating material and the protection block 20 made of SUS, aluminum, or steel. In this case, the backup battery assembly can be manufactured by a double injection process of first injecting the protection block 20 and then injecting the backup battery housing 10.

[0059] Here, the first injection process is a process of injecting the protection block 20 using a mold, and the second injection process is a process of injecting the backup battery housing 10 on top of the first-injected protection block 20 using a new mold. The backup battery housing 10 can include the first housing 11 and the second housing 12, and thus the second injection process can be a process of separately injecting the first housing 11 and the second housing 12 on top of the first-injected protection block 20.

[0060] In this way, when the double injection method is utilized in the manufacturing of the backup battery assembly, the protection block 20 is joined with the backup battery housing 10, and this joining does not generate a gap between the protection block 20 and the backup battery housing 10, thereby having an advantage of enhancing the durability of the product. In addition, a mold is used in the double injection method, which is suitable for mass production of the product, thereby having an advantageous effect of improving the productivity of the backup battery assembly.

[0061] In addition, the backup battery housing 10 can have a form in which an insulating material is coated on a main body made of SUS, aluminum, or steel. In this case, the backup battery housing 10 can ensure high rigidity and prevent static electricity or the like generated in the backup battery 1 from leaking from the backup battery housing 10.

[0062] Here, the insulating material can be coated on the main body by different methods. For example, a powder coating process can be used to coat the main body with the insulating material.

[0063] Meanwhile, as shown in Figure 1 and Figure 2 , a plurality of backup batteries 1 are installed inside the backup battery housing 10 along the width direction (first direction) of the backup battery housing, and the protection blocks 20 can be installed between the respective backup batteries 1. In this case, the backup batteries 1 and the protection blocks 20 are alternately installed inside the backup battery housing 10 along the first direction, thus having the advantage of effectively protecting the plurality of backup batteries 1 accommodated inside the backup battery housing 10.

[0064] In addition, according to the above structure of the backup battery assembly, the protection blocks 20 are installed between the respective backup batteries 1, and thus the backup batteries 1 should be spaced apart so that the protection blocks 20 having sufficient rigidity can be installed between the backup batteries 1. Here, the interval between the backup batteries 1 is not particularly limited. For example, the interval between the backup batteries 1 can exceed 2 mm so that the protection blocks 20 having a thickness of 2 mm or more in the first direction can be installed between the backup batteries 1.

[0065] Embodiment 2 Figure 3 is a cross-sectional view illustrating a backup battery assembly according to Embodiment 2 of the present disclosure.

[0066] Embodiment 2 of the present disclosure is different from Embodiment 1 in that only one backup battery 1 is included inside the backup battery housing 10. The same content as Embodiment 1 will be omitted as much as possible, and Embodiment 2 will be described focusing on the difference. That is, it is obvious that the content not described in Embodiment 2 can consider the content of Embodiment 1 if necessary.

[0067] Referring to Figure 3 , one backup battery 1 can be installed inside the backup battery housing 10, and the protection blocks 20 can be installed on both sides of the backup battery 1 along the width direction (first direction) of the backup battery housing 10. One backup battery 1 is installed in the backup battery housing 10, and thus the backup battery assembly can be minimized. In this case, the backup battery assembly can be easily installed even when the structure of the door lock is complicated or the installation space inside the door lock is insufficient. In addition, the protection blocks 20 are installed on both sides of the backup battery assembly 1 in the first direction, and thus the backup battery 1 can be effectively protected even when an impact caused by a vehicle collision accident or the like is transmitted to the backup battery housing 10.

[0068] Meanwhile, the protection block 20 is installed between the backup battery 1 and the backup battery case 10, and thus the interval between the backup battery 1 and the backup battery case 10 should be spaced apart so that the protection block 20 having sufficient rigidity can be installed. For example, the interval between the backup battery 1 and the backup battery case 10 can exceed 2 mm so that the protection block 20 having a thickness of 2 mm or more in the first direction can be installed between the backup battery 1 and the backup battery case 10.

[0069] Embodiment 3 Figure 4 is a cross-sectional view illustrating a backup battery assembly according to Embodiment 3 of the disclosure.

[0070] Embodiment 3 of the disclosure is different from Embodiments 1 and 2 in that the inside of the backup battery case 10 includes a plurality of backup batteries 1, and the protection block 20 is installed on both sides of all of the backup batteries 1. The same content as Embodiments 1 and 2 will be omitted as much as possible, and Embodiment 3 will be described focusing on the difference. That is, it is obvious that the content not described in Embodiment 3 can consider the content of Embodiments 1 and 2 if necessary.

[0071] Referring to Figure 4 , a plurality of protection blocks 20 can be installed in the inside of the backup battery case 10 along the width direction (the first direction) of the backup battery case 10, and the backup battery 1 can be installed between the respective protection blocks 20. In this case, both sides of all of the backup batteries 1 included in the backup battery case 10 in the first direction can be installed with the protection blocks 20, and thus the protection effect of all of the backup batteries 1 installed in the backup battery case 10 can be maximized even when an impact caused by a vehicle collision accident or the like is transmitted to the backup battery case 10.

[0072] Embodiment 4 Figure 5 is a perspective view illustrating a backup battery assembly according to Embodiment 4 of the disclosure, and Figure 6 is a cross-sectional view taken along line B-B of Figure 5 .

[0073] Embodiment 4 of the disclosure is different from Embodiments 1 to 3 in that the seating groove 24 in which the backup battery 1 is seated is formed in the connection portion 23 of the protection block 20. The same content as Embodiments 1 to 3 will be omitted as much as possible, and Embodiment 4 will be described focusing on the difference. That is, it is obvious that the content not described in Embodiment 4 can consider the content of Embodiments 1 to 3 if necessary.

[0074] Referring to Figure 5 and Figure 6A seating groove 24 in which the backup battery 1 is seated is formed in the connecting portion 23 of the protection block 20. Here, the seating groove 24 is formed to correspond to the shape of the backup battery 1, and the backup battery 1 can be stably accommodated in the seating groove 24.

[0075] According to the above-described structure of the protection block 20, even when an external force is transmitted to the backup battery case 10 due to a vehicle collision or the like, the protection block 20 can absorb the impact, thus having an advantage of preventing damage to the backup battery 1. In addition, according to the above-described structure of the protection block 20, even when the backup battery case 10 is shaken due to an external impact, the backup battery 1 is stably accommodated in the seating groove 24, thus having an advantage of preventing the backup battery 1 from moving inside the battery case 10 due to the external impact.

[0076] Meanwhile, the backup battery 1 is a cylindrical battery formed by extending in the length direction (third direction) of the backup battery case 10, and the seating groove 24 can be an arc-shaped groove in which the side surface of the cylindrical battery is seated. Thus, due to the shape of the seating groove 24 as described above, the connecting portion 23 can be formed to be thinnest in the middle portion, and can be thicker toward the upper side and the lower side. In particular, the thickness of each of the upper end portion and the lower end portion of the connecting portion 23 can be formed to be substantially the same as the thickness of the second end portion 22 and the first end portion 21 as described above. According to the above-described structure of the protection block 20, there is an advantage of stably accommodating the backup battery 1, which is a cylindrical battery, inside the battery case 10.

[0077] An insulating coating for insulation from the backup battery 1 can be formed on the outer surface of the protection block 20. Here, the insulating coating can be coated on the main body in different ways. For example, the insulating coating can be coated on the protection block 20 by a powder coating process. In this case, the insulating coating prevents static electricity or the like generated in the backup battery 1 from leaking to the outside, thus having an advantage of protecting electronic components installed around the backup battery case 10.

[0078] Embodiment 5 Figure 7 is a cross-sectional view illustrating a backup battery assembly according to Embodiment 5 of the present disclosure.

[0079] Embodiment 5 of the present disclosure is different from Embodiments 1 to 4 in that a hollow space S is formed inside at least one of the first end portion 21 and the second end portion 22 of the protection block 20. The same content as Embodiments 1 to 4 will be omitted as much as possible, and Embodiment 5 will be described focusing on the difference. That is, it is obvious that the content not described in Embodiment 5 can be considered the content of Embodiments 1 to 4 if necessary.

[0080] Referring to Figure 7Hollow spaces S1, S2 can be formed inside at least one of the first end portion 21 and the second end portion 22 of the protection block 20. The first end portion 21 and the second end portion 22 are made of SUS, aluminum, or steel, and the protection block 20 has a wide cross-sectional width in the horizontal direction, so that the rigidity thereof can be sufficiently ensured even when the hollow spaces S1, S2 are formed inside the first end portion 21 and the second end portion 22.

[0081] Therefore, even when the hollow spaces S1, S2 are formed inside the first end portion 21 and the second end portion 22, the protection block 20 can sufficiently withstand the impact transmitted from the outside, and the direct transmission of the external impact to the backup battery 1 can be prevented to damage the backup battery 1. In addition, when the hollow spaces S1, S2 are formed inside the first end portion 21 and the second end portion 22, the weight of the protection block 20 is reduced, so that it has an advantage of increasing the total energy density of the backup battery assembly.

[0082] On the other hand, the width of the hollow space S1 formed inside the first end portion 21 can be narrowed as it goes upward, and the width of the hollow space S2 formed inside the second end portion 22 can be narrowed as it goes downward. That is, the widths of the hollow spaces S1, S2 formed inside the first end portion 21 and the second end portion 22, respectively, can be narrowed as they approach the connecting portion 22.

[0083] The hollow space S1 formed inside the first end portion 21 and the hollow space S2 formed inside the second end portion 22 can have a structure symmetrical in the vertical direction with respect to the connecting portion 23. In addition, although Figure 7 not shown, the boundary surfaces of the hollow spaces S1, S2 can each be formed as a curved surface.

[0084] In this case, since a sharp edge is not formed inside the first end portion 21 and the second end portion 22, even when an external impact is applied to the protection block 20, there is no region where stress is concentrated in the hollow spaces S1, S2 inside the first end portion 21 and the second end portion 22. Therefore, it has an advantage of preventing the first end portion 21 and the second end portion 22 from being broken due to the concentrated stress.

[0085] The present disclosure has been described above with respect to a limited number of embodiments and drawings, but the present disclosure is not limited thereto, and within the scope of the technical aspects of the present disclosure and the appended claims and equivalents thereof, the present disclosure can be implemented in different forms by those of ordinary skill in the art to which the present disclosure belongs.

[0086] [Legend of Reference Numerals] 1: backup battery 10: backup battery case 11: first case 12: second case 20: protection block 21: first end portion 22: second end portion 23: connecting portion 24: housing groove 30: backup battery housing portion 31: first housing portion 32: second housing portion D: diameter of backup battery S1, S2: hollow space hi: length of protection block in second direction h2: length of connecting portion in second direction

Claims

1. A backup battery assembly, comprising: A backup battery supplies current to the door lock when the main power supply to the door lock is cut off. A backup battery casing for housing the backup battery; as well as A protective block is installed inside the backup battery casing to protect the backup battery. The protection block includes: The first end is connected to one side of the interior of the backup battery casing; The second end is joined to another side inside the backup battery casing; and A connecting portion connects the first end and the second end between the first end and the second end. Wherein, the cross-sectional widths of the first end and the second end in the width direction (hereinafter referred to as the first direction) of the backup battery housing are greater than the cross-sectional width of the connecting portion in the first direction, and The protective block is a rigid block made of SUS, aluminum, or steel.

2. The backup battery assembly according to claim 1, in, The cross-sectional width of the first end in the first direction increases as it moves from the connecting portion side toward the interior of the spare battery housing, and The cross-sectional width of the second end in the first direction increases as it moves from the connecting portion side toward the interior of the spare battery housing on the other side.

3. The backup battery assembly according to claim 2, wherein, The cross-sectional width of the connecting portion in the first direction is constant.

4. The backup battery assembly according to claim 2, wherein, The shapes of the first end and the second end are symmetrical with respect to the connecting portion.

5. The backup battery assembly according to claim 4, wherein, The backup battery is a cylindrical battery formed by extending the backup battery casing along its length.

6. The backup battery assembly according to claim 5, wherein, The length of the protective block in the height direction (hereinafter referred to as the second direction) of the backup battery casing is longer than the diameter of the backup battery.

7. The backup battery assembly according to claim 6, wherein, The length of the connecting portion in the second direction is shorter than the diameter of the backup battery.

8. The backup battery assembly according to claim 4, wherein, The backup battery housing includes a backup battery housing section in which the backup battery is housed.

9. The backup battery assembly according to claim 8, in, The backup battery housing includes: The first mounting portion is installed on one side inside the backup battery casing; and The second mounting section is installed on the other side inside the spare battery casing.

10. The backup battery assembly according to claim 9, wherein, Each of the first and second mounting portions has a curved mounting surface corresponding to the side shape of the backup battery.

11. The backup battery assembly according to claim 1, wherein, The backup battery casing is made of insulating material.

12. The backup battery assembly according to claim 1, in, Inside the backup battery housing, a plurality of backup batteries are installed along the width direction of the backup battery housing, and The protection block is installed between each of the backup batteries.

13. The backup battery assembly according to claim 1, in, A backup battery is installed inside the backup battery casing, and The backup battery has protective blocks installed on both sides of the backup battery housing in the width direction.

14. The backup battery assembly according to claim 1, in, Inside the backup battery housing, a plurality of protective blocks are installed along the width direction of the backup battery housing, and The backup battery is installed between each of the protection blocks.

15. The backup battery assembly according to claim 1, wherein, The connection portion has a mounting slot in which the backup battery is placed.

16. The backup battery assembly according to claim 15, in, The backup battery is a cylindrical battery formed by extending the backup battery casing along its length. The mounting groove is an arc-shaped recess on the side of the cylindrical battery into which it is mounted.

17. The backup battery assembly according to claim 18, wherein, An insulating coating is formed on the surface of the protective block.

18. The backup battery assembly according to claim 1, wherein, A hollow space is formed inside at least one of the first end and the second end.

19. The backup battery assembly according to claim 18, wherein, The width of the hollow space formed inside the first end narrows as it approaches the connecting portion.

20. The backup battery assembly according to claim 18, wherein, The width of the hollow space formed inside the second end narrows as it approaches the connecting portion.

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