Backup battery unit and electric device

Abstract

The application relates to the technical field of power supply, and discloses a backup battery unit and a power consumption equipment. The backup battery unit comprises a shell, at least two battery assemblies and a circuit board assembly. The at least two battery assemblies are arranged in the shell along a first direction. The battery assembly comprises a battery support and a battery group. The battery group is fixed to the battery support. Along the first direction, the adjacent battery supports are connected and fixed to each other. The battery group comprises a columnar battery. The columnar battery comprises a positive electrode and a negative electrode arranged oppositely along the first direction. Along the first direction, the circuit board assembly is arranged on one side of the at least two battery assemblies. The circuit board assembly is electrically connected with the battery assembly. In the above manner, the application can meet the spatial installation requirements of more power consumption equipment.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to a backup battery unit and electrical equipment. Background Technology

[0002] Backup battery units are used to provide temporary power to electrical equipment during power outages, ensuring continuous operation of the equipment or system and preventing data loss or functional interruption. In related technologies, backup battery units typically consist of multiple cylindrical cells arranged side-by-side to form a large rectangular battery cluster with multiple rows and columns. The installation space constraints of such large battery clusters are significant, making it difficult to meet the diverse space installation requirements of electrical equipment. Utility Model Content

[0003] In view of the problems existing in the background art, this application provides a backup battery unit and electrical equipment to meet the space installation requirements of more electrical equipment.

[0004] According to a first aspect of this application, a backup battery unit is provided, including a housing, at least two battery modules, and a circuit board assembly. The at least two battery modules are arranged within the housing along a first direction. Each battery module includes a battery support and a battery cluster, with the battery cluster fixed to the battery support. Adjacent battery supports are interconnected and fixed along the first direction. The battery cluster includes cylindrical cells, each cylindrical cell including a positive terminal and a negative terminal disposed opposite to each other along the first direction. Along the first direction, the circuit board assembly is disposed on one side of the at least two battery modules and is electrically connected to the battery modules.

[0005] In one or more of the above optional embodiments, the battery pack includes a first battery pack and a second battery pack. The first battery pack includes at least two cylindrical cells arranged along a second direction, and the second battery pack includes at least two cylindrical cells arranged along the second direction. The first battery pack and the second battery pack are arranged along a third direction. The first direction, the second direction, and the third direction are all perpendicular to each other.

[0006] In one or more of the above optional embodiments, the cylindrical battery is a cylindrical battery. Along the third direction, the projection of one cylindrical battery in the first battery pack overlaps with a portion of the projection of one cylindrical battery in the second battery pack, while the other portion of the projection is separate. Along the third direction, the height H of the battery pack satisfies: 33.6mm < H ≤ 37mm.

[0007] In one or more of the above optional embodiments, the battery holder is provided with an air duct extending along a first direction, and two adjacent columnar batteries from the first battery pack and two adjacent columnar batteries from the second battery pack are arranged around the outer side of the air duct. The air duct is connected between at least two battery components to allow airflow.

[0008] In one or more of the above optional embodiments, the battery assembly includes a positive electrode busbar and a negative electrode busbar, which are disposed opposite each other on opposite sides of the battery pack along a first direction. The backup battery cell includes a heat insulation sheet, and along the first direction, at least one heat insulation sheet is disposed between the positive electrode busbar of one battery assembly and the negative electrode busbar of another battery assembly between two adjacent battery assemblies.

[0009] In one or more of the above optional embodiments, the positive electrode busbar is provided with a first connection portion, the negative electrode busbar is provided with a second connection portion, the heat insulation sheet is staggered from the first connection portion and the second connection portion, and in two adjacent battery components, the first connection portion of one battery component is connected to the second connection portion of the other battery component.

[0010] In one or more of the above optional embodiments, along the first direction, the positive terminal busbar of the battery assembly located at the first end is provided with a general positive connection portion, which is electrically connected to the circuit board assembly; the negative terminal busbar of the battery assembly located at the tail end is provided with a general negative connection portion; the backup battery unit further includes a negative terminal connecting strip, which includes a third end and a fourth end disposed opposite to each other along the first direction; the third end is connected to the general negative connection portion; and along a direction opposite to the first direction, the fourth end protrudes from the battery assembly located at the first end, which is electrically connected to the circuit board assembly.

[0011] In one or more of the above optional embodiments, along the first direction, the battery holder includes a first frame and a second frame disposed opposite to each other. The first frame has a first limiting groove on the side facing away from the second frame, and the first limiting groove has a positive electrode busbar. The second frame has a second limiting groove on the side facing away from the first frame, and the second limiting groove has a negative electrode busbar. The first limiting groove and / or the second limiting groove are provided with heat insulation sheets.

[0012] In one or more of the above optional embodiments, along the first direction, the battery holder includes a first frame and a second frame disposed opposite to each other. The first frame is provided with a first snap-fit ​​portion and a first insertion portion, and the second frame is provided with a second snap-fit ​​portion and a second insertion portion. Along the first direction, the first snap-fit ​​portion of one battery holder engages with the second snap-fit ​​portion of another battery holder, and the first insertion portion of one battery holder engages with the second insertion portion of another battery holder; and / or the first frame is provided with a first connecting post, a second connecting post, and a first mounting hole, and the second frame is provided with a third connecting post, a fourth connecting post, and a second mounting hole. Along the first direction, the first connecting post includes a fifth end and a sixth end disposed opposite to each other, and the second connecting post includes a seventh end disposed opposite to each other. The first and second frames are connected to the first frame, the third connecting post includes the ninth and tenth ends arranged opposite each other, the fourth connecting post includes the eleventh and twelfth ends arranged opposite each other, the fifth and seventh ends are connected to the first frame, the ninth and eleventh ends are connected to the second frame, the sixth end is provided with a third latching part, the tenth end is provided with a fourth latching part, the eighth end is provided with a third insertion part, and the twelfth end is provided with a fourth insertion part. Along the first direction, the third latching part is latched into the fourth latching part, and the third insertion part is inserted into the fourth insertion part. The positive electrode is provided in the first mounting hole, and the negative electrode is provided in the second mounting hole.

[0013] In one or more of the above optional embodiments, the battery assembly includes a positive electrode connector. Along a first direction, the positive electrode connector is disposed between the positive electrode of the battery and the positive electrode busbar. The positive electrode connector includes a first main body portion and a first elastic connecting portion connected to each other. The number of first elastic connecting portions is the same as the number of cylindrical cells in the battery assembly and they are arranged in a one-to-one correspondence. Along a direction opposite to the first direction, the positive electrode of a cylindrical cell abuts against a first elastic connecting portion, and the first main body portion abuts against the positive electrode busbar. The first elastic connecting portion undergoes elastic deformation relative to the first main body portion in a direction away from the positive electrode to generate… An elastic force acting on the positive electrode; and / or the battery assembly includes a negative electrode connector, which is disposed between the negative electrode of the battery and the negative electrode busbar along a first direction. The negative electrode connector includes a second main body and a second elastic connection portion connected to each other. The number of second elastic connection portions is the same as the number of cylindrical cells in the battery assembly and they are arranged in a one-to-one correspondence. Along the first direction, the negative electrode of a cylindrical cell abuts against a second elastic connection portion, and the second main body abuts against the negative electrode busbar. The second elastic connection portion undergoes elastic deformation relative to the second main body portion in a direction away from the negative electrode to generate an elastic force acting on the negative electrode.

[0014] According to a second aspect of this application, an electrical device is provided, including the aforementioned backup battery unit.

[0015] The beneficial effects of the embodiments of this application are as follows: The backup battery unit provided in the embodiments of this application includes a positive electrode and a negative electrode arranged opposite to each other along a first direction. The cylindrical batteries of the backup battery unit are arranged separately to form at least two battery groups. The at least two battery groups are respectively arranged on at least two battery supports to form at least two battery components arranged along the first direction. Compared with the related technology in which all cylindrical batteries are arranged side by side to form a large rectangular battery group with multiple rows and columns, the cylindrical batteries of the embodiments of this application are distributed in at least two battery components arranged along the first direction. The number of battery components can be set according to actual needs, which can adapt to more installation space requirements. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 A schematic diagram of a backup battery unit provided in an embodiment of this application; Figure 2 A fractured view of a backup battery unit with a hidden portion of the housing provided in an embodiment of this application; Figure 3 for Figure 1 Schematic diagram of the cross section at point AA; Figure 4 A schematic diagram of a backup battery unit's battery pack and battery bracket provided for an embodiment of this application; Figure 5 Another schematic diagram of a backup battery unit's battery pack and battery bracket provided in an embodiment of this application. Figure 6 Another fractured view of a backup battery unit housing hidden in an embodiment of this application; Figure 7 An exploded view of two adjacent battery components in a backup battery unit is provided in this application embodiment; Figure 8 This application provides a schematic diagram of a backup battery unit's battery assembly and a second circuit board; Figure 9 This application provides a schematic diagram of the first frame of a backup battery unit according to an embodiment; Figure 10 This application provides a schematic diagram of the second frame of a backup battery unit. Detailed Implementation

[0018] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0020] In the description of this specification, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0022] Please see Figures 1-5 The backup battery unit 1000 includes a housing 1, at least two battery components 2, and a circuit board assembly 3. The at least two battery components 2 are arranged within the housing 1 along a first direction X. Each battery component 2 includes a battery support 21 and a battery cluster 22. The battery cluster 22 is fixed to the battery support 21. Adjacent battery supports 21 are interconnected and fixed along the first direction X. The battery cluster 22 includes cylindrical batteries 221, each cylindrical battery 221 including a positive electrode 2211 and a negative electrode 2212 disposed opposite to each other along the first direction X. The circuit board assembly 3 is disposed on one side of the at least two battery components 2 along the first direction X and is electrically connected to the battery components 2.

[0023] The backup battery unit 1000 provided in this application embodiment includes cylindrical batteries 221 comprising a positive electrode 2211 and a negative electrode 2212 arranged opposite to each other along a first direction X. The cylindrical batteries 221 of the backup battery unit 1000 are separately arranged to form at least two battery groups 22. The at least two battery groups 22 are respectively arranged on at least two battery supports 21 to form at least two battery components 2 arranged along the first direction X. Compared with the related technology in which all cylindrical batteries 221 are arranged side by side to form a large rectangular battery group with multiple rows and columns, the cylindrical batteries 221 of this application embodiment are distributed in at least two battery components 2 arranged along the first direction X. The number of battery components 2 can be set according to actual needs, which can adapt to more installation space requirements.

[0024] In some embodiments, the circuit board assembly 3 is provided with a DC voltage regulator circuit, which is used to convert the voltage output by at least two battery assemblies 2 into a stable and accurate output voltage.

[0025] In some embodiments, the circuit board assembly 3 includes a plurality of first circuit boards, which constitute a battery management unit for charging and discharging management of the cylindrical cells 221 of at least two battery assemblies 2.

[0026] Please see Figure 1 and Figure 3 In some embodiments, the battery pack 22 includes a first battery pack 22a and a second battery pack 22b. The first battery pack 22a includes at least two cylindrical batteries 221 arranged along a second direction Y, and the second battery pack 22b includes at least two cylindrical batteries 221 arranged along a second direction Y. The first battery pack 22a and the second battery pack 22b are arranged along a third direction Z. The first direction X, the second direction Y, and the third direction Z are all perpendicular to each other.

[0027] In some embodiments, the cylindrical battery 221 is a cylindrical battery. Along the third direction Z, the projection of one cylindrical battery 221 of the first battery pack 22a overlaps with a portion of the projection of one cylindrical battery 221 of the second battery pack 22b, while the other portion of the projection is separate. Compared to the situation where the projection of a cylindrical battery 221 of the first battery pack 22a overlaps with a portion of the cylindrical battery 221 of the second battery pack 22b along the third direction Z, this embodiment of the application misaligns the first battery pack 22a and the second battery pack 22b along the third direction Z. This results in the projection of a cylindrical battery 221 of the first battery pack 22a overlapping with a portion of the projection of a cylindrical battery 221 of the second battery pack 22b, while the other portion of the projection is separate. At least a portion of a cylindrical battery 221 of the first battery pack 22a can be accommodated in the space between two adjacent cylindrical batteries 221 of the second battery pack 22b. Similarly, at least a portion of a cylindrical battery 221 of the second battery pack 22b can be accommodated in the space between two adjacent cylindrical batteries 221 of the first battery pack 22a. This helps to reduce the height of the battery pack 22 along the third direction Z and reduce the space required by the battery pack 22.

[0028] In practical use, the diameter R of the cylindrical battery is 18mm~18.5mm. Along the first direction X, the projection of the cylindrical battery 221 of the battery group 22 is a circle with a minimum radius of 9mm. When the projections of the cylindrical battery 221 of the battery group 22 are tangent to each other, the height H of the battery group 22 along the third direction Z is the minimum, H≈33.6mm.

[0029] In the power supply field, "1U" refers to a device with a height of 44.45 mm (or 1.75 inches). The design purpose of a 1U power supply is to maximize space utilization while providing efficient and reliable power output. In some embodiments, along the third direction Z, the height H of the battery pack 22 satisfies: 33.6 mm < H ≤ 37 mm. By setting the height of the battery pack 22 to less than or equal to 37 mm, it is beneficial to control the size of the backup battery unit 1000 to 1U or less, so as to meet the design requirements of a 1U power supply.

[0030] Please see Figure 2 and Figure 3 In some embodiments, the battery holder 21 is provided with an air duct 23 extending along a first direction X. Two adjacent cylindrical batteries 221 from the first battery pack 22a and two adjacent cylindrical batteries 221 from the second battery pack 22b are arranged around the outer side of the air duct 23. The air duct 23 is connected between at least two battery packs 2, allowing airflow through it. For example, in some embodiments, the first battery pack 22a includes three cylindrical batteries 221, the second battery pack 22b includes three cylindrical batteries 221, and the battery holder 21 is provided with two air ducts 23.

[0031] In some embodiments, the backup battery unit 1000 includes a fan 4, which is located on the side of at least two battery components 2 facing away from the circuit board assembly 3. The fan 4 is used to drive airflow through the air duct 23.

[0032] Please see Figure 3 and Figure 6 In some embodiments, the backup battery unit 1000 includes a second circuit board 5. The second circuit board 5 is disposed on one side of at least two battery components 2 along a direction perpendicular to the first direction X. The second circuit board 5 includes a first end 5a and a second end 5b disposed opposite to each other along the first direction X. The first end 5a is disposed close to the circuit board assembly 3 and is electrically connected to the circuit board assembly 3.

[0033] In some embodiments, along a direction opposite to the first direction X, a first end 5a protrudes from the battery assembly 2 located at the head end 2a along the first direction X, and along the first direction X, a second end 5b protrudes from the battery assembly 2 located at the tail end 2b along the first direction X.

[0034] In some embodiments, the fan 4 is electrically connected to the second end 5b, and the fan 4 is electrically connected to the circuit board assembly 3 via the second circuit board 5.

[0035] In some embodiments, the battery pack 22 is electrically connected to the second circuit board 5, and the circuit board assembly 3 is provided with a monitoring circuit. The battery pack 22 is electrically connected to the monitoring circuit through the second circuit board 5. The monitoring circuit is used to monitor the voltage of the battery pack 22.

[0036] In some embodiments, the backup battery unit 1000 includes an indicator light (not shown), a battery holder 21 is provided with at least one indicator light, the indicator light is electrically connected to the second circuit board 5, and the indicator light is electrically connected to the circuit board assembly 3 through the second circuit board 5.

[0037] Please see Figures 3-7 In some embodiments, the battery assembly 2 includes a positive electrode busbar 24 and a negative electrode busbar 25, which are disposed opposite each other on opposite sides of the battery group 22 along a first direction X.

[0038] In some embodiments, the positive electrode 2211 is disposed toward the positive electrode busbar 24, the positive electrode busbar 24 is electrically connected to the positive electrode 2211, the negative electrode busbar 25 is electrically connected to the negative electrode 2212, and the cylindrical cells 221 in the battery group 22 are connected in parallel through the positive electrode busbar 24 and the negative electrode busbar 25.

[0039] In some embodiments, the backup battery unit 1000 includes a heat insulation sheet 6. Along a first direction X, at least one heat insulation sheet 6 is disposed between the positive electrode busbar 24 of one battery component 2 and the negative electrode busbar 25 of another battery component 2 between two adjacent battery components 2. By setting the heat insulation sheet 6 to separate adjacent battery groups 22 in the first direction X, the heat insulation sheet 6 is used to block the spread of high-temperature and high-pressure gas or flame, which helps to reduce the risk of thermal runaway propagation of the cylindrical battery 221 and improves the safety and reliability of the backup battery unit 1000.

[0040] In some embodiments, the heat insulation sheet 6 includes, but is not limited to, a mica sheet.

[0041] In some embodiments, the positive electrode busbar 24 is provided with a first ventilation hole 241, the negative electrode busbar 25 is provided with a second ventilation hole 251, and the heat insulation sheet 6 is provided with a third ventilation hole 61. Along the first direction X, the air duct 23 between at least two battery components 2 is connected through the first ventilation hole 241, the second ventilation hole 251 and the third ventilation hole 61.

[0042] In some embodiments, the positive electrode busbar 24 between two adjacent battery groups 22 is provided with a first connection portion 242, the negative electrode busbar 25 is provided with a second connection portion 252, and the heat insulation sheet 6 is staggered from the first connection portion 242 and the second connection portion 252. In two adjacent battery components 2, the first connection portion 242 of one battery component 2 is connected to the second connection portion 252 of the other battery component 2, and the two adjacent battery groups 22 are connected in series through the first connection portion 242 and the second connection portion 252.

[0043] In some embodiments, the first connecting portion 242 includes a first connecting piece 2421, which is connected to the positive electrode busbar 24; the second connecting portion 252 includes a second connecting piece 2521, which is connected to the negative electrode busbar 25; the first connecting piece 2421 and the second connecting piece 2521 are arranged parallel to each other along the second direction Y; and the first connecting piece 2421 is attached to the second connecting piece 2521 along the second direction Y.

[0044] In some embodiments, the first connecting piece 2421 is welded to the second connecting piece 2521.

[0045] In some embodiments, the first connecting portion 242 includes a first plug-in piece 2422 connected to the first connecting piece 2421, and the second connecting portion 252 includes a second plug-in piece 2522 connected to the second connecting piece 2521. The first plug-in piece 2422 and the second plug-in piece 2522 are electrically connected to the second circuit board 5. The positive electrode 2211 of each cylindrical battery 221 in the battery group 22 is electrically connected to the second circuit board 5 through the first plug-in piece 2422, and the negative electrode 2212 of each cylindrical battery 221 in the battery group 22 is electrically connected to the second circuit board 5 through the second plug-in piece 2522.

[0046] In some embodiments, the second circuit board 5 is provided with a first through hole 51, and a first connector 2422 and a second connector 2522 are disposed opposite to each other. Along the direction of at least two battery assemblies 2 toward the second circuit board 5, the first connector 2422 and the second connector 2522 are inserted into the first through hole 51. The first through hole 51 is provided with a first pad (not shown in the figure), and the first connector 2422 and the second connector 2522 are soldered to the first pad.

[0047] In some embodiments, the second circuit board 5 is disposed on the side of the first connecting piece 2421 and the second connecting piece 2521 facing away from the battery assembly 2. Along the direction of the second circuit board 5 toward the battery assembly 2, the second circuit board 5, the second connecting piece 2521 and the first connecting piece 2421 are arranged in sequence. Along the direction of the second circuit board 5 toward the battery assembly 2, the second circuit board is screwed and fixed to the battery bracket 21.

[0048] Please see Figure 6 and Figure 8 In some embodiments, along the first direction X, the positive terminal busbar 24 of the battery assembly 2 located at the first end 2a is provided with a total positive connection portion 243, which is electrically connected to the circuit board assembly 3. The negative terminal busbar 25 of the battery assembly 2 located at the tail end 2b is provided with a total negative connection portion 253. The backup battery unit 1000 also includes a negative terminal connecting strip 7, which includes a third end 7a and a fourth end 7b arranged opposite to each other along the first direction X. The third end 7a is connected to the total negative connection portion 253. Along the direction opposite to the first direction X, the fourth end 7b protrudes from the battery assembly 2 located at the first end 2a and is electrically connected to the circuit board assembly 3.

[0049] In some embodiments, the third end 7a abuts against the main negative connection portion 253, and the third end 7a is screwed and fixed to the main negative connection portion 253.

[0050] Please see Figure 2In some embodiments, the circuit board assembly 3 is provided with a positive input connection portion 31 and a negative input connection portion 32, the main positive connection portion 243 is screwed and fixed to the positive input connection portion 31, and the fourth end portion 7b is screwed and fixed to the negative input connection portion 32.

[0051] Please see Figure 7 , Figure 9 and Figure 10 In some embodiments, along the first direction X, the battery holder 21 includes a first frame 211 and a second frame 212 disposed opposite to each other. The first frame 211 has a first limiting groove 2111 on the side facing away from the second frame 212, and the first limiting groove 2111 has a positive electrode busbar 24. The second frame 212 has a second limiting groove 2121 on the side facing away from the first frame 211, and the second limiting groove 2121 has a negative electrode busbar 25. The first limiting groove 2111 and / or the second limiting groove 2121 are provided with heat insulation sheets 6.

[0052] In some embodiments, the first limiting groove 2111 is provided with at least two first positioning posts 2112, the positive electrode busbar 24 is provided with at least two first positioning holes 244, and a first positioning post 2112 is inserted into a first positioning hole 244.

[0053] In some embodiments, the second limiting groove 2121 is provided with at least two second positioning posts 2122, the negative electrode busbar 25 is provided with at least two second positioning holes 254, and a second positioning post 2122 is inserted into a second positioning hole 254.

[0054] In some embodiments, along the first direction X, the battery bracket 21 includes a first frame 211 and a second frame 212 disposed opposite to each other. The first frame 211 is provided with a first latching portion 2113 and a first insertion portion 2114, and the second frame 212 is provided with a second latching portion 2123 and a second insertion portion 2124. Along the first direction X, the first latching portion 2113 of one battery bracket 21 is latched to the second latching portion 2123 of another battery bracket 21, and the first insertion portion 2114 of one battery bracket 21 is inserted to the second insertion portion 2124 of another battery bracket 21. By setting the first latching portion 2113 to latch the second latching portion 2123 along the first direction X, and the first insertion portion 2114 to insert the second insertion portion 2124 along the first direction X, the latching and insertion methods cooperate to improve the convenience of disassembly and assembly between the battery brackets 21 and the stability of the installation.

[0055] In some embodiments, the first latching part 2113 is a latching hook, and the second latching part 2123 is a latching protrusion protruding from the surface of the second frame 212, with the hook head latching onto the latching protrusion.

[0056] In some embodiments, the first plug portion 2114 is generally cylindrical and extends along the first direction X, and the second plug portion 2124 corresponds to a groove extending along the first direction X.

[0057] Please see Figure 3 , Figure 4 , Figure 5 , Figure 9 and Figure 10 In some embodiments, the first frame 211 is provided with a first connecting post 2115, a second connecting post 2116 and a first mounting hole 2117, and the second frame 212 is provided with a third connecting post 2125, a fourth connecting post 2126 and a second mounting hole 2127. Along the first direction X, the first connecting post 2115 includes a fifth end 2115a and a sixth end 2115b disposed opposite to each other; the second connecting post 2116 includes a seventh end 2116a and an eighth end 2116b disposed opposite to each other; the third connecting post 2125 includes a ninth end 2125a and a tenth end 2125b disposed opposite to each other; and the fourth connecting post 2126 includes an eleventh end 2125a and a tenth end 2125b disposed opposite to each other. 26a and the twelfth end 2126b, the fifth end 2115a and the seventh end 2116a are connected to the first frame 211, the ninth end 2125a and the eleventh end 2126a are connected to the second frame 212, the sixth end 2115b is provided with a third latching part, the tenth end 2125b is provided with a fourth latching part, the eighth end 2116b is provided with a third insertion part, and the twelfth end 2126b is provided with a fourth insertion part 2126c. Along the first direction X, the third latching part is latched into the fourth latching part, and the third insertion part is inserted into the fourth insertion part 2126c. The positive electrode 2211 is provided in the first mounting hole 2117, and the negative electrode 2212 is provided in the second mounting hole 2127. By setting the third latching part to latch onto the fourth latching part along the first direction X, and the third insertion part to insert into the fourth insertion part along the first direction X, the latching and insertion methods are combined to improve the convenience of disassembly and assembly between the first frame 211 and the second frame 212 and the stability of the installation.

[0058] In some embodiments, the third latching part is a latching hole 2115c provided at the sixth end 2115b, and the fourth latching part is a latching protrusion 2125c protruding from the surface of the tenth end 2125b, with the latching protrusion latching 2125c into the latching hole 2115c.

[0059] In some embodiments, the fourth plug portion 2126c is a column extending along the first direction X, and the third plug portion is a groove extending along the first direction X.

[0060] Please see Figures 3-5 and Figures 7-10In some embodiments, the battery assembly 2 includes a positive electrode connector 26. Along the first direction X, the positive electrode connector 26 is disposed between the positive electrode 2211 of the cylindrical battery 221 and the positive electrode busbar 24. The positive electrode connector 26 includes a first main body portion 261 and a first elastic connection portion 262 connected to each other. The number of first elastic connection portions 262 is the same as the number of cylindrical batteries 221 in the battery assembly 2 and they are arranged in a one-to-one correspondence. Along the direction opposite to the first direction X, the positive electrode 2211 of a cylindrical battery 221 abuts against a first elastic connection portion 262, and the first main body portion 261 abuts against the positive electrode busbar 24. The first elastic connection portion 262 undergoes elastic deformation relative to the first main body portion 261 in the direction away from the positive electrode 2211 to generate an elastic force acting on the positive electrode 2211. The first elastic connection portion 262 undergoes elastic deformation relative to the first main body portion 261 in the direction away from the positive electrode 2211, thereby generating an elastic force acting on the positive electrode 2211. This is beneficial to improving the contact effect between the positive electrode 2211 and the first elastic connection portion 262, thereby improving the conductivity between the positive electrode 2211 and the first elastic connection portion 262, and also beneficial to reducing the damage to the positive electrode 2211 caused by rigid compression.

[0061] In some embodiments, the positive electrode 2211 is welded to the first elastic connection portion 262, and the first main body portion 261 is welded to the positive electrode busbar 24.

[0062] In some embodiments, the first main body 261 is provided with a fourth ventilation hole 263, and along the first direction X, the air duct 23 between at least two battery components 2 is connected through the first ventilation hole 241, the second ventilation hole 251, the third ventilation hole 61 and the fourth ventilation hole 263.

[0063] In some embodiments, the first main body 261 is provided with two third positioning holes 264, the positive electrode connecting piece 26 is provided in the first limiting groove 2111, and a first positioning post 2112 is inserted into a third positioning hole 264.

[0064] In some embodiments, the positive electrode busbar 24 is provided with a first clearance hole 245, which is aligned with the first elastic connection portion 262 along the first direction X. The first clearance hole 245 is used to allow the first elastic connection portion 262 to avoid the first elastic connection portion 262 when it undergoes elastic deformation in a direction away from the positive electrode 2211 it abuts.

[0065] In some embodiments, the first main body portion 261 is provided with a first receiving hole 266, which is aligned with the positive electrode 2211 along the first direction X. The first elastic connecting portion 262 includes a first connecting end portion 262a and a first free end portion 262b. The first connecting end portion 262a is connected to the first main body portion 261, and the first free end portion 262b is disposed in the first receiving hole 266. The first free end portion 262b is connected to the first connecting end portion 262a. The positive electrode 2211 abuts against the first free end portion 262b in a direction opposite to the first direction X. The first free end portion 262b is elastically bent relative to the first connecting end portion 262a in a direction opposite to the first direction X.

[0066] In some embodiments, the first free end 262b is at least partially located in the first clearance hole 245.

[0067] In some embodiments, the battery assembly 2 includes a negative electrode connecting piece 27. Along a first direction X, the negative electrode connecting piece 27 is disposed between the negative electrode 2212 of the cylindrical battery 221 and the negative electrode busbar 25. The negative electrode connecting piece 27 includes a second main body portion 271 and a second elastic connecting portion 272 connected to each other. The number of second elastic connecting portions 272 is the same as the number of cylindrical batteries 221 in the battery assembly 2 and they are arranged in a one-to-one correspondence. Along the first direction X, the negative electrode 2212 of a cylindrical battery 221 abuts against a second elastic connecting portion 272, and the second main body portion 271 abuts against the negative electrode busbar 25. The second elastic connecting portion 272 undergoes elastic deformation relative to the second main body portion 271 in a direction away from the negative electrode 2212 to generate an elastic force acting on the negative electrode 2212. The second elastic connection portion 272 undergoes elastic deformation relative to the second main body portion 271 in the direction away from the positive electrode 2211, thereby generating an elastic force acting on the negative electrode 2212. This is beneficial to improving the contact effect between the negative electrode 2212 and the second elastic connection portion 272, thereby improving the conductivity between the negative electrode 2212 and the second elastic connection portion 272, and also beneficial to reducing the damage to the negative electrode 2212 caused by rigid compression.

[0068] In some embodiments, the negative electrode connector 27 is provided with a fifth ventilation hole 273, and along the first direction X, the air duct 23 between at least two battery components 2 is connected through the first ventilation hole 241, the second ventilation hole 251, the third ventilation hole 61 and the fifth ventilation hole 273.

[0069] In some embodiments, the second main body 271 is provided with two fourth positioning holes 274, the negative electrode connecting piece 27 is provided in the second limiting groove 2121, and a second positioning post 2122 is inserted into a fourth positioning hole 274.

[0070] In some embodiments, the negative electrode busbar 25 is provided with a second clearance hole 255, which is aligned with the second elastic connection portion 272 along the first direction X. The second clearance hole 255 is used to allow the second elastic connection portion 272 to avoid the second elastic connection portion 272 when it undergoes elastic deformation in a direction away from the negative electrode 2212 it abuts.

[0071] In some embodiments, the second main body portion 271 is provided with a second receiving hole 276, which is aligned with the negative electrode 2212 along the first direction X. The second elastic connecting portion 272 includes a second connecting end portion 272a and a second free end portion 272b. The second connecting end portion 272a is connected to the second main body portion 271, and the second free end portion 272b is disposed in the second receiving hole 276. The second free end portion 272b is connected to the second connecting end portion 272a. The negative electrode 2212 abuts against the second free end portion 272b along the first direction X, and the second free end portion 272b is elastically bent relative to the second connecting end portion 272a along the first direction X.

[0072] In some embodiments, the second free end 272b is at least partially located in the second clearance hole 255.

[0073] Please see Figures 5-7 In some embodiments, the positive electrode 2211 is arranged in a direction opposite to the first direction X. Along the first direction X, the positive electrode connecting piece 26 of the battery assembly 2 located at the first end 2a is provided with a third connector 265, and the negative electrode connecting piece 27 of the battery assembly 2 located at the tail end 2b is provided with a fourth connector 275. The third connector 265 and the fourth connector 275 are electrically connected to the second circuit board 5. The positive electrode 2211 of each cylindrical battery 221 of the battery assembly 2 located at the first end 2a is electrically connected to the second circuit board 5 through the third connector 265, and the negative electrode 2212 of each cylindrical battery 221 of the battery assembly 2 located at the tail end 2b is electrically connected to the second circuit board 5 through the fourth connector 275.

[0074] In some embodiments, the second circuit board 5 is provided with a second through hole 52. Along the direction from the battery assembly 2 to the second circuit board 5, a third connector 265 is inserted into the second through hole 52. The second through hole 52 is provided with a second pad (not shown). The third connector 265 is soldered to the second pad.

[0075] In some embodiments, the second circuit board 5 is provided with a third through hole 53. Along the direction from the battery assembly 2 to the second circuit board 5, a fourth connector 275 is inserted into the third through hole 53. The third through hole 53 is provided with a third pad (not shown in the figure), and the fourth connector 275 is soldered to the third pad.

[0076] Based on the same inventive concept, this application also provides an electrical device, including the backup battery unit 1000 in any of the above embodiments.

[0077] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A backup battery unit, characterized in that, include: case; At least two battery assemblies are arranged in the housing along a first direction. Each battery assembly includes a battery support, a battery cluster, a positive electrode busbar, and a negative electrode busbar. The battery cluster is fixed to the battery support. Adjacent battery supports are connected and fixed to each other along the first direction. The battery cluster includes cylindrical cells. Each cylindrical cell includes a positive electrode and a negative electrode arranged opposite to each other along the first direction. The positive electrode busbar and the negative electrode busbar are arranged opposite to each other on opposite sides of the battery cluster along the first direction. A circuit board assembly, along the first direction, is disposed on one side of the at least two battery assemblies, and the circuit board assembly is electrically connected to the battery assemblies; A heat insulation sheet, along the first direction, is disposed between the positive electrode busbar of one battery assembly and the negative electrode busbar of the other battery assembly between two adjacent battery assemblies.

2. The backup battery unit according to claim 1, characterized in that, The battery pack includes a first battery pack and a second battery pack. The first battery pack includes at least two cylindrical batteries arranged along a second direction, and the second battery pack includes at least two cylindrical batteries arranged along the second direction. The first battery pack and the second battery pack are arranged along a third direction. Wherein, the first direction, the second direction, and the third direction are mutually perpendicular to each other.

3. The backup battery unit according to claim 2, characterized in that, The cylindrical battery is a cylindrical battery. Along the third direction, the projection of one of the cylindrical batteries in the first battery pack overlaps with a portion of the projection of one of the cylindrical batteries in the second battery pack, while the other portion of the projection is separate. Along the third direction, the height H of the battery pack satisfies: 33.6mm < H ≤ 37mm.

4. The backup battery unit according to claim 3, characterized in that, The battery bracket is provided with an air duct that runs through the first direction, and the outer side of the air duct is provided with two adjacent columnar batteries in the first battery pack and two adjacent columnar batteries in the second battery pack. The air duct connection between the at least two battery components allows airflow to pass through the air duct.

5. The backup battery unit according to claim 1, characterized in that, The positive electrode busbar has a first connection portion, and the negative electrode busbar has a second connection portion. The heat insulation sheet is staggered from the first connection portion and the second connection portion. In two adjacent battery assemblies, the first connection portion of one battery assembly is connected to the second connection portion of the other battery assembly.

6. The backup battery unit according to claim 1, characterized in that, Along the first direction, the positive terminal busbar of the battery assembly located at the first end has a total positive connection portion, which is electrically connected to the circuit board assembly. The negative terminal busbar of the battery assembly located at the tail end has a total negative connection portion. The backup battery unit further includes a negative terminal connecting strip, which includes a third end and a fourth end disposed opposite to each other along the first direction. The third end is connected to the total negative connection portion. Along a direction opposite to the first direction, the fourth end protrudes from the battery assembly located at the first end and is electrically connected to the circuit board assembly.

7. The backup battery unit according to claim 1, characterized in that, Along the first direction, the battery bracket includes a first frame and a second frame disposed opposite to each other. The first frame is provided with a first limiting groove on the side facing away from the second frame, and the first limiting groove is provided with the positive electrode busbar. The second frame is provided with a second limiting groove on the side facing away from the first frame, and the second limiting groove is provided with the negative electrode busbar. The first limiting groove and / or the second limiting groove are provided with the heat insulation sheet.

8. The backup battery unit according to claim 1, characterized in that, Along the first direction, the battery bracket includes a first frame and a second frame disposed opposite to each other; The first frame is provided with a first latching part and a first insertion part, and the second frame is provided with a second latching part and a second insertion part. Along the first direction, the first latching part of one battery bracket is latched with the second latching part of another battery bracket, and the first insertion part of one battery bracket is inserted with the second insertion part of another battery bracket; and / or The first frame has a first connecting column, a second connecting column, and a first mounting hole. The second frame has a third connecting column, a fourth connecting column, and a second mounting hole. Along the first direction, the first connecting column includes a fifth end and a sixth end that are arranged opposite to each other. The second connecting column includes a seventh end and an eighth end that are arranged opposite to each other. The third connecting column includes a ninth end and a tenth end that are arranged opposite to each other. The fourth connecting column includes an eleventh end and a twelfth end that are arranged opposite to each other. The fifth end and the seventh end are connected to the first frame. The ninth end and the eleventh end are connected to the second frame. The sixth end has a third latching part. The tenth end has a fourth latching part. The eighth end has a third insertion part. The twelfth end has a fourth insertion part. Along the first direction, the third latching part is latched onto the fourth latching part. The third insertion part is inserted into the fourth insertion part. The positive electrode is located in the first mounting hole, and the negative electrode is located in the second mounting hole.

9. The backup battery unit according to any one of claims 5-8, characterized in that, The battery assembly includes a positive electrode connector. Along the first direction, the positive electrode connector is disposed between the positive electrode of the battery and the positive electrode busbar. The positive electrode connector includes a first main body portion and a first elastic connection portion connected to each other. The number of first elastic connection portions is the same as the number of cylindrical cells in the battery assembly and they are arranged in a one-to-one correspondence. Along the direction opposite to the first direction, the positive electrode of one cylindrical cell abuts against one of the first elastic connection portions, and the first main body portion abuts against the positive electrode busbar. The first elastic connection portion undergoes elastic deformation relative to the first main body portion in a direction away from the positive electrode to generate an elastic force acting on the positive electrode; and / or The battery assembly includes a negative electrode connector. Along the first direction, the negative electrode connector is disposed between the negative electrode of the battery and the negative electrode busbar. The negative electrode connector includes a second main body portion and a second elastic connecting portion connected to each other. The number of the second elastic connecting portions is the same as the number of cylindrical cells in the battery assembly and they are arranged in a one-to-one correspondence. Along the first direction, the negative electrode of one cylindrical cell abuts against one of the second elastic connecting portions, and the second main body portion abuts against the negative electrode busbar. The second elastic connecting portion undergoes elastic deformation relative to the second main body portion in a direction away from the negative electrode to generate an elastic force acting on the negative electrode.

10. An electrical appliance, characterized in that, Includes the backup battery unit as described in any one of claims 1-9.

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