CN111755640A

CN111755640A - Battery pack and method for manufacturing battery pack

Info

Publication number: CN111755640A
Application number: CN202010435033.4A
Authority: CN
Inventors: 胡宗波; 王志成; 陈涛; 郑礼英
Original assignee: Shenzhen City Weihuafeng Electronic Technology Co ltd
Current assignee: Shenzhen City Weihuafeng Electronic Technology Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-10-09

Abstract

A battery box group for an uninterruptible power supply, the battery box group comprises battery boxes, the battery boxes are approximately cuboids, the battery boxes comprise positive electrode faces and negative electrode faces which are arranged opposite to the positive electrode faces, the number of the battery boxes is four, the four battery boxes are mutually adjacently arranged to form two rows and two lines, each battery box and the positive electrode faces and the negative electrode faces of the adjacent battery boxes are oppositely arranged in a reversed mode, metal belts are welded on the positive electrode faces and the negative electrode faces of the battery boxes, each metal belt is provided with a residual part which is externally hung on the battery box, the external hanging directions of the residual parts of the metal belts on the positive electrode faces and the negative electrode faces on the same battery box face in an opposite direction, the residual parts of the metal belts of the battery boxes on the same row are mutually oppositely arranged and are overlapped and welded and connected after being bent, the residual parts of the metal belts of the two battery boxes on one row are welded and connected, the remaining portions of the metal strips of the two battery cartridges in the other row are bent.

Description

Battery pack and method for manufacturing battery pack

Technical Field

The invention relates to a battery box group for an uninterruptible power supply and a manufacturing method of the battery box group.

Background

The present domestic uninterruptible power supply (i.e. UPS) is a system apparatus in which a storage battery (mostly a lead-acid maintenance-free storage battery) is connected to a host, and dc power is converted into commercial power by a module circuit such as a host inverter. The UPS power box is a box body for placing the UPS, and is mainly used for providing stable and uninterrupted power supply for a single computer, a computer network system or other power electronic equipment such as an electromagnetic valve, a pressure transmitter and the like.

In the prior art, the power box using a plurality of battery box groups in the existing UPS power box structure usually needs to design a plurality of series circuits corresponding to a plurality of battery groups, the wiring and the connection are all complex, the mass production is not suitable, and the wire used in the power box is easy to age, so that the accident potential is caused.

Disclosure of Invention

In view of the above, the present invention provides a battery pack and a method for manufacturing the battery pack, which can solve the above problems or at least solve the above problems to some extent.

A battery box group for an uninterruptible power supply, the battery box group comprises battery boxes which are approximately cuboid, wherein each battery box comprises a positive electrode face and a negative electrode face which is arranged opposite to the positive electrode face, the number of the battery boxes is four, the four battery boxes are mutually adjacently arranged to form two rows and two lines, each battery box and the positive electrode face and the negative electrode face of the adjacent battery box on the row or the column are oppositely arranged in an upside-down mode, metal belts are welded on the positive electrode face and the negative electrode face of each battery box, each metal belt is provided with a residual part which is externally suspended on the battery boxes, the external suspension directions of the residual parts of the metal belts on the positive electrode face and the negative electrode face on the same battery box respectively face opposite directions, the residual parts of the metal belts of the battery boxes on the same row are mutually oppositely arranged and can be overlapped and electrically connected after being bent, and the residual parts of the metal belts of the two battery boxes on one column are welded and connected with the, the remaining portions of the metal strips of the two battery cartridges in the other row are bent.

Further, the battery box also comprises a plurality of battery units.

Further, a groove is arranged in the middle of the metal strip.

A method for manufacturing a battery pack for an uninterruptible power supply, wherein the battery pack comprises a battery case, the battery case is approximately rectangular, the battery case comprises a positive electrode face and a negative electrode face opposite to the positive electrode face, the number of the battery cases is four, the four battery cases are mutually adjacently arranged to form two rows and two lines, each battery case is oppositely and inversely arranged with the positive electrode face and the negative electrode face of the adjacent battery case in the row or the column, metal bands are welded on the positive electrode face and the negative electrode face of each battery case, each metal band is provided with a residual part externally suspended on the battery case, the external suspension directions of the residual parts of the metal bands on the positive electrode face and the negative electrode face on the same battery case respectively face in opposite directions, the residual parts of the metal bands of the battery cases on the same row are mutually oppositely arranged and can be overlapped and conductively connected after being bent, the residual parts of the metal bands of the two battery cases on one row are welded and connected with the same metal sheet after being bent, the remaining portions of the metal strips of the two battery cartridges in the other row are bent.

Drawings

FIG. 1 illustrates an exploded view of a power box for an Uninterruptible Power Supply (UPS);

FIG. 2 shows a perspective view of a power supply box portion of the power supply box according to FIG. 1;

FIG. 3 shows another perspective view of the power supply box portion of the power supply box according to FIG. 1;

FIG. 4 shows a perspective view of the body portion of the power supply box according to FIG. 1;

FIG. 5 shows another exploded view of the power supply box according to FIG. 1, with some connecting wires and interfaces removed to show the internal structure of the power supply box;

FIG. 6 shows an exploded view of the battery pack portion of the power supply box according to FIG. 1;

FIG. 7 illustrates an exploded view of a battery cartridge pack portion of the battery pack of FIG. 6;

fig. 8 illustrates a perspective view of a battery pack portion of the battery pack of fig. 6;

FIG. 9 illustrates another perspective view of the battery pack portion of the battery pack of FIG. 6;

fig. 10 shows an exploded view of a cartridge portion of the battery cartridge pack of fig. 7 with some of the battery cells removed to show the internal structure of the cartridge;

FIG. 11 shows an exploded view of the cell portion of the battery cartridge of FIG. 6;

FIG. 12 shows a perspective view of a cell portion of the battery cartridge of FIG. 6;

FIG. 13 shows an exploded view of the power box handle of the power box of FIG. 1;

FIG. 14 illustrates a cross-sectional view of the power box handle of FIG. 13 with the handle body in an upright position relative to the handle base;

fig. 15 shows a cross-sectional view of the power pack handle of fig. 13 with the handle body horizontal relative to the handle base.

Detailed Description

Fig. 1 shows an exploded view of a power supply box 10 for an Uninterruptible Power Supply (UPS), the power supply box 10 for the UPS including a UPS power supply box 100, the power supply box 100 including a battery pack 200 disposed within the UPS power supply box 100. The power box 10 for a UPS further includes a power box handle 300.

As shown in fig. 1 and 2, the power supply case 100 is substantially rectangular parallelepiped, the power supply case 100 includes a front panel 101 having a substantially rectangular plate shape, a rear panel 103 also having a substantially rectangular plate shape, a battery pack 200, and a case main body 102 having a substantially through-going rectangular cylinder shape, the battery pack 200 is fixedly attached to the case main body 102, and the front panel 101 and the rear panel 103 are respectively fixedly attached to the case main body 102 from both open sides of the case main body 102 so as to surround the battery pack 200 together with the case main body 102.

As shown in fig. 4 and 5, in the present embodiment, two sides of the box body 102 are open, a plurality of connection pieces 1023 are disposed on the inner side wall of the box body 102, the connection pieces 1023 are hollow strip-shaped protrusions formed on the inner side wall of the box body 102, and in the present embodiment, one side of the connection pieces 1023 is partially open, so that the hollow parts of the connection pieces 1023 are communicated with the outside. One end of the connector 1023 is located at the edge of the open side of the inner side wall of the box body 102 toward the front panel 101, the connector 1023 extends in the direction of penetration of the square-tube-shaped box body 102, and the other end of the connector 1023 is located at the edge of the open side of the inner side wall of the box body 102 toward the rear panel 103. The front panel 101 includes a front outer panel 110 and a front inner panel 111, and the front inner panel 111 is provided with a plurality of front inner panel through-holes 1110 located near the circumferential edge of the front inner panel 111. The rear panel 103 includes a rear outer panel 130 and a rear inner panel 131, and the rear inner panel 131 is provided with a plurality of rear inner panel through-holes 1310 located near a circumferential edge of the rear inner panel 131. The front inner plate through-hole 1110 and the rear inner plate through-hole 1310 correspond to the plurality of connectors 1023, respectively, in position, so that the front inner plate 111 and the rear inner plate 131 can be mounted to both sides of the cabinet body 102, respectively, by the panel mounting screws 1010, wherein both ends of each connector 1023 are aligned with a corresponding front inner plate through-hole 1110 and a corresponding rear inner plate through-hole 1310, respectively, and the mounting screws 1010 pass through the front inner plate through-hole 1110 and the rear inner plate through-hole 1310, respectively, from both sides and form a threaded connection with both ends of the same connector 1023. In this embodiment, the connection piece 1023 is a hollow strip-shaped protrusion, the mounting screw 1010 is a self-tapping screw, the mounting screw 1010 can be directly screwed into the hollow part of the connection piece 1023 to form a threaded connection, and in another embodiment, both ends of the connection piece 1023 can also be provided with internal threads corresponding to the mounting screw 1010. The front outer panel 110 is fixedly attached to the front inner panel 111 by means of gluing or the like, and similarly, the rear outer panel 130 is fixedly attached to the rear inner panel 131 by means of gluing or the like.

The battery pack 200 is mounted to a mounting bottom surface 1027 inside the casing main body 102 by screwing or the like. The power box handle 300 is installed at the upper side of the power box 10. After the front panel 101 and the rear panel 103 are fixed to the case body 102, since the connection members 1023 are formed on the inner side wall of the case body 102 and the connection members 1023 extend in the direction of penetration of the case body 102, so that the connection members 1023 also serve as reinforcing ribs of the case body 102, when the user lifts up the power supply case 10, the connection members 1023 reduce deformation of the case body 102 caused by the gravity of the battery pack 200, and the load-bearing capacity of the power supply case 10 is enhanced. In addition, since the box body 102 described above is a substantially cylindrical structure with a constant cross section, the box body 102 can be produced by extrusion molding or the like, and the produced product is stable and cheap, and has high economic value. In addition, the case body 102 suitable for power supply boxes of different specifications can be conveniently obtained by setting the case body 102 to different lengths along the penetrating direction in the production process of extrusion molding and the like, and the power supply boxes of different specifications can be formed by increasing or decreasing the number of the battery packs 200, so that different use requirements can be met.

The front panel 101 has a front surface facing the outside of the power supply box 10. Be provided with a plurality of functional unit and interface on the front panel 101, specifically include: a lamp 1012 arranged substantially right and left centrally with respect to the front face of the front panel 101 at a position near the top end of the front panel front face; a screen 1013 also arranged substantially centered left-right directly below the lamp 1012; a row of control keys arranged below the screen 1013, the row of control keys being 4 in total, and the control keys are an ac key 1019, a USB key 1020, a lamp key 1021, and a dc key 1022 in sequence from left to right; two Alternating Current (AC)110V output interfaces 1011 arranged in a vertical row at the left side of the front face of the front panel; two 2.4 amp USB-a interfaces 1018 disposed at the bottom end of the front panel 101; two 2 amp USB-a interfaces 1017 also disposed at the bottom end of the front panel 101 and evenly spaced from the 2.4 amp USB-a interface 1018 on the right side thereof; a Type-C interface 1016 arranged side-by-side to the right of the 2 amp USB-A interface 1017; a dc input interface 1015 arranged side-by-side to the right of the Type-C interface 1016; and a dc output interface 1014, disposed on the right side of the front panel front face, available for 12 volt 10 amp dc output.

As shown in fig. 1, the power supply box 100 further includes a connection line and an interface 109, the functional components and the interface disposed on the front panel 101 are electrically connected to the battery pack 200 through the connection line and the interface 109, and the battery pack is further provided with a control module and a power conversion module (not shown), so that the battery pack 200 can respectively supply power, control or receive signals from the functional components and the interface according to different power supply needs of the functional components and the interface. For example, in the present embodiment, specifically: the lamp 1012 is an LED lamp, and the change of color and the turning on and off of the lamp are controlled by a control module in the battery pack 200, so that the lamp 1012 can simply and quickly display information such as the on-off state and electric quantity warning of the power supply box 10; the screen 1013 is preferably an LCD screen, the screen 1013 receives and displays information from the control module, and a user can specifically know the current working state of the power supply box 10, such as specific remaining power, charging state, current working mode, etc., and perform corresponding operations through the information on the screen 1013 while obtaining information feedback; the AC key 1019, the USB key 1020, the lamp key 1021 and the DC key 1022 are respectively electrically connected with the control module and can send signals to the control module when being triggered, so that the AC key 1019 can be pressed to open or cut off the current output of the AC 110V output interface 1011, the USB key 1020, the lamp key 1021 and the DC key 1022 are also electrically connected with the control module through similar arrangement, so that the USB interface can be pressed to control the current output of the 2.4 ampere USB-A interface 1018, the 2 ampere USB-A interface 1017 and the Type-C interface 1016, and the lamp key 1021 can be pressed to control the switch of the lamp 1012 and the DC key 1022 can be pressed to control the current output of the DC output interface 1014; an Alternating Current (AC)110V output interface 1011, a 2.4 amp USB-a interface 1018, a 2 amp USB-a interface 1017, a Type-C interface 1016, and a dc output interface 1014 are all electrically coupled with the battery pack 200 and controlled by the control module to provide power supply according to user's settings, and which provide a variety of interface forms and power output specifications to meet different kinds of needs; the dc input interface 1015 may be connected to a 19 v dc power source to charge the battery pack 200.

As shown in fig. 1 and 3, the rear panel 103 has a substantially rectangular plate shape, and a surface of the rear panel 103 facing the outside of the power box 10 is an outer surface 1030, and a surface of the rear panel 103 facing the inside of the power box is an inner surface 1031. A fan 1034 is arranged on the inner side surface 1030, a change-over switch 1032 is arranged on the outer side surface 1030, the fan 1034 and the change-over switch 1032 are both electrically connected with the battery pack 200, the fan 1034 can be turned on when the power box 10 works to cool the power box 10, external air enters the power box 10 from a rear air inlet 1035 arranged on the rear panel 103 and a bottom air inlet 1029 arranged at the bottom of the box body 102 to be cooled, and the cooled and heated air is discharged out of the power box 10 through an air outlet 1035 arranged on the rear panel 103 and in a position corresponding to the installation position of the fan 1034. The switch 1032 is electrically connected to the battery pack 200, and the frequency of the output power of the power box 10 can be switched by switching the switch 1032, which can be switched between 50 hz and 60 hz in this embodiment, so that different power utilization standards can be satisfied. In addition, the bottom of the box body 102 is also fixedly provided with a plurality of uniformly distributed substantially cylindrical foot pads 1028, and the foot pads 1028 are made of an elastic material, in this embodiment, silica gel, which can provide good buffering for the power supply box when placed, and has good insulation and anti-slip properties.

As shown in fig. 6, the battery pack 200 includes a battery pack group 220, a battery fan 282 fixedly coupled to a side of the battery pack group, a converter plate 281 fixedly coupled to an upper side of the battery pack group 220, and a fuse plate 283 fixedly coupled to the other side of the battery pack group 220. The battery fan 282, the battery pack 220, and the fuse board 2283 are electrically connected to the converter board 281, wherein the battery pack 220 provides power to the power box 10 during operation, the fuse board 2283 is electrically connected to the battery pack 220 for overload protection, and the battery fan 282 further provides cooling for the power box 10.

Fig. 7 to 9 exemplarily show a specific structure of the battery pack 220, and a method of manufacturing the battery pack 220 will be described below with reference to the drawings. In the present embodiment, the battery pack group 220 includes four battery cartridges 221 (respectively expressed as a battery cartridge 221A, a battery cartridge 221B, a battery cartridge 221C, and a battery cartridge 221D). The battery case 221 is a substantially rectangular parallelepiped, which includes a plurality of battery cells 290 uniformly arranged in a row and fixed with respect to each other, the battery cell 290 has a positive electrode on an upper surface and a negative electrode disposed on a lower surface of the battery cell opposite to the positive electrode, the positive electrodes of the plurality of battery cells 290 constitute a positive electrode face 2211 of the battery case 221, the negative electrode faces of the plurality of battery cells 290 constitute a negative electrode face 2212 of the battery case 221, the four battery cases are arranged in a 2-by-2 array, wherein each of the cartridges is arranged upside down with respect to the positive electrode face 2211 and the negative electrode face 2212 of the adjacent two cartridges in the lateral and longitudinal directions, so that the positive electrode faces 2211 of the two battery cases adjacent in the lateral and longitudinal directions are adjacent to the negative electrode faces 2212 of the other one respectively, in the arrangement of the present embodiment, the positive electrode faces 2211 of the two

batteries

221A and 221C arranged diagonally are flush with the negative electrode faces 2212 of the

batteries

221B and 221D also arranged diagonally. The battery boxes 221 are connected in series by

nickel strap sets

222, 223, 228, specifically: the nickel band set 222 is substantially in the shape of a rectangular band, and a plurality of long through-hole-shaped grooves are formed in the middle thereof to prevent the nickel band set from being damaged by stress generated by welding, and one nickel band set 222 may be fixedly welded to the positive electrode surface 2211 or the negative electrode surface 2212 of one battery case 221 by spot welding or the like. In the process of mounting the battery box according to the present embodiment, two nickel strip sets 222 are welded to the positive electrode face 2211 of the battery box 221A and the negative electrode face 2212 of the battery box 221B, respectively, the nickel strip sets 222 are ensured to be welded to the positive electrode/negative electrode of each battery unit 290, and the nickel strip sets 222 have a remaining connecting section 2221 after welding, and the connecting section 2221 is configured to be suspended from the positive electrode face 2211 or the negative electrode face 2212 after welding; similarly, the nickel strap sets 228 are substantially rectangular strap-shaped, two nickel strap sets 228 are respectively welded to the positive electrode face 2211 of the battery box 221B and the negative electrode face 2212 of the battery box 221D, and the nickel strap sets 228 are provided with the remaining terminal segments 2281 overhanging the positive electrode face 2211 or the negative electrode face 2212; similarly, the nickel strap groups 223 are substantially rectangular strap-shaped, four nickel strap groups 223 are respectively welded to the negative electrode face 2212 of the battery box 221A, the positive electrode face 2211 of the battery box 221B, the negative electrode face 2212 of the battery box 221C and the positive electrode face 2211 of the battery box 221D, after welding, the nickel strap groups 223 include the remaining intermediate sections 2231, the intermediate sections 2231 are suspended from the positive electrode face 2211 or the negative electrode face 2212, and the direction of the overhang of the intermediate sections 2231 is opposite to the direction of the overhang of the connecting section 2221 of another nickel strap group 222 on the battery box 221 or the terminal section 2281 of the nickel strap group 228, and then the intermediate sections 2231 are bent by 90 degrees in a direction away from the battery box 221.

Then, the four battery boxes 221 after the welding are arranged in a 2-by-2 array into a bottom case 225 having a rectangular parallelepiped shell shape with one side being open, wherein the

battery boxes

221A and 221C are arranged in an oblique position, the

battery boxes

221B and 221D are arranged in an oblique position, the surfaces of the four battery boxes 221 to which the nickel ribbon sets 222 and the nickel ribbon sets 228 are welded face the open side of the bottom case 225, the overhang directions of the two connecting sections 2221 are the same, the overhang directions of the two terminal sections 2281 are the same, the overhang directions of the two connecting sections 2221 and the two terminal sections 2281 are opposite, and the connecting sections 2221 and the terminal sections 2281 are both outwardly suspended outside the bottom case 225 in a direction away from the four battery boxes 221, as a result, the intermediate sections 1 of the four nickel ribbon sets 223 are arranged opposite to each other, and when the four battery boxes 221 are placed into the bottom case 225, the four intermediate sections 2231 can respectively protrude out of the bottom case 225 through four through the rectangular holes 2251 formed at the bottom of the bottom case 225, after the bottom case is extended, two pairs of the four intermediate sections 2231 arranged opposite to each other are overlapped and bent to be close to the bottom outer surface of the bottom case. Further, a substantially rectangular plate-shaped face case 224 is provided on the upper side of the bottom case 225, and the face case 224 is fixedly connected to the bottom case 225 by screws 2244 so as to surround the four battery pack groups 221 together with the bottom case 225. Two connecting ports 2241 are disposed on two opposite edges of the face housing 224, and after the face housing 224 is mounted to the bottom housing 225, the two connecting sections 2221 and the two terminal sections 2281 are respectively adapted to protrude out of the corresponding connecting ports 2241, wherein the connecting sections 2221 are bent upward and further bent toward the face housing 224 to be close to the upper surface of the face housing 224, and the terminal sections 2281 are bent upward by 90 degrees. Thereafter, one nickel plate 227 is disposed on the upper surface of the front case 224, the nickel plate 227 is overlapped with both of the connecting sections 2221, and the overlapped portions of the nickel plate 227 and the two connecting sections 2221 are welded, respectively, thereby electrically connecting the positive electrode surface 2211 of the battery case 221A and the negative electrode surface 2212 of the battery case 221B via the nickel plate 227 and the two nickel plate groups 222, and then welding the two groups of intermediate sections 2231, respectively, thereby electrically connecting the negative electrode surface 2212 of the battery case 221A and the positive electrode surface 2211 of the battery case 221D, the positive electrode surface 2211 of the battery case 221B, and the negative electrode surface 2212 of the battery case 221C, respectively. In the present embodiment, it is also preferable to cover the exposed nickel plate 227, the trunk 2231, and the trunk 2231 with an insulating material sheet by adhesion or the like to perform an insulating process.

Thus, the battery pack 220 is mounted, and the four

battery cartridges

221A, 221B, 221C, and 221D are connected in series, and the positive and negative electrodes can be connected by two protruding terminal sections 2281, respectively. The manufacturing method of the battery box group only uses the nickel strips for welding, has simple procedure and high reliability, and can increase and decrease the battery capacity of the power box by simply adjusting the number of the battery boxes connected in series, thereby conveniently meeting richer user requirements.

Fig. 10 shows an exploded view of the battery compartment 220. The battery case 220 includes a plurality of battery cells 290 having a substantially rectangular sheet shape, a first case 2213, and a second case 2214, and the first case 2213 and the second case 2214 are preferably made of an insulating material having a certain elasticity, such as resin. The first housing 2213 generally includes 2 substantially rectangular plate-shaped vertical side plates 22131 and a cooling side plate 22132, the cooling side plate 22132 is generally rectangular plate-shaped, the cooling side plate 22132 is connected to the same side of the 2 vertical side plates 22131 and perpendicular to the two vertical side plates 22131, the second housing 2214 generally includes 2 substantially rectangular plate-shaped vertical plates 22141 and a cooling plate 22142, the cooling plate 22142 is generally rectangular plate-shaped, the cooling side plate 22412 is connected to the same side of the 2 vertical plates 22141 and perpendicular to the two vertical plates 22141, the end of the vertical side plate 22132 of the first housing 2213 opposite to the cooling side plate 22131 is formed with a buckle 2216, and the end of the vertical plate 22141 of the second housing 2214 opposite to the cooling plate 22142 is formed with a buckle 2217. The first and

second housings

2213 and 2214 can be snapped together with the snap 2216 opposite the snap 2217 and the snap 2216 adapted to snap into the snap 2217, the first and

second housings

2213 and 2214 thereby completing the connection and adapted to enclose the plurality of battery cells 290 inside of each. The cooling side plate 22131 and the cooling plate 22141 are provided with a plurality of blocking blocks 2215 uniformly spaced on the sides facing the battery cells 290, and in this embodiment, the blocking blocks 2215 are formed in two rows on the cooling side plate 22131 and the cooling plate 22141 in the battery arrangement direction. The blocking stopper 2215 has a substantially triangular plate shape with a side facing the side of the battery cell 290, guide ribs 2219 perpendicular to the blocking stopper 2215 are provided on both sides of the blocking stopper 2215, the guide ribs 2219 have a substantially triangular plate shape, and the oblique side of the guide rib 2219 forms an angle with the side of the blocking stopper 2215, the angle being suitable for contacting the battery cell 290 when the battery cell 290 is put into the first and

second cases

2213 and 2214 and guiding the battery cell 290 into the mounting position. By setting the angle of the oblique sides of the guide ribs 2219, the distance between the blocking blocks 2215, and the height of the

vertical side plates

22132 and 22142, the battery unit 290 is supported by the guide ribs 2219 of the blocking blocks 2215 of the first and

second housings

2213 and 2214 after the battery unit is placed in the first and

second housings

2213 and 2214 and the first and

second housings

2213 and 2214 are fastened, so that the battery unit is reliably fixed. The cooling side plate 22131 and the cooling plate 22141 are further provided with a plurality of through cooling slots 2218 for better air circulation of the battery units 290, and preferably, the positions of the cooling slots 2218 are respectively arranged between two rows of internal blocking blocks 2215, so that the cooling slots 2218 and the two blocking blocks 2215 in the same row are in the same straight line, the cooling slots 2218 are opposite to the gap position between the two battery units 290, and the positions of the cooling slots 2218 on the upper side and the lower side are in one-to-one correspondence, thereby providing better air circulation for the battery box 221. With the battery cartridge of the present embodiment, the battery cells 290 can be conveniently mounted and spaced apart from each other, and the cooling air can be efficiently supplied to the battery cells through the cooling grooves 2218, greatly reducing the temperature accumulation.

Fig. 11 shows an exploded view of battery unit 290. The battery unit 290 includes a battery connecting portion 29, a battery body 291 having a substantially rectangular sheet shape, and a negative electrode plate 296 disposed on a lower side of the battery body, and the battery connecting portion 29 includes a first connecting band 292 disposed on an upper side of the battery body 291, a protective plate 293 disposed on an upper side of the first connecting band 292, a second connecting band 294 and a positive electrode plate 295 disposed on upper sides of the protective plate 293, respectively. Here, the battery body 291 includes a positive electrode 2911 disposed at an upper side of the battery body 291 and a negative electrode (not shown) disposed at a lower side of the battery body 291, and the first connection band 292, the second connection band 294, the positive electrode plate 294, and the negative electrode plate 296 are made of a conductive material, in this embodiment, an aluminum-nickel composite band.

The first connecting strip 292 is generally in the form of an "L" shaped sheet in its flattened state, and includes two rectangular sheet portions, a first sheet portion 2922 and a second sheet portion 2923, perpendicular to each other, wherein the first sheet portion 2922 is adapted to be folded toward the second sheet portion 2923 to form a connecting end 2921 (see fig. 12), and the second sheet portion 2923 is welded to the cell positive electrode 2911 by spot welding or the like. The protection plate 293 is a rectangular sheet-shaped PCB, and the first connection portion 2931, a Positive Temperature Coefficient (PTC) element, and the second connection portion 2932 are sequentially arranged on the upper surface of the protection plate 293 along the length direction, wherein the first connection portion 2931, the Positive Temperature Coefficient (PTC) element, and the second connection portion 2932 are sequentially connected in series through the PCB, the first connection portion 2932 faces the upper surface of the protection plate 293 and can be conductively connected, and the second connection portion 2932 also faces the upper surface of the protection plate 293 and can be conductively connected. The protective plate 293 is provided on the upper side of the first connecting band 292 to partially overlap the first connecting band 292, and preferably, the protective plate 293 completely covers the first connecting band 292 except for the first sheet portion 2922, and the protective plate 293 is fixedly connected to the second sheet portion 2923 and the upper side of the battery body 291 by means of adhesion or the like. The first sheet part 2922 is folded in the direction of the second sheet part 2923 and forms a connection end 2921, and the connection end 2921 covers the first connection portion 2931 of the protection plate 293. The connection terminal 2921 is electrically connected to the first connection terminal 2931 by spot welding or the like, the second connection strip 294 is provided above the connection terminal 2921 and electrically connected again by spot welding or the like, and the positive electrode plate 294 is provided above the second connection terminal 2932 of the protective plate 293 and electrically connected by spot welding or the like in the same manner. A negative electrode plate 296 is provided on the lower side of the battery body 291, and the negative electrode plate 296 is electrically connected to the negative electrode of the battery body 291 by spot welding or the like.

As shown in fig. 11 in conjunction with fig. 12, in the present embodiment, the protection plate 293 of the battery cell 290 includes a Positive Temperature Coefficient (PTC) element 2933, the PTC element 2933 connects the positive plate 295 in series with the connection terminal 2921 through the protection plate 293 to connect the positive plate 295 in series to the positive electrode 2911 of the battery body, and the PTC element 2933 provides overload protection for the battery. The battery unit 290 has a simple structure, and the components are stacked in the same direction, thereby providing great convenience for production and assembly and being well suited for automated production.

In practical applications, the battery body 291 may also be existing, and in this case, the battery connecting portion 29 may be prepared in advance, and specifically, the first connecting strip 292, the protective plate 293, the second connecting strip 294 and the positive electrode plate 295 may be mounted in the above-described manner, without folding the first sheet portion 2922 of the first connecting strip 292 and without adhering the protective plate 293 to the second sheet portion 2923. When the battery connecting portion 29 is combined with the battery body 291, the second sheet portion 2923 is electrically connected to the positive electrode 2911 of the battery body 291 by spot welding or the like, the protective plate 293 is attached to the second sheet portion 2923, and the first sheet portion 2922 is folded, and the negative electrode plate 296 is attached to the negative electrode of the battery body 291 to complete the assembly of the battery cell. Therefore, the production or purchase of the battery body can be performed independently of the production of the battery connecting part, and the production flexibility and the overall efficiency are improved. Meanwhile, since the second connection band of the battery connection part 29 is in the shape of a sheet, it can be mounted to the positive electrodes of various types of batteries by spot welding, etc., and thus has high compatibility.

Fig. 13 shows an exploded view of the power box handle 300, the power box handle 300 including an elongated handle body 31 having a curvature, and a handle seat 36 for securing the handle body 31 to the power box body 100. The handle body 31 is symmetrical left and right and has a curvature, specifically, two end portions 311 thereof are gradually bent in the same direction and finally are perpendicular to the handle body direction, and the two end portions 311 are respectively provided with a bolt hole 311 which transversely penetrates through. The handle holder 36 is substantially rectangular, and has a slot 361 formed on one side thereof and penetrating the other opposite side thereof, the slot 361 is adapted to receive the end 311 of the handle body 31, and both side walls of the slot 361 are provided with a through bolt through hole 363, the bolt through hole 363 is aligned with the bolt hole 311, the diameter of the bolt through hole 363 is larger than the diameter of the bolt hole 311, the bolt 35 is adapted to be transversely inserted into the bolt through hole 363 from one side of the handle holder 36 and then penetrate the bolt hole 311, and finally protrude from the other side of the handle holder 36, the diameter of at least a portion of the bolt 311 is slightly larger than the diameter of the bolt hole 311 to form a tight fit with the bolt hole 311, and preferably, the slightly larger portion is formed in a shape of a knurl. The bottom surface of the notch 361 is further provided with a through mounting hole 365, the outer hexagonal screw 34 is partially adapted to pass through the mounting hole 365, the upper side of the mounting hole 365 further comprises a positioning counter bore 362, and the positioning counter bore 362 is adapted to be matched with the head 341 of the outer hexagonal screw 34 in a shape. The upper side of the head 341 of the outer hexagonal screw 34 is provided with a spring counterbore 342, the spring 33 is adapted to be disposed within the counterbore 342, and in addition, the positioning ball 32 is adapted to be disposed on the spring 33 and supported by the spring 33, and the positioning ball 32 is also adapted to be received within the spring counterbore 342. A nut 37 adapted to fasten the alien screw 34 is also provided below the handle holder 36.

Fig. 14 and 15 show cross-sectional views when viewed perpendicularly to the extending direction of the handle body 31, in which positional relationships among the respective parts at the handle seat 36 are shown. The section part of the end part 311 of the handle body 31 is arc-shaped, the top end of the arc-shaped part of the end part 311 is provided with a concave ball groove 314, when the handle body 31 is vertical relative to the handle seat 36, the position of the ball groove 314 is aligned with the positioning ball 32, the spring 33 pushes the positioning ball 32 to be clamped into the ball groove 314, so that the angle of the handle body 31 relative to the handle seat 36 is quickly fixed, and the quick fixation can be released simply by rotating the handle body 31 to slide the positioning ball 32 out of the ball groove 314. In addition, the side surface of the circular arc-shaped portion of the end portion 311 is further provided with a recessed positioning groove 313, when the handle body 31 is rotated relative to the handle seat 36 until the position of the positioning groove 313 is aligned with the positioning bead 32, the handle body 31 is in a horizontal state relative to the handle seat 36, and the spring 33 pushes the positioning bead 32 to be clamped into the positioning groove 313, so that the angle of the handle body 31 relative to the handle seat 36 is fixed.

The power box handle of the embodiment can quickly realize the function of angle fixation, obviously enhances the containing performance of the power box, and also improves the portability of the power box.

The power box is simple in structure and good in heat dissipation performance, and the assembling process is particularly suitable for automatic production. And the power box has multiple functions and can be suitable for wide application occasions.

The present invention is not limited to the embodiments described herein, but may be modified or changed without departing from the scope of the present invention.

Claims

1. A battery box group for uninterrupted power source, battery box group includes the battery case, the battery case is roughly the cuboid, its characterized in that, the battery case include the anodal face and with the relative negative pole face that sets up of anodal face, battery case quantity is four, four battery cases adjacent arrangement each other form two lines, wherein every the battery case with its be in line or the adjacent battery case of going on the column anodal face with the negative pole face is arranged upside down relatively, wherein every the anodal face and the negative pole face of battery case all weld the strap, every the strap all have the overhang in the remainder of battery case is same on the battery case anodal face with on the negative pole face the overhang direction of the remainder of strap respectively towards opposite direction, on same go on the battery case the strap the remainder all arrange relatively each other and can be folded together and lead after being bent And electrically connecting, wherein the remaining portions of the metal strips of the two battery cartridges in one of the columns are bent and then welded to the same metal sheet, and the remaining portions of the metal strips of the two battery cartridges in the other one of the columns are bent.

2. The battery pack for an uninterruptible power supply according to claim 1, wherein the battery pack further includes a plurality of battery cells.

3. The battery pack for an uninterruptible power supply as claimed in claim 2, wherein the metal band is provided with a groove in the middle.

4. Method for manufacturing a battery pack for an uninterruptible power supply, the battery pack comprising battery cells, the battery cells being substantially cuboid, characterized in that the battery cells comprise a positive electrode face and a negative electrode face arranged opposite to the positive electrode face, the number of the battery cells being four, the four battery cells being arranged adjacent to each other to form two columns and two rows, wherein each of the battery cells is arranged upside down with respect to the positive electrode face and the negative electrode face of the battery cell adjacent to each other in a row or column, wherein metal strips are welded to the positive electrode face and the negative electrode face of each of the battery cells, each of the metal strips having a remaining portion overhanging the battery cell, the same being the same on the battery cell the positive electrode face and on the negative electrode face respectively facing opposite directions, the same being the same on the row the remaining portion of the metal strip being arranged opposite to each other and capable of being folded over And are conductively connected, the remaining portions of the metal strips of the two battery cartridges in one of the columns are bent and then welded to the same metal sheet, and the remaining portions of the metal strips of the two battery cartridges in the other one of the columns are bent.