JP5934754B2 - An assembled battery constructed by connecting a plurality of secondary batteries in parallel by two conductive strips - Google Patents

Description

  The present invention relates to a secondary battery, and more particularly, to a battery constructed by connecting a plurality of secondary batteries in parallel by two conductive strips.

  Please refer to FIG. FIG. 1 is a perspective view showing a structure of a conventional independent division type power battery unit. Such an independent division type power battery unit accommodates a plurality of secondary batteries 13 (for example, lithium ion batteries) by aligning some conductive strips 12 with the frame 11. Each secondary battery 13 is fastened to the conductive strip 12 via a security unit 14. Thus, each secondary battery 13 has a security unit 14. The secondary batteries 13 are connected in parallel by the frame 11 and the conductive strip 12. By each security unit 14, the secondary battery 13 which fails is cut off independently, and it is possible to avoid interruption of electric power and occurrence of an accident. However, such an independently divided power battery unit has the following drawbacks.

  (1) Since the conductive strips 12 that connect the secondary batteries 13 in parallel are positioned on the side surface and the end surface of the secondary battery group, the space occupied by the side surface and the end surface of the secondary battery group increases.

  (2) The electrode heads 15, 16 are attached to the edge strip 111 at one end of the frame 11, and each electrode head 15, 16 is connected to the corresponding conductive strip 12 via the connection cable 17. If there is an error in the wiring, the whole is short-circuited, and after the wiring, the connection cable 17 may fall off. Also, the parallel connection path is too complicated.

  A main object of the present invention is to provide an assembled battery that can reduce the space occupied by the side surface and the end surface of a secondary battery group by providing two conductive strips on the same side of the secondary battery group. There is.

  A second object of the present invention is to form a conductive portion by integrally forming a conductive portion for connecting a plurality of secondary batteries in parallel and an electrode head portion serving as a power output end on the two conductive strips. No wiring is required between the electrode head and the electrode head, and it is possible to eliminate a short circuit due to wiring work and dropping of the connection cable. In addition, a parallel connection path is simplified.

According to the assembled battery of the present invention, a plurality of secondary batteries are configured to be connected in parallel by two conductive strips, and a plurality of secondary batteries having a rod shape having a circular cross section are arranged to face in the same direction. Each secondary battery has a rod body, a positive end located at one end of the rod body, and a negative end located at the other end of the rod body, and each positive end is on the same positive end face Each negative electrode end is located on the same negative electrode end surface, and between the positive electrode end surface and the negative electrode end surface, the assembly side surface located on the side surface of the rod body of each secondary battery, and the rod body of the first secondary battery A secondary battery group having an assembly end surface that is located on the side surface and having a direction different from that of the assembly side surface, a first conductive portion provided on the assembly side surface, and the first conductive portion, A first electrode head portion located on the assembly end face, A lip, a second conductive portion provided on the side surface of the assembly, insulated from the first conductive portion, and formed integrally with the second conductive portion, located on the assembled end surface, and insulated from the first electrode head portion. A second conductive strip having a two-electrode head portion; a first conductive end portion electrically connected to the first conductive portion; and a second conductive end portion electrically connected to each positive electrode end. A plurality of conductive tools, a first conductive pin that is electrically connected to the second conductive portion, and a second conductive pin that is electrically connected to each negative electrode end, and a plurality of conductive tools provided on the assembly side surface A fuse,
It is characterized by including.

  According to the assembled battery of the present invention, the secondary battery group further includes a first side surface located on a side surface of the rod body of each secondary battery and facing the assembled side surface, and the first electrode of the first conductive strip. The head portion and the second electrode head portion of the second conductive strip are located between the assembled side surface and the first side surface.

  According to the battery assembly of the present invention, the battery case further includes a case, the case containing the secondary battery group, the first conductive strip, the second conductive strip, each conductive tool, and each fuse. The electrode head portion and the second electrode head portion protrude from the case and are exposed to the outside.

  According to the assembled battery of the present invention, the first conductive end portion of each conductive tool is fastened to the first conductive portion of the first conductive strip by screws, and the second conductive end portion of each conductive tool is connected to each secondary electrode. It is welded to the positive electrode end of the battery.

  According to the assembled battery of the present invention, the first conductive pin of each fuse is fastened to the second conductive portion of the second conductive strip by a screw, and the second conductive pin of each fuse is connected to the negative end of each secondary battery. It is welded to.

The assembled battery of the present invention has the following effects.
(1) By providing two conductive strips on the same side of the secondary battery group, it is possible to reduce the space occupied by the side surface and the end surface of the secondary battery group.

(2) The two conductive strips are integrally formed with a conductive portion for connecting a plurality of secondary batteries in parallel and an electrode head portion serving as a power output end, so that the conductive portion and the electrode head portion are It is possible to eliminate a short circuit and a disconnection of the connection cable due to wiring work without requiring any wiring. Also, the parallel connection path is simple.

It is a perspective view which shows the structure of the conventional independent division type power battery unit. It is a disassembled perspective view which shows a part of Example 1 of this invention. It is a perspective view which shows the assembled state of Example 1 of this invention. It is a front view which shows Example 1 of this invention. It is a side view which shows Example 1 of this invention. It is a top view which shows Example 1 of this invention. It is a figure which shows the electric circuit of Example 1 of this invention. It is a perspective view which shows Example 2 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Please refer to FIG. 2 to FIG. FIG. 1 is a perspective view showing the structure of a conventional independent division type power battery unit, FIG. 2 is an exploded perspective view showing a part of Embodiment 1 of the present invention, and FIG. 3 is Embodiment 1 of the present invention. FIG. 4 is a front view showing Example 1 of the present invention, FIG. 5 is a side view showing Example 1 of the present invention, and FIG. 6 is an example of the present invention. FIG. 7 is a diagram illustrating an electric circuit according to the first embodiment of the present invention.
The assembled battery according to the present embodiment includes a secondary battery group 20, a first conductive strip 30, a second conductive strip 40, a plurality of conductive tools 50, and a plurality of fuses 60.

The secondary battery group 20 is configured by arranging a plurality of secondary batteries 21 having a rod shape having a circular cross section so as to face in the same direction. Each secondary battery 21 has a rod main body 211, a positive electrode end 212 located at one end of the rod main body 211, and a negative electrode end 213 located at the other end of the rod main body 211. Each positive electrode end 212 is located on the same positive electrode end surface 22 as shown in FIGS. 4 and 6. As shown in FIGS. 4 and 6, each negative electrode end 213 is located on the same negative electrode end surface 23.
Between the positive electrode end surface 22 and the negative electrode end surface 23, as shown in FIGS. 5 and 6, the assembly side surface 24 positioned on the side surface of the rod body 211 of each secondary battery 21, and as shown in FIGS. 4 and 5. Furthermore, it has an assembly end surface 25 that is located on the side surface of the rod body 211 of the first secondary battery 21 </ b> A and whose direction is different from that of the assembly side surface 24.
In the present embodiment, as shown in FIGS. 5 and 6, the secondary battery group 20 is further positioned on the side surface of the rod body 211 of each secondary battery 21 and the first side surface 26 facing the assembly side surface 24. Have On the other hand, the rod bodies 211 of the secondary batteries 21 are arranged so as to contact each other.

The first conductive strip 30 includes a first conductive portion 31 provided on the assembly side surface 24, and a first electrode head portion 32 that is integrally formed with the first conductive portion 31 and located on the assembly end surface 25. .
In the present embodiment, the first electrode head portion 32 of the first conductive strip 30 is located between the assembly side surface 24 and the first side surface 26. On the other hand, the first conductive portion 31 further abuts on the surface of the rod body 211 of each secondary battery 21. The first electrode head part 32 is separated from the surface of the rod body 211 of the first secondary battery 21A and serves as a power output terminal of the assembled battery.

The second conductive strip 40 is provided on the assembly side surface 24, is formed integrally with the second conductive portion 41, which is insulated from the first conductive portion 31, and the second conductive portion 41, and is located on the assembly end surface 25. A second electrode head portion that is insulated from the first electrode head portion 32;
In the present embodiment, the second electrode head portion 42 of the second conductive strip 40 is located between the assembly side surface 24 and the first side surface 26. On the other hand, the second conductive portion 41 further contacts the surface of the rod body 211 of each secondary battery 21. The second electrode head portion 42 is separated from the surface of the rod body 211 of the first secondary battery 21A and serves as a power output end of the assembled battery.

  Each of the plurality of conductors 50 includes a first conductive end portion 51 that is electrically connected to the first conductive portion 31 and a second conductive end portion 52 that is electrically connected to each positive electrode end 212. In the present embodiment, the first conductive end portion 51 of each conductive tool 50 is fastened to the first conductive portion 31 of the first conductive strip 30 by the screw 71 and the washer 73, and the second conductive property of each conductive tool 50 is fixed. The end 52 is welded to the positive electrode end 212 of each secondary battery 21.

Each of the plurality of fuses 60 includes a first conductive pin 61 that is electrically connected to the second conductive portion 41 and a second conductive pin 62 that is electrically connected to each negative electrode end 213. Is provided. Thus, each fuse 60 is electrically connected to one secondary battery 21. When the current flowing through the fuse 60 exceeds a certain value, the fuse 60 becomes high temperature and blows, whereby the first conductive pin 61 and the second conductive pin 62 become an open circuit, and the secondary battery 21 that fails causes the entire assembled battery to Prevent damage.
In this embodiment, the first conductive pin 61 of each fuse 60 is fastened to the second conductive portion 41 of the second conductive strip 40 by screws 72 and washers 74, and the second conductive pin 62 of each fuse 60 is These are welded to the negative electrode end 213 of each secondary battery 21.

Next, the effect of the present embodiment will be described in detail.
(1) The first conductive portion 31 and the second conductive portion 41 of the first conductive strip 30 and the second conductive strip 40, which connect the secondary batteries 21 in parallel, are assembled side surfaces of the secondary battery group 20. 24, and each fuse 60 that protects each secondary battery 21 is provided on the assembly side surface 24 of the secondary battery group 20.
Thus, the first conductive strip 30, the second conductive strip 40, and each fuse 60 are similarly positioned on the assembly side surface 24 of the secondary battery group 20, that is, the rod body 211 of each secondary battery 21. Located on the same side. Thereby, the space only on one side of the secondary battery group 20 can be increased, and the occupied space can be decreased.

(2) The two conductive strips 30 and 40 are integrally formed with conductive portions 31 and 41 for connecting a plurality of secondary batteries 21 in parallel and electrode head portions 32 and 42 serving as power output ends. Therefore, no wiring is required between the first conductive part 31 and the first electrode head part 32, and no wiring is required between the second conductive part 41 and the second electrode head part 42. As a result, it is possible to eliminate short circuits due to wiring work and disconnection of connection cables, and the path for parallel connection is simplified.

  In the present embodiment, the first conductive portion 31 of the first conductive strip 30 contacts the surface of the rod body 211 of each secondary battery 21, and the first electrode head portion 32 of the first conductive strip 30 is the first secondary. Although separated from the surface of the rod body 211 of the battery 21A, a partition plate (not shown) is provided between the first conductive portion 31 and the surface of the rod body 211 of each secondary battery 21, or the first conductive portion 31 is provided. May be separated from the surface of the rod body 211 of each secondary battery 21, or the first electrode head portion 32 abuts on the surface of the rod body 211 of the first secondary battery 21 </ b> A, or the first electrode A partition plate (not shown) may be provided between the head portion 32 and the surface of the rod body 211 of the first secondary battery 21A.

  Similarly, in the present embodiment, the second conductive portion 41 of the second conductive strip 40 abuts on the surface of the rod body 211 of each secondary battery 21, and the second electrode head portion 42 of the second conductive strip 40 is one. The second secondary battery 21A is separated from the surface of the rod body 211, but a partition plate (not shown) is provided between the second conductive portion 41 and the surface of the rod body 211 of each secondary battery 21, or the first The two conductive parts 41 may be separated from the surface of the rod body 211 of each secondary battery 21, or the second electrode head part 42 contacts the surface of the rod body 211 of the first secondary battery 21A, Alternatively, a partition plate (not shown) may be provided between the second electrode head portion 42 and the surface of the rod body 211 of the first secondary battery 21A.

  In particular, since each secondary battery 21 connected in parallel has a fuse 60, when any one of the secondary batteries 21 fails or the current becomes abnormal, the fuse 60 of the secondary battery 21 has a high temperature. As a result, the first conductive pin 61 and the second conductive pin 62 become an open circuit, and the secondary battery 21 is prevented from being damaged by the failed secondary battery 21, and the other secondary batteries 21 are normal. Therefore, it is possible to avoid interruption of power and occurrence of accidents.

Please refer to FIG. FIG. 8 is a perspective view showing Embodiment 2 of the present invention. The difference of the present embodiment from the first embodiment further includes a case 80, which includes the secondary battery group 20, the first conductive strip 30, the second conductive strip 40, and the respective conductive tools 50. Each fuse 60 is accommodated, and the first electrode head part 32 and the second electrode head part 42 are to protrude from the case and be exposed to the outside.
In this way, assembly of the assembled battery is convenient, and circuit elements such as the secondary battery group 20, the first conductive strip 30, the second conductive strip 40, the respective conductive tools 50, and the respective fuses 60 are well protected (for example, Waterproof, dustproof and anti-collision), and the fastener 80 is fastened to the first electrode head portion 32 of the first conductive strip 30 and the second electrode head portion 42 of the second conductive strip 40, so that an external cable is used. Can be electrically connected to the first electrode head portion 32 and the second electrode head portion 42, which makes maintenance work convenient.

  The present invention can be applied to an assembled battery.

11 Frame 12 Conductive strip 13 Secondary battery 14 Security unit 15 and 16 Electrode head 17 Connection cable 20 Secondary battery group 21 and 21A Secondary battery 22 Positive electrode end surface 23 Negative electrode end surface 24 Assembly side surface 25 Assembly end surface 26 First side surface 30 First conductive strip 31 First conductive portion 32 First electrode head portion 40 Second conductive strip 41 Second conductive portion 42 Second electrode head portion 50 Conductor 51 First conductive end portion 52 Second conductive end portion 60 Fuse 61 First conductive pin 62 Second conductive pin 71, 72 Screw 73, 74 Washer 80 Case 81 Fastener 111 Edge strip 211 Rod body 212 Positive electrode end 213 Negative electrode end

Claims (4)

A plurality of secondary batteries are connected in parallel by two conductive strips,
A plurality of secondary batteries having a rod shape having a circular cross section are arranged so as to face in the same direction, and each of the secondary batteries includes a rod body, a positive electrode end positioned at one end of the rod body, A negative electrode end positioned at the other end of the rod body, each positive electrode end is positioned at the same positive electrode end surface, each negative electrode end is positioned at the same negative electrode end surface, and the positive electrode end surface and the negative electrode end surface Between the assembly side surface located on the side surface of the rod body of each secondary battery and the side surface of the rod body of the first secondary battery whose direction is different from that of the assembly side surface. A secondary battery group having an attached end surface;
A first conductive strip having a first conductive portion provided on the assembled side surface; and a first electrode head portion integrally formed with the first conductive portion and positioned on the assembled end surface;
A second conductive part that is provided on the assembly side surface, is formed integrally with the second conductive part and is insulated from the first conductive part, and is located on the assembled end face and insulated from the first electrode head part. A second conductive strip having a second electrode head portion,
A plurality of conductive tools each having a first conductive end portion electrically connected to the first conductive portion and a second conductive end portion electrically connected to each positive electrode end;
A plurality of fuses each having a first conductive pin electrically connected to the second conductive portion and a second conductive pin electrically connected to each negative electrode end, provided on the assembly side surface; only including,
The secondary battery group further includes a first side surface positioned on a side surface of the rod body of each of the secondary batteries and facing the assembled side surface, and the first electrode head portion of the first conductive strip. And the second electrode head part of the second conductive strip is located between the assembled side surface and the first side surface,
Collective battery.   The case further includes a case, wherein the case contains the secondary battery group, the first conductive strip, the second conductive strip, the conductive tools, and the fuses, and the first electrode. The assembled battery according to claim 1, wherein the head part and the second electrode head part protrude from the case and are exposed to the outside.   The first conductive end portion of each conductive tool is fastened to the first conductive portion of the first conductive strip by a screw, and the second conductive end portion of each conductive tool is connected to each secondary battery. The assembled battery according to claim 1, wherein the battery is welded to the positive electrode end.   The first conductive pin of each fuse is fastened to the second conductive portion of the second conductive strip by a screw, and the second conductive pin of each fuse is connected to the negative end of the secondary battery. The assembled battery according to claim 1, wherein the assembled battery is welded to the battery.

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