JP4609623B2 - Battery binder - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a battery binding tool for binding square batteries housed in a battery pack used as a power supply unit such as a hybrid vehicle (HEV) or an electric vehicle (PEV).
[0002]
[Prior art]
A power supply unit called a battery pack is known as a power source for a drive motor of a hybrid vehicle or an electric vehicle. The battery pack is a battery pack in which a plurality of secondary battery modules such as nickel metal hydride batteries and lithium ion batteries are connected in series together with a control device in a case such as a synthetic resin. The battery pack secures the necessary voltage by connecting a plurality of secondary batteries in series, and measures the voltage, current, temperature, etc. by the control device, and determines the battery capacity and the required charge / discharge amount, etc. Thus, charging and discharging are controlled.
[0003]
Patent Document 1 describes a nickel-cadmium secondary battery in which a plurality of single cells are incorporated in a rectangular case.
[Patent Document 1]
Japanese Examined Patent Publication No. 4-79106 [0004]
[Problems to be solved by the invention]
By the way, in the above-described battery pack, a plurality of batteries are accommodated in order to obtain a necessary voltage, but there is a demand to bind and integrate them. At this time, it is desired to use a rectangular battery having a substantially rectangular flat plate shape because of space-saving requirements. Moreover, sufficient heat dissipation is requested | required of the battery in a battery pack.
[0005]
The present invention has been made in view of the above points, and an object of the present invention is to provide a battery binding tool that can bind and integrate a plurality of prismatic secondary batteries and is excellent in heat dissipation. .
[0006]
[Means for Solving the Problems]
In order to solve the above-described problem, a battery binding device according to the invention of claim 1 includes an end plate contacting one end side of a plurality of stacked square batteries, and the corner plate from both end portions of the end plate. A plurality of U-shaped body plates having a pair of elastically stretchable tension plates extending to the other end side of the square battery along the side surface of the battery,
A termination plate that is coupled to the tip of the pair of tension plates and contacts the other end of the rectangular battery;
The plurality of main body plates are connected to the end portions of a pair of tension plates of one main body plate, and the end plates of the other main body plate are sequentially connected to abut on the square battery to bind the square batteries. ,
The end plate is connected to the tip of the tension plate of the main body plate connected to the end, and the end plate is brought into contact with the end of the square battery, thereby binding the square battery.
With this configuration, one end of the prismatic battery is brought into contact with the end plate of one main body plate, a pair of tension plates are extended, and the end plate or the end of another main body plate is attached to the tip portion thereof. When the plates are joined and brought into contact with the other end of the square battery, the square batteries are bound by the elastic force of the tension plate.
Then, another body plate is sequentially coupled to one body plate, and an end plate is coupled to the last body plate, thereby binding a plurality of prismatic batteries.
According to a second aspect of the present invention, there is provided a battery binding device according to the first aspect, wherein the tension plate has a bellows portion.
With this configuration, the tension plate expands and contracts due to elastic deformation of the bellows portion.
According to a third aspect of the present invention, there is provided a battery binding device according to the first or second aspect, wherein a temperature sensor is attached to the end plate.
With this configuration, the temperature of the prismatic battery in contact with the end plate can be detected by the temperature sensor.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 and 2, the battery binding device 1 according to the present embodiment is for stacking and integrally binding rectangular batteries B1 and B2 having substantially rectangular flat plates with four corners chamfered. The main body plate 2 and the terminal plate 3 are provided. As the square batteries B1 and B2, for example, a secondary battery such as a lithium ion battery used as a power source for a hybrid vehicle, an electric vehicle, or the like is assumed. The battery may be a primary battery or a primary battery.
[0008]
The main body plate 2 is a rectangular flat plate end plate 4 that comes into contact with one end face of the two stacked square batteries B1 and B2, and is bent vertically from both ends of the end plate 4, It is formed in a substantially U-shape having a pair of tension plates 5 extending to the other end face side of the prismatic batteries B1 and B2 along the side surfaces of the battery B1 and B2.
[0009]
At both left and right end portions of the end plate 4, a plurality of (three in the illustrated example) claw portions 6 extending in the vertical direction with respect to the tension plate 5 are provided. . The same number of slots 7 through which the claw portions 6 can be inserted are provided at the tip portions of the pair of tension plates 5 at the same intervals as the claw portions 6. The slot 7 is disposed slightly on the end plate 4 side from the position of the end surface opposite to the end surface that contacts the end plate 4 of the square batteries B1 and B2. The pair of tension plates 5 has a bellows portion 8 formed at an intermediate portion thereof, and can be expanded and contracted by elastic deformation of the bellows portion 8. The tension plate 5 may be elastically stretchable by other means. The end plate 4 may be formed with reinforcing ribs 9 (see FIG. 3A) by bending the upper end portion or the lower end portion thereof.
[0010]
An end plate 3 is attached to the tip of the pair of tension plates 5. End plate 3 is a flat member abuts the other end surface of one of the prismatic battery B1 end face abuts against the end plate 4, B2, the opposite ends thereof, a pair of tension plates 5 each A plurality of claw portions 10 that can be inserted into the slot 7 are provided. The claw portion 10 is arranged in the same manner as the claw portion 6 of the main body plate 2. The upper and lower ends of the end plate 3 are bent to form reinforcing ribs 11.
[0011]
The main body plate 2 and the termination plate 3 are made of a material having high thermal conductivity and moderate elasticity, and can be integrally formed by, for example, pressing a metal plate material. Depending on the situation, several parts can be combined and joined together by welding or the like.
[0012]
A sheet-like temperature sensor 12 made of a thermocouple or the like can be attached to the end plate 4 and the end plate 3 of the main body plate 2.
[0013]
Next, the operation of the present embodiment configured as described above will be described.
A procedure for binding and integrating the two rectangular batteries B1 and B2 by the battery binding tool 1 will be described with reference to FIG.
[0014]
Referring to FIG. 3, (A) two square batteries B1 and B2 are overlapped. (B) The two rectangular batteries B1 and B2 that are overlapped are inserted between the pair of tension plates 5 of the main body plate 2 so that one end surfaces of the square batteries B1 and B2 are brought into contact with the end plate 4. (C) The front ends of the pair of tension plates 5 are expanded, the end plate 3 is inserted between them, and brought into contact with the other end surfaces of the rectangular batteries B1 and B2. (D) The end plate 3 is pressed against the square batteries B1 and B2, the tension plate 5 is pulled, the claw portion 10 of the end plate 3 is inserted into the slot 7, the claw portion 10 is bent, and the body plate 2 And the end plate 3 are coupled. In this way, the two rectangular batteries B1 and B2 can be bundled and integrated.
[0015]
Next, as shown in FIG. 4, a procedure for modularizing the two rectangular batteries B <b> 1 and B <b> 2 by the body plate 2 and binding and integrating the four rectangular batteries B <b> 1 and B <b> 2 will be described with reference to FIG. 5. explain.
[0016]
Referring to FIG. 5, first, (A) two rectangular batteries B1 and B2 constituting the first module are overlapped and inserted between a pair of tension plates 5 of the first body plate 2, One end surfaces of the square batteries B <b> 1 and B <b> 2 are brought into contact with the end plate 4. (B) The front ends of the pair of tension plates 5 are expanded, the end plate 4 of the second main body plate 2 is inserted between them, and brought into contact with the other end surfaces of the square batteries B1 and B2, By pressing this, the tension plate 5 of the first main body plate 2 is pulled, the claw portion 6 of the second main body plate 2 is inserted into the slot 7, the claw portion 6 is bent, and the first, first The two body plates 2 are joined together.
[0017]
Next, (C) the two square batteries B1 and B2 constituting the second module are overlapped and inserted between the pair of tension plates 5 of the second main body plate 2, and the secondary battery B3, One end surface of B4 is brought into contact with the end plate 4. (D) The front ends of the pair of tension plates 5 of the second main body plate 2 are widened, the end plate 3 is inserted between them, and brought into contact with the other end surfaces of the square batteries B1 and B2, The tension plate 5 of the second main body plate 2 is pressed to pull the claw portion 10 of the end plate 3 through the slot 7, the claw portion 10 is bent, and the second main body plate 2 and the end plate 3 is combined. In this way, by connecting two modules including the two rectangular batteries B1 and B2, the four rectangular batteries B1 and B2 can be bundled and integrated.
[0018]
Further, as described above, the two rectangular batteries B1 and B2 are modularized, the modules are sequentially coupled, and the terminal plate 4 is coupled to the main body plate 2 of the finally coupled module, so that the required number of 2 Secondary batteries can be bundled and integrated. In this way, any number of prismatic batteries B1 and B2 can be bundled and integrated. As a result, the number of square batteries B1 and B2 corresponding to the required voltage can be bundled and integrated and accommodated in the case of the battery pack.
[0019]
At this time, by pulling the tension plate 5 and elastically deforming the bellows portion 8, the body plate 2 or the end plate 3 is coupled to generate an appropriate binding force by elastic deformation of the bellows portion 8. Dimensional errors can be absorbed. Further, the heat generated by the square batteries B1 and B2 is received by the end plate 4 and the end plate 3, is transmitted to the tension plate 5, and is radiated from the bellows part 8 having a large surface area. , B2 heat dissipation can be promoted.
[0020]
By attaching the temperature sensor 12 to the end plate 4 and the end plate 12 of the main body plate 2, the temperature of the square battery B1 or B2 adjacent to these can be detected. At this time, the end plate 4 disposed between the two rectangular batteries B1 and B2 (for example, the end plate 4 disposed between the two central rectangular batteries B1 and B2 in FIGS. 4 and 5). ) Can detect the temperature of the two rectangular batteries B1 and B2 at the same time, and can detect that there is an abnormality in at least one of these rectangular batteries B1 and B2. .
[0021]
Here, in general, in the battery pack, the individual voltages and currents of the plurality of batteries are detected by the control device, and therefore, these detected values are combined with the detection of the temperature abnormality by the temperature sensor 12. By combining them, it is possible to identify the square batteries B1 and B2 in which an abnormality has occurred. Thereby, the number of temperature sensors can be reduced.
[0022]
In the above-described embodiment, as an example, a case has been described in which the main body plate 2 binds the two rectangular batteries B1 and B2 into a module, but in addition, the length of the tension plate 5 is appropriately set. By setting, it is also possible to bundle one or three or more prismatic batteries by the main body plate 2 as necessary to form a module.
[0023]
【The invention's effect】
As described in detail above, according to the battery restraint device of the present invention, the prismatic battery can be bound by the elastic force of the tension plate, and the end of the other body plate can be attached to the tension plate of one body plate. By combining the plates and sequentially connecting the main body plates, any number of prismatic batteries can be bound and integrated.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which two prismatic batteries are bound by a battery binding tool according to an embodiment of the present invention.
2 is a perspective view of a main body plate of the battery binding device shown in FIG. 1 as viewed from the back side.
FIG. 3 is a diagram showing a procedure for binding a rectangular battery with the battery binding device shown in FIG. 1;
4 is a perspective view showing a state in which four prismatic batteries are bound by the battery binding tool shown in FIG. 1. FIG.
FIG. 5 is a diagram showing a procedure for binding a quadrangular battery with the battery binding device shown in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Battery binding tool 2 Main body plate 3 Termination plate 4 End part plate 5 Tension plate 8 Bellows part 12 Temperature sensor B1, B2 Square battery

Claims (3)

An end plate contacting one end side of the plurality of stacked square batteries, and elastically extending from both end parts of the end plate to the other end side of the square battery along the side surface of the square battery A plurality of U-shaped body plates having a pair of stretchable tension plates;
A termination plate that is coupled to the tip of the pair of tension plates and contacts the other end of the rectangular battery;
The plurality of main body plates are connected to the end portions of a pair of tension plates of one main body plate, and the end plates of the other main body plate are sequentially connected to abut on the square battery to bind the square batteries. ,
A battery binding tool, wherein the end plate is connected to a tip portion of a tension plate of the main body plate connected to the end and is brought into contact with the square battery to bind the square battery.   The battery binding tool according to claim 1, wherein the tension plate has a bellows portion.   The battery binding device according to claim 1, wherein a temperature sensor is attached to the end plate.

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