JP2013191285A - Battery temperature raising device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery temperature raising device capable of raising temperature of a battery at higher efficiency and reducing probability that the temperature of the battery becomes lower than a predetermined temperature.SOLUTION: A medium passage through which a temperature adjusting wind 3 is passed is formed between a plurality of batteries 10. A thermally conductive plate 8 is disposed on a downstream side of these batteries 10 along a flow direction of the temperature adjusting wind 3. The thermally conductive plate 8 includes: a thermally conductive plate body 80 disposed so as to be directly contacted with external surfaces of the batteries 10; and a tongue piece 81 extended from an outer edge of the thermally conductive plate body 80. A DC/DC converter 7 is attached to the tongue piece 81, and heat generated in the DC/DC converter 7 is transmitted via the thermally conductive plate 8 to the batteries 10.

Description

  The present invention relates to a battery temperature raising device for raising a temperature of a battery.

  As this type of battery temperature raising device conventionally used, for example, a battery temperature raising device shown in the following Patent Document 1 or the like is used. That is, in the conventional apparatus, the on-vehicle battery is arranged in the battery box, and the DC / DC converter that transforms and outputs the battery output of the battery is arranged in the power supply equipment box. Then, the air in the power supply device box is supplied into the battery box as temperature-controlled air, whereby heat generated by the DC / DC converter is transmitted to the battery in the battery box, and the battery is heated.

JP 2008-41376 A

  In the conventional battery temperature raising apparatus as described above, since the heat generated by the DC / DC converter is configured to be transmitted to the battery via the temperature-controlled air (air), the temperature raising efficiency is low. For example, in cold regions, the battery temperature may be lower than a predetermined temperature.

  The present invention has been made to solve the above-described problems, and its object is to increase the battery temperature with higher efficiency and to reduce the possibility that the battery temperature falls below a predetermined temperature. Is to provide a device.

  The battery temperature increasing device according to the present invention, a heat conduction plate provided so as to be in direct contact with the outer surface of the assembled battery comprising a plurality of batteries, and attached to the heat conduction plate and electrically connected to the assembled battery, A DC / DC converter that transforms and outputs the output of the assembled battery is provided, and heat generated by the DC / DC converter is transmitted to each battery of the plurality of batteries via the heat conduction plate.

  According to the battery temperature raising apparatus of the present invention, the heat generated by the DC / DC converter is transmitted to each battery of the plurality of batteries via the heat conducting plate, so the temperature of the battery is raised with higher efficiency. This can reduce the possibility that the temperature of the battery is lower than the predetermined temperature.

It is a perspective view which shows the assembled battery to which the battery temperature rising apparatus by Embodiment 1 of this invention is applied.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a perspective view showing an assembled battery 1 to which a battery temperature raising device according to Embodiment 1 of the present invention is applied. In the figure, the assembled battery 1 is configured by electrically connecting a plurality of batteries 10 to each other. Although not shown, the assembled battery 1 is mounted on an electric vehicle or a hybrid vehicle, and is electrically connected to a motor / generator such as an electric vehicle. That is, the assembled battery 1 supplies electric power to a motor / generator such as an electric vehicle and stores regenerative electric power from the motor / generator. Generally, the output voltage of the assembled battery 1 is about 200V to 300V.

  The battery 10 constituting the assembled battery 1 is a rectangular battery having a substantially rectangular outer shape, and is arranged at intervals from each other in a direction in which the longitudinal directions thereof are parallel to each other. A pair of adjacent batteries 10 are connected to each other by a connecting member 2. A medium flow path through which the temperature-controlled air 3 (air) flows is formed between the batteries 10.

  The temperature control air 3 is a temperature control medium for adjusting the temperature of each battery 10. This temperature-controlled air 3 is sent by a fan 4 disposed upstream of the assembled battery 1 along the flow direction of the temperature-controlled air 3. The fan 4 is disposed in the vicinity of the Peltier element 5 having the fins 5a. As is well known, the Peltier element 5 is an element that moves heat when an electric current flows, and heats or cools the fins 5a according to the direction of the electric current that flows. In other words, the temperature-controlled air 3 is adjusted in temperature according to the direction of the current flowing through the Peltier element 5 to become cooling air or temperature rising air.

  The Peltier element 5 is connected to the assembled battery 1 via the switching circuit 6 and the DC / DC converter 7. The switching circuit 6 and the DC / DC converter 7 are for supplying power to the Peltier element 5. The DC / DC converter 7 is electrically connected to the assembled battery 1 and transforms and outputs the battery output of the assembled battery 1. Specifically, the DC / DC converter 7 steps down and outputs the battery output of the assembled battery 1 of about 200 V to 300 V to about 20 V suitable for the operation of the Peltier element 5. The switching circuit 6 switches the polarity of the voltage (output of the DC / DC converter 7) input to the Peltier element 5 and switches the direction of the current flowing through the Peltier element 5. That is, the temperature control air 3 is changed to the cooling air or the temperature increasing air by the polarity switching operation of the switching circuit 6.

  The DC / DC converter 7 is attached to a heat conduction plate 8 disposed on the downstream side of the assembled battery 1 along the flow direction of the temperature-controlled air 3. The heat conductive plate 8 is a plate member made of a material having high thermal conductivity such as copper. The heat conductive plate 8 includes a heat conductive plate main body 80 and a tongue piece portion 81.

  The heat conductive plate body 80 is a flat plate extending along the separation direction and the height direction of each battery 10. The heat conductive plate main body 80 is disposed so as to be in direct contact with the outer surface of each battery 10 (the end face of each battery 10 on the downstream side along the flow direction of the temperature control air 3). The heat conduction plate main body 80 is provided with a plurality of slits 80 a communicating with the medium flow path between the batteries 10. The temperature control air 3 passing through the medium flow path between the batteries 10 flows downstream through the slit 80a.

  The tongue piece portion 81 is a flat plate extending from the outer edge of the heat conducting plate main body 80. That is, the tongue piece 81 is provided integrally with the heat conductive plate main body 80. Further, the tongue portion 81 is bent at a right angle from the heat conductive plate main body 80, thereby extending along the extending direction of the medium flow path between the batteries 10 (longitudinal direction of the batteries 10). Yes. The tongue piece 81 is provided in contact with the upper surface of at least one battery 10.

  As is well known, the DC / DC converter 7 generates heat when performing a transformation operation. The heat generated at this time is transmitted to each battery 10 via the heat conductive plate 8 (the tongue piece 81 and the heat conductive plate main body 80). The battery temperature raising apparatus of the present embodiment is constituted by the DC / DC converter 7 and the heat conducting plate 8, and each battery 10 that is performed by the temperature-controlled air 3 generated by the Peltier element 5 and the fan 4. In addition to the temperature adjustment, each battery 10 is heated.

  In such a battery temperature raising device, since the heat generated in the DC / DC converter 7 is configured to be transmitted to each battery 10 via the heat conducting plate 8, the heat generated in the DC / DC converter 7 is more increased. It can be transmitted to each battery 10 efficiently. That is, the battery 10 can be heated with higher efficiency, and the possibility that the temperature of the battery 10 is lower than the predetermined temperature can be reduced. This configuration is particularly effective in cold regions where the temperature of the battery 10 is more important than the cooling of the battery 10.

  Further, since the DC / DC converter 7 is attached to the tongue piece portion 81 extending from the outer edge of the heat conduction plate main body 80, the DC / DC converter 7 can be attached to the heat conduction plate 8 more reliably. Thus, the possibility that the temperature of the battery 10 is lower than the predetermined temperature can be reduced more reliably. That is, although it is conceivable to attach the DC / DC converter 7 to the heat conduction plate body 80, since the plurality of slits 80a are provided in the heat conduction plate body 80, the heat conduction plate body 80 is provided so as to avoid the slits 80a. It may be difficult to attach the DC / DC converter 7. Such a problem can be solved by attaching the DC / DC converter 7 to the tongue piece portion 81 as in the present embodiment.

  In the first embodiment, the DC / DC converter 7 is described as being attached to the tongue piece 81. For example, when the DC / DC converter is small, or the components of the DC / DC converter are arranged around the slit. For example, the DC / DC converter may be attached to the main body of the heat conduction plate. In this case, the tongue piece may be omitted from the heat conducting plate.

  In the first embodiment, the heat conduction plate 8 has been described as being disposed on the downstream side of the assembled battery 1 along the flow direction of the temperature control air 3. However, the heat conduction plate is in the flow direction of the temperature adjustment medium. May be arranged on the upstream side of each battery.

  3 Temperature control air (temperature control medium), 7 DC / DC converter, 8 heat conduction plate, 10 battery, 80a slit, 80 heat conduction plate body, 81 tongue piece.

Claims (2)

A heat conductive plate provided so as to be in direct contact with the outer surface of the assembled battery comprising a plurality of batteries;
A DC / DC converter attached to the heat conducting plate and electrically connected to the assembled battery and transforming and outputting the output of the assembled battery,
A battery temperature increasing device configured to transmit heat generated by the DC / DC converter to each battery of the plurality of batteries via the heat conducting plate. Each of the batteries is spaced from each other,
Between each battery, a medium flow path through which the temperature control medium flows is formed,
In the heat conduction plate,
A plurality of slits communicated with the medium flow path, and a heat conduction plate body disposed so as to be in direct contact with the outer surface of each battery;
A tongue piece extending from the outer edge of the heat conducting plate body,
The battery temperature increasing device according to claim 1, wherein the DC / DC converter is attached to the tongue piece.

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