JP2015156347A - Battery temperature adjustment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery temperature adjustment device capable of improving cooling efficiency of a battery.

SOLUTION: A battery temperature adjustment device includes: an inlet protrusion (12) which is formed by being protruded from a heat exchange part (30) and equipped with a cooling water inlet (13) through which cooling water flows into the heat exchange part (30); and an outlet protrusion (14) which is formed by being protruded from the heat exchange part (30) and equipped with a cooling water outlet through which the cooling water flows out from the heat exchange part (30). The heat exchange part (30) has a diffusion part (34) which diffuses the cooling water flowed in from the inlet protrusion (12) in the direction different from the flow of the cooling water from the inlet protrusion (12) to the outlet protrusion (14) in the heat exchange part (30).

COPYRIGHT: (C)2015,JPO&INPIT

Description

  The present invention relates to a battery temperature control device that adjusts the temperature of a battery mounted on a vehicle.

  A battery is used as a power source for a hybrid vehicle or an electric vehicle. In addition to the high temperature of the battery during charging and discharging, the efficiency decreases at low temperatures. Therefore, it is common to install a temperature control device that adjusts the battery to an appropriate temperature in the vicinity of the battery.

  As such a battery temperature control device, a cooling device is disclosed in which cooling plates having medium flow paths are alternately arranged between a plurality of battery cells constituting a battery module (see Patent Document 1).

JP 2013-101926 A

  Generally, the battery cell has the highest temperature near the terminal. In the prior art as described in Patent Document 1, the cooling water inlet and the battery cell terminal are provided apart from each other. Furthermore, the cooling water flow path is complicatedly meandering inside the battery temperature control device. Therefore, the cooling efficiency of the battery may be reduced.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a temperature control device that controls the temperature of a battery and that can improve cooling efficiency.

  According to an embodiment of the present invention, there is provided a plate-like battery temperature control device that adjusts the temperature of a battery by circulating a medium, and is provided with a heat exchange part having a medium flow path, and protruding from the heat exchange part. An inlet convex portion that is formed and includes a medium inlet that allows the medium to flow into the heat exchanging portion, and an outlet convex portion that is formed to protrude from the heat exchanging portion and includes a medium outlet that allows the medium to flow out of the heat exchanging portion. The heat exchange unit includes a diffusion unit that diffuses the medium flowing in from the inlet convex portion in a direction different from the flow of the medium from the inlet convex portion to the outlet convex portion in the heat exchange portion. .

  According to the embodiment of the present invention, the low-temperature cooling water flowing from the inlet convex portion is diffused in the heat exchanging portion in the vicinity of the inlet convex portion, so that the heat exchange efficiency can be improved by removing the heat in this vicinity. . Since the battery heat generation and the temperature distribution of the battery due to the heat generation are generally biased, the heat exchange efficiency can be increased for the part where the temperature is high.

It is explanatory drawing of a battery unit provided with the battery temperature control apparatus of embodiment of this invention. It is explanatory drawing of the battery temperature control apparatus of embodiment of this invention. It is explanatory drawing of the battery temperature control apparatus of embodiment of this invention. It is an enlarged view near the entrance convex part of the battery temperature control apparatus of embodiment of this invention. It is explanatory drawing of the other structural example of the battery temperature control apparatus of embodiment of this invention. It is another example explanatory drawing of a battery unit provided with the battery temperature control apparatus of embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an explanatory diagram of a battery unit 100 including the battery temperature control device 10 of the present embodiment.

  The battery unit 100 is disposed in a vehicle, for example, and serves as a power source for a motor for driving the vehicle and various electrical devices.

  The battery unit 100 is configured by stacking a plurality of battery modules 150. Between the set of battery modules 150, the battery temperature adjusting device 10 that adjusts the temperature of the battery module 150 is sandwiched.

  One end of the battery module 150 is provided with a terminal 153 including a positive terminal 151 and a negative terminal 152 that transfer power to the battery module 150.

  In the present embodiment, the surface having the terminal 153 is called a terminal surface 251, and the surface facing the terminal surface 251 having the terminal 153 is called a back surface 252.

  In the battery temperature adjustment device 10, the inlet convex portion 12 having the cooling water inlet 13 through which the cooling water flows into the battery temperature adjustment device 10 is formed on the terminal surface 251 side of the battery module 150. Pipes 21 for supplying cooling water to each battery temperature control device 10 are connected to the cooling water inlet 13.

  The pipe 21 is disposed between the positive electrode terminal 151 and the negative electrode terminal 152 on the terminal surface 251 of the battery module 150. The positive terminal 151 and the negative terminal 152 are electrically coupled by a bus bar or the like. The pipe 21 through which the cooling water flows is disposed between the bus bars connecting the positive terminal 151 and the negative terminal 152, respectively.

  In the present embodiment, LLC (Long Life Coolant) is used as the cooling water flowing through the battery temperature adjusting device 10. Other media (liquid or gas) may be used as cooling water.

  FIG. 2 is a perspective perspective view illustrating the battery module 150 and the battery temperature control device 10 according to the present embodiment.

  The battery module 150 has a cubic shape. The battery modules 150 are stacked and disposed, and the battery temperature control device 10 is sandwiched between a set of battery modules 150. The battery temperature control device 10 has a shape along the shape of the surface on which the battery modules 150 are stacked.

  The battery temperature control apparatus 10 includes a heat exchange unit 30 that contacts the battery module 150 and performs heat exchange with the battery module. The heat exchanger 30 of the battery temperature control apparatus 10 has an inlet convex portion 12 having a cooling water inlet 13 through which cooling water flows and an outlet convex portion 14 having a cooling water outlet 15 through which cooling water flows out. Is formed. A pipe 21 for supplying cooling water is connected to the inlet protrusion 12. A pipe 22 through which cooling water flows out is connected to the outlet convex portion 14.

  Thus, by sandwiching the battery temperature control device 10 formed thinly between the battery modules 150, the battery module 150 is appropriately disposed as described below without increasing the size of the battery unit 100. Can be cooled to.

  Next, the structure of the battery temperature control device 10 will be described.

  FIG. 3 is an explanatory diagram when the battery temperature adjustment device 10 of the present embodiment is observed from a surface in contact with the battery module 150.

  The battery temperature control apparatus 10 is configured by joining a pair of thin plate-like plates 31 to each other. A plurality of flow path forming portions 33 and diffusion portions 34 that form flow paths by partitioning the inside of the battery temperature control device 10 are formed on the plate 31.

  The flow path forming unit 33 is formed in a substantially linear shape in the medium flow direction of the battery temperature adjusting device 10, that is, from the inlet convex part 12 toward the outlet convex part 14. In the example of the battery temperature control apparatus 10 shown in FIG. 2, four parallel flow paths 38 partitioned by three flow path forming portions 33 are formed.

  In this way, by forming the plurality of flow paths 38 inside the battery temperature adjusting device 10, the cooling water flows in a distributed manner inside the battery temperature adjusting device 10. In the heat exchange part 30 of the battery module 150 and the battery temperature control apparatus 10, the opportunity of heat exchange can increase and heat exchange efficiency can be improved.

  In the vicinity of the inlet convex portion 12 of the battery temperature control device 10, a diffusion portion 34 is formed separately from the flow path forming portion 33. The diffusion part 34 has a function of guiding the cooling water flowing from the cooling water inlet 13 of the inlet convex part 12 to the vicinity of the terminal 153 of the battery module 150.

  FIG. 4 is an enlarged view of the vicinity of the inlet convex portion 12 of the battery temperature adjusting device 10 of the present embodiment.

  The entrance protrusion 12 is formed to protrude toward the terminal surface 251 of the battery module 150. The inlet protrusion 12 includes a cooling water inlet 13. The cooling water flows linearly from the cooling water inlet 13 through the inlet protrusion 12 and flows into the battery temperature control device 10.

  A diffusion unit 34 is formed in the heat exchange unit 30 of the battery temperature control device 10. The diffusing unit 34 is configured to change the cooling water flowing from the inlet convex part 12 in a direction different from the flow of the cooling water from the inlet convex part 12 to the outlet convex part 14, more specifically, the diffusing part 34 is a battery module. The cooling water flows in the direction of 150 terminals 153.

  The diffusing unit 34 is provided closer to the flow path 38 of the battery temperature adjusting device 10 than the inlet convex portion 12. More specifically, the diffusing unit 34 is located on the side of the flow path 38 from a position in contact with a connection portion (a dashed line in FIG. 4) between the inlet convex portion 12 projecting from the battery temperature control device 10 and the heat exchanging portion 30. It is formed so as to extend. In the diffusion part 34, the cross-sectional area of the flow path at the connection portion between the inlet convex part 12 and the heat exchange part 30 is smaller than the cross-sectional area of the flow path 38 in the heat exchange part 30 or the cross-sectional area of the inlet convex part 12. Formed.

  By forming the diffusion portion 34 in this manner, the flow rate of the cooling water flowing from the inlet convex portion 12 is increased, and the cooling water is urged to flow toward the positive electrode terminal 151 and the negative electrode terminal 152 of the battery module 150. Can do.

  Generally, the battery module 150 has the highest temperature of the positive terminal 151 and the negative terminal 152. The battery temperature control apparatus 10 according to the present embodiment is configured to smoothly supply low-temperature cooling water with a high flow rate near the positive electrode terminal 151 and the negative electrode terminal 152 where the temperature increases, thereby appropriately heating the battery module 150. The charging / discharging efficiency of the battery module 150 can be increased.

  The battery temperature control apparatus 10 of the present embodiment is not limited to the shape as shown in FIG. 3 and can take various configurations.

  FIG. 5 is an explanatory diagram showing another configuration example of the battery temperature adjusting device 10 of the present embodiment.

  FIG. 5A is another configuration example of the battery temperature adjustment device 10 according to the present embodiment, in which the diffusion unit 34 is integrated with a flow path forming unit 33 provided at the center of the battery temperature adjustment device 10. is there.

  Also with this configuration, similarly to the configuration shown in FIG. 3, the diffusion portion 34 is installed so as to extend from the connection portion between the inlet convex portion 12 and the heat exchanging portion 30 to the flow path 38 side. It can comprise so that the width | variety of the flow path of the entrance convex part 12 may be narrowed in a part. Thereby, like the example shown in FIG. 3, it can be set as the structure which encourages a cooling water to flow near the positive electrode terminal 151 and the negative electrode terminal 152 where temperature becomes high.

  FIG. 5B is still another configuration example of the battery temperature adjustment device 10 of the present embodiment, and the diffusion portion 34 is integrated with two flow path forming portions 33 provided on the side surface side of the battery temperature adjustment device 10. It is the composition made.

  As described above, the diffusing unit 34 may be provided in a plurality instead of one. Further, the diffusing portion 34 may be provided to be inclined with respect to the flow direction of the cooling water, and may not be close to the central flow path forming portion 33.

  Also with this configuration, similarly to the configuration shown in FIG. 3, the diffusion portion 34 is installed so as to extend from the connection portion between the inlet convex portion 12 and the heat exchanging portion 30 to the flow path 38 side. It can comprise so that the width | variety of the flow path of the entrance convex part 12 may be narrowed in a part. Thereby, like the example shown in FIG. 3, it can be set as the structure which encourages a cooling water to flow near the positive electrode terminal 151 and the negative electrode terminal 152 where temperature becomes high.

  FIG. 5C is still another configuration example of the battery temperature adjusting device 10 of the present embodiment, in which the length in the longitudinal direction of the central flow path forming portion 33 is changed corresponding to the diffusing portion 34. is there.

  Also with this configuration, similarly to the configuration shown in FIG. 3, the diffusion portion 34 is installed so as to extend from the connection portion between the inlet convex portion 12 and the heat exchanging portion 30 to the flow path 38 side. It can comprise so that the width | variety of the flow path of the entrance convex part 12 may be narrowed in a part. Thereby, like the example shown in FIG. 3, it can be set as the structure which encourages a cooling water to flow near the positive electrode terminal 151 and the negative electrode terminal 152 where temperature becomes high.

  In the present embodiment, various configurations can be adopted as illustrated in FIG. With such a configuration, it is possible to select a battery temperature adjustment device having an appropriate shape in accordance with the shape and capacity of the battery module 150. Therefore, the temperature of the battery module 150 can be adjusted appropriately, and the battery module 150 Charge / discharge efficiency can be increased.

  FIG. 6 is an explanatory diagram of another example of the battery unit 100 including the battery temperature adjustment device 10 of the present embodiment.

  As described with reference to FIG. 1, the battery modules 150 are stacked and the battery temperature control device 10 is sandwiched between a pair of battery modules 150.

  In contrast, in the example illustrated in FIG. 6, a set of battery modules 150 sandwiches the battery temperature control device 10, and another set of battery modules 150 is provided on the back surface 252 side of the set of battery modules 150. The battery modules 150 are arranged in series so that the terminal surface 251 of the battery is located. A pipe 24 through which the cooling water from the outlet convex portion 14 of another adjacent battery temperature adjusting device 10 flows is connected to the inlet convex portion 12 of the battery temperature adjusting device 10.

  With such a configuration, when the battery modules 150 are arranged in series and the battery unit 100 is extended in the longitudinal direction, the pipe 24 of the battery temperature control device 10 is arranged between the terminals 153. , Does not get in the way of other configurations. Thus, the battery module 150 can be appropriately cooled without increasing the size of the battery unit 100.

  As described above, in the present embodiment, the plate-shaped battery temperature control device 10 performs heat exchange of the battery module 150 by circulating a medium represented by cooling water. The battery temperature control device 10 includes a heat exchanging unit 30 having a cooling water flow path, and an inlet provided with a cooling water inlet 13 that is formed to protrude from the heat exchanging unit 30 and allows cooling water to flow into the heat exchanging unit 30. A convex portion 12 and an outlet convex portion 14 provided with a cooling water outlet 15 that is formed so as to protrude from the heat exchanging portion 30 and allow cooling water to flow out of the heat exchanging portion 30. The heat exchanging unit 30 includes a diffusion unit 34 that diffuses the cooling water flowing from the inlet convex portion 12 in a direction different from the flow of the cooling water from the inlet convex portion 12 to the outlet convex portion 14 in the heat exchanging portion 30.

  With such a configuration, the battery temperature adjustment device 10 diffuses the low-temperature cooling water flowing from the inlet convex portion 12 in the heat exchanging portion 30 in the vicinity of the inlet convex portion 12, so that heat in this vicinity is taken away. The heat exchange efficiency can be increased. Since the battery module 150 generates heat and the temperature distribution of the battery module 150 due to the heat generation is generally uneven, the heat exchange efficiency can be increased at a portion where the temperature of the battery module 150 is high.

  The diffusion part 34 of the battery temperature control device 10 is formed so that the cross-sectional area of the inlet flow path between the inlet convex part 12 and the heat exchange part 30 is smaller than the cross-sectional area of the flow path of the heat exchange part. Therefore, the flow velocity in this vicinity can be increased and the heat exchange efficiency can be increased.

  In the battery temperature control apparatus 10, when the connection part of the entrance convex part 12 and the heat exchange part 30 was made into the straight line (one-dot chain line of FIG. 4), this straight line and the edge part of the spreading | diffusion part 34 were comprised. . By configuring in this way, the cooling water can be diffused with a simple configuration by only two components of the inlet convex portion 12 and the diffusion portion 34.

  The heat exchanging unit 30 of the battery temperature control apparatus 10 includes a plurality of channel forming units 33 that form channels of cooling water, and at least one of the plurality of channel forming units 33 constitutes the diffusing unit 34. Also with this configuration, the low-temperature cooling water flowing from the inlet convex portion 12 is diffused in the heat exchanging portion 30 near the inlet convex portion 12, so that heat exchange efficiency can be achieved by taking away the heat in this vicinity. The heat exchange efficiency with the battery module 150 can be increased.

  The embodiment of the present invention has been described above, but the above embodiment is merely one example of application of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. is not.

  In the above-described embodiment, the example in which the cooling water is circulated through the battery temperature control device 10 to cool the battery module 150 has been described. However, when the battery module 150 is at a low temperature, the high-temperature cooling water is circulated to The temperature may be raised to increase the charge / discharge efficiency.

  In the said embodiment, although the battery temperature control apparatus 10 with which the battery module 150 with which a vehicle is equipped was demonstrated was demonstrated, it is not restricted to this. It may be provided in a battery module other than the vehicle, or may be provided in a device (for example, an inverter) that generates heat other than the battery.

DESCRIPTION OF SYMBOLS 1 Temperature control apparatus 10 Battery temperature control apparatus 12 Inlet convex part 13 Cooling water inlet 14 Outlet convex part 15 Cooling water outlet 21, 22, 24 Pipe 31 Plate 33 Channel formation part 34 Diffusion part 38 Channel 100 Battery unit 150 Battery module 153 terminal

Claims (4)

A plate-shaped battery temperature control device that controls the temperature of a battery by distributing a medium,
A heat exchange section having a medium flow path;
An inlet convex portion provided with a medium inlet that is formed so as to protrude from the heat exchanging portion and allows a medium to flow into the heat exchanging portion,
An outlet convex portion provided with a medium outlet for projecting the medium from the heat exchanging portion, and being formed protruding from the heat exchanging portion,
The heat exchange part has a diffusion part for diffusing the medium flowing in from the inlet convex part in a direction different from the medium flow from the inlet convex part to the outlet convex part in the heat exchange part. A battery temperature control device. The battery temperature control device according to claim 1,
A battery temperature control characterized in that a cross-sectional area of the inlet channel between the inlet convex portion and the heat exchange unit is formed by the diffusion unit to be smaller than a cross-sectional area of the channel of the heat exchange unit. apparatus. The battery temperature control device according to claim 1 or 2,
The diffusion unit is formed so that a connection part between the inlet projection and the heat exchange unit and one end of the diffusion unit are in contact with each other. It is a battery temperature control apparatus as described in any one of Claim 1 to 3,
The heat exchange section includes a plurality of flow path forming sections that form a flow path of the medium,
At least one of the plurality of flow path forming parts constitutes the diffusion part.

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