JP5428273B2 - Battery temperature control device - Google Patents

Description

  The present invention relates to a technical field of adjusting the temperature of a battery by a temperature adjusting medium.

  2. Description of the Related Art Conventionally, a technique for cooling a battery that has reached a high temperature by blowing air from the cabin to the battery using a blower or the like has been proposed. For example, in Patent Document 1, a plurality of batteries (battery cells) arranged in a case are uniformly provided by providing a rectifying plate alternately arranged with a case-side rectifying plate and a battery-side rectifying plate in a cooling passage. Describes a battery temperature control device for cooling.

JP-A-2005-116342

  On the other hand, when the battery cell is lower than a predetermined target temperature due to the outside air temperature or the like, it is necessary to warm up the battery cell. In this case, among the plurality of arranged battery cells, the battery cells near both ends are likely to be at a lower temperature than the battery cells near the center. Therefore, when warming up the battery, it is necessary to positively (preferentially) warm up battery cells near both ends. However, Patent Document 1 does not discuss the above-described problem at all.

  The present invention has been made to solve the above-described problems, and when warming up, the battery cells arranged at both ends can be preferentially heated over the battery cells arranged at the center. An object of the present invention is to provide a battery temperature control device that can be used.

In one aspect of the present invention, a storage case into which a temperature control medium flows, a plurality of battery cells arranged at a predetermined interval in the storage case, a plurality of flow paths formed in the storage case, One or a plurality of rectifiers for adjusting the flow of the temperature control medium, and control means for controlling the flow direction of the temperature control medium, and adjacent to the central battery cell among the battery cells during warm-up The rectifying unit is arranged so that more of the temperature control medium flows in the flow path adjacent to the battery cells at both ends of the battery cell than the flow path to perform the temperature control medium during cooling and warming up. The flow path is different, the position of the rectifying unit is moved by the flow force of the temperature control medium according to the flow direction, and the control means changes the flow direction between cooling and warming up, The flow path through which the temperature control medium flows To become.

The battery temperature adjusting device is suitably applied to a hybrid vehicle, an electric vehicle, and the like. The battery temperature adjusting device includes a storage case, a battery cell, a flow path, and a rectifying unit. The battery cells are arranged in the storage case at a predetermined interval. The flow path is, for example, a gap formed between the arranged battery cells. The temperature control medium corresponds to, for example, warmed-up air such as a vehicle cabin and other fluid such as water. The rectifying unit is a member that adjusts the flow of the temperature adjusting medium. The rectifying unit corresponds to, for example, a plate-like member or a member that protrudes from the inner wall of the storage case. And at the time of warming-up, a rectification | straightening part is adjacent to the battery cell of both ends (near both ends) among battery cells rather than the flow path adjacent to the battery cell of the center part (near center) among the arranged battery cells. It arrange | positions so that many temperature control media may flow into the flow path. The battery cells at both ends are likely to be colder than the battery cells at the center, and the temperature rise is slow. On the other hand, said battery temperature control apparatus warms up the battery cell of both ends actively (preferentially) by arrange | positioning a rectification | straightening part. Therefore, the battery temperature adjusting device can efficiently raise the temperature of the battery cell.
Furthermore, in the battery temperature adjusting device, the flow path through which the temperature adjusting medium flows is different between cooling and warming up. At the time of warming up, the battery temperature adjusting device needs to warm up the battery cells at both ends at low temperatures preferentially in order to raise the minimum temperature of the battery cells. On the other hand, at the time of cooling, the battery temperature adjusting device needs to preferentially cool the battery cell in the central portion that is at a high temperature. Therefore, the battery temperature adjusting device can appropriately warm up and cool the battery cell by differentiating the flow path through which the temperature adjusting medium flows during warm-up and cooling.
Furthermore, the battery temperature adjusting device further includes a control unit that controls a flow direction of the temperature adjusting medium, and the rectifying unit is moved by a flow force of the temperature adjusting medium according to the flow direction, and the control The means changes the flow direction of the temperature control medium by changing the flow direction between cooling and warming up. The control means is, for example, an ECU (Electronic Control Unit) and controls the flow direction of the temperature control medium. The position of the rectifying unit is moved by the flow force of the temperature control medium according to the flow direction. Then, the control means changes the flow direction of the temperature control medium between cooling and warming up. By doing in this way, the battery temperature control apparatus can change the flow path through which the temperature control medium flows between cooling and warming up.

  In one aspect of the battery temperature adjusting device, the temperature adjusting medium flows in the storage case along a direction in which the battery cells are arranged, and the temperature adjusting medium flows in a flow path adjacent to the battery cell at the end. Among the rectifying units arranged in this manner, the rectifying unit positioned rearward with respect to the inflow direction of the temperature control medium is longer than the rectifying unit positioned forward. Here, the “end battery cell” means one or a plurality of battery cells (first end battery cells) at the position where the temperature control medium reaches first among the arranged battery cells, or the temperature later. One of the battery cells (second end battery cells) at which the adjustment medium reaches is shown. Accordingly, among the plurality of rectification units arranged so that the temperature adjustment medium flows in the flow path adjacent to the battery cell at the first end, the rectification unit positioned rearward with respect to the inflow direction of the temperature adjustment medium is forward. It is longer than the rectification part located. Similarly, among the plurality of rectification units arranged so that the temperature adjustment medium flows in the flow path adjacent to the battery cell at the second end, the rectification unit positioned rearward with respect to the inflow direction of the temperature adjustment medium is the front Longer than the rectifier located at By doing in this way, the battery temperature control apparatus can flow a temperature control medium substantially equally with respect to the flow path adjacent to the battery cell of both ends.

  In another aspect of the battery temperature control device, the rectifying unit is installed at a position that opens and closes a flow path adjacent to the battery cell in the center, and during warm-up, the rectifying unit opens the flow path. Narrow. By doing in this way, the battery temperature control apparatus can flow a temperature control medium more intensively with respect to the flow path adjacent to the battery cell of both ends at the time of warming up.

  In another aspect of the battery temperature control device, the rectifying unit is installed at a position to open and close the flow path adjacent to the battery cell at the center and the flow path adjacent to the battery cell at both ends. In some cases, the rectifying unit narrows the flow path adjacent to the battery cell in the central part, and in cooling, the rectifying part narrows the flow path adjacent to the battery cell in both end parts. In this aspect, the battery temperature control device actively flows the temperature control medium through the flow paths adjacent to the battery cells at both ends by narrowing the flow path adjacent to the battery cells at the center when warming up. Further, when cooling, the battery temperature control device actively flows the temperature control medium through the flow path adjacent to the battery cell in the center by narrowing the flow path adjacent to the battery cell at both ends. By doing so, the battery temperature control device preferentially warms up the battery cells at both ends that tend to be low in the warm-up state, and gives priority to the battery cell in the central part that is likely to become high in the cool-down state. Can be cooled.

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

[First embodiment]
First, a first embodiment of the present invention will be described.

(overall structure)
FIG. 1 is a schematic configuration diagram of a battery temperature adjusting device 100 according to the first embodiment. In addition, the solid line arrow in a figure shows the flow of air, and the broken line arrow has shown the input / output of the signal.

  The battery temperature adjusting device 100 mainly includes an intake passage 1, a blower 2, a battery 3, a battery temperature sensor 4, a storage case 5, an exhaust passage 6, and an ECU 10. The battery temperature adjusting device 100 is mounted on, for example, a hybrid vehicle (HV vehicle) or an electric vehicle (EV vehicle).

  The blower 2 is configured to suck air from the cabin (cabinet) from the suction passage 1 and blow the air to the battery 3. The operation of the blower 2 is controlled by a control signal S1 supplied from the ECU 10. The battery 3 is composed of a secondary battery or the like, and functions as a power source for components in the vehicle. As will be described later, the battery 3 includes a plurality of battery cells connected in series. The battery temperature sensor 4 is a sensor configured to be able to detect the temperature of the battery 3 (battery temperature), and supplies a detection signal S2 corresponding to the detected battery temperature to the ECU 10.

  The storage case 5 is a case for storing the battery 3. The storage case 5 is connected to the suction passage 1 and the exhaust passage 6. A blower 2 is installed on the suction passage 1. The suction passage 1 sends wind generated by driving the blower 2 (hereinafter referred to as “blower wind”) into the storage case 5. The exhaust passage 6 discharges the blower air that warms or cools the battery 3 out of the storage case 5.

  The ECU 10 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like (not shown), and mainly warms the battery 3 by blowing air from the cabin to the battery 3. The blower 2 is controlled so that the machine is operated (that is, the control signal S1 is supplied to the blower 2). In this case, the ECU 10 drives the blower 2 based on the detection signal S2 supplied from the battery temperature sensor 4 as an example.

(Configuration in the storage case)
Next, the configuration in the storage case 5 will be specifically described. FIG. 2 is an example of a top view inside the storage case 5. As shown in FIG. 2, battery cells 3 a to 3 j, a restraining plate 7, and a rectifying plate 11 exist in the storage case 5. Arrows indicate air flow.

  The battery cells 3a to 3j are arranged in the storage case 5 at a predetermined interval in a direction equal to the direction in which the blower air flows from the suction passage 1. That is, the direction in which the battery cells 3a to 3j are arranged is parallel to the blower wind direction. Among the battery cells 3a to 3j, the battery cells (here, the battery cells 3a, 3b, 3i, and 3j) arranged at or near both ends are hereinafter referred to as “battery cells at both ends” and the batteries at both ends. The battery cells (in this case, battery cells 3c to 3h) arranged on the inner side (center side) than the cells are hereinafter referred to as “central battery cells”.

  A channel 9ab through which air can flow is formed between the battery cell 3a and the battery cell 3b. Similarly, flow paths 9bc to 9ij are formed between the battery cells 3b to 3j. Hereinafter, the flow paths adjacent to the battery cells at both ends (here, the flow paths 9ab, 9bc, 9hi, 9ij) are hereinafter referred to as “flow paths at both ends” and are not adjacent to the battery cells at both ends. The flow path adjacent to the central battery cell (here, the flow paths 9cd to 9gh) is hereinafter referred to as a “central flow path”.

  The restraint plate 7 is a member that fixes the positions of the battery cells 3a to 3j. The restraint plate 7 is fixed in the storage case 5. The restraint plate 7 is fixed so as to sandwich the battery 3 with a metallic band or the like not shown in FIG. A specific example of this form will be described with reference to FIG. FIG. 3 is an example of a perspective view of the battery cells 3 a to 3 j fixed by the restraint plate 7. As shown in FIG. 3, the battery cells 3 a to 3 j are fixed by a metal band 7 x so as to be sandwiched between two restraint plates 7. In other words, the metal band 7x is wound around the outer periphery so that the restraint plate 7 and the battery cells 3a to 3j are tied together.

  The rectifying plate 11 is a plate (plate) that adjusts the direction of the wind. In the present embodiment, the rectifying plate 11 is disposed at a position where one end is fixed to the storage case 5 and a blower air can be supplied to the flow path 9ab. That is, the rectifying plate 11a has an unfixed end portion directed toward the flow path 9ab.

  Similarly, the rectifying plate 11b is disposed at a position where the blower air can be supplied to the flow path 9bc, the rectifying plate 11c is disposed at a position where the blower air can be supplied to the flow path 9hi, and the rectifying plate 11d is 9ij is arranged at a position where blower air can be supplied. That is, the rectifying plates 11a to 11d are arranged so as to actively (priorly) supply blower air to the flow paths 9ab, 9bc, 9hi, and 9ij at both ends of the flow paths 9ab to 9ij.

  By doing in this way, the battery temperature control apparatus 100 can warm up the battery cells 3a, 3b, 3i, and 3j at both ends more preferentially than the battery cells 3c to 3h at the center. I will supplement this. FIG. 4 shows the relationship between battery cell numbers (cell numbers) and battery cell temperatures (cell temperatures) for the 28 battery cells numbered in the order of arrangement. In FIG. 4, the battery 3 is heated until the lowest temperature (hereinafter referred to as “the lowest temperature of the battery cell”) among the temperatures of the respective battery cells is changed from −30 ° C. to −10 ° C. As shown in FIG. 4, the temperature rise of the battery cells at both ends is slower than the temperature rise of the battery cells at the center. In general, the input / output performance (charge and discharge performance) of battery cells connected in series at a low temperature is affected by the minimum temperature of the battery cells. Therefore, the battery temperature control apparatus 100 efficiently warms the minimum temperature of the battery cells by preferentially warming up the battery cells at both ends over the battery cells at the center, and the input / output performance of the battery cells. Can be improved.

  Next, the structure of the current plate 11 will be described with reference to FIGS. Hereinafter, one or a plurality of battery cells (herein, battery cells 3a and 3b) at the position where the blower wind reaches first among the battery cells at both ends are referred to as “first end battery cells”. One or a plurality of battery cells (herein, battery cells 3i and 3j) at a position where the blower wind reaches later will be referred to as “second end battery cells”.

  As shown in FIG. 2, the flow direction of the blower air (indicated by the arrow in FIG. 2) among the rectifying plates 11 a and 11 b arranged so that the blower air flows in the flow paths adjacent to the battery cells 3 a and 3 b at the first end. The rear straightening plate 11b is longer than the front straightening plate 11a. More specifically, the rectifying plate 11b is a distance Lb (hereinafter referred to as “the rectifying plate of the rectifying plate”) between the end (end line) fixed by the storage case 5 and the end (end line) opposite to the end. Is called “length”) longer than the length La of the current plate 11a. In other words, the radius of the circle (fan shape) formed by the movable range of the rectifying plate 11a is smaller than the radius of the circle formed by the movable range of the rectifying plate 11b. Thereby, the baffle plate 11b can flow the blower wind which passed through the baffle plate 11a to the flow path 9bc. In other words, the battery temperature adjusting device 100 appropriately sets the length La of the rectifying plate 11a and the length Lb of the rectifying plate 11b, so that the amount of blower air flowing in the flow path 9ab and the blower flowing in the flow path 9bc are set. The wind volume can be adjusted. Note that the relationship between the length of the rectifying plates 11a and 11b and the amount of air flowing through the flow paths 9ab and 9bc is derived, for example, experimentally or theoretically.

  Similarly, of the rectifying plates 11c and 11d arranged so that the blower air flows in the flow path adjacent to the battery cells 3i and 3j at the second end, the length of the rectifying plate 11d behind the inflow direction of the blower air The length is longer than the length of the front rectifying plate 11c. Thereby, the battery temperature control apparatus 100 can make a blower wind flow to the flow path 9hi and the flow path 9ij.

  Thus, by providing a difference in the length of the rectifying plates 11a to 11d, the battery temperature adjusting device 100 can preferentially flow the blower air through the flow paths 9ab, 9bc, 9hi, 9ij at both ends, The battery cells 3a, 3b, 3i, and 3j at both ends can be preferentially warmed up. In addition, the battery temperature control apparatus 100 may warm up more actively the battery cell located in an end (outside) among the battery cells of both ends by adjusting the length of the rectifying plates 11a to 11d. Specifically, the battery temperature adjusting device 100 maximizes the blower airflow flowing in the flow paths 9ab and 9ij existing at the end, and the blower airflow flowing in the flow paths 9bc and 9hi is changed to the flow paths 9ab and 9hi. It is smaller than the amount of blower air flowing in 9ij and larger than the flow paths 9cd to 9gh in the central portion.

  In the present embodiment, the rectifying plate 11 is movable. Thereby, when it is not necessary to warm up the battery cells at both ends at the time of cooling or the like, unnecessary pressure loss of the blower wind caused by the rectifying plate 11 can be prevented. This will be described with reference to FIG. Fig.5 (a) shows an example of the enlarged view of the baffle plate 11a. As shown in FIG. 5A, the rectifying plate 11a has a fixed end portion 11ax, and the end portion 11ay on the opposite side moves around the end portion 11ax so as to draw an arc (in a circular shape). be able to. A stopper 12 for restricting the movement of the rectifying plate 11a is fixed to the storage case 5 in the vicinity of the rectifying plate 11a. Therefore, the movable range of the rectifying plate 11 a is limited by the stopper 12. In the present embodiment, the positions of the rectifying plates 11a to 11d vary depending on the wind force. Accordingly, the rectifying plate 11a is present at the position of the broken line 11x, for example, in a state where the blower 2 is not operating.

  Furthermore, since the baffle plate 11a moves from the position of the broken line 11x to the position in contact with the stopper 12 by the blower wind, the end plate 11ay may be bent so that it rises. FIG.5 (b) shows an example in case the baffle plate 11a has the bent end part 11ay. When the end portion 11ay is bent, the rectifying plate 11a has a larger area for receiving the blower air flowing from the suction passage 1 even when it is in a lying state as shown in FIG. Thereby, the baffle plate 11a can move to the position which contacts the stopper 12 with the wind power of a blower wind. Instead, the rectifying plate 11 may be electrically driven. In this case, the rectifying plate 11 is electrically connected to the ECU 10 and rotates around the end portion 11ax based on a control signal from the ECU 10.

  Next, the effect in this embodiment is supplemented. As shown in FIG. 2, when the suction passage 1 intersects the flow path adjacent to the battery cell, the blower air supplied from the suction passage 1 is the first end in the state where the rectifying plate 11 is not installed. It is particularly difficult to flow into the flow paths (here, the flow paths 9ab and 9bc) adjacent to the battery cells. Therefore, in this case, the battery cell at the first end is likely to be at a lower temperature than the other battery cells even during warm-up when the blower 2 is driven. On the other hand, the battery temperature control apparatus 100 according to the first embodiment is provided with the rectifying plates 11a and 11b, and by appropriately setting the length of the rectifying plates, the blower air is positively applied to the flow paths 9ab and 9bc. The battery cell at the first end is warmed up preferentially over the battery cell at the center. Thereby, the battery temperature control apparatus 100 can raise the minimum temperature of a battery cell efficiently, and can improve the input / output performance of a battery cell.

  Note that the configuration of the battery temperature adjusting device 100 shown in FIG. 2 is an example, and the configuration to which the present invention is applicable is not necessarily limited thereto. For example, the battery 3 is composed of 10 battery cells 3a to 3j, but may be composed of more or fewer battery cells. In addition, the number of rectifying plates 11 installed may be changed based on the total number of battery cells included in the battery 3. For example, in the present embodiment, four rectifying plates 11 are arranged. However, the present invention is not limited to this, and two rectifying plates 11 capable of supplying blower air to the flow channel 9cd and the flow channel 9gh may be separately arranged. In this case, the length of the current plate 11 newly installed on the battery cell side of the first end is set to be longer than the length Lb of the current plate 11b. Then, for example, the battery temperature control apparatus 100 maximizes the blower air volume flowing in the flow paths 9ab and 9ij existing at the end, and next increases the blower air volume flowing in the flow paths 9bc and 9hi. The air volume of the blower air flowing through the passages 9cd and 9gh is less than the air volume of the blower air flowing through the flow paths 9bc and 9hi and larger than the air volume of the blower air flowing through the flow paths 9de to 9fg.

(Modification)
In the above-described embodiment, the battery temperature adjusting device 100 generates wind that warms up the battery 3 by the blower 2 using the air of the cabin. However, the configuration to which the present invention can be applied is not limited to this. For example, the battery temperature adjustment device 100 may warm up the battery 3 with a fluid such as liquid (water). In this case, a pump or the like is installed instead of the blower 2. And the battery temperature control apparatus 100 can flow a fluid preferentially to the flow path of both ends by installing the baffle plate 11 similarly to the above-mentioned embodiment. This modification can also be applied to the following embodiments.

[Second Embodiment]
In the above-described embodiment, the blower wind is preferentially caused to flow through the flow passages at both ends rather than through the flow passage at the central portion by installing the rectifying plate 11 in the vicinity of the flow passages at both ends. On the other hand, in the second embodiment, the battery temperature control device 100 is provided with a flow path at both ends by installing a current plate (hereinafter referred to as “wind shield plate”) that closes the flow path at the center. It is possible to promote the blower wind.

  Fig.6 (a) is an example of the top view in the storage case 5 in 2nd Embodiment. As shown in FIG. 6A, in the battery temperature adjusting device 100, in addition to the rectifying plate 11, a plurality of wind shielding plates 13 are installed in the storage case 5. The wind shielding plate 13 is installed so as to block the central flow path. Specifically, in FIG. 6A, the wind shield plate 13a is installed so as to block the flow path 9cd, the wind shield plate 13b is installed so as to block the flow path 9de, and the wind shield plate 13c is The windshield plate 13d is installed so as to block the flow path 9ef, the wind shield plate 13d is installed so as to block the flow path 9fg, and the wind shield plate 13e is installed so as to block the flow path 9gh. By doing so, the battery temperature adjusting device 100 has more blowers in the flow paths 9ab, 9bc, 9hi, and 9ij that are flow paths at both ends because the blower air does not flow through the flow paths 9cd to 9gh in the center. Can send wind. Therefore, the battery temperature control apparatus 100 can warm up the battery cells at both ends more positively.

  In the present embodiment, the wind shielding plate 13 is movable like the rectifying plate 11. Specifically, the wind shield plate 13 has an end portion fixed to the battery cell, and the end on the opposite side is rotatable in a circular shape (as in an arc) around the fixed end portion. is there.

  FIG. 6B is an enlarged view of the vicinity of the wind shielding plates 13a and 13b. As shown in FIG. 6B, at the time of warming up, the wind shielding plate 13a moves from the position of the broken line 13ax so as to block the flow path 9cd. Similarly, the wind shielding plate 13b moves from the position of the broken line 13bx to a position that closes the flow path 9de. As with the rectifying plate 11, the position of the wind shielding plate 13 varies depending on the blower wind force. Instead, the rectifying plate 11 may be an electric type, and may be configured to rotate based on a control signal from the ECU 10. Thus, by making the wind shielding plate 13 movable, the battery temperature adjusting device 100 can prevent the flow path from being unnecessarily blocked.

[Third embodiment]
In the above-described embodiment, in order to positively heat the battery cells at both ends, the rectifying plate 11 and the wind shielding plate 13 are installed so that the blower air flows through the flow paths at both ends. However, when the battery 3 is heated, the battery 3 needs to be cooled. In this case, since the temperature of the battery cell at the center is higher, it is necessary to send the blower air preferentially to the channel at the center than to the channel at both ends. Therefore, in the third embodiment, the battery temperature adjusting device 100 includes the wind-type rectifying plate 11 and the wind shielding plate 13 and changes the flow direction of the blower air during warm-up and during cooling. Thereby, the battery temperature control apparatus 100 performs both warming up and cooling of the battery 3 appropriately by changing the flow path through which the blower air flows between warming up and cooling.

  FIG. 7 is an example of a top view inside the storage case 5 in the third embodiment. Specifically, FIG. 7A shows a state in the storage case 5 during warm-up, and FIG. 7B shows a state in the storage case 5 when the battery 3 is cooled.

  As shown in FIG. 7A and FIG. 7B, the current plate 11 and the wind shielding plate 13 are arranged in the storage case 5 in the same manner as in FIG. 6A. The position of the rectifying plate 11 and the wind shielding plate 13 varies depending on the blower wind. Specifically, the blower 2 causes the blower air to flow from the suction passage 1 to the storage case 5 during warm-up based on the control of the ECU 10. The rotation direction (propeller) of the blower 2 at this time is hereinafter referred to as “forward rotation”. At this time, the flow direction of the blower wind is a direction from the suction passage 1 to the exhaust passage 6. And the baffle plate 11 moves to the position which contacts the stopper 12 according to the flow direction of a blower wind. And the wind-shielding plate 13 moves to the position which block | closes the flow path of a center part according to the flow direction of blower wind. That is, the battery temperature adjusting device 100 is in a state as shown in FIG. 7A due to the blower wind force (fluid force) by rotating the blower 2 forward. Thereby, since the blower wind concentrates and flows in the flow paths 9ab, 9bc, 9hi, 9ij at both ends, the battery temperature control device 100 can preferentially warm up the battery cells at both ends where the temperature rises slowly. it can.

  On the other hand, during cooling, the blower 2 is controlled by the ECU 10 so that the propeller rotates in the opposite direction to the normal rotation (hereinafter referred to as “reverse rotation”). That is, the blower 2 rotates in the reverse direction so that the wind direction from the storage case 5 to the suction passage 1 is generated. As a result, the flow direction of the blower air during cooling is different from the flow direction of the blower air during warm-up. And the baffle plate 11 transfers to the state which left | separated from the stopper 12 and lay in the storage case 5 according to the flow direction of a blower wind. And the wind shielding plate 13 rotates about 180 degree | times so that it may face the side surface of a battery cell according to the flow direction of a blower wind. That is, the battery temperature control apparatus 100 shifts to a state as shown in FIG. By doing so, the blower air flows to the flow paths 9ab to 9ij during cooling. That is, the flow path through which the blower air flows differs between warm-up and cooling, and includes a central flow path. Therefore, the battery temperature adjusting device 100 can also cool the battery cells 3c to 3h in the center when cooling.

  As described above, the battery temperature control device 100 uses the rectifying plate 11 and the wind shielding plate 13 as a wind type, and changes the flow direction of the blower air between warming up and cooling, thereby warming up and cooling down. The flow path through which the blower air flows can be made different. Thereby, the battery temperature control apparatus 100 can appropriately perform both warming up and cooling of the battery 3. In addition, instead of rotating the blower 2 reversely during cooling, the battery temperature adjusting device 100 may be provided with a separate blower in the exhaust passage 6 and driven based on the control of the ECU 10 during cooling. Also by this, the battery temperature control apparatus 100 can change the flow direction of the blower air between cooling and warming up.

[Fourth embodiment]
In the third embodiment, the battery temperature adjusting device 100 performs the cooling of the battery 3 by rotating the blower 2 in the reverse direction and changing the flow direction of the blower air from that during warm-up. On the other hand, the battery temperature adjusting device 100 of the fourth embodiment generates a stronger blower wind than the reverse rotation by rotating the blower 2 forward during cooling, and electrically moves the rectifying plate. As a result, the blower air is preferentially passed through the flow path in the center.

  FIG. 8 is an example of a top view inside the storage plate 5 in the fourth embodiment. More specifically, FIG. 8A shows a configuration in the storage plate 5 during warm-up, and FIG. 8B shows a configuration in the storage plate 5 during cooling. 8A and 8B, the battery temperature adjusting device 100 includes rectifying plates 15ab to 15ij installed on the battery cells 3a to 3j. The rectifying plates 15ab to 15ij are electric plates that can operate around the ends fixed to the battery cells, and adjust the flow of blower air flowing through the flow paths 9ab to 9ij. Hereinafter, the state where the rectifying plates 15ab to 15ij block the flow paths 9ab to 9ij is expressed as “the state where the rectifying plates close the flow paths”, and the rectifying plates 15ab to 15ij are arranged in a predetermined direction with respect to the direction in which the battery cells are arranged. An angle (for example, 30 degrees to 90 degrees) is formed, and a state where blower air can flow into the flow paths 9ab to 9ij is expressed as “a state where the flow straightening plate opens the flow path”.

  In the present embodiment, the rectifying plates 15ab to 15ij operate based on the control of the ECU 10. A specific example of this mechanism will be described below. The battery temperature adjusting device 100 includes a first actuator 20 and a second actuator 21. The first actuator 20 includes rectifying plates 15cd, 15de, 15ef, 15fg, and 15gh (hereinafter, referred to as “first plate group”) for controlling the opening and closing of the flow path in the center, and a connecting portion. Connect via 20x. Similarly, the second actuator 21 includes rectifying plates 15ab, 15bc, 15hi, and 15ij (hereinafter, referred to as “second plate group”) for controlling the opening and closing of the flow paths at both ends, and a connecting portion 21x. Connect through. The first actuator 20 controls the opening and closing of the first plate group based on a control signal from the ECU 10. The first actuator 20 opens and closes the first plate group by, for example, the same principle as a blind shutter by pushing and pulling the connection portion 20x. Similarly, the second actuator 21 controls opening and closing of the second plate group based on a control signal from the ECU 10.

  And as shown to Fig.8 (a), at the time of warming-up, the 1st actuator 20 each closes the 1st plate group so that the flow path of a center part may be block | closed. During warm-up, the second actuator 21 opens the second plate group so that the blower air flows through the flow paths at both ends. By doing so, the blower air flows in a concentrated manner in the flow paths at both ends during warm-up. Accordingly, the battery temperature adjusting device 100 can warm up the battery cells 3a to 3c and 3h to 3j at both ends at particularly low temperatures in preference to the battery cells 3d to 3g at the center.

  On the other hand, as shown in FIG. 8B, at the time of cooling, the first actuator 20 opens the first plate group so that the blower air flows through the central flow path. During cooling, the second actuator 21 closes the second plate group so as to block the flow paths at both ends. By doing so, the blower air flows in a concentrated manner in the flow path in the central part during cooling. That is, the flow path through which the blower air flows during cooling is different from the flow path through which the blower air flows during warm-up. Accordingly, the battery temperature adjusting device 100 gives priority to the battery cells 3c to 3h in the central portion, which is higher than the appropriate temperature (target temperature at the time of cooling), especially over the battery cells 3a, 3b, 3i, and 3j at both ends. Can be cooled.

  Note that the battery temperature adjusting device 100 may change the opening / closing amounts of the rectifying plates 15ab to 15ij step by step. In this case, at the time of warming up, the battery temperature adjusting device 100 does not completely close the rectifying plates 15cd and 15gh, for example, moves them to an intermediate state between the open state and the closed state, and further moves the rectifying plates 15de and 15fg to the above-described state. To an intermediate state between the intermediate state and the closed state. By doing in this way, the battery temperature control apparatus 100 warms up the battery cells 3e and 3f located at the center weakest and warms up the battery cells 3a and 3j located at both ends most strongly. It is possible to gradually increase the blower air volume from the channel 9ef located at the end to the channels 9ab and 9ij located at the end. That is, the battery temperature adjusting device 100 can warm up the battery cells 3a and 3j located at both ends to the battery cells 3e and 3f located in the center in a stepwise manner. Similarly, at the time of cooling, the battery temperature adjusting device 100 gradually changes the state from the rectifying plate 15ef to the rectifying plate 15ab and from the rectifying plate 15ef to the rectifying plate 15ij in an open state, a closed state, and an intermediate state thereof. . Thereby, the battery temperature control apparatus 100 cools the battery cells 3e and 3f located in the center most preferentially, and the battery cells located in the center so as to weaken the cooling of the battery cells 3a and 3j located at both ends most. The battery cells 3a and 3j located at both ends from 3e and 3f can be cooled stepwise.

[Fifth Embodiment]
In the fourth embodiment, the battery temperature adjusting device 100 adjusts the opening and closing of the rectifying plates 15ab to 15ij by a plurality of actuators. On the other hand, the battery temperature control apparatus 100 according to the fifth embodiment includes a rectifying plate that has hollow windows that are hollowed out (penetrated) at a predetermined interval and that can slide parallel to the direction in which the battery cells are arranged. Install one along the line. Thereby, the battery temperature control apparatus 100 opens and closes a flow path using only one actuator, and adjusts the air volume of each flow path.

  FIG. 9 is an example of a top view inside the storage plate 5 in the fifth embodiment. Specifically, FIG. 9A shows the state in the storage plate 5 during warm-up, and FIG. 9B shows the state in the storage plate 5 during cooling. As shown in FIG. 9A, a sliding plate 30 is disposed in the storage case 5. The slide plate 30 is a rectifying plate for adjusting the opening and closing of the flow paths 9ab to 9ij. The sliding plate 30 is connected to the actuator 22. The actuator 22 pushes and pulls the sliding plate 30 in parallel with the battery cell arrangement direction based on the control signal of the ECU 10.

  FIG. 10 is a side view of the sliding plate 30 shown in FIG. Specifically, FIG. 10 (a) corresponds to FIG. 9 (a), and FIG. 10 (b) corresponds to FIG. 9 (b). As shown in FIGS. 10A and 10B, the sliding plate 30 has a plurality of punched windows (hollow portions) 30x. And as shown to Fig.9 (a) and FIG.10 (a), at the time of warming-up, the window 30x of the slide-type plate 30 and the flow paths 9ab, 9bc, 9hi, 9ij have overlapped. That is, the battery temperature control apparatus 100 according to the fifth embodiment is configured such that blower air can flow into the flow paths at both ends during warm-up. During warm-up, the central flow paths 9cd to 9gh are shielded by the slide plate 30. As described above, the battery temperature control apparatus 100 according to the fifth embodiment can flow the blower air through the flow passages at both ends during warm-up, and can actively warm up the battery cells at both ends. Is possible.

  On the other hand, as shown in FIGS. 9 (b) and 10 (b), during cooling, the slide plate 30 is pushed toward the suction passage 1 by the actuator 22. As a result, the relative positions of the sliding plate 30, the battery cells 3a to 3j, and the flow paths 9ab to 9ij change. Specifically, the window 30x and the flow paths 9bc to 9gh overlap during cooling. That is, the battery temperature control apparatus 100 according to the fifth embodiment is configured such that blower air can flow into the flow path at the center when cooling. A part of the flow paths 9ab, 9hi, 9ij, 9bc and a part of 9gh at both ends are shielded by the sliding plate 30. As described above, the battery temperature adjusting device 100 according to the fifth embodiment can flow the blower air through the flow path in the central portion during cooling, and can actively cool the battery cells in the central portion. is there.

  Note that the position of the slide plate 30 during cooling or warm-up is not limited to the cases of FIGS. For example, by moving the sliding plate 30 by a minute amount from the positions of FIGS. 9A and 10A, the flow path in the center is not completely blocked even during warm-up. That is, the battery temperature control device 100 can warm up the battery cells at the center while preferentially warming up the battery cells at both ends during warming up. Similarly, at the time of cooling, the battery temperature control device 100 preferentially cools the battery cell in the center by shifting the sliding plate 30 by a minute amount from the position of FIG. 9B and FIG. 10B. However, the battery cells at both ends can also be cooled.

  As described above, the battery temperature adjusting apparatus 100 according to the fifth embodiment can adjust the flow path through which the blower air flows by sliding the sliding plate 30 based on the control of the ECU 10. Specifically, the battery temperature control apparatus 100 can distribute the blower air to the flow paths at both ends when warming up, and can distribute the blower air to the flow path at the center during cooling. Therefore, the battery temperature adjusting device 100 can flow the blower air to an appropriate flow path in each case of warming up and cooling.

It is a figure which shows schematic structure of a battery temperature control apparatus. It is an example of the top view in the storage case of the battery temperature control apparatus which concerns on 1st Embodiment. It is an example of the perspective view of the battery cell fixed by the restraint plate. It is a graph which shows the relationship between the array number of a battery cell, and the cell temperature corresponding to it. It is the figure which expanded the vicinity of the baffle plate. It is an example of the top view in the storage case of the battery temperature control apparatus which concerns on 2nd Embodiment. It is an example of the top view in the storage case of the battery temperature control apparatus which concerns on 3rd Embodiment. It is an example of the top view in the storage case of the battery temperature control apparatus which concerns on 4th Embodiment. It is an example of the top view in the storage case of the battery temperature control apparatus which concerns on 5th Embodiment. It is an example of the side view of the slide type plate concerning a 5th embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intake passage 2 Blower 3 Battery 4 Battery temperature sensor 5 Storage case 6 Exhaust passage 11, 15 Current plate 12 Stopper 13 Wind-shield plate 20, 21, 22 Actuator 30 Slide type plate

Claims (4)

A storage case into which the temperature control medium flows, and
A plurality of battery cells arranged at predetermined intervals in the storage case;
A plurality of flow paths formed in the storage case;
One or more rectifiers for adjusting the flow of the temperature control medium;
Control means for controlling the flow direction of the temperature control medium;
With
In the warm-up, the rectifying unit is configured such that more temperature control medium flows in the flow path adjacent to the battery cells at both ends of the battery cells than in the flow path adjacent to the battery cells in the center of the battery cells. Is placed ,
The flow path through which the temperature control medium flows differs between cooling and warming up,
The position of the rectifying unit is moved by the flow force of the temperature control medium according to the flow direction,
The battery temperature control device according to claim 1, wherein the control means changes the flow direction between cooling and warm-up to change the flow path through which the temperature control medium flows . In the storage case, the temperature control medium flows along the direction in which the battery cells are arranged,
Of the rectification units arranged so that the temperature control medium flows in the flow path adjacent to the battery cell at the end, the rectification unit positioned rearward with respect to the inflow direction of the temperature control medium is the rectification unit positioned forward The battery temperature control apparatus of Claim 1 longer than this. The rectification unit is installed at a position to open and close the flow path adjacent to the battery cell in the center,
The battery temperature adjusting device according to claim 1, wherein the rectifying unit narrows the flow path during warm-up. The rectification unit is installed at a position to open and close the flow path adjacent to the battery cell at the center and the flow path adjacent to the battery cell at both ends,
2. The battery temperature adjusting device according to claim 1, wherein the rectifying unit narrows a flow path adjacent to the battery cell in the central part during warm-up and narrows a flow path adjacent to the battery cell at both ends during cooling.

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