JP6769175B2 - Battery unit - Google Patents

Description

The present invention relates to a battery cell and a battery unit including a cooler.

Conventionally, as a battery unit, there is one described in Patent Document 1. In this battery unit, a group of battery modules is configured by stacking a plurality of battery modules and housed in a case. In addition, the water jacket is attached to the lower wall of the case from the outside. Further, the gel is arranged between the battery module group and the water jacket, and heat exchange between the battery module group and the water jacket is performed via the gel.

Japanese Unexamined Patent Publication No. 2014-093245 (Fig. 2)

In the battery unit of Patent Document 1, there is no means for bringing the battery module group into close contact with the gel or a means for bringing the water jacket into close contact with the gel. Therefore, there is a possibility that a gap may be generated between the battery module group and the water jacket, and the battery module group may not be efficiently cooled by the gap.

An object of the present invention is to provide a battery unit capable of stably maintaining a state in which a battery cell and a cooler are in close contact with each other and efficiently cooling the battery cell with a cooler.

The battery unit according to the present invention includes a battery cell, a cooler provided under the battery cell, an urging member for pressing the cooler against the battery cell, the battery cell, the cooler, and the attachment. The battery pack case comprises a battery pack case in which the force member is stored, and a holding member that is attached to the battery pack case and presses the battery cell from above so that the battery cell does not move upward . The upper side in the height direction opens, the holding member is fixed to the upper part of the battery pack case, and the lean hose crossing the opening of the battery pack case and the lean hose from the lower side in the height direction. It has a resin holder extending downward in the height direction, and the resin holder has a locking portion that locks on the upper surface of the battery cell and presses the upper surface of the battery cell downward. you.

According to the battery unit according to the present invention, the battery cell and the cooler are closely packed by the urging member that presses the cooler against the battery cell and the pressing member that presses the battery cell from above so that the battery cell does not move upward. The state of contact can be stably maintained. Therefore, the heat conduction between the cooler and the battery cell becomes good, and the battery cell can be efficiently cooled by the cooler.

It is a figure when a part in the battery unit which concerns on one Embodiment of this invention is seen from the side. It is a schematic plan view when the battery unit is seen from above. It is a figure for demonstrating the urging operation which a leaf spring presses a cooler against a battery stack.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. It is assumed from the beginning that a new embodiment is constructed by appropriately combining the feature portions of the embodiment and the modified example described below.

FIG. 1 is a view of a part of the battery unit 50 according to the embodiment of the present invention when viewed from the side, and FIG. 2 is a schematic plan view of the battery unit 50 when viewed from above. .. Further, FIG. 3 is a diagram for explaining an urging operation in which the leaf spring 3 described below presses the cooler 2 against the battery stack 1.

In FIG. 1, only the battery pack case 5 of the battery unit 50 is shown in cross section so that the internal configuration of the battery unit 50 can be easily understood. Further, in FIG. 2, the battery stack 1 shows only the outline of the upper surface, the electrodes and the bus bar on the upper surface of the battery stack 1 are not shown, and the resin holders 62 and 63 described below are also omitted. Further, in the following description, the X direction is the longitudinal direction of the battery unit 50 and the stacking direction of the battery cells 10. Further, the Y direction is the width direction (short method) of the battery unit 50, and is a direction orthogonal to the stacking direction. The Z direction is the height direction of the battery unit 50.

As shown in FIG. 1, the battery unit 50 includes a plurality of battery stacks 1, a plurality of coolers 2, a plurality of leaf springs 3, a battery pack case 5, and a holding member 6. The leaf spring 3 is an example of an urging member. As shown in FIG. 2, a plurality of battery stacks 1 are arranged at intervals in the Y direction, and each battery stack 1 has a plurality of battery cells 10 stacked in the X direction. Each battery cell 10 includes a secondary battery (chargeable / dischargeable battery, for example, a lithium ion battery or a nickel metal hydride battery). As shown in FIG. 1, each battery cell 10 is provided with a positive electrode 11 and a negative electrode 12 projecting upward in the Z direction from the upper surface of the battery cell 10.

A plurality of battery cells 10 included in the battery stack 1 are connected in series, for example. In this case, regarding two battery cells 10 adjacent to each other in the X direction, a plate-shaped bus bar (not shown) in which the positive electrode 11 of one battery cell 10 and the negative electrode 12 of the other battery cell are made of a conductive material. It is electrically connected. Male threads are provided on the side surfaces of the positive electrode 11 and the negative electrode 12, and two electrode mounting through holes are provided in the bus bar. After passing one electrode mounting through hole of the bus bar through the positive electrode 11 of one battery cell 10, tighten it from above with a nut (not shown), and make the other electrode mounting through hole of the bus bar the other battery cell 10. After passing through the negative electrode 12 of the above, tighten it from above with a nut. In this way, the bus bar is attached to the positive electrode 11 of one battery cell 10 and the negative electrode 12 of the other battery cell 10, and the positive electrode 11 of one battery cell 10 and the negative electrode 12 of the other battery cell 10 are electrically connected. To do.

Note that at least one battery stack may include a plurality of battery cells connected in parallel. Further, the battery cell 10 may be composed of one cell (a cell of a secondary battery), or may include a plurality of cell cells (a cell of a secondary battery) connected in parallel or in series. Further, although not described in detail, as shown in FIG. 2, the battery unit 50 includes the device 21. The device 21 is electrically connected to each battery stack 1. The device 21 includes a voltage sensor that detects the voltage of the battery stack 1, a current sensor that detects the current of the battery stack 1, a temperature sensor that detects the temperature of the battery stack 1, and the battery stack 1 based on information from these sensors. Includes a control device that monitors the status of.

As shown in FIG. 1, the cooler 2 includes a water jacket 25 and a cooling mechanism (not shown), the water jacket 25 has a flat shape, and the upper surface of the water jacket 25 is in close contact with the lower surface of the battery stack 1. Contact in the state. The configuration in which the upper surface of the water jacket 25 is brought into close contact with the lower surface of the battery stack 1 will be described in detail later. The water jacket 25 has a length in the X direction substantially equal to the length in the X direction of the battery stack 1, and is in close contact with the battery stack 1 from one end to the other end in the X direction of the battery stack 1. Although not described in detail because it has a known structure, the cooler 2 cools the battery stack 1 as shown below, for example.

Specifically, the water jacket 25 is incorporated into a line filled with water, and the sealed water circulates in the line by a pump. The cooling mechanism includes a heat pump type chiller (a device for producing cold water using a heat pump). The heat pump type chiller is equipped with a chilled water generator, and the chilled water generator is incorporated in the above line. This cold water generator exchanges heat between the water circulating in the line and the extremely low temperature liquid refrigerant generated by the vehicle air conditioning system.

Vehicle air conditioning systems include compressors, condensers, and evaporators. The refrigerant is compressed by the compressor and the temperature rises. The refrigerant whose temperature has risen exchanges heat with the outside air in the condenser, and the temperature drops to liquefy. Cold water is generated by heat exchange of the liquefied and cryogenic refrigerant with the above-mentioned water in the cold water generator. The cold water generated by the cold water generator is supplied into the water jacket 25, and the cold water absorbs the heat of the battery stack 1 to cool the battery stack 1. In this example, the case where cold water is supplied to the water jacket 25 has been described, but the battery stack may be cooled by supplying a cold refrigerant (fluid) other than water into the jacket.

The leaf spring 3 is a metal spring, one for each battery cell 10 is provided on the lower side of the battery cell 10, and more specifically, the leaf spring 3 is arranged on the lower side of the water jacket 25. As shown in FIG. 3, the leaf spring 3 has a flat plate-shaped pressing portion 3a extending in the Y direction, and the pressing portion 3a is arranged so as to extend in the Y direction. The leaf spring 3 vertically bisects the pressing portion 3a and is substantially plane-symmetric with respect to the vertical bisector including the Z direction. In addition to the pressing portion 3a, the leaf spring 3 has a first diagonally lower extending portion 3b, an oblique upper extending portion 3c, a second diagonally lower extending portion 3d, and a flat plate-shaped mounting portion 3e.

Since the leaf spring 3 has the above-mentioned plane-symmetrical structure, if only the structure of the pressing portion on one side in the Y direction is described, the first diagonally lower extending portion 3b is the end portion of the pressing portion 3a on one side in the Y direction. It extends diagonally downward from one side in the Y direction and downward in the Z direction. Further, the diagonally upper extending portion 3c extends diagonally upward from the end of the first diagonally lower extending portion 3b on one side in the Y direction to one side in the Y direction and upward in the Z direction, and extends diagonally upward on the second diagonally lower side. The extending portion 3d extends diagonally downward from the end portion of the diagonally upper extending portion 3c on one side in the Y direction to one side in the Y direction and downward in the Z direction. Further, the flat plate-shaped mounting portion 3e extends in a direction parallel to the Y direction from one end of the second diagonally lower extending portion 3d in the Y direction.

With reference to FIG. 1 again, the heat insulating material 33 is spread below the cooler 2 in the lower space inside the battery pack case 5. The heat insulating material 33 is provided with a spring passage hole 31 through which a part of the leaf spring 3 passes around the installation location of the leaf spring 3. The heat insulating material 33 is provided to suppress the radiant heat from the lower surface of the battery pack case from being transmitted to the water jacket 25, and is also used for positioning the leaf spring 3. The leaf spring 3 is provided by the heat insulating material 33 of the battery unit 50. It is attached to the lower side in the Z direction.

Specifically, the heat insulating material 33 has a pressing portion supporting portion 41 and a spring fixing portion 42. The pressing portion support portion 41 has a rectangular shape in FIG. 1, and the back surface (lower surface in the Z direction) of the pressing portion support portion 41 is attached in close contact with the bottom surface of the battery pack case. On the other hand, the spring fixing portions 42 are arranged on both sides of each pressing portion supporting portion 41 in the Y direction. The spring fixing portion 42 is attached so as to form a gap in the Z direction with respect to the bottom of the battery pack case. Specifically, the spring fixing portion 42 includes two end-side fixing portions 42a provided at both ends in the Y direction of the battery pack case and an inner fixing portion 42b provided between the two end-side fixing portions 42a in the Y direction. including. Further, the bottom of the battery pack case has a locking portion 5c and a protruding portion 5d.

The locking portions 5c have a substantially rectangular shape in FIG. 1, and are provided at both ends of the bottom of the battery pack case in the Y direction so as to project upward in the Z direction. Further, the end-side fixing portion 42a has a recess having a shape corresponding to the tip of the locking portion 5c on one side in the Y direction and on the lower side in the Z direction, and the recess is fitted into the tip of the locking portion 5c. With this configuration, the end-side fixing portion 42a is stably fixed to the bottom of the battery pack case in a state where the end-side fixing portion 42a receives an upper reaction force from the locking portion 5c. The height of the locking portion 5c in the Z direction is higher than the height of the recess in the Z direction. As a result, a gap 75 in the Z direction is provided between the end-side fixing portion 42a and the bottom surface of the battery pack case while the end-side fixing portion 42a is stably fixed to the bottom of the battery pack case.

On the other hand, the protruding portion 5d has a substantially rectangular shape in FIG. 1, and protrudes upward in the Z direction from a portion other than the end portion in the Y direction of the bottom of the battery pack case. The inner fixing portion 42b has a recess having a shape corresponding to the tip end portion of the protruding portion 5d on the lower side in the Z direction, and the recess extends in the Z direction. The inner fixing portion 42b is fixed to the bottom of the battery pack case by fixing the tip of the protruding portion 5d to the recess by press fitting or the like. The length of the recess of the inner fixing portion 42b in the Z direction is shorter than the height of the protruding portion 5d in the Z direction. As a result, with the inner fixing portion 42b fixed to the bottom of the battery pack case, a gap 75 in the Z direction is provided between the inner fixing portion 42b and the bottom of the battery pack case.

The spring passage holes 31 are provided on both sides of the pressing portion support portion 41 in the Y direction, and the spring fixing portions 42 face the pressing portion support portion 41 in the Y direction via the spring passage holes 31. The upper surface (upper surface in the Z direction) of the pressing portion support portion 41 extends substantially parallel to the bottom surface of the battery pack case. It is preferable that the length of the upper surface of the pressing portion support portion 41 in the Y direction is the same as or shorter than the length of the pressing portion 3a of the leaf spring 3 in the Y direction, and slightly shorter than the length of the pressing portion 3a in the Y direction.

The pressing portion 3a of the leaf spring 3 is placed on the upper surface of the pressing portion supporting portion 41, and is composed of a first diagonally lower extending portion 3b, an obliquely upper extending portion 3c, and a second diagonally lower extending portion 3d. The portion passes through the spring passage hole 31. A heat insulating sheet 55 having a substantially U-shaped cross section having an opening on one side in the Y direction is arranged and fixed in the gap 75 in the Z direction. The leaf spring 3 is attached to the bottom of the battery pack case by fitting and fixing the flat plate-shaped attachment portion 3e into the heat insulating sheet 55 through the opening. According to the present embodiment, the end portion of the leaf spring 3 is fitted into the heat insulating sheet 55, and the heat insulating sheet 55 accommodating the end portion of the spring member 3 comes into contact with the bottom surface of the battery pack case. Therefore, since the heat from the bottom surface of the battery pack case is transferred to the leaf spring 3 via the heat insulating sheet 55, it is possible to greatly suppress the heat transfer from the bottom surface of the battery pack case to the leaf spring 3, and the heat is transferred from the bottom surface of the battery pack case to the water jacket. It is possible to greatly suppress the transmission to 25.

As shown in FIG. 1, the water jacket 25 has an upper surface and a back surface substantially parallel to the bottom surface of the battery pack case. The upper surface of the water jacket 25 abuts on the back surface of the battery stack 1, and the back surface of the water jacket 25 faces the pressing portion 3a of the leaf spring 3 in the Z direction. An insulating heat insulating sheet 8 having an insulating property and a heat insulating property is arranged between the back surface of the water jacket 25 and the upper surface of the pressing portion 3a of the leaf spring 3. Since the heat insulating and heat insulating sheet 8 is arranged between the water jacket 25 and the pressing portion 3a of the leaf spring 3, the battery cell 10 and the leaf spring 3 can be insulated from each other, and electrical stability can be ensured. .. Further, by arranging the insulating heat insulating sheet 8, it is possible to substantially prevent the heat transferred from the battery pack case 5 to the leaf spring 3 from being transferred to the water jacket 25. Therefore, it is possible to substantially prevent the cooling performance of the water jacket 25 from being lowered by the heat from the leaf spring 3.

The pressing member 6 has a lean hose 61, an end side resin holder 62, and an inner resin holder 63. The end-side resin holder 62 is arranged in the gap in the Y direction between the battery stack 1 at the end in the Y direction and the side wall portion located at the end in the Y direction in the battery pack case 5. The end-side resin holder 62 extends in the Z direction from the upper side in the Z direction of the battery stack 1 to the lower side in the Z direction of the battery stack 1 along the Y-direction side surface of the battery stack 1. The end-side resin holder 62 has a flat plate-shaped pressed portion 62a and a locking portion 62b. The pressed portion 62a is provided at the upper end portion of the end side resin holder 62 in the Z direction, and the upper surface of the pressed portion 62a extends substantially parallel to the bottom surface of the battery pack case 5. As will be described in detail later, the pressed portion 62a is pressed downward in the Z direction by the lean hose 61.

The locking portion 62b is provided below the pressed portion 62a in the Z direction. The locking portion 62b projects in the Y direction from the plate-shaped main body portion 62c of the end-side resin holder 62 toward the battery stack 1. The lower surface of the locking portion 62b extends substantially parallel to the bottom surface of the battery pack case 5. The end-side resin holder 62 has an X-direction length substantially equal to the X-direction length of the battery stack 1 and extends in the X-direction along the side surface of the battery stack 1, and the locking portion 62b is also on the end side. It extends in the same length X direction as the resin holder 62. When viewed from the Z direction, the lower surface of the locking portion 62b on the distal end side overlaps the upper surface of each battery cell 10 included in the battery stack 1.

On the other hand, the inner resin holder 63 is arranged between the Y directions of the two battery stacks 1 adjacent to each other in the Y direction. The inner resin holder 63 extends in the Z direction from the upper side in the Z direction of the battery stack 1 to the lower side in the Z direction of the battery stack 1 along the side surface in the Y direction of the battery stack 1. Further, the inner resin holder 63 has a flat plate-shaped pressed portion 63a, a first locking portion 63b, and a second locking portion 63c. The pressed portion 63a is provided at the upper end portion of the inner resin holder 63 in the Z direction, and the upper surface of the pressed portion 63a extends substantially parallel to the bottom surface of the battery pack case 5. As will be described in detail later, the pressed portion 63a is also pressed downward in the Z direction by the lean hose 61 in the same manner as the pressed portion 62a.

The first and second locking portions 63b and 63c are provided below the pressed portion 63a in the Z direction. The first locking portion 63b projects from the plate-shaped main body portion 63d of the inner resin holder 63 to one side in the Y direction, and the second locking portion 63c protrudes from the main body portion 63d to the other side in the Y direction. The lower surfaces of the first and second locking portions 63b and 63c extend substantially parallel to the bottom surface of the battery pack case 5. The inner resin holder 63 has a length in the X direction substantially equal to the length in the X direction of the battery stack 1 and extends in the X direction along the side surface of the battery stack 1, and the first and second locking portions 63b. , 63c also extend in the same length X direction as the inner resin holder 63. When viewed from the Z direction, the lower surface on the tip end side of the first locking portion 63b overlaps the upper surface of each battery cell 10 included in the battery stack 1 on one side in the Y direction of the inner resin holder 63, and is second locked. The lower surface on the tip end side of the portion 63c overlaps the upper surface of each battery cell 10 included in the battery stack 1 on the other side in the Y direction of the inner resin holder 63.

As shown in FIG. 2, the battery pack case 5 opens on the upper side in the Z direction. As shown in FIGS. 1 and 2, the lean hose 61 crosses the upper part of the battery stack 1 near the center in the X direction from one side in the Y direction to the other side in the Y direction of the battery pack case 5 in the Y direction. As shown in FIG. 1, one end of the lean hose 61 in the Y direction is attached to the upper portion 5a of the one end of the battery pack case 5 in the Y direction by a fastening member 40 composed of bolts or the like, and the lean hose 61 in the Y direction and the like. The end portion is also attached to the upper portion 5b (see FIG. 2) of the other end portion of the battery pack case 5 in the Y direction by the fastening member 40.

The lean hose 61 has an end-side flat plate portion 61a that overlaps the pressed portion 62a of the end-side resin holder 62 when viewed from the Z direction, and also has a pressed portion 63a of the inner resin holder 63 when viewed from the Z direction. It has an overlapping inner flat plate portion 61b. When the lean hose 61 is fastened to the upper part of the battery pack case, the end side flat plate portion 61a presses the pressed portion 62a of the end side resin holder 62 downward in the Z direction, and the inner flat plate portion 61b covers the inner resin holder 63. The pressing portion 63a is pressed downward in the Z direction. As a result, the end-side resin holder 62 is applied with a downward force, and the locking portion 62b of the end-side resin holder 62 presses the upper surface of each battery cell 10 included in the battery stack 1 located at the end in the Y direction. Press down. Similarly, the inner resin holder 63 is subjected to a downward force, and the first locking portion 63b of the inner resin holder 63 is included in the battery stack 1 on one side of the inner resin holder 63 in the Y direction. The upper surface of each battery cell 10 is pressed downward, and the second locking portion 63c of the inner resin holder 63 is the upper surface of each battery cell 10 included in the battery stack 1 on the other side of the inner resin holder 63 in the Y direction. Press down.

As a result, each battery cell 10 presses the leaf spring 3 downward in the Z direction indicated by the arrow A in FIG. 3 via the water jacket 25 and the insulating heat insulating sheet 8. Then, the first diagonally lower extending portion 3b, the diagonally upper extending portion 3c, and the second diagonally lower extending portion 3d are distorted downward, and the leaf spring 3 is lowered from the position indicated by the solid line to the position indicated by the dotted line. Transforms to the side. As a result, the first diagonally lower extending portion 3b, the diagonally upper extending portion 3c, and the second diagonally lower extending portion 3d try to move upward to the solid line position in order to eliminate their distortions, and are indicated by arrows B. A restoring force in the upward direction is generated, and the water jacket 25 that receives this restoring force via the insulating heat insulating sheet 8 is pressed against the battery stack 1.

According to the above embodiment, the end side and the inner resin holders 62, 63 pressed downward by the attachment of the lean hose 61 always press the battery cell 10 downward, so that the battery cell 10 is pressed downward. Force can be generated at all times. Further, since the lean hose 61 is in contact with the end side and the inner resin holders 62,63, and the locking portions 62b, 63b, 63c of the end side and the inner resin holders 62,63 are in contact with the upper surface of the battery cell 10. The upward displacement of the battery cell 10 is substantially prevented, and the force of the end side and the inner resin holders 62 and 63 pressing the battery cell 10 downward is not eliminated. Therefore, the leaf spring 3 can be constantly deformed downward by the lower force from the battery cell 10, and the water jacket 25 can be constantly pressed against the lower surface of the battery cell 10 by the restoring force on the upper side of the leaf spring 3. As a result, the state in which the battery cell 10 is in close contact with the water jacket 25 can be stably maintained, the heat conduction between the water jacket 25 and the battery cell 10 becomes good, and the battery cell 10 is attached to the water jacket 25. Can be cooled efficiently.

Further, since the leaf spring 3 has a structure capable of absorbing the vertical displacement, it can follow the height deviation of the plurality of battery cells 10 in the stacking direction of the battery cells 10, and the leaf spring 3 can absorb the height deviation. Further, the leaf spring 3 can follow the displacement of the battery cell 10 in the Z direction due to vibration or the like, and the leaf spring 3 can absorb the vibration. Furthermore, since the leaf spring 3 is made of metal, a stable reaction force (restoring force) can be obtained for a long period of time, and the impact that the battery cell 10 receives from below due to road surface interference is also received by the leaf spring 3 for a long period of time. It can be absorbed stably and the impact can be mitigated. Therefore, damage to the battery unit 50 can be suppressed.

Further, the end side and the inner resin holders 62, 63 have flat plate-shaped pressed portions 62a, 63a at the upper end portion, and the lean hose 61 comes into contact with the pressed portions 62a, 63a to contact the pressed portions 62a. Since the flat plate portions 61a and 61b for pressing the 63a downward are provided, the pressing load from above can be efficiently transmitted from the lean hose 61 to the inner resin holders 62 and 63.

Further, since the lean hose 61 crosses the upper part of the battery pack case from one side in the Y direction to the other side in the Y direction, the battery unit 50 can be reinforced by the lean hose 61, and a vehicle loaded with the battery unit 50 collides. Sometimes the lean hose 61 can protect the battery stack 1. Further, since the inner resin holder 63 made of an insulating resin is arranged between the battery stacks 1 adjacent to each other in the Y direction, a short circuit due to contact between the battery cells 10 adjacent to each other in the Y direction can be reliably prevented.

The present invention is not limited to the above-described embodiment and its modifications, and various improvements and modifications can be made within the scope of the claims of the present application and the equivalent scope thereof.

For example, in the above embodiment, one leaf spring 3 is provided for each battery cell 10, but two or more leaf springs may be provided below at least one battery cell 10. Alternatively, one leaf spring may be provided for each battery stack, or may have a length in the X direction substantially equal to the length in the X direction of the battery stack. Further, a plate-like pressed portion 62a, 63 a provided on the upper end portion of the resin holder 62 and 63, a flat plate portion 61a for pressing the pressed portion 62a, 63 a on the lower side to the lean hose 61, and 61b provided However, the flat plate-shaped pressed portion may not be provided on the upper end of the resin holder, and the lean hose may not be provided with the flat plate portion. Further, although the insulating heat insulating sheet 8 is arranged between the battery cell 10 and the water jacket 25, the battery cell is brought into direct contact with the water jacket without inserting the insulating heat insulating sheet between the battery cell and the water jacket. May be good. Further, although both ends of the leaf spring 3 are arranged in the heat insulating sheet 55 having a substantially U-shaped cross section, both ends of the leaf spring may not be arranged in the heat insulating sheet having a substantially U-shaped cross section. Further, the pressing member 6 included the lean hose 61, the end side resin holder 62, and the inner resin holder 63, which are separate from each other, but the pressing member includes the lean hose and the end side resin holder integrally configured (molded). , And an inner resin holder. Further, although a metal leaf spring 3 is adopted as the urging member, the urging member may be a leaf spring made of a material (for example, rubber) having a restoring force other than metal. Alternatively, the urging member may be composed of a spring other than a leaf spring, for example, a coil spring or the like. Alternatively, the urging member may be composed of an elastic member (for example, a rubber member) that generates a restoring force when compressed.

1 Battery stack, 2 Cooler, 3 Leaf spring, 5 Battery pack case, 6 Press member, 10 Battery cell, 25 Water jacket, 50 Battery unit, 61 Lean hose, 62 End side resin holder, 63 Inner resin boulder.

Claims (1)

Battery cell and
A cooler provided under the battery cell and
An urging member that presses the cooler against the battery cell,
A battery pack case in which the battery cell, the cooler, and the urging member are stored, and
A holding member that is attached to the battery pack case and presses the battery cell from above so that the battery cell does not move upward is provided .
The battery pack case has an opening on the upper side in the height direction.
The holding member is fixed to the upper part of the battery pack case and extends from the lower side of the lean hose in the height direction to the lower side in the height direction of the lean hose that crosses the opening of the battery pack case. Has a resin holder and
The resin holder, engages the upper surface of the battery cell, the battery unit that have a locking portion that presses the upper surface of the battery cell on the lower side.

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