JP2007048637A - Battery pack and case for battery pack - Google Patents

Battery pack and case for battery pack Download PDF

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Publication number
JP2007048637A
JP2007048637A JP2005232609A JP2005232609A JP2007048637A JP 2007048637 A JP2007048637 A JP 2007048637A JP 2005232609 A JP2005232609 A JP 2005232609A JP 2005232609 A JP2005232609 A JP 2005232609A JP 2007048637 A JP2007048637 A JP 2007048637A
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Japan
Prior art keywords
battery
storage
storage container
cell unit
battery pack
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Pending
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JP2005232609A
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Japanese (ja)
Inventor
Teruo Segawa
輝夫 瀬川
Original Assignee
Nissan Motor Co Ltd
日産自動車株式会社
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Priority to JP2005232609A priority Critical patent/JP2007048637A/en
Publication of JP2007048637A publication Critical patent/JP2007048637A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/12Battery technologies with an indirect contribution to GHG emissions mitigation

Abstract

PROBLEM TO BE SOLVED: To provide a battery pack and a battery pack case capable of facilitating replacement of a cell unit and simplifying assembly.
SOLUTION: A battery pack 11 includes a cell unit 30 holding a battery, a storage container 40 provided with a storage chamber 41 for storing the cell unit, and a storage container provided on the outer surface of the storage container so that the storage containers can be inserted and removed freely. A connecting member 60 for connection and a pressing unit 50 that applies surface pressure in the battery thickness direction to the battery of the cell unit in the storage chamber by inserting and connecting the storage containers provided on the outer surface of the storage container. And having.
[Selection] Figure 4

Description

  The present invention relates to a battery pack and a battery pack case.

  A battery pack having a high output and a high capacity is obtained by electrically connecting a plurality of single cells in series and / or in parallel (see Patent Document 1). In general, a battery pack includes a battery module as a unit unit for assembly. This battery module is configured by storing a cell unit holding a single battery in a case and leading out positive and negative output terminals from the case. A battery pack is manufactured by electrically connecting a number of battery modules corresponding to the required output and capacity in series and / or in parallel. The battery modules are fastened to each other by inserting through bolts.

As the unit cell, a flat type battery in which a power generation element is sealed with an exterior material such as a laminate film is widely used. In a flat battery, positive and negative electrode terminals having a plate shape are led out from an exterior material. In order to maintain the battery performance of the unit cell, it is necessary to keep the distance between the electrode plates in the power generation element uniform. For this reason, the power generation element of a battery is pressed down using the case body which wraps a cell unit.
JP 2001-229896 A

  Since the battery modules are fastened to each other, for example, even if it is necessary to replace only some of the cell units, the cell units must be replaced unless all the battery modules are fastened. I can't.

  In addition, since the battery modules are fastened to each other to form the battery pack, there is a problem that the positioning of the battery modules is difficult and the assembly of the battery pack becomes complicated.

  An object of the present invention is to provide a battery pack and a battery pack case capable of facilitating cell unit replacement work and simplifying assembly.

The invention according to claim 1 for achieving the above object includes a cell unit holding a battery,
A storage container provided with a storage chamber for storing the cell unit;
A connecting member provided on an outer surface of the storage container, for connecting the storage containers so as to be freely inserted and removed; and
A battery provided on the outer surface of the storage container, and presses the storage containers to connect the batteries of the cell unit in the storage chamber by inserting and connecting the storage containers to each other. It is a pack.

The invention according to claim 9 for achieving the above object includes a storage container provided with a storage chamber for storing a cell unit holding a battery,
A connecting member provided on an outer surface of the storage container, for connecting the storage containers so as to be freely inserted and removed; and
A battery provided on the outer surface of the storage container, and presses the storage containers to connect the batteries of the cell unit in the storage chamber by inserting and connecting the storage containers to each other. It is a case for packs.

  In the battery pack according to the present invention and the battery pack using the battery pack case according to the present invention, the storage containers storing the cell units are detachably connected via a connecting member, and the cell units are directly connected to each other. Not signed. For this reason, one storage container can be easily extracted from a plurality of connected storage containers, the cell unit can be replaced by replacing the storage container, and the replacement operation of the cell unit is facilitated. Can do.

  A press portion provided on the outer surface of the storage container applies a surface pressure in the battery thickness direction to the batteries in the storage containers inserted and connected. For this reason, only by inserting the storage container, the distance between the electrode plates can be kept uniform, the battery performance can be maintained, and the assembly of the battery pack can be simplified.

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

  1 is a perspective view showing a battery pack 11 according to the embodiment, FIG. 2 is a front view showing a storage container 40 connected to the battery pack 11, FIG. 3 is a perspective view showing the storage container 40, and FIG. 4A is a diagram for explaining the press unit 50, FIG. 5 is a diagram for explaining the operation of the connecting member 60 and the press unit 50, and FIG. FIG. 7 is a perspective view illustrating an example of the battery 20, FIG. 8 is a diagram illustrating a state in which a connector 80 for voltage detection is attached, and FIG. 9 is a single storage container. It is a perspective view which shows the state which inserts and removes 40 with respect to the other storage container 40. FIG. The surface on the left front side shown in FIG. 1 is referred to as the front surface of each member such as the battery pack 11 and the storage container 40, and the surface on the right back side is referred to as the back surface.

  As shown in the drawing, the battery pack 11 can be summarized as a plurality of storage containers provided with a cell unit 30 holding a flat battery 20 (corresponding to a battery) and a storage chamber 41 for storing the cell unit 30. 40, provided on the outer surface of the storage container 40, and connected to the connecting member 60 for connecting the storage containers 40 so that the storage containers 40 can be freely inserted and removed, and provided on the outer surface of the storage container 40, and inserting and connecting the storage containers 40 to each other. Thus, the press unit 50 that applies a surface pressure in the battery thickness direction to the flat battery 20 of the cell unit 30 in the storage chamber 41 is provided. The storage container 40, the connecting member 60, and the press portion 50 constitute the battery pack case 12 according to the present invention. The battery pack 11 is further covered with an upper case 13 and a lower case 14, and is used by being mounted on a vehicle such as an automobile or a train. This will be described in detail below. The flat battery 20 is simply referred to as “battery 20”.

  Referring to FIG. 7, the battery 20 is, for example, a flat lithium ion secondary battery, and a laminated power generation element (not shown) in which a positive electrode plate, a negative electrode plate, and a separator are sequentially laminated is a laminate film or the like. It is sealed with an exterior material 20a. One end of the battery 20 is electrically connected to the power generation element, and a tab-like tab 20t is led out from the exterior member 20a. The tabs 20t extend on both sides of the battery 20 in the longitudinal direction. The tab 20t is a general term for the plus side tab 20p and the minus side tab 20m.

  Referring to FIGS. 3 and 4A, the cell unit 30 includes a holding plate 31 that holds the tab 20t. The cell unit 30 holds the battery 20 by fixing the holding plates 31 to each other. In the cell unit 30, a plurality of (for example, eight) batteries 20 are stacked in the battery thickness direction (vertical direction in FIG. 4). The plurality of stacked batteries 20 are connected in series, with the plus tab 20p of the upper battery 20 and the minus tab 20m of the lower battery 20 connected. Each holding plate 31 has a size that covers the tab 20t. The length of the holding plate 31 along the longitudinal direction is substantially equal to the length of the battery 20 in the short direction, that is, the width. The holding plate 31 is made of an electrically insulating material, for example, an electrically insulating resin material. Each of the tabs 20t is sandwiched by holding plates 31 from both sides along the battery 20 stacking direction.

  A connector 80 for detecting the voltage of each battery 20 is attached to the front and back of the cell unit 30. The connector 80 is fitted into the terminal portion 32 formed on the holding plate 31.

  The storage container 40 has a hollow, generally rectangular tube shape, and a storage chamber 41 that stores the cell unit 30 is formed therein. The storage container 40 is formed, for example, by extruding an aluminum extruded material. According to extrusion molding, the dimensional accuracy of the storage container 40 can be increased. The storage container 40 has an upper wall 42 shown on the upper side in the drawing, a lower wall 43 facing the upper wall 42, a right side wall 44 shown on the right side, and a left side wall 45 facing the right side wall 44. An insertion port 46 for inserting / removing the cell unit 30 into / from the storage chamber 41 is opened on the front surface and the back surface of the storage container 40. In the present embodiment, the cell unit 30 is stored in the storage chamber 41 such that the battery thickness direction is along the vertical direction of the storage container 40, and is connected to the battery 20 of the cell unit 30 by connecting the storage containers 40 in the vertical direction. On the other hand, a surface pressure in the battery thickness direction is applied. In order to apply a surface pressure to the battery 20, the upper wall 42 and the lower wall 43 have a necessary rigidity and a certain degree of flexibility. On the other hand, the right side wall 44 and the left side wall 45 do not need to have flexibility.

  The width dimension of the storage chamber 41, that is, the dimension between the inner surfaces of the left and right side walls 44 and 45 is formed larger than the width dimension of the cell unit 30. On the other hand, the height dimension of the storage chamber 41, that is, the dimension between the inner surfaces of the upper and lower walls 42 and 43 is formed slightly smaller than the dimension of the cell unit 30 in the battery thickness direction. When the cell unit 30 is stored in the storage chamber 41, first, the upper wall 42 and the lower wall 43 are pulled by a suction device or the like so as to be separated from each other, and the height dimension of the storage chamber 41 is expanded. With this state maintained, the cell unit 30 is inserted into the storage chamber 41 from the insertion port 46 on the front or back side of the storage container 40. When the pulled state of the upper wall 42 and the lower wall 43 is released after the cell unit 30 is stored, the cell unit 30 is pressed by the restoring force that the upper wall 42 and the lower wall 43 return to the original state. 41. The restoring force of the upper wall 42 and the lower wall 43 is insufficient to keep the distance between the electrode plates of the battery 20 uniform, but it prevents the cell unit 30 from falling out of the storage chamber 41 during handling. It is set to be strong enough. In order to regulate the position of the cell unit 30 in the left-right direction in the storage chamber 41, the inner surfaces of the upper and lower walls 42, 43 are finely fitted into grooves (not shown) formed in the uppermost and lowermost holding plates 31. A protrusion (not shown) is provided. By fitting the microprotrusions and the grooves, the position of the cell unit 30 in the left-right direction is restricted to a specific position in the storage chamber 41.

  Two connecting members 60 are provided on each of the upper wall 42 and the lower wall 43 in order to connect the storage containers 40 in the vertical direction. 4A shows an upper connection surface between the storage container 40 to which the line LU indicated by a two-dot chain line is connected upward, and a lower connection surface to the storage container 40 to which the line LD is connected downward. Is shown. In the illustrated example, two connecting members 60 are provided on each of the right side wall 44 and the left side wall 45 so that the storage containers 40 can be connected in the left-right direction. The connecting member 60 includes engaging convex portions 61 and 63 and engaging concave portions 62 and 64 that engage with the storage containers 40 while sliding.

  The connecting members 60 of the upper wall 42 are located at both left and right ends, and extend along the longitudinal direction of the storage container 40 (the direction from the front surface toward the back surface). The connecting member 60 of the upper wall 42 is configured by a rail-like engagement convex portion 61 having a T-shaped cross section. The engagement convex part 61 has a head part and a leg part for connecting the head part to a wall surface that is smaller than the cross-sectional dimension of the head part. The connecting members 60 of the lower wall 43 are located at both left and right ends and extend along the longitudinal direction of the storage container 40. The connecting member 60 of the lower wall 43 includes an engaging recess 62 having a T-section cross section that matches the cross-sectional shape of the engaging protrusion 61. The engagement recess 62 has a hollow portion into which the head portion of the engagement protrusion 61 is fitted, and a groove portion through which the leg portion of the engagement protrusion 61 is inserted. In order to connect the storage containers 40 to each other in the vertical direction, the engaging convex portion 61 of the upper wall 42 and the engaging concave portion 62 of the lower wall 43 are arranged on the same line. By fitting and sliding the engagement concave portion 62 of the upper storage container 40 and the engagement convex portion 61 of the lower storage container 40, the storage containers 40 are connected in the vertical direction. When the head portion of the engaging convex portion 61 and the hollow portion of the engaging concave portion 62 are fitted, the vertical connection of the storage container 40 is maintained.

  The connecting member 60 of the left side wall 45 is constituted by a rail-like engagement convex portion 63 that extends along the longitudinal direction of the storage container 40 and has a T-shaped cross section. This engagement convex part 63 also has a head part and a leg part. The connecting member 60 of the right side wall 44 includes an engaging recess 64 having a cross-sectional shape that extends along the longitudinal direction of the storage container 40 and matches the cross-sectional shape of the engaging convex portion 63. The engaging recess 64 also has a cavity and a groove. In order to connect the storage containers 40 to each other in the left-right direction, the engaging convex part 63 of the left side wall 45 and the engaging concave part 64 of the right side wall 44 are arranged on the same line. By fitting and sliding the engagement concave portion 64 of the left storage container 40 and the engagement convex portion 63 of the right storage container 40, the storage containers 40 are connected in the left-right direction. By fitting the head portion of the engaging convex portion 63 and the hollow portion of the engaging concave portion 64, the connection of the storage container 40 in the left-right direction is maintained.

  The plurality of storage containers 40 are connected in a shelf shape via a connecting member 60. As shown in FIG. 2, in this embodiment, a total of twelve storage containers 40 in three rows in the vertical direction and four rows in the horizontal direction are connected. A step may be provided in accordance with the space shape in which the storage container 40 is installed (for example, the left two rows are two steps, the right two rows are four steps).

  As described above, since the storage container 40 is extruded, the dimensional accuracy of the storage container 40 is high. For this reason, as shown in FIG. 5, the dimensional accuracy of the pitch p between the storage containers 40 connected in the vertical direction is high, and the dimensional accuracy is also high for the relative positions of the terminal portions 32.

  As shown also in FIG. 6, the container which electrically connects the cell units 30 inserted in each of the storage containers 40 by inserting and connecting the storage containers 40 to the outer surface of the storage container 40. A side terminal 70 (generic name for the positive container side terminal 71 and the negative container side terminal 72) is provided. The positive container side terminal 71 is disposed on the upper wall 42 and is electrically connected to a positive output terminal (not shown) of the cell unit 30. The negative container side terminal 72 is disposed on the lower wall 43 and is electrically connected to a negative output terminal (not shown) of the cell unit 30. The positive container side terminal 71 has a plate shape protruding upward from the upper wall 42, and the negative container side terminal 72 protrudes downward from the lower wall 43, and the positive container side terminal 71 extends from the left and right. It has a pair of leg shapes that can be sandwiched. Both the positive container side terminal 71 and the negative container side terminal 72 extend along the longitudinal direction of the storage container 40. The positive and negative container side terminals 71 and 72 are arranged on the same line. When the upper storage container 40 and the lower storage container 40 are slid and connected to each other, the negative container side terminal 72 in the upper storage container 40 and the positive container side terminal 71 in the lower storage container 40 are connected. And the cell units 30 in the vertical direction are electrically connected in series. When the cell units 30 in the row direction are electrically connected in series or in parallel, an appropriate connection member such as a bus bar (not shown) is used. By connecting a plurality of cell units 30 in series and parallel, the battery pack 11 corresponding to a desired current, voltage, and capacity can be formed.

  In order to maintain the battery performance by keeping the distance between the electrode plates uniform, the battery 20 needs to be pressed by applying pressure to the power generation element. Therefore, a press portion 50 that applies a surface pressure in the battery thickness direction to the battery 20 is provided on the outer surface of the storage container 40.

  The press part 50 has the conversion member 51 which converts the force at the time of inserting the storage containers 40 into the surface pressure in the battery thickness direction. The conversion member 51 is composed of a tapered surface.

  More specifically, referring to FIGS. 3 to 5, the press unit 50 includes an upper rib 52 provided on the upper wall 42 of the storage container 40 and a lower rib 53 provided on the lower wall 43. Yes. The upper rib 52 protrudes upward and extends along the longitudinal direction of the storage container 40. The lower rib 53 protrudes downward and extends along the longitudinal direction of the storage container 40. The upper rib 52 and the lower rib 53 are arranged on the same line. As shown in the enlarged view of FIG. 4A and FIG. 4B, the lower rib 53 protrudes below the lower connecting surface LD by the dimension d. This dimension d becomes a push allowance when the storage container 40 is connected in the vertical direction. The lower surface of the lower rib 53 is formed on a tapered surface 51 that forms a conversion member, and the projecting dimension from the lower connection surface LD increases from the front surface toward the back surface. For this reason, the lower storage container 40 can be inserted from the front side of the upper storage container 40. The upper rib 52 is formed flush with the upper connecting surface LU. As shown in FIG. 5, when the upper storage container 40 and the lower storage container 40 are slid and connected to each other, the lower surface of the lower rib 53 in the upper storage container 40 and the lower storage container 40 are connected. The upper surface of the upper rib 52 contacts. When the upper and lower ribs 52, 53 are pressed against each other by a pressing allowance (dimension d), a pressing force that narrows the height dimension of the storage chamber 41 is generated, and this pressing force is applied to the cell unit 30. The pushing allowance (dimension d) can be any dimension as long as it can generate a pressing force, but is about 0.5 mm, for example.

  The upper and lower storage containers 40 are connected via connecting members 60 located at both ends in the width direction of the storage container 40, and the upper and lower ribs 52 and 53 in the center region in the width direction are pressed against each other, so that the overall rigidity is increased. Is sufficiently secured. Since the plurality of storage containers 40 are rigidly coupled to increase the natural frequency, the battery pack 11 has a high fatigue strength due to resonance during vibration.

  Next, the operation will be described.

  When assembling the battery pack 11, first, the upper wall 42 and the lower wall 43 of the storage container 40 of the battery pack case 12 are pulled apart by a suction device or the like to increase the height of the storage chamber 41. . While maintaining this state, the cell unit 30 holding the battery 20 is inserted into the storage chamber 41 from the insertion port 46. After the cell unit 30 is stored, the pulled state of the upper wall 42 and the lower wall 43 is released. The cell unit 30 is pressed by the restoring force of the upper wall 42 and the lower wall 43 and is held in the storage chamber 41. The restoring force of the upper wall 42 and the lower wall 43 prevents the cell unit 30 from falling out of the storage chamber 41 during handling. In the present embodiment, twelve battery pack cases 12 containing the cell units 30 are prepared.

  The engaging concave portion 62 of the upper storage container 40 and the engaging convex portion 61 of the lower storage container 40 are fitted and slid to connect the storage containers 40 in the vertical direction. The head part of the engagement convex part 61 and the cavity part of the engagement recessed part 62 fit, and the vertical connection of the storage container 40 is maintained. By inserting the storage containers 40, the taper surface 51 on the lower surface of the lower rib 53 and the upper surface of the upper rib 52 come into contact with each other.

  When the upper storage container 40 and the lower storage container 40 are inserted to a predetermined position, the lower rib 53 and the upper rib 52 are pressed by a pressing allowance (dimension d). A pressing force that narrows the height of the storage chamber 41 is generated, and this pressing force is applied to the cell unit 30. The force at the time of inserting the storage containers 40 can be easily converted into the surface pressure in the battery thickness direction by the tapered surface forming the conversion member 51. Thus, the press part 50 gives the surface pressure of a battery thickness direction with respect to the battery 20 of the cell unit 30 in the storage chamber 41 (refer the white arrow of FIG. 5). As a result, in the battery 20, the distance between the electrode plates is kept uniform, and the battery performance is maintained.

  When the upper storage container 40 and the lower storage container 40 are inserted to a predetermined position, the negative container side terminal 72 and the positive container side terminal 71 are slid and fitted to each other, and the vertical direction The cell units 30 are electrically connected in series.

  Next, the engagement concave portion 64 of the left storage container 40 and the engagement convex portion 63 of the right storage container 40 are fitted and slid to connect the storage containers 40 in the left-right direction. The head part of the engaging convex part 63 and the cavity part of the engaging concave part 64 fit, and the connection of the storage container 40 in the left-right direction is maintained.

  When the cell units 30 in the row direction are electrically connected in series or in parallel, an appropriate connection member such as a bus bar (not shown) is used. A plurality of cell units 30 are connected in series and parallel via the positive and negative container side terminals 71 and 72 and the bus bar, and the battery pack 11 corresponding to the desired current, voltage and capacity is obtained.

  After the storage container 40 is connected, voltage detection connectors 80 are attached to the front and back surfaces of each cell unit 30. The dimensional accuracy of the pitch p between the storage containers 40 connected in the vertical direction is high, and the dimensional accuracy is also high for the relative positions of the terminal portions 32. For this reason, as shown in FIG. 8, three voltage detection connectors 80 can be integrally formed and can be fitted into the terminal portions 32 of the holding plate 31 at a time. Therefore, it is easy to automate the assembly work of the connector 80.

  The assembly of the battery pack 11 is completed as described above, and the battery pack 11 is covered with the upper case 13 and the lower case 14 and is used by being mounted on an automobile or the like.

  The battery pack 11 is air-cooled, and the space in the storage chamber 41 is used as a cooling air passage through which cooling air for cooling the cell unit 30 flows. A space is also formed between the outer surfaces of the connected storage containers 40, and this space is also used as a cooling air passage. By cooling the wall surface of the storage container 40, the heat radiation from the cell unit 30 can be promoted, and the cell unit 30 can be cooled. Moreover, since the upper rib 52 and the lower rib 53 function as a heat radiating fin, the heat dissipation performance of the storage container 40 is also high. By cooling each cell unit 30 by flowing cooling air, it is possible to reduce battery temperature and suppress deterioration of characteristics such as charging efficiency. A space is formed simply by inserting the cell unit 30 into the storage chamber 41, and a space is formed simply by connecting the storage containers 40 to each other. Therefore, there is no need to separately arrange a collar for forming a gap.

  In the battery pack 11 of the present embodiment, the storage containers 40 storing the cell units 30 are connected to each other via a connecting member 60 so as to be freely inserted and removed, and the cell units 30 are not directly fastened. For this reason, as shown in FIG. 9, the one storage container 40 can be easily extracted from among the plurality of connected storage containers 40. When the new storage container 40 is inserted into the original position, the pressing unit 50 applies a surface pressure in the battery thickness direction to the battery 20 of the new cell unit 30 stored in the storage container 40. The replacement operation of the cell unit 30 is completed. Thus, the cell unit 30 can be replaced by replacing the storage container 40, and the replacement operation of the cell unit 30 can be facilitated.

  Furthermore, the relative positioning of the cell units 30 can be performed simply by inserting the cell units 30 into the storage chamber 41 of the storage container 40 and connecting the storage containers 40 together. For this reason, compared with the form which mutually fastens the battery module which accommodated the cell unit 30 in the case, and comprises the battery pack 11, relative positioning of the cell units 30 is easy, and the assembly of the battery pack 11 is carried out. Can be simplified.

  A press portion 50 provided on the outer surface of the storage container 40 applies a surface pressure in the battery thickness direction to the battery 20 of the cell unit 30 in the storage chamber 41. For this reason, the distance between the electrode plates can be kept uniform, and the battery performance can be maintained.

  When assembling the battery pack 11, there is no need to insert a bolt through the storage container 40 or arrange a collar between the cell units 30, and the number of mounting steps and the number of parts can be reduced. From this point of view, the assembly of the battery pack 11 can be simplified.

  Since the surface pressure in the battery thickness direction is generated by the press unit 50, the surface pressure can be easily adjusted and managed as compared with the case where the power generation element of the battery 20 is pressed using a case body that wraps the cell unit 30. Can do. The operation of wrapping the cell unit 30 with the case body so as to obtain a predetermined surface pressure and the case body itself can be abolished. From this viewpoint, the assembly of the battery pack 11 can be simplified.

  The cell unit 30 is stored in the storage chamber 41 so as to be freely inserted and removed. When a certain cell unit 30 needs to be replaced, first, only the storage container 40 including the cell unit 30 is slid out. Since the pressurization by the press unit 50 is released, the existing cell unit 30 can be easily extracted from the extracted storage container 40, and a new cell unit 30 can be easily inserted into the storage chamber 41. When the storage container 40 is inserted into the original position, the pressing unit 50 applies a surface pressure in the battery thickness direction to the battery 20 of the new cell unit 30, and the replacement operation of the cell unit 30 is completed. . Since only the cell unit 30 can be replaced and the storage container 40 can be used repeatedly, it is excellent in economic efficiency.

  Since the cell unit 30 has a plurality of batteries 20 stacked in the battery thickness direction, the cell unit 30 corresponding to a desired current, voltage, and capacity can be manufactured.

  Since the plurality of storage containers 40 are connected in a shelf shape via the connecting member 60, the required number of storage containers 40 and thus the required number of cell units 30 can be easily stored.

  Since the connecting member 60 is composed of engaging convex portions 61 and 63 and engaging concave portions 62 and 64 that are engaged with each other while sliding the storage containers 40, the storage containers 40 can be easily connected to each other so as to be freely inserted and removed. Can do.

  On the outer surface of the storage container 40, a container-side terminal 70 is provided to electrically connect the cell units 30 inserted into the storage containers 40 by inserting and connecting the storage containers 40 to each other. Therefore, the electrical connection work between the cell units 30 in the storage container 40 can be performed simultaneously with the work of inserting the storage container 40 through the container-side terminal 70.

  Since the press part 50 has the conversion member 51 which converts the force at the time of inserting storage containers 40 into the surface pressure of a battery thickness direction, the operation | work which provides surface pressure to the battery 20 is inserted. Can be done at the same time.

  By configuring the conversion member 51 from a tapered surface, the force when inserting the storage container 40 can be easily converted into the surface pressure in the battery thickness direction.

  According to the battery pack case 12 having the storage container 40, the connecting member 60, and the press portion 50, as described above, the replacement operation of the cell unit 30 can be facilitated and the assembly can be simplified. it can.

(Other variations)
In the present invention, the number of cell units 30 stored in one storage chamber 41 is not limited. For example, a plurality of cell units 30 may be stored in one storage chamber 41.

  Although the cell unit 30 described above has a plurality of batteries 20 electrically connected thereto, the present invention is also applicable to a cell unit 30 including only one battery 20.

It is a perspective view which shows the battery pack which concerns on embodiment. It is a front view which shows the storage container connected in the battery pack. It is a perspective view which shows a storage container. FIG. 4A is a front view showing the storage container, and FIG. 4B is a diagram for explaining the press section. It is a figure where it uses for description of an effect | action of a connection member and a press part. It is a perspective view with which it uses for description of a container side terminal. It is a perspective view which shows an example of a battery. It is a figure which shows the state which attaches the connector for voltage detection. It is a perspective view which shows the state which inserts and removes one storage container with respect to another storage container.

Explanation of symbols

11 Battery pack,
12 Battery pack case,
20 batteries,
30 cell units,
31 holding plate,
32 terminal section,
40 storage container,
41 storage room,
42 Upper wall,
43 Lower wall,
44 right side wall,
45 Left side wall,
46 insertion slot,
50 Press department,
51 taper surface (conversion member),
52 Upper rib,
53 Lower rib,
60 connecting members,
61, 63 engaging convex part,
62, 64 engaging recess,
70 Container side terminal,
71 Positive container side terminal,
72 Negative container side terminal,
80 Connector for voltage detection.

Claims (9)

  1. A cell unit holding a battery;
    A storage container provided with a storage chamber for storing the cell unit;
    A connecting member provided on an outer surface of the storage container, for connecting the storage containers so as to be freely inserted and removed; and
    A battery provided on the outer surface of the storage container, and presses the storage containers to connect the batteries of the cell unit in the storage chamber by inserting and connecting the storage containers to each other. pack.
  2.   The battery pack according to claim 1, wherein the cell unit is housed in the housing chamber so as to be freely inserted and removed.
  3.   The battery pack according to claim 1, wherein the cell unit includes a plurality of the batteries stacked in the battery thickness direction.
  4.   The battery pack according to claim 1, wherein the plurality of storage containers are connected in a shelf shape via the connection member.
  5.   The battery pack according to claim 1, wherein the connecting member includes an engaging convex portion and an engaging concave portion that are engaged with each other while sliding the storage containers.
  6.   A container-side terminal that is provided on an outer surface of the storage container and electrically connects the cell units inserted into the storage containers by inserting and connecting the storage containers to each other; The battery pack according to claim 1, wherein:
  7.   The battery pack according to claim 1, wherein the press portion includes a conversion member that converts a force when the storage containers are inserted into a surface pressure in the battery thickness direction.
  8.   The battery pack according to claim 8, wherein the conversion member includes a tapered surface.
  9. A storage container provided with a storage chamber for storing a cell unit holding a battery;
    A connecting member provided on an outer surface of the storage container, for connecting the storage containers so as to be freely inserted and removed; and
    A battery provided on the outer surface of the storage container, and presses the storage containers to connect the batteries of the cell unit in the storage chamber by inserting and connecting the storage containers to each other. Pack case.
JP2005232609A 2005-08-10 2005-08-10 Battery pack and case for battery pack Pending JP2007048637A (en)

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JP2005232609A JP2007048637A (en) 2005-08-10 2005-08-10 Battery pack and case for battery pack

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Application Number Priority Date Filing Date Title
JP2005232609A JP2007048637A (en) 2005-08-10 2005-08-10 Battery pack and case for battery pack

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JP2010503973A (en) * 2006-09-18 2010-02-04 エルジー・ケム・リミテッド Battery module and medium or large battery pack including the same
WO2008035872A1 (en) 2006-09-18 2008-03-27 Lg Chem, Ltd. Battery module, and middle or large-sized battery pack containing the same
JP2008243412A (en) * 2007-03-26 2008-10-09 Nissan Motor Co Ltd Battery pack and connector module for battery pack
JP2009259752A (en) * 2008-03-25 2009-11-05 Baysun Co Ltd Holder for cells, hold assembly, and battery pack
JP2010225337A (en) * 2009-03-21 2010-10-07 Honda Motor Co Ltd Battery pack
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JP2012252898A (en) * 2011-06-03 2012-12-20 Furukawa Sky Kk Battery cell storage housing and manufacturing method thereof
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US9748538B2 (en) 2012-08-10 2017-08-29 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Motor vehicle battery
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