JP2013243061A - Battery module - Google Patents

Abstract

A battery module having excellent vibration resistance and impact resistance is provided.
A battery module includes a flat unit battery container having two main surfaces, a front surface and a back surface, and a unit battery having a pull-out tab drawn out from a laminate film packaging material that houses an electrode laminate. 100, cover bodies 910 and 920 that sandwich the unit battery 100 with the unit battery housing body 800, a movement regulating member 170 disposed in a space between the drawer tab and the laminate film exterior material, Have
[Selection] Figure 18

Description

  The present invention relates to a battery module configured using a secondary unit battery such as a lithium ion battery.

  In recent years, due to environmental problems, clean energy obtained from wind power generation, solar power generation, and the like that can be used for home use such as a detached house and industrial use such as transportation equipment and construction equipment has attracted attention. However, the clean energy has a problem that the output varies greatly depending on the situation. For example, energy from solar power generation can be obtained during the day when the sun is rising, but not at night after the sun has set.

  In order to stabilize the output of clean energy, a technique for temporarily storing clean energy in a battery is used. For example, solar energy stored in a battery can be used at night after the sun goes down. As a battery for storing such clean energy, a lead battery is generally used. However, a lead storage battery is generally large in size and has a drawback of low energy density.

  Therefore, in recent years, lithium ion secondary batteries that can operate at room temperature and have high energy density have attracted attention. In addition to the characteristic that the energy density is high, the lithium ion secondary battery also has a feature that it has excellent responsiveness because of its low impedance.

  As a lithium ion secondary battery, for example, a battery element (an electrode laminate in which a plurality of sheet-like positive electrodes and a plurality of sheet-like negative electrodes are laminated via a separator) is enclosed in a flexible film. There are laminated batteries. Laminated batteries are generally flat and positive and negative electrodes are drawn out of the flexible film.

  2. Description of the Related Art A technique is known that is suitable for increasing the capacity by connecting two or more of the above laminated batteries in series, housing them in a container body (casing), and modularizing them.

For example, in Patent Document 1 (Japanese Patent No. 3970684), an assembled battery configured by connecting four sheet-shaped secondary battery cells formed in a sheet shape in series with each other and the assembled battery are accommodated. A battery module including a thin rectangular parallelepiped casing is disclosed.
Japanese Patent No. 3970684

  In the case of a battery module in which a laminated battery is incorporated in a casing as described in Patent Document 1, the periphery of the laminated battery is fixed to the casing by adhesion or the like, or the battery pull-out tab is screwed. As a result, even if the unit battery is fixed in the casing, the electrode stack provided in the laminate film is slightly displaced. The electrode laminate acts like a pendulum, eventually the laminate film breaks and the electrolyte leaks, or the current collector that conductively connects the electrode laminate and the drawer tab breaks. Alternatively, there is a problem that the drawer tab is broken.

The present invention solves the above problems, and a battery module according to the present invention is a laminate film containing a flat substrate having two main surfaces, a front surface and a back surface, and an electrode laminate. A unit battery having a drawer tab drawn out from an exterior material, a cover body for sandwiching the unit battery with the base, and a movement regulating member disposed in a space between the drawer tab and the laminate film exterior material And having.

  In the battery module according to the present invention, a plurality of the movement restricting members are arranged so as to sandwich the drawer tab.

  In the battery module according to the present invention, the movement restricting member is made of an elastic material.

  In the battery module according to the present invention, the elastic material is a sponge.

  In the battery module according to the present invention, the elastic material is rubber.

  In the battery module according to the present invention, a cross section obtained by cutting the movement restricting member is rectangular on a surface including both the stacking direction of the electrode laminate and the pulling direction of the pulling tab.

  The battery module according to the present invention has a trapezoidal cross section obtained by cutting the movement restricting member on a surface including both the stacking direction of the electrode laminate and the pulling direction of the pulling tab.

  The battery module according to the present invention is a plane including both the stacking direction of the electrode laminate and the pulling-out direction of the pull-out tab, and a cross section obtained by cutting the movement restricting member has a long hole shape. The battery module according to claim 5.

  In addition, the battery module according to the present invention includes a length d1 of the electrode stack and a length of the movement restricting member in a direction perpendicular to both the stacking direction of the electrode stack and the pulling-out direction of the extraction tab. There is a relationship of d2> d1 with d2.

  In the battery module according to the present invention, there is a relationship of h2> h1 between the height h1 of the electrode stack and the height h2 of the movement restricting member in the stacking direction of the electrode stack.

  In the battery module according to the present invention, the movement restricting member is fixed to the unit battery.

  In the battery module according to the present invention, the movement restricting member is fixed to the base.

  In the battery module according to the present invention, the movement restricting member is fixed to the cover body.

  In the battery module according to the present invention, the drawer tab of the unit battery is provided with a plurality of through holes.

  In the battery module according to the present invention, the base is provided with a plurality of protrusions corresponding to the plurality of through holes.

  In the battery module according to the present invention, a cross-shaped reinforcing rib is provided around the plurality of protrusions.

According to the battery module of the present invention, since the movement restricting member acts to limit the movement of the electrode laminate housed in the laminate film exterior material, a long-time vibration or impact is applied to the battery module. However, the probability that the laminate film exterior material will break and the electrolyte leaks, the current collector that electrically connects the electrode stack and the drawer tab, or the drawer tab breaks is reduced. In addition, a battery module having excellent vibration resistance and impact resistance can be provided.

It is a figure which shows the unit battery 100 which comprises the battery module which concerns on embodiment of this invention, and its preliminary processing process. It is the perspective view of the unit battery 100 which the preliminary processing process was completed. It is a figure explaining the battery container 800 used when comprising the battery module which concerns on embodiment of this invention. It is a figure explaining the battery container 800 used when comprising the battery module which concerns on embodiment of this invention. It is a figure explaining attachment to the battery container 800 of the 1st connector 828. It is a figure explaining the attachment to the connector attachment panel 847 of the 2nd connector 840. FIG. It is a figure explaining the attachment to the battery accommodating body 800 of the connector attachment panel 847. FIG. FIG. 10 is a front view of a second connector 840 attached to a battery housing body 800. It is a figure explaining the manufacturing process of the battery module which concerns on embodiment of this invention. It is a figure explaining the manufacturing process of the battery module which concerns on embodiment of this invention. It is a figure explaining the manufacturing process of the battery module which concerns on embodiment of this invention. It is a figure explaining the manufacturing process of the battery module which concerns on embodiment of this invention. It is a figure explaining the manufacturing process of the battery module which concerns on embodiment of this invention. It is a figure explaining the manufacturing process of the battery module which concerns on embodiment of this invention. It is a figure explaining the manufacturing process of the battery module which concerns on embodiment of this invention. It is a figure explaining the manufacturing process of the battery module which concerns on embodiment of this invention. It is a figure explaining the manufacturing process of the battery module which concerns on embodiment of this invention. 1 is an exploded perspective view showing a battery module according to an embodiment of the present invention. It is a perspective view which shows the battery module 1000 which concerns on embodiment of this invention. It is a figure explaining the arrangement | positioning condition of the movement control member 170 in the battery module 1000 which concerns on embodiment of this invention. It is a schematic cross section explaining the effect of the movement restricting member 170 in the battery module 1000 according to the embodiment of the present invention. It is a figure which shows the test result of the battery module which concerns on embodiment of this invention, and the battery module which concerns on a comparative example. It is a schematic cross section explaining the effect of the movement restricting member 170 in the battery module 1000 according to another embodiment of the present invention. It is a schematic cross section explaining the effect of the movement restricting member 170 in the battery module 1000 according to another embodiment of the present invention. 5 is a diagram illustrating a manufacturing process of the battery management circuit unit 1100. FIG. 5 is a diagram illustrating a manufacturing process of the battery management circuit unit 1100. FIG. 5 is a diagram illustrating a manufacturing process of the battery management circuit unit 1100. FIG. FIG. 6 is a diagram showing a battery management circuit unit 1100. It is a figure which shows the outline | summary of the electrical storage apparatus 1200 in which the battery module 1000 which concerns on embodiment of this invention was used. FIG. 11 illustrates a relay board 1150 of a power storage device 1200. It is a figure which shows the outline | summary of the electrical storage apparatus 1200 in which the battery module 1000 which concerns on embodiment of this invention was used. It is a figure explaining the structure of the 2nd connector 840 periphery of the battery module 1000 which concerns on embodiment of this invention. It is a figure which shows the outline | summary of the electrical storage apparatus 1200 in which the battery module 1000 which concerns on embodiment of this invention was used. It is a figure which shows the outline | summary of the electrical storage apparatus 1200 in which the battery module 1000 which concerns on embodiment of this invention was used.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a unit battery 100 constituting a battery module according to an embodiment of the present invention and a preliminary processing step thereof. As the unit battery 100, a lithium ion secondary unit battery, which is a kind of electrochemical device, is charged and discharged by moving lithium ions between a negative electrode and a positive electrode.

  FIG. 1A shows a unit battery 100 that has not been subjected to preliminary processing. The battery body 110 of the unit battery 100 includes an electrode laminate 60 in which a plurality of sheet-like positive electrodes and a plurality of sheet-like negative electrodes are laminated via separators (not shown), and an electrolyte solution (none of which is shown). It has a structure accommodated in a rectangular laminate film exterior material 90 in plan view. A positive electrode pull-out tab 120 is drawn from one end (side) of the battery main body 110, and a negative electrode pull-out tab 130 is drawn from the other end (side) opposite to the one end. . A stacking direction in which a plurality of sheet-like positive electrodes and a plurality of sheet-like negative electrodes as described above are stacked via a separator is defined as a sheet thickness direction.

  The positive electrode pull-out tab 120 and the negative electrode pull-out tab 130 are both flat, and in the laminate film exterior material 90, respectively, are passed through a sheet-like positive electrode, a sheet-like negative electrode, and a current collector 70 (not shown in FIG. 1). It is connected. More specifically, in the laminate film exterior material 90, the sheet-like positive electrode and the positive electrode lead-out tab 120 are constituted by a positive electrode current collector 70 (not shown in FIG. 1), and the sheet-like negative electrode and the negative electrode lead-out tab. 130 is conductively connected by a negative electrode current collector 70 (not shown in FIG. 1).

  The laminate film exterior material 90 is made of a metal laminate film having a heat-sealing resin layer. More specifically, for example, two metal laminate films are laminated with the heat sealing resin layers facing each other to form a laminate film exterior material 90, and an electrode laminate having a sheet-like positive electrode, a sheet-like negative electrode, and a separator. The outer periphery of the laminate film exterior material 90 is heat-sealed in a state where the body 60 and the electrolytic solution are accommodated therein, so that the inside is sealed.

  Here, metal pieces such as the positive electrode pull-out tab 120 and the negative electrode pull-out tab 130 drawn from the battery main body 110 made of the laminate film exterior material 90 are referred to as “drawer tabs”. A sheet-like positive electrode or a sheet-like negative electrode laminated via a liquid electrolyte or an electrolytic solution is referred to as an “electrode”.

  In addition to the laminate of the plurality of sheet-like positive electrodes and the plurality of sheet-like negative electrodes via the separator as described above, the sheet laminate positive electrode and the sheet-like negative electrode are laminated via the separator. The thing which makes a laminated body by winding a thing and compressing this is also contained.

In the unit battery 100 as described above, the material of the positive electrode pull-out tab 120 is aluminum or an aluminum alloy, the material of the negative electrode pull-out tab 130 is nickel, and a material obtained by nickel plating other metals (nickel plating). Materials, such as nickel-plated copper, etc., and nickel and other metal clads (nickel clad materials, for example,
Nickel-copper clad) is generally used. In the present embodiment, a positive electrode extraction tab 120 made of aluminum and a negative electrode extraction tab 130 made of nickel-plated copper are used.

  The unit battery 100 configured as described above is subjected to preliminary processing as a pre-assembly stage in the battery module. First, as shown in FIG. 1B, the copper extension tab member 140 is ultrasonically welded by the welding portion 143 to be connected to the positive electrode pull-out tab 120. The reason for using such an additional tab member 140 will be described.

  In configuring the battery module according to the present invention, the positive electrode pull-out tab 120 of the unit battery 100 and the negative electrode pull-out tab 130 of the unit battery 100 adjacent to the unit battery 100 are mechanically fixed to the copper bus bar with screws. By doing so, electrical connection is made.

  Here, in the configuration in which the positive electrode pull-out tab 120 containing aluminum of the unit battery 100 and the copper bus bar are mechanically fixed, there is a possibility that the conductivity after a predetermined period of time has deteriorated due to a potential difference problem. is there.

  Therefore, in the battery module according to the present invention, as described above, the copper extension tab member 140 is joined to the positive electrode lead tab 120 of the unit battery 100 by welding. Then, the problem of conductivity deterioration due to the potential difference is solved by mechanically fixing the copper extension tab member 140 and the bus bar. According to such a configuration, the mechanical electrical connection portion is electrically connected by the same kind of metal material, there is no problem of a potential difference, and there is almost no deterioration in conductivity due to the passage of time.

  1C, three alignment through holes 124 are provided in the positive electrode pull-out tab 120, and through holes 145 are provided in the add-on tab member 140 added to the positive electrode pull-out tab 120. Two alignment through holes 134 and 135 are provided in 130. Among these through-holes, the alignment through-hole 124 of the positive electrode pull-out tab 120 and the alignment through-hole 134 of the negative electrode pull-out tab 130 are used when the unit battery 100 is set in the unit battery housing 800 described in detail later. To do.

  The unit battery housing 800 is provided with a unit battery alignment protrusion 860. When the unit battery 100 is placed on the unit battery housing 800, the unit battery alignment protrusion 860 is aligned with the alignment through hole. 124, by passing through the alignment through hole 134, the unit battery 100 can be easily set in the unit battery housing 800, and the manufacturing efficiency is good.

  In addition, about the alignment through-hole, it is preferable to provide two or more with respect to one drawer tab. By configuring the battery module so that the alignment protrusions are inserted through these alignment through holes, the inventors have ensured durability when a long-time vibration or impact is applied to the battery module. It is found by the test by.

  In addition, the through hole 145 of the extension tab member 140 and the through hole 135 of the negative electrode pull-out tab 130 are (1) mechanically fixed to the unit battery housing body 800 as described later (2 This is used to electrically connect the tab to the bus bar of the unit battery housing 200, and (3) to electrically connect the tab, the sense line, and the power line.

In the subsequent step of FIG. 1D, the movement regulating member 170 made of an elastic material having elasticity and having a rectangular parallelepiped shape is arranged between the positive electrode extraction tab 120, the negative electrode extraction tab 130, and the laminate film exterior material 90. Attach it to the space to be used. In this step, the electrode stacking area 10
A double-sided tape (not shown) is affixed to the laminate film exterior material 90 between 5 and the drawer tab, and the movement regulating member 170 is affixed to the double-sided tape.

  The movement restricting member 170 suppresses the displacement of the electrode laminate 60 accommodated in the laminate film exterior material 90 of the unit battery 100, and is moved from both sides of the positive electrode extraction tab 120 (or the negative electrode extraction tab 130). It is arranged so as to sandwich. Accordingly, two movement restricting members 170 are used corresponding to one drawer tab, and a total of four movement restricting members 170 are used in the unit battery 100 shown in FIG.

  As a material of the elastic material used for the movement restricting member 170, for example, synthetic rubber such as chloroprene rubber or neoprene rubber (registered trademark of DuPont) can be used. Further, as the elastic material of the movement restricting member 170, a sponge-like material obtained by foaming the above material can be used. In addition, as the elastic material of the movement restricting member 170, a material such as the one described above that is made into a dense rubber can be used. In this embodiment, a sponge of neoprene rubber (registered trademark of DuPont) having a Young's modulus of 60.28 kN / m and a hardness of C hardness of 50 ± 5 is used as the movement restricting member 170.

  FIG. 2 is a perspective view of the unit battery 100 after the preliminary processing step is completed. Here, a preferable form as a dimension and shape of the movement restricting member 170 will be described.

  Regarding the shape of the movement restricting member 170, the movement restricting member 170 is cut on a plane including both the stacking direction of the electrode laminate 60 and the pulling direction of the positive electrode pulling tab 120 (or the negative electrode pulling tab 130). It is preferable to use one having a rectangular cross section. This is because the movement regulating member 170 having such a shape can be easily molded, and the manufacturability of the battery module is improved.

  Further, regarding the dimensions of the movement restricting member 170, the electrode stack 60 in a direction perpendicular to both the stacking direction of the electrode stack 60 and the pulling direction of the positive electrode pulling tab 120 (or the negative electrode pulling tab 130). It is preferable that there is a relationship of d2> d1 between the length d1 and the length d2 of the movement restricting member 170. In such a dimensional relationship, when the battery module receives vibration, the movement restricting member 170 can efficiently suppress the displacement of the electrode stack 60.

  Regarding the dimensions of the movement restricting member 170, the height h1 of the electrode laminate 60 in the laminating direction of the electrode laminate 60 and the movement restricting member in view of the reference where the position of the laminate film exterior member 90 is 0. It is preferable that there is a relationship of h2> h1 with the height h2 of 170. In this dimensional relationship, the movement regulating member 170, which is an elastic member, is sandwiched between the unit battery housing body 800 and the first surface cover body 910 (or the second surface cover body 920) and compressed. The displacement of the electrode stack 60 can be reliably suppressed.

  Next, a detailed configuration of the unit battery housing body 800 for housing the unit battery 100 prepared and processed as described above will be described. FIG. 3 is a diagram for explaining a battery housing body 800 used in configuring the battery module according to the embodiment of the present invention. FIG. 4 is an enlarged view of the encircled portion A in FIG.

  The battery housing body 800 is a member made of synthetic resin such as ABS. In the battery housing body 800, the unit batteries 100 and the like are assembled, and wiring between the unit batteries 100 is performed.

The battery housing body 800 includes a flat substrate, and a peripheral partition wall formed on the peripheral surfaces of the front surface and the back surface, which are the two main surfaces of the substrate. The peripheral partition wall portion is composed of a first surface peripheral partition wall portion provided on the substrate surface side and a second surface peripheral partition wall portion provided on the substrate back surface side. Here, FIG. 3 is a perspective view of the base surface side of the battery housing body 800. The main surface of the battery housing body on the substrate surface side shown in FIG. 3 is the first surface 801, and the main surface of the battery housing body not shown in FIG. explain. The second surface 812 on the back surface side of the base body has substantially the same configuration as that of the first surface 801 except that it is a mirror image object, and thus detailed description thereof is omitted.

  In the first surface 801, a first surface peripheral partition wall portion 802 is provided so as to stand vertically from the base surface so as to surround the peripheral surface of the base surface. The inner area surrounded by the first surface peripheral partition wall 802 is shielded by a cover body described later.

  Further, in the inner area surrounded by the first surface peripheral partition wall portion 802 in the first surface 801, a first surface partitioning partition wall portion 803 standing in a vertical direction from the substrate surface is provided, and the first surface A partition wall is formed between the unit cells 100 adjacent to each other, and an independent storage chamber for storing the unit cells 100 is provided. Further, the first surface partition partition 803 also functions as a partition of the unit battery 100 located at the end arranged in a line. On the first surface 801 side by the first surface partitioning partition 803, a total of four units of a first battery housing chamber 807, a second battery housing chamber 808, a third battery housing chamber 809, and a fourth battery housing chamber 810 are provided. An accommodation space for the battery 100 can be configured.

  The one end side of the first surface 801 and the other end side opposite to the first surface 801 are located between the first surface peripheral partition wall portion 802 and the first surface partitioning partition wall portion 803, and are perpendicular to the substrate surface. An upright first surface intermediate partition 805 is provided. A space between the first surface partitioning partition wall portion 803 and the first surface intermediate partition wall portion 805 is a first surface sense line accommodating portion 811 for providing a sense line for detecting a tab potential of the unit battery 100. Used.

  The second surface 812 has a configuration substantially the same as that of the first surface 801 and has a total of four units of a fifth battery storage chamber 818, a sixth battery storage chamber 819, a seventh battery storage chamber 820, and an eighth battery storage chamber 821. An accommodation space for the battery 100 is provided. In the battery housing body 800, a total of eight unit batteries 100 are housed on the first surface 801 and the second surface 812 together.

  As described above, the unit battery housing body 800 includes four unit batteries of the first battery housing chamber 807, the second battery housing chamber 808, the third battery housing chamber 809, and the fourth battery housing chamber 810 on the first surface 801. 100 storage chambers, and the second surface 812 accommodates four unit cells 100 of a fifth battery storage chamber 818, a sixth battery storage chamber 819, a seventh battery storage chamber 820, and an eighth battery storage chamber 821. It has a chamber and a total of eight storage chambers for the unit cells 100 on both sides. Assuming that one unit battery 100 is housed in one battery housing chamber, the unit battery housing body 800 according to the present embodiment can house a maximum of 8 unit batteries 100. In the battery module of the present invention, the number of unit batteries 100 that can be accommodated in the unit battery housing 800 is not limited to this example, and if both sides of the unit battery housing 800 are used, The number of unit batteries 100 that can be accommodated in the unit battery housing 800 can be any number.

  At one end of the unit battery housing 800 (the end on the side where the first battery housing chamber 807 and the eighth battery housing chamber 821 are arranged), a first power source for the unit batteries 100 connected in series can be taken out. A first connector housing recess 824, which is a space in which the connector 828 is disposed, is provided.

FIG. 5 is a view for explaining attachment of the first connector 828 to the battery housing body 800, and FIG. 5 (B) is an enlarged view of a main part of FIG. 5 (A). A first connector attachment opening 825 for attaching the first connector 828 and first connector attachment screw holes 826 are provided on both sides of the side wall of the unit battery housing 800, and the first connector 828 is connected to the first connector 828. The first connector 828 is fixed to the battery housing 800 by fitting into the one connector attachment opening 825 and screwing the attachment screw 829 into the first connector attachment screw hole 826. In the vicinity of the first connector housing recess 824, a power line opening 827 that penetrates the first surface 801 and the second surface 812 is provided, and the power source of the first connector 828 provided on the first surface 801 side is provided. The line 881 can be routed to the second surface 812 side.

  At one end of the unit battery housing 800, the end from which the fourth battery housing chamber 810 and the fifth battery housing chamber 818 are disposed) is output from the sense line and the thermistor connection line from the unit battery 100. A second connector mounting recess 832 is provided, which is a space in which the second connector 840 from which the connector can be taken out is arranged.

  From the second connector 234, the potential information of the tabs of the unit batteries 100 connected in series and the temperature information in the module can be taken out. The battery management circuit unit 1100 to be described later can manage each unit cell 100 based on such potential information on the tab of each unit cell 100.

  When the battery module 1000 is mounted on the power storage device 1200, the position of the battery module 1000 is regulated by the rail member, and the battery module 1000 is fitted to a connector (seventh connector 1152 described later) at the back of the housing of the power storage device 1200. At this time, if there is a tolerance in the rail member or the like, it is difficult to fit the second connector 840 and the seventh connector 1152 together. Therefore, the second connector 840 is configured to be slightly displaceable so as to cover the tolerances as described above.

  Such a second connector 840 will be described with reference to FIGS. FIG. 6 is a view for explaining the attachment of the second connector 840 to the connector attachment panel 847, FIG. 7 is a view for explaining the attachment of the connector attachment panel 847 to the battery housing 800, and FIG. 8 is the battery housing. 8 is a front view of a second connector 840 attached to 800. FIG.

  Two through holes 843 (not shown in FIG. 6) are provided at both ends of the main body portion 841 of the second connector 840, and bushes 844 are attached to the two through holes 843, respectively. The outer diameter of the bush 844 is smaller than the inner diameter of the through-hole 843 by 2Δb, so that the main body portion 841 of the second connector 840 can be displaced by 2Δb with respect to the bush 844.

  The second connector 840 is fitted into the connector mounting opening 848 of the connector mounting panel 847, and is inserted and screwed into the connector mounting screw hole 849, the bush 844, and the female screw hole 853 of the fastening member 852. It is fixed to the connector mounting panel 847 by a mounting screw 850 to be attached. Therefore, the second connector 840 can be displaced by a displacement amount of 2Δb with respect to the connector mounting panel 847.

  The panel attachment base 833 in the second connector attachment recess 832 is provided with a screw hole peripheral protrusion 835 that protrudes from a plane that forms the panel attachment base 833. A panel attachment screw hole 834 used for attaching the connector attachment panel 847 to the battery housing body 800 is provided at the center.

The outer diameter of the screw hole peripheral projection 835 inserted into the mounting notch 851 provided on both sides of the connector mounting panel 847 is 2Δa smaller than the inner side of the mounting notch 851, and the connector The attachment panel 847 can be displaced by 2Δa with respect to the battery housing body 800.

  The connector attachment panel 847 to which the second connector 840 is attached has a battery attached by a connector attachment screw hole 849, a retaining washer 837, an attachment notch 851, and an attachment screw 836 inserted through the panel attachment screw hole 834. It is attached to the container 800.

  The connector mounting panel 847 can be displaced by 2Δa with respect to the battery housing body 800, and the second connector 840 can be displaced by 2Δb with respect to the connector mounting panel 847, so that the second connector 840 can be displaced with respect to the battery housing body 800. Displacement of 2Δa + 2Δb is possible. Here, by setting the dimensional relationship of Δa> Δb, the second connector 840 of the battery module 1000 that is guided while being regulated by the rail member fits the seventh connector 1152 more smoothly.

  In the unit battery housing 800 (the end on the side where the first battery housing chamber 807 and the eighth battery housing chamber 821 are arranged), the handle penetrates between the first surface 801 and the second surface 812. A hole 854 is provided, and the handle through-hole 854 and its periphery function as a handle portion 855. Such a handle part 855 improves the handleability of the battery module.

  Between the fourth battery housing chamber 810 on the first surface 801 and the fifth battery housing chamber 818 on the second surface 812 in the unit battery housing body 800, the first surface 801 and the second surface 812 are penetrated. A bus bar routing through hole 867 is provided.

  In the battery module according to the present invention, the batteries arranged in each battery housing chamber are connected in series. The bus bar routing through hole 867 allows the inter-surface bus bar 877 to be connected to the fourth battery housing chamber 810 on the first surface 801. , The second surface 812 and the fifth battery housing chamber 818 can be straddled, so that the unit battery 100 and the fifth battery housing chamber 818 are housed in the fourth battery housing chamber 810. The unit battery 100 can be electrically connected via an inter-surface bus bar 877.

  A plurality of unit cell alignment protrusions 860 are provided in the respective storage chambers of the first battery storage chamber 807 to the eighth battery storage chamber 821 so as to stand up from the base surface or the back surface of the base. Further, these unit battery alignment protrusions 860 are reinforced by a cross-shaped reinforcing rib 859 (see FIG. 4) standing from the base, so that even if a long-term vibration or impact is applied to the battery module, The battery alignment protrusion 860 is not easily broken.

  The plurality of unit cell alignment protrusions 860 on one end side in each storage chamber are in the alignment through hole 124 of the positive electrode pull-out tab 120, and the plurality of unit battery alignment protrusions 860 on the other end side are negative electrodes. The unit tab 100 can be fitted into the alignment through hole 134 of the drawer tab 130, thereby enabling the unit battery 100 to be quickly aligned and set in the unit battery housing 800, which is effective in terms of manufacturing efficiency. is there.

  Each storage chamber is provided with a tab member placement portion 861 erected from the plane of the substrate surface or the substrate back surface. When the unit battery 100 is set in the unit battery housing body 800, the tab member mounting portion 861 is arranged so that the positive electrode pull-out tab 120, the negative electrode pull-out tab 130 of the unit battery 100, and the bus bar disposed between these tabs from the plane. This is a configuration for maintaining a state separated by a predetermined distance.

  A tab member fixing screw hole 862 is provided in a part of the tab member mounting portion 861, and (1) the unit battery 100 is accommodated in the unit battery by screwing using the tab member fixing screw hole 862. It can be mechanically fixed to the body 800, (2) the tab can be electrically connected to the bus bar of the unit battery housing 800, and (3) the tab can be electrically connected to the sense line and the power line. It has become. The tab member fixing screw hole 862 is preferably provided in such a manner that a metal cylindrical body with a screw pattern cut on the inner periphery is embedded in a unit battery housing 800 formed of resin by integral molding.

  A part of the tab member fixing screw hole 862 in the tab member mounting portion 861 is provided with a cross-shaped rib structure so that the tab member fixing screw hole 862 is reinforced. Further, in the tab member fixing screw hole 862, at a portion where the inter-tab member bus bar 876 is provided, an inter-screw hole bridging portion 863 is provided between adjacent tab member fixing screw holes 862, so that the tabs can be stably provided. The inter-member bus bar 876 can be placed. Further, a bus bar positioning projection 864 is provided on the upper surface of the inter-screw hole bridging portion 863. By fitting the bus bar positioning projection 864 into a through hole provided in advance in the inter-tab member bus bar 876, a tab is provided. The inter-member bus bar 876 can be easily set, and the production efficiency is improved.

  Further, the positive electrode pull-out tab 120 of the unit battery 100 housed in the first battery housing chamber 807 on the first surface 801 and the negative electrode pull-out tab of the unit battery 100 housed in the eighth battery housing chamber 821 on the second surface 812. Each 130 is connected to a power line in addition to the sense line. In order to fix the end bus bar 875 used for this purpose, an end bus bar fixing frame 865 is provided in each storage chamber.

  A first end-side protruding guide member 870 is provided at one end of the outer periphery of the unit battery housing 800, and a second end-side protruding guide member 872 is provided at the other end facing the end. ing. The first end-side protruding guide member 870 and the second end-side protruding guide member 872 have a structure in which convex portions are continuous in the longitudinal direction, and the concave guide member 1145 in the rail member, which will be described later, By sliding the, the battery module 1000 according to the present invention can be accommodated in the housing of the power storage device 1200.

  As described above, tapered portions 871 are provided at both ends of the first end-side protruding guide member 870 and tapered portions 873 are provided at both ends of the second end-side protruding guide member 872, respectively. When the battery module 1000 is inserted into the concave guide member 1145 in the rail member, the insertion becomes easy and the handleability is improved. Further, when removing the battery module 1000 from the concave guide member 1145 in the rail member, each taper portion becomes associative, so that it is not necessary to pay attention to the direction in which the battery module 1000 is pulled out, and the handleability is improved.

  The battery module 1000 is connected to the power storage device 1200 in an unexpected posture by using different widths of the first end-side protruding guide member 870 and the second end-side protruding guide member 872. Accordingly, it is possible to prevent being inserted and removed. The width of the first end-side protruding guide member 870 or the width of the second end-side protruding guide member 872 can be defined as a length viewed in a direction perpendicular to the substrate surface or the substrate back surface.

  Each of the first end-side protruding guide member 870 and the second end-side protruding guide member 872 is a side surface different from the substrate surface and the substrate back surface, and the two opposing side surfaces have a planar direction on the substrate surface or substrate back surface. It is provided along.

  The first end-side protruding guide member 870 and the second end-side protruding guide member 872 are provided so as to protrude from the peripheral partition wall (802, 813) or extend from the base body. Moreover, it can be said that each taper part changes the protrusion amount which protrudes, or the extended amount which extends.

  In the unit battery housing 800, the unit battery 100 and various wirings arranged on the first surface 801 are connected by the first surface cover body 910, and the unit battery 100 and various wirings arranged on the second surface 812 are secondly connected. A structure that is shielded by the surface cover body 920 is adopted.

  For this purpose, 16 cover body fixing screw holes 869 used for screwing the first surface cover body 910 to the first surface 801 with screws are provided in the first surface 801. Similarly, sixteen cover body fixing screw holes 869 used for screwing the second surface cover body 920 to the first surface 220 with screws are similarly provided on the second surface 812. Although 16 cover body fixing screw holes 869 are provided on each surface, it is not necessary to screw all the cover body fixing screw holes 869. Further, the number of cover body fixing screw holes 869 provided on one surface is not limited to 16 and may be an arbitrary number.

  Next, the process of assembling each part such as the unit battery 100 to the unit battery housing 800 configured as described above to form a battery module according to the present invention will be described.

  In the process shown in FIG. 9, electrical connection between the unit battery 100 accommodated in the fourth battery accommodating chamber 810 on the first surface 801 and the unit battery 100 accommodated in the fifth battery accommodating chamber 818 on the second surface 812 is performed. The inter-surface bus bar 877 used for the purpose is set. The inter-surface bus bar 877 is routed through the bus bar, inserted into the through-hole 867, and the through-hole provided in the inter-surface bus bar 877 is fitted to the bus bar positioning protrusion 864, whereby the inter-surface bus bar 877 is attached. A through hole corresponding to the tab member fixing screw hole 862 is also provided in the inter-surface bus bar 877 in advance.

  In the process shown in FIG. 10, the inter-tab member bus bar 876 is set on the tab member mounting portion 861 by fitting the through hole provided in the inter-tab member bus bar 876 to the bus bar positioning protrusion 864. The inter-tab member bus bar 876 is also provided with a through hole corresponding to the tab member fixing screw hole 862 in advance. In this step, the end bus bar 875 is set on the end bus bar fixing frame 865. The end bus bar 875 is also provided with a through hole corresponding to the tab member fixing screw hole 862 in advance. Further, an adhesive is applied to the shaded portion in each battery housing chamber.

  In the subsequent step shown in FIG. 11, the unit battery 100 is placed in each of the first battery housing chamber 807, the second battery housing chamber 808, the third battery housing chamber 809, and the fourth battery housing chamber 810 to which the adhesive is applied. To accommodate. At this time, by passing the alignment through hole 124 of the positive electrode pull-out tab 120 of the unit battery 100 and the plurality of alignment through holes 134 of the negative electrode pull-out tab 130 through the unit battery alignment protrusions 860 of the battery container 800, respectively. Alignment can be performed easily and production efficiency is good. In the figure, a (+) mark is written on the side where the positive electrode pull-out tab 120 of the unit battery 100 is pulled out, and a (−) mark is written on the side where the negative electrode pull-out tab 130 is pulled out.

  As shown in FIG. 11, the polarities of the tabs of the unit cells 100 housed in adjacent battery housing chambers are different on one end side of the battery housing body 800. Thus, when the tabs of the unit batteries 100 are electrically connected via the inter-tab member bus bar 876, a series connection is configured.

  In the present embodiment, a plurality of unit cells 100 are arranged in one direction in a direction perpendicular to the pull-out direction of the pull-out tabs of the unit cells 100, and the tabs of adjacent unit cells 100 are electrically connected to each other. In addition, the unit batteries 100 can be connected in series.

  In the step shown in FIG. 12, the tab member bus bar 876 and the tab of the unit battery 100 are electrically and mechanically fixed by the screw 889 using the tab member fixing screw hole 862. Here, the sense line terminal 888 is also fixed to one screw 889 of the two screws 889 for fixing the inter-tab member bus bar 876. The sense line terminal 888 is electrically connected to the second connector 840 by the sense line 887 arranged in the first surface sense line accommodating portion 811 and can output the potential information of the tab of the unit battery 100 from the second connector 840. The

  The additional tab member 140 of the unit battery 100 in the first battery housing chamber 807 is electrically and mechanically fixed to the power line terminal 882, the sense line terminal 888, and the end bus bar 875 on the end bus bar 875 by screws 889. Is given. The power line terminal 882 is electrically connected to the first connector 828 by the power line 881, and a positive output as a battery module can be taken out from the first connector 828.

  Further, a thermistor 886 for monitoring the temperature of the battery module 1000 is provided between the two first surface partitioning partition walls 803 between the second battery housing chamber 808 and the third battery housing chamber 809. Yes. The thermistor 886 and the second connector 840 are electrically connected to each other through a thermistor connection line 885, and the temperature information of the battery module 1000 can be output from the second connector 840.

  In the subsequent step shown in FIG. 13, the first surface cover body 910 is attached to the first surface 801 of the battery housing body 800 with a screw 930. Here, the first surface cover body 910 will be described with reference to the perspective view of FIG. Since the first surface cover body 910 and the second surface cover body 920 have the same configuration except that they are mirror-symmetrical, the first surface cover body 910 will be described below as an example.

  The first surface cover body 910 is an aluminum cover member that shields the unit battery 100, the power supply line 881, the sense line 887, the thermistor 886, and the like housed in the first surface 801 of the unit battery housing body 800.

  When the first surface cover body 910 is attached to the first surface 801, the first surface cover body 910 has a drawing process (battery pressing drawing process) for pressing the unit cells 100 housed in the battery housing chambers. Part 911). In addition, a surface that presses the unit battery 100 by the battery press drawing unit 911 is defined as a pressing surface 912. The pressing surface 912 based on the battery pressing / drawing portion 911 presses the electrode lamination region 105 of the unit battery 100 when the first surface cover body 910 is mounted, thereby suppressing expansion or the like due to aging of the unit battery 100. It has the effect of extending the life of 100. The unit battery 100 and the pressing surface 912 of the first surface cover body 910 are fixed with an adhesive or the like, and restrict the movement of the unit battery 100 in the battery module.

  Further, the first surface cover body 910 is formed with a screw hole 914 at a position corresponding to the cover body fixing screw hole 869 when the first surface cover body 910 is attached to the first surface 801. A screw hole drawing portion 913 is provided around the screw hole 914 so that the first surface cover body 910 and the first surface 801 around the screw hole 914 are in close contact with each other. Is fixed.

In the subsequent step shown in FIG. 14, the inter-tab member bus bar is formed by fitting the through hole provided in the inter-tab member bus bar 876 on the second surface 812 of the battery housing 800 to the bus bar positioning protrusion 864. 876 is set on the tab member mounting portion 861. The inter-tab member bus bar 876 is also provided with a through hole corresponding to the tab member fixing screw hole 862 in advance. In this step, the end bus bar 875 is set on the end bus bar fixing frame 865. The end bus bar 875 is also provided with a through hole corresponding to the tab member fixing screw hole 862 in advance. Further, an adhesive is applied to the shaded portion in each battery housing chamber.

  In the subsequent step shown in FIG. 15, the second surface 812 of the battery housing body 800 has a fifth battery housing chamber 818, a sixth battery housing chamber 819, a seventh battery housing chamber 820, The unit battery 100 is accommodated in each of the eight battery accommodating chambers 821. At this time, by passing the alignment through hole 124 of the positive electrode lead tab 120 of the unit battery 100 and the plurality of alignment through holes 134 of the negative electrode lead tab 130 through the unit battery alignment protrusion 860 of the battery housing 800, Positioning can be performed easily and manufacturing efficiency is good. In the figure, a (+) mark is written on the side where the positive electrode pull-out tab 120 of the unit battery 100 is pulled out, and a (−) mark is written on the side where the negative electrode pull-out tab 130 is pulled out. As shown in FIG. 15, the polarities of the tabs of the unit batteries 100 accommodated in the adjacent battery accommodating chambers are different on one end side of the battery accommodating body 800. Thus, when the tabs of the unit batteries 100 are electrically connected via the inter-tab member bus bar 876, a series connection is configured.

  In the present embodiment, a plurality of unit cells 100 are arranged in one direction in a direction perpendicular to the pull-out direction of the pull-out tabs of the unit cells 100, and the tabs of adjacent unit cells 100 are electrically connected to each other. In addition, the unit batteries 100 can be connected in series.

  The tab member bus bar 876 and the tab of the unit battery 100 are electrically and mechanically fixed by the screw 889 using the tab member fixing screw hole 862. Here, the sense line terminal 888 is also fixed to one screw 889 of the two screws 889 for fixing the inter-tab member bus bar 876. The sense line terminal 888 is electrically connected to the second connector 840 by the sense line 887 arranged in the first surface sense line accommodating portion 811 and can output the potential information of the tab of the unit battery 100 from the second connector 840. The

  The negative electrode pull-out tab 130 of the unit battery 100 in the eighth battery housing chamber 821 is electrically and mechanically fixed to the power line terminal 882, the sense line terminal 888, and the end bus bar 875 on the end bus bar 875 by screws 889. Is given. The power line terminal 882 is electrically connected to the first connector 828 through the power line 881, and a negative output as a battery module can be taken out from the first connector 828.

  In the subsequent step shown in FIG. 16, the second surface cover body 920 is attached to the second surface 812 of the battery housing body 800 with a screw 930.

  In the subsequent step shown in FIG. 17, the cap member 891 is attached to the first connector 828. The conductive terminal of the first connector 828 is in a state where a voltage corresponding to the eight unit batteries 100 connected in series is applied. Therefore, in order to ensure safety in handling the battery module 1000, the first connector 828 is shielded by such a cap member 891. The cap member 891 is provided with two locking pieces 892, and the two locking pieces 892 are inserted into the two locking holes 890 provided on the side wall portion of the battery housing body 800 corresponding thereto. By inserting, the cap member 891 can be mounted so as to cover the first connector 828. The cap member 891 is removed when the battery module 1000 is attached to the power storage device 1200.

  Through the above steps, the battery module 1000 as shown in the perspective view of FIG. 19 is completed. Here, with reference to FIG. 20, the characteristic point of the battery module 1000 which concerns on embodiment is demonstrated.

  In the case of a battery module in which a laminated battery is incorporated in a casing, the periphery of the laminated battery is fixed to the casing by adhesion or the like, or the drawer tab of the battery is screwed, so that the unit battery is in the casing. Even if it is fixed inside, the electrode laminate provided in the laminate film is slightly displaced, so if a long-time vibration or impact is applied to the battery module, the electrode laminate will be Finally, the laminate film is broken and the electrolyte solution leaks, the current collector electrically connecting the electrode laminate and the drawer tab is broken, or the drawer tab is broken. There's a problem.

  Therefore, in the battery module 1000 according to the present invention, by disposing the movement restricting member 170 for each unit battery 100 accommodated in the battery module 1000 so that the above problem does not occur, The movement of the electrode laminate 60 in the laminate film exterior material 90 is limited as much as possible.

  FIG. 20 is a diagram for explaining an arrangement state of the movement restricting member 170 in the battery module 1000 according to the embodiment of the present invention.

  20A is a plan view of the battery module 1000, and FIG. 20B is a cross-sectional view taken along line AA shown in FIG. 20A. This cross-sectional view is a view in which a substantially center in the width direction of the drawer tab of the unit battery 100 housed in the battery housing body 800 is seen.

  As shown in the drawing, the movement restricting member 170 is disposed so as to sandwich the positive electrode pull-out tab 120 (or the negative electrode pull-out tab 130) from both sides, and further, the unit battery housing body 800 and the first surface cover body 910. (Or the second surface cover body 920) and is fixed in a compressed form. Thereby, even when vibration / impact is applied to the battery module 1000, the displacement of the electrode laminate 60 accommodated in the laminate film exterior member 90 of the unit battery 100 is suppressed as much as possible.

  Next, a mechanism for suppressing the movement of the electrode stack 60 by the movement restricting member 170 will be described in more detail. FIG. 21 is a schematic cross-sectional view for explaining the effect of the movement restricting member 170 in the battery module 1000 according to the embodiment of the present invention, and is an enlarged view of an enclosing portion indicated by B in FIG.

  In the drawing, the cross section of the internal structure of the unit cell 100 is also schematically shown. The electrode laminate 60 is accommodated in the laminate film exterior material 90, and a plurality of gaps are provided between the electrode laminate 60 and the extraction tab. It is shown that a conductive connection by the current collector 70 is provided.

  Further, in the figure, “X” indicates a portion fixed by a double-sided tape or an adhesive. As shown in the figure, the movement restricting member 170 is disposed on the lower surface side of the upper surface side of the laminate film exterior member 90 holding the drawer tab, and the movement restricting member 170 and the laminate film exterior member 90 are It is in a fixed state.

  Further, the upper side of the laminate film exterior material 90 in the unit battery 100 is fixed by adhesion to the case body, and the lower side of the laminate film exterior material 90 is fixed by adhesion to the unit battery housing.

  In the configuration as described above, for example, even when acceleration in the left direction of FIG. 21 is applied and the electrode laminate 60 is about to be displaced to the left side, the movement restricting member fixed to the laminate film exterior member 90 of the unit battery 100 170 suppresses the movement of the electrode stack 60 as much as possible.

  Next, a plurality of alignment through holes 124 are provided in the positive electrode pull-out tab 120 of the unit battery 100, and a plurality of alignment through holes 134 are also provided in the negative electrode pull-out tab 130. The merit of attaching the unit battery 100 to the battery module 1000 by penetrating the unit battery alignment protrusions 860 provided therethrough will be described.

  FIG. 22 is a diagram showing test results of the embodiment of the present invention and a comparative example. FIG. 22 shows test item T3 (vibration test) defined in the UN Recommendations on the Transport of Dangerous Goods (UN3480) for the battery module according to the comparative example and the battery modules of Example 1 and Example 2 according to the present invention. ) And the test module T4 (impact test), the battery module state is summarized.

  In the battery module according to Comparative Example 1, only one alignment protrusion is provided for each drawer tab, and no cross-shaped reinforcing rib around the alignment protrusion is provided. The movement restricting member is also omitted.

  As described above, the battery module according to Example 1 has a configuration in which a plurality of alignment protrusions are provided for one drawer tab, and both the cross-shaped reinforcing rib and the movement restricting member are employed.

  In the battery module according to the second embodiment, only one alignment protrusion is provided for each drawer tab, and the cross-shaped reinforcing ribs around the alignment protrusion are not provided. The movement restricting member is provided.

  The above tests were carried out on the three types of battery modules as described above, leakage of the electrolyte, damage to the current collector, breakage in the ultrasonic weld, cracks, twists, breakage of the positive lead tab, negative lead tab The table of FIG. 22 summarizes the incidence of breakage and breakage of the alignment protrusion.

  Referring to FIG. 22, it can be seen that the movement restricting member acts effectively on the battery module against vibration and impact. Furthermore, according to the configuration according to the first embodiment in which a plurality of alignment protrusions are provided for one pull-out tab, and a cross-shaped reinforcing rib is provided around this, it is possible to eliminate the occurrence of trouble. It becomes.

  Thus, by providing a plurality of alignment through holes with respect to one drawer tab and configuring the battery module so that the alignment protrusions are inserted through these alignment through holes, the battery module can be provided for a long time. It can be seen that it is possible to improve the durability when a vibration or impact is applied.

As described above, according to the battery module 1000 according to the present invention, the movement restricting member 170 acts so as to restrict the movement of the electrode laminate 60 accommodated in the laminate film exterior material 90. Even if the vibration or impact is applied, the laminate film exterior material 90 is damaged and the electrolyte solution leaks, the current collector 70 electrically connecting the electrode laminate 60 and the drawer tab is broken, or The probability that the drawer tab is broken or the like is reduced, and a battery module having excellent vibration resistance and impact resistance can be provided.

  Next, another embodiment of the present invention will be described. FIG. 23 is a schematic cross-sectional view for explaining the effect of the movement restricting member 170 in the battery module 1000 according to another embodiment of the present invention, and is a view corresponding to FIG. 21 of the battery module in another embodiment. Hereinafter, only the points where the battery modules according to the other embodiments are different from the battery modules according to the previous embodiments will be described.

  In the battery module according to the embodiments described so far, the movement restricting member 170 is a surface including both the stacking direction of the electrode stack 60 and the pulling direction of the positive electrode pulling tab 120 (or the negative electrode pulling tab 130). The movement restricting member 170 having a rectangular cross section is used.

  In contrast, in the battery module according to the present embodiment, the movement restricting member 170 is a surface including both the stacking direction of the electrode stack 60 and the pulling direction of the positive electrode pulling tab 120 (or the negative electrode pulling tab 130). A movement restricting member 170 having a trapezoidal cross section is used.

  The movement restricting member 170 having such a cross-sectional shape can be attached along the slope of the laminate film exterior material 90 from the electrode laminate 60 to the extraction tab (the slope corresponding to the current collector 70). In this configuration, the movement of the electrode stack 60 due to vibration and impact is more effectively limited.

  According to the battery module 1000 according to the other embodiment as described above, even if the battery module 1000 is subjected to vibration or impact for a long time, the laminate film exterior material 90 is damaged and the electrolyte solution leaks, or the electrode stack is laminated. Providing a battery module having excellent vibration resistance and impact resistance by reducing the probability that the current collector 70 electrically connecting the body 60 and the drawer tab is broken or the drawer tab is broken. it can.

  Next, another embodiment of the present invention will be described. FIG. 24 is a schematic cross-sectional view for explaining the effect of the movement restricting member 170 in the battery module 1000 according to another embodiment of the present invention, and is a view corresponding to FIG. 21 of the battery module in another embodiment. Hereinafter, only the points where the battery modules according to the other embodiments are different from the battery modules according to the previous embodiments will be described.

  In the battery module according to the present embodiment, the cross section obtained by cutting the movement restricting member 170 is a plane including both the stacking direction of the electrode stack 60 and the pulling direction of the positive electrode pulling tab 120 (or the negative electrode pulling tab 130). A movement restricting member 170 having a long hole shape is used.

The movement restricting member 170 having such a cross-sectional shape has a portion having a long hole curvature,
It becomes possible to attach the laminated film outer packaging material 90 from the electrode laminated body 60 to the pull-out tab by pressing the slope (the slope corresponding to the current collector 70). It is the structure which restrict | limits a movement more effectively.

  In the present embodiment, the movement restricting member 170 is not only fixed to the laminate film exterior material 90 of the unit battery 100 with a double-sided tape, but also to the base of the battery housing body and the cover body. It is configured to be fixed by an adhesive or the like. In FIG. 24, “x” indicates a portion fixed by a double-sided tape or an adhesive. According to the present embodiment as described above, the displacement of the movement restricting member 170 itself due to vibration and impact is further restricted, and the movement of the electrode stack 60 can be more effectively restricted.

  In the present embodiment, the movement restricting member 170 is fixed to all of the unit battery 100, the base of the battery housing body, and the cover body. However, the battery module 1000 according to the present invention includes: If the movement restricting member 170 is fixed to any one of the unit battery 100, the base body of the battery housing, and the cover body, the effect can be sufficiently exerted.

  According to the battery module 1000 according to the other embodiment as described above, even if the battery module 1000 is subjected to vibration or impact for a long time, the laminate film exterior material 90 is damaged and the electrolyte solution leaks, or the electrode stack is laminated. Providing a battery module having excellent vibration resistance and impact resistance by reducing the probability that the current collector 70 electrically connecting the body 60 and the drawer tab is broken or the drawer tab is broken. it can.

  Next, an outline of the configuration of the battery management circuit unit 1100 that manages the battery module 1000 according to the present invention as described above will be described. 25, 26, and 27 are diagrams for explaining a manufacturing process of the battery management circuit unit 1100. FIG. FIG. 28 is a diagram showing the battery management circuit unit 1100.

  In the process shown in FIG. 25, the third connector 1111 and the fourth connector 1112 are attached to the connector panel 1110 with screws 1115. The battery management circuit unit 1100 preferably has substantially the same dimensions as the battery module 1000 in consideration of the ease of attachment to the power storage device 1200. However, if the circuit board 1120 alone is used to secure the dimensions, there is a problem in terms of cost. Therefore, the connector panel 1110 is used.

  In the process shown in FIG. 26, a side plate 1125 partially provided with a vent hole 1126 for cooling the circuit is attached to a circuit board 1120 on which a circuit for battery management is mounted, and a screw hole 1127 of the circuit board 1120 is used. And are fixed by screws 1129.

  In the subsequent step shown in FIG. 27, the circuit board 1120 and the connector panel 1110 are fixed by screws 1130.

  In the process shown in FIG. 28, the lead wires 1114 of the third connector 1111 and the fourth connector 1112 provided on the connector panel 1110 are electrically connected to the terminals 1123 of the circuit board 1120.

  The battery management circuit unit 1100 configured as described above includes the third connector 1111, the fourth connector 1112, the fifth connector 1121, and the sixth connector 1122.

  Next, a power storage device 1200 including the battery management circuit unit 1100 and the battery module 1000 as described above will be described.

  FIG. 29 shows a housing 1140 of a power storage device 1200 in which the battery module 1000 according to the embodiment of the present invention is used. As shown in the figure, an upper rail member 1141, a middle rail member 1142, and a lower rail member 1143 are provided in the housing 1140. The lower surface of the upper rail member 1141, the upper surface, the lower surface, and the lower rail of the middle rail member 1142 are provided. A concave guide member 1145 that is used when the battery module 1000 is slid and set in the power storage device 1200 is provided on the upper surface of the member 1143.

A relay board 1150 is provided on the back side of the housing 1140 of the power storage device 1200. FIG. 30 is a view of the relay board 1150 as seen from the front of the power storage device 1200. The relay board 1150 includes a seventh connector 1152 into which the second connector 840 of each battery module 1000 is fitted, an eighth connector 1153 into which the fifth connector 1121 and the sixth connector 1122 of the battery management circuit unit 1100 are fitted, respectively. A ninth connector 1154 is provided and wiring (not shown) is provided, so that sense information and temperature information of each battery module 1000 can be relayed to the battery management circuit unit 1100 side. Thereby, the battery management circuit unit 1100 acquires the potential data of each unit battery 100 and the temperature data in each battery module 1000, and performs control such as discharge stop based on this data.

  FIG. 31 shows a state in which the battery module 1000 is slid and set in the housing 1140 of the power storage device 1200 using the concave guide member 1145 of the rail member. At this time, the second connector 840 of the battery module 1000 must be fitted into the seventh connector 1152 of the relay board 1150 on the back side of the housing 1140.

  When there is a tolerance in the rail member or the like, it is difficult to fit the second connector 840 and the seventh connector 1152. Therefore, the second connector 840 is configured to be slightly displaceable so as to cover the tolerances as described above.

  A configuration for enabling the above displacement will be described. FIG. 32 is a diagram illustrating a configuration around the second connector 840 of the battery module 1000 according to the embodiment of the present invention, and FIG. 32A is a diagram of the second connector 840 of the battery module 1000 viewed from the front. 32B is a cross-sectional view taken along the line AA in FIG. 32A, and FIG. 32C is a cross-sectional view taken along the line BB in FIG. 32A.

  As shown in FIG. 32B, the panel mounting base portion 833 of the battery housing body 800 is provided with a screw hole peripheral protruding portion 835 that protrudes from a plane that forms the panel mounting base portion 833. A panel mounting screw hole 834 for mounting the connector mounting panel 847 to the battery housing body 800 is provided at the center of the screw hole peripheral protrusion 835.

  As shown in the figure, the outer diameter of the screw hole peripheral projection 835 inserted into the mounting notch 851 provided on both sides of the connector mounting panel 847 is from the inner side of the mounting notch 851. The connector mounting panel 847 can be displaced by 2Δa with respect to the battery housing body 800.

  As shown in FIG. 32C, a bush 844 is attached to the through hole 843 of the second connector 840. The outer diameter of the bush 844 is smaller than 2Δb than the inner diameter of the through hole 843. Thus, the main body portion 841 of the second connector 840 can be displaced by 2Δb with respect to the bush 844.

  The connector mounting panel 847 can be displaced by 2Δa with respect to the battery housing body 800, and the second connector 840 can be displaced by 2Δb with respect to the connector mounting panel 847, so that the second connector 840 can be displaced with respect to the battery housing body 800. Displacement of 2Δa + 2Δb is possible.

Here, it is preferable to set a dimensional relationship of Δa> Δb. The second connector 840 of the battery module 1000 that is guided while being regulated by the rail member is roughly positioned with respect to the seventh connector 1152 with a tolerance of 2Δa, and further the second connector 840 and the seventh connector 1152. And the second connector 840 are fitted to the seventh connector 1152 with a tolerance of 2Δb. When the dimensional relationship of Δa> Δb is set, the second connector 840 can be more smoothly fitted to the seventh connector 1152 as described above.

  FIG. 33 shows a state where the battery management circuit unit 1100 is set in the housing 1140 of the power storage device 1200. At this time, the fifth connector 1121 and the sixth connector 1122 of the battery management circuit unit 1100 are fitted into the eighth connector 1153 and the ninth connector 1154 of the relay board 1150, respectively.

  34, the cap member 891 of each battery module 1000 is removed, and the battery modules 1000 are connected in series by the power line 1160. The power lines 1160 at both ends connected in series are input to the third connector 1111 of the battery management circuit unit 1100.

  As described above, the power storage device 1200 is completed by setting each battery module 1000 and the battery management circuit unit 1100.

  As described above, according to the battery module of the present invention, since the movement restricting member acts to limit the movement of the electrode laminate housed in the laminate film exterior material, the battery module is subjected to long-term vibration and impact. Even if it is added, the probability that the laminate film exterior material will break and the electrolyte will leak, the current collector that electrically connects the electrode stack and the drawer tab will break, or the drawer tab will break Therefore, a battery module having excellent vibration resistance and impact resistance can be provided.

60 ... Electrode laminate, 70 ... Current collector, 90 ... Laminate film exterior material, 100 ... Unit battery, 105 ... Electrode laminate region, 110 ... Battery body, 111 ································ 120 ······························································································ ..Additional tab member, 143... Welded portion, 145... Through-hole, 170... Movement restricting member, 800 ... unit battery housing, 801. 1 surface peripheral partition wall portion, 803... First surface partitioning partition wall portion, 805... First surface intermediate partition wall portion, 807... First battery storage chamber, 808. ... 3rd battery storage chamber, 810 ... 4th battery storage chamber 811: First surface sense line receiving portion, 812: Second surface, 813: Second surface peripheral partition wall portion, 814: Second surface partition wall portion, 815: Partition wall partition Notch part, 816 ... 2nd surface intermediate partition part, 817 ... Intermediate partition notch part, 818 ... 5th battery storage chamber, 819 ... 6th battery storage chamber, 820 ... 1st 7 battery housing chamber, 821... 8th battery housing chamber, 822... Second surface sense line housing portion, 824... First connector housing recess, 825. .. First connector mounting screw hole, 827... Power line opening, 828... First connector, 829... Mounting screw, 832... Second connector mounting recess, 833. Base part, 834 ... Panel mounting screw hole, 8 5 ... Screw hole peripheral protrusion, 836 ... Mounting screw, 837 ... Retaining washer, 840 ... Second connector, 841 ... Body part, 842 ... Metal terminal part, 843 ... Through hole, 844 ... Bush, 847 ... Connector mounting panel, 848 ... Connector mounting opening, 849 ... Connector mounting screw hole, 850 ... Mounting screw, 851 ... Mounting Notch, 852 ... Fastening member, 853 ... Female screw hole, 854 ... Handle through-hole, 855 ... Handle, 859 ... Cross-shaped reinforcing rib, 860 ... Unit battery position Alignment projection, 861 ... Tab member placement portion, 862 ... Tab member fixing screw hole, 863 ... Cross-connection portion between screw holes, 864 ... Bus bar positioning projection, 865 ... End bus bar Solid Fixed frame, 867 .. bus bar routing through hole, 869... Cover body fixing screw hole, 870... First end side protruding guide member, 871... Taper portion, 872. Guide member, 873 ... Tapered part, 875 ... End bus bar, 876 ... Bus bar between tab members, 877 ... Inter-surface bus bar, 881 ... Power line, 882 ... Power line terminal 883 ... Screw, 885 ... Thermistor connection line, 886 ... Thermistor, 887 ... Sense wire, 888 ... Sense wire terminal, 889 ... Screw, 890 ... Locking port, 891... Cap member, 892... Lock piece, 910... First surface cover body, 911... Battery press drawing unit, 912. Part, 914 ... screw hole, 915 ... Notch portion, 920... Second surface cover body, 921... Battery press drawing processing portion, 922... Pressing surface, 923 .. screw hole drawing processing portion, 924. ..Notched portion, 930 ... screw, 1000 ... battery module, 1100 ... battery management circuit unit, 1110 ... connector panel, 1111 ... third connector, 1112 ... fourth connector 1114: Lead wire, 1115 ... Screw, 1120 ... Circuit board, 1121 ... Fifth connector, 1122 ... Sixth connector, 1123 ... Terminal, 1125 ... Side plate, 1126 ... Ventilation hole, 1127 ... Screw hole, 1129 ... Screw, 1130 ... Screw, 1140 ... Housing, 1141 ... Upper rail member, 1142 ... Middle rail 1143 ... lower rail member, 1145 ... concave guide member, 1150 ... relay board, 1151 ... base material, 1152 ... seventh connector, 1153 ... eighth connector, 1154 ..Ninth connector, 1160 ... power line, 1200 ... power storage device

Claims (16)

A flat substrate having two main surfaces, a front surface and a back surface;
A unit battery having a pull-out tab drawn out from a laminate film exterior material that houses the electrode laminate;
A cover body for sandwiching the unit battery with the base body;
A battery module comprising: a movement restricting member disposed in a space between the drawer tab and the laminate film exterior member. The battery module according to claim 1, wherein a plurality of the movement restricting members are arranged so as to sandwich the drawer tab. The battery module according to claim 1, wherein the movement restricting member is made of an elastic material. The battery module according to claim 3, wherein the elastic material is a sponge. The battery module according to claim 3, wherein the elastic material is rubber. The cross section obtained by cutting the movement restricting member on a surface including both the stacking direction of the electrode stack and the pulling direction of the pulling tab is a rectangle. Battery module. The cross section obtained by cutting the movement restricting member on a surface including both the stacking direction of the electrode stack and the pulling direction of the pulling tab is a trapezoid. Battery module. The cross section of the movement restricting member cut along a plane including both the stacking direction of the electrode stack and the pulling direction of the pulling tab is a long hole shape. The battery module as described. D2> d1 between the length d1 of the electrode stack and the length d2 of the movement restricting member in a direction perpendicular to both the stacking direction of the electrode stack and the pulling-out direction of the extraction tab. The battery module according to any one of claims 1 to 8, wherein: 10. The structure according to claim 1, wherein a relationship of h <b> 2> h <b> 1 exists between a height h <b> 1 of the electrode laminate and a height h <b> 2 of the movement restricting member in the stacking direction of the electrode laminate. The battery module according to item. The battery module according to claim 1, wherein the movement restricting member is fixed to the unit battery. The battery module according to claim 1, wherein the movement restricting member is fixed to the base body. The battery module according to claim 1, wherein the movement restricting member is fixed to the cover body. The battery module according to any one of claims 1 to 13, wherein the drawer tab of the unit battery is provided with a plurality of through holes. The battery module according to claim 14, wherein the base is provided with a plurality of protrusions corresponding to the plurality of through holes. The battery module according to claim 15, wherein a cross-shaped reinforcing rib is provided around the plurality of protrusions.

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