JP4894198B2 - Assembled battery - Google Patents

Description

  The present invention relates to an assembled battery in which a plurality of batteries are housed in a casing to form a battery module, and a plurality of the battery modules are arranged and electrically connected.

  In general, a high-power and high-capacity assembled battery is formed by arranging a plurality of batteries and electrically connecting the batteries in series and / or in parallel. The assembled battery is widely used as a driving power source for a vehicle driving motor in an electric vehicle or a hybrid vehicle, an auxiliary power source for a fuel cell vehicle, or the like. Such an assembled battery is provided with a voltage detection line connected to the electrode of the battery, the voltage of each battery constituting the assembled battery or a predetermined number of batteries is detected via this voltage detection line, and the detected voltage The battery charging / discharging, capacity, and the like are controlled based on the above (see Patent Documents 1 and 2).

  In recent years, an assembled battery in which a plurality of flat batteries covered with an exterior material such as a laminate film are stacked has become widespread (see Patent Document 3). In this assembled battery, since each battery is flat (plate-shaped), a plurality of batteries can be arranged without gaps, and can be reduced in size as compared with an assembled battery in which conventional cylindrical batteries are arranged. . However, the flat battery itself is fragile, and care must be taken so that the battery is not damaged during the stacking operation of the assembled battery, resulting in poor workability. Further, it is difficult to increase the capacity of the battery due to the weakness of the flat battery, and it is necessary to configure a battery pack by connecting a large number of single cells.

Thus, for example, Patent Document 4 discloses that a battery module is formed by previously storing a predetermined number of flat batteries in a casing (case), and a plurality of battery modules are arranged to form an assembled battery. Therefore, according to this assembled battery, the laminating operation can be easily performed without worrying about the fragility of the flat battery.
JP-A-10-246112 Japanese Patent Laid-Open No. 2000-223095 JP 2003-323873 A JP 2001-256934 A

  However, as described above, the battery pack needs to be provided with a voltage detection line, and the voltage detection line connected to the electrode of each battery must be drawn out of the housing and wired to the voltage detection device (controller). I must.

  Therefore, the voltage detection line may interfere with a bus bar or the like that connects the electrode terminals of the battery module. In particular, an assembled battery using a flat type battery has a large number of batteries, so that there are a large number of voltage detection lines to be wired, and it is difficult to secure a wiring space for the voltage detection lines, and the wiring work becomes complicated. It was.

  An object of this invention is to provide the assembled battery which does not require the securing of the wiring space of a voltage detection line, or a complicated wiring operation, without interfering with the bus bar etc. which connect the electrode terminals of a battery module.

An assembled battery according to the present invention for achieving the above object is an assembled battery in which a plurality of batteries are housed in a housing to form a battery module, and a plurality of the battery modules are arranged and electrically connected.
Provide an output connector on one surface side of each battery module facing the other battery module, and provide an input connector that can connect the output connector of the battery module adjacent to the other surface side,
Each connector has multiple connector pins.
A voltage detection line connected to each battery electrode of the battery module is connected to one connector pin of the output connector, and transmitted from the connector pin of the input connector to each connector pin of the other system of the output connector. Wire the wire,
When arranging a plurality of battery modules, the output connector of the battery module is sequentially connected to the input connector of the adjacent battery module, and the output connector of the battery module located at the most upstream in the output direction is electrically connected to the voltage detection device. It is characterized by.

  According to the assembled battery configured as described above, the output connector of the battery module is sequentially connected to the input connector of the adjacent battery module, and the output connector of the battery module located at the most upstream in the output direction is electrically connected to the voltage detection device. Since the voltage detection line can be electrically connected to the voltage detection device simply by connecting, the wiring space of the voltage detection line can be secured or complicated without interfering with the bus bar connecting the electrode terminals of the battery module. An assembled battery that does not require wiring work can be realized.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an assembled battery according to the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a perspective view of a battery module that is a single unit when assembling the assembled battery of the first embodiment. FIG. 2 is a perspective view of an example of a flat battery. FIG. 3 is a perspective view of the battery modules stacked in the vertical direction.

  As shown in FIGS. 1 and 2, the battery module 20 forms a unit unit when assembling the assembled battery 80 (see FIG. 6), and a plurality of electrically connected flat batteries 10 are made of a metal casing. The body (module case) 23 is stacked and stored. The battery module 20 is a type of the assembled battery 80 in that it includes a plurality of electrically connected single cells. In the present specification, the battery module 20 is a unit unit for assembling an “assembled battery”. A unit formed by housing a plurality of single cells in the module case 23 is referred to as a “battery module”.

  As shown in FIG. 2, the flat battery 10 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 the exterior material 10a. In the battery 10, one end of the battery 10 is electrically connected to the power generation element and a plate-like electrode tab 10t (a general term for the plus-side electrode tab 10p and the minus-side electrode tab 10m) is led out from the exterior material 10a. The tab 10t extends on both sides of the battery 10 in the longitudinal direction. In the battery 10 including the stacked power generation element, it is necessary to apply pressure to the power generation element and hold it in order to maintain the battery performance by keeping the distance between the electrode plates uniform. For this reason, each battery 10 is accommodated in the module case 23 so that the power generation element is pressed down.

  As shown in FIG. 1, the module case 23 includes a first case 24 having a box shape in which an opening is formed, and a second case 25 forming a lid for closing the opening. The edge of the second case 25 is wound around the edge of the peripheral wall of the first case 24 by caulking. The first case 24 and the second case 25 are formed of a relatively thin steel plate or aluminum plate, and are given a predetermined shape by pressing. Positive and negative output terminals 21 and 22 are led out from the module case 23 through a notch formed in a part of the front wall of the first case 24.

  A pair of input / output connectors 40 and 40 are integrally provided on the front and rear surfaces of the module case 23 so as to be positioned between the output terminals 21 and 22. These input / output connectors 40, 40 are provided with an output connector 41 on the upper surface side of the upper and lower surfaces, which are opposite surfaces of the battery module 20, and an input capable of connecting the output connector 41 of the battery module 20 adjacent to the lower portion on the lower surface side A connector 42 is provided. In the present embodiment, for example, the output connector 41 located on the upper surface side of the battery module 20 is formed by a male connector, and the input connector 42 located on the lower surface side is formed by a female connector. May be reversed. That is, in the first embodiment, the output connector 41 and the input connector 42 are integrally formed as the input / output connector 40.

  When assembling the assembled battery 80 by arranging a plurality of battery modules 20, as shown in FIG. 3, the output connector 41 of the battery module 20 is sequentially connected to the input connector 42 of the battery module 20 stacked on top of the battery module 20, and the vertical direction Thus, a battery module group 20a can be formed in which three are stacked. In the battery module group 20a, the projecting output connector 41 functions as a spacer between the battery modules 20 and 20, thereby forming a gap S1.

  FIG. 4 is a schematic diagram showing a pin arrangement in the connector. FIG. 5 is a schematic diagram showing a wiring path of the connector.

  The main body of the input / output connector 40 is formed of, for example, plastic, and as shown in FIG. 4, a plurality of connector pins 50 are provided in the upper and lower connectors 41 and 42. In the present embodiment, one system is constituted by the 4-pin connector pins 50, and the number of the connector pins 50 corresponds to the number of the battery modules 20 arranged in the connector connecting direction. That is, in the present embodiment, the battery modules 20 are stacked in three stages in the vertical direction, so that a total of 12 connector pins 50 corresponding to the first, second, and third stages are provided.

  In each battery module 20, the voltage detection line 60 connected to each battery electrode (cell) of the battery module 20 is connected to one connector pin 50 of the output connector 41, and the other connector of the output connector 41. A transmission line 61 is wired for each system from the connector pin 50 of the input connector 42 to the pin 50, which will be described in detail with reference to FIG. In FIG. 5, for convenience of explanation, the left connector pin of the output connector 41 and the input connector 42 is referred to as 50A, the middle connector pin is referred to as 50B, and the right connector pin is referred to as 50C.

  As shown in FIG. 5, in the battery module 20 in the first stage, the voltage detection line 60 </ b> A connected to each battery electrode (cell) is connected to the connector pin 50 </ b> A of the left system of the output connector 41. A transmission line 61 </ b> A is wired from the left connector pin 50 </ b> A of the input connector 42 to the middle connector pin 50 </ b> B of the output connector 41. Further, a transmission line 61B is wired from the middle connector pin 50B of the input connector 42 to the right connector pin 50C of the output connector 41. In the present embodiment, in the battery module 20 at the first stage, the transmission lines 61A and 61B are free wiring.

  In FIG. 5, the voltage detection line 60 and the transmission line 61 are shown as a single line for convenience of explanation, but in actuality, the number corresponding to the number of connector pins of each system (in this embodiment, 4 each).

  The output connector 41 on the upper surface side of the first-stage battery module 20 is connected to the input connector 42 on the lower surface side of the second-stage battery module 20 stacked thereon. In the battery module 20 at the second stage, a voltage detection line 60B connected to each battery electrode (cell) is connected to the connector pin 50A of the left system of the output connector 41. A transmission line 61C is wired from the left connector pin 50A of the input connector 42 to the middle connector pin 50B of the output connector 41, and is electrically connected to the voltage detection line 60A of the battery module 20 at the first stage. ing. Further, a transmission line 61D is routed from the middle connector pin 50B of the input connector 42 to the right connector pin 50C of the output connector 41. In the present embodiment, in the battery module 20 at the second stage, the transmission line 61D is a free wiring.

  Further, the output connector 41 on the upper surface side of the second-stage battery module 20 is connected to the input connector 42 on the lower surface side of the third-stage battery module 20 stacked on the upper side. In the battery module 20 at the third stage, a voltage detection line 60 </ b> C connected to each battery electrode (cell) is connected to the left connector pin 50 </ b> A of the output connector 41. A transmission line 61E is wired from the left connector pin 50A of the input connector 42 to the middle connector pin 50B of the output connector 41, and is electrically connected to the voltage detection line 60B of the battery module 20 at the second stage. ing. Further, a transmission line 61F is wired from the middle connector pin 50B of the input connector 42 to the right connector pin 50C of the output connector 41, and the voltage of the first-stage battery module 20 is transmitted via the transmission line 61C. It is electrically connected to the detection line 60A.

  That is, in each battery module 20, the connector pin 50C of the right system of the input connector 42 is a free pin, and the transmission line connection between the output connector 41 and the input connector 42 is shifted laterally one by one and wired. The output of the voltage detection lines 60A, 60B and 60C of the battery module 20 at each stage can be taken out to the output connector 41 at the most upstream (uppermost) output direction.

  FIG. 6 is a perspective view of a state in which the battery modules are arranged and the assembled battery according to the first embodiment is assembled. As shown in the figure, by connecting an arbitrary number of battery modules 20 in series, an assembled battery 80 that can handle a desired current, voltage, and capacity is obtained. The assembled battery 80 of this embodiment includes a total of 12 battery modules 20. In the twelve battery modules 20, three battery module groups 20a stacked in the vertical direction in FIG. 3 are arranged in four rows in the horizontal direction. The positive and negative output terminals 21 and 22 of the battery module 20 are all provided on the same surface side (front surface side).

  The assembled battery 80 is an in-vehicle battery mounted on a vehicle such as an automobile or a train, and a plurality of battery modules 20 are stacked with a space therebetween. Although not shown, a plurality of battery modules 20 are housed in an assembled battery case, and an inlet duct for introducing cooling air and an outlet duct for extracting cooling air are connected to the assembled battery case. Has been.

  The battery module 20 is air-cooled, and the space between the battery modules 20 is used as a cooling air flow path through which cooling air for cooling each of the battery modules 20 flows. By cooling each battery module 20 by flowing cooling air, the battery temperature is lowered and the deterioration of characteristics such as charging efficiency is suppressed. The clearance between the battery modules 20 (such as the gap S1 in FIG. 3) is determined in consideration of a layout when mounted on a vehicle, dimensions necessary for functioning as a cooling air flow path, etc., but is about several mm. .

  The battery modules 20 arranged as the assembled battery 80 are connected at the shortest distance, that is, between the positive and negative terminals of adjacent modules, in order to reduce the electrical resistance at the time of connection. As shown in FIG. 6, the minus terminal of the module 20A and the plus terminal of the module 20B stacked thereon are connected by a bus bar 30A, and the minus terminal of the module 20B and the plus terminal of the module 20C laminated thereon are connected. The terminal is connected by the bus bar 30B, the minus terminal of the module 20C and the plus terminal of the module 20D located beside the module 20C are connected by the bus bar 30C, and the minus terminal of the module 20D and the plus terminal of the module 20E located beside it Are connected by the bus bar 30D, and the-terminal of the module 20E and the + terminal of the module 20F located on the side thereof are connected by the bus bar 30E.

  Further, the minus terminal of the module 20F and the plus terminal of the module 20G located below the module 20G are connected by the bus bar 30F, and the minus terminal of the module 20G and the plus terminal of the module 20H located beside it are connected by the bus bar 30G. The minus terminal of 20H and the plus terminal of the module 20I located beside it are connected by the bus bar 30H, and the minus terminal of the module 20I and the plus terminal of the module 20J stacked thereunder are connected by the bus bar 30I. The − terminal of 20J and the + terminal of the module 20K located beside it are connected by the bus bar 30J, and the − terminal of the module 20K and the + terminal of the module 20L located beside it are connected by the bus bar 30K.

  The positive terminal 21A of the module 20A is connected to a load (not shown) as a positive terminal of the assembled battery 80, and the negative terminal 22A of the module 20L is connected to the load as a negative terminal of the assembled battery 80. That is, all the modules 20A to 20L constituting the assembled battery 80 are electrically connected in series via the bus bars 30A to 30K. The + terminal 21A of the module 20A located electrically upstream and the-terminal 22A of the module 20L located downstream are the positive terminal and the negative terminal of the assembled battery 80. The modules 20 </ b> A and 20 </ b> L are modules arranged on the outermost side among the modules 20 </ b> A to 20 </ b> L constituting the assembled battery 80. Moreover, the positive electrode terminal and the negative electrode terminal of the assembled battery 80 are terminals 21A and 22A arranged on the outermost sides of the module 20A and the module 20L.

  Therefore, the positive electrode terminal and the negative electrode terminal of the assembled battery 80 are terminals located at both ends of the assembled battery 80 as shown in FIG. 6, and the separation distance between the positive electrode terminal and the negative electrode terminal where a high voltage appears is large. Thus, when the positive electrode terminal and the negative electrode terminal of the assembled battery 80 are provided at both ends of the assembled battery 80, the thick high-voltage cables connected to the positive electrode terminal and the negative electrode terminal are connected to the bus bars 30A to 30K and the input / output connector 40. If the distance between the positive electrode terminal and the negative electrode terminal of the assembled battery 80 is increased, it is advantageous in terms of insulation between the positive electrode terminal and the negative electrode terminal.

  As shown in FIGS. 3 and 6, each output connector 41 of the battery module 20 located at the most upstream (uppermost stage) in the output direction is connected to the output connector 41 from the voltage detection device (controller) 90 via the lead wire 71. A connector 70 is attached and electrically connected to the voltage detection lines 60A, 60B, and 60C. The detection of the voltage by the controller 90 is performed in order to manage charge / discharge, capacity, etc. of the battery module 20.

  According to the assembled battery of the first embodiment configured as described above, the output connector 41 of the battery module 20 is sequentially connected to the input connector 42 of the battery module 20 stacked on the upper part, and the output direction most upstream (uppermost stage) Since the voltage detection lines 60A, 60B and 60C can be electrically connected to the controller 90 simply by electrically connecting the output connector 41 of the battery module 20 located at the connector 90 of the controller 90, the battery module 20 Without interfering with the bus bars 30 </ b> A to 30 </ b> K that connect the electrode terminals, it is possible to realize an assembled battery that does not require securing of the wiring space of the voltage detection line or complicated wiring work.

[Second Embodiment]
FIG. 7 is a perspective view of a battery module that is a single unit when assembling the assembled battery of the second embodiment. FIG. 8 is a perspective view of the battery modules arranged in the left-right direction. In the following description, members having the same configurations as those in the first embodiment are described with the same reference numerals.

  As shown in FIGS. 7 and 8, in the second embodiment, the output connector 41 is provided on one side of the opposite left and right side surfaces of the battery module 20, and the battery module 20 adjacent to the other side is described above. An input connector 42 to which the output connector 41 can be connected is provided. In the present embodiment, for example, the output connector 41 positioned on the right side surface of the battery module 20 is formed by a male connector, and the input connector 42 positioned on the left side surface is formed by a female connector. Males and females may be reversed. That is, in the second embodiment, the output connector 41 and the input connector 42 are formed separately, and two pairs are provided in the front and rear in each battery module 20.

  When assembling the assembled battery 180 by arranging a plurality of battery modules 20, as shown in FIG. 8, the output connector 41 on the right side surface of the battery module 20 is arranged on the right side of the input connector 42 on the left side surface of the battery module 20. Can be sequentially connected to form a battery module group 20b arranged in the left-right direction. In the battery module group 20b, the projecting output connector 41 functions as a spacer between the battery modules 20 and 20 arranged side by side to form a gap S2. In FIG. 8, for convenience of illustration, a state where three rows are connected in the left-right direction is shown.

  FIG. 9 is a schematic diagram showing a pin arrangement in the connector. FIG. 10 is a schematic diagram showing a wiring path of the connector.

  The main bodies of the output connector 41 and the input connector 42 are made of, for example, plastic. As shown in FIG. 9, a plurality of connector pins 150 are provided in the left and right connectors 41 and 42, respectively. Similar to the first embodiment, one system is constituted by four-pin connector pins 50, and the number of connector pins 150 corresponds to the number of battery modules 20 arranged in the connector connection direction. That is, in this embodiment, since the battery modules 20 are connected in four rows in the left-right direction, a total of 16 connector pins 150 corresponding to the first row, the second row, the third row, and the fourth row are provided. It has been.

  In each battery module 20, the voltage detection line 160 connected to each battery electrode (cell) of the battery module 20 is connected to one connector pin 150 of the output connector 41, and the other connector of the output connector 41. A transmission line 161 is wired for each system from the connector pin 150 of the input connector 42 to the pin 150, which will be specifically described with reference to FIG. In FIG. 10, for convenience of explanation, the first connector pin of the output connector 41 and the input connector 42 is 150A, the second connector pin is 150B, the third connector pin is 150C, and the fourth connector pin. The connector pin is referred to as 150D.

  As shown in FIG. 10, in the battery module 20 in the fourth row, the voltage detection line 160A connected to each battery electrode (cell) is connected to the connector pin 150A of the first system of the output connector 41. A transmission line 161 </ b> A is wired from the first system connector pin 150 </ b> A of the input connector 42 to the second system connector pin 150 </ b> B of the output connector 41. Further, the third system connector pin 150C of the output connector 41 is wired with a transmission line 161B from the second system connector pin 150B of the input connector 42. A transmission line 161 </ b> C is wired from the third system connector pin 150 </ b> C of the input connector 42 to the fourth system connector pin 150 </ b> D of the output connector 41. In the present embodiment, in the battery modules 20 in the fourth row, the transmission lines 161A, 161B, and 161C are free wiring.

  In FIG. 10, the number of voltage detection lines 160 and transmission lines 161 corresponding to the number of connector pins of each system (four in this embodiment) is provided, as in the first embodiment.

  The output connector 41 on the right side surface of the battery modules 20 in the fourth row is connected to the input connector 42 on the left side surface of the battery modules 20 in the third row arranged on the right side thereof. In the battery module 20 in the third row, a voltage detection line 160B connected to each battery electrode (cell) is connected to the connector pin 150A of the first system of the output connector 41. Further, the transmission line 161D is wired from the first system connector pin 150A of the input connector 42 to the second system connector pin 150B of the output connector 41, and the voltage detection line 160A of the battery module 20 in the fourth row is connected. Conducted. Further, the third system connector pin 150C of the output connector 41 is wired with a transmission line 161E from the second system connector pin 150B of the input connector 42. A transmission line 161F is wired from the third system connector pin 150C of the input connector 42 to the fourth system connector pin 150D of the output connector 41. In the present embodiment, in the battery modules 20 in the third row, the transmission lines 161E and 161F are free wiring.

  Further, the output connector 41 on the right side surface of the battery modules 20 in the third row is connected to the input connector 42 on the left side surface of the battery modules 20 in the second row arranged on the right side thereof. In the battery module 20 in the second row, a voltage detection line 160C connected to each battery electrode (cell) is connected to the connector pin 150A of the first system of the output connector 41. Further, the transmission line 161G is wired from the first system connector pin 150A of the input connector 42 to the second system connector pin 150B of the output connector 41, and the voltage detection line 160B of the battery module 20 in the third row is connected. Conducted. Further, the third system connector pin 150C of the output connector 41 is wired with a transmission line 161H from the second system connector pin 150B of the input connector 42, and the battery module 20 in the fourth row via the transmission line 161D. The voltage detection line 160A is electrically connected. A transmission line 161 </ b> I is wired from a third system connector pin 150 </ b> C of the input connector 42 to the fourth system connector pin 150 </ b> D of the output connector 41. In the present embodiment, in the battery modules 20 in the second row, the transmission line 161I is a free wiring.

  The output connector 41 on the right side of the battery modules 20 in the second row is connected to the input connector 42 on the left side of the battery modules 20 in the first row arranged on the right side. In the battery module 20 in the first row, a voltage detection line 160D connected to each battery electrode (cell) is connected to the connector pin 150A of the first system of the output connector 41. Further, the transmission line 161J is wired from the first system connector pin 150A of the input connector 42 to the second system connector pin 150B of the output connector 41, and the voltage detection line 160C of the battery module 20 in the second row is connected. Conducted. Further, a transmission line 161K is wired from the second system connector pin 150B of the input connector 42 to the third system connector pin 150C of the output connector 41, and the battery modules 20 in the third row are connected via the transmission line 161G. The voltage detection line 160B is electrically connected. A transmission line 161L is wired from the third system connector pin 150C of the input connector 42 to the fourth system connector pin 150D of the output connector 41. The batteries in the fourth row are connected via the transmission lines 161H and 161D. The module 20 is electrically connected to the voltage detection line 160A.

  That is, in each battery module 20, the connector pin 150D of the fourth system of the input connector 42 is a free pin, and the transmission line connection between the output connector 41 and the input connector 42 is shifted laterally one by one and wired. The outputs of the voltage detection lines 160A, 160B, 160C and 160D of the battery modules 20 at each stage can be taken out to the output connector 41 at the most upstream (rightmost) output direction.

  FIG. 11 is a perspective view of a state in which the battery modules are arranged and the assembled battery according to the second embodiment is assembled. As shown in the figure, by connecting an arbitrary number of battery modules 20 in series, an assembled battery 180 that can handle a desired current, voltage, and capacity is obtained. The assembled battery 180 of this embodiment includes a total of twelve battery modules 20 as in the first embodiment. The twelve battery modules 20 are formed by stacking three battery module groups 20b connected in four rows in the left-right direction in the vertical direction. The positive and negative output terminals 21 and 22 of the battery module 20 are all provided on the same surface side (front surface side).

  As shown in FIGS. 10 and 11, each output connector 41 of the battery module 20 located on the most upstream side (rightmost side) in the output direction has a connection connector protruding from the left side surface of the voltage detection device (controller) 190. 170 is attached and is electrically connected to the voltage detection lines 160A, 160B, 160C and 160D.

  According to the assembled battery of the second embodiment configured as described above, basically the same operational effects as the assembled battery of the first embodiment are obtained, but in particular, in the second embodiment, the voltage detection device. Since the connection connector 170 protrudes from the left side surface of 190, the assembled battery 180 is simply attached to each output connector 41 of the battery module 20 positioned at the most upstream (rightmost) output direction. The controller 190 can be disposed on the side surface of the first and second embodiments, and the troublesome handling of the lead wire 71 can be avoided as in the first embodiment.

  In the above embodiment, the assembled battery in which the battery modules are arranged in 3 rows and 4 columns is exemplified. However, the present invention is not limited to this, and the present invention can be applied even to an assembled battery in which the battery modules are arranged in arbitrary rows and columns. Is possible.

  In the above embodiment, all battery modules are connected in series to form an assembled battery. For example, a plurality of battery modules are connected in parallel and connected in series. It goes without saying that the connection form can be changed as appropriate.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a power assembled battery mounted on a vehicle such as a power source for driving a motor for driving a vehicle in an electric vehicle or a hybrid vehicle, or an auxiliary power source for a fuel cell vehicle.

It is a perspective view of the battery module which is a single unit at the time of assembling the assembled battery of 1st Embodiment. It is a perspective view of an example of a flat type battery. It is a perspective view of the state where the battery module was stacked up and down. It is the schematic which shows the pin arrangement in a connector. It is the schematic which shows the wiring path | route of a connector. It is a perspective view of the state which arranged the battery module and assembled the assembled battery of 1st Embodiment. It is a perspective view of the battery module which is a single unit at the time of assembling the assembled battery of 2nd Embodiment. It is a perspective view of the state which arranged the battery module in the horizontal direction. It is the schematic which shows the pin arrangement in a connector. It is the schematic which shows the wiring path | route of a connector. It is a perspective view of the state which arranged the battery module and assembled the assembled battery of 2nd Embodiment.

Explanation of symbols

10 flat battery,
20 battery module,
20a battery module group,
21 and 22 output terminals,
23 housing (module case),
30A-30K bus bar 40 I / O connector,
41 output connector,
42 input connector,
50 connector pins,
60A-60C voltage detection line,
61A-61F transmission line,
70 connector,
80 battery packs,
90 voltage detector (controller),
160A-160D voltage detection line,
161A to 161K transmission line,
170 connector,
180 battery packs,
190 Voltage detector (controller).

Claims (4)

A battery module in which a plurality of batteries are housed in a housing to form a battery module, and a plurality of the battery modules are arranged and electrically connected,
Provide an output connector on one surface side of each battery module facing the other battery module, and provide an input connector that can connect the output connector of the battery module adjacent to the other surface side,
Each connector has multiple connector pins.
A voltage detection line connected to each battery electrode of the battery module is connected to one connector pin of the output connector, and transmitted from the connector pin of the input connector to each connector pin of the other system of the output connector. Wire the wire,
When arranging a plurality of battery modules, the output connector of the battery module is sequentially connected to the input connector of the adjacent battery module, and the output connector of the battery module located at the most upstream in the output direction is electrically connected to the voltage detection device. A battery pack characterized by.   The assembled battery according to claim 1, wherein a battery module is formed by stacking and storing a plurality of flat batteries in the housing.   3. The assembled battery according to claim 1, wherein the number of systems of connector pins of the output connector and the input connector corresponds to the number of battery modules arranged in the connector connection direction.   4. The assembled battery according to claim 3, wherein in each battery module, the transmission line connection between the output connector and the input connector is laterally shifted one by one.

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