JP7109256B2 - battery module - Google Patents

Description

The present invention relates to a battery module comprising a plurality of battery cells arranged in a stack.

For example, as a battery device for driving an electric motor of a hybrid vehicle, an electric vehicle, etc., a battery module is used in which a plurality of battery cells made up of various types of secondary batteries such as lithium ion secondary batteries are connected in series. It is In particular, electric vehicles are required to have a large capacity battery module and an increased number of mounted battery modules due to the need to extend the cruising distance, and thus a plurality of battery modules are used in combination.

As the battery module described above, a plurality of battery cells each having a battery cell main body, a positive electrode terminal made of a conductive foil, and a negative electrode terminal made of a conductive foil are arranged in a stack to form a battery cell stack. In one battery cell, one terminal pair is configured by the positive terminal of one battery cell and the negative terminal connected to the positive terminal of the other battery cell, and both terminals of the terminal pair are connected to the battery cell body. A gap having a constant width in the stacking direction of the battery cells is formed in the entire space between both terminals of the terminal pair, and a conductor connection is formed between both terminals of the terminal pair. A battery module is known in which members are arranged and both terminals are electrically connected via a connection member (see Patent Document 1). Although not specified in Patent Document 1, the terminal and the connecting member are metallically joined by a laser welding method or an ultrasonic joining method.

Further, as the battery module described above, a plurality of battery cells each having a battery cell main body, a positive electrode terminal made of a conductive foil, and a negative electrode terminal made of a conductive foil are arranged in a stack to form a battery cell stack. In two battery cells that are aligned, one terminal pair is configured by the positive terminal of one battery cell and the negative terminal connected to the positive terminal of the other battery cell, and both terminals of the terminal pair are connected to the battery. A battery module is known which protrudes in the same direction from a cell body and is bent so that both terminals are in contact with each other (see Patent Document 2). Although not specified in Patent Document 2, the terminal and the connecting member are metallically joined by a laser welding method or an ultrasonic joining method.

Japanese Patent No. 6058034 Japanese Patent No. 5883944

However, in the case of the battery module described in Patent Document 1, the positive terminal and the negative terminal of the terminal pair are electrically connected via a connecting member that is a separate component, so the positive terminal and the negative terminal are directly electrically connected. The electrical resistance increases compared to the case where the battery module is connected to the battery module, and the performance as a battery module deteriorates.

Moreover, in the case of the battery module described in Patent Document 2, it is necessary to bend the positive electrode terminal and the negative electrode terminal, which increases the number of manufacturing steps.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a battery module having improved performance and capable of preventing an increase in the number of manufacturing processes.

The present invention consists of the following aspects in order to achieve the above object.

1) A battery cell laminate is formed by arranging a plurality of battery cells having positive terminals and negative terminals protruding from the battery cell main body in a stacked manner, and all the battery cells in the battery cell laminate have positive terminals and negative terminals. A battery module connected in series using
In two adjacent battery cells, the positive terminal of one battery cell and the negative terminal of the other battery cell protrude in the same direction to form a terminal pair, and the positive terminal and the negative terminal of the terminal pair are electrically insulated. battery modules that are directly joined in a state of being in contact or brought close to each other by a guide member provided with the battery module;

2) The guide member has a guide portion that brings the terminals of the terminal pair into contact or close to each other, and the guide portion is provided with a window portion that exposes a part of the terminal pair to the outside. The battery module according to 1) above, which is joined.

3) a groove portion in which the guide portion opens toward the battery cell, and the width of the opening in the stacking direction of the battery cell is larger than the gap between both terminals of the terminal pair at the end portion on the battery cell side and becomes smaller toward the bottom; , and a slit-shaped accommodation portion communicating with the bottom of the groove,
The battery module according to 2) above, wherein both terminals of the terminal pair inserted through the groove portion of the guide portion are in contact or close to each other in the accommodating portion, and are joined in a window portion provided in the accommodating portion.

4) The guide portion is formed by a pair of guide portion forming members spaced apart, and each guide portion forming member includes a first wall portion forming a groove portion of the guide portion and a second wall portion forming a housing portion. The battery module according to 3) above, comprising a wall portion.

5) A positive electrode terminal is provided on one side of two opposing sides of a battery cell main body of a rectangular shape, and a negative electrode terminal is provided on the other side, and a plurality of the battery cells are formed. A plurality of terminal pairs are formed on both sides of the battery cell stack by arranging the positive terminals and the negative terminals alternately,
All the terminal pairs on one side of the battery cell stack are brought into contact with or brought close to each other by one guide member having a guide portion for the number of terminal pairs, and all the terminal pairs on the other side are a guide for the number of terminal pairs. The battery module according to any one of the above 1) to 4), which is in contact with or brought close to by one guide member having a portion.
6) A battery cell in which a positive electrode terminal and a negative electrode terminal are provided on one side of a rectangular battery cell main body at intervals in the longitudinal direction of the side, and a plurality of the battery cells are adjacent to each other. A plurality of terminal pairs are formed in two rows on one side of the battery cell stack by arranging the positive electrode terminals and negative electrode terminals of the
The battery module according to any one of the above 1) to 4), wherein all the terminal pairs are brought into contact with or brought close to each other by one guide member having a guide portion for the number of terminal pairs.

According to the battery modules 1) to 6) above, in the two battery cells adjacent to each other in the battery cell stack, the positive terminal of one battery cell and the negative terminal connected to the positive terminal of the other battery cell are provided. constitutes one terminal pair, both terminals of the terminal pair protrude in the same direction from the battery cell main body, and the positive terminal and the negative terminal of the terminal pair are in contact with each other by an electrically insulating guide member. Alternatively, the positive terminal and the negative terminal of the terminal pair are directly connected electrically because they are directly joined while being brought close to each other. Therefore, an increase in resistance is suppressed compared to the battery module described in Patent Document 1, and the performance of the battery module is improved.

In addition, since the positive terminal and the negative terminal of the terminal pair are connected while being in contact with or brought close to each other by the guide member, it is necessary to bend the positive terminal and the negative terminal as in the battery module described in Patent Document 2. and can prevent an increase in the number of manufacturing processes.

According to the battery module of 2) above, the positive electrode terminal and the negative electrode terminal, which are in contact with each other or brought close to each other by the guide portion of the guide member, are exposed in the window portion. can be done.

According to the battery module of 3) above, the positive electrode terminal and the negative electrode terminal are bent so as to approach each other by the groove portion of the guide portion, and the two terminals are held in contact or close proximity in the accommodating portion. Therefore, the positive terminal and the negative terminal of the terminal pair can be easily and reliably brought into contact or close to each other. Further, since the housing portion is provided with a window portion, the positive electrode terminal and the negative electrode terminal which are brought into contact with each other or brought close to each other are joined at the window portion.

According to the battery module of 4) above, the guide member having the groove and the accommodating portion can be formed by the guide portion forming member having the inclined wall and the vertical wall.

According to the battery modules 5) and 6) above, the number of guide members used can be significantly reduced compared to the number of connection members described in Patent Document 1, and the number of parts can be reduced.

1 is a perspective view showing the overall configuration of a battery module according to the invention; FIG. FIG. 2 is an exploded perspective view of the battery module of FIG. 1; FIG. 2 is a partially omitted front view showing the battery module of FIG. 1 ; FIG. 2 is a perspective view of a battery cell stack used in the battery module of FIG. 1; 4 is a perspective view of a battery cell held by a holding frame; FIG. FIG. 3 is a cross-sectional view of a portion of FIG. 2 taken along line VI-VI. It is a principal part front view which shows the attachment method of an upper guide member. 5 is a perspective view showing a modified example of the battery cell stack of FIG. 4 and an upper guide member used for connecting the battery cells. FIG. FIG. 9 is an exploded perspective view of FIG. 8; FIG. 5 is an exploded perspective view showing a modified example of battery cells and a guide member used for connecting these battery cells. FIG. 11 is a front view of a main part of FIG. 10;

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

In the following description, up and down and left and right in FIG. 3 are referred to as up and down and left and right, and the front side of the paper surface of FIG. 3 is referred to as front and the opposite side as rear. In addition, the same symbols are attached to the same items and the same parts throughout the drawings.

1 and 2 show the overall construction of a battery module according to the present invention, and FIGS. 3 to 7 show the construction of essential parts.

As shown in FIGS. 1 to 5, the battery module (1) includes a plurality of flat prismatic battery cells (2), for example, a plurality of flat prismatic lithium ion secondary battery cells arranged in a stack. A body (6) is constructed, and all the battery cells (2) of the battery cell stack (6) are connected in series. The battery stack (6) in the illustrated example has 12 battery cells (2) stacked.
(Battery cell laminate)
The battery cell (2) is a laminate type battery cell, and although not shown, a sheet-like positive electrode, a sheet-like negative electrode, and a sheet-like separator for partitioning the positive electrode and the negative electrode are alternately arranged in the battery cell main body (3). It has a laminated electrode group, and the electrode group is sealed between two laminate films whose peripheries are welded. The positive electrode terminal (4) is electrically connected to all the positive electrodes of the electrode group, is pulled out from one side portion of the battery cell main body (3), and protrudes from the battery cell main body (3). The negative terminal (5) is electrically connected to all the negative electrodes of the electrode group, and is pulled out from the side of the battery cell main body (3) opposite to the side from which the positive terminal (4) is pulled out to connect the battery cell main body. It protrudes from part (3). That is, the positive terminal (4) and the negative terminal (5) protrude from opposite sides of the battery cell body (3). For example, aluminum foil (including aluminum alloy foil) is used for the positive electrode terminal (4), and copper foil (including copper alloy foil) is used for the negative electrode terminal (5). Each battery cell (2) is held by a holding frame (8) as shown in FIG.

The battery cell stack (6), as shown in FIGS. 1 and 2, is composed of battery cells (2) held by a holding frame (8). 3, 4 and 7 omit illustration of the holding frame (8) and show only the battery cell (2).

In the battery cell stack (6), the positive terminal (4) and the negative terminal (5) of the battery cell (2) protrude vertically and are arranged and stacked in the horizontal direction so that the top and bottom are alternately reversed. Furthermore, it is sandwiched by sandwiching frames (9) from both sides in the stacking direction, and is fixed by fasteners (11) such as bolts and nuts that pass through both sandwiching frames (9) and all holding frames (8). . With this arrangement, the positive terminal (4), the negative terminal (5), and the positive terminal (4) are alternately arranged from left to right on the upper surface of the battery cell stack (6), and on the lower surface, from left to right. The negative terminal (5), the positive terminal (4), the negative terminal (5), and so on are arranged alternately in that order. On the upper surface, the positive terminal (4) of the leftmost battery cell (2) and the negative terminal (5) of the second battery cell (2) from the left (hereafter referred to as "battery cell (2)") are connected. A terminal pair (7) is formed, and 6 pairs of terminal pairs (7) are sequentially formed up to the rightmost negative terminal (5). On the other hand, on the lower surface, the second positive terminal (4) from the left and the third negative terminal (5) from the left form a terminal pair (7), followed by the eleventh from the left (second from the right). Five pairs of terminal pairs (7) are formed up to the negative terminal (5). Therefore, the terminal pair (7) on the upper surface and the terminal pair (7) on the lower surface are shifted by half a pitch in the horizontal direction. The leftmost negative terminal (5) and the rightmost positive terminal (4) on the lower surface are used as the positive terminal and the negative terminal of the battery module (1) without forming a terminal pair.
(Battery cell connection)
As shown in FIG. 3, six pairs of terminal pairs (7) on the upper surface of the battery cell stack (6) are connected or connected to the positive terminal (4) and the negative terminal (5) using an upper guide member (12). The five pairs of terminals (7) on the lower surface are in contact with or brought close to the positive terminal (4) and the negative terminal (5) using the lower guide member (40). , and 12 battery cells (2) are connected in series. The upper guide member (12) and the lower guide member (40) are made of an electrically insulating material, and synthetic resin guide members are preferably used. In addition, the terminal pair (7) directly connects the positive terminal (4) and the negative terminal (5) without using a connecting member such as a bus bar.

As shown in FIGS. 2 and 6, the upper guide member (12) is composed of a square frame (13) made up of four strip-shaped frame members (13a) whose width direction is oriented vertically, and the frame ( 13) two kinds of plural guide part forming members (15d) and (15e) fixed in the inner part of the terminal pair (15d) and (15e) corresponding to the number of terminal pairs (7) on the upper surface Six guide portions (14) are formed.

One guide portion forming member 15d has an inclined wall (15a) (first wall portion) inclined so that the right side is high and the left side is low, and the upper end of the inclined wall (15a) extends straight upward. It consists of vertical walls (15b) (second walls) parallel to both sides of the battery cell main body (3). The other guide portion forming member 15e includes an inclined wall (15c) (first wall portion) inclined so that the left side is higher and the right side is lower, and the upper end of the inclined wall (15c) extends straight upward. It consists of vertical walls (15b) (second walls) parallel to both sides of the battery cell main body (3). The two types of guide portion forming members (15d) and (15e) are alternately arranged side by side so that the inclined walls (15a) and (15c) with different inclination directions approach each other upward. It is fixed to the front and rear frame members (13a). In addition, the inclined wall (15a) of the guide portion forming member (15d) and the inclined wall (15c) of the guide portion forming member (15e) adjacent to each other except for the guide portion forming members (15d) and (15e) at the left and right ends are at the lower ends. They are joined together to form a single unit and present a U-shaped cross section.

By arranging the two types of guide portion forming members (15d) and (15e) in the manner described above, the six guide portions (14) are arranged side by side in the horizontal direction at the same pitch as the six pairs of terminal pairs (7). It is The guide portion (14) has a groove portion (16) and a housing portion (17). That is, the slanted walls 15a and 15c with different slanting directions face each other to form an opening toward the battery cell 2 (lower side in the drawing), and the width of the opening in the stacking direction (horizontal direction) of the battery cell 2 is increased. A groove portion (16) is formed, which becomes smaller toward the bottom, in other words, becomes smaller as the distance from the battery cell 2 increases. A slit-shaped housing portion (17) is formed in communication with the bottom portion of 16). A window portion (19) opened in the left-right direction is formed in the housing portion (17) by cutting out rectangular central portions of the opposing vertical walls (15b) in the longitudinal direction (front-to-rear direction). In addition, the opening width W1 at the end of the guide groove (16) on the battery cell (2) side is larger than the gap W2 between the positive terminal (4) and the negative terminal (5) of the terminal pair (7). set to be large. The interval W2 is the interval before the positive terminal (4) and the negative terminal (5) shown in FIG. 7 are brought close to each other.

The upper guide member (12) of the illustrated example has six guide portions (14) corresponding to the number of terminal pairs (7). An arbitrary number of guide portions (14) can be formed by increasing or decreasing the number.

Attachment of the upper guide member (12) to the battery cell stack (6) and joining of the terminal pair (7) are performed as follows.

As shown in FIG. 7, the upper guide member (12) is positioned so that the positive terminal (4) and the negative terminal (5) of each terminal pair (7) of the battery cell stack (6) are connected to the groove (14) of the guide section (14). Place it so that it is positioned within the opening range of 16).

Next, the upper guide member (12) and the battery cell stack (6) are brought relatively close to each other so that the frame (13) straddles all the holding frames (8) of the battery cell stack (6). Then, the positive terminal (4) and the negative terminal (5) of each terminal pair (7) enter the groove (16) of the guide (14) and are guided by the inclined walls (15a) (15c) of the groove (16). Both terminals (4) and (5) are bent toward each other, and the tip portions of the positive electrode terminal (4) and the negative electrode terminal (5) are inserted into the receiving portion (17) to connect the terminals (4) and (5). are held in contact or in close proximity (FIG. 3). The positive terminal (4) and the negative terminal (5) of the terminal pair (7) inserted into the accommodation portion (17) are exposed through the window portion (19) (Fig. 1). Since the opening width W1 of the groove 16 is larger than the interval W2 between the positive terminal 4 and the negative terminal 5, the positive terminal 4 and the negative terminal 5 easily enter the groove 16. Also, since the positive terminal (4) and the negative terminal (5) are smoothly bent by the inclined walls (15a) and (15c), no bending work is required to bring them into contact or close to each other. In addition, since the terminal portion (7) is reinforced by being inserted into the accommodating portion (17), and the distance between the adjacent terminal pair (7) is maintained, unwanted deformation of the terminal pair (7) is avoided. can be prevented. In addition, since each terminal pair (7) is covered with the electrically insulating upper guide member (12) up to the vicinity of the battery cell body (3), a short circuit is prevented.

The positive terminal (4) and the negative terminal (5) exposed at the window (19) are directly joined. The bonding method is a laser welding method, an ultrasonic bonding method, or the like. The positive terminal (4) and the negative terminal (5) in the housing portion (17) are in contact or close to each other, so they can be easily joined, and since no connection member is used, an increase in resistance can be suppressed.

The lower guide member (40) is upside down from the upper guide member (12). ing. The number of guide portions 14 is five corresponding to the number of terminal pairs 7, and the number of guide portion forming members 15d and 15e is smaller than that of the upper guide member 12. Therefore, in the guide portion (14), the groove portion (16) opens toward the battery cell (2) on the upper side of the drawing, and the housing portion (17) extends downward while communicating with the bottom portion of the groove portion (16). A window portion (19) is formed in the accommodation portion (17) by cutting out the vertical wall (15b), like the upper guide member (12). However, since the terminal pair (7) on the upper surface and the terminal pair (7) on the lower surface are shifted in the horizontal direction by half a pitch, the positions of the guide portions (14) of the upper and lower guide members (12) and (40) are shifted by half a pitch. ing.

The mounting method of the lower guide member (40) and the joining of the positive terminal (4) and the negative terminal (5) of the terminal pair (7) conform to those of the upper guide member (12).

As described above, all the battery cells (2) of the battery cell stack (6) are connected in series.

The upper guide member (12) and the lower guide member (40) are provided with a required number of guide portions (14) by fixing a plurality of guide portion forming members (15d) and (15e) within the frame (13). It is formed at a position corresponding to pair (7). By using such guide members (12) and (40), a plurality of terminal pairs (7) can be brought into contact or close to each other collectively, so that the number of parts and connection work can be greatly reduced. The present invention does not exclude the use of separate guide members for each terminal pair.
(Modified example of guide member)
8 and 9 show modifications of the upper guide member used in the battery cell stack (6).

The upper guide member (20) has two windows (19) formed in one housing portion (17), and has the same structure as the upper guide member (12) in FIG. 6 etc. except for the number of windows (19). is. The positive terminal (4) and the negative terminal (5) of each terminal pair (7) are joined at two points by the upper guide member (20).

8 and 9 show only the upper guide member 20, the same type of guide member can be applied to the lower terminal pair 7 as well.
(Modified example of battery cell and guide member)
10 and 11 show a battery cell (30) of another shape and a guide member (50) used for a battery cell stack (8) in which 12 battery cells (30) are stacked.

The battery cell (30) is provided with a positive terminal (4) and a negative terminal (5) on one side of a rectangular battery cell body (3). In the illustrated example, a positive terminal (4) and a negative terminal (5) are provided on the upper side of the battery cell (30) with a space therebetween in the front-rear direction.

In the battery cell stack (8), the positive terminals (4) and negative terminals (5) of the battery cells (30) are arranged and stacked in the left-right direction so that the front and rear terminals are alternately reversed. With this arrangement, the terminals are arranged in front and rear two rows on the upper surface of the battery cell stack (8), and in the front row, the negative terminal (5), the positive terminal (4), the negative terminal (5), and so on are alternately arranged from left to right. , and in the back row, the positive terminal (4), the negative terminal (5), the positive terminal (4), . . . are alternately arranged from left to right. In the front row, the terminals are connected by the negative terminal (5) of the leftmost battery cell (30) and the positive terminal (4) of the second battery cell (30 (hereinafter referred to as "battery cell (30)") from the left). A pair (7) is formed, and six pairs of terminal pairs (7) are sequentially formed from the left to the 12th (rightmost) positive electrode terminal (4).On the other hand, in the rear row, the second negative electrode from the left is formed. A terminal pair (7) is formed by the terminal (5) and the third positive terminal (4) from the left, and then five pairs of terminal pairs (7) are formed sequentially from the left to the eleventh positive terminal (4). The leftmost positive electrode terminal (4) and the rightmost negative electrode terminal (5) in the back row are used as electrode terminals of the battery cell stack (8) without forming a terminal pair (7). On the upper surface of the laminate (8), the odd-numbered terminal pairs (7) from the left are formed in the front row, and the even-numbered terminal pairs (7) are formed in the back row, for a total of 11 pairs of terminal pairs (7) in the front row. 11, for convenience of explanation, the positive terminals 4 and negative terminals 5 in the front and rear rows are shown with a slight left-right shift, In addition, the positive terminal (4) and the negative terminal (5) in the back row are displayed lower than the positive terminal (4) and the negative terminal (5) in the front row.

The guide member 50 has a rectangular frame (not shown) in which a group of guide portion forming members 51 for the front row terminal pairs and a group of guide portion forming members 52 for the rear row terminal pairs are arranged in two rows in the front-rear direction. Fixed. These guide portion forming member groups (51) and (52) are composed of a plurality of guide portion forming members (53) and (54) of two types with different inclination directions of the inclined walls (55a) and (55c). The positions of the guide portion forming members (53) and (54) of the guide portion forming member group (51) and the rear guide portion forming member group (52) are shifted by half a pitch in the horizontal direction. The length of the guide portion forming members (53) and (54) in the front-rear direction is half that of the guide portion forming members (55d) and (55e) shown in FIGS. 53) (54) are arranged alternately to form grooves (56) which open toward the battery cell (30) side and whose opening width decreases toward the bottom, and vertical walls (55b) communicate with the bottom of the grooves (56). The structure for forming the guide portion (58) having the slit-shaped accommodation portion (57) is common to that of the upper guide member (12) shown in FIG. 6 and the like. In the two rows of guide part forming member groups (51) and (52), since the positions of the guide part forming members (53) and (54) in the front row and the rear row are shifted by half a pitch, the guide parts (58) in the front row and the rear row The odd-numbered guides 58 from the left are formed in the front row, and the even-numbered guides 58 are formed in the rear row, for a total of 11 guides 58. The front and back rows are arranged in a zigzag pattern with a half-pitch difference. Then, as shown in FIG. 11, the centers of all the terminal pairs (7) in the front and rear rows are aligned with the centers of the guide portions (58) in the front or rear rows. In addition, the accommodation portion 57 of each guide portion 58 is provided with a window portion 19 formed by cutting the vertical wall 55b, and the opening width W1 of the groove portion 56 is It is also common to the guide portion (14) shown in FIGS.

The mounting method of the guide member (50) and the joining of the positive terminal (4) and the negative terminal (5) of the terminal pair (7) conform to the upper guide member (12) described above. Twelve battery cells (30) are connected in series by connecting eleven pairs of terminal pairs (7).

INDUSTRIAL APPLICABILITY The battery module according to the present invention is suitable for use in battery devices for driving electric motors such as hybrid vehicles and electric vehicles.

(1): Battery module
(2) (30): battery cell
(3): Battery cell body
(4): positive terminal
(5): Negative terminal
(6)(8): Battery cell stack
(7): Terminal pair
(12)(20): Upper guide member (guide member)
(40): Lower guide member (guide member)
(14)(58): Guide part
(15d) (15e) (53) (54): Guide part forming member
(15a)(15c)(55a)(55c): Inclined wall (first wall)
(15b) (55b): vertical wall (second wall)
(16) (56): groove
(17) (57): Containment part
(19): Window
(50): Guide member W1: Groove opening width W2: Distance between positive terminal and negative terminal of terminal pair

Claims (5)

A plurality of battery cells each having a positive terminal and a negative terminal protruding from a battery cell main body are arranged in a stack to form a battery cell stack, and all the battery cells of the battery cell stack use a positive electrode terminal and a negative electrode terminal. a battery module connected in series with
In two adjacent battery cells, the positive terminal of one battery cell and the negative terminal of the other battery cell protrude in the same direction to form a terminal pair, and the positive terminal and the negative terminal of the terminal pair are electrically insulated. Directly joined in a state of contact or proximity by a guide member having
The guide member has a guide portion that brings the two terminals of the terminal pair into contact or close to each other, the guide portion is provided with a window that exposes a part of the terminal pair to the outside, and the two terminals are joined in the window. battery module. a groove portion in which the guide portion opens toward the battery cell, and the width of the opening in the stacking direction of the battery cell is larger than the gap between both terminals of the terminal pair at the end portion on the battery cell side and becomes smaller toward the bottom portion; and a slit-shaped accommodation portion communicating with the bottom of the groove,
2. The battery module according to claim 1 , wherein both terminals of the terminal pair inserted through the groove portion of the guide portion are in contact with each other or close to each other in the accommodating portion, and joined in a window portion provided in the accommodating portion. The guide portion is formed by a pair of guide portion forming members spaced apart, and each guide portion forming member includes a first wall portion forming a groove portion of the guide portion and a second wall portion forming a housing portion. The battery module according to claim 2 , comprising: A positive electrode terminal is provided on one side of two opposing sides of a battery cell main body portion, and a negative electrode terminal is provided on the other side of the battery cell body, and a plurality of the battery cells are provided with positive terminals. A plurality of terminal pairs are formed on both sides of the battery cell stack by arranging the and negative terminals alternately,
All the terminal pairs on one side of the battery cell stack are brought into contact with or brought close to each other by one guide member having a guide portion for the number of terminal pairs, and all the terminal pairs on the other side are a guide for the number of terminal pairs. The battery module according to any one of claims 1 to 3 , wherein the battery module is brought into contact with or brought into close proximity by one guide member having a portion. A positive electrode terminal and a negative electrode terminal are provided on one side of a battery cell main body in which the battery cells are square, and a plurality of the battery cells are adjacent to each other. By arranging the terminals and the negative terminals alternately, a plurality of terminal pairs are formed in two rows on one side of the battery cell stack,
4. The battery module according to any one of claims 1 to 3 , wherein all the terminal pairs are brought into contact with or brought close to each other by one guide member having guide portions corresponding in number to the terminal pairs.

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