Busbar module case and busbar module

Abstract

The objective is to provide a busbar module case and a busbar module that can ensure proper assembly of the cover to the case. [Solution] The busbar module case 10 of the busbar module 1 comprises a case 100 having a plurality of busbar cavities 111 each housing a plurality of busbars 20 connected to the electrodes of a plurality of battery cells BC, and a cover 200 assembled to the case 100, wherein the case 100 has a wall portion 112 provided along the arrangement direction of the plurality of busbars 20, and the cover 200 has an outer wall portion 215 provided outside the wall portion 112 and an inner wall portion 216 provided inside the wall portion 112, wherein the height direction length H1 of the inner wall portion 216 is longer than the length H2 of the outer wall portion 215.

Description

Technical Field

[0001] The present invention relates to a bus bar module case and a bus bar module.

Background Art

[0002] As a technology related to a conventional bus bar module case and a bus bar module, for example, Patent Document 1 discloses a case that houses a bus bar electrically connected to electrode terminals of a plurality of battery cells, a cover assembled to the case, and a temporary holding structure provided at an end of a detection line with respect to the cover and capable of temporarily holding a connector.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, such a bus bar module case and a bus bar module may be tampered with by inserting a wire or the like between the cover and the case to pry open the cover. In this regard, there is room for further improvement in the configurations of the case and the cover of the bus bar module case.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a bus bar module case and a bus bar module capable of ensuring an appropriate assembled state of the cover with respect to the case.

Means for Solving the Problems

[0006] To achieve the above objective, the busbar module case of the present invention comprises a case having a plurality of busbar cavities that each house a plurality of busbars connected to the electrodes of a plurality of battery cells arranged in a row, and a cover assembled to the case and covering the plurality of busbars, wherein the case has a wall portion provided along the arrangement direction of the plurality of busbars, and the cover has an outer wall portion provided on the outside of the wall portion along the arrangement direction, and an inner wall portion provided on the inside of the wall portion along the arrangement direction, wherein the length of the inner wall portion in the height direction perpendicular to the arrangement direction is longer than the length of the outer wall portion in the height direction.

[0007] To achieve the above objective, the busbar module of the present invention comprises a plurality of busbars connected to the electrodes of a plurality of battery cells arranged in a row, a case having a plurality of busbar cavities housing the plurality of busbars, and a cover assembled to the case and covering the plurality of busbars, wherein the case has wall portions provided along the arrangement direction of the plurality of busbars, and the cover has an outer wall portion provided outside the wall portion along the arrangement direction, and an inner wall portion provided inside the wall portion along the arrangement direction, wherein the length of the inner wall portion in the height direction perpendicular to the arrangement direction is longer than the length of the outer wall portion in the height direction. [Effects of the Invention]

[0008] The busbar module case and busbar module according to the present invention have the effect of ensuring that the cover is properly assembled to the case. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a perspective view showing a busbar module according to an embodiment. [Figure 2] Figure 2 is an exploded perspective view showing a busbar module according to this embodiment. [Figure 3] Figure 3 is a perspective view showing a case according to the embodiment. [Figure 4]Figure 4 is a partially enlarged plan view showing the bus cavity of the case according to the embodiment. [Figure 5] Figure 5 is a perspective view showing the cover according to this embodiment. [Figure 6] Figure 6 is a cross-sectional view taken along the line VI-VI in Figure 1. [Figure 7] Figure 7 is a partially enlarged perspective view showing the locking portion of the cover and the locking portion of the case according to the embodiment. [Figure 8] Figure 8 is a cross-sectional view taken along line VIII-VIII in Figure 7. [Figure 9] Figure 9 is a cross-sectional view taken along line IX-IX in Figure 1. [Figure 10] Figure 10 is a perspective view showing a wire being inserted into and pried open in a busbar module according to the embodiment. [Figure 11] Figure 11 is a cross-sectional view taken along line XI-XI in Figure 10. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited by these embodiments. Furthermore, some of the components in the following embodiments are substituted or substantially identical to those easily substituted by those skilled in the art.

[0011] [Embodiment] As shown in Figure 1, the busbar module 1 of this embodiment is assembled to the battery module BM. Here, the battery module BM of this embodiment includes a plurality of battery cells BC and the busbar module 1. The battery module BM of this embodiment is a component of the battery pack BP. The battery pack BP may have a plurality of battery modules BM. The battery pack BP is installed as a power source in a vehicle such as an electric vehicle or a hybrid electric vehicle.

[0012] Each battery cell BC has a pair of electrodes (not shown) consisting of a positive electrode and a negative electrode arranged on its electrode arrangement surface BC1. The busbar module 1 is provided across the electrode arrangement surfaces BC1 of multiple battery cells BC. The busbar module 1 includes a busbar module case 10, multiple busbars 20, a cable guide 30, and a voltage detection terminal 40 (see Figure 2). The multiple busbars 20 are housed in multiple busbar cavities 111 (see Figure 3) provided in the case 100 of the busbar module case 10 and are connected to the electrodes of each battery cell BC.

[0013] In the following explanation, the direction in which multiple busbars 20 are arranged and multiple battery cells BC are arranged side by side will be referred to as the first direction X (arrangement direction), the direction perpendicular to the first direction X and facing the wall surfaces 112a, 112b (see Figure 3) of the wall portion 112 formed on the outer edge of the case 100 will be referred to as the second direction Y (wall surface direction), and the direction perpendicular to the first direction X and the second direction Y will be referred to as the third direction Z (height direction). Furthermore, in the following explanation, one side of the first direction X will be referred to as side X1 and the other side as side X2. Similarly, the second direction Y will be referred to as side Y1 and side Y2, and the third direction Z will be referred to as side Z1 and side Z2.

[0014] A battery cell BC constitutes a so-called single cell, and multiple cells arranged along a first direction X form a battery pack. The electrode arrangement surface BC1 of each battery cell BC is the surface Z1 on one side in the third direction Z of the multiple battery cells BC that make up the battery pack. The busbar module 1 provided on the electrode arrangement surface BC1 is formed in an elongated shape along the first direction X, but in Figures 1 to 3 and Figure 10, only a part of the busbar module 1 is shown.

[0015] As shown in FIG. 2, the bus bar module case 10 includes a case 100 and a cover 200. The case 100 includes a case body 110 and a case cover 150. The bus bar module case 10 (the case body 110 of the case 100, the case cover 150 of the case 100, and the cover 200) is formed of an insulating resin material. The cover 200 is assembled to the case body 110 of the case 100 and covers a plurality of bus bars 20 (a plurality of bus bar cavities 111). The case cover 150 is provided on the case body 110 so as to be sandwiched between the cover 200 and the case body 110. Details of the case 100 and the cover 200 will be described later.

[0016] The plurality of bus bars 20 connect adjacent electrodes of a plurality of battery cells BC arranged side by side along the first direction X. As shown in FIGS. 2 and 3, each bus bar 20 is a conductor formed of a conductive metal plate. Each bus bar 20 has a first connection portion 21 connected to one electrode and a second connection portion 22 connected to another electrode adjacent to the one electrode. The first connection portion 21 and the second connection portion 22 each have electrode connection holes 21a and 22a connected to the electrodes. The first connection portion 21 and the second connection portion 22 are electrically connected by a connecting portion 23. The connecting portion 23 is electrically connected to the voltage detection terminal 40.

[0017] The bus bar 20, for example, connects two adjacent battery cells BC in series. In this case, the bus bar 20 connects the positive electrode of one battery cell BC and the negative electrode of another battery cell BC. The bus bar 20 may be configured to connect two adjacent battery cells BC in parallel. Also, at the end of the bus bar module 1, a bus bar 20 connected to one electrode may be provided.

[0018] The cable routing material 30 is, for example, a flat cable routing material such as a flexible printed circuit board. When the cable routing material 30 is a flexible printed circuit board, the cable routing material 30 has a base film, a coverlay, and a conductive layer. The base film and coverlay are flexible insulating resin layers. The conductive layer is sandwiched and protected by the base film and the coverlay. The conductive layer is, for example, a conductive metal foil and has a plurality of circuit patterns connected to the busbar 20. The cable routing material 30 has two main lines 31 arranged along a first direction X, and branch lines 32 extending outward from each main line 31 along a second direction Y to the busbar 20.

[0019] The voltage detection terminal 40 is electrically connected to the busbar 20 and the branch portion 32 of the cable 30. The voltage detection terminal 40 detects the voltage between the electrodes of the busbar 20, and the voltage of the battery cell BC is monitored by a monitoring device (not shown) connected to the cable 30.

[0020] As shown in Figure 3, the case body 110 of case 100 has a plurality of busbar cavities 111. The plurality of busbar cavities 111 are arranged along the first direction X as a first busbar cavity arrangement section 131 and a second busbar cavity arrangement section 132. The first busbar cavity arrangement section 131 is provided on one side Y1 of the second direction Y. The second busbar cavity arrangement section 132 is provided on the other side Y2 of the second direction Y. The first busbar cavity arrangement section 131 and the second busbar cavity arrangement section 132 are formed approximately point-symmetrically with respect to the third direction Z. Therefore, in the following description, the first busbar cavity arrangement section 131 will be described, and a detailed description of the second busbar cavity arrangement section 132 will be omitted.

[0021] As shown in Figures 3 and 4, the busbar cavity 111 has a wall portion 112 on its outer edge. The wall portion 112 is formed in a substantially wall shape with one side Y1 wall surface 112a and the other side Y2 wall surface 112b facing the second direction Y. The wall surface 112b of the wall portion 112 is provided with two busbar retaining portions 112c that bulge toward the busbar 20 so as to face the first connection portion 21 and the second connection portion 22 of the busbar 20 in the second direction Y (see also Figure 6). The wall portions 112 of adjacent busbar cavities 111 are connected by a curved connecting portion 120.

[0022] Side wall portions 113 and 114 are provided on one side X1 and the other side X2 of the wall portion 112 in the first direction X, respectively. Side wall portion 113 is adjacent to the side wall portion 114 of the adjacent bus cavity 111 with a predetermined distance between them. Similarly, side wall portion 114 is adjacent to the side wall portion 113 of the adjacent bus cavity 111 with a predetermined distance between them.

[0023] In adjacent bus cavity 111, one portion of the two side walls 113 and 114 in the second direction Y is designated as the first case-side engaging portion 141 of the case-side engaging portion 140, which has a higher height along the third direction Z. The first case-side engaging portion 141 engages with the cover-side engaging portion 240, which will be described later, in a concave-concave manner (see Figure 9). The first case-side engaging portion 141 is formed to have the same height along the third direction Z as the second case-side engaging portion 142 in the partition portion 116, which will be described later.

[0024] Fixing protrusions 113a and 114a for engaging the busbar 20 are provided on the inner surfaces of the side wall portions 113 and 114, respectively. The first connection portion 21 and the second connection portion 22 of the busbar 20 are held by the fixing protrusions 113a and 114a of the side wall portions 113 and 114 and the busbar retaining portion 112c of the wall portion 112. The vicinity of the other end Y2 in the second direction Y of the side wall portion 114 is connected to the rear wall portion 115. The rear wall portion 115 is formed substantially parallel to the wall portion 112. At one end X1 in the first direction X of the rear wall portion 115, a branch cable portion 115a is formed, separated from the side wall portion 113. A voltage detection terminal 40, which is electrically connected to the branch portion 32 of the cable material 30, is arranged on the branch cable portion 115a.

[0025] The space enclosed by the wall portion 112, the side wall portions 113, 114, and the rear wall portion 115 is designated as the busbar arrangement portion 111a where the busbar 20 is located. The busbar arrangement portion 111a is provided with a substantially wall-shaped partition portion 116 that extends from the wall portion 112 to the other side Y2 in the second direction Y and is perpendicular to the wall portion 112. The wider portion of the partition portion 116 on one side Y1 in the second direction Y is designated as the second case-side engagement portion 142 of the case-side engagement portion 140. The second case-side engagement portion 142 engages with the cover-side engagement portion 240 of the cover 200, which will be described later, in a concave-concave manner, similar to the first case-side engagement portion 141 (see Figure 9). The first case-side engagement portion 141 is connected to the wall surface 112b of the wall portion 112.

[0026] A first connecting portion 21 of the busbar 20 is located on one side X1 of the partition portion 116 in the first direction X. A second connecting portion 22 of the busbar 20 is located on the other side X2 of the partition portion 116 in the first direction X. A stepped portion 111b is provided on the other side Y2 of the first connecting portion 21 and the second connecting portion 22 of the busbar arrangement portion 111a. On the other side Y2 in the second direction Y from the stepped portion 111b, an arrangement surface is formed that is higher on one side Z1 in the third direction Z than the first connecting portion 21 and the second connecting portion 22, and a connecting portion 23 of the busbar 20 is located there.

[0027] Furthermore, some of the multiple busbar cavities 111 have multiple locking portions 118 formed thereon that engage with the locking portion 218 of the cover 200, which will be described later. Each locking portion 118 has a plate-shaped locking support portion 118a formed to extend from the end face of one side Z1 in the third direction Z of the wall portion 112 of the busbar cavity 111 to the other side Z1, and a locking projection 118b projecting from the surface of one side Y1 in the second direction Y of the locking support portion 118a toward the other side Y1. The locking projection 118b is formed in a hook shape. Adjacent locking portions 118 along the first direction X are provided at predetermined intervals.

[0028] As shown in Figure 2, the first busbar cavity array section 131 and the second busbar cavity array section 132 are connected by a connecting section 117. In this way, the case body 110 is integrally formed. A roughly plate-shaped case cover 150 is positioned over the connecting section 117. As shown in Figure 3, on one side Z1 of the connecting section 117 in the third direction Z, and on the other side Z2 of the case cover 150 in the third direction Z, the main line 31 of the cable routing material 30 is routed, forming a cable routing path 151 (see also Figure 6). That is, the cable routing path 151 is provided between the first busbar cavity array section 131 and the second busbar cavity array section 132 in the second direction Y. In other words, the case cover 150 covers the cable routing path 151.

[0029] As shown in Figures 1, 2, and 5, the cover 200 of the busbar module case 10 is formed in a substantially flat shape that is long in the first direction X. The cover 200 is assembled to the case body 110 of the case 100 so as to cover a plurality of busbars 20 (a plurality of busbar cavities 111). More specifically, the cover 200 has a first cover 210 that covers a plurality of busbars 20 (a plurality of busbar cavities 111) of the first busbar cavity array section 131, and a second cover 220 that covers a plurality of busbars 20 (a plurality of busbar cavities 111) of the second busbar cavity array section 132. The first cover 210 and the second cover 220 are connected by a connecting section 230. The first cover 210 and the second cover 220 are formed substantially point-symmetrically with respect to the third direction Z. In the following explanation, we will describe the first cover 210, which is the cover 200 on one side Y1 in the second direction Y, and omit a detailed explanation of the second cover 220.

[0030] As shown in Figures 5 and 6, the first cover 210 of the cover 200 is provided with a first plate portion 211 with its surface facing the third direction Z, so as to cover the first connection portion 21 and the second connection portion 22 of the busbar 20 in each busbar cavity 111. On the other side Y2 of the first plate portion 211 in the second direction Y, a second plate portion 212 is provided, which is erected from the end of the other side Y2 of the first plate portion 211 toward one side Z1 of the third direction Z, with its surface facing the second direction Y. The end of the second plate portion 212 toward one side Z1 of the third direction Z is connected to a third plate portion 213, which is provided with its surface facing the third direction Z so as to cover the connecting portion 23 of each busbar 20. The end of the third plate portion 213 toward the other side Y2 of the second direction Y has a bent rib portion 213a formed so as to be bent toward the other side Z2 of the third direction Z.

[0031] At one end Y1 of the first plate portion 211 in the second direction Y, a projection 211a is formed that protrudes to one side Z1 in the third direction Z. The projection 211a is formed along the first direction X of the first plate portion 211. On the other side Z2 of the projection 211a in the third direction Z, a groove 211b is provided along the first direction X. On one side Y1 of the groove 211b in the second direction Y, an outer wall portion 215 is provided along the first direction X as a wall portion constituting the groove 211b, and on the other side Y2 of the groove 211b in the second direction Y, an inner wall portion 216 is provided along the first direction X as a wall portion constituting the groove 211b. Multiple cover-side engaging portions 240 are provided at predetermined intervals on the inner wall portion 216, which are formed in a concave shape by being cut out in a long rectangular shape with the first direction X as the longitudinal direction. As shown in Figure 6, the length H1 along the third direction Z from the bottom of the groove 211b to the tip of the inner wall portion 216 is longer than the length H2 along the third direction Z from the bottom of the groove 211b to the tip of the outer wall portion 215. Furthermore, a tapered portion 215a is formed on the groove 211b side of the tip portion of the outer wall portion 215. Also, an R-chamfered portion 216c is formed on the groove 211b side of the tip portion of the inner wall portion 216. Here, the tip of the wall portion 112 is rounded on the outer wall portion 215 side. As a result, when assembling the cover 200, the wall portion 112 with the rounded tip slides against the tapered portion 215a of the outer wall portion 215, making it easier to insert into the groove 211b between the outer wall portion 215 and the inner wall portion 216. Furthermore, the R-chamfered portion 216c of the inner wall portion 216 is close to the end of one side Z1 in the third direction Z of the busbar retaining portion 112c. In addition, the other side Y2 of the inner wall portion 216 in the second direction Y is provided with a number of reinforcing ribs 217 that connect to the first plate portion 211.

[0032] As shown in Figures 7 and 8, the first cover 210 of the cover 200 is provided with the aforementioned locking portion 218. Multiple locking portions 218 are provided along the first direction X, and adjacent locking portions 218 along the first direction X are provided at a predetermined interval (see Figure 1). The locking portion 218 has a locking retaining portion 218a formed in the shape of a flattened box. The locking retaining portion 218a is provided so as to protrude from one side Z1 in the third direction Z of the first plate portion 211 of the first cover 210 of the cover 200, and the other end Y2 in the second direction Y is connected to the second plate portion 212. The height of the locking retaining portion 218a in the third direction Z is lower than the height of the second plate portion 212 in the third direction Z.

[0033] The lock-holding portion 218a comprises two side plates 218a1 arranged with their surfaces facing a first direction X, and a top plate 218a2 that spans both side plates 218a1 on one side Z1 in the third direction Z. A V-shaped projection 218b is provided on the edge of the top plate 218a2 on one side Y1 in the second direction Y, projecting toward one side Z1 in the third direction Z and aligned with the first direction X of the top plate 218a2. The top plate 218a2 is also provided with a triangular lock indicator portion 218d that indicates the locked position. Furthermore, the two side plates 218a1 of the lock-holding portion 218aa extend to the edge of the projection 211a of the first plate portion 211 on one side Y1 in the second direction Y. The end faces of one side Y1 in the second direction Y of the two side plates 218a1 are continuous with the outer surface 215b of the outer wall portion 215. The lock holding portion 218a is provided with an edge plate 218a3 whose plate surface is oriented in the second direction Y so as to connect the two side plates 218a1 and the top plate 218a2. As shown in Figure 8, the edge plate 218a3 is provided so as to be continuous with the inner wall portion 216. The edge plate 218a3 has a hook-shaped step portion 218a4 formed on the other side Z2 in the third direction Z of the V-shaped projection 218b, which is the part that connects to the top plate 218a2.

[0034] The locking portion 218 has a locking hole 218c formed therein, where the bottom of the groove 211b in the first cover 210 of the cover 200, located between the two side plates 218a1, opens along the first direction X. When the locking projection 118b of the locking portion 118 is inserted into the locking hole 218c, the hook-shaped locking projection 118b becomes capable of contacting the jaw portion of the locking projection 118b with the end face of one side Z1 in the third direction Z of the outer wall portion 215. In this way, the locking portion 218 locks with the locking portion 118.

[0035] The locking portion 218 and the locking portion 118 engage, thereby attaching the cover 200 to the case body 110 of the case 100 and covering the multiple busbars 20 (multiple busbar cavities 111). As shown in Figure 9, the cover-side engaging portion 240 of the inner wall portion 216 engages with the case-side engaging portion 140 of the case body 110 in a concave-concave manner, thereby positioning the cover 200 relative to the case body 110 in the first direction X.

[0036] As shown in Figure 10, even if someone tries to pry open the busbar module case 10 of the busbar module 1 by forcibly inserting the tip of a wire switch into the end of the cover 200 in the second direction Y and the end of the case body 110 in the second direction Y, the entry of the wire switch into the interior of the busbar module case 10 is restricted, even when the cover 200 of the busbar module 1 is assembled to the case body 110 of the case 100, that is, when the locking portion 118 of the case body 110 and the locking portion 218 of the cover 200 are locked together.

[0037] As shown in Figure 11, when the cover 200 is pried open by the wire SW, the wire SW is located on the other side Z2 of the third direction Z on the outer wall portion 215 and on the one side Z1 of the third direction Z on the wall portion 112 of the case body 110. Therefore, the cover 200 is pried open on the one side Z1 of the third direction Z. However, the tip of the wire SW comes into contact with the outer surface 216a of the inner wall portion 216 (in the first cover 210 in Figure 11, the surface on the one side Y1 of the second direction Y on the inner wall portion 216), and entry into the interior is restricted. Here, the outer surface 216a of the inner wall portion 216 is provided with an exposed area S1 that is exposed from the gap between the tip 112f of the wall portion 112 and the tip 215f of the outer wall portion 215 when viewed from the outside in the second direction Y, with the tip 215f of the outer wall portion 215 separated from the tip 112f of the wall portion 112 in the third direction Z. Furthermore, the outer surface 216a of the inner wall portion 216 is provided with a non-exposed area S2 that is located adjacent to the tip 216f side of the inner wall portion 216 with respect to the exposed area S1, and is not exposed from the gap between the tip 112f of the wall portion 112 and the tip 215f of the outer wall portion 215 when viewed from the outside in the second direction Y, with the tip 215f of the outer wall portion 215 separated from the tip 112f of the wall portion 112 in the third direction Z.

[0038] Therefore, even if the cover 200 is pried open by the wire switch, causing the tip 215f of the outer wall portion 215 and the tip 112f of the wall portion 112 to separate, the exposed area S1 of the inner wall portion 216 is positioned adjacent to the inside of the wall portion 112, so the wire switch comes into contact with the exposed area S1. Furthermore, the non-exposed area S2 reduces the likelihood of the wire switch entering the other side Z2 of the third direction Z at the tip 216f of the inner wall portion 216, thereby further priing open the inner wall portion 216. In particular, since the inner wall portion 216 is provided along the first direction X between at least two locking portions 218, the entry of the wire switch is restricted even in the approximately central portion between the locking portions 218, which is the most flexible (easily pried open) portion. Furthermore, even if the inner wall portion 216 is strongly pressed by the tip of the wire SW towards the other side Y2 in the second direction Y, the inner wall portion 216 is supported by the rib 217 and is therefore less likely to be damaged.

[0039] The busbar module case 10 of the busbar module 1 described above comprises a case 100 having a plurality of busbar cavities 111 each housing a plurality of busbars 20 connected to the electrodes of a plurality of battery cells BC arranged in a row, and a cover 200 assembled to the case 100 and covering the plurality of busbars 20. The case 100 has a wall portion 112 provided along the arrangement direction of the plurality of busbars 20, and the cover 200 has an outer wall portion 215 provided outside the wall portion 112 along a first direction X (arrangement direction) and an inner wall portion 216 provided inside the wall portion 112 along the first direction X. The length H1 of the inner wall portion 216 in the third direction Z (height direction) perpendicular to the first direction X is longer than the length H2 of the outer wall portion 215 in the third direction Z. The busbar module 1 includes the above busbar module case 10 and the plurality of busbars 20.

[0040] As a result, even if someone tries to pry open the busbar module case 10 with a thin tool such as a wire switch, the tip of the wire switch will come into contact with the inner wall portion 216. Therefore, regardless of the force used to pry it open, the entry of the wire switch can be physically restricted, ensuring that the cover 200 is properly assembled to the case 100.

[0041] Furthermore, the outer surface 216a of the inner wall portion 216 is provided with an exposed area S1 that is exposed from the gap between the tip 112f of the wall portion 112 and the tip 215f of the outer wall portion 215 when viewed from the outside in the second direction Y, with the tip 215f of the outer wall portion 215 separated from the tip 112f of the wall portion 112 in the third direction Z. As a result, even if a wire switch or the like enters the gap between the tip 215f of the outer wall portion 215 and the tip 112f of the wall portion 112, the wire switch or the like will come into contact with the exposed area S1, thereby preventing the wire switch or the like from entering the inside of the busbar module case 10.

[0042] Furthermore, on the outer surface 216a of the inner wall portion 216, a non-exposed area S2 is provided, which is located adjacent to the tip 216f side of the inner wall portion 216 with respect to the exposed area S1. This area is not exposed when viewed from the outside in the second direction Y, with the tip 215f of the outer wall portion 215 separated from the tip 112f of the wall portion 112 in the third direction Z. As a result, the exposed area S1 is located over the entire area of ​​the gap in the third direction Z, thus more reliably preventing the entry of wires SW and the like. Note that the exposed area S1 and the non-exposed area S2 are formed along the first direction X.

[0043] Furthermore, the inner wall portion 216 has a cover-side engaging portion 240 that engages with the case-side engaging portion 140 on the case body 110 of the case 100 in a recessed and recessed manner. This facilitates the positioning of the cover 200 relative to the case 100 (case body 110) in the first direction X.

[0044] Furthermore, the case 100 has at least two locking parts 118 provided along the first direction X, the cover 200 has a plurality of locking parts 218 that lock onto each locking part 118, and the inner wall part 216 is provided between the locking parts 218 along the first direction X. The area near the intermediate position between the two locking parts 118 (locking parts 218) is the most flexible and therefore the easiest area to pry open with a wire switch, etc. However, with this configuration, the entry of a wire switch, etc., can be properly restricted even near this intermediate position.

[0045] Furthermore, the busbar cavity 111 includes a wall portion 112, which is formed on the outer edge of the case 100. On the opposite side of the wall portion 112 in the busbar cavity 111 along the second direction Y, a routing path 151 is formed, which provides a routing material 30 electrically connected to the busbar 20. This makes it possible to provide a busbar module case 10 for a busbar module 1 that is assembled to a battery module BM having a plurality of battery cells BC with electrodes arranged on one side Y1 and the other side Y2 of the second direction Y, by providing a routing path 151 between the first busbar cavity arrangement portion 131 and the second busbar cavity arrangement portion 132, thereby ensuring a proper assembly state of the cover 200 to the case 100.

[0046] Furthermore, the busbar module case and busbar module according to the embodiments of the present invention described above are not limited to the embodiments described above, and various modifications are possible within the scope of the claims.

[0047] In the above description, the case-side engaging portion 140 of case 100 is configured as a convex side, and the cover-side engaging portion 240 of cover 200 is configured as a concave side, creating a concave-convex engagement. However, the concave-convex relationship may be reversed. Also, the locking portion 118 provided on case 100 and the locking portion 218 of cover 200 are configured such that the locking projection 118b of the locking portion 118 is inserted into the locking hole 218c of the locking portion 218. However, other configurations can be adopted as long as the case 100 and cover 200 can be locked together. Furthermore, the busbar module case 10 has a cable routing path 151 between the first busbar cavity arrangement portion 131 and the second busbar cavity arrangement portion 132. For example, the cable routing path 151 can be provided on the outside of the busbar cavity 111. In this case, the wall portion 112, the outer wall portion 215, and the inner wall portion 216 can be provided on the outer edge of the cable routing path 151.

[0048] The busbar module case and busbar module according to this embodiment may be constructed by appropriately combining the components of the embodiments and modified examples described above. [Explanation of Symbols]

[0049] 1: Busbar Module 10: Busbar Module Case 20: Busba 30: Routing material 100: Case 110: Case body 111: Bass Cavity 112: Wall 112a: Wall surface 112b: Wall surface 112f: Tip 118: Locking part 140: Case-side engagement part 150: Case cover 151: Cableway 200: Cover 215:Outer wall 215f: Tip 216:Inner wall 216a: Exterior 216f: Tip 218: Rock Club 240: Cover-side engagement part BC: Battery cell S1:Exposed area S2: Non-exposed area X: First direction (arrangement direction) Y: Second direction (towards the wall) Z: Third direction (height direction)

Claims

1. A case having multiple busbar cavities, each housing multiple busbars connected to the electrodes of multiple battery cells arranged in a row, A cover assembled to the case and covering multiple busbars, Equipped with, The case has wall portions provided along the arrangement direction of the plurality of busbars, The cover has an outer wall portion provided on the outside of the wall portion along the direction of arrangement, and an inner wall portion provided on the inside of the wall portion along the direction of arrangement. The length of the inner wall portion in the height direction perpendicular to the arrangement direction is longer than the length of the outer wall portion in the height direction. Busbar module case.

2. On the outer surface of the inner wall portion, an exposed area is provided that, when viewed from the outside in the wall surface direction perpendicular to the arrangement direction and the height direction, is exposed from the gap between the tip of the wall portion and the tip of the outer wall portion, with the tip of the outer wall portion separated from the tip of the wall portion in the height direction. The busbar module case according to claim 1.

3. On the outer surface of the inner wall portion, a non-exposed area is provided that is positioned adjacent to the tip side of the inner wall portion with respect to the exposed area, and is separated in the height direction from the tip of the outer wall portion, and is not exposed from the gap when viewed from the outside in the direction of the wall surface. The busbar module case according to claim 2.

4. The inner wall portion has a cover-side engaging portion that engages with the case-side engaging portion of the case in an interlocking manner. A busbar module case according to any one of claims 1 to 3.

5. The case has at least two or more locking parts provided along the direction of arrangement, The cover has a plurality of locking parts that engage with each of the locking parts, The inner wall portion is provided between the locking portions along the arrangement direction, A busbar module case according to any one of claims 1 to 3.

6. The bus cavity includes the wall portion, The aforementioned wall portion is formed on the outer edge of the case, On the opposite side of the wall portion in the busbar cavity along the wall direction perpendicular to the arrangement direction and the height direction, a cable routing path is formed, which is provided for cable routing members electrically connected to the busbar. A busbar module case according to any one of claims 1 to 3.

7. Multiple busbars connected to the electrodes of multiple battery cells arranged in a row, The device comprises a case having a plurality of busbar cavities for housing a plurality of busbars, and a cover assembled to the case and covering the plurality of busbars, wherein the case has wall portions provided along the arrangement direction of the plurality of busbars, and the cover has an outer wall portion provided outside the wall portions along the arrangement direction, and an inner wall portion provided inside the wall portions along the arrangement direction, wherein the length of the inner wall portion in the height direction perpendicular to the arrangement direction is longer than the length of the outer wall portion in the height direction. Busbar module.

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