Bus bar module case and bus bar module

Abstract

To provide a bus bar module case and a bus bar module capable of appropriately realizing the configuration of a cover.SOLUTION: The bus bar module case 100 includes a case body 50 having a plurality of bus bar cavities 200 in each of which a bus bar 2 connected to an electrode 211n of a battery cell 211 of a plurality of battery cells 211 arranged side by side is housed and a routing path 30 in which a routing material 3 electrically connected to the bus bar 2 including a trunk line 3a and a plurality of branch portions 3b is provided, a cover 400 having a trunk line protection portion 41 protecting the trunk line 3a and a plurality of branch protection portions 42 protecting the branch portions 3b, a hinge portion 60 connecting the cover 400 and the case body 50 via the branch protection portion 42, and a lock portion 10 locking the cover 400 to the case body 50.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a busbar module case and a busbar module. [Background technology]

[0002] As an example of technology relating to conventional busbar module cases and busbar modules, Patent Document 1 discloses a busbar module that is attached to the side of a battery assembly to form a power supply device. The busbar module has a case that includes a plurality of busbar accommodating sections, voltage detection terminals provided adjacent to each busbar accommodating section, a wiring section for routing voltage detection wires connected to the voltage detection terminals, a cover that covers a predetermined area of ​​the wiring section, a hinge section that moves the cover between a closed position that covers the opening of the wiring section and an open position that exposes the opening of the wiring section, and a lock section that locks the cover in the closed position. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-93218 Summary of the Invention [Problem to be solved by the invention]

[0004] In such a busbar module case and busbar module, for example, the cover is opened and closed by a hinge portion and locked by a lock portion, but there is room for further improvement in the configuration, including the arrangement of the hinge portion and the lock portion.

[0005] The present invention has been made in view of the above circumstances, and has an object to provide a bus bar module case and a bus bar module that can appropriately realize a cover configuration. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the busbar module case of the present invention comprises: a case body having a plurality of busbar cavities that respectively accommodate busbars connected to electrodes of a plurality of battery cells arranged side by side, and a wiring path that includes a main line and a plurality of branches and in which wiring material electrically connected to the busbars is provided; a cover having a main line protection portion that protects the main line and a plurality of branch protection portions that protect the branch portions; a hinge portion that connects the cover to the case body via the branch protection portions; and a lock portion that engages the cover to the case body.

[0007] In order to achieve the above-mentioned object, the busbar module of the present invention comprises a busbar connected to an electrode of a battery cell in a plurality of battery cells arranged side by side, a wiring material including a main line and a plurality of branches and electrically connected to the busbar, and a busbar module case, wherein the busbar module case comprises a case main body having a plurality of busbar cavities that accommodate the busbar and a wiring path in which the wiring material is provided, a cover having a main line protection portion that protects the main line and a plurality of branch protection portions that protect the branch portions, a hinge portion that connects the cover to the case main body via the branch protection portions, and a lock portion that engages the cover to the case main body. [Effects of the Invention]

[0008] The bus bar module case and bus bar module according to the present invention have an effect of enabling the cover configuration to be properly realized. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view illustrating a busbar module according to an embodiment with its cover open. [Figure 2] FIG. 2 is an enlarged front view of a portion P1 in FIG. [Figure 3] FIG. 3 is an enlarged perspective view seen from the P2 direction in FIG. [Figure 4] FIG. 4 is a perspective view illustrating a state in which the cover of the bus bar module according to the embodiment is closed. [Figure 5] FIG. 5 is a cross-sectional view taken along line VV of FIG. [Figure 6] FIG. 6 is a perspective view illustrating a bus bar module according to a modified example of the embodiment with the cover open. [Figure 7] FIG. 7 is a perspective view illustrating a busbar module according to a modified example of the embodiment with the cover closed. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments. Furthermore, the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially the same.

[0011] [Embodiment] 1 and 2, a battery module 210 of this embodiment includes a plurality of battery cells 211 and a busbar module 1. The battery module 210 of this embodiment is a component of a battery pack 200. The battery pack 200 may include a plurality of battery modules 210. The battery pack 200 is mounted as a power source in a vehicle such as an electric vehicle or a hybrid electric vehicle, for example.

[0012] In the following description, the direction in which the multiple battery cells 211 are arranged side by side is referred to as the first direction X, and the two directions perpendicular to the first direction X are referred to as the second direction Y and the third direction Z. The third direction Z is a direction perpendicular to the installation surface 211b of the multiple battery cells 211. In the following description, one side of the first direction X will be referred to as one side X1, and the other side will be referred to as the other side X2. Similarly, the second direction Y will be referred to as one side Y1 and the other side Y2, and the third direction Z will be referred to as one side Z1 and the other side Z2. In the following description, the third direction Z will be referred to as the vertical direction, and the one side Z1 will also be referred to as the upper side and the other side Z2 as the lower side.

[0013] The battery cells 211 constitute so-called single cells, and a plurality of them are arranged along the first direction X to form an assembled battery. The surfaces (not shown) of the plurality of battery cells 211 on one side Y1 and the other side Y2 in the second direction Y of the assembled battery are configured as electrode arrangement surfaces 211a (the electrode arrangement surface 211a on the other side Y2 is not shown) on which the electrodes 211n of each battery cell 211 are arranged. The electrode arrangement surfaces 211a are parallel to a plane including the first direction X and the third direction Z. Each battery cell 211 has two electrode arrangement surfaces 211a, one of which has a positive electrode arranged on it, and the other has a negative electrode arranged on it. A busbar module 1 is provided on each of the two electrode arrangement surfaces 211a. The busbar module 1 is formed elongated along the first direction X, but only a portion of the busbar module 1 is shown in FIGS. 1 and 4.

[0014] Plate-shaped plate members 212 are provided at the ends of the battery module 210 (plurality of battery cells 211). In this embodiment, the plate members 212 are referred to as end plates and are made of, for example, synthetic resin. The plate members 212 are arranged on both ends of the plurality of battery cells 211 so as to sandwich and hold the aligned battery cells 211. FIG. 1 illustrates the plate members 212 arranged at the end on the other side X2 in the first direction X, but does not illustrate the plate members 212 arranged at the end on one side X1 (the same applies to FIGS. 4, 6, and 7). The plate member 212 has busbar module arrangement surfaces 212a along the third direction Z on both one side Y1 and the other side Y2 in the second direction Y. Ends of the busbar modules 1 are arranged on the busbar module arrangement surfaces 212a. The busbar module arrangement surfaces 212a are aligned with the electrode arrangement surfaces 211a of the battery cells 211 in the first direction X.

[0015] As shown in FIG. 2, the busbar module 1 includes a busbar module case 100, a busbar 2, and a wiring material 3. The busbar 2 and the wiring material 3 are only shown in FIG. 2. The busbar module case 100 is integrally formed from an insulating resin material. The busbar module case 100 has a case main body 50, a cover 40, a hinge portion 60, and a locking portion 10. The cover 40 is provided so as to be able to open and close relative to the case main body 50. The case main body 50 has a case main body side engaging portion 12 of the locking portion 10, a busbar cavity 20 that accommodates the busbar 2 therein, and a wiring path 30 in which the wiring material 3 is provided. The busbar cavity 20 and the wiring path 30 integrally form the case main body 50. The wiring path 30 includes a main wiring path 35 in which the main line 3a of the wiring material 3 is provided, and a branch wiring path 36 in which the branch portion 3b of the wiring material 3 is provided. The busbar module case 100 will be described in detail later.

[0016] The busbar 2 is connected to the electrodes 211n of the battery cells 211 among the plurality of battery cells 211 arranged along the first direction X. The busbar 2 is a conductor formed of a conductive metal plate. The busbar 2 is formed in a substantially rectangular shape with the longitudinal direction of the first direction X so as to connect to each electrode 211n of adjacent battery cells 211. In this embodiment, at an end of the battery module 210, the busbar 2 is connected to one electrode 211n of the battery cell 211 at the end. The busbar 2 has an electrode connection hole 2a that is a circular through hole. The busbar 2 is fixed to the electrode 211n via the electrode connection hole 2a. The busbar 2 connects, for example, two adjacent battery cells 211 in series. In this case, the busbar 2 connects the positive electrode of one battery cell 211 to the negative electrode of another battery cell 211. The busbar 2 may also be configured to connect two adjacent battery cells 211 in parallel. Although the bus bar 2 is shown in a substantially flat plate shape in this embodiment, it may have a protrusion following the beam portion 22 so as not to interfere with the beam portion 22 described later.

[0017] The wiring material 3 is, for example, a flat wiring material such as a flexible printed circuit board. When the wiring material 3 is a flexible printed circuit board, the wiring material 3 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 between the base film and the coverlay. The conductive layer is, for example, a conductive metal foil and has multiple circuit patterns connected to the bus bar 2. The wiring material 3 has a trunk line 3a electrically connected to the bus bar 2 and arranged along the first direction X, and a branch portion 3b extending from the trunk line 3a to one side Z1 in the third direction Z.

[0018] The busbar module 1 may also be provided with a voltage detection terminal (not shown). The voltage detection terminal is electrically connected to the busbar 2 and the branch portion 3b of the wiring material 3. The voltage detection terminal detects the voltage between the electrodes of the busbar 2, and the voltage of the battery cell 211 is monitored by a monitoring device (not shown) connected to the wiring material 3.

[0019] The busbar cavity 20 in the case body 50 of the busbar module case 100 has a side wall 21. The side wall 21 is formed in a generally frame-like shape with one side Y1 and the other side Y2 in the second direction Y open, and stands upright around the edge 2b that forms the outer periphery of the busbar 2. The side wall 21 is formed as a generally plate-like member that stands upright generally perpendicular to the electrode placement surface 211a and is formed in a generally elongated rectangular shape with the longitudinal direction in the first direction X so as to surround the busbar 2.

[0020] The side wall 21 on one side X1 in the first direction X is divided into one side Z1 and the other side Z2 in the third direction Z, and are spaced apart in the first direction X. The portion where the side wall 21 on one side X1 in the first direction X is spaced apart forms a branch wiring path 36 of the wiring path 30 in which the branch portion 3b of the wiring material 3 is routed. Furthermore, a beam portion 22 is provided in an approximate center portion in the first direction X inside the bus bar cavity 20, spanning from the side wall 21 on one side Z1 in the third direction Z to the side wall 21 on the other side Z2. Although not shown, the beam portion 22 has a generally U-shaped cross section parallel to a plane including the first direction X and the second direction Y. The beam portion 22 is provided with an opening side of the generally U-shaped cross section facing the other side Y2 in the second direction Y. Furthermore, a plurality of bus bar locking portions 29 are provided on the side wall 21. Each bus bar locking portion 29 is formed in the shape of a leaf spring, and has slits on both sides to provide elasticity. The bus bar locking portion 29 can fix the bus bar 2 accommodated in the bus bar cavity 20.

[0021] As shown in FIGS. 2 and 5, the main wiring path 35 of the wiring path 30 in the busbar module case 100 is provided on the other side Z2 of the busbar cavity 20 in the third direction Z. When the busbar module 1 is installed on a plurality of battery cells 211 (hereinafter, sometimes simply referred to as the "installed state"), the other side Z2 in the third direction Z is the lower side of the busbar cavity 20 in the vertical direction. The wiring path 30 includes a main plate 31 and a bottom plate 32. The main plate 31 and the bottom plate 32 extend in the first direction X. The main plate 31 is connected to a lower wall 21a, which is the side wall 21 on the other side Z2 in the third direction Z of the busbar cavity 20, and is provided with its plate surface facing the second direction Y. The bottom plate 32 is connected to an end of the main plate 31 on the other side Z2 in the third direction Z, and is formed to protrude toward one side Y1 in the second direction Y, with its plate surface facing the third direction Z. The main cable routing path 35 is formed by the surface of the lower wall 21a on the other side Z2 in the third direction Z, the surface of the main plate 31 on the one side Y1 in the second direction Y, and the surface of the bottom plate 32 on the one side Z1 in the third direction Z. A main wire 3a of the routing material 3 is routed in the main cable routing path 35. The main cable routing path 35 is formed long in the first direction X.

[0022] A case body side locking portion 12 that is engaged with a cover side locking portion 11 (described later) is provided on the surface of the other side Z2 in the third direction Z of the bottom plate 32 of the wiring passage 30. A plurality of the case body side locking portions 12 are provided at predetermined intervals along the first direction X. The case body side locking portion 12 is formed in a substantially rectangular cylindrical shape.

[0023] The cover 40 is formed in a generally plate-like shape and, when the cover 40 is open, is provided on one side Z1 of the case body 50 in the third direction Z (i.e., on the upper side of the case body 50). The cover 40 has a trunk line protecting portion 41 and multiple branch protecting portions 42. In this embodiment, the cover 40 is integrally formed with one trunk line protecting portion 41 and three branch protecting portions 42. FIG. 1 shows two sets of covers 40. That is, the cover 40 can be provided in separate portions for each predetermined number of branch protecting portions 42, and multiple covers 40 can be provided for one case body 50.

[0024] The trunk line protecting portion 41 of the cover 40 is formed along the first direction X. The three branch protecting portions 42 are each formed along the third direction Z from the trunk line protecting portion 41. When the cover 40 is in the open state in FIG. 1, the branch protecting portions 42 are formed toward the other side Z2 in the third direction Z. The tip portions of the branch protecting portions 42 are formed wide and protrude toward the other side X2 in the first direction X. Furthermore, of the two end edges 41a, 41b of the trunk line protecting portion 41, the end edge 41b where the branch protecting portion 42 is provided and the end edges 42a, 42b of the branch protecting portion 42 are provided with ribs 43 along each of the end edges 41b, 42a, 42b.

[0025] The hinge portion 60 connects the cover 40 and the case body 50 via the branch protection portion 42. Specifically, the hinge portion 60 is provided at the tip of the branch protection portion 42 of the cover 40, and is connected to the upper wall 21b (see FIG. 2), which is the upper side wall 21 of the busbar cavity 20 of the case body 50. In other words, the hinge portion 60 is located vertically above the busbar module 1 (busbar module case 100) when it is installed. The hinge portion 60 is formed in a thin plate shape and is flexible.

[0026] The cover-side locking portions 11 are provided on the edge 41a of the trunk line protection portion 41. The cover-side locking portions 11 are provided at predetermined intervals along the trunk line protection portion 41 (first direction X). In a set of covers 40 having three branch protection portions 42, two cover-side locking portions 11 are provided. The cover-side locking portions 11 are locked to case body-side locking portions 12 provided in the wiring path 30 of the case body 50. The cover-side locking portions 11 and the case body-side locking portions 12 form a locking portion 10. As shown in FIG. 3, when the cover 40 is open, the cover-side locking portion 11 is provided with a base plate 11a that protrudes toward one side Y1 in the second direction Y, and a protrusion 11b that protrudes from the plate surface of the base plate 11a on one side Z1 in the third direction Z. The protrusion 11b is formed in a generally mountain-like shape with an inclined surface 11b1. A jaw portion 11b2 is formed on the protrusion portion 11b opposite to the inclined surface 11b1 along the second direction Y. The jaw portion 11b2 is formed perpendicular to the plate surface of the base plate 11a.

[0027] When the cover 40 of the busbar module 1 (busbar module case 100) is closed, the cover 40 covers the wiring path 30, as shown in Fig. 4. The main line protection portion 41 of the cover 40 covers the main line wiring path 35 to protect the main line 3a of the wiring material 3, and the branch protection portion 42 covers the branch wiring path 36 to protect the branch portion 3b. As shown in Fig. 5, when the cover 40 is closed, the cover-side engaging portion 11 of the locking portion 10 is inserted into and engaged with the case body-side engaging portion 12 of the locking portion 10. Specifically, the cover-side locking portion 11 is inserted into the through-hole 12a of the case body-side locking portion 12 from the tip side, which is the side of the inclined surface 11b1, of the protrusion 11b of the cover-side locking portion 11, and the inclined surface 11b1 pushes open the through-hole 12a (particularly, the lower plate portion 12b on the other side Z2 in the third direction Z of the case body-side locking portion 12), and the jaw portion 11b2 of the protrusion 11b locks with the end portion on the other side Y2 in the second direction Y of the case body-side locking portion 12. In other words, the protrusion 11b of the cover-side locking portion 11 faces downward when the locking portion 10 is locked, and therefore pushes open the lower plate portion 12b of the case body-side locking portion 12, which has lower rigidity than the bottom plate 32, and is locked by the case body-side locking portion 12. In other words, the protrusion 11b of the cover side locking portion 11 protrudes toward the outside of the busbar cavity 20, and a hole-like portion is formed in the case body side locking portion 12 that can be deformed in accordance with the protruding direction of the protrusion 11b, thereby allowing the locking portion 10 to be formed with a simple configuration.

[0028] [Variations] 6 and 7 show a modified example of this embodiment. In this modified example, the position of the locking unit 10 of this embodiment is changed, and a cover-side locking unit 11 is provided on the branch protecting unit 42, and a case body-side locking unit 12 is provided on the side of the branch wiring path 36. More specifically, the cover-side locking unit 11 is provided on the base end side of the branch protecting unit 42 (the side where the branch protecting unit 42 and the main line protecting unit 41 are connected), and the case body-side locking unit 12 is arranged on the side of the branch wiring path 36 on the main line wiring path 35 side (one side X1 in the first direction X) in correspondence with the position of the cover-side locking unit 11. In this way, the arrangement position of the locking unit 10 can be set arbitrarily.

[0029] The busbar module case 100 described above includes a case body 50 having a plurality of busbar cavities 20 that respectively accommodate busbars 2 connected to electrodes 211n of battery cells 211 arranged side by side, and a wiring path 30 in which a wiring material 3 including a trunk 3a and a plurality of branch portions 3b and electrically connected to the busbar 2 is provided, a cover 40 having a trunk line protection portion 41 that protects the trunk 3a and a plurality of branch protection portions 42 that protect the branch portions 3b, a hinge portion 60 that connects the cover 40 to the case body 50 via the branch protection portions 42, and a lock portion 10 that locks the cover 40 to the case body 50. The busbar module 1 includes the busbar 2, the wiring material 3, and the busbar module case 100.

[0030] This makes it possible to provide a busbar module case and a busbar module that can appropriately realize the cover configuration. For example, if the cover 40 is provided below the case body 50 and a hinge portion 60 is provided between the main line protection portion 41 of the cover 40 and the bottom plate 32 of the wiring path 30 so as to connect the cover 40 to the case body 50 via the main line protection portion 41 of the cover 40, the tip of the branch protection portion 42 becomes a free end. Therefore, when the cover 40 is closed, rattle may occur, especially at the tip portion, of the thin branch protection portion 42. To prevent this rattle, a locking portion 10 may be provided so as to lock the tip portion of the branch protection portion 42. In particular, in a busbar module 1 installed in a battery pack used as a power source for a vehicle, etc., locking portions 10 may be provided at all tip portions of the branch protection portion 42 to secure it in place in order to prevent rattle due to vibration. If locking sections 10 (cover side engaging sections 11) are provided on all branch protection sections 42, the number of locking sections 10 will increase, which will increase the amount of work required to insert and lock the cover side engaging sections 11 into the case body side engaging sections 12, which may result in an increase in the number of steps in the assembly work of the busbar module 1.

[0031] Therefore, according to this embodiment, the hinge portion 60 is provided to connect the cover 40 and the case main body 50 via the branch protection portions 42 of the cover 40. This prevents the branch protection portions 42 from becoming free ends, eliminating the need to provide a locking portion 10 for each branch protection portion 42. Therefore, the number of locking portions 10 can be set to a number that prevents the cover 40 from rattling due to vibration or the like, allowing the cover 40 to be properly configured. In this embodiment, two locking portions 10 are required for three branch protection portions 42 to lock the cover 40 to the case main body 50, eliminating the need to provide the same number of locking portions 10 as the branch protection portions 42. In other words, the busbar module case 100 is provided with fewer locking portions 10 than the number of hinge portions 60.

[0032] Furthermore, the hinge portion 60 is provided in all of the branch protection portions 42. This makes it possible to reduce the number of branch protection portions 42 that end up as free ends.

[0033] Furthermore, the locking portion 10 includes a cover-side locking portion 11 provided on the cover 40 and a case-body-side locking portion 12 provided on the case body 50 and locking with the cover-side locking portion 11, and the cover-side locking portion 11 is provided on the main line protection portion 41. This allows the main line protection portion 41 of the cover 40, which is a free end, to be locked to the case body 50 more reliably.

[0034] Furthermore, the locking portion 10 includes a cover-side locking portion 11 provided on the cover 40 and a case body-side locking portion 12 provided on the case body 50 and locking with the cover-side locking portion 11, and the cover-side locking portion 11 may be provided on the branch protection portion 42. This allows the cover 40 to be locked to the case body 50 while the branch protection portion 42 is fixed.

[0035] Furthermore, the hinge portion 60 is provided at the tip of the branch protection portion 42, and is positioned vertically above the busbar module case 100 (case body 50) when installed on the multiple battery cells 211. This allows the cover 40 to be opened and closed in an upward-opening manner, that is, so that the other side Z2 of the cover 40 in the third direction Z approaches or moves away from the case body 50. Therefore, even if the locking portion 10 is released, the cover 40 can be kept closed by its own weight.

[0036] The bus bar module case and the bus bar module according to the above-described embodiment of the present invention are not limited to the above-described embodiment, and various modifications are possible within the scope of the claims.

[0037] In the above description, the locking portion 10 is provided on the edge 41a of the trunk line protection portion 41 of the cover 40 or on the base end side of the branch protection portion 42, but the arrangement of the locking portion 10 can be set so that the cover-side engaging portion 11 is located at any position on the cover 40. The locking portion 10 is composed of the cover-side engaging portion 11 and the case body-side engaging portion 12, which are fitted together, but other engaging structures can also be used. Also, the hinge portion 60 does not need to be provided on all branch protection portions 42. Furthermore, the wiring material 3 can be a flexible printed circuit board, a flexible flat cable, or an electric wire.

[0038] The bus bar module case and bus bar module according to this embodiment may be configured by appropriately combining the components of the embodiments and modified examples described above. [Explanation of symbols]

[0039] 1: Busbar module 2: Bus bar 3: Routing material 3a: Main line 3b: Branch 10: Rock Club 11: Cover side locking part 12: Case body side locking part 20: Busbar cavity 30: Cable routing 40: Cover 41: Main line protection section 42: Branch protection part 50: Case body 60: Hinge part 100: Busbar module case 211: Battery cell 211n: Electrode

Claims

1. a case body having a plurality of bus bar cavities that respectively accommodate bus bars connected to electrodes of a plurality of battery cells arranged side by side, and a wiring path that includes a trunk line and a plurality of branches and in which wiring material electrically connected to the bus bars is provided; a cover having a trunk line protection portion for protecting the trunk line and a plurality of branch protection portions for protecting the branch lines; a hinge portion that connects the cover and the case body via the branch protection portion; a locking portion that locks the cover to the case body; Equipped with Busbar module case.

2. The hinge portion is provided on all of the branch protection portions. The busbar module case according to claim 1 .

3. the locking portion includes a cover-side engaging portion provided on the cover, and a case-body-side engaging portion provided on the case body and engaging with the cover-side engaging portion, The cover-side locking portion is provided on the main line protection portion. The busbar module case according to claim 1 or 2.

4. the locking portion includes a cover-side engaging portion provided on the cover, and a case-body-side engaging portion provided on the case body and engaging with the cover-side engaging portion, The cover-side locking portion is provided on the branch protection portion. The busbar module case according to claim 1 or 2.

5. the hinge portion is provided at a tip end of the branch protection portion and is positioned vertically above the plurality of battery cells when the hinge portion is installed thereon; The busbar module case according to claim 1 or 2.

6. a bus bar connected to an electrode of a plurality of battery cells arranged side by side; a wiring material including a trunk line and a plurality of branches and electrically connected to the bus bar; a busbar module case; Equipped with The busbar module case includes: a case body having a plurality of bus bar cavities for accommodating the bus bars and a wiring path in which the wiring material is provided; a cover having a trunk line protection portion for protecting the trunk line and a plurality of branch protection portions for protecting the branch lines; a hinge portion that connects the cover and the case body via the branch protection portion; a locking portion that locks the cover to the case body; A busbar module having:

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