Battery assembly structure

Abstract

A battery assembly structure according to the present disclosure is provided with: a battery box having a housing part for housing a battery pack; a battery cover which has a wall part covering the accommodating part and is provided with an opening part penetrating through the wall part; a connector disposed on an outer surface side of the wall portion; and a bus bar disposed on the inner surface side of the wall portion for electrically connecting the connector to a terminal disposed in the battery pack, the opening portion being disposed such that the positions of the bus bar and the terminal can be visually recognized from the outer surface side of the wall portion through the opening portion when the battery cover is fitted to the battery box in such a manner that the accommodating portion is covered by the wall portion.

Description

Technical Field

[0001] This disclosure relates to battery assembly structures. Background Technology

[0002] Vehicles such as electric vehicles and hybrid vehicles are equipped with an electric motor as a drive source and a battery as a power source for the drive motor.

[0003] The battery assembly structure includes, for example, a battery box, a battery cover, a connector, and a busbar. The battery box has a receiving portion for accommodating a battery pack. The battery pack has multiple battery modules. The receiving portion is open to the front. The battery cover has a wall. After the battery pack is received into the receiving portion, the battery cover is assembled to the battery box such that the wall covers the receiving portion from the front. The battery connector is disposed on the outer surface of the wall. The busbar extends along the inner surface of the wall and is electrically connected to the battery connector. Terminals are disposed in the battery pack. The busbar is electrically connected to and fixed to the terminals. Additionally, a power harness extending from the battery modules is electrically connected to and fixed to the terminals. According to the above structure, the battery connector is electrically connected to the battery modules via the busbar, terminals, and power harness. It should be noted that the battery connector is electrically connected to the vehicle-side connector. The vehicle-side connector is electrically connected to the motor side via the power harness.

[0004] For example, Patent Document 1 describes a battery pack comprising: a lower battery module formed by stacking multiple battery cells; an upper battery module formed by stacking multiple battery cells; a plate portion located between the upper battery module and the lower battery module; a first conductive portion electrically connected to the lower battery module; a second conductive portion electrically connected to the upper battery module; and a connecting portion electrically connecting the first conductive portion and the second conductive portion. In this battery pack, the plate portion has an opening extending through in the vertical direction, and when viewed from above, the connecting portion is located inside the opening.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2021-044228 Summary of the Invention

[0008] The problem the invention aims to solve

[0009] However, in the aforementioned battery assembly structure, since the battery cover is assembled to the battery box by covering the receiving portion from the front side with the wall, the following problems exist: Because operators cannot visually discern the relative positional relationship between the busbars extending along the inner surface of the wall and the terminals disposed in the battery pack, it becomes difficult to perform the wiring operation (connecting the busbars to the terminals). Furthermore, if wiring is performed under conditions that are not adequately met, the busbars and terminals may interfere with and damage each other.

[0010] Furthermore, in the battery pack described in Patent Document 1, since the opening extends through in the vertical direction, it is difficult to visually identify the relative positional relationship between the busbar extending along the inner surface of the wall and the terminals disposed in the battery pack through the opening. It cannot be said that the conditions for wiring operations are fully met, and it is not easy to perform the connection operation of electrically connecting the busbar and the terminals.

[0011] The purpose of this disclosure is to provide a battery assembly structure that enables easy connection operations to electrically connect the busbar to the terminals.

[0012] Solution to the problem

[0013] To achieve the above objectives, the battery assembly structure disclosed herein includes:

[0014] A battery case, having a housing for accommodating a battery pack;

[0015] The battery cover has a wall portion that covers the receiving portion and has an opening that penetrates the wall portion;

[0016] Connector, disposed on the outer surface side of the wall portion; and

[0017] A busbar, disposed on the inner surface of the wall, is used to electrically connect the connector to terminals disposed on the battery pack.

[0018] The opening is configured such that, when the battery cover is assembled to the battery case such that the receiving portion is covered by the wall portion, the positions of the busbar and the terminals can be visually identified from the outer surface side of the wall portion through the opening.

[0019] Invention Effects

[0020] According to this disclosure, it is possible to easily perform connection operations to electrically connect the busbar to the terminals. Attached Figure Description

[0021] Figure 1 This is a front view of the battery assembly structure according to an embodiment of this disclosure;

[0022] Figure 2 This is an exploded perspective view of the battery assembly structure according to an embodiment of the present disclosure;

[0023] Figure 3 This is an exploded perspective view of the battery assembly structure according to an embodiment of the present disclosure;

[0024] Figure 4 This diagram shows the busbar and terminals that can be visually identified through the openings in embodiments of this disclosure.

[0025] Figure 5 This is a diagram showing the busbar, terminals, and fasteners that can be visually identified through the openings in embodiments of this disclosure;

[0026] Figure 6 This is a perspective view showing the busbar, terminals, and fasteners according to embodiments of the present disclosure.

[0027] Explanation of reference numerals in the attached figures

[0028] HNA: Electrical wiring harness;

[0029] HNB: Power harness;

[0030] 2: Battery pack;

[0031] 3A: Terminal;

[0032] 3B: Terminal;

[0033] 4A: Terminal block;

[0034] 4B: Terminal block;

[0035] 30: Battery box;

[0036] 32: Reception area;

[0037] 34: Bottom wall;

[0038] 36: Both side walls;

[0039] 36A: Side wall portion;

[0040] 36B: Side wall portion;

[0041] 40: Battery cover;

[0042] 42: Back sidewall portion;

[0043] 44: Front side wall portion;

[0044] 44a: Front panel;

[0045] 45: Opening;

[0046] 46: Upper sidewall portion;

[0047] 50: Battery connector;

[0048] 60A: Busbar;

[0049] 60B: Busbar;

[0050] 62A: Chimeric part;

[0051] 62B: Chimeric part;

[0052] 100: Assembly structure. Detailed Implementation

[0053] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. The vehicle described in the embodiments of the present disclosure is a commercial electric vehicle for goods delivery, etc., equipped with a frame structure, an electric motor, and a drive battery. However, the present disclosure is not limited to commercial electric vehicles and can also be applied to general electric vehicles. The drive battery is a battery used to supply power to the electric motor.

[0054] Figure 1 This is a front view of the battery assembly structure according to an embodiment of this disclosure. Figure 2 This is an exploded perspective view of the battery assembly structure according to an embodiment of the present disclosure. Figure 3 This is an exploded perspective view of the battery assembly structure according to an embodiment of the present disclosure. Figure 1 The BL, TL, and WL axes are depicted. In the following description, in... Figure 1 In this context, the depth direction is referred to as the BL direction, the inward direction as the back side or "+BL direction," and the near-forward direction as the front side or "-BL direction." Figure 1 In this context, the left and right directions are referred to as the width direction or TL direction, the right direction is referred to as one side of the width direction or "+TL direction", and the left direction is referred to as the other side of the width direction or "-TL direction". Additionally, in... Figure 1 In this context, the vertical direction is referred to as the height direction or WL direction, the upward direction is referred to as the upper side or "+WL direction", and the downward direction is referred to as the lower side or "-WL direction". It should be noted that the back side (+BL direction) and the front side (-BL direction) correspond to the "horizontal direction" of this disclosure.

[0055] like Figure 1 , Figure 2 and Figure 3 As shown, the battery assembly structure 100 of this disclosure includes: a battery case 30, a battery cover 40, a battery connector 50, and busbars 60A and 60B. Figure 1 In the image, a portion of the front side (-BL direction) of the battery cover 40 is shown, revealing the battery pack 2 and terminals 3A, 3B, etc., disposed on the front side of the battery pack 2. Figure 2The image shows the battery compartment 30, battery cover 40, and terminals 3A and 3B as viewed from a slightly forward angle. Figure 3 The battery compartment 30 and battery cover 40 are shown as viewed from a rear-facing angle. It should be noted that the battery connector 50 corresponds to the "connector" of this disclosure.

[0056] Battery pack 2 includes multiple battery modules (not shown), a power harness HNA, a battery notebook (HNB), a battery management unit (not shown), and a junction box (not shown). Each battery module contains multiple individual battery cells. The battery management unit manages battery thermal and charge / discharge operations. The power harness HNA is connected to one of the positive or negative terminals of the battery module via the junction box. The power harness HNB is connected to the other terminal of the battery module via the junction box.

[0057] Terminals 3A and 3B are arranged on the front side of the battery pack 2. For example, terminals 3A and 3B are each rod-shaped and threaded terminals with a threaded portion on the outer periphery of the rod. Terminal 3A is fixed to the battery pack 2 via terminal plate 4A. Terminal 3B is fixed to the battery pack 2 via terminal plate 4B.

[0058] Terminal 3A is positioned to protrude from the battery pack 2 toward the front side (-BL direction). Terminal 3A is electrically connected to the battery module via a power harness HNA. Busbar 60A (described later) is electrically connected to terminal 3A.

[0059] Terminal 3B is positioned to protrude from the battery pack 2 toward the front side (-BL direction). Terminal 3B is electrically connected to the battery module via the power harness HNB. Busbar 60B (described later) is electrically connected to terminal 3B.

[0060] (Battery Box 30)

[0061] The battery box 30 has a receiving portion 32 for accommodating the battery pack 2.

[0062] The battery case 30 has a bottom wall 34 and two side walls 36, with the battery pack 2 housed in the bottom wall 34. One of the side walls 36 is a side wall 36A that rises vertically upwards (in the +WL direction) from one end of the bottom wall 34 in the width direction. The other side wall 36 is a side wall 36B that rises vertically upwards (in the +WL direction) from the other end of the bottom wall 34 in the width direction. The battery case 30 does not have any walls other than the bottom wall 34 and the two side walls 36, namely, the front side (-BL direction), the back side (+BL direction), and the top side (+WL). Thus, the receiving part 32 is open to the front side, the back side, and the top side.

[0063] (Battery cover 40)

[0064] The battery cover 40 has a rear sidewall portion 42, a front sidewall portion 44, and an upper sidewall portion 46. When the battery cover 40 is assembled into the battery case 30, the receiving portion 32 (battery pack 2) is covered from the front side, the rear side, and the upper side. In the following description, the receiving portion 32 side of each of the rear sidewall portion 42, the front sidewall portion 44, and the upper sidewall portion 46 is referred to as the "inner surface side," and the side opposite to the inner surface side is referred to as the "outer surface side."

[0065] Specifically, when the battery cover 40 is assembled into the battery case 30, the rear sidewall 42 becomes a wall that covers the receiving portion 32 from the rear side (+BL direction). Therefore, the rear side (+BL direction) of the battery pack 2 cannot be visually identified from the outer surface of the rear sidewall 42. Furthermore, the front sidewall 44 becomes a wall that covers the receiving portion 32 from the front side (-BL direction). Therefore, the front side (-BL direction) of the battery pack 2 and the terminals 3A and 3B arranged on the front side of the battery pack 2 cannot be visually identified from the outer surface of the front sidewall 44. Additionally, the upper sidewall 46 becomes a wall that covers the receiving portion 32 from the upper side (+WL direction). Therefore, the upper side (+WL direction) of the battery pack 2 cannot be visually identified from the outer surface of the upper sidewall 46.

[0066] A front panel 44a is disposed in the center of the front sidewall portion 44. A generally rectangular opening 45 is disposed on the front panel 44a, extending from the rear side (+BL direction) to the front side (-BL direction). (See reference 44a). Figure 4 It is configured in the following positions: one end of busbar 60A (described later) is configured at the position of the end connected to terminal 3A and one end of busbar 60B (described later) is configured at the position of the end connected to terminal 3B.

[0067] (Battery connector 50)

[0068] Battery connector 50 is disposed on front panel 44a. Battery connector 50 is a connector for connecting conductors. Battery connector 50 is disposed above the opening 45 (in the +WL direction). It should be noted that battery connector 50 is electrically connected to the vehicle-side connector. The vehicle-side connector is electrically connected to the motor side via a power wiring harness (not shown).

[0069] (Busbars 60A, 60B)

[0070] Busbars 60A and 60B, which serve as conductors, are arranged along the inner surface of the front panel 44a.

[0071] Busbar 60A extends from the battery connector 50 side toward the terminal 3A side, electrically connecting the battery connector 50 to the terminal 3A. Thus, the battery connector 50 is connected to the battery module via busbar 60A, terminal 3A, and power harness HNA. One end of busbar 60A (the end connected to terminal 3A) has a mating portion 62A. The mating portion 62A is a recessed groove formed by the edge of busbar 60A extending upwards (in the +WL direction). The shape of the recessed groove (e.g., groove width, groove depth) is set according to the size of terminal 3A (e.g., the outer diameter of a rod). The mating portion 62A engages with terminal 3A from above. It should be noted that the recessed groove corresponds to the "recess" of this disclosure.

[0072] Busbar 60B extends from the battery connector 50 side toward the terminal 3B side, electrically connecting the battery connector 50 and the terminal 3B. Thus, the battery connector 50 is connected to the battery module via busbar 60B, terminal 3B, and power harness HNB. One end of busbar 60B (the end connected to terminal 3B) has a mating portion 62B. The mating portion 62B is a recessed groove formed by the edge of busbar 60B extending upwards (in the +WL direction). The recessed groove of busbar 60B is constructed in the same manner as the recessed groove of busbar 60A. That is, the shape of the recessed groove (e.g., groove width, groove depth) is set according to the size of terminal 3B (e.g., the outer diameter of a rod shape). The mating portion 62B engages with terminal 3A from above. It should be noted that the recessed groove corresponds to the "recess" of this disclosure.

[0073] (Position of the opening at 45 degrees)

[0074] Next, refer to Figure 4 , Figure 5 and Figure 6 The position of the opening 45 is explained. Figure 4 This diagram shows the busbar and terminals that can be visually identified through the openings in embodiments of this disclosure. Figure 5 This diagram shows the busbar, terminals, and fasteners that can be visually identified through the openings in embodiments of this disclosure. Figure 6 This is a perspective view showing the busbar, terminals, and fasteners according to embodiments of the present disclosure.

[0075] like Figure 4 , Figure 5 and Figure 6As shown, the opening 45 is positioned such that when the battery cover 40 is assembled to the battery case 30 such that the receiving portion 32 is covered from the front side (-BL direction) by the front sidewall portion 44 (front panel 44a), the positions of terminals 3A and 3B can be visually identified from the outer surface of the front sidewall portion 44 through the opening 45. It should be noted that, as described above, the opening 45 is positioned at one end of the busbar 60A (the end connected to terminal 3A) and at one end of the busbar 60B (the end connected to terminal 3B). Therefore, when the battery cover 40 is assembled to the battery case 30, the operator can visually identify the busbar 60A and terminal 3A through the opening 45, and can also visually identify the busbar 60B and terminal 3B. In other words, the opening 45 is positioned to house the busbars 60A, 60B and terminals 3A, 3B, and the opening 45 has a size that allows the busbars 60A, 60B and terminals 3A, 3B to be housed therein.

[0076] (Battery assembly process)

[0077] Next, the battery assembly process of this embodiment will be described. It should be noted that the battery assembly process includes a wiring operation, i.e., a connection operation, where terminal 3A is electrically connected to busbar 60A and terminal 3B is electrically connected to busbar 60B. Furthermore, during the battery assembly process, when the opening 45 is closed by a cover (not shown), the cover is removed from the opening 45 to open the opening 45 (see reference...). Figure 2 ).

[0078] First, the battery pack 2 is accommodated in the receiving part 32. The battery pack 2 is accommodated in the receiving part 32 from the upper side (+WL direction).

[0079] Next, the battery cover 40 is assembled to the battery case 30 such that the front side wall portion 44 (front panel 44a) covers the receiving portion 32 (battery pack 2) from the front side (-BL direction).

[0080] It should be noted that by attaching the battery cover 40 to the battery case 30, the rear side wall portion 42 covers the receiving portion 32 (battery pack 2) from the rear side (+BL direction). Additionally, the upper side wall portion 46 covers the receiving portion 32 (battery pack 2) from the upper side (+WL direction). Furthermore, by attaching the battery cover 40 to the battery case 30, the position of the opening 45 is opposite to the positions of the busbars 60A, 60B, and terminals 3A, 3B in the depth direction (BL direction). In other words, an operator can visually identify the busbars 60A, 60B, and terminals 3A, 3B from the outer surface of the front side wall portion 44 through the opening 45.

[0081] It should be noted that, when assembling the battery cover 40 into the battery box 30, the fitting portion 62A of the busbar 60A can be simultaneously fitted with the terminal 3A. Alternatively, the fitting portion 62B of the busbar 60B can be simultaneously fitted with the terminal 3B (see reference). Figure 4 In the battery assembly process of this embodiment, the fitting part 62A does not simultaneously engage with terminal 3A, but the fitting part 62A is located near terminal 3A. Similarly, the fitting part 62B does not simultaneously engage with terminal 3B, but the fitting part 62B is located near terminal 3B. Therefore, the operator can clearly confirm the correspondence (connection relationship) between the fitting part 62A and terminal 3A and the correspondence (connection relationship) between the fitting part 62B and terminal 3B.

[0082] Next, while visually identifying the terminal 3A and busbar 60A from the outer surface of the front sidewall portion 44 through the opening 45, the terminal 3A is electrically connected to the busbar 60A. Specifically, the fitting portion 62A is fitted onto the terminal 3A from above (+WL direction) (see reference). Figure 4 Terminal 3A is secured to busbar 60A using a nut that engages with the threaded portion. Furthermore, terminal 3B and busbar 60B are electrically connected while being visually identified from the outer surface of the front sidewall 44 through the opening 45. Specifically, the fitting portion 62B is fitted into terminal 3B from above (+WL direction) (see reference). Figure 4 Terminal 3B is fastened to busbar 60B using a fastener (nut) that engages with the threaded portion (see reference). Figure 5 and Figure 6 ).

[0083] Next, the opening 45 is closed using a cover (not shown).

[0084] Through the above steps, the battery assembly operation of this embodiment is completed. The wiring operation of electrically connecting terminal 3A to busbar 60A and terminal 3B to busbar 60B is also completed.

[0085] The battery assembly structure described above includes: a battery case 30 having a receiving portion 32 for accommodating a battery pack 2; a battery cover 40 having a front sidewall portion 44 covering the receiving portion 32 from the front side, and having an opening 45 extending from the front side (-BL direction) to the back side (+BL direction) through the front sidewall portion 44; and busbars 60A and 60B disposed on the inner surface of the front sidewall portion 44 and in a position that can be visually identified from the outer surface of the front sidewall portion 44 through the opening 45. In this battery assembly structure, the opening 45 is disposed such that when the battery cover 40 is assembled to the battery case 30 such that the receiving portion 32 is covered by the front sidewall portion 44 from the front side, the positions of the busbars 60A and 60B and the terminals 3A and 3B can be visually identified from the outer surface of the front sidewall portion 44 through the opening 45.

[0086] According to the above structure, when the battery cover 40 is assembled into the battery box 30, the operator can visually identify the busbar 60A and terminal 3A through the opening 45, and can also visually identify the busbar 60B and terminal 3B. Therefore, the wiring operation can be performed when the conditions required for the connection operation (wiring operation) of electrically connecting the busbar 60A to the terminal 3A and the connection operation (wiring operation) of electrically connecting the busbar 60B to the terminal 3B are fully met. Therefore, the wiring operation can be performed easily without causing mutual interference and damage between the busbar and the terminal.

[0087] Furthermore, in the battery assembly structure of the above embodiment, terminals 3A and 3B are arranged to protrude from the battery pack 2 toward the front side (-BL direction). This allows the operator to face terminals 3A and 3B directly through the opening 45, thus facilitating easier connection work (wiring work) to electrically connect busbar 60A to terminal 3A and to electrically connect busbar 60B to terminal 3B.

[0088] Furthermore, in the battery assembly structure of the above embodiment, the busbars 60A and 60B have concave grooves that are recessed upward (in the +WL direction) so that they can fit into the terminals 3A and 3B from above. Therefore, when the battery cover 40 is assembled into the battery box 30, the fitting portion 62A of the busbar 60A can be fitted with the terminal 3A simultaneously, and the fitting portion 62B of the busbar 60B can be fitted with the terminal 3B simultaneously. Moreover, even when the fitting portion 62A is not fitted with the terminal 3A at the same time, and the fitting portion 62B is not fitted with the terminal 3B at the same time, the fitting portion 62A is located near the terminal 3A, and the fitting portion 62B is located near the terminal 3B. Thus, the operator can clearly confirm the correspondence (connection relationship) between the fitting portion 62A and the terminal 3A, and the correspondence (connection relationship) between the fitting portion 62B and the terminal 3B. Therefore, the connection operation of electrically connecting the busbar 60A to the terminal 3A and the connection operation of electrically connecting the busbar 60B to the terminal 3B can be performed more easily.

[0089] Furthermore, the battery assembly method described in the above embodiment is a battery assembly method for assembling a battery case 30, a battery cover 40, and busbars 60A and 60B. The battery case 30 has a receiving portion 32 for accommodating a battery pack 2; the battery cover 40 has a front side wall portion 44, and an opening 45 is provided on the front side wall portion 44; the busbars 60A and 60B are disposed on the inner surface side of the front side wall portion 44. The battery assembly method includes: a step of accommodating the battery pack 2 in the receiving portion 32; a step of assembling the battery cover 40 to the battery case 30 such that the front side wall portion 44 covers the receiving portion 32 from the front side; and a step of making electrical connections while visually identifying the terminals 3A and busbars 60A disposed on the battery pack 2 from the outer surface side of the front side wall portion 44 through the opening 45, and visually identifying the terminals 3B and busbars 60B disposed on the battery pack 2 from the outer surface side of the front side wall portion 44 through the opening 45. Therefore, when assembling the battery cover 40 into the battery box 30, the operator can visually identify the busbar 60A and terminal 3A through the opening 45, and can also visually identify the busbar 60B and terminal 3B. Thus, it is easy to perform the connection operation of electrically connecting the busbar 60A to the terminal 3A and the connection operation of electrically connecting the busbar 60B to the terminal 3B.

[0090] It should be noted that in the battery assembly structure of the above embodiment, when the battery pack 2 is housed in the housing portion 32, the housing direction of the battery pack 2 is set to the direction from the upper side (+WL direction) of the housing portion 32. Furthermore, when the battery cover 40 is assembled to the battery box 30, the assembly direction of the battery cover 40 is set to the direction of covering from the upper side of the housing portion 32. And, when the battery connector 50 is disposed on the battery cover 40, the placement location of the battery connector 50 is set to the front sidewall portion 44 (front panel 44a). However, in the battery assembly structure of this disclosure, the housing direction of the battery pack 2, the assembly direction of the battery cover 40, and the placement location of the battery connector 50 are not limited to these. For example, they can be appropriately changed according to the shape of the battery cover 40 (e.g., the opening direction of the housing portion 32), the placement location of the battery pack 2 relative to the vehicle, the vehicle structure, the specifications of the battery pack 2, etc.

[0091] Regarding the receiving direction of the battery pack 2 of this disclosure, for example, when the receiving portion 32 is open to the rear side (+BL direction), the battery pack 2 can also be received in the receiving portion 32 from the rear side. In this case, the battery cover 40 can also be assembled to the battery case 30 from the rear side of the receiving portion 32. Alternatively, for example, when the receiving portion 32 is open to the front side (-BL direction), the battery pack 2 can also be received in the receiving portion 32 from the front side. In this case, the battery cover 40 can also be assembled to the battery case 30 from the front side of the receiving portion 32. Alternatively, for example, when the receiving portion 32 is open to one side in the width direction (+TL direction), the battery pack 2 can also be received in the receiving portion from one side in the width direction. In this case, the battery cover 40 can also be assembled to the battery case 30 from one side in the width direction of the receiving portion 32. Alternatively, for example, when the receiving portion 32 is open to the other side in the width direction (-TL direction), the battery pack 2 can also be received in the receiving portion 32 from the other side in the width direction.

[0092] Furthermore, the configuration of the battery connector 50, busbar, terminals, opening 45, etc., disclosed herein can be appropriately modified according to the shape of the battery cover 40 (e.g., the opening direction of the receiving portion 32), the configuration of the battery pack 2 relative to the vehicle, the vehicle structure, and the specifications of the battery pack 2. Additionally, corresponding to the modification of the terminal configuration, the configuration of the power harness HNA and HNB used to electrically connect the terminals to the junction box is also modified. It is not necessary to specifically modify the battery pack 2 for these configuration changes. In other words, in the battery assembly structure of this disclosure, various types of battery assembly structures can be achieved by modifying the shape of the battery box 30, the shape of the battery cover 40, and the configuration of the battery connector 50, busbar, terminals, and openings, without modifying the battery pack 2.

[0093] Regarding the placement of the battery connector 50 of this disclosure, for example, the battery connector 50 may be placed on the back side wall of the battery cover, on one side wall in the width direction of the battery cover 40, or on the other side wall in the width direction. Corresponding to the change in the placement of the battery connector 50, the placement of the busbar, terminals, opening 45, etc., is also changed. For example, when the battery connector 50 is placed on one side wall in the width direction of the battery cover 40, the busbar is arranged along the inner surface of the side wall in the width direction. Additionally, the terminals are placed on one side of the battery pack in the width direction. The opening 45 is placed on one side wall in the width direction. Even in this case, the busbar and terminals are positioned so that they can be visually identified from the outer surface of the side wall in the width direction through the opening 45.

[0094] Furthermore, the above embodiments are merely specific examples of implementing this disclosure, and the technical scope of this disclosure should not be limited to these embodiments. That is, this disclosure can be implemented in various forms without departing from its essential points or main features.

[0095] Industrial applicability

[0096] This disclosure is suitable for use in vehicles with battery assembly structures that require easy connection operations to electrically connect the busbars to the terminals.

Claims

1. A battery assembly structure, characterized in that, have: A battery case, having a housing for accommodating a battery pack; The battery cover has a wall portion that covers the receiving portion and has an opening that penetrates the wall portion; Connector, disposed on the outer surface side of the wall portion; as well as A busbar, disposed on the inner surface of the wall, is used to electrically connect the connector to terminals disposed in the battery pack. The opening is configured such that, when the battery cover is assembled to the battery case such that the receiving portion is covered by the wall portion, the positions of the busbar and the terminals can be visually identified from the outer surface side of the wall portion through the opening.

2. The battery assembly structure as described in claim 1, The terminals are positioned to protrude from the battery pack.

3. The battery assembly structure as described in claim 1, The busbar has a recessed portion that is recessed upwards in a manner that allows it to engage with the terminal from above.

4. A battery assembly method for assembling a battery box, a battery cover, and a busbar, wherein the battery box has a receiving portion for accommodating a battery pack; the battery cover has a wall portion and an opening is provided in the wall portion; the busbar is disposed on the inner surface side of the wall portion, the battery assembly method being characterized by comprising: The step of accommodating the battery pack in the accommodating portion; The step of assembling the battery cover into the battery case such that the receiving portion is covered by the wall portion; as well as The step of visually identifying the terminals and the busbar disposed on the battery pack from the outer surface side of the wall through the opening, and electrically connecting the terminals to the busbar.

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