Battery pack

Abstract

Battery pack characterized by the fact that it comprises: a battery box body; a battery module arranged within the battery box body; and a cable harness protection element that is arranged in the battery box body and has a cable tray, wherein at least part of the cable harness of the battery pack is configured to be received in the cable tray and to run along a direction of travel of the cable tray.

Description

REFERENCE TO A RELATED REGISTRATION

[0001] This application claims priority from the Chinese patent application filed with the Chinese Patent Office on June 21, 2023, under application number 202321605070.0, entitled "Battery Pack". The entire content of that application is incorporated into the present application by reference. AREA OF TECHNOLOGY

[0002] The present application relates to the technical field of batteries, in particular a battery pack. STATE OF THE ART

[0003] In related technologies, the traction battery packs of new energy vehicles have limited space and contain a multitude of electronic and electrical components. This can cause the wiring harness within the battery pack to come into contact with surrounding components, resulting in abrasion. Currently, the common method to protect the wiring harness is to wrap it with a textile tape or self-winding sleeve. However, when the vehicle is in motion, the wiring harness can move, and due to the relatively soft material, the textile tape or self-winding sleeve is unable to completely prevent the problem of the wiring harness being damaged by contact and abrasion with surrounding components. Furthermore, this approach does not solve the problem of the wiring harness becoming disorganized when the vehicle is in motion. SUMMARY OF THE REGISTRATION

[0004] The present application aims to solve at least one of the technical problems inherent in related technologies. Accordingly, one objective of the present application is to provide a battery pack that can effectively protect its internal wiring harness, thus solving the problem of the wiring harness being damaged by contact and abrasion with surrounding components. Furthermore, it can guide and confine a portion of the wiring harness, thereby resolving, to some extent, the problem of the wiring harness becoming disordered.

[0005] According to one embodiment of the present application, a battery pack is provided comprising: a battery box body; a battery module arranged in the battery box body; and a cable harness protection element arranged in the battery box body and having a cable tray, wherein at least a part of the cable harness of the battery pack is configured to be received in the cable tray and to run along a direction of travel of the cable tray.

[0006] In the battery pack according to the embodiment of the present application, the cable harness protection element serves to insulate the cable harness from the components in the battery box body in order to prevent direct contact between the surrounding components and the cable harness, thus solving the problem of the cable harness being damaged by contact and abrasion with surrounding components. The cable channel of the cable harness protection element serves to guide and confine the cable harness, thus solving the problem of a portion of the cable harness becoming disordered within the battery pack.

[0007] According to some embodiments of the present application, the cable harness protection element is a plastic element; and the cable harness protection element is an element made of engineering plastic.

[0008] According to some embodiments of the present application, the cable harness protection element comprises a protection element body, wherein the protection element body has the cable tray and the protection element body is U-shaped or arc-shaped in cross-section.

[0009] According to some embodiments of the present application, the cable harness protective element comprises a protective element body and a reinforcing rib, wherein the protective element body has the cable channel and the reinforcing rib is arranged on an outer wall of the protective element body; and a plurality of reinforcing ribs are provided and arranged at intervals from one another along a longitudinal direction of the protective element body and the reinforcing ribs are configured to extend along a circumferential direction of the protective element body.

[0010] According to some embodiments of the present application, the cable harness protective element is provided with a plurality of through-holes, and a fastening element is configured to pass through the through-holes in order to secure the cable harness in the cable tray; the plurality of through-holes is subdivided into a plurality of through-hole groups, and the plurality of through-hole groups are arranged at intervals along a longitudinal direction of the cable tray, each through-hole group comprising two through-holes spaced apart along a lateral direction of the cable tray, the fastening element being configured to pass through two through-holes of each through-hole group in order to secure the cable harness in the cable tray.

[0011] According to some embodiments of the present application, the battery module comprises a module housing and a plurality of battery cells arranged in the module housing; the module housing is equipped with an output electrode socket, and an output electrode of the battery module is arranged on the output electrode socket, and the output electrode sockets of at least some of the battery modules are connected to the cable harness protection element.

[0012] According to some embodiments of the present application, at least a part of the output electrode base, which is connected to the cable harness protection element, is formed integrally with the cable harness protection element by injection molding; the output electrode base comprises a metal frame and an insulating layer, wherein the insulating layer is a plastic layer, the insulating layer is formed integrally with the cable harness protection element by injection molding, and the insulating layer is formed integrally with the metal frame by injection molding.

[0013] According to some embodiments of the present application, a dividing bar is provided in the battery box to divide the battery box into a plurality of module recesses, wherein the number of module recesses corresponds to the number of battery modules and there is a one-to-one correspondence, wherein the battery modules are arranged in the corresponding module recesses and the cable harness protection element is arranged on the top of the dividing bar and engages with the dividing bar.

[0014] According to some embodiments of the present application, a snap lock is arranged on the underside of the cable harness protection element, a locking opening is arranged on the top side of the divider bar, and the snap lock engages with the locking opening.

[0015] According to some embodiments of the present application, the division beam comprises a first division beam and a second division beam, wherein a plurality of first division beams are arranged intervalwise along a first direction, wherein the first division beams are configured to extend along a second direction, wherein the second division beam is configured to extend along the first direction and intersect with each of the first division beams, wherein the cable harness protection element is arranged on the top side of the second division beam and extends along the first direction; wherein a recess is formed on the top side of at least one of the first division beams, and wherein the output electrode base of the battery module is arranged in the recess.

[0016] Further aspects and advantages of the present application are partly set out in the following description and partly are obvious from the description or can be experienced through practical implementation of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or further aspects of the present application become apparent from the description of the embodiments and are easier to understand when considered in conjunction with the accompanying drawings, wherein: Fig. 1 a schematic representation of a cable harness protection element in a battery pack according to some embodiments of the present application in the assembled state; Fig. 2 a schematic representation of the cable harness protection element and part of the output electrode base in Fig. 1 is; Fig. 3 a top view of Fig. 2 is; Fig. 4 a front view of Fig. 2 is. Reference symbol:

[0018] 100. Cable harness protection element; 10. Protective element body; 11. Reinforcing rib; 12. Cable tray; 13. Through-hole group; 14. Through-hole; 15. Snap lock; 20. Output electrode base; 21. Insulating layer; 22. Connection stiffener; 101. Battery box body; 102. Dividing rail; 102a. First dividing rail; 102b. Second dividing rail; 103. Module recess; 104. Recess. DETAILED DESCRIPTION OF THE EXECUTION FORMS

[0019] Embodiments of the present application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout the document denote the same or similar elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are examples and serve solely to illustrate the present application and are not to be construed as limiting the present application.

[0020] The battery pack according to an embodiment of the present application is described below with reference to the Fig. 1-4 described.

[0021] Referring to the Fig. According to the embodiment of the present application, the battery pack comprises: a battery box body 101, a battery module, and a cable harness protection element 100. The battery module is arranged in the battery box body 101, and the cable harness protection element 100 is arranged in the battery box body 101 and is formed with a cable channel 12. At least a portion of the battery pack's cable harness is configured to be received in the cable channel 12 and to run along the direction of travel of the cable channel 12.

[0022] The cable harness protection element 100 is located in the battery box body 101, and the cable harness is arranged in the cable tray 12 of the cable harness protection element 100. Surrounding components of the cable harness protection element 100 cannot come into direct contact with the cable harness in the cable tray 12, thus enabling the cable harness protection element 100 to insulate the cable harness from the surrounding components. This solves the problem of the cable harness being damaged by contact and abrasion with surrounding components. The cable harness in the cable tray 12 runs along a defined path within the cable tray 12. In this way, the cable harness protection element 100 can guide and confine the cable harness, thus solving the problem of a portion of the cable harness within the battery pack becoming disordered.

[0023] At least part of the cable bundle is accommodated in the cable tray 12 and runs along the direction of travel of the cable tray 12. For example, part of the cable bundle can be accommodated in the cable tray 12 and run along the direction of travel of the cable tray 12, or the entire cable bundle is accommodated in the cable tray 12 and runs along the direction of travel of the cable tray 12.

[0024] In the battery pack according to the embodiment of the present application, the cable harness protection element 100 isolates the cable harness from the components in the battery box body 101 to prevent direct contact between the cable harness and the surrounding components, thus solving the problem of the cable harness being damaged by contact and abrasion with surrounding components. The cable channel 12 of the cable harness protection element 100 guides and confines the cable harness, thus solving the problem of a portion of the cable harness becoming disordered within the battery pack.

[0025] Referring to the Fig. According to some embodiments of the present application, the cable harness protection element 100 is a plastic element. The plastic element is lightweight, which reduces the overall weight of the cable harness protection element 100 and consequently the weight of the entire battery pack. This, in turn, satisfies the weight-related design requirements of the battery pack to a certain extent and reduces costs. The plastic element has good insulating properties, which fulfills the requirements for the insulating protection of the cable harness protection element 100 for the cable harness. Furthermore, the plastic element has low hardness, so that the cable harness protection element 100 can protect the cable harness while preventing damage to other components in contact with it due to excessive hardness.

[0026] The cable harness protection element 100 is optionally available in an engineering plastic version. This version offers a lighter weight, good insulation, moderate hardness, higher structural strength, and improved wear resistance, thus extending the service life of the cable harness protection element 100.

[0027] Optionally, the cable harness protection element 100 is a PA66 element made of technical plastic.

[0028] Referring to the Fig. 2 and Fig. According to some embodiments of the present application, the cable harness protective element 100 comprises a protective element body 10, wherein the protective element body 10 is formed with a cable channel 12 and the protective element body 10 has a U-shaped or arc-shaped cross-section. The U-shaped or arc-shaped structure is simple, which simplifies manufacturing. Furthermore, the cable channel 12 in the U-shaped or arc-shaped cable harness protective element 100 has a smoother overall structure, which can better protect the cable harness in the cable channel 12.

[0029] Referring to the Fig. According to some embodiments of the present application, the cable harness protective element 100 comprises a protective element body 10 and a reinforcing rib 11. The protective element body 10 is formed with the cable tray 12. The reinforcing rib 11 is arranged on an outer wall of the protective element body 10. The reinforcing ribs 11 can improve the overall structural strength of the cable harness protective element 100, which increases its service life. Since the reinforcing rib 11 is arranged on the outer wall of the protective element body 10 and not within the cable tray 12, the overall structure of the cable harness protective element 100 is improved without affecting the routing of the cable harness within the cable tray 12.

[0030] Referring to the Fig. 2-4 A plurality of reinforcing ribs 11 are arranged at intervals along a longitudinal direction of the protective element body 10, and the reinforcing ribs 11 are configured to extend along a circumferential direction of the protective element body 10. The reinforcing ribs 11 extending along a circumferential direction of the protective element body 10 strengthen the structural circumferential strength of the protective element body 10. A plurality of reinforcing ribs 11 are arranged along the length of the protective element body 10, further strengthening the structural strength along the longitudinal direction of the protective element body 10, thereby improving the overall structural strength of the protective element body 10.

[0031] It should be noted that “a multitude of” in the present application means two or more.

[0032] For example, with reference to the Fig. 2-4, eighteen reinforcing ribs 11 are provided along the body of the protective element 10, which significantly improves the structural strength of the protective element body 10 and extends the service life of the cable harness protective element 100.

[0033] Referring to the Fig. According to some embodiments of the present application, the cable harness protection element 100 is configured with a plurality of through-holes 14. A fastening element is configured to pass through the through-holes 14 in order to secure the cable harness in the cable tray 12. The cable tray 12 serves to guide and confine the cable harness within it. The fastening element secures the cable harness in the cable tray 12 through the through-holes 14, thus securing the cable harness within the cable tray 12. The plurality of through-holes 14 can secure a plurality of parts of the cable harness, ensuring the fastening effect of the cable harness and preventing it from becoming unstable due to movement.

[0034] For example, with regard to the Fig. 2 and Fig. 4, the number of through holes 14, which are arranged along the longitudinal direction of the cable tray 12, fourteen. This allows the cable bundle to be fastened in different positions, which prevents instability of the cable bundle position due to insufficient fastening points, thus ensuring the fastening effect of the cable bundle.

[0035] Referring to the Fig. 2 and Fig. In Figure 4, the plurality of through-holes 14 are subdivided into a plurality of through-hole groups 13. The plurality of through-hole groups 13 are arranged at intervals along the longitudinal direction of the cable tray 12. Each through-hole group 13 comprises two through-holes 14 spaced apart along a lateral direction of the cable tray 12. A fastener is configured to pass through the two through-holes 14 in each through-hole group to secure the cable string in the cable tray 12. The cable tray 12 and the cable string located at the position of the through-hole group 13 are secured by the two through-holes 14 of the through-hole group 13.For example, after the fastening element is attached to the outer circumference of the cable harness, it passes through a through-hole 14 from the cable tray 12 and then through another through-hole 14 into the cable tray 12, connecting the cable harness to the cable tray 12 and securing the cable harness. The cable harness is thus fully secured at the location of the through-hole group 13. The multiple through-hole groups 13 can secure multiple sections of the cable harness, ensuring an overall securing effect for the entire harness.

[0036] For example, with regard to the Fig. 2 and Fig. 4, the number of through holes 14, arranged along the longitudinal direction of the cable tray 12, is fourteen, and the number of through hole groups 13 is seven. This allows the cable string to be fastened at seven different positions, preventing instability in the cable string position due to insufficient fastening points, thus ensuring effective fastening of the cable string.

[0037] Optionally, a cable tie can be used as a fastening element to simplify the fastening of the cable harness.

[0038] Referring to the Fig. 1, Fig. 2 and Fig. 4. According to some embodiments of the present application, the battery module comprises a module housing and a plurality of battery cells arranged in the module housing. An output electrode socket is provided on the module housing, and the output electrodes of the battery module are arranged on the output electrode socket. The output electrode sockets of at least some of the battery modules are connected to the cable harness protection element 100. The output electrode socket 20 provides insulating protection for the output electrodes, and the output electrodes of the battery module can be attached to the module housing via the output electrode socket 20 located on the module housing. The output electrode socket 20, which is connected to the cable harness protection element 100, is arranged in the battery box body 101 together with the cable harness protection element 100.The cable harness protection element 100 can position the output electrode base 20, which is connected to its structure. Therefore, the output electrode base 20, connected to the cable harness protection element 100, not only provides insulating protection for the output electrodes, but also ensures a more stable position of the output electrode base 20, preventing instability in the position of the output electrode base 20 from affecting the arrangement of the output electrodes.

[0039] The output electrode sockets 20 of at least some of the battery modules are connected to the cable harness protection element 100. For example, all output electrode sockets 20 of some of the battery modules may be connected to the cable harness protection element 100; all output electrode sockets 20 of all battery modules may be connected to the cable harness protection element 100; some output electrode sockets 20 of some of the battery modules may be connected to the cable harness protection element 100; or some of the output electrode sockets 20 of all battery modules may be connected to the cable harness protection element 100.

[0040] Referring to the Fig. 1, Fig. 2 and Fig. 4 The output electrode socket, which is connected to the cable harness guard 100, is connected to the cable harness guard 100 via a connection stiffener 22. The connection stiffener 22 improves the connection strength between the cable harness guard 100 and the output electrode socket 20, which ensures the positioning of the output electrode socket 20 by the cable harness guard 100 and prevents any instability in the position of the output electrode socket 20 from affecting the arrangement of the output electrodes.

[0041] Referring to the Fig. 2 and Fig. 4. According to some embodiments of the present application, at least a part of the output electrode base connected to the cable harness guard 100 is formed in one piece by injection molding with the cable harness guard 100. A one-piece injection molded design improves the overall structural strength of the cable harness guard 100 and the output electrode base 20 connected to the cable harness guard 100, thus increasing the service life of the cable harness guard 100. Furthermore, it ensures the connection between the cable harness guard 100 and the output electrode base 20, guaranteeing the fastening effect of the cable harness guard 100 to the output electrode base 20 and preventing instability in the position of the output electrode base 20 from affecting the arrangement of the output electrodes.Furthermore, one-piece injection-molded elements deliver better injection molding results and require fewer components for assembly, which can improve the manufacturing efficiency of the cable harness protection element 100 and the output electrode base 20, which is connected to the cable harness protection element 100, to a certain extent.

[0042] At least part of the output electrode base 20, which is connected to the cable harness protection element 100, is formed in one piece with the cable harness protection element 100 by injection molding. For example, it could be a substructure of the output electrode base 20 that is formed in one piece with the cable harness protection element 100 by injection molding, or it could be the entire structure of the output electrode base 20 that is formed in one piece with the cable harness protection element 100 by injection molding.

[0043] Referring to the Fig. 2 and Fig. 4. The output electrode socket comprises a metal frame and an insulating layer 21. The insulating layer 21 is a plastic layer and is injection-molded in one piece with the cable harness guard 100, and the insulating layer 21 is injection-molded in one piece onto the metal frame. The insulating layer 21 of the output electrode socket 20 provides insulating protection for the output electrodes. The insulating layer 21 and the cable harness guard 100 are injection-molded in one piece, resulting in high overall structural strength, improved injection molding performance, and fewer components in the assembly. This improves, to a certain extent, the manufacturing efficiency of the cable harness guard 100 and the output electrode socket 20. The metal frame further improves the structural strength of the output electrode socket 20 and increases its service life.

[0044] Referring to Fig. 1. According to some embodiments of the present application, the battery box body 101 has a dividing bar 102 to subdivide the battery box body 101 into a plurality of module recesses 103. The number of module recesses 103 is the same as the number of battery modules, with a one-to-one correspondence. The battery modules are arranged in the associated module recesses 103. The cable harness guard 100 is located on the top of the dividing bar 102 and engages with the dividing bar 102. The dividing bar 102 improves the overall structural strength of the battery box body 101, thereby increasing its service life. Furthermore, the dividing bar 102 subdivides the battery box body 101 into a plurality of module recesses 103.The battery modules are housed in these module recesses 103 and these module recesses 103 serve to limit and protect the battery modules arranged therein, which prevents the battery modules from colliding with each other during vehicle operation due to vibration, thus increasing the safety of the battery modules.

[0045] The cable harness protection element 100 is located on the top of the divider bar 102, thus fully utilizing the space at the top of the divider bar 102 to improve space utilization inside the battery pack. The cable harness protection element 100 engages with the divider bar 102, which simplifies the installation and removal of the cable harness protection element 100.

[0046] For example, with reference to Fig. 1. Three partition rails 102 are present. These three partition rails 102 divide the battery box body 101 into four module recesses 103, and four battery modules can be accommodated in the four module recesses 103. Each of the four module recesses 103 fulfills a limiting and protective function for the internal battery module located within it, thus improving the safety of the battery module. The cable harness protection element 100 engages the top of one of the partition rails 102, thereby fully utilizing the space at the top of the partition rail 102 and improving the space utilization inside the battery pack.

[0047] Referring to Fig. 1. According to some embodiments of the present application, a snap lock 15 is arranged on the underside of the cable harness guard 100, and a locking opening is arranged on the upper side of the divider bar 102. The snap lock 15 is configured to engage in the locking opening. The cable harness guard 100 is secured by the snap lock 15 engaging with the locking opening on the upper side of the divider bar 102, thus achieving the fastening of the cable harness guard 100. This arrangement simplifies the installation and removal of the cable harness guard 100.

[0048] Referring to Fig. 1. According to some embodiments of the present application, the division rail 102 comprises a first division rail 102a and a second division rail 102b. A plurality of first division rails 102a are arranged at intervals along a first direction. The first division rails 102a extend along a second direction (see direction e2 in Fig. 1) The second dividing beam 102b runs along the first direction (see direction e1 in Fig.1) and intersects with each of the first dividing spars 102a. The cable harness protection element 100 is arranged on the top of the dividing spar 102b and extends along the first direction. At least one first dividing spar 102a is formed with a recess 104 on its top side, and the output electrode of the battery module is arranged in the recess 104. The first dividing spar 102a and the second dividing spar 102b improve the overall structural strength of the battery box body 101. In addition, the first dividing spar 102a and the second dividing spar 102b divide the interior of the battery box body 101 into a plurality of module recesses 103, and the first dividing spar 102a and the second dividing spar 102b confine and protect the battery modules in the module recesses 103.

[0049] The cable harness protection element 100 is located on the top of the second divider 102b, thus fully utilizing the space at the top of the divider 102b and improving space utilization inside the battery pack. At least one first divider 102a is formed with a recess 104 on its top surface, which allows the output electrode socket 20 to be secured in the recess 104. This simplifies the installation and securing of the output electrode socket 20, and the recess 104 can also reduce the weight of the first divider 102a to some extent. Furthermore, the recess 104 and the cable harness protection element 100 serve to position the output electrode socket 20, preventing the arrangement of the output electrodes from being affected by an unstable position of the socket.

[0050] In the description of this specification, terms such as "embodiment," "specific embodiment," and "example" indicate that a specific feature, structure, material, or property described in connection with that embodiment or example is included in at least one embodiment or example of the present application. In the present disclosure, illustrative expressions of the foregoing terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or properties may be combined in any suitable manner in one or more embodiments or examples.

[0051] Even though embodiments of the present application have been shown and described, those skilled in the art understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the claims and their equivalents. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 202321605070.0

[0001]

Claims

[1] Battery pack, characterized by , that it includes: a battery box body; a battery module arranged within the battery box body; and a cable harness protection element that is arranged in the battery box body and has a cable tray, wherein at least part of the cable harness of the battery pack is configured to be received in the cable tray and to run along a direction of travel of the cable tray. [2] Battery pack according to claim 1, characterized by , that the cable harness protection element is a plastic element; that the cable harness protection element is an element made of technical plastic. [3] Battery pack according to claim 1, characterized by that the cable harness protection element includes a protection element body, the protection element body has over the cable tray and the protection element body is U-shaped or arc-shaped in cross-section. [4] Battery pack according to claim 1, characterized by, that the cable harness protection element comprises a protection element body and a reinforcing rib, the protection element body has a cable tray and the reinforcing rib is arranged on an outer wall of the protection element body; and a plurality of reinforcing ribs are provided and spaced apart from each other along a longitudinal direction of the protection element body and the reinforcing ribs are configured to run along a circumferential direction of the protection element body. [5] Battery pack according to claim 1, characterized by, that the cable harness protection element is provided with a plurality of through-holes, and a fastening element is configured to pass through the through-holes to secure the cable harness in the cable tray; the plurality of through-holes is divided into a plurality of through-hole groups, and the plurality of through-hole groups are arranged at intervals along a longitudinal direction of the cable tray, each through-hole group comprising two through-holes spaced apart along a transverse direction of the cable tray, the fastening element is configured to pass through two through-holes of each through-hole group to secure the cable harness in the cable tray. [6] Battery pack according to claim 1, characterized by, that the battery module comprises a module housing and a plurality of battery cells arranged in the module housing, the module housing is equipped with an output electrode socket, and an output electrode of the battery module is arranged on the output electrode socket, and output electrode sockets of at least some of the battery modules are connected to the cable harness protection element. [7] Battery pack according to claim 6, characterized by , that at least part of the output electrode base connected to the cable harness protection element is formed in one piece by injection molding with the cable harness protection element; the output electrode base comprises a metal frame and an insulating layer, the insulating layer is a plastic layer, the insulating layer is formed in one piece by injection molding with the cable harness protection element, and the insulating layer is formed in one piece by injection molding onto the metal frame. [8] Battery pack according to claim 1, characterized by , that a dividing bar is provided in the battery box to divide the battery box into a plurality of module recesses, that the number of module recesses corresponds to the number of battery modules and there is a one-to-one correspondence, that the battery modules are arranged in the corresponding module recesses, and that the cable harness protection element is arranged on the top of the dividing bar and engages with the dividing bar. [9] Battery pack according to claim 8, characterized by , that a snap lock is arranged on the underside of the cable harness protection element, a locking opening is arranged on the top of the divider bar, and the snap lock engages with the locking opening. [10] Battery pack according to claim 8, characterized by, that the divider bar comprises a first divider bar and a second divider bar, a plurality of first divider bars are arranged intervalwise along a first direction, the first divider bars are configured to run along a second direction, the second divider bar is configured to run along the first direction and intersect with each of the first divider bars, the cable harness protection element is arranged on the top of the second divider bar and runs along the first direction; a recess is formed on the top of at least one of the first divider bars, and the output electrode base of the battery module is arranged in the recess.

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