Battery pack

Abstract

The utility model provides a battery pack, and relates to the technical field of batteries, and the battery pack comprises a box body in which an accommodating space is formed; the liquid cooling plate is positioned in the accommodating space and is connected with the box body; the two cross beams are detachably connected with the two opposite sides of the liquid cooling plate respectively, and the upper surfaces of the two cross beams protrude out of the upper surface of the liquid cooling plate; and the bottoms of the battery modules are connected with the upper surface of the liquid cooling plate, and the battery modules are positioned between the two cross beams, so that when the cross beams are broken and the like, the cross beams can be directly detached from the liquid cooling plate, and the maintenance difficulty of the battery pack is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack. BACKGROUND

[0002] The battery pack comprises a box body, a liquid cooling plate and a battery module, the battery module and the liquid cooling plate are both located in the box body, and the liquid cooling plate is used for heat dissipation for the battery module.

[0003] Generally, the box body further comprises a cross beam, a side beam and a bottom guard plate, the side beam is welded on the bottom guard plate, and the cross beam is welded on the side beam, so that the cross beam, the side beam and the bottom guard plate cooperate to form a frame structure for supporting the battery module and the liquid cooling plate.

[0004] The cross beam needs to bear the expansion force generated by the expansion of the battery module, and is more likely to be damaged. When the cross beam is broken and other problems affecting use occur, it is difficult to disassemble the cross beam, resulting in a relatively large difficulty in maintaining the battery pack. CONTENT OF THE UTILITY MODEL

[0005] The present application provides a battery pack to achieve the effect of reducing the difficulty of maintaining the battery pack.

[0006] In one aspect, the present application provides a battery pack, comprising:

[0007] a box body, an internal accommodation space is formed;

[0008] a liquid cooling plate located in the accommodation space and connected with the box body;

[0009] two cross beams respectively and detachably connected with two opposite sides of the liquid cooling plate, and the upper surface of the cross beam protrudes from the upper surface of the liquid cooling plate;

[0010] a battery module, the bottom of which is connected with the upper surface of the liquid cooling plate, and the battery module is located between the two cross beams.

[0011] In some possible implementation manners, the liquid cooling plate and the cross beam are connected through at least two connecting assemblies.

[0012] In some possible implementation manners, at least two first mounting holes are arranged on the liquid cooling plate, the cross beam is located above the liquid cooling plate, and the cross beam is provided with second mounting holes corresponding to the first mounting holes one by one;

[0013] The connecting assembly comprises a connecting rod and two limit pieces, the connecting rod is inserted in the first mounting hole and the second mounting hole one by one, and the two ends of the connecting rod extend to the outside of the first mounting hole and the second mounting hole respectively, the limit pieces are respectively connected with the two ends of the connecting rod and correspondingly contact the surfaces of the liquid cooling plate and the cross beam.

[0014] In some possible embodiments, the box body comprises two oppositely arranged side beams, the extending direction of the side beams being perpendicular to the extending direction of the cross beams.

[0015] The opposite sides of the liquid cooling plate are detachably connected with the side beams in correspondence, and the side beams are arranged staggered with the cross beams.

[0016] In some possible embodiments, the liquid cooling plate is provided with a support beam at the bottom.

[0017] The box body further comprises a bottom guard plate, the side beams are arranged on the bottom guard plate, the liquid cooling plate is located above the bottom guard plate, and the bottom of the support beam is in contact with the upper surface of the bottom guard plate.

[0018] In some possible embodiments, the support beams are arranged in sequence and spaced apart along the extending direction of the side beams.

[0019] In some possible embodiments, the support beam comprises a support part and a positioning part arranged on the opposite sides of the support part, the support part is connected with the liquid cooling plate by bolts, and the lower surface of the positioning part is in contact with the upper surface of the bottom guard plate.

[0020] In some possible embodiments, further comprising an insulating end plate, the insulating end plate is located between the cross beam and the battery module and is in contact with the battery module, and the insulating end plate is filled with foam between the cross beam.

[0021] In some possible embodiments, further comprising:

[0022] A box cover is arranged outside the accommodating space and is connected with the box body.

[0023] An insulating tray is located between the battery module and the box cover and is connected with the battery module or the box body.

[0024] In some possible embodiments, the battery module comprises a plurality of electric cores arranged side by side, and an insulating spacer is arranged between adjacent electric cores.

[0025] The battery pack provided by the present application comprises a box body, a liquid cooling plate, a battery module and two cross beams, the liquid cooling plate is arranged in the accommodating space of the box body and is connected with the box body, the battery module is placed on the liquid cooling plate, and the two cross beams are detachably arranged on the opposite sides of the liquid cooling plate. Compared with the current method of welding the cross beam on the side beam, the cross beam is fixed on the liquid cooling plate in a detachable manner, so that when the cross beam cracks or the like, the cross beam can be directly detached from the liquid cooling plate, thereby effectively reducing the difficulty of detaching the cross beam and improving the convenience of maintaining the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the application and, together with the description, serve to explain the principles of the application.

[0027] Figure 1 A structural schematic diagram of a battery pack provided for an embodiment of the application;

[0028] Figure 2 A connection structure schematic diagram of a liquid cooling plate and a cross beam in a battery pack provided for an embodiment of the application;

[0029] Figure 3 A partial structural schematic diagram of a battery pack provided for an embodiment of the application;

[0030] Figure 4 A structural schematic diagram of an insulating end plate in a battery pack provided for an embodiment of the application;

[0031] Figure 5 A connection structure schematic diagram of an insulating tray and a battery module in a battery pack provided for an embodiment of the application;

[0032] Figure 6 A structure of an insulating tray in a battery pack provided for an embodiment of the application.

[0033] Explanation of reference signs:

[0034] 100 - box body;

[0035] 200 - liquid cooling plate;

[0036] 210 - limiting strip;

[0037] 220 - support beam;

[0038] 221 - support part;

[0039] 222 - positioning part;

[0040] 300 - cross beam;

[0041] 310 - connection assembly;

[0042] 400 - battery module;

[0043] 410 - battery cell;

[0044] 500 - insulating end plate;

[0045] 600 - box cover;

[0046] 700 - insulating tray;

[0047] 800 - insulating spacer.

[0048] The specific embodiments of the application have been shown by the above drawings, and will be described in more detail hereinafter. These drawings and the written description are not intended to restrict the scope of the inventive concept in any way, but to explain the inventive concept to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0049] In order to make the purposes, technical solutions and advantages of the application clearer, the technical solutions of the application will be described clearly and completely below in combination with the drawings in the application. Obviously, the described embodiments are some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0050] The terms "first", "second", "third", "fourth" and the like in the description and claims of the utility model and the above drawings (if any) are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein, for example, can be implemented in an order other than those illustrated or described herein.

[0051] In the embodiments of the application, the words "exemplary" or "for example" are used to mean example, illustration, or description. Any embodiment or design solution described as "exemplary" or "for example" in the application should not be interpreted as more preferred or more advantageous than other embodiments or design solutions. Rather, the use of "exemplary" or "for example" is intended to present relevant concepts in a concrete manner.

[0052] The CPT (Cell-to-Pack) scheme is a battery packaging technology aimed at improving the energy density and overall performance of battery packs. Traditional battery pack designs usually include multiple hierarchical structures, such as cells, modules, and packs. The CPT scheme directly integrates cells into the battery pack, eliminating the intermediate module level, thus simplifying the structural design and improving space utilization.

[0053] At present, in the CPT scheme, the cross beam is generally welded on the side beam of the box body, and the cross beam needs to bear the expansion force generated by the cell expansion, which leads to the cross beam being easily damaged. Once the cross beam cracks, it is difficult to disassemble the cross beam, increasing the difficulty of maintaining the battery pack.

[0054] In order to avoid the above problems, the battery pack provided by the embodiment of the present application installs the cross beams on the liquid cooling plate in a detachable manner, the battery module is placed on the liquid cooling plate and located between the two cross beams, and the position of the battery module is limited by the cross beams. When the cross beams are damaged due to the expansion of the battery module, the cross beams can be detached from the liquid cooling plate for quick maintenance and replacement, thereby effectively improving the convenience of maintenance of the battery pack compared with welding the cross beams on the side beams.

[0055] It can be understood that the battery pack provided by the embodiment of the present application can be applied to various electric equipment, including but not limited to electric vehicles, hybrid vehicles, electric buses and trucks, energy storage systems, unmanned aerial vehicles, electric tools, electric ships, aviation equipment, etc.

[0056] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can exist independently or in combination. For the same or similar concepts or processes, some embodiments may not be described again. The embodiments of the present application will be described below with reference to the drawings.

[0057] In some embodiments of the present application, as shown in Figure 1 and Figure 2 , the battery pack includes a box body 100, a liquid cooling plate 200, a battery module 400 and two cross beams 300.

[0058] The box body 100 forms an accommodating cavity inside, the liquid cooling plate 200 is located in the accommodating cavity and connected with the box body 100, and the battery module 400 is fixed on the liquid cooling plate 200, and the bottom of the battery module 400 is connected with the upper surface of the liquid cooling plate 200.

[0059] The battery module 400 generally includes a plurality of battery cells 410, which are connected in series or in parallel to meet the power demand of the electric equipment. The battery cells 410 can be common lithium ion batteries, lithium iron phosphate batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0060] The two cross beams 300 are detachably connected with the two opposite sides of the liquid cooling plate 200, the upper surface of the cross beam 300 protrudes outward from the upper surface of the liquid cooling plate 200, and the battery module 400 is located between the two cross beams 300, and the position of the battery module 400 is further limited by the cross beam 300.

[0061] The liquid cooling plate 200 can be fixed on the box body 100 by any means, such as bolt connection, welding or bonding, etc., as long as the liquid cooling plate 200 does not produce relative displacement with the box body 100 during use.

[0062] Of course, the limiting strip 210 can also be added on the liquid cooling plate 200, and the limiting strip 210 can be connected with the battery module 400, so as to improve the position limiting effect between the battery module 400 and the liquid cooling plate 200 and facilitate positioning assembly.

[0063] In addition, the liquid cooling plate 200 has a flow channel inside for the flow of refrigerant, and the side in contact with the battery module 400 is generally made of a heat-conducting material, so that the refrigerant entering the flow channel can exchange heat with the battery module 400. The structure and principle are well known to those skilled in the art, and will not be described here.

[0064] The battery module 400 can be fixed on the liquid cooling plate 200 through the heat-conducting structural adhesive, so as to effectively fix the battery module 400 on the liquid cooling plate 200, and not affect the heat exchange between the liquid cooling plate 200 and the battery module 400 during use of the battery module 400.

[0065] Compared with the current welding of the cross beam 300 on the side beam, the cross beam 300 is fixed on the liquid cooling plate 200 in a detachable manner, so that when the cross beam 300 cracks, the cross beam 300 can be directly detached from the liquid cooling plate 200, effectively reducing the difficulty of detaching the cross beam 300 and improving the convenience of battery pack maintenance.

[0066] In some embodiments of the present application, please refer to Figure 2 As shown in the figure, the liquid cooling plate 200 and the cross beam 300 are connected through at least two connecting assemblies 310.

[0067] Among them, the cross beam 300 has a certain length, if it is only connected through one connecting assembly 310, the cross beam 300 may be inclined when the battery expands, so the number of connecting assemblies 310 can be determined according to the length of the cross beam 300, but generally at least two connecting assemblies 310 are provided to avoid the inclination of the cross beam 300.

[0068] Exemplarily, the connecting assembly 310 can be a buckle, one part of the buckle is located on the liquid cooling plate 200, and the other part is located on the cross beam 300. After the two parts are buckled, the cross beam 300 can be fixed on the liquid cooling plate 200.

[0069] Exemplarily, the connecting assembly 310 includes a connecting rod and two limiting pieces.

[0070] At this time, the cross beam 300 is placed above the liquid cooling plate 200, the first mounting hole is arranged on the liquid cooling plate 200, the first mounting hole corresponds to the connecting rod one by one, the second mounting hole corresponding to the first mounting hole is arranged on the cross beam 300, the connecting rod is correspondingly arranged in the first mounting hole and the second mounting hole, and both ends extend to the outside of the first mounting hole and the second mounting hole, respectively, and the limiting piece is correspondingly connected with both ends of the connecting rod and contacts the surface of the liquid cooling plate 200 and the cross beam 300, so as to lock the liquid cooling plate 200 and the cross beam 300 through the limiting piece.

[0071] Of course, according to the assembly requirement, one or more spacers can also be selected between the liquid cooling plate 200 and the cross beam 300, the position of the cross beam 300 is adjusted through the spacer, and a flexible spacer can also be selected to prevent rigid contact between the two.

[0072] The limiting piece can be a nut, and external threads are arranged on both ends of the connecting rod. After the connecting rod is inserted into the first mounting hole and the second mounting hole and the relative position of the liquid cooling plate 200 and the cross beam 300 in the horizontal direction is limited, the limiting piece is connected to the outside of the connecting rod in a threaded connection manner from both ends. At this time, the limiting piece can limit the relative position of the liquid cooling plate 200 and the cross beam 300 in the vertical direction.

[0073] Of course, a plurality of second mounting holes can also be arranged in sequence along the extension direction of the cross beam 300, so as to connect the cross beam 300 and the liquid cooling plate 200 through a plurality of connecting rods. While facilitating the disassembly of the cross beam 300, the connection strength of the liquid cooling plate 200 and the cross beam 300 can be effectively improved.

[0074] It can be understood that the above is only an example of the structure of the connecting assembly 310, and is not a limitation. Other components that can realize the detachable connection between the cross beam 300 and the liquid cooling plate 200 can also be applied herein.

[0075] In some embodiments of the application, the box body 100 includes two oppositely arranged side beams, the extension direction of the side beam is perpendicular to the extension direction of the cross beam 300, and the side beam is correspondingly detachably connected with the two opposite sides of the liquid cooling plate 200.

[0076] Specifically, the box body 100 further includes a bottom guard plate, the side beam is arranged on the bottom guard plate and fixedly connected with the bottom guard plate. During assembly, the liquid cooling plate 200 can be placed on the side beam, a plurality of holes are arranged on the corresponding side of the liquid cooling plate 200 and the side beam, and then the liquid cooling plate 200 is locked on the side beam through bolts, so that the liquid cooling plate 200 is located above the bottom guard plate, the distance between the bottom guard plate and the liquid cooling plate 200 is increased, and the battery module 400 located on the liquid cooling plate 200 can be better protected during bottom ball striking and bottom scraping.

[0077] Meanwhile, the liquid cooling plate 200 is detachably connected with the side beam, and the cross beam 300 is detachably connected with the liquid cooling plate 200, so that the problems of difficult maintenance and high maintenance cost of the existing CTP battery pack structure can be avoided, and the production and later maintenance cost of the battery pack can be effectively reduced.

[0078] Further, referring to Figure 3 As shown in the figure, in order to improve the strength of the liquid cooling plate 200, a support beam 220 is arranged at the bottom of the liquid cooling plate 200, the liquid cooling plate 200 is located above the bottom guard plate, and the bottom of the support beam 220 is in contact with the upper surface of the bottom guard plate.

[0079] Specifically, the support beam 220 can be arranged as one or more, and the specific arrangement can be made according to the support requirement of the liquid cooling plate 200. When multiple support beams 220 are arranged, the extension direction of the support beam 220 can be the same as the extension direction of the cross beam 300, and the multiple support beams 220 can be arranged in sequence along the extension direction of the side beam. Of course, the support beam 220 is located between the side beams and does not interfere with the side beams.

[0080] For example, the support beam 220 includes a support part 221 and a positioning part 222 arranged on the opposite sides of the support part 221, so as to form a structure similar to a few Chinese characters beam, the support part 221 is connected with the liquid cooling plate 200 through bolts, and the lower surface of the positioning part 222 is attached to the upper surface of the bottom guard plate.

[0081] The support beam 220 with such a structure can effectively improve the strength of the liquid cooling plate 200, so that the carrying capacity of the liquid cooling plate 200 is stronger, and the probability of deformation of the liquid cooling plate 200 is reduced.

[0082] It can be understood that the above is only an example of the structure of the support beam 220, as long as the support beam 220 can be located between the liquid cooling plate 200 and the bottom guard plate and in contact with the liquid cooling plate 200 and the bottom guard plate respectively, the support beam 220 can support the liquid cooling plate 200, and the present embodiment does not limit the same.

[0083] In some embodiments of the present application, referring to Figure 4 As shown in the figure, the battery pack further includes two insulating end plates 500, the insulating end plates 500 are located between the cross beam 300 and the battery module 400 and in contact with the battery module 400, and the cross beam 300 is filled with foam between the insulating end plates 500.

[0084] Specifically, the battery module 400 generally includes a plurality of battery cells 410, the battery cells 410 are arranged in sequence along the length direction of the side beam, and the insulating end plate 500 is located between the cross beam 300 and the battery cell 410 adjacent to the cross beam 300. The insulating end plate 500 is made of insulating material, which can isolate the cross beam 300 and the battery cell 410, and can have a good insulating effect, thereby improving the protection effect on the battery module 400.

[0085] The foam may have adhesive on one or both sides, and be connected to at least one of the insulating end plate 500 and the crossbeam 300 by adhesive, so that the foam can be stably positioned between the insulating end plate 500 and the crossbeam 300.

[0086] Foam is generally formed by introducing air bubbles or gas into a polymer matrix. It is a porous material with elasticity, such as polyurethane foam, polyethylene foam, and rubber foam. It is located between the insulating end plate 500 and the crossbeam 300. It can keep the insulating end plate 500 in contact with the battery module 400 through expansion force, thereby pressing the battery module 400 from both sides.

[0087] At the same time, when the battery module 400 expands after long-term use, it can also compress the foam, provide a certain expansion space, and keep the insulating end plate 500 in a state of pressing the battery module 400, thus effectively fixing the battery module 400.

[0088] In addition, the insulating end plate 500 can be made of common insulating materials, such as plastic, as long as its shape is compatible with the battery module 400, can restrict the position of the battery module 400, and has an insulating effect. This embodiment does not limit it.

[0089] For some embodiments of this application, please refer to Figure 1 , Figure 5 and Figure 6 As shown, the battery pack also includes a cover 600 and an insulating tray 700.

[0090] The cover 600 is connected to the body 100 to seal the storage space on the body 100. The specific connection method between the cover 600 and the body 100 can be determined according to the actual situation. For example, it can be connected by common methods such as bolts or snap-fits, as long as the cover 600 and the body 100 do not separate during the use of the battery pack.

[0091] In this case, the battery cell 410 needs to be connected through the electrode tab. If the insulating tray 700 will block the electrode tab, a clearance hole or groove can be opened at the corresponding position of the insulating tray 700 to allow the electrode tab to extend.

[0092] It is understood that the insulating tray 700 is made of any insulating material, such as a plastic blister tray, as long as it can restrict the position of the battery module 400 and provide insulation. This embodiment does not limit it.

[0093] The insulating tray 700 is arranged on the side of the battery module 400 away from the liquid cooling plate 200, and presses the battery module 400 on the liquid cooling plate 200 from the top of the battery module 400, so as to improve the fixing effect of the battery module 400. At the same time, the insulating tray 700 can also fix the battery cell 410, and can increase the creepage distance, so as to improve the use performance of the battery module 400.

[0094] In addition, the insulating tray 700 can be arranged on the insulating end plate 500, or can be connected or only contacted with the insulating end plate 500, and the embodiment is not limited thereto.

[0095] Further, for the battery module 400, the insulating spacer 800 can also be arranged between the adjacent battery cells 410, and the two sides of the insulating spacer 800 are correspondingly contacted with the two battery cells 410, so as to fill the gap between the two battery cells 410 and improve the fixing effect of the battery cell 410.

[0096] The insulating spacer 800 is made of common insulating material, and can be flexible or non-flexible, and the specific selection can be made according to actual use requirements, and the embodiment is not limited thereto.

[0097] Of course, the thickness of the insulating spacer 800 can also be determined according to actual use requirements, for example, 0.45 mm thick, as long as the insulating effect can be achieved and the battery cell 410 can be fixed.

[0098] In addition, the insulating spacer 800, the insulating end plate 500 and the insulating tray 700 cooperate to perform insulation treatment from each surface of the battery module 400, effectively increase the creepage distance, and improve the use performance of the battery module 400.

[0099] The embodiment of the application also provides a power utilization equipment, which comprises a device main body and the battery pack in the above embodiment.

[0100] The power utilization equipment includes but is not limited to electric vehicles, hybrid vehicles, electric buses and trucks, energy storage systems, unmanned aerial vehicles, electric tools, electric ships, aviation equipment and the like.

[0101] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The specification and examples given are considered exemplary only, and the true scope and spirit of the application is indicated by the following claims.

[0102] It is to be understood that the application is not limited to the precise construction already described above and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application should only be limited by the claims appended hereto.

Claims

1. A battery pack, characterized by, The application relates to a battery module cooling device. The battery module cooling device comprises a box (100) internally forming a containing space; a liquid cooling plate (200) located in the containing space and connected with the box (100); two cross beams (300) respectively detachably connected with two opposite sides of the liquid cooling plate (200), and the upper surface of the cross beam (300) is higher than the upper surface of the liquid cooling plate (200); and a battery module (400) with the bottom connected with the upper surface of the liquid cooling plate (200) and located between the two cross beams (300). The liquid cooling plate (200) and the cross beam (300) are connected through at least two connecting assemblies (310). The liquid cooling plate (200) is provided with at least two first mounting holes, the cross beam (300) is located above the liquid cooling plate (200), and the cross beam (300) is provided with second mounting holes corresponding to the first mounting holes one by one. The connecting assembly (310) comprises a connecting rod and two limiters, the connecting rod is inserted in the first mounting hole and the second mounting hole one by one, and the two ends of the connecting rod extend to the outside of the first mounting hole and the second mounting hole respectively, the limiters are connected with the two ends of the connecting rod respectively and are in contact with the surfaces of the liquid cooling plate (200) and the cross beam (300) respectively to limit the relative positions of the liquid cooling plate (200) and the cross beam (300).

2. The battery pack of claim 1, wherein, The box (100) comprises two opposite side beams, the extension direction of the side beam is perpendicular to the extension direction of the cross beam (300).

3. The battery pack of claim 2, wherein, The opposite sides of the liquid cooling plate (200) are detachably connected with the side beams correspondingly, and the side beams are staggered with the cross beams (300). The bottom of the liquid cooling plate (200) is provided with a support beam (220).

4. The battery pack of claim 1, wherein, The box (100) further comprises a bottom guard plate, the side beams are arranged on the bottom guard plate, the liquid cooling plate (200) is located above the bottom guard plate, and the bottom of the support beam (220) is in contact with the upper surface of the bottom guard plate. The support beam (220) is sequentially and spacedly provided with a plurality of support beams (220) along the extension direction of the side beam.

5. The battery pack of claim 4, wherein, The support beam (220) comprises a support part (221) and a positioning part (222) separately arranged on the opposite sides of the support part (221), the support part (221) is connected with the liquid cooling plate (200) through bolts, and the lower surface of the positioning part (222) is attached to the upper surface of the bottom guard plate. The application further comprises an insulating end plate (500) located between the cross beam (300) and the battery module (400) and in contact with the battery module (400), and the insulating end plate (500) is filled with foam between the cross beam (300).

6. The battery pack of claim 5, wherein, The application further comprises a box cover (600) arranged outside the containing space and connected with the box (100); and an insulating tray (700) located between the battery module (400) and the box cover (600) and connected with the battery module (400) or the box (100).

7. The battery pack of claim 5, wherein, ​ 8. The battery pack of any one of claims 1-7, wherein, ​ 9. The battery pack of claim 8, wherein, ​ ​ ​ 10. The battery pack of claim 9, wherein, The battery module (400) comprises a plurality of battery cells (410) arranged side by side, and an insulating spacer (800) is arranged between adjacent battery cells (410).

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