Battery pack shell, battery pack and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and provides a battery pack shell, a battery pack and electric equipment. The battery pack shell comprises a bottom plate, a side beam and a first reinforcing plate, the side beam is arranged on the peripheral side of the bottom plate in a surrounding mode, the side beam and the bottom plate are connected and define a containing cavity, the first reinforcing plate is located on the side, away from the containing cavity, of the bottom plate, and the orthographic projection of the first reinforcing plate on the bottom plate covers at least part of the connecting position of the bottom plate and the side beam; and the first reinforcing plate is connected with the side beam and / or the bottom plate. According to the battery pack shell provided by the invention, the probability of damage such as gaps or cracks at the joints of the bottom plate and the side beams is low.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack housing, a battery pack and an electrical device. Background Art

[0002] Battery packs are used to provide electrical energy to electric vehicles. As the voltage required by electric vehicles increases, the weight of the battery cell modules in the battery pack is also increasing.

[0003] Specifically, the battery pack includes a battery pack shell and a plurality of battery cell modules located in the battery pack shell, each battery cell module includes a plurality of battery cells, and the plurality of battery cells are arranged in sequence in the battery pack shell. The battery pack shell includes a bottom plate and a side beam, and the bottom plate and the side beam can be connected by welding or other fixing methods. As the weight of the battery cell module increases, the strength requirements for the battery pack shell are getting higher and higher.

[0004] In the related art, gaps or cracks are easily formed at the connection between the bottom plate and the side beam of the battery pack shell, thereby reducing the strength of the battery shell. Utility Model Content

[0005] The present application provides a battery pack shell, a battery pack and an electrical device, wherein the probability of damage such as gaps or cracks occurring at the connection between the bottom plate and the side beam in the battery pack shell is relatively low.

[0006] The present application provides a battery pack shell, including a bottom plate, a side beam and a first reinforcing plate, wherein the side beam is arranged around the bottom plate, the side beam is connected to the bottom plate and forms a accommodating cavity together, the first reinforcing plate is located on the side of the bottom plate away from the accommodating cavity, and the orthographic projection of the first reinforcing plate on the bottom plate covers at least part of the connection between the bottom plate and the side beam; the first reinforcing plate is connected to the side beam and / or the bottom plate.

[0007] In a possible embodiment, the battery pack shell provided in the present application, the side beams include two first side beams arranged opposite to each other along a first direction and two second side beams arranged opposite to each other along a second direction, the size of the first side beam along the second direction is smaller than the size of the second side beam along the first direction, and the orthographic projection of the first reinforcement plate on the bottom plate covers at least part of the connection between the bottom plate and the first side beams.

[0008] In a possible embodiment, in the battery pack shell provided in the present application, the first reinforcement plate includes a first reinforcement portion and a second reinforcement portion, the orthographic projection of the first reinforcement portion on the bottom plate covers at least a portion of the connection between the bottom plate and the side beam, and the dimension of the first reinforcement portion along the thickness direction of the bottom plate is greater than the dimension of the second reinforcement portion along the thickness direction of the bottom plate.

[0009] In a possible implementation, the battery pack shell provided in the present application has a first cavity in the first reinforcement portion, and a second cavity in the second reinforcement portion, and the wall thickness of the first cavity is greater than the wall thickness of the second cavity.

[0010] In a possible implementation, in the battery pack shell provided in the present application, the wall thickness of the first cavity is 1.5 mm-2 mm, and / or the wall thickness of the second cavity is 0.8 mm-1.2 mm.

[0011] In a possible implementation, the battery pack shell provided in the present application further includes a first adhesive layer, the first adhesive layer is located between the first reinforcing plate and the bottom plate, and the first adhesive layer is used to bond the first reinforcing plate and the bottom plate.

[0012] In a possible embodiment, in the battery pack shell provided in the present application, the side beam includes a first welding area, and the bottom plate is welded to the first welding area; and / or, the side beam includes a second welding area, and the first reinforcing plate is welded to the second welding area.

[0013] In a possible embodiment, the battery pack shell provided in the present application also includes a second reinforcing plate, which is arranged in the middle area of the bottom plate along the first direction and is located on the side of the bottom plate away from the accommodating cavity, and the two ends of the second reinforcing plate are connected to the side beams, and the second reinforcing plate is connected to the bottom plate.

[0014] In a possible embodiment, in the battery pack shell provided by the present application, the middle beam is located in the accommodating cavity and is connected to the bottom plate, the middle beam and the second reinforcing plate are located on opposite sides of the bottom plate, the orthographic projection of the second reinforcing plate on the bottom plate covers at least part of the connection between the bottom plate and the middle beam, and the second reinforcing plate is used to support the connection between the bottom plate and the middle beam.

[0015] In a possible implementation, the battery pack shell provided in the present application further includes a second adhesive layer, the second adhesive layer is located between the second reinforcing plate and the bottom plate, and the second adhesive layer is used to bond the second reinforcing plate and the bottom plate.

[0016] In a possible implementation, in the battery pack shell provided in the present application, the bottom plate includes a third welding area, and the middle beam is welded to the third welding area.

[0017] In a possible embodiment, the battery pack shell provided in the present application, the bottom plate also includes a plurality of first connection parts, the third welding area includes a plurality of welding segments, the first connection parts and the welding segments are spaced apart along the extension direction of the middle beam; the second reinforcing plate has a through hole, and the first connection part is passed through the through hole.

[0018] In a possible embodiment, the battery pack shell provided in the present application has an exhaust hole on the bottom plate at a position between the adjacent welding section and the first connecting portion, two adjacent exhaust holes are symmetrically arranged along the first connecting portion, and the line connecting the two adjacent exhaust holes has an angle less than 90° with the extension direction of the middle beam.

[0019] In a possible implementation, in the battery pack housing provided in the present application, the middle beam includes a first beam segment and a second beam segment, and a gap is provided between the first beam segment and the second beam segment for the connector to pass through.

[0020] In a possible embodiment, in the battery pack shell provided in the present application, the middle beam also includes a mounting portion, the mounting portion is located between the first beam segment and the second beam segment and the mounting portion is detachably connected to the first beam segment and the second beam segment, the mounting portion is located in the gap, and the mounting portion is provided with an opening for the connecting member to pass through.

[0021] In a possible implementation, the bottom plate of the battery pack housing provided in the present application is a liquid cooling plate.

[0022] The present application also provides a battery pack, comprising a battery cell module and the above-mentioned battery pack shell, wherein the battery cell module is located in the battery pack shell.

[0023] In a possible embodiment, the battery pack provided in the present application further includes a connecting member, there are at least two battery cell modules, and the at least two battery cell modules are located on opposite sides of the middle beam of the battery pack shell. The connecting member is inserted into the opening of the middle beam of the battery pack shell for electrically connecting the at least two battery cell modules.

[0024] The present application also provides an electrical device comprising at least one of the above-mentioned battery packs.

[0025] The battery pack shell provided in the present application is provided with a bottom plate, a side beam and a first reinforcing plate. The side beam is arranged around the circumference of the bottom plate, and the side beam is connected to the bottom plate and enclosed with the bottom plate to form a accommodating cavity. The first reinforcing plate is located on the side of the bottom plate away from the accommodating cavity, and the orthographic projection of the first reinforcing plate on the bottom plate covers at least part of the connection between the bottom plate and the side beam. The first reinforcing plate is connected to the side beam and / or the bottom plate, and the first reinforcing plate is used to support the connection between the bottom plate and the side beam. Part of the external force borne at the connection between the bottom plate and the side beam can be transmitted to the first reinforcing plate, thereby reducing the external force borne at the connection between the bottom plate and the side beam, so as to reduce the risk of damage to the connection between the bottom plate and the side beam, thereby increasing the strength of the battery pack shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic diagram of the structure of a battery pack housing provided in an embodiment of the present application;

[0028] Figure 2 Structure schematic diagram of another angle of Figure 1 ;

[0029] Figure 3 Is Figure 2 Explosion schematic diagram of

[0030] Figure 4 Connection schematic diagram of the middle bottom plate, side beam and first reinforcement plate in the battery pack housing provided by the embodiment of the present application;

[0031] Figure 5 Is along Figure 2 Cross-sectional view of the A-A plane in

[0032] Figure 6 Is Figure 5 Enlarged view at B in Figure 1 ;

[0033] Figure 7 Is Figure 5 Enlarged view at B in Figure 2 ;

[0034] Figure 8 Is Figure 7 Enlarged view at C in

[0035] Figure 9 Another structure schematic diagram of the battery pack housing provided by the embodiment of the present application;

[0036] Figure 10 Is Figure 9 Structure schematic diagram of another angle of

[0037] Figure 11 Is Figure 10 Explosion schematic diagram of

[0038] Figure 12 Connection schematic diagram of the middle bottom plate, side beam, first reinforcement plate and second reinforcement plate in the battery pack housing provided by the embodiment of the present application;

[0039] Figure 13 Is along Figure 10 Cross-sectional view of the D-D plane in

[0040] Figure 14 Is Figure 13 Enlarged view at E in

[0041] Figure 15 Explosion schematic diagram of the intermediate beam, bottom plate and second connecting plate in the battery pack housing provided by the embodiment of the present application;

[0042] Figure 16 Is Figure 15 View of another angle of

[0043] Figure 17 Schematic diagram of the connection between the bottom plate and the middle beam of the battery pack housing provided by the embodiment of the present application;

[0044] Figure 18 Partial schematic diagram of the bottom plate of the battery pack housing provided by the embodiment of the present application;

[0045] Figure 19 Schematic diagram of the structure of the bottom plate and the middle beam of the battery pack housing provided by the embodiment of the present application;

[0046] Figure 20 Schematic diagram of the structure of the middle beam in the battery pack housing provided by the embodiment of the present application;

[0047] Figure 21 is Figure 20 explosion schematic diagram of

[0048] Figure 22 Schematic diagram of the structure of the battery pack provided by the embodiment of the present application.

[0049] Explanation of reference numerals:

[0050] 100 - Battery pack housing;

[0051] 110 - Bottom plate; 111 - Flow channel; 112 - Protrusion; 113 - Third welding area; 1131 - Welding section; 114 - First connection part; 115 - Exhaust hole; 116 - Exhaust hole pair;

[0052] 120 - Side beam; 120a - First side beam; 120b - Second side beam; 121 - First welding area; 122 - Second welding area; 123 - Extension part;

[0053] 130 - First reinforcing plate;

[0054] 131 - First reinforcing part; 1311 - First cavity; 1312 - First outer wall;

[0055] 132 - Second reinforcing part; 1321 - Second cavity; 1322 - Second outer wall; 1323 - Reinforcing rib;

[0056] 133 - First adhesive layer;

[0057] 140 - Second reinforcing plate; 141 - Through hole; 142 - Second adhesive layer;

[0058] 150 - Intermediate beam; 151 - First beam segment; 152 - Second beam segment; 153 - Opening; 154 - Mounting part; 1541 - Mounting part body; 1541a - First mounting hole; 1542 - First mounting block; 1542a - First wedge block; 1542b - Second mounting hole; 1543 - Second mounting block; 1543a - Second wedge block; 1543b - Third mounting hole; 1544 - Fastener;

[0059] 200 - Battery cell;

[0060] 300 - Connecting piece;

[0061] 1000 - Battery pack;

[0062] 160 - Accommodating cavity; 161 - First accommodating cavity; 162 - Second accommodating cavity;

[0063] H1 - First thickness;

[0064] H2 - Second thickness;

[0065] H3 - First wall thickness;

[0066] H4 - Second wall thickness;

[0067] X - First direction;

[0068] Y - Second direction;

[0069] Z - Third direction. Detailed implementation manners

[0070] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0071] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "mount", "connect", and "couple" should be construed broadly. For example, it may be a fixed connection, or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0072] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0073] The terms "first", "second", "third" (if any) in the description and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and do not necessarily 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 present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0074] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or maintenance tool comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or maintenance tools.

[0075] The battery pack is used to provide electrical energy for an electric vehicle. As the voltage required by the electric vehicle increases, the weight of the battery cell modules in the battery pack also becomes higher and higher.

[0076] Specifically, the battery pack includes a battery pack housing and a plurality of battery cell modules located in the battery pack housing. Each battery cell module includes a plurality of battery cells, and the plurality of battery cells are arranged in sequence in the battery pack housing. As the voltage required by the electric vehicle increases, the number and weight of the battery cells in the battery pack also become larger and larger.

[0077] The battery pack housing includes a bottom plate and side plates, and the bottom plate and side plates can be connected by welding or other fixing means. As the weight of the battery cell modules increases, the strength requirements for the battery pack housing become higher and higher. The connection between the bottom plate and the side plates is a region with relatively low strength. When the battery pack is subjected to external forces such as vibration, gaps, cracks and other damages may occur at the connection between the bottom plate and the side plates due to the external forces, thereby reducing the strength of the battery pack housing.

[0078] Based on this, the present application provides a battery pack housing, a battery pack and an electrical equipment, and the probability of damage such as gaps or cracks occurring at the connection between the bottom plate and the side beam in the battery pack housing is relatively small.

[0079] Figure 1 It is a schematic structural diagram of the battery pack housing provided by the embodiment of the present application. Figure 2 For Figure 1Structural schematic diagram from another angle, Figure 3 is Figure 2 explosion schematic diagram of, Figure 4 Connection schematic diagram of the bottom plate, side beam and first reinforcing plate in the battery pack housing provided in the embodiment of the present application.

[0080] Refer to Figures 1 to 4 As shown, the battery pack housing 100 provided in the embodiment of the present application includes a bottom plate 110, a side beam 120 and a first reinforcing plate 130. The side beam 120 surrounds the periphery of the bottom plate 110. The side beam 120 is connected to the bottom plate 110 and encloses to form a receiving cavity 160. The first reinforcing plate 130 is located on the side of the bottom plate 110 facing away from the receiving cavity 160. The orthographic projection of the first reinforcing plate 130 on the bottom plate 110 covers at least a part of the connection between the bottom plate 110 and the side beam 120. The first reinforcing plate 130 is connected to the side beam 120 and / or the bottom plate 110.

[0081] The battery pack housing 100 can be a flat cuboid, cube, or frustum of a cone. In Figures 1 to 3 the shown embodiment, the battery pack housing 100 is a flat cuboid. The battery pack housing 100 includes a first direction X, a second direction Y and a third direction Z. Among them, the third direction Z can be the thickness direction of the battery pack housing 100.

[0082] The battery pack housing 100 includes a bottom plate 110 and a side beam 120 surrounding the periphery of the bottom plate 110. The side beam 120 and the bottom plate 110 form a receiving cavity 160, and the battery cell module can be placed in the receiving cavity 160. The bottom plate 110 bears the weight of the battery cell module, and the side beam 120 is used to protect the side of the battery cell module.

[0083] Among them, the bottom plate 110 can be made of a metal with a relatively high thermal conductivity, or the bottom plate 110 can be a liquid cooling plate. The bottom plate 110 has a plurality of flow channels 111, and there is a flowing cooling medium in the flow channels 111. As the cooling medium flows in the flow channels 111, the heat generated by the battery cells in the battery pack housing 100 can be taken away. The battery pack housing 100 may further include an upper cover (not marked in the figure), and the upper cover and the bottom plate 110 are located at opposite ends along the third direction Z.

[0084] The side beam 120 can be connected to the periphery of the bottom plate 110 through fasteners, and the side beam 120 can also be welded to the periphery of the bottom plate 110.

[0085] Specifically, please continue to refer to Figure 4 As shown, the dotted line frame represents the side beam 120, the solid line frame represents the bottom plate 110, and the overlapping area between the four edges of the bottom plate 110 and the side beam 120 is the connection between the bottom plate 110 and the side beam 120.

[0086] The strength of the connection between the bottom plate 110 and the side beam 120 is relatively small. When the battery pack housing 100 is subjected to external forces such as vibration, gaps, cracks and other damages will appear at the connection between the bottom plate 110 and the side beam 120 due to the external forces, thereby reducing the strength of the battery pack housing 100.

[0087] In the embodiment of the present application, by providing the first reinforcing plate 130, the external force borne by the connection between the bottom plate 110 and the side beam 120 can be reduced. Thus, the strength of the battery pack housing 100 can be increased. In Figure 4 it, the first reinforcing plate 130 is represented by a slanted filled box.

[0088] Specifically, please continue to refer to Figure 2 and Figure 3 As shown, the first reinforcing plate 130 can be provided on the side of the bottom plate 110 facing away from the accommodation cavity 160. Thus, the first reinforcing plate 130 does not occupy the space in the accommodation cavity 160. Since the thickness of the side beam 120 is usually relatively large, the first reinforcing plate 130 can also be connected to the side beam 120. The first reinforcing plate 130 can be connected to the side beam 120 by fasteners, and the first reinforcing plate 130 can also be welded to the side beam 120. A part of the first reinforcing plate 130 can be in contact with the surface of the bottom plate 110 facing away from the accommodation cavity 160, and a part of the first reinforcing plate 130 is in contact with the side beam 120. Thus, the orthographic projection of the first reinforcing plate 130 on the bottom plate 110 covers a part of the connection between the bottom plate 110 and the side beam 120, and the first reinforcing plate 130 can support the connection between the bottom plate 110 and the side beam 120.

[0089] When the battery pack housing 100 is subjected to external forces, a part of the external force borne by the connection between the bottom plate 110 and the side beam 120 can be transmitted to the first reinforcing plate 130. That is to say, the first reinforcing plate 130 can share the external force at the connection between the bottom plate 110 and the side beam 120. Thus, the external force borne by the connection between the bottom plate 110 and the side beam 120 can be reduced, and the risk of damage at the connection between the bottom plate 110 and the side beam 120 can be reduced.

[0090] In Figure 2 it Figure 4 only two first reinforcing plates 130 are shown. In other embodiments, first reinforcing plates 130 can be provided at the four edges of the bottom plate 110.

[0091] The battery pack housing 100 provided in the embodiment of the present application is provided with a bottom plate 110, a side beam 120 and a first reinforcing plate 130. The side beam 120 is arranged around the circumference of the bottom plate 110, and the side beam 120 is connected to the bottom plate 110 and encloses to form a receiving cavity 160. The first reinforcing plate 130 is located on the side of the bottom plate 110 away from the receiving cavity 160, and the orthographic projection of the first reinforcing plate 130 on the bottom plate 110 covers at least part of the connection between the bottom plate 110 and the side beam 120. The first reinforcing plate 130 is connected to the side beam 120 and / or the bottom plate 110, and the first reinforcing plate 130 is used to support the connection between the bottom plate 110 and the side beam 120. Part of the external force borne at the connection between the bottom plate 110 and the side beam 120 can be transmitted to the first reinforcing plate 130, thereby reducing the external force borne at the connection between the bottom plate 110 and the side beam 120, thereby reducing the risk of damage to the connection between the bottom plate 110 and the side beam 120, thereby increasing the strength of the battery pack shell 100.

[0092] Please continue to see Figures 1 to 4 As shown, the side beam 120 includes two first side beams 120a arranged opposite to each other along a first direction X and two second side beams 120b arranged opposite to each other along a second direction Y. The size of the first side beam 120a along the second direction Y is smaller than the size of the second side beam 120b along the first direction X. The orthographic projection of the first reinforcing plate 130 on the bottom plate 110 covers at least a portion of the connection between the bottom plate 110 and the first side beam 120a.

[0093] The battery pack shell 100 is a flat rectangular structure. The size of the bottom plate 110 along the first direction X is greater than the size of the bottom plate 110 along the second direction Y. The two side beams 120 located at both ends of the bottom plate 110 along the first direction X are first side beams 120a, and the two side beams 120 located at both ends of the bottom plate 110 along the second direction Y are second side beams 120b. Therefore, the length of the first side beam 120a is less than the length of the second side beam 120b.

[0094] When the battery pack shell 100 is subjected to external force, the force averagely distributed to the connection between the first side beam 120a and the bottom plate 110 along the second direction Y is larger, and the force averagely distributed to the connection between the second side beam 120b and the bottom plate 110 along the first direction X is smaller. Therefore, a first reinforcing plate 130 can be provided at the connection between the first side beam 120a and the bottom plate 110, so that the orthographic projection of the first reinforcing plate 130 on the bottom plate 110 covers the connection between the bottom plate 110 and the first side beam 120a, so as to support the connection between the bottom plate 110 and the first side beam 120a, thereby reducing the external force borne at the connection between the bottom plate 110 and the first side beam 120a.

[0095] Figure 5 For along Figure 2 The cross-sectional view of the AA surface. Figure 6 for Figure 5Magnification at B in Figure 1 。

[0096] See Figure 5 and Figure 6 As shown, the first reinforcing plate 130 includes a first reinforcing portion 131 and a second reinforcing portion 132. The orthographic projection of the first reinforcing portion 131 on the bottom plate 110 covers at least part of the connection between the bottom plate 110 and the side beam 120. The dimension of the first reinforcing portion 131 in the thickness direction of the bottom plate 110 is greater than the dimension of the second reinforcing portion 132 in the thickness direction of the bottom plate 110.

[0097] The part of the first reinforcing plate 130 covering the connection between the bottom plate 110 and the side beam 120 is the first reinforcing portion 131, and the part of the first reinforcing plate 130 covering other positions of the bottom plate 110 is the second reinforcing portion 132. The dimension of the first reinforcing portion 131 in the thickness direction (the third direction Z) is the first thickness H1, and the dimension of the second reinforcing portion 132 in the thickness direction is the second thickness H2. The first thickness H1 is greater than the second thickness H2. Thus, the first reinforcing portion 131 can bear a greater external force. There is no welding seam or connection structure at the position covered by the second reinforcing portion 132. Therefore, the second thickness H2 can be less than the first thickness H1. Thus, the weight of the first reinforcing plate 130 itself can be reduced.

[0098] Figure 7 For Figure 5 magnification at B in Figure 2 。

[0099] See Figure 7 As shown, the first reinforcing portion 131 has a first cavity 1311 therein, and the second reinforcing portion 132 has a second cavity 1321 therein. The wall thickness of the first cavity 1311 is greater than the wall thickness of the second cavity 1321.

[0100] The first cavity 1311 can be provided in the first reinforcing portion 131 to make the first reinforcing portion 131 a hollow structure. Thus, the weight of the first reinforcing portion 131 can be reduced without reducing its strength. The second cavity 1321 can be provided in the second reinforcing portion 132 to make the second reinforcing portion 132 a hollow structure. Thus, the weight of the second reinforcing portion 132 can be reduced without reducing its strength. Thus, the weight of the first reinforcing plate 130 can be further reduced. In Figure 7 , since the dimension of the second reinforcing portion 132 in the first direction X is relatively large, a plurality of reinforcing ribs 1323 can be provided in the second cavity 1321.

[0101] The outer wall of the first cavity 1311 is the first outer wall 1312, and the outer wall of the second cavity 1321 is the second outer wall 1322. The wall thickness of the first outer wall 1312 is the first wall thickness H3, and the wall thickness of the second outer wall 1322 is the second wall thickness H4. The first wall thickness H3 is greater than the second wall thickness H4. Thus, the strength of the first reinforcing portion 131 is still greater than the strength of the second reinforcing portion 132.

[0102] In some embodiments, the wall thickness of the first cavity 1311 is 1.5 mm - 2 mm, and / or the wall thickness of the second cavity 1321 is 0.8 mm - 1.2 mm.

[0103] When the first wall thickness H3 is set to be relatively small, the strength of the first reinforcing portion 131 is small. When the first wall thickness H3 is set to be relatively large, the dimension of the first reinforcing portion 131 along the third direction Z will be large and the weight of the first reinforcing portion 131 will be large. In addition, tests show that as the first wall thickness H3 continues to increase, the damage at the connection between the bottom plate 110 and the side beam 120 will not be further reduced. Therefore, the first wall thickness H3 does not need to be set too large. The first wall thickness H3 is usually set in the range of 1.5 mm - 2 mm.

[0104] When the second wall thickness H4 is set to be relatively small, the strength of the second reinforcing portion 132 is small. When the second wall thickness H4 is set to be relatively large, the dimension of the second reinforcing portion 132 along the third direction Z will be large and the weight of the second reinforcing portion 132 will be large. The second wall thickness H4 is usually set in the range of 0.8 mm - 1.2 mm.

[0105] Figure 8 For Figure 7 The enlarged view at position C in

[0106] See Figure 8 As shown, the battery pack housing 100 further includes a first adhesive layer 133. The first adhesive layer 133 is located between the first reinforcing plate 130 and the bottom plate 110, and the first adhesive layer 133 is used to bond the first reinforcing plate 130 and the bottom plate 110.

[0107] The first reinforcing plate 130 can be in contact with the bottom plate 110 to better support the connection between the bottom plate 110 and the side beam 120. In a possible embodiment, a first adhesive layer 133 can also be provided between the first reinforcing plate 130 and the bottom plate 110. One side of the first adhesive layer 133 is bonded to the first reinforcing plate 130, and the other side of the first adhesive layer 133 is bonded to the bottom plate 110. By providing the first adhesive layer 133, the force at the connection between the bottom plate 110 and the side beam 120 can be transmitted to the first reinforcing plate 130 faster.

[0108] In Figures 6 to 8In the illustrated embodiment, since the bottom plate 110 is a liquid cooling plate and the flow channel 111 in the liquid cooling plate forms a protrusion 112 on the side of the bottom plate 110 facing the first reinforcing plate 130, therefore, at the position with the protrusion 112, the first adhesive layer 133 is located between the protrusion 112 and the first reinforcing plate 130. Additionally, it can be seen that no flow channel is provided at the bottom plate 110 opposite to the first reinforcing portion 131. Thus, the part where the thickness of the first reinforcing portion 131 is greater than that of the second reinforcing portion 132 just makes use of the size of the protrusion 112.

[0109] Please continue to refer to Figure 6 and Figure 7 As shown, the side beam 120 includes a first welding area 121, and the bottom plate 110 is welded to the first welding area 121; and / or, the side beam 120 includes a second welding area 122, and the first reinforcing plate 130 is welded to the second welding area 122.

[0110] The bottom plate 110 and the side beam 120 can be connected by welding. Compared with connection by fasteners, welding connection can eliminate the fasteners, making the structure of the battery pack housing 100 more compact. For example, the side beam 120 and the bottom plate 110 can be welded by friction stir welding.

[0111] Specifically, the first welding area 121 can face away from the accommodation cavity 160, and the edge of the bottom plate 110 covers the first welding area 121 to be welded to the first welding area 121.

[0112] The side beam 120 further includes an extension portion 123 extending from the bottom plate 110 away from the accommodation cavity 160. The second welding area 122 is provided on the extension portion 123, and the side wall of the first reinforcing plate 130 is welded to the second welding area 122. For example, the side wall of the first reinforcing plate 130 and the second welding area 122 can be welded by arc welding.

[0113] By providing the first welding area 121 and the second welding area 122, it is possible to avoid interference between the part where the bottom plate 110 is welded to the side beam 120 and the part where the first reinforcing plate 130 is welded to the side beam 120.

[0114] Figure 9 This is another schematic structural view of the battery pack housing provided by the embodiment of the present application. Figure 10 is Figure 9 a schematic structural view from another angle of Figure 11 is Figure 10 an exploded view of Figure 12 This is a connection schematic view of the bottom plate, side beam, first reinforcing plate, and second reinforcing plate in the battery pack housing provided by the embodiment of the present application.

[0115] Refer to Figures 9 to 12As shown, the battery pack housing 100 further includes a second reinforcing plate 140. The second reinforcing plate 140 is disposed in the middle region of the bottom plate 110 and is located on the side of the bottom plate 110 facing away from the accommodation cavity 160. Both ends of the second reinforcing plate 140 are connected to the side beams 120, and the second reinforcing plate 140 is connected to the bottom plate 110.

[0116] Specifically, when the size of the battery pack housing 100 in the first direction X or the second direction Y is relatively large, the battery pack housing 100 is prone to deformation in the middle region. Therefore, the second reinforcing plate 140 can be disposed in the middle region of the bottom plate 110 along the first direction X or the second direction Y. The second reinforcing plate 140 can also be located on the side of the bottom plate 110 facing away from the accommodation cavity 160. In Figures 9 to 11 the illustrated embodiment, the size of the battery pack housing 100 in the first direction X is relatively large. Therefore, the second reinforcing plate 140 can be disposed in the middle region of the bottom plate 110 along the first direction X. The number of the second reinforcing plates 140 can be one or multiple. Multiple second reinforcing plates 140 can be spaced along the first direction X.

[0117] Both ends of the second reinforcing plate 140 along its extending direction can be connected to the side beams 120. In Figures 9 to 11 it, the second reinforcing plate 140 extends along the second direction Y, and both ends of the second reinforcing plate 140 along the second direction Y can be respectively connected to two second side beams 120b. Among them, Figure 12 in Figure 4 on the basis of adding the second reinforcing plate 140, the second reinforcing plate 140 is represented by a slanted filled box, and the overlapping area of the second reinforcing plate 140 and the second side beam 120b is the connection area between the second reinforcing plate 140 and the second side beam 120b.

[0118] The side of the second reinforcing plate 140 facing the bottom plate 110 is connected to the bottom plate 110, whereby the bottom plate 110 can be supported, and the deformation of the bottom plate 110 can be reduced.

[0119] Please continue to refer to Figure 9 as shown, the battery pack housing 100 further includes an intermediate beam 150. The intermediate beam 150 is located in the accommodation cavity 160 and is connected to the bottom plate 110. The intermediate beam 150 and the second reinforcing plate 140 are located on opposite sides of the bottom plate 110. The orthographic projection of the second reinforcing plate 140 on the bottom plate 110 covers at least a part of the connection between the bottom plate 110 and the intermediate beam 150. The second reinforcing plate 140 is used to support the connection between the bottom plate 110 and the intermediate beam 150.

[0120] The intermediate beam 150 can divide the accommodation cavity 160 into a first accommodation cavity 161 and a second accommodation cavity 162. One battery cell module or multiple battery cell modules can be disposed in each of the first accommodation cavity 161 and the second accommodation cavity 162.

[0121] Please continue to refer to Figure 12 As shown, the middle beam 150 is shown in a dashed box, and the connection between the bottom plate 110 and the middle beam 150 can have the same size as the middle beam 150.

[0122] The strength of the connection between the bottom plate 110 and the middle beam 150 is relatively small. When the battery pack housing 100 is subjected to external forces such as vibration, gaps, cracks and other damages will occur at the connection between the bottom plate 110 and the middle beam 150 due to the external force, thereby reducing the strength of the battery pack housing 100. In the embodiment of the present application, the second reinforcing plate 140 is disposed opposite to the middle beam 150 on both sides of the bottom plate 110. The second reinforcing plate 140 can be connected to the side of the bottom plate 110 facing away from the accommodation cavity 160. Thus, the orthographic projection of the second reinforcing plate 140 on the bottom plate 110 covers the connection between the bottom plate 110 and the middle beam 150, and can also reduce the external force borne by the connection between the bottom plate 110 and the middle beam 150. Therefore, the strength of the battery pack housing 100 can be increased.

[0123] Figure 13 For the sectional view along Figure 10 plane D-D in Figure 14 and Figure 13 is the enlarged view at position E in

[0124] Refer to Figure 13 and Figure 14 As shown, the battery pack housing 100 further includes a second adhesive layer 142. The second adhesive layer 142 is located between the second reinforcing plate 140 and the bottom plate 110, and the second adhesive layer 142 is used to bond the second reinforcing plate 140 and the bottom plate 110.

[0125] A second adhesive layer 142 can also be provided between the second reinforcing plate 140 and the bottom plate 110. One side of the second adhesive layer 142 is bonded to the second reinforcing plate 140, and the other side of the second adhesive layer 142 is bonded to the bottom plate 110. By providing the second adhesive layer 142, the force at the connection between the bottom plate 110 and the middle beam 150 can be transmitted to the second reinforcing plate 140 faster. In the embodiment shown in Figure 13 and Figure 14 the second adhesive layer 142 is located between the protrusion 112 and the second reinforcing plate 140.

[0126] Figure 15 is the exploded view of the middle beam, the bottom plate and the second connecting plate in the battery pack housing provided by the embodiment of the present application.

[0127] Refer to Figure 15 As shown, the bottom plate 110 includes a third welding area 113, and the middle beam 150 is welded to the third welding area 113.

[0128] The bottom plate 110 and the middle beam 150 can be connected by welding. Compared with connection by fasteners, welding connection can eliminate the fasteners, making the structure of the battery pack housing 100 more compact. For example, the middle beam 150 and the bottom plate 110 can be welded by friction stir welding.

[0129] Specifically, the third welding area 113 is located on the side of the bottom plate 110 facing the accommodation cavity 160, and the middle beam 150 covers the third welding area 113 to be welded to the third welding area 113.

[0130] Figure 16 For Figure 15 a view from another angle, Figure 17 FIG. is a schematic connection diagram of the bottom plate and the middle beam in the battery pack housing provided by the embodiment of the present application. Among them, Figure 16 only a part of the bottom plate 110 is shown.

[0131] Please continue to refer to Figures 15 to 17 As shown, the bottom plate 110 further includes a plurality of first connection parts 114, the third welding area 113 includes a plurality of welding segments 1131, and the first connection parts 114 and the welding segments 1131 are arranged at intervals along the extension direction of the middle beam 150; the second reinforcing plate 140 has through holes 141, and the first connection parts 114 are inserted into the through holes 141.

[0132] The battery pack housing 100 is generally installed on the side of the vehicle chassis facing the ground. Therefore, a bottom guard plate can be provided on the battery pack housing 100, and the bottom guard plate can protect the battery pack housing 100. The bottom guard plate can be installed on the bottom plate 110.

[0133] Specifically, the bottom plate 110 has first connection parts 114, and the first connection parts 114 can be bolts or other types of connection parts. The second reinforcing plate 140 has through holes 141, and the through holes 141 are arranged in one-to-one correspondence with the first connection parts 114. The first connection parts 114 pass through the through holes 141 to be connected to the bottom guard plate.

[0134] In order to avoid reducing the welding strength between the middle beam 150 and the bottom plate 110 by setting the first connection parts 114, the third welding area 113 can be set as a plurality of welding segments 1131, and the welding segments 1131 and the first connection parts 114 are arranged at intervals along the extension direction of the middle beam 150.

[0135] Since the second reinforcing plate 140 can reduce the deformation of the bottom plate 110, the second reinforcing plate 140 can reduce the deformation of the bottom guard plate connected to the bottom plate 110.

[0136] Figure 18 FIG. is a partial schematic view of the bottom plate in the battery pack housing provided by the embodiment of the present application.

[0137] See Figures 16 to 18 As shown, there is an exhaust hole 115 at the position on the bottom plate 110 between the adjacent welding segments 1131 and the first connection portion 114. Two adjacent exhaust holes 115 are symmetrically arranged along the first connection portion 114, and the included angle between the connection line of these two adjacent exhaust holes 115 and the extending direction of the middle beam 150 is less than 90°.

[0138] The gas generated during the welding process between the bottom plate 110 and the middle beam 150 can be discharged through the exhaust holes 115. In the embodiment of the present application, among two adjacent welding segments 1131, the exhaust holes 115 near one welding segment 1131 and the exhaust holes 115 near the other welding segment 1131 form an exhaust hole pair 116. The two exhaust holes 115 forming an exhaust hole pair 116 are symmetrically arranged on both sides of the first connection portion 114. The middle beam 150 extends along the second direction Y, and the included angle θ between the connection line of the two exhaust holes 115 and the second direction Y is less than 90°.

[0139] The length of the welding segment 1131 along the first direction is close to the distance between the two exhaust holes 115 in an exhaust hole pair 116. Therefore, the two exhaust holes 115 are symmetrically arranged on both sides of the first connection portion 114 and the included angle between the connection line of the two exhaust holes 115 and the extending direction of the third welding region 113 is less than 90°, which can reduce the size of the welding segment 1131 along the first direction X, so that there is more area in the bottom plate 110 for arranging the flow channel 111.

[0140] Next, the specific structure of the middle beam 150 will be described.

[0141] Figure 19 It is a schematic structural diagram of the bottom plate and the middle beam in the battery pack housing provided by the embodiment of the present application. Figure 20 It is a schematic structural diagram of the middle beam in the battery pack housing provided by the embodiment of the present application.

[0142] See Figure 19 and Figure 20 As shown, the middle beam 150 includes a first beam segment 151 and a second beam segment 152, and there is a gap for the connector to pass through between the first beam segment 151 and the second beam segment 152.

[0143] The battery cell modules in the first accommodation cavity 161 and the second accommodation cavity 162 can be connected by a connector. The connector can be a transfer copper bar or a connecting cable. The middle beam 150 can be divided into the first beam segment 151 and the second beam segment 152, and a gap is provided between the first beam segment 151 and the second beam segment 152, and the connector can pass through the gap. Thus, it is possible to avoid increasing the size of the battery pack housing 100 along the third direction Z.

[0144] Figure 21 ForFigure 20 Explosion schematic diagram.

[0145] See Figure 21 As shown, the middle beam 150 further includes a mounting portion 154. The mounting portion 154 is located between the first beam segment 151 and the second beam segment 152 and is detachably connected to the first beam segment 151 and the second beam segment 152. The mounting portion 154 is located in the gap, and the mounting portion 154 is provided with an opening 153 through which a connecting member can pass.

[0146] Specifically, the mounting portion 154 includes a mounting portion body 1541, a first mounting block 1542, and a second mounting block 1543. The first mounting block 1542 and the second mounting block 1543 are located at both ends of the mounting portion body 1541. The first mounting block 1542 has a first wedge block 1542a, and the first wedge block 1542a is inserted into the first beam segment 151. The second mounting block 1543 has a second wedge block 1543a, and the second wedge block 1543a is inserted into the second beam segment 152.

[0147] Both sides of the mounting portion body 1541 have first mounting holes 1541a, and the first wedge block 1542a has second mounting holes 1542b. A fastener 1544 is inserted into the first mounting holes 1541a and the second mounting holes 1542b to connect the first beam segment 151 to the mounting portion 154.

[0148] The second wedge block 1543a has third mounting holes 1543b, and another first mounting hole 1541a is aligned with the third mounting holes 1543b. Another fastener 1544 is inserted into the first mounting holes 1541a and the third mounting holes 1543b to connect the second beam segment 152 to the mounting portion 154. The opening 153 is arranged facing the bottom plate 110, which is convenient for the assembly of the battery pack.

[0149] Figure 22 It is a schematic structural diagram of the battery pack provided by the embodiment of the present application.

[0150] See Figure 22 As shown, the embodiment of the present application further provides a battery pack 1000, which includes a plurality of battery cell modules and the above-mentioned battery pack housing 100. The battery cell modules are located in the battery pack housing 100.

[0151] Among them, the specific structure of the battery pack housing 100 has been described in detail in the above embodiments and will not be elaborated here one by one.

[0152] The battery pack 1000 further includes battery cell modules. In Figure 22 one, one battery cell module can be arranged in the first accommodation cavity 161, and one battery cell module can also be arranged in the second accommodation cavity 162. Each battery cell module can include a plurality of battery cells 200. In Figure 22In this case, one battery cell 200 is shown in each of the first accommodation cavity 161 and the second accommodation cavity 162.

[0153] Please continue to refer to Figure 22 As shown, the battery pack 1000 further includes a connecting member 300 which is passed through an opening 153 of an intermediate beam 150 of the battery pack housing 100 for electrically connecting at least two battery cell modules.

[0154] The multiple battery cells 200 in the battery cell module in the first accommodation cavity 161 are electrically connected, and the multiple battery cells 200 in the battery cell module in the second accommodation cavity 162 are electrically connected. The battery cell module in the first accommodation cavity 161 and the battery cell module in the second accommodation cavity 162 can be electrically connected through the connecting member 300. In Figure 22 this case, the connecting member is schematically shown as a transition copper bar.

[0155] Specifically, when the battery pack 1000 is assembled, the "inverted assembly" method is adopted. The meaning of "inverted assembly" is that first, the side of the battery cell module facing the bottom plate 110 is upward, and the battery pack housing 100 is inverted on the battery cell module. At this time, the mounting portion 154 has not been provided on the intermediate beam 150, and the connecting member 300 can be located between the first beam segment 151 and the second beam segment 152, thereby preventing interference between the intermediate beam 150 and the connecting member 300. Then, the battery pack housing 100 with the battery cell module is turned over so that the bottom plate 110 faces downward, and the mounting portion 154 is connected to the first beam segment 151 and the second beam segment 152. The opening 153 on the mounting portion 154 faces the bottom plate 110, thereby avoiding the position of the connecting member 300.

[0156] The embodiment of the present application further provides an electrical device including at least one of the above-mentioned battery packs 1000. The battery pack 1000 is used to supply electrical energy to the electrical device. The electrical device can be a vehicle, an aircraft, a ferry, a computer, an energy storage cabinet or other devices powered by the battery pack 1000. Among them, the vehicle can be an electric vehicle (EV), a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or a new energy vehicle.

[0157] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack housing (100), characterized in that, include: Bottom plate (110); A side beam (120), the side beam (120) being arranged around the periphery of the bottom plate (110), the side beam (120) being connected to the bottom plate (110) and enclosing to form a receiving cavity (160); A first reinforcing plate (130), the first reinforcing plate (130) being located on a side of the bottom plate (110) facing away from the accommodating cavity (160), the orthographic projection of the first reinforcing plate (130) on the bottom plate (110) covering at least a portion of a connection between the bottom plate (110) and the side beam (120); the first reinforcing plate (130) being connected to the side beam (120) and / or the bottom plate (110).

2. The battery pack housing (100) according to claim 1, characterized in that, The side beam (120) comprises two first side beams (120a) arranged opposite to each other along a first direction and two second side beams (120b) arranged opposite to each other along a second direction, the size of the first side beam (120a) along the second direction is smaller than the size of the second side beam (120b) along the first direction (X), and the orthographic projection of the first reinforcing plate (130) on the bottom plate (110) covers at least part of the connection between the bottom plate (110) and the first side beam (120a).

3. The battery pack housing (100) according to claim 1, characterized in that, The first reinforcing plate (130) comprises a first reinforcing portion (131) and a second reinforcing portion (132); an orthographic projection of the first reinforcing portion (131) on the bottom plate (110) covers at least a portion of a connection between the bottom plate (110) and the side beam (120); a dimension of the first reinforcing portion (131) along a thickness direction of the bottom plate (110) is greater than a dimension of the second reinforcing portion (132) along the thickness direction of the bottom plate (110).

4. The battery pack housing (100) according to claim 3, wherein, The first reinforcement portion (131) has a first cavity (1311) therein, and the second reinforcement portion (132) has a second cavity (1321) therein, and the wall thickness of the first cavity (1311) is greater than the wall thickness of the second cavity (1321).

5. The battery pack housing (100) according to claim 4, characterized in that, The wall thickness of the first cavity (1311) is 1.5 mm-2 mm, and / or the wall thickness of the second cavity (1321) is 0.8 mm-1.2 mm.

6. The battery pack housing (100) according to any one of claims 1 to 5, characterized in that, It also includes a first adhesive layer (133), wherein the first adhesive layer (133) is located between the first reinforcing plate (130) and the bottom plate (110), and the first adhesive layer (133) is used to bond the first reinforcing plate (130) and the bottom plate (110).

7. The battery pack housing (100) according to any one of claims 1 to 5, characterized in that, The side beam (120) comprises a first welding area (121), and the bottom plate (110) is welded to the first welding area (121); and / or, The side beam (120) comprises a second welding area (122), and the first reinforcing plate (130) is welded to the second welding area (122).

8. The battery pack housing (100) according to any one of claims 1 to 5, characterized in that, It also includes a second reinforcing plate (140), which is arranged in the middle area of the bottom plate (110) along the first direction and is located on the side of the bottom plate (110) away from the accommodating cavity (160), and the second reinforcing plate (140) is connected to the side beam (120) at both ends along the second direction, and the second reinforcing plate (140) is connected to the bottom plate (110).

9. The battery pack housing (100) according to claim 8, characterized in that, The invention also includes an intermediate beam (150), wherein the intermediate beam (150) is located in the accommodating cavity (160) and is connected to the bottom plate (110), the intermediate beam (150) and the second reinforcing plate (140) are located on two opposite sides of the bottom plate (110), and the orthographic projection of the second reinforcing plate (140) on the bottom plate (110) covers at least part of the connection between the bottom plate (110) and the intermediate beam (150), and the second reinforcing plate (140) is used to support the connection between the bottom plate (110) and the intermediate beam (150).

10. The battery pack housing (100) according to claim 9, characterized in that, It also includes a second adhesive layer (142), which is located between the second reinforcing plate (140) and the bottom plate (110), and the second adhesive layer (142) is used to bond the second reinforcing plate (140) and the bottom plate (110).

11. The battery pack housing (100) according to claim 9, characterized in that, The bottom plate (110) comprises a third welding area (113), and the middle beam (150) is welded to the third welding area (113).

12. The battery pack housing (100) according to claim 11, wherein, The bottom plate (110) further comprises a plurality of first connecting portions (114), the third welding area (113) comprises a plurality of welding sections (1131), the first connecting portions (114) and the welding sections (1131) being arranged at intervals along the extension direction of the middle beam (150); the second reinforcing plate (140) comprises a through hole (141), and the first connecting portion (114) is inserted into the through hole (141).

13. The battery pack housing (100) according to claim 12, wherein, The bottom plate (110) is provided with an exhaust hole (115) at a position between the adjacent welding section (1131) and the first connecting portion (114); two adjacent exhaust holes (115) are symmetrically arranged along the first connecting portion (114); and a line connecting the two adjacent exhaust holes (115) and an extension direction of the middle beam (150) form an angle less than 90°.

14. The battery pack housing (100) according to claim 9, wherein, The intermediate beam (150) comprises a first beam section (151) and a second beam section (152), and a gap is provided between the first beam section (151) and the second beam section (152) for a connecting member (300) to pass through.

15. The battery pack housing (100) according to claim 14, characterized in that, The intermediate beam (150) further comprises a mounting portion (154), wherein the mounting portion (154) is located between the first beam section (151) and the second beam section (152) and the mounting portion (154) is detachably connected to the first beam section (151) and the second beam section (152), the mounting portion (154) is located in the gap, and the mounting portion (154) is provided with an opening (153) through which the connecting member (300) can pass.

16. The battery pack housing (100) according to any one of claims 1 to 5, characterized in that, The bottom plate (110) is a liquid cooling plate.

17. A battery pack (1000), characterized in that, It includes a battery cell module and the battery pack housing (100) according to any one of claims 1 to 16, and the battery cell module is located in the battery pack housing (100).

18. The battery pack (1000) according to claim 17, characterized in that, It further includes a connecting member (300). There are at least two battery cell modules, and the at least two battery cell modules are located on opposite sides of the intermediate beam (150) of the battery pack housing (100). The connecting member (300) is inserted through the opening (153) of the intermediate beam (150) of the battery pack housing (100) for electrically connecting the at least two battery cell modules.

19. An electrical device, characterized in that, It includes at least one battery pack (1000) according to claim 17 or 18.

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