Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and provides a battery pack and electric equipment, the battery pack comprises a lower shell and a battery cell module, the lower shell comprises a bottom plate and a first edge beam surrounding the peripheral side of the bottom plate, and the bottom plate and the first edge beam define a first accommodating cavity. The battery cell module is located in the first containing cavity, and part of the side face of the battery cell module is higher than the top end face of the first edge beam in the height direction of the battery pack. In the assembling process of the battery pack provided by the embodiment of the invention, the procedure of overturning the lower shell is omitted, the assembling procedures are fewer, the operation is simple, and the assembling process of the battery pack can be effectively simplified, so that the assembling efficiency of the battery pack is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly relates to a battery pack and an electrical device. Background Art

[0002] With the continuous enhancement of people's environmental awareness, new energy vehicles are increasingly favored by people. New energy vehicles use batteries as the power source, with low usage costs, no exhaust emissions, and are friendly to the environment.

[0003] New energy vehicles generally include a battery pack and an electric motor. The battery pack is electrically connected to the electric motor, and the battery pack can supply power to the electric motor so that the electric motor can drive the vehicle to travel. The battery pack includes a lower housing and a battery cell module located in the lower housing, and accessories such as connection plates are also provided between the battery cell modules. Currently, during the assembly process of the battery pack, it is necessary to first weld the connection plates between the battery cell modules, and then assemble the battery cell module and the lower housing. During this process, it is necessary to buckle the lower housing on the battery cell module, and then turn the battery cell module and the lower housing over together. Its assembly process is cumbersome and complex, reducing the assembly efficiency of the battery pack. Summary of the Utility Model

[0004] The present application provides a battery pack and an electrical device, which can effectively simplify the assembly process of the battery pack, thereby effectively improving the assembly efficiency of the battery pack.

[0005] One aspect of the present application provides a battery pack, including:

[0006] A lower housing, including a bottom plate and a first side beam surrounding the periphery of the bottom plate, and the bottom plate and the first side beam enclose a first accommodation cavity;

[0007] A battery cell module, located in the first accommodation cavity, and along the height direction of the battery pack, a part of the side surface of the battery cell module is higher than the top end surface of the first side beam.

[0008] In the embodiment of the present application, by making the battery cell module protrude from the first accommodation cavity of the lower housing, a part of the side surface of the battery cell module is higher than the top end surface of the first side beam. The part of the side surface of the battery cell module that protrudes from the first side beam can be used for electrical connection with the connecting piece. During the assembly process of the battery pack, the battery cell module can be first loaded into the lower housing. Since a part of the side surface of the battery cell module is higher than the first side beam, a part of the side surface of the battery cell module is not surrounded by the first side beam. Thus, the connecting piece can be welded on the side surface of the battery cell module protruding from the first accommodation cavity. Since the connecting piece is not welded between the battery cell modules when the battery cell module is loaded into the lower housing, there is no need to consider problems such as breakage of the connecting piece during the process of loading the battery cell module into the lower housing. Therefore, the battery cell module can be lifted and loaded into the lower housing without flipping the lower housing, eliminating the flipping process of the lower housing. Its assembly process is less and the operation is simple, which can effectively simplify the assembly process of the battery pack, thereby effectively improving the assembly efficiency of the battery pack.

[0009] In a possible implementation manner, along the height direction of the battery pack, the height of the battery cell module is h, and the height of the side surface of the battery cell module that is higher than the top end surface of the first side beam is G, where 5%h ≤ G ≤ 50%h.

[0010] In a possible implementation manner, the first accommodation cavity includes a mutually separated sub-cavity and a buffer cavity, and the battery cell module is located in the sub-cavity;

[0011] The buffer cavity is provided at at least one end of the sub-cavity along the first direction.

[0012] In a possible implementation manner, it further includes:

[0013] An intermediate beam assembly, located in the first accommodation cavity, and the intermediate beam assembly divides the first accommodation cavity into the sub-cavity and the buffer cavity;

[0014] Along the height direction of the battery pack, the top end surface of the intermediate beam assembly is flush with the top end surface of the battery cell module.

[0015] In a possible implementation manner, the intermediate beam assembly includes:

[0016] A longitudinal beam, and the longitudinal beam extends in the first accommodation cavity along the first direction;

[0017] A cross beam, the cross beam intersects with the longitudinal beam, and the cross beam extends in the first accommodation cavity along the second direction;

[0018] And the cross beam and a part of the first side beam enclose the buffer cavity;

[0019] The longitudinal beam, the cross beam and a part of the first side beam enclose a plurality of the sub-cavities.

[0020] In a possible implementation manner, a reinforcing member is provided in each of the buffer cavities. The reinforcing member extends along a first direction, and one end of the reinforcing member is connected to the cross beam, and the other end is connected to the first side beam.

[0021] In a possible implementation manner, a protection beam is further included. The protection beam is provided on the outer surface of at least one end of the lower housing along a second direction.

[0022] In a possible implementation manner, the following are further included:

[0023] An upper cover is covered on the lower housing and is connected to the first side beam. The upper cover has a second accommodation cavity;

[0024] The part of the battery cell module that is higher than the top end face of the first side beam is located in the second accommodation cavity.

[0025] In a possible implementation manner, the upper cover includes a top plate and a second side beam surrounding the top plate. The top plate and the second side beam surround to form the second accommodation cavity; the second side beam is connected to the first side beam;

[0026] And the second side beam surrounds the side surface of the part of the battery cell module that protrudes from the first accommodation cavity.

[0027] In a possible implementation manner, a power distribution module is provided in one of the buffer cavities. The power distribution module is electrically connected to the battery cell module;

[0028] An operation window is opened at a position of the upper cover opposite to the power distribution module, and a part of the power distribution module protrudes out of the operation window.

[0029] In a possible implementation manner, a top cover is further included. The top cover is covered on the upper cover, and the top cover covers the part of the power distribution module that protrudes out of the operation window;

[0030] And a lead outlet is opened on the top cover, and the conducting wire in the power distribution module is led out through the lead outlet.

[0031] In a possible implementation manner, a connecting piece is further included. The battery cell modules are electrically connected to each other through the connecting piece, and the connecting piece is located on the side surface of the part of the battery cell module that is higher than the top end face of the first side beam.

[0032] In a possible implementation manner, the bottom plate is a liquid cooling plate. The liquid cooling plate includes a plurality of cooling tubes, and a coolant is provided in the cooling tubes.

[0033] In a possible implementation manner, a bottom guard plate is further included. The bottom guard plate is connected to the bottom plate of the lower housing, and the bottom guard plate is located on the side of the bottom plate facing away from the first accommodation cavity.

[0034] In a possible implementation manner, exhaust holes are formed in the first side beam, and the first accommodation cavity communicates with the outside through the exhaust holes;

[0035] An explosion-proof valve is further included, and the explosion-proof valve is plugged in the exhaust holes.

[0036] In a possible implementation manner, the upper cover further includes:

[0037] A first flange, the first flange surrounds the second side beam, the first flange is connected to the first side beam, and the second side beam is connected to the first side beam through the first flange.

[0038] In a possible implementation manner, the first flange includes a first flanging structure, and the first flanging structure is located at the outer edge of the first flange.

[0039] In a possible implementation manner, the top cover further includes:

[0040] A second flange, the second flange surrounds the top cover, the second flange is connected to the upper cover, and the top cover is connected to the upper cover through the second flange.

[0041] In a possible implementation manner, the second flange includes a second flanging structure, and the second flanging structure is located at the edge of the second flange.

[0042] The second aspect of the present application provides an electrical device, including a vehicle body and any one of the above-mentioned battery packs, and the battery pack is installed on the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0044] Figure 1 It is a schematic structural diagram of a battery pack provided by an embodiment of the present application;

[0045] Figure 2 It is a schematic structural diagram of a battery pack after removing the upper cover provided by an embodiment of the present application;

[0046] Figure 3 Exploded view of a battery pack provided by an embodiment of the present application;

[0047] Figure 4 Structural diagram of a lower housing provided by an embodiment of the present application;

[0048] Figure 5 Structural diagram of a bottom guard plate provided by an embodiment of the present application.

[0049] Reference numerals

[0050] 100 - Battery pack;

[0051] 110 - Lower housing;

[0052] 111 - Bottom plate;

[0053] 112 - First side beam; 1121 - Exhaust hole; 1122 - Explosion - proof valve;

[0054] 113 - First accommodation cavity; 1131 - Sub - cavity; 1132 - Buffer cavity;

[0055] 114 - Intermediate beam assembly; 1141 - Longitudinal beam; 1142 - Cross beam;

[0056] 115 - Reinforcing member;

[0057] 116 - Protection beam; 1161 - First connection hole;

[0058] 120 - Battery cell module;

[0059] 130 - Upper cover;

[0060] 131 - Top plate; 132 - Second side beam; 133 - Operation window;

[0061] 134 - First flange; 135 - First flanging structure;

[0062] 140 - Top cover;

[0063] 141 - Lead outlet; 142 - Second flange; 143 - Second flanging structure;

[0064] 150 - Bottom guard plate;

[0065] 160 - Lifting lug; 161 - Second connection hole. Detailed implementation manners

[0066] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0067] An embodiment of the present application provides a battery pack and an electrical device including the battery pack. Among them, the vehicle can be a sedan, a bus, or a truck. For example, 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), a new energy vehicle, or any vehicle with a battery.

[0068] The following takes the electrical device being a vehicle as an example for illustration.

[0069] The vehicle may further include a vehicle body, an axle, and a motor. Among them, the battery pack, the axle, and the motor may all be provided on the vehicle body. The battery pack may be electrically connected to the motor, the motor may be connected to the axle, and the battery pack may supply power to the motor so that the motor can rotate, and the motor can drive the axle to rotate during rotation, so that the vehicle can travel.

[0070] Among them, the vehicle body may include a vehicle chassis and a body provided on the chassis. The body may have a passenger compartment, and a driver's seat, passenger seats, etc. may be provided in the passenger compartment. The driver may sit on the driver's seat to operate the vehicle. For example, structural components such as a steering wheel, a clutch, and a brake may also be provided on the body to enable the vehicle to achieve complete functions. The present application does not make any limitations.

[0071] In the related art, a battery pack includes a lower housing and a battery cell module located in the lower housing. A connecting piece is disposed between the battery cell modules to electrically connect the respective battery cell modules. Among them, the side beam of the lower housing is usually higher than the height of the battery cell module, and the side beam on the lower housing completely surrounds the side of the battery cell module. In this way, when assembling the battery pack, since the side of the battery cell module is completely surrounded by the side beam, it is necessary to first weld the connecting piece between the battery cell modules and then assemble the battery cell module and the lower housing. During this process, since the battery cell modules are connected by the connecting piece, if the battery cell module is lifted and inserted into the lower housing, the connecting piece between the battery cell modules is easily broken during the movement of the battery cell module. Therefore, usually, the lower housing is inverted on the battery cell module to insert the battery cell module into the cavity of the lower housing. After inserting the battery cell module into the cavity of the lower housing, it is necessary to turn the battery cell module and the lower housing together so that the battery pack is in an upright posture for subsequent assembly processes.

[0072] However, in the above battery pack structure, the assembly of the battery pack is cumbersome and complex, reducing the assembly efficiency of the battery pack.

[0073] To solve the above problems, an embodiment of the present application provides a battery pack. By making the battery cell module protrude from the first accommodation cavity of the lower housing, a part of the side surface of the battery cell module is higher than the top end surface of the first side beam. The part of the side surface of the battery cell module protruding from the first side beam can be used for electrical connection with the connecting piece. During the assembly process of the battery pack, the battery cell module can be first inserted into the lower housing. Since a part of the side surface of the battery cell module is higher than the first side beam, a part of the side surface of the battery cell module is not surrounded by the first side beam. Thus, the connecting piece can be welded to the side surface of the battery cell module protruding from the first accommodation cavity. Since the connecting piece is not welded between the respective battery cell modules when the battery cell module is inserted into the lower housing, there is no need to consider problems such as breakage of the connecting piece during the process of inserting the battery cell module into the lower housing. Therefore, the battery cell module can be lifted and inserted into the lower housing without inverting the lower housing, saving the inverting process of the lower housing. Its assembly process is less and the operation is simple, which can effectively simplify the assembly process of the battery pack and thus effectively improve the assembly efficiency of the battery pack.

[0074] The following will describe in detail the battery pack provided by the embodiment of the present application with reference to the accompanying drawings.

[0075] Figure 1 It is a schematic structural diagram of a battery pack provided by an embodiment of the present application. Figure 2 It is a schematic structural diagram of a battery pack provided by an embodiment of the present application after removing the upper cover. Figure 3 It is an exploded schematic diagram of a battery pack provided by an embodiment of the present application.

[0076] A battery pack 100 provided by an embodiment of the present application is shown in Figure 1 andFigure 2 As shown, the battery pack 100 may include a lower housing 110 and a battery cell module 120 located in the lower housing 110. Among them, Figure 3 As shown, the lower housing 110 may include a bottom plate 111 and a first side beam 112 surrounding the periphery of the bottom plate 111. The first side beam 112 may be a side plate of the lower housing 110, and the first side beam 112 and the bottom plate 111 may jointly enclose a first accommodation cavity 113.

[0077] The first accommodation cavity 113 may be used to accommodate the components forming the battery pack 100. The battery cell module 120 and other components forming the battery pack 100 may be disposed in the first accommodation cavity 113. The lower housing 110, as a carrier of the battery pack 100, may provide support and protection for the battery cell module 120. The first side beam 112 may provide protection for the battery cell module 120 on the periphery of the battery pack 100 to reduce or avoid the impact force from the outside acting on the battery cell module 120, effectively reducing the damage of the battery cells caused by external impact force, and helping to improve the service life of the battery cell module 120.

[0078] Among them, the number of the battery cell modules 120 may be multiple, and the multiple battery cell modules 120 may be electrically connected to form a large-capacity battery cell module 120 assembly. For example, the battery pack 100 may further include connection tabs (not shown in the figure), and the battery cell modules 120 may be electrically connected through the connection tabs. For example, the connection tabs and the battery cell modules 120 may be electrically connected by welding. The welding connection is simple in operation and reliable in connection, which can effectively improve the firmness and reliability of the electrical connection between the connection tabs and the battery cell modules 120, and improve the operation efficiency of the electrical connection operation between the battery cell modules 120.

[0079] See Figure 2 As shown, along the height direction of the battery (i.e., Figure 3 the z direction in

[0080] The part of the battery cell module 120 protruding from the first side beam 112 on the side can be used for electrical connection with the connecting piece. For example, during the assembly of the battery pack 100, the battery cell module 120 can be first installed in the lower housing 110. At this time, the side of the battery cell module 120 will not be completely wrapped by the lower housing 110, and part of the side of the battery cell module 120 can be exposed outside the first accommodation cavity of the lower housing 110. The connecting piece can be located on the part of the side of the battery cell module 120 that is higher than the top end face of the first side beam 112, that is, the connecting piece can be welded to the part of the side of the battery cell module 120 that is exposed outside to complete the assembly operation among the battery cell module 120, the connecting piece, and the lower housing 110.

[0081] During the above assembly process, the connecting piece can be welded after the battery cell module 120 is first installed in the lower housing 110. Since the connecting piece is not welded between the battery cell modules 120 when the battery cell module 120 is installed in the lower housing 110, there is no need to consider problems such as breakage of the connecting piece during the installation of the battery cell module 120 into the lower housing 110. Therefore, the battery cell module 120 can be lifted and installed in the lower housing 110 without flipping the lower housing 110, saving the flipping process of the lower housing 110. Its assembly process is less and the operation is simple, which can effectively simplify the assembly process of the battery pack 100, thereby effectively improving the assembly efficiency of the battery pack 100.

[0082] Continue to refer to Figure 2 and Figure 3 As shown, along the height direction of the battery pack 100 (that is, the z direction in Figure 2 ), the height of the battery cell module 120 can be h, and the height of the side of the battery cell module 120 that is higher than the top end face of the first side beam 112 is G, that is, the height of the side of the battery cell module 120 protruding from the first accommodation cavity 113 is G, and 5%h ≤ G ≤ 50%h. That is, the height of the side of the battery cell module 120 protruding from the first accommodation cavity 113 is between 5% and 50% of the height of the battery cell module 120. For example, the height of the side of the battery cell module 120 protruding from the first accommodation cavity 113 can be equal to 5%, 10%, 25%, 35%, 50%, etc. of the height of the battery cell module 120. The above height values can provide sufficient space on the side of the battery cell module 120 to facilitate welding the connecting piece to the side of the battery cell module 120, improving the operability of the connecting piece welding operation and enhancing the reliability and stability of the connecting piece welding operation.

[0083] Continue to refer to Figure 3As shown, the battery pack 100 may further include an upper cover 130. The upper cover 130 may be disposed on the lower housing 110 and connected to the first side beam 112 of the lower housing 110. The upper cover 130 may have a second accommodation cavity (not shown in the figure). The part of the battery cell module 120 that is higher than the top end face of the first side beam 112 may be located in the second accommodation cavity, that is, the part of the battery cell module 120 that protrudes from the first accommodation cavity 113 may be located in the second accommodation cavity. The first accommodation cavity 113 and the second accommodation cavity may jointly provide an accommodation space for the battery cell module 120 to wrap the battery cell module 120.

[0084] The upper cover 130 and the lower housing 110 may jointly provide sealing protection for the battery cell module 120, which can reduce or prevent external water, stains, etc. from entering the battery cell module 120, and can reduce or prevent water stains from entering the battery cell module 120 and causing damage to the battery cell module 120, which helps to improve the working stability of the battery cell module 120 and enhance the safety of the battery, thereby effectively increasing the service life of the battery pack 100.

[0085] Continue to refer to Figure 3 As shown, the upper cover 130 may include a top plate 131 and a second side beam 132 surrounding the top plate 131. The top plate 131 and the second side beam 132 may surround to form the second accommodation cavity, and the second side beam 132 may be connected to the first side beam 112. For example, the second side beam 132 and the first side beam 112 may be connected by bolts, welding or other means.

[0086] Among them, the second side beam 132 may surround the side surface of the part of the battery cell module 120 that protrudes from the first accommodation cavity 113. The second side beam 132 and the first side beam 112 may jointly provide rigid support for the battery in the height direction of the battery pack 100 to reduce or prevent the battery pack 100 from deforming under an external impact force in the height direction. It can provide protection for the internal battery cell module 120 to prevent the battery cell module 120 from deforming under an external impact force and then being damaged or short-circuited and catching fire, etc., which helps to improve the safety of the battery pack 100, thereby effectively enhancing the reliability and stability of the battery pack 100 during operation.

[0087] Continue to refer to Figure 3As shown, the upper cover 130 may further include a first flange 134. The first flange 134 may surround the second side beam 132. The first flange 134 may be connected to the first side beam 112. The second side beam 132 may be connected to the first side beam 112 through the first flange 134. For example, the first flange 134 and the first side beam 112 may be connected by bolt fasteners. For example, threaded holes may be provided on the top end face of the first side beam 112, and through holes matching the threaded holes may be provided on the first flange 134. The bolt fasteners may pass through the through holes and be screwed into the threaded holes so that the first flange 134 and the first side beam 112 can be connected through the cooperation between the bolt fasteners and the through holes and threaded holes.

[0088] By connecting the first flange 134 to the first side beam 112, the assembly operation between the upper cover 130 and the lower housing 110 can be facilitated, which helps to improve the assembly efficiency between the lower housing 110 and the upper cover 130.

[0089] Among them, the distance between two adjacent through holes on the first flange 134 may be 60 mm to 100 mm. For example, the distance between two adjacent through holes on the first flange 134 may be 60 mm, 70 mm, 85 mm, 90 mm, 100 mm, etc. Correspondingly, the distance between two adjacent threaded holes on the first side beam 112 is the same as the distance of the through holes. The above through hole spacing can make the connection between the upper cover 130 and the lower housing 110 more reliable and stable, and can effectively reduce or avoid a large gap between the first flange 134 and the first side beam 112, which helps to improve the sealing performance and reliability of the connection between the upper cover 130 and the lower housing 110.

[0090] The first flange 134 may further include a first flanging structure 135. The first flanging structure 135 may be located at the outer edge of the first flange 134. The first flanging structure 135 can improve the structural strength and stiffness of the first flange 134, which helps to improve the overall structural stability of the first flange 134, thereby effectively enhancing the reliability and stability of the connection between the upper cover 130 and the lower housing 110.

[0091] Figure 4 This is a schematic structural diagram of a lower housing provided by an embodiment of the present application.

[0092] See Figure 4 As shown, the first accommodation cavity 113 may include a sub-cavity 1131 and a buffer cavity 1132 that are separated from each other. The battery cell module 120 may be located in the sub-cavity 1131, and the buffer cavity 1132 may be provided at at least one end of the sub-cavity 1131 along the first direction. For example, the first direction may be the length direction of the lower housing 110 (i.e., Figure 4in the x - direction of [it], or the first direction can also be the width - direction of the lower housing 110 (i.e., Figure 4 the y - direction of [it]). In the embodiments of the present application, the case where the first direction is the length - direction of the lower housing 110 will be taken as an example for description.

[0093] The buffer cavity 1132 can provide a buffer space for the sub - cavity 1131 in the first direction. When the battery pack 100 is subjected to an external impact force in the first direction, the buffer cavity 1132 can absorb part of the buffer force to reduce the impact force received by the battery cell module 120 in the sub - cavity 1131. This can effectively reduce or avoid problems such as damage to the battery cell module 120 under an external impact force, which may lead to internal short - circuit and fire, and can effectively improve the safety of the battery.

[0094] For example, buffer cavities 1132 can be provided at both ends of the sub - cavity 1131. In this way, in the first direction, the buffer cavities 1132 can provide buffer protection for the battery cell module 120 in the sub - cavity 1131 at both ends. When the battery pack 100 is subjected to an external impact force at any one of the two ends in the first direction, the buffer cavity 1132 can provide buffer protection for the battery cell module 120, which can effectively improve the protection effect on the battery cell module 120, thereby effectively improving the safety of the battery pack 100.

[0095] Continue to refer to Figure 4 As shown, the battery pack 100 may further include an intermediate beam assembly 114. The intermediate beam assembly 114 can divide the first accommodation cavity 113 into the above - mentioned sub - cavity 1131 and buffer cavity 1132. Among them, along the height - direction of the battery pack 100 (i.e., Figure 4 the z - direction of [it]), the top end face of the intermediate beam assembly 114 is flush with the top end face of the battery cell module 120. For example, the intermediate beam assembly 114 can also protrude from the first accommodation cavity 113, and the part of the intermediate beam protruding from the first accommodation cavity 113 can be located in the second accommodation cavity of the upper cover 130.

[0096] The intermediate beam assembly 114 can also provide a rigid support for the battery pack 100 in the height - direction of the battery pack 100 to reduce or avoid deformation of the battery pack 100 under the action of an impact force in the height - direction, so that the battery cell module 120 in the sub - cavity 1131 is squeezed and deformed. It can provide impact protection for the battery cell module 120, avoid damage, short - circuit or fire of the battery cell module 120 under the action of an external impact force, which helps to improve the safety of the battery pack 100 and enhance the overall structural stability of the battery pack 100.

[0097] Continue to refer to Figure 4As shown, the middle beam assembly 114 may include a longitudinal beam 1141 and a cross beam 1142. The longitudinal beam 1141 may extend in the first accommodation cavity 113 along the first direction, that is, the longitudinal beam 1141 extends along the length direction of the lower housing 110. The cross beam 1142 may intersect with the longitudinal beam 1141 and the cross beam 1142 may extend in the first accommodation cavity 113 along the second direction. The cross beam 1142 and a part of the first side beam 112 may enclose a buffer cavity 1132. For example, the number of the cross beams 1142 may be multiple, and the multiple cross beams 1142 may be arranged at intervals along the first direction. Among them, two cross beams 1142 near both ends of the lower housing 110 may respectively form the above two buffer cavities 1132 with parts of the first side beam 112 at the corresponding positions at both ends, so as to provide buffer protection for the battery cell module 120 at both ends of the lower housing 110.

[0098] The longitudinal beam 1141, the cross beam 1142 and a part of the first side beam 112 may enclose a plurality of sub-cavities 1131. The plurality of battery cell modules 120 may be respectively arranged in the respective sub-cavities 1131. The sub-cavities 1131 may respectively provide accommodation spaces for the respective battery cell modules 120 to separate the respective battery cell modules 120. Among them, in the height direction of the battery pack 100, the top end faces of the cross beam 1142 and the longitudinal beam 1141 may be flush with the top end faces of the battery cell modules 120.

[0099] The cross beam 1142 and the longitudinal beam 1141 forming the sub-cavities 1131 may provide protection for the respective battery cell modules 120. When the battery pack 100 is subjected to an external impact force, the cross beam 1142 and the longitudinal beam 1141 may provide rigid support to reduce or avoid deformation of the battery pack 100 under the action of the external impact force, prevent the external impact force from acting on the battery cell module 120 and causing damage to the battery cell module 120, and further cause situations such as short circuit and fire of the battery pack 100, and can effectively improve the safety of the battery pack 100.

[0100] Continue to refer to Figure 4 As shown, a reinforcing member 115 may be arranged in each buffer cavity 1132. The reinforcing member 115 may extend along the first direction, and one end of the reinforcing member 115 may be connected to the cross beam 1142 and the other end may be connected to the first side beam 112. The reinforcing member 115 may provide rigid support for the battery pack 100 in the first direction, and may resist the impact force on the battery pack 100 in the first direction to reduce or avoid deformation of the battery pack 100 under the action of the impact force in the first direction, and further cause the battery cell module 120 in the sub-cavity 1131 to be squeezed or damaged, and can effectively improve the protection of the battery cell module 120, thereby effectively improving the safety of the battery pack 100.

[0101] For example, a plurality of reinforcing members 115 may be provided in each buffer cavity 1132, and the plurality of reinforcing members 115 may be spaced apart along the second direction (i.e., the width direction of the battery pack 100). This can increase the protection range of the reinforcing members 115, so that the battery pack 100 can be rigidly supported by the reinforcing members 115 in the width direction, effectively improving the overall structural strength and stiffness of the battery pack 100, thereby effectively improving the overall structural stability of the battery pack 100, enhancing the anti-extrusion ability of the battery pack 100, and improving the safety and service life of the battery pack 100.

[0102] Continuing to refer to Figure 4 As shown, the battery pack 100 may further include a protection beam 116. The protection beam 116 may be provided on the outer surface of at least one end of the lower housing 110 along the second direction, and the protection beam 116 may extend along the first direction. The protection beam 116 can provide rigid protection for the battery pack 100 on the outside of the lower housing 110. When the battery pack 100 is subjected to an impact force in the second direction, the impact force can first act on the protection beam 116, so that the protection beam 116 can absorb part of the impact force. This can effectively reduce the force on the first side beam 112 of the lower housing 110, reduce or avoid deformation of the first side beam 112, effectively prevent the battery cell module 120 from being squeezed and deformed, thereby effectively improving the protection of the battery cell module 120, enhancing the anti-extrusion ability of the battery pack 100, and improving the safety and service life of the battery pack 100.

[0103] For example, protection beams 116 may be provided at both ends of the lower housing 110 along the second direction. This can provide protection for the battery pack 100 at both ends of the lower housing 110, effectively enhancing the anti-deformation ability of the battery pack 100, improving the anti-extrusion performance of the battery pack 100, and making the battery pack 100 have higher safety.

[0104] Among them, a first connection hole 1161 may be provided on the protection beam 116, and the battery pack 100 may be connected to the vehicle body through the first connection hole 1161. For example, the battery pack 100 and the vehicle body may be connected by bolt fasteners.

[0105] Continuing to refer to Figure 4 As shown, the battery pack 100 may further include lifting lugs 160. The lifting lugs 160 may be located at both ends of the lower housing 110 along the first direction (i.e., the length direction of the lower housing 110). Both ends of the battery pack 100 may be connected to the vehicle body through the lifting lugs 160. For example, the lifting lugs 160 and the vehicle body may be connected by bolt fasteners. For example, a second connection hole 161 may be provided on the lifting lugs 160, and there is also a hole on the vehicle body that matches the second connection hole 161. The bolt fasteners may be sequentially connected to the hole on the vehicle body and the second connection hole 161, so that the lifting lugs 160 can be connected to the vehicle body through the cooperation of the bolt fasteners and the second connection hole 161.

[0106] A power distribution module (not shown in the figure) may be provided in one of the buffer cavities 1132. The power distribution module may be electrically connected to the battery cell module 120. An operation window 133 may be opened at a position on the upper cover 130 opposite to the power distribution module, and a part of the power distribution module may extend out of the operation window 133. The power distribution module may be used to distribute the electric energy in the battery pack 100 to provide power for different components in the vehicle, so that each electrical component in the vehicle can operate normally.

[0107] Continue to refer to Figure 4 As shown, an exhaust hole 1121 may be opened on the first side beam 112 of the lower housing 110. The first accommodation cavity 113 may communicate with the outside through the exhaust hole 1121, and the exhaust hole 1121 may discharge the gas in the first accommodation cavity 113 to the outside. When the battery encounters an extreme situation and generates a large amount of heat in the first accommodation cavity 113, the pressure inside the lower housing 110 increases. At this time, the gas inside the lower housing 110 may be quickly discharged through the exhaust hole 1121. To reduce or avoid dangerous situations such as explosion due to excessive pressure inside the lower housing 110, which helps to ensure the safety of the battery pack 100.

[0108] For example, an explosion-proof valve 1122 may be provided in the exhaust hole 1121 (refer to Figure 3 As shown). The explosion-proof valve 1122 and the exhaust hole 1121 may be connected by screw fit. When the internal air pressure of the lower housing 110 increases, the explosion-proof valve 1122 may be disengaged from the exhaust hole 1121 under the action of the air pressure, so that the gas in the lower housing 110 can be discharged from the exhaust hole 1121 in time, to avoid safety accidents of the battery pack 100, thereby effectively improving the safety of the battery pack 100.

[0109] Refer to Figure 3 As shown, the battery pack 100 may further include a top cover 140. The top cover 140 may be covered on the upper cover 130, and the top cover 140 may cover the part of the power distribution module extending out of the operation window 133. The height of the power distribution module is relatively high, and the part of the power distribution module extending out of the upper cover 130 may be covered by the top cover 140, so that the top cover 140 can protect the power distribution module. To reduce or avoid external water stains, stains, etc. from entering the power distribution module, and prevent external stains from entering the power distribution module and causing damage to the power distribution module, which helps to improve the reliability and stability of the power distribution module during operation.

[0110] Continue to refer to Figure 3 As shown, a lead wire opening 141 may be opened on the top cover 140. The wire in the power distribution module may be led out through the lead wire opening 141. For example, the weak wire in the power distribution module may be led out through the lead wire opening 141 to be electrically connected to an external electrical device.

[0111] Continue to refer to Figure 3 As shown, the top cover 140 may include a second flange 142. The second flange 142 may surround the top cover 140, and the second flange 142 may be connected to the upper cover 130. The top cover 140 may be connected to the upper cover 130 through the second flange 142. For example, the second flange 142 and the upper cover 130 may be connected by bolt fasteners. For example, studs may be welded on the upper cover 130, and through holes matching the studs may be provided on the second flange 142. The studs may pass through the through holes on the second flange 142, and nuts may be screwed onto the studs so that the second flange 142 and the upper cover 130 can be connected through the cooperation of the nuts and the studs.

[0112] The second flange 142 may facilitate the connection operation between the top cover 140 and the upper cover 130, and may improve the assembly efficiency between the upper cover 130 and the top cover 140. The bolt connection has simple operation and reliable connection, and can effectively improve the reliability and stability of the connection between the top cover 140 and the upper cover 130.

[0113] Wherein, the distance between two adjacent through holes on the second flange 142 may be 60 mm to 100 mm. For example, the distance between two adjacent through holes on the second flange 142 may be 60 mm, 70 mm, 85 mm, 90 mm, 100 mm, etc. Correspondingly, the distance between two adjacent studs on the upper cover 130 is the same as the distance of the through holes. The above through hole distance can make the connection between the top cover 140 and the upper cover 130 more reliable and stable, can effectively reduce or avoid large gaps between the second flange 142 and the upper cover 130, and helps to improve the sealing performance and reliability of the connection between the top cover 140 and the upper cover 130.

[0114] The second flange 142 may further include a second flanging structure 143. The second flanging structure 143 may be located at the outer edge of the second flange 142. The second flanging structure 143 may improve the structural strength and stiffness of the second flange 142, help to improve the overall structural stability of the second flange 142, and thus effectively enhance the reliability and stability of the connection between the top cover 140 and the upper cover 130. Moreover, it can also improve the impact resistance of the top cover 140, help to improve the sealing performance between the top cover 140 and the upper cover 130, reduce or avoid external water and liquid from entering the power distribution module through the gap between the second flange 142 and the upper cover 130, and thus effectively improve the protection effect on the power distribution module.

[0115] Wherein, a sealing ring may be provided between the top cover 140 and the upper cover 130. The sealing ring may be located between the second flange 142 and the upper cover 130. The sealing ring can play a sealing role between the top cover 140 and the upper cover 130, and can effectively reduce or avoid external water and liquid from entering the power distribution module through the gap between the second flange 142 and the upper cover 130, preventing the power distribution module from being damaged due to water ingress, and can effectively improve the protection effect on the power distribution module.

[0116] The top cover 140 may also have a gasket. The gasket may be sleeved on the stud, and the gasket may be located between the nut and the second flange 142. The gasket can protect the second flange 142 to avoid the nut directly acting on the second flange 142 and causing extrusion damage to the second flange 142, which helps to improve the protection of the second flange 142 and extend the service life of the second flange 142.

[0117] Wherein, the bottom plate 111 of the lower housing 110 may be a liquid cooling plate. The liquid cooling plate may include a plurality of cooling tubes, and the cooling tubes may have a coolant therein. The cooling tubes may have a liquid inlet and a liquid outlet, and the coolant may flow into the cooling tubes from the liquid inlet and flow out from the liquid outlet. During the process of the coolant flowing in the cooling tubes, heat exchange can occur between the coolant and the battery cell module 120 to cool down the battery cell module 120. The temperature of the battery cell module 120 during operation can be reduced to reduce or avoid the occurrence of high temperature conditions during the operation of the battery cell module 120, which may lead to safety accidents, and helps to improve the safety of the battery pack 100.

[0118] Figure 5 It is a schematic structural diagram of a bottom guard plate provided by an embodiment of the present application.

[0119] See Figure 5 As shown, the battery pack 100 may further include a bottom guard plate 150. Combining Figure 3 As shown, the bottom guard plate 150 may be connected to the bottom plate 111 of the lower housing 110, and the bottom guard plate 150 may be located on the side of the bottom plate 111 facing away from the first accommodation cavity 113. For example, the bottom guard plate 150 may be located on the side of the lower housing 110 facing away from the upper cover 130 and connected to the bottom plate 111 of the lower housing 110. For example, the bottom guard plate 150 and the bottom plate 111 of the lower housing 110 may be connected by bolts. The bottom guard plate 150 can provide protection for the lower housing 110 of the battery pack 100 to reduce or avoid the lower housing 110 of the battery pack 100 from being knocked or scratched, preventing the lower housing 110 from being knocked and causing damage to the battery, which helps to improve the protection of the battery pack 100 and extend the service life of the battery pack 100.

[0120] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 utility model.

[0121] In the description of the present utility model, it should be understood that the terms "comprising" and "having" used herein and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device 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 devices.

[0122] Unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, which can be the connection inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model 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 recorded in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A battery pack, characterized in that: include: The lower housing (110) comprises a bottom plate (111) and a first side beam (112) arranged around the bottom plate (111), wherein the bottom plate (111) and the first side beam (112) are arranged to form a first accommodating cavity (113); The battery cell module (120) is located in the first accommodating cavity (113), and along the height direction of the battery pack, part of the side surface of the battery cell module (120) is higher than the top end surface of the first side beam (112).

2. The battery pack according to claim 1, characterized in that: Along the height direction of the battery pack, the height of the battery cell module (120) is h, the side height of the battery cell module (120) above the top end surface of the first side beam (112) is G, and 5% h≤G≤50% h.

3. The battery pack according to claim 1, characterized in that: The first accommodating cavity (113) comprises a sub-cavity (1131) and a buffer cavity (1132) separated from each other, and the battery cell module (120) is located in the sub-cavity (1131); The buffer cavity (1132) is provided at at least one end of the sub-cavity (1131) along the first direction.

4. The battery pack according to claim 3, characterized in that: Also includes: an intermediate beam component (114), located in the first accommodating cavity (113), the intermediate beam component (114) dividing the first accommodating cavity (113) into the sub-cavity (1131) and the buffer cavity (1132); Along the height direction of the battery pack, the top end surface of the middle beam assembly (114) is flush with the top end surface of the battery cell module (120).

5. The battery pack according to claim 4, characterized in that: The intermediate beam assembly (114) comprises: A longitudinal beam (1141), the longitudinal beam (1141) extending in the first accommodating cavity (113) along a first direction; A cross beam (1142), the cross beam (1142) intersecting with the longitudinal beam (1141), and the cross beam (1142) extending in the first accommodating cavity (113) along a second direction; The cross beam (1142) and a portion of the first side beam (112) enclose the buffer cavity (1132); The longitudinal beam (1141), the transverse beam (1142) and parts of the first side beam (112) enclose a plurality of sub-cavities (1131).

6. The battery pack according to claim 5, characterized in that: A reinforcement member (115) is provided in each buffer cavity (1132), wherein the reinforcement member (115) extends along a first direction, and one end of the reinforcement member (115) is connected to the cross beam (1142), and the other end is connected to the first side beam (112).

7. The battery pack according to any one of claims 1 to 6, characterized in that: Also includes: A protection beam (116) is provided on the outer surface of at least one end of the lower shell (110) along the second direction.

8. The battery pack according to any one of claims 3 to 6, characterized in that: Also includes: An upper cover (130) is disposed on the lower shell (110) and connected to the first side beam (112), and the upper cover (130) has a second accommodating cavity; The portion of the battery cell module (120) that is higher than the top end surface of the first side beam (112) is located in the second accommodating cavity.

9. The battery pack according to claim 8, characterized in that: The upper cover (130) comprises a top plate (131) and a second side beam (132) arranged around the top plate (131), wherein the top plate (131) and the second side beam (132) are arranged around to form a second accommodating cavity; the second side beam (132) is connected to the first side beam (112); Furthermore, the second side beam (132) is arranged around a portion of the side surface of the battery cell module (120) that protrudes from the first accommodating cavity (113).

10. The battery pack according to claim 9, characterized in that: A power distribution module is disposed in one of the buffer chambers (1132), and the power distribution module is electrically connected to the battery core module (120); An operation window (133) is provided at a position of the upper cover (130) opposite to the power distribution module, and a portion of the power distribution module extends out of the operation window (133).

11. The battery pack according to claim 10, characterized in that: It also includes a top cover (140), the top cover (140) is covered on the upper cover (130), and the top cover (140) covers the portion of the power distribution module that extends out of the operation window (133); The top cover (140) is provided with a lead-in opening (141), and the conductive wires in the power distribution module are led outward through the lead-in opening (141).

12. The battery pack according to any one of claims 1 to 6, characterized in that: It also includes a connecting piece, through which the respective battery cell modules (120) are electrically connected, and the connecting piece is located on a portion of the side surface of the battery cell module (120) that is higher than the top end surface of the first side beam (112).

13. The battery pack according to any one of claims 1 to 6, characterized in that: The bottom plate (111) is a liquid cooling plate, and the liquid cooling plate comprises a plurality of cooling tubes, wherein the cooling tubes contain cooling liquid.

14. The battery pack according to any one of claims 1 to 6, characterized in that: It also includes a bottom guard plate (150), the bottom guard plate (150) is connected to the bottom plate (111) of the lower shell (110), and the bottom guard plate (150) is located on a side of the bottom plate (111) that is away from the first accommodating cavity (113).

15. The battery pack according to any one of claims 1 to 6, characterized in that: The first side beam (112) is provided with an exhaust hole (1121), and the first accommodating cavity (113) is connected to the outside through the exhaust hole (1121); It also includes an explosion-proof valve (1122), wherein the explosion-proof valve (1122) is plugged in the exhaust hole (1121).

16. The battery pack according to claim 9, characterized in that: The upper cover (130) further includes: A first flange (134), wherein the first flange (134) is disposed around the second side beam (132), the first flange (134) is connected to the first side beam (112), and the second side beam (132) is connected to the first side beam (112) via the first flange (134).

17. The battery pack according to claim 16, characterized in that: The first flange (134) comprises a first flange structure (135), and the first flange structure (135) is located at the outer edge of the first flange (134).

18. The battery pack according to claim 11, characterized in that: The top cover (140) further includes: A second flange (142), wherein the second flange (142) is disposed around the top cover (140), the second flange (142) is connected to the upper cover (130), and the top cover (140) is connected to the upper cover (130) via the second flange (142).

19. The battery pack according to claim 18, characterized in that: The second flange (142) comprises a second flange structure (143), and the second flange structure (143) is located at the edge of the second flange (142).

20. An electrical equipment, characterized in that: It comprises a vehicle body and a battery pack as described in any one of claims 1 to 19, wherein the battery pack is mounted on the vehicle body.

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