Battery pack and vehicle

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack and a vehicle. A battery pack comprises a first shell and a second shell which are correspondingly arranged, and the first shell and the second shell form a sealed accommodating space; the at least two combined mold assemblies are arranged in the containing space, the at least two combined mold assemblies are stacked in the height direction, and the adjacent combined mold assemblies are detachably connected; and the liquid cooling assembly comprises at least one first liquid cooling plate which is arranged in the accommodating space, the first liquid cooling plate is arranged between the adjacent combined module assemblies, and the first liquid cooling plate is detachably connected with the adjacent combined module assemblies. The utility model provides a battery pack and a vehicle, and aims to solve the problem that the overall structural strength is insufficient due to the fact that a battery module is usually designed into two layers or multiple layers but cannot be connected with a liquid cooling plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery pack and vehicle. BACKGROUND

[0002] The vehicle-mounted battery pack is mainly composed of a box body, a box cover, a battery, electrical components, a thermal management system and other main parts, in recent years, with the rapid development of the electric vehicle industry in China, people have higher requirements for long endurance, charging rate and battery pack safety, so the battery pack needs to have higher power, more efficient thermal management system and stronger structural performance.

[0003] To meet user demand, the battery module in the existing battery pack is often designed as two layers or more, but the battery module and the liquid cooling plate cannot be connected, resulting in insufficient overall structural strength. UTILITY MODEL CONTENTS

[0004] Therefore, the utility model provides a battery pack and vehicle to solve the problem that the battery module is often designed as two layers or more, but the battery module and the liquid cooling plate cannot be connected, resulting in insufficient overall structural strength.

[0005] In a first aspect, the utility model provides a battery pack, which comprises:

[0006] Correspondingly arranged first shell and second shell, the first shell and the second shell form a sealed containing space;

[0007] At least two combined module assemblies are arranged in the containing space, and the at least two combined module assemblies are arranged in a stacking mode along the height direction, and the adjacent combined module assemblies are detachably connected;

[0008] The liquid cooling assembly comprises at least one first liquid cooling plate arranged in the containing space, and the first liquid cooling plate is arranged between the adjacent combined module assemblies and detachably connected with the adjacent combined module assemblies.

[0009] The first liquid cooling plate and the adjacent combined module assemblies are detachably connected, so that the first liquid cooling plate and the adjacent combined module assemblies are fixed in the use state, realizing two-in-one, improving the overall torsional and vibration resistance, and improving the overall structural strength while improving the containing capacity in the containing space.

[0010] In an optional embodiment, the adjacent combined module assemblies are fixedly connected through a first fastening rod, and the first fastening rod passes through the first liquid cooling plate.

[0011] In an alternative embodiment, each of the combined module assemblies comprises at least two battery modules, adjacent battery modules are connected by a connecting plate, both ends of the connecting plate are respectively provided with a second fastening rod, and the second fastening rod is used to fixedly connect the battery modules and the connecting plate.

[0012] In an alternative embodiment, the first liquid cooling plate comprises a first surface and a second surface, the first surface and the second surface are arranged on both sides of the first liquid cooling plate, the first surface is provided with a first torsion-resistant cross beam, the side surface of the first liquid cooling plate is provided with a support foot end, the support foot end extends in a direction away from the first surface, the support foot end is provided with a second through hole, and the first fastening rod is arranged through the second through hole.

[0013] In an alternative embodiment, the inner side wall of the first shell is provided with a longitudinal beam, the longitudinal beam is provided with a fastening hole, the fastening hole is arranged corresponding to the second through hole, and the first fastening rod is threadedly connected with the fastening hole.

[0014] In an alternative embodiment, the inner side wall of the first shell is further provided with a second torsion-resistant cross beam, the longitudinal beam and the second torsion-resistant cross beam are connected in a head-tail mode to be fixedly connected along the inner side wall of the first shell, and the longitudinal beam and the second torsion-resistant cross beam are arranged perpendicularly.

[0015] In an alternative embodiment, the first shell is further provided with a third torsion-resistant cross beam, the third torsion-resistant cross beam is fixedly connected with the first shell through a fastener, and the third torsion-resistant cross beam is arranged perpendicularly to the longitudinal beam.

[0016] In an alternative embodiment, the liquid cooling assembly further comprises a second liquid cooling plate, the third torsion-resistant cross beam is provided with the second liquid cooling plate between the first shell, and the third torsion-resistant cross beam fixes the second liquid cooling plate in the first shell through a fastener.

[0017] In an alternative embodiment, the outer surfaces of the four side walls of the first shell are respectively provided with at least one lifting lug, and the side walls of the first shell are further provided with a high-voltage plug connector, a liquid inlet and outlet member and a high-voltage connector.

[0018] In a second aspect, the utility model further provides a vehicle comprising the above-mentioned battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the description of the specific embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings described in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 An explosion schematic diagram of a battery pack of the embodiment of the present application;

[0021] Figure 2 A schematic diagram of a battery pack of the embodiment of the present application;

[0022] Figure 3 A schematic diagram of a combined module assembly of the embodiment of the present application;

[0023] Figure 4 A Figure 3 A local enlarged schematic diagram of A in the middle;

[0024] Figure 5 A schematic diagram of a first liquid cooling plate of the embodiment of the present application;

[0025] Figure 6 A Figure 5 A cross-sectional schematic diagram of B-B in the middle;

[0026] Figure 7 A schematic diagram of a first shell of the embodiment of the present application;

[0027] Figure 8 A Figure 7 A cross-sectional schematic diagram of C in the middle;

[0028] Figure 9 A schematic diagram of a third cross beam of the embodiment of the present application;

[0029] Figure 10 A Figure 9 A cross-sectional schematic diagram of D in the middle.

[0030] Explanation of reference signs: 1, first shell; 101, lifting lug; 102, high-voltage connector; 103, liquid inlet and outlet; 104, high-voltage connector; 105, longitudinal beam; 106, second torsion-resistant cross beam; 107, third torsion-resistant cross beam; 2, second shell; 3, sealing foam; 4, combined module assembly; 401, first battery module; 402, second battery module; 403, third battery module; 404, side end plate; 405, first fastening rod; 406, connecting plate; 4061, flange wall; 407, second fastening rod; 408, containing gap; 5, liquid cooling assembly; 501, first liquid cooling plate; 5011, first surface; 5012, first torsion-resistant cross beam; 5013, support foot end; 5014, second through hole; 5015, liquid inlet port; 5016, liquid outlet port; 5017, cooling liquid flow channel; 502, second liquid cooling plate. DETAILED DESCRIPTION

[0031] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] The embodiments of the present application will be described below with reference to Figures 1 to 10

[0033] According to the embodiments of the present application, on the one hand, a battery pack is provided, which comprises: a first shell 1 and a second shell 2 arranged correspondingly, the first shell 1 and the second shell 2 form a sealed containing space;

[0034] At least two combined module assemblies 4 are arranged in the containing space, the at least two combined module assemblies 4 are arranged in a stacking manner along a height direction, and adjacent combined module assemblies 4 are detachably connected.

[0035] A liquid cooling assembly 5 is arranged in the containing space, and the liquid cooling assembly 5 comprises at least one first liquid cooling plate 501, the first liquid cooling plate 501 is arranged between adjacent combined module assemblies 4, and the first liquid cooling plate 501 is detachably connected with the adjacent combined module assemblies 4.

[0036] The first liquid cooling plate 501 is detachably connected with the adjacent combined module assemblies 4, so that the first liquid cooling plate 501 and the adjacent combined module assemblies 4 are fixed in the use state, the two-in-one is realized, the overall torsion resistance and vibration resistance are improved, the containing capacity in the containing space is increased, and the overall structural strength is also improved.

[0037] ​In one embodiment, as shown in Figure 1 , Figure 3 and Figure 4 , the adjacent combined module assemblies 4 are fixedly connected by first fastening rods 405, the first fastening rods 405 are arranged through the first liquid cooling plates 501, and the connection of the adjacent combined module assemblies 4 is realized by the first fastening rods 405, which facilitates the detachable connection. Specifically, the first fastening rods 405 are bolt rods.

[0038] In one embodiment, as shown in Figure 1 , Figure 3 and Figure 4 , each combined module assembly 4 includes at least two battery modules, and the adjacent battery modules are connected by a connecting plate 406, both ends of the connecting plate 406 are provided with a second fastening rod 407, and the second fastening rod 407 is used to fixedly connect the battery modules and the connecting plate 406. Two adjacent battery modules form a combined module assembly 4 through the connecting plate 406 and the second fastening rod 407, thereby forming a whole, which has stronger anti-vibration and anti-bending ability. It should be noted that, as shown in Figure 4 , the connecting plate 406 is provided with a flange wall 4061 on the side surface, and a wire harness buckle mounting hole is arranged through the flange wall 4061, which increases the strength and makes the connecting plate 406 have multiple functions. In this embodiment, the number of battery modules is three, i.e., the first battery module 401, the second battery module 402 and the third battery module 403, the first battery module 401 and the second battery module 402 are fixedly connected by the connecting plate 406, and the second battery module 402 and the third battery module 403 are fixedly connected by the connecting plate 406. It should be noted that the size, specification and other parameters of the first battery module 401, the second battery module 402 and the third battery module 403 are completely the same.

[0039] In this embodiment, as shown in Figure 3 , each battery module is provided with a side end plate 404 on each of the two sides arranged transversely, the side end plate 404 is fixedly connected with the battery module, the side end plate 404 is provided with a first through hole, and the first fastening rod 405 is arranged to pass through the first through hole. It should be noted that two first through holes are arranged on each side end plate 404, one first fastening rod 405 is arranged in each first through hole, and the first fastening rods 405 on both sides of the same battery module are symmetrically arranged to maintain the appearance. In this embodiment, as shown in Figure 4 , the accommodating gaps 408 are arranged between the adjacent battery modules, and the accommodating gaps 408 are arranged to facilitate the heat dissipation of the battery modules, so that the heat emitted by the battery modules is not transmitted to the adjacent battery modules.

[0040] In one embodiment, as shown in Figure 1 , Figure 5As shown, the first liquid cooling plate 501 includes a first surface 5011 and a second surface, the first surface 5011 and the second surface are arranged on both sides of the first liquid cooling plate 501, the first surface 5011 is provided with a first torsion beam 5012, and the side surface of the first liquid cooling plate 501 is provided with a support foot end 5013, the support foot end 5013 extends towards the direction away from the first surface 5011, the support foot end 5013 is provided with a through hole, and the first fastening rod 405 is arranged through the through hole. In the embodiment, as shown in Figure 5 As shown, the first torsion beam 5012 is hollow to reduce its own weight, and the first torsion beam 5012 is just clamped in the accommodating gap 408, and the side surface of the first torsion beam 5012 is arranged in close contact with the side wall of the battery module, so as to limit the arbitrary movement of the combined module assembly 4. The first liquid cooling plate 501 reduces the heat of the adjacent combined module assembly 4 to carry away the heat generated by the battery module assembly. When the support foot end 5013 is provided with a second through hole 5014, the first fastener passes through the second through hole 5014 to realize the detachable connection of the first liquid cooling plate 501 and the two adjacent combined module assemblies 4, realize the integrated installation and use, and can be used separately after disassembly.

[0041] In the embodiment, as shown in Figure 5 The two sides of the first liquid cooling plate 501 are respectively provided with three support foot ends 5013, that is, the number of support foot ends 5013 on one side is three, one support foot end 5013 is provided with two second through holes 5014, and one first through hole and one second through hole 5014 are arranged in correspondence and have the same diameter. As shown in Figure 6 The first liquid cooling plate 501 is provided with a plurality of cooling liquid flow channels 5017, the adjacent cooling liquid flow channels 5017 are arranged in communication, and the first surface 5011 of the first liquid cooling plate 501 is provided with an inlet port 5015 and an outlet port 5016, so that the cooling liquid enters the inlet port 5015, flows out of the outlet port 5016 through the cooling liquid flow channel 5017, and carries away the heat in the cycle.

[0042] In one embodiment, as shown in Figure 1 , Figure 7 The inner side wall of the first shell 1 is provided with a longitudinal beam 105, the longitudinal beam 105 is provided with a fastening hole, the fastening hole is arranged in correspondence with the second through hole 5014, and the first fastening rod 405 is threadedly connected with the fastening hole. The first fastening rod 405 and the longitudinal beam 105 are connected by threads to integrally connect the first shell 1, the first liquid cooling plate 501 and the combined module assembly 4, so that the shell and the parts in the shell are integrally arranged, and the overall strength is improved.

[0043] In one embodiment, as shown in Figure 1 , Figure 7As shown, the inner side wall of the first shell 1 is further provided with a second torsion beam 106, the longitudinal beam 105 and the second torsion beam 106 are connected at the head and tail to be fixedly connected along the inner side wall of the first shell 1, and the longitudinal beam 105 is arranged perpendicularly to the second torsion beam 106. A stable frame for reinforcing the first shell 1 is formed by the longitudinal beam 105 and the second torsion beam 106, and the overall strength is increased. In this embodiment, the longitudinal beam 105 and the second torsion beam 106 are fixedly connected with the first shell 1, that is, the longitudinal beam 105 and the second torsion beam 106 are integrally formed with the first shell 1 by spot welding, thereby forming a stable frame structure.

[0044] In one embodiment, as shown in Figure 1 , Figure 7 , Figure 9 and Figure 10 , the first shell 1 is further provided with a third torsion beam 107, the third torsion beam 107 is fixedly connected with the first shell 1 by fasteners, and the third torsion beam 107 is arranged perpendicularly to the longitudinal beam 105. The third torsion beam 107 further enhances the structural strength, and the second torsion beam 106, the third torsion beam 107 and the longitudinal beam 105 form a "eye" shape, effectively increasing the structural strength of the first shell 1. It should be noted that the third torsion beam 107 is located in the accommodation gap 408, and the side surface of the third torsion beam 107 is arranged in close contact with the side surface of the battery module, so as to limit the arbitrary movement of the combined module assembly 4.

[0045] In one embodiment, as shown in Figure 1 , the liquid cooling assembly 5 further comprises a second liquid cooling plate 502, the third torsion beam 107 is provided with the second liquid cooling plate 502 between the first shell 1, and the third torsion beam 107 fixes the second liquid cooling plate 502 in the first shell 1 by fasteners. The second liquid cooling plate 502 is provided to further reduce the heat in the accommodation space.

[0046] In one embodiment, as shown in Figure 1 , Figure 2 , Figure 7 and Figure 8 , two lifting lugs 101 are respectively arranged on the outer surfaces of the four side walls of the first shell 1, and high-voltage plug-in connectors 102, liquid inlet and outlet connectors 103 and high-voltage connectors 104 are further arranged on the side walls of the first shell 1. The four side walls are respectively provided with lifting lugs 101 to facilitate hoisting, the liquid inlet and outlet connectors 103 are communicated with the liquid inlet port 5015 of the second liquid cooling plate 502, the first liquid cooling plate 501 and the liquid outlet port 5016 of the first liquid cooling plate 501 through pipelines to facilitate the entry and exit of the cooling liquid, and the high-voltage plug-in connectors 102 and the high-voltage connectors 104 are respectively connected with each battery module through lines. In addition, sealing foam 3 is filled at the end surface connection between the first shell 1 and the second shell 2 to play a sealing and damping role.

[0047] According to the embodiment of the utility model, on the other hand, a vehicle is also provided, comprising the battery pack.

[0048] In actual working process, in use state, adjacent combination module assembly 4 of same layer is fixedly connected through connecting plate 406, and is sequentially passed through the combination module assembly 4 of upper layer, first liquid cooling plate 501, the combination module assembly 4 of lower layer, the fastening hole of longitudinal beam 105 from top to bottom through first fastening rod 405, finally makes combination module assembly 4, first liquid cooling plate 501 and first shell 1 fixed as a whole, to improve the overall structural strength, and sealing foam 3 is filled in the end face connecting place of first shell 1 and second shell 2 again;When disassembling, first shell 1 is separated with second shell 2 first, and the combination module assembly 4 of upper layer, first liquid cooling plate 501, the combination module assembly 4 of lower layer, longitudinal beam 105 are separated by disassembling first fastening rod 405, and adjacent battery module of same layer is separated by disassembling second fastening rod 407 again.

[0049] The battery pack has the following advantages: (1) the accommodating space formed by the first shell 1 and the second shell 2 is fully utilized, at least two combination module assemblies 4 are arranged in the accommodating space along the height direction, and the capacity of the battery pack is effectively improved; (2) the first liquid cooling plate 501 and the second liquid cooling plate 502 are arranged, and high-efficiency thermal management capability is provided for the battery pack; (3) the adjacent battery modules of the same layer are connected through the connecting plate 406, and the combination module assembly 4 formed by the adjacent battery modules has stronger torsion resistance and vibration resistance; (4) the second liquid cooling plate 502 is detachably connected with the first shell 1 through the third torsion-resistant cross beam 107, and the integrated design of the second liquid cooling plate 502 in the first shell 1 is realized; (5) the combination module assembly 4 and the first liquid cooling plate 501 are detachably connected through the first fastening rod 405, the overall strength and the bending resistance of the accommodating space are improved, and the first liquid cooling plate 501 and the combination module assembly 4 are combined into one; (6) the whole device is convenient to disassemble and assemble, and the structure is relatively simple and the layout is regular.

[0050] As an alternative embodiment, the longitudinal beam 105 and the second torsion-resistant cross beam 106 are integrally combined with the first shell 1 through clamping, threaded connection or other ways, and form a stable frame structure.

[0051] As an alternative embodiment, the number of battery modules of one combination module assembly 4 can also be 2, 4, 5 or more.

[0052] Although the embodiments of the utility model are described in combination with the drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery pack, characterized by, The application relates to a liquid-cooled battery module. The application comprises: a first shell (1) and a second shell (2) arranged correspondingly, the first shell (1) and the second shell (2) forming a sealed containing space; at least two combined module assemblies (4) arranged in the containing space, the at least two combined module assemblies (4) being arranged in a stacking mode along a height direction, and adjacent combined module assemblies (4) being detachably connected; 2. The battery pack of claim 1, wherein, a liquid cooling assembly (5) comprising at least one first liquid cooling plate (501) arranged in the containing space, the first liquid cooling plate (501) being arranged between adjacent combined module assemblies (4) and being detachably connected with the adjacent combined module assemblies (4).

3. The battery pack of claim 2, wherein, The adjacent combined module assemblies (4) are fixedly connected through a first fastening rod (405), and the first fastening rod (405) is arranged through the first liquid cooling plate (501).

4. The battery pack of claim 2, wherein, Each combined module assembly (4) comprises at least two battery modules, adjacent battery modules are connected through a connecting plate (406), and two ends of the connecting plate (406) are respectively provided with a second fastening rod (407), and the second fastening rod (407) is used for fixedly connecting the battery modules and the connecting plate (406).

5. The battery pack of claim 4, wherein, The first liquid cooling plate (501) comprises a first surface (5011) and a second surface, the first surface (5011) and the second surface are arranged on two sides of the first liquid cooling plate (501), a first anti-torsion cross beam (5012) is arranged on the first surface (5011), a support foot end (5013) is arranged on a side surface of the first liquid cooling plate (501), the support foot end (5013) extends towards a direction away from the first surface (5011), the support foot end (5013) is provided with a second through hole (5014), and the first fastening rod (405) is arranged through the second through hole (5014).

6. The battery pack of claim 5, wherein, A longitudinal beam (105) is arranged on an inner side wall of the first shell (1), the longitudinal beam (105) is provided with a fastening hole, the fastening hole is arranged correspondingly with the second through hole (5014), and the first fastening rod (405) is screw-connected with the fastening hole.

7. The battery pack of claim 6, wherein, A second anti-torsion cross beam (106) is further arranged on the inner side wall of the first shell (1), the longitudinal beam (105) and the second anti-torsion cross beam (106) are connected at the head and tail to be fixedly connected along the inner side wall of the first shell (1), and the longitudinal beam (105) and the second anti-torsion cross beam (106) are arranged perpendicularly.

8. The battery pack of claim 7, wherein, A third anti-torsion cross beam (107) is further arranged in the first shell (1), the third anti-torsion cross beam (107) is fixedly connected with the first shell (1) through a fastener, and the third anti-torsion cross beam (107) is arranged perpendicularly with the longitudinal beam (105). The liquid cooling assembly (5) further comprises a second liquid cooling plate (502), the second liquid cooling plate (502) is arranged between the third anti-torsion cross beam (107) and the first shell (1), and the third anti-torsion cross beam (107) fixes the second liquid cooling plate (502) in the first shell (1) through the fastener.

9. The battery pack of claim 8, wherein, At least one lug (101) is arranged on the outer surface of each of the four side walls of the first shell (1), and a high-voltage plug (102), a liquid inlet / outlet (103) and a high-voltage connector (104) are further arranged on the side walls of the first shell (1).

10. A vehicle characterized by comprising: A battery pack comprising the battery pack of any one of claims 1-9.

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