Battery case and battery pack

Abstract

A battery case and a battery pack. The battery case in the battery pack comprises a case frame (100), a liquid cooling plate (200), a protective plate (300), a plurality of fixed connection assemblies, a first-layer sealing assembly (400) and a second-layer sealing assembly (500), wherein the case frame (100), the liquid cooling plate (200) and the protective plate (300) are stacked in sequence; at least some of the fixed connection assemblies are arranged at the edge of the protective plate (300) at intervals, so as to fixedly connect the protective plate (300), the liquid cooling plate (200) and the case frame (100); the first-layer sealing assembly (400) is located between the liquid cooling plate (200) and the case frame (100), with at least part of the first-layer sealing assembly (400) surrounding the edge of the liquid cooling plate (200); and the second-layer sealing assembly (500) is located between the protective plate (300) and the liquid cooling plate (200), with at least part of the second-layer sealing assembly (500) surrounding the edge of the protective plate (300). The sealing and fixation between the case frame (100) and the liquid cooling plate (200) and the sealing and fixation between the liquid cooling plate (200) and the protective plate (300) are realized; the structure is compact; and the sealing effect is good, thereby improving the protection of batteries in the battery case.

Description

Battery box and battery pack

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 8, 2024, with application number 202421923907.0. The entire contents of the above application are incorporated by reference into this application.

[0002] Technical Field

[0003] The present application relates to the field of battery technology, for example, to battery boxes and battery packs.

[0004] Background Art

[0005] The battery pack is a crucial component in electric vehicles, providing them with power. It consists of a battery case and multiple batteries, which are arranged in series and / or parallel within the case. The battery case comprises, from top to bottom, a frame, a liquid cooling plate, and a bottom shield. The batteries are housed within the housing enclosed by the frame. The liquid cooling plate dissipates heat from the batteries within the housing, while the bottom shield protects the plate.

[0006] In the related art, the bottom guard plate is welded and fixed to the liquid cooling plate by means of stir friction welding.

[0007] Technical issues

[0008] In actual application scenarios, due to the poor welding quality between the bottom guard plate and the liquid cooling plate, welding failure is prone to occur between the bottom guard plate and the liquid cooling plate, causing sewage or other foreign matter to flow along the weld between the liquid cooling plate and the bottom guard plate, resulting in damage to the liquid cooling plate. In addition, the box frame and the liquid cooling plate are connected together with bolts and nuts, and sewage or other foreign matter can easily flow into the batteries inside the box frame along the gap between the box frame and the liquid cooling plate, causing damage to the batteries. The sealing effect between the box frame and the liquid cooling plate, as well as the sealing effect between the liquid cooling plate and the bottom guard plate, are both poor, greatly affecting the service life and safety of the battery pack.

[0009] Technical Solutions

[0010] The present application provides a battery box, comprising:

[0011] The box frame, liquid cooling plate and protective plate are stacked in sequence;

[0012] A plurality of fixed connection components, at least some of which are spaced apart at the edge of the protection plate to fixedly connect the protection plate, the liquid cooling plate and the box frame;

[0013] A first sealing assembly is located between the liquid cooling plate and the box frame, and at least a portion of the first sealing assembly is disposed around an edge of the liquid cooling plate;

[0014] The second sealing component is located between the protection plate and the liquid cooling plate, and at least a portion of the second sealing component is arranged around the edge of the protection plate.

[0015] The present application also provides a battery pack, comprising a plurality of batteries and a battery box, wherein the plurality of batteries are interconnected in at least one of series connection and parallel connection, and the plurality of batteries are housed in the battery box.

[0016] Beneficial effects

[0017] Beneficial effects of this application:

[0018] The battery box provided by the present application is capable of supporting, cooling and protecting the battery by stacking the box frame, the liquid cooling plate and the protective plate in sequence, and setting multiple sets of fixed connection components to connect and fix the protective plate, the liquid cooling plate and the box frame. By setting a first layer of sealing components between the liquid cooling plate and the box frame, so that at least part of the first layer of sealing components is arranged around the edge of the liquid cooling plate, the gap between the liquid cooling plate and the box frame can be effectively sealed. By setting a second layer of sealing components between the protective plate and the liquid cooling plate, so that at least part of the second layer of sealing components is arranged around the edge of the protective plate, the protective plate can be effectively sealed. The effective sealing of the gap between the plate and the liquid cooling plate enables the box frame, the first layer sealing assembly, the liquid cooling plate, the second layer sealing assembly and the protective plate in the battery box to be stacked and fixed in sequence, with a compact structure. Combined with the sealing of the gap between the liquid cooling plate and the box frame by the first layer sealing assembly, and the sealing of the gap between the liquid cooling plate and the protective plate by the second layer sealing assembly, the battery box is sealed with a good sealing effect, which effectively prevents sewage or other foreign matter from entering the battery box along the gap between the liquid cooling plate and the box frame or the gap between the liquid cooling plate and the protective plate, thereby improving the protection of the battery box and the batteries in the battery box.

[0019] The present application also provides a battery pack, which, through the use of a battery box, achieves effective sealing and fixation of the box frame and the liquid cooling plate, as well as effective sealing and fixation of the liquid cooling plate and the protective plate. It has a compact structure and good sealing effect, and can effectively prevent sewage or other foreign matter from entering the battery box along the gap between the liquid cooling plate and the box frame or the gap between the liquid cooling plate and the protective plate, thereby improving the protection of the battery box and the batteries inside the battery box.

[0020] BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is an axonometric view of a battery box provided by some implementations of the present application;

[0022] FIG2 is an exploded view of a battery box provided by some implementations of the present application;

[0023] FIG3 is a cross-sectional schematic diagram of a battery box provided by some implementations of the present application;

[0024] FIG4 is a schematic structural diagram of a battery box with a hidden protective plate provided in some implementations of the present application;

[0025] FIG5 is a partial enlarged schematic diagram of point A in FIG3;

[0026] FIG6 is a partial enlarged schematic diagram of point B in FIG5;

[0027] FIG7 is a partial enlarged schematic diagram of point C in FIG5;

[0028] FIG8 is a partial enlarged schematic diagram of point D in FIG4 .

[0029] In the picture:

[0030] 1000, battery box;

[0031] 100, box frame; 110, frame structure; 111, recess; 112, storage cavity; 113, electrical cavity; 120, partition baffle; 130, support beam;

[0032] 200, liquid cooling plate; 210, liquid inlet pipe; 220, liquid outlet pipe;

[0033] 300, protection plate;

[0034] 400, first sealing assembly; 410, first sealing member; 420, second sealing member;

[0035] 500, second sealing assembly; 510, third sealing member; 520, supporting docking member; 521, annular mounting groove; 530, fourth sealing member;

[0036] 600, second fixed connection assembly; 610, first fixing member; 611, threaded hole; 620, second fixing member;

[0037] 700. First fixed connection component.

[0038] Modes for Carrying Out the Invention

[0039] As shown in Figures 1 to 8, this embodiment provides a battery case 1000. The battery case 1000 includes a case frame 100, a liquid cooling plate 200, a protective plate 300, multiple sets of fixed connection components, a first layer sealing component 400, and a second layer sealing component 500. The case frame 100, the liquid cooling plate 200, and the protective plate 300 are stacked in sequence, at least some of the fixed connection components are spaced apart at the edge of the protective plate 300 to fixedly connect the protective plate 300, the liquid cooling plate 200, and the case frame 100. The first layer sealing component 400 is located between the liquid cooling plate 200 and the case frame 100, at least part of the first layer sealing component 400 is disposed around the edge of the liquid cooling plate 200, the second layer sealing component 500 is located between the protective plate 300 and the liquid cooling plate 200, and at least part of the second layer sealing component 500 is disposed around the edge of the protective plate 300.

[0040] The battery box 1000 is stacked in sequence by the box frame 100, the liquid cooling plate 200 and the protective plate 300, and multiple sets of fixed connection components are provided to connect and fix the protective plate 300, the liquid cooling plate 200 and the box frame 100, so as to achieve support, cooling and protection of the battery. By providing a first layer of sealing component 400 between the liquid cooling plate 200 and the box frame 100, at least a portion of the first layer of sealing component 400 is arranged around the edge of the liquid cooling plate 200, so as to achieve effective sealing of the gap between the liquid cooling plate 200 and the box frame 100. By providing a second layer of sealing component 500 between the protective plate 300 and the liquid cooling plate 200, at least a portion of the second layer of sealing component 500 is arranged around the edge of the protective plate 300, so as to achieve effective sealing of the gap between the protective plate 300 and the liquid cooling plate 2 00, so that the box frame 100, the first layer sealing component 400, the liquid cooling plate 200, the second layer sealing component 500 and the protective plate 300 in the battery box 1000 are stacked and fixed in sequence, with a compact structure. Combined with the sealing of the gap between the liquid cooling plate 200 and the box frame 100 by the first layer sealing component 400, and the sealing of the gap between the liquid cooling plate 200 and the protective plate 300 by the second layer sealing component 500, the battery box 1000 is sealed, and the sealing effect is good, which effectively prevents sewage or other foreign matter from entering the battery box 1000 along the gap between the liquid cooling plate 200 and the box frame 100 or the gap between the liquid cooling plate 200 and the protective plate 300, thereby improving the protection of the battery box 1000 and the batteries in the battery box 1000.

[0041] In this embodiment, the protective plate 300, the liquid cooling plate 200, and the housing frame 100 are stacked sequentially from bottom to top to support the batteries within the battery housing 1000. In other embodiments, the stacking direction of the housing frame 100, the liquid cooling plate 200, and the protective plate 300 can be adjusted according to actual needs, and this embodiment does not specifically limit this.

[0042] As an optional solution, the box frame 100 includes a frame structure 110 and a partition baffle 120 fixedly connected to the frame structure 110, and multiple groups of fixed connection components include a first fixed connection component 700 and a second fixed connection component 600. Multiple first fixed connection components 700 are configured to fixedly connect the protective plate 300, the liquid cooling plate 200 and the frame structure 110, and multiple second fixed connection components 600 are configured to fixedly connect the protective plate 300, the liquid cooling plate 200 and the partition baffle 120. By splitting the box frame 100 into a frame structure 110 and a partition baffle 120 fixedly connected to the frame structure 110, the space within the frame structure 110 can be split into multiple independent partitions, which is convenient for subsequent battery storage. By using a first fixed connection component 700 to fix the protection plate 300, the liquid cooling plate 200 and the frame structure 110, and using multiple second fixed connection components 600 to fix the protection plate 300, the liquid cooling plate 200 and the partition baffle 120, the protection plate 300 and the liquid cooling plate 200 can be fixedly connected to the frame structure 110 and the partition baffle 120 respectively.

[0043] In this embodiment, the first fixing assembly 700 includes blind rivets, which are used to rivet the protective plate 300, the liquid cooling plate 200, and the frame structure 110. The second fixing assembly 600 also includes blind rivets, which are used to rivet the protective plate 300, the liquid cooling plate 200, and the partition baffle 120. Blind rivets and riveting principles known in related art can be used for riveting and fixing in this application.

[0044] The partition baffle 120 can divide the accommodating chamber within the enclosure structure 110 into at least two independent sub-chambers. The at least two sub-chambers each include at least one electrical chamber 113 and at least one storage chamber 112. The battery is accommodated in the storage chamber 112, and the wiring harness is accommodated in the electrical chamber 113. By separating the box frame 100 into the enclosure structure 110 and the partition baffle 120, the first fixed connection assembly 700 and the second fixed connection assembly 600 respectively connect and secure the enclosure structure 110 and the partition baffle 120 to the liquid cooling plate 200, ensuring a sealed and secure connection between the box frame 100 and the liquid cooling plate 200. By using the partition baffle 120 to divide the accommodating chamber within the enclosure structure 110 into at least two sub-chambers, the at least two sub-chambers each include at least one storage chamber 112 configured to store batteries and at least one electrical chamber 113 configured to accommodate the wiring harness, thereby ensuring safe storage of the batteries and wiring harness. In this embodiment, the accommodating cavity within the frame structure 110 is divided into one electrical cavity 113 and four storage cavities 112 by the partitioning baffle 120. In other embodiments, the specific number of electrical cavities 113 and storage cavities 112 can also be adjusted according to actual needs.

[0045] In addition, to improve space utilization, as shown in FIG1 , in this embodiment, the liquid inlet pipe 210 and the liquid outlet pipe 220 on the liquid cooling plate 200 are both accommodated in the electrical cavity 113 and communicate with the outside.

[0046] The frame structure 110 is made of steel, and the partition baffles 120 are made of aluminum, thus forming a box frame 100 structure that combines steel and aluminum. Using steel to form the frame structure 110 ensures its structural strength and prevents deformation under stress. Using aluminum to form the partition baffles 120 reduces the weight of the box frame 100, thereby meeting actual strength and installation requirements while reducing product weight and saving production costs.

[0047] To improve the structural strength of the electrical cavity 113, the box frame 100 also includes a support beam 130, wherein the support beam 130 is supported between the cavity walls of the electrical cavity 113 by welding and riveting. By providing the support beam 130 and supporting the support beam 130 between the cavity walls of the electrical cavity 113 by welding and riveting, the structural strength of the electrical cavity 113 is ensured, and the batteries in the storage cavity 112 are prevented from squeezing and damaging the electrical cavity 113 due to expansion. The support beam 130 is provided with a planar extension at each axial end. The planar extension is in contact with the cavity walls of the electrical cavity 113 and is fixed to the cavity walls of the electrical cavity 113 by welding or riveting.

[0048] In an optional embodiment, the first sealing assembly 400 includes a first sealing member 410, with a portion of the first sealing member 410 corresponding to the first fixed connection assembly 700, and the remaining portion of the first sealing member 410 corresponding to the second fixed connection assembly 600. By arranging a portion of the first sealing member 410 within the first sealing assembly 400 corresponding to the first fixed connection assembly 700 and the remaining portion of the first sealing member 410 within the first sealing assembly 400 corresponding to the second fixed connection assembly 600, the first sealing member 410 can simultaneously seal the enclosure structure 110 and the liquid cooling plate 200, as well as seal the partition baffle 120 and the liquid cooling plate 200.

[0049] The first fixed connection assembly 700 sequentially passes through the protective plate 300, the liquid cooling plate 200, and the first seal 410, and is then fixedly connected to the frame structure 110, thereby ensuring that the first seal 410 seals the liquid cooling plate 200 and the frame structure 110. The second fixed connection assembly 600 sequentially passes through the liquid cooling plate 200 and the first seal 410, and is then fixedly connected to the partition baffle 120, thereby ensuring that the first seal 410 seals the liquid cooling plate 200 and the partition baffle 120. In this embodiment, the first sealing member 410 is a rubber gasket, which has good elasticity, toughness and wear resistance and a long service life. When the first fixed connection component 700 fixes the liquid cooling plate 200 to the frame structure 110, or the second fixed connection component 600 fixes the liquid cooling plate 200 to the partition baffle 120, the rubber gasket can be compressed and clamped between the liquid cooling plate 200 and the frame structure 110 or between the liquid cooling plate 200 and the partition baffle 120, so that the rubber gasket is fully filled in the gap between the liquid cooling plate 200 and the frame structure 110 or between the liquid cooling plate 200 and the partition baffle 120, so as to achieve sealing between the liquid cooling plate 200 and the frame structure 110 or between the liquid cooling plate 200 and the partition baffle 120.

[0050] To enhance the sealing between the frame structure 110 and the liquid cooling plate 200, the first sealing assembly 400 further includes a second sealing member 420. The second sealing member 420 is annular and positioned between the liquid cooling plate 200 and the frame structure 110. The second sealing member 420 is also located within the annular area formed by all of the first fixed connection assemblies 700. By positioning the second sealing member 420 within the annular area formed by the first fixed connection assemblies 700 and between the liquid cooling plate 200 and the frame structure 110, an additional sealing structure is provided, in addition to the sealing provided by the first sealing member 410 between the liquid cooling plate 200 and the frame structure 110. This prevents external moisture or debris from entering the accommodating cavity within the frame structure 110 through the gap between the two. In this embodiment, the second sealing member 420 is a sealant. After the first fixed connection assembly 700 securely connects the liquid cooling plate 200, the first sealing member 410, and the frame structure 110, sealant is filled between the frame structure 110 and the liquid cooling plate 200 along the inner ring formed by the first fixed connection assembly 700. It is understood that in other embodiments, second sealing members 420 may also be provided between the liquid cooling plate 200 and both sides of the partition baffle 120, and this embodiment is not specifically limited thereto.

[0051] As shown in Figure 6, a recess 111 is provided on the side of the frame structure 110 facing the liquid cooling plate 200, and / or a recess 111 is provided on the side of the liquid cooling plate 200 facing the box frame 100. The recess 111 is configured to accommodate the second sealing member 420. By providing the recess 111 on the side of the frame structure 110 facing the liquid cooling plate 200 and / or the side of the liquid cooling plate 200 facing the frame structure 110, the second sealing member 420 is accommodated in the recess 111, thereby ensuring proper accommodation of the second sealing member 420 and improving its protection, thereby preventing it from falling out from between the frame structure 110 and the liquid cooling plate 200. In this embodiment, a recess 111 may be provided on a side of the frame structure 110 facing the liquid cooling plate 200. In other embodiments, a recess 111 may also be provided on an end face of the liquid cooling plate 200 facing the frame structure 110, or a recess 111 may be provided on both a side of the frame structure 110 facing the liquid cooling plate 200 and a side of the liquid cooling plate 200 facing the frame structure 110. This embodiment does not make any specific limitations.

[0052] As an optional solution, as shown in Figure 2, the second sealing assembly 500 includes a third sealing member 510. The third sealing member 510 is annular and located within the annular area enclosed by all first fixed connection assemblies 700. By disposing the annular third sealing member 510 within the second sealing assembly 500 and within the annular area enclosed by all first fixed connection assemblies 700, not only can the third sealing member 510's sealing effect on the liquid cooling plate 200 and the protective plate 300 be ensured, but the third sealing member 510 itself can also be protected. In this embodiment, the third sealing member 510 is a rubber gasket, which has good elasticity, toughness and wear resistance and a long service life. When the first fixed connection component 700 fixedly connects the liquid cooling plate 200 and the protective plate 300, the rubber gasket can be compressed and clamped between the liquid cooling plate 200 and the protective plate 300, so that the rubber gasket can fully fill the gap between the liquid cooling plate 200 and the protective plate 300 to achieve sealing of the liquid cooling plate 200 and the protective plate 300.

[0053] In an optional embodiment, a groove is provided on the surface of the liquid cooling plate 200 facing the protective plate 300, and / or a groove is provided on the surface of the protective plate 300 facing the liquid cooling plate 200, and the groove is configured to accommodate the third sealing member 510. By providing a groove on the surface of the protective plate 300 facing the liquid cooling plate 200 and / or the surface of the liquid cooling plate 200 facing the protective plate 300, and accommodating the third sealing member 510 in the groove, the third sealing member 510 is accommodated and protected.

[0054] In this embodiment, neither the side of the liquid cooling plate 200 facing the protection plate 300 nor the side of the protection plate 300 facing the liquid cooling plate 200 is provided with grooves, so as to simplify the processing steps of the liquid cooling plate 200 and the protection plate 300 .

[0055] In this embodiment, the protective plate 300 is made of glass fiber and resin, which are coated in sequence to form the protective plate 300. The produced protective plate 300 has good fire resistance and deformation resistance without additional processing.

[0056] As an optional solution, as shown in Figure 7, the second fixed connection assembly 600 includes a first fixing member 610 and a second fixing member 620, wherein the first fixing member 610 is configured to connect and fix the protective plate 300 and the liquid cooling plate 200 from the end of the liquid cooling plate 200 away from the box frame 100, and a threaded hole 611 is provided on the side of the first fixing member 610 facing the protective plate 300, and the second fixing member 620 is configured to pass through the protective plate 300 from the end of the protective plate 300 away from the liquid cooling plate 200 and be threadedly fixed with the threaded hole 611.

[0057] When it is necessary to fix the partition baffle 120, the liquid cooling plate 200 and the protective plate 300 together, the first fixing member 610 is sequentially passed through the liquid cooling plate 200 and the first sealing member 410 from the end of the liquid cooling plate 200 away from the partition baffle 120, and then the protruding end of the first fixing member 610 is connected and fixed to the partition baffle 120, and then the third sealing member 510 and the protective plate 300 are sequentially arranged at the lower end of the liquid cooling plate 200, and then the second fixing member 620 is used to pass through the liquid cooling plate 200 from the end of the protective plate 300 away from the liquid cooling plate 200 and is threadedly fixed to the threaded hole 611 on the first fixing member 610 to achieve a fixed connection between the liquid cooling plate 200, the third sealing member 510 and the protective plate 300, thereby achieving a sequential fixed connection between the partition baffle 120, the first sealing member 410, the liquid cooling plate 200, the third sealing member 510 and the protective plate 300, with a compact structure and good fixing effect.

[0058] To enhance the sealing effect between the second fixing member 620 and the threaded hole 611 in the first fixing member 610, the second sealing assembly 500 further includes a fourth sealing member 530. This ring-shaped sealing member 530 is positioned between the liquid cooling plate 200 and the protective plate 300 and is positioned around the outer periphery of the second fixing member 620. By positioning the fourth sealing member 530 between the liquid cooling plate 200 and the protective plate 300 and surrounding the outer periphery of the second fixing member 620, the gap between the second fixing member 620 and the threaded hole 611 within the fourth sealing member 530 is effectively sealed. In this embodiment, the fourth sealing member 530 is a rubber gasket, which exhibits excellent elasticity, toughness, and wear resistance.

[0059] In this embodiment, the first fixing member 610 is a blind rivet, and the second fixing member 620 is a bolt. The riveted end of the blind rivet is inserted through the liquid cooling plate 200 and the first sealing member 410 from the end of the liquid cooling plate 200 away from the partition baffle 120, and then riveted to the partition baffle 120. The blind rivet has a threaded hole 611 on the side facing the protective plate 300. The bolt is inserted through the liquid cooling plate 200 from the end of the protective plate 300 away from the liquid cooling plate 200 and is threadedly fixed to the threaded hole 611 in the blind rivet. In other embodiments, the first fixing member 610 can also be a bolt, and a threaded hole compatible with the bolt is provided in the partition baffle 120. When the first fixing member 610 is needed to fix the liquid cooling plate 200 and the partition baffle 120, the threaded end of the bolt is passed through the liquid cooling plate 200 and the first sealing member 410 in sequence from the end of the liquid cooling plate 200 away from the partition baffle 120, and then threadedly fixed to the threaded hole on the partition baffle 120.

[0060] In this embodiment, the specific structure of the first fixed connection assembly 700 is the same as the specific structure of the second fixed connection assembly 600. To ensure brevity, they will not be described here. In addition, in other embodiments, the first fixed connection assembly 700 can also be a single bolt or a single blind rivet, which sequentially connects and fixes the protective plate 300, the liquid cooling plate 200, and the frame structure 110. The second fixed connection assembly 600 can also be a single bolt or a single blind rivet, which sequentially rivets and fixes the protective plate 300, the liquid cooling plate 200, and the partition baffle 120. This embodiment does not specifically limit this.

[0061] In actual applications, since the annular third seal 510 is positioned at the edge of the liquid cooling plate 200, the central area of ​​the liquid cooling plate 200 and the protective plate 300 are supported by the fourth seal 530. This makes the central area of ​​the protective plate 300 easily protrude or dent relative to the liquid cooling plate 200, significantly reducing the service life of the protective plate 300. To ensure the structural strength of the gap between the end surface of the liquid cooling plate 200 near the protective plate 300 and the end surface of the protective plate 300 near the liquid cooling plate 200 at the central position, as shown in FIG7 , the second sealing assembly 500 further includes a supporting docking member 520. The supporting docking member 520 is annular and positioned between the liquid cooling plate 200 and the protective plate 300. The fourth seal 530 is sandwiched between the supporting docking member 520 and the liquid cooling plate 200; and / or, the fourth seal 530 is sandwiched between the supporting docking member 520 and the protective plate 300. By arranging a supporting docking piece 520 between the liquid cooling plate 200 and the protective plate 300, the supporting docking piece 520 is sleeved on the outer periphery of the second fixing piece 620, and the fourth sealing piece 530 is clamped between the supporting docking piece 520 and the liquid cooling plate 200 and between the supporting docking piece 520 and the protective plate 300, the protective plate 300 in the central area is prevented from protruding or sinking relative to the liquid cooling plate 200, thereby improving the protection of the protective plate 300.

[0062] An annular receiving groove 521 is provided on one side of the support docking member 520 facing the liquid cooling plate 200 and on one side of the support docking member 520 facing the protective plate 300. The fourth sealing member 530 is respectively accommodated in the annular receiving groove 521 to achieve the accommodation and positioning of the fourth sealing member 530. The structure is simple and the positioning effect is good. In this embodiment, the support docking member 520 is a gasket. An avoidance hole is provided inside the gasket for the second fixing member 620 to pass through. An annular receiving groove 521 is provided on one side of the gasket facing the liquid cooling plate 200 and on one side of the gasket facing the protective plate 300, and the annular receiving groove 521 is arranged concentrically with the avoidance hole. In other embodiments, the support docking member 520 can also be other cylindrical structures with avoidance holes, which is not specifically limited in this embodiment.

[0063] This embodiment also provides a battery pack. The battery pack includes multiple batteries and a battery case 1000. The multiple batteries are connected in series and / or in parallel, and are housed in a storage cavity 112 within the battery case 1000. By utilizing the battery case 1000, the battery pack effectively seals and secures the case frame 100 to the liquid cooling plate 200, and also effectively seals and secures the liquid cooling plate 200 to the protective plate 300. This results in a compact structure, excellent sealing, and enhanced protection for the batteries within the battery case 1000.

Claims

1. A battery box, comprising: A box frame (100), a liquid cooling plate (200), and a protection plate (300) stacked in sequence; a plurality of groups of fixed connection components, at least some of which are arranged at intervals on the edge of the protection plate (300) to fixedly connect the protection plate (300), the liquid cooling plate (200) and the box frame (100); A first layer sealing component (400) is located between the liquid cooling plate (200) and the box frame (100), and at least a portion of the first layer sealing component (400) is disposed around an edge of the liquid cooling plate (200); The second layer of sealing components (500) is located between the protection plate (300) and the liquid cooling plate (200), and at least a portion of the second layer of sealing components (500) is disposed around the edge of the protection plate (300).

2. The battery case according to claim 1, wherein: The box frame (100) comprises a surrounding frame structure (110) and a partition baffle (120) fixedly connected to the surrounding frame structure (110); The plurality of sets of fixed connection components include a first fixed connection component (700) and a second fixed connection component (600); A plurality of the first fixed connection components (700) are configured to fixedly connect the protection plate (300), the liquid cooling plate (200), and the surrounding frame structure (110); The plurality of second fixed connection components (600) are configured to fixedly connect the protection plate (300), the liquid cooling plate (200), and the partition baffle (120).

3. The battery case according to claim 2, wherein: The first layer sealing component (400) comprises a first sealing member (410), a portion of the first sealing member (410) being arranged corresponding to the first fixed connection component (700), and a remaining portion of the first sealing member (410) being arranged corresponding to the second fixed connection component (600).

4. The battery case according to claim 3, wherein: The first-layer sealing component (400) further comprises a second sealing member (420), the second sealing member (420) being annular, the second sealing member (420) being located between the liquid cooling plate (200) and the surrounding frame structure (110), and the second sealing member (420) being located within an annular range formed by all the first fixed connection components (700).

5. The battery case according to claim 4, wherein: At least one of a side of the enclosure structure (110) facing the liquid cooling plate (200) or a side of the liquid cooling plate (200) facing the enclosure structure (110) is provided with a recess (111), and the recess (111) is configured to accommodate the second sealing member (420).

6. The battery case according to any one of claims 2 to 5, wherein: The second layer sealing component (500) comprises a third sealing member (510), the third sealing member (510) is annular, and the third sealing member (510) is located within an annular range formed by all the first fixed connection components (700).

7. The battery case according to claim 6, wherein: At least one of a side of the liquid cooling plate (200) facing the protective plate (300) or a side of the protective plate (300) facing the liquid cooling plate (200) is provided with a groove, and the groove is configured to accommodate the third sealing member (510).

8. The battery case according to claim 7, wherein: The second layer sealing assembly (500) further comprises: A fourth sealing member (530), the fourth sealing member (530) is annular and is sleeved on the outer circumference of the second fixed connection assembly (600).

9. The battery case according to claim 8, wherein: The second layer sealing assembly (500) further comprises: A support docking member (520), wherein the support docking member (520) is annular, the support docking member (520) is located between the liquid cooling plate (200) and the protective plate (300), and the fourth sealing member (530) is sandwiched between the support docking member (520) and the liquid cooling plate (200); and the fourth sealing member (530) is sandwiched between the support docking member (520) and the protective plate (300).

10. The battery case according to claim 1, wherein: The fixed connection assembly comprises: A first fixing member (610), the first fixing member (610) being arranged to connect and fix the protection plate (300) and the liquid cooling plate (200) from one end of the liquid cooling plate (200) away from the box frame (100); and A second fixing member (620), wherein a threaded hole (611) is provided on a side of the first fixing member (610) facing the protective plate (300), and the second fixing member (620) is arranged to pass through the protective plate (300) from an end of the protective plate (300) away from the liquid cooling plate (200) and be threadedly fixed to the threaded hole (611).

11. A battery pack, comprising a plurality of batteries and a battery case as claimed in any one of claims 1 to 10, wherein the plurality of batteries are connected to each other in at least one of series connection and parallel connection, and the plurality of batteries are accommodated in the battery case.

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