Battery box body and battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery box body and a battery pack. A battery box body in the battery pack comprises a box body frame, a liquid cooling plate, a protection plate, a plurality of groups of fixed connection assemblies, a first layer of sealing assembly and a second layer of sealing assembly, the box body frame, the liquid cooling plate and the protection plate are sequentially stacked, and at least part of the fixed connection assemblies are arranged at the edge of the protection plate at intervals; the first-layer sealing assembly is located between the liquid cooling plate and the box body frame, at least part of the first-layer sealing assembly is annularly arranged on the edge of the liquid cooling plate, the second-layer sealing assembly is located between the protection plate and the liquid cooling plate, at least part of the second-layer sealing assembly is annularly arranged on the edge of the protection plate, and the first-layer sealing assembly and the second-layer sealing assembly are fixedly connected. According to the battery box, the box frame and the liquid cooling plate are sealed and fixed, the liquid cooling plate and the protection plate are sealed and fixed, the structure is compact, the sealing effect is good, and the protection on the battery in the battery box is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery box body and a battery pack. Background Art

[0002] As a very important component in an electric vehicle, a battery pack is used to provide electric energy for the electric vehicle. The battery pack consists of a battery box body and a plurality of batteries, and the plurality of batteries are arranged in series and / or in parallel in the battery box body. The battery box body includes a box body frame, a liquid cooling plate and a bottom protection plate which are arranged in sequence from top to bottom. The batteries are accommodated in the accommodation space surrounded by the box body frame. The liquid cooling plate is configured to dissipate heat from the batteries in the accommodation space, and the bottom protection plate is used to protect the liquid cooling plate.

[0003] In the related art, the bottom protection plate is welded and fixed to the liquid cooling plate by friction stir welding. In actual application scenarios, due to the poor welding quality between the bottom protection plate and the liquid cooling plate, welding failure is likely to occur between the bottom protection plate and the liquid cooling plate, and sewage or other foreign objects flow into the space between the liquid cooling plate and the bottom protection plate along the weld seam, resulting in damage to the liquid cooling plate. In addition, the box body frame and the liquid cooling plate are connected together by bolts and nuts, and sewage or other foreign objects are also likely to flow into the batteries in the box body frame along the gap between the box body frame and the liquid cooling plate, resulting in damage to the batteries. The sealing effects between the box body frame and the liquid cooling plate and between the liquid cooling plate and the bottom protection plate are both poor, which greatly affects the service life and use safety of the battery pack. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery box body and a battery pack to achieve effective sealing between the box body frame and the liquid cooling plate and between the liquid cooling plate and the bottom protection plate, and improve the use safety and service life of the battery box body and the battery pack.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A battery box body, comprising:

[0007] A box body frame, a liquid cooling plate and a protection plate which are stacked in sequence;

[0008] A plurality of sets of fixed connection components, at least part of the fixed connection components are arranged at intervals on the edge of the protection plate for fixedly connecting the protection plate, the liquid cooling plate and the box body frame;

[0009] A first layer of sealing component, located between the liquid cooling plate and the box body frame, at least part of the first layer of sealing component is arranged around the edge of the liquid cooling plate;

[0010] A second layer of sealing component, located between the protection plate and the liquid cooling plate, at least part of the second layer of sealing component is arranged around the edge of the protection plate.

[0011] As an alternative, the box frame includes a surrounding frame structure and partition baffles fixedly connected within the surrounding frame structure;

[0012] Among the multiple groups of fixed connection components, there are a first fixed connection component and a second fixed connection component. A plurality of the first fixed connection components are used to fixedly connect the protection plate, the liquid cooling plate, and the surrounding frame structure;

[0013] A plurality of the second fixed connection components are used to fixedly connect the protection plate, the liquid cooling plate, and the partition baffles.

[0014] As an alternative, the first layer of sealing components includes a first seal. Some of the first seals are arranged corresponding to the first fixed connection components, and the remaining part of the first seals are arranged corresponding to the second fixed connection components.

[0015] As an alternative, the first layer of sealing components further includes a second seal. The second seal is annular. The second seal is located between the liquid cooling plate and the surrounding frame structure, and the second seal is located within the annular range formed by surrounding all the first fixed connection components.

[0016] As an alternative, a concave portion is provided on the surface of the surrounding frame structure facing the liquid cooling plate, and / or a concave portion is provided on the surface of the liquid cooling plate facing the surrounding frame structure. The concave portion is used to accommodate the second seal.

[0017] As an alternative, the second layer of sealing components includes a third seal. The third seal is annular. The third seal is located within the annular range formed by surrounding all the first fixed connection components.

[0018] As an alternative, a groove is provided on the surface of the liquid cooling plate facing the protection plate, and / or a groove is provided on the surface of the protection plate facing the liquid cooling plate. The groove is used to accommodate the third seal.

[0019] As an alternative, the second layer of sealing components further includes:

[0020] A fourth seal. The fourth seal is annular. The fourth seal is sleeved on the outer periphery of the second fixed connection component.

[0021] As an alternative, the second layer of sealing components further includes:

[0022] A support docking member, the support docking member being annular, the support docking member being located between the liquid cooling plate and the protection plate, the fourth sealing member being clamped between the support docking member and the liquid cooling plate; and, the fourth sealing member being clamped between the support docking member and the protection plate.

[0023] As an alternative, the fixed connection assembly includes:

[0024] A first fixing member for connecting and fixing the protection plate and the liquid cooling plate from one end of the liquid cooling plate away from the box body frame; and

[0025] A second fixing member, a threaded hole being formed on a surface of the first fixing member facing the protection plate, the second fixing member being used to pass through the protection plate from one end of the protection plate away from the liquid cooling plate and be threadedly fixed to the threaded hole.

[0026] A battery pack, including a plurality of batteries and the battery box body as described above, the plurality of batteries being connected in series and / or in parallel with each other, and the plurality of batteries being all accommodated in the battery box body.

[0027] Advantages of the present utility model:

[0028] For the battery box body provided by the present utility model, by stacking the box body frame, the liquid cooling plate and the protection plate in sequence, and arranging multiple groups of fixed connection assemblies to connect and fix the protection plate, the liquid cooling plate and the box body frame, it can realize the support, cooling and protection of the battery. By arranging the first sealing assembly between the liquid cooling plate and the box body frame, at least part of the first sealing assembly is annularly arranged on the edge of the liquid cooling plate, which can effectively seal the gap between the liquid cooling plate and the box body frame. By arranging the second sealing assembly between the protection plate and the liquid cooling plate, at least part of the second sealing assembly is annularly arranged on the edge of the protection plate, which can effectively seal the gap between the protection plate and the liquid cooling plate, so that the box body frame, the first sealing assembly, the liquid cooling plate, the second sealing assembly and the protection plate in the battery box body are stacked and fixed in sequence, with a compact structure. Combining the sealing of the gap between the liquid cooling plate and the box body frame by the first sealing assembly and the sealing of the gap between the liquid cooling plate and the protection plate by the second sealing assembly, the sealing of the battery box body is realized, with a good sealing effect, effectively preventing sewage or other foreign objects from entering the battery box body along the gap between the liquid cooling plate and the box body frame or the gap between the liquid cooling plate and the protection plate, and improving the protection of the battery box body and the batteries in the battery box body.

[0029] This embodiment also provides a battery pack. By applying the above battery box body, effective sealing and fixing of the box body frame and the liquid cooling plate, and effective sealing and fixing of the liquid cooling plate and the protection plate are achieved. The structure is compact, the sealing effect is good, effectively preventing sewage or other foreign objects from entering the battery box body through the gaps between the liquid cooling plate and the box body frame or between the liquid cooling plate and the protection plate, and improving the protection of the battery box body and the batteries inside the battery box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is an axonometric view of the battery box body provided by an embodiment of the present invention;

[0031] Figure 2 is an exploded view of the battery box body provided by an embodiment of the present invention;

[0032] Figure 3 Schematic cross-sectional view of the battery box body provided by an embodiment of the present invention

[0033] Figure 4 is a schematic structural view of the battery box body with the protection plate hidden provided by an embodiment of the present invention;

[0034] Figure 5 is Figure 3 a partial enlarged view of part A in

[0035] Figure 6 is Figure 5 a partial enlarged view of part B in

[0036] Figure 7 is Figure 5 a partial enlarged view of part C in

[0037] Figure 8 is Figure 4 a partial enlarged view of part D in

[0038] In the figure:

[0039] 1000, battery box body;

[0040] 100, box body frame; 110, surrounding frame structure; 111, recess; 112, storage cavity; 113, electrical cavity; 120, partition baffle; 130, support beam;

[0041] 200, liquid cooling plate; 210, liquid inlet pipe; 220, liquid outlet pipe;

[0042] 300, protection plate;

[0043] 400, first layer sealing assembly; 410, first seal; 420, second seal;

[0044] 500. Second - layer sealing assembly; 510. Third seal; 520. Support docking member; 521. Annular accommodating groove; 530. Fourth seal;

[0045] 600. Second fixed - connection assembly; 610. First fixing member; 611. Threaded hole; 620. Second fixing member;

[0046] 700. First fixed - connection assembly. Detailed implementation mode

[0047] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present utility model clearer, the technical solutions of the present utility model will be further described below with reference to the drawings and through specific implementation modes.

[0048] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0049] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the top of", and "on the top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below the bottom of", and "under the bottom of" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature is at a lower horizontal height than the second feature.

[0050] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0051] In the related art, the bottom guard plate is welded and fixed to the liquid cooling plate by friction stir welding. In actual application scenarios, due to the poor welding quality between the bottom guard plate and the liquid cooling plate, welding failure is likely to occur between the bottom guard plate and the liquid cooling plate, and sewage or other foreign objects flow into the space between the liquid cooling plate and the bottom guard plate along the weld, resulting in damage to the liquid cooling plate. In addition, the box body frame and the liquid cooling plate are connected together by bolts and nuts, and sewage or other foreign objects are also likely to flow into the battery in the box body frame along the gap between the box body frame and the liquid cooling plate, resulting in damage to the battery. The sealing effects between the box body frame and the liquid cooling plate and between the liquid cooling plate and the bottom guard plate are both poor, greatly affecting the service life and safety of the battery pack.

[0052] To solve the above problems, as Figures 1 to 8 shown, this embodiment provides a battery box body 1000. The battery box body 1000 includes a box body frame 100, a liquid cooling plate 200, a protection plate 300, multiple groups of fixed connection components, a first-layer sealing component 400, and a second-layer sealing component 500. Among them, the box body frame 100, the liquid cooling plate 200, and the protection plate 300 are stacked in sequence, and at least part of the fixed connection components are arranged at intervals on the edge of the protection plate 300 for fixedly connecting the protection plate 300, the liquid cooling plate 200, and the box body frame 100. The first-layer sealing component 400 is located between the liquid cooling plate 200 and the box body frame 100, and at least part of the first-layer sealing component 400 is annularly arranged on the edge of the liquid cooling plate 200. The second-layer sealing component 500 is located between the protection plate 300 and the liquid cooling plate 200, and at least part of the second-layer sealing component 500 is annularly arranged on the edge of the protection plate 300.

[0053] The battery box body 1000 can support, cool, and protect the battery by stacking the box body frame 100, the liquid cooling plate 200, and the protection plate 300 in sequence and setting multiple groups of fixed connection components to connect and fix the protection plate 300, the liquid cooling plate 200, and the box body frame 100. By setting the first layer of sealing component 400 between the liquid cooling plate 200 and the box body frame 100, at least part of the first layer of sealing component 400 is arranged around the edge of the liquid cooling plate 200, which can effectively seal the gap between the liquid cooling plate 200 and the box body frame 100. By setting the second layer of sealing component 500 between the protection plate 300 and the liquid cooling plate 200, at least part of the second layer of sealing component 500 is arranged around the edge of the protection plate 300, which can effectively seal the gap between the protection plate 300 and the liquid cooling plate 200. The box body frame 100, the first layer of sealing component 400, the liquid cooling plate 200, the second layer of sealing component 500, and the protection plate 300 in the battery box body 1000 are stacked and fixed in sequence, with a compact structure. Combining the sealing of the gap between the liquid cooling plate 200 and the box body frame 100 by the first layer of sealing component 400 and the sealing of the gap between the liquid cooling plate 200 and the protection plate 300 by the second layer of sealing component 500 realizes the sealing of the battery box body 1000, with a good sealing effect, effectively preventing sewage or other foreign objects from entering the battery box body 1000 along the gap between the liquid cooling plate 200 and the box body frame 100 or the gap between the liquid cooling plate 200 and the protection plate 300, and improving the protection of the battery box body 1000 and the battery inside the battery box body 1000.

[0054] It should be noted that in this embodiment, the protection plate 300, the liquid cooling plate 200, and the box body frame 100 are stacked in sequence from bottom to top so that the battery can be supported at the upper end of the battery box body 1000. In other embodiments, the stacking direction of the box body frame 100, the liquid cooling plate 200, and the protection plate 300 can also be adjusted according to actual needs, and this embodiment does not make specific limitations.

[0055] As an alternative, the box frame 100 includes a surrounding frame structure 110 and partition baffles 120 fixedly connected within the surrounding frame structure 110. Among the multiple sets of fixed connection components, there are a first fixed connection component 700 and a second fixed connection component 600. A plurality of first fixed connection components 700 are used to fixedly connect the protection plate 300, the liquid cooling plate 200, and the surrounding frame structure 110, and a plurality of second fixed connection components 600 are used to fixedly connect the protection plate 300, the liquid cooling plate 200, and the partition baffles 120. By splitting the box frame 100 into a surrounding frame structure 110 and partition baffles 120 fixedly connected within the surrounding frame structure 110, the space within the surrounding frame structure 110 can be split into multiple independent partitions, facilitating subsequent battery storage. By using the first fixed connection components 700 to fixedly connect the protection plate 300, the liquid cooling plate 200, and the surrounding frame structure 110, and using a plurality of second fixed connection components 600 to fixedly connect the protection plate 300, the liquid cooling plate 200, and the partition baffles 120, the fixed connection of the protection plate 300 and the liquid cooling plate 200 to the surrounding frame structure 110 and the partition baffles 120 respectively can be achieved.

[0056] It should be noted that in this embodiment, the first fixed connection component 700 includes blind rivets, and the protection plate 300, the liquid cooling plate 200, and the surrounding frame structure 110 are riveted and fixed by using blind rivets. The second fixed connection component 600 includes blind rivets, and the protection plate 300, the liquid cooling plate 200, and the partition baffles 120 are riveted and fixed by using blind rivets. The specific structure and riveting principle of the blind rivets both belong to the prior art and will not be elaborated further.

[0057] Specifically, the partition baffles 120 can divide the accommodation cavity within the surrounding frame structure 110 into at least two independent sub-cavities. The at least two sub-cavities respectively include at least one electrical cavity 113 and at least one storage cavity 112. The battery is accommodated in the storage cavity 112, and the wire harness is accommodated in the electrical cavity 113. By splitting the box frame 100 into a surrounding frame structure 110 and partition baffles 120, and enabling the first fixed connection component 700 and the second fixed connection component 600 to respectively connect and fix the surrounding frame structure 110 and the partition baffles 120 to the liquid cooling plate 200, the sealing and fixing effect between the box frame 100 and the liquid cooling plate 200 is ensured. By using the partition baffles 120 to split the accommodation cavity within the surrounding frame structure 110 into at least two sub-cavities, such that the at least two sub-cavities respectively include at least one storage cavity 112 for storing the battery and at least one electrical cavity 113 for accommodating the wire harness, the storage safety of the battery and the wire harness can be ensured. It should be noted that in this embodiment, the accommodation cavity within the surrounding frame structure 110 is split into one electrical cavity 113 and four storage cavities 112 by the partition baffles 120. In other embodiments, the specific quantities of the electrical cavity 113 and the storage cavity 112 can also be adjusted according to actual requirements.

[0058] In addition, to further improve the space utilization rate, as Figure 1 shown, in this embodiment, both the liquid inlet pipe 210 and the liquid outlet pipe 220 on the liquid cooling plate 200 are accommodated in the electrical cavity 113 and communicate with the outside.

[0059] Furthermore, the enclosure structure 110 is made of steel, and the partition baffle 120 is made of aluminum. In the actual production process of the box frame 100, if both the enclosure structure 110 and the partition baffle 120 are made of steel, it will result in a box frame 100 that, although meeting the requirements of structural strength, is too heavy to meet the actual installation needs; if both the enclosure structure 110 and the partition baffle 120 are made of steel, it will lead to too high production costs of the box frame 100. By making the enclosure structure 110 of steel, the structural strength of the enclosure structure 110 can be ensured, preventing the enclosure structure 110 from deforming under force. By making the partition baffle 120 of aluminum, the weight of the box frame 100 can be reduced, achieving the effect of combining steel and aluminum in the production of the box frame 100. While reducing the weight of the box frame 100 to meet the actual strength requirements and installation needs, the production costs are also reduced.

[0060] To further improve the structural strength of the electrical cavity 113, the box frame 100 further includes a support beam 130. Among them, the support beam 130 is supported between the cavity walls of the electrical cavity 113 by means of 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 means of welding and riveting, the structural strength of the electrical cavity 113 can be ensured, preventing the battery in the storage cavity 112 from expanding and squeezing and damaging the electrical cavity 113. Specifically, plane extension parts are respectively provided at both axial ends of the support beam 130. The plane extension parts are attached to the cavity walls of the electrical cavity 113 and are connected and fixed to the cavity walls of the electrical cavity 113 by means of welding or riveting.

[0061] In an optional embodiment, the first-layer sealing assembly 400 includes a first seal 410. Part of the first seal 410 is correspondingly arranged opposite to the first fixed connection assembly 700, and the rest of the first seal 410 is correspondingly arranged opposite to the second fixed connection assembly 600. By correspondingly arranging part of the first seal 410 in the first-layer sealing assembly 400 opposite to the first fixed connection assembly 700 and arranging the rest of the first seal 410 in the first-layer sealing assembly 400 opposite to the second fixed connection assembly 600, the first seal 410 can achieve the sealing between the enclosure structure 110 and the liquid cooling plate 200 and the sealing between the partition baffle 120 and the liquid cooling plate 200 at the same time.

[0062] Specifically, the first fixed connection component 700 sequentially passes through the protection plate 300, the liquid cooling plate 200, and the first seal 410 and then is fixedly connected to the frame structure 110 to achieve the sealing of the liquid cooling plate 200 and the frame structure 110 by the first seal 410. The second fixed connection component 600 sequentially passes through the liquid cooling plate 200 and the first seal 410 and then is fixedly connected to the partition baffle 120 to achieve the sealing of the liquid cooling plate 200 and the partition baffle 120 by the first seal 410. It should be noted that in this embodiment, the first seal 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 fixedly connects the liquid cooling plate 200 and the frame structure 110, or the second fixed connection component 600 fixedly connects the liquid cooling plate 200 and the partition baffle 120, the rubber gasket can be compressed and clamped between the liquid cooling plate 200 and the frame structure 110 or the partition baffle 120, so that the rubber gasket fully fills the gap between the liquid cooling plate 200 and the frame structure 110 or the partition baffle 120 to achieve the sealing of the liquid cooling plate 200 and the frame structure 110 or the partition baffle 120.

[0063] To further improve the sealing effect between the frame structure 110 and the liquid cooling plate 200, the first layer of seal assembly 400 further includes a second seal 420. The second seal 420 is annular and is located between the liquid cooling plate 200 and the frame structure 110 and within the annular range formed by surrounding all the first fixed connection components 700. By arranging the second seal 420 within the annular range formed by surrounding the first fixed connection components 700 and setting the second seal 420 between the liquid cooling plate 200 and the frame structure 110, an additional layer of sealing structure can be added on the basis of the first seal 410 sealing the liquid cooling plate 200 and the frame structure 110 to further prevent external water vapor or debris from entering the accommodation cavity within the frame structure 110 along the gap between the frame structure 110 and the liquid cooling plate 200. It should be noted that in this embodiment, the second seal 420 is sealant. After the first fixed connection component 700 fixedly connects the liquid cooling plate 200, the first seal 410, and the frame structure 110, the sealant is filled between the frame structure 110 and the liquid cooling plate 200 along the inner annular circle formed by surrounding the first fixed connection components 700. It can be understood that in other embodiments, the second seal 420 can also be arranged between the two sides of the partition baffle 120 and the liquid cooling plate 200, and this embodiment does not make specific limitations.

[0064] Specifically, as Figure 6As shown in the figure, a concave portion 111 is provided on one side of the enclosure structure 110 facing the liquid cooling plate 200, and / or a concave portion 111 is provided on one side of the liquid cooling plate 200 facing the enclosure frame 100. The concave portion 111 is used to accommodate the second seal 420. By providing the concave portion 111 on one side of the enclosure structure 110 facing the liquid cooling plate 200 and / or on one side of the liquid cooling plate 200 facing the enclosure structure 110, and accommodating the second seal 420 in the concave portion 111, the accommodation of the second seal 420 is realized, the protection of the second seal 420 is improved, and the second seal 420 is prevented from falling off between the enclosure structure 110 and the liquid cooling plate 200. It should be noted that in this embodiment, the concave portion 111 is only provided on one side of the enclosure structure 110 facing the liquid cooling plate 200. In other embodiments, the concave portion 111 may also be provided only on the end face of the liquid cooling plate 200 facing the enclosure structure 110, or the concave portion 111 may be provided on one side of the enclosure structure 110 facing the liquid cooling plate 200 and on one side of the liquid cooling plate 200 facing the enclosure structure 110 at the same time. This embodiment does not make specific limitations.

[0065] As an alternative solution, as Figure 2 shown, the second layer sealing assembly 500 includes a third seal 510. The third seal 510 is annular, and the third seal 510 is located within the annular range formed by enclosing all the first fixed connection assemblies 700. By providing the annular third seal 510 inside the second layer sealing assembly 500 and arranging the third seal 510 within the annular range enclosed by all the first fixed connection assemblies 700, not only can the sealing effect of the third seal 510 on the liquid cooling plate 200 and the protection plate 300 be ensured, but also the protection of the third seal 510 itself can be improved. It should be noted that in this embodiment, the third seal 510 is a rubber gasket. The rubber gasket has good elasticity, toughness and wear resistance, and a long service life. When the first fixed connection assembly 700 fixedly connects the liquid cooling plate 200 and the protection plate 300, the rubber gasket can be compressed and clamped between the liquid cooling plate 200 and the protection plate 300, so that the rubber gasket can fully fill the gap between the liquid cooling plate 200 and the protection plate 300 to achieve the sealing of the liquid cooling plate 200 and the protection plate 300.

[0066] In an alternative embodiment, a groove is provided on one side of the liquid cooling plate 200 facing the protection plate 300, and / or a groove is provided on one side of the protection plate 300 facing the liquid cooling plate 200. The groove is used to accommodate the third seal 510. By providing the groove on one side of the protection plate 300 facing the liquid cooling plate 200 and / or on one side of the liquid cooling plate 200 facing the protection plate 300, and accommodating the third seal 510 in the groove, the accommodation of the third seal 510 is realized, and the protection of the third seal 510 is further improved.

[0067] It should be noted that in this embodiment, no grooves are provided on the side of the liquid cooling plate 200 facing the protection plate 300 and the side of the protection plate 300 facing the liquid cooling plate 200, so as to simplify the processing steps of the liquid cooling plate 200 and the protection plate 300.

[0068] Specifically, in this embodiment, the protection plate 300 is made of glass fiber and resin. The glass fiber and resin are coated in sequence by means of coating to make the protection plate 300. The produced protection plate 300 has good fire resistance and anti-deformation ability without additional processing.

[0069] As an alternative, as Figure 7 shown, the second fixed connection component 600 includes a first fixing member 610 and a second fixing member 620. Among them, the first fixing member 610 is used to connect and fix the protection plate 300 and the liquid cooling plate 200 from the end of the liquid cooling plate 200 away from the box body frame 100. A threaded hole 611 is provided on the side of the first fixing member 610 facing the protection plate 300. The second fixing member 620 is used to pass through the protection plate 300 from the end of the protection plate 300 away from the liquid cooling plate 200 and be threadedly fixed to the threaded hole 611.

[0070] When it is necessary to fixedly connect the partition baffle 120, the liquid cooling plate 200 and the protection plate 300, first pass the first fixing member 610 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 connect and fix the extended end of the first fixing member 610 to the partition baffle 120. Subsequently, arrange the third sealing member 510 and the protection plate 300 at the lower end of the liquid cooling plate 200 in sequence, and then use the second fixing member 620 to pass through the liquid cooling plate 200 from the end of the protection plate 300 away from the liquid cooling plate 200 and be threadedly fixed to the threaded hole 611 on the first fixing member 610, so as to realize the fixed connection between the liquid cooling plate 200, the third sealing member 510 and the protection plate 300, and further realize the sequential fixed connection of the partition baffle 120, the first sealing member 410, the liquid cooling plate 200, the third sealing member 510 and the protection plate 300, with a compact structure and good fixing effect.

[0071] To improve the sealing effect between the second fixing member 620 and the threaded hole 611 on the first fixing member 610, the second layer sealing assembly 500 further includes a fourth sealing member 530. The fourth sealing member 530 is annular. The fourth sealing member 530 is located between the liquid cooling plate 200 and the protection plate 300. The fourth sealing member 530 is sleeved on the outer periphery of the second fixing member 620. By providing the fourth sealing member 530 between the liquid cooling plate 200 and the protection plate 300 and sleeving the fourth sealing member 530 on the outer periphery of the second fixing member 620, it is possible to effectively seal the gap between the second fixing member 620 and the threaded hole 611 within the fourth sealing member 530. It should be noted that in this embodiment, the fourth sealing member 530 is a rubber gasket. The rubber gasket has good elasticity, toughness and wear resistance.

[0072] It should be noted that in this embodiment, the first fixing member 610 is a blind rivet and the second fixing member 620 is a bolt. The riveting end of the blind rivet passes 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 is riveted and fixed to the partition baffle 120. A threaded hole 611 is provided on the side of the blind rivet facing the protection plate 300. The bolt passes through the liquid cooling plate 200 from the end of the protection plate 300 away from the liquid cooling plate 200 and is threadedly fixed to the threaded hole 611 on the blind rivet. In other embodiments, the first fixing member 610 can also be a bolt, and a threaded hole adapted to the bolt is provided on the partition baffle 120. When it is necessary to use the first fixing member 610 to fix the liquid cooling plate 200 and the partition baffle 120, the threaded end of the bolt passes 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 is threadedly fixed to the threaded hole on the partition baffle 120.

[0073] In this embodiment, the specific structure of the first fixed connection assembly 700 is the same as that of the second fixed connection assembly 600. For the sake of brevity of the text, it will not be described in detail here. In addition, in other embodiments, the first fixed connection assembly 700 can also be a single bolt or a single blind rivet. The single bolt or single blind rivet connects and fixes the protection plate 300, the liquid cooling plate 200 and the frame structure 110 in sequence. The second fixed connection assembly 600 can also be a single bolt or a single blind rivet. The single bolt or single blind rivet rivets and fixes the protection plate 300, the liquid cooling plate 200 and the partition baffle 120 in sequence. This embodiment does not make specific limitations.

[0074] In an actual application scenario, since the annular third seal 510 is provided at the contour edge of the liquid cooling plate 200, the central region of the liquid cooling plate 200 and the protection plate 300 is only supported by the fourth seal 530, and the central region of the protection plate 300 is prone to protrude or sink relative to the liquid cooling plate 200, greatly affecting the service life of the protection plate 300. To ensure the structural strength of the gap between the end face of the liquid cooling plate 200 near the protection plate 300 and the end face of the protection plate 300 near the liquid cooling plate 200 at the central position, as Figure 7 shown, the second layer sealing assembly 500 further includes a support docking member 520. The support docking member 520 is annular, the support docking member 520 is located between the liquid cooling plate 200 and the protection plate 300, and the fourth seal 530 is clamped between the support docking member 520 and the liquid cooling plate 200; and / or, the fourth seal 530 is clamped between the support docking member 520 and the protection plate 300. By providing the support docking member 520 between the liquid cooling plate 200 and the protection plate 300, the support docking member 520 is sleeved on the outer periphery of the second fixing member 620, and the fourth seal 530 is clamped between the support docking member 520 and the liquid cooling plate 200 and between the support docking member 520 and the protection plate 300, preventing the protection plate 300 in the central region from protruding or sinking relative to the liquid cooling plate 200 and improving the protection of the protection plate 300.

[0075] Specifically, an annular accommodation groove 521 is provided on the surface of the support docking member 520 facing the liquid cooling plate 200 and on the surface of the support docking member 520 facing the protection plate 300. The fourth seal 530 is respectively accommodated in the annular accommodation groove 521 to achieve the accommodation and positioning of the fourth seal 530. The structure is simple and the positioning effect is good. It should be noted that in this embodiment, the support docking member 520 is a gasket. An avoidance hole for the second fixing member 620 to pass through is provided inside the gasket. Annular accommodation grooves 521 are respectively provided on the surface of the gasket facing the liquid cooling plate 200 and the surface facing the protection plate 300, and the annular accommodation groove 521 is concentric with the avoidance hole. In other embodiments, the support docking member 520 may also be other cylindrical structures with avoidance holes, and this embodiment does not make specific limitations.

[0076] This embodiment also provides a battery pack. The battery pack includes a plurality of batteries and the above-mentioned battery box 1000. Among them, the plurality of batteries are connected in series and / or in parallel with each other, and the plurality of batteries are all accommodated in the storage cavity 112 in the battery box 1000. By applying the above-mentioned battery box 1000, the battery pack realizes the effective sealing and fixing of the box frame 100 and the liquid cooling plate 200 and the effective sealing and fixing of the liquid cooling plate 200 and the protection plate 300. The structure is compact, the sealing effect is good, and the protection of the batteries in the battery box 1000 is improved.

[0077] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A battery box, characterized in that: include: 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 be used for fixedly connecting 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 sealing component (500) is located between the protection plate (300) and the liquid cooling plate (200), and at least a portion of the second layer sealing component (500) is arranged around the edge of the protection plate (300).

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

3. The battery box according to claim 2, characterized in that: The first layer sealing component (400) includes a first sealing member (410), a portion of the first sealing member (410) is arranged corresponding to the first fixed connection component (700), and the remaining portion of the first sealing member (410) is arranged corresponding to the second fixed connection component (600).

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

5. The battery case according to claim 4, characterized in that: A recess (111) is provided on one side of the frame structure (110) facing the liquid cooling plate (200), and / or a recess (111) is provided on one side of the liquid cooling plate (200) facing the frame structure (110), and the recess (111) is used to accommodate the second sealing member (420).

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

7. The battery case according to claim 6, characterized in that: A groove is provided on one side of the liquid cooling plate (200) facing the protective plate (300), and / or a groove is provided on one side of the protective plate (300) facing the liquid cooling plate (200), and the groove is used to accommodate the third sealing member (510).

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

9. The battery case according to claim 8, characterized in that: The second 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 box according to claim 1, characterized in that: The fixed connection components include: a first fixing member (610), the first fixing member (610) being used 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 used 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, characterized in that: It comprises a plurality of batteries and a battery box as claimed in any one of claims 1 to 10, wherein the plurality of batteries are connected in series and / or in parallel, and the plurality of batteries are accommodated in the battery box.

Images