Battery box body and battery pack

Abstract

The utility model provides a battery box body and a battery pack, the battery box body is used for accommodating a battery cell, the battery box body comprises a box body main body and an expansion piece, the box body main body comprises a liquid cooling plate and at least two side plates, and the at least two side plates are connected in sequence and are connected with the liquid cooling plate; the expansion piece is connected with the liquid cooling plate and is connected between two of the side plates, and the expansion piece, the liquid cooling plate and the at least two side plates jointly define a containing cavity for containing the battery cell. The liquid cooling plate can be used for cooling the battery cell in the accommodating cavity, and the working temperature of the battery cell can be reduced, so that the normal work of the battery cell is ensured, and the normal work of the battery is ensured. When the battery box body and even the battery pack are impacted or impacted, the expansion piece can relieve impact or impact energy, so that normal use of the battery cells and the battery pack is ensured. And the liquid cooling plate and the at least two side plates are integrated. Through the arrangement, the welding seams of the box main body are fewer, so that the risk of liquid leakage can be reduced, and the normal use of the battery cell and the battery pack is further ensured.

Description

Technical Field

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

[0002] Battery packs generally use boxes to protect the batteries to prevent the batteries from being hit by external forces or being attacked by moisture and dust, thereby extending the battery life.

[0003] In the related art, the box of the battery pack is generally connected by welding.

[0004] However, the above-mentioned box is prone to welds, causing liquid leakage. Utility Model Content

[0005] In order to solve at least one of the problems mentioned in the background technology, the present application provides a battery case and a battery pack, aiming to solve the technical problem that the case in the related technology is prone to welds and causes leakage.

[0006] In order to achieve the above-mentioned purpose, in a first aspect, the present application provides a battery box for accommodating a battery cell, wherein the battery box comprises a box body and an expansion member.

[0007] The box body includes a liquid cooling plate and at least two side plates, and the at least two side plates are connected in sequence and are both connected to the liquid cooling plate;

[0008] The expansion member is connected to the liquid cooling plate and is connected between two of the side plates. The expansion member, the liquid cooling plate and at least two of the side plates together form a receiving cavity for receiving the battery cell.

[0009] The liquid cooling plate and at least two of the side plates are integrally formed.

[0010] In the above-mentioned battery box, optionally, the liquid cooling plate and at least two of the side plates are aluminum plates, and the liquid cooling plate and at least two of the side plates are prepared by an aluminum extrusion process.

[0011] In the above-mentioned battery case, optionally, the expansion piece includes a front plate, a middle plate and a support plate, the middle plate is located between the front plate and the support plate, the front plate is located on a side of the middle plate away from the accommodating cavity, and the support plate faces the accommodating cavity.

[0012] In the above-mentioned battery box, optionally, the front plate is provided with a through hole, and the number of the intermediate plates is multiple; the multiple intermediate plates are arranged to avoid the through hole and are arranged at intervals, and the front plate, the support plate and the multiple intermediate plates together form an installation cavity for placing the power supply components.

[0013] In the above-mentioned battery box, optionally, the expansion piece also includes a positioning plate connected to the front plate, the positioning plate is located between the front plate and the support plate, the extension direction of the positioning plate intersects with the extension direction of the front plate, the positioning plate has a limiting hole corresponding to the middle plate, and the middle plate is located in the limiting hole.

[0014] In the above-mentioned battery box, optionally, a plurality of first protrusions arranged at intervals are provided on a side of the front plate close to the middle plate or a side of the support plate close to the middle plate, and a clamping groove is formed between two adjacent first protrusions;

[0015] The middle plate has a clamping portion corresponding to the clamping slot, and the clamping portion is located in the clamping slot.

[0016] In the above-mentioned battery box, optionally, it further includes at least two support members;

[0017] At least two of the support members are disposed on a side of at least two of the side plates facing the accommodating cavity;

[0018] And / or, one of the support members is arranged on a side of the expansion member facing the accommodating cavity, and the remaining number of the support members are arranged on a side of at least two of the side plates facing the accommodating cavity.

[0019] In the above-mentioned battery box, optionally, when one of the support members is arranged on a side of the expansion member facing the accommodating cavity, and the remaining number of the support members are arranged on a side of at least two of the side plates facing the accommodating cavity,

[0020] The support member includes a main board and a second protrusion disposed on the main board, wherein one of the main boards is disposed on a side of the expansion member facing the accommodating cavity, and the remaining number of the main boards are disposed on a side of at least two of the side boards facing the accommodating cavity, and the second protrusion is disposed on a side of the main board facing the accommodating cavity;

[0021] There are multiple second protrusions, and the multiple second protrusions are arranged at intervals along the extension direction of the mainboard. Two adjacent second protrusions jointly form a first groove for clamping the battery cell.

[0022] In the above-mentioned battery box, optionally, it further includes a protection plate, and the number of the protection plates is multiple;

[0023] Along the extension direction of the side plate, a plurality of the protection plates are arranged at intervals on the side plate provided with the support member, and two adjacent protection plates jointly form a second groove for clamping the battery cell, and the second groove is arranged corresponding to the first groove and is connected to each other;

[0024] The liquid cooling plate, the protection plate, and at least two of the side plates are all aluminum plates, and the liquid cooling plate, the protection plate, and at least two of the side plates are prepared by an aluminum extrusion process.

[0025] In a second aspect, the present application also provides a battery pack, comprising a battery cell and the battery case, wherein the battery cell is located in the battery case.

[0026] The battery box and battery pack provided by the present application, the battery box is used to accommodate the battery cell, the battery box includes a box body and an expansion piece, the box body includes a liquid cooling plate and at least two side plates, at least two side plates are connected in sequence, and are connected to the liquid cooling plate; the expansion piece is connected to the liquid cooling plate, and is connected between two of the side plates, and the expansion piece, the liquid cooling plate and at least two side plates together form a receiving chamber for accommodating the battery cell. By setting the liquid cooling plate, the liquid cooling plate can be used to cool the battery cell located in the receiving chamber, which can reduce the operating temperature of the battery cell, thereby ensuring the normal operation of the battery cell, thereby ensuring the normal operation of the battery. By setting the expansion piece, when the battery box or even the battery pack is impacted or hit, the expansion piece can alleviate the energy of the impact or impact to ensure the normal use of the battery cell and the battery pack. The liquid cooling plate and at least two side plates are an integral part. Through the above-mentioned arrangement, the weld seams of the box body are less, which can reduce the risk of leakage, thereby ensuring the normal use of the battery cell and the battery pack.

[0027] The structure of the present application and its other application objects and beneficial effects will be more clearly understood through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the exploded structure of a battery box provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of the exploded structure of the expansion piece of the battery box provided in an embodiment of the present application;

[0031] Figure 3 A three-dimensional structural schematic diagram of a portion of the battery box provided in an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 10-battery box;

[0034] 100-box body; 101-accommodation chamber; 110-liquid cooling plate; 120-side plate;

[0035] 200-expansion member; 201-installation cavity; 202-clamping groove; 203-liquid inlet; 204-liquid outlet; 210-front plate; 211-through hole; 220-middle plate; 221-clamping portion; 230-support plate; 231-first protrusion; 240-positioning plate; 241-limiting hole;

[0036] 300-supporting member; 310-main board; 320-second protrusion; 330-first groove;

[0037] 400-protection board;

[0038] 500-Second groove.

[0039] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0040] In the related art, the box body is usually assembled by welding the panels, but with the increase of usage time, or collision during transfer or transportation, gaps, i.e. welds, are prone to occur at the welding positions, which may cause leakage of the battery pack and affect the consistency and safety of the battery pack.

[0041] Based on the above technical problems, the embodiment of the present application provides a battery box and a battery pack, the battery box is used to accommodate the battery cell, the battery box includes a box body and an expansion piece, the box body includes a liquid cooling plate and at least two side plates, at least two side plates are connected in sequence, and both are connected to the liquid cooling plate; the two ends of the expansion piece are respectively connected to the two side plates close to the expansion piece, and the expansion piece, the liquid cooling plate and at least two side plates together form a receiving cavity for accommodating the battery cell. By setting the liquid cooling plate, the liquid cooling plate can be used to cool the battery cell located in the receiving cavity, which can reduce the operating temperature of the battery cell, thereby ensuring the normal operation of the battery cell, thereby ensuring the normal operation of the battery. By setting the expansion piece, when the battery box or even the battery pack is impacted or hit, the expansion piece can alleviate the energy of the impact or impact to ensure the normal use of the battery cell and the battery pack. The liquid cooling plate and at least two side plates are an integral part. Through the above arrangement, the weld seams of the box body are less, which can reduce the risk of leakage, thereby ensuring the normal use of the battery cell and the battery pack.

[0042] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar structural parts or structural parts with the same or similar functions. The described embodiments are part of the structural embodiments of the present application, rather than the embodiments of the full structure. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0043] In a first aspect, an embodiment of the present application provides a battery pack, comprising a battery cell and a battery case, wherein the battery cell is located in the battery case.

[0044] It can be understood that the type of battery cell can be arbitrary. For example, the battery cell can be a lithium-ion battery cell, which has a higher energy density and can have a longer continuous working time. In another example, the battery cell can be a nickel-metal hydride battery cell, which has a longer life and a lower cost. In another example, the battery cell can be a lithium iron phosphate battery cell, which has good thermal stability and chemical stability, is not prone to combustion, explosion, etc., and can improve the stability of battery use.

[0045] The embodiments of the present application do not limit the specific types of battery cells, nor are they limited to the above examples.

[0046] It should be noted that the shape of the battery cell can be arbitrary. For example, the shape of the battery cell can be a cylinder; for another example, the shape of the battery cell can be a cuboid; for another example, the shape of the battery cell can be a triangular prism. The embodiments of the present application do not limit the specific shape of the battery cell, but are not limited to the above examples.

[0047] It is understandable that the battery pack may include a plurality of cells, wherein the number of cells may be arbitrary, for example, the number of cells may be one, two, three, four, five, six, seven, etc. The embodiments of the present application do not limit the specific number of cells, nor are they limited to the above examples.

[0048] Furthermore, when the battery pack includes multiple cells, the multiple cells can be distributed in any manner within the battery case. For example, the multiple cells can be arranged in a spaced manner within the battery case, such as six cells can be distributed in two columns × three rows within the battery case; for another example, nine cells can be distributed in one column × nine rows within the battery case. The embodiments of the present application do not limit the specific distribution of the multiple cells within the battery case when the battery pack includes multiple cells, nor are they limited to the above examples.

[0049] Figure 1 A schematic diagram of the exploded structure of a battery box provided in an embodiment of the present application;

[0050] Figure 2 A schematic diagram of the exploded structure of the expansion piece of the battery box provided in an embodiment of the present application;

[0051] Figure 3 A schematic three-dimensional structural diagram of a portion of the battery box provided in an embodiment of the present application.

[0052] Second, refer to the attached Figure 1 -Attached Figure 3 As shown, the embodiment of the present application further provides a battery box 10, which is used to accommodate battery cells. The battery box 10 includes a box body 100 and an expansion member 200.

[0053] Specifically, the box body 100 includes a liquid cooling plate 110 and at least two side plates 120 . The at least two side plates 120 are connected in sequence and are all connected to the liquid cooling plate 110 .

[0054] It can be understood that the number of side panels 120 can be arbitrary. For example, the number of side panels 120 can be two, three, four, five, six, seven, etc. The embodiment of the present application does not limit the specific number of side panels 120, nor is it limited to the above examples.

[0055] The following description takes the case where there are three side plates 120 as an example. The three side plates 120 are connected in sequence and are all connected to the liquid cooling plate 110 .

[0056] It should be noted that the angle between two adjacent side panels 120 can be arbitrary. For example, the angle between two adjacent side panels 120 can be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, etc. The embodiment of the present application does not limit the specific angle between two adjacent side panels 120, nor is it limited to the above examples.

[0057] The following description will be made by taking the specific angle between two adjacent side panels 120 as 90° as an example, that is, the two adjacent side panels 120 are vertically arranged.

[0058] Refer to the attached Figure 1 -Attached Figure 3 As shown, further, the expansion member 200 is connected to the liquid cooling plate 110 and is connected between two of the side plates 120. The expansion member 200, the liquid cooling plate 110 and at least two side plates 120 together form a receiving cavity 101 for accommodating the battery cell. That is, when there are three side plates 120, the three side plates 120 connected end to end are connected to the liquid cooling plate 110, and the expansion member 200, the liquid cooling plate 110 and the three side plates 120 together form a receiving cavity 101 to accommodate the battery cell.

[0059] The extension direction of the expansion member 200 is parallel to the extension direction of the side plate 120 not connected to the expansion member 200 .

[0060] In addition, when the battery case 10 is placed on the ground or on the surface of an object, the liquid cooling plate 110 may be located at the bottom of the battery case 10 to support the battery cells.

[0061] The liquid cooling plate 110 and at least two side plates 120 are an integral part, that is, the side plates 120 and the liquid cooling plate 110 enclose a portion of the accommodating cavity 101 as an integral structure. In this way, the box body 100 has fewer welds, which can reduce the risk of leakage, thereby ensuring the normal use of the battery cells and battery packs.

[0062] It should be noted that the accommodating cavity 101 formed by the side plate 120 and the liquid cooling plate 110 has two openings, one of which is located at the position of the expansion member 200. In this way, when the two ends of the expansion member 200 are respectively connected to the two adjacent side plates 120, the expansion member 200 can close the opening to prevent the battery box 10 from leaking liquid, thereby ensuring the normal use of the battery cells located in the accommodating cavity 101, thereby ensuring the normal use of the battery pack.

[0063] In some embodiments, the shape of the accommodating cavity 101 formed by the side plate 120, the expansion piece 200 and the liquid cooling plate 110 can be the same as the shape of the battery cell. Exemplarily, when the shape of the battery cell is a cylinder, the side plate 120, the expansion piece 200 and the liquid cooling plate 110 can form a cylindrical accommodating cavity 101; another exemplary embodiment, when the shape of the battery cell is a rectangular parallelepiped, the side plate 120, the expansion piece 200 and the liquid cooling plate 110 can form a rectangular accommodating cavity 101; another exemplary embodiment, when the shape of the battery cell is a triangular prism, the side plate 120, the expansion piece 200 and the liquid cooling plate 110 can form a triangular prism accommodating cavity 101. At this time, the shape of the accommodating cavity 101 formed by the side plate 120, the expansion piece 200 and the liquid cooling plate 110 is the same as the shape of the battery cell, the battery cell and the accommodating cavity 101 have a high adaptability, the battery cell can be stably arranged in the accommodating cavity 101 of the battery box 10, and the installation stability of the battery cell can be improved.

[0064] In some other embodiments, the shape of the accommodating cavity 101 formed by the side plate 120, the expansion piece 200 and the liquid cooling plate 110 may be different from the shape of the battery cell. Exemplarily, when the shape of the battery cell is a cylinder, the side plate 120, the expansion piece 200 and the liquid cooling plate 110 may form a rectangular shaped accommodating cavity 101; another exemplary embodiment, when the shape of the battery cell is a rectangular shaped, the side plate 120, the expansion piece 200 and the liquid cooling plate 110 may form a triangular shaped accommodating cavity 101; another exemplary embodiment, when the shape of the battery cell is a triangular shaped, the side plate 120, the expansion piece 200 and the liquid cooling plate 110 may form a cylindrical shaped accommodating cavity 101.

[0065] The embodiment of the present application defines and limits the specific shape of the accommodating cavity 101 formed by the side plate 120 , the expansion member 200 , and the liquid cooling plate 110 , and is not limited to the above example.

[0066] The following description will be made by taking the case where the shape of the accommodation cavity 101 formed by the side plate 120 , the expansion member 200 and the liquid cooling plate 110 is a rectangular parallelepiped as an example.

[0067] It is understandable that a cooling liquid for cooling may flow inside the liquid cooling plate 110, and the material of the cooling liquid may be arbitrary. For example, the cooling liquid may include an ethylene glycol solution, a propylene glycol solution, or water, etc. The embodiment of the present application does not limit the specific type of the cooling liquid flowing inside the liquid cooling plate 110, nor is it limited to the above examples.

[0068] It should be noted that, refer to the attached Figure 1 and attached Figure 3As shown, the liquid cooling plate 110 may be provided with a liquid inlet joint 111 for liquid inlet and a liquid outlet joint 112 for liquid outlet, and the liquid inlet joint 111 and the liquid outlet joint 112 may be arranged at intervals and located on a side of the liquid cooling plate 110 close to the expansion member 200. Furthermore, the expansion member 200 may have a liquid inlet 203 and a liquid outlet 204 corresponding to the liquid inlet joint 111 and the liquid outlet joint 112, respectively, to facilitate the circulation of the cooling liquid.

[0069] By providing the liquid cooling plate 110 , the liquid cooling plate 110 can be used to cool the battery cells in the accommodating cavity 101 , thereby lowering the operating temperature of the battery cells, thereby ensuring the normal operation of the battery cells, and thus ensuring the normal operation of the battery.

[0070] As an optional embodiment, a plurality of liquid channels connected in parallel are provided in the liquid cooling plate 110, so that the temperature uniformity inside the cavity can be improved and the heat of the battery cells in the battery pack can be efficiently dissipated.

[0071] As an optional implementation, the liquid cooling plate 110 and at least two side plates 120 are all aluminum plates. In the embodiment of the present application, the liquid cooling plate 110 and the three side plates 120 are all aluminum plates.

[0072] Further, the liquid cooling plate 110 and at least two side plates 120 are prepared by aluminum extrusion process, that is, the liquid cooling plate 110 and three side plates 120 are prepared by aluminum extrusion process. The liquid cooling plate 110 and the three side plates 120 can be used together with the expansion member 200 to enclose the accommodating cavity 101.

[0073] Through the above-mentioned arrangement, the preparation process of the box body 100 is simpler and the cost is lower, which can reduce the cost of the battery box 10 and the battery pack; in addition, through the above-mentioned arrangement, the box body 100 has fewer welds, which can reduce the risk of leakage, thereby ensuring the normal use of the battery cells and the battery pack.

[0074] See attached Figure 1 and attached Figure 2 As shown, as an optional embodiment, the expansion member 200 includes a front plate 210, a middle plate 220 and a support plate 230, the middle plate 220 is located between the front plate 210 and the support plate 230, the front plate 210 is located on the side of the middle plate 220 away from the accommodating cavity 101, and the support plate 230 faces the accommodating cavity 101.

[0075] The support plate 230 may be made of an aluminum alloy material. When the battery cell in the accommodating cavity 101 expands, the support plate 230 may be deformed to ensure the normal placement of the battery cell.

[0076] Through the above configuration, the support plate 230 can be used to support the battery cell to improve the installation stability of the battery cell, thereby ensuring the normal use of the battery cell. The front plate 210 can be used to install electrical components, which can be used to electrically connect to the battery cell to ensure the normal operation of the battery cell and control the working time and working frequency of the battery cell; the middle plate 220 can connect the front plate 210 and the support plate 230 to improve the connection strength between the front plate 210 and the support plate 230, thereby improving the structural strength of the expansion member 200.

[0077] See attached Figure 1 and attached Figure 2 As shown, as an optional embodiment, the front plate 210 is provided with a through hole 211, and the number of the intermediate plates 220 is multiple; the multiple intermediate plates 220 are all arranged to avoid the through hole 211 and are arranged at intervals, and the front plate 210, the support plate 230 and the multiple intermediate plates 220 together form an installation cavity 201 for placing the power supply components.

[0078] Among them, the number of intermediate plates 220 can be arbitrary. For example, the number of intermediate plates 220 can be two, three, four, five, six, etc. The embodiment of the present application does not limit the specific number of intermediate plates 220, nor is it limited to the above examples.

[0079] The following description will be made by taking the specific number of the intermediate plates 220 as four as an example.

[0080] See attached Figure 1 and attached Figure 2 As shown, further, the front plate 210 may be provided with a plurality of through holes 211, and the plurality of through holes 211 may be arranged at intervals. The specific number of the through holes 211 may be arbitrary, and for example, the specific number of the through holes 211 may be two, three, four, five, six, etc. The embodiment of the present application does not limit the specific number of the through holes 211, nor is it limited to the above examples.

[0081] The following description takes the case where the number of the through holes 211 is three as an example, and the three through holes 211 can be arranged in a central area of ​​the front plate 210 at intervals.

[0082] See attached Figure 1 and attached Figure 2As shown, it can be understood that the four middle plates 220 can be arranged between the front plate 210 and the support plate 230 at intervals, and can be arranged to avoid the two through holes 211. Specifically, two of the middle plates 220 can be arranged at opposite ends of the front plate 210 to avoid the through holes 211 near the edge; the other two middle plates 220 can be located between two adjacent through holes 211 to avoid the through holes 211 located in the center area. That is, the through hole 211 of the front plate 210 is arranged between any two adjacent middle plates 220, so that the through hole 211 can be connected to the interval area between the two adjacent middle plates 220.

[0083] Further, the plurality of intermediate plates 220 are all located between the front plate 210 and the support plate 230, so that the support plate 230, the front plate 210 and the plurality of intermediate plates 220 can together form a mounting cavity 201 for placing the power supply components. The number of mounting cavities 201 corresponds to the number of intermediate plates 220, that is, when the number of intermediate plates 220 is four, the number of mounting cavities 201 can be three, and the three mounting cavities 201 are separated by four intermediate plates 220.

[0084] Refer to the attached Figure 1 and attached Figure 2 As shown, as an optional embodiment, the expansion member 200 also includes a positioning plate 240 connected to the front plate 210, the positioning plate 240 is located between the front plate 210 and the support plate 230, the extension direction of the positioning plate 240 intersects with the extension direction of the front plate 210, the positioning plate 240 has a limiting hole 241 corresponding to the middle plate 220, and the middle plate 220 is located in the limiting hole 241.

[0085] It can be understood that the angle between the extension direction of the positioning plate 240 and the extension direction of the front plate 210 can be arbitrary. For example, the angle between the extension direction of the positioning plate 240 and the extension direction of the front plate 210 can be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, etc. The embodiment of the present application does not limit the specific angle between the extension direction of the positioning plate 240 and the extension direction of the front plate 210, nor is it limited to the above examples.

[0086] The following description is made by taking the example that the angle between the extending direction of the positioning plate 240 and the extending direction of the front plate 210 is 90°, that is, the positioning plate 240 is perpendicular to the front plate 210 .

[0087] Furthermore, the positioning plate 240 and the front plate 210 may be an integral part, for example, the positioning plate 240 and the front plate 210 may be prepared by sheet metal stamping and bending.

[0088] It can be understood that the shape of the limiting hole 241 can be adapted to the shape of the middle plate 220. In this way, the limiting hole 241 can be used to position the middle plate 220 and limit the movement of the middle plate 220 to ensure the position of the middle plate 220, thereby ensuring that the installation cavity 201 can accommodate electrical components more stably, thereby ensuring the normal operation of the battery cells and the battery pack.

[0089] As an optional embodiment, a plurality of first protrusions 231 arranged at intervals are provided on one side of the front plate 210 close to the middle plate 220 or on one side of the support plate 230 close to the middle plate 220. It is understandable that the first protrusions 231 may be provided only on one side of the front plate 210 close to the middle plate 220, or may be provided only on one side of the support plate 230 close to the middle plate 220. The embodiment of the present application is not limited to this, nor is it limited to the above examples.

[0090] Refer to the attached Figure 2 As shown, the following description is made by taking an example that the first protrusion 231 is only provided on one side of the support plate 230 close to the middle plate 220 .

[0091] It should be noted that the number of the first protrusions 231 can be arbitrary. For example, the number of the first protrusions 231 can be two, three, four, five, six, etc. The embodiments of the present application do not limit the specific number and are not limited to the above examples.

[0092] The following description will be made by taking the specific number of the first protrusions 231 as three as an example, that is, the three first protrusions 231 are arranged at intervals. Figure 2 As shown, further, a clamping groove 202 is formed between two adjacent first protrusions 231 , and the middle plate 220 has a clamping portion 221 corresponding to the clamping groove 202 , and the clamping portion 221 is located in the clamping groove 202 .

[0093] It is understandable that when there are three first protrusions 231 , the three first protrusions 231 can form two spaced apart clamping grooves 202 . The middle plate 220 can have two spaced apart clamping portions 221 , and the two clamping portions 221 can be located in the clamping grooves 202 formed by the first protrusions 231 .

[0094] Through the above arrangement, the moving direction of the middle plate 220 between the front plate 210 and the support plate 230 can be limited, thereby ensuring the position of the middle plate 220, thereby ensuring that the installation cavity 201 can accommodate electrical components more stably, thereby ensuring the normal operation of the battery cells and the battery pack.

[0095] As an optional implementation, the battery box 10 further includes at least two support members 300 .

[0096] It should be noted that the number of support members 300 can be arbitrary. For example, the number of support members 300 can be two, three, four, five, six, etc. The embodiment of the present application does not limit the specific number of support members 300, nor is it limited to the above examples.

[0097] The following description will be made by taking the case where the number of the supporting members 300 is two as an example.

[0098] In some embodiments, at least two support members 300 are disposed on the side of at least two side panels 120 facing the accommodating cavity 101. When there are three side panels 120 and two support members 300, the two support members 300 can be located on any two side panels 120 and facing the accommodating cavity 101, so that the support members 300 can contact the battery cells to support the battery cells in the cavity, thereby improving the supporting effect on the battery cells.

[0099] Refer to the attached Figure 1 -Attached Figure 3 As shown, in some other embodiments, one of the support members 300 is disposed on the side of the expansion member 200 facing the accommodating cavity 101, and the remaining number of support members 300 are disposed on the side of at least two side plates 120 facing the accommodating cavity 101. When there are three side plates 120 and two support members 300, one of the support members 300 can be located on the expansion member 200 and facing the accommodating cavity 101, and the other support member 300 can be located on one of the side plates 120 and facing the accommodating cavity 101, so that the support member 300 can contact the battery cell to support the battery cell in the cavity, thereby improving the supporting effect on the battery cell.

[0100] The embodiment of the present application does not limit the specific position of the above-mentioned support member 300, nor is it limited to the above-mentioned example.

[0101] The following description takes as an example that one of the support members 300 is disposed on the side of the expansion member 200 facing the accommodating cavity 101, and the remaining number of support members 300 are disposed on the side of at least two side panels 120 facing the accommodating cavity 101. In this case, the side panel 120 provided with the support member 300 can be disposed adjacent to the expansion member 200, or can be disposed opposite to the expansion member 200.

[0102] The following description will be made by taking the side plate 120 provided with the support member 300 and the expansion member 200 as an example in which they are arranged opposite to each other.

[0103] Refer to the attached Figure 1 -Attached Figure 3As shown, as an optional embodiment, when one of the support members 300 is arranged on the side of the expansion member 200 facing the accommodating cavity 101, and the remaining number of support members 300 are arranged on the side of at least two side panels 120 facing the accommodating cavity 101, the support member 300 includes a main board 310 and a second protrusion 320 arranged on the main board 310.

[0104] One of the main boards 310 is arranged on the side of the expansion piece 200 facing the accommodating cavity 101 , the remaining main boards 310 are arranged on the side of at least two side boards 120 facing the accommodating cavity 101 , and the second protrusion 320 is arranged on the side of the main board 310 facing the accommodating cavity 101 .

[0105] Refer to the attached Figure 1 -Attached Figure 3 As shown, when there are two support members 300, one of the main boards 310 can be located on the expansion member 200 and facing the accommodating cavity 101, and the other main board 310 can be located on one of the side panels 120 and facing the accommodating cavity 101, so that the support member 300 can contact the battery cell to support the battery cell located in the cavity and enhance the supporting effect on the battery cell.

[0106] Furthermore, there are multiple second protrusions 320 , which are arranged at intervals along the extension direction of the mainboard 310 , and two adjacent second protrusions 320 together form a first groove 330 for clamping the battery cell.

[0107] It should be noted that the number of second protrusions 320 can be arbitrary. For example, the number of second protrusions 320 can be two, three, four, five, six, seven, etc. The embodiment of the present application does not limit the number of second protrusions 320, nor is it limited to the above examples.

[0108] As an optional implementation, the main board 310 and the second protrusion 320 are an integrated piece, that is, the support member 300 is an integrated piece, which can enhance the structural strength of the support member 300 to enhance the installation stability of the battery cell.

[0109] Furthermore, the main board 310 is detachably connected to the side plate 120 or the expansion member 200, that is, the support member 300 is detachably connected to the side plate 120 or the expansion member 200. In this way, it is convenient to replace different support members 300, and the support members 300 can be adjusted according to actual conditions, which can improve the versatility of the support members 300 and reduce costs.

[0110] As another optional embodiment, the main board 310, the second protrusion 320 and the side plate 120 or the expansion member 200 are an integral part, that is, the support member 300 and the support plate 230 of the side plate 120 or the expansion member 200 are integrally formed, which can enhance the structural strength of the battery box 10 and improve the sealing performance of the battery box 10 to avoid cavity leakage, and has better safety performance.

[0111] Refer to the attached Figure 1 and attached Figure 2 As shown, as an optional embodiment, the battery box 10 also includes a protection plate 400 .

[0112] There are multiple protective plates 400. It should be noted that the number of protective plates 400 can be arbitrary, and for example, the number of protective plates 400 can be two, three, four, five, six, seven, etc. The embodiment of the present application does not limit the number of protective plates 400, nor is it limited to the above examples.

[0113] Further, along the extension direction of the side plate 120, a plurality of protective plates 400 are arranged at intervals on the side plate 120 provided with the support member 300, and two adjacent protective plates 400 jointly form a second groove 500 for clamping the battery cell, and the second groove 500 is arranged correspondingly to the first groove 330 and is connected to each other. It can be understood that the number of the first groove 330 and the second groove 500 is the same to accommodate the battery cell together.

[0114] Through the above arrangement, the protection plate 400 can be used to form a second groove 500 for accommodating the battery cell, so as to improve the installation stability of the battery cell and further ensure the normal use of the battery cell.

[0115] In addition, the liquid cooling plate 110 , the protective plate 400 , and at least two side plates 120 are all aluminum plates. In the embodiment of the present application, the liquid cooling plate 110 , multiple protective plates 400 , and three side plates 120 are all aluminum plates.

[0116] Furthermore, the liquid cooling plate 110, the protective plate 400 and at least two side plates 120 are prepared by an aluminum extrusion process, that is, the liquid cooling plate 110, the plurality of protective plates 400 and the three side plates 120 are prepared by an aluminum extrusion process. Through the above arrangement, the preparation process of the box body 100 is relatively simple and the cost is relatively low, which can reduce the cost of the battery box 10 and the battery pack; in addition, through the above arrangement, the box body 100 has fewer welds, which can reduce the risk of leakage, thereby ensuring the normal use of the battery cell and the battery pack.

[0117] In the description of the embodiments of the present application, it should be understood that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the connection of the structures inside two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0118] The terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In the description of the present application, "plurality" means two or more, unless otherwise specified.

[0119] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for the structural or complete structural technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery box for accommodating a battery cell, characterized in that: The battery box includes a box body and an expansion member. The box body includes a liquid cooling plate and at least two side plates, and the at least two side plates are connected in sequence and are both connected to the liquid cooling plate; The expansion member is connected to the liquid cooling plate and is connected between two of the side plates. The expansion member, the liquid cooling plate and at least two of the side plates together form a receiving cavity for receiving the battery cell. The liquid cooling plate and at least two of the side plates are integrally formed.

2. The battery box according to claim 1, characterized in that: The liquid cooling plate and at least two of the side plates are aluminum plates, and the liquid cooling plate and at least two of the side plates are prepared by an aluminum extrusion process.

3. The battery box according to claim 1, characterized in that: The expansion member comprises a front plate, a middle plate and a support plate, wherein the middle plate is located between the front plate and the support plate, the front plate is located on a side of the middle plate away from the accommodating cavity, and the support plate faces the accommodating cavity.

4. The battery box according to claim 3, characterized in that: The front plate is provided with a through hole, and there are multiple intermediate plates; the multiple intermediate plates are arranged to avoid the through hole and are arranged at intervals, and the front plate, the support plate and the multiple intermediate plates together form an installation cavity for placing the power supply components.

5. The battery box according to claim 4, characterized in that: The expansion member also includes a positioning plate connected to the front plate, the positioning plate is located between the front plate and the support plate, the extension direction of the positioning plate intersects with the extension direction of the front plate, the positioning plate has a limiting hole corresponding to the middle plate, and the middle plate is located in the limiting hole.

6. The battery box according to claim 4, characterized in that: A plurality of first protrusions arranged at intervals are provided on one side of the front plate close to the middle plate or on one side of the support plate close to the middle plate, and a clamping groove is formed between two adjacent first protrusions; The middle plate has a clamping portion corresponding to the clamping slot, and the clamping portion is located in the clamping slot.

7. The battery case according to any one of claims 1 to 6, characterized in that: Also included are at least two support members; At least two of the support members are disposed on a side of at least two of the side plates facing the accommodating cavity; And / or, one of the support members is arranged on a side of the expansion member facing the accommodating cavity, and the remaining number of the support members are arranged on a side of at least two of the side plates facing the accommodating cavity.

8. The battery case according to claim 7, characterized in that: When one of the support members is disposed on the side of the expansion member facing the accommodating cavity, and the remaining number of the support members are disposed on the side of at least two of the side plates facing the accommodating cavity, The support member includes a main board and a second protrusion disposed on the main board, wherein one of the main boards is disposed on a side of the expansion member facing the accommodating cavity, and the remaining number of the main boards are disposed on a side of at least two of the side boards facing the accommodating cavity, and the second protrusion is disposed on a side of the main board facing the accommodating cavity; There are multiple second protrusions, and the multiple second protrusions are arranged at intervals along the extension direction of the mainboard. Two adjacent second protrusions jointly form a first groove for clamping the battery cell.

9. The battery case according to claim 8, characterized in that: Also includes a protection plate, the number of the protection plates is multiple; Along the extension direction of the side plate, a plurality of the protection plates are arranged at intervals on the side plate provided with the support member, and two adjacent protection plates jointly form a second groove for clamping the battery cell, and the second groove is arranged corresponding to the first groove and is connected to each other; The liquid cooling plate, the protection plate, and at least two of the side plates are all aluminum plates, and the liquid cooling plate, the protection plate, and at least two of the side plates are prepared by an aluminum extrusion process.

10. A battery pack, characterized in that: It comprises a battery cell and a battery case as claimed in any one of claims 1 to 9, wherein the battery cell is located in the battery case.

Images