Battery box body assembly and battery

Abstract

The invention discloses a battery box body assembly and a battery, the battery box body assembly comprises a box body bottom plate and a frame body mounted on the box body bottom plate, and the frame body is provided with a supporting beam assembly and a plurality of carrying pieces; the frame body comprises a front edge beam, a rear edge beam and two side edge beams, wherein the front edge beam and the rear edge beam are oppositely arranged, and the two side edge beams are connected with the front edge beam and the rear edge beam. The supporting beam in the frame body is composed of the front cross beam, the rear cross beam and at least one longitudinal beam, the front cross beam is installed at the end, close to the front edge beam, in the frame body, the rear cross beam is installed at the end, close to the rear edge beam, in the frame body, and the longitudinal beam is connected between the front cross beam and the rear cross beam. The strength in the front-back direction and the left-right direction of the front end and the rear end of the battery pack box body is ensured; in addition, a plurality of carrying pieces are connected to the outer side of each side edge beam at intervals, and when the battery is collided in the left-right direction, the carrying pieces crumple and deform to absorb energy, so that the battery box body meets the collision requirement, meanwhile, the overall structure is simple, and the light weight requirement of the box body is met.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a battery box assembly and a battery. Background Art

[0002] The mainstream power battery box adopts aluminum extrusion technology, and in order to meet the requirements of collision and extrusion conditions, the mainstream solution in the industry is to meet the requirements by strengthening the box structure, including setting more cross beams and longitudinal beams and higher-strength box mounting structures. This has led to the current problems of excessive box mass and reduced battery energy density. Summary of the invention

[0003] The purpose of the present application is to overcome the deficiencies of the prior art and to provide a battery box assembly and a battery that can meet the requirements of collision and extrusion conditions while achieving lightweight and ensuring battery energy density.

[0004] The technical solution of the present application provides a battery box assembly, comprising a box bottom plate and a frame mounted on the box bottom plate, wherein a support beam assembly and a plurality of mounting parts are mounted on the frame;

[0005] The frame includes a front side beam and a rear side beam that are arranged opposite to each other, and two side beams that connect the front side beam and the rear side beam;

[0006] The support beam assembly is composed of a front cross beam, a rear cross beam and at least one longitudinal beam. The front cross beam is installed in the frame at one end close to the front side beam, the rear cross beam is installed in the frame at one end close to the rear side beam, the longitudinal beam is connected between the front cross beam and the rear cross beam, and a plurality of the supporting parts are connected to the outer side of each side beam at intervals.

[0007] Furthermore, a buffer space is reserved between the rear cross beam and the rear side beam, and a plurality of energy absorbing members are installed in the buffer space. The energy absorbing members are arranged at intervals along the length direction of the rear cross beam.

[0008] Further, the energy absorbing member comprises an upper ring portion and a lower ring portion, the upper ring portion comprises an upper main plate and upper side plates extending from both sides of the upper main plate toward the lower ring portion, and the lower ring portion comprises a lower main plate and lower side plates extending from both sides of the lower main plate toward the upper ring portion;

[0009] The two upper side plates and the two lower side plates are connected one by one, and an axially penetrating energy-absorbing cavity is formed between the upper ring portion and the lower ring portion. The axial ends of the energy-absorbing member are respectively connected to the rear cross beam and the rear side beam.

[0010] Furthermore, the mounting member includes a connecting portion connected to the side beam, a mounting portion for connecting to the vehicle body, and a collapse portion connected between the connecting portion and the mounting portion, and the collapse portion collapses and deforms when the battery pack is hit.

[0011] Furthermore, the mounting member is a hollow structure formed by connecting an upper sheet portion and a lower sheet portion;

[0012] The upper sheet portion includes an upper carrying section, an upper collapse section and an upper connecting section, wherein the width of the upper collapse section is smaller than that of the upper carrying section and the upper connecting section;

[0013] The lower sheet portion includes a lower carrying section, a lower collapsed section and a lower connecting section, wherein the width of the lower collapsed section is smaller than that of the lower carrying section and the lower connecting section;

[0014] The upper carrying section is connected to the lower carrying section, the upper connecting section is connected to the lower connecting section, the upper carrying section and the lower carrying section form the carrying portion, the upper connecting section and the lower connecting section form the connecting portion, and the upper collapse section and the lower collapse section form the collapse portion.

[0015] Further, the upper mounting section includes an upper mounting main board and two upper mounting side boards extending from both sides of the upper mounting main board toward the lower sheet portion, and the upper collapse section extends from the front end of the upper mounting main board;

[0016] The lower mounting section includes a lower mounting main board and two lower mounting side boards extending from both sides of the lower mounting main board toward the upper sheet portion, and the lower collapse section extends from the front end of the lower mounting main board;

[0017] The two upper mounting side panels and the two lower mounting side panels are connected in a one-to-one correspondence.

[0018] Further, the connecting portion includes a connecting body connected to the collapsed portion and a welding claw extending from the connecting body;

[0019] In the direction from the collapsed portion to the welding claw, the height direction of the connecting body gradually increases, and the end of the welding claw is welded to the side beam.

[0020] Further, the upper connecting section comprises an upper connecting main board extending from the front end of the upper collapse section and two upper connecting side boards extending from both sides of the upper connecting main board toward the lower sheet portion;

[0021] The lower connecting section includes a lower connecting main plate extending from the front end of the lower collapsing section and two lower connecting side plates extending from both sides of the lower connecting main plate toward the upper sheet portion;

[0022] The two upper connection side plates and the two lower connection side plates are connected one by one to form the connection body;

[0023] An upper main welding section is extended from the front end of the upper connecting main board, an upper side welding section is extended from the front end of the upper connecting side plate, a lower main welding section is extended from the front end of the lower connecting main board, and a lower side welding section is extended from the front end of the lower connecting side plate. The upper side welding section is connected to the lower side welding section in a one-to-one correspondence, and the upper main welding section, the upper side welding section, the lower main welding section and the lower side welding section form the welding claw.

[0024] Furthermore, the box bottom plate includes a bottom guard plate and a cold plate provided with a cooling channel, a protruding interface plate is provided at the front end of the cold plate, and a refrigerant transfer interface communicating with the cooling channel is provided on the interface plate.

[0025] An interface shield is provided at the front end of the front side beam, the interface shield is connected to the interface plate, and the refrigerant transfer interface is installed in the interface shield.

[0026] The technical solution of the present application also provides a battery, including the battery case assembly as described above.

[0027] After adopting the above technical solution, the following beneficial effects are achieved:

[0028] In the present application, the support beam assembly in the frame is composed of a front crossbeam, a rear crossbeam and at least one longitudinal beam, wherein the longitudinal beam is connected between the front crossbeam and the rear crossbeam, thereby ensuring the strength of the battery pack body in the front-to-back direction and the left-to-right direction of the front and rear ends. A number of supporting parts are connected at intervals on the outer sides of the side beams of the frame. When the battery is hit in the left and right directions, the supporting parts collapse and deform to absorb energy, so that the battery box meets the collision requirements. At the same time, the overall structure is simple, which meets the lightweight requirements of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The disclosure of the present application will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In the drawings:

[0030] Figure 1 It is a structural schematic diagram of a battery box assembly in one embodiment of the present application;

[0031] Figure 2 is an exploded view of a battery box assembly in one embodiment of the present application;

[0032] Figure 3 is a schematic structural diagram of an energy absorbing member in one embodiment of the present application;

[0033] Figure 4 It is a structural schematic diagram of a mounting member in one embodiment of the present application;

[0034] Figure 5 is an exploded view of a mounting member in one embodiment of the present application;

[0035] Figure 6 is a top view of a mounting member in one embodiment of the present application;

[0036] Figure 7 is a side view of a mounting member in one embodiment of the present application;

[0037] Figure 8 This is a schematic diagram of a structure in which a mounting member is connected to a frame in an embodiment of the present application;

[0038] Fig. 9 This is a schematic diagram of the structure of the refrigerant transfer interface in one embodiment of the present application;

[0039] Fig.10 is a cross-sectional view of a refrigerant transfer interface in one embodiment of the present application;

[0040] Fig.11 It is a structural schematic diagram of a battery box assembly in another embodiment of the present application.

[0041] Reference table of reference numerals:

[0042] Box bottom plate 1:

[0043] Cold plate 09: interface plate 91, refrigerant transfer interface 92, L-shaped pipe 921;

[0044] Bottom guard plate 010;

[0045] Frame 2:

[0046] Mounting part 01: connecting part 101, mounting part 102, crushing part 103, connecting part 104, upper sheet part 11, upper mounting main board 111, upper mounting side plate 112, upper crushing section 113, upper connecting main board 114, upper connecting side plate 115, upper main welding section 116, upper side welding section 117, lower sheet part 12, lower mounting main board 121, lower mounting side plate 122, lower crushing section 123, lower connecting main board 124, lower connecting side plate 125, lower main welding section 126, lower side welding section 127;

[0047] Front side beam 02: interface shield 21, avoidance hole 211;

[0048] Rear beam 03, side beam 04, front cross beam 05, rear cross beam 06, longitudinal beam 07;

[0049] Energy absorbing member 08 includes an upper ring portion 81 , an upper main plate 811 , an upper side plate 812 , a lower ring portion 82 , a lower main plate 821 , a lower side plate 822 , and an annular groove 83 . DETAILED DESCRIPTION

[0050] The specific implementation of the present application is further described below with reference to the accompanying drawings.

[0051] It is easy to understand that according to the technical solution of the present application, without changing the essential spirit of the present application, a variety of structural modes and implementation modes that can be replaced by those skilled in the art can be replaced with each other. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present application, and should not be regarded as the entirety of the present application or as a limitation or restriction on the technical solution of the application.

[0052] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to their different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0053] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above-mentioned in this application can be understood according to the specific circumstances.

[0054] Battery box assembly:

[0055] The battery box assembly in the embodiment of the present application is as follows: Figure 1 , 2 As shown, it includes a box bottom plate 1 and a frame 2 installed on the box bottom plate 1, and a support beam assembly and a plurality of mounting parts 01 are installed on the frame 2;

[0056] The frame 2 includes a front side beam 02 and a rear side beam 03 which are arranged opposite to each other, and two side beams 04 which connect the front side beam 02 and the rear side beam 03;

[0057] The support beam assembly is composed of a front cross beam 05, a rear cross beam 06 and at least one longitudinal beam 07. The front cross beam 05 is installed in the frame 2 at one end close to the front side beam 02, and the rear cross beam 06 is installed in the frame 2 at one end close to the rear side beam 03. The longitudinal beam 07 is connected between the front cross beam 05 and the rear cross beam 06. A plurality of supporting parts 01 are connected to the outer side of each side beam 04 at intervals.

[0058] The battery box assembly is made of steel or aluminum through a rolling process. Specifically, the box bottom plate 1 serves as the bottom support, and a cooling channel is provided inside it, and the battery cells are placed on the box bottom plate 1. The frame 2 is installed on the box bottom plate 1 to play a side support role. The box bottom plate 1 is generally set in a square shape, and the frame 2 is surrounded by four side beams, namely the front side beam 02, the rear side beam 03 and two side beams 04. The four side beams are vertically installed on the four sides of the box bottom plate 1.

[0059] In order to meet the collision and extrusion requirements of the battery box, a support beam assembly is provided in the frame 2 to support the frame 2. When the battery box is hit, the support beam assembly can play a supporting role to prevent the internal battery cells from being damaged. In the prior art, in order to ensure the strength of the battery box, more support beams are provided. Although this meets the strength requirements, it greatly increases the weight of the battery box and also affects the layout space of the battery cells.

[0060] In the embodiment of the present application, the support beam assembly is composed of a front cross beam 05, a rear cross beam 06 and at least one longitudinal beam 07. Figure 1 The schematic diagram of the structure with two longitudinal beams 07 is shown, wherein the front cross beam 05 is installed at one end of the front side beam 02 and is arranged parallel to the front side beam 02, the rear cross beam 06 is installed at one end of the rear side beam 03 and is arranged parallel to the rear side beam 03, and the two longitudinal beams 07 are vertically connected between the front cross beam 05 and the rear cross beam 06, and the support beam assembly forms a "Ⅱ" type structure. Preferably, the two longitudinal beams 07 evenly divide the space between the front cross beam 05 and the rear cross beam 06 into three equal parts, so that the supporting capacity of the longitudinal beams 07 remains balanced.

[0061] The above structure of the support beam assembly, the front cross beam 05 and the rear cross beam 06 ensure the support strength of the front and rear ends of the battery box in the left and right directions, and the longitudinal beam 07 ensures the support strength of the battery box in the front and rear directions.

[0062] In addition, the outer surface of the side beam 04 of the frame 2 is connected with a plurality of mounting members 01 at intervals. The mounting members 01 are evenly arranged along the length direction of the side beam 04, and the mounting members 01 are used to connect the vehicle body. By providing a structure with a plurality of mounting members 01, when the battery is hit in the left and right directions, the mounting members 01 can absorb energy and collapse and deform, thereby protecting the internal battery cells.

[0063] It should be noted that, according to design requirements such as battery performance, the number of longitudinal beams 07 can be set to one or more than two. Fig.11 The battery box assembly structure is shown with a longitudinal beam 07.

[0064] The battery box assembly of the embodiment of the present application, the support beam component in the frame 2 is composed of a front cross beam 05, a rear cross beam 06 and at least one longitudinal beam 07, wherein the longitudinal beam 07 is connected between the front cross beam 05 and the rear cross beam 06, ensuring the strength of the battery pack box in the front-to-back direction and the left-to-right direction of the front and rear ends, and a plurality of supporting parts 01 are connected to the outer side of the side beams 04 of the frame 2 at intervals. When the left and right directions of the battery are collided, the supporting parts 01 collapse and deform to absorb energy, so that the battery box meets the collision requirements. At the same time, the overall structure is simple, which meets the lightweight requirements of the box.

[0065] In one embodiment, if Figure 1 , 2 As shown, a buffer space is reserved between the rear cross beam 06 and the rear side beam 03 , and a plurality of energy absorbing members 08 are installed in the buffer space. The energy absorbing members 08 are arranged at intervals along the length direction of the rear cross beam 06 .

[0066] Specifically, the rear cross beam 06 is arranged in parallel with the rear side beam 03, and a buffer space is reserved between the two. The energy absorbing members 08 are arranged evenly spaced along the length direction of the rear cross beam 06. The energy absorbing members 08 are arranged as a hollow columnar structure (see Figure 3 ), the axial ends of each energy absorbing member 08 are respectively connected to the rear cross beam 06 and the rear side beam 03.

[0067] The present application arranges a plurality of energy-absorbing members 08 in the buffer space between the rear cross beam 06 and the rear side beam 03. When the battery pack is hit in the front-to-rear direction, the energy-absorbing members 08 in the buffer space can absorb energy and deform. Combined with the longitudinal beam 07, there are two layers of buffering, thereby further improving the strength of the battery box in the front-to-rear direction.

[0068] In one embodiment, if Figure 3 As shown, the energy absorbing member 08 includes an upper ring portion 81 and a lower ring portion 82, the upper ring portion 81 includes an upper main plate 811 and upper side plates 812 extending from both sides of the upper main plate 811 toward the lower ring portion 82, and the lower ring portion 82 includes a lower main plate 821 and lower side plates 822 extending from both sides of the lower main plate 821 toward the upper ring portion 81;

[0069] The two upper side plates 812 and the two lower side plates 822 are connected one by one to form an axially through energy absorbing cavity 83 between the upper ring portion 81 and the lower ring portion 82. The axial ends of the energy absorbing member 08 are respectively connected to the rear cross beam 06 and the rear side beam 03.

[0070] Specifically, the energy absorbing member 08 is formed by an upper ring portion 81 and a lower ring portion 82, and the upper side plate 812 and the lower side plate 822 are partially overlapped and then welded together. Compared with the one-piece molding structure, the energy absorbing member 08 of the present application is more likely to deform when subjected to collision energy absorption, thereby absorbing more collision energy and effectively protecting the internal battery cells.

[0071] Preferably, at least one upper groove is provided on the upper ring portion 81, and at least one lower groove is provided on the lower ring portion 82. After the upper ring portion 81 and the lower ring portion 82 are connected, an upper groove and a lower groove match to form an annular groove 83 arranged along the circumference of the energy absorbing member 08. The setting of the annular groove 83 also further improves the buffering effect of the energy absorbing member 08.

[0072] In one embodiment, if Figure 4 As shown, the mounting part 01 includes a connecting portion 101 connected to the side beam 04, a mounting portion 102 for connecting to the vehicle body, and a crushing portion 103 connected between the connecting portion 101 and the mounting portion 102. The crushing portion 103 is crushed and deformed when the battery pack is hit.

[0073] The mounting portion 102 is used to install the connecting member 104 and connect it to the vehicle body. Figure 4 The middle mounting part 102 is provided with a mounting hole, and the connecting part 104 is a sleeve structure. The connecting part 101 is welded to the side beam 04, and the strength of the collapsing part 103 is smaller than that of the connecting part 101 and the mounting part 102. When the battery is hit in the left and right directions, the collapsing part 103 can be deformed first, and while ensuring the connection strength between the mounting part 01, the side beam 04 and the vehicle body, the mounting part 01 can be deformed to absorb the collision energy.

[0074] In one embodiment, if Figure 4 , Figure 5 As shown, the mounting member 01 is a hollow structure formed by connecting an upper sheet portion 11 and a lower sheet portion 12;

[0075] The upper sheet portion 11 includes an upper carrying section, an upper collapse section and an upper connecting section, and the width of the upper collapse section is smaller than that of the upper carrying section and the upper connecting section;

[0076] The lower sheet portion 12 includes a lower carrying section, a lower collapse section and a lower connecting section, and the width of the lower collapse section is smaller than that of the lower carrying section and the lower connecting section;

[0077] The upper carrying section is connected to the lower carrying section, the upper connecting section is connected to the lower connecting section, the upper carrying section and the lower carrying section form a carrying portion 102, the upper connecting section and the lower connecting section form a connecting portion 101, and the upper collapsed section and the lower collapsed section form a collapsed portion 103.

[0078] In the embodiment of the present application, the carrier 01 is welded by the upper sheet 11 and the lower sheet 12, and its interior is a hollow structure. When the carrier 01 is hit, the carrier 01 absorbs energy and collapses and deforms. The upper sheet 11 and the lower sheet 12 can absorb energy by cracking the welding surface, thereby absorbing more collision energy and protecting the internal battery cells. The upper sheet 11 and the lower sheet 12 both include a carrier section, a collapse section and a connection section, wherein the width of the collapse section is smaller than that of the carrier section and the connection section. When the carrier 01 is hit by an external force, the collapse section with weaker strength collides first.

[0079] Preferably, if Figure 6 As shown, the width of the internal cavity of the connecting portion 101 is greater than the width of the mounting portion 102 . When the mounting part 01 collides and collapses, the mounting part 102 can collapse into the internal cavity of the connecting portion 101 , thereby improving the energy absorption capacity of the mounting part 01 .

[0080] In one embodiment, if Figure 5 As shown, the upper mounting section includes an upper mounting main board 111 and two upper mounting side boards 112 extending from both sides of the upper mounting main board 111 toward the lower sheet portion, and an upper collapse section 113 extends from the front end of the upper mounting main board 111;

[0081] The lower mounting section includes a lower mounting main board 121 and two lower mounting side panels 122 extending from both sides of the lower mounting main board 121 toward the upper sheet portion, and a lower collapse section 123 extending from the front end of the lower mounting main board 121;

[0082] The two upper mounting side panels 112 and the two lower mounting side panels 122 are connected in a one-to-one correspondence.

[0083] Specifically, the upper mounting section is formed of an upper mounting main board 111 and an upper mounting side plate 112 to form a U-shaped structure, and the lower mounting section is formed of a lower mounting main board 121 and a lower mounting side plate 122 to form a U-shaped structure symmetrical with the upper mounting section, and the upper mounting side plate 112 and the lower mounting side plate 122 are partially overlapped and welded. The upper crushed section 113 extends from the front end of the upper mounting main board 111, and the width of the upper crushed section 113 is smaller than the width of the upper mounting main board 111; similarly, the lower crushed section 123 extends from the front end of the lower mounting main board 121, and the width of the lower crushed section 123 is smaller than the width of the lower mounting main board 121.

[0084] In one embodiment, the connection portion 101 includes a connection body connected to the collapse portion 103 and a welding claw extending from the connection body;

[0085] like Figure 7 As shown in FIG. 1 , in the direction from the collapsed portion 103 to the welding claw, the height direction of the connection body gradually increases. Figure 8 As shown, the end of the welding claw is welded to the side beam 04 .

[0086] From the side of the mounting part 01, the height of the connection body gradually increases from the collapsed part 103 to the welding claw, and the welding claw extends from the end of the connection body, and the height of the welding claw is consistent with the height of the end of the connection body. The embodiment of the present application increases the size of the welding claw by setting the height of the connection body to a gradual structure, improves the connection strength between the mounting part 01 and the side beam 04, and makes the collapsed part 103 the weakest position in the mounting part 01, so that the collapse deformation occurs first.

[0087] In one embodiment, if Figure 5 As shown, the upper connecting section includes an upper connecting main board 114 extending from the front end of the upper collapse section 113 and two upper connecting side boards 115 extending from both sides of the upper connecting main board 114 toward the lower sheet portion 12;

[0088] The lower connecting section includes a lower connecting main plate 124 extending from the front end of the lower collapsing section 123 and two lower connecting side plates 125 extending from both sides of the lower connecting main plate 124 toward the upper sheet portion 11;

[0089] The two upper connecting side plates 115 and the two lower connecting side plates 125 are connected one by one to form a connecting body;

[0090] An upper main welding section 116 is extended from the front end of the upper connecting main board 114, an upper side welding section 117 is extended from the front end of the upper connecting side plate 115, a lower main welding section 126 is extended from the front end of the lower connecting main board 124, and a lower side welding section 127 is extended from the front end of the lower connecting side plate 125. The upper side welding section 117 is connected to the lower side welding section 127 in a one-to-one correspondence, and the upper main welding section 116, the upper side welding section 117, the lower main welding section 126 and the lower side welding section 127 form a welding claw.

[0091] Specifically, the upper connecting section is a U-shaped structure composed of an upper connecting main board 114 and two upper connecting side panels 115, and the lower connecting section is a U-shaped structure symmetrical to the upper connecting section composed of a lower connecting main board 124 and two lower connecting side panels 125, and the upper connecting side panels 115 and the lower connecting side panels 125 are partially overlapped and welded.

[0092] The welding claw extends from the front end of the connection body, the width of the upper main welding section 116 is smaller than the width of the upper connection main board 114, and the width of the upper side welding section 117 is smaller than the width of the upper connection side plate 115. Similarly, the width of the lower main welding section 126 is smaller than the width of the lower connection main board 124, and the width of the lower side welding section 127 is smaller than the width of the lower connection side plate 125. The upper side welding section 117 is welded to the lower side welding section 127. In one embodiment, as Figure 2 , 9 As shown in FIG. 10 , the box bottom plate 1 includes a bottom guard plate 010 and a cold plate 09 provided with a cooling channel. A protruding interface plate 91 is provided at the front end of the cold plate 09. A refrigerant transfer interface 92 communicating with the cooling channel is provided on the interface plate 91.

[0093] An interface shield 21 is provided at the front end of the front side beam 02 . The interface shield 21 is connected to the interface plate 91 , and the refrigerant transfer interface 92 is installed in the interface shield 21 .

[0094] Specifically, the bottom guard plate 010 serves as the bottom support of the battery box assembly, a cooling channel is provided in the cold plate 09, the inlet and outlet of the cooling channel converge at the interface plate 91, and a refrigerant transfer interface 92 is provided on the interface plate 91. Fig.10 As shown, two L-shaped pipes 921 are provided on the refrigerant transfer interface 92, which are respectively connected to the inlet and outlet of the cooling channel. One end of the L-shaped pipe 921 is connected to the cooling channel, and the other end extends toward the front end. An interface structure is provided around the end extending toward the front end, and the interface structure can be selected and set according to the battery design requirements.

[0095] Corresponding to the position of the interface plate 91, an interface shield 21 is provided on the front surface of the front side beam 02, and an avoidance hole 211 is provided on the lower surface of the interface shield 21. The refrigerant transfer interface 92 is installed into the interface shield 21 through the avoidance hole 211, so that the interface shield 21 protects the refrigerant transfer interface 92.

[0096] In the embodiment of the present application, the refrigerant transfer interface 92 is formed on the interface plate 91 at the front end of the cold plate 09, and is covered by an interface shield 21 provided on the front surface of the front side beam 02. Compared with the traditional cooling interface adapter, the refrigerant transfer interface 92 in the embodiment of the present application has a small overall structure size and a small mass, and can avoid affecting the surrounding parts.

[0097] As needed, the above technical solutions can be combined to obtain the best technical effect.

[0098] Battery:

[0099] The technical solution of the present application also provides a battery, comprising the battery box assembly described in any of the aforementioned embodiments.

[0100] The battery in the embodiment of the present application includes the battery case assembly provided in the aforementioned embodiment. Since the battery in the embodiment of the present application has the same advantages as the battery case assembly provided in the aforementioned embodiment, they will not be described in detail here.

[0101] The above description is only the principle and preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this field, the implementation methods obtained by appropriately combining the technical solutions disclosed in different embodiments are also included in the technical scope of the present invention. On the basis of the principle of the present application, several other variations can be made, which should also be regarded as the protection scope of the present application.

Claims

1. A battery box assembly, characterized in that: It comprises a box bottom plate (1) and a frame (2) mounted on the box bottom plate (1), wherein a support beam assembly and a plurality of mounting parts (01) are mounted on the frame (2); The frame (2) comprises a front side beam (02) and a rear side beam (03) which are arranged opposite to each other, and two side beams (04) which connect the front side beam (02) and the rear side beam (03); The support beam assembly is composed of a front cross beam (05), a rear cross beam (06) and at least one longitudinal beam (07); the front cross beam (05) is installed in the frame (2) at one end close to the front side beam (02); the rear cross beam (06) is installed in the frame (2) at one end close to the rear side beam (03); the longitudinal beam (07) is connected between the front cross beam (05) and the rear cross beam (06); and a plurality of the supporting parts (01) are connected to the outer side of each side beam (04) at intervals.

2. The battery box assembly according to claim 1, characterized in that: A buffer space is reserved between the rear cross beam (06) and the rear side beam (03), and a plurality of energy absorbing members (08) are installed in the buffer space. The energy absorbing members (08) are arranged at intervals along the length direction of the rear cross beam (06).

3. The battery box assembly according to claim 2, characterized in that: The energy absorbing member (08) comprises an upper ring portion (81) and a lower ring portion (82), wherein the upper ring portion (81) comprises an upper main plate (811) and upper side plates (812) extending from both sides of the upper main plate (811) toward the lower ring portion (82), and the lower ring portion (82) comprises a lower main plate (821) and lower side plates (822) extending from both sides of the lower main plate (821) toward the upper ring portion (81); The two upper side plates (812) and the two lower side plates (822) are connected in a one-to-one correspondence, and an axially through energy-absorbing cavity is formed between the upper ring portion (81) and the lower ring portion (82). The axial ends of the energy-absorbing member (08) are respectively connected to the rear cross beam (06) and the rear side beam (03).

4. The battery box assembly according to claim 1, characterized in that: The mounting part (01) comprises a connecting portion (101) connected to the side beam (04), a mounting portion (102) for connecting to a vehicle body, and a collapsing portion (103) connected between the connecting portion (101) and the mounting portion (102), wherein the collapsing portion (103) collapses and deforms when the battery pack is subjected to a collision.

5. The battery box assembly according to claim 4, characterized in that: The mounting member (01) is a hollow structure formed by connecting an upper sheet (11) and a lower sheet (12); The upper sheet portion (11) comprises an upper carrying section, an upper collapsed section (113) and an upper connecting section, wherein the width of the upper collapsed section (113) is smaller than that of the upper carrying section and the upper connecting section; The lower sheet portion (12) comprises a lower carrying section, a lower collapsed section (123) and a lower connecting section, wherein the width of the lower collapsed section is smaller than that of the lower carrying section and the lower connecting section; The upper carrying section is connected to the lower carrying section, the upper connecting section is connected to the lower connecting section, the upper carrying section and the lower carrying section form the carrying portion, the upper connecting section and the lower connecting section form the connecting portion, and the upper collapse section (113) and the lower collapse section (123) form the collapse portion.

6. The battery box assembly according to claim 5, characterized in that: The upper mounting section comprises an upper mounting main board (111) and two upper mounting side boards (112) extending from both sides of the upper mounting main board (111) toward the lower sheet (12); the upper collapse section (113) extends from the front end of the upper mounting main board (111); The lower mounting section comprises a lower mounting main board (121) and two lower mounting side boards (122) extending from both sides of the lower mounting main board (121) toward the upper sheet (11), and the lower collapse section (123) extends from the front end of the lower mounting main board (121); The two upper mounting side panels (112) and the two lower mounting side panels (122) are connected in a one-to-one correspondence.

7. The battery box assembly according to claim 5, characterized in that: The connecting portion (101) comprises a connecting body connected to the collapsed portion (103) and a welding claw extending from the connecting body; In the direction from the collapsed portion (103) to the welding claw, the height direction of the connection body gradually increases, and the end of the welding claw is welded to the side beam (04).

8. The battery box assembly according to claim 7, characterized in that: The upper connecting section comprises an upper connecting main plate (114) extending from the front end of the upper collapse section (113) and two upper connecting side plates (115) extending from both sides of the upper connecting main plate (114) toward the lower sheet (12); The lower connecting section comprises a lower connecting main plate (124) extending from the front end of the lower collapsing section (123) and two lower connecting side plates (125) extending from both sides of the lower connecting main plate (124) toward the upper sheet portion (11); The two upper connection side plates (115) and the two lower connection side plates (125) are connected in a one-to-one correspondence to form the connection body; An upper main welding section (116) is extended from the front end of the upper connecting main board (114), an upper side welding section (117) is extended from the front end of the upper connecting side board (115), a lower main welding section (126) is extended from the front end of the lower connecting main board (124), and a lower side welding section (127) is extended from the front end of the lower connecting side board (125); the upper side welding section (117) is connected to the lower side welding section (127) in a one-to-one correspondence; the upper main welding section (116), the upper side welding section (117), the lower main welding section (126) and the lower side welding section (127) form the welding claw.

9. The battery box assembly according to any one of claims 1 to 8, characterized in that: The box bottom plate (1) comprises a bottom guard plate (010) and a cold plate (09) provided with a cooling channel, the front end of the cold plate (09) is provided with a protruding interface plate (91), and the interface plate (91) is provided with a refrigerant transfer interface (92) connected to the cooling channel; The front end of the front side beam (02) is provided with an interface shield (21), the interface shield (21) is connected to the interface plate (91), and the refrigerant transfer interface (92) is installed in the interface shield (21).

10. A battery, characterized in that: Comprising a battery box assembly as described in any one of claims 1-9.

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