Battery box and battery pack

Abstract

The utility model provides a battery box and a battery pack. The battery box comprises a box body frame; the reinforcing plate is vertically arranged in the box body frame in the first direction and divides the box body frame into a first accommodating space and a second accommodating space, and the first accommodating space is used for accommodating the battery pack; at least one part of the liquid cooling plate is vertically arranged in the first accommodating space along a second direction, and the second direction is perpendicular to the first direction; and the liquid cooling pipeline assembly is arranged in the second accommodating space and is connected with the liquid cooling plate. The utility model solves the problem of unreasonable arrangement of the internal space of the battery pack in the prior art.

Description

Technical Field

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

[0002] In recent years, new energy technologies have developed rapidly. New energy technologies, especially new energy batteries, have been applied to more and more scenarios and industries. New energy batteries will generate heat when in use. Preventing the local heat of the battery from being too high is crucial to the safety of the use of new energy batteries. New energy batteries will be equipped with a liquid cooling system. The common forms are mainly battery-module-PACK type battery packs, equipped with bottom liquid cooling systems or side liquid cooling systems; battery-PACK type battery packs, equipped with bottom liquid cooling systems, etc. The liquid cooling plate is set at the bottom of the box to achieve bottom liquid cooling. When transferring heat, the path is too long, the temperature difference of the entire battery pack is large, and more components and a large number of pipes and joints are required. The series and parallel connection of multiple pipes takes up a lot of space in the battery pack. The side liquid cooling plate is usually used in battery-module-PACK type battery packs. Components such as end plates are still required to ensure the preload between batteries. After the battery module is formed, it is installed in the battery box to form a battery pack. The combination of side liquid cooling and CTP cannot be achieved, and multiple parts still occupy the space of the battery pack. In addition, in the above three methods, when the battery pack is subjected to a slight collision, the flow channel of the liquid cooling plate is prone to deformation, and even affects the normal operation of the liquid cooling system.

[0003] It can be seen from the above that the prior art has the problem of unreasonable internal space layout of the battery pack. Utility Model Content

[0004] The main purpose of the utility model is to provide a battery box and a battery pack to solve the problem of unreasonable internal space layout of the battery pack in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery pack is provided, including: a box frame; a reinforcing plate, the reinforcing plate is upright in the box frame along a first direction, and divides the box frame into a first accommodating space and a second accommodating space, the first accommodating space is used to accommodate a battery pack; a liquid cooling plate, at least a portion of the liquid cooling plate is upright in the first accommodating space along a second direction, and the second direction is perpendicular to the first direction; a liquid cooling pipeline assembly, the liquid cooling pipeline assembly is arranged in the second accommodating space and connected to the liquid cooling plate.

[0006] Furthermore, a slot is provided on the top of the reinforcing plate, and a connecting section is provided at the first end of the liquid cooling plate. The connecting section is arranged in the slot and extends into the second accommodating space to communicate with the liquid cooling pipeline assembly.

[0007] Furthermore, there are multiple liquid cooling plates, which are spaced apart along the first direction, and the multiple liquid cooling plates divide the first accommodating space into multiple sub-spaces, and the multiple sub-spaces are used to place the battery packs.

[0008] Furthermore, the connecting section is provided with a liquid inlet and a liquid outlet, the liquid cooling pipeline assembly includes a liquid inlet pipeline and a liquid outlet pipeline, the liquid inlets of multiple liquid cooling plates are respectively connected to the liquid inlet pipeline, there are multiple liquid cooling plates, and the liquid outlets of the multiple liquid cooling plates are respectively connected to the liquid outlet pipeline; the liquid cooling pipeline assembly also includes a liquid inlet joint and a liquid outlet joint, the liquid inlet joint is arranged on the liquid inlet pipeline, and the liquid outlet joint is arranged on the liquid outlet pipeline, for connecting to an external cooling pipeline.

[0009] Furthermore, the liquid inlet pipeline of the liquid cooling pipeline assembly is provided with multiple first joints at intervals along the first direction, and the liquid outlet pipeline of the liquid cooling pipeline assembly is provided with multiple second joints at intervals along the first direction, the first joint is used to connect with the liquid inlet of the liquid cooling plate, and the second joint is connected with the liquid outlet of the liquid cooling plate.

[0010] Furthermore, the liquid inlet pipeline includes at least one liquid inlet section, and the liquid outlet pipeline includes at least one liquid outlet section; the liquid inlets of two adjacent liquid cooling plates are connected through the liquid inlet section, and the liquid outlets of two adjacent liquid cooling plates are connected through the liquid outlet section, and the liquid inlet joint is located on one liquid inlet section, and the liquid outlet joint is located on one liquid outlet section.

[0011] Furthermore, the box frame is provided with a second end plate and a first end plate near the second end of the liquid cooling plate, the first end plate is provided with a limiting groove on one side near the first accommodating space, and the second end of the liquid cooling plate extends into the limiting groove.

[0012] Furthermore, the battery pack further includes a first buffer component, the box frame further includes a side plate, and the first buffer component is arranged between a liquid cooling plate adjacent to the side plate among the plurality of liquid cooling plates and the side plate.

[0013] Furthermore, a plurality of bayonet holes are provided on the top of the liquid cooling plate, and the plurality of bayonet holes are arranged at intervals along the length direction of the liquid cooling plate, and are used for injecting glue between the liquid cooling plate and the side surface of the battery pack.

[0014] According to another aspect of the utility model, a battery pack is provided, including a battery group and the above-mentioned battery box, wherein the battery group is accommodated in the first accommodation space.

[0015] Furthermore, the battery pack includes a plurality of battery cells, the plurality of battery cells are arranged in sequence along the second direction, and a heat insulating member is arranged between at least one group of two adjacent battery cells.

[0016] Furthermore, the battery pack further includes a second buffer member, which is arranged at two ends of the battery pack along the second direction.

[0017] The technical solution of the utility model is applied, and the battery box includes a box frame, a reinforcement plate, a liquid cooling plate and a liquid cooling pipeline assembly. The reinforcement plate is vertically arranged in the box frame along a first direction, and the box frame is divided into a first accommodating space and a second accommodating space. The first accommodating space is used to accommodate the battery pack. At least a part of the liquid cooling plate is vertically arranged in the first accommodating space along a second direction, and the second direction is perpendicular to the first direction. The liquid cooling pipeline assembly is arranged in the second accommodating space and connected to the liquid cooling plate. By using the reinforcement plate to divide the box frame into the first accommodating space and the second accommodating space, the liquid cooling plate and the battery pack, as well as the liquid cooling pipeline assembly are connected to the liquid cooling plate. The pipeline assemblies are respectively located in the first accommodating space and the second accommodating space. The reinforcing plate can provide support and positioning for the liquid cooling plate, thereby eliminating the need for other connecting and fixing components, improving volume utilization, and realizing integrated side liquid cooling in the limited internal space of the battery pack to cool and dissipate heat for the battery pack. At the same time, the liquid cooling pipeline assembly is accommodated in the second accommodating space adjacent to the liquid cooling plate and connected to one end of the liquid cooling plate, shortening the heat exchange path, further effectively utilizing the limited space of the battery box, and making the internal space of the battery pack reasonably arranged, solving the problem of unreasonable internal space arrangement of the battery pack in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 An exploded view of a battery pack in a specific embodiment of the utility model is shown;

[0020] Figure 2 A schematic diagram showing the structure of a battery box in a specific embodiment of the utility model is shown;

[0021] Figure 3 A schematic diagram showing the structure of a box frame in a specific embodiment of the utility model is shown;

[0022] Figure 4 A schematic diagram showing the structure of a reinforcement plate in a specific embodiment of the utility model is shown;

[0023] Figure 5 A schematic structural diagram of a first end plate in a specific embodiment of the utility model is shown;

[0024] Figure 6 A schematic diagram of the assembly structure of a liquid cooling plate and a liquid cooling pipeline assembly in a specific embodiment of the utility model is shown;

[0025] Figure 7 A partial exploded view of a liquid cooling plate connection section in a specific embodiment of the utility model is shown;

[0026] Figure 8 A schematic structural diagram of a liquid cooling pipeline assembly in a specific embodiment of the utility model is shown;

[0027] Fig. 9 A structural schematic diagram showing an angle of a liquid cooling pipeline assembly in another specific embodiment of the utility model;

[0028] Fig.10 A structural schematic diagram of a liquid cooling pipeline assembly in another specific embodiment of the utility model from another angle is shown;

[0029] Fig.11 A schematic structural diagram of a battery pack in a specific embodiment of the utility model is shown.

[0030] The above drawings include the following reference numerals:

[0031] 10. Box frame; 11. Second end plate; 12. First end plate; 121. Limiting groove; 13. Side plate; 20. Reinforcing plate; 21. Card slot; 30. Battery pack; 31. Battery cell; 40. Liquid cooling plate; 41. Connecting section; 411. Liquid inlet; 412. Liquid outlet; 42. Main body section; 43. Card slot; 50. Liquid cooling pipeline assembly; 51. First liquid inlet pipeline; 52. First liquid outlet pipeline; 53. Liquid inlet connector; 54. Liquid outlet connector; 55. First connector; 56. Second liquid inlet pipeline; 57. Second liquid outlet pipeline; 58. Third connector; 59. Second connector; 60. Second buffer; 70. Heat insulation; 80. Top cover; 90. Mounting hole. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0034] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0035] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0036] In order to solve the problem of low internal space utilization of battery packs in the prior art, the utility model provides a battery box and a battery pack. The battery pack includes the battery box.

[0037] like Figures 1 to 4 as well as Fig.10 As shown, the battery box includes a box frame 10, a reinforcement plate 20, a liquid cooling plate 40 and a liquid cooling pipeline assembly 50. The reinforcement plate 20 is vertically arranged in the box frame 10 along a first direction, and divides the box frame 10 into a first accommodation space and a second accommodation space, and the first accommodation space is used to accommodate the battery pack 30. At least a portion of the liquid cooling plate 40 is vertically arranged in the first accommodation space along a second direction, and the second direction is perpendicular to the first direction. The liquid cooling pipeline assembly 50 is arranged in the second accommodation space and connected to the liquid cooling plate 40.

[0038] It should be noted that, in this embodiment, the first direction is Figure 1 The X direction in the second direction is Figure 1 The Y direction in the third direction is Figure 1 The Z direction in .

[0039] The box frame 10 is divided into a first accommodating space and a second accommodating space by utilizing the reinforcing plate 20. The liquid cooling plate 40 and the liquid cooling pipe assembly 50 are respectively located in the first accommodating space and the second accommodating space. The first accommodating space is used to accommodate the battery pack 30. The reinforcing plate 20 can provide support and positioning for the liquid cooling plate 40, thereby eliminating the need for other connecting and fixing components, thereby improving volume utilization and integrating side liquid cooling in the limited internal space of the battery pack to cool and dissipate heat for the battery pack 30. At the same time, the liquid cooling pipe assembly 50 is accommodated in the second accommodating space adjacent to the liquid cooling plate 40 and connected to one end of the liquid cooling plate 40, thereby shortening the heat exchange path, further effectively utilizing the limited space of the battery pack, and rationally arranging the internal space of the battery pack.

[0040] In this embodiment, there are multiple liquid cooling plates 40, and the multiple liquid cooling plates 40 are arranged at intervals along the first direction. The multiple liquid cooling plates 40 divide the first accommodating space into multiple subspaces, and each subspace is used to place the battery pack 30 of the battery pack. Each liquid cooling plate 40 is located between two adjacent battery packs 30 or between the battery pack 30 and the box frame 10. The multiple in the embodiment of the present application is two or more. The embodiment of the present application does not specifically limit the number and size of the liquid cooling plates in the battery box. The specific setting can be made with reference to the number and size of the battery packs in the battery pack.

[0041] Specifically, a liquid cooling plate 40 is provided between two adjacent battery packs 30, and the sides of the two adjacent battery packs 30 are cooled simultaneously by the liquid cooling plate 40, thereby improving the liquid cooling efficiency of the liquid cooling plate 40. A liquid cooling plate 40 is also provided between the box frame 10 and the side of the battery pack 30 located at the outermost side, and the liquid cooling plate 40 is fitted with the side of the battery pack 30, so that the two side surfaces of each battery pack 30 in the box frame 10 are fitted with the liquid cooling plate 40, thereby ensuring the cooling effect of the battery pack 30.

[0042] like Figure 3 to Figure 4 As shown, the reinforcing plate 20 is provided with a slot 21 , and the first end of the liquid cooling plate 40 has a connecting section 41 , which is locked in the slot 21 and extends into the second accommodating space to communicate with the liquid cooling pipeline assembly 50 .

[0043] like Figures 6 to 10 As shown, the liquid cooling plate 40 includes a connecting section 41 and a main body section 42. The connecting section 41 is provided with a liquid inlet 411 and a liquid outlet 412 of the liquid cooling channel. The main body section 42 is provided with one or more liquid cooling channels, which are respectively connected with the liquid inlet 411 and the liquid outlet 412. After the coolant flows into the liquid cooling channel through the liquid inlet 411, it flows out through the liquid outlet 412. The main body section 42 of the liquid cooling plate is fitted with the side of the battery pack 30 to take away the heat of the battery pack 30. The size of the connecting section 41 of the liquid cooling plate 40 in the third direction is smaller than the size of the main body section 42 in the third direction, so as to cooperate with the slot 21 of the reinforcing plate 20. In one possible embodiment, the card slot 21 of the reinforcing plate 20 is disposed at the top of one end of the reinforcing plate 20 away from the bottom plate of the box frame 10, and the opening position of the card slot 21 corresponds to the position of the connecting section 41, so that the connecting section 41 is just stuck in the card slot 21, and the reinforcing plate 20 supports the liquid cooling plate 40. In other possible embodiments, the card slot 21 can also be a hole structure, and the connecting section 41 extends into the hole structure and enters the second accommodating space, which is not limited in the embodiment of the present application. In the embodiment of the present application, the battery pack 30 is directly disposed between the reinforcing plate 20, the liquid cooling plate 40 and the box frame 10, eliminating the side plate structure on both sides of the battery pack and the end plate structure at both ends of the battery pack in the prior art, while ensuring the liquid cooling effect of the battery pack, it also saves the cost and space of the battery pack. Furthermore, by locking the connecting section 41 in the slot 21 and extending it into the second accommodation space to communicate with the liquid cooling pipe assembly 50, isolation of the battery pack 30 and the liquid cooling pipe assembly 50 is achieved, thereby preventing leakage at the connection between the liquid cooling pipe assembly 50 and the liquid inlet and outlet of the connecting section 41, which would adversely affect the battery pack 30 in the first accommodation space.

[0044] like Figures 6 to 10As shown, the liquid cooling pipeline assembly 50 includes a liquid inlet pipeline and a liquid outlet pipeline. The liquid inlets 411 of the multiple liquid cooling plates 40 are respectively connected to the liquid inlet pipeline, and the liquid outlets 412 of the multiple liquid cooling plates 40 are respectively connected to the liquid outlet pipeline. The liquid cooling pipeline assembly 50 also includes a liquid inlet joint 53 and a liquid outlet joint 54. The liquid inlet joint 53 is arranged on the liquid inlet pipeline, and the liquid outlet joint 54 is arranged on the liquid outlet pipeline for connecting to an external cooling pipeline.

[0045] The embodiment of the present application does not limit the specific connection method between the liquid inlet pipeline and the liquid outlet pipeline and the liquid inlet port 411 and the liquid outlet port 412 of the liquid cooling plate 40. In a possible implementation manner, Figures 6 to 8 As shown, the liquid inlet pipeline and the liquid outlet pipeline can be connected by multiple pipe sections, the liquid inlet pipeline includes at least one liquid inlet section, and the liquid outlet pipeline includes at least one liquid outlet section. The liquid inlets 411 of two adjacent liquid cooling plates 40 are connected through the liquid inlet section, and the liquid outlets 412 of two adjacent liquid cooling plates 40 are connected through the liquid outlet section, and the liquid inlet joint 53 is located on one liquid inlet section, and the liquid outlet joint 54 is located on one liquid outlet section.

[0046] For example, the liquid inlet pipeline is as follows Figures 6 to 8 As shown, the liquid cooling pipeline assembly 50 includes a first liquid inlet pipeline 51 and a first liquid outlet pipeline 52. The liquid inlets 411 of the plurality of liquid cooling plates 40 are respectively connected to the first liquid inlet pipeline 51, and the liquid outlets 412 of the plurality of liquid cooling plates 40 are respectively connected to the first liquid outlet pipeline 52. The liquid inlet connector 53 is arranged on the first liquid inlet pipeline 51, and the liquid outlet connector 54 is arranged on the first liquid outlet pipeline 52.

[0047] Specifically, the liquid inlet 411 and the liquid outlet 412 are arranged at intervals up and down, the first liquid inlet pipeline 51 and the liquid inlet 411 connecting two adjacent liquid cooling plates 40, the first liquid outlet pipeline 52 connecting the liquid outlet 412 of two adjacent liquid cooling plates 40, further, the connecting section 41 of the liquid cooling plate 40 located between the adjacent battery packs 30 is provided with two liquid inlets 411 and two liquid outlets 412 that penetrate along the first direction, taking the connection of the liquid inlet 411 as an example, the liquid inlet 411 is connected to the liquid inlet of the adjacent liquid cooling plate opposite to it through the first liquid inlet pipeline 51, and the connection method of the liquid outlet 412 is similar to that of the liquid inlet 411, so as to realize the liquid path connection of the two adjacent liquid cooling plates 40. It is sufficient to set only one liquid inlet 411 and one liquid outlet 412 on the connecting section 41 of the liquid cooling plate 40 between the battery pack 30 and the box frame 10 on the side away from the box frame 10.

[0048] In this embodiment, the liquid inlet pipeline includes at least one liquid inlet section, and the liquid outlet pipeline includes at least one liquid outlet section. The liquid inlets 411 of two adjacent liquid cooling plates 40 are connected through the liquid inlet section, and the liquid outlets 412 of two adjacent liquid cooling plates 40 are connected through the liquid outlet section, and the liquid inlet joint 53 is located on one of the liquid inlet sections, and the liquid outlet joint 54 is located on one of the liquid outlet sections.

[0049] like Figures 6 to 8 As shown, third joints 58 are respectively provided at both ends of each liquid inlet section and liquid outlet section of the liquid cooling pipeline assembly 50, and the liquid inlet 411 and liquid outlet 412 of the liquid cooling plate 40 are correspondingly provided with docking joints, and the third joint 58 is detachably connected to the docking joint.

[0050] Specifically, the butt joints of the liquid inlet 411 and the liquid outlet 412 of the liquid cooling plate 40 are provided with external threads, the third joint 58 is provided with internal threads, and the third joint 58 and the butt joint are threadedly connected. Optionally, the third joint 58 and the butt joint can be two sub-components of a quick-connect joint.

[0051] In the present embodiment, the first liquid inlet pipeline 51 and the first liquid outlet pipeline 52 are corrugated hoses, and the various butt joints are connected by the third joint 58 on the hose, which is convenient for processing and installation. Furthermore, the first liquid inlet pipeline 51 and the first liquid outlet pipeline 52 are also coated with foam, that is, each liquid inlet section and liquid outlet section is coated with foam, and the foam can ensure that the temperature of the first liquid inlet pipeline 51 and the first liquid outlet pipeline 52 is balanced in a cold environment, and to a certain extent, reduce the possibility of the hose being frozen and cracked. Furthermore, the third joint 58 can also be coated with foam to improve the overall thermal insulation effect of the first liquid inlet pipeline 51 and the first liquid outlet pipeline 52. In the present embodiment, the opening direction of the liquid inlet 411 and the liquid outlet 412 of the liquid cooling plate 40 is along the first direction, so as to facilitate connection with the first liquid inlet pipeline 51 or the first liquid outlet pipeline 52.

[0052] Specifically, the liquid inlet joint 53 and the liquid outlet joint 54 are respectively connected to the external cooling pipeline, the first liquid inlet pipeline 51 is located above the first liquid outlet pipeline 52, and correspondingly, the liquid inlet port 411 is located above the liquid outlet port 412. The length of the liquid inlet section where the liquid inlet joint 53 is located and the liquid outlet section where the liquid outlet joint 54 is located are greater than the length of other sections so as to be closer to the side wall of the box frame 10. In actual use, the coolant in the external cooling pipeline enters the first liquid inlet pipeline 51 through the liquid inlet joint 53, and then enters the liquid cooling plate 40 through the liquid inlet port 411, flows through the entire liquid cooling plate 40 along multiple liquid cooling channels spaced vertically and horizontally arranged in the liquid cooling plate 40, and flows into the first liquid outlet pipeline 52 from the liquid outlet port 412, and finally flows out from the liquid outlet joint 54, completing the liquid cooling of the battery pack 30.

[0053] In another possible implementation, the liquid inlet and outlet pipes of the liquid cooling pipe assembly 50 may be integrated, and a first joint 55 connected to the liquid inlet 411 of the liquid cooling plate 40 and a second joint 59 connected to the liquid outlet of the liquid cooling plate 40 are provided thereon. Fig. 9As shown, the liquid cooling pipeline assembly 50 includes a second liquid inlet pipeline 56 and a second liquid outlet pipeline 57. The second liquid inlet pipeline 56 is connected to the liquid inlets 411 of the plurality of liquid cooling plates 40, and the second liquid outlet pipeline 57 is connected to the liquid outlets 412 of the plurality of liquid cooling plates 40, so that the plurality of liquid cooling plates 40 are arranged in parallel with each other; the liquid inlet joint 53 is arranged on the second liquid inlet pipeline 56, and the liquid outlet joint 54 is arranged on the second liquid outlet pipeline 57. The second liquid inlet pipeline 56 and the second liquid outlet pipeline 57 are used to be connected to an external cooling pipeline.

[0054] Specifically, the second liquid inlet pipeline 56 and the second liquid outlet pipeline 57 are both aluminum tubes, which extend along the first direction and are arranged at intervals up and down. The liquid inlet joint 53 and the liquid outlet joint 54 are respectively connected to the second liquid inlet pipeline 56 and the second liquid outlet pipeline 57 through a collecting box. Optionally, foam is also arranged on the second liquid inlet pipeline 56 and the second liquid outlet pipeline 57.

[0055] Further, such as Fig. 9 As shown, the second liquid inlet pipeline 56 is provided with a plurality of first joints 55 at intervals along the first direction, and the second liquid outlet pipeline 57 is provided with a plurality of second joints 59 at intervals along the first direction. The first joint 55 is used to communicate with the liquid inlet 411 of the liquid cooling plate 40, and the second joint 59 is connected with the liquid outlet 412 of the liquid cooling plate 40.

[0056] Specifically, the first joints 55 and the second joints 59 are arranged in pairs on the second liquid inlet pipeline 56 and the second liquid outlet pipeline 57, respectively, near the side of the liquid cooling plate 40 and correspondingly connected to the liquid inlet 411 and the liquid outlet 412 of the liquid cooling plate 40. Optionally, the liquid inlet 411 and the liquid outlet 412 are provided with connecting pipes, which extend into the first joint 55 and the second joint 59 to complete the connection between the liquid cooling pipeline assembly 50 and the liquid cooling plate 40. Furthermore, the opening direction of the liquid inlet 411 and the liquid outlet 412 of the liquid cooling plate 40 is along the second direction, so as to facilitate the connection with the second liquid inlet pipeline 56 or the second liquid outlet pipeline 57.

[0057] like Figures 2 to 5 As shown, the box frame 10 includes a first end plate 12 and a second end plate 11. The second end plate 11 and the first end plate 12 extend in the first direction respectively and are arranged opposite to each other in the second direction, and the first end plate 12 is located near the second end of the liquid cooling plate 40. The first end plate 12 is provided with a limiting groove 121 on one side near the first accommodating space, and there are a plurality of limiting grooves 121, and the plurality of limiting grooves 121 are respectively arranged in one-to-one correspondence with the plurality of liquid cooling plates 40, and the second end of the liquid cooling plate 40 extends into the limiting groove 121.

[0058] In this embodiment, the width of the limiting groove 121 is adapted to the thickness of the liquid cooling plate 40, and is used to limit the liquid cooling plate 40. At the same time, the liquid cooling plate 40 is arranged in the box frame 10 and together with the reinforcing plate 20, the structural strength of the box frame 10 is strengthened. Optionally, the bottom of the box frame 10 is also provided with a limiting groove 121 to improve the limiting effect of the liquid cooling plate 40. Furthermore, the second end plate 11 and the first end plate 12 are also provided with flanges, which are arranged corresponding to the flanges of the top cover 80 of the battery pack, and the top cover 80 and the box frame 10 are connected by screws.

[0059] Specifically, the card slot 21 and the limiting slot 121 are located in the same plane along the second direction, and the liquid cooling plate 40 is in the shape of a kitchen knife as a whole. The connecting section 41 of the liquid cooling plate 40 is clamped on the card slot 21. The card slot 21 and the limiting slot 121 are used to limit the reinforcing plate 20, and the positioning and installation of the reinforcing plate 20 are also facilitated. Through the above arrangement, the structural strength of the box frame 10 is ensured, and at the same time, it can be ensured that the liquid cooling plate 40 will not be offset when other components are installed in the later stage. A plurality of mounting holes 90 are also provided on the side of the reinforcing plate 20 facing the second accommodating space, and a plurality of electrical components are accommodated and installed on the reinforcing plate 20 through the mounting holes 90, further utilizing the space of the box frame 10.

[0060] like Fig.10 As shown, the battery box also includes a first buffer. The box frame 10 also includes a side panel 13, and there are two side panels 13. The two side panels 13 are arranged opposite to each other and surround the side wall of the box frame 10 with the second end panel 11 and the first end panel 12. In this embodiment, the two side surfaces of the battery pack 30 extending along the first direction are respectively attached to the liquid cooling plate 40, and the two end surfaces extending along the second direction are respectively attached to the reinforcing plate 20 and the first end panel 12, so as to maximize the space utilization. The first buffer is arranged between the liquid cooling plate 40 adjacent to the side panel 13 among the multiple liquid cooling plates 40 and the side panel 13.

[0061] In this embodiment, the bottom end of the reinforcing plate 20 is welded to the bottom plate of the box frame 10, and the two ends are respectively welded to the two side plates 13, so as to ensure the strength of the box frame 10 and prevent the side plates 13 of the box frame 10 from deforming inward under special circumstances; it is also used to provide a certain pre-tightening force to the battery pack 30 to prevent the battery cells 31 of the battery pack 30 from slipping.

[0062] Specifically, a groove is provided on the side panel 13, and the first buffer member is accommodated in the groove. In the present embodiment, the first buffer member is foam. The first buffer member is provided to prevent the flow channel of the liquid cooling plate 40 from colliding with the side panel 13 and causing deformation of the flow channel when the battery pack is subjected to a slight collision, thereby affecting the liquid cooling effect of the liquid cooling plate 40. At the same time, the temperature uniformity of the entire battery pack is improved, so that each battery group 30 maintains a temperature balance.

[0063] like Figure 2 and Figure 6 As shown, a plurality of bayonet holes 43 are provided on the top of the liquid cooling plate 40, and the bayonet holes 43 are arranged at intervals along the length direction of the liquid cooling plate 40, and are used to inject glue between the liquid cooling plate 40 and the side of the battery pack 30. At the same time, since the bayonet holes 43 are recessed in the direction close to the flow channel, so that the flow area formed by the flow channel is reduced, the bayonet holes are arranged so that when the coolant flows in the flow channel, it can pass through the flow channel at a more uniform flow rate, thereby achieving a better heat exchange effect.

[0064] Specifically, there are multiple bayonet holes 43, and multiple bayonet holes 43 are arranged on the top of the liquid cooling plate 40. By filling with thermal conductive potting glue, the heat exchange area between the battery and the liquid cooling plate is increased, the cooling effect is improved, the internal temperature uniformity of the battery pack is better, and the temperature difference between the battery cells 31 is smaller.

[0065] like Figure 1 As shown, the present application also provides a battery pack, including a battery pack 30 and the above-mentioned battery box, wherein the battery pack 30 is accommodated in a first accommodation space. Accommodating the battery pack 30 in the first accommodation space ensures the fastening of the battery pack 30 and reduces the number of components in the battery pack.

[0066] like Fig.11 As shown, the battery pack 30 includes a plurality of battery cells 31 , and the plurality of battery cells 31 are sequentially arranged along the second direction, and a heat insulating member 70 is arranged between at least one group of two adjacent battery cells 31 .

[0067] In a specific embodiment, the battery pack 30 includes 12 battery cells 31, and the heat insulation member 70 is arranged in a spacing manner of "1, 3, 3, 3, 2", such as Fig.11 shown.

[0068] In this embodiment, if Fig.11 As shown, the battery pack further includes a second buffer member 60. The second buffer member 60 is disposed at both ends of the battery pack 30 along the second direction.

[0069] Specifically, the second buffer member 60 is a sheet plate, which has high mechanical properties, thermal stability, chemical stability and good electrical insulation. When the battery pack has extreme internal expansion, it absorbs the expansion tolerance of the battery cell 31, reduces the possibility of damage to the reinforcing plate 20, and improves the life of the battery pack.

[0070] From the above description, it can be seen that the above-mentioned embodiment of the utility model achieves the following technical effects: by utilizing the reinforcing plate 20 to divide the box frame 10 into a first accommodating space and a second accommodating space, the liquid cooling plate 40 and the liquid cooling pipe assembly 50 are respectively located in the first accommodating space and the second accommodating space, the first accommodating space is used to accommodate the battery pack 30, and the reinforcing plate 20 can provide support and positioning for the liquid cooling plate 40, so that no other connecting and fixing components are required, thereby improving the volume utilization rate, and realizing the integration of side liquid cooling in the limited internal space of the battery pack to cool and dissipate the heat of the battery pack 30. At the same time, the liquid cooling pipe assembly 50 is accommodated in the second accommodating space adjacent to the liquid cooling plate 40 and connected to one end of the liquid cooling plate 40, thereby shortening the heat exchange path, further effectively utilizing the limited space of the battery pack, and making the internal space of the battery pack reasonably arranged.

[0071] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0072] It should be noted that the terms "first", "second", 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 the numbers used in this way 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.

[0073] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery box, characterized in that: include: Box frame (10); a reinforcing plate (20), the reinforcing plate (20) being vertically arranged in the box frame (10) along a first direction and dividing the box frame (10) into a first accommodating space and a second accommodating space, the first accommodating space being used to accommodate a battery pack (30); a liquid cooling plate (40), at least a portion of which is vertically disposed in the first accommodating space along a second direction, the second direction being perpendicular to the first direction; A liquid cooling pipeline assembly (50), wherein the liquid cooling pipeline assembly (50) is arranged in the second accommodating space and connected to the liquid cooling plate (40).

2. The battery box according to claim 1, characterized in that: The reinforcing plate (20) is provided with a slot (21), and the first end of the liquid cooling plate (40) has a connecting section (41), and the connecting section (41) is locked in the slot (21) and extends into the second accommodating space to communicate with the liquid cooling pipeline assembly (50).

3. The battery box according to claim 1, characterized in that: There are a plurality of liquid cooling plates (40), and the plurality of liquid cooling plates (40) are arranged at intervals along the first direction. The plurality of liquid cooling plates (40) divide the first accommodating space into a plurality of sub-spaces, and the plurality of sub-spaces are used to place the battery pack (30).

4. The battery box according to claim 2, characterized in that: The connecting section (41) is provided with a liquid inlet (411) and a liquid outlet (412); the liquid cooling pipeline assembly (50) comprises a liquid inlet pipeline and a liquid outlet pipeline; there are a plurality of liquid cooling plates (40); the liquid inlets (411) of the plurality of liquid cooling plates (40) are respectively connected to the liquid inlet pipeline; and the liquid outlets (412) of the plurality of liquid cooling plates (40) are respectively connected to the liquid outlet pipeline; The liquid cooling pipeline assembly (50) further comprises a liquid inlet joint (53) and a liquid outlet joint (54), wherein the liquid inlet joint (53) is arranged on the liquid inlet pipeline, and the liquid outlet joint (54) is arranged on the liquid outlet pipeline for connection with an external cooling pipeline.

5. The battery box according to claim 4, characterized in that: The liquid inlet pipeline of the liquid cooling pipeline assembly (50) is provided with a plurality of first joints (55) at intervals along the first direction, and the liquid outlet pipeline of the liquid cooling pipeline assembly (50) is provided with a plurality of second joints (59) at intervals along the first direction, the first joints (55) being used to communicate with the liquid inlet (411) of the liquid cooling plate (40), and the second joints (59) being used to communicate with the liquid outlet (412) of the liquid cooling plate (40).

6. The battery box according to claim 4, characterized in that: The liquid inlet pipeline includes at least one liquid inlet section, and the liquid outlet pipeline includes at least one liquid outlet section; the liquid inlets (411) of two adjacent liquid cooling plates (40) are connected through the liquid inlet section, and the liquid outlets (412) of two adjacent liquid cooling plates (40) are connected through the liquid outlet section, and the liquid inlet joint (53) is located on one of the liquid inlet sections, and the liquid outlet joint (54) is located on one of the liquid outlet sections.

7. The battery box according to claim 2, characterized in that: The box frame (10) is provided with a first end plate (12) at a position close to the second end of the liquid cooling plate (40); the first end plate (12) is provided with a limiting groove (121) on a side close to the first accommodating space; the second end of the liquid cooling plate (40) extends into the limiting groove (121).

8. The battery box according to claim 3, characterized in that: The battery box further comprises a first buffer member, and the box frame (10) further comprises a side plate (13), wherein the first buffer member is arranged between the liquid cooling plate (40) adjacent to the side plate (13) among the plurality of liquid cooling plates (40) and the side plate (13).

9. The battery box according to any one of claims 1 to 8, characterized in that: A bayonet (43) is provided on the top of the liquid cooling plate (40), and the bayonet (43) is multiple and arranged at intervals along the length direction of the liquid cooling plate (40) for injecting glue between the liquid cooling plate (40) and the side surface of the battery pack (30).

10. A battery pack, characterized in that: The invention comprises a battery pack (30) and a battery box according to any one of claims 1 to 9, wherein the battery pack (30) is accommodated in the first accommodation space.

11. The battery pack according to claim 10, characterized in that: The battery pack (30) comprises a plurality of battery cells (31), the plurality of battery cells (31) being arranged in sequence along the second direction, and a heat insulating member (70) being arranged between at least one group of two adjacent battery cells (31).

12. The battery pack according to claim 10, characterized in that: The battery pack further comprises a second buffer member (60), wherein the second buffer member (60) is arranged at two ends of the battery group (30) along the second direction.

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