Battery box and battery pack

Abstract

The utility model provides a battery box and a battery pack, the battery box comprises a base plate and two side plates, the base plate comprises an upper plate body and a lower plate body which are arranged at an interval along the height direction, a first runner is arranged between the upper plate body and the lower plate body, the side plates comprise a first plate body and a second plate body which are arranged at an interval along the width direction of the base plate, and the first runner is arranged between the first plate body and the second plate body. A first flow channel is arranged between the upper plate body and the lower plate body, a second flow channel is arranged between the first plate body and the second plate body, the two side plates are arranged at the two ends of the bottom plate respectively, the two ends of the upper plate body are connected with the first plate bodies of the two side plates respectively, the two ends of the lower plate body are connected with the second plate bodies of the two side plates respectively, and the two ends of the first flow channel are communicated with the second flow channel respectively. According to the battery box disclosed by the invention, the first flow channels and the second flow channels on the bottom plate and the side plates are communicated to form the liquid cooling flow channels, and the liquid cooling flow channels are integrated and welded with the bottom plate and the side plates of the battery box, so that the internal space occupation of the battery box is reduced; and the problem of poor space utilization rate of the battery pack in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery, specifically, relate to a battery box and battery package. BACKGROUND

[0002] In the field of battery technology, especially for the design and integration of high energy density battery package, space utilization and thermal management are two key technical indicators. The performance of the battery package depends largely on the layout of its internal components and the efficiency of the cooling system, which directly affects the overall energy density of the battery package and the safety and life under high intensity use.

[0003] At present, the cooling system of the battery package mostly adopts the bottom liquid cooling mode, that is, a cooling plate is designed at the bottom of the battery package, and the heat generated by the battery cell is taken away by the circulation of the cooling liquid. However, this traditional cooling plate structure is often complex in design, and usually requires additional components such as a bottom guard plate to protect against collision between the cooling plate and the bottom guard plate due to deformation during use. During the installation process of the box body, the bottom guard plate is bolted to the box body frame after the cooling plate is bolted to the box body frame. Due to the bolted connection of the cooling plate and the box body, there is a certain gap between the bottom guard plate and the cooling plate, which will occupy the valuable space inside the battery package and affect the space utilization of the battery box.

[0004] As can be seen from the above, the current battery package has the problem of poor space utilization. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a battery box and a battery package to solve the problem of poor space utilization of the battery package in the prior art.

[0006] In order to achieve the above purpose, according to one aspect of the utility model, a battery box is provided, which comprises a bottom plate and two side plates. The bottom plate comprises an upper plate body and a lower plate body arranged at intervals along the height direction. A first flow channel extending along the width direction of the bottom plate is arranged between the upper plate body and the lower plate body. The side plate comprises a first plate body and a second plate body arranged at intervals along the width direction of the bottom plate. A second flow channel extending along the length direction of the bottom plate is arranged between the first plate body and the second plate body. The two side plates are respectively arranged at the two ends of the bottom plate along the width direction, and the two ends of the upper plate body are respectively welded to the first plate body of the two side plates. The two ends of the lower plate body are respectively welded to the second plate body of the two side plates. The two ends of the first flow channel are respectively communicated with the second flow channel of the two side plates.

[0007] Further, the two ends of the upper plate body are respectively brazed to the first plate body of the two side plates, and the two ends of the lower plate body are respectively brazed to the second plate body of the two side plates.

[0008] Further, the battery box further comprises a frame beam and a reinforcing plate, the frame beam is arranged at two ends of the bottom plate along the length direction of the bottom plate, the bottom plate, the side plate and the frame beam form a groove structure for accommodating the battery cell, the side of the frame beam away from the groove structure and the side of the side plate away from the groove structure are respectively provided with a fixing structure, the reinforcing plate is arranged on the side of the bottom plate away from the groove structure, the reinforcing plate comprises a fastener, and the reinforcing plate is fixedly connected with the frame beam and the side plate through the fastener cooperating with the fixing structure.

[0009] Further, the battery box further comprises a bottom heat insulating piece, the bottom heat insulating piece is arranged between the reinforcing plate and the bottom plate, and a sealant is arranged between the peripheral edge of the bottom plate and the reinforcing plate.

[0010] Further, the battery box further comprises a baffle, a horizontal and vertical beam structure and a heat-conducting glue, which are arranged on the surface of the side of the bottom plate facing the battery cell, and are used for fixing and heat-conducting of the battery cell.

[0011] Further, the battery box further comprises a side heat insulating piece, the side heat insulating piece is arranged on the outer side of the side plate.

[0012] Further, the battery box further comprises a first partition plate, the first partition plate is arranged in the first flow channel, the first partition plate extends along the width direction of the bottom plate, the first partition plate divides the first flow channel into a plurality of first sub-flow channels arranged at intervals along the length direction of the bottom plate, and the two ends of the plurality of first sub-flow channels along the width direction of the bottom plate are communicated with the second flow channel.

[0013] Further, the side plate further comprises a second partition plate, the second partition plate is arranged in the second flow channel, the second partition plate divides the second flow channel into a plurality of second sub-flow channels arranged at intervals along the height direction of the side plate, the second partition plate is provided with a via hole communicated with the second sub-flow channel, and the via holes on the adjacent two second partition plates are arranged at the two ends of the second sub-flow channel along the length direction of the side plate.

[0014] Further, the battery box further comprises a water nozzle, the water nozzle is arranged on the side plate, the water nozzle is communicated with the second sub-flow channel at the top end, and the water nozzle is arranged on the side away from the via hole on the second partition plate along the length direction of the bottom plate.

[0015] According to another aspect of the utility model, a battery pack is provided, the battery pack comprises the above-mentioned battery box.

[0016] The utility model discloses a technical scheme, battery box includes bottom plate two side plates, and the bottom plate includes the upper plate body and lower plate body who sets up interval along the height direction, and the first flow channel who sets up along the width direction of bottom plate is arranged between the upper plate body and lower plate body, and the side plate includes the first plate body and second plate body who sets up interval along the width direction of bottom plate, and the second flow channel who extends along the length direction of bottom plate is arranged between the first plate body and second plate body, and two side plates are arranged at the both ends of bottom plate along the width direction respectively, and the both ends of upper plate body are connected with the first plate body of two side plates respectively, and the both ends of lower plate body are connected with the second plate body of two side plates respectively, and the both ends of first flow channel are communicated with the second flow channel of two side plates respectively.

[0017] From the above, the battery box of the application adopts the first flow channel arranged on the bottom plate and the second flow channel arranged on the side plate, the first flow channel and the second flow channel are communicated to form a liquid cooling flow channel for the flow of liquid coolant, and the bottom plate and the side plate are connected by welding. Compared with the bolt connection mode of the bottom plate and the side plate of the prior art, the liquid cooling flow channel is integrated with the bottom plate and the side plate of the battery box, the space occupation inside the battery box is reduced, and the space utilization rate of the battery box is improved.

[0018] The first plate body, the second plate body, the upper plate body and the lower plate body are cooperatively connected to form the structure of the communicated first flow channel and second flow channel, which is beneficial to improve the flow efficiency of the liquid coolant and the heat dissipation efficiency of the battery cell.

[0019] The battery box of the application adopts the first flow channel and the second flow channel arranged in the bottom plate and the side plate to flow the liquid coolant, so as to realize that the bottom plate and the side plate not only have the effect of increasing the mechanical strength of the battery pack and protecting the battery cell, but also have the effect of cooling the battery cell, so as to improve the thermal management efficiency of the battery box and ensure the temperature stability of the battery cell under various working conditions, thereby improving the overall performance and safety of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings accompanying the specification of the application form part hereof, the application illustrative embodiments thereof, and the specification is intended to explain the application and is not intended to be not unduly limited by the application. In the drawings:

[0021] Figure 1 An exploded view of the battery box of the application is shown;

[0022] Figure 2 A perspective structural schematic view of the bottom plate and the side plate of the application is shown;

[0023] Figure 3 A top view of the bottom plate and the side plate of the application is shown;

[0024] Figure 4A-A sectional view of Figure 3

[0025] Figure 5 B-B sectional view of Figure 3

[0026] Figure 6 D enlarged view of Figure 5

[0027] Figure 7 C-C sectional view of Figure 3

[0028] Figure 8 E enlarged view of Figure 7

[0029] Wherein, the above-mentioned drawings include the following reference signs:

[0030] 10, bottom plate; 110, first flow channel; 111, first sub-flow channel; 120, groove structure; 130, upper plate body; 140, lower plate body; 150, first partition plate; 20, side plate; 210, second flow channel; 211, second sub-flow channel; 220, second partition plate; 221, via hole; 230, first plate body; 240, second plate body; 30, water nozzle; 310, water inlet nozzle; 320, water outlet nozzle; 40, frame beam; 50, support beam; 60, reinforcing plate; 710, bottom heat insulation piece; 720, side heat insulation piece; 80, sealing glue; 90, heat-conducting glue; 100, battery cell; 1010, fixing structure. DETAILED DESCRIPTION

[0031] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0032] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0033] In the present application, unless otherwise specified, the orientation words such as "upper, lower, top, bottom" are generally directed to the direction shown in the drawings, or are directed to the vertical, perpendicular or gravity direction of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0034] Embodiment one

[0035] ​​​​​In order to solve the problem of poor space utilization of the battery pack in the prior art, the embodiment provides a battery box.

[0036] As shown in Figures 1 to 8 The battery box comprises a bottom plate 10, two side plates 20 and a water nozzle 30, the bottom plate 10 is provided with a first flow channel 110, the side plates 20 are arranged at both ends of the bottom plate 10 along the width direction, the side plates 20 are provided with a second flow channel 210 in communication with the first flow channel 110, and the water nozzle 30 is arranged on the side plate 20 and is in communication with the second flow channel 210 for liquid supply and discharge.

[0037] The bottom plate 10 comprises an upper plate body 130 and a lower plate body 140 arranged at intervals along the height direction, the first flow channel 110 extending along the width direction of the bottom plate 10 is arranged between the upper plate body 130 and the lower plate body 140, the side plate 20 comprises a first plate body 230 and a second plate body 240 arranged at intervals along the width direction of the bottom plate 10, the second flow channel 210 extending along the length direction of the bottom plate 10 is arranged between the first plate body 230 and the second plate body 240, the two ends of the upper plate body 130 are respectively welded to the first plate bodies 230 of the two side plates 20, the two ends of the lower plate body 140 are respectively welded to the second plate bodies 240 of the two side plates 20, and the two ends of the first flow channel 110 are respectively in communication with the second flow channels 210 of the two side plates 20.

[0038] Specifically, the two ends of the upper plate body 130 are respectively brazed to the first plate bodies 230 of the two side plates 20, and the two ends of the lower plate body 140 are respectively brazed to the second plate bodies 240 of the two side plates 20, and the brazing connection is beneficial to improving the strength of the overall structure.

[0039] It can be understood that the area of the lower plate body 140 is greater than the area of the upper plate body 130, the projection of the upper plate body 130 on the lower plate body 140 is located inside the lower plate body 140, the area of the second plate body 240 is greater than the area of the first plate body 230, the projection of the first plate body 230 on the second plate body 240 is located inside the second plate body 240, the first plate body 230, the second plate body 240, the upper plate body 130 and the lower plate body 140 are connected in cooperation to form the structure of the first flow channel 110 and the second flow channel 210 in communication, which is beneficial to improving the flow efficiency of the liquid coolant and further improving the heat dissipation efficiency of the battery cell 100.

[0040] It should be noted that the bottom plate 10 further comprises a front plate body and a rear plate body arranged at intervals along the length direction, the front plate body, the rear plate body, the upper plate body 130 and the lower plate body 140 cooperatively form the first flow channel 110; and the corresponding side plate 20 further comprises a top plate, a third plate body on the front side and a fourth plate body on the rear side, and the top plate, the first plate body 230, the second plate body 240, the third plate body and the fourth plate body cooperatively form the second flow channel 210.

[0041] Specifically, the battery box of the present application adopts the first flow channel 110 arranged on the bottom plate 10, the second flow channel 210 arranged on the side plate 20, the first flow channel 110 and the second flow channel 210 are communicated to form a liquid cooling flow channel for the flow of liquid coolant, and the bottom plate and the side plate are connected by welding. Compared with the bolt connection mode of the bottom plate and the side plate of the prior art, not only the liquid cooling flow channel is integrated with the bottom plate and the side plate of the battery box, but also the space occupation of the inside of the battery box is reduced, thereby improving the space utilization rate of the battery box.

[0042] In the present embodiment, the battery box of the present application adopts the first flow channel 110 and the second flow channel 210 arranged in communication inside the bottom plate 10 and the side plate 20 for the flow of liquid coolant, so as to realize that the bottom plate 10 and the side plate 20 not only have the effect of increasing the mechanical strength of the battery pack and protecting the battery cell 100, but also improve the thermal management efficiency of the battery box, ensure the temperature stability of the battery cell 100 under various working conditions, and thereby improve the overall performance and safety of the battery pack.

[0043] Among them, the bottom plate 10 and the side plate 20 are fixedly connected to form the frame of the battery box, and the fixed connection mode of the bottom plate 10 and the side plate 20 is welding, so as to improve the connection strength between the bottom plate 10 and the side plate 20.

[0044] In the present embodiment, the second flow channel 210 on one of the side plates 20 is communicated with the second flow channel 210 on the other side plate 20 through the first flow channel 110.

[0045] The two side plates 20 and the one bottom plate 10 cooperate to form three cooling surfaces in contact with the battery cell 100. The battery box of the present application adopts a three-sided cooling structure to realize cooling of the bottom surface and the side surface of the battery cell 100, thereby improving the cooling capacity and being beneficial to improving the cooling effect of the battery cell 100.

[0046] As shown in Figure 1 , the length direction of the battery box, i.e. the length direction of the bottom plate 10 and the side plate 20 is the X direction as shown in Figure 1 ; the width direction of the battery box, i.e. the width direction of the bottom plate 10 and the side plate 20 is the Y direction as shown in Figure 1 ; and the height direction of the battery box, i.e. the height direction of the bottom plate 10 and the side plate 20 is the Z direction as shown in Figure 1 .

[0047] As shown in Figures 1 to 3As shown, the water nozzle 30 includes an inlet water nozzle 310 and an outlet water nozzle 320, one of the side plates 20 is provided with the inlet water nozzle 310, and the other side plate 20 is provided with the outlet water nozzle 320. The water nozzle 30 is arranged in pairs, the inlet water nozzle 310 in the two water nozzles 30 arranged in pairs is used to realize liquid supply, and the outlet water nozzle 320 is used to realize liquid discharge. The two water nozzles 30 are respectively communicated with the two side plates 20, so as to realize that the liquid coolant enters the second flow channel 210 of one of the side plates 20 through the inlet water nozzle 310, then flows to the inside of the second flow channel 210 of the other side plate 20 through the first flow channel 110 of the bottom plate 10, and finally is discharged through the outlet water nozzle 320, so as to realize the flow of the liquid coolant.

[0048] The application realizes the dynamic flow of the liquid coolant between the inlet water nozzle 310, the side plate 20, the bottom plate 10, the side plate 20 and the outlet water nozzle 320 through the water nozzle 30, so as to facilitate the control of the temperature and improve the cooling efficiency. The battery box of the application sets the water nozzle 30 on the side plate 20, has a simple overall structure, and the setting position of the water nozzle 30 is easy to connect with the liquid coolant providing device outside, so as to improve the assembly efficiency.

[0049] In the embodiment, the inlet water nozzle 310 and the outlet water nozzle 320 are arranged on the same side of the side plate 20 along the length direction of the bottom plate 10, or the inlet water nozzle 310 and the outlet water nozzle 320 are arranged on the two sides of the side plate 20 respectively. The setting position of the inlet water nozzle 310 and the outlet water nozzle 320 along the length direction of the bottom plate 10 can be adaptively set according to needs, so as to adapt to different installation scenes, and thus facilitate to improve the application range of the battery pack.

[0050] As shown, Figure 4 The side plate 20 further includes a second partition plate 220, the second partition plate 220 is arranged in the inside of the second flow channel 210, the second partition plate 220 divides the second flow channel 210 into a plurality of second sub-flow channels 211 arranged in the height direction of the side plate 20, the second partition plate 220 has a via hole 221 communicated with the second sub-flow channel 211, and the via holes 221 on the adjacent two second partition plates 220 are arranged at the two ends of the second sub-flow channel 211 along the length direction of the bottom plate 10.

[0051] The second partition plate 220 is arranged in the inside of the second flow channel 210 to form a plurality of second sub-flow channels 211 arranged in the height direction in the inside of the side plate 20. The plurality of second partition plates 220 arranged in the height direction of the side plate 20 not only optimizes the flow path of the cooling liquid and improves the heat exchange efficiency, but also enhances the structural strength of the battery box and reduces the risk of vibration and impact of the battery cell 100 in the transportation or operation process.

[0052] In this embodiment, the second partition 220 is arranged parallel to the bottom plate 10.

[0053] Specifically, the through holes 221 on the two adjacent second partitions 220 form an inlet and an outlet respectively along the length of the bottom plate 10. The liquid coolant enters the interior of the second sub-channel 211 formed by the two adjacent second partitions 220 through the inlet, and flows out through the outlet after filling the second sub-channel 211. This increases the flow path of the liquid coolant and ensures that the liquid coolant flows to the bottom plate 10 after filling the interior of the side plate 20, which is beneficial to improving the cooling efficiency of the side plate 20.

[0054] In this embodiment, multiple second partitions 220 are provided, and multiple second partitions 220 form multiple second sub-channels 211. The water nozzle 30 is connected to the second sub-channel 211 at the top. Along the length direction of the side plate 20, the water nozzle 30 is provided on the side of the through hole 221 on the second partition 220 away from the top.

[0055] The water inlet nozzle 310 is connected to the second sub-channel 211 at the top of the interior of the side plate 20. The liquid coolant enters the interior of the side plate 20 through the water inlet nozzle 310, and after filling multiple second sub-channels 211 in sequence along the height direction of the side plate 20, the liquid coolant flows to the first channel 110 inside the bottom plate 10.

[0056] The water outlet nozzle 320 is connected to the second sub-channel 211 at the top of the interior of the side plate 20. The liquid coolant inside the first channel 110 enters the interior of the second sub-channel 211 at the bottom of the side plate 20. The liquid coolant flows to the top of the side plate 20 and fills the entire second channel 210 in sequence before flowing out from the water outlet nozzle 320.

[0057] like Figures 5 to 8 As shown, the first flow channel 110 on the base plate 10 cools the bottom of the cell 100.

[0058] Specifically, the base plate 10 includes a first partition 150, which is disposed inside the first flow channel 110. The first partition 150 extends along the width direction of the base plate 10 and divides the first flow channel 110 into a plurality of first sub-flow channels 111 spaced apart along the length direction of the base plate 10. Both ends of the plurality of first sub-flow channels 111 along the width direction of the base plate 10 are connected to the second flow channel 210.

[0059] The first partition 150 is provided in multiple ways, and the multiple first partitions 150 are spaced apart along the length direction of the bottom plate 10. The two ends of the first sub-flow channel 111 are connected to the second flow channel 210 to realize the flow of liquid coolant.

[0060] Specifically, the liquid coolant in the interior of the second flow channel 210 of one of the side plates 20 flows into the interior of the first sub-flow channel 111, and then enters the interior of the second flow channel 210 of the other side plate 20, respectively, to complete the flow of the liquid coolant.

[0061] In the embodiment, a plurality of first sub-flow channels 111 are arranged along the length direction of the bottom plate 10, and the plurality of first sub-flow channels 111 are arranged in a spaced and independent manner to form the structure of the harmonica tube. The size of the first sub-flow channel 111 is adjusted by controlling the distance between the two adjacent first partitions 150, so as to set the size of the harmonica tube in different regions, and then control the flow rate of the liquid coolant in different first sub-flow channels 111, and control the heat conduction efficiency of the bottom plate 10 in different regions to the battery cell 100.

[0062] As shown in Figure 1 The battery box further includes a frame beam 40 and a support beam 50. The frame beam 40 is arranged at both ends of the bottom plate 10 along the length direction of the bottom plate 10. The bottom plate 10, the side plate 20 and the frame beam 40 form a groove structure 120 for accommodating the battery cell 100. The support beam 50 is arranged in the interior of the groove structure 120.

[0063] The frame beam 40 includes a front frame beam and a rear frame beam arranged at both ends of the length direction of the bottom plate 10. The front frame beam, the rear frame beam, the side plate 20 and the bottom plate 10 cooperatively form the groove structure 120 to facilitate placing the battery cell 100.

[0064] The arrangement of the frame beam 40 and the support beam 50 not only improves the overall mechanical strength of the battery box, but also improves the protection capability of the battery cell 100. At the same time, the structure is simple and convenient to install, which is beneficial to improve the assembly efficiency.

[0065] The frame beam 40 and the support beam 50 are welded and fixed with the bottom plate 10 and the side plate 20 to improve the strength of the battery box.

[0066] In the embodiment, the support beam 50 includes a baffle and a cross arrangement of horizontal and vertical beam structures. Arranging the support beam 50 in the interior of the groove structure 120 is beneficial to further improve the strength of the battery box, and thus better protect the battery cell 100. Of course, the number of the arranged support beam 50 is adaptively arranged according to the arrangement position and number of the battery cell 100.

[0067] As shown in Figures 1 to 3 The side of the frame beam 40 away from the groove structure 120 and the side of the side plate 20 away from the groove structure 120 are respectively provided with a fixing structure 1010.

[0068] In the embodiment, the battery box further comprises a reinforcing plate 60, the reinforcing plate 60 is arranged on the side of the bottom plate 10 away from the groove structure 120, the reinforcing plate 60 comprises fasteners, and the reinforcing plate 60 is fixedly connected with the frame beam 40 and the side plate 20 through the fasteners cooperating with the fixing structure 1010, wherein the fasteners are structural members such as bolts, and the fixing structure 1010 is provided with mounting holes threaded with the fasteners.

[0069] Specifically, the reinforcing plate 60 arranged at the bottom of the bottom plate 10 is beneficial to increase the strength of the bottom of the battery box. The reinforcing plate 60 can be a steel plate.

[0070] In the embodiment, the reinforcing plate 60 is fixedly connected with the bottom plate 10 and the frame beam 40 through the fasteners, which is beneficial to improve the stability of the installation of the reinforcing plate 60 and also has the effect of facilitating disassembly. The fasteners are structural members such as bolts.

[0071] In the embodiment, the battery box further comprises a bottom heat insulation member 710 arranged between the reinforcing plate 60 and the bottom plate 10. The reinforcing plate 60 increases the strength of the battery box, and the bottom heat insulation member 710 can effectively insulate the influence of the external environment on the battery pack, improve the environmental adaptability and safety of the battery pack. In addition, the arrangement of the bottom heat insulation member 710 can reduce the energy loss of the liquid coolant in the first flow channel 110 of the bottom plate 10, and ensure the efficiency of the heat preservation performance of the bottom cooling of the box body.

[0072] The bottom heat insulation member 710 is heat insulation foam.

[0073] In the embodiment, the periphery of the bottom plate 10 and the reinforcing plate 60 are coated with sealant 80. The sealant 80 is arranged between the bottom plate 10 and the reinforcing plate 60 to avoid gaps between the bottom plate 10 and the reinforcing plate 60, so that the structure formed by the bottom plate 10, the bottom heat insulation member 710 and the reinforcing plate 60 has good heat preservation efficiency and reduces the heat dissipation inside and outside the package.

[0074] It can be understood that in the present application, the area of the bottom plate 10 is smaller than the area of the reinforcing plate 60, and the area of the bottom heat insulation member 710 is smaller than or equal to the area of the bottom plate 10.

[0075] In the embodiment, the reinforcing plate 60 is fixedly connected with the frame beam 40 and the side plate 20 through the fasteners, and the bottom plate 10 and the bottom heat insulation member 710 are glued to the reinforcing plate 60. Compared with the prior art in which the bottom plate is fixed with the side plate through bolts, the vertical space of the bolts is saved.

[0076] In the embodiment, in order to further improve the constant temperature effect of the battery box, the battery box further comprises a side heat insulation piece 720 arranged on the outer side of the side plate 20, the liquid coolant in the second flow channel 210 of the side plate 20 is kept warm by arranging the side heat insulation piece 720 on the outer side of the side plate 20, so as to avoid the energy loss caused by the environment; meanwhile, the side heat insulation piece 720 arranged on the outer side of the side plate 20 also has the technical effect of protection.

[0077] The side heat insulation piece 720 is heat insulation foam.

[0078] In the embodiment, the battery box further comprises a heat-conducting glue 90 arranged on the surface of the bottom plate 10 on the side facing the battery cell 100, which is used for fixing and heat conduction of the battery cell 100.

[0079] By arranging the heat-conducting glue 90 between the bottom plate 10 and the battery cell 100, the cooling efficiency of the bottom plate 10 is improved; by arranging the heat-conducting glue 90, the battery cell 100 can be fixed and adhered to the bottom plate 10, thereby improving the stability of the battery cell 100 fixed in the battery box.

[0080] Embodiment two

[0081] The embodiment provides a battery pack, which comprises the battery cell 100 and the battery box in the embodiment one.

[0082] The battery box adopted by the battery pack in the embodiment optimizes the space utilization rate, and the arrangement of the first flow channel 110 and the second flow channel 210 in the battery box improves the thermal management efficiency of the battery box, thereby improving the overall performance and safety of the battery pack.

[0083] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0084] The battery box of the application arranges the first flow channel 110 on the bottom plate 10 and the second flow channel 210 on the side plate 20, the first flow channel 110 and the second flow channel 210 are communicated to form a liquid cooling flow channel for liquid coolant flow, and the bottom plate and the side plate are connected by welding, compared with the bolt connection mode of the bottom plate and the side plate of the box in the prior art, not only the liquid cooling flow channel and the bottom plate and the side plate of the battery box are integrated, but also the space occupation in the battery box is reduced, thereby improving the space utilization rate of the battery box.

[0085] The battery box of the present application adopts the first flow channel 110 and the second flow channel 210 formed in the bottom plate 10 and the side plate 20 to flow the liquid coolant, so that the bottom plate 10 and the side plate 20 not only have the effect of increasing the mechanical strength of the battery pack and protecting the battery cell 100, but also improve the thermal management efficiency of the battery box, ensure the temperature stability of the battery cell 100 under various working conditions, and thus improve the overall performance and safety of the battery pack.

[0086] The present application realizes dynamic flow of the liquid coolant between the water nozzle 30, the side plate 20 and the bottom plate 10 by arranging the water nozzle 30, thereby facilitating temperature control and improving cooling efficiency; the battery box of the present application arranges the water nozzle 30 on the side plate 20, has a simple overall structure, and the arrangement position of the water nozzle 30 is easy to connect with the liquid coolant providing device outside, thereby facilitating assembly efficiency.

[0087] Obviously, the above-described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0088] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0089] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0090] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery box characterized by, The battery box comprises: a bottom plate (10) comprising an upper plate body (130) and a lower plate body (140) arranged at intervals in the height direction, a first flow channel (110) extending in the width direction of the bottom plate (10) being arranged between the upper plate body (130) and the lower plate body (140); two side plates (20) comprising a first plate body (230) and a second plate body (240) arranged at intervals in the width direction of the bottom plate (10), a second flow channel (210) extending in the length direction of the bottom plate (10) being arranged between the first plate body (230) and the second plate body (240) of the side plate (20); the two side plates (20) are respectively arranged at the two ends of the bottom plate (10) in the width direction, the two ends of the upper plate body (130) are respectively welded to the first plate body (230) of the two side plates (20), the two ends of the lower plate body (140) are respectively welded to the second plate body (240) of the two side plates (20), and the two ends of the first flow channel (110) are respectively communicated with the second flow channel (210) of the two side plates (20).

2. The battery box according to claim 1, wherein the two ends of the upper plate body (130) are respectively brazed to the first plate body (230) of the two side plates (20), and the two ends of the lower plate body (140) are respectively brazed to the second plate body (240) of the two side plates (20). The battery box further comprises:

3. The battery pack of claim 1, wherein, a frame beam (40) arranged at the two ends of the bottom plate (10) in the length direction of the bottom plate (10), the bottom plate (10), the side plate (20) and the frame beam (40) forming a groove structure (120) for accommodating the battery cell (100); a fixing structure (1010) is arranged on the side of the frame beam (40) away from the groove structure (120) and the side of the side plate (20) away from the groove structure (120); a reinforcing plate (60) is arranged on the side of the bottom plate (10) away from the groove structure (120), the reinforcing plate (60) comprises a fastener, and the reinforcing plate (60) is fixedly connected with the frame beam (40) and the side plate (20) by cooperating with the fixing structure (1010) through the fastener. The battery box further comprises a bottom heat insulating member (710), 4. The battery pack of claim 3, wherein, the bottom heat insulating member (710) is arranged between the reinforcing plate (60) and the bottom plate (10), and a sealant (80) is arranged between the peripheral edge of the bottom plate (10) and the reinforcing plate (60). The battery box further comprises:

5. The battery pack of claim 1, wherein, a baffle, a transverse and longitudinal beam structure, and a heat-conducting adhesive (90) arranged on the surface of the side of the bottom plate (10) facing the battery cell (100) for fixing and heat conduction of the battery cell (100). The battery box further comprises a side heat insulating member (720) arranged on the outer side of the side plate (20).

6. The battery pack of claim 1, wherein, The bottom plate (10) further comprises:

7. The battery box according to any one of claims 1 to 6, characterized by ​ A first partition plate (150) is arranged inside the first flow channel (110), extends along the width direction of the bottom plate (10), and separates the first flow channel (110) into a plurality of first sub-flow channels (111) arranged along the length direction of the bottom plate (10), and the plurality of first sub-flow channels (111) are communicated with the second flow channel (210) at both ends along the width direction of the bottom plate (10).

8. The battery box according to any one of claims 1 to 6, characterized by The side plate (20) further comprises: A second partition plate (220) is arranged inside the second flow channel (210), separates the second flow channel (210) into a plurality of second sub-flow channels (211) arranged along the height direction of the side plate (20), and has a through hole (221) communicated with the second sub-flow channel (211) on the second partition plate (220), two adjacent second sub-flow channels (211) are communicated through the through hole (221), and the through holes (221) on two adjacent second partition plates (220) are arranged at both ends of the second sub-flow channel (211) along the length direction of the bottom plate (10) respectively.

9. The battery pack of claim 8, wherein, The battery box further comprises a water nozzle (30) arranged on the side plate (20), the water nozzle (30) is communicated with the top end of the second sub-flow channel (211), and the water nozzle (30) is arranged on the side away from the through hole (221) on the second partition plate (220) along the length direction of the bottom plate (10).

10. A battery pack, characterized by, The battery pack comprises the battery box according to any one of claims 1 to 9.

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