A battery housing structure and energy storage battery system

Abstract

This utility model discloses a battery box structure and an energy storage battery system. The battery box structure includes a tray; a top cover is provided on the top of the tray; the front panel of the top cover is provided with a first panel and a second panel; the tray includes a liquid-cooled base plate; the liquid-cooled base plate includes multiple profile base plates; any two adjacent profile base plates are fixedly connected; the top of the profile base plates is used to place multiple individual battery cells; the profile base plates are provided with a first flow channel cavity for liquid inlet and a second flow channel cavity for liquid outlet, as well as an inlet port communicating with the first flow channel cavity and an outlet port communicating with the second flow channel cavity; the first flow channel cavity and the second flow channel cavity are connected; a liquid distribution module is provided at the front end of the liquid-cooled base plate; the liquid distribution module includes a liquid inlet cavity communicating with the liquid inlet and an outlet cavity communicating with the liquid outlet, which are separated from each other; an inlet water nozzle and an outlet water nozzle are respectively provided at both ends of the liquid distribution module. This utility model can reliably dissipate heat and heat the battery inside the box, ensuring heat dissipation and temperature uniformity, and improving the temperature consistency of the battery inside the box.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion energy storage battery system technology, and in particular to a battery box structure and energy storage battery system. Background Technology

[0002] Currently, with the rapid development of industrial and commercial energy storage, the demand for integrated energy storage cabinets and energy storage containers is increasing. To ensure the long-term operation of energy storage battery systems, battery packs consisting of multiple batteries mostly adopt liquid cooling.

[0003] Within the battery industry, the battery sizes of various lithium battery companies are becoming increasingly similar, but due to market demand, there is a need to design multiple energy storage boxes to meet the needs of different projects.

[0004] However, the existing battery enclosure structure is poorly designed and cannot reliably dissipate heat and heat multiple batteries inside the enclosure. The heat dissipation and temperature uniformity are poor, and the temperature consistency of the batteries inside the enclosure cannot be guaranteed, which affects the working performance of the energy storage battery system.

[0005] Therefore, there is an urgent need to develop a technology that can solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to address the technical deficiencies of the existing technology by providing a battery box structure and an energy storage battery system.

[0007] Therefore, this utility model provides a battery box structure, which includes horizontally distributed trays;

[0008] The tray has a hollow top cover with an opening at the bottom;

[0009] The front panel of the top cover has an opening for sealing, and a first panel and a second panel are provided.

[0010] The pallet includes a liquid-cooled base plate; the liquid-cooled base plate includes multiple parallel profile base plates.

[0011] Any two adjacent profile base plates are fixedly connected on opposite sides;

[0012] The top of each profile base plate is used to place multiple individual battery cells;

[0013] Each profile base plate is provided with a first flow channel cavity for liquid inlet and a second flow channel cavity for liquid outlet, as well as a liquid inlet and a liquid outlet;

[0014] The first flow channel cavity and the second flow channel cavity are connected;

[0015] The inlet is connected to the first flow channel cavity; the outlet is connected to the second flow channel cavity.

[0016] A liquid distribution module is provided at the top front end of the liquid-cooled base plate;

[0017] The liquid separation module includes a hollow inlet chamber and an outlet chamber that are separated from each other.

[0018] The inlet is connected to the inlet chamber; the outlet is connected to the outlet chamber.

[0019] The liquid separation module is equipped with an inlet nozzle and an outlet nozzle at its left and right ends, respectively.

[0020] The inlet nozzle is connected to the inlet chamber; the outlet nozzle is connected to the outlet chamber.

[0021] As can be seen from the technical solution provided by this utility model above, compared with the prior art, this utility model provides a battery box structure and energy storage battery system. The design is scientific and can reliably dissipate heat and heat multiple batteries in the box, ensuring the effect of heat dissipation and temperature uniformity, improving the temperature consistency of the batteries in the box, and thus improving the working performance of the energy storage battery system, which has significant practical significance.

[0022] Through testing, the battery box structure of this utility model is confirmed to be a novel energy storage box. Its internal flow channel design enables uniform heat dissipation and heating of multiple batteries. The small size of this energy storage box effectively addresses the technical shortcomings of existing battery boxes, offering better size compatibility and superior performance for existing integrated cabinet or containerized energy storage applications. Attached Figure Description

[0023] Figure 1 A three-dimensional structural diagram of a battery box structure provided by this utility model. Figure 1 ;

[0024] Figure 2a A three-dimensional exploded disassembly diagram of a battery box structure provided by this utility model;

[0025] Figure 2b for Figure 2a A magnified view of a portion of the image;

[0026] Figure 3 A three-dimensional structural diagram of the tray in a battery box structure provided by this utility model;

[0027] Figure 4 A three-dimensional exploded disassembly diagram of a tray in a battery box structure provided by this utility model, viewed from front to back.

[0028] Figure 5 A three-dimensional exploded disassembly diagram of the tray in a battery box structure provided by this utility model, viewed from back to front.

[0029] Figure 6a This utility model provides a cross-sectional schematic diagram of a liquid-cooled bottom plate in a battery box structure;

[0030] Figure 6b For along Figure 6a A cross-sectional view of line AA shown;

[0031] Figure 6c for Figure 6a An enlarged schematic diagram of part B shown in the image;

[0032] Figure 7 This utility model provides an exploded view of the front end of a liquid-cooled base plate in a battery box structure, used to demonstrate the assembly and sealing method of the front part of the profile base plate;

[0033] Figure 8 for Figure 7 A magnified view of a portion of the image;

[0034] Figure 9 This utility model provides an exploded view of the rear end of a liquid-cooled base plate in a battery box structure, used to illustrate the processing and sealing methods of the rear end of the profile base plate.

[0035] Figure 10 This is a bottom view of the liquid-cooled base plate. This diagram is a partial exploded view taken from bottom to top, used to show the combination of the bottom reinforcing beams and the arc-shaped fins on the upper part of the flow channel cavity of the profile base plate.

[0036] Figure 11 for Figure 10 A magnified view of a portion of the image;

[0037] Figure 12 This is a schematic diagram showing the combination of the upper front surface of the liquid-cooled base plate and the liquid distribution module when viewed from the back to the front.

[0038] Figure 13 A schematic diagram of a semi-finished battery box structure provided by this utility model Figure 1 ;

[0039] Figure 14 A schematic diagram of a semi-finished battery box structure provided by this utility model (II);

[0040] Figure 15 for Figure 14 A magnified view of a portion of the image;

[0041] Figure 16 A three-dimensional structural diagram of a battery box structure provided by this utility model (II);

[0042] Figure 17 for Figure 16A magnified view of a portion of the image;

[0043] In the diagram, 1 is the first panel, 2 is the second panel, 3 is the top cover, and 4 is the tray.

[0044] 401. Profile base plate; 402. Rear plug; 403. Front plug; 4041. First flow channel cavity; 4042. Second flow channel cavity; 405. Liquid inlet; 406. Liquid outlet; 407. Cold plate reinforcement fixing hole; 408. Flange face; 409. Cold plate cavity; 4010. Bottom reinforcement beam.

[0045] 4011, Reinforcing beam fixing hole; 4012, Cold plate middle reinforcing fixing hole; 4013, Arc-shaped fin; 4014, Flow channel isolation support reinforcing rib; 4015, Liquid accumulation chamber; 4016, Liquid inlet nozzle; 4017, Liquid outlet nozzle; 4018, Water inlet chamber baffle; 4019, Module mounting beam; 4020, Box cover fixing beam.

[0046] 4021. Module fixing nut; 4022. Box cover fixing nut; 4023. Box cover fixing barrier; 4024. Box cover fixing nut; 4025. Module installation area; 4026. Electrical component installation area; 4027. Box fixing block; 4028. Lifting angle iron; 4029. Box tail limit block; 4030. Angle iron fixing hole.

[0047] 4031, Insert box fixing threaded hole; 4032, Insert box tail fixing threaded hole; 4033, Lifting hole; 4034, Reinforcing beam middle fixing hole;

[0048] 301. Box cover flange face; 302. Box cover fixing hole; 303. Box cover flange face reinforcement plate;

[0049] 5. Liquid-cooled base plate, 6. Liquid distribution module, 7. Liquid accumulation chamber plug, 8. Liquid inlet chamber, 9. Liquid outlet chamber. Detailed Implementation

[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0051] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0052] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0053] See Figure 1 , Figures 2a to 2b , Figures 3 to 5 , Figures 6a to 6c , Figures 7 to 17 This utility model provides a battery box structure, which is a battery box structure for liquid cooling and liquid thermal energy storage, applied in the field of energy storage technology, and includes horizontally distributed trays 4;

[0054] The top of the tray 4 is provided with a hollow cover 3 with an opening at the bottom;

[0055] On the front panel of the top cover 3, the opening is sealed with a first panel 1 and a second panel 2;

[0056] See Figures 3 to 5 as well as Figure 6a , Figure 6b , Figure 7 As shown, tray 4 includes a liquid-cooled base plate 5;

[0057] The liquid-cooled base plate 5 includes multiple (e.g., four) parallel profile base plates 401;

[0058] Any two adjacent profile base plates 401 are fixedly connected on opposite sides;

[0059] The top of each profile base plate 401 is used to place multiple individual battery cells (i.e. heat dissipation objects, specifically multiple individual battery cells that are distributed horizontally and arranged vertically in sequence).

[0060] Each profile base plate 401 is provided with a first flow channel cavity 4041 for liquid inlet and a second flow channel cavity 4042 for liquid outlet, as well as a liquid inlet 405 and a liquid outlet 406.

[0061] The first flow channel cavity 4041 and the second flow channel cavity 4042 are connected;

[0062] The liquid inlet 405 is connected to the first flow channel cavity 4041;

[0063] The liquid outlet 406 is connected to the second flow channel cavity 4042;

[0064] See Figure 2a , Figure 2b , Figure 4 , Figure 5 as well as Figure 12 A liquid distribution module 6 is provided at the top front end of the liquid-cooled base plate 5;

[0065] The liquid separation module 6 includes a hollow inlet chamber 8 and an outlet chamber 9 that are separated from each other.

[0066] Inlet 405 is connected to inlet chamber 8;

[0067] The liquid outlet 406 is connected to the liquid outlet chamber 9;

[0068] The left and right ends of the liquid separation module 6 are respectively provided with an inlet water nozzle 4016 and an outlet water nozzle 4017.

[0069] The liquid inlet nozzle 4016 is connected to the liquid inlet chamber 8;

[0070] The liquid outlet nozzle 4017 is connected to the liquid outlet chamber 9.

[0071] In this utility model, specifically, a thermally conductive gel is applied between the bottom of the single battery cell placed on the top of the profile base plate 401 and the top surface of the profile base plate 401.

[0072] In this utility model, specifically, any two adjacent profile base plates 401 are fixed on opposite sides by laser welding.

[0073] In this utility model, specifically, the first panel 1 and the second panel 2 are a high-voltage panel and a low-voltage panel, respectively.

[0074] The first panel 1, which is made of sheet metal, is used to install existing mature electrical components such as positive power connectors, negative power connectors, and MSD (manual maintenance switch). These components are fixedly connected to the first panel 1 with bolts.

[0075] As the second panel of the low-voltage panel, it is made of sheet metal and is used to install existing mature battery box supporting components such as communication aviation plugs, fire extinguishing modules and vent valves.

[0076] In this utility model, specifically, the first panel 1 and the second panel 2 are respectively fixed to the front panel of the upper cover 3 by a plurality of first bolts and a plurality of second bolts;

[0077] In practice, the first panel 1 is installed on the inside of the front panel of the upper cover 3;

[0078] The four edges of the first panel 1 are provided with a plurality of threaded fixing holes for the first panel;

[0079] The front panel of the top cover 3 has a first through hole in the front panel at a position corresponding to each threaded fixing hole of the first panel;

[0080] The first bolt passes through the first through hole and the first threaded fixing hole of the front panel in sequence, and is threadedly fixed to the first threaded fixing hole of the front panel.

[0081] A first sealing ring is provided between the four edges of the first panel 1 and the inner side of the front panel of the upper cover 3;

[0082] It should be noted that the first sealing ring has a through hole at the position corresponding to the first bolt, allowing the first bolt to pass through. In this invention, the first sealing ring is installed at the overlapping portion between the first panel 1 and the front panel of the upper cover 3 to achieve a sealing function.

[0083] In practice, the second panel 2 is installed on the outside of the front panel of the top cover 3;

[0084] The second panel 2 has multiple through holes arranged around its four edges;

[0085] The front panel of the top cover 3 has a front panel second threaded fixing hole at a position corresponding to each second panel through hole;

[0086] The second bolt passes through the corresponding second panel through hole and the front panel second threaded fixing hole in sequence, and is threadedly fixed to the front panel second threaded fixing hole;

[0087] A second sealing ring is provided between the four edges of the second panel 2 and the outer side of the front panel of the top cover 3;

[0088] It should be noted that the second sealing ring has a through hole at the position corresponding to the second bolt, allowing the second bolt to pass through. In this invention, the second sealing ring is installed at the overlapping portion between the second panel 2 and the front panel of the upper cover 3 to achieve a sealing function. As a low-voltage panel, the second panel 2 faces the control slave board or other vulnerable components located inside the battery box structure, allowing for easy disassembly and maintenance.

[0089] In this utility model, the upper cover 3 is made of sheet metal, but it may also be adjusted to vacuum forming or injection molding material as needed. The embodiment of this utility model only takes sheet metal as an example.

[0090] In this utility model, for specific implementation, see [link to relevant documentation]. Figure 16 , Figure 17 As shown, a box cover flange surface 301 is provided around the bottom perimeter of the upper cover 3;

[0091] Multiple spaced-apart box cover fixing holes 302 are provided on the box cover flange surface 301;

[0092] On the left and right sides of the cover flange face 301, vertically upward cover flange face reinforcement plates 303 are provided;

[0093] Vertically downward reinforcing plates 303 are provided on both the front and rear sides of the cover flange face 301.

[0094] In practice, a sealing strip is provided between the bottom of the cover flange 301 and the tray 4, arranged in a ring.

[0095] It should be noted that, in this utility model, the reinforcing plate 303 on the flange surface of the box cover is used to strengthen the strength of the flange surface 301 of the box cover and reduce the risk of deformation.

[0096] It should be noted that the overlapping area between the flange face 301 of the box cover and the tray 4 is used to install sealing elements (such as sealing strips) to achieve the sealing function;

[0097] In this utility model, specifically, each profile base plate 401 includes four flow channel cavities;

[0098] The four flow channel cavities include: two first flow channel cavities 4041 and two second flow channel cavities 4042;

[0099] Each profile base plate 401 has two longitudinally distributed first flow channel cavities 4041 on its inner side.

[0100] On each side of the two first flow channel cavities 4041 that are opposite to each other, there is a second flow channel cavity 4042;

[0101] It should be noted that the two first flow channel cavities 4041 and the two second flow channel cavities 4042 have the same dimensions. Among them, the two first flow channel cavities 4041 located on the inner side are flow channel cavities for liquid inlet, and the two second flow channel cavities 4042 located on the outer side are flow channel cavities for liquid outlet.

[0102] Each profile base plate 401 has a cold plate cavity 409 at its left and right ends (i.e., the left and right sides of the whole composed of four flow channel cavities).

[0103] It should be noted that the dimensions of the two cold plate cavities 409 are the same;

[0104] At the front end of the upper panel of each profile base plate 401, two liquid outlets 406 are vertically provided. These two liquid outlets 406 are correspondingly provided at the middle of the front end of the second flow channel cavity 4042 for liquid discharge, and are connected to the second flow channel cavity 4042.

[0105] At the front end of the upper panel of each profile base plate 401, two liquid inlets 405 are vertically provided. These liquid inlets 405 are corresponding to the middle of the front end of the first flow channel cavity 4041 for liquid inlet and are connected to the first flow channel cavity 4041.

[0106] For each profile base plate 401, each first flow channel cavity 4041 for liquid inlet is connected to the adjacent second flow channel cavity 4042 for liquid outlet.

[0107] In practice, each flow channel cavity has flow channel isolation support reinforcing ribs 4014 on both the left and right sides;

[0108] It should be noted that the flow channel isolation support rib 4014 serves to provide strength support and separate the flow direction of coolant; the flow channel isolation support rib 4014 is located between the two flow channel cavities.

[0109] For each profile base plate 401, the rear end of each liquid inlet first flow channel cavity 4041 is connected to the rear end (i.e., tail) of the adjacent liquid outlet second flow channel cavity 4042 through a liquid passage (the liquid passage is specifically: a notch provided on the flow channel isolation support reinforcing rib 4014 located between the liquid inlet first flow channel cavity 4041 and the adjacent liquid outlet second flow channel cavity 4042).

[0110] In practice, the center points of the two liquid inlets 405 are located on the same straight line;

[0111] The center points of the two liquid outlets 406 are located on the same straight line;

[0112] The center points of the liquid inlet 405 and the liquid outlet 406 are not on the same straight line;

[0113] The liquid outlet 406 is closer to the front end face of the profile base plate 401 than the liquid inlet 405;

[0114] In specific implementation, the front end of the four flow channel cavities of the profile base plate 401 is respectively sealed with a front plug 403;

[0115] The rear ends of the four flow channel cavities of the profile base plate 401 are sealed with two rear plugs 402. It should be noted that, for this utility model, the front of the four flow channel cavities of the profile base plate 401 is sealed by laser welding using front plugs 403.

[0116] It should be noted that, in specific implementation, the flow channel isolation support reinforcing ribs 4014 on both sides of the tail (i.e. the rear end) of the profile base plate 401 need to be machined inwards a certain distance, and at this time, the rear plug 402 is used for laser welding to seal it.

[0117] It should be noted that the front plug 403 has the same cross-sectional dimensions as one flow channel cavity. Four front plugs 403 are placed into the flow channel cavity at the front end of the profile base plate 401 and sealed and fixed using laser welding. The rear plug 402 has the same cross-sectional dimensions as the sum of the two flow channel cavities. Two rear plugs 402 are placed into the rear end of the profile base plate 401 and sealed and fixed using laser welding.

[0118] It should be noted that the upper surface of the front part of the profile base plate 401 has four oblong holes, which correspond to the four flow channel cavities respectively. The two oblong holes in the middle are in a straight line and are liquid outlets 406, while the two oblong holes on both sides are in a straight line and are liquid inlets 405. The liquid outlets 406 and liquid inlets 405 are not in a straight line.

[0119] It should be noted that when the liquid used for cooling or heating flows into the flow channel cavity 404 from the inlet 405, it flows towards the tail (i.e., the rear end) of the profile base plate 401, passes through the flow channel isolation support reinforcement rib 4014 (i.e. the liquid passage formed by processing) which has been processed at the tail end, flows towards the front of the profile base plate 401, and finally flows out from the outlet 406. The heat inside the battery box is transferred to the coolant through the arc-shaped fins 4013 to achieve heat exchange.

[0120] In practice, multiple arc-shaped fins 4013 are provided inside the four flow channel cavities and the cold plate cavity 409 on the side (i.e., the upper side) close to the individual cell.

[0121] It should be noted that the arc-shaped fins 4013 are used to increase the heat conduction area, that is, to increase the heat exchange area.

[0122] It should be noted that the tray 4 is an assembly, consisting of a liquid-cooled base plate 5 and several accessories. The liquid-cooled base plate 5 can be composed of four profile base plates 401. The front side of the profile base plate 401 has a flange face 408. The flange faces 408 of the two middle profile base plates 401 need to be machined off to facilitate the four profile base plates 401 to be assembled into a whole. Any two adjacent profile base plates 401 can be fixed by laser welding (specifically, full welding).

[0123] In practice, four processed profile base plates 401 are placed horizontally in the welding fixture and pressed together. The joints between any two adjacent profile base plates 401 are fully welded and fixed using laser welding. The eight liquid outlets 406 on the four welded profile base plates 401 are in a straight line. Similarly, the eight liquid inlets 405 are also in a straight line.

[0124] It should be noted that the profile base plate 401 has four flow channel cavities. Each profile base plate 401 forms two liquid flow channels running from front to back and then from back to front. The tail ends of the two flow channel isolation support ribs 4014 between the two first flow channel cavities 4041 and the two adjacent second flow channel cavities 4042 need to be machined inwards for a certain distance (i.e., forming a liquid passage for connecting the two adjacent flow channel cavities). When the flow channel cavities are closed front and back, the coolant can change its flow direction through this point. The front of the four flow channel cavities is sealed by four front blocking blocks 403, and the tail ends of the four flow channel cavities are sealed by two rear blocking blocks 402.

[0125] In this utility model, the profile base plate 401 has four evenly distributed hollow flow channel cavities that run through the front and back, and the flow channel cavities can serve as flow channels for coolant.

[0126] It should be noted that the flow channel isolation support ribs 4014 exist between the four flow channel cavities. The two flow channel isolation support ribs 4014 between the two first flow channel cavities 4041 and the two adjacent second flow channel cavities 4042 are machined to the same distance. Then, the rear plug 402 is placed in the machined empty groove and fixed by laser welding. At this time, if the coolant enters the first flow channel cavity 4041 (i.e., the flow channel cavity for liquid inlet) from the two liquid inlets 405 and flows backward, when it reaches the tail end, it passes through the notch at the machined flow channel isolation support ribs 4014 (i.e., forming a liquid passage for connecting the two adjacent flow channel cavities), realizing the change of liquid flow direction. Then it flows forward through the two second flow channel cavities 4042 (i.e., the flow channel cavity for liquid outlet) and finally flows out from the two liquid outlets 406, realizing heat transfer.

[0127] In practice, the base plate 401 is made of aluminum extrusion profile;

[0128] See Figure 10The profile base plate 401 has a flange face 408 on each of its left and right sides;

[0129] Each flange face 408 is provided with three pairs of cold plate reinforcement fixing holes 407;

[0130] It should be noted that flange face 408 is used for welding and installing other components.

[0131] In practice, the liquid-cooled base plate 5 is composed of four profile base plates 401 welded together, and the flange faces 408 of the two middle profile base plates 401 need to be machined off.

[0132] For specific implementation details, see [link / reference] Figure 4 , Figure 5 At the bottom of the liquid-cooled base plate 5, three horizontally distributed bottom reinforcing beams 4010 are fixedly connected;

[0133] Furthermore, participate Figure 10 , Figure 11 Each bottom reinforcing beam 4010 has a pair of reinforcing beam fixing holes 4011 at its left and right ends;

[0134] The liquid-cooled base plate 5 is provided with a pair of cold plate reinforcement fixing holes 407 at the positions corresponding to each pair of strong beam fixing holes 4011;

[0135] The reinforcing beam fixing hole 4011 and the cold plate reinforcing fixing hole 407 are fixed by riveting.

[0136] It should be noted that the bottom reinforcing beam 4010 is installed below the liquid-cooled base plate 5, and can be increased or decreased according to strength requirements; the bottom reinforcing beam 4010 has reinforcing beam fixing holes 4011 on both sides that match the cold plate reinforcing fixing holes 407 on the flange face 408;

[0137] It should be noted that a pair of cold plate reinforcement fixing holes 407 are respectively provided in the middle of the two profile base plates 401 located at the left and right ends of the liquid-cooled base plate 5, as well as at the front and rear ends; the bottom reinforcement beam 4010 is formed by stamping cold-rolled plate.

[0138] For specific implementation details, see [link / reference] Figure 14 , Figure 15 Each bottom reinforcing beam 4010 has a central fixing hole 4034 in the middle.

[0139] See Figure 10 A cold plate cavity 409 of the profile base plate 401 has a cold plate middle reinforcement fixing hole 4012.

[0140] The fixing hole 4034 in the middle of the reinforcing beam is set to correspond to the fixing hole 4012 in the middle of the cold plate, and is fixed by riveting;

[0141] It should be noted that the fixing hole 4034 in the middle of the reinforcing beam and the fixing hole 4012 in the middle of the cold plate are set in a one-to-one correspondence.

[0142] In practice, the sum of the lateral widths of the four flow channel cavities and the two cold plate cavities 409 matches the width of the individual battery cell placed on top of each profile base plate 401.

[0143] In this utility model, it should be noted that the liquid distribution module 6 is made of aluminum extrusion profile, and its two welded edges can form a hollow liquid inlet cavity 8. The liquid inlet 405 on the four profile base plates 401 covers the bottom inner side of the liquid inlet cavity 8. The liquid distribution module 6 has a liquid outlet cavity 9, one side of which is a water cavity baffle 4018, and the liquid outlet 405 on the four profile base plates 401 covers the bottom inner side of the liquid outlet cavity 9.

[0144] In this utility model, specifically, the inlet nozzle 4016 only passes through the first layer of aluminum material of the liquid distribution module 6 to connect to the inlet chamber 8, and the coolant can reach the inlet chamber 8 through the inlet nozzle 4016; the outlet nozzle 4017 passes through the upper and lower layers of aluminum material of the liquid distribution module 6 and connects to the outlet chamber 9, and the coolant can connect to the inlet 4017 through the outlet chamber 9 and then flow to the outside.

[0145] In this invention, specifically, the left and right ends of the liquid outlet chamber 9 and the liquid inlet chamber 8 are opened and respectively sealed and fixedly connected to a liquid accumulation chamber block 7 (specifically, by laser welding).

[0146] It should be noted that, for this utility model, the liquid accumulation chamber 4015 is composed of an inlet water nozzle 4016, an outlet water nozzle 4017, a liquid distribution module 6, an inlet water chamber baffle 4018, and a liquid accumulation chamber block 7 welded together; the entire liquid accumulation chamber 4015 is installed at the front end of the liquid cooling base plate 5 and fixed by laser welding.

[0147] In specific implementation, the liquid inlet nozzle 4016 is fixed to the liquid distribution module 6 by welding; the liquid outlet nozzle 4017 is fixed to the liquid distribution module 6 by welding.

[0148] It should be noted that, in this utility model, the upper part of the liquid distribution module 6 is flat, and the lower part has two partitions extending out. The liquid distribution module 6 has round holes on both the left and right sides for corresponding installation with the inlet nozzle 4016 and the outlet nozzle 4017. The round hole on the left side that matches the inlet nozzle 4016 only penetrates the upper partition, while the round hole on the right side that matches the outlet nozzle 4017 penetrates both partitions. The inlet nozzle 4016 and the outlet nozzle 4017 are placed in the round holes on both sides of the liquid distribution module 6. The inlet nozzle 4016 is sealed and fixed on the upper layer by laser welding, and the outlet nozzle 4017, in addition to being sealed and fixed on the upper layer by laser welding, also needs to be sealed and fixed on the back by laser welding.

[0149] In practice, the liquid outlet nozzle 4017 and the liquid inlet nozzle 4016 are standard SAE connectors, both being hollow parts that run vertically through the liquid outlet. The processed liquid distribution module 6 is placed on the upper surface of the front end of the liquid-cooled base plate 5. The lower front partition of the liquid distribution module 6 is located between the liquid outlet 406 and the liquid inlet 405. After being fixed by laser welding, the liquid outlet 406 and the liquid inlet 405 can be isolated. The lower rear partition of the liquid distribution module 6 also needs to be welded to the upper surface of the liquid-cooled base plate 5 by laser welding. At this time, the liquid inlet chamber 8 is formed.

[0150] In practice, the inlet chamber baffle 4018 is placed between the lower front end of the liquid distribution module 6 and the upper surface of the front end of the liquid cooling base plate 5, and is fixed to the liquid distribution module 6 and the liquid cooling base plate 5 respectively by laser welding, thus forming the outlet chamber 9.

[0151] In practice, the left and right sides of the liquid inlet chamber 8 and the liquid outlet chamber 9 are provided with accidental liquid accumulation chamber block 7, which is sealed and fixed by laser welding. At this time, the coolant can flow into the liquid inlet chamber 8 through the hollow structure of the liquid inlet nozzle 4016, and then flow into the first flow channel chamber 4041 through the eight liquid inlets 405 at the front end of the liquid cooling base plate 5. After turning at the tail of the first flow channel chamber 4041 and the second flow channel chamber 4042, it flows out from the eight liquid outlets 406 into the liquid outlet chamber 9, and finally flows out through the hollow structure of the liquid outlet nozzle 4017 to achieve heat exchange.

[0152] It should be noted that, in specific implementation, the inlet nozzle 4016 and the outlet nozzle 4017 are connected to existing external liquid cooling equipment through hollow connecting pipes. For example, the inlet nozzle 4016 and the outlet nozzle 4017 are respectively connected to the outlet and inlet of an external cooling pump (such as a water pump) through hollow connecting pipes, and coolant is pre-filled in the first flow channel cavity 4041, the second flow channel cavity 4042, and the connecting pipes.

[0153] It should be noted that the coolant can be flame-retardant coolant or water. The external cooling pump (such as a water pump) provides circulation power for the coolant, ensuring its flow within the first flow channel 4041, the second flow channel 4042, and related connecting pipes, and controlling the coolant's flow rate. Specifically, radiators and heaters can be installed on the connecting pipes between the inlet nozzle 4016 and the outlet nozzle 4017 and the external cooling pump (such as a water pump) to facilitate cooling of the coolant in summer and heating of the coolant in winter.

[0154] In this utility model, for specific implementation, see [link to relevant documentation]. Figure 13 The top of the liquid separation module 6 is also fixedly equipped with a box cover fixing beam 4020;

[0155] In practice, the top of the box cover fixing beam 4020 and the liquid distribution module 6 are fixed by laser welding;

[0156] In practice, multiple box cover fixing nuts 4022 are riveted above the box cover fixing beam 4020;

[0157] Both ends of the box cover fixing beam 4020 are connected to the box cover fixing enclosure 4023;

[0158] The cover fixing baffle 4023 is fixed to the four edges of the liquid-cooled base plate 5 by laser welding;

[0159] Furthermore, a plurality of box cover fixing nuts 4024 are provided on the box cover fixing enclosure 4023;

[0160] In terms of specific implementation, a horizontally distributed module mounting beam 4019 is provided at the front and rear ends of the top of the liquid-cooled base plate 5.

[0161] It should be noted that the module mounting beam 4019 is placed inside the liquid-cooled base plate 5 and welded and fixed according to the module installation requirements;

[0162] Four pairs of module fixing nuts 4021 are provided on the module mounting beam 4019;

[0163] Furthermore, the area between the top of the liquid-cooled base plate 5 and the front module mounting beam 4019 and the liquid distribution module 6 is the electrical component mounting area 4026;

[0164] The remaining area on the top of the liquid-cooled base plate 5, excluding the electrical component mounting area 4026, is the module mounting area 4025;

[0165] It should be noted that, in specific implementation, one module mounting beam 4019 is placed on the upper surface of the rear of the liquid-cooled base plate 5 and contacts the rear cover fixing baffle 4023. It is fixed to the liquid-cooled base plate 5 and the cover fixing baffle 4023 by two laser welding processes. Another module mounting beam 4019 is placed on the upper surface of the liquid-cooled base plate 5 near the front end and fixed by laser welding. At this time, the module mounting area 4025 and the electrical component mounting area 4026 are formed.

[0166] It should be noted that the cover fixing beam 4020 and the liquid distribution module 6 in the liquid accumulation chamber 4015 overlap in the vertical direction (i.e., are stacked vertically), which reduces the size of the entire battery box structure in the front-back direction (i.e., longitudinal direction).

[0167] In practice, the upper surface of the box cover fixing barrier 4023 and the upper surface of the box cover fixing beam 4020 are on the same plane;

[0168] It should be noted that the cover fixing baffle 4023 is placed on the rear end and left and right ends of the upper surface of the liquid cooling base plate 5 and fixed by laser welding; the cover fixing beam 4020 is placed on the upper surface of the liquid distribution module 6 and fixed by laser welding. The upper surface of the cover fixing baffle 4023 and the upper surface of the cover fixing beam 4020 are on the same plane.

[0169] In practice, the cover fixing barrier 4023 has a concave notch at the position corresponding to the liquid outlet 4017 and the liquid inlet 4016.

[0170] It should be noted that the cover fixing baffle 4023 has an inward bend at the front end of the liquid cooling base plate 5, forming a concave notch, which can successfully avoid the liquid outlet nozzle 4017 and the liquid inlet nozzle 4016, ensuring that the external liquid cooling pipes can be smoothly inserted; at the same time, the front of the upper cover 3 also has an inward bend to ensure the consistency of the sealing plane.

[0171] In terms of specific implementation, the box cover fixing barrier 4023 is made of aluminum extrusion profile;

[0172] In terms of specific implementation, such as Figure 14 , Figure 15 As shown, a box fixing block 4027 is respectively set between the front ends of the left and right sides of the box cover fixing baffle 4023 and the front ends of the left and right sides of the liquid cooling base plate 5.

[0173] Each insert box fixing block 4027 is provided with two insert box fixing threaded holes 4031;

[0174] It should be noted that the insert box fixing block 4027 is placed between the bottom surface of the box cover fixing baffle 4023 and the top surface of the liquid cooling base plate 5, and is fixed by welding; the insert box fixing block 4027 is provided with two insert box fixing threaded holes 4031. When the insert box (i.e. the battery box structure of this utility model) is installed inside a cabinet, it can be fixed through the insert box fixing threaded holes 4031 on both sides.

[0175] In specific implementation, a box tail limit block 4029 is set between the left and right rear ends of the box cover fixing baffle 4023 and the left and right rear ends of the liquid cooling base plate 5.

[0176] Multiple (e.g., three) hoisting angle irons 4028 are fixedly installed between the insertion box fixing block 4027 and the insertion box tail limiting block 4029 on the same side.

[0177] It should be noted that the insertion box fixing block 4027 is located at the front, and the insertion box tail limiting block 4029 is located at the rear. Multiple lifting angle irons 4028 are evenly distributed between the insertion box fixing block 4027 and the insertion box tail limiting block 4029. The specific number can be increased or decreased according to the actual strength requirements.

[0178] Furthermore, the hoisting angle iron 4028 is provided with angle iron fixing holes 4030;

[0179] The holes 4030 for fixing angle iron, 407 for fixing cold plate reinforcement on flange face 408 of profile base plate 401, and 4011 for fixing reinforcement beam on bottom reinforcement beam 4010 of liquid-cooled base plate 5 are set in a positive correspondence.

[0180] It should be noted that one end of the lifting angle iron 4028 (i.e., the inner end) is also located between the bottom surface of the cover fixing baffle 4023 and the top surface of the liquid-cooled base plate 5. The end of the lifting angle iron 4028 with the angle iron fixing hole 4030 is welded and fixed between the cover fixing baffle 4023 and the liquid-cooled base plate 5.

[0181] It should be noted that, for this utility model, the insert box fixing block 4027, the insert box tail limiting block 4029, and the hoisting angle iron 4028 are placed between the flange face 408 of the profile base plate 401 and the box cover fixing barrier 4023, and are fixed by brazing after being positioned by the cold plate strengthening fixing hole 407 on the flange face 408.

[0182] It should be noted that multiple cold plate central reinforcement fixing holes 4012 are opened on the cold plate cavity 409 of the profile base plate 401; multiple cold plate reinforcement fixing holes 407 are opened on the flange face 408 of the profile base plate 401; reinforcement beam fixing holes 4011 are opened on both sides of the bottom reinforcement beam 4010, and multiple reinforcement beam central fixing holes 4034 are opened in the middle; the bottom reinforcement beam 4010 is placed below the liquid-cooled base plate 5; the cold plate central reinforcement fixing holes 4012 and the reinforcement beam central fixing holes 4034 are coaxially corresponding, and the liquid-cooled base plate 5 is fixed to the middle of the bottom reinforcement beam 4010 by rivet screws; the cold plate reinforcement fixing holes 407 and the reinforcement beam fixing holes 4011 are coaxially corresponding and correspond to the already positioned lifting angle iron 4028, and the two sides of the bottom reinforcement beam 4010 are locked and fixed to the flange face 408 and the lifting angle iron 4028 of the liquid-cooled base plate 5 by bolts.

[0183] For specific implementation details, see [link / reference] Figure 14 The tail limit block 4029 of the insertion box is provided with a fixing threaded hole 4032 for the tail of the insertion box;

[0184] The tail limit block 4029 of the insert box has an inwardly bent portion;

[0185] It should be noted that when the plug box (i.e. the battery box structure of this utility model) is installed inside a cabinet, it can be fixed by the screw holes 4032 at the tail of the plug box on both sides. When the operating space is limited, the plug box tail can be fixed by the inward bending part of the plug box tail limiting block 4029 cooperating with the original limiting mechanism on the cabinet (e.g., snap-fit).

[0186] In terms of specific implementation, such as Figure 16 , Figure 17 As shown, the bottom of the upper cover 3 is provided with a surrounding flange surface 301;

[0187] The flange face 301 of the box cover overlaps with the box cover fixing barrier 4023 and the box cover fixing beam 4020 installed above the liquid-cooled base plate 5 of the tray 4;

[0188] In specific implementation, the box cover fixing hole 302 on the box cover flange surface 301 is set one-to-one with the second box cover fixing nut 4024 set on the box cover fixing enclosure 4023 above the tray 4 and the box cover fixing nut 4022 set on the box cover fixing beam 4020 above the tray 4; when the sealing component is placed between the tray 4 and the top cover 3, the sealing function can be achieved by fixing with bolts.

[0189] In practice, the top of the upper cover 3 is provided with reinforcing ribs to ensure the strength of the top plane of the upper cover 3;

[0190] In summary, based on the above design, and through the installation and fixing of the aforementioned components, a battery box structure for liquid-cooled and liquid-thermal energy storage can be assembled. The length of the battery box (i.e., the battery box structure of this invention) can be adjusted according to the required number of battery cells. The internal flow channel design enables uniform heat dissipation and heating of the battery cells. This invention features a smaller energy storage box, solves the flow channel defects of profile liquid-cooled boxes, and offers better size matching and superior performance compared to existing integrated cabinets or containerized energy storage systems.

[0191] Based on the battery housing structure provided by the present invention, the present invention also provides an energy storage battery system, which includes the battery housing structure as described above.

[0192] To better understand the technical solution of this utility model, the working principle of this utility model is explained below.

[0193] First, the coolant flows into the inlet chamber 8 through the hollow structure of the inlet nozzle 4016, passing through the first layer of partitions on the upper part of the distribution module 6. The inlet chamber 8 is a closed downward cavity formed by the two front and rear partitions of the distribution module 6 and the two liquid accumulation chamber block blocks 7 on the left and right sides, which is equivalent to a "reservoir".

[0194] Then, the liquid enters the two first flow channel cavities 4041 for liquid inlet in the profile base plate 401 through the liquid inlet 405 located at the bottom of the inner side of the liquid inlet cavity 8, and then flows into the two second flow channel cavities 4042 for liquid outlet through the two first flow channel cavities 4041 for liquid inlet and the second flow channel cavities 4042 for liquid outlet.

[0195] Then, it flows outward into the outlet chamber 9 through the two second flow channel chambers 4042 and the two outlet ports 406;

[0196] Then, it flows outward through the hollow structure of the outlet water nozzle 4017 (for example, to the inlet of the external cooling pump).

[0197] It should be noted that the profile base plate 401 has four front-to-back through flow channel cavities and two front-to-back through cold plate cavities 409 in the middle. The width of the four flow channel cavities and two cold plate cavities 409 is exactly the same as the width of the current energy storage cell.

[0198] It should be noted that the upper front surface of the profile base plate 401 has two liquid outlets 406 and two liquid inlets 405; the liquid outlets 406 correspond to the two middle flow channels (i.e., the second flow channel 4042 for liquid outlet), and the liquid inlets 405 correspond to the two outer flow channels (i.e., the two first flow channel 4041 for liquid inlet); the two liquid inlets 405 are in a straight line, and the two liquid outlets 406 are in a straight line, with the liquid outlets 406 closer to the front of the profile base plate 401; the front of the profile base plate 401 is sealed with four front plugs 403; the rear of the profile base plate 401 is sealed with two rear plugs 402; the four profile base plates 401 are placed in a tooling and welded into one piece, wherein the flange faces 408 of the two middle profile base plates 401 need to be machined in advance. After cutting and assembly, the eight liquid outlets 406 are in a straight line, and the eight liquid inlets 405 are in a straight line. At this time, the partition plate at the lower front of the liquid distribution module 6 can separate the liquid inlets 405 and the liquid outlets 406 into two parts. The coolant flows from the liquid inlet chamber 8 through the eight liquid inlets 405 into the two first flow channel chambers 4041 for liquid inlet. Since the front part has been blocked in advance by the front block 403, it can only flow backward. When it passes the tail of the profile bottom plate 401, it is blocked in advance by the rear block 402, and the fluid is turned and flows forward by the machined flow channel isolation support reinforcement rib 4014, so that it flows forward into the second flow channel chamber 4042 for liquid outlet. Finally, it flows into the liquid outlet chamber 9 through the eight liquid outlets 406, and then flows outward through the hollow structure of the liquid outlet nozzle 4017.

[0199] It should be noted that, for this utility model, since the liquid outlet nozzle 4017 penetrates the two upper partitions of the liquid distribution module 6, and the liquid distribution module 6 and the liquid outlet nozzle 4017 are pre-sealed by laser welding on the upper and lower sides, the liquid can flow out normally and will not mix with the liquid in the liquid inlet chamber 8.

[0200] When the coolant flows in the flow channel cavity, the heat of the battery cell placed on top of the profile base plate 401 will be transferred to the profile base plate 401 through the thermal conductive gel, and then transferred to the coolant in the flow channel cavity.

[0201] It should be noted that, due to the design concept of the liquid accumulation chamber, the longitudinally arranged single row of cells effectively has two flow channels for heat exchange, greatly improving the conversion efficiency. Furthermore, multiple arc-shaped fins 4013 are located on the upper side of the four flow channel cavities and the cold plate cavity 409 (i.e., the side closest to the individual cell), which helps increase the heat dissipation area. Therefore, the battery box structure of this invention can reliably dissipate heat and heat multiple batteries (i.e., individual cells) within the box, ensuring effective heat dissipation and temperature uniformity. This improves the temperature consistency of the batteries within the box, thereby enhancing the performance of the energy storage battery system.

[0202] It should be noted that, for this utility model, a cover fixing beam 4020 is welded to the upper part of the liquid distribution module 6. The cover fixing beam 4020 is on the same straight line as the liquid inlet nozzle 4016 and the liquid outlet nozzle 4017, and the two sides are made to avoid the gap. The front of the cover fixing enclosure 4023 has an inward contraction and successfully forms a plane with the cover fixing beam 4020 to be fixed to the upper cover 3. This solves the problem that the inlet and outlet of the cold plate profile must exceed the installation plane in the existing battery box structure, reduces the overall length of the battery box, and improves the adaptability of the product.

[0203] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A battery case structure characterized by comprising: Including horizontally distributed trays (4); The top of the tray (4) is provided with a hollow cover (3) with an open bottom; The front panel of the top cover (3) is provided with a first panel (1) and a second panel (2) for sealing. The tray (4) includes a liquid-cooled base plate (5); The liquid-cooled base plate (5) includes multiple parallel profile base plates (401); Any two adjacent profile base plates (401) are fixedly connected on opposite sides; The top of each profile base plate (401) is used to place multiple individual battery cells; Each profile base plate (401) is provided with a first flow channel cavity (4041) for liquid inlet and a second flow channel cavity (4042) for liquid outlet, as well as a liquid inlet (405) and a liquid outlet (406); The first flow channel cavity (4041) and the second flow channel cavity (4042) are connected; The liquid inlet (405) is connected to the first flow channel cavity (4041); The liquid outlet (406) is connected to the second flow channel cavity (4042); A liquid distribution module (6) is provided at the top front end of the liquid-cooled base plate (5); The liquid separation module (6) includes a hollow inlet chamber (8) and an outlet chamber (9) that are separated from each other; The liquid inlet (405) is connected to the liquid inlet chamber (8); The liquid outlet (406) is connected to the liquid outlet chamber (9); The liquid separation module (6) is provided with an inlet water nozzle (4016) and an outlet water nozzle (4017) at its left and right ends respectively; The liquid inlet nozzle (4016) is connected to the liquid inlet chamber (8); The liquid outlet nozzle (4017) is connected to the liquid outlet chamber (9).

2. The battery case structure according to claim 1, wherein Thermal conductive gel is applied between the bottom of the single battery cell placed on top of the profile base plate (401) and the top surface of the profile base plate (401). Any two adjacent profile base plates (401) are fixed on opposite sides by laser welding.

3. The battery case structure according to claim 1, wherein The first panel (1) and the second panel (2) are respectively fixed to the front panel of the upper cover (3) by multiple first bolts and multiple second bolts; The first panel (1) is installed on the inside of the front panel of the upper cover (3); The first panel (1) has multiple threaded fixing holes arranged around its four edges; The front panel of the top cover (3) is provided with a first through hole in the front panel at a position corresponding to each first panel thread fixing hole; The first bolt passes through the first through hole and the first threaded fixing hole of the front panel in sequence, and is threadedly fixed to the first threaded fixing hole of the front panel. A first sealing ring is provided between the four edges of the first panel (1) and the inner side of the front panel of the top cover (3); The second panel (2) is installed on the outside of the front panel of the top cover (3); The second panel (2) has multiple through holes arranged around its four edges; The front panel of the top cover (3) is provided with a front panel second thread fixing hole at a position corresponding to each second panel through hole; The second bolt passes through the corresponding second panel through hole and the front panel second threaded fixing hole in sequence, and is threadedly fixed to the front panel second threaded fixing hole; A second sealing ring is provided between the four edges of the second panel (2) and the outer side of the front panel of the top cover (3).

4. The battery case structure according to claim 1, wherein The bottom of the top cover (3) is surrounded by a cover flange surface (301); On the flange face (301) of the box cover, there are multiple box cover fixing holes (302) spaced apart; On the left and right sides of the cover flange face (301), there are vertically upward cover flange face reinforcement plates (303); Vertically downward reinforcing plates (303) are provided on both the front and rear sides of the cover flange face (301); A sealing strip is provided between the bottom of the cover flange face (301) and the tray (4).

5. The battery case structure according to any one of claims 1 to 4, wherein Each profile base plate (401) includes four flow channel cavities; The four flow channel cavities include: two first flow channel cavities (4041) and two second flow channel cavities (4042); Each profile base plate (401) has two longitudinally distributed first flow channel cavities (4041) on the inner side of its middle section; Each of the two first flow channel cavities (4041) has a second flow channel cavity (4042) on its opposite side; Each profile base plate (401) has a cold plate cavity (409) at both its left and right ends.

6. The battery housing structure as described in claim 5, characterized in that, At the front end of the upper panel of each profile base plate (401), two liquid outlets (406) are vertically provided. These two liquid outlets (406) are correspondingly provided at the middle of the front end of the second flow channel cavity (4042) for liquid discharge, and are connected to the second flow channel cavity (4042). At the front end of the upper panel of each profile base plate (401), two liquid inlets (405) are vertically provided. These liquid inlets (405) are corresponding to the middle of the front end of the first flow channel cavity (4041) for liquid inlet and are connected to the first flow channel cavity (4041). For each profile base plate (401), each first flow channel cavity (4041) for liquid inlet is connected to the adjacent second flow channel cavity (4042) for liquid outlet.

7. The battery case structure according to claim 6, wherein Each flow channel cavity has flow channel isolation support reinforcing ribs (4014) on both the left and right sides; For each profile base plate (401), the rear end of each first flow channel cavity (4041) for liquid inlet is connected to the rear end of the adjacent second flow channel cavity (4042) for liquid outlet through a liquid passage. Specifically, the liquid passage is a notch provided on the flow channel isolation support reinforcement rib (4014) between the first flow channel cavity (4041) for liquid inlet and the adjacent second flow channel cavity (4042) for liquid outlet; And / or, The center points of the two liquid inlets (405) are located on the same straight line; The center points of the two liquid outlets (406) are located on the same straight line; The center points of the inlet (405) and the outlet (406) are not on the same straight line; The liquid outlet (406) is closer to the front end face of the profile base plate (401) than the liquid inlet (405); And / or, The profile base plate (401) has four flow channel cavities, each of which is sealed with a front plug (403) at the front end; The profile base plate (401) has four flow channel cavities with two rear plugs (402) for sealing the rear end; And / or, Multiple arc-shaped fins (4013) are provided on the side of the four flow channel cavities and the cold plate cavity (409) near the individual cell. And / or, The profile base plate (401) has a flange face (408) on each of its left and right sides; And / or, Three horizontally distributed bottom reinforcing beams (4010) are fixedly connected to the bottom of the liquid-cooled base plate (5); Each bottom reinforcing beam (4010) has a pair of reinforcing beam fixing holes (4011) at its left and right ends; The liquid-cooled base plate (5) is provided with a pair of cold plate reinforcement fixing holes (407) at the positions corresponding to each pair of strong beam fixing holes (4011); The reinforcing beam fixing hole (4011) and the cold plate reinforcing fixing hole (407) are fixed by riveting; Each bottom reinforcing beam (4010) has a central fixing hole (4034) in the middle; The cold plate cavity (409) of the profile base plate (401) has a cold plate middle reinforcement fixing hole (4012); The fixing holes (4034) in the middle of the reinforcing beam are correspondingly set with the fixing holes (4012) in the middle of the cold plate, and are fixed by riveting.

8. The battery case structure according to any one of claims 1 to 7, wherein The top of the liquid separation module (6) is also fixedly provided with a box cover fixing beam (4020); Multiple box cover fixing nuts (4022) are riveted above the box cover fixing beam (4020); Both ends of the box cover fixing beam (4020) are connected to the box cover fixing enclosure (4023); The box cover fixing baffle (4023) is fixed to the four edges of the liquid-cooled base plate (5) by laser welding; At the front and rear ends of the top of the liquid-cooled base plate (5), there is a horizontally distributed module mounting beam (4019); The upper surface of the box cover fixing fence (4023) and the upper surface of the box cover fixing beam (4020) are on the same plane.

9. The battery case structure according to claim 8, wherein A box fixing block (4027) is provided between the front ends of the left and right sides of the box cover fixing barrier (4023) and the front ends of the left and right sides of the liquid cooling base plate (5); Each insert box fixing block (4027) is provided with two insert box fixing threaded holes (4031); Between the left and right rear ends of the box cover fixing baffle (4023) and the left and right rear ends of the liquid cooling base plate (5), a box tail limiting block (4029) is respectively set; Multiple hoisting angle irons (4028) are fixedly installed between the insertion box fixing block (4027) and the insertion box tail limiting block (4029) on the same side; Angle iron fixing holes (4030) are provided on the hoisting angle iron (4028); The holes of the angle iron fixing hole (4030), the cold plate reinforcement fixing hole (407) on the flange face (408) of the profile base plate (401), and the reinforcement beam fixing hole (4011) on the bottom reinforcement beam (4010) at the bottom of the liquid-cooled base plate (5) are set in a positive correspondence.

10. An energy storage battery system, characterized by, Includes the battery housing structure as described in any one of claims 1 to 9.

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