CN219226483U - Double-shell heat dissipation battery box - Google Patents

Abstract

The utility model belongs to the technical field of energy storage battery boxes, and discloses a double-shell heat dissipation battery box, which comprises a box upper cover (1), a box bottom plate (31), a box front plate (6), a box rear plate (24), a box side plate (2) and an inner cavity shell (33); the box upper cover (1), the box bottom plate (31), the box front plate (6), the box rear plate (24) and the box side plates (2) are connected into a cuboid box body through fasteners (32); the inner cavity shell (33) is in a groove shape and is provided with a heat dissipation hole, and the side plates and the front and rear ends of the inner cavity shell are connected with the box side plate (2), the box front plate (6) and the box rear plate (24) through fastening bolts. The battery box provided by the utility model adopts a waterproof structure design, the sealing performance is good, the working scene is widely applicable, and meanwhile, the heat-conducting glue is covered between the battery module and the shell, so that the temperature consistency of the internal battery cell group is better, the buffer performance is realized, and the service life of the battery cell is prolonged.

Description

Double-shell heat dissipation battery box

Technical Field

The utility model belongs to the technical field of energy storage battery boxes, and particularly relates to a double-shell heat dissipation battery box with heat dissipation and heat preservation effects.

Background

With the increasing demands of power systems on regulation capability and the increasing development and consumption of new energy, demands of high-power transportation scenes are also increasing, such as laser anti-unmanned aerial vehicle systems, electric mine cards and other fields, which are required to provide higher power density for energy storage systems so as to adapt to more compact installation space. The higher the operating power, the greater the heating of the energy storage battery system itself. Temperature is a key factor for restricting the performance of the lithium battery, and high temperature has double effects on the power battery. On the one hand, as the temperature rises, the activity of the electrolyte is improved, the ion diffusion speed is increased, the internal resistance of the battery is reduced, and the performance of the battery is improved. On the other hand, the higher temperature can cause the electrode degradation, electrolyte decomposition and other harmful reactions to occur, which affects the service life of the battery and even causes permanent damage to the internal structure of the battery. Studies show that the chemical reaction rate and the temperature are in polar number relationship, and the chemical reaction rate is doubled every 10 ℃ in temperature increase. The cycle times of the lithium battery cell are reduced by about 60% when operated at an ambient temperature of +45℃. At high rate charging, the temperature increases by 5 ℃, and the battery life decreases severely. In contrast, in a low-temperature environment, the electrolyte has low activity, the ion diffusion speed is low, the internal resistance of the battery is greatly increased, the discharge capacity is obviously reduced, the pressure rise in the charging period is fast, and the use safety of the battery is affected. The battery system often also accompanies the unbalanced problem of internal calorific value when working, because the internal resistances of the battery body, the battery tab and the connecting current collector among the batteries are all different, the calorific value is different particularly obviously when working at high power, and the service life of the battery energy storage system is reduced. In summary, a suitable operating temperature is a precondition for good performance of the battery.

The existing battery shell is of a single-layer structure, the tightness and the heat dissipation effect of the existing battery shell can influence the service life of a battery, so that an effective heat dissipation battery box structure is developed, the internal temperature of the battery box can be controlled stably and efficiently, meanwhile, the production cost can be greatly reduced under the existing heat dissipation method, and a good heat dissipation battery box structure form has important significance for improving the overall performance of an internal battery pack.

Disclosure of Invention

The utility model aims to provide a double-shell heat dissipation battery box capable of stably and efficiently controlling the internal temperature of the battery box, so as to solve the technical problem that the tightness and the heat dissipation effect of the existing battery box can influence the service life of a battery.

In order to achieve the above purpose, the specific technical scheme of the double-shell heat dissipation battery box is as follows:

the double-shell heat dissipation battery box comprises a box upper cover 1, a box bottom plate 31, a box front plate 6, a box rear plate 24, a box side plate 2 and an inner cavity shell 33; the box upper cover 1, the box bottom plate 31, the box front plate 6, the box rear plate 24 and the box side plate 2 are connected into a cuboid box through fasteners 32; the inner cavity shell 33 is in a groove shape and is provided with a heat radiation hole, and the side plates and the front and rear ends of the inner cavity shell are connected with the box side plate 2, the box front plate 6 and the box rear plate 24 through fastening bolts; the bottom plate 31 of the box body is connected with the bottom plate of the inner cavity shell 33 through an air channel division bar formed by three longitudinal and transverse reinforcing ribs and a fastening bolt to form a double-shell structure; the double-shell interlayer and the reinforcing ribs form air channels in each area for separating, draining and guiding; the joints of the shells are provided with waterproof glue grooves 34.

Wherein, the outer surface passivation treatment of the box body is electroplated and three-proofing spraying treatment is carried out.

The battery standard module 19, the high-voltage control module 29 and the data acquisition management module 27 are fixedly arranged in the inner cavity shell 33.

The front box body plate 6 is provided with a positive connector 21, a negative connector 15, a first communication connector 7, a second communication connector 8, a first heating management connector 12, a second heating management connector 13, an MSD11, a grounding column 23, a heating switch 9, a pressure release valve 10, a nameplate 14, a fixed angle 3, a handle 4 and a line card bracket 47; the fixed angle 3 is fixedly connected with the battery frame beam through a bolt; the line card bracket 47 is used for fixing wires of the high-voltage control module 29 and the data acquisition management module 27.

Wherein, the first wear strip 22 and the second wear strip 30 are respectively fixed on the side plate 2 and the bottom plate 31.

Wherein, the battery standard module 19 comprises a module front baffle 35, a module rear baffle 36, a module side baffle 37, a module upper cover 38, a module shoulder pad 43, a conductive aluminum row 39 and a battery unit 40; the battery standard modules 19 are connected in series through a connecting copper bar 28; the front baffle 35 and the rear baffle 36 are L-shaped angle steel, the horizontal plane of the bottom of the angle steel is provided with a horizontal adjusting hole 46, a bolt penetrates through the horizontal adjusting hole 46, and the battery standard module 19 is fixed on the bottom plate 31 of the box body; the front module baffle 35, the rear module baffle 36 and the two side module baffles 37 form an outer aluminum alloy cuboid frame structure, 27 battery units 40 are arranged in the cuboid frame structure through bolt fastening, and a plastic module shoulder pad 43 is also fixed between the battery units 40 and the side module baffles 37; the top and bottom of the module side baffle 37 are respectively fixed with a plastic module baffle 45; the conductive aluminum bars 39 are fixed to the module spacers 45.

Wherein, the module front baffle 35, the module rear baffle 36, the two module side baffles 37 and the module upper cover 38 are all provided with air inlet holes which are in butt joint with the air duct.

Wherein the module upper cover 38 is mounted with a fan 17.

The fan 17 is fixed on the module upper cover 38 of the battery standard module 19 and the case side plate 2 of the battery case through the fan mounting bracket 18 and the air duct guide bracket 16.

Wherein, the two sides of the inner cavity shell 33 are respectively stuck with the heat insulation composite board 20 and are connected with the box body through bolts.

The double-shell heat dissipation battery box has the following advantages:

1. the battery box adopts a waterproof structure design, the sealing performance is good, the working scene is widely applicable, and meanwhile, the heat-conducting glue is covered between the battery module and the shell, so that the temperature consistency of the internal battery cell group is good, the buffer performance is provided, and the service life of the battery cell is prolonged;

2. the whole box body is made of aluminum alloy, so that the weight is light, the strength is good, and the mass production is easy to realize by high-precision production and processing;

3. a cooling fan is arranged in the box body, and the air circulation is formed in the inner space by guiding the flow through the designed inner wall air channel, so that the heat of different heating points in the box body is uniformly distributed;

4. the anode and the cathode of the battery cell are connected with the conductive aluminum bar through laser welding, so that the internal resistance is small, the heating is less, and the strength is high;

5. each standard battery module is provided with a voltage/temperature acquisition point, is connected with a data acquisition management part through contact acquisition data, collects management data, reflects the current working state of the module at any time, improves safety, does not need to carry out complex line laying, reduces open wires, simplifies assembly, has high acquisition precision, and has a neat internal structure;

6. the whole battery module has compact structure, high energy density, convenient production and assembly and greatly reduced working time cost and maintenance cost;

7. the whole battery box supports high-current charge/discharge, which can reach 200A/10C at most.

Drawings

FIG. 1 is a schematic diagram of a dual-case heat-dissipating battery case of the present utility model;

FIG. 2 is a schematic diagram of the internal structure of a dual-case heat-dissipating battery case according to the present utility model;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic diagram of the bottom structure of a dual-case heat-dissipating battery case;

FIG. 5 is a schematic view of the face structure of FIG. 1;

fig. 6 is a schematic structural view of a battery standard module.

Detailed Description

For a better understanding of the objects, structures and functions of the present utility model, a dual-housing heat dissipating battery box of the present utility model will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 6, the double-shell heat dissipation battery box of the utility model comprises a box upper cover 1, a box bottom plate 31, a box front plate 6, a box rear plate 24, a box side plate 2, an inner cavity shell 33, a battery standard module 19, a high-voltage control module 29 and a data acquisition management module 27;

the box upper cover 1, the box bottom plate 31, the box front plate 6, the box rear plate 24 and the box side plate 2 are connected into a cuboid box through fasteners 32; the inner cavity shell 33 is in a groove shape and is provided with a heat radiation hole, and the side plates and the front and rear ends of the inner cavity shell are connected with the box side plate 2, the box front plate 6 and the box rear plate 24 through fastening bolts; the bottom plate 31 of the box body is connected with the bottom plate of the inner cavity shell 33 through an air channel division bar formed by three longitudinal and transverse reinforcing ribs and a fastening bolt to form a double-shell structure; the double-shell interlayer and the reinforcing ribs form air channels in each area for separating, draining and guiding; the joint of the shell is provided with a waterproof glue groove 34, and the tightness and the waterproof property of the box body are ensured by gluing; the outer surface of the box body is subjected to passivation treatment and electroplating and three-proofing spraying treatment, so that the overall strength, mildew resistance and salt mist resistance are ensured.

The box front plate 6 is provided with a positive connector 21, a negative connector 15, a first communication connector 7, a second communication connector 8, a first heating management connector 12, a second heating management connector 13, an MSD11, a grounding column 23, a heating switch 9, a pressure release valve 10, a nameplate 14, a fixed angle 3, a handle 4 and a line card bracket 47; the fixed angle 3 is fixedly connected with the battery frame beam through a bolt; the line card bracket 47 is used for fixing wires of the high-voltage control module 29 and the data acquisition management module 27.

The first wear-resistant strip 22 and the second wear-resistant strip 30 are respectively arranged on the box side plate 2 and the box bottom plate 31 through countersunk bolts, so that surface coating damage caused by friction in the installation process is prevented; the handle 4 and the limiting block 5 are arranged on the rear plate 24 of the box body.

The battery standard module 19 is fixed inside the inner cavity shell 33, and comprises a module front baffle 35, a module rear baffle 36, a module side baffle 37, a module upper cover 38, a module shoulder pad 43, a conductive aluminum row 39 and a battery unit 40; the battery standard module 19 is placed in a battery box body and connected in series through a connecting copper bar 28; the module front baffle 35 and the module rear baffle 36 are L-shaped angle steel, the horizontal plane of the bottom of the module front baffle is provided with a horizontal adjusting hole 46, and bolts penetrate through the horizontal adjusting hole 46 and fix the battery standard module 19 on the box bottom plate 31.

The front module baffle 35, the rear module baffle 36 and the two side module baffles 37 form an outer aluminum alloy cuboid frame structure, 27 battery units 40 are arranged in the cuboid frame structure through bolt fastening, and a plastic module shoulder pad 43 is also fixed between the battery units 40 and the side module baffles 37; the top and bottom of the module side baffle 37 are respectively fixed with a plastic module baffle 45; the conductive aluminum bars 39 are fixed to the module spacers 45.

The battery standard module 19 further comprises a polar conductive aluminum row 44 which is fixed at the top and the bottom of the rectangular frame structure and provided with conductive jacks; the pole fixing piece 42 is fixed to the polar conductive aluminum row 44 through a conductive insertion hole. The conductive aluminum bars 39 are connected in series with the cell poles and formed by laser welding, and are provided with temperature collection points 41.

The module front baffle 35, the module rear baffle 36, the two module side baffles 37 and the module upper cover 38 are all provided with air inlets which are in butt joint with the air duct. The module upper cover 38 is mounted with the fan 17.

The fan 17 is simultaneously fixed on the module upper cover 38 of the battery standard module 19 and the box side plate 2 of the battery box through the fan mounting bracket 18 and the air duct flow guide bracket 16.

The two sides of the inner cavity shell 33 are respectively stuck with heat insulation composite plates 20 and are connected with the box body through bolts; a desiccant mounting box 25 and a current sensor 26 are also installed in the box.

The battery units 40 are adhered with heating films on the back surfaces of the two sides of the aluminum shell in a serial connection mode, and heat can be efficiently and controllably transferred into the battery cells through the aluminum shell during heating, and air channels are reserved among the battery units 40 for heat dissipation of the battery cells;

the battery unit 40 is heated to the lower temperature limit that the battery core can work normally by adopting a PI film heating mode, so that the normal work of the battery in a low-temperature environment is ensured.

The double-shell radiating battery box adopts an air cooling radiating mode, the box body adopts a double-shell structural design, a fan 17 and a heat insulation material are arranged in the box body, and meanwhile, the double-shell radiating battery box has the double functions of radiating and preserving heat.

The high-voltage control module 29 and the data acquisition management module 27 are provided for each battery standard module 19 to be connected with the data acquisition management part through the contact acquisition data, collect management data, reflect the working state of the current module at any time, improve the safety, simultaneously, do not need to carry out complex line laying, reduce open wires, simplify assembly, have high acquisition precision and have clean internal structures of the battery modules.

Description of heat dissipation principle: the battery generates heat with different temperatures at the joint of the body and the lug through charge and discharge, is limited by space limitation in all aspects, and a plurality of different temperature areas exist in the battery box; when the temperature of the temperature detection point in the battery standard module 19 is higher than the starting threshold value of the heat radiation system, the heat radiation function of the system is started through the BMS, and the fan 17 starts to operate; the fan 17 is positioned at the top of the battery standard module 19, sucks out the heat of the internal gaps of each module to the top of the battery box through strong vortex pressure, then introduces the heat into the double-shell interlayer through the designed air duct guide groove, flows into the bottom, finally blows the heat to the battery standard module 19 through the air hole of the bottom plate, completes the internal circulation of the air in the battery box, and ensures that the air with different temperature areas flows along the air duct direction to realize the thermal circulation and the thermal balance. The hot air flows in the air channel formed by the interlayer and the reinforcing ribs, fully contacts with the outer wall of the shell in a large area and transfers heat. The heat insulation composite board 20 can block heat, effectively prevent hot air from transmitting part of heat back to the battery standard module 19 through the inner wall of the shell, and reduce the heat transfer effect; meanwhile, the heat-conducting glue is covered between the battery standard module 19 and the shell, so that the temperature consistency of the internal battery cell group is good, the battery cell group has buffering performance, and the service life of the battery cell is prolonged. The circulation makes the inside of the battery box have an intuitive cooling effect, so that the box body has good heat dissipation and heat preservation effects.

Compared with the prior art, the embodiment has the following main beneficial effects:

1. the battery box adopts a waterproof structure design, the sealing performance is good, the working scene is widely applicable, and meanwhile, the heat-conducting glue is covered between the battery module and the shell, so that the temperature consistency of the internal battery cell group is good, the buffer performance is provided, and the service life of the battery cell is prolonged;

2. the whole box body is made of aluminum alloy, so that the weight is light, the strength is good, and the mass production is easy to realize by high-precision production and processing;

3. a cooling fan is arranged in the box body, and the air circulation is formed in the inner space by guiding the flow through the designed inner wall air channel, so that the heat of different heating points in the box body is uniformly distributed;

4. the anode and the cathode of the battery cell are connected with the conductive aluminum bar through laser welding, so that the internal resistance is small, the heating is less, and the strength is high;

5. each standard battery module is provided with a voltage/temperature acquisition point, is connected with a data acquisition management part through contact acquisition data, collects management data, reflects the current working state of the module at any time, improves safety, does not need to carry out complex line laying, reduces open wires, simplifies assembly, has high acquisition precision, and has a neat internal structure;

6. the whole battery module has compact structure, high energy density, convenient production and assembly and greatly reduced working time cost and maintenance cost;

7. the whole battery box supports high-current charge/discharge, which can reach 200A/10C at most.

Although embodiments of the present utility model have been described in conjunction with the accompanying drawings, it will be apparent to those skilled in the art that several variations and modifications may be made without departing from the principles of the utility model, which are also considered to be within the scope of the utility model.

Claims (10)

1. The double-shell heat dissipation battery box is characterized by comprising a box upper cover (1), a box bottom plate (31), a box front plate (6), a box rear plate (24), a box side plate (2) and an inner cavity shell (33); the box upper cover (1), the box bottom plate (31), the box front plate (6), the box rear plate (24) and the box side plates (2) are connected into a cuboid box body through fasteners (32); the inner cavity shell (33) is in a groove shape and is provided with a heat radiation hole, and the side plates and the front and rear ends of the inner cavity shell are connected with the box side plate (2), the box front plate (6) and the box rear plate (24) through fastening bolts; the box bottom plate (31) is connected with the bottom plate of the inner cavity shell (33) through an air channel division bar and fastening bolts which are formed by three longitudinal and transverse reinforcing ribs to form a double-shell structure; the double-shell interlayer and the reinforcing ribs form air channels for separating, draining and guiding the flow in each area.

2. The dual-case heat-dissipating battery case of claim 1, wherein the case outer surface passivation is electroplated and subjected to a tri-proof spray treatment.

3. The double-shell radiating battery box according to claim 1, wherein a battery standard module (19), a high-voltage control module (29) and a data acquisition management module (27) are fixedly arranged inside the inner cavity shell (33).

4. A double-shell heat-dissipating battery box according to claim 3, characterized in that the box front plate (6) is mounted with a positive connector (21), a negative connector (15), a first communication connector (7), a second communication connector (8), a first heating management connector (12), a second heating management connector (13), an MSD (11), a grounding post (23), a heating switch (9), a pressure relief valve (10), a nameplate (14), a fixing angle (3), a handle (4), a line card bracket (47); the fixed angle (3) is fixedly connected with the battery rack beam through a bolt; the line card bracket (47) is used for fixing wires of the high-voltage control module (29) and the data acquisition management module (27).

5. The double-case heat-dissipating battery case according to claim 1, wherein the case side plate (2) and the case bottom plate (31) are fixedly provided with a first wear strip (22) and a second wear strip (30), respectively.

6. The dual-case heat-dissipating battery case of claim 4, wherein the battery standard module (19) comprises a module front baffle (35), a module rear baffle (36), a module side baffle (37), a module upper cover (38), a module shoulder pad (43), a conductive aluminum row (39), and battery cells (40); a plurality of battery standard modules (19) are connected in series through connecting copper bars (28); the front baffle (35) and the rear baffle (36) of the module are L-shaped angle steel, a horizontal adjusting hole (46) is formed in the horizontal plane of the bottom of the front baffle and the horizontal adjusting hole (46), a bolt penetrates through the horizontal adjusting hole (46), and the battery standard module (19) is fixed on the bottom plate (31) of the box body; the module front baffle (35), the module rear baffle (36) and the two module side baffles (37) form an outer aluminum alloy cuboid frame structure, 27 battery units (40) are arranged in the cuboid frame structure through bolt fastening, and a plastic module shoulder pad (43) is also fixed between each battery unit (40) and each module side baffle (37); the top and the bottom of the module side baffle plates (37) are respectively fixed with a plastic module baffle plate (45); the conductive aluminum row (39) is fixed on the module separator (45).

7. The dual-case heat-dissipating battery case according to claim 6, wherein the module front baffle (35), the module rear baffle (36), the two module side baffles (37) and the module upper cover (38) are all provided with air inlet holes which are butted with the air duct.

8. The double-case heat-dissipating battery case according to claim 7, wherein the module upper cover (38) is mounted with a fan (17).

9. The double-housing heat-dissipating battery case according to claim 8, wherein the fan (17) is simultaneously fixed to the module upper cover (38) of the battery standard module (19) and the case side plate (2) of the battery case through the fan mounting bracket (18) and the air duct guide bracket (16).

10. The double-shell heat-dissipating battery case according to claim 8, wherein the heat-insulating composite board (20) is attached to both sides of the inner-shell (33) and connected to the case by bolts.

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