Liquid-cooled battery box

Abstract

The utility model provides a liquid-cooled battery box. The liquid-cooled battery box comprises a lower box body; the liquid cooling plate is mounted on the lower box body; the battery module is positioned in the lower box body and above the liquid cooling plate; a plurality of positioning holes are formed in the liquid cooling plate, a plurality of mounting columns are arranged on the lower box body, and the positioning holes can be inserted into the mounting columns. According to the liquid-cooled battery box, the temperature and the temperature difference of the battery can be effectively controlled through the built-in liquid-cooled system, so that the battery stably and reliably operates in a proper environment, the overall cooling effect of the battery box is good, the temperature rise in the battery module is low, the cycle life of a battery cell is prolonged, and the service life of the battery cell is prolonged. Therefore, the battery box can accommodate a battery cell with higher capacity, and more lasting endurance power is provided for the ship.

Description

Technical Field

[0001] The present application relates to the technical field of lithium-ion batteries, and in particular to a liquid-cooled battery box. Background Art

[0002] For a long time, marine energy storage devices have been mainly lead-acid batteries, which are mainly used as engine starting power, lighting and emergency backup power, and are rarely used as the main power source of ships. In the civil ship market, internal combustion engines (mainly diesel engines) account for more than 95% of the market share. With the innovation of ship propulsion technology, electric propulsion technology has gradually been promoted and applied on ships, and the development of energy storage technology, mainly the progress of various power battery technologies, has directly promoted the research and development and construction of all-battery and hybrid ships. Since power lithium batteries as ship propulsion power sources are still in their infancy, it is necessary to sort out and study the characteristics and application technology development of power lithium batteries, and combine the characteristics of ship power system analysis to provide reference for the research and development of new energy ships.

[0003] Currently, small ship power batteries on the market generally use heating films for heating and natural cooling for heat dissipation, which cannot effectively solve the problem of heat generation when the battery cells are working. Utility Model Content

[0004] In order to solve the technical problem of poor cooling and heat dissipation effect in the battery box in the prior art, the utility model provides a liquid-cooled battery box, comprising: a lower box body; a liquid cooling plate, the liquid cooling plate is installed on the lower box body; a battery module, located in the lower box body and above the liquid cooling plate; a plurality of positioning holes are provided on the liquid cooling plate, and a plurality of mounting columns are provided on the lower box body, and the positioning holes can be inserted into the mounting columns.

[0005] Furthermore, the positioning holes are arranged at four corners of the liquid cooling plate.

[0006] Furthermore, the main body of the liquid cooling plate does not contact the main body of the lower box.

[0007] Furthermore, foam is included, and the foam is located on the lower surface of the liquid cooling plate and protrudes from the lower surface of the liquid cooling plate.

[0008] Furthermore, a thermally conductive gel is included, and the thermally conductive gel is located on the upper surface of the liquid cooling plate and below the battery module and in contact with the battery module.

[0009] Furthermore, it also includes an aerosol fire extinguisher located in the lower box.

[0010] Furthermore, a positive connector, a negative connector, a battery box input nozzle and a battery box output nozzle are also arranged on a side surface of the lower box body.

[0011] Furthermore, a communication plug-in and a pressure relief valve are also provided on the side surface of the lower box body.

[0012] Furthermore, an insulating sheet is provided on the liquid cooling plate, and the thermal conductive gel is located on the insulating sheet.

[0013] Furthermore, a cooling liquid inlet pipe and a cooling liquid outlet pipe are provided on one side of the liquid cooling plate.

[0014] The utility model is a liquid-cooled battery box that can effectively control the temperature and temperature difference of the battery through the built-in liquid cooling system, so that the battery can operate stably and reliably in a suitable environment. The overall cooling effect of the battery box is good, and the temperature rise in the battery module is low, thereby extending the cycle life of the battery cell, so that the battery box can accommodate higher capacity batteries, thereby providing a longer-lasting endurance power for the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the liquid-cooled battery box of the utility model;

[0016] Figure 2 It is a partial exploded schematic diagram of the liquid-cooled battery box of the utility model;

[0017] Figure 3 It is a schematic diagram of a liquid cooling plate of a liquid-cooled battery box of the utility model from a first perspective;

[0018] Figure 4 This is a schematic diagram of a second viewing angle of a liquid cooling plate of a liquid-cooled battery box of the present invention. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0020] The utility model defines the vertical direction as the up-down direction; the direction perpendicular to the up-down direction is defined as the left-right direction, and the liquid cooling plate is arranged parallel to the up-down direction; the third direction perpendicular to the up-down direction and the left-right direction is the front-back direction.

[0021] The liquid-cooled battery box of the utility model includes: a lower box body 10, a liquid cooling plate 12 supported by the lower box body 10, a battery module 13, a thermally conductive gel 11 arranged between the battery module 13 and the liquid cooling plate 12, a CCS assembly 1401 arranged at the upper end of the battery module 13, a module insulating upper cover 15 arranged at the upper end of the CCS, and a box cover 16 covering the module insulating upper cover 15. The box cover 16 can be fixedly connected to the lower box body 10 by fixing parts so that various components in the liquid-cooled battery box are sealed inside the battery box body.

[0022] like Figure 1 As shown, in the lower case 10 of the present invention, a battery box input nozzle 1701 is also provided to input external coolant into the liquid cooling plate 12 in the battery box, and a battery box output nozzle 1702 is configured to discharge the cooled coolant to the outside of the battery box. The lower case 10 of the battery box is also provided with a positive connector 1801 and a negative connector 1802, which are configured to be electrically connected to the positive and negative poles of the battery box to output power or to be connected to the positive and negative poles of an external power source when the battery box needs to be charged to charge the battery module in the battery box. In the present invention, the positive connector 1801 and the negative connector 1802 of the battery box are arranged on the same side of the box. Compared with arranging the positive connector and the negative connector on different sides, the electrical connection of the battery box of the present invention is more convenient and efficient. At the same time, a communication plug-in 14 is also provided on the same side as the positive connector 1801 and the negative connector 1802 to connect and communicate the relevant information of the battery box with the external communication device so as to realize real-time monitoring of the real-time working status of the battery module in the battery box. In order to improve the safety performance of the battery box, the battery box of the utility model is also provided with a pressure relief valve 13, which is configured to be opened when the pressure in the battery box exceeds a predetermined value to release the pressure of the battery box, so as to prevent the battery box from exploding due to overheating and other reasons. In the battery box of the utility model, the positive connector 1801, the negative connector 1802, the battery box input nozzle 1701, the battery box output nozzle 1702, the pressure relief valve 13 and the communication plug-in 14 and other components connected to the external components are all arranged on the same side of the battery box. Such an arrangement can facilitate the user to check whether the connection status of each component in the battery box is normal at one time, can efficiently identify and check the status in the battery box, and when the battery box is abnormal, the problem point can also be quickly identified and repaired quickly.

[0023] The battery box of the present invention is also provided with a slave control component 16 and an aerosol fire extinguisher 1601. When the battery module in the battery box loses control and catches fire, the slave control component 16 can immediately monitor the status of the battery module in real time and start the aerosol fire extinguisher 1601 to extinguish the fire and cool down the battery box, preventing the fire in the battery module in the battery box from further expanding, thereby ensuring the safety of the battery box.

[0024] like Figure 2As shown, the CCS component 1401 of the battery box of the utility model is provided with a module connection row 1402 configured to be connected to the positive and negative poles of the battery module (not shown) and a positive connection row 1403 and a negative connection row 1404. The positive connection row 1403 and the negative connection row 1404 are configured as Z-shaped metal components, one end of which can be connected to the module connection row 1402 by welding, and the other ends of the positive connection row 1403 and the negative connection row 1404 are configured to be electrically connected to the positive connector 1801 and the negative connector 1802 on the lower box 10, so as to realize electrical connection between the positive and negative poles of the battery module 13 and the outside of the battery box, and realize electrical connection and electrical exchange between the battery box and the external power supply.

[0025] The liquid cooling plate 12 in the liquid cooling battery box of the utility model is constructed as follows Figure 3 and 4 The liquid cooling plate 12 inside the battery box of the utility model is roughly rectangular, and four positioning holes 1203 are set at the four corner positions of the rectangle. The corresponding positions on the lower box body 10 of the battery box are provided with positioning posts (not shown). When the liquid cooling plate 12 is installed in the lower box body 10, the positioning holes 1203 are inserted into the positioning posts (not shown) of the lower box body 10 to be positioned. At the same time, one end of the liquid cooling plate 12 is respectively connected with a cooling liquid input pipe 1201 and a cooling liquid outflow pipe 1202, which are configured to input the cooling liquid into the liquid cooling plate and flow out of the liquid cooling plate after cooling the battery module. The cooling liquid input pipe 1201 and the cooling liquid outflow pipe 1202 are preferably constructed of flexible and deformable materials so that they can be deformed in the battery box to facilitate installation. A strip-shaped insulating sheet 1204 is pasted on the upper surface of the liquid cooling plate 12, and the thermal conductive gel 11 is located on the insulating sheet 1204. Because the liquid cooling plate or the lower box may have errors during the production process, resulting in poor flatness, the setting of the insulating sheet 1204 can prevent the battery module from directly contacting the lower box or the liquid cooling plate. A plurality of foams 1206 are installed on the lower surface of the liquid cooling plate 12. The foams 1206 are located at each stamping flow channel of the liquid cooling plate 12. The stamping flow channel is lower than the main body of the liquid cooling plate. After the foams 1206 are installed at the recessed stamping flow channel, the foams 1206 protrude from the bottom of the liquid cooling plate 1206 as a whole. Therefore, when the liquid cooling plate 12 is installed in the lower box 10, the foams 1206 contact the lower box 10 while the liquid cooling plate does not contact the lower box, thereby avoiding the phenomenon of pressure loss caused by the contact between the stamping flow channel of the liquid cooling plate and the box in the prior art.

[0026] The installation process and working principle of the liquid-cooled battery box of the present invention will be briefly described below in conjunction with the accompanying drawings.

[0027] First, the liquid cooling plate 12 is installed in the lower box 10. During the installation process, the installation holes 1203 on the liquid cooling plate 12 are aligned with the positioning columns (not shown) on the lower box to achieve positioning and installation. Then, the thermal conductive gel 11 is installed on the insulating sheet 1204 on the liquid cooling plate 12. Then, the battery module 13 is placed on the liquid cooling plate so that the thermal conductive gel 11 is filled between the battery module 13 and the liquid cooling plate 12. The liquid cooling pipeline outside the battery box inputs the coolant into the coolant input pipe 1201 of the liquid cooling plate through the battery box input nozzle 1701, and enters the various liquid flow channels of the liquid cooling plate 12. The liquid cooling plate 12 contains multiple flow channels. The battery box achieves heat exchange with the battery cells in the battery module 13 through the transfer of heat through the thermal conductive gel 11. The cooled coolant is discharged out of the battery box through the coolant outlet pipe 1205 at the end of the liquid cooling plate 12 and the battery box outlet nozzle 1702, thereby realizing the circulation of the battery box cooling system and keeping the battery temperature and temperature difference in a low range.

[0028] The liquid-cooled battery box of the present invention is provided with foam 1206 at the bottom of the liquid cooling plate 12, and the foam 1206 supports the liquid cooling plate 12 to avoid the contact between the stamping flow channel of the liquid cooling plate 12 and the lower box body 10, which may cause the liquid cooling plate to be compressed, so that the liquid cooling plate 12 is clamped and fixed by the rebound force of the foam 1206 and the gravity of the battery module 13, and the main body of the liquid cooling plate 1206 of the present invention does not directly contact the sheet metal part of the lower box body 10, so as to avoid the loss of energy of the liquid cooling plate 12, so that the battery module can be better cooled; the upper surface of the liquid cooling plate 12 is pasted with a strip PC sticker 1204, and the upper surface is coated with thermal conductive gel 11 after installation, and the thermal conductive gel 11 is flattened after the battery module 13 is put into the box, so that the thermal conductive gel 11 can cool the battery module more evenly and quickly, and the cooling effect is better.

[0029] The battery box of the utility model can connect several battery boxes and high-voltage boxes in series to form a battery system, and the battery system outputs energy to provide power for the ship. Ordinary battery boxes usually cause the temperature to rise and the temperature difference to increase due to the heat generated by the battery during use, causing the battery management system to issue an alarm, affecting the normal operation of the battery system. The liquid-cooled battery box of the utility model can effectively control the temperature and temperature difference of the battery through the built-in liquid cooling system, so that the battery can operate stably and reliably in a suitable environment. The battery box has a good overall cooling effect and the temperature rise in the battery module is low, thereby extending the cycle life of the battery cell, so that higher capacity battery cells can be accommodated in the battery box, thereby providing a more lasting endurance power for the ship, and the practical liquid cooling plate in the liquid-cooled battery box of the utility model can be disassembled relative to the lower box body, and the material selection of the liquid cooling plate can be more free, and lower-cost profiles can be selected for forming the liquid cooling plate. The manufacturing cost has more cost advantages than that of the integral molding with the lower box body, and the liquid cooling plate can be freely selected according to customer needs. The choice of liquid cooling plate when designing the battery box is also more flexible, and different liquid cooling plates can be used according to different battery modules, so that the design of the liquid-cooled battery box can be more flexible, the product adaptability is wider, and the product is more competitive.

[0030] Obviously, the above embodiments of the present invention are only examples for the purpose of clearly explaining the present invention.

[0031] It is not a limitation of the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A liquid-cooled battery box, comprising: lower box; A liquid cooling plate, the liquid cooling plate being mounted on the lower box; A battery module is located in the lower box and above the liquid cooling plate; It is characterized in that a plurality of positioning holes are arranged on the liquid cooling plate, a plurality of mounting columns are arranged on the lower box body, and the positioning holes can be inserted into the mounting columns.

2. The liquid-cooled battery box according to claim 1, characterized in that: The positioning holes are arranged at the four corners of the liquid cooling plate.

3. The liquid-cooled battery box according to claim 1, characterized in that: The main body of the liquid cooling plate does not contact the main body of the lower box.

4. The liquid-cooled battery box according to claim 1, characterized in that: It also includes foam, which is located on the lower surface of the liquid cooling plate and protrudes from the lower surface of the liquid cooling plate.

5. The liquid-cooled battery box according to claim 1, characterized in that: A heat-conducting gel is also included. The heat-conducting gel is located on the upper surface of the liquid cooling plate and below the battery module and in contact with the battery module.

6. The liquid-cooled battery box according to claim 1, characterized in that: Also included is an aerosol fire extinguisher located in the lower box.

7. The liquid-cooled battery box according to claim 1, characterized in that: A positive connector, a negative connector, a battery box input nozzle and a battery box output nozzle are also arranged on one side surface of the lower box.

8. The liquid-cooled battery box according to claim 7, characterized in that: A communication plug-in and a pressure relief valve are also provided on the side surface of the lower box body.

9. The liquid-cooled battery box according to claim 5, characterized in that: The liquid cooling plate is also provided with an insulating sheet, and the thermal conductive gel is located on the insulating sheet.

10. The liquid-cooled battery box according to claim 1, characterized in that: A cooling liquid inlet pipe and a cooling liquid outlet pipe are arranged on one side of the liquid cooling plate.

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