Liquid cooling device for power conversion and power conversion connector with same

Abstract

The utility model discloses a liquid cooling device for battery replacement and a battery replacement connector with the same. The power exchange connector is provided with a liquid cooling device, and the liquid cooling device comprises an inner sleeve, an outer sleeve, a sealing ring and a liquid exchange pipe. The outer wall of the inner sleeve is provided with a circular cooling groove and two sealing grooves, and the inner sleeve is sleeved on the outer wall of the terminal of the electric connector in an equal-diameter manner; the inner sleeve is fixed by the outer sleeve equal-diameter shaft sleeve; the inner ends of the liquid inlet end and the liquid outlet end of the outer sleeve are respectively communicated with the cooling tank; the sealing ring is installed in the sealing groove and tightly attached to the inner wall of the inner sleeve. And the lower ends of the two liquid changing pipes are respectively communicated with the liquid inlet end and the liquid outlet end, and the upper ends of the two liquid changing pipes are communicated with an external liquid cooling power circulator, so that the cooling of high-voltage positive and negative terminal charging is realized. According to the utility model, the overall current-carrying capability is improved through heat dissipation and cooling of the terminals in the battery swap station, the size and the capacity of the battery pack are more advantageous, and the endurance advantage of the electric vehicle is obvious.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, and in particular to a liquid cooling device for power exchange and a power exchange connector having the same. Background Art

[0002] At present, electric vehicles are widely used in all corners of social life. The battery packs of electric vehicles need to be charged regularly using battery swap connectors. Especially with the development of new energy vehicles, there are more and more requirements for battery swap connectors. For example, the battery swap connectors for in-station charging on the market generally have a steady-state current of about 300A. When the charging current is further increased (such as 400A or 450A) for charging, the common solution is to increase the size of the contact to increase the current-carrying capacity of the contact, such as increasing the terminal size. The defects are: first, the installation opening size of the battery swap connector is very large at this time, and the size of the battery swap connector will inevitably be larger, which will reduce the battery capacity of the battery pack and reduce the battery life of the electric vehicle; second, the larger size of the battery swap connector will increase the equipment cost and occupy more area. In order to obtain the same battery capacity, the battery pack volume becomes larger, which will reduce the layout space of other equipment. Utility Model Content

[0003] In order to solve one or more of the above problems, the utility model provides a liquid cooling device for battery swapping and a battery swapping connector having the same.

[0004] According to one aspect of the utility model, the liquid cooling device for power exchange includes: an inner sleeve, an outer sleeve, a sealing ring and a liquid exchange pipe;

[0005] The outer wall of the inner sleeve is provided with a circular cooling groove and two sealing grooves, the two sealing grooves are respectively close to the upper and lower ends of the cooling groove, and the inner sleeve is equal to the outer wall of the terminal of the socket-exchanger connector;

[0006] The outer sleeve has an equal diameter shaft sleeve to fix the inner sleeve. The outer sleeve and the cooling groove surround each other to form a liquid cavity. The upper end of the outer wall of the outer sleeve is provided with a liquid inlet end and the lower end is provided with a liquid outlet end. The inner ends of the liquid inlet end and the liquid outlet end are respectively connected to the cooling groove.

[0007] The sealing ring is installed in the sealing groove and fits tightly against the inner wall of the inner sleeve;

[0008] The lower ends of the two liquid exchange tubes are respectively connected to the liquid inlet end and the liquid outlet end and the upper ends are connected to an external liquid cooling power circulator, thereby realizing the cooling of the charging of the high-voltage positive and negative terminals.

[0009] In some embodiments, a circular ring positioning groove is provided on the upper surface of the end ring at the lower end of the outer wall of the inner sleeve, and a positioning step is provided on the upper end of the outer wall of the inner sleeve; the lower end of the outer sleeve is inserted into the positioning groove and the upper end sleeve is positioned on the outer wall of the step.

[0010] In some embodiments, the gap between the lower end of the outer wall of the outer sleeve and the inner wall of the positioning groove, and the gap between the upper end of the outer wall of the outer sleeve and the upper part of the positioning step are sealed and fixed respectively with structural adhesive.

[0011] In some embodiments, a turbulent flow structure is provided in the cooling groove of the inner sleeve.

[0012] In some embodiments, the liquid exchange tube is a PU hose, which is fixed to the liquid inlet end and the liquid outlet end by an elastic clamp;

[0013] Or the liquid inlet end and the liquid outlet end are right-angle elbows, and the vertical port of the right-angle elbow is a pagoda port.

[0014] In some embodiments, the liquid inlet end and the liquid outlet end are integrally connected to the tube body of the outer sleeve or are detachably threadedly connected.

[0015] In some embodiments, the outer sleeve is made of stainless steel;

[0016] Or the inner sleeve is made of alumina ceramic.

[0017] Or the sealing ring is an O-shaped sealing ring made of silicone rubber;

[0018] Or two liquid exchange tubes can be configured for single liquid cooling or dual liquid cooling.

[0019] In some embodiments, the inner sleeve and the outer sleeve are placed in the rear shell of the power exchange connector.

[0020] The upper end of the positioning step of the inner sleeve forms an upper connection end and the lower end of the pipe hole forms a lower plug-in groove;

[0021] The upper connection end is inserted into the lower hole groove of the tail cover of the power replacement connector, and the lower end surface of the inner sleeve fits the lower cavity wall of the rear shell;

[0022] The lower plug-in slot shaft sleeve is installed on the upper end of the column, and the installation column shaft sleeve fixes the lower ends of the two terminals;

[0023] The upper end of the liquid exchange tube passes through the vertical through hole of the tail cover.

[0024] The utility model also provides a power-changing connector with a liquid cooling device, comprising: a liquid cooling device, a terminal, a rear shell, a tail cover, a mounting column and a housing;

[0025] The inner cavity of the housing is fixed with two lower ends of the two terminals of the high voltage positive and negative electrodes respectively through two mounting posts;

[0026] The rear shell is sealed and fixed in the upper opening of the outer shell, and the upper ends of the terminals are respectively inserted into the two end cavities of the rear shell;

[0027] The two liquid cooling devices are respectively placed in the two end cavities of the rear shell, and each liquid cooling device surrounds and cools an upper end of a terminal.

[0028] In some embodiments, the liquid cooling device is any one of the above-mentioned liquid cooling devices for battery replacement.

[0029] The liquid cooling device for battery swapping and the battery swapping connector having the same adopt circulating coolant to cool the terminals, which can achieve good heat dissipation effect on the temperature rise of the terminals in the battery swapping station, effectively reduce the temperature rise of large current charging in the battery swapping station, and greatly improve the steady-state current of the battery swapping station for charging the battery pack; its beneficial effects are: first, the liquid cooling device cools the battery swapping connector to improve the overall current-carrying capacity, and the installation opening size of the battery swapping connector is smaller, and the overall size is smaller than that of the battery swapping connector of the traditional structure, which makes the battery pack size and capacity more advantageous, and makes the electric vehicle have more endurance advantage; second, when the charging current is increased, the installation opening size of the battery swapping connector at the vehicle end and the charging station end will not change. Compared with the traditional structure, the overall size is small, the equipment cost is low, the footprint is small, and space is provided for the arrangement of other parts; third, the liquid cooling device has a simple structure, and the inner sleeve and the outer sleeve of the mutual shaft sleeve are combined with the sealing ring to seal and reduce the pressure at both ends, thereby forming an effective cooling cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a three-dimensional schematic diagram of a power-swap connector with a liquid cooling device according to an embodiment of the utility model;

[0031] Figure 2 for Figure 1 The three-dimensional schematic diagram of the power-swap connector with a liquid cooling device after removing the shell;

[0032] Figure 3 for Figure 2 A schematic cross-sectional view of a power-swap connector with a liquid cooling device is shown;

[0033] Figure 4 for Figure 2 A three-dimensional schematic diagram of the liquid cooling device shown;

[0034] Figure 5 for Figure 4 A three-dimensional schematic diagram of the inner casing shown;

[0035] Figure 6 for Figure 4 A three-dimensional schematic diagram of the outer sleeve shown;

[0036] Liquid cooling device 01, inner sleeve 1, cooling groove 10, sealing groove 11, end ring 12, positioning groove 13, positioning step 14, upper connecting end 15, lower plug-in groove 16, outer sleeve 2, liquid inlet end 21, liquid outlet end 22, pagoda port 23, sealing ring 3, liquid exchange tube 4, structural adhesive 5, elastic clamp 6;

[0037] Terminal 02; rear shell 03; tail cover 04; mounting column 05, front mounting column 051, rear mounting column 052; outer shell 06. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0039] Figures 1 to 6 A liquid cooling device for battery swapping and a battery swapping connector having the same according to an embodiment of the utility model are schematically shown. As shown in the figure, the liquid cooling device for battery swapping comprises: an inner sleeve 1, an outer sleeve 2, a sealing ring 3 and a liquid exchange pipe 4;

[0040] The outer wall of the inner sleeve 1 is provided with a circular cooling groove 10 and two sealing grooves 11, the two sealing grooves 11 are respectively close to the upper and lower ends of the cooling groove 10, and the inner sleeve 1 is equal to the outer wall of the terminal 02 of the electrical connector;

[0041] The outer sleeve 2 is fixed with the inner sleeve 1 by an equal diameter shaft sleeve. The outer sleeve 2 and the cooling groove 10 surround each other to form a liquid cavity. The upper end of the outer wall of the outer sleeve 2 is provided with a liquid inlet terminal 21 and the lower end is provided with a liquid outlet terminal 22. The inner ends of the liquid inlet terminal 21 and the liquid outlet terminal 22 are respectively connected to the cooling groove 10.

[0042] The sealing ring 3 is installed in the sealing groove 11 and fits tightly against the inner wall of the inner sleeve 1;

[0043] The lower ends of the two liquid exchange tubes 4 are respectively connected to the liquid inlet terminal 21 and the liquid outlet terminal 22 and the upper ends are connected to an external liquid cooling power circulator, thereby realizing the cooling of the charging of the high-voltage positive and negative terminals 02.

[0044] The liquid cooling device for battery swapping adopts circulating coolant to cool the terminal 02, which can effectively dissipate the temperature rise of the terminal in the battery swap station, effectively reduce the temperature rise of high-current charging in the battery swap station, and greatly improve the steady-state current of the battery swap station for charging the battery pack; its beneficial effects are: first, the liquid cooling device cools the battery swap connector to improve the overall current-carrying capacity, and the installation opening size of the battery swap connector is smaller, which is smaller than the overall size of the battery swap connector with a traditional structure, making the battery pack size and capacity more advantageous, and making the electric vehicle have more endurance advantages; second, when the charging current is increased, the installation opening size of the battery swap connector at the vehicle end and the charging station end will not change. Compared with the traditional structure, the overall size is small, the equipment cost is low, the footprint is small, and space is provided for the arrangement of other parts; third, the liquid cooling device has a simple structure, and the inner sleeve 1 and the outer sleeve 2 of the mutual sleeve are combined with the sealing ring 3 to seal and reduce the pressure at both ends, forming an effective cooling cycle.

[0045] Furthermore, a radially protruding end ring 12 is provided at the lower end of the outer wall of the inner sleeve 1, a circular ring positioning groove 13 is provided on the upper surface of the end ring 12, and a positioning step 14 is provided at the upper end of the outer wall of the inner sleeve 1;

[0046] The lower end of the outer sleeve 2 is inserted into the positioning groove 13 and the upper end of the sleeve is positioned on the outer wall of the step 14. The beneficial effect is that the positioning groove 13 can further improve the installation accuracy of the cooling device.

[0047] Preferably, the gap between the lower end of the outer wall of the outer sleeve 2 and the inner wall of the positioning groove 13, and the gap between the upper end of the outer wall of the outer sleeve 2 and the upper part of the positioning step 14 are sealed and fixed respectively with structural adhesive 5. The beneficial effect is that the structural adhesive 5 can perform a good fixing and limiting effect, and at the same time form a double sealing effect with the sealing ring 3, and has better coolant sealing performance.

[0048] Furthermore, a turbulent structure is provided in the cooling groove 10 of the inner sleeve 1 to realize liquid circuit control. The beneficial effect is that the turbulent structure can increase the flow velocity of the coolant and has a better cooling effect under the same volume.

[0049] Preferably, the liquid exchange tube 4 is a PU hose, which is fixed to the liquid inlet end 21 and the liquid outlet end 22 by an elastic clamp 6; the beneficial effect is that the structure can achieve fast and reliable connection.

[0050] Preferably, the liquid inlet end 21 and the liquid outlet end 22 are right-angle elbows, and the vertical port of the right-angle elbow is a pagoda port 23. The beneficial effect is that the pagoda connector 23 can improve the connection strength of the PU hose and reduce the possibility of loosening.

[0051] Preferably, the liquid inlet end 21 and the liquid outlet end 22 are integrally connected to the tube body of the outer sleeve 2; the beneficial effect is that the structure has high strength and high sealing performance.

[0052] Preferably, the liquid inlet end 21 and the liquid outlet end 22 are detachably threadedly connected to the tube body of the outer sleeve 2. The beneficial effects are: the detachable threaded connection is convenient for replacement and maintenance, and the tube body of the outer sleeve 2 is small in size and easy to process.

[0053] Preferably, the outer sleeve 2 is made of stainless steel; the beneficial effect is that the material is stainless steel, which has good strength and hardness and is convenient for part molding.

[0054] Preferably, the inner sleeve 1 is made of alumina ceramics, which has the following beneficial effects: alumina ceramics have the characteristics of high strength and hardness, high thermal conductivity, and stable dimensions.

[0055] Preferably, the sealing ring 3 is an O-shaped sealing ring made of silicone rubber with a hardness of 50±5A;

[0056] Preferably, the liquid cooling power circulator is a water pump; the liquid flow rate reaches 2.5L / min, and can withstand a pressure of 0.3Mpa, and a commonly used water pump can meet the requirements.

[0057] Preferably, the coolant is ethanol; the beneficial effect is that ethanol has a good cooling effect.

[0058] Preferably, the two liquid exchange pipes 4 can be provided with single liquid cooling or dual liquid cooling. The beneficial effect is that this arrangement has a better liquid cooling effect.

[0059] Furthermore, the inner sleeve 1 and the outer sleeve 2 are placed in the rear shell 03 of the power exchange connector.

[0060] The upper end of the positioning step 14 of the inner sleeve 1 forms an upper connecting end 15 and the lower end of the tube hole forms a lower plug-in groove 16;

[0061] The upper connection end 15 is inserted into the lower hole groove of the tail cover 04 of the power exchange connector, and the lower end surface of the inner sleeve 1 fits the lower cavity wall of the rear shell 03;

[0062] The lower plug-in slot 16 is sleeved with the upper end of the mounting column 05, and the sleeve of the mounting column 05 fixes the lower ends of the two terminals 02;

[0063] The upper end of the liquid exchange pipe 4 passes through the vertical through hole of the tail cover 04. Its beneficial effects are: the structure is compact, the overall volume is small, and the liquid cooling device does not change the original structure.

[0064] A power-changing connector with a liquid cooling device, comprising: a liquid cooling device 01, a terminal 02, a rear shell 03, a tail cover 04, a mounting column 05 and a shell 06;

[0065] The inner cavity of the housing 06 is fixed with two mounting posts 05 to fix the lower ends of the two terminals 02 of the high voltage positive and negative electrodes respectively;

[0066] The rear shell 03 is sealed and fixed in the upper opening of the outer shell 06, and the upper ends of the terminals 02 are respectively inserted into the two end cavities of the rear shell 03;

[0067] The two liquid cooling devices 01 are respectively placed in the two end cavities of the rear shell 03 , and each liquid cooling device 01 surrounds and cools the upper end of a terminal 02 .

[0068] Preferably, the liquid cooling device 01 is any one of the above-mentioned liquid cooling devices for battery replacement.

[0069] The power-swap connector with a liquid cooling device adopts a liquid cooling device 01, which cools the terminal 02 by circulating coolant, and can have a good heat dissipation effect on the temperature rise of the terminal in the power-swap station, effectively reducing the temperature rise of high-current charging in the power-swap station, and greatly improving the steady-state current of the battery pack charging at the power-swap station; its beneficial effects are: first, the liquid cooling device cools the power-swap connector to improve the overall current-carrying capacity, and the installation opening size of the power-swap connector is smaller, and the overall size is smaller than that of the power-swap connector of the traditional structure, which makes the battery pack size and capacity more advantageous, and makes the electric vehicle have more endurance advantages; second, when the charging current is increased, the installation opening size of the power-swap connector at the vehicle end and the charging station end will not change. Compared with the traditional structure, the overall size is small, the equipment cost is low, the footprint is small, and space is provided for the arrangement of other parts; third, the liquid cooling device has a simple structure, and the inner sleeve 1 and the outer sleeve 2 of the mutual sleeve are combined with the sealing ring 3 to seal and reduce the pressure at both ends, forming an effective cooling cycle.

[0070] Preferably, the spring leaf of terminal 02 is a rotating spring structure, and the tail of terminal 02 is provided with a threaded structure to realize copper bar connection; its beneficial effect is: the connection of terminal 02 is reliable, and the plug-in life is up to more than 10,000 times.

[0071] Preferably, the shell 06 is provided with a square flat anti-rotation structure, which has the beneficial effects that the shell 06 realizes the protection, floating, guiding and other functions of the power exchange connector, and the square flat anti-rotation structure can effectively prevent the terminal 02 from rotating in the mounting column 05, and at the same time prevent the mounting column 05 from rotating in the shell 06.

[0072] Furthermore, the mounting column 05 is divided into a front mounting column 051 and a rear mounting column 052 whose sleeves are on the lower end of the terminal 02. The upper end of the front mounting column 051 is sleeved on the lower plug-in groove 16 and the lower end is sleeved on the through hole of the rear shell 03 and inserted into the upper groove of the rear connecting column 052. The beneficial effects are: stable structure, high strength and good insulation performance.

[0073] Preferably, the front mounting column 051 and the rear mounting column 052 are made of nylon material, and the rear shell 03 is made of aluminum alloy material. The beneficial effects are: nylon material has stable structure, high strength, good insulation and other properties, and realizes the fixing function of the liquid cooling component.

[0074] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A liquid cooling device for power exchange, characterized in that: include: An inner sleeve (1), an outer sleeve (2), a sealing ring (3) and a fluid exchange tube (4); The outer wall of the inner sleeve (1) is provided with a circular cooling groove (10) and two sealing grooves (11), the two sealing grooves (11) being respectively close to the upper and lower ends of the cooling groove (10), and the outer wall of the terminal (02) of the inner sleeve (1) being equal to the diameter of the sleeve exchange connector; The outer sleeve (2) is provided with an equal diameter shaft sleeve to fix the inner sleeve (1); the outer sleeve (2) and the cooling groove (10) surround each other to form a liquid cavity; the outer wall of the outer sleeve (2) is provided with a liquid inlet end (21) at the upper end and a liquid outlet end (22) at the lower end; the inner ends of the liquid inlet end (21) and the liquid outlet end (22) are respectively connected to the cooling groove (10); The sealing ring (3) is installed in the sealing groove (11) and fits tightly against the inner wall of the inner sleeve (1); The lower ends of the two liquid exchange tubes (4) are respectively connected to the liquid inlet end (21) and the liquid outlet end (22), and the upper ends are connected to an external liquid cooling power circulator, thereby achieving cooling of the charging of the high-voltage positive and negative terminals (02).

2. A liquid cooling device for battery replacement according to claim 1, characterized in that: The upper surface of the end ring (12) at the lower end of the outer wall of the inner sleeve (1) is provided with a circular positioning groove (13), and the upper end of the outer wall of the inner sleeve (1) is provided with a positioning step (14); the lower end of the outer sleeve (2) is inserted into the positioning groove (13) and the upper end is sleeved on the outer wall of the positioning step (14).

3. A liquid cooling device for battery replacement according to claim 2, characterized in that: The gap between the lower end of the outer wall of the outer sleeve (2) and the inner wall of the positioning groove (13), and the gap between the upper end of the outer wall of the outer sleeve (2) and the upper part of the positioning step (14) are sealed and fixed respectively using structural adhesive (5).

4. The liquid cooling device for battery replacement according to claim 1, characterized in that: A turbulent flow structure is provided in the cooling groove (10) of the inner sleeve (1).

5. The liquid cooling device for battery replacement according to claim 1, characterized in that: The liquid exchange tube (4) is a PU hose, which is fixed to the liquid inlet end (21) and the liquid outlet end (22) via an elastic clamp (6); Alternatively, the liquid inlet end (21) and the liquid outlet end (22) are right-angle elbows, and the vertical port of the right-angle elbow is a pagoda port (23).

6. A liquid cooling device for battery replacement according to claim 5, characterized in that: The liquid inlet end (21) and the liquid outlet end (22) are integrally connected to the tube body of the outer sleeve (2) or are detachably threadedly connected.

7. A liquid cooling device for battery replacement according to any one of claims 1 to 6, characterized in that: The outer sleeve (2) is made of stainless steel; Or the inner sleeve (1) is made of alumina ceramic; Or the sealing ring (3) is an O-shaped sealing ring made of silicone rubber; Or the two liquid exchange pipes (4) can be provided with a single liquid cooling arrangement or a double liquid cooling arrangement.

8. The liquid cooling device for battery replacement according to claim 7, characterized in that: The inner sleeve (1) and the outer sleeve (2) are placed in the rear shell (03) of the power exchange connector. The upper end of the positioning step (14) of the inner sleeve (1) forms an upper connecting end (15), and the lower end of the tube hole forms a lower plug-in groove (16); The upper connection end (15) is inserted into the lower hole groove of the tail cover (04) of the power exchange connector, and the lower end surface of the inner sleeve (1) is in contact with the lower cavity wall of the rear shell (03); The lower plug-in slot (16) is sleeved on the upper end of the mounting column (05), and the mounting column (05) sleeve fixes the lower ends of the two terminals (02); The upper end of the fluid exchange tube (4) passes through the vertical through hole of the tail cover (04).

9. A power-changing connector with a liquid cooling device, characterized in that: include: A liquid cooling device (01), a terminal (02), a rear shell (03), a tail cover (04), a mounting column (05), and a housing (06); the liquid cooling device (01) is a liquid cooling device for battery replacement according to any one of claims 1 to 8; The inner cavity of the housing (06) is used to fix the lower ends of the two terminals (02) of the high-voltage positive and negative electrodes respectively through the two mounting posts (05); The rear shell (03) is sealed and fixed in the upper opening of the outer shell (06), and the upper ends of the terminals (02) are respectively inserted into the two end cavities of the rear shell (03); The two liquid cooling devices (01) are respectively placed in two end cavities of the rear shell (03), and each of the liquid cooling devices (01) surrounds and cools an upper end of the terminal (02).

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