A liquid cooling thermal management test system for power batteries

Abstract

The invention discloses a liquid cooling thermal management test system for a power battery, comprising a battery pack shell, a battery group, and a liquid cooling system. The left and right sides of the inner wall of the battery pack shell are fixedly connected with an inner tank at equal distances. A disassembly assembly is arranged inside the inner tank. The disassembly assembly comprises two bidirectional threaded rods, which are respectively rotatably connected to the left and right sides of the inner wall of the inner tank. The opposite ends of the two bidirectional threaded rods are fixedly connected with a first bevel gear. The two sides of the surface of the bidirectional threaded rod are threadedly connected with a connecting block, and the top of the connecting block is rotatably connected with a connecting rod. The invention relates to the technical field of power batteries. The liquid cooling thermal management test system for a power battery toggles a lever so that the second bevel gear at the corresponding position of the battery group with a problem meshes with the first bevel gear, and rotates a hand wheel so that the battery group with a problem is lifted up, thereby facilitating the disassembly and maintenance of the battery group and improving the convenience of battery disassembly.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a liquid cooling thermal management test system for power batteries. Background Art

[0002] Driven by both policies and markets, my country's new energy vehicles have achieved a leapfrog development in industrialization and scale. Among them, the performance and requirements of power batteries are also constantly improving, especially the standards for energy density, cruising range and battery safety are becoming more and more stringent. This requires continuous improvement of talents and equipment in the testing field to meet more stringent industry needs. During the testing of liquid-cooled power battery packs, any test standard will put forward clear requirements on the temperature, humidity, and temperature inside the battery pack.

[0003] The battery packs used in existing new energy vehicles have battery packs installed inside. Because of their dense number and installation, when a problem occurs in the battery pack, the battery pack of a certain unit needs to be disassembled and repaired. However, the small internal space makes disassembly troublesome, and the battery pack may be damaged by collision due to the bumps during driving. In addition, the temperature drops in winter, which affects the battery capacity. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a liquid-cooled thermal management test system for a power battery, which solves the problems of the battery pack in the battery pack being difficult to disassemble and prone to collision, and the reduced capacity due to low temperatures in winter.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a liquid-cooled thermal management test system for a power battery comprises a battery pack shell, a battery pack, and a liquid cooling system, wherein the left and right sides of the inner wall of the battery pack shell are fixedly connected with an inner tank at equal distances, a disassembly assembly is arranged inside the inner tank, and the disassembly assembly comprises two bidirectional threaded rods, the two bidirectional threaded rods are rotatably connected to the left and right sides of the inner wall of the inner tank, respectively, the opposite ends of the two bidirectional threaded rods are fixedly connected with a first bevel gear, the surfaces of the two bidirectional threaded rods are threadedly connected with connecting blocks, the top of the connecting block is rotatably connected with a connecting rod, and the two The other end of each of the connecting rods is rotatably connected to a support plate, the liquid cooling system is fixedly connected to the front of the support plate by a fixing bolt, the top of the inner wall of the battery pack shell is rotatably connected to a rotating rod, the rotating rod penetrates multiple inner tank grooves and the battery pack shell and extends to the bottom of the battery pack shell, one end of the rotating rod located below the battery pack shell is fixedly connected to a handwheel, the surface of the rotating rod located inside the inner tank groove is slidably connected to a rotating sleeve through a block and the groove, the surface of the rotating sleeve located inside the inner tank groove is fixedly connected to a second bevel gear, the rotating sleeve penetrates the inner tank groove and extends to the surface below the inner tank groove and is fixedly connected to a shift rod.

[0006] Preferably, a clamping assembly is provided at the top and bottom of the inner tank groove, and the clamping assembly includes two oil channel valve blocks, and the two oil channel valve blocks are respectively fixedly connected to the top and bottom of the inner tank groove, and an oil channel is opened inside the oil channel valve block, and a fixing rod is fixedly connected to the back of the inner wall of the oil channel.

[0007] Preferably, the surface of the fixed rod is slidably connected to a sleeve, and the other end of the sleeve is fixedly connected to a wedge block, the wedge block penetrates the oil channel valve block and the inner tank groove and extends to the interior of the inner tank groove, and a return spring is provided on the surface of the fixed rod located outside the sleeve.

[0008] Preferably, a piston is slidably connected to the inner surface of the oil outlet of the oil channel, and a piston rod is fixedly connected to the front side of the piston. The piston rod passes through the oil channel valve block and the inner tank groove and extends to the interior of the inner tank groove. One end of the piston rod located inside the inner tank groove is fixedly connected to a pressure plate.

[0009] Preferably, the liquid cooling system includes a protective box, two left and right cooling fans are fixedly connected to the bottom of the protective box, an evaporator is fixedly connected to the bottom of the inner wall of the protective box, a battery cooler, an electronic water pump and a flow valve are arranged inside the protective box, the water outlet of the evaporator is connected to the water inlet of the battery cooler through a connecting pipe, the water outlet of the battery cooler is connected to the water inlet of the electronic water pump, and the water outlet of the electronic water pump is connected to the water inlet of the flow valve.

[0010] Preferably, the water outlet of the flow valve is connected to a water inlet pipe, which passes through the protective box and the battery pack shell and extends to the interior of the battery pack shell; the water inlet of the evaporator is connected to a return pipe, which passes through the protective box and the battery pack shell and extends to the interior of the battery pack shell; the part of the return pipe located inside the battery pack shell is embedded in the inner wall of the battery pack shell.

[0011] Preferably, a small turbine generator and a rechargeable battery are fixedly connected to the top of the inner wall of the battery pack shell, the water outlet of the water inlet pipe is connected to the water inlet of the small turbine generator through an electromagnetic three-way valve, the water outlet of the small turbine generator is connected to a water supply pipe, the other water outlet of the electromagnetic three-way valve is connected to the water supply pipe, the output end of the small turbine generator is connected to the rechargeable battery, and a heating wire is provided inside the inner wall of the battery pack shell, and the heating wire is powered by the rechargeable battery.

[0012] Preferably, a cooling pipe is fixedly connected to the back side of the inner wall of the inner tank through a connecting piece, the water inlet of the water supply pipe is connected to the water inlet of the cooling pipe, and the water outlet of the cooling pipe is connected to the return water pipe.

[0013] Beneficial Effects

[0014] The present invention provides a liquid cooling thermal management test system for a power battery. Compared with the prior art, the system has the following beneficial effects:

[0015] 1. The liquid-cooled thermal management test system of the power battery includes two bidirectional threaded rods through a disassembly component. The two bidirectional threaded rods are rotatably connected to the left and right sides of the inner wall of the inner tank groove respectively. The opposite ends of the two bidirectional threaded rods are fixedly connected with a first bevel gear. The surfaces of the two bidirectional threaded rods are threadedly connected with connecting blocks on both sides. The lever is moved so that the second bevel gear at the corresponding position of the battery pack with a problem is meshed with the first bevel gear, and the hand wheel is turned so that the battery pack with a problem is lifted up, thereby facilitating the disassembly and maintenance of the battery pack and improving the convenience of battery disassembly.

[0016] 2. The liquid-cooled thermal management test system of the power battery is provided with a clamping assembly at the top and bottom of the inner tank. The clamping assembly includes two oil channel valve blocks, which are respectively fixedly connected to the top and bottom of the inner tank. An oil channel is opened inside the oil channel valve block. The support plate moves and cooperates with the wedge block so that the wedge block pushes the hydraulic oil in the oil channel block to move, so that the two pressure plates move closer to the middle and clamp the battery pack, thereby ensuring the stability of the battery pack after installation.

[0017] 3. The liquid-cooled thermal management test system of the power battery is fixedly connected with a small turbine generator and a rechargeable battery through the top of the inner wall of the battery pack shell. The water outlet of the water inlet pipe is connected to the water inlet of the small turbine generator through an electromagnetic three-way valve. The coolant drives the small turbine generator to generate electricity, and this part of electricity is used to make the heating wire generate electricity in winter, thereby keeping the interior of the battery pack warm, thereby reducing the impact of temperature on the battery capacity and improving the reliability of the battery during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the appearance of the present invention;

[0019] Figure 2 is a cross-sectional view of a battery pack housing of the present invention;

[0020] Figure 3 It is a bottom sectional view of the inner tank of the present invention;

[0021] Figure 4 A top view of the inner tank of the present invention;

[0022] Figure 5 It is a side sectional view of the inner tank of the present invention;

[0023] Figure 6 It is a cross-sectional view of the rotating rod and the rotating sleeve of the present invention.

[0024] In the figure: 1 battery pack shell, 2 battery pack, 3 liquid cooling system, 31 protection box, 32 evaporator, 33 battery cooler, 34 electronic water pump, 35 cooling fan, 36 flow valve, 37 return pipe, 38 water inlet pipe, 39 cooling pipe, 4 inner tank groove, 5 disassembly assembly, 51 two-way threaded rod, 52 first bevel gear, 53 connecting block, 54 connecting rod, 55 support plate, 56 rotating sleeve, 57 rotating rod, 58 second bevel gear, 59 lever, 510 handwheel, 6 clamping assembly, 61 oil channel valve block, 62 oil channel, 63 fixed rod, 64 sliding sleeve, 65 return spring, 66 wedge block, 67 piston, 68 piston rod, 69 pressure plate, 7 small turbine generator, 8 rechargeable battery, 9 heating wire, 10 electromagnetic three-way valve, 11 water supply pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-6 The present invention provides a technical solution: a liquid cooling thermal management test system for a power battery comprises a battery pack shell 1, a battery pack 2, and a liquid cooling system 3. The left and right sides of the inner wall of the battery pack shell 1 are fixedly connected with an inner tank 4 at an equal distance. A disassembly component 5 is arranged inside the inner tank 4. The disassembly component 5 comprises two bidirectional threaded rods 51. The two bidirectional threaded rods 51 are rotatably connected to the left and right sides of the inner wall of the inner tank 4, respectively. The opposite ends of the two bidirectional threaded rods 51 are fixedly connected with a first bevel gear 52. The surfaces of the two bidirectional threaded rods 51 are threadedly connected with connecting blocks 53. The top of the connecting block 53 is rotatably connected with a connecting rod 54. The other ends of the two connecting rods 54 are A support plate 55 is rotatably connected, and the liquid cooling system 3 is fixedly connected to the front of the support plate 55 by fixing bolts. A rotating rod 57 is rotatably connected to the top of the inner wall of the battery pack shell 1. The rotating rod 57 penetrates multiple inner tank grooves 4 and the battery pack shell 1 and extends to the bottom of the battery pack shell 1. One end of the rotating rod 57 located below the battery pack shell 1 is fixedly connected to a handwheel 510. The surface of the rotating rod 57 located inside the inner tank groove 4 is slidably connected to a rotating sleeve 56 through a clamping block and a clamping slot. The surface of the rotating sleeve 56 located inside the inner tank groove 4 is fixedly connected to a second bevel gear 58. The rotating sleeve 56 penetrates the inner tank groove 4 and extends to the surface below the inner tank groove 4 and is fixedly connected to a lever 59.

[0027] A clamping assembly 6 is provided at the top and bottom of the inner tank 4. The clamping assembly 6 includes two oil channel valve blocks 61. The two oil channel valve blocks 61 are fixedly connected to the top and bottom of the inner tank 4 respectively. An oil channel 62 is opened inside the oil channel valve block 61, and a fixing rod 63 is fixedly connected to the back of the inner wall of the oil channel 62.

[0028] The surface of the fixed rod 63 is slidably connected to a sleeve 64, and the other end of the sleeve 64 is fixedly connected to a wedge block 66. The wedge block 66 penetrates the oil channel valve block 61 and the inner tank groove 4 and extends to the interior of the inner tank groove 4. A return spring 65 is sleeved on the surface of the fixed rod 63 located outside the sleeve 64.

[0029] A piston 67 is slidably connected to the inner surface of the oil outlet of the oil channel 62, and a piston rod 68 is fixedly connected to the front of the piston 67. The piston rod 68 penetrates the oil channel valve block 61 and the inner tank groove 4 and extends to the interior of the inner tank groove 4. One end of the piston rod 68 located inside the inner tank groove 4 is fixedly connected to a pressure plate 69.

[0030] The liquid cooling system 3 includes a protective box 31, two left and right cooling fans 35 are fixedly connected to the bottom of the protective box 31, an evaporator 32 is fixedly connected to the bottom of the inner wall of the protective box 31, a battery cooler 33, an electronic water pump 34 and a flow valve 36 are arranged inside the protective box 31, the water outlet of the evaporator 32 is connected to the water inlet of the battery cooler 33 through a connecting pipe, the water outlet of the battery cooler 33 is connected to the water inlet of the electronic water pump 34, and the water outlet of the electronic water pump 34 is connected to the water inlet of the flow valve 36.

[0031] The water outlet of the flow valve 36 is connected to the water inlet pipe 38, which passes through the protective box 31 and the battery pack shell 1 and extends to the interior of the battery pack shell 1. The water inlet of the evaporator 32 is connected to the return pipe 37, which passes through the protective box 31 and the battery pack shell 1 and extends to the interior of the battery pack shell 1. The part of the return pipe 37 located inside the battery pack shell 1 is embedded in the inner wall of the battery pack shell 1.

[0032] A small turbine generator 7 and a rechargeable battery 8 are fixedly connected to the top of the inner wall of the battery pack shell 1, the water outlet of the water inlet pipe 38 is connected to the water inlet of the small turbine generator 7 through an electromagnetic three-way valve 10, the water outlet of the small turbine generator 7 is connected to a water supply pipe 11, the other water outlet of the electromagnetic three-way valve 10 is connected to the water supply pipe 11, the output end of the small turbine generator 7 is connected to the rechargeable battery 8, and a heating wire 9 is arranged inside the inner wall of the battery pack shell 1, the heating wire 9 is powered by the rechargeable battery 8, the electromagnetic three-way valve 10 is usually kept in a normally open state with the water supply pipe 11, and is in a normally closed state with the water inlet of the small turbine generator 7.

[0033] A cooling pipe 39 is fixedly connected to the back of the inner wall of the inner tank 4 via a connector, the water inlet of the water supply pipe 11 is connected to the water inlet of the cooling pipe 39 , and the water outlet of the cooling pipe 39 is connected to the return water pipe 37 .

[0034] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0035] When the temperature inside the battery pack shell 1 is high, the electronic water pump 34, the battery cooler 33 and the cooling fan 35 are started, and the cooling water passes through the small turbine generator 7 and then enters the cooling pipes 39 in the multiple inner tanks 4 in turn, thereby cooling the liquid cooling system 3. In winter, the water outlet connected to the electromagnetic three-way valve 10 and the water supply pipe 11 can be closed and the water outlet connected to the small turbine generator 7 can be opened so that the cooling water enters the water inlet pipe 38 and enters the small turbine generator 7. After entering the small turbine generator 7, the worm gear of the small turbine generator 7 is driven to rotate, thereby generating electricity and storing electrical energy in the rechargeable battery 8. The heating wire 9 is powered by the rechargeable battery 8 to generate heat, thereby protecting the battery pack 2 to prevent the battery capacity from decreasing. When the battery pack 2 needs to be disassembled, first use an electronic instrument to determine which battery pack 2 in the inner tank 4 has a problem, and pull the rotating sleeve 56 downward through the lever 59 at the corresponding position, so that the second bevel gear 58 The first bevel gear 52 is meshed with the first bevel gear 52, and the hand wheel 510 is turned at this time. The rotation of the hand wheel 510 drives the second bevel gear 58 to rotate, and the second bevel gear 58 rotates and transmits it to the first bevel gear 52. The rotation of the first bevel gear 52 drives the bidirectional threaded rod 51 to rotate. The rotation of the bidirectional threaded rod 51 causes the two connecting blocks 53 to move closer to the middle, thereby lifting the support plate 55, so that the battery pack 2 is ejected to the outside of the inner tank groove 4, thereby facilitating disassembly. When installing the battery pack 2, the hand wheel 510 is turned in the opposite direction so that the support plate 55 drives the battery pack 2 back to the inside of the inner tank groove 4. When the support plate 55 enters the inside of the inner tank groove 4, both sides of the support plate 55 contact with the wedge blocks 66, thereby pushing the wedge blocks 66 to move into the oil channel 62, thereby pushing the hydraulic oil in the oil channel 62 to move, the hydraulic oil moves and pushes the piston 67 to move, and the piston 67 moves and causes the two pressure plates 69 to move closer to the two sides of the battery pack 2 through the piston rod 68, thereby clamping the battery pack 2 to ensure stability after installation.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A liquid cooling thermal management test system for a power battery, comprising a battery pack housing (1), a battery pack (2), and a liquid cooling system (3), characterized in that: The left and right sides of the inner wall of the battery pack shell (1) are equidistantly fixedly connected with an inner tank groove (4), and a disassembly assembly (5) is arranged inside the inner tank groove (4). The disassembly assembly (5) comprises two bidirectional threaded rods (51), and the two bidirectional threaded rods (51) are respectively rotatably connected to the left and right sides of the inner wall of the inner tank groove (4), and the opposite ends of the two bidirectional threaded rods (51) are fixedly connected with a first bevel gear (52), and the two sides of the surface of the bidirectional threaded rods (51) are threadedly connected with connecting blocks (53), and the top of the connecting block (53) is rotatably connected with a connecting rod (54), and the other ends of the two connecting rods (54) are rotatably connected with a support plate (55), and the liquid cooling system (3) is connected to the support plate (55) by fixing bolts. The front side of the support plate (55) is fixedly connected, the top of the inner wall of the battery pack shell (1) is rotatably connected to a rotating rod (56), the rotating rod (56) penetrates through a plurality of inner tank grooves (4) and the battery pack shell (1) and extends to the bottom of the battery pack shell (1), one end of the rotating rod (56) located below the battery pack shell (1) is fixedly connected to a hand wheel (510), the surface of the rotating rod (56) located inside the inner tank groove (4) is slidably connected to a rotating sleeve (57) through a clamping block and the clamping slot, the surface of the rotating sleeve (57) located inside the inner tank groove (4) is fixedly connected to a second bevel gear (58), and the surface of the rotating sleeve (57) penetrating through the inner tank groove (4) and extending to the bottom of the inner tank groove (4) is fixedly connected to a shifting rod (59); The top and bottom of the inner tank (4) are both provided with a clamping assembly (6), the clamping assembly (6) comprising two oil passage valve blocks (61), the two oil passage valve blocks (61) being fixedly connected to the top and bottom of the inner tank (4) respectively, an oil passage (62) being provided inside the oil passage valve block (61), and a fixing rod (63) being fixedly connected to the back of the inner wall of the oil passage (62); The surface of the fixed rod (63) is slidably connected to a sliding sleeve (64), and the other end of the sliding sleeve (64) is fixedly connected to a wedge block (66). The wedge block (66) penetrates the oil channel valve block (61) and the inner tank groove (4) and extends to the interior of the inner tank groove (4). The surface of the fixed rod (63) located outside the sliding sleeve (64) is sleeved with a return spring (65).

2. The liquid cooling thermal management test system for a power battery according to claim 1, characterized in that: A piston (67) is slidably connected to the inner surface of the oil outlet of the oil channel (62); a piston rod (68) is fixedly connected to the front of the piston (67); the piston rod (68) penetrates the oil channel valve block (61) and the inner tank groove (4) and extends to the interior of the inner tank groove (4); one end of the piston rod (68) located inside the inner tank groove (4) is fixedly connected to a pressure plate (69).

3. The liquid cooling thermal management test system for a power battery according to claim 1, characterized in that: The liquid cooling system (3) comprises a protection box (31), the bottom of which is fixedly connected to two left and right cooling fans (35), the bottom of the inner wall of the protection box (31) is fixedly connected to an evaporator (32), the interior of the protection box (31) is provided with a battery cooler (33), an electronic water pump (34) and a flow valve (36), the water outlet of the evaporator (32) is connected to the water inlet of the battery cooler (33) through a connecting pipe, the water outlet of the battery cooler (33) is connected to the water inlet of the electronic water pump (34), and the water outlet of the electronic water pump (34) is connected to the water inlet of the flow valve (36).

4. The liquid cooling thermal management test system for a power battery according to claim 3, characterized in that: The water outlet of the flow valve (36) is connected to a water inlet pipe (38), and the water inlet pipe (38) passes through the protective box (31) and the battery pack shell (1) and extends to the interior of the battery pack shell (1). The water inlet of the evaporator (32) is connected to a water return pipe (37), and the water return pipe (37) passes through the protective box (31) and the battery pack shell (1) and extends to the interior of the battery pack shell (1). The part of the water return pipe (37) located inside the battery pack shell (1) is embedded in the inner wall of the battery pack shell (1).

5. The liquid cooling thermal management test system for a power battery according to claim 4, characterized in that: A small turbine generator (7) and a rechargeable battery (8) are fixedly connected to the top of the inner wall of the battery pack housing (1); a water outlet of the water inlet pipe (38) is connected to the water inlet of the small turbine generator (7) through an electromagnetic three-way valve (10); the water outlet of the small turbine generator (7) is connected to a water supply pipe (11); another water outlet of the electromagnetic three-way valve (10) is connected to the water supply pipe (11); an output end of the small turbine generator (7) is connected to the rechargeable battery (8); a heating wire (9) is arranged inside the inner wall of the battery pack housing (1); the heating wire (9) is powered by the rechargeable battery (8).

6. The liquid cooling thermal management test system for a power battery according to claim 5, characterized in that: The back side of the inner wall of the inner tank (4) is fixedly connected to a cooling pipe (39) via a connecting piece, the water inlet of the water supply pipe (11) is connected to the water inlet of the cooling pipe (39), and the water outlet of the cooling pipe (39) is connected to the return water pipe (37).

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