Soaking type liquid cooling system of power battery box array

Abstract

The invention discloses a soaking type liquid cooling system of a power battery box array. The soaking type liquid cooling system comprises liquid cooling battery boxes arranged along a linear array, a cold oil leading-in pipe, a hot oil leading-out pipe and a transition pipe, the cooling liquid from the cold oil leading-in pipe sequentially flows through the left parts of the liquid-cooled battery boxes and then flows into one end of the transition pipe, and the cooling liquid led out from the other end of the transition pipe sequentially flows through the right parts of the liquid-cooled battery boxes and then is discharged through the hot oil leading-out pipe; the problem that the heat absorption efficiency of the cooling liquid on the extending path of the cooling path is gradually reduced is solved.

Description

Technical Field

[0001] The present invention belongs to the field of battery cooling. Background Art

[0002] During the process of the coolant of the liquid-cooled power battery system flowing along the cooling channel, since the coolant gradually absorbs heat, the temperature of the coolant gradually rises along the path of the cooling channel, thereby gradually reducing the heat absorption efficiency of the coolant along the path of the cooling channel. Therefore, the cooling effect of the battery cells closer to the liquid inlet end is better, and conversely, the cooling effect of the battery cells farther from the liquid inlet end is worse, thus causing the problem that the heat absorption efficiency of the coolant gradually decreases along the extended path of the cooling path. Summary of the Invention

[0003] Object of the Invention: In order to overcome the deficiencies in the prior art, the present invention provides a heat equalizing liquid cooling system for a power battery box array, which solves the problem that the heat absorption efficiency of the coolant gradually decreases along the extended path of the cooling path.

[0004] Technical Solution: To achieve the above object, a heat equalizing liquid cooling system for a power battery box array of the present invention includes liquid-cooled battery boxes arranged in a linear array, a cold oil inlet pipe, a hot oil outlet pipe, and a transition pipe; the coolant from the cold oil inlet pipe flows through the left parts of each liquid-cooled battery box in sequence and then flows into one end of the transition pipe, and the coolant exported from the other end of the transition pipe flows through the right parts of each liquid-cooled battery box in sequence and is then discharged through the hot oil outlet pipe.

[0005] Further, the transition pipe is at one end of the linear array structure formed by several liquid-cooled battery boxes, and both the cold oil inlet pipe and the hot oil outlet pipe are at the other end of the linear array structure formed by several liquid-cooled battery boxes.

[0006] Further, at one end of the left part of each liquid-cooled battery box close to the cold oil inlet pipe and at the end far from the cold oil inlet pipe, an a inlet pipe and an a outlet pipe are coaxially and integrally arranged respectively;

[0007] At one end of the right part of each liquid-cooled battery box far from the hot oil outlet pipe and at the end close to the hot oil outlet pipe, a b inlet pipe and a b outlet pipe are coaxially and integrally arranged respectively.

[0008] Further, the a outlet pipe and the b inlet pipe of the liquid-cooled battery box closest to the transition pipe among several liquid-cooled battery boxes arranged in a linear array are respectively connected to both ends of the transition pipe;

[0009] The a inlet pipe and the b outlet pipe of the liquid-cooled battery box farthest from the transition pipe among several liquid-cooled battery boxes arranged in a linear array are respectively connected to the cold oil inlet pipe and the hot oil outlet pipe;

[0010] Among several liquid-cooled battery boxes arranged in a linear array, except for the two liquid-cooled battery boxes that are farthest from and closest to the transition pipe, the a liquid outlet pipe and the b liquid inlet pipe of any liquid-cooled battery box are integrally connected to the a liquid inlet pipe and the b liquid outlet pipe of an adjacent liquid-cooled battery box on the side close to the transition pipe respectively; the a liquid inlet pipe and the b liquid outlet pipe of any liquid-cooled battery box are integrally connected to the a liquid outlet pipe and the b liquid inlet pipe of an adjacent liquid-cooled battery box on the side far from the transition pipe respectively.

[0011] Further, a number of columnar battery cell units are fixedly arranged in the liquid-cooled battery box in an array, and the voids between the columnar battery cell units in the liquid-cooled battery box are filled with uniform heat transfer oil, so that all the columnar battery cell units in the liquid-cooled battery box are completely immersed in the uniform heat transfer oil.

[0012] Further, the columnar battery cell units in the liquid-cooled battery box include a number of a columnar battery cell units and a number of b columnar battery cell units.

[0013] Further, a number of a columnar battery cell units are distributed in a straight line array in the middle along the length direction of the liquid-cooled battery box. A left-handed conversion heat cylinder with an axial through hole is arranged in parallel on the left side of the leftmost a columnar battery cell unit in the straight line array of a columnar battery cell units; a right-handed conversion heat cylinder with an axial through hole is arranged in parallel on the right side of the rightmost a columnar battery cell unit in the straight line array of a columnar battery cell units.

[0014] Further, the upper and lower ends of the left-handed conversion heat cylinder are rotationally connected and cooperated with the a liquid outlet pipe and the a liquid inlet pipe respectively through sealed bearings in coaxial alignment; the upper and lower ends of the right-handed conversion heat cylinder are rotationally connected and cooperated with the b liquid inlet pipe and the b liquid outlet pipe respectively through sealed bearings in coaxial alignment.

[0015] Further, a left-handed spiral hydraulic driving blade is spirally arranged on the inner wall of the left-handed conversion heat cylinder. When the liquid flows along the axial direction through the left heat exchange channel with an axial through hole in the left-handed conversion heat cylinder, the flowing liquid pushes the left-handed spiral hydraulic driving blade, causing the left-handed conversion heat cylinder to rotate along the axis;

[0016] A right-handed spiral hydraulic driving blade is spirally arranged on the inner wall of the right-handed conversion heat cylinder. When the liquid flows along the axial direction through the right heat exchange channel with an axial through hole in the right-handed conversion heat cylinder, the flowing liquid pushes the right-handed spiral hydraulic driving blade, causing the right-handed conversion heat cylinder to rotate along the axis.

[0017] Further, the spiral direction of the left-handed spiral hydraulic driving blade is opposite to the spiral direction of the right-handed spiral hydraulic driving blade;

[0018] A number of b columnar battery cell units are arranged in a waist-shaped closed-loop array around the linear array structure jointly formed by the left-handed conversion heat cylinder, the right-handed conversion heat cylinder and a number of a columnar battery cell units;

[0019] The "linear array structure" composed of a left-handed conversion heat cylinder, a right-handed conversion heat cylinder, and a number of a columnar battery core units forms a kidney-shaped closed-loop uniform heat oil flow gap with the "waist-shaped closed-loop enclosed array structure" composed of a number of b columnar battery core units. A kidney-shaped closed-loop uniform heat oil driving belt extending along the path of the kidney-shaped closed-loop uniform heat oil flow gap is arranged in the liquid-cooled battery box. The inner arc surfaces at both ends of the kidney-shaped closed-loop uniform heat oil driving belt are respectively closely attached to the outer cylinder surfaces of the left-handed conversion heat cylinder and the right-handed conversion heat cylinder;

[0020] A liquid guiding gap a is formed between the inner wall surface of the kidney-shaped closed-loop uniform heat oil driving belt and the outer wall of each a columnar battery core unit; a liquid guiding gap b is formed between the outer wall surface of the kidney-shaped closed-loop uniform heat oil driving belt and the outer wall of each b columnar battery core unit.

[0021] Beneficial effects: The heat absorption of the left-handed conversion heat cylinder and the right-handed conversion heat cylinder in any liquid-cooled battery box of the present invention forms a high-low compensation effect. Therefore, the total heat absorption in a number of liquid-cooled battery boxes from bottom to top is relatively consistent, eliminating the problem that the total heat absorption in a number of liquid-cooled battery boxes from bottom to top gradually decreases due to the gradual reduction of the heat absorption efficiency of the cooling oil as its flow stroke increases; it can be seen that this structure solves the problem of uneven total heat absorption; at the same time, the kidney-shaped closed-loop uniform heat oil driving belt drives the uniform heat oil in the liquid-cooled battery box to circulate along the closed-loop path of the kidney-shaped closed-loop uniform heat oil flow gap under the action of liquid viscosity, thereby eliminating the problem that the left and right heat absorption efficiencies in a single liquid-cooled battery box are unbalanced. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the overall structure of this device;

[0023] Figure 2 It is a schematic diagram of the structure of a single liquid-cooled battery box;

[0024] Figure 3 It is for Figure 2 the enlarged schematic diagram at the marked position 20 of

[0025] Figure 4 It is a cross-sectional schematic diagram of a single liquid-cooled battery box;

[0026] Figure 5 It is for Figure 4 the top view of

[0027] Figure 6 It is for Figure 5 the schematic diagram of the kidney-shaped closed-loop uniform heat oil flow gap after hiding the kidney-shaped closed-loop uniform heat oil driving belt on the basis of Detailed Embodiment

[0028] The present invention will be further described below with reference to the drawings.

[0029] As attached Figures 1 to 6 A heat equalization type liquid cooling system for a power battery box array, comprising liquid cooling battery boxes 3 arranged in a linear array, a cold oil inlet pipe 1, a hot oil outlet pipe 2 and a transition pipe 6; the coolant from the cold oil inlet pipe 1 flows through the left parts of each liquid cooling battery box 3 in sequence and then flows into one end of the transition pipe 6, and the coolant discharged from the other end of the transition pipe 6 flows through the right parts of each liquid cooling battery box 3 in sequence and is discharged through the hot oil outlet pipe 2.

[0030] As Figure 1 Shown, the transition pipe 6 is at one end of the linear array structure formed by several liquid cooling battery boxes 3, and the cold oil inlet pipe 1 and the hot oil outlet pipe 2 are both at the other end of the linear array structure formed by several liquid cooling battery boxes 3.

[0031] At one end of the left part of each liquid cooling battery box 3 close to the cold oil inlet pipe 1 and at the end far from the cold oil inlet pipe 1, an a inlet pipe 4a and an a outlet pipe 5a are coaxially and integrally arranged respectively; at one end of the right part of each liquid cooling battery box 3 far from the hot oil outlet pipe 2 and at the end close to the hot oil outlet pipe 2, a b inlet pipe 4b and a b outlet pipe 5b are coaxially and integrally arranged respectively; the a outlet pipe 5a and the b inlet pipe 4b of the liquid cooling battery box 3 closest to the transition pipe 6 among several liquid cooling battery boxes 3 arranged in a linear array are respectively connected to both ends of the transition pipe 6; the a inlet pipe 4a and the b outlet pipe 5b of the liquid cooling battery box 3 farthest from the transition pipe 6 among several liquid cooling battery boxes 3 arranged in a linear array are respectively connected to the cold oil inlet pipe 1 and the hot oil outlet pipe 2;

[0032] Among several liquid cooling battery boxes 3 arranged in a linear array, except for the two liquid cooling battery boxes 3 farthest from and closest to the transition pipe 6, the a outlet pipe 5a and the b inlet pipe 4b of any liquid cooling battery box 3 are respectively integrally connected to the a inlet pipe 4a and the b outlet pipe 5b of an adjacent liquid cooling battery box 3 on the side close to the transition pipe 6; the a inlet pipe 4a and the b outlet pipe 5b of any liquid cooling battery box 3 are respectively integrally connected to the a outlet pipe 5a and the b inlet pipe 4b of an adjacent liquid cooling battery box 3 on the side far from the transition pipe 6.

[0033] As Figure 2 / 3 / 4 / 5 shown, several columnar cell units 8 are fixedly arranged in an array in the liquid cooling battery box 3, and uniform heat transfer oil is filled in the gap 30 between each columnar cell unit 8 in the liquid cooling battery box 3, so that each columnar cell unit 8 in the liquid cooling battery box 3 is completely immersed in the uniform heat transfer oil.

[0034] The columnar battery cell units 8 in the liquid-cooled battery box 3 include a number of a columnar battery cell units 8a and a number of b columnar battery cell units 8b; a number of a columnar battery cell units 8a are distributed in a straight-line array in the middle along the length direction of the liquid-cooled battery box 3. A left-handed conversion heat cylinder 14 with a through axis is arranged in parallel on the left side of the leftmost a columnar battery cell unit 8a among the straight-line array of a columnar battery cell units 8a. The upper and lower ends of the left-handed conversion heat cylinder 14 are respectively rotationally and communicatively matched with an a liquid outlet pipe 5a and an a liquid inlet pipe 4a through sealed bearings 9 coaxially. A left-handed spiral hydraulic driving vane 12 is spirally arranged on the inner wall of the left-handed conversion heat cylinder 14. When the liquid flows through the left heat exchange channel 10 with a through axis in the left-handed conversion heat cylinder 14 along the axis direction, the flowing liquid pushes the left-handed spiral hydraulic driving vane 12, causing the left-handed conversion heat cylinder 14 to rotate along the axis.

[0035] A right-handed conversion heat cylinder 15 with a through axis is arranged in parallel on the right side of the rightmost a columnar battery cell unit 8a among the straight-line array of a columnar battery cell units 8a; the upper and lower ends of the right-handed conversion heat cylinder 15 are respectively rotationally and communicatively matched with a b liquid inlet pipe 4b and a b liquid outlet pipe 5b through sealed bearings 9 coaxially. A right-handed spiral hydraulic driving vane 13 is spirally arranged on the inner wall of the right-handed conversion heat cylinder 15. The hydraulic driving vane can have many forms, such as a propeller vane. When the liquid flows through the right heat exchange channel 11 with a through axis in the right-handed conversion heat cylinder 15 along the axis direction, the flowing liquid pushes the right-handed spiral hydraulic driving vane 13, causing the right-handed conversion heat cylinder 15 to rotate along the axis.

[0036] The spiral direction of the left-handed spiral hydraulic driving vane 12 is opposite to that of the right-handed spiral hydraulic driving vane 13.

[0037] As Figure 4 and 5 shown, a number of b columnar battery cell units 8b are arranged in a waist-shaped closed-loop surrounding array outside the straight-line array structure jointly formed by the left-handed conversion heat cylinder 14, the right-handed conversion heat cylinder 15 and a number of a columnar battery cell units 8a.

[0038] A waist-shaped closed-loop uniform heat oil flow gap 7 is formed between the "straight-line array structure" jointly formed by the left-handed conversion heat cylinder 14, the right-handed conversion heat cylinder 15 and a number of a columnar battery cell units 8a and the "waist-shaped closed-loop surrounding array structure" formed by a number of b columnar battery cell units 8b. As Figure 6 shown, a waist-shaped closed-loop uniform heat oil driving belt 16 extending along the path of the waist-shaped closed-loop uniform heat oil flow gap 7 is arranged in the liquid-cooled battery box 3. As Figure 5As shown, the inner arc surfaces at both ends of the kidney-shaped closed-loop uniform heat oil driving belt 16 are closely attached to the outer cylinder surfaces of the left-handed conversion heat cylinder 14 and the right-handed conversion heat cylinder 15 respectively; a liquid guiding gap 18 is formed between the inner wall surface of the kidney-shaped closed-loop uniform heat oil driving belt 16 and the outer walls of each a-columnar battery cell unit 8a; a liquid guiding gap 17 is formed between the outer wall surface of the kidney-shaped closed-loop uniform heat oil driving belt 16 and the outer walls of each b-columnar battery cell unit 8b; when the left-handed conversion heat cylinder 14 and the right-handed conversion heat cylinder 15 rotate synchronously, the kidney-shaped closed-loop uniform heat oil driving belt 16 makes a linear motion along its own extension path driven by the left-handed conversion heat cylinder 14 and the right-handed conversion heat cylinder 15; thus, the kidney-shaped closed-loop uniform heat oil driving belt 16 drives the uniform heat oil in the liquid cooling battery box 3 to circulate along the closed-loop path of the kidney-shaped closed-loop uniform heat oil flow gap 7 under the action of liquid viscosity.

[0039] The kidney-shaped closed-loop uniform heat oil driving belt 16 in this case is a tightened closed-loop nylon fiber belt body. In order to improve the liquid viscosity ability and the liquid transmission ability, both the inner and outer surfaces of the kidney-shaped closed-loop uniform heat oil driving belt 16 adopt a uniform array of pit structures, a uniform array of porous structures, or surface roughening treatment.

[0040] The uniform heat oil in the liquid cooling battery box 3 in this case is electrical insulating oil; an elastic pressure compensation structure, such as an elastic rubber airbag and other pressure buffering devices, is arranged in the liquid cooling battery box 3 to counteract thermal expansion and contraction; both the left-handed conversion heat cylinder 14 and the right-handed conversion heat cylinder 15 are heat-conducting metals, such as copper alloy, etc.

[0041] Working method: During the working process of the liquid cooling battery box 3, due to the thermal effect of the columnar battery cell unit 8, each columnar battery cell unit 8 gradually releases heat into the uniform heat oil in the liquid cooling battery box 3;

[0042] Liquid flow path: Under the action of an external circulation pump, low-temperature coolant enters from the cold oil inlet pipe 1, and successively flows through the left-handed conversion heat cylinder 14 on the left side of each liquid cooling battery box 3 and then flows into one end of the transition pipe 6. The coolant discharged from the other end of the transition pipe 6 successively flows through the right-handed conversion heat cylinder 15 on the right side of each liquid cooling battery box 3 and is discharged through the hot oil outlet pipe 2; during the process of the coolant flowing through each left-handed conversion heat cylinder 14, the left-handed conversion heat cylinder 14 is continuously kept at a low temperature, so that the left-handed conversion heat cylinder 14 continuously absorbs the heat of the uniform heat oil in the left part of the inner cavity of the liquid cooling battery box 3; during the process of the coolant flowing through each right-handed conversion heat cylinder 15, the right-handed conversion heat cylinder 15 is continuously kept at a low temperature, so that the right-handed conversion heat cylinder 15 continuously absorbs the heat of the uniform heat oil in the right part of the inner cavity of the liquid cooling battery box 3;

[0043] In the above liquid flow path, since the coolant gradually absorbs heat along the path, the liquid temperature of the coolant itself will gradually rise as the flow travel of itself increases along the overall flow path, so that the heat absorption efficiency of the coolant gradually decreases as the flow travel of itself increases. Based on this characteristic, fromFigure 1 From the perspective of Figure 1 , the heat absorption efficiency of the left-handed conversion heat cylinders 14 in each liquid-cooled battery box 3 is higher than that of the right-handed conversion heat cylinders 15. The heat absorption efficiency of the left-handed conversion heat cylinders 14 in several liquid-cooled battery boxes 3 from bottom to top decreases successively, and the heat absorption efficiency of the right-handed conversion heat cylinders 15 in several liquid-cooled battery boxes 3 from bottom to top increases successively. The left-handed conversion heat cylinder 14 and the right-handed conversion heat cylinder 15 at both ends of the same liquid-cooled battery box 3 are at the same height, so that the heat absorption of the left-handed conversion heat cylinder 14 and the right-handed conversion heat cylinder 15 in any liquid-cooled battery box 3 forms a high-low compensation effect. Therefore, the total heat absorption in several liquid-cooled battery boxes 3 from bottom to top is relatively consistent, eliminating the problem that the total heat absorption in several liquid-cooled battery boxes 3 from bottom to top decreases successively due to the gradual decrease of the heat absorption efficiency of the cooling oil as the flow path increases; it can be seen that this structure solves the problem of uneven total heat absorption, but from the perspective of the inside of a single liquid-cooled battery box 3, the left and right heat absorption efficiencies in a single liquid-cooled battery box 3 are unbalanced;

[0044] In this solution, when the liquid flows along the axis in the left heat exchange channel 10 that penetrates coaxially in the left-handed conversion heat cylinder 14, the flowing liquid pushes the left spiral hydraulic drive blade 12, causing the left-handed conversion heat cylinder 14 to rotate along the axis; when the liquid flows along the axis in the right heat exchange channel 11 that penetrates coaxially in the right-handed conversion heat cylinder 15, the flowing liquid pushes the right spiral hydraulic drive blade 13, causing the right-handed conversion heat cylinder 15 to rotate along the axis; since the flow direction of the liquid flowing in the left-handed conversion heat cylinder 14 is opposite to that in the right heat exchange channel 11, and the spiral direction of the left spiral hydraulic drive blade 12 is opposite to that of the right spiral hydraulic drive blade 13; therefore, the rotation directions of the left-handed conversion heat cylinder 14 and the right-handed conversion heat cylinder 15 are the same, so that the waist-shaped closed-loop uniform heat oil drive belt 16 makes a linear motion along its own extension path under the drive of the left-handed conversion heat cylinder 14 and the right-handed conversion heat cylinder 15; thus, the waist-shaped closed-loop uniform heat oil drive belt 16 drives the uniform heat oil in the liquid-cooled battery box 3 to circulate along the closed-loop path of the waist-shaped closed-loop uniform heat oil flow gap 7 under the action of the liquid viscosity, thereby eliminating the problem that the left and right heat absorption efficiencies in a single liquid-cooled battery box 3 are unbalanced.

[0045] The above is only the preferred implementation mode of the present invention. It should be pointed out that: for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A heat equalizing liquid cooling system for a power battery box array, characterized in that: It includes liquid-cooled battery boxes (3) arranged in a linear array, a cold oil inlet pipe (1), a hot oil outlet pipe (2), and a transition pipe (6); the coolant from the cold oil inlet pipe (1) flows through the left parts of each liquid-cooled battery box (3) in sequence and then flows into one end of the transition pipe (6), and the coolant discharged from the other end of the transition pipe (6) flows through the right parts of each liquid-cooled battery box (3) in sequence and is discharged through the hot oil outlet pipe (2). The transition pipe (6) is at one end of the linear array structure formed by several liquid-cooled battery boxes (3), and both the cold oil inlet pipe (1) and the hot oil outlet pipe (2) are at the other end of the linear array structure formed by several liquid-cooled battery boxes (3).

2. The heat equalizing liquid cooling system for a power battery box array according to claim 1, characterized in that: At one end of the left part of each liquid-cooled battery box (3) close to the cold oil inlet pipe (1) and at one end far from the cold oil inlet pipe (1), an a inlet pipe (4a) and an a outlet pipe (5a) are coaxially and integrally arranged respectively; at one end of the right part of each liquid-cooled battery box (3) far from the hot oil outlet pipe (2) and at one end close to the hot oil outlet pipe (2), a b inlet pipe (4b) and a b outlet pipe (5b) are coaxially and integrally arranged respectively. The a outlet pipe (5a) and the b inlet pipe (4b) of the liquid-cooled battery box (3) closest to the transition pipe (6) among several liquid-cooled battery boxes (3) arranged in a linear array are respectively connected to both ends of the transition pipe (6). The a inlet pipe (4a) and the b outlet pipe (5b) of the liquid-cooled battery box (3) farthest from the transition pipe (6) among several liquid-cooled battery boxes (3) arranged in a linear array are respectively connected to the cold oil inlet pipe (1) and the hot oil outlet pipe (2). Among several liquid-cooled battery boxes (3) arranged in a linear array, except for the two liquid-cooled battery boxes (3) farthest from and closest to the transition pipe (6), the a outlet pipe (5a) and the b inlet pipe (4b) of any liquid-cooled battery box (3) are respectively integrally connected to the a inlet pipe (4a) and the b outlet pipe (5b) of an adjacent liquid-cooled battery box (3) on the side close to the transition pipe (6); the a inlet pipe (4a) and the b outlet pipe (5b) of any liquid-cooled battery box (3) are respectively integrally connected to the a outlet pipe (5a) and the b inlet pipe (4b) of an adjacent liquid-cooled battery box (3) on the side far from the transition pipe (6).

3. The heat equalizing liquid cooling system for a power battery box array according to claim 2, characterized in that: A number of columnar battery cell units (8) are fixedly arranged in an array in the liquid-cooled battery box (3), and uniform hot oil is filled in the gaps (30) between the columnar battery cell units (8) in the liquid-cooled battery box (3), so that all the columnar battery cell units (8) in the liquid-cooled battery box (3) are completely immersed in the uniform hot oil.

4. The heat equalizing type liquid cooling system for a power battery box array according to claim 3, characterized in that: The columnar battery cell units (8) in the liquid-cooled battery box (3) include a number of a columnar battery cell units (8a) and a number of b columnar battery cell units (8b).

5. The homogenizing liquid cooling system for a power battery box array according to claim 4, wherein: A number of a columnar battery cell units (8a) are distributed in a central linear array along the length direction of the liquid-cooled battery box (3). On the left side of the leftmost a columnar battery cell unit (8a) in the linear array of a number of a columnar battery cell units (8a), a left-handed heat exchange cylinder (14) with an axial through hole is arranged in parallel; on the right side of the rightmost a columnar battery cell unit (8a) in the linear array of a number of a columnar battery cell units (8a), a right-handed heat exchange cylinder (15) with an axial through hole is arranged in parallel.

6. The heat equalizing type liquid cooling system for a power battery box array according to claim 5, wherein: The upper and lower ends of the left-handed conversion heat cylinder (14) are respectively rotationally and coaxially connected and fitted with an a liquid outlet pipe (5a) and an a liquid inlet pipe (4a) through a sealed bearing (9); the upper and lower ends of the right-handed conversion heat cylinder (15) are respectively rotationally and coaxially connected and fitted with a b liquid inlet pipe (4b) and a b liquid outlet pipe (5b) through a sealed bearing (9).

7. The heat equalizing liquid cooling system for a power battery box array according to claim 6, characterized in that: The inner wall of the left-handed conversion heat cylinder (14) is spirally provided with left-handed spiral hydraulic driving blades (12). When a liquid flows along the axial direction through the left heat exchange channel (10) that penetrates coaxially inside the left-handed conversion heat cylinder (14), the flowing liquid pushes the left-handed spiral hydraulic driving blades (12), causing the left-handed conversion heat cylinder (14) to rotate along the axis; The inner wall of the right-handed conversion heat cylinder (15) is spirally provided with right-handed spiral hydraulic driving blades (13). When a liquid flows along the axial direction through the right heat exchange channel (11) that penetrates coaxially inside the right-handed conversion heat cylinder (15), the flowing liquid pushes the right-handed spiral hydraulic driving blades (13), causing the right-handed conversion heat cylinder (15) to rotate along the axis.

8. The heat equalizing liquid cooling system for a power battery box array according to claim 7, characterized in that: The spiral direction of the left-handed spiral hydraulic driving blades (12) is opposite to the spiral direction of the right-handed spiral hydraulic driving blades (13); A number of b columnar battery core units (8b) are arranged in a waist-shaped closed-loop surrounding array outside the linear array structure jointly formed by the left-handed conversion heat cylinder (14), the right-handed conversion heat cylinder (15), and a number of a columnar battery core units (8a); A waist-shaped closed-loop uniform heat oil flow gap (7) is formed between the "linear array structure" jointly formed by the left-handed conversion heat cylinder (14), the right-handed conversion heat cylinder (15), and a number of a columnar battery core units (8a) and the "waist-shaped closed-loop surrounding array structure" formed by a number of b columnar battery core units (8b). A waist-shaped closed-loop uniform heat oil driving belt (16) extending along the path of the waist-shaped closed-loop uniform heat oil flow gap (7) is arranged inside the liquid-cooled battery box (3). The inner arc surfaces at both ends of the waist-shaped closed-loop uniform heat oil driving belt (16) are respectively in close contact with the outer cylinder surfaces of the left-handed conversion heat cylinder (14) and the right-handed conversion heat cylinder (15); An a liquid guiding gap (18) is formed between the inner wall surface of the waist-shaped closed-loop uniform heat oil driving belt (16) and the outer walls of each a columnar battery core unit (8a); a b liquid guiding gap (17) is formed between the outer wall surface of the waist-shaped closed-loop uniform heat oil driving belt (16) and the outer walls of each b columnar battery core unit (8b).

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