Battery temperature test fixture

Abstract

The utility model discloses a battery temperature test fixture, which comprises an upper pressing sheet, a lower pressing sheet and a connecting piece, wherein the upper pressing sheet and the lower pressing sheet are used for clamping a battery body; the connecting piece is connected between the upper pressing sheet and the lower pressing sheet; a temperature sensing channel used for containing a temperature sensing wire is formed in the upper pressing piece, a wire outlet of the temperature sensing channel is communicated with the lower surface of the upper pressing piece, and a wire inlet of the temperature sensing channel is communicated with the upper surface or any side face of the upper pressing piece. And a pressing assembly for pressing the temperature sensing wire extending out of the wire outlet to the upper surface of the battery body is arranged in the upper pressing sheet. According to the battery temperature detection clamp provided by the utility model, the temperature sensing channel is arranged, so that the temperature sensing line can collect the temperature of the surface, in contact with the clamp, of the battery body, so that the collection of battery temperature data is more comprehensive, and the accuracy of a battery temperature test result is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of test fixtures, in particular to a battery temperature test fixture. Background Art

[0002] Before lithium-ion batteries are put into use after production, in order to study the safety and electrical properties of the batteries, it is necessary to conduct safety tests and electrical performance tests on the batteries. Cycle testing, as an electrical performance testing method, is an important means of detecting the cycle life of batteries.

[0003] During the cycle test, the lithium-ion battery will produce gas and expand, and even cause interface damage, affecting the battery's cycle performance. Therefore, during the test, it is necessary to use a fixture to clamp the lithium-ion battery. On the one hand, it can inhibit the expansion of the lithium-ion battery during the charge and discharge process. On the other hand, it can also restore the real environment of the lithium-ion battery in the PACK, making the experimental data more real and reliable.

[0004] Among them, square lithium-ion batteries are a type of lithium-ion battery, which has the advantages of simple and reliable packaging, high energy density, and relatively light weight. Due to its characteristics, square lithium-ion batteries have become the preferred monomer for current electric vehicle modules.

[0005] During the test of square lithium-ion batteries, usually only the temperatures of the three sides of the square lithium-ion battery can be monitored, and data analysis is performed later through the temperatures of the three sides. However, since the large surface of the square lithium-ion battery is in direct contact with the fixture, the existing fixture makes it impossible to directly monitor the temperature of the large surface of the square lithium-ion battery, which also makes the large surface temperature missing during the later data analysis, thereby affecting the accuracy of the temperature test results of the square lithium-ion battery.

[0006] In view of this, it is necessary to provide a battery temperature testing fixture that can detect the temperature of the large surface of a square lithium-ion battery. Utility Model Content

[0007] The purpose of the utility model is to overcome the disadvantage of low accuracy of temperature test results of square lithium-ion batteries in the prior art, and to provide a battery temperature test fixture, which provides a temperature sensing channel in the upper pressing plate so that the temperature sensing line can bypass the upper pressing plate and contact the upper surface of the battery body, and provides a clamping assembly that continuously presses the end of the temperature sensing line to the upper surface of the battery body, thereby ensuring that the temperature sensing line continuously contacts the upper surface of the battery body in contact with the upper pressing plate. Under the premise of tightly clamping the battery during the battery test, the temperature of each surface of the battery including the surface in contact with the fixture can be collected, thereby obtaining a more accurate temperature test result.

[0008] The technical solution of the utility model provides a battery temperature test fixture, comprising an upper pressing plate and a lower pressing plate for clamping a battery body and a connecting piece connected between the upper pressing plate and the lower pressing plate;

[0009] The upper pressing plate is provided with a temperature sensing channel for placing a temperature sensing line, the line outlet of the temperature sensing channel is connected to the lower surface of the upper pressing plate, and the line inlet of the temperature sensing channel is connected to the upper surface or any side surface of the upper pressing plate;

[0010] The upper pressing plate is provided with a pressing assembly for pressing the temperature-sensitive wire extending from the wire outlet toward the upper surface of the battery body.

[0011] In one of the optional technical solutions, a mounting through hole is provided on the upper pressing plate, a lower end of the mounting through hole is communicated with the temperature sensing channel, and the clamping assembly is embedded in the mounting through hole.

[0012] In one of the optional technical solutions, the clamping assembly includes a fixed element, an elastic element and a movable element for pressing down the temperature sensitive wire, which are arranged in sequence from top to bottom, the fixed element is fixedly connected to the upper pressure plate, the upper end of the elastic element is connected to the fixed element, and the lower end of the elastic element is connected to the movable element.

[0013] In one of the optional technical solutions, the inner side wall of the mounting through hole has a groove, and the opposite sides of the fixing element are respectively provided with lugs matching the groove, and the lugs are embedded in the groove.

[0014] In one of the optional technical solutions, the clamping assembly also includes a pull rod, the lower end of which is fixedly connected to the movable element, the middle portion of the fixed element has a through hole, the pull rod passes through the through hole, and the upper end of the pull rod is located above the fixed element.

[0015] In one of the optional technical solutions, the upper end of the pull rod is provided with a hand-held portion for the user to hold.

[0016] In one of the optional technical solutions, the hand-held part includes a pull ring, the upper end of the pull rod is provided with a hinged through hole, and the pull ring is partially inserted into the hinged through hole of the pull rod.

[0017] In one of the optional technical solutions, the connecting member includes a connecting bolt and a nut, the upper pressing plate is provided with a first connecting hole, the lower pressing plate is provided with a second connecting hole, one end of the connecting bolt passes through the first connecting hole, the other end of the connecting bolt passes through the second connecting hole, and both ends of the connecting bolt are respectively connected to the nut.

[0018] In one of the optional technical solutions, the upper pressing plate and the lower pressing plate are both rectangular structures, the number of the first connecting holes and the number of the second connecting holes are four, the four first connecting holes are respectively arranged at the four end corners of the upper pressing plate, the four second connecting holes are respectively arranged at the four end corners of the lower pressing plate corresponding to the first connecting holes, and the four connecting bolts are respectively arranged between the first connecting holes and the second connecting holes.

[0019] In one of the optional technical solutions, outer surfaces of the upper pressing plate, the lower pressing plate and the connecting member are respectively covered with an insulating layer.

[0020] The above technical solution has the following beneficial effects:

[0021] The utility model provides a battery temperature test fixture comprising an upper pressing plate, a lower pressing plate and a connecting piece, wherein a temperature sensing channel is creatively provided in the upper pressing plate, so that the temperature sensing line can bypass the obstruction of the upper pressing plate and directly contact the upper surface of the battery body. By providing the temperature sensing channel, the temperature of the battery body surface blocked by the fixture can be collected, and the temperature data of part of the battery surface is no longer missing, so that the temperature collection data during the battery temperature test is more comprehensive, and the accuracy of the battery temperature test result is significantly improved.

[0022] In addition, the battery temperature test fixture provided by the utility model is also provided with a pressing assembly that continuously presses the end of the temperature sensing wire against the upper surface of the battery body, thereby ensuring that the temperature sensing wire continuously contacts the upper surface of the battery body in contact with the upper pressing plate, and ensuring that the temperature sensing wire in the temperature sensing channel accurately collects the temperature of the upper surface of the battery body. During the battery temperature test, while ensuring that the battery body is firmly clamped, the temperature data of all surfaces in the battery body can also be collected, thereby obtaining a more accurate battery temperature test result. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] With reference to the accompanying drawings, the disclosure of the present utility model will become easier to understand. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model.

[0024] In the figure:

[0025] Figure 1 A schematic diagram of a battery temperature test fixture structure provided by an embodiment of the utility model;

[0026] Figure 2 A schematic diagram of a state in which a battery temperature test fixture provided by an embodiment of the utility model releases a temperature sensing line;

[0027] Figure 3 A schematic diagram of a side structure of a battery temperature test fixture provided by an embodiment of the utility model;

[0028] Figure 4 A top view of a battery temperature test fixture provided by an embodiment of the utility model;

[0029] Figure 5 A three-dimensional diagram of a clamping assembly provided in one embodiment of the utility model.

[0030] Reference numerals in the figures:

[0031] 1. Upper pressing plate; 11. Temperature sensing channel; 111. Wire inlet; 112. Wire outlet; 12. Mounting through hole; 121. Groove; 13. First connecting hole;

[0032] 2. Lower pressing plate; 21. Second connecting hole;

[0033] 3. Connecting piece; 31. Connecting bolt; 32. Nut;

[0034] 4. Clamping assembly; 41. Fixing element; 411. Lug; 42. Elastic element; 43. Movable element; 44. Pull rod; 441. Hand-held part;

[0035] 5. Temperature sensing line;

[0036] 6. Battery body. DETAILED DESCRIPTION

[0037] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings. The same parts are represented by the same figure numbers. 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.

[0038] like Figure 1-5 As shown, a battery temperature test fixture provided by an embodiment of the utility model includes an upper pressing plate 1 and a lower pressing plate 2 for clamping a battery body 6 and a connecting piece 3 connected between the upper pressing plate 1 and the lower pressing plate 2. A temperature sensing channel 11 for placing a temperature sensing line 5 is provided in the upper pressing plate 1, and a line outlet 112 of the temperature sensing channel 11 is connected to the lower surface of the upper pressing plate 1, and a line inlet 111 of the temperature sensing channel 11 is connected to the upper surface or any side surface of the upper pressing plate 1. A clamping assembly 4 is provided in the upper pressing plate 1 for pressing the temperature sensing line 5 extending from the line outlet 112 to the upper surface of the battery body 6.

[0039] like Figure 1-4As shown, the upper pressing plate 1 and the lower pressing plate 2 are connected to each other through a connector 3, and there is a gap between the upper pressing plate 1 and the lower pressing plate 2 to form a clamping space, and the battery body 6 that needs to be tested for temperature is completely accommodated in the clamping space, and the battery body 6 is completely clamped in the clamping space. When the battery body 6 that needs to be tested for temperature is a square lithium-ion battery, since the overall structure of the square lithium-ion battery is a rectangular parallelepiped structure, in order to ensure the fastening effect of the battery temperature test fixture on the square lithium-ion battery, the two larger relative surfaces of the side of the square lithium-ion battery are generally selected for clamping, that is, the large surface of the battery. The two large surfaces of the square lithium-ion battery are respectively pressed below the upper pressing plate 1 and above the lower pressing plate 2, wherein the two large surfaces of the square lithium-ion battery are the upper surface and the lower surface of the battery body 6 described in the present technical solution, the upper surface of the battery body 6 is completely covered by the lower surface of the upper pressing plate 1, and the lower surface of the battery body 6 is completely covered by the upper surface of the lower pressing plate 2, thereby achieving fixed clamping of the battery body 6. The battery body 6 here can also be other structures that can be clamped by the upper pressing plate 1 and the lower pressing plate 2. The upper and lower surfaces of the battery body 6 are clamped only to accurately indicate the relative position between the battery body 6 and the battery test fixture, and do not limit the clamped position of the battery body 6. The upper surface and the lower surface of the battery body 6 are also only used as an auxiliary for the orientation description of the technical solution. They are actually the two opposite surfaces of the battery body 6 that are in contact with the upper pressing plate 1 and the lower pressing plate 2, and do not specifically refer to the surface of the battery body 6 facing upward or downward.

[0040] The temperature sensing channel 11 opened in the upper pressing plate 1 is arranged in the upper pressing plate 1, and the temperature sensing channel 11 is integrally formed with the upper pressing plate 1. The two ends of the temperature sensing channel 11 are the inlet and outlet of the temperature sensing line 5, namely, the line inlet 111 and the line outlet 112, wherein one end of the temperature sensing channel 11 is open, namely, the line outlet 112 of the temperature sensing line 5, and is connected to the upper surface of the battery body 6 so that the end of the temperature sensing line 5 can contact the upper surface of the battery body 6; the other end of the temperature sensing channel 11 is open, namely, the line inlet 111 of the temperature sensing line 5, and is opened on the upper surface or any side surface of the upper pressing plate 1, so as to facilitate the temperature sensing line 5 to enter the temperature sensing channel 11 from the outside of the battery test fixture from the entrance and contact the upper surface of the battery body 6. In order to facilitate the insertion of the temperature sensing wire 5 into the temperature sensing channel 11, the width of any section of the temperature sensing channel 11 needs to be greater than the width of any section of the temperature sensing wire 5. Since the end of the temperature sensing wire 5 is used to sense the temperature of the upper surface of the battery body 6, that is, the temperature of the large surface of the battery, the end of the temperature sensing wire 5 may be larger than other parts of the temperature sensing wire 5 due to the need to collect temperature. In this case, the width of each part of the temperature sensing channel 11 is greater than the width of the end of the temperature sensing wire 5. In order to reduce the possibility of bending of the temperature sensing wire 5 in the temperature sensing channel 11, preferably, the wire inlet 111 of the temperature sensing channel 11 is set at a position close to the lower surface of the side of the upper pressing plate 1, and the wire inlet 111 is close to the lower end of the side of the upper pressing plate 1, so that the horizontal height difference between the wire inlet 111 and the wire outlet 112 is small, and the temperature sensing wire 5 can contact the upper surface of the battery body 6 without bending after being inserted into the temperature sensing channel 11.

[0041] The clamping assembly 4 is a component used to clamp the temperature sensing wire 5 extending from the outlet 112 from top to bottom. What actually needs to be clamped is the end of the temperature sensing wire 5 used to collect the temperature of the upper surface of the battery body 6. In order to achieve such an effect, the clamping assembly 4 needs to at least partially extend from the outlet 112 and be fixedly connected to the upper pressing plate 1, and partially be able to move downward relative to the upper pressing plate 1, and continuously press the end of the temperature sensing wire 5 to the upper surface of the battery body 6 through a downward force. To this end, a fixed part, a power part and a movable part, wherein the fixed part can be fixedly connected to the upper pressing plate 1, or can be integrally formed with the upper pressing plate 1, the power part can be an active telescopic mechanism such as a cylinder mechanism, a ball screw mechanism driven by a motor, or an elastic element 42 such as rubber or a spring that can continuously provide pressure, the movable part can not contact any part of the upper pressing plate 1, or can be movably connected to the upper pressing plate 1, the structure of the movable part can effectively cover and clamp the end of the temperature sensing wire 5, and the movable part needs to be able to move upward to release the temperature sensing wire 5.

[0042] The battery temperature test fixture provided by the technical solution includes an upper pressing plate 1, a lower pressing plate 2 and a connecting piece 3, and a temperature sensing channel 11 is creatively provided in the upper pressing plate 1, so that the temperature sensing line 5 can bypass the obstruction of the upper pressing plate 1 and directly contact the upper surface of the battery body 6. By providing the temperature sensing channel 11, the temperature of the surface of the battery body 6 blocked by the fixture can be collected, and the temperature data of part of the battery surface is no longer missing, so that the temperature collection data during the battery temperature test is more comprehensive, and the accuracy of the battery temperature test results is significantly improved.

[0043] In addition, the battery temperature test fixture provided by the technical solution is also provided with a pressing assembly 4 that continuously presses the end of the temperature sensing wire 5 against the upper surface of the battery body 6, thereby ensuring that the temperature sensing wire 5 continuously contacts the upper surface of the battery body 6 in contact with the upper pressing plate 1, and ensuring that the temperature sensing wire 5 in the temperature sensing channel 11 accurately collects the temperature of the upper surface of the battery body 6. During the battery temperature test, on the premise of ensuring that the battery body 6 is firmly clamped, the temperature data of all surfaces in the battery body 6 can also be collected, so that a more accurate battery temperature test result can be obtained.

[0044] In one embodiment, Figure 1-3 As shown, the upper pressing plate 1 is provided with a mounting through hole 12 , the lower end of the mounting through hole 12 is communicated with the temperature sensing channel 11 , and the pressing assembly 4 is embedded in the mounting through hole 12 .

[0045] In this embodiment, the installation through hole 12 is provided in the upper pressing plate 1 to better accommodate the clamping assembly 4, so that the entire clamping assembly 4 does not protrude outside the upper pressing plate 1. The outlet 112 of the temperature sensing channel 11 is opened on the side wall of the installation through hole 12, so that the temperature sensing wire 5 can partially enter the lower end of the installation through hole 12, usually the end of the temperature sensing wire 5 enters the installation through hole 12, and then the temperature sensing part of the temperature sensing wire 5 contacts the upper surface of the battery body 6. By providing the installation through hole 12, the integrity of the clamping assembly 4 and the upper pressing plate 1 can be better, which is convenient for storage, transportation and installation.

[0046] In one embodiment, Figure 5 As shown, the clamping assembly 4 includes a fixed element 41, an elastic element 42 and a movable element 43 for pressing down the temperature-sensitive wire, which are arranged in sequence from top to bottom. The fixed element 41 is fixedly connected to the upper pressing plate 1, the upper end of the elastic element 42 is connected to the fixed element 41, and the lower end of the elastic element 42 is connected to the movable element 43.

[0047] In this embodiment, in order to achieve the effect of continuously pressing the temperature-sensitive wire 5, the clamping assembly 4 uses an elastic element 42 to continuously apply downward pressure to the movable element 43. In this embodiment, the elastic element 42 can be a spring, or an elastic rubber or other elastic object that can automatically reset the movable element 43. The fixed element 41 is fixedly connected to the upper pressing plate 1, specifically fixedly connected in the mounting through hole 12. Of course, the fixed connection only refers to the relative position between the fixed element 41 and the upper pressing plate 1 after the connection, and for the convenience of assembly and disassembly, the connection between the fixed element 41 and the upper pressing plate 1 is detachable. The fixed element 41 can be connected to the side wall of the mounting through hole 12, or it can be connected to the upper surface of the upper pressing plate 1. The movable element 43 can rise or fall in the mounting through hole 12 with the elastic element 42, so as to switch the relative state of the movable element 43 and the temperature-sensitive wire 5 between compression and release. The side of the movable element 43 may be completely out of contact with the inner wall of the mounting hole 12 so as to achieve rising or falling without any resistance. The side of the movable element 43 may also be movably connected with the inner wall of the mounting hole 12. By providing a slide rail on the inner wall of the mounting hole 12 and a slider sleeved on the slide rail on the side of the movable element 43, the inner wall of the mounting hole 12 guides the movement of the movable element 43 to avoid deviation of the moving trajectory of the movable element 43, and the switching of the state of tightening and loosening of the temperature sensing line 5 by the movable element 43 is more reliable.

[0048] In one embodiment, Figure 1-2 As shown, the inner side wall of the mounting through hole 12 has a groove 121 , and opposite sides of the fixing element 41 are respectively provided with lugs 411 matching the groove 121 , and the lugs 411 are embedded in the groove 121 .

[0049] In this embodiment, by providing lugs 411 protruding outward on opposite sides of the fixing element 41, the fixing element 41 can be detachably fastened to the inner wall of the mounting through hole 12. During installation, the fixing element 41 is first tilted so that the lug 411 on one side of the fixing element 41 is inserted into a groove 121, and then the fixing element 41 is gradually leveled so that the lug 411 on the other side of the fixing element 41 is also inserted into the corresponding groove 121, and the positions of the fixing elements 41 on both sides and the mounting through hole 12 are relatively fixed. By providing lugs 411 on both sides of the fixing element 41, the installation between the fixing element 41 and the mounting through hole 12 is reliable and easy to disassemble.

[0050] In one embodiment, Figure 1-3 As shown, the clamping assembly 4 further includes a pull rod 44 , the lower end of which is fixedly connected to the movable element 43 , the middle of the fixed element 41 has a through hole, the pull rod 44 passes through the through hole, and the upper end of the pull rod is located above the fixed element 41 .

[0051] In this embodiment, in order to facilitate the control of the rise or fall of the movable element 43 located inside the mounting through hole 12, a pull rod 44 protruding from the fixed element 41 is connected above the movable element 43, and the rise or fall of the movable element 43 can be controlled by pulling the pull rod 44. The pull rod 44 also passes through the elastic element 42 and does not hinder the state change of the elastic element 42. The provision of the pull rod 44 makes the control of the movable element 43 simple and direct.

[0052] In one embodiment, Figure 1-2 As shown, a hand-held portion 441 is provided at the upper end of the pull rod 44 for the user to hold.

[0053] In this embodiment, in order to prevent the pull rod 44 from being completely retracted below the fixing element 41 and to make it more convenient for the user to control the pull rod 44, a hand-held portion 441 is provided at the upper end of the pull rod 44. The structure of the hand-held portion 441 needs to be convenient for the user to hold and exert force upward, and also needs to be stuck above the through hole in the middle of the fixing element 41. Therefore, the width of the hand-held portion 441 needs to be greater than the diameter of the pull rod 44. The hand-held portion 441 can be a ring structure or a crossbar structure that matches the hand. The hand-held portion 441 is provided to facilitate the user to exert force upward to pull up the pull rod 44.

[0054] In one embodiment, Figure 1-3 As shown, the hand-held portion 441 includes a pull ring, and the upper end of the pull rod 44 is provided with a hinged through hole, and the pull ring portion is inserted into the hinged through hole of the pull rod 44.

[0055] In this embodiment, the structure of the hand-held portion 441 is preferably a pull ring with an annular structure, and the pull ring partially passes through the hinged through hole at the upper end of the pull rod 44, so that the pull ring can rotate around the hinge. When there is no need to pull the pull rod 44, the pull ring can be rotated downward to be stored, or it can be attached to the upper surface of the fixing element 41 to prevent the hand-held portion 441 from causing additional protrusions in the middle part of the upper pressing plate 1, and at the same time prevent the hand-held portion 441 from being damaged due to the upward protrusion during transportation or assembly and disassembly.

[0056] In one embodiment, Figure 1-4 As shown, the connecting member 3 includes a connecting bolt 31 and a nut 32, the upper pressing plate 1 is provided with a first connecting hole 13, the lower pressing plate 2 is provided with a second connecting hole 21, one end of the connecting bolt 31 passes through the first connecting hole 13, the other end of the connecting bolt 31 passes through the second connecting hole 21, and the two ends of the connecting bolt 31 are respectively connected to the nut 32.

[0057] In this embodiment, the connecting member 3 includes a connecting bolt 31 with threads on the whole or both ends, and a nut 32 that matches the connecting bolt 31 and can be screwed onto the bolt. Among them, the first connecting hole 13 and the second connecting hole 21 are both through holes. In order to prevent the nut 32 from protruding from the surface of the upper pressing plate 1 or the lower pressing plate 2, the first connecting hole 13 and the second connecting hole 21 can also be provided with a receiving groove that matches the nut 32. When the nut 32 is screwed on the connecting bolt 31 and tightened, it completely enters the receiving groove. One end of the connecting bolt 31 passes through the first connecting hole 13 of the upper pressing plate 1, and the other end of the connecting bolt 31 passes through the second connecting hole 21 of the lower pressing plate 2. Then, the two ends of the connecting bolt 31 are respectively connected and the nut 32 is screwed until the lower surface of the nut 32 is pressed against the surface of the upper pressing plate 1 or the lower pressing plate 2, so that the upper pressing plate 1 and the lower pressing plate 2 are pressed against each other, and the battery body 6 located between the upper pressing plate 1 and the lower pressing plate 2 is pressed. The connecting member 3 adopts a structure in which a connecting bolt 31 and a nut 32 cooperate with each other, which is convenient to assemble and disassemble and has a stable connection, and has a reliable clamping effect on the battery body 6.

[0058] In one embodiment, Figure 1-4 As shown, the upper pressing plate 1 and the lower pressing plate 2 are both rectangular structures, the number of the first connecting holes 13 and the number of the second connecting holes 21 are both four, the four first connecting holes 13 are respectively arranged at the four end corners of the upper pressing plate 1, the four second connecting holes 21 are respectively arranged at the four end corners of the lower pressing plate 2 corresponding to the first connecting holes 13, and the four connecting bolts 31 are respectively arranged between the first connecting holes 13 and the second connecting holes 21.

[0059] In this embodiment, the four end corners of the upper pressing plate 1 and the lower pressing plate 2 are connected one by one by connecting bolts 31 and nuts 32, so that the positions of the upper pressing plate 1 and the lower pressing plate 2 are completely fixed, and the battery body 6 is fixedly clamped between the upper pressing plate 1 and the lower pressing plate 2. Of course, the upper pressing plate 1 and the lower pressing plate 2 can also be other structures. For example, the upper pressing plate 1 and the lower pressing plate 2 are both circular plate structures, and the plurality of first connection holes 13 are evenly distributed around the periphery of the upper pressing plate 1, and the plurality of second connection holes 21 are evenly distributed around the periphery of the lower pressing plate 2. By completely fixing the periphery of the upper pressing plate 1 and the lower pressing plate 2, the position of the battery body 6 is completely tightened, which is convenient for battery temperature testing.

[0060] In one embodiment, outer surfaces of the upper pressing plate 1 , the lower pressing plate 2 and the connecting member 3 are respectively covered with an insulating layer.

[0061] In this embodiment, since the battery body 6 is continuously powered during the battery temperature test, in order to improve the safety during the test, it is necessary to improve the overall insulation of the battery temperature test fixture. To this end, an insulating layer is coated on part or all of the outer surfaces of the upper pressing plate 1, the lower pressing plate 2 and the connecting piece 3. The insulating layer is made of one of the materials such as polypropylene, polyvinyl chloride, polyimide, polyamide, etc. Of course, other materials suitable for making the insulating layer required in this technical solution can also be used. By providing an insulating layer on the outer surface of the upper pressing plate 1, the lower pressing plate 2 and the connecting piece 3, the battery body 6 is not easy to leak electricity to the outside during the clamping and temperature test, which greatly improves the safety of the battery temperature test.

[0062] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0063] The above are only the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principles of the present invention, several other modifications can be made, which should also be considered as the protection scope of the present invention.

Claims

1. A battery temperature test fixture, characterized in that: It comprises an upper pressing plate (1) and a lower pressing plate (2) for clamping a battery body (6), and a connecting piece (3) connected between the upper pressing plate (1) and the lower pressing plate (2); The upper pressing plate (1) is provided with a temperature sensing channel (11) for placing a temperature sensing line (5); a line outlet (112) of the temperature sensing channel (11) is connected to the lower surface of the upper pressing plate (1); and a line inlet (111) of the temperature sensing channel (11) is connected to the upper surface or any side surface of the upper pressing plate (1); The upper pressing plate (1) is provided with a pressing assembly (4) for pressing the temperature-sensitive wire (5) extending from the wire outlet (112) toward the upper surface of the battery body (6).

2. The battery temperature test fixture according to claim 1, characterized in that: The upper pressing plate (1) is provided with a mounting through hole (12), the lower end of the mounting through hole (12) is communicated with the temperature sensing channel (11), and the pressing assembly (4) is embedded in the mounting through hole (12).

3. The battery temperature test fixture according to claim 2, characterized in that: The clamping assembly (4) comprises a fixed element (41), an elastic element (42) and a movable element (43) for pressing down the temperature-sensitive wire (5) which are arranged in sequence from top to bottom, wherein the fixed element (41) is fixedly connected to the upper pressing plate (1), the upper end of the elastic element (42) is connected to the fixed element (41), and the lower end of the elastic element (42) is connected to the movable element (43).

4. The battery temperature test fixture according to claim 3, characterized in that: The inner side wall of the mounting through hole (12) has a groove (121), and opposite sides of the fixing element (41) are respectively provided with lugs (411) matching the groove (121), and the lugs (411) are embedded in the groove (121).

5. The battery temperature test fixture according to claim 4, characterized in that: The clamping assembly (4) also includes a pull rod (44), the lower end of which is fixedly connected to the movable element (43), the middle portion of the fixed element (41) has a through hole, the pull rod (44) passes through the through hole, and the upper end of the pull rod (44) is located above the fixed element (41).

6. The battery temperature test fixture according to claim 5, characterized in that: The upper end of the pull rod (44) is provided with a hand-holding portion (441) for the user to hold.

7. The battery temperature test fixture according to claim 6, characterized in that: The hand-held portion (441) comprises a pull ring, the upper end of the pull rod (44) is provided with a hinged through hole, and the pull ring portion is inserted into the hinged through hole of the pull rod (44).

8. The battery temperature test fixture according to claim 1, characterized in that: The connecting member (3) comprises a connecting bolt (31) and a nut (32); the upper pressing plate (1) is provided with a first connecting hole (13); the lower pressing plate (2) is provided with a second connecting hole (21); one end of the connecting bolt (31) passes through the first connecting hole (13); the other end of the connecting bolt (31) passes through the second connecting hole (21); and both ends of the connecting bolt (31) are respectively connected to the nut (32).

9. The battery temperature test fixture according to claim 8, characterized in that: The upper pressing plate (1) and the lower pressing plate (2) are both rectangular parallelepiped structures, the number of the first connecting holes (13) and the number of the second connecting holes (21) are both four, the four first connecting holes (13) are respectively arranged at the four end corners of the upper pressing plate (1), the four second connecting holes (21) are respectively arranged at the four end corners of the lower pressing plate (2) corresponding to the first connecting holes (13), and the four connecting bolts (31) are respectively arranged between the first connecting holes (13) and the second connecting holes (21).

10. The battery temperature test fixture according to any one of claims 1 to 9, characterized in that: The outer surfaces of the upper pressing plate (1), the lower pressing plate (2) and the connecting piece (3) are respectively covered with an insulating layer.

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