Large-current test fixture with high heat dissipation performance

Abstract

The utility model provides a high-performance high-current test fixture with heat dissipation, which comprises a bottom plate, a positive electrode test fixture assembly, a negative electrode test fixture assembly, a left side support plate, a right side support plate, a middle support plate and a fixed plate, and is characterized in that the left side support plate and the right side support plate are respectively arranged on two sides of the bottom plate; a middle supporting plate is arranged between the left supporting plate and the right supporting plate, a positive electrode testing clamp assembly is arranged between the left supporting plate and the middle supporting plate, a negative electrode testing clamp assembly is arranged between the right supporting plate and the middle supporting plate, a fixing plate is arranged between the top of the left supporting plate and the top of the right supporting plate, and through holes are formed in the two sides of the fixing plate. The high-current test fixture has the advantages of being simple in structure, convenient to operate, good in high-current test fixture performance, good in compatibility with different batteries, good in heat dissipation effect, capable of well guaranteeing perfect isolation of the positive electrode test fixture and the negative electrode test fixture, capable of testing the temperature of the batteries, capable of protecting the batteries and capable of improving the test efficiency. And the battery is prevented from being damaged by high temperature.

Description

TECHNICAL FIELD

[0001] The utility model relates to a test fixture technical field especially relates to a take heat dissipation high -performance's big current test fixture. BACKGROUND

[0002] With the development of science and technology, the application of lithium battery is widespread in various trades and professions, and lithium battery needs to be tested for performance before being put into use. In today's various performance tests, tab probe or copper sheet clamp must be used to ensure good contact between the test press and the tab.

[0003] In the existing lithium battery test probe or copper sheet clamp, most of them use simple four-bar mechanism to directly press the probe or copper sheet on the tab with fast clamps. Since the clamp has low precision, it is difficult to ensure that the tab is not scratched or elongated, and it is difficult to grasp the compatibility of different batteries.

[0004] With the promotion of new energy, the application of batteries is becoming more and more widespread. Before the battery is shipped, it must go through the testing link. Currently, the clamp used in the testing process of large current battery is prone to heat during the testing process of large current battery, resulting in low testing accuracy, which may damage the battery and the testing clamp, and even cause fire in severe cases.

[0005] Chinese patent CN214750728U is a kind of big current battery test fixture, including adjusting bolt and laminated pressure plate, current plate, elastic voltage plate, insulating bottom plate;The pressure plate, current plate, elastic voltage plate are provided with vertical through hole, the adjusting bolt is connected with insulating bottom plate after penetrating the vertical through hole, the adjusting bolt is used for adjusting the distance between pressure plate, current plate, elastic voltage plate, to realize the clamping or loosening of the positive and negative pole of the battery core of the measured battery. It is convenient and fast to install and use the big current battery test fixture, which can effectively improve the testing efficiency of the battery;Increase the current contact area between the clamp and the positive and negative pole of the battery core of the measured battery, reduce the impedance, reduce the heat, improve the testing stability and testing precision.

[0006] In the production of batteries, the large current test of the product is one of the necessary detection items, and the existing detection method is usually carried out by artificial clamping and detection one by one. This detection method has high labor intensity, unreliable detection results, low data accuracy and low detection efficiency. SUMMARY

[0007] The utility model discloses a novel high-performance large current test fixture with heat dissipation, which has simple structure, convenient operation, good performance, good compatibility for different batteries, good heat dissipation effect, perfect isolation between the positive test fixture and the negative test fixture, low test temperature rise, and protection for the battery to avoid damage caused by high temperature during testing.

[0008] The utility model discloses a following technical scheme to realize:

[0009] A kind of high-performance large current test fixture with heat dissipation, including bottom plate, positive test fixture assembly, negative test fixture assembly, left side support plate, right side support plate, middle support plate, fixed plate, the bottom plate both sides are respectively equipped with left side support plate, right side support plate, middle support plate is equipped between the left side support plate and the right side support plate, positive test fixture assembly is equipped between the left side support plate and the middle support plate, negative test fixture assembly is equipped between the right side support plate and the middle support plate, fixed plate is equipped between the left side support plate and the right side support top, the fixed plate both sides are equipped with through-hole.

[0010] As further, the positive test fixture assembly includes positive elbow clamp component, positive elbow clamp connecting plate, plug screw post, positive guide rod, positive upper test fixture component, positive lower current plate, positive radiator, positive voltage down pressure plate, the positive elbow clamp component is installed in the through-hole of the fixed plate left side, the positive elbow clamp connecting rod of the positive elbow clamp component is connected with the positive elbow clamp connecting plate, the positive elbow clamp connecting plate is connected with the positive upper test fixture component by plug screw post, one end of the positive guide rod is connected with the positive elbow clamp connecting plate, the other end of the positive guide rod is connected with the positive lower current plate, the positive lower current plate bottom is adhered together with the positive radiator by heat-conducting adhesive, the positive radiator is installed in the bottom plate left side, the positive voltage down pressure plate is equipped behind the positive radiator, the positive elbow clamp component drives positive elbow clamp connecting plate to move up and down on positive guide rod, and positive elbow clamp connecting plate drives positive upper electric test fixture component to move downwards, and positive upper electric test fixture component is pressed and contacted with the positive lower current plate.

[0011] As further, the positive elbow clamp component includes positive elbow clamp fixed seat, positive elbow clamp handle, positive elbow clamp connecting rod, positive elbow clamp fixed plate, the positive elbow clamp handle is connected with the positive elbow clamp fixed seat by positive elbow clamp fixed plate, one end of the positive elbow clamp connecting rod is connected with the positive elbow clamp fixed plate, the other end of the positive elbow clamp connecting rod is connected with the positive elbow clamp connecting plate by passing through the through-hole of fixed plate left side, and is locked on the fixed plate left side by nut.

[0012] As further, the positive electrode upper electricity test fixture component includes a positive electrode upper electricity insulation pressing plate, a positive electrode upper electricity sampling sheet, a positive electrode upper electricity voltage insulation sheet, and a positive electrode upper electricity current plate. The positive electrode upper electricity insulation pressing plate is connected to the positive electrode elbow clamp connecting plate through a plug screw column. The positive electrode upper electricity insulation pressing plate is internally provided with a cavity. The positive electrode upper electricity sampling sheet is embedded in the cavity inside the positive electrode upper electricity insulation pressing plate. The positive electrode upper electricity voltage insulation sheet is provided below the positive electrode upper electricity sampling sheet. The positive electrode upper electricity current plate is provided below the positive electrode upper electricity voltage insulation sheet. The positive electrode upper electricity insulation pressing plate seamlessly docks and clamps the positive electrode upper electricity sampling sheet and the positive electrode upper electricity voltage insulation sheet on the positive electrode upper electricity current plate. The positive electrode upper electricity sampling sheet is pressed and contacted with the positive electrode voltage lower pressing plate.

[0013] As further, the negative electrode test fixture assembly includes a negative electrode elbow clamp component, a negative electrode elbow clamp connecting plate, a plug screw column, a negative electrode guide rod, a negative electrode upper electricity test fixture component, a negative electrode lower electricity current plate, a negative electrode heat sink, and a negative electrode voltage lower pressing plate. The negative electrode elbow clamp component is installed in the through hole on the right side of the fixed plate. The negative electrode elbow clamp connecting rod of the negative electrode elbow clamp component is connected to the negative electrode elbow clamp connecting plate. The negative electrode elbow clamp connecting plate is connected to the negative electrode upper electricity test fixture component through a plug screw column. One end of the negative electrode guide rod is connected to the negative electrode elbow clamp connecting plate. The other end of the negative electrode guide rod is connected to the negative electrode lower electricity current plate. The negative electrode lower electricity current plate is adhered to the negative electrode heat sink through heat-conducting adhesive at the bottom. The negative electrode heat sink is installed on the right side of the bottom plate. The negative electrode heat sink is provided with a negative electrode voltage lower pressing plate at the back. The negative electrode elbow clamp component drives the positive electrode elbow clamp connecting plate to move up and down on the negative electrode guide rod. The negative electrode elbow clamp connecting plate drives the negative electrode upper electricity test fixture component to move downward. The negative electrode upper electricity test fixture component is pressed and contacted with the negative electrode lower electricity current plate.

[0014] As further, the negative electrode elbow clamp component includes a negative electrode elbow clamp fixed seat, a negative electrode elbow clamp handle, a negative electrode elbow clamp connecting rod, and a negative electrode elbow clamp fixed plate. The negative electrode elbow clamp handle is connected to the negative electrode elbow clamp fixed seat through the negative electrode elbow clamp fixed plate. One end of the negative electrode elbow clamp connecting rod is connected to the negative electrode elbow clamp fixed plate. The other end of the negative electrode elbow clamp connecting rod passes through the through hole on the right side of the fixed plate and is connected to the negative electrode elbow clamp connecting plate. The negative electrode elbow clamp connecting rod is locked on the right side of the fixed plate through a nut.

[0015] As further, the positive electrode upper current plate middle part is equipped with a heat dissipation groove.

[0016] As further, the left side support plate, the right side support plate and the middle support plate lower part or middle part are equipped with heat dissipation ventilation openings.

[0017] As further, the positive electrode upper current plate middle part is equipped with a heat dissipation groove.

[0018] As further, the negative electrode upper current plate middle part is equipped with a heat dissipation groove.

[0019] The beneficial effects of the utility model lie in:

[0020] (1) simple structure, convenient operation, large current test fixture performance is good, the compatibility of different batteries is good, the heat dissipation effect is good, and the perfect isolation of the positive electrode test fixture and the negative electrode test fixture is better ensured;

[0021] (2) the large current test fixture pressing adopts the use of quick manual elbow clamp and guide rod, and the operation is simple and stable in work;

[0022] (3) the positive electrode upper test fixture part is equipped with a positive electrode upper electric sampling sheet, the positive electrode upper electric sampling sheet and the positive electrode voltage lower pressing plate are mutually pressed and contacted, the test temperature rise is low, the battery is protected, and the battery is prevented from being damaged by high temperature generated by test;Or the negative electrode upper test fixture part is equipped with a negative electrode upper electric sampling sheet, the negative electrode upper electric sampling sheet and the negative electrode voltage lower pressing plate are mutually pressed and contacted, the test temperature rise is low, the battery is protected, and the battery is prevented from being damaged by high temperature generated by test;

[0023] (4) the quick manual elbow clamp and the action of the positive electrode upper test fixture part and the negative electrode upper test fixture part are controlled, manpower is saved, the clamping force is large, the detection precision is high, and the automation or semi-automation operation is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 It is high-performance large current test fixture structure schematic diagram of the utility model with heat dissipation;

[0025] Fig. 2 It is the explosion structure schematic view of the high-performance large current test fixture with heat dissipation of the utility model;

[0026] Fig. 3 It is the explosion structure schematic view of the positive test fixture assembly of the utility model;

[0027] Fig. 4 It is the explosion structure schematic view of the positive test fixture assembly of the utility model;

[0028] Fig. 5 It is the explosion structure schematic view of the positive test fixture assembly of the utility model;

[0029] Fig. 6 It is the explosion structure schematic view of the positive test fixture assembly of the utility model;

[0030] Fig. 1, bottom plate; 2, positive test fixture assembly; 21, positive elbow clamp component; 210, positive elbow clamp fixed seat; 211, positive elbow clamp handle; 212, positive elbow clamp connecting rod; 213, positive elbow clamp fixed plate; 22, positive elbow clamp connecting plate; 23, plug-in stud; 24, positive guide rod; 25, positive upper power test fixture component; 250, positive upper power insulation pressing plate; 251, positive upper power sampling sheet; 252, positive upper power insulation sheet; 253, positive current plate; 2530, heat dissipation groove; 26, positive lower current plate; 27, positive heat sink; 28, positive voltage lower pressing plate; 3, negative test fixture assembly; 31, negative elbow clamp component; 310, negative elbow clamp fixed seat; 311, negative elbow clamp handle; 312, negative elbow clamp connecting rod; 313, negative elbow clamp fixed plate; 32, negative elbow clamp connecting plate; 33, plug-in stud; 34, negative guide rod; 35, negative upper power test fixture component; 350, negative upper power insulation pressing plate; 351, negative upper power sampling sheet; 352, negative upper power insulation sheet; 353, negative upper current plate; 36, negative lower current plate; 37, negative heat sink; 38, negative voltage lower pressing plate; 4, left side support plate; 5, right side support plate; 6, middle support plate; 7, fixed plate; 71, through hole. DETAILED DESCRIPTION

[0031] The application will be further described below in combination with the drawings and specific embodiments:

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use herein of terms such as "comprise", "have" and "include" or variations such as "comprises", "comprising", "containing", "having" and "includes" are intended to be open-ended. The use of terms such as "first", "second" and "third" with respect to various objects is used merely for distinguishing between different objects and does not imply a particular order or a required sequence.

[0033] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same

[0034] With reference to the drawings, in which: Figs. 1-2 A high-performance large-current test clamp with heat dissipation includes a bottom plate 1, a positive test clamp assembly 2, a negative test clamp assembly 3, a left side support plate 4, a right side support plate 5, a middle support plate 6, and a fixed plate 7. The left side support plate 4 and the right side support plate 5 are respectively arranged on both sides of the bottom plate 1. The middle support plate 6 is arranged between the left side support plate 4 and the right side support plate 5. The positive test clamp assembly 2 is arranged between the left side support plate 4 and the middle support plate 6. The negative test clamp assembly 3 is arranged between the right side support plate 5 and the middle support plate 6. The fixed plate 7 is arranged between the top of the left side support plate 4 and the right side support plate 5. The fixed plate 7 is provided with through holes 71 on both sides.

[0035] With reference to the drawings, in which: Figs. 3-4As shown, the positive electrode test fixture assembly 2 includes a positive electrode elbow clamp component 21, a positive electrode elbow clamp connecting plate 22, a punch stud 23, a positive electrode guide rod 24, a positive electrode upper electrical test fixture component 25, a positive electrode lower current plate 26, a positive electrode heat sink 27, and a positive electrode voltage down plate 28. The positive electrode elbow clamp component 21 is installed in the through hole 71 on the left side of the fixed plate 7. The positive electrode elbow clamp connecting rod 212 of the positive electrode elbow clamp component 21 is connected to the positive electrode elbow clamp connecting plate 22. The positive electrode elbow clamp connecting plate 22 is connected to the positive electrode upper electrical test fixture component 25 through the punch stud 23. One end of the positive electrode guide rod 24 is connected to the positive electrode elbow clamp connecting plate 22, and the other end of the positive electrode guide rod 24 is connected to the positive electrode lower current plate 26. The positive electrode lower current plate 26 is adhered to the positive electrode heat sink 27 through thermal conductive adhesive. The positive electrode heat sink 27 is installed on the left side of the bottom plate 1. The positive electrode heat sink 27 is provided with the positive electrode voltage down plate 28 at the back. The positive electrode elbow clamp component 21 drives the positive electrode elbow clamp connecting plate 22 to move up and down on the positive electrode guide rod 24. The positive electrode elbow clamp connecting plate 22 drives the positive electrode upper electrical test fixture component 25 to move downward. The positive electrode upper electrical test fixture component 25 is pressed and contacted with the positive electrode lower current plate 26.

[0036] As preferably, the positive electrode elbow clamp component 21 includes a positive electrode elbow clamp fixed seat 210, a positive electrode elbow clamp handle 211, a positive electrode elbow clamp connecting rod 212, and a positive electrode elbow clamp fixed plate 213. The positive electrode elbow clamp handle 211 is connected to the positive electrode elbow clamp fixed seat 210 through the positive electrode elbow clamp fixed plate 213. One end of the positive electrode elbow clamp connecting rod 212 is connected to the positive electrode elbow clamp fixed plate 213. The other end of the positive electrode elbow clamp connecting rod 212 passes through the through hole 71 on the left side of the fixed plate 7 and is connected to the positive electrode elbow clamp connecting plate 22, and is locked on the left side of the fixed plate 7 through a nut.

[0037] As preferably, the positive electrode upper electrical test fixture component 25 includes a positive electrode upper electrical insulation pressing plate 250, a positive electrode upper electrical sampling sheet 251, a positive electrode upper electrical voltage insulation sheet 252, and a positive electrode upper electrical current plate 253. The positive electrode upper electrical insulation pressing plate 250 is connected to the positive electrode elbow clamp connecting plate 22 through the punch stud 23. The positive electrode upper electrical insulation pressing plate 250 is internally provided with a cavity. The positive electrode upper electrical sampling sheet 251 is embedded in the cavity inside the positive electrode upper electrical insulation pressing plate 250. The positive electrode upper electrical voltage insulation sheet 252 is provided below the positive electrode upper electrical sampling sheet 251. The positive electrode upper electrical current plate 253 is provided below the positive electrode upper electrical voltage insulation sheet 252. The positive electrode upper electrical sampling sheet 251, the positive electrode upper electrical voltage insulation sheet 252, and the positive electrode upper electrical current plate 253 are seamlessly docked and clamped on the positive electrode upper electrical current plate 253. The positive electrode upper electrical sampling sheet 251 is pressed and contacted with the positive electrode voltage down plate 28.

[0038] As shown in FIG. 1, the positive electrode test fixture assembly 2 is installed on the left side of the bottom plate 1.Figs. 5-6 As shown, the negative electrode test fixture assembly 3 includes a negative electrode elbow clamp component 31, a negative electrode elbow clamp connecting plate 32, a punch pin stud 33, a negative electrode guide rod 34, a negative electrode upper electrical test fixture component 35, a negative electrode lower current plate 36, a negative electrode heat sink 37, and a negative electrode voltage pressing plate 38. The negative electrode elbow clamp component 31 is installed in the through hole 71 on the right side of the fixed plate 7. The negative electrode elbow clamp connecting rod 312 of the negative electrode elbow clamp component 31 is connected to the negative electrode elbow clamp connecting plate 32. The negative electrode elbow clamp connecting plate 32 is connected to the negative electrode upper electrical test fixture component 35 through the punch pin stud 33. One end of the negative electrode guide rod 34 is connected to the negative electrode elbow clamp connecting plate 32, and the other end of the negative electrode guide rod 34 is connected to the negative electrode lower current plate 36. The negative electrode lower current plate 36 is adhered to the negative electrode heat sink 37 through thermal conductive adhesive. The negative electrode heat sink 37 is installed on the right side of the bottom plate 1. The negative electrode heat sink 37 is provided with a negative electrode voltage pressing plate 38 at the back. The negative electrode elbow clamp component 31 drives the negative electrode elbow clamp connecting plate 32 to move up and down on the negative electrode guide rod 34, and the negative electrode elbow clamp connecting plate 32 drives the negative electrode upper electrical test fixture component 35 to move downward. The negative electrode upper electrical test fixture component 35 is pressed and contacted with the negative electrode lower current plate 36.

[0039] As preferably, the negative electrode elbow clamp component 31 includes a negative electrode elbow clamp fixing seat 310, a negative electrode elbow clamp handle 311, a negative electrode elbow clamp connecting rod 312, and a negative electrode elbow clamp fixing plate 313. The negative electrode elbow clamp handle 311 is connected to the negative electrode elbow clamp fixing seat 310 through the negative electrode elbow clamp fixing plate 313. One end of the negative electrode elbow clamp connecting rod 312 is connected to the negative electrode elbow clamp fixing plate 313. The other end of the negative electrode elbow clamp connecting rod 312 is connected to the negative electrode elbow clamp connecting plate 32 through the through hole 71 on the right side of the fixed plate 7, and is locked on the right side of the fixed plate 7 through a nut.

[0040] As preferably, the negative electrode upper electrical test fixture component 35 includes a negative electrode upper electrical insulation pressing plate 350, a negative electrode upper electrical sampling sheet 351, a negative electrode upper electrical voltage insulation sheet 352, and a negative electrode upper electrical current plate 353. The negative electrode upper electrical insulation pressing plate 350 is connected to the negative electrode elbow clamp connecting plate 32 through the punch pin stud 33. The negative electrode upper electrical insulation pressing plate 350 is internally provided with a cavity. The negative electrode upper electrical sampling sheet 351 is embedded in the cavity inside the negative electrode upper electrical insulation pressing plate 350. The negative electrode upper electrical voltage insulation sheet 352 is provided below the negative electrode upper electrical sampling sheet 351. The negative electrode upper electrical current plate 353 is provided below the negative electrode upper electrical voltage insulation sheet 351. The negative electrode upper electrical insulation pressing plate 350 seamlessly docks and clamps the negative electrode upper electrical sampling sheet 351 and the negative electrode upper electrical voltage insulation sheet 352 on the negative electrode upper electrical current plate 353. The negative electrode upper electrical voltage sampling sheet 351 is pressed and contacted with the negative electrode voltage pressing plate 38.

[0041] Preferably, the left support plate 4, the right support plate 5 and the middle support plate 6 are provided with heat dissipation vents in the lower or middle part.

[0042] Preferably, the positive current plate 253 is provided with a heat dissipation groove 2530 in the middle part.

[0043] Preferably, the negative current plate 353 is provided with a heat dissipation groove 3530 in the middle part.

[0044] According to the disclosure and teaching of the above description, the skilled in the art of the present application can also make appropriate changes and modifications to the above embodiments. Therefore, the present application is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the present application should fall within the protection scope of the claims of the present application. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the present application.

Claims

1. A high-current test fixture with heat dissipation and high performance, characterized in that: The utility model provides a battery test fixture, including bottom plate, positive pole test fixture assembly, negative pole test fixture assembly, left side support plate, right side support plate, middle support plate, fixed plate, both sides of bottom plate are equipped with left side support plate, right side support plate respectively, be equipped with middle support plate between left side support plate with right side support plate, be equipped with positive pole test fixture assembly between left side support plate with middle support plate, be equipped with negative pole test fixture assembly between right side support plate with middle support plate, be equipped with fixed plate between left side support plate with right side support top, both sides of fixed plate are equipped with through -hole.

2. The high-performance large-current test fixture with heat dissipation according to claim 1, characterized in that: The positive pole test fixture assembly includes a positive pole elbow clamp component, a positive pole elbow clamp connecting plate, a punching stud, a positive pole guide rod, a positive pole upper electrical test clamp component, a positive pole lower current plate, a positive pole heat sink, and a positive pole voltage pressing plate. The positive pole elbow clamp component is installed in the through-hole on the left side of the fixed plate. The positive pole elbow clamp connecting rod of the positive pole elbow clamp component is connected with the positive pole elbow clamp connecting plate. The positive pole elbow clamp connecting plate is connected with the positive pole upper electrical test clamp component through the punching stud. One end of the positive pole guide rod is connected with the positive pole elbow clamp connecting plate, and the other end of the positive pole guide rod is connected with the positive pole lower current plate. The positive pole lower current plate is adhered to the positive pole heat sink through heat-conducting adhesive. The positive pole heat sink is installed on the left side of the bottom plate. The positive pole heat sink is provided with a positive pole voltage pressing plate at the back. The positive pole elbow clamp component drives the positive pole elbow clamp connecting plate to move up and down on the positive pole guide rod. The positive pole elbow clamp connecting plate drives the positive pole upper electrical test clamp component to move downward. The positive pole upper electrical test clamp component is pressed and contacted with the positive pole lower current plate.

3. The high-performance large-current test fixture with heat dissipation according to claim 2, characterized in that: The positive pole elbow clamp component includes a positive pole elbow clamp fixing seat, a positive pole elbow clamp handle, a positive pole elbow clamp connecting rod, and a positive pole elbow clamp fixing plate. The positive pole elbow clamp handle is connected with the positive pole elbow clamp fixing seat through the positive pole elbow clamp fixing plate. One end of the positive pole elbow clamp connecting rod is connected with the positive pole elbow clamp fixing plate. The other end of the positive pole elbow clamp connecting rod is connected with the positive pole elbow clamp connecting plate through the through-hole on the left side of the fixed plate and is locked on the left side of the fixed plate through a nut.

4. The high-performance large-current test fixture with heat dissipation according to claim 2, characterized in that: The positive pole upper electrical test clamp component includes a positive pole upper electrical insulation pressing plate, a positive pole upper electrical sampling sheet, a positive pole upper voltage insulation sheet, and a positive pole upper current plate. The positive pole upper electrical insulation pressing plate is connected with the positive pole elbow clamp connecting plate through the punching stud. The positive pole upper electrical insulation pressing plate is internally provided with a cavity. The positive pole upper electrical sampling sheet is embedded in the cavity in the positive pole upper electrical insulation pressing plate. The positive pole upper voltage insulation sheet is arranged below the positive pole upper electrical sampling sheet. The positive pole upper current plate is arranged below the positive pole upper voltage insulation sheet. The positive pole upper electrical sampling sheet, the positive pole upper voltage insulation sheet, and the positive pole upper current plate are seamlessly docked and clamped on the positive pole upper electrical sampling sheet. The positive pole upper electrical sampling sheet is pressed and contacted with the positive pole voltage pressing plate.

5. The high-performance large-current test fixture with heat dissipation according to claim 1, characterized in that: The negative electrode test fixture assembly comprises a negative electrode elbow clamp component, a negative electrode elbow clamp connecting plate, a punch stud, a negative electrode guide rod, a negative electrode upper electrical test fixture component, a negative electrode lower current plate, a negative electrode heat sink, and a negative electrode voltage pressing plate. The negative electrode elbow clamp component is installed in the through hole on the right side of the fixed plate. The negative electrode elbow clamp connecting rod of the negative electrode elbow clamp component is connected with the negative electrode elbow clamp connecting plate. The negative electrode elbow clamp connecting plate is connected with the negative electrode upper electrical test fixture component through the punch stud. One end of the negative electrode guide rod is connected with the negative electrode elbow clamp connecting plate, and the other end of the negative electrode guide rod is connected with the negative electrode lower current plate. The negative electrode lower current plate is adhered to the negative electrode heat sink through heat-conducting adhesive. The negative electrode heat sink is installed on the right side of the bottom plate. The negative electrode heat sink is provided with the negative electrode voltage pressing plate at the back. The negative electrode elbow clamp component drives the positive electrode elbow clamp connecting plate to move up and down on the negative electrode guide rod. The negative electrode elbow clamp connecting plate drives the negative electrode upper electrical test fixture component to move downward. The negative electrode upper electrical test fixture component is pressed and contacted with the negative electrode lower current plate.

6. The high-performance large-current test fixture with heat dissipation according to claim 5, characterized in that: The negative electrode elbow clamp component comprises a negative electrode elbow clamp fixing seat, a negative electrode elbow clamp handle, a negative electrode elbow clamp connecting rod, and a negative electrode elbow clamp fixing plate. The negative electrode elbow clamp handle is connected with the negative electrode elbow clamp fixing seat through the negative electrode elbow clamp fixing plate. One end of the negative electrode elbow clamp connecting rod is connected with the negative electrode elbow clamp fixing plate. The other end of the negative electrode elbow clamp connecting rod is connected with the negative electrode elbow clamp connecting plate through the through hole on the right side of the fixed plate and is locked on the right side of the fixed plate through a nut.

7. The high-performance large-current test fixture with heat dissipation according to claim 5, characterized in that: The negative electrode upper electrical test fixture component comprises a negative electrode upper electrical insulation pressing plate, a negative electrode upper electrical sampling sheet, a negative electrode upper electrical voltage insulation sheet, and a negative electrode upper electrical current plate. The negative electrode upper electrical insulation pressing plate is connected with the negative electrode elbow clamp connecting plate through the punch stud. The negative electrode upper electrical insulation pressing plate is internally provided with a cavity. The negative electrode upper electrical sampling sheet is embedded in the cavity in the negative electrode upper electrical insulation pressing plate. The negative electrode upper electrical voltage insulation sheet is arranged below the negative electrode upper electrical sampling sheet. The negative electrode upper electrical current plate is arranged below the negative electrode upper electrical voltage insulation sheet. The negative electrode upper electrical insulation pressing plate seamlessly docks and clamps the negative electrode upper electrical sampling sheet and the negative electrode upper electrical voltage insulation sheet on the negative electrode upper electrical current plate. The negative electrode upper electrical voltage sampling sheet is pressed and contacted with the negative electrode voltage pressing plate.

8. The high-performance large-current test fixture with heat dissipation according to claim 1, characterized in that: The left side support plate, the right side support plate, and the middle support plate are provided with heat dissipation vents at the lower part or the middle part.

9. The high-performance large-current test fixture with heat dissipation according to claim 4, characterized in that: The positive electrode upper current plate is provided with a heat dissipation groove in the middle part.

10. The high-performance large-current test fixture with heat dissipation according to claim 7, characterized in that: The negative electrode upper current plate is provided with a heat dissipation groove in the middle part.

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