Battery measuring device

Abstract

The utility model provides a battery measuring device, which comprises a body and measuring platforms uniformly distributed on two sides of the body, a plurality of measuring lines are uniformly distributed on the measuring platforms in parallel, and each measuring line comprises a bottom contact port, a top contact port and a battery fixing mechanism located between the bottom contact port and the top contact port. The bottom contact port and the top contact port are electrically connected with the body. All the bottom contact ports are provided with a common fixing strip, and elastic pieces are arranged between the fixing strip and the bottom contact ports. All the top contact ports are provided with a common movable strip, the movable strip is movably connected with the measuring platform, and the moving direction of the movable strip is parallel to the length direction of the measuring line. The battery measuring device has the following beneficial effects that the bottom contact port with the elastic piece is matched with the top contact port capable of moving simultaneously, so that the technical problem of high difficulty in controlling the pressing force in the existing battery measuring device is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a battery measuring device. Background Art

[0002] The lithium battery charge and discharge aging cabinet (also often called a grading cabinet) in the battery measuring device is a device dedicated to the performance test and grading of lithium batteries.

[0003] The battery measuring device adopts a high-precision power management system, which can accurately control the charge and discharge of single or multiple strings of lithium batteries and simulate the usage scenarios under various working conditions. For example, they can set multiple charge and discharge rates and perform multi-stage cycle tests to comprehensively evaluate key performance indicators such as the capacity, cycle life, and internal resistance change of the battery. To ensure the accuracy and repeatability of the test.

[0004] However, in practical applications, a common technical challenge involves the pressing problem of the battery connection port. The battery test device needs to establish a reliable electrical connection with the battery through the port, and the control of the pressing force is particularly crucial in this process. Since battery joint testing usually involves a large number of batteries, the difficulty of controlling the pressing force of the port is increased. If the pressing force is insufficient, it may lead to an increase in contact resistance. In severe cases, the battery may not be successfully connected, resulting in test interruption or result deviation, affecting the accurate evaluation of the battery performance. While an excessive pressing force can ensure good conductivity, it may cause physical damage to the battery port or connector under long-term action, such as deformation, wear, and even fracture, shortening the service life of the test equipment and the battery itself.

[0005] At present, such situations basically do not occur in the battery measuring devices on the market within one year, but the pressing force is prone to getting out of control after more than one year. This may be caused by port wear and deformation, or it may also be caused by the deformation of the pressing force device. Summary of the Utility Model

[0006] In view of the deficiencies in the prior art, the utility model provides a battery measuring device, which solves the technical problem of high difficulty in controlling the pressing force existing in the existing battery measuring devices.

[0007] A battery measuring device according to an embodiment of the utility model includes a main body and measuring platforms evenly distributed on both sides of the main body. A plurality of measuring lines are evenly distributed in parallel on the measuring platforms. The measuring line includes a bottom contact port, a top contact port, and a battery fixing mechanism located between the bottom contact port and the top contact port. The bottom contact port and the top contact port are respectively electrically connected to the main body;

[0008] All the bottom contact ports are provided with a common fixing bar, and an elastic member is arranged between the fixing bar and the bottom contact ports;

[0009] All the top contact ports are provided with a common movable bar, the movable bar is movably connected to the measurement platform, and the moving direction of the movable bar is parallel to the length direction of the measurement line.

[0010] The technical principle of the present utility model is as follows: all the batteries are successively snapped onto the battery fixing mechanism of the measurement line, then the movable bar is pushed close to the bottom contact port until the bottom of the battery abuts against the bottom contact port and the top of the battery abuts against the top contact port, and then pushed a little further to deform the elastic member, and then the detection can be carried out.

[0011] Compared with the prior art, the present utility model has the following beneficial effects: by means of the bottom contact port with an elastic member in cooperation with the top contact port that can move simultaneously, it solves the technical problem of high difficulty in controlling the pressing force in the existing battery measurement device.

[0012] Further, both the bottom contact port and the top contact port include an insulating part and a metal part, the metal parts all penetrate through the fixing bar or the movable bar and are close to the side of the battery fixing mechanism, and the insulating part is connected to the fixing bar or the movable bar.

[0013] Further, the fixing bar is evenly provided with movable mounting holes, the insulating part of the bottom contact port is stuck in the movable mounting holes, the cross section of the fixing bar is a U-shaped structure, the elastic member is inside the fixing bar, one end of the elastic member closely adheres to the inner side wall of the fixing bar, and the other end of the elastic member closely adheres to the insulating part of the bottom contact port.

[0014] Further, a through hole is arranged at the position where the fixing bar is in close contact with the elastic member, and the through hole is used for the electrical connection between the bottom contact port and the body.

[0015] Further, a strip-shaped groove is arranged on the measurement platform, the length direction of the strip-shaped groove is consistent with the length direction of the measurement line, a movable bolt is arranged on the movable bar, the movable bolt penetrates through the movable bar and is connected to the measurement platform through the strip-shaped groove, and the insulating part of the top contact port is fixed on the movable bar.

[0016] The movable bar drives all the top contact ports to move synchronously.

[0017] Further, the battery fixing mechanism includes two arc-shaped clamping blocks and a clamping shaft, one ends of the two arc-shaped clamping blocks are hinged by the clamping shaft, a torsion spring is also arranged at the clamping shaft, and both ends of the clamping shaft are installed on the measurement platform.

[0018] Ensure that the battery cannot be easily detached from the battery fixing mechanism, and with this structure, it can ensure that batteries with different diameters can be well fixed.

[0019] Further, two convex blocks are provided at both ends of the clamping shaft, and the convex blocks are fixed on the measurement platform. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the battery measurement device according to an embodiment of the present invention.

[0021] Figure 2 It is a schematic structural diagram of the measurement platform according to an embodiment of the present invention.

[0022] Figure 3 It is a cross-sectional view of the fixing strip according to an embodiment of the present invention.

[0023] Figure 4 It is a cross-sectional view of the movable strip according to an embodiment of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the battery fixing mechanism according to an embodiment of the present invention.

[0025] Figure 6 It is a sectional view of the battery fixing mechanism according to an embodiment of the present invention.

[0026] In the above-mentioned drawings: 10, body; 11, wire; 20, measurement platform; 21, measurement line; 22, strip-shaped groove; 30, bottom contact port; 31, insulating part; 32, metal part; 40, top contact port; 50, battery fixing mechanism; 51, arc-shaped clamping block; 52, clamping shaft; 53, convex block; 60, fixing strip; 61, movable mounting hole; 62, through hole; 70, elastic member; 80, movable strip; 81, movable bolt. Detailed Embodiments

[0027] The technical solutions in the present invention will be further described below in conjunction with the drawings and embodiments.

[0028] As Figure 1-2 shown in the battery measurement device, it includes a body 10 and measurement platforms 20 evenly distributed on both sides of the body 10. Among them, a number of measurement lines 21 are evenly distributed in parallel on the measurement platform 20 to realize simultaneous measurement of multiple batteries. The measurement line 21 includes a bottom contact port 30, a top contact port 40, and a battery fixing mechanism 50 located between the bottom contact port 30 and the top contact port 40. The bottom contact port 30 and the top contact port 40 are respectively electrically connected to the body 10. Furthermore, the body 10 can measure the battery through the bottom contact port 30 and the top contact port 40.

[0029] All bottom contact ports 30 are fixed with a common fixing strip 60. An elastic member 70 is provided between the fixing strip 60 and the bottom contact port 30, and the elastic member 70 is a compression spring.

[0030] All top contact ports 40 are fixed with a common movable strip 80. The movable strip 80 is movably connected to the measurement platform 20, and the moving direction of the movable strip 80 is parallel to the length direction of the measurement line 21. Thus, the battery can be pressed, and in cooperation with the elastic member 70, an appropriate pressing force is applied to the battery to ensure that the bottom contact port 30 and the top contact port 40 are tightly connected to the battery, and the bottom contact port 30 and the top contact port 40 will not be easily damaged.

[0031] As Figure 3-4 shown, both the bottom contact port 30 and the top contact port 40 include an insulating portion 31 and a metal portion 32. The metal portion 32 penetrates through the fixing strip 60 or the movable strip 80 and is close to the battery fixing mechanism 50 for connecting to the battery, and the insulating portion 31 is connected to the fixing strip 60 or the movable strip 80.

[0032] As Figure 3 shown, the fixing strip 60 is evenly provided with movable mounting holes 61. The insulating portion 31 of the bottom contact port 30 is stuck in the movable mounting holes 61. The cross-section of the fixing strip 60 is a U-shaped structure. The elastic member 70 is inside the fixing strip 60. One end of the elastic member 70 is closely attached to the inner side wall of the fixing strip 60, and the other end of the elastic member 70 is closely attached to the insulating portion 31 of the bottom contact port 30, thereby providing a pressing force to the bottom contact port 30.

[0033] As Figure 3 shown, a through hole 62 is provided at the position where the fixing strip 60 is in close contact with the elastic member 70. The through hole 62 is for a wire 11 for electrically connecting the bottom contact port 30 and the body 10 to pass through. Since the wire 11 also passes through the center of the elastic member 70, the fixing of the elastic member 70 is also ensured.

[0034] As Figure 4 shown, a strip-shaped groove 22 is provided on the measurement platform 20. The length direction of the strip-shaped groove 22 is the same as the length direction of the measurement line 21. A movable bolt 81 is provided on the movable strip 80. The movable bolt 81 penetrates through the movable strip 80 and is connected to the measurement platform 20 through the strip-shaped groove 22. The insulating portion 31 of the top contact port 40 is fixed on the movable strip 80. That is, through the cooperation of the strip-shaped groove 22 and the movable bolt 81, the movable strip 80 can be fixed to any position of the strip-shaped groove 22, thereby realizing the movement of the movable strip 80 along the length direction of the measurement line 21.

[0035] As Figure 5-6As shown, the battery fixing mechanism 50 includes two arc-shaped clamping blocks 51 and a clamping shaft 52. One end of the two arc-shaped clamping blocks 51 is hinged by the clamping shaft 52, and a torsion spring is also provided at the clamping shaft 52 to ensure that the arc-shaped clamping blocks 51 can clamp the battery. Two convex blocks 53 are fixed at both ends of the clamping shaft 52, and the convex blocks 53 are welded and fixed on the measuring platform 20.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A battery measuring device, comprising a body and measuring platforms evenly distributed on both sides of the body, wherein the measuring platforms are evenly distributed in parallel with a plurality of measuring lines, characterized in that: The measuring line comprises a bottom contact port and a top contact port and a battery fixing mechanism located between the bottom contact port and the top contact port, wherein the bottom contact port and the top contact port are electrically connected to the body respectively; All the bottom contact ports are provided with a common fixing strip, and an elastic member is provided between the fixing strip and the bottom contact port; All the top contact ports are provided with a common movable bar, the movable bar is movably connected to the measuring platform, and the movable direction of the movable bar is parallel to the length direction of the measuring line.

2. A battery measuring device as claimed in claim 1, characterized in that: The bottom contact port and the top contact port both include an insulating portion and a metal portion, the metal portion both passes through a fixed bar or a movable bar close to a side of the battery fixing mechanism, and the insulating portion is connected to the fixed bar or the movable bar.

3. A battery measuring device as claimed in claim 2, characterized in that: The fixing bar is evenly distributed with movable mounting holes, the insulating portion of the bottom contact port is stuck in the movable mounting holes, the cross section of the fixing bar is a door-shaped structure, the elastic member is on the inner side of the fixing bar, one end of the elastic member is close to the inner wall of the fixing bar, and the other end of the elastic member is close to the insulating portion of the bottom contact port.

4. A battery measuring device as claimed in claim 3, characterized in that: A through hole is provided at a position where the fixing strip and the elastic member are in close contact with each other, and the through hole is used for electrically connecting the bottom contact port with the body.

5. A battery measuring device as claimed in claim 2, characterized in that: The measuring platform is provided with a strip groove, the length direction of which is consistent with the length direction of the measuring line, the movable bar is provided with a movable bolt, the movable bolt penetrates the movable bar and the strip groove to connect with the measuring platform, and the insulating part of the top contact port is fixed on the movable bar.

6. A battery measuring device as claimed in claim 1, characterized in that: The battery fixing mechanism comprises two arc-shaped clamping blocks and a clamping shaft. One end of the two arc-shaped clamping blocks is hinged by the clamping shaft. A torsion spring is also arranged at the clamping shaft. Both ends of the clamping shaft are mounted on the measuring platform.

7. A battery measuring device as claimed in claim 6, characterized in that: Two protrusions are arranged at both ends of the clamping shaft, and the protrusions are fixed on the measuring platform.

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