Stress detection head and device for soft package battery detection

Abstract

A stress detection head and device for soft package battery detection relates to the technical field of DCIR detection of soft package batteries, and comprises a support plate fixedly provided with a ball seat and a conductive rod arranged on the support plate, and the conductive rod is fixedly sleeved with a ball head located in the ball seat. The top of the conducting rod is located above the supporting plate and electrically connected with the detector through a transmission line, the bottom end of the conducting rod penetrates through the ball head and extends into the lower portion of the supporting plate, and a connecting part used for making contact with an electrode of the soft package battery is fixedly arranged at the end of the conducting rod. It is guaranteed that the detection device can smoothly conduct DCIR detection on the soft package battery, and the machining efficiency of the soft package battery is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of DCIR detection of soft-pack batteries, and specifically to a force-bearing detection head and device for soft-pack battery detection. Background Art

[0002] With the rapid development of new energy vehicles and energy storage technologies, soft-pack batteries have become an important development direction for power batteries due to their advantages such as high energy density, high safety, and long cycle life. However, soft-pack batteries still face many challenges in actual applications, especially in the accurate detection and evaluation of battery performance. Among them, direct current internal resistance, as one of the key parameters for measuring battery performance, directly affects the power characteristics, thermal management, and life prediction of the battery. Therefore, accurate and efficient DCIR detection of soft-pack batteries is crucial.

[0003] In the prior art, a detection head is usually used to detect the positive and negative electrodes of the battery. During the detection process, the detection head is pushed to make corresponding contact with the positive and negative electrodes of the battery. During the movement of the detection head or the probe, the transmission line connected to the detection head contacts other components of the device, causing the transmission line to pull the detection head, and then causing the detection head to be bent due to the force, and when the detection head moves to the working position, it cannot be reset, and thus the battery cannot be detected. Summary of the Invention

[0004] In order to solve the problem that the detection head is bent due to the pulling force of the transmission line in the prior art, the present invention provides a force-bearing detection head for soft-pack battery detection, which avoids the detection head being deformed due to the pulling force of the transmission line, ensures that the detection device can smoothly perform DCIR detection on the soft-pack battery, and improves the processing efficiency of the soft-pack battery.

[0005] To achieve the above object, the specific solution adopted by the present invention is as follows: A force-bearing detection head for soft-pack battery detection includes a support plate fixedly provided with a ball seat and a conductive rod arranged on the support plate. A ball head located within the ball seat is fixedly sleeved on the conductive rod. The top of the conductive rod is located above the support plate and is electrically connected to the detector through a transmission line. The bottom end of the conductive rod passes through the ball head and extends below the support plate, and a connection portion for contacting the electrode of the soft-pack battery is fixedly provided at this end.

[0006] As an optimized scheme of the above force-bearing detection head for soft-pack battery detection: The outer side wall of the top of the conductive rod is provided with an external thread, and two compression nuts distributed along its height direction are provided at the top of the conductive rod. A compression area for fixing the transmission line is formed between the two compression nuts.

[0007] As another optimized scheme of the above force-bearing detection head for soft-pack battery detection: A gasket is provided on one side of the compression nut close to the other compression nut.

[0008] As another optimized solution for the force-receiving detection head used in the above-mentioned pouch battery detection: an installation hole is provided on the support plate, the ball seat is located in the installation hole, and the outer side wall of the ball seat is fixedly connected to the inner side wall of the installation hole.

[0009] As another optimized solution for the force-receiving detection head used in the above-mentioned pouch battery detection: a guide block is fixedly connected to the support plate, a through hole for the conductive rod to pass through is provided on the guide block, and there is an activity gap between the outer side wall of the conductive rod and the inner side wall of the through hole.

[0010] A device for pouch battery detection includes a detector, a detection table, and a clamping unit for clamping the pouch battery. Two detection units corresponding to the electrodes of the pouch battery are arranged on the detection table. The detection unit includes a detection head capable of contacting the corresponding electrode and a first cylinder for driving the detection head to move up and down. The detection head is electrically connected to the detector, and the detection head is the above-mentioned force-receiving detection head; the clamping unit includes a bottom plate, a fixed clamping block and a moving clamping block driven by a lead screw are arranged on the bottom plate, and a clamping interval for fixing the pouch battery is formed between the moving clamping block and the fixed clamping block.

[0011] As another optimized solution for the above-mentioned device for pouch battery detection: a support frame is fixedly arranged on the detection table, and the first cylinder is fixed on the support frame.

[0012] As another optimized solution for the above-mentioned device for pouch battery detection: a support plate corresponding to the electrodes of the pouch battery is slidably arranged on the support frame, and the support plate can be driven by a second cylinder to slide below the electrode and contact the lower surface of the electrode.

[0013] As another optimized solution for the above-mentioned device for pouch battery detection: the extending end of the piston rod of the first cylinder is fixedly connected with a connecting plate parallel to the support plate, the support plate is fixedly connected with an intermediate plate in parallel, the intermediate plate and the connecting plate are connected, and a spring for pushing the connecting plate to move downward is arranged between the intermediate plate and the connecting plate.

[0014] As another optimized solution for the above-mentioned device for pouch battery detection: a plurality of guide rods perpendicular to it are fixedly arranged on the intermediate plate, guide holes are provided on the connecting plate, the top ends of the guide rods are located in the guide holes and can slide along the guide holes, and the spring is sleeved on the guide rods.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention provides a force-receiving detection head for soft-pack battery detection. The top of the conductive rod is electrically connected to the transmission line, and the bottom end of the conductive rod is fixedly connected with a connecting part for contacting the electrode of the soft-pack battery. When the transmission line hanging on a certain component of the detection device is pulled, due to the cooperation of the ball head and the ball seat, the conductive rod can move, avoiding bending deformation caused by the pulling of the transmission line. During the downward movement of the detection head, the bottom end of the connecting part contacts the electrode first. As the detection head continues to move downward, an interaction force is generated between the connecting part and the electrode, which will push the conductive rod to deflect and reset, and then make the lower surface of the connecting part contact the electrode.

[0017] 2. The present invention provides a device for soft-pack battery detection. When performing DCIR detection on a soft-pack battery, the first cylinder pushes the detection head downward until the connecting part contacts the electrode of the soft-pack battery, and the detector detects the internal resistance of the soft-pack battery, realizing the on-line detection of the soft-pack battery.

[0018] 3. In the present invention, a spring is arranged between the connecting plate and the middle plate. The first cylinder pushes the connecting plate downward, thereby driving the support plate of the middle plate downward. When the detection head contacts the electrode, the first cylinder continues to push the connecting plate downward. At this time, the spring is compressed, and the spring exerts a pressure on the middle plate and the support plate, ensuring that the connecting part can be in close contact with the electrode. At the same time, the setting of the spring plays a buffering role, avoiding damage to the electrode when the connecting part contacts the electrode, and the restoring elastic force of the spring exerts a downward force on the conductive rod, which can push the conductive rod to reset. Description of the Drawings

[0019] Figure 1 is the three-dimensional view of the detection device of the present invention;

[0020] Figure 2 is the enlarged cross-sectional view of the force-receiving detection head;

[0021] Figure 3 is the top view of the detection device of the present invention;

[0022] Figure 4 is the front view of the detection device of the present invention;

[0023] Figure 5 is the structural schematic diagram of the detection device of the present invention;

[0024] Reference numerals: 1, conductive rod; 101, compression nut; 102, gasket; 103, ball head; 104, connecting part; 2, compression area; 3, support plate; 301, mounting hole; 302, ball seat; 303, guide block; 4, support frame; 5, soft-pack battery; 501, electrode; 6, first cylinder; 601, connecting plate; 602, intermediate plate; 7, clamping unit; 701, bottom plate; 702, moving clamping block; 703, lead screw; 704, first slide rail; 705, first slider; 706, fixed clamping block; 707, cover plate; 8, spring; 9, side plate; 901, inclined hole; 10, sliding shaft; 1001, transmission rod; 1002, locking knob; 11, second cylinder; 1101, supporting plate; 1102, moving plate. Detailed implementation manners

[0025] The technical solutions of the present invention will be further elaborated in detail below in combination with specific embodiments. For parts not detailedly described and disclosed in the following embodiments of the present invention, they should all be understood as the prior art known or should be known to those skilled in the art.

[0026] Embodiment 1

[0027] A force-detectable detection head for detecting a soft-pack battery 5, as Figure 2 shown, includes a support plate 3 fixedly provided with a ball seat 302 and a conductive rod 1 disposed on the support plate 3. Among them, the support plate 3 is a rectangular plate-like mechanism, and a mounting hole 301 is formed in the support plate 3. The mounting hole 301 can be a circular hole or a square hole. In this embodiment, the mounting hole 301 is a circular hole and is a stepped hole. The large-diameter end of the mounting hole 301 is located above, and the small-diameter end is located below. The diameter of the small-diameter end is larger than the diameter of the conductive rod 1; the ball seat 302 is a circular ring structure, and the inner side surface of the ball seat 302 is an arc surface. The ball seat 302 is located in the mounting hole 301, and the outer side wall of the ball seat 302 is fixedly connected to the inner side wall of the mounting hole 301. The ball seat 302 is located at the large-diameter end of the mounting hole 301, and the bottom end surface of the ball seat 302 is flush with the stepped surface of the mounting hole 301. The top end surface of the ball seat 302 is flush with the top end surface of the support plate 3, and the connection method between the two is interference fit.

[0028] The conductive rod 1 has a cylindrical structure; a ball head 103 located within the ball seat 302 is fixedly sleeved on the conductive rod 1. The top of the conductive rod 1 is located above the support plate 3 and is electrically connected to the detector via a transmission line. An external thread is provided on the outer sidewall of the top of the conductive rod 1, and two compression nuts 101 distributed along its height direction are provided at the top of the conductive rod 1. A compression area 2 for fixing the transmission line is formed between the two compression nuts 101. The end of the transmission line is wound around the portion of the conductive rod 1 within the compression area 2 or clamped within the compression area 2. In order to increase the stability of the transmission line, a gasket 102 is provided on one side of the compression nut 101 close to the other compression nut 101. The bottom end of the conductive rod 1 passes through the ball head 103 and extends below the support plate 3, and a connection portion 104 for contacting the electrode 501 of the soft-pack battery 5 is fixedly provided at this end. In this embodiment, the diameter of the connection portion 104 is larger than the diameter of the conductive rod 1, ensuring that the connection portion 104 can cover the electrode 501 when contacting the electrode 501.

[0029] A guiding block 303 is fixedly connected to the support plate 3. The connection mode between the guiding block 303 and the support plate 3 is bolt connection. A through hole for the conductive rod 1 to pass through is provided on the guiding block 303, and there is an activity gap between the outer sidewall of the conductive rod 1 and the inner sidewall of the through hole. It should be noted that the activity gap cannot be too large to avoid the conductive rod 1 deflecting by too large an angle, resulting in its connection portion 104 being unable to contact the electrode. In this embodiment, the through hole is a stepped hole, with the large-diameter end located below and the small-diameter end located above, and the diameter of the small-diameter end is larger than the diameter of the conductive rod 1, ensuring that there is an activity gap between the outer sidewall of the conductive rod 1 and the inner sidewall of the small-diameter end; the diameter of the large-diameter end is larger than the diameter of the ball head 103. It should be noted that there is a gap between the upper surface of the guiding block 303 and the lower surface of the compression nut 101 located below to avoid the conductive rod 1 being blocked by the guiding block 303 when deflecting.

[0030] When the transmission line catches a certain component and pulls the conductive rod 1, the conductive rod 1 moves, avoiding being bent and deformed due to the pulling of the transmission line. After the detection head moves to the working position, the connection portion 104 of the detection head first contacts the electrode 501. If the conductive rod 1 is inclined and the detection head continues to move downward, the connection portion 104 of the conductive rod 1 will deflect under force, causing the lower surface of the connection portion 104 to fit with the electrode.

[0031] Embodiment 2

[0032] A device for detecting a soft-pack battery 5, comprising a detector, a detection table, and a clamping unit 7 for clamping the soft-pack battery 5. A conveyor belt for fixing the clamping unit 7 for the soft-pack battery 5 and transporting it to the detection position is arranged on the detection table; two detection units corresponding to the electrodes 501 of the soft-pack battery 5 are arranged on the detection table. The detection unit includes a detection head capable of contacting the corresponding electrode 501 and a first cylinder 6 for driving the detection head to move up and down. The detection head is electrically connected to the detector, and the detection head is the force-receiving detection head described in Embodiment 1.

[0033] The detection head is arranged as follows. As Figure 4 shown, a support frame 4 is fixedly arranged on the detection table. The connection mode between the support frame 4 and the detection table is bolt connection. The first cylinder 6 is fixed on the support frame 4. The protruding end of the piston rod of the first cylinder 6 is fixedly connected with a connecting plate 601 parallel to the support plate 3. The connecting plate 601 is a rectangular plate-like structure; the support plate 3 is fixedly connected with an intermediate plate 602 in parallel. The intermediate plate 602 is a rectangular plate-like structure. The connection mode between the support plate 3 and the intermediate plate 602 is bolt connection, and there is an accommodation gap between the support plate 3 and the intermediate plate 602 for accommodating the part of the conductive rod 1 above the support plate 3. The intermediate plate 602 and the connecting plate 601 are slidably connected, and a spring 8 for pushing the connecting plate 601 to move downward is arranged between the intermediate plate 602 and the connecting plate 601. The number of springs 8 is two and they are located on both sides of the detection head. Specifically, two guide rods perpendicular to the intermediate plate 602 are fixedly connected to the intermediate plate 602. Guide holes are formed in the connecting plate 601. The top ends of the guide rods extend into the guide holes and can slide along the guide holes. The spring 8 is sleeved on the corresponding guide rod. One end of the spring 8 is connected to the connecting plate 601, and the other end of the spring 8 is connected to the intermediate plate 602. When detecting the soft-pack battery 5, the first cylinder 6 pushes the connecting plate 601 to move downward, thereby driving the intermediate plate 602, the support plate 3, and the detection head to move downward synchronously until the connecting part 104 of the detection head contacts the electrode 501. At this time, the first cylinder 6 continues to push the connecting plate 601 to move downward, and the spring 8 is compressed. The restoring elastic force of the spring 8 will push the connecting part 104 to closely contact the electrode 501, improving the detection accuracy, avoiding that the detection head cannot be detected due to improper movement or damaging the electrode 501 due to over-movement. At the same time, the setting of the spring 8 has a buffering effect and avoids damaging the electrode 501.

[0034] As Figure 5As shown in the figure, in order to prevent the detection head from deforming the electrode 501, a supporting plate 1101 corresponding to the electrode 501 of the soft-pack battery 5 is slidably arranged on the support frame 4, and the supporting plate 1101 can be driven by the second cylinder 11 to slide below the electrode 501 and contact the lower surface of the electrode 501. The number of the supporting plates 1101 is two and corresponds to the electrodes 501 of the soft-pack battery 5 one by one. The number of the second cylinders 11 is two and corresponds to the supporting plates 1101 one by one. Specifically, the setting method of the supporting plate 1101 on the right side is that a first mounting plate is fixedly connected to the middle of the support frame 4, the second cylinder 11 is fixed on the first mounting plate, the end of the piston rod of the second cylinder 11 is fixedly connected with a moving plate 1102. The moving plate 1102 is a vertical plate-like structure, the supporting plate 1101 is fixed at the bottom of the moving plate 1102, and the connection mode between the supporting plate 1101 and the moving plate 1102 is bolt connection. The setting method of the supporting plate 1101 on the left side of the support frame 4 is that a second mounting plate is fixedly connected to the top of the support frame 4, the connection mode between the second mounting plate and the support frame 4 is bolt connection, and the second cylinder 11 is installed on the second mounting plate; the end of the piston rod of the second cylinder 11 is fixedly connected with a first sliding plate, a third cylinder is arranged on the first sliding plate, the end of the piston rod of the third cylinder is fixedly connected with a second sliding plate, and the supporting plate 1101 is fixedly connected with the second sliding plate. That is, the second cylinder 11 pushes the supporting plate 1101 to move left and right, and the third cylinder pushes the supporting plate 1101 to move up and down. The setting of the two supporting plates 1101 plays a role in supporting the electrode 501 and prevents the electrode 501 from deforming due to force.

[0035] The clamping unit 7 includes a bottom plate 701. A fixed clamping block 706 and a moving clamping block 702 driven by a lead screw 703 are arranged on the bottom plate 701. A clamping interval for fixing the soft-pack battery 5 is formed between the moving clamping block 702 and the fixed clamping block 706. Among them, the fixed clamping block 706 is fixedly connected to the bottom plate 701 by bolt connection. The connection mode between the moving clamping block 702 and the bottom plate 701 is that two parallel first slide rails 704 are fixed on the bottom plate 701. The extending direction of the first slide rails 704 is perpendicular to the moving clamping block 702. Two first sliders 705 corresponding to the first slide rails 704 are fixedly connected to the lower surface of the moving clamping block 702. The first sliders 705 can slide along the first slide rails 704; a lead screw 703 is rotatably arranged on the bottom plate 701, and both ends of the lead screw 703 are connected to the bottom plate 701 through bearing seats; a connecting block with a threaded hole is fixedly arranged on the moving clamping block 702. The connection mode between the connecting block and the moving clamping block 702 is bolt connection. The threaded hole is matched with the lead screw 703, and the lead screw 703 passes through the threaded hole and the rotation of the lead screw 703 drives the moving clamping block 702 to reciprocate.

[0036] A carrier plate for carrying sheet batteries is provided between the fixed clamping block 706 and the movable clamping block 702. A plurality of evenly distributed cushion blocks are provided between the carrier plate and the bottom plate 701, and the connection mode between the cushion blocks and the bottom plate 701 is bolt connection; protective pads are fixedly provided on the sides of the fixed clamping block 706 and the movable clamping block 702 close to the clamping area. The protective pads are made of elastic rubber material to protect the surface of the sheet battery.

[0037] Both ends of the fixed clamping block 706 are provided with side plates 9. The side plates 9 are vertically slidably arranged on the bottom plate 701. Specifically, the side plates 9 are connected to the bottom plate 701 through two vertical slide rails and chutes opened on the edges of the side plates 9, that is, the connection mode between the two vertical slide rails and the bottom plate 701 is bolt connection; an inclined hole 901 is opened on the side plate 9, and a sliding shaft 10 is slidably arranged in the inclined hole 901. A wear-resistant wheel is rotatably sleeved on the sliding shaft 10, and the diameter of the wear-resistant wheel is equal to the width of the inclined hole 901; the sliding shaft 10 is fixedly connected to a transmission rod 1001 slidably arranged on the bottom plate 701. Specifically, one end of the transmission rod 1001 is fixedly connected to the sliding shaft 10, and a locking knob 1002 capable of fixing it is arranged at the other end of the transmission rod 1001. When fixing a plurality of sheet batteries, the staff pushes the linkage plate to drive the sliding shaft 10 to slide along the inclined hole 901, and then drives the side plate 9 to vertically move to the required position, and tightens the locking knob 1002 to fix the side plate 9.

[0038] In this embodiment, a cover plate 707 capable of being fixedly connected to the fixed clamping block 706 and the movable clamping block 702 is provided at the top of the clamping area.

[0039] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A force-detectable probe for soft-pack battery detection, characterized in that: It includes a support plate (3) fixedly provided with a ball seat (302) and a conductive rod (1) arranged on the support plate (3). A ball head (103) located within the ball seat (302) is fixedly sleeved on the conductive rod (1). The top of the conductive rod (1) is located above the support plate (3) and is electrically connected to a detector through a transmission line. The bottom end of the conductive rod (1) passes through the ball head (103) and extends below the support plate (3), and a connecting portion (104) for contacting an electrode (501) of a soft-pack battery (5) is fixedly provided at the bottom end of the conductive rod (1).

2. The force-detectable probe for soft-pack battery detection according to claim 1, wherein: External threads are provided on the outer side wall of the top of the conductive rod (1), and two compression nuts (101) distributed along its height direction are provided at the top of the conductive rod (1). A compression area (2) for fixing the transmission line is formed between the two compression nuts (101).

3. The force-detectable detection head for soft-pack battery detection according to claim 2, wherein: A gasket (102) is provided on one side of the compression nut (101) close to the other compression nut (101).

4. The force-detectable probe for soft-pack battery detection according to claim 1, wherein: An installation hole (301) is formed on the support plate (3). The ball seat (302) is located within the installation hole (301), and the outer side wall of the ball seat (302) is fixedly connected to the inner side wall of the installation hole (301).

5. The force-detectable probe for soft-pack battery detection according to claim 1, wherein: A guide block (303) is fixedly connected to the support plate (3). A through hole for the conductive rod (1) to pass through is formed on the guide block (303), and there is a movable gap between the outer side wall of the conductive rod (1) and the inner side wall of the through hole.

6. A device for detecting soft-pack batteries, characterized in that: It includes a detector, a detection table, and a clamping unit (7) for clamping a soft-pack battery (5). Two detection units corresponding to the electrodes (501) of the soft-pack battery (5) are arranged on the detection table. The detection unit includes a detection head capable of contacting the corresponding electrode (501) and a first cylinder (6) for driving the detection head to move up and down. The detection head is electrically connected to the detector. The detection head is the force-receivable detection head described in any one of claims 1-5; the clamping unit (7) includes a bottom plate (701). A fixed clamping block (706) and a movable clamping block (702) driven by a lead screw (703) are arranged on the bottom plate (701). A clamping interval for fixing the soft-pack battery (5) is formed between the movable clamping block (702) and the fixed clamping block (706).

7. The device for detecting a soft-pack battery according to claim 6, wherein: A support frame (4) is fixedly provided on the detection table, and the first cylinder (6) is fixed on the support frame (4).

8. The device for detecting soft-pack batteries according to claim 7, wherein: Tray plates (1101) corresponding one by one to the electrodes (501) of the soft-pack battery (5) are slidably arranged on the support frame (4), and the tray plates (1101) can be driven by a second cylinder (11) to slide below the electrodes (501) and contact the lower surfaces of the electrodes (501).

9. The device for detecting soft-pack batteries according to claim 6, wherein: The extending end of the piston rod of the first cylinder (6) is fixedly connected to a connecting plate (601) parallel to the support plate (3). The support plate (3) is fixedly and parallelly connected to an intermediate plate (602). The intermediate plate (602) is connected to the connecting plate (601), and a spring (8) for pushing the connecting plate (601) to move downward is arranged between the intermediate plate (602) and the connecting plate (601).

10. The device for detecting a soft-pack battery according to claim 9, wherein: A plurality of guide rods perpendicular to the intermediate plate (602) are fixedly arranged thereon. Guide holes are formed in the connecting plate (601). The top ends of the guide rods are located in the guide holes and can slide along the guide holes. The spring (8) is sleeved on the guide rods.

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