Storage battery internal resistance measuring device

Abstract

The utility model discloses a storage battery internal resistance measuring device, which belongs to the technical field of measuring devices and comprises a measuring device body, a battery accommodating groove is arranged at the bottom of the rear side surface of the measuring device body, a battery compartment is fixedly arranged in the battery accommodating groove, and a plurality of cathode connecting parts and a plurality of anode connecting parts are symmetrically arranged in the battery compartment. And a battery is arranged between the corresponding negative electrode connecting part and positive electrode connecting part. According to the utility model, by arranging the positive electrode separation device and the negative electrode separation device, when the battery is not used, the negative electrode separation device is used for driving the negative electrode connection part to move in a direction far away from the battery negative electrode, and the positive electrode separation device drives the battery to move in a direction far away from the positive electrode connection part, so that the negative electrode of the battery is separated from the negative electrode connection part; the anode of the battery is separated from the anode connecting part; the purpose that the positive electrode and the negative electrode of the battery are completely electrically disconnected with the equipment when the equipment is not used is achieved, and then the phenomenon that the battery leaks liquid after the electric quantity of the battery is exhausted is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a measuring device, especially a storage battery internal resistance measuring device. BACKGROUND

[0002] The internal resistance tester or the storage battery quick capacity tester is a tester for measuring the health state, the state of charge and the connection resistance parameter of the storage battery, and is completely online measurement, simple in use and easy to operate, and does not need any external adjustment.

[0003] The internal resistance tester is small in size, convenient to carry and use, and is generally placed in a workbench when not in use, since the internal resistance tester is internally provided with a battery, the positive pole of the carbon battery is generally a graphite carbon rod, the negative pole is a zinc cylinder and zinc skin, and the zinc cylinder as the negative pole of the shell participates in the chemical reaction of the battery, and gradually thins with the use of the battery, and liquid leakage is prone to occur after a long time.

[0004] Even if the electrical appliance is not used, the battery in the electrical appliance forms a discharge circuit. All batteries have self-discharge phenomenon, so the current is always flowing invisibly, and the chemical reaction in the battery is also continuously carried out. If the battery is placed in the electrical appliance for a long time without use or removal, the battery may not be discovered and handled in time after the battery power is depleted, thereby causing liquid leakage and polluting the internal equipment and damaging the equipment. In order to solve the problem of liquid leakage of the battery installed in the equipment for a long time, the storage battery internal resistance measuring device is provided. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a storage battery internal resistance measuring device, which prevents battery liquid leakage when the battery is used in the equipment for a long time.

[0006] The utility model adopts the following technical scheme: a storage battery internal resistance measuring device, comprising a measuring device body, a battery accommodating groove is formed in the bottom of the rear side of the measuring device body, a battery compartment is fixedly arranged in the battery accommodating groove, a plurality of negative pole connecting portions and a plurality of positive pole connecting portions are symmetrically arranged in the battery compartment, a battery is arranged between the corresponding negative pole connecting portion and the positive pole connecting portion, the negative pole of the battery is in contact with the negative pole connecting portion, and the positive pole of the battery is in contact with the positive pole connecting portion; a positive pole separation device is arranged on the positive pole connecting portion, and a negative pole separation device is arranged on the negative pole connecting portion.

[0007] Further, the negative pole connecting portion comprises a negative pole spring fixedly arranged on the inner side wall of the left side of the battery compartment, and the negative pole spring is electrically connected with the measuring device body; and a negative pole sheet is fixedly arranged on the free end of the negative pole spring.

[0008] Further, the negative electrode separation device comprises an L-shaped rod fixedly arranged with the negative electrode sheet, the vertical part of the L-shaped rod is fixedly arranged with the negative electrode sheet, and the horizontal part of the L-shaped rod is slidingly arranged on the upper end surface of the battery compartment in the left-right direction, and the negative electrode separation device further comprises a driving mechanism for realizing the left movement of the L-shaped rod to the separation position and the right movement to the working position.

[0009] Further, the positive electrode connecting part comprises a terminal fixedly arranged with the inner side wall of the right side of the battery compartment, and the terminal is electrically connected with the body of the measuring device.

[0010] Further, the positive electrode separation device comprises a separation spring fixedly arranged with the inner side wall of the right side of the battery, and a ring piece fixedly arranged with the free end of the separation spring, and the separation spring and the ring piece are sleeved on the corresponding terminal.

[0011] Further, the outer surface of the negative electrode sheet is fixedly provided with a sliding block, and the sliding block is symmetrically arranged with the L-shaped rod above; the sliding block is inserted on the inner side wall of the left side of the battery compartment and is slidingly connected with the battery compartment, and the isolation block below the sliding block is slidingly arranged in the battery compartment in the up-down direction, the bottom end of the isolation block is fixedly provided with a jacking spring, and the jacking spring drives the isolation block to always move upward; the upper end surface of the isolation block is provided with a driving slope.

[0012] Further, the driving mechanism comprises a connecting rod and a driving block fixedly arranged on the upper end surface of the connecting rod, the driving block is slidingly arranged on the cover plate of the battery compartment in the left-right direction, and the connecting rod is located in the driving groove in the left-right direction of the horizontal part of each L-shaped rod; the upper end surface of the driving block is provided with two through holes, and the upper end surface of the cover plate is provided with two threaded holes at the corresponding position of the driving block.

[0013] Further, the upper end surface of the cover plate of the battery compartment is hingedly provided with a sealing cover.

[0014] Further, the side surface of the cover plate of the battery compartment is fixedly provided with a clamping block, and the side wall of the battery accommodating groove of the body of the measuring device is provided with a clamping groove at the corresponding position of the clamping block; the side surface of the cover plate of the battery compartment is fixedly provided with a fixed plate, the fixed plate is symmetrically arranged with the clamping block, and the fixed plate is fixedly arranged with the body of the measuring device through a fixed bolt.

[0015] Further, the upper end surface of the body of the measuring device is provided with a jack for inserting a test lead, and the front side surface of the body of the measuring device is provided with a test button and a display screen.

[0016] The utility model discloses a positive pole disengaging device and negative pole disengaging device are set up, when the equipment is not used for a long time, the negative pole disengaging device is used for driving negative pole connecting part to remove the direction of battery negative pole, and the positive pole disengaging device drives battery to remove the direction of positive pole connecting part, finally makes the negative pole of battery and negative pole connecting part disengaging contact, and the positive pole of battery and positive pole connecting part disengaging contact, reach when the equipment is not used, the positive pole of battery and negative pole and equipment completely disconnect electric connection's purpose, and then prevent the battery liquid leakage phenomenon from the occurrence after the battery power consumption.

[0017] The utility model discloses a drive block, connecting rod, L rod, negative pole piece, negative pole spring, disengaging spring and ring piece are set up, when the equipment is not used for a long time, drive block removes to the left and drive L rod removes to the left to the disengaging position to the position of locking L rod, the L rod of this time drives negative pole piece to remove to the left through vertical portion, makes negative pole piece and the negative pole of battery disengaging, realizes the purpose that negative pole piece and the negative pole of battery disengaging, and the disengaging spring removes the direction of battery from the post through ring piece simultaneously, finally makes the negative pole of battery and negative pole piece disengaging contact, and the positive pole of battery and post disengaging contact, reach when the equipment is not used, the positive pole of battery and negative pole and equipment completely disconnect electric connection's purpose. ACCURACY OF DRAWINGS

[0018] Figure 1 It is whole three -dimensional structure schematic diagram of the utility model;

[0019] Figure 2 It is three -dimensional structure schematic diagram of the utility model in cover plate;

[0020] Figure 3 It is three -dimensional structure schematic diagram of the utility model in battery compartment;

[0021] Figure 4 It is three -dimensional structure schematic diagram of the utility model in Figure 3 It is the structure amplification schematic diagram of A in the place;

[0022] Figure 5 It is three -dimensional structure schematic diagram of the utility model in measuring device body (omits cover plate);

[0023] Figure 6 It is three -dimensional structure schematic diagram of the utility model in positive pole disengaging device and negative pole disengaging device;

[0024] Figure 7 It is three -dimensional structure schematic diagram of the utility model in disengaging spring;

[0025] Figure 8 It is three -dimensional structure schematic diagram of the utility model in battery installation in battery compartment state structure schematic diagram;

[0026] Figure 9The three-dimensional structure schematic diagram of the battery and the battery compartment in the utility model separates state;

[0027] Figure 10 The three-dimensional structure schematic diagram of the ring piece in the utility model;

[0028] Figure 11 The three-dimensional structure schematic diagram of the negative pole piece in the utility model;

[0029] Figure 12 The three-dimensional structure schematic diagram of the Figure 11 The structure enlarged schematic diagram of B in the utility model;

[0030] Figure 13 The three-dimensional structure schematic diagram of the L rod in the utility model;

[0031] Figure 14 The three-dimensional structure schematic diagram of the driving block in the utility model;

[0032] Figure 15 The three-dimensional structure schematic diagram of the connecting rod in the utility model.

[0033] In the drawing, 1, measuring device body; 2, battery compartment; 3, negative pole connecting part; 4, battery; 5, negative pole spring; 6, negative pole piece; 7, L rod; 8, binding post; 9, separation spring; 10, ring piece; 11, sliding block; 12, isolation block; 13, jacking spring; 14, driving slope; 15, connecting rod; 16, driving block; 17, driving groove; 18, through hole; 19, cover plate; 20, threaded hole; 21, locking bolt; 22, sealing cover; 23, sliding hole; 24, clamping block; 25, fixed plate; 26, fixed bolt; 27, jack; 28, test button; 29, display screen. Specific implementation

[0034] Please refer to Figures 1-15 , the following will be described in detail with the utility model in combination with the drawings and examples:

[0035] The utility model discloses a battery internal resistance measuring device, including measuring device body 1, the rear side bottom of measuring device body 1 is provided with battery containing groove, the battery containing groove is fixedly provided with battery compartment 2, the battery compartment 2 is provided with a plurality of negative pole connecting portion 3 and a plurality of positive pole connecting portion symmetrically, and is provided with battery 4 between corresponding negative pole connecting portion 3 and positive pole connecting portion, the negative pole of battery 4 contacts negative pole connecting portion 3, and the positive pole of battery 4 contacts positive pole connecting portion, when normally using, the battery 4 is installed between each pair of negative pole connecting portion 3 and positive pole connecting portion, and a plurality of battery 4 is powered to measuring device body 1 through negative pole connecting portion 3 and positive pole connecting portion simultaneously, the positive pole of positive pole connecting portion is provided with positive pole separation device, and negative pole connecting portion 3 is provided with negative pole separation device, when the equipment is not used for a long time, negative pole separation device is used to drive negative pole connecting portion 3 to move to the direction of far away from the negative pole of battery 4, and simultaneously positive pole separation device drives battery 4 to move to the direction of far away from positive pole connecting portion, finally makes the negative pole of battery 4 and negative pole connecting portion 3 contact, and the positive pole of battery 4 and positive pole connecting portion contact, when the equipment is not used, the positive pole and the negative pole of battery 4 and the equipment are completely disconnected electrically connected.

[0036] The angle orientation words of the following embodiment are accurate, Figure 6 In the embodiment, the negative pole connecting portion 3 includes a negative pole spring 5 fixedly arranged on the inner side wall of the left side of the battery compartment 2, and the negative pole spring 5 is electrically connected with the measuring device body 1; when in use, the battery 4 is installed in the battery compartment 2, the negative pole spring 5 is compressed, and the free end of the negative pole spring 5 contacts the negative pole of the battery 4; the negative pole of the battery 4 is electrically connected with the measuring device body 1 through the negative pole spring 5; the negative pole separation device is connected with the free end of the negative pole spring 5, and the negative pole separation device is used to drive the free end of the negative pole spring 5 to move away from the negative pole of the battery 4, that is, the negative pole spring 5 is compressed, so that the free end of the negative pole spring 5 is disconnected with the negative pole of the battery 4.

[0037] In the embodiment, the free end of the negative pole spring 5 is fixedly provided with a negative pole sheet 6; when in use, the battery 4 is installed in the battery compartment 2, the negative pole spring 5 is compressed, and the negative pole sheet 6 contacts the negative pole of the battery 4; the negative pole separation device is connected with the negative pole sheet 6.

[0038] In this embodiment, the negative electrode disengaging device includes an L-shaped rod 7 fixedly arranged with the negative electrode sheet 6, the vertical part of the L-shaped rod 7 is fixedly arranged with the negative electrode sheet 6, and the horizontal part of the L-shaped rod 7 is slidingly arranged on the upper end surface of the battery compartment 2 in the left-right direction. The negative electrode disengaging device further includes a driving mechanism for moving the L-shaped rod 7 to the left to the disengaging position and to the right to the working position. The driving mechanism drives the L-shaped rod 7 to move to the left to the disengaging position and locks the position of the L-shaped rod 7. At this time, the L-shaped rod 7 drives the negative electrode sheet 6 to move to the left through the vertical part, so that the negative electrode sheet 6 is disengaged from the negative electrode of the battery 4, achieving the purpose of disengaging the negative electrode sheet 6 from the negative electrode of the battery 4. At the same time, the positive electrode disengaging device drives the battery 4 to move away from the positive electrode connecting part, so that the negative electrode of the battery 4 is disengaged from the negative electrode connecting part 3, and the positive electrode of the battery 4 is disengaged from the positive electrode connecting part. When the equipment is not used, the positive electrode and the negative electrode of the battery 4 are completely disconnected from the electrical connection of the equipment.

[0039] In this embodiment, the positive electrode connecting part includes a terminal post 8 fixedly arranged with the inner side wall on the right side of the battery compartment 2, and the terminal post 8 is electrically connected with the measuring device body 1. When normally used, the battery 4 is installed in the battery compartment 2, the negative electrode spring 5 is compressed, and the negative electrode sheet 6 is in contact with the negative electrode of the battery 4. The terminal post 8 is in contact with the positive electrode of the battery 4. The purpose of electrically connecting the positive electrode and the negative electrode of the battery 4 with the measuring device body 1 through the terminal post 8 and the negative electrode sheet 6 is achieved.

[0040] In this embodiment, the positive electrode disengaging device includes a disengaging spring 9 fixedly arranged with the inner side wall on the right side of the battery 4, and a ring sheet 10 fixedly arranged with the free end of the disengaging spring 9. The disengaging spring 9 and the ring sheet 10 are both sleeved on the corresponding terminal post 8. When used, the battery 4 is installed in the battery compartment 2, the negative electrode spring 5 is compressed, the negative electrode sheet 6 is in contact with the negative electrode of the battery 4, and the positive electrode of the battery 4 is in contact with the terminal post 8. At this time, the ring sheet 10 is in contact with the right end surface of the battery 4, and the disengaging spring 9 is compressed. The purpose of electrically connecting the battery 4 with the measuring device body 1 is achieved. When the equipment is not used for a long time, the battery 4 can be disconnected from the electrical connection of the measuring device body 1 to prevent the battery 4 from forming a self-discharge circuit, thereby preventing the occurrence of the battery 4 leakage phenomenon.

[0041] The driving mechanism drives the L-shaped rod 7 to move to the left to the disengaging position and locks the position of the L-shaped rod 7. At this time, the L-shaped rod 7 drives the negative electrode sheet 6 to move to the left through the vertical part, so that the negative electrode sheet 6 is disengaged from the negative electrode of the battery 4, achieving the purpose of disengaging the negative electrode sheet 6 from the negative electrode of the battery 4. At the same time, the disengaging spring 9 drives the battery 4 to move away from the terminal post 8 through the ring sheet 10, so that the negative electrode of the battery 4 is disengaged from the negative electrode sheet 6, and the positive electrode of the battery 4 is disengaged from the terminal post 8. When the equipment is not used, the positive electrode and the negative electrode of the battery 4 are completely disconnected from the electrical connection of the equipment.

[0042] In the above scheme, when the L-shaped rod 7 is in the disengaging position, the disengaging spring 9 drives the battery 4 to move away from the terminal post 8 through the ring piece 10 until the disengaging spring 9 is in a natural state, at which time the positive electrode of the battery 4 is disengaged from the terminal post 8, and the negative electrode of the battery 4 is disengaged from the negative electrode piece 6, achieving the purpose of disconnecting the battery 4 from the measuring device body 1 in electrical connection. However, since the disengaging spring 9 needs to be elongated to the natural state, the length of the battery compartment 2 in the left-right direction needs to be relatively long to achieve this.

[0043] In order to solve the above technical problems, in the embodiment, the outer surface of the negative electrode piece 6 is fixedly provided with a sliding block 11, which is symmetrically arranged with the L-shaped rod 7 above; the sliding block 11 is inserted on the inner side wall of the left side of the battery compartment 2 and is in sliding connection with the battery compartment 2, the battery compartment 2 below the sliding block 11 is provided with a spacer block 12 in sliding connection in the up-down direction, the bottom end of the spacer block 12 is fixedly provided with a jacking spring 13, the jacking spring 13 drives the spacer block 12 to always move upward, so that the top end of the spacer block 12 abuts against the lower end surface of the sliding block 11; the upper end surface of the spacer block 12 is provided with a driving slope 14.

[0044] In normal use, the negative electrode piece 6 is in contact with the negative electrode of the battery 4, and the terminal post 8 is in contact with the positive electrode of the battery 4, achieving electrical connection between the battery 4 and the measuring device body 1; when the equipment is not used for a long time, the L-shaped rod 7 is driven by the driving mechanism to move leftward to the disengaging position, the L-shaped rod 7 drives the sliding block 11 to move leftward through the negative electrode piece 6, when the L-shaped rod 7 moves leftward to the disengaging position, the spacer block 12 moves upward under the driving of the jacking spring 13, so that the driving slope 14 of the spacer block 12 is in contact with the right end of the sliding block 11, at this time the disengaging spring 9 drives the battery 4 to move leftward through the ring piece 10, the left end surface of the battery 4 is in contact with the side surface of the spacer block 12, preventing the battery 4 from further moving leftward, at this time the negative electrode piece 6 is above the driving slope 14 of the spacer block 12, and the left end surface of the battery 4 is on the right side surface of the spacer block 12, so the negative electrode piece 6 is disengaged from the left end surface of the battery 4, that is, the negative electrode piece 6 is disengaged from the negative electrode of the battery 4; since the battery 4 moves leftward, the positive electrode of the battery 4 is disengaged from the terminal post 8; thereby achieving the purpose of disconnecting the battery 4 from the measuring device body 1 in electrical connection; when continuing to use, the driving block 16 is pushed to move rightward to the working position, and the battery 4 is in electrical connection with the measuring device body 1.

[0045] In this embodiment, the driving mechanism includes a connecting rod 15, and a driving block 16 fixedly arranged on the upper end surface of the connecting rod 15, the driving block 16 is slidingly arranged on the cover plate 19 of the battery compartment 2 in the left-right direction, and the connecting rod 15 is located in the driving slot 17 opened in the horizontal part of each L-shaped rod 7 in the left-right direction; two through holes 18 are opened in the upper end surface of the driving block 16, and two threaded holes 20 are opened in the corresponding positions of the upper end surface of the cover plate 19 and the driving block 16; when the driving block 16 slides to the left side so that the left side through hole 18 and the left side threaded hole 20 are corresponding, the driving block 16 is located in the disengagement position; when the driving block 16 slides to the right side so that the right side through hole 18 and the right side threaded hole 20 are corresponding, the driving block 16 is located in the working position; in normal use, the driving block 16 slides to the right side so that the right side through hole 18 and the right side threaded hole 20 are corresponding, and then the locking bolt 21 is screwed through the right side through hole 18 of the driving block 16 and screwed with the right side threaded hole 20 of the cover plate 19, so that the position of the driving block 16 is locked, at this time, the connecting rod 15 is also located in the right side working position, the negative electrode spring 5 drives the L-shaped rod 7 to move to the right side until the inner side wall of the left side of the driving slot 17 of the horizontal part of the L-shaped rod 7 is in contact with the connecting rod 15, but due to the existence of the battery 4, the L-shaped rod 7 moves to the left side, and the connecting rod 15 is in contact with the inner side wall of the right side of the driving slot 17; at this time, the negative electrode sheet 6 is in contact with the negative electrode of the battery 4, and the positive electrode of the battery 4 is in contact with the guide column, so as to realize the purpose of power supply of the battery 4 to the measuring device body 1; at this time, the disengagement spring 9 is compressed, and the elasticity of the disengagement spring 9 is weaker than that of the negative electrode spring 5; when the equipment is not used for a long time, the locking bolt 21 is disassembled, the driving block 16 is pushed to move to the left side so that the left side through hole 18 and the left side threaded hole 20 are corresponding, and then the locking bolt 21 is screwed through the left side through hole 18 of the driving block 16 and screwed with the left side threaded hole 20 of the cover plate 19, so that the position of the driving block 16 is locked, in this process, the driving block 16 drives the connecting rod 15 to move to the left side in the driving slot 17 of each L-shaped rod 7, when the connecting rod 15 is in contact with the inner side wall of the left side of the driving slot 17, the connecting rod 15 drives each L-shaped rod 7 to move to the left side until the isolation block 12 moves upward under the driving of the jacking spring 13, so that the driving slope 14 of the isolation block 12 is in contact with the right end of the sliding block 11, at this time, the disengagement spring 9 drives the battery 4 to move to the left side through the ring piece 10, the left end surface of the battery 4 is in contact with the side surface of the isolation block 12, and the further left movement of the battery 4 is prevented, at this time, since the negative electrode sheet 6 is located above the driving slope 14 of the isolation block 12, and the left end surface of the battery 4 is located on the right side surface of the isolation block 12, the negative electrode sheet 6 is disengaged from the left end surface of the battery 4, that is, the negative electrode sheet 6 is disengaged from the negative electrode of the battery 4; since the battery 4 moves to the left side, the positive electrode of the battery 4 is disengaged from the terminal post 8; so as to realize the purpose of disconnecting the electrical connection between the battery 4 and the measuring device body 1; when it is needed to continue to use, the battery 4 needs to be electrically connected with the measuring device body 1 again, which can be realized by only pushing the driving block 16 to move to the right side to the working position.Specific working principle is, disassembly locking bolt 21, push drive block 16 to move to the right, in turn drive connecting rod 15 to move to the right, the negative spring 5 at this time 6 push negative plate 5 to the right, until the negative plate 6 and the negative pole of battery 4 contact, in the process, the negative plate 6 drive slider 11 to move to the right, slider 11 resist the drive slope 14 of isolation block 12 force isolation block 12 to move down, until the top of isolation block 12 is completely below the slider 11;At this time, the disengagement spring 9 is compressed, until the positive pole of battery 4 and the terminal 8 contact, realize battery 4 and measuring device body 1 electrical connection, normal use.

[0046] In the embodiment, the upper end surface of the cover plate 19 of the battery compartment 2 is hinged with a sealing cover 22, the sealing cover 22 is rotated to the upper side of the drive block 16 and is fixed by sealing bolts, the sliding hole 23 opened on the upper end surface of the cover plate 19 of the battery compartment 2 is sealed, and the drive block 16 slides left and right in the sliding hole 23; when it is needed to operate the drive block 16 to move, the sealing cover 22 is rotated to expose the drive block 16.

[0047] In the embodiment, the side surface of the cover plate 19 of the battery compartment 2 is fixedly provided with a clamping block 24, the side wall of the battery accommodating groove of the measuring device body 1 is provided with a clamping groove at the position corresponding to the clamping block 24; the side surface of the cover plate 19 of the battery compartment 2 is fixedly provided with a fixed plate 25, the fixed plate 25 is symmetrically arranged with the clamping block 24, and the fixed plate 25 is fixedly arranged with the measuring device body 1 by the fixing bolts 26.

[0048] In the embodiment, the upper end surface of the measuring device body 1 is provided with a jack 27 for inserting test leads, and the front side surface of the measuring device body 1 is provided with a test button 28 and a display screen 29; when in use, two test leads are inserted into the jack 27, and then the test leads are connected with the positive and negative poles of the battery to be tested to test the internal resistance of the battery.

[0049] The utility model discloses a working principle: normal use, negative pole piece 6 is contacted with the negative pole of battery 4, and the binding post 8 is contacted with the positive pole of battery 4, realizes the electric connection of battery 4 and measuring device body 1, when the equipment is not used for a long time, dismounts locking bolt 21, and promotes drive block 16 to move to left side, makes the through-hole 18 of left side and the threaded hole 20 of left side correspond, then passes through locking bolt 21 and is connected with the threaded hole 20 of left side on cover plate 19 screw thread connection through the through-hole 18 of drive block 16 left side, make the position of drive block 16 be locked, in this process, drive block 16 drives connecting rod 15 in the drive groove 17 of every L pole 7 left movement, when connecting rod 15 and the left side of drive groove 17's inner side wall are contacted, connecting rod 15 drives every L pole 7 and moves to left, until the isolation block 12 is driven to move up under the drive of jacking spring 13, make the drive inclined surface 14 of isolation block 12 and the right -hand end of sliding block 11 contact, the battery 4 moves left under the drive of ring piece 10 through the disengaging spring 9 this time, and the left end surface of battery 4 and the side of isolation block 12 contact, prevent the further left movement of battery 4, this time because negative pole piece 6 is located the upper of drive inclined surface 14 of isolation block 12, and the left end surface of battery 4 is located the right side of isolation block 12, so negative pole piece 6 and the left end surface of battery 4 are disconnected, namely negative pole piece 6 and the negative pole of battery 4 are disconnected, because battery 4 moves left, and the positive pole of battery 4 and the binding post 8 are disconnected, thereby realize the purpose that battery 4 and measuring device body 1 are disconnected electrically.

Claims

1. A battery internal resistance measuring device comprising a measuring device body (1), characterized in that: A battery accommodating groove is provided on the bottom rear side of the measuring device body (1). A battery compartment (2) is fixedly installed in the battery accommodating groove. Several negative electrode connection parts (3) and several positive electrode connection parts are symmetrically arranged in the battery compartment (2). A battery (4) is arranged between the corresponding negative electrode connection parts (3) and positive electrode connection parts. The negative electrode of the battery (4) is in contact with the negative electrode connection part (3), and the positive electrode of the battery (4) is in contact with the positive electrode connection part. A positive electrode disconnection device is provided on the positive electrode connection part, and a negative electrode disconnection device is provided on the negative electrode connection part (3).

2. The battery internal resistance measuring apparatus according to claim 1, wherein: The negative electrode connection part (3) includes a negative electrode spring (5) fixedly disposed on the inner side wall of the left side of the battery compartment (2), and the negative electrode spring (5) is electrically connected to the measuring device body (1); a negative electrode plate (6) is fixedly disposed on the free end of the negative electrode spring (5).

3. The battery internal resistance measuring apparatus according to claim 2, wherein: The negative electrode disconnection device includes an L-rod (7) fixedly disposed with the negative electrode plate (6). The vertical part of the L-rod (7) is fixedly disposed with the negative electrode plate (6), and the horizontal part of the L-rod (7) is slidably disposed on the upper end surface of the battery compartment (2) in the left and right direction. The negative electrode disconnection device also includes a drive mechanism for realizing the L-rod (7) moving to the left to the disconnection position and moving to the right to the working position.

4. The battery internal resistance measuring apparatus according to claim 1, wherein: The positive electrode connection includes a terminal (8) fixedly disposed on the inner side wall of the right side of the battery compartment (2), and the terminal (8) is electrically connected to the measuring device body (1).

5. The battery internal resistance measuring apparatus according to claim 4, wherein: The positive electrode disconnection device includes a disconnection spring (9) fixedly disposed on the inner wall of the right side of the battery (4), and an annular piece (10) fixedly disposed on the free end of the disconnection spring (9). The disconnection spring (9) and the annular piece (10) are both sleeved on the corresponding terminal (8).

6. The battery internal resistance measuring apparatus according to claim 3, wherein: A slider (11) is fixedly provided on the outer surface of the negative electrode sheet (6). The slider (11) is symmetrically arranged with the L rod (7) above. The slider (11) is inserted into the inner wall on the left side of the battery compartment (2) and slidably connected to the battery compartment (2). An isolation block (12) is slidably provided in the battery compartment (2) below the slider (11) along the up and down direction. A lifting spring (13) is fixedly provided at the bottom end of the isolation block (12). The lifting spring (13) drives the isolation block (12) to move upward all the time. A driving inclined surface (14) is opened on the upper end surface of the isolation block (12).

7. The battery internal resistance measuring apparatus according to claim 3, wherein: The drive mechanism includes a connecting rod (15) and a drive block (16) fixedly disposed on the upper end face of the connecting rod (15). The drive block (16) is slidably disposed on the cover plate (19) of the battery compartment (2) in the left and right direction. The connecting rod (15) is located in the drive groove (17) opened in the left and right direction on the horizontal part of each L rod (7). Two through holes (18) are opened on the upper end face of the drive block (16), and two threaded holes (20) are opened on the upper end face of the cover plate (19) at the position corresponding to the drive block (16).

8. The battery internal resistance measuring apparatus according to claim 7, wherein: A sealing cap (22) is hinged to the upper end face of the cover plate (19) of the battery compartment (2).

9. The battery internal resistance measuring apparatus according to claim 8, wherein: The side of the cover plate (19) of the battery compartment (2) is fixedly provided with a clamping block (24), the side wall of the battery accommodating groove of the measuring device body (1) is provided with a clamping groove at the corresponding position of the clamping block (24); the side of the cover plate (19) of the battery compartment (2) is fixedly provided with a fixed plate (25), the fixed plate (25) is symmetrically arranged with the clamping block (24), and the fixed plate (25) is fixedly arranged with the measuring device body (1) through a fixing bolt (26).

10. The battery internal resistance measuring apparatus of claim 1, wherein: The upper end face of the measuring device body (1) is provided with a jack (27) for inserting a test lead, and the front side of the measuring device body (1) is provided with a test button (28) and a display screen (29).

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