CN218213355U

CN218213355U - Soft-package battery internal resistance measuring device

Info

Publication number: CN218213355U
Application number: CN202221829292.6U
Authority: CN
Inventors: 杨文斌; 李春凤; 温灿国; 张晓硕; 翟方宁; 徐亚林; 徐海锋
Original assignee: China Aviation Lithium Battery Co Ltd
Current assignee: China Aviation Lithium Battery Co Ltd
Priority date: 2022-07-15
Filing date: 2022-07-15
Publication date: 2023-01-03
Anticipated expiration: 2032-07-15

Abstract

The utility model relates to a soft-package battery internal resistance measuring device, which comprises a measuring table, a tab pressing block and a positioning component, wherein the positioning component is used for positioning and adjusting the tab pressing block and comprises a positioning rod and a supporting seat; the lug pressing block is adjusted on the positioning rod in a left-right sliding mode, the supporting seat is provided with a guide rail groove, the left end and the right end of the positioning rod extend into the guide rail groove, the guide rail groove limits the positioning rod and the lug pressing block in the front-back direction and ensures that the positioning rod and the lug pressing block move synchronously in the up-down direction; the utility model discloses a laminate polymer battery internal resistance measuring device adopts locating lever and supporting seat to form locating component, and the antipodal ear briquetting carries out the spacing of fore-and-aft direction and controls the location regulation of direction, has guaranteed the accuracy of utmost point ear briquetting and battery electrode ear crimping position, has improved the detection accuracy of battery internal resistance.

Description

Soft-package battery internal resistance measuring device

Technical Field

The utility model relates to a battery detection area, concretely relates to laminate polymer battery internal resistance measuring device.

Background

At present, the soft-package battery obtains more and more extensive application in production and life, and the production quality requirement to soft-package battery also is constantly promoting, for guaranteeing soft-package battery's quality reliability, need detect the screening to its internal resistance of exchanging after soft-package battery makes the completion to the uniformity of the internal resistance of each battery of assurance constitution battery module. However, when the battery internal resistance measuring instrument is used for measuring the alternating current internal resistance of the soft package battery, because the lug of the battery is soft in texture, different positions of the lug are measured, and pressing forces are inconsistent, the alternating current internal resistance value measured each time is different, so that the field measurement result is inconsistent with the quality inspection measurement result, even exceeds the error allowable range, repeated measurement needs to be carried out for many times to ensure that errors meet requirements, and the production progress is seriously influenced.

In order to solve the problem, a special internal resistance measuring device for a soft package battery is designed in the prior art to ensure the measurement precision of the alternating current internal resistance of the battery, for example, the internal resistance measuring tool for the battery disclosed in the chinese utility model with the publication number CN213689881U specifically comprises a base and a probe seat (namely, a tab pressing block), wherein a groove is arranged on the base, a tab supporting surface for the tab of the battery to be placed is formed at the bottom surface of the groove, a protrusion corresponding to the groove is arranged on the bottom surface of the probe seat, when the internal resistance of the battery is measured, the tab of the battery is placed on the tab supporting surface, a tab positioning structure is formed by the groove to position the tab of the battery in the left-right direction, then the probe seat is placed on the base, the protrusion on the bottom surface of the probe seat correspondingly extends into the groove on the base to press the tab in the downward direction, and the probe seat can move along the front-back direction of the groove to adjust the front-back position of the probe seat in coordination with the scale, a probe hole corresponding to the tab position of the battery is arranged on the tab of the battery, and the probe hole of the measuring instrument extends into the tab of the probe fixed in the groove to measure the internal resistance of the battery. The lug of the battery is fixed at a fixed position between the probe seat and the base by matching the protrusion of the probe seat and the groove of the base, and the consistency of the positions of the lugs when different batteries are measured is ensured while the lugs are flattened by the probe seat, so that the accuracy of the measurement result of the internal resistance of the battery is improved.

However, when the internal resistance of the battery is measured, the internal resistance measuring device of the soft-package battery only ensures that the relative positions of the lug pressing blocks and the battery lugs in the left-right direction are consistent, because the battery lugs are soft in texture and the lengths of the battery lugs extending into the grooves on the base in the front-back direction are not fixed, when the probe seat is in contact with the battery lugs in the grooves, the probe seat can move in the front-back direction to adapt to the upper surfaces of the battery lugs, so that the battery lugs are easily driven to deform or displace, the two lug pressing blocks are also easily uneven and cannot synchronously press the lugs, and further, when different batteries are measured, the contact measuring positions of the probes and the battery lugs in the front-back direction cannot be consistent, so that a measuring result still has large errors, and reliable measuring accuracy cannot be ensured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a laminate polymer battery internal resistance measuring device for the position of piezoelectric tab is difficult to keep unanimous problem under the utmost point ear briquetting among the solution prior art.

In order to achieve the above object, the utility model provides a laminate polymer battery internal resistance measuring device adopts following technical scheme: the device for measuring the internal resistance of the soft-package battery comprises a measuring table and a tab pressing block, wherein a tab supporting surface is arranged on the measuring table, the device also comprises a positioning assembly, the positioning assembly is used for positioning and adjusting the position of the tab pressing block, and the positioning assembly comprises a positioning rod and a supporting seat; the positioning rod extends along the left-right direction and penetrates through the lug pressing block, so that the lug pressing block can slide on the positioning rod in a left-right guiding manner; be provided with the guide rail groove on the supporting seat, the locating lever is installed at the guide rail inslot of supporting seat, and the guide rail groove includes the vertical groove along the vertical extension of upper and lower direction, and vertical groove is used for carrying out the spacing of fore-and-aft direction and guaranteeing locating lever and utmost point ear briquetting along the synchronous guiding displacement of upper and lower direction to locating lever and utmost point ear briquetting.

The beneficial effects are that: set up the locating lever and carry out the ascending removal direction in left and right directions to utmost point ear briquetting, make utmost point ear briquetting can carry out position control in left and right directions, and set up the supporting seat that has the guide rail groove and carry out spacing and the direction of upper and lower direction of fore-and-aft direction to the locating lever, the position of utmost point ear briquetting aligns and fixes the back with the battery electrode ear that corresponds like this, utmost point ear briquetting just can reciprocate, can guarantee when measuring different batteries that utmost point ear briquetting about position and fore-and-aft position unchangeable, and guarantee the synchronism of the up-and-down motion of each utmost point ear briquetting by the locating lever when pushing down, and then guarantee the uniformity of detection position, improve the measuring accuracy.

Preferably, the lug pressing block and/or the positioning rod are/is further provided with a locking structure, and the locking structure is used for fixing the position of the lug pressing block on the positioning rod; utilize the locking structure can be with the fixed position of utmost point ear briquetting on the locating lever, the locking structure establishes lock sleeve and locking bolt on the locating lever for sliding sleeve, and the lock sleeve sets up in pairs, and every right two lock sleeves set up respectively in the left and right sides of utmost point ear briquetting, and the dress is worn to adorn on each lock sleeve to the locking bolt, and the locking bolt is used for tightening up the position of lock sleeve on the locating lever with locking, and then realizes that utmost point ear briquetting is fixed for the position of locating lever.

The beneficial effects are that: the locking sleeve sleeved on the positioning rod is used as a locking structure, the locking sleeve is tightened and locked to fix the position of the lug pressing block on the positioning rod, damage of the locking structure to the positioning rod structure is avoided, and guiding sliding of the lug pressing block on the positioning rod is guaranteed.

Preferably, a battery placing groove is formed in the measuring table and used for placing a battery and ensuring the position of the battery to be fixed, and the battery placing groove is formed in the rear side of the positioning rod and the lug pressing block, so that lugs of the battery can be located below the positioning rod and the lug pressing block after the battery is placed into the battery placing groove.

The beneficial effects are that: the battery placing groove is arranged to fix the placing position of the battery, the battery placing position is the same when different batteries are detected, and then the placing position of the electrode lugs of the battery is the same, so that the relative positions of the lug pressing block and the electrode lugs of the different batteries are consistent, the consistency of the electrode lug detection position is guaranteed, and the detection accuracy and the detection efficiency are improved.

Preferably, the left and right both sides wall and the back lateral wall of battery standing groove all are provided with the regulating plate that can the horizontal adjustment remove, the face of regulating plate is parallel to each other and is connected through translation adjustment mechanism with the lateral wall that corresponds, and translation adjustment mechanism can control the regulating plate horizontal migration in the direction of its face of perpendicular to that corresponds to the tight fixed battery of placing in the battery standing groove in top.

The beneficial effects are that: the adjusting plate capable of being adjusted through horizontal movement is arranged on the left side wall, the right side wall and the rear side wall of the battery placing groove, the battery in the battery placing groove is tightly fixed to the front side wall in the battery placing groove, the length of the electrode lugs of different batteries of the same model, which extend out of the battery placing groove forwards, can be kept consistent, the relative positions of the lug pressing block and the lug are guaranteed, the accuracy and consistency of a detection position are further guaranteed, and the detection accuracy is improved.

Preferably, translation adjustment mechanism includes accommodate the lead screw, and accommodate the lead screw's one end is connected with the regulating plate, and the other end is worn out the outside of measuring platform and is fixed and be provided with adjustment handle, and accommodate the lead screw and measuring platform screw thread normal running fit can the translation regulating plate through rotating adjustment handle.

The beneficial effects are that: utilize accommodate the lead screw translation regulating plate roof pressure battery, simple structure is convenient for control regulating plate to the roof pressure of battery, avoids the extrusion damage battery.

Preferably, the supporting seat is platelike, and the guide rail groove of supporting seat still includes horizontal groove and delay groove, and the horizontal groove extends around along the horizontal direction, and the delay groove extends along upper and lower direction, and the one end in horizontal groove and the upper end intercommunication in vertical groove, the other end in horizontal groove and the upper end intercommunication in delay groove, and the delay groove is used for hovering locating lever and utmost point ear briquetting in the top of utmost point ear standing groove.

The beneficial effects are that: set up horizontal groove and delay groove for locating lever and utmost point ear briquetting can hover in the top of utmost point ear holding surface, are convenient for get and put the battery, improve detection efficiency.

Preferably, the supporting seats are two and are respectively arranged on the left side and the right side of the lug supporting surface, the guide rail groove penetrates through the supporting seats along the left-right direction, two ends of the positioning rod penetrate out of the guide rail groove and are fixedly provided with a movable handle, and the positioning rod can be driven to move in the guide rail groove in a guiding manner by controlling the movable handle.

The beneficial effects are that: the two ends of the positioning rod are provided with movable handles which are convenient for moving up and down to adjust the position of the positioning rod.

Preferably, the measuring table is further provided with a tab placing groove, the tab placing groove is arranged corresponding to the position of a tab of the battery, the tab placing groove is used for placing the tab of the battery, and the tab supporting surface is arranged at the bottom of the tab placing groove.

The beneficial effects are that: the lug placing groove for placing the electric lug is arranged, so that the position of the electric lug is convenient to position.

Preferably, a pressure sensor is arranged on the lug supporting surface, a pressure display screen is arranged on the measuring table, and the pressure sensor is used for detecting the downward pressure applied to the electrode lug of the battery and feeding the downward pressure back to the pressure display screen.

The beneficial effects are that: the pressure sensor is arranged to detect the down pressure on the electrode lug of the battery in real time, so that when different batteries are detected, the contact detection pressure of the probe of the battery internal resistance detection instrument and the contact detection pressure of the electrode lug of the battery can be ensured to be consistent, the same detection conditions are ensured, and the detection precision is improved.

Preferably, the tab pressing block is made of an insulating material, and is provided with a detection hole penetrating along the vertical direction so as to insert a probe of a battery internal resistance testing instrument.

Drawings

Fig. 1 is a schematic view of a three-dimensional structure of the internal resistance measuring device of the soft-package battery of the present invention;

fig. 2 is the utility model discloses a laminate polymer battery internal resistance measuring device's locating lever is in the schematic structure under the state of rising.

In the figure: 1. a measuring table; 2. a battery placement groove; 3. an adjusting plate; 4. adjusting the screw rod; 5. a tab support surface; 6. pressing a tab; 7. positioning a rod; 8. a supporting base; 9. a probe; 10. a detection hole; 11. a locking sleeve; 12. a vertical slot; 13. a retention tank; 14. a horizontal groove; 15. a tab placing groove; 16. moving the handle; 17. a pressure display screen; 18. and adjusting the handle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, which may be present, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component 8230; \8230;" etc. does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

The utility model discloses a pouch cell internal resistance measuring device's embodiment one: as shown in fig. 1 and fig. 2, the internal resistance measuring device for the pouch battery of the present embodiment mainly includes a measuring table 1 and a push-down shaping mechanism. Be provided with a battery standing groove 2 and two utmost point ear standing grooves 15 and the pressure display screen 17 that are used for placing the electrode lug of battery that are used for the fixed battery position that waits to detect on the measuring table 1, utmost point ear standing groove 15 sets up the front side at battery standing groove 2, two utmost point ear standing grooves 15 are linked together with battery standing groove 2 corresponding to the position of the electrode lug of battery, the bottom of utmost point ear standing groove 15 is provided with utmost point ear holding surface 5 and pressure sensor, the utmost point ear of battery is placed on utmost point ear holding surface 5, pressure sensor is used for detecting the downforce that the electrode lug of battery received (including the downforce of utmost point ear briquetting 6 and the downforce of probe 9), and with downforce feedback on the pressure display screen 17 of measuring table 1 in real time. Specifically, the pressure sensor is an existing resistance strain type weighing sensor, the pressure value is displayed by adopting a structure which is the same as the basic principle of an existing electronic digital display scale in the measuring table, specifically, an elastic element (not shown) is fixed at the position, corresponding to two positive and negative electrode lugs of a battery, of a lug supporting surface, the elastic element such as a sensitive beam can generate elastic deformation under the action of external force, so that a resistance strain gauge adhered to the surface of the elastic element is also subjected to strain, after the resistance strain gauge is deformed, the resistance value of the resistance strain gauge changes (increases or decreases), the resistance change is converted into an electric signal through a corresponding measuring circuit, and the electric signal is transmitted to a pressure display screen.

Battery standing groove 2's a left side, right side wall and back lateral wall all are provided with can the horizontal adjustment removal regulating plate 3, regulating plate 3 encloses into the battery fixed area that is used for the fixed battery position that waits to detect with the preceding lateral wall of battery standing groove 2 in battery standing groove 2, regulating plate 3 is parallel to each other and is connected through translation adjustment mechanism with the lateral wall that corresponds, translation adjustment mechanism includes accommodate the lead screw 4, accommodate the lead screw 4's one end is connected with regulating plate 3, the other end is worn out the outside of measuring platform 1 and is fixed and be provided with adjustment handle 18, accommodate the lead screw 4 and the 1 screw thread normal running fit of measuring platform, through rotating adjustment handle 18 can control the horizontal movement of regulating plate 3 that corresponds in the direction of its face of perpendicular to, with the tight fixed battery of placing in battery standing groove 2 in top.

The downward pressing and shaping mechanism specifically comprises two tab pressing blocks 6 and a positioning assembly for positioning the positions of the two tab pressing blocks 6, the tab pressing blocks 6 are made of insulating materials, the two tab pressing blocks 6 are respectively arranged at the positions of two electrode tabs of the battery and are used for downward pressing the electrode tabs of the battery placed in the tab placing groove 15, detection holes 10 which are communicated up and down are formed in the two tab pressing blocks 6, and probes 9 for supplying a battery internal resistance testing instrument are inserted to detect the battery.

The locating component comprises a locating rod 7 and two supporting seats 8, the locating rod 7 extends along the left-right direction and sequentially passes through two lug pressing blocks 6, the two lug pressing blocks 6 can slide left and right on the locating rod 7 to adjust the positions of the two lug pressing blocks 6 in the left-right direction, a locking structure used for fixing the positions of the lug pressing blocks 6 on the locating rod 7 is arranged between each lug pressing block 6 and the locating rod 7, the locking structure specifically comprises a locking sleeve 11 and a locking bolt which are sleeved on the locating rod 7 through the sliding sleeve, the locking sleeve 11 is arranged in pairs, each pair of the two locking sleeves 11 are respectively arranged on the left side and the right side of the lug pressing block 6, the locking bolt is arranged on each locking sleeve 11 in a penetrating mode, and the locking bolt is used for tightening up the locking sleeve 11 to lock the positions of the locking sleeve 11 on the locating rod 7, and further realize the position fixing of the lug pressing blocks 6 relative to the locating rod 7.

Two supporting seats 8 set up respectively in the left and right sides of measuring stand 1, and supporting seat 8 specifically is platelike, is provided with the guide rail groove on the supporting seat 8, and the guide rail groove includes along the vertical groove 12 that extends of upper and lower direction, and both ends stretch into the guide rail inslot on the supporting seat 8 of the left and right sides respectively about locating lever 7, and vertical groove 12 is used for making locating lever 7 can drive two utmost point ear briquetting 6 in step and reciprocate to carry on spacingly in the front and back direction to locating lever 7 and utmost point ear briquetting 6. The guide rail groove further comprises a horizontal groove 14 and a detention groove 13, the horizontal groove 14 extends forwards and backwards along the horizontal direction, one end of the horizontal groove 14 is communicated with the vertical groove 12, one end of the horizontal groove 14, far away from the vertical groove 12, is communicated with the detention groove 13, and the detention groove 13 is used for hovering the positioning rod 7 and the two tab pressing blocks 6 above the tab placing groove 15 so as to take and place the battery.

Two ends of the positioning rod 7 penetrate through the guide rail grooves and are fixedly provided with a movable handle 16, and the positioning rod 7 can be driven to move in the guide rail grooves in a guiding manner by controlling the movable handle 16.

The utility model discloses a pouch cell internal resistance measuring device of above-mentioned embodiment the concrete operation process when using does: (1) a first step: the positioning rod 7 is lifted upwards to the detention groove 13, so that the tab pressing block 6 stays above the tab placing groove 15; (2) a second step: placing a battery to be detected into the battery placing groove 2 on the measuring table 1, and correspondingly placing an electrode lug of the battery into the lug placing groove 15; (3) a third step: rotating the adjusting screw rod 4 to translate the adjusting plate 3, and tightly pushing and fixing the battery in the battery placing groove 2; (4) a fourth step of: adjusting the position of a tab pressing block 6 on a positioning rod 7 according to the position of an electrode tab of the battery, enabling the position of the tab pressing block 6 to correspond to the position of the electrode tab in a tab placing groove 15 up and down, putting down the positioning rod 7, enabling the tab pressing block 6 to move downwards to press the electrode tab in the tab placing groove 15, and flattening the electrode tab of the battery; (5) a fifth step: and a probe 9 of a battery internal resistance measuring instrument is inserted into a detection hole 10 on the lug pressing block 6 to measure the battery internal resistance.

Wherein when carrying out battery tab and flattening and measurement operation, carry out by two operating personnel cooperations, one of them operating personnel passes through artifical handheld removal handle 16, artifical application of force pushes down, drives locating lever 7, makes two utmost point ear briquetting 6 push down, flattens utmost point ear, looks over pressure through the pressure display screen, keeps corresponding pressure value (the pressure when measuring internal resistance at every turn needs to keep unanimous, through the inspection of pressure display screen), another operating personnel is through inserting probe 9 of battery internal resistance measuring instrument in inspection hole 10 on utmost point ear briquetting 6, measure.

Of course, the utility model discloses a laminate polymer battery internal resistance measuring device is not limited to the embodiment that above-mentioned introduced yet, and this paper still provides other several kinds and is based on the utility model relates to a laminate polymer battery internal resistance measuring device's embodiment is specifically as follows:

in other embodiments, different from the above embodiments, are: the lug pressing block can be positioned on the positioning rod without a locking sleeve, and other locking structures are adopted, for example, a jacking bolt is arranged on the lug pressing block to jack the positioning rod to realize the positioning of the lug pressing block.

In other embodiments, different from the above embodiments, are: the electrode lug placing groove is not required to be arranged on the measuring table, and the electrode lug can be directly placed on the electrode lug supporting surface of the measuring table.

In other embodiments, different from the above embodiments, are: the battery placing groove can be internally provided with no adjusting plate or can be internally provided with a cover plate or a movable limiting block and other positioning structures to fix the battery in the battery placing groove.

In other embodiments, different from the above embodiments, are: the adjusting plate can be translated without adjusting the screw rod, and other translation adjusting mechanisms can also be adopted, such as an expansion rod or a pushing spring rod.

In other embodiments, different from the above embodiments, are: the utmost point ear briquetting can be not insulating material, also can set up the locating lever into the insulator spindle, perhaps sets up the insulating layer between briquetting and locating lever, can avoid two utmost point ears of battery short circuit can, at this moment, also can not set up the inspection hole on the utmost point ear briquetting, but sets up utmost point ear briquetting into electrically conductive material, utilizes utmost point ear briquetting to electrically conduct the electrode ear of connecting the battery in order to realize detecting.

In other embodiments, different from the above embodiments, are: the guide rail groove on the supporting seat can be also free from a horizontal groove and a detention groove, a locking mechanism can be arranged between the positioning rod and the guide rail groove, and the positioning rod is fixedly suspended above the lug supporting surface by the locking mechanism.

In other embodiments, different from the above embodiments, are: can not set up pressure sensor on the utmost point ear holding surface, correspondingly, also set up the pressure display screen on the measuring table, through use two insulating briquetting that the quality is the same and two probes that the quality is the same guarantee that the overdraft that utmost point ear received is unanimous can.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a laminate polymer battery internal resistance measuring device, includes measuring table (1) and utmost point ear briquetting (6), is equipped with utmost point ear holding surface (5), its characterized in that on measuring table (1): the positioning assembly is used for positioning and adjusting the position of the tab pressing block (6), and comprises a positioning rod (7) and a supporting seat (8);

the positioning rod (7) extends in the left-right direction and penetrates through the lug pressing block (6), so that the lug pressing block (6) can slide on the positioning rod (7) in a left-right guiding manner;

be provided with the guide rail groove on supporting seat (8), install in the guide rail inslot of supporting seat (8) locating lever (7), the guide rail groove is including vertical groove (12) along the vertical extension of upper and lower direction, and vertical groove (12) are used for carrying out the spacing of fore-and-aft direction and guarantee locating lever (7) and utmost point ear briquetting (6) along the synchronous guiding displacement of upper and lower direction to locating lever (7) and utmost point ear briquetting (6).

2. The soft-package battery internal resistance measuring device according to claim 1, characterized in that the tab pressing block (6) and/or the positioning rod (7) are/is further provided with a locking structure, and the locking structure is used for fixing the position of the tab pressing block (6) on the positioning rod (7); the locking structure is characterized in that a locking sleeve (11) and a locking bolt are sleeved on the positioning rod (7) in a sliding mode, the locking sleeve (11) is arranged in pairs, every two locking sleeves (11) are arranged on the left side and the right side of the lug pressing block (6) respectively, the locking bolt is arranged on each locking sleeve (11) in a penetrating mode, the locking bolt is used for tightening the locking sleeves (11) to lock the positions of the locking sleeves (11) on the positioning rod (7), and therefore the lug pressing block (6) is fixed relative to the positioning rod (7).

3. The soft package battery internal resistance measuring device according to claim 2, wherein a battery placing groove (2) is arranged on the measuring table (1), the battery placing groove (2) is used for placing a battery and ensuring the position of the battery to be fixed, and the battery placing groove (2) is arranged at the rear side of the positioning rod (7) and the tab pressing block (6), so that the tab of the battery can be positioned below the positioning rod (7) and the tab pressing block (6) after the battery is placed in the battery placing groove (2).

4. The internal resistance measuring device of the soft package battery according to claim 3, characterized in that the left and right side walls and the rear side wall of the battery placing groove (2) are provided with adjusting plates (3) capable of being horizontally adjusted and moved, the surfaces of the adjusting plates (3) are parallel to the corresponding side wall surfaces and are connected through a translation adjusting mechanism, and the translation adjusting mechanism can control the corresponding adjusting plates (3) to horizontally move in the direction perpendicular to the surfaces of the adjusting plates so as to tightly push and fix the battery placed in the battery placing groove (2).

5. The internal resistance measuring device of the soft-package battery according to claim 4, characterized in that the translation adjusting mechanism comprises an adjusting screw rod (4), one end of the adjusting screw rod (4) is connected with the adjusting plate (3), the other end of the adjusting screw rod penetrates out of the measuring table (1) and is fixedly provided with an adjusting handle (18), the adjusting screw rod (4) is in threaded rotation fit with the measuring table (1), and the adjusting handle (18) can translate the adjusting plate (3) through rotation.

6. The soft-package battery internal resistance measuring device according to claim 1, wherein the supporting seat (8) is plate-shaped, the guide rail groove of the supporting seat (8) further comprises a horizontal groove (14) and a detention groove (13), the horizontal groove (14) extends forwards and backwards along the horizontal direction, the detention groove (13) extends along the up-down direction, one end of the horizontal groove (14) is communicated with the upper end of the vertical groove (12), the other end of the horizontal groove (14) is communicated with the upper end of the detention groove (13), and the detention groove (13) is used for hovering the positioning rod (7) and the tab pressing block (6) above the tab supporting surface (5).

7. The soft package battery internal resistance measuring device according to any one of claims 1 to 6, wherein two supporting seats (8) are provided at the left and right sides of the tab supporting surface (5), respectively, the guide rail groove penetrates through the supporting seats (8) along the left and right directions, two ends of the positioning rod (7) penetrate through the guide rail groove and are fixedly provided with a moving handle (16), and the positioning rod (7) can be driven to move in the guide rail groove by controlling the moving handle (16).

8. The soft package battery internal resistance measuring device according to claim 1, wherein a tab placing groove (15) is further arranged on the measuring table (1), the tab placing groove (15) is arranged corresponding to the position of an electrode tab of the battery, the tab placing groove (15) is used for placing the electrode tab of the battery, and the tab supporting surface (5) is arranged at the bottom of the tab placing groove (15).

9. The soft package battery internal resistance measuring device of claim 1, characterized in that, be provided with pressure sensor on utmost point ear holding surface (5), be provided with pressure display screen (17) on measuring platform (1), pressure sensor is used for detecting the downforce that the electrode ear of battery received and feeds back to on the pressure display screen (17).

10. The soft package battery internal resistance measuring device according to claim 1, wherein the tab pressing block (6) is made of an insulating material, and a detection hole (10) which penetrates through the tab pressing block (6) in the vertical direction is formed in the tab pressing block for inserting a probe (9) of an internal resistance testing instrument.