CN221056619U - Battery clamp and OCV testing device - Google Patents

Abstract

The utility model discloses a battery clamp and an OCV testing device, wherein the battery clamp comprises a base, a pressurizing assembly, an elastic assembly and a driving assembly, wherein the base comprises a base, a first baffle plate and a second baffle plate which are arranged on the base at intervals along a first direction, and a guide rod connected between the first baffle plate and the second baffle plate; the pressurizing assembly comprises a plurality of parallel pressing plates which are arranged at intervals, and a battery to be tested is placed between two adjacent pressing plates; the elastic component is arranged on the guide rod; the driving assembly comprises a driving piece and a first pushing plate and a second pushing plate which are connected with the driving piece, wherein the driving piece is used for simultaneously driving the first pushing plate and the second pushing plate to move in opposite directions so that a plurality of pressing plates between the elastic assembly and the first pushing plate and a plurality of pressing plates between the elastic assembly and the second pushing plate move towards the elastic assembly in a first direction to extrude the elastic assembly. The utility model can improve the uniformity of pressure among all pressing plates, thereby improving the uniformity of battery performance.

Description

Battery clamp and OCV testing device

Technical Field

The application relates to the technical field of battery production, in particular to a battery clamp and an OCV testing device.

Background

The OCV (Open Circuit Voltage, namely open circuit voltage) testing device can test the open circuit voltage of the battery, and the ratio of the voltage difference to the time difference is calculated through the data obtained by measuring the open circuit voltage of the battery twice to obtain a K value, so that the self-discharge performance of the battery is evaluated; meanwhile, the OCV testing device can also be used for testing the alternating current internal resistance of the battery. When the battery is in an electrified state, chemical reaction and gas generation occur in the battery, so that the battery bulges when the battery is subjected to alternating current internal resistance test in a normal pressure state.

Based on this, in order to avoid the bulge to appear in the battery, be provided with battery anchor clamps at OCV testing arrangement's test station, in the correlation technique, when battery anchor clamps are to battery pressurization, a plurality of clamp plates that constitute battery anchor clamps all move along a direction, in the in-process that a plurality of clamp plates moved along a direction, because of each laminate plate has frictional resistance and the loss of pressure in the transmission process, so that the battery that keeps away from the drive end and the pressure size that the clamp plate that the battery that is close to the drive end received pressurized have great difference, thereby influence the precision of the test result of battery, the gas that produces in the test process makes the battery have the bulge risk simultaneously, thereby influence the uniformity of the performance of battery.

Disclosure of utility model

In order to overcome the defects in the prior art, the utility model provides a battery clamp and an OCV testing device, which can improve the uniformity of pressure among all pressing plates, so that the influence of testing on the uniformity of battery performance is reduced.

In order to solve the above technical problem, in a first aspect, the present utility model provides a battery clamp, including:

The base comprises a base, a first baffle plate, a second baffle plate and a guide rod, wherein the first baffle plate and the second baffle plate are arranged on the base at intervals along a first direction, and the guide rod is arranged between the first baffle plate and the second baffle plate;

The pressurizing assembly comprises a plurality of parallel pressing plates which are arranged at intervals, the pressing plates are slidably arranged on the guide rod, and a battery to be tested is placed between two adjacent pressing plates;

The elastic component is arranged on the guide rod, part of the pressing plates in the plurality of pressing plates are positioned between the elastic component and the first pushing plate, and the other part of the pressing plates are positioned between the elastic component and the second pushing plate;

The driving assembly comprises a driving piece and a first pushing plate and a second pushing plate which are connected with the driving piece, the first pushing plate and the second pushing plate are movably sleeved on the guide rod and located between the first baffle and the second baffle, and the driving piece is used for driving the first pushing plate and the second pushing plate to move in opposite directions at the same time so that a plurality of pressing plates located between the elastic assembly and the first pushing plate and a plurality of pressing plates located between the elastic assembly and the second pushing plate are all moved towards the elastic assembly in the first direction to extrude the elastic assembly.

In a possible implementation manner of the first aspect, the number of the pressing plates located between the elastic assembly and the first pushing plate is equal to the number of the pressing plates located between the elastic assembly and the second pushing plate.

In a possible implementation manner of the first aspect, the elastic component includes a first elastic component and a second elastic component that are disposed at intervals along the first direction;

The battery clamp further comprises a pressure detector, wherein the pressure detector is arranged between the first elastic component and the second elastic component and is used for detecting the pressure when the first elastic component and the second elastic component are compressed.

In a possible implementation manner of the first aspect, the first elastic component includes a first mounting plate and a second mounting plate that are disposed opposite to each other, and a first elastic member disposed between the first mounting plate and the second mounting plate;

The second elastic component comprises a third mounting plate, a fourth mounting plate and a second elastic piece, wherein the third mounting plate and the fourth mounting plate are oppositely arranged, the second elastic piece is arranged between the third mounting plate and the fourth mounting plate, the first mounting plate, the second mounting plate, the fourth mounting plate and the third mounting plate are arranged at intervals along the first direction and can move along the first direction relative to the guide rod, one side surface of the first mounting plate far away from the first elastic piece is connected with one pressing plate close to the first elastic component, one side surface of the third mounting plate far away from the second elastic piece is connected with the other pressing plate close to the second elastic component,

In a possible implementation manner of the first aspect, the connection end of the pressure detector is connected to one of the second mounting plate and the fourth mounting plate, and the detection end is connected to the other of the second mounting plate and the fourth mounting plate.

In a possible implementation manner of the first aspect, the elastic assembly further includes a guide member that is retractable along the first direction, where one end of the guide member is fixedly connected to one of the first mounting plate, the second mounting plate, the third mounting plate, and the fourth mounting plate, and the other end of the guide member is slidably connected to at least one of the other three of the first mounting plate, the second mounting plate, the third mounting plate, and the fourth mounting plate.

In a possible implementation manner of the first aspect, the battery clamp further includes a limiting member, and the limiting member is configured to define a maximum distance between the second mounting plate and the fourth mounting plate.

In a possible implementation manner of the first aspect, the second mounting plate and the fourth mounting plate are respectively provided with a plurality of first sliding through holes in sliding connection with the guide rod, and the two first sliding through holes on the second mounting plate and the fourth mounting plate are diagonally arranged and are respectively in sliding connection with the guide rod through linear bearings.

In a possible implementation manner of the first aspect, two ends of the pressing plate are respectively provided with a plurality of second sliding through holes in sliding fit with the guide rods, the second sliding through holes are equal to the first sliding through holes in number and correspond to the first sliding through holes in position, the second sliding through holes are coaxial with the corresponding first sliding through holes, and two second sliding through holes diagonally arranged on the pressing plate are respectively connected with the guide rods in a sliding manner through the linear bearings.

In a possible implementation manner of the first aspect, a positioning member is detachably disposed between the first baffle and the second baffle, and the positioning member is used for positioning a plurality of batteries to be tested placed in the pressurizing assembly.

In a possible implementation manner of the first aspect, the driving assembly further includes a speed reducer, a transmission assembly and at least one screw rod, one end of the speed reducer is connected with the driving member, the other end of the speed reducer is connected with the input end of the transmission assembly, the output end of the transmission assembly is connected with the screw rod, and two ends of the screw rod respectively and rotatably extend out of the first baffle plate and the second baffle plate and respectively and are in threaded connection with the first push plate and the second push plate, so that the first push plate and the second push plate are respectively driven to move in opposite directions or in opposite directions when the screw rod rotates.

In a possible implementation manner of the first aspect, the first push plate and the second push plate are both provided with a chain and a bolt inserted on the chain, the pressing plate and the chain are fixed by the bolt, and the chain extends along a first direction.

In a second aspect, the present utility model also provides an OCV testing apparatus, including:

A frame body;

The battery clamp of the first aspect is arranged in the frame body, the battery clamp comprises an elastic component and a pressure detector, the elastic component comprises a first elastic component and a second elastic component which are arranged at intervals along a first direction, and the pressure detector is used for detecting the pressure when the first elastic component and the second elastic component are compressed;

The control module is arranged on the frame body and is electrically connected with the pressure detector and the driving piece, and the control module is used for controlling the driving piece to work according to the pressure detected by the pressure detector so as to control the pressurizing pressure of the pressing plate.

In a possible implementation manner of the second aspect, the OCV testing device further includes a voltmeter;

The pressing plate is provided with a conductive part electrically connected with the voltmeter, and the conductive part is also used for being electrically connected with an electrode of the battery to be tested.

Compared with the prior art, the application has at least the following beneficial effects:

In the application, the driving piece is respectively connected with the first pushing plate and the second pushing plate, and a plurality of pressing plates are arranged between the elastic assembly and the first pushing plate, and a plurality of pressing plates are arranged between the elastic assembly and the second pushing plate, so when the driving piece drives the first pushing plate and the second pushing plate to move oppositely, the second pushing plate can push the pressing plates between the elastic assembly and the second pushing plate to move towards the elastic assembly so as to squeeze the elastic assembly, and meanwhile, the first pushing plate can push the plurality of pressing plates between the elastic assembly and the first pushing plate to move towards the elastic assembly so as to squeeze the elastic assembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a top view of a battery clamp provided by an embodiment of the present utility model;

FIG. 2 is a schematic structural diagram of an elastic component according to an embodiment of the present utility model;

FIG. 3 is a side view of an elastomeric component provided in an embodiment of the present utility model;

FIG. 4 is a schematic structural view of a second mounting board according to an embodiment of the present utility model;

FIG. 5 is a schematic structural view of a platen according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a driving assembly according to an embodiment of the present utility model;

FIG. 7 is a front view of a battery clamp according to an embodiment of the present utility model;

FIG. 8 is an enlarged view at B in FIG. 1;

Fig. 9 is a schematic structural diagram of an OCV testing apparatus according to an embodiment of the present utility model.

Reference numerals illustrate:

100-battery clamp; 110-a base; 111-a base; 112-a first baffle; 113-a second baffle; 114-a guide bar; 115-positioning piece; 120-a pressurizing assembly; 121-a pressing plate; 1211-a second sliding through hole; 1212-linear bearings; 130-an elastic component; 131-a first elastic component; 1311-a first mounting plate; 1312-a second mounting plate; 1313-a first resilient member; 132-a second elastic component; 1321-a third mounting plate; 1322-fourth mounting plate; 1323-a second elastic member; 134-guide; 140-a drive assembly; 141-a driver; 142-a first push plate; 143-a second push plate; 144-speed reducer; 145-screw rod; 146-screw nut; 150-a pressure detector; 160-limiting pieces; 161-a first limit part; 162-a second limit; 171-chain; 172-a bolt; 1A-a first sliding through hole;

200-OCV testing device; 210-a frame body; 220-control module.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the present utility model, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

As described in the background art of the present application, in the related art, when the battery clamp pressurizes the battery, the plurality of pressing plates forming the battery clamp all move along one direction, and in the process of moving the plurality of pressing plates along one direction, friction resistance exists in each pressing plate, and loss of pressure in the transmission process exists in each pressing plate, so that a large difference exists between the pressure of the battery far from the driving end and the pressure of the pressing plate pressed by the battery close to the driving end, thereby affecting the accuracy of the test result of the battery, and meanwhile, the gas generated in the test process causes the battery to have a bulge risk, thereby affecting the consistency of the performance of the battery.

In order to solve the technical problems mentioned in the background art, the utility model provides a battery clamp and an OCV testing device, in the battery clamp of the utility model, a part of a plurality of pressing plates of an elastic assembly arranged on a guide rod is positioned between the elastic assembly and a first pushing plate, and the other part of the plurality of pressing plates is positioned between the elastic assembly and a second pushing plate, and a driving piece in a driving assembly can simultaneously drive the plurality of pressing plates positioned between the elastic assembly and the first pushing plate and the plurality of pressing plates positioned between the elastic assembly and the second pushing plate to move towards the elastic assembly so as to squeeze the elastic assembly.

The application is illustrated in detail below by means of specific examples:

Referring to fig. 1, an embodiment of the present application provides a battery clamp 100, where the battery clamp 100 includes a base 110, a pressing assembly 120, an elastic assembly 130, and a driving assembly 140, and the base 110 includes a base 111, a first baffle 112 and a second baffle 113 arranged on the base 111 at intervals along a first direction, and a guide rod 114 disposed between the first baffle 112 and the second baffle 113; the pressing assembly 120 comprises a plurality of parallel pressing plates 121 which are arranged at intervals, the pressing plates 121 are slidably arranged on the guide rods 114, and a battery to be tested is placed between two adjacent pressing plates 121; the elastic assembly 130 is disposed on the guide rod 114, and a part of the pressing plates 121 of the plurality of pressing plates 121 are located between the elastic assembly 130 and the first pushing plate 142, and another part of the pressing plates 121 are located between the elastic assembly 130 and the second pushing plate 143; the driving assembly 140 includes a driving member 141, and a first push plate 142 and a second push plate 143 connected to the driving member 141, where the first push plate 142 and the second push plate 143 are movably sleeved on the guide rod 114 and located between the first baffle 112 and the second baffle 113, and the driving member 141 is used to simultaneously drive the first push plate 142 and the second push plate 143 to move toward each other so that the plurality of pressing plates 121 located between the elastic assembly 130 and the first push plate 142 and the plurality of pressing plates 121 located between the elastic assembly 130 and the second push plate 143 are all moved toward the elastic assembly 130 in a first direction to press the elastic assembly 130.

The specific structure of the base 111 is not limited, for example, the base 111 includes a first plate body and a second plate body disposed at intervals, and a bottom plate connected to bottoms of the first plate body and the second plate body, and the first baffle 112 is fixed and vertically disposed on the first plate body, the second baffle 113 is fixed and vertically disposed on the second plate body.

The first direction refers to the direction indicated by the X arrow in fig. 1, and the first directions mentioned below refer to the directions indicated by the X arrow, and optionally, the first direction is the same as the extending direction of the guide bar 114.

The guide rod 114 is disposed between the first baffle 112 and the second baffle 113, and it should be understood that two ends of the guide rod 114 are fixedly connected with the first baffle 112 and the second baffle 113, respectively, and the guide rod 114 may have a polygonal prism structure or a cylindrical structure, and in this embodiment, the guide rod 114 is exemplified by a cylindrical structure.

In addition, the space between each two adjacent pressing plates 121 of the plurality of pressing plates 121 between the elastic member 130 and the second barrier 113 is used for placing the battery to be tested, and similarly, the space between each two adjacent pressing plates 121 of the plurality of pressing plates 121 between the elastic member 130 and the first barrier 112 is used for placing the battery to be tested. Note that in this embodiment, a plurality refers to two or more numbers.

The driving member 141 may be a hydraulic driving member, a pneumatic driving member, an electric driving member, or the like.

In this embodiment, because the driving member 141 is connected to the first push plate 142 and the second push plate 143 respectively, and a plurality of pressing plates 121 are disposed between the elastic assembly 130 and the first push plate 142, and a plurality of pressing plates 121 are disposed between the elastic assembly 130 and the first push plate 143, when the driving member 141 drives the first push plate 142 and the second push plate 143 to move in opposite directions, the second push plate 143 can push the pressing plates 121 between the elastic assembly 130 and the second push plate 143 to move towards the elastic assembly 130 so as to squeeze the elastic assembly 130, and meanwhile, the first push plate 142 can push the plurality of pressing plates 121 between the elastic assembly 130 and the first push plate 142 to move towards the elastic assembly 130, so that the plurality of pressing plates 121 between the elastic assembly 130 and the second push plate 142 and the plurality of pressing plates 121 between the elastic assembly 130 and the first push plate 142 all move towards the elastic assembly 130, compared with the scheme that the plurality of pressing plates 121 move in the same direction in the related art, that is, the plurality of pressing plates 121 all move towards the first push plate 142 or all move towards the second push plate 143, the difference between the pressing plates 121 and the second push plate 142 can be reduced, and the difference between the pressing plates 121 and the performance of the battery is reduced, and the difference between the pressing plates 121 is further improved.

In some possible embodiments, referring to fig. 2, the number of platens 121 between the elastic assembly 130 and the first push plate 142 is equal to the number of platens 121 between the elastic assembly 130 and the second push plate 143.

Since the number of the pressing plates 121 between the elastic assembly 130 and the first push plate 142 is equal to the number of the pressing plates 121 between the elastic assembly 130 and the second push plate 143, in the process that the first push plate 142 pushes the plurality of pressing plates 121 between the elastic assembly 130 and the first push plate 142 toward the elastic assembly 130 and the second push plate 143 pushes the plurality of pressing plates 121 between the elastic assembly 130 and the second push plate 143 toward the elastic assembly 130, the pressure accumulation loss of the pressing plates 121 between the elastic assembly 130 and the first push plate 142 and the pressure accumulation loss of the pressing plates 121 between the elastic assembly 130 and the second push plate 143 are approximately equal, thereby further improving the uniformity of the performance of the battery to be measured.

In some possible embodiments, referring to fig. 2, the elastic assembly 130 includes a first elastic assembly 131 and a second elastic assembly 132 disposed at intervals along a first direction; the battery clamp 100 further includes a pressure detector 150, where the pressure detector 150 is disposed between the first elastic component 131 and the second elastic component 132, and is configured to detect a pressure when the first elastic component 131 and the second elastic component 132 are compressed.

Since a part of the plurality of pressing plates 121 is located between the elastic assembly 130 and the second push plate 143 and another part of the pressing plates 121 is located between the elastic assembly 130 and the first push plate 142, in order to buffer the pressure of the battery to be measured from the plurality of pressing plates 121 between the elastic assembly 130 and the second push plate 143 and the pressure of the battery to be measured from the plurality of pressing plates 121 between the elastic assembly 130 and the first push plate 142, respectively. And the elastic assembly 130 includes the first elastic assembly 131 and the second elastic assembly 132 arranged at intervals along the first direction, thereby improving uniformity of the pressurizing pressure of the battery to be measured by the pressing plate 121 between the elastic assembly 130 and the first push plate 142 and the pressurizing pressure of the battery to be measured by the pressing plate 121 between the elastic assembly 130 and the second push plate 143.

In addition, by providing the pressure detector 150 between the first elastic member 1313 and the second elastic member 1323, the pressure of the pressing plate 121 to the battery can be monitored constantly, so that the safety and reliability of testing the battery in the battery clamp are further ensured, and damage to the battery caused by overlarge pressure can be effectively avoided.

The pressure detector 150 may be a pressure sensor, a pressure detector, or a device provided with a pressure detection chip.

In some possible embodiments, referring to fig. 2, the first elastic assembly 131 includes first and second mounting plates 1311, 1312 disposed opposite each other and a first elastic member 1313 disposed between the first and second mounting plates 1311, 1312; the second elastic assembly 132 includes a third mounting plate 1321 and a fourth mounting plate 1322 disposed opposite to each other, and a second elastic member 1323 disposed between the third mounting plate 1321 and the fourth mounting plate 1322, where the first mounting plate 1311, the second mounting plate 1312, the fourth mounting plate 1322, and the third mounting plate 1321 are spaced apart in the first direction and movable relative to the guide bar 114 in the first direction, a side of the first mounting plate 1311 away from the first elastic member 1313 is connected to one of the pressing plates 121 near the first elastic assembly 131, and a side of the third mounting plate 1321 away from the second elastic member 1323 is connected to one of the pressing plates 121 near the second elastic assembly 132.

The first elastic member 1313 and the second elastic member 1323 may have elastic structures such as a spring plate and a spring, and the expansion and contraction directions of the first elastic member 1313 and the second elastic member 1323 are parallel to the first direction. The first mounting plate 1311, the second mounting plate 1312, the third mounting plate 1321 and the fourth mounting plate 1322 are all parallel or approximately parallel, so as to ensure the uniformity of the pressure plate 121 on the battery, and avoid the excessive local pressurization of the pressure plate 121 on the battery due to the inclination.

Optionally, the first elastic member 1313 and the second elastic member 1323 are springs, and the springs include a plurality of springs, and the plurality of springs are arranged in an array, so as to improve the uniformity of pressing the pressing plate 121.

In addition, a side surface of the first mounting plate 1311 away from the first elastic member 1313 is connected to the one pressing plate 121 near the first elastic member 131, and it should be understood that the first mounting plate 1311 is directly and fixedly connected to the corresponding pressing plate 121, or the first mounting plate 1311 abuts against the corresponding pressing plate 121, or a gap is formed between the first mounting plate 1311 and the corresponding pressing plate 121, a connecting member is disposed in the gap, and two ends of the connecting member are respectively and fixedly connected to the first mounting plate 1311 and the corresponding pressing plate 121, and similarly, a side surface of the third mounting plate 1321 away from the second elastic member 1323 is connected to the one pressing plate 121 near the second elastic member 132, which is referred to the connection between the first mounting plate 1311 and the corresponding pressing plate 121, and will not be repeated herein.

In this embodiment, since the pressure detector 150 is disposed between the second mounting plate 1312 and the fourth mounting plate 1322, and the first mounting plate 1311, the second mounting plate 1312, the third mounting plate 1321 and the fourth mounting plate 1322 are all movable along the first direction relative to the guide rod 114, the first elastic member 1313 is disposed between the first mounting plate 1311 and the second mounting plate 1312, and the second elastic member 1323 is disposed between the third mounting plate 1321 and the fourth mounting plate 1322, when the driving member 141 drives the first push plate 142 and the second push plate 143 to move in opposite directions, the pressure plate 121 connected to the first mounting plate 1311 and the pressure plate 121 connected to the third mounting plate 1321 can push the first mounting plate 1311 and the third mounting plate 1321 to move in opposite directions, and the first elastic member 1313 and the second elastic member 1323 after compression can push the second mounting plate 1311 and the fourth mounting plate 1322 to move, and the second elastic member 1323 after compression can push the fourth mounting plate 1322 to move towards the second mounting plate 1312, so that the pressure of the fourth battery to be detected on the basis of the pressure detector is taken as the pressure detector when the pressure detector is detected by the pressure detector on the fourth mounting plate 1312.

In addition, since the first mounting plate 1311 is connected to the pressing plate 121 near the first elastic component 131, and the fourth mounting plate 1322 is connected to the pressing plate 121 near the second elastic component 132, the pressures on the first and the fourth mounting plates 1311, 1323 fed back to the first and the fourth mounting plates 1311, 1322 can be uniformly transferred to the two pressing plates 121 near the middle of the guide rod 114, compared with the related art in which the first and the fourth mounting plates 1313, 1323 are directly connected to the two pressing plates 121 near the middle of the guide rod 114, the buffer forces generated by the first and the second elastic members 1313, 1323 directly act on the parts of the two pressing plates 121 near the middle of the guide rod 114, and the shaking or tilting of the two pressing plates 121 is easy to occur due to the smaller stress area of the two pressing plates 121 near the middle of the guide rod 114, so as to affect the uniformity of the battery to be pressed, in this embodiment, since the first and the fourth mounting plates 1311, 1322 are directly connected to the two pressing plates 121 near the middle of the guide rod 114, the two pressing plates 121 near the middle of the guide rod 114 are further improved.

Of course, the structure of the elastic assembly 130 is not limited to the above structure, for example, the elastic assembly 130 includes a first elastic member 1313, a second elastic member 1323, and a second mounting plate 1312 and a fourth mounting plate 1322, wherein one end of the first elastic member 1313 is connected to one pressing plate 121 near the middle of the guide bar 114, the other end is connected to the second mounting plate 1312, one end of the second elastic member 1323 is connected to the other pressing plate 121 near the middle of the guide bar 114, the other end is connected to the fourth mounting plate 1322, and the pressure detector 150 is connected to the second mounting plate 1312 and the fourth mounting plate 1322, respectively.

In some possible embodiments, the connection end of the pressure detector 150 is connected to one of the second mounting plate 1312 and the fourth mounting plate 1322, and the detection end is connected to the other of the second mounting plate 1312 and the fourth mounting plate 1322. Thus, the connection end of the pressure detector 150 can be connected to the detection end thereof when the second mounting plate 1312 and the fourth mounting plate 1322 are moved toward each other, so as to acquire pressure information.

In some possible embodiments, referring to fig. 2 and 3, the elastic assembly 130 further includes a guide 134 telescopically along the first direction, one end of the guide 134 is fixedly connected to one of the first mounting plate 1311, the second mounting plate 1312, the third mounting plate 1321 and the fourth mounting plate 1322, and the other end is slidably connected to at least one of the other three of the first mounting plate 1311, the second mounting plate 1312, the third mounting plate 1321 and the fourth mounting plate 1322.

The telescopic guide 134 has various structures, for example, the guide rod 114 includes a first sleeve and a second sleeve, the first sleeve is provided with a sleeve hole, the second sleeve is slidably inserted into the sleeve hole, or the guide 134 includes a first rod and a second rod, the first rod is provided with a sliding slot, the extending direction of the sliding slot is parallel to the axial direction of the first rod, the second rod is provided with a sliding block matched with the sliding slot, and when the sliding block on the second rod slides in the sliding slot of the first rod, the telescopic guide rod 114 can be realized.

In the present embodiment, since the guide 134 is retractable, and one end of the guide 134 is fixedly connected to one of the first mounting plate 1311, the second mounting plate 1312, the third mounting plate 1321, and the fourth mounting plate 1322, and the other end is slidably connected to at least one of the other three of the first mounting plate 1311, the second mounting plate 1312, the third mounting plate 1321, and the fourth mounting plate 1322, the guide 134 can guide the other three of the first mounting plate 1311, the second mounting plate 1312, the third mounting plate 1321, and the fourth mounting plate 1322.

In some possible embodiments, referring to fig. 4 and 5, the second mounting plate 1312 and the fourth mounting plate 1322 are respectively provided with a plurality of first sliding through holes 1A slidably connected to the guide rod 114, and two first sliding through holes 1A diagonally disposed on the second mounting plate 1312 and the fourth mounting plate 1322 are respectively slidably connected to the guide rod 114 through linear bearings 1212.

Wherein, a plurality of first sliding through holes 1A are provided at both ends of the second mounting plate 1312 and the fourth mounting plate 1322, respectively, in a direction perpendicular to the first direction (the direction perpendicular to the first direction is the direction indicated by the Y arrow in fig. 4).

In addition, in the above-described diagonal arrangement, it should be understood that at least two first sliding through holes 1A of the plurality of first sliding through holes 1A are located on the diagonal line of the second mounting plate 1312 or the fourth mounting plate 1322, that is, the diagonal line of at least two first sliding through holes 1A of the plurality of first sliding through holes 1A coincides with or approximately coincides with the diagonal line of the second mounting plate 1312 or the fourth mounting plate 1322. The second mounting plate 1312 or the fourth mounting plate 1322 is exemplified as a rectangle having a first diagonal line and a second diagonal line, and at least two first sliding through holes 1A are located on the first diagonal line or on the second diagonal line.

Since the two first slide through holes 1A disposed diagonally are respectively slidably connected to the guide rod 114 via the linear bearings 1212, friction between the first slide through holes 1A and the guide rod 114 can be reduced, and production costs of the battery holder 100 can be reduced as compared with the case where the linear bearings 1212 are disposed in each of the first slide through holes 1A.

In some possible embodiments, referring to fig. 4 and 5, the pressing plate 121 is provided with a plurality of second sliding through holes 1211 slidably connected to the guide rod 114, the plurality of second sliding through holes 1211 are equal in number and correspond in position to the plurality of first sliding through holes 1A, the second sliding through holes 1211 are coaxial with the corresponding first sliding through holes 1A, and two second sliding through holes 1211 diagonally provided on the pressing plate 121 are slidably connected to the guide rod 114 through linear bearings 1212, respectively.

For example, the second mounting plate 1312, the fourth mounting plate 1322 and the pressing plate 121 are rectangular, and two diagonal lines on the second mounting plate 1312, the fourth mounting plate 1322 and the pressing plate 121 are a first diagonal line and a second diagonal line, respectively, the first sliding through holes 1A are respectively opened at four corners of the second mounting plate 1312 and the fourth mounting plate 1322, the second sliding through holes 1211 are respectively opened at four corners of the pressing plate 121, and the linear bearings 1212 are respectively provided in the two second sliding through holes 1211 on the first diagonal line of the pressing plate 121, whereby, when the guide rod 114 sequentially passes through one second sliding through hole 1211 and the first sliding through hole 1A on the first diagonal line of the plurality of pressing plates 121, the second mounting plate 1312 and the fourth mounting plate 1322 can slide along the axial direction of the guide rod 114, and, in addition, since the linear bearings 1212 can convert sliding friction into rolling friction, the friction force of the pressing plate 121 relative to the guide rod 114 can be further reduced. Note that the linear bearing 1212 may be a sliding linear bearing, a rolling linear bearing, or the like.

In the present embodiment, since the linear bearings 1212 are respectively installed in the two second slide through holes 1211 diagonally provided on the pressing plates 121, on the one hand, friction force between the second slide through holes 1211 and the guide rods 114 can be reduced, and on the other hand, pressure uniformity between the respective pressing plates 121 can be further improved, and on the other hand, pressure uniformity between the pressing plates 121 can be improved and production cost of the battery clamp 100 can be reduced as compared with the case where the linear bearings 1212 are provided in each of the second slide through holes 1211.

In some possible embodiments, referring to fig. 2, battery clamp 100 further includes a stop 160, stop 160 for defining a maximum distance between second mounting plate 1312 and fourth mounting plate 1322.

Specifically, the second mounting plate 1312 and the fourth mounting plate 1322 extend respectively at two ends perpendicular to the first direction to have a hanging ear portion, the first sliding through hole 1A is located at the hanging ear portion, the first sliding through hole 1A is slidably sleeved on the guide rod 114, the limiting member 160 includes a first limiting portion 161 and a second limiting portion 162, the first limiting portion 161 is opposite to a side of the second mounting plate 1312 facing away from the fourth mounting plate 1322, the second limiting portion 162 is opposite to a side of the fourth mounting plate 1322 facing away from the second mounting plate 1312, and in addition, optionally, the first limiting portion 161 and the second limiting portion 162 are fixedly disposed on the guide rod 114, or the limiting member 160 is fixedly disposed on the base 110.

Thus, by providing the stopper 160, it is possible to prevent the accuracy of the pressure detection by the pressure detector 150 from being affected by the large distance between the second mounting plate 1312 and the fourth mounting plate 1322, thereby further ensuring the uniformity of the battery performance.

In some possible embodiments, referring to fig. 6, a positioning member 115 is detachably disposed between the first and second shutters 112 and 113, and the positioning member 115 is used to position a plurality of batteries to be measured placed in the pressurizing assembly 120.

The positioning member 115 may be a plate-shaped structure or a rod-shaped structure, for example, the positioning member 115 is a positioning rod, the positioning rod extends along the first direction, and after the battery to be measured is placed between the two adjacent pressing plates 121, the positioning rod is fixedly installed between the first baffle 112 and the second baffle 113, and the top of the battery to be measured is abutted against the positioning rod.

Therefore, the positioning piece 115 is arranged to position the battery to be tested placed between the two adjacent pressing plates 121, so that the top of the plurality of batteries to be tested placed between the plurality of pressing plates 121 is flush, and the accuracy of testing the battery to be tested is ensured.

In some possible embodiments, referring to fig. 6 and 7, the driving assembly 140 further includes a speed reducer 144, a transmission assembly, and at least one screw rod 145, one end of the speed reducer 144 is connected with the driving member 141, the other end is connected with the input end of the transmission assembly, the output end of the transmission assembly is connected with the screw rod 145, and two ends of the screw rod respectively rotatably extend out of the first baffle plate 112 and the second baffle plate 113 and respectively are in threaded connection with the first push plate 142 and the second push plate 143, so as to respectively drive the first push plate 142 and the second push plate 143 to move towards or away from each other when the screw rod rotates.

Therefore, since the output end of the driving member 141 is connected to the input end of the speed reducer 144, the power output by the driving member 141 can obtain a larger torque after passing through the speed reducer 144, since the input end of the transmission assembly is connected to the output end of the speed reducer 144 and the output end of the transmission assembly is connected to the screw rod, the larger torque transmitted by the speed reducer 144 is transmitted to the screw rod through the gear transmission member, so that the screw rod rotates relative to the first baffle 112 and the second baffle 113, and since both ends of the screw rod are respectively in threaded connection with the first push plate 142 and the second push plate 143, the first push plate 142 and the second push plate 143 move relative to the axial direction of the screw rod in the process of rotating the screw rod, thereby driving the first push plate 142 and the second push plate 143 to move in opposite directions or back to each other.

In addition, the transmission assembly may be a gear transmission assembly, a belt transmission assembly, or the like.

Optionally, screw nuts 146 are respectively screwed at two ends of the screw, and the screw nuts 146 at two ends of the screw are respectively fixedly connected or integrally formed with the first push plate 142 and the second push plate 143, so that two ends of the screw are respectively screwed with the first push plate 142 and the second push plate 143 through the screw nuts 146.

In some possible embodiments, referring to fig. 1 and 8 in combination, the first push plate 142 and the second push plate 143 are each provided with a chain 171, the platen 121 is fixed to the chain 171 by a latch 172, and the chain 171 extends in the first direction to implement the linkage of the plurality of platens 121 in the first direction.

One end of the chain 171 disposed on the first push plate 142 is fixedly connected to the first push plate 142, the other end extends toward the elastic component 130, and similarly, one end of the chain 171 disposed on the second push plate 143 is fixedly connected to the second push plate 143, and the other end extends toward the spring component.

Thus, by providing the chain 171, the platen 121 can be provided on the chain 171, and the same distance between every two adjacent laminates can be ensured, and in addition, since the assembly of the latch 172 is simple, the platen 121 is fixed on the chain 171 by the latch 172, and the platen 121 fixing structure is simplified.

In addition, the chains 171 on the first push plate 142 and the second push plate 143 each include two, the two chains 171 on the first push plate 142 are arranged in the second direction, the two chains 171 on the first push plate 142 are fixedly disposed on the first push plate 142, respectively, one of the two chains 171 on the first push plate 142 is used for connecting with one end of the plurality of pressing plates 121 located between the first push plate 142 and the elastic assembly 130, and the other one of the two chains 171 on the first push plate 142 is used for connecting with the other end of the plurality of pressing plates 121 located between the first push plate 142 and the elastic assembly 130; meanwhile, the two chains 171 on the push plate 143 are arranged in the second direction, the two chains 171 on the push plate 143 are respectively fixed on the second push plate 143, one of the two chains 171 on the push plate 143 is used for being connected with one end of the plurality of pressing plates 121 between the second push plate 143 and the elastic assembly 130, and the other of the two chains 171 on the push plate 143 is used for being connected with the other end of the plurality of pressing plates 121 between the second push plate 143 and the elastic assembly 130. It should be noted that the second direction is perpendicular to the first direction.

Referring to fig. 9, the embodiment of the present application further includes an OCV testing apparatus 200, where the OCV testing apparatus 200 includes a frame 210, a battery holder 100, and a control module 220, the battery holder 100 is disposed in the frame 210, the battery holder 100 includes an elastic component 130 and a pressure detector 150, the elastic component 130 includes a first elastic component 131 and a second elastic component 132 disposed at intervals along a first direction, and the pressure detector 150 is configured to detect a pressure when the first elastic component 131 and the second elastic component 132 are compressed; the control module 220 is disposed on the frame 210 and electrically connected to the pressure detector 150 and the driving member 141, and the control module 220 is used for controlling the driving member 141 to work to control the pressurizing pressure of the pressing plate 121.

The battery clamp 100 in the embodiment of the present application may have the same structure as any of the battery clamps 100 in the above embodiments, and may bring about the same or similar beneficial effects, and specifically, reference may be made to the description in the above embodiments, which is not repeated herein.

In addition, the control module 220 may be understood as a device provided with a controller and a processor, for example, an upper computer and/or a controller.

In this embodiment, since the control module 220 is electrically connected to the pressure detector 150 and the driving member 141, respectively, when the pressure information detected by the pressure detector 150 is greater than a preset value, the control module 220 controls the output power of the driving member 141 to decrease or suspend the operation, so as to avoid the damage of the battery to be tested caused by the excessive pressurization of the pressure plate 121, thereby improving the intelligentized formation degree and the detection accuracy of the OCV testing device 200.

In addition, optionally, the OCV testing device 200 further includes a voltmeter, and each of the pressing plates 121 is provided with a conductive portion electrically connected to the voltmeter, and the conductive portion is further electrically connected to an electrode of the battery to be tested.

Therefore, in the testing process of the battery to be tested, the testing result of the battery to be tested can be recorded according to the feedback of the voltmeter.

And a wire harness electrically connected to the PCB, the other end of the wire harness being electrically connected to the control module 220.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (14)

1. A battery clamp, comprising:

The base comprises a base, a first baffle plate, a second baffle plate and a guide rod, wherein the first baffle plate and the second baffle plate are arranged on the base at intervals along a first direction, and the guide rod is connected between the first baffle plate and the second baffle plate;

the pressurizing assembly comprises a plurality of parallel pressing plates which are arranged at intervals, the pressing plates are slidably arranged on the guide rod, and a battery to be tested is placed between two adjacent pressing plates;

the elastic component is arranged on the guide rod;

the driving assembly comprises a driving piece and a first pushing plate and a second pushing plate which are connected with the driving piece, the first pushing plate and the second pushing plate are movably sleeved on the guide rod and located between the first baffle and the second baffle, part of the pressing plates are located between the elastic assembly and the first pushing plate, the other part of the pressing plates are located between the elastic assembly and the second pushing plate, and the driving piece is used for driving the first pushing plate and the second pushing plate to move in opposite directions at the same time so that a plurality of pressing plates located between the elastic assembly and the first pushing plate and a plurality of pressing plates located between the elastic assembly and the second pushing plate are all moved towards the elastic assembly in the first direction.

2. The battery clamp of claim 1, wherein the number of pressure plates between the resilient assembly and the first push plate is equal to the number of pressure plates between the resilient assembly and the second push plate.

3. The battery clamp of claim 1, wherein the spring assembly includes a first spring assembly and a second spring assembly spaced apart along the first direction;

The battery clamp further comprises a pressure detector, wherein the pressure detector is arranged between the first elastic component and the second elastic component and is used for detecting the pressure when the first elastic component and the second elastic component are compressed.

4. The battery clamp of claim 3, wherein the first resilient assembly includes first and second oppositely disposed mounting plates and a first resilient member disposed between the first and second mounting plates;

The second elastic component comprises a third mounting plate, a fourth mounting plate and a second elastic piece, wherein the third mounting plate and the fourth mounting plate are oppositely arranged, the second elastic piece is arranged between the third mounting plate and the fourth mounting plate, the first mounting plate, the second mounting plate, the fourth mounting plate and the third mounting plate are arranged at intervals along the first direction and can move along the first direction relative to the guide rod, one side surface, away from the first elastic piece, of the first mounting plate is connected with one pressing plate close to the first elastic component, and one side surface, away from the second elastic piece, of the third mounting plate is connected with one pressing plate close to the second elastic component.

5. The battery clamp of claim 4, wherein the connection end of the pressure detector is connected to one of the second mounting plate and the fourth mounting plate and the detection end is connected to the other of the second mounting plate and the fourth mounting plate.

6. The battery clamp of claim 4, wherein said spring assembly further comprises a guide member extendable in said first direction, one end of said guide member being fixedly connected to one of said first mounting plate, said second mounting plate, said third mounting plate, and said fourth mounting plate, and the other end being slidably connected to at least one of the other three of said first mounting plate, said second mounting plate, said third mounting plate, and said fourth mounting plate.

7. The battery clamp of claim 4, wherein,

The battery clamp also includes a limit for defining a maximum distance between the second mounting plate and the fourth mounting plate.

8. The battery clamp according to claim 4, wherein a plurality of first sliding through holes which are slidably connected to the guide rods are formed in the second mounting plate and the fourth mounting plate, respectively, and two first sliding through holes which are diagonally arranged in the second mounting plate and the fourth mounting plate are slidably connected to the guide rods through linear bearings, respectively.

9. The battery clamp according to claim 8, wherein a plurality of second sliding through holes which are in sliding fit with the guide rods are formed in the pressing plate, the plurality of second sliding through holes are equal in number and correspond in position to the plurality of first sliding through holes, the second sliding through holes are coaxial with the corresponding first sliding through holes, and two second sliding through holes which are diagonally arranged on the pressing plate are respectively in sliding connection with the guide rods through the linear bearings.

10. The battery clamp of claim 1, wherein a positioning member is detachably provided between the first and second baffles, the positioning member being for positioning a plurality of the batteries to be tested placed in the pressurizing assembly.

11. The battery clamp according to any one of claims 1-10, wherein the driving assembly further comprises a speed reducer, a transmission assembly and at least one screw rod, one end of the speed reducer is connected with the driving member, the other end of the speed reducer is connected with the input end of the transmission assembly, the output end of the transmission assembly is connected with the screw rod, and two ends of the screw rod respectively rotatably extend out of the first baffle plate and the second baffle plate and are respectively in threaded connection with the first pushing plate and the second pushing plate so as to respectively drive the first pushing plate and the second pushing plate to move towards each other or back to each other when the screw rod rotates.

12. The battery clamp according to any one of claims 1-10, wherein,

The first push plate and the second push plate are both provided with chains, the pressing plate is fixed with the chains through bolts, and the chains extend along a first direction.

13. An OCV test apparatus, comprising:

A frame body;

The battery clamp of any one of claims 1-12, the battery clamp disposed within the frame, the battery clamp comprising an elastic assembly comprising a first elastic assembly and a second elastic assembly disposed at intervals along a first direction, and a pressure detector for detecting a pressure of the first elastic assembly and the second elastic assembly when compressed;

The control module is arranged on the frame body and is electrically connected with the pressure detector and the driving piece, and the control module is used for controlling the driving piece to work according to the pressure detected by the pressure detector so as to control the pressurizing pressure of the pressing plate.

14. The OCV test device according to claim 13, wherein,

The OCV test device further comprises a voltmeter;

The pressing plate is provided with a conductive part electrically connected with the voltmeter, and the conductive part is also used for being electrically connected with an electrode of the battery to be tested.