Storage battery internal resistance tester

Abstract

The utility model provides a storage battery internal resistance tester, which belongs to the technical field of resistance test auxiliary tools, and comprises a box body, a tester body and a test clamp, the tester body is positioned in the box body, the tester body is provided with a wiring terminal, and the wiring terminal is connected with the test clamp through a cable; the test clamp comprises a clamp body and two clamp heads, and the two clamp heads are correspondingly connected to the top ends of the handles respectively; the chuck comprises a connector and a clamping block, and the connector is connected with the handle; clamping grooves are formed in the opposite sides of the two clamping blocks, the clamping grooves are matched to form a clamping hole, and the clamping hole is used for being matched with a pole. According to the storage battery internal resistance tester provided by the utility model, the clamping block of the test clamp is directly provided with the groove, and the shape of the groove is matched with the pole, so that the fitting degree of the clamping block and the pole can be improved, and the accuracy of test data is improved by increasing the contact area of the clamping block and the pole; and the chuck is divided into two parts, so that different storage battery poles can be adapted by replacing the clamping blocks with different slotting shapes.

Description

Technical Field

[0001] The utility model belongs to the technical field of resistance test auxiliary tools, and more specifically relates to a battery internal resistance tester. Background Art

[0002] Performing internal resistance tests on batteries, analyzing the batteries based on the test results, and creating a battery internal resistance profile allows us to promptly identify battery problems. However, the battery packs currently used in various substations come from different manufacturers, and the sizes and shapes of the battery poles vary from manufacturer to manufacturer. The fixed-style clips on the test handles of battery internal resistance testers make internal resistance testing extremely inconvenient, significantly increasing maintenance workload. Furthermore, the fixed, single-shaped clips do not fit the battery poles of many manufacturers, resulting in a limited contact surface. This results in inaccurate test data, hindering analysis and maintenance management of the entire battery pack. Utility Model Content

[0003] The purpose of the utility model is to provide a battery internal resistance tester, aiming to improve the accuracy of test data of the resistance tester.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a battery internal resistance tester, including a box, a tester body and a test clip, the tester body is located in the box, the tester body has a wiring terminal, and the wiring terminal is connected to the test clip through a cable; the test clip includes a clamp body and two clamps, the clamp body includes two hinged handles, and the two clamps are respectively connected to the top of the handles; the clamp includes a connector and a clamping block, and the connector is connected to the handles; clamping grooves are opened on opposite sides of the two clamping blocks, and the clamping grooves cooperate to form a clamping hole, and the clamping hole is used to adapt to the pole; the two clamping blocks correspond one-to-one with the two connectors and are plugged together.

[0005] As another embodiment of the present application, the box body includes a lower box body and an upper box cover, the tester body is bolted to the inner cavity of the box body, and a storage space for accommodating the test clip is reserved on one side of the tester body, and the wiring terminal is located on the side of the tester body facing the storage space; the box body and the upper box cover are hinged, and the box body and the upper box cover are locked by a lock.

[0006] As another embodiment of the present application, the accommodating space is further provided with a partition plate, and the partition plate divides the accommodating space into a clamp body placement cavity and a clamp head placement cavity; the clamp head placement cavity has a cover plate.

[0007] As another embodiment of the present application, the top end of the connector has an extension portion protruding outward, and the bottom end of the clamping block has a connecting groove body matching the extension portion; the extension portion is plugged into the connecting groove body.

[0008] As another embodiment of the present application, the extension portion is a sheet structure, and an elastic connection structure is provided on at least one side wall of the connecting groove body, and the elastic connection structure has freedom along the width direction of the connecting groove body; the sheet structure extends into the inner cavity of the connecting groove body and fits on the elastic connection structure.

[0009] As another embodiment of the present application, the elastic connection structure includes a U-shaped spring piece, and the open end of the U-shaped spring piece is oriented toward the bottom of the connecting groove body.

[0010] As another embodiment of the present application, a limiting hole is provided in the middle of the extension portion; a limiting protrusion is provided in the middle of the elastic connection structure, and the limiting protrusion is adapted to the limiting hole.

[0011] As another embodiment of the present application, the limiting hole is a circular hole; and the limiting protrusion is a truncated cone or a hemispherical shape.

[0012] As another embodiment of the present application, the thickness direction of the extension portion is consistent with the thickness direction of the clip body.

[0013] As another embodiment of the present application, the bottom end of the connecting head has a connecting piece extending downward, and a connecting hole is opened on the connecting piece; the connecting piece is connected to the handle bolt via the connecting hole.

[0014] The beneficial effects of the battery internal resistance tester provided by the present invention are as follows: compared with the prior art, the battery internal resistance tester of the present invention has slots directly on the clamping block of the test clamp, and the shape of the slots is adapted to the pole, which can improve the fit between the clamping block and the pole, and improve the accuracy of the test data by increasing the contact area between the clamping block and the pole; in addition, the clamping head is divided into two parts, the connecting head is connected to the handle, the clamping block is plugged into the connecting head, and the pole is fixed with the help of the clamping slot, and different battery poles can be adapted by replacing the clamping blocks with different slot shapes, thereby improving the detection efficiency and detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic structural diagram of a battery internal resistance tester provided in an embodiment of the present utility model;

[0017] Figure 2 A schematic diagram of the structure of the test clip provided in an embodiment of the present utility model;

[0018] Figure 3 A top view of a chuck provided in an embodiment of the present utility model;

[0019] Figure 4 A schematic diagram of the connection between the connector and the clamping block provided in an embodiment of the present invention;

[0020] Figure 5 A schematic cross-sectional view of an elastic connection structure provided in an embodiment of the present invention.

[0021] In the figure: 100, lower box body; 101, upper box cover; 102, wiring terminal; 103, power switch; 104, working button; 105, display; 106, indicator light; 107, cable; 108, tester body; 109, test clip; 110, handle; 111, connector; 112, connecting piece; 113, clamping block; 114, clamping hole; 115, extension part; 116, limit hole; 117, elastic connection structure; 118, limit protrusion. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] See also Figures 1 to 5 The battery internal resistance tester provided by the present invention is now described. The battery internal resistance tester includes a housing, a tester body 108, and a test clamp 109. The tester body 108 is located within the housing and has a terminal block 102. The terminal block 102 is connected to the test clamp 109 via a cable 107. The test clamp 109 includes a clamp body and two clamps. The clamp body includes two hinged handles 110, and the two clamps are respectively connected to the top of the handles 110. The clamps include a connector 111 and a clamping block 113, and the connector 111 is connected to the handle 110. The two clamping blocks 113 have clamping grooves on opposite sides, and the clamping grooves cooperate to form a clamping hole 114. The clamping hole 114 is used to adapt to the pole. The two clamping blocks 113 correspond one-to-one with the two connectors 111 and are plug-fitted.

[0024] Compared with the prior art, the battery internal resistance tester provided by the present invention has a direct groove on the clamping block 113 of the test clamp 109, and the shape of the groove is adapted to the pole, which can improve the fit between the clamping block 113 and the pole, and improve the accuracy of the test data by increasing the contact area between the clamping block 113 and the pole; in addition, the clamping head is divided into two parts, the connector 111 is connected to the handle 110, the clamping block 113 is plugged into the connector 111, and the pole is fixed with the help of the clamping groove, and different battery poles can be adapted by replacing the clamping block 113 with different slot shapes, thereby improving the detection efficiency and accuracy.

[0025] In order to facilitate the replacement of the test clamp 109 and quickly measure battery poles with different shapes, it is only necessary to pull out the clamp block and replace it without removing the clamping block 113, thereby improving the convenience of replacing the clamp.

[0026] like Figure 2 As shown, an auxiliary groove is formed at the top of the clamping block 113. When the two clamping blocks 113 are clamped, the two auxiliary grooves are connected to form an auxiliary clamping hole. The shape and size of the auxiliary clamping hole are consistent with the clamping hole 114. If the clamping hole 114 is hexagonal, the shape of the auxiliary clamping hole is also hexagonal.

[0027] The shape of the clamping hole 114 can be rectangular, hexagonal, circular, etc.

[0028] In some possible embodiments, see Figure 1 The box body includes a lower box body 100 and an upper box cover 101. The tester body 108 is bolted to the inner cavity of the box body, and a storage space for accommodating the test clip 109 is reserved on one side of the tester body 108. The terminal 102 is located on the side of the tester body 108 facing the storage space; the lower box body 100 and the upper box cover 101 are hinged, and the lower box body 100 and the upper box cover 101 are locked by a lock.

[0029] The opening of the lower box body 100 faces upward, and an upper box cover 101 is hinged at the upper end of one side of the lower box body 100. The upper box cover 101 can be locked on the upper end of the lower box body 100 to close the entire box structure. A handle 110 is installed on one side of the box body for easy carrying.

[0030] The tester body 108 is mounted within the housing, fixedly mounted near one end of the housing. The upward-facing end of the tester body 108 features operating buttons 104, a display 105, a power switch 103, and an indicator light 106. The other side of the tester body 108 provides space for a test clip 109 and a cable 107.

[0031] In addition, the storage space is further provided with a partition plate, which divides the storage space into a chuck placement cavity and a chuck placement cavity; the chuck placement cavity has a cover plate. The partition plate is arranged longitudinally, with the lower end of the partition plate resting on the bottom plate of the lower box body 100, at least one side edge of the partition plate resting on the side plate of the box body, and being fixed to the side plate of the box body by means of bolts, and the other side edge of the partition plate being attached to the side of the tester body 108. Alternatively, a partition plate is further provided between the tester body 108 in the box body and the storage space, and the partition plate is attached to the tester body 108. The side edge of the partition plate away from the side plate of the box body is attached to the partition plate, or is connected and fixed to the partition plate.

[0032] A clamping block 113 with a variety of different clamping grooves is placed in the clamp head placement cavity for easy replacement.

[0033] In some possible embodiments, see Figure 3 The top of connector 111 has an outwardly protruding extension 115, and the bottom of clamping block 113 has a connecting groove that matches extension 115; extension 115 and connecting groove are plugged into each other. The extension 115 at the top of connector 111 and the connecting groove at the bottom of clamping block 113 form a plug-in structure, achieving the mating installation of connector 111 and clamping block 113.

[0034] Optionally, the connector 111, the extension 115 and the clamping block 113 are all made of metal. The extension 115 and the connector 111 are welded and fixed. When the extension 115 extends into the connection slot of the clamping block 113, the side wall of the extension 115 fits the inner side wall of the connection slot to achieve electrical conductivity.

[0035] Furthermore, the extension portion 115 is a sheet structure, and an elastic connection structure 117 is provided on at least one side wall of the connecting groove body, and the elastic connection structure 117 has freedom along the width direction of the connecting groove body; the sheet structure extends into the inner cavity of the connecting groove body and fits on the elastic connection structure 117.

[0036] Because the extension portion 115 is a sheet structure, with its two end surfaces acting as force-bearing surfaces, there are either one or two elastic connecting structures 117. When there is one elastic connecting structure 117, it rests against one end surface of the extension portion 115, holding the extension portion 115 against the other inner sidewall of the connecting trough. When there are two elastic connecting structures 117, they are symmetrically positioned on the two sidewalls of the connecting trough, serving to clamp the extension portion 115. The two elastic connecting structures 117 rest against the two end surfaces of the extension portion 115, respectively, holding the extension portion 115 between them.

[0037] The elastic connection structure 117 is made of metal, and the elastic connection structure 117 is a V-shaped spring.

[0038] Optionally, the elastic connection structure 117 includes a U-shaped spring piece, and the open end of the U-shaped spring piece faces the bottom of the connecting groove body.

[0039] In some possible embodiments, see Figure 3 The extension portion 115 has a limiting hole 116 in the middle, and the elastic connection structure 117 has a limiting protrusion 118 in the middle, which is adapted to the limiting hole 116. The extension portion 115 is a sheet of metal, and a hole is formed in the middle of the extension portion 115. The hole can be a through hole or a countersunk hole depending on the thickness of the extension portion 115.

[0040] The limiting protrusion 118 and the limiting hole 116 provided on the elastic structure are engaged with each other. The elastic structure clamps and fixes the extension part 115 while squeezing the extension part 115, thereby preventing the extension part 115 from accidentally falling out during the internal resistance test.

[0041] When only one elastic connection structure 117 is installed in the connection groove body, the elastic connection structure 117 has a limiting protrusion 118 on the side close to the extension portion 115; and under the elastic action of the elastic connection structure 117, the end of the limiting protrusion 118 is attached to the other inner wall of the connection groove body.

[0042] When two elastic connection structures 117 are installed in the connection slot, one or both of the two elastic connection structures 117 may have a limiting protrusion 118. Alternatively, two U-shaped springs may be installed on the two end faces of the connection slot, one of which has a frustum on its sidewall and the other without. While the extension 115 is held by the two U-shaped springs, the limiting hole 116 in its center is engaged and limited by the limiting protrusion 118.

[0043] In order to facilitate disassembly and assembly, the limiting hole 116 is set to be a circular hole; the limiting protrusion 118 is a truncated cone or a hemispherical shape.

[0044] In some possible embodiments, see Figure 3 and Figure 4 The thickness direction of the extension portion 115 is consistent with the thickness direction of the clip body. This facilitates installation and improves the connection stability between the extension portion 115 and the clamping block 113.

[0045] In some possible embodiments, see Figure 1The bottom end of connector 111 has a downwardly extending connecting piece 112 with a connection hole. Connecting piece 112 is bolted to handle 110 via the connection hole. This bolted connection between connector 111 and handle 110 allows for replacement of connector 111, facilitating maintenance. Connector 111 is connected to cable 107, which is then connected to a test instrument to test the battery's internal resistance.

[0046] In addition, the thickness direction of the extension portion 115 is perpendicular to the thickness direction of the connecting piece 112 , which can improve the connection stability between the connecting head 111 and the clamping block 113 .

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Battery internal resistance tester, characterized in that, The invention comprises a box, a tester body (108) and a test clip (109), wherein the tester body (108) is located in the box, the tester body (108) has a wiring terminal (102), and the wiring terminal (102) is connected to the test clip (109) through a cable (107); the test clip (109) comprises a clamp body and two clamps, the clamp body comprises two hinged handles (110), and the two clamps are respectively connected to the top ends of the handles (110); the clamps comprise a connector (111) and a clamping block (113), and the connector (111) is connected to the handle (110); clamping grooves are provided on opposite sides of the two clamping blocks (113), and the clamping grooves cooperate to form a clamping hole (114), and the clamping hole (114) is used to adapt to the pole; the two clamping blocks (113) correspond to the two connectors (111) one by one and are plug-fitted; The top end of the connector (111) has an extension portion (115) protruding outward, and the bottom end of the clamping block (113) has a connection groove body matching the extension portion (115); the extension portion (115) is plug-fitted into the connection groove body; when the extension portion (115) extends into the connection groove body of the clamping block (113), the side wall of the extension portion (115) fits against the inner side wall of the connection groove body to achieve electrical conduction; The extension portion (115) is a sheet structure, and an elastic connection structure (117) is provided on at least one side wall of the connection slot body, wherein the elastic connection structure (117) has a degree of freedom along the width direction of the connection slot body; the sheet structure extends into the inner cavity of the connection slot body and fits on the elastic connection structure (117).

2. The battery internal resistance tester according to claim 1, characterized in that: The box body comprises a lower box body (100) and an upper box cover (101); the tester body (108) is fixed in the inner cavity of the box body by bolts, and a receiving space for receiving the test clip (109) is reserved on one side of the tester body (108); the connection terminal (102) is located on the side of the tester body (108) facing the receiving space; the box body and the upper box cover (101) are hinged, and the box body and the upper box cover (101) are locked by a lock.

3. The battery internal resistance tester according to claim 2, characterized in that: The accommodating space is further provided with a partition plate, and the partition plate divides the accommodating space into a clamp body placement cavity and a clamp head placement cavity; the clamp head placement cavity is provided with a cover plate.

4. The battery internal resistance tester according to claim 1, characterized in that: The elastic connection structure (117) comprises a U-shaped spring piece, the open end of the U-shaped spring piece facing the bottom of the connecting groove body.

5. The battery internal resistance tester according to claim 1, characterized in that: A limiting hole (116) is provided in the middle of the extension portion (115); a limiting protrusion (118) is provided in the middle of the elastic connection structure (117), and the limiting protrusion (118) is adapted to the limiting hole (116).

6. The battery internal resistance tester according to claim 5, characterized in that: The limiting hole (116) is a circular hole; the limiting protrusion (118) is a truncated cone or a hemispherical shape.

7. The battery internal resistance tester according to claim 1, characterized in that: The thickness direction of the extension portion (115) is consistent with the thickness direction of the clip body.

8. The battery internal resistance tester according to claim 1, characterized in that: The bottom end of the connecting head (111) has a connecting piece (112) extending downward, and a connecting hole is provided on the connecting piece (112); the connecting piece (112) is bolted to the handle (110) via the connecting hole.

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