Battery clamp

Abstract

The utility model discloses a battery clamp, including upper clamping plate, lower clamping plate, negative pole lug clamp and positive pole lug clamp, the upper clamping plate is connected with the lower clamping plate through first fastener and is connected to hold battery, the negative pole lug clamp and positive pole lug clamp are fixedly installed on the upper surface of lower clamping plate respectively, the top of negative pole lug clamp is equipped with the negative pole terminal for connecting negative pole wire, the top of positive pole lug clamp is equipped with the positive pole terminal for connecting positive pole wire, wherein, the positive pole terminal and negative pole terminal all set up to the upwards, and the center line of negative pole terminal and positive pole terminal is parallel with the upper surface of lower clamping plate. Since the positive pole terminal and negative pole terminal all set up to the upwards, the operator can be from the clamp right above, and the negative pole current line and positive pole current line are connected to the corresponding terminal vertically downward naturally, and the current line and voltage line present natural state of falling, and do not need to carry out any big angle's bending or torsion.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and specifically to battery clamps. Background Technology

[0002] In the research and development and testing of products such as lithium-ion batteries, clamps are widely used to fix batteries and connect testing equipment. For pouch cells with tabs distributed on both sides of the battery, existing clamps typically use an upper and lower clamping plate structure to hold the battery body, with the positive and negative tabs respectively positioned on both sides of the lower clamping plate to correspond to the battery tabs.

[0003] Although existing technologies employ a layout where the tabs are positioned on both sides of the lower clamp, the connection ports of the tabs face the side of the battery. This orientation necessitates that the positive and negative leads connected to the tabs (especially current lines with large cross-sectional areas and poor flexibility) must be led out horizontally or at a large angle. In actual test setups, to secure the leads and connect them to the test equipment, it is often necessary to significantly bend and separate the leads, and twist the connectors (such as lugs) at the ends of the leads. This installation process is not only cumbersome and inflexible, but more importantly, the combined effect of the lead's own weight and the residual torque generated during connection creates significant stress concentration at the connection point between the tab and the lead. This stress concentration can easily lead to unstable contact resistance at the interface between the tab and the clamp, resulting in localized overheating, seriously threatening the safety of the testing process and affecting the accuracy and reliability of the test data. Utility Model Content

[0004] To address the technical problem in existing technologies where the layout of the clamp terminals necessitates that the positive and negative wires connected to the tabs be led out horizontally or at a large angle, this utility model proposes a battery clamp with the positive and negative terminals facing upwards and the center line connecting them horizontally. This allows the large-section wires connected to it to hang naturally in a direct, untwisted, and unbent vertical state under the influence of gravity.

[0005] The technical solution adopted by this utility model is as follows: A battery clamp includes an upper clamping plate, a lower clamping plate, a negative electrode clamp, and a positive electrode clamp. The upper clamping plate and the lower clamping plate are connected by a first fastener to clamp the battery. The negative electrode clamp and the positive electrode clamp are respectively fixedly installed on the upper surface of the lower clamping plate. The top of the negative electrode clamp is provided with a negative terminal for connecting a negative electrode wire. The top of the positive electrode clamp is provided with a positive terminal for connecting a positive electrode wire. The positive terminal and the negative terminal are both facing upwards, and the center line connecting the negative terminal and the positive terminal is parallel to the upper surface of the lower clamping plate.

[0006] Optionally, the negative electrode clip includes an upper negative electrode insulating pad, an upper negative electrode metal sheet, a lower negative electrode metal sheet, and a negative electrode insulating base, which are stacked sequentially from top to bottom; the positive electrode clip includes an upper positive electrode insulating pad, an upper positive electrode metal sheet, a lower positive electrode metal sheet, and a positive electrode insulating base, which are stacked sequentially from top to bottom; the negative electrode connection port is located on the upper surface of the lower negative electrode metal sheet, and the positive electrode connection port is located on the upper surface of the lower positive electrode metal sheet.

[0007] Optionally, the upper metal sheet and the lower metal sheet of the negative electrode are arranged opposite to each other to form a clamping space for clamping the negative electrode tab of the battery; the upper metal sheet and the lower metal sheet of the positive electrode are arranged opposite to each other to form a clamping space for clamping the positive electrode tab of the battery.

[0008] Optionally, the upper insulating pad, upper metal sheet, lower metal sheet, and insulating base of the negative electrode are fixedly connected by a second fastener; the upper insulating pad, upper metal sheet, lower metal sheet, and insulating base of the positive electrode are fixedly connected by a third fastener.

[0009] Optionally, the negative terminal and the positive terminal are one of the following: threaded hole, through hole, terminal post, or quick-connect terminal.

[0010] Optionally, the negative electrode insulating base and the positive electrode insulating base are respectively fixedly connected to the lower clamping plate by a fourth fastener.

[0011] Optionally, both the second and third fasteners are screws, bolts, or studs.

[0012] Optionally, the fourth fastener is a screw, bolt, or stud.

[0013] Optionally, the first fastener is a screw, bolt, or stud.

[0014] The beneficial effects of this invention are as follows: the upward orientation of the positive and negative terminals and the horizontal alignment of their centers allow the large-section conductors connected to them to hang naturally in a vertical state without twisting or bending under gravity. This structure eliminates the large-angle bending and twisting required by horizontally led-out conductors in existing technologies, greatly reducing stress concentration at the electrode clamp connection point caused by the conductor's own weight and residual installation torque. The elimination of stress concentration significantly reduces contact resistance fluctuations at the electrode-clamp contact interface caused by microscopic deformation, ensuring stable contact resistance and effectively avoiding the risk of localized overheating during testing. This greatly improves the safety of the testing process and the accuracy and reliability of measurement data (such as internal resistance and voltage). Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a fixture in the prior art;

[0016] Figure 2 This is a schematic diagram of the battery clamp proposed in an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the upper and lower clamping plates holding the battery according to an embodiment of the present invention;

[0018] Figure 4 This is an exploded view of the negative electrode clip proposed in an embodiment of this utility model;

[0019] Figure 5 This is an exploded view of the positive electrode clip proposed in an embodiment of this utility model;

[0020] Figure 6 This is a schematic diagram showing the battery clamp and the positive and negative electrode wires in conjunction with the embodiment of this utility model.

[0021] The markings in the attached figures are as follows: 1. Upper clamp; 2. Lower clamp; 3. Negative electrode ear clip; 31. Upper negative electrode insulating pad; 32. Upper negative electrode metal piece; 33. Lower negative electrode metal piece; 331. Negative electrode connection port; 34. Negative electrode insulating base; 4. Positive electrode ear clip; 41. Upper positive electrode insulating pad; 42. Upper positive electrode metal piece; 43. Lower positive electrode metal piece; 431. Positive electrode connection port; 44. Positive electrode insulating base; 5. First fastener; 6. Second fastener; 7. Third fastener; 8. Fourth fastener; 9. Battery; 101. Positive electrode wire; 102. Negative electrode wire. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] like Figures 2 to 6As shown, this embodiment discloses a battery clamp, including an upper clamping plate 1, a lower clamping plate 2, a negative electrode clip 3, and a positive electrode clip 4. The upper clamping plate 1 and the lower clamping plate 2 are detachably connected by a first fastener 5 connecting the upper clamping plate 1 and the lower clamping plate 2, thereby stably clamping the soft-pack battery 9 between them. The negative electrode clip 3 and the positive electrode clip 4 are respectively fixedly installed on the upper surface of the lower clamping plate 2. The top of the negative electrode clip 3 is provided with a negative terminal 331 for connecting the negative electrode wire 102, and the top of the positive electrode clip 4 is provided with a positive terminal 431 for connecting the positive electrode wire 101. Both the positive terminal 431 and the negative terminal 331 are upward-facing, and the center line connecting the negative terminal 331 and the positive terminal 431 is parallel to the upper surface of the lower clamp 2. The positive terminal wire 101 and the negative terminal wire 102 connected to them hang naturally in a straight, untorsed, and unbent vertical state under gravity, eliminating the possibility of large-angle separation and twisting of the wires required in existing technologies, and minimizing the impact of the wire's own weight and residual torque on the connection point. The center line connecting the negative terminal 331 and the positive terminal 431 is no longer than the length of the line connecting the negative terminal clamp 3 and the positive terminal clamp 4.

[0024] The negative electrode clip 3 is composed of an upper negative electrode insulating pad 31, an upper negative electrode metal sheet 32, a lower negative electrode metal sheet 33, and a negative electrode insulating base 34, stacked sequentially from top to bottom. The positive electrode clip 4 has a similar structure, including an upper positive electrode insulating pad 41, an upper positive electrode metal sheet 42, a lower positive electrode metal sheet 43, and a positive electrode insulating base 44. The horizontally facing negative electrode connection port 331 is located on the upper surface of the lower negative electrode metal sheet 33, and the positive electrode connection port 431 is located on the upper surface of the lower positive electrode metal sheet 43. This stacked structure not only provides a stable clamping force but also ensures electrical safety by spacing the conductive metal sheets and insulating components.

[0025] In the negative electrode clip 3, the upper negative metal piece 32 and the lower negative metal piece 33 are positioned opposite each other, forming a clamping space for holding the negative electrode tab of the battery 9. Similarly, in the positive electrode clip 4, the upper positive metal piece 42 and the lower positive metal piece 43 form a clamping space for holding the positive electrode tab. The clamping space can firmly fix the battery 9 tab, ensuring the stability of current conduction and preventing increased resistance or test interruption due to poor contact.

[0026] The upper insulating pad 31, upper metal sheet 32, lower metal sheet 33, and insulating base 34 of the negative electrode are fixedly connected by the second fastener 6; the upper insulating pad 41, upper metal sheet 42, lower metal sheet 43, and insulating base 44 of the positive electrode are fixedly connected by the third fastener 7. The insulating base 34 of the negative electrode and the insulating base 44 of the positive electrode are respectively fixedly connected to the lower clamping plate 2 by the fourth fastener 8. The first fastener 5, the second fastener 6, the third fastener 7, and the fourth fastener 8 can be screws, bolts, or studs.

[0027] The negative terminal 331 and the positive terminal 431 can be one of a threaded hole, a through hole, a terminal post, or a quick-connect terminal. In this embodiment, a threaded hole is preferred, and the terminal at the end of the wire is crimped by a tightening screw.

[0028] In use, first place the soft-pack battery 9 between the upper clamping plate 1 and the lower clamping plate 2, with the positive electrode tab of the battery 9 extending into the clamping space of the positive electrode tab and the negative electrode tab extending into the clamping space of the negative electrode tab. Secure the battery 9 by tightening the first fastener 5. Then, lock the layers of the negative electrode tab clamp 3 and the positive electrode tab clamp 4 with the second fastener 6 and the third fastener 7 respectively, thus firmly clamping the battery 9 tabs. Finally, vertically place the clamp with the assembled battery 9 into the oil bath. When wiring, since both the positive terminal 431 and the negative terminal 331 face upwards, the operator can connect the negative and positive current wires vertically downwards to the corresponding terminals from directly above the clamp, for example, by tightening the wire terminals in the threaded holes with screws. The current and voltage wires hang naturally without any large-angle bending or twisting.

[0029] It is understood that the specific embodiments described above are merely for explaining the relevant utility model and not for limiting the utility model. It should also be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict with each other. All equivalent structural transformations made based on the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly included within the protection scope of this utility model.

Claims

1. A battery clamp, characterized in that, Includes upper clamp, lower clamp, negative electrode clip, and positive electrode clip. The upper clamping plate and the lower clamping plate are connected by a first fastener to clamp the battery; The negative electrode clip and the positive electrode clip are respectively fixedly installed on the upper surface of the lower clamp plate; The top of the negative electrode clip is provided with a negative terminal for connecting the negative electrode wire; The top of the positive electrode clip is provided with a positive terminal for connecting the positive electrode wire; The positive and negative terminals are both facing upwards, and the center line connecting the positive and negative terminals is parallel to the upper surface of the lower clamping plate.

2. The battery clamp according to claim 1, characterized in that, The negative electrode clip includes an upper negative electrode insulating pad, an upper negative electrode metal sheet, a lower negative electrode metal sheet, and a negative electrode insulating base, which are stacked sequentially from top to bottom; the positive electrode clip includes an upper positive electrode insulating pad, an upper positive electrode metal sheet, a lower positive electrode metal sheet, and a positive electrode insulating base, which are stacked sequentially from top to bottom; the negative electrode connection port is located on the upper surface of the lower negative electrode metal sheet, and the positive electrode connection port is located on the upper surface of the lower positive electrode metal sheet.

3. The battery clamp according to claim 2, characterized in that, The upper and lower metal plates of the negative electrode are arranged opposite each other to form a clamping space for clamping the negative electrode tab of the battery; the upper and lower metal plates of the positive electrode are arranged opposite each other to form a clamping space for clamping the positive electrode tab of the battery.

4. The battery clamp according to claim 2, characterized in that, The upper insulating pad, upper metal sheet, lower metal sheet, and insulating base of the negative electrode are fixedly connected by a second fastener; the upper insulating pad, upper metal sheet, lower metal sheet, and insulating base of the positive electrode are fixedly connected by a third fastener.

5. The battery clamp according to claim 1, characterized in that, The negative terminal and the positive terminal are one of the following: threaded hole, through hole, terminal post, or quick-connect terminal.

6. The battery clamp according to claim 2, characterized in that, The negative electrode insulating base and the positive electrode insulating base are respectively fixedly connected to the lower clamping plate by the fourth fastener.

7. The battery clamp according to claim 4, characterized in that, Both the second and third fasteners are screws, bolts, or studs.

8. The battery clamp according to claim 6, characterized in that, The fourth fastener is a screw, bolt, or stud.

9. The battery clamp according to claim 1, characterized in that, The first fastener is a screw, bolt or stud.

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