Lithium battery voltage and internal resistance testing device

Abstract

The utility model discloses a lithium battery voltage internal resistance testing device, and relates to the technical field of lithium battery voltage internal resistance testing. The relative distance between the side plates is adjustable, and the side plates are connected together. V-shaped supporting plates are arranged on the opposite inner side walls of the two side plates correspondingly. A height-adjustable mounting plate with the top extending out of the top of the side plate is mounted on the outer side wall of the side plate, and an ejector pin mechanism is mounted on the mounting plate; during use, two ends of a columnar lithium battery are respectively placed in the V-shaped supporting plates for supporting, and the two ejector pin mechanisms are controlled to respectively contact with a positive electrode and a negative electrode of the lithium battery. According to the utility model, the mounting plates are respectively mounted on the two side plates with the adjustable relative distance, and the ejector pin mechanisms are mounted on the mounting plates, so that the relative distance between the two side plates and the distance between the ejector pin mechanisms and the tops of the side plates are adjusted according to the size of a columnar lithium battery to be detected during use; therefore, the two ejector pin mechanisms can respectively abut against the positive and negative electrodes at the two ends of the columnar lithium battery.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery voltage and internal resistance testing, and particularly relates to a lithium battery voltage and internal resistance testing device. Background Technique

[0002] The actual internal resistance of a lithium-ion battery refers to the resistance encountered when current flows through the battery internally during operation. A large internal resistance of the battery will generate a large amount of Joule heat (according to the formula: E = I^2RT) during normal use of the battery, causing the battery temperature to rise, resulting in a decrease in the discharge working voltage of the battery and a shortening of the discharge time, which seriously affects the battery performance, life, etc.

[0003] For example, a battery internal resistance detection device disclosed in CN220271525U includes a base, two probe mechanisms, and a fixing mechanism for fixing the battery. The fixing mechanism is detachably installed on the base, and the two probe mechanisms are slidably installed on the base. The positions of the two probe mechanisms on the base are adjustable. One probe mechanism contacts the positive electrode of the battery, and the other probe mechanism contacts the negative electrode of the battery. The utility model can cope with the internal resistance detection of different batteries and detect batteries with different-position electrodes through two probe mechanisms with adjustable positions. However, it cannot perform voltage and internal resistance tests on cylindrical lithium batteries of different models during actual use. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a lithium battery voltage and internal resistance testing device. By respectively installing a mounting plate on two side plates with adjustable relative distance, and the mounting height difference between the mounting plate and the side plate is adjustable, and a thimble mechanism is installed on the mounting plate, the problem that the existing background technology cannot perform voltage and internal resistance tests on cylindrical lithium batteries of different models during use is solved.

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] The utility model is a lithium battery voltage and internal resistance testing device, which includes a pair of side plates with adjustable relative distance and connected together. V-shaped support plates are respectively arranged on the relative inner side walls of the two side plates. A mounting plate with an adjustable height protruding from the top of the side plate is installed on the outer side wall of the side plate, and a thimble mechanism is installed on the mounting plate. During use, the two ends of the cylindrical lithium battery are respectively placed in the V-shaped support plates for support, and the two thimble mechanisms are controlled to respectively contact the positive electrode and the negative electrode of the lithium battery.

[0007] Further, at least one rectangular hole A is vertically formed on the side wall of the mounting plate, a rectangular convex block A which is in guiding fit with the rectangular hole A is arranged on the outer side wall of the side plate, and a fixing stud A is arranged on the rectangular convex block A; a cushion plate A is further included, a through hole A for the fixing stud A to pass through is formed on the cushion plate A, one side of the cushion plate A abuts against the outer side surface of the mounting plate, and a nut A which abuts against one side of the cushion plate A is threadedly connected to the end of the fixing stud A.

[0008] Further, two connecting sleeves are arranged on one side of the side plate, the two connecting sleeves arranged on the two side plates are connected by a connecting rod, and a locking bolt is arranged at the end of the connecting sleeve.

[0009] Further, connecting plates A and B are respectively arranged on the opposite side walls of the two side plates, at least one rectangular hole B is formed in the connecting plate A along the length direction thereof, a rectangular convex block B which is in guiding fit with the rectangular hole B is arranged on the bottom side surface of the connecting plate B, and a fixing stud B is arranged on the rectangular convex block B; a cushion plate B is further included, a through hole B for the fixing stud B to pass through is formed on the cushion plate B, one side of the cushion plate B abuts against the bottom side surface of the connecting plate A, and a nut B which abuts against one side of the cushion plate B is threadedly connected to the end of the fixing stud B.

[0010] The utility model has the following beneficial effects:

[0011] By respectively installing a mounting plate on two side plates with adjustable relative distance, and the installation height difference between the mounting plate and the side plate is adjustable, and a thimble mechanism is installed on the mounting plate. During use, the relative distance between the two side plates and the distance between the thimble mechanism and the top of the side plate are adjusted according to the size of the cylindrical lithium battery to be detected, so as to ensure that the two thimble mechanisms can respectively abut against the positive and negative electrodes at both ends of the cylindrical lithium battery.

[0012] Certainly, it is not necessary for any product implementing the utility model to simultaneously achieve all the above advantages. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0014] Figure 1 Structural schematic diagram of the voltage and internal resistance testing device of the utility model Figure 1 ;

[0015] Figure 2 For Figure 1 Partial enlarged view at A in

[0016] Figure 3 Structural schematic of the voltage and internal resistance testing device of the present utility model Figure 2 ;

[0017] Figure 4 is Figure 3 The partial enlarged view at position B in Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] In the description of the present utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or position relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0020] Please refer to Figure 1 and 3 As shown, the present utility model is a lithium battery voltage and internal resistance testing device, including two side plates 2. At the same time, a V-shaped support plate 21 is respectively arranged on the relative inner side walls of the side plates 2, and a mounting plate 1 with the top protruding from the top of the side plate 2 is installed on the outer side wall of the side plate 2, and a thimble mechanism 10 is installed on the mounting plate 1; during use, the installation distance of the side plates 2 can be adjusted adaptively according to the length of the columnar lithium battery to be detected, and then both ends of the columnar lithium battery are respectively placed in the V-shaped support plate 21 for support. At this time, the two thimble mechanisms 10 respectively contact the positive and negative electrodes of the lithium battery.

[0021] In the above, when detecting columnar lithium batteries with different outer diameters are placed on the V-shaped support plate 21, at this time, relative to the side plate 2, the heights of the positive and negative electrodes of the columnar lithium battery will change, that is, the larger the outer diameter of the columnar lithium battery, the higher the heights of the positive and negative electrodes of the columnar lithium battery relative to the bottom of the V-shaped support plate 21. At this time, it is necessary to control and adjust the installation height of the thimble mechanism 10 to adapt to the above changes.

[0022] Specifically, as Figure 2, in the above, in order to facilitate the adjustment of the installation height of the thimble mechanism 10, two rectangular holes A11 are vertically formed on the side wall of the mounting plate 1. At the same time, a rectangular protrusion A24 is provided on the outer side wall of the side plate 2. The rectangular protrusion A24 extends into the rectangular hole A11 and is in guiding cooperation with the rectangular hole A11, so as to maintain the stability of the mounting plate 1 and the side plate 2 during the up and down movement in use. At the same time, a fixing stud A241 is provided on the rectangular protrusion A24, and a nut A242 is threadedly connected to the end of the fixing stud A241. In order to facilitate the control of fixing the side plate 2 and the mounting plate 1 by using the nut A242, a spacer plate A13 is provided in the area between the nut A242 and the mounting plate 1. A through hole A for the fixing stud A241 to pass through is formed on the spacer plate A13, and one side of the spacer plate A13 abuts against the outer side surface of the mounting plate 1, and one side of the nut A242 abuts against the spacer plate A13.

[0023] Specifically, the following two connection methods are provided, and the installation distance between the two side plates 2 can be adaptively adjusted in both of the following two connection methods.

[0024] Method 1: As Figure 1 , two connecting sleeves 20 are provided on one side of the side plate 2. The two connecting sleeves 20 provided on the two side plates 2 are connected by a connecting rod 22, and a locking bolt 23 is provided at the end of the connecting sleeve 20. Based on the above, in order to quickly adjust the installation distance between the two side plates 2 according to the model of the cylindrical lithium battery, scale lines indicating the model are provided at one end or both ends of the connecting rod 22. When it is necessary to detect the corresponding model of the cylindrical lithium battery, control the end face of the connecting sleeve 20 to align with the corresponding scale line.

[0025] Method 2: As Figures 3-4, connecting plates A25 and connecting plates B26 are respectively arranged on the opposite side walls of the two side plates 2. Two rectangular holes B251 are formed in the connecting plate A25 along its length direction. A rectangular protrusion B261 is arranged on the bottom side surface of the connecting plate B26. The rectangular protrusion B261 extends into the rectangular hole B251 and is in guiding cooperation with the rectangular hole B251, so as to maintain the stability of the movement process under the cooperation of the connecting plate A25 and the connecting plate B26 during use; at the same time, a fixing stud B262 is arranged on the rectangular protrusion B261, and a nut B263 is threadedly connected to the end of the fixing stud B262; in order to facilitate the fixed connection of the connecting plate A25 and the connecting plate B26 during use, a spacer plate B252 is placed between the nut B263 and the connecting plate A25. A rectangular protrusion A24 that is in guiding cooperation with the rectangular hole A11 is arranged on the outer side wall of the side plate 2; a spacer plate A13 is further included. One side of the spacer plate A13 abuts against the outer side surface of the mounting plate 1, and a nut A242 that abuts against one side of the spacer plate A13 is threadedly connected to the end of the fixing stud A241; then a through hole B for the fixing stud B262 to pass through is formed in the spacer plate B252. One side of the spacer plate B262 abuts against the bottom side surface of the connecting plate A25, and one side of the nut B263 abuts against the spacer plate B252.

[0026] In the description of this specification, the descriptions with reference to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0027] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A lithium battery voltage and internal resistance testing device, characterized in that: Comprising a pair of side plates (2) with adjustable relative distance and connected together; On the relative inner side walls of the two side plates (2), a V-shaped support plate (21) is respectively arranged; on the outer side wall of the side plate (2), a mounting plate (1) with an adjustable height protruding from the top of the side plate (2) is installed, and a thimble mechanism (10) is installed on the mounting plate (1); During use, both ends of a columnar lithium battery are respectively placed in the V-shaped support plate (21) for support, and two thimble mechanisms (10) are controlled to respectively contact the positive electrode and the negative electrode of the lithium battery.

2. The lithium battery voltage and internal resistance testing device according to claim 1, characterized in that On the side wall of the mounting plate (1), at least one rectangular hole A (11) is vertically opened, on the outer side wall of the side plate (2), a rectangular convex block A (24) guidingly matched with the rectangular hole A (11) is arranged, and a fixing stud A (241) is arranged on the rectangular convex block A (24); It further includes a cushion plate A (13), on the cushion plate A (13), a through hole A for the fixing stud A (241) to pass through is opened, one side of the cushion plate A (13) abuts against the outer side surface of the mounting plate (1), and at the end of the fixing stud A (241), a nut A (242) abutting against one side of the cushion plate A (13) is threadedly connected.

3. The lithium battery voltage and internal resistance testing device according to claim 1, wherein, On one side of the side plate (2), two connecting sleeves (20) are arranged, between the two connecting sleeves (20) arranged on the two side plates (2), they are connected by a connecting rod (22), and a locking bolt (23) is arranged at the end of the connecting sleeve (20).

4. The lithium battery voltage and internal resistance testing device according to claim 1, characterized in that, On the relative side walls of the two side plates (2), a connecting plate A (25) and a connecting plate B (26) are respectively arranged, on the connecting plate A (25), at least one rectangular hole B (251) is opened along its length direction, on the bottom side surface of the connecting plate B (26), a rectangular convex block B (261) guidingly matched with the rectangular hole B (251) is arranged, and a fixing stud B (262) is arranged on the rectangular convex block B (261); It further includes a cushion plate B (252), on the cushion plate B (252), a through hole B for the fixing stud B (262) to pass through is opened, one side of the cushion plate B (262) abuts against the bottom side surface of the connecting plate A (25), and at the end of the fixing stud B (262), a nut B (263) abutting against one side of the cushion plate B (252) is threadedly connected.

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