Multipoint detection resistance detection structure for cylindrical lithium battery

Abstract

The utility model discloses a multi-point detection cylindrical lithium battery resistance detection structure, which relates to the technical field of battery resistance detection, and comprises a battery compartment, the center of the inner cavity of the battery compartment is provided with a placement slot position, the top end of the inner cavity of the placement slot position is slidably connected with a positive electrode abutting member, and the top end of the inner cavity of the battery compartment is provided with a conductive carriage. Only one placement groove position is needed for being compatible with cylindrical lithium batteries of different specifications, when the batteries are placed in the placement groove position, the tops of the batteries can jack up the positive electrode abutting component upwards, the compression springs generate downward resilience force after being extruded, the positive electrode abutting component is pushed to be tightly attached to the positive electrodes of the batteries, and the cylindrical lithium batteries are placed in the placement groove position. The battery is prevented from deviating and separating through the limiting groove, compared with a traditional device, space occupation of multiple groove positions is omitted, the internal structure of the device is greatly simplified, the size and the weight are greatly reduced, and the requirement of a user needing to carry the device outdoors for portability is better met.

Description

Technical Field

[0001] This utility model relates to the field of battery resistance detection technology, specifically a resistance detection structure for cylindrical lithium batteries with multi-point detection. Background Technology

[0002] Cylindrical lithium batteries are chemical energy storage devices characterized by their cylindrical shape. They are mainly composed of core components such as positive electrode, negative electrode, electrolyte, and separator. Their technology is mature and highly standardized. Due to their strong production consistency, they can stably provide power and are widely used in laptops, power tools, and some electric vehicles. They are a common battery type for consumer electronics and small power devices.

[0003] To accommodate multiple battery models, existing cylindrical lithium battery testing structures typically involve directly creating battery slots for various specifications inside the device and placing conductive springs at both ends of these slots for resistance testing. Since multiple battery slots need to be created simultaneously inside the device, this significantly increases its size and structural complexity, making it inconvenient for users who frequently need to carry the device. Therefore, we provide a multi-point resistance testing structure for cylindrical lithium batteries. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a resistance detection structure for cylindrical lithium batteries with multi-point detection.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a resistance detection structure for a cylindrical lithium battery with multi-point detection, including a battery compartment, a placement slot is provided in the center of the inner cavity of the battery compartment, and a positive electrode abutment member is slidably connected to the top of the inner cavity of the placement slot, a conductive slide is installed at the top of the inner cavity of the battery compartment, and conductive grooves are provided on both sides of the inner cavity of the conductive slide, a compression spring is abutted at the top of the inner wall of the conductive slide, and a negative electrode contact piece is added to the bottom of the inner wall of the placement slot.

[0006] As mentioned above, multiple indicator lights are provided on one side of the top of the battery compartment.

[0007] As described above, multiple metal lugs are added to both sides of the outer wall of the positive electrode contacting member. The outer wall of the metal lugs is tightly fitted with the inner wall of the conductive groove, and the outer wall of the metal lugs is slidably connected to the inner wall of the conductive groove.

[0008] As mentioned above, the bottom of the inner cavity of the conductive groove is a closed structure.

[0009] As described above, the outer wall of the bottom end of the compression spring abuts against the positive electrode contact member.

[0010] As described above, the positive electrode contacting component has a contact arc surface on one side of its bottom surface, and a limiting groove is formed at the center of the bottom surface.

[0011] Compared with existing technologies, this multi-point detection resistance detection structure for cylindrical lithium batteries has the following advantages:

[0012] I. This utility model requires only one placement slot to accommodate cylindrical lithium batteries of different specifications. When the battery is placed in, its top will push the positive electrode abutment component upward. After being compressed, the compression spring generates a downward rebound force, pushing the positive electrode abutment component to fit tightly against the positive electrode of the battery. The limiting groove prevents the battery from shifting or detaching. Compared with traditional devices, it saves the space occupied by multiple slots, greatly simplifies the internal structure of the device, and significantly reduces the size and weight, which better meets the needs of users who need to carry it out for portability.

[0013] II. This utility model utilizes the contact arc surface opened on the bottom surface of the positive electrode contacting component. When the user first contacts the negative electrode of the battery with the negative electrode contact piece, and then presses the positive electrode of the battery into the placement groove, the outer wall of the top of the battery will apply pressure to the contact arc surface, forcing the positive electrode contacting component to slide upward. At the same time, the positive electrode contact point at the top of the battery is embedded in the limiting groove, completing the positioning of the battery.

[0014] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a side perspective view of the present invention.

[0017] Figure 3 This is a side-section three-dimensional structural diagram of the positive electrode contacting component of this utility model;

[0018] Figure 4 This is a side-section three-dimensional structural diagram of the conductive slide of this utility model;

[0019] Figure 5 This is a partial three-dimensional structural diagram of the positive electrode contacting component of this utility model.

[0020] In the diagram: 1. Battery compartment; 101. Mounting slot; 102. Positive electrode contact component; 103. Conductive slide; 104. Conductive slide groove; 105. Compression spring; 106. Negative electrode contact piece; 107. Metal lug; 108. Contact arc surface; 109. Limiting groove;

[0021] 2. Indicator lights. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1-5 As shown, this utility model provides a technical solution: a resistance detection structure for a cylindrical lithium battery with multi-point detection, including a battery compartment 1, a placement slot 101 is opened in the center of the inner cavity of the battery compartment 1, and a positive electrode abutment member 102 is slidably connected to the top of the inner cavity of the placement slot 101, a conductive slide 103 is installed at the top of the inner cavity of the battery compartment 1, and conductive grooves 104 are opened on both sides of the inner cavity of the conductive slide 103, a compression spring 105 is abutted at the top of the inner wall of the conductive slide 103, and a negative electrode contact piece 106 is added to the bottom of the inner wall of the placement slot 101.

[0024] When the user contacts the negative terminal of the battery with the negative contact piece 106 and then presses the positive terminal of the battery into the placement slot 101, the outer wall of the top of the battery will apply pressure to the contact arc surface 108, forcing the positive contact member 102 to slide upward. At the same time, the positive contact at the top of the battery is embedded in the limiting groove 109, completing the positioning of the battery. When the positive contact member 102 is in stable contact with the positive terminal of the battery and the negative contact piece 106 is in stable contact with the negative terminal of the battery, the metal lug 107 is connected to the conductive slide 103 through the conductive slide groove 104, forming a complete detection circuit. At this time, multiple indicator lights 2 on one side of the top of the battery compartment 1 will light up simultaneously, completing the detection of the battery resistance.

[0025] like Figure 1 As shown, multiple indicator lights 2 are provided on one side of the top of the battery compartment 1.

[0026] Indicator light 2 serves as the status feedback component of this device, and can display the connectivity status of different detection points in real time. The extinguishing or flashing of indicator light 2 can help users quickly determine whether the detection is effective.

[0027] like Figure 4 and Figure 5 As shown, multiple metal lugs 107 are added to both sides of the outer wall of the positive electrode contacting member 102. The outer wall of the metal lug 107 is tightly fitted with the inner wall of the conductive groove 104, and the outer wall of the metal lug 107 is slidably connected to the inner wall of the conductive groove 104.

[0028] The metal lugs 107 on both sides of the outer wall of the positive electrode contact member 102 are tightly attached to and slidably connected to the inner wall of the conductive slide 104. The metal material ensures the conductivity of the positive electrode member and the conductive slide 103 while constraining the movement direction of the positive electrode contact member 102.

[0029] like Figure 4 As shown, the bottom of the inner cavity of the conductive groove 104 is a closed structure.

[0030] The closed structure at the bottom of the inner cavity of the conductive groove 104 can effectively limit the sliding range of the metal lug 107. When the positive electrode contact member 102 slides down to the limit position due to the short length of the battery, the metal lug 107 will be blocked by the bottom of the groove, preventing it from falling out of the conductive groove 104.

[0031] like Figure 3 As shown, the outer wall of the bottom end of the compression spring 105 abuts against the positive electrode contact member 102.

[0032] The design of the compression spring 105's bottom outer wall abutting against the positive electrode contact member 102 allows it to continuously apply downward pressure through elastic deformation: when batteries of different lengths are placed in the placement slot 101, the positive electrode contact member 102 is pushed up to compress the spring 105, and the spring's rebound force pushes the member to press tightly against the positive electrode of the battery, ensuring tight contact.

[0033] like Figure 5 As shown, a contact arc surface 108 is provided on one side of the bottom surface of the positive electrode contacting member 102.

[0034] When the contact arc surface 108 of the bottom surface of the positive electrode contacting member 102 comes into contact with the positive electrode of the cylindrical battery, it can force the positive electrode contacting member 102 to slide upward, thereby achieving automatic positioning of the battery.

[0035] like Figure 5 As shown, a limiting groove 109 is provided at the center of the bottom surface of the positive electrode contacting member 102.

[0036] The limiting groove 109 at the center of the bottom surface of the positive electrode contact member 102 engages with the protruding structure on the top of the cylindrical lithium battery. When the battery is placed in the placement slot 101, the top of the battery can be embedded in the limiting groove 109, reducing the offset caused by the lateral sliding of the battery during testing and ensuring the precise alignment of the positive and negative electrode contact points.

[0037] Working principle: The user vertically places the cylindrical lithium battery to be tested into the placement slot 101 of the battery compartment 1. First, the negative terminal at the bottom of the battery abuts against the negative terminal contact piece 106 at the bottom of the inner wall of the placement slot 101. At this time, the positive terminal at the top of the battery aligns upward with the bottom surface of the positive terminal contact member 102. The protruding cap at the top of the battery will naturally embed into the limiting groove 109, completing the initial lateral positioning and preventing the battery from sliding or shifting left and right during the testing process. Then, gently press the top of the battery. The outer wall of the positive terminal begins to contact the contact arc surface 108 of the bottom surface of the positive terminal contact member 102. The outer wall of the battery begins to force the positive terminal contact member 102 to move upward. At the same time, the positive terminal contact member 102 presses upward against the compression spring 105 at the top of the inner wall of the conductive slide 103. After the spring is compressed, it generates a downward rebound force, pushing the positive terminal contact member 102 to tightly fit against the positive terminal of the battery. When the positive terminal contact member 102 is in contact with the positive terminal of the battery and the negative terminal contact piece 106 is in contact with the negative terminal of the battery, the positive terminal contact member 102 is in contact with the positive terminal of the battery. When in stable contact, the metal lug 107 is connected to the conductive slide 103 through the conductive slide groove 104, forming a complete detection circuit. At this time, multiple indicator lights 2 on one side of the top of the battery compartment 1 light up simultaneously. The user can quickly determine whether the detection is effective by whether the multiple indicator lights 2 are flashing. The top indicator light 2 corresponds to the positive terminal of the battery, and the bottom indicator light 2 corresponds to the negative terminal. When one of the indicator lights 2 flashes, it means that the resistance of the corresponding end, such as the negative or positive terminal, has not reached the specified requirement. If the indicator light 2 is constantly lit, it means that the end of the battery meets the requirements. If the user replaces the battery with a battery of different lengths, the positive terminal contact member 102 will automatically adjust its position according to the change in battery length. The longer battery will push the positive terminal contact member 102 upward to a higher position, and the compression spring 105 will be further compressed. The shorter battery will cause the positive terminal contact member 102 to slide downward under the action of the spring rebound force, always maintaining close contact with the positive terminal of the battery.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A resistance detection structure for a cylindrical lithium battery with multi-point detection, comprising a battery compartment (1), characterized in that: The battery compartment (1) has a mounting slot (101) in the center of its inner cavity, and a positive electrode contact member (102) is slidably connected to the top of the mounting slot (101). A conductive slide (103) is installed at the top of the inner cavity of the battery compartment (1), and conductive grooves (104) are provided on both sides of the inner cavity of the conductive slide (103). A compression spring (105) is abutted against the top of the inner wall of the conductive slide (103), and a negative electrode contact piece (106) is added to the bottom of the inner wall of the mounting slot (101).

2. The resistance detection structure for a cylindrical lithium battery with multi-point detection according to claim 1, characterized in that: Multiple indicator lights (2) are provided on one side of the top of the battery compartment (1).

3. The resistance detection structure for a cylindrical lithium battery with multi-point detection according to claim 2, characterized in that: Multiple metal lugs (107) are added to both sides of the outer wall of the positive electrode contact member (102). The outer wall of the metal lug (107) is tightly fitted with the inner wall of the conductive groove (104), and the outer wall of the metal lug (107) is slidably connected to the inner wall of the conductive groove (104).

4. The resistance detection structure for a cylindrical lithium battery with multi-point detection according to claim 3, characterized in that: The bottom of the inner cavity of the conductive groove (104) is a closed structure.

5. The resistance detection structure for a cylindrical lithium battery with multi-point detection according to claim 1, characterized in that: The outer wall of the bottom end of the compression spring (105) abuts against the positive electrode contact member (102).

6. The resistance detection structure for a cylindrical lithium battery with multi-point detection according to claim 1, characterized in that: The positive electrode contacting member (102) has a contact arc surface (108) on one side of its bottom surface.

7. The resistance detection structure for a cylindrical lithium battery with multi-point detection according to claim 6, characterized in that: The positive electrode contact member (102) has a limiting groove (109) at the center of its bottom surface.

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