battery holder

Abstract

This invention discloses a battery holder for mounting a battery. It includes an insulating base with a receiving cavity formed by a bottom wall and a surrounding wall. The surrounding wall has a mounting groove and two receiving grooves recessed along its vertical direction. The positive terminal has a main body mounted in the mounting groove, with side portions extending from both sides of the main body. The two side portions are mounted in corresponding receiving grooves. Each side portion has multiple positive electrode springs extending vertically in parallel. The positive electrode springs have positive electrode contact portions that enter the receiving cavity. The multiple positive electrode contact portions are arranged along the circumferential direction of the insulating base on the inner side of the surrounding wall and contact the side surface of the battery. The negative terminal has multiple negative electrode springs that contact the bottom surface of the battery. This increases the contact points between the positive and negative terminals and the battery, and stably holds the battery, reducing the vibration amplitude of the battery. This ensures good contact between the positive and negative terminals and the battery, allowing the battery to maintain a stable voltage transmission.

Description

[Technical Field]

[0001] This invention relates to a battery holder, and more particularly to a battery holder with good shock resistance. [Background Technology]

[0002] Button batteries are widely used in computers due to their small size. They are typically installed in a battery holder on the computer motherboard to power the memory. Existing battery holders include an insulating base, a positive terminal, and a negative terminal. The insulating base has a battery housing area. The positive terminal includes a fixing part fixed to the side wall of the battery housing area. Both sides of the fixing part bend and extend along the inner wall of the battery housing area to form arc-shaped contact pieces. The two ends of the contact pieces extend to form contact portions. Each contact portion, connected to the contact piece, extends in the opposite direction to form an inwardly curved spring. The curved spring has a large curvature, and its end forms a protruding contact point. Both the contact pieces and the curved spring are located within the battery housing area. When the button battery is installed vertically in the battery housing area, the contact pieces and the curved spring contact the side surface of the button battery, and the negative terminal contacts the bottom surface of the button battery.

[0003] However, when the computer is in operation, the high-frequency components on the motherboard where the battery holder is located, as well as the fan of the cooling system, continuously vibrate. The contact between the battery holder on the motherboard and the button battery housed in the battery housing area is also affected by the vibration and shifts. Because the battery housing area needs to accommodate the curved contact piece and the bent spring, and the curved spring has a large curvature, the gap between the curved spring and the inner wall of the battery housing area is large. When the button battery is housed in the battery housing area, there is also a large gap between the side surface of the button battery and the inner wall of the battery housing area. Under the influence of high-frequency vibration, the positive and negative terminals are insufficient to stably hold the button battery, causing the button battery to shift due to vibration. This results in a large vibration amplitude for the button battery, and consequently, greater wear between the positive and negative terminals and the button battery. Frequent friction generates a large amount of metal shavings that adhere to the contact points between the positive and negative terminals and the button battery. This increases the contact resistance between the positive and negative terminals and the button battery, leading to a voltage drop at the positive and negative terminals of the button battery. This results in different voltages at the positive and negative terminals, causing problems such as poor contact, voltage drop, and signal loss at the customer end. Furthermore, both the contact piece and the curved spring are arc-shaped and arranged around the battery housing area, occupying a large space in the battery housing area and affecting the smooth installation of the button battery. This makes it difficult to install the button battery properly. In addition, the curved spring has a large curvature and its end forms a protruding contact. The curved spring is located above the contact piece. When the button battery is installed vertically in the housing cavity, the bottom surface of the button battery is easily hit by the curved spring, causing it to deform. Consequently, the protruding contact of the curved spring cannot firmly hold the battery.

[0004] Therefore, it is necessary to design a new battery holder to overcome the above problems. [Summary of the Invention]

[0005] The purpose of this invention is to provide an insulating base having a receiving cavity formed by a bottom wall and a surrounding wall. The surrounding wall has a mounting groove and two receiving grooves recessed along the vertical direction. The positive terminal has a main body that is mounted in the mounting groove, and side portions extending from both sides of the main body. The two side portions are mounted in corresponding receiving grooves. Each side portion has multiple positive electrode springs extending in the vertical direction arranged side by side. The positive electrode springs have positive electrode contact portions that enter the receiving cavity. The multiple positive electrode contact portions are arranged along the circumferential direction of the insulating base on the inner side of the surrounding wall and contact the side surface of the battery. The negative terminal has multiple negative electrode springs that contact the bottom surface of the battery. This increases the contact points between the positive and negative terminals and the battery. The multiple positive electrode contact portions firmly hold the battery along the circumferential direction of the insulating base, and the multiple negative electrode springs firmly abut against the battery to reduce the vibration amplitude of the battery. This results in good contact between the positive and negative terminals and the battery, enabling the battery to maintain a stable voltage transmission.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a battery holder for mounting a battery, characterized in that it comprises: an insulating base, wherein the insulating base has a surrounding wall and a bottom wall connected to the bottom end of the surrounding wall along its circumferential direction, the bottom wall and the surrounding wall together forming a receiving cavity with an upper opening, the surrounding wall having a mounting groove and two receiving grooves located on both sides of the mounting groove along its vertical direction, the mounting groove and the two receiving grooves being connected to the receiving cavity, a positive terminal being mounted on the insulating base, the positive terminal having a main body fixed to the mounting groove, a bent portion formed by bending one end of the main body, and an elastic plate portion extending from the bent portion along its vertical direction, a clearance space being provided between the elastic plate portion and the main body portion, the elastic plate portion partially entering the receiving cavity. The receiving cavity has two side portions extending from opposite sides of the main body. The two side portions are located on opposite sides of the elastic plate and are respectively accommodated in two receiving slots. Each side portion has a plurality of positive electrode springs extending in the vertical direction. Each positive electrode spring has a positive electrode contact portion protruding into the receiving cavity. The plurality of positive electrode contacts are arranged along the circumferential direction of the insulating base on the inner side of the enclosure. A negative terminal is fixed to the insulating base. The negative terminal has a plurality of negative electrode springs located at the bottom of the receiving cavity. When the battery is installed in the receiving cavity from top to bottom, the elastic plate portion abuts against the side surface of the battery and moves toward the main body. The plurality of positive electrode contacts are in elastic contact with the side surface of the battery, and the plurality of negative electrode springs are in elastic contact with the bottom surface of the battery.

[0007] Furthermore, each of the sides has a through groove, and at least three positive electrode springs are integrally extended upward from the lower edge of the through groove, with the end of each positive electrode spring disconnected from the upper edge of the through groove.

[0008] Furthermore, the main body includes a fixed plate and two turning plates connecting opposite sides of the fixed plate. The two turning plates are respectively connected to the two side portions. Each turning plate extends from the fixed plate toward the receiving cavity but does not exceed the inner wall surface of the enclosure. A protrusion is provided from the plate surface of the fixed plate toward the side away from the receiving cavity. A retaining portion is provided from the inner side surface of the mounting groove toward the receiving cavity above the protrusion. The bottom surface of the retaining portion blocks the top of the protrusion. At least one first protrusion is provided on the side edge of each turning plate away from the side portion. The first protrusion interferes with the inner wall surface of the mounting groove. At least one second protrusion is provided at the end of the side portion. The second protrusion interferes with the inner wall surface of the receiving groove.

[0009] Furthermore, the main body portion is further away from the central axis of the receiving cavity than the side portion, and the width of the mounting groove recessed from the inner wall surface of the enclosure along the central axis away from the receiving cavity is greater than the width of the receiving groove recess.

[0010] Furthermore, the elastic plate portion is closer to the central axis of the receiving cavity than the positive electrode spring piece. The elastic plate portion has a limiting piece protruding towards the receiving cavity. The limiting piece is inclined downwards towards the receiving cavity from top to bottom to form a first guiding slope. Each positive electrode spring piece has a second guiding slope at its upper end. When the battery is assembled downwards, the first guiding slope and the second guiding slope sequentially guide the battery into the receiving cavity to elastically abut against the positive electrode contact portion. When the battery is assembled in place, the bottom of the limiting piece blocks the top surface of the battery downwards.

[0011] Furthermore, the elastic plate portion has a first through hole and a second through hole. The first through hole is located above the second through hole. The portion of the elastic plate portion located at the upper edge of the first through hole abuts against the side surface of the battery. The second through hole is located in the lower section of the elastic plate portion and extends to the curved portion. The first through hole and the second through hole are at least partially located on the same vertical cross section.

[0012] Furthermore, the top of the elastic plate has an operating part, which is inclined from top to bottom toward the receiving cavity. The elastic plate has a limiting arm that bends and extends on both sides of the operating part. The enclosure has a stop part that protrudes upward on both sides of the mounting groove. Each stop part is located inside the limiting arm to limit the displacement of the elastic plate toward the receiving cavity.

[0013] Furthermore, the top of the enclosure wall protrudes at least one upper limit portion toward the receiving cavity, and the bottom wall protrudes at least one overpressure protection portion in the vertical direction. The bottom surface of the upper limit portion blocks the top surface of the battery, and the top surface of the overpressure protection portion supports the bottom surface of the battery.

[0014] Furthermore, the inner wall of the enclosure protrudes at least one horizontal limiting part towards the receiving cavity, the top of the horizontal limiting part is lower than the top of the upper limiting part, the enclosure is recessed in the vertical direction at least two grooves, the two grooves are distributed on opposite sides of the horizontal limiting part, the grooves connect the receiving cavity with the external space, and the horizontal limiting part elastically abuts against the side surface of the battery.

[0015] Furthermore, the negative terminal is provided with a plurality of relatively extended first negative electrode springs and a plurality of second negative electrode springs, and the negative terminal extends with at least one third negative electrode spring. The length of the third negative electrode spring is greater than the length of the first negative electrode spring and the length of the second negative electrode spring. The first negative electrode spring has a first contact portion, the second negative electrode spring has a second contact portion, and the third negative electrode spring has a third contact portion. Each first contact portion, each second contact portion, and each third contact portion are arranged in a triangular structure and all abut against the bottom surface of the battery.

[0016] Furthermore, the bottom wall is recessed downwards to form a first overvoltage protection groove and at least one second overvoltage protection groove, and a plurality of first negative electrode springs and a plurality of second negative electrode springs are located directly above the first overvoltage protection groove, and the third negative electrode spring is located directly above the second overvoltage protection groove.

[0017] Furthermore, the end of the third negative electrode spring away from the third contact portion is bent downward to form a bent portion, and a boss is provided on the bottom surface of the second overvoltage protection groove. The bent portion is located in the second overvoltage protection groove, and the third contact portion is located above the second overvoltage protection groove. When the battery elastically abuts against the third contact portion, the top surface of the boss supports the bottom surface of the bent portion.

[0018] Furthermore, each end of the negative terminal has a fixing part and a middle part connecting the two fixing parts. The bottom wall is provided with two fixing grooves in the vertical direction for the two fixing parts to be inserted. A plurality of first negative electrode springs and a plurality of second negative electrode springs extend opposite to each other on the opposite sides of the middle part. The first negative electrode springs have a first contact part protruding upward, the second negative electrode springs have a second contact part protruding upward, and the third negative electrode springs have a third contact part protruding upward. Two third negative electrode springs extend from the middle part and are located on the outermost sides of the plurality of first negative electrode springs and the plurality of second negative electrode springs respectively. The free ends of each first negative electrode spring and the free ends of each second negative electrode spring are spaced apart.

[0019] Furthermore, each of the two sides of the fixing part is provided with a protrusion, the two fixing parts are provided with a stop plate protruding opposite each other, the inner sidewall of each fixing groove is provided with a limiting groove opposite to the other fixing groove, each protrusion interferes with the side of the corresponding fixing groove, and the top wall of the limiting groove blocks the top of the stop plate.

[0020] Furthermore, the third negative electrode spring is provided with an elongated hole, which extends along the extension direction of the third negative electrode spring to the third contact portion.

[0021] Compared with the prior art, the battery holder designed in this invention has the following advantages:

[0022] The side portion is provided with multiple positive electrode springs extending vertically. Each positive electrode spring has a protruding positive electrode contact portion that enters the receiving cavity. The main body portion extends vertically, with the elastic plate portion also entering the receiving cavity. Compared to existing positive terminal arc-shaped contact pieces completely located within the receiving cavity, the vertical extension of the positive electrode springs and elastic plate portion more effectively prevents the positive terminal from occupying too much of the receiving cavity. This reduces the likelihood of collisions with the positive terminal during battery installation, allowing for smooth installation into the receiving cavity. It also reduces the distance between the side surface of the battery and the inner wall of the enclosure, effectively reducing battery vibration. Furthermore, the negative terminal has multiple negative electrode springs located at the bottom of the receiving cavity to abut against the bottom surface of the battery at multiple positions. The positive and negative terminals elastically abut against multiple points on the side surface of the battery along the circumferential direction, thereby increasing the number of contact points between the positive and negative terminals and the battery, as well as the contact points with the bottom and side surfaces of the battery. This results in a more stable contact between the positive and negative terminals and the battery, further effectively reducing the vibration amplitude of the battery, minimizing wear between the positive and negative terminals and the battery, and preventing metal shavings from adhering to the contact points. This stabilizes the contact impedance between the positive and negative terminals and the battery, ensuring a stable voltage transmission, stable client contact, and complete signal transmission. Ultimately, the positive and negative terminals elastically abut against the battery to form a good electrical connection. [Attached Image Description]

[0023] Figure 1 This is an exploded perspective view of the battery holder of the present invention;

[0024] Figure 2 This is a three-dimensional assembly diagram of the battery holder of the present invention;

[0025] Figure 3 for Figure 2 Top view;

[0026] Figure 4 for Figure 3 Schematic cross-sectional view along the AA direction;

[0027] Figure 5 A top view of the battery mounted in the battery holder of this invention;

[0028] Figure 6 for Figure 5 Cross-sectional view along the BB direction;

[0029] Figure 7 for Figure 5 Cross-sectional view along the CC direction;

[0030] Figure 8 This is a three-dimensional schematic diagram of the insulating base of the battery holder of the present invention;

[0031] Figure 9 This is a three-dimensional schematic diagram of the positive terminal of the battery holder of the present invention;

[0032] Figure 10 This is a three-dimensional schematic diagram of the negative terminal of the battery holder of the present invention.

[0033] Explanation of reference numerals in the accompanying drawings for the specific implementation methods:

[0034] Battery holder 100 Battery 200 Insulating base 1 Bottom wall 11 Overvoltage protection section 111 First overpressure protection groove 112 Second overpressure protection groove 113 1131 convex surface Fixed slot 114 Limiting groove 1141 Guiding surface 1142 Grooving 1143 Wall 12 Mounting slot 121 Cardholder 1211 Reception tank 122 Stop part 123 Upper limit section 124 Horizontal limiting part 125 Groove 126 Containment cavity 13 Positive extreme 2 Main body 21 Fixed plate 211 2111 bump Turning plate 212 First protrusion 2121 Side 22 Through slot 221 Positive electrode shrapnel 222 Positive contact 2221 Second guiding ramp 2222 Second protrusion 223 Bending part 23 Elastic plate section 24 Limiting plate 241 First guiding ramp 2411 First through hole 242 Second through hole 243 Operations Unit 244 Limiting arm 245 Give way 25 Negative extreme 3 Middle section 31 First negative electrode shrapnel 311 First contact part 3111 Second negative electrode spring 312 Second contact part 3121 Third negative electrode spring 313 Third contact section 3131 Bending part 3132 Elongated hole 3133 Fixing part 32 Thrust 321 322 stop plate

Detailed Implementation Methods

[0035] To facilitate a better understanding of the purpose, structure, features, and effects of this invention, the invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0036] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "width", "vertical", "relative", "vertical", "inclined", etc., indicate the orientation or positional relationship based on the direction or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specified orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0037] like Figures 1 to 10 As shown, the battery holder 100 of the present invention is a horizontal battery holder for mounting a battery 200. The battery holder 100 includes an insulating base 1 and a positive terminal 2 and a negative terminal 3 fixed to the insulating base 1. The battery 200 is housed in the insulating base 1. The negative terminal 3 is in contact with the bottom surface of the battery 200, and the positive terminal 2 is in contact with the top surface and the side surface of the battery 200.

[0038] like Figure 1 , Figure 3 , Figure 8As shown, the insulating base 1 has a surrounding wall 12 and a bottom wall 11 connected to the bottom end of the surrounding wall 12 along its circumferential direction. The bottom wall 11 and the surrounding wall 12 together form a receiving cavity 13 with an upper opening. The bottom wall 11 has at least one overpressure protection part 111 protruding in the vertical direction. In this embodiment, there are four overpressure protection parts 111. In other embodiments, there can be a different number of such parts. The bottom wall 11 has a first overpressure protection groove 112 and at least one second overpressure protection groove 113 recessed downwards. The bottom surface of the second overpressure protection groove 113 has a boss 1131 protruding upwards. In this embodiment, there are two second overpressure protection grooves 113. In other embodiments, there can be a different number of such grooves. The bottom wall 11 has a through-hole in the vertical direction. There are two fixing slots 114. The inner wall of each fixing slot 114 is recessed with a limiting groove 1141 opposite to the other fixing slot 114. The upper part of each fixing slot 114 has multiple guide surfaces 1142 extending downwards at an angle. Each fixing slot 114 has two slots 1143 extending through its sidewall in a vertical direction. The two slots 1143 are located on opposite sides of the limiting groove 1141, and each slot 1143 communicates with the corresponding fixing slot 114. This facilitates the reception of the negative terminal 3 within the insulating base 1. Even if wear between the positive terminal 2, the negative terminal 3, and the battery 200 generates metal shavings, the guide surfaces 1142 and the slots 1143 can easily remove these shavings. The battery holder 100 is discharged. The enclosure 12 has a mounting groove 121 recessed along the vertical direction and two receiving grooves 122 located on both sides of the mounting groove 121. The mounting groove 121 partially penetrates the bottom wall 11. The width of the mounting groove 121 recessed from the inner wall surface of the enclosure 12 along the central axis away from the receiving cavity 13 is greater than the width of the receiving grooves 122. The mounting groove 121 and the two receiving grooves 122 are all connected to the receiving cavity 13. A retaining part 1211 protrudes from the inner side of the mounting groove 121 toward the receiving cavity 13. A stop part 123 protrudes upward on both sides of the enclosure 12 on the mounting groove 121. The top of the enclosure 12 faces the receiving cavity 13. At least one upper limit portion 124 is provided. In this embodiment, there are two upper limit portions 124, but in other embodiments, there may be multiple portions of other numbers. The inner wall surface of the enclosure 12 protrudes from the receiving cavity 13 with at least one pair of horizontal limiting portions 125. The top of each horizontal limiting portion 125 is lower than the top of the upper limit portion 124. The enclosure 12 has a recessed groove 126 on each side corresponding to each horizontal limiting portion 125. The groove 126 connects the receiving cavity 13 to the external space. In this embodiment, there are three horizontal limiting portions 125, one pair of which are arranged opposite each other, and the other horizontal limiting portion 125 is arranged opposite to the positive terminal 2. There are six grooves 126.In other embodiments, there can be other numbers of multiple [items / units].

[0039] like Figure 1-7 as well as Figure 9As shown, the positive terminal 2 is mounted on the insulating base 1. The positive terminal 2 has a main body 21 fixed to the mounting groove 121, a bent portion 23 formed by bending one end of the main body 21, and an elastic plate portion 24 extending from the bent portion 23 in the vertical direction. A clearance space 25 is provided between the elastic plate portion 24 and the main body 21. A side portion 22 extends from opposite sides of the main body 21. The main body 21 is further away from the central axis of the receiving cavity 13 than the side portion 22. The two side portions 22 are located on both sides of the elastic plate portion 24 and are correspondingly accommodated in the two receiving grooves 122. Each side portion 22 is provided with a plurality of positive electrode springs 22 extending in the vertical direction. 2. In this embodiment, each side portion 22 of the positive terminal 2 extends with three positive electrode springs 222. In other embodiments, the positive electrode springs 222 extending from each side portion 22 can be a plurality of other numbers. Each side portion 22 has a through groove 221. At least three positive electrode springs 222 extend upward from the lower edge of the through groove 221 in parallel arrangement. The end of each positive electrode spring 222 is disconnected from the upper edge of the through groove 221. Each positive electrode spring 222 has a protruding positive electrode contact portion 2221 that enters the receiving cavity 13. The plurality of positive electrode contacts 2221 are arranged along the circumferential direction of the insulating base 1 on the inner side of the enclosure 12. Each positive electrode spring... The upper end of the 222 has a second guiding slope 2222, that is, the second guiding slope 2222 is located above the positive electrode contact portion 2221. The end of the side portion 22 has at least one second protrusion 223. The second protrusion 223 interferes with the inner wall surface of the receiving groove 122. In this embodiment, there is one second protrusion 223. In other embodiments, there can be multiple protrusions of other numbers. The main body portion 21 includes a fixing plate 211 and two turning plates 212 connecting opposite sides of the fixing plate 211. The two turning plates 212 are respectively connected to the two side portions 22, and each turning plate 212 extends from the fixing plate 211 toward the receiving cavity 13 without exceeding the specified distance. On the inner wall surface of the enclosure 12, a protrusion 2111 protrudes from the surface of the fixing plate 211 toward the side away from the receiving cavity 13. A retaining portion 1211 protrudes from the inner side of the mounting groove 121 toward the receiving cavity 13, located above the protrusion 2111. The bottom surface of the retaining portion 1211 blocks the top of the protrusion 2111. Each turning plate 212 has at least one first protrusion 2121 protruding from its edge away from the side portion 22. The first protrusion 2121 interferes with the inner wall surface of the mounting groove 121. In this embodiment, there is one first protrusion 2121; in other embodiments, there may be multiple protrusions. The elastic plate portion 24 partially enters the receiving cavity 13.The elastic plate portion 24 is closer to the central axis of the receiving cavity 13 than the positive electrode spring piece 222. A limiting piece 241 protrudes from the elastic plate portion 24 toward the receiving cavity 13. The limiting piece 241 slopes downward toward the receiving cavity 13 from top to bottom to form a first guiding slope 2411. The first guiding slope 2411 and the second guiding slope 2412 sequentially guide the battery 200 into the receiving cavity. The elastic plate portion 24 has a first through hole 242 and a second through hole 243, both located below the limiting piece 241. The first through hole 242 is located below the second through hole 243. Above the 43, the second through hole 243 is located in the lower section of the elastic plate portion 24 and extends to the bent portion 23, and the first through hole 242 is at least partially located on the same vertical section as the second through hole 243. The top of the elastic plate portion 24 has an operating portion 244, that is, the operating portion 244 is located above the limiting piece 241. The operating portion 244 is inclined from top to bottom toward the receiving cavity 13. The elastic plate portion 24 bends and extends a limiting arm 245 on both sides of the operating portion 244. Each of the stop portions 123 is located inside the limiting arm 245 to limit the displacement of the elastic plate portion 24 toward the receiving cavity 13.

[0040] like Figures 1 to 2 , Figures 6 to 7 , Figure 10As shown, the negative terminal 3 is fixed to the insulating base 1. The negative terminal 3 has a plurality of negative electrode springs located at the bottom of the receiving cavity 13. The plurality of negative electrode springs include a plurality of first negative electrode springs 311 and a plurality of second negative electrode springs 312 extending relative to each other, and at least one third negative electrode spring 313. The free ends of each first negative electrode spring 311 and the free ends of each second negative electrode spring 312 are spaced apart. The plurality of first negative electrode springs 311 and the plurality of second negative electrode springs 312 are all located directly above the first overvoltage protection groove 112. Each first negative electrode spring 311 has a first contact portion 3111, and each second negative electrode spring 312 has a second contact portion 3121. The electrode spring includes at least three first negative electrode springs 311, at least three second negative electrode springs 312, and at least two third negative electrode springs 313. The two third negative electrode springs 313 are respectively located on the outermost sides of the three first negative electrode springs 311 and the three second negative electrode springs 312. In this embodiment, there are three first negative electrode springs 311 and three second negative electrode springs 312, and two third negative electrode springs 313. In other embodiments, the first negative electrode springs 311 and the second negative electrode springs 312 can be set to other numbers, and the third negative electrode springs 313 can be set to one or other numbers. The third negative electrode springs 313 are located in the second overvoltage protection groove 113. At the top, the length of the third negative electrode spring 313 is greater than the length of the first negative electrode spring 311 and the second negative electrode spring 312. Each of the third negative electrode springs 313 has a third contact portion 3131. Each of the first contact portions 3111, each of the second contact portions 3121, and each of the third contact portions 3131 are arranged in a triangular structure, and the lines connecting each of the first contact portions 3111, each of the second contact portions 3121, and each of the third contact portions 3131 form a triangle. The end of the third negative electrode spring 313 away from the third contact portion 3131 is bent downward to form a bent portion 3132. The bent portion 3132 is located in the second overpressure protection groove 1. 13. The third contact portion 3131 is located above the second overvoltage protection groove 113. The third negative electrode spring 313 has a through-hole 3133. The through-hole 3133 extends along the extension direction of the third negative electrode spring 313 to the third contact portion 3131. The negative terminal 3 has a fixing portion 32 at each end and an intermediate portion 31 connecting the two fixing portions 32. The bottom wall 11 has two fixing grooves 114 for the two fixing portions 32 to be inserted vertically. The overvoltage protection portion 111 is higher than the intermediate portion 31 in the vertical direction. Multiple first negative electrode springs 311 and multiple second negative electrode springs 312 extend from opposite sides of the intermediate portion 31.The first negative electrode spring 311 has an upwardly protruding first contact portion 3111, the second negative electrode spring 312 has an upwardly protruding second contact portion 3121, and the third negative electrode spring 313 has an upwardly protruding third contact portion 3131. That is, the first contact portion 3111, the second contact portion 3121, and the third contact portion 3131 protrude upwards relative to the middle portion 31. Each fixing portion 32 has a protruding spike 321 on each side edge, and two fixing portions 32 have opposing protruding stop pieces 322. Each spike 321 interferes with the side surface of the corresponding fixing groove 114, and the top wall of the limiting groove 1141 blocks the top of the stop piece 322.

[0041] like Figures 5 to 7As shown, when the battery 200 is installed in the receiving cavity 13 from top to bottom, the operating part 244 first guides the battery 200 to move downwards, and then the first guiding inclined surface 2411 guides the battery 200 to continue moving downwards. At this time, the elastic plate part 24 partially abuts against the side surface of the battery 200 and moves towards the main body part 21. Further, the second guiding inclined surface 2222 guides the battery 200 into the receiving cavity 13 so as to elastically abut against the positive electrode contact part 2221. When the battery 200... When assembled, the bottom of the limiting piece 241 blocks the top surface of the battery 200 downwards. The portion of the elastic plate 24 located at the upper edge of the first through hole 242 abuts against the side surface of the battery 200. The positive terminal 2 has six positive contact portions 2221 that form six-point contact with the side surface of the battery 200. The plate surface of the elastic plate 24 abuts against the side surface of the battery 200 to form a seventh-point contact. The bottom of the limiting piece 241 contacts the top surface of the battery 200 to form a... The positive terminal 2 forms an eight-point contact with the battery 200, ensuring stable contact and effectively reducing vibration. Similarly, the negative terminal 3, with three first negative electrode springs 313, three second negative electrode springs 312, and two third negative electrode springs 313, also forms an eight-point contact with the bottom surface of the battery 200, ensuring stable contact. This further effectively reduces the vibration amplitude of the battery 200, and the positive terminal 2, the negative terminal 2 and the battery 200 each form an eight-point contact, making the abutment force distribution between the positive terminal 2, the negative terminal 3 and the battery 200 more balanced, so that the positive terminal 2 and the negative terminal 3 abut against the battery 200 more stably. When the battery 200 elastically abuts against the third contact part 3131, the top surface of the boss 1131 supports the bottom surface of the bent part 3132. Each of the first contact portion 3111, each of the second contact portion 3121, and each of the third contact portions 3131 are arranged in a triangular structure and all abut against the bottom surface of the battery 200. That is, the lines connecting each of the first contact portion 3111, each of the second contact portion 3121, and each of the third contact portions 3131 form a triangle. Therefore, each of the first contact portion 3111, each of the second contact portion 3121, and each of the third contact portions 3131 has stable contact with the battery 200.When the battery 200 is assembled in place, the bottom of the limiting piece 241 blocks the top surface of the battery 200 downwards, and the bottom surface of the upper limiting part 124 blocks the top surface of the battery 200, together restricting the upward displacement of the battery 200. The top surface of the overpressure protection part 111 supports the bottom surface of the battery 200, restricting the battery 200 from excessive downward displacement, thereby reducing the vibration amplitude of the battery 200 in the vertical direction. The multiple horizontal limiting parts 125 elastically abut against the side surfaces around the battery 200 to restrict the battery 200 in the horizontal direction and reduce the vibration amplitude of the battery 200 in the horizontal direction. When the battery 200 needs to be removed, the operating part 244 can be operated to move towards the main body 21, causing the elastic plate part 24 to move towards the main body 21, thereby reducing the clearance space 25. The elastic plate part 24 is finally completely received in the mounting groove 121, and the limiting piece 241 separates from the top surface of the battery 200, allowing the operator to remove the battery 200.

[0042] In summary, the battery holder 100 of the present invention has the following beneficial effects:

[0043] 1. The side portion 22 is provided with a plurality of positive electrode springs 222 extending in the vertical direction. The positive electrode springs 222 have a protruding positive electrode contact portion 2221 that enters the receiving cavity 13. The main body portion 21 extends in the vertical direction and the elastic plate portion 24 partially enters the receiving cavity 13. Compared with the existing positive terminal 2 where the arc-shaped contact piece is completely located in the receiving cavity 13, the positive electrode springs 222 and the elastic plate portion 24 extending in the vertical direction can more effectively prevent the positive terminal 2 from occupying too much of the receiving cavity 13. The battery 200 is less likely to collide with the positive terminal 2 during installation, allowing the battery 200 to be smoothly installed into the receiving cavity 13. At the same time, the distance between the side surface of the battery 200 and the inner wall surface of the enclosure 12 is reduced, effectively reducing the vibration amplitude of the battery 200. The negative terminal 3 has a plurality of negative electrode springs located at multiple positions at the bottom of the receiving cavity 13 to abut against the bottom surface of the battery 200. The positive electrode contact portion 2221 elastically abuts against multiple positions on the side surface of the battery 200 in the circumferential direction, thereby increasing the number of contact points between the positive electrode 2 and the negative electrode 3 and the battery 200, as well as the number of contact positions with the bottom and side surfaces of the battery 200. This results in a more stable contact between the positive electrode 2 and the negative electrode 3 and the battery 200, further effectively reducing the vibration amplitude of the battery 200, reducing wear on the contact points between the positive electrode 2, the negative electrode 3 and the battery 200, and preventing metal shavings from adhering to the contact points between the positive electrode 2, the negative electrode 3 and the battery 200. This stabilizes the contact impedance between the positive electrode 2, the negative electrode 3 and the battery 200, ensuring that the battery 200 maintains a stable voltage transmission. Consequently, the client contact is stable, signal transmission is complete, and the positive electrode 2, the negative electrode spring, and the battery 200 can firmly and elastically abut against each other to form a good electrical connection.

[0044] 2. Each side portion 22 is provided with a through groove 221. Three positive electrode springs 222 extend integrally upward from the lower edge of the through groove 221. The end of each positive electrode spring 222 is disconnected from the upper edge of the through groove 221, so that the positive electrode spring 222 has a better elastic effect, thereby better abutting against the side surface of the battery 200. At the same time, each positive electrode spring 222 extends in the vertical direction and protrudes the positive electrode contact portion 2221 towards the receiving cavity 13, which can both prevent the positive terminal 2 from occupying too much of the receiving cavity 13 and ensure that the positive terminal 2 and the battery 200 maintain a stable elastic abutment.

[0045] 3. The main body 21 includes a fixing plate 211 and two turning plates 212 connecting opposite sides of the fixing plate 211. The bottom surface of the mounting groove 121 blocks the bottom surface of the turning plates 212 to limit the downward displacement of the main body 21. Each turning plate 212 extends from the fixing plate 211 toward the receiving cavity 13 but does not exceed the inner wall surface of the enclosure 12, thus preventing the turning plates 212 from occupying the space of the receiving cavity 13. A protrusion 2111 protrudes from the plate surface of the fixing plate 211 toward the side away from the receiving cavity 13. A retaining part 1211 protrudes from the inner side of the mounting groove 121 toward the receiving cavity 13 and is located on the protrusion 211. Above 1, the bottom surface of the retaining part 1211 blocks the top of the protrusion 2111 to limit the upward displacement of the main body 21. Each of the turning plates 212 has a first protrusion 2121 protruding from one side edge away from the side part 22. The first protrusion 2121 interferes with the inner wall surface of the mounting groove 121 to further limit the displacement of the main body 21, so that the positive terminal 2 is stably installed on the insulating base 1, reducing the influence of high frequency vibration on the positive terminal 2. Furthermore, the setting of the turning plate 212 can effectively adjust the position of the side part 22, making it easier to set more positive electrode springs 222 on the side part 22, thereby achieving a better electrical connection with the battery 200.

[0046] 4. The bending portion 23 is formed by bending one end of the main body portion 21, and the elastic plate portion 24 extends from the bending portion 23 in the vertical direction. The width of the mounting groove 121 recessed from the inner wall surface of the enclosure 12 along the central axis away from the receiving cavity 13 is greater than the width of the receiving groove 122. This allows the mounting groove 121 to better accommodate the elastic plate portion 24, preventing the elastic plate portion 24 from entering the receiving cavity 13 too much and affecting the smooth installation of the battery 200, and making the elastic plate portion 24 less likely to be damaged or deformed due to the installation of the battery 200.

[0047] 5. The elastic plate portion 24 is closer to the central axis of the receiving cavity 13 than the positive electrode spring piece 222, so that the battery 200 contacts the elastic plate portion 24 first during installation. The elastic plate portion 24 has a limiting piece 241 protruding towards the receiving cavity 13. The limiting piece 241 is inclined downwards towards the receiving cavity 13 from top to bottom to form the first guiding slope 2411. The upper end of each positive electrode spring piece 222 has a second guiding slope 2222. When the battery 200 is assembled downwards, the first guiding slope 2411 and the second guiding slope 2222 sequentially guide the battery 200 into the receiving cavity 13 to elastically abut against the positive electrode contact portion 2221, so that the battery 200 can be smoothly installed from top to bottom. In the receiving cavity 13, the elastic plate 24 first guides the battery 200 to protect the positive electrode spring 222, preventing the positive electrode spring 222 from being damaged or deformed by the collision of the battery 200. When the battery 200 is assembled in place, the bottom of the limiting piece 241 blocks the top surface of the battery 200 downward to limit the upward displacement of the battery 200, thereby stably holding the battery 200, reducing the vibration amplitude of the battery 200 in the upper and lower directions, reducing the wear between the contact points of the elastic plate 24 and the side surface of the battery 200 and between the positive electrode contact 2221 and the side surface of the battery 200, thereby making the contact impedance between the positive terminal 2 and the battery 200 stable and the electrical connection good.

[0048] 6. The elastic plate portion 24 has a first through hole 242 and a second through hole 243. The first through hole 242 is located above the second through hole 243. The portion of the elastic plate portion 24 located at the upper edge of the first through hole 242 abuts against the side surface of the battery 200. The second through hole 243 is located in the lower section of the elastic plate portion 24 and extends to the bent portion 23. The first through hole 242 and the second through hole 243 are at least partially located on the same vertical section, thereby improving the rebound effect of the elastic plate portion 24. The elastic plate portion 24 has better contact with the battery 200 and is less prone to elastic fatigue. Even if metal chips are generated due to wear between the contact point of the elastic plate portion and the battery 200, they can be discharged from the first through hole 242. After the metal chips discharged from the first through hole 242 fall downward, they can be further discharged from the second through hole 243, thereby preventing metal chips from sticking to the contact position between the elastic plate portion 24 and the battery 200, and thus ensuring good electrical connection between the positive terminal 2 and the battery 200.

[0049] 7. The top of the elastic plate portion 24 has the operating portion 244, which is inclined downwards towards the receiving cavity 13. When the battery 200 is installed from top to bottom, the operating portion 244 guides the battery 200 to be smoothly received in the receiving cavity 13. When the battery 200 needs to be removed, pressing the operating portion 244 moves it towards the main body portion 21, and the elastic plate portion 24 moves towards the main body portion 21 and is received in the mounting groove 121, so that the battery 200 can be smoothly removed without damaging the positive terminal 2. The elastic plate portion 24 bends and extends a limiting arm 245 on each side of the operating portion 244. The enclosure 12 has a stop portion 123 protruding upward on each side of the mounting groove 121. Each stop portion 123 is located inside the limiting arm 245 to restrict the displacement of the elastic plate portion 24 towards the receiving cavity 13, preventing the elastic plate portion 24 from entering the receiving cavity 13 too much, so that the battery 200 can be smoothly installed in the receiving cavity 13, and the elastic plate portion 24 is not easily damaged or deformed by the collision of the battery 200.

[0050] 8. The top of the enclosure 12 protrudes from the receiving cavity 13 with the upper limit part 124, and the bottom wall 11 protrudes from the upper and lower direction with the overpressure protection part 111. The bottom surface of the upper limit part 124 blocks the top surface of the battery 200 to limit the upward displacement of the battery 200, and the top surface of the overpressure protection part 111 supports the bottom surface of the battery 200 to limit the downward displacement of the battery 200. The overpressure protection part 111 can protect the battery 200 from excessive downward displacement and damage to the negative terminal 3. The upper limit part 124 and the overpressure protection part 111 respectively limit the upward and downward displacement of the battery 200 so that the battery 200 is stably fixed in the receiving cavity 13 to reduce the vibration amplitude of the battery 200 in the upper and lower direction, thereby reducing the wear between the battery 200 and the negative electrode spring, and making the contact impedance between the positive terminal 2, the negative terminal 3 and the battery 200 stable, so that the battery 200 always maintains a stable voltage transmission.

[0051] 9. The inner wall surface of the enclosure 12 protrudes from the receiving cavity 13 with the horizontal limiting part 125. The top end of the horizontal limiting part 125 is lower than the top end of the upper limiting part 124. Two grooves 126 are distributed on opposite sides of the horizontal limiting part 125. The grooves 126 connect the receiving cavity 13 with the external space, allowing the horizontal limiting part 125 to elastically move. The multiple horizontal limiting parts 125 elastically abut against the side surface of the battery 200 to restrict the displacement of the battery 200, so that the battery... The battery 200 is stably held in the receiving cavity 13, reducing the displacement space of the battery 200 and further reducing the vibration amplitude of the battery 200 in the horizontal direction. This reduces the wear between the positive terminal 2, the negative terminal 3 and the battery 200, stabilizes the contact impedance between the positive terminal 2, the negative terminal 3 and the battery 200, and ensures that the battery 200 always maintains a stable voltage transmission. The battery 200 forms a good electrical connection with the positive terminal 2 and the negative terminal 3.

[0052] 10. The negative terminal 3 is provided with a plurality of relatively extended first negative electrode springs 311 and a plurality of second negative electrode springs 312, and the negative terminal 3 extends with two third negative electrode springs 313. The length of the third negative electrode springs 313 is greater than the length of the first negative electrode springs 311 and the length of the second negative electrode springs 312. Each first negative electrode spring 311 has a first contact portion 3111, each second negative electrode spring 312 has a second contact portion 3121, and each third negative electrode spring 313 has a third contact portion 3131. Each first contact portion 3111, each second contact portion 3121, and each third contact portion 3131 are arranged in a triangular structure and are all connected to the electrical... The bottom surface of the battery 200 abuts against the negative terminal 3, which increases the number of contact points with the battery 200. The first contact portion 3111, the second contact portion 3121, and the third contact portion 3131 form a three-position contact with the battery 200, ensuring a firm connection between the battery 200 and the negative terminal 3. This effectively prevents poor contact or momentary disconnection between the negative terminal 3 and the bottom surface of the battery 200, reduces the vibration amplitude of the battery 200, and reduces wear between the first contact portion 3111, the second contact portion 3121, the third contact portion 3131 and the bottom surface of the battery 200. This stabilizes the contact impedance between the negative terminal 3 and the battery 200, resulting in a good electrical connection.

[0053] 11. The bottom wall 11 is recessed downwards to form a first overvoltage protection groove 112 and two second overvoltage protection grooves 113. Multiple first negative electrode springs 311 and multiple second negative electrode springs 312 are located directly above the first overvoltage protection groove 112. The third negative electrode spring 313 is located directly above the second overvoltage protection groove 113. The first overvoltage protection groove 112 makes way for the first negative electrode springs 311 and the second negative electrode springs 312, and the second overvoltage protection groove 113 makes way for the third negative electrode spring 313, ensuring that the first negative electrode springs 311, the second negative electrode springs 312, and the third negative electrode spring 313 make sufficient elastic contact with the battery 200.

[0054] 12. The end of the third negative electrode spring 313 away from the third contact portion 3131 is bent downward to form the bent portion 3132. The bottom surface of the second overvoltage protection groove 113 is provided with the boss 1131 protruding upward. The bent portion 3132 is located in the second overvoltage protection groove 113. The third contact portion 3131 is located above the second overvoltage protection groove 113. When the battery 200 elastically abuts against the third contact portion 3131, the top surface of the boss 1131 supports the bottom surface of the bent portion 3132, so that the third negative electrode spring 313 has two lever arms for support. The third negative electrode spring 313 is not prone to elastic fatigue. The third contact portion 3131 can better contact the bottom surface of the battery 200. The negative terminal 3 maintains a good electrical connection with the battery 200.

[0055] 13. The third negative electrode spring 313 is provided with the elongated hole 3133, which extends along the extension direction of the third negative electrode spring 313 to the third contact portion 3131. This makes the third negative electrode spring 313 more elastic and less prone to elastic fatigue. The third contact portion 3131 makes better contact with the bottom surface of the battery 200, reducing wear between the third contact portion 3131 and the bottom surface of the battery 200. Even if metal shavings are generated by wear between the third contact portion 3131 and the bottom surface of the battery 200, they can be discharged through the elongated hole 3133, preventing metal shavings from adhering to the contact point between the third contact portion 3131 and the bottom surface of the battery 200. This makes the contact impedance between the negative terminal 3 and the battery 200 stable, thus forming a good electrical connection.

[0056] 14. The negative terminal 3 has a fixing part 32 at each end and a middle part 31 connecting the two fixing parts 32. The bottom wall 11 has two fixing grooves 114 extending through it in the vertical direction for the two fixing parts 32 to be inserted, so that the negative terminal 3 is stably installed on the insulating base 1 and is not easily displaced due to vibration. At the same time, the fixing parts 32 at both ends of the negative terminal 3 can prevent one end of the negative terminal 3 from tilting up. Multiple first negative electrode springs 311 and multiple second negative electrode springs 311 extend from opposite sides of the middle part 31. The negative electrode spring 312, and the middle portion 31 extends to two third negative electrode springs 313, which are respectively located on the outermost sides of the plurality of first negative electrode springs 311 and the plurality of second negative electrode springs 312. The free ends of each first negative electrode spring 311 and the free ends of each second negative electrode spring 312 are spaced apart to avoid the first negative electrode springs 311 and the second negative electrode springs 312 from intersecting along the relative extension direction. This reduces production costs while ensuring stable contact impedance between the negative terminal 3 and the battery 200 and maintaining a good electrical connection.

[0057] 15. The negative terminal 3 has a fixing part 32 at each end. Each fixing part 32 has protruding protrusions 321 on both sides of its plate edge. The plate surfaces of the two fixing parts 32 have opposing protrusions of stop plates 322. The inner sidewall of each fixing groove 114 has a recessed limiting groove 1141 opposite to the other fixing groove 114. Each protrusion 321 interferes with the side of the corresponding fixing groove 114. The top wall of the limiting groove 1141 blocks the top of the stop plate 322 to limit the displacement of the negative terminal 3, so that the negative terminal 3 is further stably fixed in the receiving cavity 13, reducing the impact of vibration on the negative terminal 3. The opposing protrusions of the stop plates 322 on the plate surfaces of the two fixing parts 32 avoid each other, making the insulating base 1 structure more stable and less prone to damage.

[0058] The above detailed description is only an illustration of a preferred embodiment of the present invention and is not intended to limit the patent scope of the present invention. Therefore, all equivalent technical changes made using the content of this invention's specification and illustrations are included within the patent scope of this invention.

Claims

1. A battery holder for mounting a battery, characterized by include: An insulating base has a surrounding wall and a bottom wall connected to the bottom end of the surrounding wall along its circumferential direction. The bottom wall and the surrounding wall together form a receiving cavity with an upper opening. The surrounding wall is recessed in the vertical direction with a mounting groove and two receiving grooves located on both sides of the mounting groove. The mounting groove and the two receiving grooves are all connected to the receiving cavity. A positive terminal is installed on the insulating base. The positive terminal has a main body fixed to the mounting groove, a bent portion formed by bending one end of the main body, and an elastic plate portion extending from the bent portion in the vertical direction. A clearance space is provided between the elastic plate portion and the main body. The elastic plate portion partially enters the receiving cavity. A side portion extends from opposite sides of the main body. The two side portions are located on both sides of the elastic plate portion and are correspondingly accommodated in the two receiving grooves. Each side portion is provided with a plurality of positive electrode springs extending in the vertical direction. Each positive electrode spring has a protruding positive electrode contact portion that enters the receiving cavity. The plurality of positive electrode contacts are arranged along the circumferential direction of the insulating base on the inner side of the enclosure. A negative terminal is fixed to the insulating base, and the negative terminal has multiple negative electrode springs located at the bottom of the receiving cavity; When the battery is installed in the receiving cavity from top to bottom, the elastic plate portion abuts against the side surface of the battery and moves toward the main body portion. The elastic plate portion and the multiple positive electrode contact portions of the two sides elastically contact the multiple positions of the side surface of the battery, and the multiple negative electrode springs elastically contact the bottom surface of the battery. The main body includes a fixed plate and two turning plates connecting opposite sides of the fixed plate. The two turning plates are respectively connected to the two side portions, and each turning plate extends from the fixed plate toward the receiving cavity without exceeding the inner wall surface of the enclosure.

2. The battery holder as described in claim 1, characterized in that: Each of the sides has a through groove, and at least three positive electrode springs are integrally extended upward from the lower edge of the through groove, with the end of each positive electrode spring disconnected from the upper edge of the through groove.

3. The battery holder as described in claim 1, characterized in that: A protrusion is provided on the side of the fixed plate away from the receiving cavity. A retaining part is provided on the inner side of the mounting groove towards the receiving cavity above the protrusion. The bottom surface of the retaining part blocks the top of the protrusion. Each of the turning plates has at least one first protrusion on one side edge away from the side portion. The first protrusion interferes with the inner wall surface of the mounting groove. At least one second protrusion is provided at the end of the side portion. The second protrusion interferes with the inner wall surface of the receiving groove.

4. The battery holder as described in claim 1, characterized in that: The main body portion is further away from the central axis of the receiving cavity than the side portion, and the width of the mounting groove recessed from the inner wall surface of the enclosure along the central axis away from the receiving cavity is greater than the width of the receiving groove recess.

5. The battery holder as described in claim 1, characterized in that: The elastic plate portion is closer to the central axis of the receiving cavity than the positive electrode spring. A limiting piece protrudes from the elastic plate portion toward the receiving cavity. The limiting piece is inclined downward toward the receiving cavity from top to bottom to form a first guiding slope. Each positive electrode spring has a second guiding slope at its upper end. When the battery is assembled downward, the first guiding slope and the second guiding slope sequentially guide the battery into the receiving cavity to elastically abut against the positive electrode contact portion. When the battery is assembled in place, the bottom of the limiting piece blocks the top surface of the battery downward.

6. The battery holder as described in claim 1, characterized in that: The elastic plate portion has a first through hole and a second through hole. The first through hole is located above the second through hole. The portion of the elastic plate portion located at the upper edge of the first through hole abuts against the side surface of the battery. The second through hole is located in the lower section of the elastic plate portion and extends to the curved portion. The first through hole and the second through hole are at least partially located on the same vertical cross section.

7. The battery holder as described in claim 1, characterized in that: The top of the elastic plate has an operating part, which is inclined from top to bottom toward the receiving cavity. The elastic plate has a limiting arm that bends and extends on both sides of the operating part. The enclosure has a stop part that protrudes upward on both sides of the mounting groove. Each stop part is located inside the limiting arm to limit the displacement of the elastic plate toward the receiving cavity.

8. The battery holder as described in claim 1, characterized in that: The top of the enclosure wall protrudes at least one upper limit portion toward the receiving cavity, and the bottom wall protrudes at least one overpressure protection portion in the vertical direction. The bottom surface of the upper limit portion blocks the top surface of the battery, and the top surface of the overpressure protection portion supports the bottom surface of the battery.

9. The battery holder as described in claim 8, characterized in that: The inner wall of the enclosure has at least one pair of horizontal limiting portions protruding towards the receiving cavity. The top of each horizontal limiting portion is lower than the top of the upper limiting portion. The enclosure has a recess on each side of each horizontal limiting portion, and the recesses connect the receiving cavity to the external space. The pair of horizontal limiting portions elastically abut against the opposite sides of the side surface of the battery.

10. The battery holder as described in claim 1, characterized in that: The plurality of negative electrode springs include a plurality of first negative electrode springs and a plurality of second negative electrode springs extending relative to each other, and at least one third negative electrode spring. The length of the third negative electrode spring is greater than the length of the first negative electrode spring and the length of the second negative electrode spring. Each first negative electrode spring has a first contact portion, each second negative electrode spring has a second contact portion, and each third negative electrode spring has a third contact portion. Each first contact portion, each second contact portion, and each third contact portion are arranged in a triangular structure and all abut against the bottom surface of the battery.

11. The battery holder as described in claim 10, characterized in that: The bottom wall is recessed to form a first overvoltage protection groove and at least one second overvoltage protection groove. Multiple first negative electrode springs and multiple second negative electrode springs are located directly above the first overvoltage protection groove, and the third negative electrode spring is located directly above the second overvoltage protection groove.

12. The battery holder as described in claim 11, characterized in that: The third negative electrode spring has a through-hole, which extends along the extension direction of the third negative electrode spring to the third contact portion. The end of the third negative electrode spring away from the third contact portion is bent downward to form a bent portion. A boss protrudes upward from the bottom surface of the second overvoltage protection groove. The bent portion is located in the second overvoltage protection groove, and the third contact portion is located above the second overvoltage protection groove. When the battery elastically abuts against the third contact portion, the top surface of the boss supports the bottom surface of the bent portion.

13. The battery holder as described in claim 11, characterized in that: The negative terminal has a fixing part at each end and a middle part connecting the two fixing parts. The bottom wall has two fixing grooves running vertically for the two fixing parts to be inserted. Multiple first negative electrode springs and multiple second negative electrode springs extend from opposite sides of the middle part. The first negative electrode springs have a first contact part protruding upward, and the second negative electrode springs have a second contact part protruding upward. The free ends of each first negative electrode spring and each second negative electrode spring are spaced apart.

14. The battery holder as described in claim 13, characterized in that: Each of the two sides of the fixing part is provided with a protruding spike, and the two fixing parts are provided with a stop plate protruding opposite each other. The inner sidewall of each fixing groove is provided with a limiting groove opposite to the other fixing groove. Each spike interferes with the side of the corresponding fixing groove, and the top wall of the limiting groove blocks the top of the stop plate.

15. The battery holder as described in claim 11, characterized in that: The plurality of negative electrode springs include at least three first negative electrode springs, at least three second negative electrode springs, and at least two third negative electrode springs. The two third negative electrode springs are respectively located on the outermost sides of the three first negative electrode springs and the three second negative electrode springs. The negative terminal has three first contact portions, three second contact portions, and two third contact portions to form eight-point contact with the bottom surface of the battery. Each side of the positive terminal extends with three positive electrode springs. The elastic plate portion protrudes a limiting piece toward the receiving cavity. The bottom of the limiting piece abuts against the top surface of the battery. The six positive electrode contact portions of the six positive electrode springs, together with the elastic plate portion and the limiting piece, abut against the battery to form eight-point contact.

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