High-safety power battery with fuse and PTC (Positive Temperature Coefficient) used in parallel and configured with CID (Compact Identifier)

Abstract

The utility model discloses a high-safety power battery with a fuse and a PTC (Positive Temperature Coefficient) used in parallel and configured with a CID (Compact Identifier), and particularly relates to the technical field of pipeline sealing detection, the high-safety power battery comprises a roll core and two bus bars, the roll core is arranged between the upper bus bar and the lower bus bar, and the PTC is fixedly connected between the upper conducting strip and the lower conducting strip. A current-conducting plate is fixedly connected to the lower side of the upper surface of the negative pole, a fuse is fixedly connected to the current-conducting plate and the upper surface of the negative pole, and a cut-off assembly is arranged on one side of the bent position of the fuse. According to the high-safety power battery with the fuse and the PTC used in parallel and configured with the CID, the fuse and the PTC are assembled outside the negative pole end cover in parallel to serve as a first protection measure, the CID is configured on the positive pole end cover to serve as a second protection measure, and the two protection measures enable the battery to have higher safety performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, especially a fuse and PTC parallel use and configure CID's high security power battery. BACKGROUND

[0002] Power battery refers to the power storage battery for electric vehicle, electric logistics vehicle, industrial and medical electric equipment, portable electronic equipment and other tools.

[0003] With the popularity of electric vehicles and mobile devices, lithium power battery as the core energy storage device, its safety performance becomes the focus of public and scientific research field, in recent years, lithium power battery in the use process occurs frequently, such as fire, explosion and other safety accidents, not only threatens the user life and property safety, also restricts the healthy development of lithium battery industry.

[0004] In view of this, the safety performance of lithium power battery is studied, and its safety and reliability are improved, which has important significance for promoting the sustainable development of new energy industry in China. INVENTION CONTENTS

[0005] The main purpose of the utility model is to provide a fuse and PTC parallel use and configure CID's high security power battery, which can effectively solve the problems in the above.

[0006] In order to achieve the above purpose, the technical scheme adopted by the utility model is:

[0007] A fuse and PTC parallel use and configure CID's high security power battery, including roll core and two bus bars, the roll core is installed between the upper and lower two bus bars, the end face of the two bus bars away from the roll core is fixedly connected with the positive pole and the negative pole respectively, the positive pole is fixedly connected with the upper and lower supporting plates, the upper and lower supporting plates on the upper side and the upper and lower supporting plates on the lower side are connected with CID, the CID is rotatably connected with the bus bar on the lower side, the upper and lower sides of the negative pole are respectively connected with two upper and lower conductive sheets, the two upper and lower conductive sheets are fixedly connected with PTC, the lower side of the upper surface of the negative pole is fixedly connected with a conductive plate, the conductive plate and the upper surface of the negative pole are fixedly connected with a fuse, one side of the bending part of the fuse is provided with a cutting assembly.

[0008] Preferably, the cutting assembly comprises a shell, the shell is fixedly installed at the top end of the conductive plate, and an insulating layer is fixedly and spacedly installed at the connection between the shell and the conductive plate.

[0009] Preferably, the shell is provided with a limiting cavity in the middle close to one end of the fuse bending part, two sliding cavities are symmetrically provided on both sides of the shell away from the middle close to one end of the fuse bending part, and a sliding groove is provided in the middle of the top end of the shell and communicates with the inner cavity of the limiting cavity.

[0010] Preferably, the inner cavity surfaces of the two sliding cavities are respectively slidably provided with two slide rods, and the two sliding cavities are respectively provided with two springs, and the first and last ends of the two springs are respectively abutted between the two slide rods and the bottom ends of the inner cavities of the two sliding cavities.

[0011] Preferably, a memory metal ring is fixedly installed on the front side of the inner cavity surface of the limiting cavity, a wire is fixedly connected to the outer surface of the memory metal ring, the other end of the wire is connected to the PTC, a limiting rod matched with the memory metal ring is installed in the inner cavity surface of the memory metal ring, and a push handle that slides with the sliding groove is fixedly connected to the outer surface of the upper side of the limiting rod.

[0012] Preferably, the front ends of the two slide rods and the limiting rod are fixedly connected with a mounting plate, and the mounting plate is symmetrically provided with a ceramic cutter close to one end of the fuse bending part.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1、The utility model discloses a fuse and PTC are assembled in the negative pole post end cover outside as the first protection measure, and the CID is arranged on the positive pole post end cover as the second protection measure, and two protection measures make the battery have higher safety performance.

[0015] 2、In the utility model, when the current overload is heated to the PTC, the PTC is cut off by the cutting assembly, the power-off speed of the fuse is accelerated, the fuse time is reduced, so that the circuit and related electrical equipment can be protected more timely and effectively, and the safety hazards such as equipment damage and fire caused by the long duration of current overload are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic view of the utility model;

[0017] Figure 2 It is the top view of the cutting assembly in the utility model;

[0018] Figure 3 It is the top view of the cutting assembly in the utility model.

[0019] In the diagram: 1. Positive terminal; 2. Upper and lower support plates; 3. CID; 4. Busbar; 5. Core; 7. Upper and lower conductive plates; 8. PTC; 9. Negative terminal; 10. Conductive plate; 11. Fuse; 12. Cut-off assembly; 121. Housing; 122. Limiting cavity; 1221. Memory metal ring; 1222. Wire; 1223. Limiting rod; 1224. Push handle; 123. Sliding cavity; 1231. Slide rod; 1232. Spring; 124. Slide groove; 125. Mounting plate; 1251. Ceramic cutter; 13. Explosion-proof valve. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Example 1

[0022] Specifically, such as Figure 1 As shown, a high-safety power battery using a fuse and a PTC in parallel and configured with a CID includes a core 5 and two busbars 4. The core 5 is installed between the upper and lower busbars 4. The ends of the two busbars 4 away from the core 5 are respectively fixedly connected to a positive terminal 1 and a negative terminal 9. The positive terminal 1 is fixedly connected to an upper and lower support plate 2. A CID3 is connected between the upper and lower support plates 2 and the lower support plates 2. The CID3 is rotatably connected to the lower busbar 4. The upper and lower sides of the negative terminal 9 are respectively connected to two upper and lower conductive plates 7. A PTC 8 is fixedly connected between the two upper and lower conductive plates 7. A conductive plate 10 is fixedly connected to the lower side of the upper surface of the negative terminal 9. A fuse 11 is fixedly connected to the conductive plate 10 and the upper surface of the negative terminal 9. A cut-off component 12 is provided on one side of the bent part of the fuse 11.

[0023] In this embodiment, during actual operation, the negative terminal cover PTC8 and fuse 11 are connected in parallel to the circuit, and the positive terminal cover is equipped with CID3 and explosion-proof valve 13. Since PTC8 and fuse 11 are connected in parallel, there are two conduction paths for the core 5 from the positive to the negative terminal. The first current passes through the positive terminal post 1, upper and lower support plates 2, CID3, upper and lower support plates 2, bus bar 4, core 5, bus bar 4, negative terminal post 9, upper and lower conductive plates 7, PTC8, upper and lower conductive plates 7, and negative terminal post 9 in sequence. The second current passes through the positive terminal post 1, upper and lower support plates 2, CID3, upper and lower support plates 2, bus bar 4, core 5, bus bar 4, negative terminal post 9, conductive plate 10, fuse 11, and negative terminal post 9 in sequence. The battery is well insulated throughout.

[0024] The working principle is that when the current through the PTC 8 is small, the resistance of the PTC 8 is small, and the PTC 8 can work normally. Once the battery fails, the current increases to the trigger current of the PTC 8, the PTC 8 rapidly heats up, causing its resistance to increase dramatically. In this case, since the resistance of the PTC 8 becomes very high, and the resistance of the fuse 11 connected in parallel with the PTC 8 is very small, the current will mainly pass through the fuse 11. At this time, the fuse 11 begins to play a role. If the current in the circuit exceeds the bearing range of the fuse 11, the fuse will be blown, thereby realizing protection of the circuit. If the fuse is not blown and the abnormal condition of the battery is solved, when the branch of the circuit where the PTC 8 is located passes through a small current again, the resistance of the PTC 8 will return to the initial state, and the battery can continue to be used normally;

[0025] The CID 3 acts as a conductive element of the positive electrode, ensuring the integrity of the battery circuit. When the battery has abnormal conditions such as overcharging, over-discharging, or short circuit, a large amount of gas is generated, which in turn causes the internal pressure of the battery to continuously rise. Once the internal pressure rises to a certain critical point, the CID 3 will flip and disconnect, interrupting the flow of current, thereby realizing the protection function. The burst pressure that the explosion-proof valve 13 can withstand is greater than that of the CID 3, so the CID 3 acts in conjunction with the CID 3 after the explosion-proof valve 13 acts, forming a double protection system for the battery.

[0026] Embodiment Two

[0027] On the basis of embodiment one, when the current overload rapidly heats up the PTC 8, the PTC 8 rapidly cuts off the fuse 11 through the cutting assembly 12, speeds up the power-off speed of the fuse 11, reduces the time of the fuse 11 melting, and thereby can more timely and effectively protect the circuit and related electrical equipment, avoiding the safety hazards such as equipment damage and fire caused by the long duration of current overload.

[0028] Specifically, as shown in Figure 2 and Figure 3 , the cutting assembly 12 includes a housing 121, the housing 121 is fixedly installed at the top end of the conductive plate 10, and an insulating layer is fixedly and spacedly installed at the connection between the housing 121 and the conductive plate 10;

[0029] A limiting cavity 122 is formed in the middle of one end of the housing 121 close to the curved part of the fuse 11, two sliding cavities 123 are symmetrically formed on both sides of the other end of the housing 121 close to the curved part of the fuse 11, and a sliding groove 124 is formed in the middle of the top end of the housing 121 and communicates with the inner cavity of the limiting cavity 122;

[0030] The inner cavity surface of the two sliding cavities 123 is slidably installed with two sliding rods 1231, and the inner cavities of the two sliding cavities 123 are respectively provided with two springs 1232, and the first end and the tail end of the two springs 1232 are respectively abutted between the two sliding rods 1231 and the bottom end of the inner cavities of the two sliding cavities 123.

[0031] The inner cavity surface of the limiting cavity 122 is fixedly installed with a memory metal ring 1221 at the front side, the outer surface of the memory metal ring 1221 is fixedly connected with a lead wire 1222, the other end of the lead wire 1222 is fixedly connected with the PTC 8, the inner cavity surface of the memory metal ring 1221 is installed with a limiting rod 1223 matched therewith, and the outer surface of the limiting rod 1223 is fixedly connected with a push handle 1224 which is slidably connected with the sliding groove 124.

[0032] The front ends of the two sliding rods 1231 and the limiting rod 1223 are fixedly connected with a mounting plate 125, and the mounting plate 125 is symmetrically installed with a ceramic cutter 1251 near one end of the bending part of the fuse 11.

[0033] The outer surface of the limiting rod 1223 is slidably connected with the inner cavity surface of the memory metal ring 1221, and the inner cavity surface of the memory metal ring 1221 is slightly smaller than the outer surface of the limiting rod 1223, so that the two form a damping effect, and the limiting rod 1223 cannot slide in the limiting cavity 122 due to the limitation of the memory metal ring 1221, when the current of the PTC 8 is overloaded, the memory metal ring 1221 is heated through the lead wire 1222, so that the memory metal ring 1221 expands to limit the limiting rod 1223, and then the two sliding rods 1231 are pushed forward by the tension of the two springs 1232, and the ceramic cutter 1251 is driven forward to cut off the fuse 11.

[0034] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-safety power battery using a fuse and a PTC connected in parallel and configured with a CID, characterized in that, Includes a core (5) and two busbars (4): the core (5) is installed between the upper and lower busbars (4), and the ends of the two busbars (4) away from the core (5) are respectively fixedly connected to a positive terminal (1) and a negative terminal (9). An upper and lower support plate (2) is fixedly connected to the positive terminal (1), and a CID (3) is connected between the upper and lower support plates (2). The busbar (4) is rotatably connected. Two upper and lower conductive plates (7) are connected to the upper and lower sides of the negative electrode post (9). A PTC (8) is fixedly connected between the two upper and lower conductive plates (7). A conductive plate (10) is fixedly connected to the lower side of the upper surface of the negative electrode post (9). A fuse (11) is fixedly connected to the upper surface of the conductive plate (10) and the negative electrode post (9). A cut-off component (12) is provided on one side of the bent part of the fuse (11).

2. The high-safety power battery according to claim 1, which uses a fuse and a PTC in parallel and is configured with a CID, is characterized in that: The cutting assembly (12) includes a housing (121), which is fixedly installed on the top of the conductive plate (10), and an insulating layer is fixedly installed at a distance between the housing (121) and the conductive plate (10).

3. The high-safety power battery according to claim 2, which uses a fuse and a PTC in parallel and is configured with a CID, is characterized in that: A limiting cavity (122) is provided in the middle of the end of the housing (121) near the bend of the fuse (11). Two sliding cavities (123) are symmetrically provided on both sides of the end of the housing (121) away from the middle of the bend of the fuse (11). A sliding groove (124) is provided through the middle of the top of the housing (121) and communicates with the inner cavity of the limiting cavity (122).

4. A high-safety power battery according to claim 3, wherein the fuse and PTC are used in parallel and configured with CID, characterized in that: Two slide rods (1231) are slidably mounted on the inner surfaces of the two sliding cavities (123), and two springs (1232) are respectively provided in the inner cavities of the two sliding cavities (123). The two ends of the two springs (1232) abut against the two slide rods (1231) and the bottom ends of the inner cavities of the two sliding cavities (123).

5. A high-safety power battery according to claim 4, wherein a fuse and a PTC are used in parallel and configured with a CID, characterized in that: A memory metal ring (1221) is fixedly installed on the front side of the inner surface of the limiting cavity (122). A wire (1222) is fixedly connected to the outer surface of the memory metal ring (1221). The other end of the wire (1222) is fixedly connected to the PTC (8). A limiting rod (1223) adapted to the inner surface of the memory metal ring (1221) is installed. A push handle (1224) that slides with the slide groove (124) is fixedly connected to the upper side of the outer surface of the limiting rod (1223).

6. A high-safety power battery according to claim 5, wherein the fuse and PTC are used in parallel and configured with CID, characterized in that: The front ends of the two slide rods (1231) and the limiting rod (1223) are fixedly connected to a mounting plate (125), and ceramic cutters (1251) are symmetrically installed on one end of the mounting plate (125) near the bend of the fuse (11).

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