High-safety power battery provided with replaceable fuse

Abstract

The utility model discloses a high-safety power battery equipped with replaceable fuses, which particularly relates to the technical field of fuses and comprises an upper cover plate, a first plastic plate is arranged at the lower end of the upper cover plate, a lower cover plate is arranged at the lower end of the first plastic plate, and a second plastic plate is arranged at the lower end of the lower cover plate. The middle side of the left part of the upper cover plate is fixedly connected with an upper pole, the middle side of the right part of the upper end of the upper cover plate is provided with a groove, a safety device is arranged in the groove, the middle sides of the right parts of the plastic plate II, the lower cover plate and the plastic plate I are jointly provided with a lower pole, and the output end of the lower pole is fixedly connected with a bus bar. According to the high-safety power battery provided with the replaceable fuse, the fuse can be quickly replaced through the designed safety device, the replacement method is simple and quick, and complicated disassembly and assembly processes are not needed, so that the maintenance efficiency is favorably improved, the downtime caused by a battery fault is shortened, and the maintenance cost is reduced. And the practicability of the device is effectively improved.

Description

A high-safety power battery equipped with replaceable fuses Technical Field

[0001] This utility model relates to the field of fuse technology, and in particular to a high-safety power battery equipped with a replaceable fuse. Background Technology

[0002] A power battery is a rechargeable battery that can provide high energy density and high power output. It usually uses lithium-ion technology and is basically composed of: upper terminal, fuse, lower terminal, and busbar, etc.

[0003] The function of a fuse is to melt and cut off the current when the current abnormally rises to a certain level or temperature, thereby protecting the circuit and ensuring its safe operation.

[0004] Due to factors such as ambient temperature, current fluctuations, aging, and manufacturing defects, fuses can blow abnormally, causing lithium-ion batteries to become unusable. When traditional power batteries fail, the entire battery pack often needs to be replaced or repaired, which is not only costly but also time-consuming. Therefore, a high-safety power battery with replaceable fuses is needed. Summary of the Invention

[0005] The main objective of this invention is to provide a high-safety power battery equipped with a replaceable fuse, which can effectively solve the problems mentioned above.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A high-safety power battery with a replaceable fuse includes an upper cover plate, a plastic plate 1 at the lower end of the upper cover plate, a lower cover plate at the lower end of the plastic plate, and a plastic plate 2 at the lower end of the lower cover plate. An upper electrode post is fixedly connected to the middle left side of the upper cover plate. A groove is formed on the middle right side of the upper upper part of the upper cover plate, and a safety device is disposed in the groove. A lower electrode post is installed together on the middle right side of the second plastic plate, the lower cover plate, and the first plastic plate. A busbar is fixedly connected to the output end of the lower electrode post, and a coiled core is welded to the output end of the busbar.

[0008] Preferably, the upper cover plate, plastic sheet one, lower cover plate, and plastic sheet two are connected by rivets.

[0009] Preferably, the safety device includes two conductive plates and a ceramic shell. The two conductive plates are fixedly connected to the left and right walls of the groove, respectively. The ceramic shell is located between the two conductive plates at their closest ends. A sleeve is fixedly connected to the inner cavity of the ceramic shell. Patches are slidably connected to the left and right sides of the inner surface of the sleeve. A copper plate is fixedly connected to the middle of the two patches at their closest ends. Four insulating rods are fixedly connected to the outer ring of the two patches at their closest ends in a common annular array. Conductive heads are fixedly connected to the two patches at their farthest ends.

[0010] Preferably, the two conductive heads are respectively attached to the conductive sheet on the same side.

[0011] Preferably, the space between the ceramic shell and the sleeve is filled with quartz sand.

[0012] Preferably, the outer surface of the sleeve has several circular holes.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This device features a designed safety mechanism that allows for quick fuse replacement. The replacement method is simple and fast, requiring no complicated disassembly and assembly process. This helps improve maintenance efficiency, reduces downtime caused by battery failure, and effectively enhances the device's practicality. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 is a schematic diagram of the safety device structure of this utility model;

[0017] Figure 3 is a cross-sectional schematic diagram of the safety device of this utility model;

[0018] Figure 4 is a left view of the patch, copper sheet and insulating rod of this utility model.

[0019] In the diagram: 1. Top cover plate; 2. Upper electrode post; 3. Plastic plate one; 4. Safety device; 5. Lower electrode post; 6. Lower cover plate; 7. Plastic plate two; 8. Busbar; 41. Conductive sheet; 42. Ceramic shell; 43. Sleeve; 44. Conductive head; 45. Patch; 46. Copper sheet; 47. Insulating rod. 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] As shown in Figure 1, a high-safety power battery with replaceable fuses includes an upper cover plate 1, a plastic plate 3 at the lower end of the upper cover plate 1, a lower cover plate 6 at the lower end of the plastic plate 3, a plastic plate 7 at the lower end of the lower cover plate 6, an upper pole post 2 fixedly connected to the middle left side of the upper cover plate 1, a groove opened on the middle right side of the upper end of the upper cover plate 1, a safety device 4 is installed in the groove, a lower pole post 5 is installed together on the middle right side of the plastic plate 7, the lower cover plate 6 and the plastic plate 3, a busbar 8 is fixedly connected to the output end of the lower pole post 5, and a coiled core is welded to the output end of the busbar 8;

[0023] Furthermore, the upper cover plate 1, plastic sheet 3, lower cover plate 6, and plastic sheet 7 are connected by rivets.

[0024] In the above, the core, upper cover plate 1, upper electrode post 2, plastic plate 1 3, lower electrode post 5, lower cover plate 6, and plastic plate 2 7 together constitute the power battery.

[0025] The current transmission direction of this device is:

[0026] First, the current enters from the upper terminal 2, then the upper terminal 2 transmits the current to the upper cover plate 1, then the upper cover plate 1 transmits the current to the fuse device 4, the fuse device 4 receives the current and transmits it to the lower terminal 5, and finally the lower terminal 5 transmits the current to the bus bar 8.

[0027] In the above, a sealing ring is provided on the contact surface between the right side of the safety device 4 and the groove opened on the upper cover plate 1. The sealing ring prevents the upper cover plate 1 from transmitting current to the safety device 4 when the positive electrode of the upper electrode 2 is transmitted to the upper cover plate 1. Under the action of the sealing ring, the safety device 4 will not transmit current to the upper cover plate 1, and the current will be directly transmitted to the lower electrode 5.

[0028] Similarly, sealing rings 2 are installed on both the left and right ends of the lower electrode post 5 to prevent the lower electrode post 5 from transmitting current to the lower cover plate 6 and to prevent short circuits.

[0029] In the above, the contact surfaces between the rivet and the upper cover plate 1 and the lower cover plate 6 are also provided with sealing rings three to insulate the rivet.

[0030] In the above, plastic sheet 3 and plastic sheet 7 can insulate the upper cover 1 and the lower cover 6, and sealing rings 4 are provided on their contact surfaces to seal the upper cover 1 and the lower cover 6.

[0031] In the above description, when current flows through the fuse 4, the metal wire inside the fuse 4 will heat up due to its inherent resistance. If the rate of heat generation exceeds the rate of heat dissipation, the temperature will continue to rise until it reaches its melting point, at which point the metal wire will melt and break the circuit.

[0032] At this point, in order to avoid abnormal scrapping of the lithium power battery, the safety device 4 needs to be replaced. First, take out the safety device 4, then take out the melted metal wire inside the safety device 4, then put the new metal wire back into the safety device 4, and then forcefully push the safety device 4 into the groove opened on the upper cover plate 1 to complete the replacement.

[0033] Example 2

[0034] Furthermore, in order to replace the safety device 4, referring to Figures 2, 3 and 4, the safety device 4 includes two conductive plates 41 and a ceramic shell 42. The two conductive plates 41 are fixedly connected to the left and right walls of the groove, respectively. The ceramic shell 42 is located between the two conductive plates 41 at their close ends. A sleeve 43 is fixedly connected to the inner cavity of the ceramic shell 42. Patches 45 are slidably connected to the left and right sides of the inner surface of the sleeve 43. A copper plate 46 is fixedly connected to the middle of the two patches 45 at their close ends. Four insulating rods 47 are fixedly connected to the outer ring of the two patches 45 at their close ends in a common annular array. A conductive head 44 is fixedly connected to the two patches 45 at their far ends.

[0035] Furthermore, the two conductive heads 44 are respectively attached to the conductive sheet 41 on the same side;

[0036] Furthermore, the space between the ceramic shell 42 and the sleeve 43 is filled with quartz sand;

[0037] Furthermore, the outer surface of the sleeve 43 is provided with several circular holes.

[0038] In the above process, the current is transmitted through the upper cover plate 1 to the left conductive plate 41, the left conductive plate 41 then transmits the current to the left conductive head 44, the left conductive head 44 then transmits the current through the patch 45 and the copper plate 46 to the right conductive plate 41, and then the right conductive plate 41 transmits the current to the lower electrode 5.

[0039] In the above, the sealing ring is located between the conductive sheet 41 on the right and the contact surface of the upper cover plate 1, so that the conductive sheet 41 can only transmit current to the lower electrode 5.

[0040] In the above-mentioned process, when the copper sheet 46 melts due to high temperature, it needs to be replaced. At this time, the ceramic shell 42 is removed from the groove, causing the conductive head 44 to disengage from the conductive sheet 41. After removal, the conductive head 44, the patch 45, the copper sheet 46, and the insulating rod 47 are pushed out of the sleeve 43 together. Then, the conductive head 44, the patch 45, the copper sheet 46, and the insulating rod 47 are replaced as a single unit. The replaced conductive head 44, the patch 45, the copper sheet 46, and the insulating rod 47 are then pushed back into the sleeve 43. Return the sleeve 43 to the groove, and then put the ceramic shell 42 back into the groove. At this time, the conductive head 44 will come into contact with the conductive sheet 41. The conductive sheet 41 is hollow, which makes it elastic. When the conductive head 44 is forcefully pushed into the groove, the conductive sheet 41 will deform, causing the conductive head 44 to slide down along the surface of the conductive sheet 41 and stick to the conductive sheet 41. When the conductive head 44 moves to the middle of the conductive sheet 41, the concave surface of the conductive sheet 41 will completely stick to the conductive sheet 41, and the replacement of the safety device 4 can be completed.

[0041] In the above, the quartz sand filling between the ceramic shell 42 and the sleeve 43 can play a good role in extinguishing the arc, and the ceramic shell 42 can play a role in explosion prevention.

[0042] In the above, the circular hole on the outer surface of the sleeve 43 is smaller than the minimum diameter of the quartz sand to prevent the quartz sand from entering the sleeve 43 through the circular hole.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-safety power battery equipped with a replaceable fuse, comprising a top cover (1), characterized in that: The lower end of the upper cover plate (1) is provided with a plastic plate one (3), the lower end of the plastic plate one (3) is provided with a lower cover plate (6), the lower end of the lower cover plate (6) is provided with a plastic plate two (7), the upper pole post (2) is fixedly connected to the middle left side of the upper cover plate (1), the middle right side of the upper end of the upper cover plate (1) is provided with a groove, a safety device (4) is provided in the groove, the lower pole post (5) is installed together on the middle right side of the plastic plate two (7), the lower cover plate (6) and the plastic plate one (3), the lower pole post (8) is fixedly connected to the output end of the lower pole post (5), and a winding core is welded to the output end of the winding core (8).

2. The high safety power battery with replaceable fuse according to claim 1, characterized in that: The upper cover plate (1), plastic plate one (3), lower cover plate (6) and plastic plate two (7) are connected by rivets.

3. A high-safety power battery with a replaceable fuse according to claim 1, characterized in that: The safety device (4) includes two conductive plates (41) and a ceramic shell (42). The two conductive plates (41) are fixedly connected to the left and right walls of the groove, respectively. The ceramic shell (42) is located between the two conductive plates (41) at their close ends. A sleeve (43) is fixedly connected to the inner cavity of the ceramic shell (42). Patches (45) are slidably connected to the left and right sides of the inner surface of the sleeve (43). A copper plate (46) is fixedly connected to the middle of the two patches (45) at their close ends. Four insulating rods (47) are fixedly connected to the outer ring of the two patches (45) at their close ends in a common annular array. A conductive head (44) is fixedly connected to the two patches (45) at their far ends.

4. A high-safety power battery with a replaceable fuse according to claim 3, characterized in that: The two conductive heads (44) are respectively attached to the conductive sheet (41) on the same side.

5. A high-safety power battery with a replaceable fuse according to claim 3, characterized in that: Quartz sand is filled between the ceramic shell (42) and the sleeve (43).

6. A high-safety power battery with a replaceable fuse according to claim 3, characterized in that: The outer surface of the sleeve (43) has several circular holes.

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