TW201725599A - Protective assembly and chargeable-dischargeable battery pack comprising an insulating outer shell, a plurality of terminal electrodes, a first fusible conductor and at least one heating body - Google Patents

Abstract

This invention provides a protective assembly and a chargeable-dischargeable battery pack. The protective assembly comprises an insulating outer shell, a plurality of terminal electrodes, a first fusible conductor and at least one heating body. The terminal electrodes comprise a first terminal electrode and a second terminal electrode. The terminal electrodes penetrate through the insulating outer shell and are supported by the insulating outer shell. A first end of each of the terminal electrodes is disposed outside the insulating outer shell. A second end of each of the terminal electrodes is disposed in the insulating outer shell. A gap is provided between second end of the second terminal electrode and a base of the insulating outer shell. The first fusible conductor is disposed in the insulating outer shell. Two ends of the first fusible conductor are electrically connected to the first terminal electrode and the second terminal electrode, respectively, to form a current path between the first terminal electrode and the second terminal electrode. The at least one heating body is configured below the second end of the second terminal electrode or over an overlapping area of both the first fusible conductor and the second terminal electrode. A first end of the at least one heating body is electrically connected with the second end of the second terminal electrode.

Description

Protective component and rechargeable battery pack

The invention relates to a rechargeable battery pack and a protection component thereof, and particularly relates to a rechargeable battery pack and a protection component thereof capable of withstanding current, over voltage or over temperature protection and capable of withstanding high charge and discharge current .

The 3C product or electronic technology industry is becoming more and more important, especially in the mobile and communications industry. The mobile device pays attention to how to save energy because the power of the mobile device depends on the battery system. Today's battery technology is limited in space on mobile devices, so the size of the battery is also limited. In the case of the same size, it is necessary to increase the battery capacity, which is the development direction of the battery industry today. The safety of the battery is a topic that everyone attaches great importance to, especially the screen of the mobile device is constantly increasing, the resolution is constantly increasing, the complexity of the camera function and the power demand of the flash, etc., the standby time and the use time of the mobile device become The challenge that all manufacturers must face. Therefore, the improvement of battery capacity has become a major issue that everyone requires. However, due to the increase in battery capacity, the safety of the battery has become an even more unavoidable issue. In practical applications of batteries, the most interesting thing is that the battery is overcharged and short-circuited with the battery (or high-current shock). Generally speaking, it is an event of overcurrent and overvoltage. How to design the minimum and minimum components in a limited space and achieve overcurrent and overvoltage protection has become one of the goals pursued by component manufacturers.

Most of the electrodes of the prior art protection components are disposed on the substrate, and the operating currents applied to the motors in the future are quite high, even higher than 50 A. The electrodes and the substrates disposed on the substrate cannot withstand the circulation of such large currents, even the electrodes and The substrate will melt and rupture.

Generally, the over-current protection components of the chip type are mostly printed on an insulating substrate using a metal material such as silver or copper as an electrode or a terminal electrode, and when the applied product is designed to use a small current such as a current of 15 A or less, There is no problem. However, when the applied product has a working current or rated current ranging from 30A to 100A, the electrode or terminal electrode made by printing cannot withstand such high operating current or rated current because of the thickness of the printed metal. There is a limit to the density, so that the internal resistance of the electrode itself is difficult to drop to a very low value, and it is more likely that the electrode will melt or break due to a large operating current or rated current.

In addition, if the fusible conductor can withstand the working current or rated current between 30A and 100A, the cross-sectional area (thickness and width) must be increased. The fusible conductor is divided into two parts after being blown, and must also have Sufficient space to ensure that the insulation resistance of the fusible conductor is within safe limits after disconnection.

In addition, if the fusible conductor can withstand the working current or rated current between 30A and 100A, the cross-sectional area (thickness and width) must be increased. In addition, heating on one side of the fusible conductor to fuse the fusible The conductor is also ok, but it blows at a slower rate.

In order to withstand high rated current, the plurality of terminal electrodes can use high-density and high-conductivity metal foils or metal sheets or metal strips as the terminal electrodes. Materials, however, most of the aforementioned fusible conductors use metal materials, so how to make the aforementioned terminal electrodes have good bonding or electrical connection with the aforementioned fusible conductors or low contact resistance is a very important technology. The conventional method is to solder the aforementioned terminal electrode and the aforementioned fusible conductor by solder. Although it is feasible, the solder is usually paste-like and melts when heated, and how to ensure the aforementioned terminal electrode and the aforementioned fusible conductor. Having enough solder to solder is a very important technique. For example, when one of the above-mentioned terminal electrode or the above-mentioned fusible conductor is pressed, the solder may overflow between the above-mentioned terminal electrode and the above-mentioned fusible conductor due to an external force, resulting in insufficient solder and formation of soldering failure. Further, if the terminal electrode or the one of the above-mentioned fusible conductors is not pressed, there is a possibility that the distance between the terminal electrode or the above-mentioned fusible conductor is too large, and the solder is not completely contacted, resulting in void welding. The above problems are all possible causes of poor protection components.

In view of this, the present invention provides a protective element and a chargeable and dischargeable battery pack, thereby solving the problems described in the prior art.

The protective element of the present invention includes an insulative outer casing, a plurality of end electrodes, a first fusible conductor, and at least one heat generating body. The terminal electrodes include a first terminal electrode and a second terminal electrode. The terminal electrodes penetrate the insulating outer casing and are supported by the insulating outer casing. The first end of each of the terminal electrodes is disposed outside the insulating housing, and the second end of each of the terminal electrodes is disposed in the insulating housing. A second gap is formed between the second end of the second end electrode and the base of the insulative outer casing. The first fusible conductor is disposed within the insulative housing. First fusible The two ends of the conductor are electrically connected to the first end electrode and the second end electrode, respectively, to form a current path between the first end electrode and the second end electrode. The at least one heating element is disposed below the second end of the second end electrode or above the overlapping area of the first fusible conductor and the second end electrode. The first end of the at least one heating element is electrically connected to the second end of the second end electrode.

In an embodiment of the invention, the second end of the first end electrode is supported by a base or projection of the insulative outer casing. Alternatively, the protective element described above further includes a fluxing material, wherein the fluxing material is disposed between the insulative outer casing and the first fusible conductor.

In an embodiment of the invention, the protective element further includes a plurality of protrusions and solder. The protrusions are respectively disposed between the first fusible conductor and at least one of the plurality of terminal electrodes. The solder is disposed between the first fusible conductor and at least one of the plurality of terminal electrodes.

In an embodiment of the invention, the second end of the first end electrode and the base of the insulating outer casing have a first gap, and the first gap is larger or smaller than the second gap. The central region of the first fusible conductor has a change in slope.

In an embodiment of the invention, the plurality of terminal electrodes further includes a third terminal electrode. One end of the third terminal electrode is electrically connected to the first fusible conductor such that a plurality of current paths are formed between the terminal electrodes.

In an embodiment of the invention, the protective element further includes a second fusible conductor. The second fusible conductor is disposed within the insulative housing, and one end of the second fusible conductor is electrically coupled to the second end electrode. The terminal electrodes also include a third terminal electrode. One end of the third end electrode is electrically connected to the other end of the second fusible conductor such that a plurality of current paths are formed between the end electrodes.

In an embodiment of the invention, the plurality of terminal electrodes further includes a fourth terminal electrode. The fourth end electrode is electrically connected to the second end of the at least one heating element. The heat generated by the at least one heat generating body fuses at least one of the first fusible conductor and the second fusible conductor after the at least one heat generating body is energized and heated.

In an embodiment of the invention, the second terminal electrode is coupled to the second surface of the first fusible conductor. The protective element described above also includes an extension electrode. One end of the extension electrode is coupled to the second end of the second end electrode, and the other end of the extension electrode is coupled to the first surface of the first fusible conductor.

In an embodiment of the invention, the plurality of terminal electrodes further includes a fourth terminal electrode. The above protective element further includes an insulating substrate. The at least one heat generating body is disposed on the insulating substrate or disposed in the insulating substrate, wherein the second end of the at least one heat generating body is electrically connected to the fourth end electrode.

In an embodiment of the invention, the plurality of terminal electrodes further includes a fourth terminal electrode. The above protective element further includes a first heating element electrode and a second heating element electrode. The first heating element electrode is disposed between the second end electrode and the first end of the at least one heating element, wherein the first end of the at least one heating element is electrically connected to the second end electrode via the first heating element electrode. The second heating element electrode is disposed between the second end and the fourth end electrode of the at least one heating element, wherein the second end of the at least one heating element electrically connects the fourth end electrode via the second heating element electrode. The second end electrode, the first heating element electrode, the at least one heating element, the second heating element electrode, and the fourth end electrode form a sandwich structure.

In an embodiment of the invention, the protection element further includes a fifth terminal electrode and at least one channel. At least one channel is disposed at the first fusible conductor and the fifth end There is a third gap between the electrodes and between the at least one channel and the fifth terminal electrode. When the at least one heating element generates heat, the molten first fusible conductor flows into the at least one channel and the third gap, so that the second end electrode and the fifth end electrode are short-circuited to be at the second end electrode and the fifth end electrode Another current path is formed between them.

In an embodiment of the invention, the second terminal electrode is coupled to the second surface of the first fusible conductor. The plurality of terminal electrodes further includes a fourth terminal electrode. The at least one heat generating body includes a first heat generating body and a second heat generating body. The first heating element is coupled between the first surface and the fourth end electrode of the first fusible conductor. The second heating element is coupled between the second end electrode and the fourth end electrode. When the at least one heating element generates heat, the first heating element heats the first surface of the first fusible conductor, and the second heating element heats the second surface of the first fusible conductor via the second end electrode.

In an embodiment of the invention, the protection element further includes a first insulating substrate and a second insulating substrate. The first heating element is disposed on the first insulating substrate or in the first insulating substrate. The second heating element is disposed on the second insulating substrate or in the second insulating substrate.

The rechargeable battery pack of the present invention includes at least one battery element group and the above-described protection element. The protection element is coupled in series with the at least one battery element group to form at least one charge and discharge current path. The protection element turns off at least one of the at least one charge and discharge current path when an overcurrent condition occurs when a charge and discharge current flowing through the protection element exceeds a rated current value.

In an embodiment of the invention, the rechargeable battery pack further includes a detection control circuit and a charge and discharge control circuit. The detection control circuit is configured to detect at least one battery The voltage or temperature of the component group. The charge and discharge control circuit is configured to determine whether to transmit the charging current from the external device to the at least one battery component group or to transmit the discharge from the at least one battery component group according to the state of the voltage detected by the detection control circuit and the type of the external device. Current to the external device.

The rechargeable battery pack of the present invention includes at least one battery component group, the above-described protection component, a switching circuit, and a detection control circuit. The protection element is coupled in series with the at least one battery element group to form at least one charge and discharge current path. The switch circuit is coupled to the second end of the at least one heating element. The detection control circuit is configured to detect a voltage or a temperature of at least one battery component group, and determine a state of the switching circuit according to the detected voltage or temperature. If the voltage or temperature of at least one of the battery element groups is normal, the switching circuit is maintained in an open state. If the voltage or temperature of the at least one battery element group is abnormal, the switching circuit is switched to the conducting state, causing the protection element to disconnect at least one of the at least one charging and discharging current path between the at least one battery element group. The protection element turns off at least one of the at least one charge and discharge current path when an overcurrent condition occurs when the charge and discharge current flowing through the protection element exceeds the rated current value.

The rechargeable battery pack of the present invention includes a plurality of battery element groups, a plurality of the above-described protection elements, a plurality of switching circuits, and a detection control circuit. Each of the battery element groups includes at least one chargeable battery element. The protective elements are connected in series with the battery element groups to form a charge and discharge current path. Each of the switching circuits is coupled to a fourth terminal electrode of one of the protective elements. The detection control circuit is configured to detect the voltage or temperature of the battery component groups, and determine the state of each of the switch circuits according to the detected voltage or temperature. If these battery cells If the voltage or temperature of the device group is normal, the switching circuits are kept in an open state. If the voltage or temperature of any of the battery element groups is abnormal, the switching circuit corresponding to the abnormal battery element group is switched to the on state, causing the protection element corresponding to the abnormal battery element group to be disconnected from the abnormal battery. A charge and discharge current path between the component groups, and switching the charge and discharge current path to the remaining normal battery component groups in the battery component group. When an overcurrent condition occurs when the charge/discharge current flowing through any of the protection elements exceeds the rated current value, the protection element in which the overcurrent condition occurs turns off the charge and discharge current path.

The above described features and advantages of the invention will be apparent from the following description.

1‧‧‧Charging device or electronic device

10‧‧‧Insert substrate

10a‧‧‧ upper surface

10b‧‧‧ lower surface

11‧‧‧First-end electrode

11c, 21c‧‧‧ protruding body

12‧‧‧Terminal electrode

16‧‧‧Insulation

19‧‧‧Insulated outer casing

19a‧‧‧Insulated outer casing base

19b‧‧‧Insulated outer casing cover

19c‧‧‧protrusion

19n‧‧‧Base

2‧‧‧Charge and discharge control circuit

21‧‧‧second end electrode

21x‧‧‧Extension electrode

31‧‧‧ fourth end electrode

32‧‧‧ fifth end electrode

4, 4a, 4b‧‧‧ battery component group

4-1, 4-2, 4-3, 4-4‧‧‧ battery components

5, 5a, 5b‧‧‧ detection control circuit

588, 588a, 588b, 588c, 588d‧‧‧ rechargeable battery pack

6, 6a, 6b‧‧‧ switch circuit

7‧‧‧heating body

71‧‧‧First heating element

72‧‧‧second heating element

7a, 7b‧‧‧heating electrode

8‧‧‧First fusible conductor

8-1‧‧‧ first surface

8-2‧‧‧ second surface

81‧‧‧Secondary Fusible Conductor

8a‧‧‧low melting conductor layer

8b‧‧‧high melting conductor layer

885, 885a, 885b, 886, 886a, 887, 888, 888a, 888b, 888c, 889, 889a, 889b, 889c, 889d‧‧‧ ‧ protective components

9‧‧‧ solder

91‧‧‧Fused materials

A, B‧‧‧ area

F1‧‧‧ current limiting circuit

G‧‧‧Location

GP1‧‧‧First gap

GP2‧‧‧Second gap

GP3‧‧‧ gap

I _c1 , I _d1 , I _d2 , I7‧‧‧ current

S‧‧ switch

T‧‧‧ channel

1A is an equivalent circuit diagram of a protection element according to an embodiment of the present invention.

FIG. 1B is a schematic cross-sectional view of a protective element according to an embodiment of the present invention.

1C is a top plan view of the protective element of FIG. 1B.

FIG. 1D is a partially enlarged schematic view of a region A of the protective element of FIG. 1B.

FIG. 1E is a cross-sectional view showing the first fusible conductor of the protection element of FIG. 1B after being blown.

1F is a schematic cross-sectional view of a protective element in accordance with an embodiment of the present invention.

2A is a top plan view of a protection element according to an embodiment of the present invention.

2B is a top plan view of a protection element according to an embodiment of the invention.

3A is a schematic cross-sectional view of a protective element in accordance with an embodiment of the present invention.

FIG. 3B is a partially enlarged schematic view of a region B of the protective element of FIG. 3A.

3C is a schematic cross-sectional view of a protective element in accordance with an embodiment of the present invention.

3D is a schematic cross-sectional view of a protective element in accordance with an embodiment of the present invention.

3E is a schematic cross-sectional view of a protective element in accordance with an embodiment of the present invention.

3F is a schematic cross-sectional view of a protective element in accordance with an embodiment of the present invention.

3G is a cross-sectional view of the first fusible conductor of the protection element of FIG. 3A after being blown.

4A is a schematic cross-sectional view of a protective element in accordance with an embodiment of the present invention.

4B is a top plan view of the protective element of FIG. 4A.

4C is a cross-sectional view showing the first fusible conductor of the protection element of FIG. 4A after being blown.

Figure 5 is a cross-sectional view of a protective element in accordance with an embodiment of the present invention.

FIG. 6 is a circuit diagram of a chargeable and dischargeable battery pack according to an embodiment of the present invention.

FIG. 7 is a circuit diagram of a chargeable and dischargeable battery pack according to an embodiment of the present invention.

FIG. 8 is a circuit diagram of a rechargeable battery pack according to an embodiment of the present invention.

FIG. 9 is a circuit diagram of a chargeable and dischargeable battery pack according to an embodiment of the present invention.

FIG. 10A is an equivalent circuit diagram of a protection element according to an embodiment of the present invention.

FIG. 10B is a schematic cross-sectional view of a protection element according to an embodiment of the present invention.

FIG. 10C is a schematic cross-sectional view showing the fusible conductor of the protection element of FIG. 10B after being blown.

FIG. 10D is another cross-sectional view showing the fusible conductor of the protection element of FIG. 10B after being blown intention.

FIG. 10E is another schematic cross-sectional view showing the fusible conductor of the protection element of FIG. 10B after being blown.

Figure 11 is a cross-sectional view of a protective element in accordance with an embodiment of the present invention.

FIG. 12 is a circuit diagram of a chargeable and dischargeable battery pack according to an embodiment of the present invention.

In order to further understand the features and technical contents of the present invention, reference should be made to the following related embodiments, which are described in detail below with reference to the accompanying drawings. In addition, wherever possible, the same reference numerals in the drawings In addition, the illustrations are shown in a schematic manner, and there are cases where the ratio of each size is different from the actual one, and the discretion should be made according to the following description. The examples are as follows:

[Protection element 888, 888a]

1A is an equivalent circuit diagram of a protection element 888 according to a first embodiment of the present invention, and FIG. 1B is a cross-sectional view of a protection element 888 according to a first embodiment of the present invention, and FIG. 1C is a diagram of the present invention. A top schematic view of a protective element 888 of an embodiment. Referring to FIG. 1A, FIG. 1B and FIG. 1C simultaneously, the protective element 888 of the present embodiment includes an insulating outer casing 19, two terminal electrodes, a first fusible conductor 8, and a fluxing material 91. The insulating outer casing 19 includes an insulating outer casing base 19a and an insulating outer casing upper cover 19b. The insulating outer casing base 19a has two projections 19c. The insulating outer casing upper cover 19b has a hollow projection 19d.

The two terminal electrodes include a first terminal electrode 11 and a second terminal electrode 21. The two terminal electrodes (i.e., the first terminal electrode 11 and the second terminal electrode 21) penetrate the insulating outer casing 19 and are supported by the insulating outer casing 19. One end (first end) of each of the terminal electrodes (ie, the first end electrode 11 and the second end electrode 21) is disposed (exposed) outside the insulating outer casing 19, and the other end (second end) is disposed (floating) The inside of the insulating outer casing 19 extends into the insulating outer casing 19. One of the two projections 19c may be used to support a portion of the first end electrode 11, and the other of the two projections 19c may be used to support a portion of the second end electrode 21. Further, there is a gap between the second end of the first end electrode 11 and the base 19n of the insulating outer casing 19, and a gap is also provided between the second end of the second end electrode 21 and the base 19n of the insulating outer casing 19. In this way, the end electrode (the first end electrode 11 or the second end electrode 21) and the edge outer casing 19 can be reduced from each other by the temperature of the other side. Each of the projections 19c has the advantage that the support strength of the second end of each of the terminal electrodes can be increased. In addition, since the first terminal electrode 11 and the second terminal electrode 21 are not printed on the insulating outer casing 19, the designer can adjust the thickness of the first terminal electrode 11 and the second terminal electrode 21 according to actual application or design requirements. And density to reduce the internal resistance of the first terminal electrode 11 and the second terminal electrode 21. In this way, it is possible to prevent the high temperature from flowing through the first terminal electrode 11 and the second terminal electrode 21 to cause the first terminal electrode 11 and the second terminal electrode 21 to be melted. All of the terminal electrodes of the present invention can be implemented in a manner similar to that described above. It should be noted that the insulating outer casing base 19a of the present embodiment may not have two protruding portions 19c, but the second ends of the first end electrodes 11 and the second end electrodes 21 may be insulated from the insulating outer casing base 19a. The base 19n of the outer casing base 19a is supported, or has only one projection 19c to support the first end. Whether the second end of one of the pole 11 and the second end electrode 21, whether all of the protective elements of the present invention require the projection 19c to reinforce the plurality of end electrodes (the first end electrode 11 and the second end electrode 21) The support of the two ends can be freely configured according to the needs.

The first fusible conductor 8 is disposed within the insulative outer casing 19. The first fusible conductor 8 may have a low melting conductor layer 8a and a high melting conductor layer 8b, wherein the melting points of the low melting conductor layer 8a and the high melting conductor layer 8b are not the same. Of course, the first fusible conductor 8 may also comprise only a single melting point metal layer (low melting conductor layer 8a or high melting conductor layer 8b). The two ends of the first fusible conductor 8 are electrically connected to the first end electrode 11 and the second end electrode 21 respectively to form a current path between the first end electrode 11 and the second end electrode 21 (the current I shown in FIG. 1A). The current path through which _c1 and current I _d1 flow). The fluxing material 91 is disposed between the hollow projection 19d and the first fusible conductor 8.

It should be particularly noted that the two ends of the first fusible conductor 8 are electrically connected to the first end electrode 11 and the second end electrode 21, respectively, and the method of electrical connection is generally: the first fusible conductor 8 and the first end electrode The solder 9 is filled between 11 and between the first fusible conductor 8 and the second end electrode 21, and after hot reflow, the purpose of electrical connection is achieved. Please refer to FIG. 1D. FIG. 1D is a partially enlarged schematic view of a region A of the protection element 888 illustrated in FIG. 1B. In this embodiment, three protrusions 11c and 21c are respectively formed on the first end electrode 11 and the second end electrode 21 (but the invention is not limited thereto), and the first fusible conductor 8 and the protrusion are formed. 11c, the solder 9 is filled between the first end electrodes 11, and the solder 9 is filled between the first fusible conductor 8, the protrusion 21c and the second end electrode 21. In the process of hot air reflow, a weight or an external force may be applied to the first fusible conductor 8, since the first end electrode 11 and the second end electrode 21 each have a plurality of convexities. The outlets 11c and 21c are such that a fixed distance can be maintained between the first fusible conductor 8 and the first terminal electrode 11 or the second terminal electrode 21. In this way, the solder 9 can be surely filled between the first fusible conductor 8 and the first terminal electrode 11 or the second terminal electrode 21, and the solder 9 does not overflow due to the external force, so reflow can be avoided. Poor or poor electrical connection occurs.

[Insulation outer casing, protruding portion, hollow projection]

The material of the insulating outer casing 19 (including the protruding portion 19c and the hollow convex portion 19d) can be made of an engineering plastic having good heat resistance or a material mainly composed of polyphenylene sulfide.

[terminal electrode and protrusion]

All of the material of the terminal electrode and the protrusion of the present invention comprises a sheet or strip made of a material containing, as a main component, a combination of any one of gold, silver, copper, palladium, platinum, and the like as a main component. Metal. In addition, the surface of a portion of the terminal electrode exposed outside the insulating outer casing 19 may be plated with one or more layers of metal materials such as nickel, tin, gold, etc. which are less susceptible to oxidation or stability. The projections 11c and 21c can also be formed by stamping the terminal electrodes 11 and 12.

[fusible conductor]

The material of the low-melting-point conductor layer 8a in the first fusible conductor 8 comprises a lead-containing or lead-free metal alloy containing tin as a main component, and the material of the high-melting-point conductor layer 8b in the first fusible conductor 8 contains silver, copper, An alloy consisting of tin, antimony, indium, zinc, aluminum, etc. All of the fusible conductors of the present invention are suitable for the above description.

[Solder 9]

The material of the solder 9 contains a lead-containing or lead-free composition containing tin as a main component. All of the solders of the present invention are applicable to the above description.

[Fusing material 91]

The fluxing material 91 is characterized in that its melting point or liquidus point is lower than the melting point or liquid phase point of the first fusible conductor 8, and the material thereof includes tin, silver, copper, rosin resin, surfactant, activator, softener, a composite of one or a combination of an organic solvent or the like, the main function of which is to prevent surface oxidation of a fusible conductor (eg, first fusible conductor 8), an electrode (eg, second terminal electrode 21), and When the fluxing material 91 and the fusible conductor (eg, the first fusible conductor 8) are heated, the fluxing material 91 will melt earlier or earlier than the fusible conductor (eg, the first fusible conductor 8), contributing to The melting of the molten conductor (such as the first fusible conductor 8) can also enhance the wetting and adsorption force of the electrode surface, so that the melted conductor that is later melted can quickly diffuse and adhere to the electrode (eg: second On the terminal electrode 21). All of the fluxing materials of the present invention are applicable to the above description.

[Description of the operation of protection element 888]

When a current lower than the rated current value flows through the first fusible conductor 8 (for example, the current I _c1 flows in from the first terminal electrode 11 and then flows out from the second terminal electrode 21 through the first soluble conductor 8; or, When the current _Id1 flows from the second terminal electrode 21 and flows out of the first terminal electrode 11 via the first soluble conductor 8, the protective element 888 does not operate, maintaining the original state of the protective element 888. When a current higher than the rated current value (current I _c1 or current I _d1 ) flows through the first fusible conductor 8 , the first fusible conductor 8 generates heat, causing the fluxing material 91 in the protective element 888 to liquefy or Vaporizing and removing the oxide layer on the surface of the first fusible conductor 8, and then, the low-melting-point conductor layer 8a in the first fusible conductor 8 is first melted or liquefied, and then, the high-melting-point conductor layer 8b is melted, and finally the first The fuse conductor 8 is completely blown, wherein the fuse position of the first fusible conductor 8 is located in a central region between the first end electrode 11 and the second end electrode 12 (please refer to FIG. 1E).

It should be particularly noted that the surface of the first fusible conductor 8 will increase with time, and an oxide layer will be formed, which will increase the melting or melting time of the first fusible conductor 8, and the fluxing material 91 will help. In order to remove the oxide layer on the surface of the first fusible conductor 8, the melting or fusing time of the first fusible conductor 8 can be shortened. In addition, the lower the melting point of the first fusible conductor 8, the shorter the protection element 888 protects the action, but the protection element 888 may pass through the hot air reflow furnace during the assembly process or the customer's process, so the high melting point The melting point of the conductor layer 8b must be higher than the highest temperature in the reflow process to ensure that the first fusible conductor 8 does not fuse during the assembly process. The melting point of the low-melting-point conductor layer 8a is lower than the melting point of the high-melting-point conductor layer 8b, and also contributes to shortening the time during which the first fusible conductor 8 is blown.

In addition, the protection element 888 of the embodiment may not include: a hollow protrusion 19d, a fluxing material 91, a protrusion 19c, and a plurality of protrusions 11c and 21c, etc., and does not affect the protection function of the protection element 888. Or the effect, the designer can decide whether to add the protection component 888 or the present according to different actual needs (such as the size of the insulating outer casing 19, the thickness of the first fusible conductor 8 and the length and cost of the terminal electrode). Among the structures of other protective elements of the invention, a preferred combination is achieved. Of course, the most preferable combination is a hollow projection 19d, a fluxing material 91, a projection 19c, and a plurality of projections 11c and 21c, etc., which are all included in the structure of the protection member 888, so that the protection member 888 can be lifted. The stability of the structure.

[Modification]

FIG. 1F is a cross-sectional view showing a protection element 888a according to a second embodiment of the present invention. Referring to FIG. 1A and FIG. 1F simultaneously, the protective element 888a of the present embodiment includes an insulating outer casing 19, two terminal electrodes, and a first fusible conductor 8. The insulating outer casing 19 includes an insulating outer casing base 19a and an insulating outer casing upper cover 19b. The insulating outer casing base 19a has two projections 19c. The two terminal electrodes include a first terminal electrode 11 and a second terminal electrode 21. The two terminal electrodes (ie, the first terminal electrode 11 and the second terminal electrode 21) penetrate through the insulating outer casing 19 and are supported by the insulating outer casing 19, and each of the terminal electrodes (the first terminal electrode 11 and the second terminal electrode 21) One end is disposed (exposed) outside the insulating casing, and the other end is disposed (floating) in the insulating outer casing 19 or extends into the insulating outer casing 19. One of the two protrusions 19c supports a portion of the first end electrode 11, the other of the two protrusions 19c supports the second end electrode 21, and the height of the first end electrode 11 is higher than the second end electrode 21 (It is of course also possible to design the first end electrode 11 to have a lower height than the second end electrode 21). Further, a first gap GP1 is formed between the second end of the first end electrode 11 and the base 19n of the insulating outer casing 19, and the second end of the second end electrode 21 is opposed to the base 19n of the insulating outer casing 19. There is a second gap GP2, and the first gap GP1 is larger than the second gap GP2 (of course, the first gap GP1 may be designed to be smaller than the second gap GP2).

The first fusible conductor 8 is disposed within the insulative outer casing 19. The two ends of the first fusible conductor 8 are electrically connected to the first end electrode 11 and the second end electrode 21, respectively, to form a current path between the first end electrode 11 and the second end electrode 21 (for example, current I _c1 , current I) The current path through which _d1 flows.

Referring to FIG. 1B and FIG. 1F simultaneously, the protection element 888a of the embodiment of FIG. 1F is similar to the protection element 888 of FIG. 1B, but the main difference is that the height of the first terminal electrode 11 of the embodiment of FIG. 1F is higher than that of the first embodiment. The height of the two-terminal electrode 21 (ie, the first gap GP1 is greater than the second gap GP2), so that the heights of the two ends of the first fusible conductor 8 have a drop, and the intermediate portion of the first fusible conductor 8 has a change in slope, The height drop helps to shorten the time during which the first fusible conductor 8 is blown. In addition, the protective member 888a of the embodiment of FIG. 1F does not have the hollow projection 19d and the fluxing material 91 shown in FIG. 1B. For the operation of the protection component 888a of the embodiment of FIG. 1F, reference may be made to the related description of the protection component 888 of FIG. 1B, and details are not described herein again.

[protection elements 888b, 888c with multiple current paths]

2A is a top plan view of a protection element 888b according to a third embodiment of the present invention. Referring to FIG. 2A and FIG. 1C simultaneously, the protection element 888b of the present embodiment is similar to the protection element 888 of FIG. 1C, but the main difference is that the protection element 888b of the embodiment further includes the third terminal electrode 12. One end of the third end electrode 12 is electrically connected to a central region of the first fusible conductor 8 (variation: one end of the third end electrode 12 may also be electrically connected between the first end electrode 11 and the second end electrode 21 Any region of a fusible conductor 8 such that a plurality of current paths can be formed between the first terminal electrode 11, the second terminal electrode 21, and the third terminal electrode 12.

2B is a top plan view of a protection element 888c according to a fourth embodiment of the present invention. FIG. 6 is a circuit diagram of a chargeable and dischargeable battery pack 588 according to an embodiment of the present invention, wherein the chargeable and dischargeable battery pack 588 includes an equivalent circuit diagram of the protective component 888c of the present embodiment. Referring to FIG. 2B, FIG. 1C and FIG. 6, the protection element 888c of this embodiment is similar to the protection element 888 of FIG. 1C, but the main difference is that the protection element 888c of the embodiment further includes a second fusible. Conductor 81 and third terminal electrode 12. The second fusible conductor 81 is disposed within the insulative outer casing 19. One end of the second fusible conductor 81 is electrically connected to the third end electrode 12, and the other end of the second fusible conductor 81 is electrically connected to the second end electrode 21. Two current paths (such as the current I _c1 shown in FIG. 6 and the current path through which the current I _d2 flows) may be formed between the first end electrode 11, the second end electrode 21, and the third end electrode 12; or At least two current paths of different current ratings may be formed between the first terminal electrode 11, the second terminal electrode 21 and the terminal electrode of the third terminal electrode 12 (for example, the current I _c1 and the current flowing through the current I _d2 shown in FIG. 6 ) path).

The third end electrode 12 penetrates the insulating outer casing 19 and is supported by the insulating outer casing 19. One end (first end) of the third end electrode 12 is disposed (exposed) outside the insulating outer casing 19, and the other end (second end) is disposed (floating) in the insulating outer casing 19 or extends into the insulating outer casing 19. . Furthermore, the second end of the third terminal electrode 12 has a gap with the base of the insulating outer casing 19 (please refer to the base 19n of FIG. 1B), so that a large current can be reduced to flow through the third terminal electrode 12. The temperature generated during the rise affects the temperature of the insulating outer casing 19. Of course, the second end of the third terminal electrode 12 of the present embodiment can also be directly supported by the base of the insulating outer casing 19 (ie, without a gap). In addition, since the third terminal electrode 12 is not printed on the insulating outer casing 19, the designer can adjust the thickness and density of the third terminal electrode 12 according to actual application or design requirements to reduce the inside of the third terminal electrode 12. Resistance. As a result, a large current can be prevented from flowing through the third terminal electrode 12 to generate a high temperature, so that the third terminal electrode 12 is melted.

[Protection elements 889, 889a, 889b, 889c, 889d]

FIG. 7 is a circuit diagram of a chargeable and dischargeable battery pack 588a according to an embodiment of the present invention, which includes an equivalent circuit diagram of the protective elements 889, 889a, 889b, 889c, and 889d of the present invention. FIG. 3A is a cross-sectional view showing a protection element 889 according to a fifth embodiment of the present invention. 3A, FIG. 1B and FIG. 7 , the protection element 889 of the present embodiment is similar to the protection element 888 of FIG. 1B , but the main difference is that the protection element 889 of the embodiment further includes: the insulating substrate 10 The fourth terminal electrode 31 (as shown in FIG. 7, the structure of the fourth terminal electrode 31 can be referred to FIG. 4B to be described later), the heat generating body 7, the insulating layer 16, and the fluxing material 91.

The insulating substrate 10 can be supported by the projection 19c of the insulating outer casing 19 (of course, it can also be designed to be supported by the base of the insulating outer casing 19). The heating element 7 is disposed on the upper surface 10a of the insulating substrate 10 and disposed below the second end of the second terminal electrode 21. The insulating layer 16 can be disposed (or coated) on the heating element 7. The two ends (the first end and the second end) of the heating element 7 can be electrically connected to the heating body electrodes 7a and 7b, respectively (as shown in Fig. 7). The heating body electrode 7a is disposed on the insulating substrate 10, and is disposed between the insulating layer 16, the second end electrode 21, and the first end of the heating element 7, and the first end of the heating element 7 can be electrically connected via the heating element electrode 7a. Two-terminal electrode 21. The heating body electrode 7b is disposed on the insulating substrate 10 and disposed between the second end and the fourth end electrode 31 of the heating element 7 (refer to FIG. 4B to be described later), and the second end of the heating element 7 is The heating body electrode 7b is electrically connected to the fourth terminal electrode 31. In addition, the second end of the second end electrode 21 of the embodiment may also have no or no protruding portion 19c to reinforce the support or create a gap with the base, and the heating element 7 can be used to reinforce the support or create a gap. the same effect.

The fluxing material 91 may be disposed on the surface of the first fusible conductor 8. It should be noted that the fluxing material 91 can also be disposed on the second terminal electrode 21 (not shown in FIG. 3A). When the heating element 7 generates heat, the fluxing material 91 contributes to the melting of the first fusible conductor 8 and contributes to the adsorption of the first meltable conductor 8 on the second terminal electrode 21.

FIG. 3C is a cross-sectional view showing a protection element 889a according to a sixth embodiment of the present invention. Referring to FIG. 3C, FIG. 3A and FIG. 7 simultaneously, the protection element 889a of the present embodiment is similar to the protection element 889 of FIG. 3A, but the main difference is that the heating element 7 of the protection element 889a of the embodiment is disposed on Between the heating body electrode 7a and the heating element electrode 7b (similar to a sandwich structure). Further, the heating body electrode 7a is disposed between the second end electrode 21 and the first end of the heating element 7. The first end of the heating element 7 can be electrically connected to the second end electrode 21 via the heating body electrode 7a. The heating body electrode 7b is disposed between the second end of the heating element 7 and the fourth end electrode 31, and the second end of the heating element 7 can electrically connect the fourth end electrode 31 via the second heating element electrode 7b. The fourth end electrode 31 is supported by the projection 19c of the insulating outer casing 19 (of course, the projection 19c of the insulating outer casing 19 may not be required). It should be noted that the protective element 889a of the present embodiment does not need to use the insulating substrate 10 and the insulating layer 16 shown in FIG. 3A.

FIG. 3D is a cross-sectional view showing a protection element 889b according to a seventh embodiment of the present invention. Referring to FIG. 3D, FIG. 3A and FIG. 7 simultaneously, the protection element 889b of the present embodiment is similar to the protection element 889 of FIG. 3A, but the main difference between the two is that the heating element 7 of the protection element 889b of the present embodiment is disposed at Insulating substrate 10 Inside. Further, the heating body electrode 7a may be disposed between the second end electrode 21 and the insulating substrate 10, wherein the first end of the heating element 7 may pass through at least one internal electrode or a conductive through hole of the insulating substrate 10 (not shown And the heating body electrode 7a is electrically connected to the second terminal electrode 21. The hot body electrode 7b can be disposed between the second end of the heat generating body 7 and the fourth end electrode 31, wherein the second end of the heat generating body 7 can pass through at least one internal electrode or conductive through hole of the insulating substrate 10 (not shown) And the heating body electrode 7b is electrically connected to the fourth terminal electrode 31. It should be particularly noted that the protective element 889b of the present embodiment does not require the insulating layer 16 shown in FIG. 3A.

3E is a cross-sectional view showing a protection element 889c according to an eighth embodiment of the present invention. Referring to FIG. 3E, FIG. 3A and FIG. 7 simultaneously, the protection element 889c of the present embodiment is similar to the protection element 889 of FIG. 3A, but the main difference between the two is that the heating element 7 of the protection element 889c of the embodiment is disposed on The lower surface 10b (second surface) of the insulating substrate 10. Further, the hot body electrode 7a is disposed between the second end electrode 21 and the upper surface 10a (first surface) of the insulating substrate 10, wherein the first surface 10a and the second surface 10b are opposed to each other. The first end of the heating element 7 can be electrically connected to the second end electrode 21 via at least one internal electrode or conductive via (not shown) of the insulating substrate 10 and the heating body electrode 7a. The heating body electrode 7b is disposed between the second end of the heating element 7 and the fourth end electrode 31, and the second end of the heating element 7 can electrically connect the fourth end electrode 31 via the heating element electrode 7b. It should be particularly noted that the protective element 889c of the present embodiment does not require the insulating layer 16 shown in FIG. 3A.

FIG. 3F is a cross-sectional view showing a protection element 889d according to a ninth embodiment of the present invention. Please refer to FIG. 3F, FIG. 3A and FIG. 7 simultaneously for protection of this embodiment. Element 889d is similar to protection element 889 of FIG. 3A, except that the main difference is that protective element 889d of the present embodiment further includes extension electrode 21x. One end of the extension electrode 21x is coupled to the second end electrode 21, and the other end of the extension electrode 21x is coupled to the upper surface (first surface) of the first fusible conductor 8. The technical feature of the extension electrode 21x is that when the heating element 7 generates heat, the heat energy generated by the heating element 7 can be quickly transmitted to the upper surface of the first fusible conductor 8 via the extension electrode 21x, so that the first fusible conductor 8 The upper surface is heated by the extension electrode 21x, and the lower surface (second surface) of the first fusible conductor 8 is heated by the second end electrode 21 (because the second end electrode 21 is coupled to the lower of the first fusible conductor 8) The surface, as such, the upper surface and the lower surface of the first fusible conductor 8 can be heated to shorten the time during which the first fusible conductor 8 is blown. It is worth mentioning that the extension electrode 21x of the protection element 889d of the embodiment of FIG. 3F can also be applied to the protection elements 889a, 889b, 889c shown in FIGS. 3C, 3D and 3E.

Specifically, the first end of the heating element 7 in FIGS. 3A, 3C, 3D, 3E, and 3F is electrically connected to the second end electrode 21 via the heating element electrode 7a. The general electrical connection method is: The solder 9 is filled between the heating body electrode 7a and the second terminal electrode 21, and after hot reflow, the electrical connection is achieved. Please refer to FIG. 3B. FIG. 3B is a partially enlarged schematic view of the region B illustrated by the protection element 889. The embodiment is specifically formed on the second terminal electrode 21 or between the heating body electrode 7a and the second terminal electrode 21. The bumps 21c (but not limited to three) are filled with the solder 9 between the heat generating body electrode 7a, the protruding body 21c, and the second terminal electrode 21. In the hot air reflow process, a weight or an external force may be applied to the second end electrode 21 or to the first fusible conductor 8. Since the second end electrode 21 has a plurality of protrusions 21c, The fixed distance between the hot body electrode 7a and the second end electrode 21 can be maintained, and the solder 9 can be surely filled between the heating body electrode 7a and the second end electrode 21 without overflowing due to an external force, resulting in reflowing. In the case of a defective or electrical connection failure, it is ensured that sufficient solder 9 is provided between the heating body electrode 7a and the second terminal electrode 21 to ensure the quality of soldering and good electrical connection characteristics. In addition, it is worth mentioning that all the embodiments in the present invention include an embodiment in which the fourth terminal electrode 31 and the heat generating body electrode 7b are electrically connected to the heat generating body electrode 7b. The same applies to the manner and structure in which the heating element electrode 7a is electrically connected to the second terminal electrode 21, and the description will not be repeated in the following description.

[Insulating substrate 10]

In detail, the insulating substrate 10 is a structure which may be a single layer structure or a plurality of layers. The material of the insulating substrate 10 may include an organic substrate or a glass epoxy substrate (such as FR4 or FR5) or an inorganic substrate or a ceramic substrate (such as an LTCC substrate or an HTCC substrate), etc., preferably a ceramic substrate or a low temperature. Co-fired ceramic (LTCC) substrate, the substrate material includes inorganic ceramic material, low temperature co-fired ceramic (LTCC), glass ceramic, glass powder, glass fiber, epoxy resin, alumina, aluminum nitride, zirconia, nitride A composite or composite of one or a combination thereof of cerium, boron nitride, calcium borosilicate, soda lime, aluminosilicate, lead borohydride, and an organic binder. The low temperature co-fired ceramic (LTCC) substrate is obtained by stacking a plurality of insulating substrates and then calcining or co-firing with other members in the insulating substrate.

[The heating element 7 and the heating body electrodes 7a, 7b]

The heating element 7 is an element having a relatively high resistance value (compared to the first fusible conductor) 8), and has the characteristics of heat generation when the current passes, the materials include ruthenium dioxide (RuO2), ruthenium oxide, ruthenium, copper, palladium, platinum, titanium carbide, tungsten carbide, platinum, molybdenum, tungsten, carbon black, organic One or a part of the composition of the binder or inorganic binder. The power that the heating element 7 can withstand or the heat energy that can be generated is related to its own resistance value or impedance value. Regarding the impedance value of the heating element 7, the designer can select the ratio of the different material formula or recipe or the length and cross-sectional area (width and thickness) of the heating element 7, and can print the heating element by screen printing. The material is mixed into a paste slurry and then printed on the insulating substrate 10 or in the insulating substrate 10 for calcination or co-firing.

The heating body electrodes 7a, 7b may be a single layer metal or a multilayer metal structure, and the materials of the respective layers include copper, tin, lead, iron, nickel, aluminum, titanium, platinum, tungsten, zinc, lanthanum, cobalt, palladium, silver, gold. An alloy of one or a combination of carbonyl iron, nickel carbonyl, cobalt carbonyl, or the like. In the embodiment of the present invention, the materials of the heat generating body electrodes 7a, 7b can be mixed into a paste-like slurry by screen printing, and then printed on the upper surface 10a of the insulating substrate 10, wherein The heating body electrode 7a may extend to the insulating layer 16 as needed, or may be printed on the insulating substrate 10 to extend to the upper surface 10a of the insulating substrate 10 via a via connection, or may be printed on the insulating substrate 10. The lower surface 10b is extended to the upper surface 10a of the insulating substrate 10 via a via connection, and finally calcined or co-fired.

In particular, all of the heat generating body 7 and the heat generating body electrodes 7a, 7b of the present invention can print the materials and patterns of the heat generating body 7 and the heat generating body electrodes 7a, 7b on the insulating substrate 10 by screen printing. Or in the insulating substrate, the heating body electrode 7a, 7b may extend to the surface of the insulating substrate 10 via the via connection to electrically connect the corresponding different terminal electrodes, and all the related embodiments of the present invention may adopt a similar method, and all subsequent descriptions are not described again.

【Insulation 16】

The insulating layer 16 (shown in FIG. 3A) is required only when the heating element 7 is disposed on the upper surface 10a of the insulating substrate 10. When the heat generating body 7 is disposed in the insulating substrate 10 (as shown in FIG. 3D) or on the lower surface 10b of the insulating substrate 10 (as shown in FIG. 3E), the insulating layer 16 disposed on the upper surface 10a of the insulating substrate 10 is not required. . The material of the insulating layer 16 may include an epoxy-based, acrylic-based, polyester-based, glass, or inorganic material containing SiO2 as a main component. The insulating layer 16 can also be printed on the heating element 7 and the insulating substrate 10 by screen printing to be calcined or co-fired.

[Description of the operation of the protection element 889]

When the current Ic1 or the current Id1 higher than the rated current value flows through the first fusible conductor 8, please refer to FIG. 1E and the foregoing [description of the operation of the protection element 888].

In the protection element 889 of the fifth embodiment, the protection action needs to be specifically described. Referring to FIG. 3G and FIG. 3B, when the heating element 7 is energized and heated, the heat generated by the heating element 7 can be heated via the heating body electrode 7a. The body 21c, the solder 9 and the second terminal electrode 21 conduct and conduct a portion of the first fusible conductor 8 that is radiated to the first fusible conductor 8, in particular to the second terminal electrode 21. When the temperature of the first soluble conductor 8 of the portion accumulates to the melting point of the first soluble conductor 8 (eg, the melting point of the high melting conductor layer), the portion of the first fusible conductor 8 begins to melt and begins to expand the adsorption area. Disconnecting the partially melted first fusible conductor 8 from the unmelted first fusible conductor 8 to complete the first fusible The conductor 8 is blown, and the current path between the first terminal electrode 11 and the second terminal electrode 21 is also disconnected.

[protection component 885 with side recording function]

4A is a cross-sectional view showing a protection element 885 according to a tenth embodiment of the present invention. 4B is a top plan view of a protection element 885 according to a tenth embodiment of the present invention. 9 is a circuit diagram of a chargeable and dischargeable battery pack 588c according to a third embodiment of the present invention, wherein the chargeable and dischargeable battery pack 588c includes an equivalent circuit diagram of the protective element 885 (ie, the protective elements 885a, 885b) of the present invention. Referring to FIG. 4A, FIG. 4B, FIG. 3A and FIG. 9, the protection element 885 of this embodiment is similar to the protection element 889 of FIG. 3A, but the main difference between the two is that the protection element 885 of the embodiment further includes: The five-terminal electrode 32, the channel T, and the fluxing material 91. The channel T is disposed between the first fusible conductor 8 and the fifth terminal electrode 32, and has a gap GP3 (third gap) between the channel T and the fifth terminal electrode 32. The heating body electrode 7a extends into the channel T. The fluxing material 91 is disposed on the fifth end electrode 32 and disposed in the channel T. It should be particularly noted that the closer the distance between the fifth end electrode 32 and the heating element electrode 7a or the fluxing material 91 in the channel T is, the better the voltage withstand is of course considered. In addition, the fluxing material 91 disposed in the channel T may also be unnecessary, and the molten portion of the first fusible conductor 8 may still be attracted to the fifth terminal electrode 32 due to capillary action and gravity, without affecting the protection element 885. Protection function. Of course, preferably, if the fluxing material 91 is disposed in the channel T, the heat generating body electrode 7a in the channel T is wetted, so that the melted first meltable conductor 8 can be quickly moved to shorten the first The fusing time of the fusible conductor 8.

[Description of the operation of the protection element 885]

When the current I _c1 or I _d1 higher than the rated current value flows through the first fusible conductor 8, please refer to FIG. 1E and the foregoing [Description of Operation of the Protection Element 888].

It should be particularly noted that three channels T are disposed between the first fusible conductor 8 and the fifth end electrode 32 of the protection element 885 of the present embodiment (but the invention is not limited thereto), and the channel T is preferably Three through holes extending in the thickness direction of the insulating substrate 10, and the heating element 7, the insulating layer 16, and the second end electrode 21 also have corresponding through holes, forming the first fusible conductor 8 and the fifth end electrode 32. The channel T (of course, one channel T or the through hole is also possible), and the more the number of channels T, the more the melted portion of the first fusible conductor 8 is easily blocked by capillary action when the heating element 7 is energized and heated. Attracted into the channel T, so that only a small portion of the melted first fusible conductor 8 will accumulate on the surface of the second end electrode, and the molten first fusible conductor 8 falls to the fifth due to gravity The terminal electrode 32 is filled with a gap GP3 (please refer to FIG. 4C), causing a short circuit between the second terminal electrode 21 and the fifth terminal electrode 32 to form a current path between the second terminal electrode 21 and the fifth terminal electrode 32. Thus, the speed at which the first fusible conductor 8 is blown will be faster, and the time of the fuse will shrink. This structure is highly desirable for a protective element in which the thickness of the first fusible conductor 8 must be increased due to a large current demand. More importantly, when the first fusible conductor 8 is blown, the second end can also be used. The current path of the electrode 21 (i.e., the path of the current I _c1 and the current I _d1 ) is bypassed to the fifth terminal electrode 32.

FIG. 5 is a cross-sectional view showing a protection element 887 according to an eleventh embodiment of the present invention. FIG. 8 is a circuit diagram of a chargeable and dischargeable battery pack 588b according to a fourth embodiment of the present invention, wherein the chargeable and dischargeable battery pack 588b includes an equivalent circuit diagram of the protective element 887 of the present invention. 5, FIG. 3F and FIG. 8, the protection element 887 of the present embodiment is similar to the protection element 889d of FIG. 3F, but the main difference is that the protection element 887 of the embodiment further includes a second fusible. The conductor 81 and the third terminal electrode 12 (as shown in FIG. 8, the structure of the third terminal electrode 12 can be referred to FIG. 1F). The second fusible conductor 81 is disposed in the insulating outer casing 19. One end of the second fusible conductor 81 is electrically connected to the third end electrode 12, and the other end of the second fusible conductor 81 is electrically connected to the second end electrode 21 through the extension electrode 21x (of course, as shown in FIG. 2B, the second The other end of the fuse conductor 81 is directly coupled or electrically connected to the second terminal electrode 21). As shown in FIG. 8, a plurality of currents can be formed between the first terminal electrode 11, the second terminal electrode 21, and the third terminal electrode 12. a path (ie, a path of the current I _{c1 and} a path of the current I _d2 ), or a current path of at least two different rated currents may be formed between the first end electrode 11 , the second end electrode 21 , and the third end electrode 12 (ie, The path of current I _{c1 and} the path of current I _d2 ).

When the current I _c1 or I _d2 higher than the rated current value flows through the first fusible conductor 8 or the second fusible conductor 81, please refer to FIG. 1E and the foregoing [operation description of the protection element 888], the first fusible conductor 8 or the second fusible conductor 81 will self-heat and melt.

In another case, when the heating element 7 is energized and heated, (1) the first fusible conductor 8 or the second fusible conductor 81 is blown; (2) the first fusible conductor 8 and the second fusible conductor 81 are successively The description of the fusing process is similar to that of the protective element 889 of the fifth embodiment, please refer to it yourself, and no further details are provided herein.

It should be particularly noted that the first fusible conductor 8 and the second fusible conductor 81 can select materials of different melting points, or select materials of the same melting point but have different cross-sectional areas, so that the protective element 887 of the embodiment can have Two current paths for different rated currents. In addition, if the first fusible conductor 8 and the second fusible conductor 81 select materials of the same melting point and have the same cross-sectional area, the thicknesses of the first fusible conductor 8 and the second fusible conductor 81 may also be designed not to The same (not shown), when the heating element 7 is energized and heated, the thickness of the first fusible conductor 8 and the second fusible conductor 81 can be controlled to be first melted, and the thicker one is melted. Special protection function or purpose required for charging and discharging battery pack 588b. In addition, the protection element 887 of the present embodiment may also include two heat generating bodies (as shown in FIG. 10B), which are respectively heated from two different surfaces of the first fusible conductor 8 or the second fusible conductor 81, so that the first The time at which a fusible conductor 8 or the second fusible conductor 81 is blown can be referred to the twelfth embodiment of the present invention.

[protection component 886]

FIG. 10B is a cross-sectional view showing a protection element 886 according to a twelfth embodiment of the present invention, and FIG. 10A is an equivalent circuit diagram of a protection element 886 according to a twelfth embodiment of the present invention. Referring to FIG. 10A and FIG. 10B simultaneously, the protective element 886 of the present embodiment includes an insulating outer casing 19, a plurality of terminal electrodes, a fusible conductor 8, and a plurality of heat generating bodies 7. The plurality of terminal electrodes include a first terminal electrode 11, a second terminal electrode 21, and a fourth terminal electrode 31. The terminal electrodes penetrate the insulating outer casing 19 and are supported by the insulating outer casing 19. One end of the first end electrode 11, the second end electrode 21, and the fourth end electrode 31 is disposed (exposed) outside the insulating outer casing 19, and the other end of the first end electrode 11 and the second end electrode 21 is disposed (floating) In the insulating outer casing 19, the other ends of the fourth terminal electrode 31 are disposed (floating) in the insulating outer casing 19. The fusible conductor 8 is disposed within the insulative outer casing 19. The two ends of the fusible conductor 8 are electrically connected to the first end electrode 11 and the second end electrode 21, respectively, to form a current path between the first end electrode 11 and the second end electrode 21 (ie, current I _c1 and current I _d1 ) Current path). The plurality of heat generating bodies 7 include a first heat generating body 71 and a second heat generating body 72. The first heating element 71 is disposed above a region where the soluble conductor 8 and the second end electrode 21 overlap. The first heating element 71 (the permeable heat generating body electrodes 7a, 7b) is coupled between the first surface 8-1 and the fourth end electrode 31 of the fusible conductor 8. The second heating element 72 is disposed below the second end of the second end electrode 21. The second heating element 72 (the permeable heat generating body electrodes 7a, 7b) is coupled between the second end electrode 21 and the fourth end electrode 31. When the first heating element 71 generates heat, the first heating element 71 can heat the first surface 8-1 of the soluble conductor 8, and the second heating element 72 can pass the second end electrode 21 to the soluble conductor 8 The two surfaces 8-2 are heated (because the second terminal electrode 21 is coupled to the second surface of the fusible conductor 8). In this way, the arrangement of the first heating element 71 and the second heating element 72 can achieve the function or effect of heating the fusible conductor 8 on a multi-faceted surface, especially in applications of high current (eg, rated current of 50 A or more). The cross-sectional area of the fusible conductor 8 must be increased, and multi-face heating is the best choice for the fastest fusible fusible conductor 8.

[First heating element 71, second heating element 72, and heating electrodes 7a, 7b]

The first heat generating body 71 and the second heat generating body 72 of the protective member 888 of the twelfth embodiment of the present invention compress the heat generating body material into a sheet or wafer of any shape in the form of a wafer or a sandwich, and then on both sides. Or coated with electrode material or The conductive material is sintered to form a first heat generating body 71 or a second heat generating body 72 in the middle, and the heating element electrodes 7a and 7b are formed on both sides or both ends. The first heating element 71 is disposed on the soluble conductor 8, and one end of the first heating element 71 is electrically connected to the fusible conductor 8 via the heating element electrode 7a, and the other end of the first heating element 71 is electrically connected via the heating element electrode 7b. Four-terminal electrode 31. The second heating element 72 is disposed on the second end electrode 21, and one end of the second heating element 72 is electrically connected to the second end electrode 21 via the heating element electrode 7a, and the other end of the second heating element 72 is electrically connected via the heating element electrode 7b. The fourth terminal electrode 31. Preferably, the heat generating bodies 71, 72 are coated or coated with an insulating layer to improve the withstand voltage characteristics. In addition, the method of electrically connecting is similar to the method of electrically connecting the soluble conductor 8 to the first terminal electrode 11 or the second terminal electrode 21, and is connected by solder 9. Please refer to it here, and no further details are provided herein. It is to be noted that any wafer type or wafer type resistor having a heat generating property is suitable for use in the heat generating bodies 71, 72 of the present invention.

In addition, all the embodiments of the present invention are specifically described. The first heating element 71 and the second heating element 72 may have the same resistance value or the highest rated voltage. The second heating element 72 is preferably different. The resistance value or the highest rated voltage is higher than the resistance value of the first heating element 71 or the highest rated voltage. In addition, the present invention may further include the following modified embodiment: the protective element 886 of the embodiment of FIG. 10B of the present invention may also be provided with only the first heat generating body 71 without providing the second heat generating body 72; or, the embodiment of the present invention of FIG. 10B The protective element 886 may also be provided with only the second heating element 72 without the first heating element 71, depending on the actual application or design requirements.

In addition, it is necessary to specifically describe all the terminal electrodes of the present invention, the thickness and density thereof. The degree is larger than the thickness and density of the heating body electrodes 7a, 7b. One of the main features of this embodiment is that the meltable meltable conductor 8 is the second terminal electrode 21, and its thickness, density, and melting point are superior to those of the heat generating body electrodes 7a, 7b, and the second terminal electrode 21 is not melted. The fusible conductors 8 are mutually fused and de-energized to stop heating, ensuring that the thick or large thickness of the fusible conductor 8 can be melted and adsorbed on the second terminal electrode 21.

[protection element 886a]

11 is a cross-sectional view showing a protection element 886a according to a thirteenth embodiment of the present invention, and an equivalent circuit diagram 10A. Referring to FIG. 11 and FIG. 10A simultaneously, the protective element 886a of the present embodiment includes an insulating outer casing 19, a plurality of terminal electrodes, a fusible conductor 8, two insulating substrates 10, and two heating elements 7. The plurality of terminal electrodes include a first terminal electrode 11, a second terminal electrode 21, and a fourth terminal electrode 31. These terminal electrodes penetrate the insulating outer casing 19 and are supported by the insulating outer casing 19. One end of each of the first end electrode 11, the second end electrode 21, and the fourth end electrode 31 is disposed (exposed) outside the insulating outer casing 19, and is in the first end electrode 11 and the second end electrode 21 The other end of each of the terminal electrodes is disposed (floating) in the insulating outer casing 19, and the other ends of the fourth end electrodes 31 are disposed (floating) in the insulating outer casing 19.

The fusible conductor 8 is disposed within the insulative outer casing 19. The two ends of the fusible conductor 8 are electrically connected to the first end electrode 11 and the second end electrode 21, respectively, to form a current path between the first end electrode 11 and the second end electrode 21 (ie, current I _c1 , current I _d1 path). Of the two insulating substrates 10, one of the insulating substrates 10 is disposed on the fusible conductor 8, and the other insulating substrate 10 is disposed on the fourth terminal electrode 31.

The two heat generating bodies 7 include a first heat generating body 71 and a second heat generating body 72. The first heating element 71 is disposed on one of the insulating substrates 10 and disposed above the overlapping region of the fusible conductor 8 and the second end electrode 21. One end of the first heating element 71 is electrically connected to the fusible conductor 8 via the heating element electrode 7a, and the other end of the first heating element 71 is electrically connected to the fourth end electrode 31 via the heating element electrode 7b, wherein the first heating element 71 is covered with insulation Layer 16. The second heating element 72 is disposed in the other insulating substrate 10 and disposed below the second end of the second end electrode 21. One end of the second heating element 72 is electrically connected to the fourth end electrode 31 via the heating element electrode 7b, and the other end of the second heating element 72 is electrically connected to the second end electrode 21 via the heating element electrode 7a.

Referring to FIG. 10B and FIG. 11 simultaneously, the protection element 886a of the present embodiment is similar to the protection element 886 of FIG. 10B, but the main difference is that the protection element 886a of the embodiment further includes two insulating substrates 10, wherein One insulating substrate 10 is disposed on the fusible conductor 8, the other insulating substrate 10 is disposed on the fourth end electrode 31, and the first heating element 71 is disposed on one of the insulating substrates 10, and the second heating element 72 is disposed on the other. Inside an insulating substrate 10. The first heat generating body 71 and the second heat generating body 72 of the protective member 886 of the twelfth embodiment are made of a wafer structure, and the first heat generating body 71 of the protective member 886a of the present embodiment is printed therein in a screen printing manner. On one of the insulating substrates 10, the second heat generating body 72 is printed on the insulating substrate 10 of another multilayer structure in a screen printing manner. The heat generating body electrodes 7a and 7b of the first heat generating body 71 and the second heat generating body 72 may be led to the heat generating body electrodes 7a and 7b on the side of the insulating substrate 10 or in the insulating substrate 10 via conductive vias (not shown). The insulating substrate 10 has different surfaces (e.g., upper surface and lower surface) for electrically connecting the fusible conductor 8, the second terminal electrode 21, and the fourth terminal electrode 31. Specifically, the first heating element 71, The second heat generating body 72 can be arbitrarily borrowed from the wafer type structure in the twelfth embodiment or the structural combination disposed on the insulating substrate 10 or disposed in the insulating substrate 10 in the thirteenth embodiment, and can be selected only without limitation. One or the same structure. Further, on each of the insulating substrates 10 or in the insulating substrate 10, a plurality of heat generating bodies may be connected in parallel (not shown) to increase the maximum rated voltage or higher thermal energy of the heat generating body.

[Charge and discharge battery packs 588, 588a, 588b, 588c]

FIG. 6 is a circuit diagram of a chargeable and dischargeable battery pack 588 according to an embodiment of the invention. The chargeable and dischargeable battery pack 588 includes a battery element group 4, a charge and discharge control circuit 2, a detection control circuit 5, and a protection element 888c. The battery element group 4 has four battery elements 4-1, 4-2, 4-3, 4-4 (but the invention is not limited thereto). The charge and discharge control circuit 2 is responsible for controlling the opening and closing of the charge and discharge current. The detection control circuit 5 detects voltage values or temperature values of each of the battery elements 4-1, 4-2, 4-3, and 4-4 in the battery element group 4, and outputs a signal to the charge and discharge control circuit 2. The terminal electrodes 11, 21, 12 of the protection element 888c are connected in series between the battery element group 4 and the charge and discharge control circuit 2 to form different charge and discharge paths (i.e., paths of the current _Ic1 and the current _Id2 ). The charge and discharge control circuit 2 in the chargeable and dischargeable battery pack 588 of the present embodiment can turn on and off the charge and discharge current according to the signal outputted by the external charging device 1 or the electronic device 1 and the detection control circuit 5. When the current I _c1 higher than the rated current value flows through the first fusible conductor 8 or the current I _d2 higher than the rated current value flows through the second fusible conductor 81, the first fusible conductor 8 or the second fusible conductor 81 is blown to disconnect the charging current I _c1 or the discharging current I _d2 to achieve an overcurrent protection function for protecting the battery element group 4 or the chargeable and dischargeable battery pack 588.

[Modification]

The protection element 888c in the chargeable and dischargeable battery pack 588 of FIG. 6 can also be replaced by the protection element 888 or the protection element 888a in other embodiments of the present invention, the main difference being: the charging current I _{c1 of the} protection element 888 or 888a The same as the path through which the discharge current I _d1 flows, that is, both the charging current I _c1 and the discharging current I _d1 flow through the first fusible conductor 8 , so the charging current I _c1 is the same as the rated current value of the discharging current I _d1 .

FIG. 7 is a circuit diagram of a chargeable and dischargeable battery pack 588a according to an embodiment of the present invention. The chargeable and dischargeable battery pack 588a includes a battery element group 4, a switch circuit 6, a charge and discharge control circuit 2, a detection control circuit 5, a protection element 889 or 889a or 889b or 889c or 889d, and a current limiting circuit F1. The battery element group 4 has four battery elements 4-1, 4-2, 4-3, 4-4. The initial state of the switching circuit 6 is an open circuit, which can be switched to a short circuit or turned on according to a signal output from the detection control circuit 5. The charge and discharge control circuit 2 is responsible for controlling the opening and closing of the charge and discharge current. The detection control circuit 5 detects the voltage value or the temperature value of each of the battery elements 4-1, 4-2, 4-3, and 4-4 in the battery element group 4 to output a signal to the charge and discharge control circuit 2 and the switch. Circuit 6. The terminal electrodes 11, 21 of the protection element 889 or 889a or 889b or 889c or 889d are connected in series between the battery element group 4 and the charge and discharge control circuit 2 to form a charge and discharge path (i.e., a path of the current I _c1 and the current I _d1 ). The current limiting circuit F1 is connected in series between the heating element 7 and the switching circuit 6.

FIG. 8 is a circuit diagram of a chargeable and dischargeable battery pack 588b according to an embodiment of the present invention. Referring to FIG. 8 and FIG. 7 simultaneously, the chargeable and dischargeable battery pack 588b of the present embodiment is similar to the chargeable and dischargeable battery pack 588a of FIG. 7, but the main difference is that the chargeable and dischargeable battery pack 588b of this embodiment The protective element in the present invention replaces the protective element in the chargeable and dischargeable battery pack 588a of FIG. 7 with the protective element 887 of the present invention. The protection element 887 has two current paths, one is a charging current path (ie, the path of the current I _c1 ), and the other is a discharging current path (ie, a path of the current I _d1 ), so that the rechargeable battery pack 588b of the embodiment can be The battery element group 4 is charged and discharged using different charge and discharge current values. Since the protective element 887 has the first fusible conductor 8 and the second fusible conductor 81, an overcurrent protection function of different charge and discharge currents can also be provided. In addition, when the detection control circuit 5 detects that any one of the battery elements 4-1, 4-2, 4-3, 4-4 is abnormal (for example, overcharge or overtemperature), a signal is sent to The switching circuit 6 switches the switching circuit 6 to a short-circuit state or an on-state, so that the current I7 can flow through the heating element 7. The heating element 7 fuses the first fusible conductor 8 or fuses the first fusible conductor 8 and the second fusible conductor 81 due to energization heating to disconnect the charging current I _c1 or disconnect the charging current I _c1 from the discharging current I _d2 . A function of overcharging or overvoltage or overtemperature protection of the rechargeable battery pack 588b is achieved. In addition, when the voltage across the heating element 7 is normal, the resistance value of the current limiting circuit F1 is very low, but when the voltage across the heating element 7 exceeds the rated voltage, the resistance value of the current limiting circuit F1 It is raised to limit the current passing through the heating element 7 within the rated current value to achieve the function of protecting the heating element 7.

FIG. 9 is a circuit diagram of a chargeable and dischargeable battery pack 588c according to an embodiment of the present invention. The chargeable and dischargeable battery pack 588c includes battery element groups 4a and 4b, switch circuits 6a and 6b, charge and discharge control circuit 2, detection control circuits 5a and 5b, and protection elements 885a and 885b. The battery element group 4a has two battery elements 4-1 and 4-2, and the battery element group 4b has two battery elements 4-3 and 4-4. The initial state of the switch circuits 6a and 6b is an open circuit, and the switch circuits 6a, 6b can be short-circuited or turned on depending on the input signal, respectively. The charge and discharge control circuit 2 is responsible for controlling the opening and closing of the charge and discharge current. The detection control circuit 5a can detect the voltage value or temperature value of each of the battery elements 4-1 and 4-2 in the battery element group 4a, and outputs a signal to the charge and discharge control circuit 2 and the switch circuit 6a. Similarly, the detection control circuit 5b can detect the voltage value or temperature value of each of the battery elements 4-3 and 4-4 in the battery element group 4b, and output a signal to the charge and discharge control circuit 2 and the switch circuit 6b. The terminal electrodes 11, 21 of the protection element 885a are respectively connected in series between the battery element group 4a and the charge and discharge control circuit 2, and the terminal electrodes 21, 11 of the protection element 885b are respectively connected in series between the battery element groups 4a and 4b, A charge and discharge path (ie, a path of current I _c1 and current I _d1 ) is formed. The switch circuit 6a is connected in series between the heat generating body 7 of the protection element 885a and the ground terminal G of the charge and discharge control circuit 2, and the switch circuit 6b is connected in series to the heat generating body 7 of the protection element 885b and the ground end G of the charge and discharge control circuit 2. between. The terminal electrode 32 of the protection element 885a is electrically connected to the terminal electrode 21 of the protection element 885b, and the terminal electrode 32 of the protection element 885b is connected to the ground terminal G of the charge and discharge control circuit 2.

[Rechargeable Discharge Battery Pack 588c Protection Action Description]

When the charge and discharge currents I _c1 and I _d1 higher than the rated current value flow through the first fusible conductor 8 of the protection element 885a and the first fusible conductor 8 of the protection element 885b, any of the first fusible conductors 8 will It is heated and blown to achieve the overcurrent protection function of the rechargeable battery pack 588c. In addition, when any of the battery elements 4-1, 4-2 of the battery element group 4a is overcharged or over-voltage or over-temperature, the detection control circuit 5a sends a signal to the switch circuit 6a to cause current to flow through the protection element. Heating element 885a. The heat generating body 7 of the protective member 885a fuses the first fusible conductor 8 of the protective member 885a due to energization heating, and shorts the switch S between the second terminal electrode 21 of the protective member 885a and the fifth terminal electrode 32 of the protective member 885a. Transferring (bypassing) the charge and discharge current path (ie, the path of the current I _c1 and the current I _d1 ) to the second terminal electrode 21 of the protection element 885b, so that the charge and discharge control circuit 2 charges and discharges only the battery element group 4b. The battery element group 4a is not charged and discharged. The rechargeable battery pack 588c is characterized in that when any one of the battery element groups 4a and 4b is abnormal, the entire rechargeable battery pack 588c is not charged and discharged, and only the problematic battery element group is bypassed. The technology or the protection component 885a, 885b can reduce the waste of the rechargeable battery pack 588c. Any battery component in the prior art rechargeable battery pack is abnormal. When the protection component is activated, the entire rechargeable battery pack is It is impossible to charge and discharge, resulting in waste of resources.

FIG. 12 is a circuit diagram of a chargeable and dischargeable battery pack 588d according to an embodiment of the present invention. The chargeable and dischargeable battery pack 588d of the present embodiment includes a battery element group 4, a switch circuit 6, a charge and discharge control circuit 2, a detection control circuit 5, a protection element 886 or 886a, and a current limiting circuit F1. The battery element group 4 has four battery elements 4-1, 4-2, 4-3, 4-4. The initial state of the switching circuit 6 is an open circuit, which can be switched to a short-circuit state or an on-state according to an input signal. The charge and discharge control circuit 2 is used to control the opening and closing of the charge and discharge current. The detection control circuit 5 can respectively detect the voltage value or temperature value of each of the battery elements 4-1, 4-2, 4-3, 4-4 in the battery component group 4, and output a signal to the charge and discharge control circuit 2 and Switch circuit 6. The terminal electrodes 11, 21 of the protection element 886 or 886a are connected in series between the battery element group 4 and the charge and discharge control circuit 2 to form a charge and discharge path (i.e., a path of the current I _c1 and the current I _d1 ). The current limiting circuit F1 is connected in series between the heating element 7 and the switching circuit 6.

It should be noted that the current limiting circuit package 588a, 588b, and 588d of the embodiment of the present invention may not include the current limiting circuit F1. The main feature of the current limiting circuit F1 is that if the voltage across the heating element 7 exceeds the highest rated voltage, the current limiting circuit F1 limits the current flowing through the heating element 7 to achieve the function or effect of protecting the heating element 7. . However, if the battery element group 4 of the rechargeable battery packs 588a, 588b, and 588d or the input voltage does not generate an abnormal voltage or exceeds the maximum rated voltage, the current limiting circuit F1 may not be required. Of course, if the current limiting circuit F1 is added, the protection effect will be better, but some manufacturing or product costs will be added.

[Rechargeable Discharge Battery Pack 588d Protection Action Description]

In the chargeable and dischargeable battery pack 588d of the present embodiment, when the external device is the charging device 1 or the electronic device 1, and the charge and discharge currents (I _c1 and I _d1 ) higher than the rated current value flow through the fusible conductor 8 The fusible conductor 8 is heated and blown (please refer to FIG. 10C) to achieve the overcurrent protection function of the rechargeable battery pack 588d. In addition, when the external device is the charging device 1, and the detection control circuit 5 detects that any of the battery elements 4-1, 4-2, 4-3, and 4-4 in the battery element group 4 is overcharged or overvoltaged. When the temperature is too high, the detection control circuit 5 sends a signal to the switch circuit 6 to switch the switch circuit 6 that is in the open state to the on or short circuit state. At this time, the current will flow through the first heat generating body 71 and the second heat. The body 72 causes the first heating element 71 and the second heating element 72 to be electrically heated, and fuses the fusible conductor 8 (please refer to FIG. 10D, FIG. 10E, the mode in which the fusible conductor 8 is blown includes: FIG. 10D, FIG. 10E Either of the two) and disconnecting the second terminal electrode 21 from the first terminal electrode 11 to disconnect or cut off the charge and discharge current path (ie, the path of the current I _c1 and the current I _d1 ) Therefore, the charge and discharge control circuit 2 cannot continue to charge or discharge the battery element group 4, and the overvoltage or overtemperature protection function of the chargeable and dischargeable battery pack 588d is achieved.

It should be noted that the protection component 888d in the rechargeable battery pack 588 of the embodiment fuses the fusible conductor 8 and stops the battery component group when the battery component group 4 is overcharged or overvoltage or overheated. 4 charging and discharging, but at this time the battery element group 4 may still be in an overcharge or overvoltage or over temperature state, the protection element 888d of the present invention can still provide a discharge path through the heating elements 71, 72, so that the battery element group 4 can Release the overcharge or over voltage or over temperature condition.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

7‧‧‧heating body

7a‧‧‧Heating body electrode

8‧‧‧First fusible conductor

10‧‧‧Insert substrate

10a‧‧‧Upper surface, first surface

11‧‧‧First-end electrode

16‧‧‧Insulation

19‧‧‧Insulated outer casing

19a‧‧‧Insulated outer casing base

19b‧‧‧Insulated outer casing cover

19c‧‧‧protrusion

21‧‧‧second end electrode

889‧‧‧protective components

9‧‧‧ solder

91‧‧‧Fused materials

B‧‧‧Area

Claims (17)

A protective component includes: an insulating outer casing; a plurality of terminal electrodes including a first terminal electrode and a second terminal electrode, the terminal electrodes penetrating through the insulating outer casing and supported by the insulating outer casing, each of the terminal electrodes a first end of the first outer end is disposed outside the insulating outer casing, and a second end of each of the end electrodes is disposed in the insulating outer casing, wherein the second end of the second end electrode and the base of the insulating outer casing Having a second gap therebetween; a first fusible conductor disposed in the insulative housing, the two ends of the first fusible conductor being electrically connected to the first end electrode and the second end electrode, respectively, at the first end electrode Forming a current path with the second terminal electrode; and at least one heat generating body disposed under the second end of the second terminal electrode or disposed at an overlap region between the first soluble conductor and the second terminal electrode Above the first end of the at least one heating element is electrically connected to the second end of the second terminal electrode. The protective element of claim 1, wherein: the second end of the first end electrode is supported by a base or a protrusion of the insulating outer casing; or the protective element further comprises a fluxing material, wherein The fluxing material is disposed between the insulating outer casing and the first fusible conductor. The protection element of claim 1, further comprising: a plurality of protrusions respectively disposed between the first fusible conductor and at least one of the terminal electrodes; Solder disposed between the first fusible conductor and at least one of the terminal electrodes. The protection element of claim 1, wherein: the second end of the first end electrode and the base of the insulating outer casing have a first gap, and the first gap is larger or smaller than the first a second gap; and the central region of the first fusible conductor has a change in slope. The protection element of claim 1, wherein the terminal electrodes further comprise: a third end electrode, one end of the third end electrode being electrically connected to the first fusible conductor, such that between the end electrodes A plurality of current paths are formed. The protection element of claim 1, further comprising: a second fusible conductor disposed in the insulative housing, and one end of the second fusible conductor is electrically connected to the second end electrode, wherein the ends The electrode further includes a third end electrode, one end of the third end electrode being electrically connected to the other end of the second fusible conductor such that a plurality of current paths are formed between the end electrodes. The protection element of claim 6, wherein the terminal electrodes further comprise a fourth end electrode electrically connected to the second end of the at least one heating element, and when the at least one heating element is energized After the heat is generated, the heat generated by the at least one heat generating body fuses at least one of the first fusible conductor and the second fusible conductor. The protective element according to any one of the preceding claims, wherein the second end electrode is coupled to the second surface of the first fusible conductor, wherein the protective element further comprises: an extension electrode One end of the extension electrode is coupled to the second end of the second end electrode, and the other end of the extension electrode is coupled to the first surface of the first fusible conductor. The protective element according to any one of claims 1 to 6, wherein the terminal electrodes further comprise a fourth terminal electrode, wherein the protection component further comprises: an insulating substrate, wherein the at least one heat generating body is configured And disposed on the insulating substrate or the insulating substrate, wherein the second end of the at least one heating element is electrically connected to the fourth terminal electrode. The protection element according to any one of the preceding claims, wherein the terminal electrodes further comprise a fourth terminal electrode, wherein the protection element further comprises: a first heating element electrode disposed at the first Between the two end electrodes and the first end of the at least one heat generating body, wherein the first end of the at least one heat generating body is electrically connected to the second end electrode via the first heat generating body electrode; and the second heat generating body electrode Between the second end of the at least one heating element and the fourth end electrode, wherein the second end of the at least one heating element is electrically connected to the fourth end electrode via the second heating element electrode, wherein the The second end electrode, the first heating element electrode, the at least one heating element, the second heating element electrode and the fourth end electrode form a sandwich structure. The protection element according to any one of claims 1 to 7, further comprising: a fifth end electrode; and at least one channel disposed between the first fusible conductor and the fifth end electrode, and a third gap between the at least one channel and the fifth end electrode When the at least one heating element generates heat, the molten first fusible conductor flows into the at least one channel and the third gap, so that a short circuit between the second end electrode and the fifth end electrode is performed at the second end electrode Another current path is formed with the fifth terminal electrode. The protective element according to any one of the preceding claims, wherein the second end electrode is coupled to the second surface of the first fusible conductor, wherein the end electrodes further comprise a fourth end An electrode, wherein the at least one heating element comprises: a first heating element coupled between the first surface of the first fusible conductor and the fourth end electrode; and a second heating element coupled to the second end Between the electrode and the fourth end electrode, when the at least one heating element generates heat, the first heating element heats the first surface of the first fusible conductor, and the second heating element passes the second end An electrode heats the second surface of the first fusible conductor. The protection element of claim 12, further comprising: a first insulating substrate, wherein the first heating element is disposed on the first insulating substrate or the first insulating substrate; and a second insulating substrate, wherein The second heating element is disposed on the second insulating substrate or in the second insulating substrate. A rechargeable battery pack comprising: at least one battery component group; The protective element according to any one of claims 1 to 13, wherein the protective element is connected in series with the at least one battery element group to form at least one charge and discharge current path, when flowing through the protective element The protection element turns off at least one of the at least one charge and discharge current path when the charge/discharge current exceeds the rated current value and an overcurrent condition occurs. The rechargeable battery pack of claim 14, further comprising: a detection control circuit for detecting a voltage or a temperature of the at least one battery component group; and a charge and discharge control circuit for using the detection Measuring the state of the voltage detected by the control circuit and the type of the external device, and determining whether to transmit the charging current from the external device to the at least one battery component group or to transmit a discharge current from the at least one battery component group to the external device . A rechargeable battery pack comprising: at least one battery component group; the protective component according to any one of claims 1 to 13, wherein the protective component is connected in series with the at least one battery component group Forming at least one charge and discharge current path; a switch circuit coupled to the second end of the at least one heat generating body; and a detection control circuit for detecting a voltage or a temperature of the at least one battery component group, according to the detected The voltage or temperature determines the state of the switching circuit, wherein the switching circuit is if the voltage or temperature of the at least one battery component group is normal Being held in an open state, if the voltage or temperature of the at least one battery component group is abnormal, the switch circuit is switched to an on state, causing the protection component to be disconnected from the at least one charge and discharge between the at least one battery component group At least one of the current paths disconnects at least one of the at least one charge and discharge current path when an overcurrent condition occurs when a charge and discharge current flowing through the protection element exceeds a rated current value. A rechargeable battery pack comprising: a plurality of battery component groups, each of the battery component groups comprising at least one chargeable and dischargeable battery component; and the plurality of protective components according to claim 11 The protection elements are connected in series with the battery element groups to form a charge and discharge current path; a plurality of switch circuits, each of the switch circuits being coupled to the fourth end electrode of one of the protection elements; a detection control circuit for detecting a voltage or a temperature of the battery component group, and determining a state of each of the switch circuits according to the detected voltage or temperature, wherein a voltage of the battery component group Or the temperature is normal, the switch circuits are kept in an open state, and if the voltage or temperature of any one of the battery element groups is abnormal, the switch circuit corresponding to the abnormal battery element group is switched to the on state. Causing the protection element corresponding to the abnormal battery element group to disconnect the charge and discharge current path between the abnormal battery element group, and cutting the charge and discharge current path To the plurality of battery cell groups remaining normal battery element group flows when any one of the plurality of protective elements of a charge-discharge current exceeds the rated current When an overcurrent condition occurs, the protection element that has an overcurrent condition turns off the charge and discharge current path.