[go: up one dir, main page]

WO2012169442A1 - Coupe-circuit, circuit de sécurité le comprenant et ensemble de batterie secondaire - Google Patents

Coupe-circuit, circuit de sécurité le comprenant et ensemble de batterie secondaire Download PDF

Info

Publication number
WO2012169442A1
WO2012169442A1 PCT/JP2012/064270 JP2012064270W WO2012169442A1 WO 2012169442 A1 WO2012169442 A1 WO 2012169442A1 JP 2012064270 W JP2012064270 W JP 2012064270W WO 2012169442 A1 WO2012169442 A1 WO 2012169442A1
Authority
WO
WIPO (PCT)
Prior art keywords
contact
breaker
piece
movable
resin case
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/064270
Other languages
English (en)
Japanese (ja)
Inventor
北川俊也
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsulite Manufacturing Co Ltd
Original Assignee
Komatsulite Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Komatsulite Manufacturing Co Ltd filed Critical Komatsulite Manufacturing Co Ltd
Priority to JP2013519473A priority Critical patent/JP5452771B2/ja
Publication of WO2012169442A1 publication Critical patent/WO2012169442A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/04—Bases; Housings; Mountings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
    • H01H37/5427—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing

Definitions

  • the present invention relates to a small breaker incorporated in a secondary battery.
  • breakers using bimetal In the case of breakers using bimetal, abnormalities such as when an overcurrent flows through a motor or the like installed in a device such as an automobile or home appliance, or when the temperature of the secondary battery during charging or discharging rises excessively occur. At the same time, it is used as a protection device that cuts off the current flowing in the motor, the secondary battery and the like.
  • Such breakers when used in DC circuits for motors and chargers for automobiles, AC circuits for fan motors and washing machines for air conditioners, etc., can operate accurately to ensure the safety of equipment. Desired. Further, when used in a secondary battery or the like equipped in a mobile phone, a notebook computer, etc., in addition to ensuring the above-described safety, further downsizing has been demanded with recent downsizing of devices.
  • Patent Document 1 discloses a breaker using such a bimetal.
  • the breaker shown in the same document is a fixed piece (base terminal), movable piece (movable arm), bimetal, PTC (Positive s Temperature Coefficient) thermistor, etc. housed in a resin case.
  • One terminal is used by being connected to an electric circuit of an electric device.
  • FIG. 3 and the like of the same document an embodiment in which a cover piece (cover terminal) is insert-molded on the lid member of the resin case is disclosed.
  • the cover piece has an intermediate retainer and a stopper, and even if the movable piece is pushed up by a small width, the movable piece will come into contact with the intermediate restraint and the stopper to increase the width of the movable contact's movable contact. Separate the contact of the movable piece and the contact of the fixed piece.
  • the present invention has been made to solve the above-described problem, and provides a breaker capable of realizing further downsizing and thinning while maintaining a stable contact / non-contact state between a fixed contact and a movable contact.
  • the purpose is to provide.
  • the present invention has a fixed piece having a fixed contact, a movable contact, a movable piece that presses and contacts the movable contact with the fixed contact, and is deformed as the temperature changes.
  • a breaker comprising: a thermal response element that operates the movable piece so that the movable contact is separated from the fixed contact; and a resin case that houses the fixed piece, the movable piece, and the thermal response element. Is characterized in that a plate-like cover piece having a bead portion is integrally formed.
  • the resin case is integrally formed with a plate-like cover piece having a bead, so that the rigidity and strength of the resin case can be drastically increased without increasing the thickness of the breaker. Can be increased.
  • the rigidity and strength are the same as those of the prior art, the thickness of the resin case and the cover piece can be reduced, and the thickness of the breaker can be reduced to achieve downsizing and thinning.
  • the assembly perspective view which shows the structure of the breaker by 1st Embodiment of this invention.
  • Sectional drawing which shows operation
  • Sectional drawing which shows operation
  • the top view which shows the structure of the cover member of the breaker.
  • (A) is the sectional view on the AA line in FIG. 4,
  • (b) is the sectional view on the BB line in FIG.
  • the perspective view which shows the structure of the cover piece.
  • (A) is a bending stress applied to a breaker
  • (b) is a bending stress applied to a breaker
  • (c) is a figure which shows the pressing stress applied to a breaker.
  • the top view which shows the structure of the modification of the bead part formed in a cover piece.
  • the top view which shows the structure of another modification of the bead part formed in a cover piece.
  • Sectional drawing which shows the structure of the breaker by 2nd Embodiment of this invention. Sectional drawing which shows the operation
  • Sectional drawing which shows the structure of the metal mold
  • Sectional drawing which shows the structure of the modification of the breaker.
  • the top view which shows the structure of the secondary battery pack provided with the breaker of this invention.
  • FIG. 1 shows a configuration of a breaker according to the first embodiment.
  • the breaker 1 includes a fixed piece 2 having a fixed contact 21, a movable piece 4 having a movable contact 3 at the tip, a thermally responsive element 5 that deforms with a change in temperature, and a PTC (Positive Temperature Coefficient) thermistor 6.
  • the resin case 7 includes a case body 71 and a lid member 72 attached to the upper surface of the case body 71.
  • the fixed piece 2 is formed by pressing a conductive metal plate such as phosphor bronze (in addition, a metal plate such as copper-titanium alloy, white or brass), and is incorporated into the case body 71 by insert molding. It is.
  • a terminal 22 is formed at one end of the fixed piece 2, and a PTC thermistor 6 is placed at the center.
  • the fixed contact 21 is formed by clad, plating, coating, or the like of a conductive material such as silver, silver-nickel alloy, copper-silver alloy, gold-silver alloy, and the like, and is formed above the case body 71. A part of the opening 73 is exposed.
  • the terminal 22 protrudes outward from one end of the case body 71.
  • the movable piece 4 is formed in an arm shape by pressing a metal plate equivalent to the fixed piece 2.
  • a terminal 41 is formed at one end in the longitudinal direction of the movable piece 4 and protrudes outward from the case body 71, and a movable contact 3 is formed at the other end (corresponding to the tip of the arm-shaped movable piece 4).
  • the movable contact 3 is formed of the same material as that of the fixed contact 21 and is joined to the tip of the movable piece 4 by a technique such as welding.
  • the movable piece 4 has a fixed portion 42 (corresponding to the base end of the arm-shaped movable piece 4) and an elastic portion 43 between the movable contact 3 and the terminal 41.
  • the movable piece 4 is fixed by being sandwiched between the case main body 71 and the lid member 72 in the fixed portion 42, and the elastic portion 43 is elastically deformed, whereby the movable contact 3 formed at the tip thereof is pressed against the fixed contact 21 side.
  • the fixed piece 2 and the movable piece 4 can be energized.
  • a protrusion 44 is formed on the lower surface of the elastic portion 43 so as to face the thermal response element 5.
  • the protrusions 44 are in contact with the thermally responsive element 5 and efficiently transmit the deformation of the thermally responsive element 5 to the elastic portion 43 (see FIGS. 2 and 3).
  • a material having good conductivity such as phosphor bronze is preferable.
  • a conductive elastic material such as copper-titanium alloy, white or brass is also used.
  • the movable piece 4 is curved or bent at the elastic portion 43 by press working. The degree of bending or bending is not particularly limited as long as the thermally responsive element 5 can be accommodated, and may be set as appropriate in consideration of the elastic force at the operating temperature and the return temperature, the pressing force of the contacts, and the like.
  • the thermoresponsive element 5 has a curved shape in an arc shape and is made of a composite material such as bimetal or trimetal. When the operating temperature is reached due to overheating, the curved shape is reversed, and when it falls below the return temperature due to cooling, it is restored. Since the thermoresponsive element 5 is usually a bimetal, it is hereinafter referred to as a bimetal 5 unless otherwise specified.
  • the shape of the bimetal 5 can be formed by pressing.
  • the material and shape of the bimetal 5 are not particularly limited as long as the elastic part 43 of the movable piece 4 is pushed up by the reversing operation of the bimetal 5 at a predetermined temperature and returns to the original state by the elastic force of the elastic part 43.
  • the bimetal 5 is made of, for example, copper-nickel-manganese alloy or nickel-chromium-iron alloy on the high expansion side, iron-nickel alloy on the low expansion side, white, brass, stainless steel, etc. What laminated
  • the current flowing through the PTC thermistor 6 increases.
  • the PTC thermistor 6 is a positive temperature coefficient thermistor that limits the current by increasing the resistance value as the temperature rises, the type of operation current, operation voltage, operation temperature, return temperature, etc. can be selected as necessary.
  • the shape is not particularly limited as long as these properties are not impaired.
  • the case main body 71 and the lid member 72 constituting the resin case 7 are formed of a resin such as flame retardant polyamide, polyphenylene sulfide (PPS), liquid crystal polymer (LCP), polybutylene terephthalate (PBT) having excellent heat resistance. ing.
  • the case body 71 is formed with an opening 73 for accommodating the fixed piece 2, the movable piece 4, the bimetal 5, the PTC thermistor 6, and the like.
  • the movable piece 4, the bimetal 5 and the PTC thermistor 6 incorporated in the case body 71 are brought into contact with each other by frames 74, 75 and 76 formed inside the opening 73, and are guided when the bimetal 5 is reversed.
  • the cover piece 8 is embedded in the lid member 72 by insert molding.
  • the cover piece 8 is covered with the lid member 72 over the entire upper surface.
  • the cover piece 8 is formed by pressing a metal plate mainly composed of phosphor bronze or a metal plate such as stainless steel. As shown in FIGS. 2 and 3, the cover piece 8 is appropriately brought into contact with the upper surface of the movable piece 4 to restrict the movement of the movable piece 4, and the rigidity of the resin case 7 as a casing and the casing 7 as a case. Increase strength.
  • a lid member 72 is mounted on the upper surface of the case body 71 so as to close the opening 73 of the case body 71 that houses the fixed piece 2, the movable piece 4, the bimetal 5, the PTC thermistor 6, and the like.
  • the case main body 71 and the lid member 72 are usually joined by ultrasonic welding.
  • the lid member 72 may have a metal part. Having a metal part is advantageous for miniaturization from the viewpoint of mechanical strength. Further, by providing a cover terminal on the metal part, it is possible to supply a spare power source to other parts of the safety device.
  • FIG. 2 shows the operation of the breaker 1 in a normal charging or discharging state.
  • the bimetal 5 In a normal charge or discharge state, the bimetal 5 is rotating forward (before reversal), the fixed contact 21 and the movable contact 3 are in contact, and both terminals 22 of the breaker 1 through the elastic portion 43 of the movable piece 4 and the like. , 41 are electrically connected.
  • the elastic part 43 of the movable piece 4 and the bimetal 5 are in contact with each other, and the movable piece 4, the bimetal 5, the PTC thermistor 6 and the fixed piece 2 are electrically connected as a circuit.
  • FIG. 3 shows the operation of the breaker 1 in an overcharged state or an abnormality.
  • the bimetal 5 that has reached the operating temperature is reversed, the elastic portion 43 of the movable piece 4 is pushed up, and the fixed contact 21 and the movable contact 3 are separated. To do.
  • the current flowing between the fixed contact 21 and the movable contact 3 is interrupted, and a slight leakage current flows through the bimetal 5 and the PTC thermistor 6.
  • FIGS. 4 and 5 show the lid member 72 in which the cover piece 8 is embedded.
  • a concave portion 72a is formed on the inner surface of the lid member 72 so as to be recessed upward from the edge thereof, and the cover piece 8 faces the concave portion 72a and is exposed to the inner surface side of the lid member 72 (inside the resin case 7). is doing.
  • the cover piece 8 is formed by punching a metal plate by press working.
  • a plurality of linearly continuous bead portions 81 are formed on the cover piece 8 so as to protrude in the outer direction of the lid member 72, that is, in the direction in which the top surface 72b of the lid member 72 is formed during insert molding.
  • a plurality of bead portions 81 are extended in parallel along the longitudinal direction of the resin case 7 on the upper surface of the cover piece 8.
  • the shape of the bead portion 81 preferably includes a component in the longitudinal direction of the breaker 1 because an external force such as bending or bending (see FIG. 8) is easily applied to the breaker 1.
  • the bead portion 81 is simultaneously formed in the step of punching the cover piece 8 from the metal plate by press working. Therefore, the productivity of the breaker 1 of the present embodiment is not different from that of the conventional breaker, and there is no possibility of increasing the cost.
  • FIG. 8 shows an example of stress applied to the breaker 1. That is, in FIG. 8, (a) shows a state in which bending stress is applied to the breaker 1, (b) shows a state in which bending stress is applied to the breaker 1, and (c) shows a state in which pressing stress is applied to the breaker 1. In (a), one end of the breaker 1 is held by the holding portions 10 and 11, in (b), both end portions of the breaker 1 are placed on the holding portions 12 and 13, and in (c), The breaker 1 is placed on a holding table 14. The breaker 1 is pressed by the pressing portion 15 in the direction of the white arrow, and stress is applied.
  • the inventor of the present application energizes the breaker 1 of the present embodiment having the conventional breaker and the cover piece 8 formed with the bead portion 81 while applying bending stress, bending stress, or pressing stress, and the resistance value is predetermined.
  • the contact / non-contact state between the fixed contact and the movable contact was confirmed by measuring the stress when the lower limit of the standard value was reached.
  • the breaker 1 of this embodiment has a higher stress when the resistance value reaches the lower limit of the standard value as compared with the breaker of the member and the cover piece having the same structure as the conventional one. From this, it was confirmed that the breaker 1 of this embodiment maintains a stable contact / non-contact state between the fixed contact and the movable contact even when the applied stress increases.
  • the thickness of the breaker 1 can be dramatically increased.
  • the rigidity and strength are the same as the conventional one, the thickness of the top surface 72b of the lid member 72 and the cover piece 8 can be reduced, and the thickness of the breaker 1 can be reduced to reduce the size and thickness. It becomes possible to plan.
  • the cover piece 8 is preferably disposed on the inner surface of the resin case 7, and the bead portion 81 protrudes in the outer direction of the resin case 7.
  • the bead part 81 projecting outward, the projecting bead part 81 is embedded in the top surface 72b of the lid member 72 and does not project from the inner surface or the outer surface of the resin case 7. .
  • the thickness of the breaker 1 can be further reduced, and the size and thickness can be reduced.
  • FIG. 9 shows a modification of the bead portion 81 formed on the cover piece 8.
  • the bead portion 81 extends along the longitudinal direction of the resin case 7 while meandering.
  • the rigidity and strength against torsion can be increased, and the breaker 1 can be reduced in size and thickness even in a situation where torsional stress is applied. It is possible to maintain the operation performed.
  • FIG. 10 shows another modification of the bead portion 81 formed on the cover piece 8.
  • the bead portion 81 is formed at an angle of attack of about 45 ° with respect to the longitudinal direction of the resin case 7.
  • the angle of attack of the bead portion 81 with respect to the longitudinal direction of the resin case 7 is not limited to approximately 45 °, and can be set as appropriate according to the orientation of the breaker 1 mounted on a secondary battery or the like.
  • the bead portion 81 extends in a specific direction as described above, whereby the rigidity / strength in a specific direction according to the posture of the breaker 1 mounted on the secondary battery or the like. Therefore, it is possible to maintain a stable operation while reducing the size and thickness of the breaker 1.
  • the specific direction mentioned here is not limited to a uniform direction, and may be a plurality of directions.
  • the bead portions 81 may be formed so as to cross each other. In such a configuration, the rigidity and strength of the breaker 1 can be improved as a whole.
  • FIG. 11 shows a configuration of a breaker according to the second embodiment of the present invention.
  • FIG. 12 shows the operation of the breaker in an overcharged state or when an abnormality occurs.
  • the breaker 1 ⁇ / b> A is different from the breaker 1 in that an opening 79 is provided in the top surface 72 b of the lid member 72 and that projections 82 a and 82 b are provided in the cover piece 8.
  • FIG. 13 shows the configuration of the lid member 72 in the AA line section and the BB line section equivalent to FIG.
  • the opening 79 is formed to penetrate the top surface 72 b of the lid member 72 from the outer surface of the lid member 72.
  • the cover piece 8 is partially exposed by the opening 79.
  • the opening 79 is formed at a location that does not overlap with the bead portion 81 and the protrusions 82a and 82b in plan view. For this reason, the bead part 81 and the protrusions 82a and 82b are not exposed to the outside of the resin case 7. That is, the outer side (the upper side in FIG. 11) of the cover piece 8 where the bead portion 81 and the protrusions 82 a and 82 b are formed is covered with the resin constituting the top surface 72 b of the lid member 72.
  • the surface area of the cover piece 8 is locally increased, and heat tends to be easily released at that portion.
  • the outside of the portion of the cover piece 8 where the bead portion 81 and the protrusions 82a and 82b are formed is covered with the resin constituting the top surface 72b of the lid member 72. Since the bead part 81 and the protrusions 82a and 82b are not exposed to the outside of the resin case 7, it is possible to suppress an increase in heat released from the bead part 81 and the protrusions 82a and 82b.
  • the protrusions 82a and 82b are arranged on the line AA in FIG. 4 (that is, on the center line in the longitudinal direction of the lid member 72), and are sandwiched by a plurality of bead portions 81 in FIG. 13B. Further, as is clear from FIG. 13A, since the bead portion 81 is disposed in the vicinity of the bead portion 81 to such an extent that the reinforcement effect reaches, even if any external force is applied to the lid member 72, the protrusion Deformation of 82a and 82b and the vicinity thereof, that is, fluctuations in the position and posture of the projections 82a and 82b are suppressed.
  • the protrusions 82a and 82b formed on the cover piece 8 protrude toward the inner side of the resin case 7, that is, toward the movable piece 4.
  • the protrusion 82 a is disposed in the vicinity of the protrusion 44 a of the movable piece 4, and 82 b is disposed in the vicinity of the protrusion 44 b of the movable piece 4.
  • the protrusion 44 a of the movable piece 4 is disposed in the vicinity of the fixed portion 42, and the protrusion 44 b of the movable piece 4 is disposed in the vicinity of the movable contact 3.
  • the protrusion 82a is always in contact with the front surface of the movable piece 4, and heat is exchanged between them. That is, as shown in FIG. 11, when the movable contact 3 and the fixed contact 21 are in contact (when the fixed piece 2 and the movable piece 4 are in a conductive state), and as shown in FIG. When 3 is separated from the fixed contact 21 (when the fixed piece 2 and the movable piece 4 are in a non-conducting state), the movable piece 4 is in contact with the cover piece 8 via the protrusion 82a.
  • the protrusion 82b is separated from the movable piece 4 in the conductive state shown in FIG. 11, and contacts the movable piece 4 and restricts deformation of the movable piece 4 in the non-conductive state shown in FIG.
  • FIG. 14 shows a configuration of a mold for embedding the cover piece 8 and molding the lid member 72.
  • the mold 100 is covered with a cover piece 8 in a cavity space 103 defined by a first mold 101 and a second mold 102 and filled with a resin material from a nozzle (not shown) and cured.
  • the member 72 is formed.
  • the first mold 101 molds the inner surface (back surface) of the lid member 72
  • the second mold 102 molds the outer surface (front surface) of the lid member 72.
  • the second mold 102 is in contact with the surface of the cover piece 8 placed on the first mold 101, and a fixing portion 104 that presses and fixes the cover piece 8 against the first mold 101 is provided in the cavity space 103. Protrusively formed.
  • the cover piece 8 may be displaced in the mold due to the pressure of the resin material to be filled.
  • the lid member 72 in which the cover piece 8 is embedded with high accuracy can be formed.
  • the lid member 72 has an opening 79 penetrating the top surface 72 b.
  • the lid member 72 in which the cover piece 8 is embedded with high accuracy can be formed.
  • the breaker 1A of the present embodiment at least the outside of the cover piece 8 where the bead portion 81 is formed is covered with the top surface 72b of the lid member 72, so that the movable contact 3 is the fixed contact 21.
  • the member 72 can prevent the heat transmitted from the movable piece 4 to the cover piece 8 from being released to the outside of the breaker 1 ⁇ / b> A when being separated from the breaker 1 ⁇ / b> A.
  • the surface area of the portion where the bead portion 81 is formed tends to increase locally, and the released heat tends to increase.
  • the outside of the portion where the bead portion 81 is formed is covered with the lid member 72 of the resin case 7, thereby suppressing the release of heat from the bead portion 81.
  • the temperature fall of the bimetal 5 can be suppressed and it can prevent that the deformation
  • the cover piece 8 has a protrusion 82 a that protrudes inward of the resin case 7, and the protrusion 82 a comes into contact with the movable piece 4 to urge the elastic portion 43 of the movable piece 4 toward the fixed contact 21. .
  • the contact state of the movable contact 3 and the fixed contact 21 is kept good in the conductive state shown in FIG.
  • the cover piece 8 has a protrusion 82 b protruding toward the inner side of the resin case 7, and the protrusion 82 b comes into contact with the movable piece 4 to restrict deformation of the movable piece 4.
  • tip part of the movable piece 4 is controlled by an exact position.
  • the cover piece 8 receives a reaction force from the projections 82a and 82b, but since it is reinforced by the bead portion 81, the deformation of the cover piece 8 is suppressed, and the positions of the projections 82a and 82b are reduced. Variation is suppressed.
  • the movable piece 4 is regulated at a more accurate position, and excessive deformation of the movable piece 4 can be suppressed and the movable contact 3 can be put on standby at an appropriate position.
  • the movable piece 4 is urged with an appropriate force, and the contact state between the movable contact 3 and the fixed contact 21 is kept good.
  • the lid member 72 is subjected to an appropriate pressure in order to eliminate the gap between them and improve the sealing performance. 71 is pressed.
  • the cover piece 8 embedded in the lid member 72 is reinforced by the bead portion 81, deformation of the cover piece 8 is suppressed even in a situation where a large pressure is applied to the lid member 72. . Accordingly, the relative positional accuracy between the assembled projections 82a and 82b and the movable piece 4 is improved, and the movable contact 3 is kept in a proper position and the movable piece 4 is attached with an appropriate force as described above.
  • the contact state between the movable contact 3 and the fixed contact 21 is kept good.
  • the cover piece 8 since the cover piece 8 is always in contact with the movable piece 4 at the protrusion 82 a, the elastic portion 43 of the movable piece 4 can be constantly urged toward the fixed contact 21 by the protrusion 82 a of the cover piece 8. Is stable, and the contact state between the movable contact 3 and the fixed contact 21 is kept good.
  • the resin case 7 and the cover piece 8 are integrally formed by insert molding or the like.
  • the cover piece 8 can be fixed in an accurate position and posture.
  • the precision of the cover piece 8 with respect to the resin case 7 can be improved, the movable piece 4 is regulated at a more accurate position, and is urged with an appropriate force, so that the movable contact 3 and the fixed contact 21 are in contact with each other. Is kept even better.
  • FIG. 15 shows a configuration of a breaker 1B according to a modification of the breaker 1A.
  • the breaker 1B is different from the breaker 1A in that bead portions 83a and 83b are formed so as to protrude toward the inner side of the resin case 7.
  • the recesses on the surface side of the bead parts 83a and 83b are filled with a resin material.
  • the bead portion 83a is always in contact with the surface of the movable piece 4 in the vicinity of the protrusion 44a, and is formed in a position and shape that urges the elastic portion 43 toward the fixed contact 21 side.
  • the bead portion 83b is formed in a position and shape that contacts the surface of the movable piece 4 in the vicinity of the protrusion 44b when the movable contact 3 is separated from the fixed contact 21, and restricts deformation of the movable piece 4. Accordingly, the protrusions 82a and 82b are abolished.
  • the bead portions 83a and 83b are formed to protrude toward the inner side of the resin case 7, and the bead portions 83a and 83b come into contact with the movable piece 4 to regulate or bias the movable piece 4. Since the bead portions 83a and 83b have the effect of increasing the rigidity by themselves, the movable piece 4 is regulated at an accurate position and is urged by an appropriate force so that the contact state between the movable contact 3 and the fixed contact 21 is good. Kept. Moreover, even if the projections 82a and 82b are eliminated, the same effect can be obtained. Therefore, the structure of the cover piece 8 can be simplified and the cost of the breaker 1B can be reduced.
  • the plate-shaped cover piece 8 which has the bead part 81 at least in the resin case 7 should just be shape
  • the shape, number, arrangement, and the like of the bead portion 81 can be appropriately determined according to the use required for the breaker.
  • fins, ribs, or the like may be used as the convex reinforcing portions.
  • the material of the cover piece 8 is not limited to a metal, and may be a material (for example, a carbon fiber composite material) having higher rigidity and strength than the resin constituting the lid member 72.
  • the resin case 7 is not limited to the form in which the case main body 71 and the lid member 72 are joined by ultrasonic welding, but may be a form integrally formed.
  • the movable piece 4 and the thermally responsive element 5 may be integrally formed by forming the movable piece 4 from bimetal or trimetal. In this case, it is possible to further simplify the configuration of the breaker and further reduce the size and thickness.
  • the self-holding circuit using the PTC thermistor 6 is provided.
  • the present invention can be applied to a configuration in which such a configuration is omitted, and the breaker 1 can be reduced in size while suppressing conduction resistance. Can be achieved.
  • the joining technique between the resin base 71 and the cover member 72 is not limited to ultrasonic welding, and any technique can be applied as long as both are firmly joined.
  • a liquid or gel (glue) adhesive may be applied, filled, and cured to bond them together.
  • the resin case 7 is not limited to the form constituted by the resin base 71 and the cover member 72 and the like, but may be any form as long as the movable piece 4 is sandwiched and held by two or more parts. In this case, one is the first case and the other is the second case.
  • the present invention is applied to a form in which the fixed portion 42 or the vicinity thereof is structurally separated into the terminal 41 side and the movable contact 3 side as shown in JP-A-2005-203277. Also good.
  • FIG. 16 shows the secondary battery pack 9.
  • the secondary battery pack 9 includes a secondary battery 91 and a breaker 1 provided in an output terminal circuit of the secondary battery 91.
  • FIG. 17 shows a safety circuit 90 for electrical equipment.
  • the safety circuit 90 includes the breaker 1 in series in the output circuit of the secondary battery 91.
  • the present invention includes at least a fixed piece having a fixed contact, a movable contact, a movable piece that presses the movable contact against the fixed contact, and is deformed in accordance with a temperature change.
  • a breaker comprising: a thermal response element that operates the movable piece so that the movable contact is separated from the fixed contact; and a resin case that houses the fixed piece, the movable piece, and the thermal response element.
  • the plate-shaped cover piece having the bead portion only needs to be integrally formed.
  • the resin case is integrally formed with a plate-like cover piece having a bead, so that the rigidity and strength of the resin case can be dramatically increased without increasing the thickness of the breaker. Can do.
  • the rigidity and strength are the same as those of the prior art, the thickness of the resin case and the cover piece can be reduced, and the thickness of the breaker can be reduced to achieve downsizing and thinning.
  • the movable piece when at least the outside of the cover piece where the bead portion is formed is covered with the resin case and at least the movable contact is separated from the fixed contact, the movable piece is It is preferable to be in contact with the cover piece.
  • the heat transmitted from the movable piece to the cover piece when the movable contact is separated from the fixed contact. Can be prevented by the resin case from being released to the outside of the breaker.
  • the surface area tends to increase locally, and the released heat tends to increase.
  • the present invention suppresses the release of heat from the bead part by covering the outside of the part where the bead part is formed with a resin case. Thereby, the temperature fall of a thermally responsive element can be suppressed and it can prevent that the deformation
  • the cover piece has a protrusion protruding toward the inner side of the resin case so as to be in contact with the movable piece.
  • the protrusion comes into contact with the movable piece to restrict or bias the movable piece.
  • the cover piece receives a reaction force from the protrusion, but since it is reinforced by the bead portion, the deformation of the cover piece is suppressed and the fluctuation of the position of the protrusion is suppressed.
  • the movable piece is regulated at an accurate position, and is urged by an appropriate force, so that the contact state between the movable contact and the fixed contact is kept good.
  • the bead portion is formed so as to protrude inward of the resin case so that a part of the bead portion can come into contact with the movable piece.
  • the movable piece can be regulated or urged by bringing the bead portion into contact with the movable piece.
  • the movable piece since the bead portion itself has an effect of increasing the rigidity, the movable piece is regulated at an accurate position and is urged by an appropriate force to maintain a good contact state between the movable contact point and the fixed contact point. It is.
  • the cover piece is always in contact with the movable piece at least at one place.
  • the movable piece can be constantly urged by the cover piece, so that the posture of the movable piece is stabilized.
  • the outer surface of the resin case has an opening that penetrates the resin case and exposes a part of the cover piece.
  • the cover piece is It can be fixed in an accurate position and posture.
  • the accuracy of the cover piece with respect to the resin case can be improved, the movable piece is regulated at a more accurate position, and the contact state between the movable contact point and the fixed contact point is further improved by being biased with an appropriate force. To be kept.
  • the cover piece is disposed on the inner surface of the resin case and protrudes outward.
  • the cover piece is disposed on the inner surface of the resin case, and the bead portion is formed so as to protrude outward, so that the protruded bead portion is embedded in the resin case. Or it does not protrude from the outer surface. As a result, the thickness of the breaker can be further reduced, and the size and thickness can be reduced.
  • the bead portion extends along the longitudinal direction of the resin case.
  • the bead portion extends along a specific direction.
  • the rigidity and strength in a specific direction can be increased according to the orientation of the breaker mounted on the secondary battery, etc. It is possible to maintain a stable operation while achieving shape.
  • the safety circuit for an electric device is characterized by including the breaker.
  • the secondary battery pack of the present invention is characterized by including the breaker.
  • the safety circuit or the secondary battery pack provided with the breaker of the present invention it becomes possible to easily manufacture the safety circuit or the secondary battery pack that is downsized.

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

L'invention porte sur un coupe-circuit (1), qui comprend : une pièce fixe (2) qui comporte un contact fixe (21) ; une pièce mobile (4) qui comporte un contact mobile (3), et qui presse le contact mobile (3) contre le contact fixe (21) de façon à amener le contact mobile (3) en contact avec le contact fixe (21) ; un élément actionné thermiquement (5) qui actionne la pièce mobile (4) de façon à séparer le contact mobile (3) du contact fixe (21) par déformation avec des changements de température ; et un boîtier en résine (7) qui renferme la pièce fixe (2), la pièce mobile (4) et l'élément actionné thermiquement (5). Un élément de couvercle (72) du boîtier en résine (7) est moulé d'un seul tenant avec une pièce de revêtement en forme de plaque (8) ayant des parties de nervure (81). Les parties de nervure (81) renforcent l'élément de couvercle (72), et le coupe-circuit (1) peut de plus avoir une taille et une épaisseur réduites tout en conservant un état de contact/non-contact stable entre le contact fixe (21) et le contact mobile (3).
PCT/JP2012/064270 2011-06-08 2012-06-01 Coupe-circuit, circuit de sécurité le comprenant et ensemble de batterie secondaire Ceased WO2012169442A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013519473A JP5452771B2 (ja) 2011-06-08 2012-06-01 ブレーカー及びそれを備えた安全回路並びに２次電池パック

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-128703 2011-06-08
JP2011128703 2011-06-08

Publications (1)

Publication Number Publication Date
WO2012169442A1 true WO2012169442A1 (fr) 2012-12-13

Family

ID=47296008

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/064270 Ceased WO2012169442A1 (fr) 2011-06-08 2012-06-01 Coupe-circuit, circuit de sécurité le comprenant et ensemble de batterie secondaire

Country Status (2)

Country Link
JP (1) JP5452771B2 (fr)
WO (1) WO2012169442A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014120301A (ja) * 2012-12-14 2014-06-30 Otsuka Techno Kk ブレーカ
JP2014139871A (ja) * 2013-01-21 2014-07-31 Komatsulite Mfg Co Ltd ブレーカー
WO2015148885A1 (fr) * 2014-03-27 2015-10-01 Tyco Electronics Corporation Dispositif de coupure thermique isolé
US20170179462A1 (en) 2015-12-18 2017-06-22 Bourns, Inc. Battery housing
US10985552B2 (en) 2018-06-22 2021-04-20 Bourns, Inc. Circuit breakers
CN113782386A (zh) * 2020-06-09 2021-12-10 佛山市英格尔科技有限公司 一种电池用微型热保护器
US11651922B2 (en) 2019-08-27 2023-05-16 Bourns, Inc. Connector with integrated thermal cutoff device for battery pack
US20230395342A1 (en) * 2020-11-06 2023-12-07 Dongguan Littelfuse Electronics Company Limited Smd type tco device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6703004B2 (ja) * 2015-11-20 2020-06-03 ボーンズ株式会社 電子機器筐体、電子機器筐体の製造方法及びそれを備えたブレーカー

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6122517A (ja) * 1984-07-09 1986-01-31 東光株式会社 スイツチ筐体の成形方法
JP2003297204A (ja) * 2002-03-29 2003-10-17 Furukawa Electric Co Ltd:The サーマルプロテクタ
JP2006100054A (ja) * 2004-09-29 2006-04-13 Texas Instr Japan Ltd 耐圧力性を有するバッテリープロテクタ
JP4170232B2 (ja) * 2004-01-16 2008-10-22 株式会社小松ライト製作所 バイメタルを用いた安全装置
JP2009138716A (ja) * 2007-12-10 2009-06-25 Mitsubishi Heavy Ind Ltd オイルパン構造及びこれを備えたエンジン

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6122517A (ja) * 1984-07-09 1986-01-31 東光株式会社 スイツチ筐体の成形方法
JP2003297204A (ja) * 2002-03-29 2003-10-17 Furukawa Electric Co Ltd:The サーマルプロテクタ
JP4170232B2 (ja) * 2004-01-16 2008-10-22 株式会社小松ライト製作所 バイメタルを用いた安全装置
JP2006100054A (ja) * 2004-09-29 2006-04-13 Texas Instr Japan Ltd 耐圧力性を有するバッテリープロテクタ
JP2009138716A (ja) * 2007-12-10 2009-06-25 Mitsubishi Heavy Ind Ltd オイルパン構造及びこれを備えたエンジン

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014120301A (ja) * 2012-12-14 2014-06-30 Otsuka Techno Kk ブレーカ
JP2014139871A (ja) * 2013-01-21 2014-07-31 Komatsulite Mfg Co Ltd ブレーカー
US9831054B2 (en) 2014-03-27 2017-11-28 Littelfuse, Inc. Insulated thermal cut-off device
CN106415768A (zh) * 2014-03-27 2017-02-15 保险丝公司 隔离热切断装置
JP2017510039A (ja) * 2014-03-27 2017-04-06 リテルヒューズ・インク 絶縁熱遮断装置
WO2015148885A1 (fr) * 2014-03-27 2015-10-01 Tyco Electronics Corporation Dispositif de coupure thermique isolé
US20170179462A1 (en) 2015-12-18 2017-06-22 Bourns, Inc. Battery housing
US10439196B2 (en) 2015-12-18 2019-10-08 Bourns, Inc. Electromechanical circuit breaker
US10707475B2 (en) 2015-12-18 2020-07-07 Bourns, Inc. Battery housing
US10985552B2 (en) 2018-06-22 2021-04-20 Bourns, Inc. Circuit breakers
US11651922B2 (en) 2019-08-27 2023-05-16 Bourns, Inc. Connector with integrated thermal cutoff device for battery pack
CN113782386A (zh) * 2020-06-09 2021-12-10 佛山市英格尔科技有限公司 一种电池用微型热保护器
CN113782386B (zh) * 2020-06-09 2024-05-17 佛山市英格尔科技有限公司 一种电池用微型热保护器
US20230395342A1 (en) * 2020-11-06 2023-12-07 Dongguan Littelfuse Electronics Company Limited Smd type tco device

Also Published As

Publication number Publication date
JP5452771B2 (ja) 2014-03-26
JPWO2012169442A1 (ja) 2015-02-23

Similar Documents

Publication Publication Date Title
JP5452771B2 (ja) ブレーカー及びそれを備えた安全回路並びに２次電池パック
JP5154708B2 (ja) ブレーカー及びそれを備えた二次電池
JP2014078530A (ja) ブレーカー及びそれを備えた安全回路並びに２次電池
US11329325B2 (en) Breaker and safety circuit provided with same
JP6085116B2 (ja) ブレーカー及びそれを備えた安全回路並びに２次電池
JP2013246977A (ja) ブレーカー及びそれを備えた安全回路並びに２次電池回路
JP5886600B2 (ja) ブレーカー及びブレーカーの製造方法
WO2020045144A1 (fr) Disjoncteur, circuit de sécurité et bloc-batterie secondaire
JP6047790B2 (ja) ブレーカー及びそれを備えた安全回路並びに２次電池
JP6085104B2 (ja) ブレーカー及びインサート成型品、並びにブレーカーを備えた安全回路及び２次電池パック
JP5886609B2 (ja) ブレーカー及びそれを備えた安全回路並びに２次電池パック
JP5941301B2 (ja) ブレーカー及びそれを備えた安全回路並びに２次電池
JP6393119B2 (ja) ブレーカー及びそれを備えた安全回路並びに２次電池回路。
JP5941289B2 (ja) ブレーカー
JP2017103118A (ja) ブレーカー並びにそれを備えた安全回路及び２次電池回路。
JP2015141880A (ja) 電流遮断装置
JP6401550B2 (ja) ブレーカー及びそれを備えた安全回路並びに２次電池回路。
JP6777438B2 (ja) ブレーカー及びそれを備えた安全回路並びにコネクタ。
WO2020031849A1 (fr) Disjoncteur et circuit de sécurité
CN113168991A (zh) 热响应元件、断路器、安全电路及二次电池组
JP6085107B2 (ja) ブレーカー及びそれを備えた安全回路並びに２次電池回路
JP6202923B2 (ja) ブレーカー並びにそれを備えた安全回路及び２次電池回路
JP2017208358A (ja) ブレーカー並びにそれを備えた安全回路及び２次電池回路
WO2023119887A1 (fr) Disjoncteur, circuit de sécurité et bloc-batterie secondaire
JP2013247107A (ja) ブレーカー及びそれを備えた安全回路並びに２次電池回路

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12797201

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2013519473

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12797201

Country of ref document: EP

Kind code of ref document: A1