CN210668248U

CN210668248U - High-voltage fuse device and control circuit

Info

Publication number: CN210668248U
Application number: CN201921242208.9U
Authority: CN
Inventors: 邓桂超
Original assignee: Dongguan Elite New Energy Co Ltd
Current assignee: Dongguan Elite New Energy Co Ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-06-02
Anticipated expiration: 2029-08-01

Abstract

The utility model provides a high-voltage fuse device, which comprises a first main body, a second main body connected with the first main body and a sensor used for controlling the high-voltage circuit switch; the first main body is provided with an induction sheet and a plurality of first connecting holes, a first connecting piece penetrates through each first connecting hole, and two ends of the induction sheet are respectively sleeved on the first connecting pieces; the second main body is provided with a plurality of second connecting holes, and a second connecting piece is embedded in each second connecting hole, wherein the two second connecting pieces are also electrically connected with the sensor and are in one-to-one correspondence with the two first connecting pieces penetrating through the sensing piece. The utility model discloses still disclose a control circuit for controlling above-mentioned high-pressure fuse device. The utility model discloses a cooperation state of first connecting piece and second connecting piece comes switching on and breaking off of control sensor, reaches the purpose of control high-voltage circuit switch, and easy operation is reliable, not only can improve the security performance of battery package, also can reduction in production cost.

Description

High-voltage fuse device and control circuit

[ technical field ] A method for producing a semiconductor device

The utility model relates to a battery technology field, specificly relate to a high-voltage fuse device and control circuit.

[ background of the invention ]

With the increasing severity of energy problems and environmental problems, the country strongly supports new energy resources, and the key technology of power batteries is becoming mature, power batteries have been widely used in electric cars, electric motorcycles, electric bicycles, solar energy, mobile communication terminal products, energy storage products and other products. The existing battery pack usually adopts a high-voltage power supply mode, so that a manual maintenance switch needs to be arranged for safety of the battery pack to disconnect a high-voltage circuit during maintenance, for example, when a fuse needs to be replaced for the battery pack, however, in the prior art, the manual maintenance switch and the fuse device are both independently arranged, and the fuse is arranged inside the battery pack, so that the fuse is difficult to replace, the manual maintenance switch switches on a high-voltage interlocking signal through the matching of a contact pin, the contact pin is easy to bend during frequent use, and the service life of the MSD is influenced.

Accordingly, there is a need for a high voltage fuse device and a control circuit to overcome the deficiencies of the prior art.

[ Utility model ] content

The utility model aims at providing a high-voltage fuse device and control circuit are used in the battery package to reach overcurrent protection's effect, can be used to the on-off control of the high-voltage circuit of battery package simultaneously, aim at reduction in production cost, convenient maintenance and improve battery fail safe nature.

In order to achieve the above object, the present invention provides a high voltage fuse device, which comprises a first main body, a second main body connected to the first main body and used for accommodating a fuse, and a sensor for controlling a high voltage circuit switch; the first main body is provided with an induction sheet and a plurality of first connecting holes, a first connecting piece penetrates through each first connecting hole, two ends of the induction sheet respectively extend into one first connecting hole and are sleeved on the corresponding first connecting piece, and two ends of the induction sheet are respectively and electrically connected with the sensor through wires; the second main body is provided with a plurality of second connecting holes in one-to-one correspondence with the first connecting holes, and a second connecting piece matched with the first connecting piece is embedded in each second connecting hole, so that the first main body is fixed on the second main body through the matching of the second connecting piece and the first connecting piece, and the induction sheet is conducted through the first connecting piece and the second connecting piece which are corresponding to each other.

In a preferred embodiment, two ends of the sensing piece are respectively provided with a connecting ring for a corresponding first connecting piece to pass through, the first connecting piece comprises a rod part capable of passing through the connecting ring and a head part formed by extending one end of the rod part, one side of the first main body, which is far away from the second main body, is provided with a plurality of connecting grooves which are coaxially arranged with the first connecting holes one by one, the sensing piece is embedded in the first main body, the two connecting rings are respectively placed in the corresponding connecting grooves, and the corresponding connecting rings are pressed in the corresponding connecting grooves through the corresponding heads after the first connecting pieces passing through the connecting rings are matched with the corresponding second connecting pieces.

In a preferred embodiment, an opening and a first mounting portion for arranging the sensing piece, the first connecting hole and the first connecting piece are arranged on one side of the first main body close to the second main body, and the second main body comprises a matching end matched with the opening, a working end far away from the matching end, and a second mounting portion located between the matching end and the working end and used for arranging the second connecting hole and the second connecting piece.

In a preferred embodiment, a sealing groove surrounding the opening is further formed in one side of the first body close to the second body, and a sealing ring used for being pressed between the first mounting portion and the second mounting portion is arranged in the sealing groove.

In a preferred embodiment, one side of the second mounting part, which is close to the first main body, is provided with a plurality of sealing rings which are coaxially arranged with the second connecting holes one by one and are used for the first connecting pieces to pass through one by one; and after the first connecting piece and the second connecting piece are locked, the sealing ring is pressed between the first installation part and the second installation part.

In a preferred embodiment, the second body is provided with a receiving hole for receiving a fuse, a pair of mounting grooves communicated with the receiving hole, and a pair of conductive members electrically connected with the fuse; the accommodating hole penetrates through the second main body along the direction from the matching end to the position close to the working end, the pair of mounting grooves are formed by sinking the end face of the matching end, one end of each conductive piece is connected with the bottom of one mounting groove, the other end of each conductive piece extends out of the working end, and the fuse comprises a working portion and a pair of connecting portions, wherein the working portion is accommodated in the accommodating hole, the connecting portions are respectively arranged at two ends of the working portion, and the connecting portions are respectively connected with the conductive pieces.

The utility model also provides a control circuit, which comprises a power supply, a first resistor, a second resistor, a third resistor, a comparator, a first input end, a second input end and a micro control unit for controlling the high-voltage circuit switch; the first end of the first resistor is connected with the power supply and the first input end, the second end of the first resistor is connected with the first end of the second resistor and the inverting input end of the comparator, and the second end of the second resistor is grounded; the first end of the third resistor is connected with the second input end, the second end of the third resistor is connected with the homodromous input end of the comparator, and the output end of the comparator is connected with the micro control unit; the first input end and the second input end are respectively and indirectly connected with two corresponding first connecting pieces through the sensor according to any one of claims 1 to 6, and the power supply provides reference voltage for the inverting input end of the comparator through the voltage division of the first resistor and the second resistor.

In a preferred embodiment, the device further comprises a first diode and a second diode; the anode of the first diode is connected with the second end of the third resistor, and the cathode of the first diode is connected with the power supply; the anode of the second diode is grounded, and the cathode of the second diode is connected with the second end of the third resistor.

In a preferred embodiment, the device further comprises a fourth resistor and a capacitor; and the first end of the fourth resistor is connected with the output end of the comparator, and the second end of the fourth resistor is connected with the micro control unit. The first end of the capacitor is connected with the micro control unit, and the second end of the capacitor is grounded.

In a preferred embodiment, the power supply further comprises a fifth resistor and a third diode; the first end of the fifth resistor is connected with the homodromous input end of the comparator, and the second end of the fifth resistor is connected with the output end of the comparator; and the anode of the third diode is connected with the micro control unit, and the cathode of the third diode is connected with the output end of the comparator.

Compared with the prior art, the utility model provides a high-voltage fuse device and control circuit's beneficial effect lies in: the on-off of the sensor is controlled through the matching state of the first connecting piece and the second connecting piece, so that the purpose of controlling the high-voltage circuit switch is achieved, the operation is simple and reliable, the structure is simple, the production is facilitated, the safety performance of the battery pack can be improved, and the production cost can be reduced.

[ description of the drawings ]

Fig. 1 is an exploded perspective view of a high-voltage fuse device according to the present invention;

FIG. 2 is a perspective view of the first body shown in FIG. 1;

FIG. 3 is a perspective view of the second body shown in FIG. 1;

FIG. 4 is a cross-sectional view of the high voltage fuse device of FIG. 1;

FIG. 5 is a perspective view of the first body of FIG. 1 at another angle;

fig. 6 is a schematic diagram of a control circuit provided by the present invention.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration only and not by way of limitation.

Referring to fig. 1 to 5, the present invention provides a high voltage fuse device 100, which is installed on a battery box of a battery pack for overcurrent protection and controlling a high voltage circuit of the battery pack, and plays a role in protecting the battery pack.

In an embodiment of the present invention, the high voltage fuse device 100 includes a first body 10, a second body 30 connected to the first body 10 and configured to house a fuse 20, and a sensor 40 configured to control a high voltage circuit switch.

Specifically, the first body 10 is provided with a plurality of first connecting holes 101 and an induction sheet 102, a first connecting piece 103 penetrates through each first connecting hole 101, and two ends of the induction sheet 102 respectively extend into one first connecting hole 101 and are sleeved on the corresponding first connecting piece 103; the second body 30 is provided with a plurality of second connecting holes 301 corresponding to the first connecting holes 101 one by one, each second connecting hole 301 is embedded with a second connecting piece 302 matched with the first connecting piece 103, wherein the two second connecting pieces 302 are also electrically connected with the sensor 40 and are in one-to-one correspondence with the two first connecting pieces 103 penetrating through the sensing piece 102, so that the first body 10 can be fixed on the second body 30 through the matching of the second connecting pieces 302 and the first connecting pieces 103, and the sensing piece 102 can conduct the sensor 40 through the corresponding first connecting pieces 103 and the second connecting pieces 302.

It can be understood that the utility model provides a high-voltage fuse device 100 controls switching on and breaking off of sensor 40 through the cooperation state that corresponds first connecting piece 103 and corresponds second connecting piece 302 to reach the purpose of control high-voltage circuit switch, easy operation is reliable, and simple structure does benefit to production, not only can improve the security performance of battery package, also can reduction in production cost.

Further, in an embodiment, two ends of the sensing piece 102 are respectively provided with a connection ring 1021 for passing the corresponding first connection member 103, the first connection member 103 includes a rod portion 1031 capable of passing through the connection ring 1021 and a head portion 1032 formed by extending from one end of the rod portion 1031, one side of the first body 10 facing away from the second body 30 is provided with two connection grooves 104 for placing the connection ring 1021 and coaxially arranged with the corresponding first connection hole 101, wherein after the first connection member 103 passing through the connection ring 1021 is matched with the corresponding second connection member 302, the corresponding connection ring 1021 is pressed in the corresponding connection groove 104 through the corresponding head portion 1032 to conduct the sensor 40, otherwise, the head portion 1032 of the first connection member 103 can be separated from the corresponding connection ring 1021 to break the sensor 40 by releasing any one of the first connection members 103 passing through the connection ring 1021, so that the purpose of breaking the sensor 40 can be achieved, and thus the matching state of the corresponding first connection member 103 and the corresponding second connection member 302 can be used to control the sensor 40 And conducting and disconnecting. In this embodiment, the first connecting element 103 and the second connecting element 302 are screws and nuts that can be engaged with each other and can conduct electricity, respectively, and the sensing piece 102 is embedded inside the first body 10, and then the two connecting rings 1021 are placed in the corresponding connecting slots 104, respectively.

Further, in an embodiment, an opening 11 and a first mounting portion 12 for arranging the sensing piece 102 and the first connecting hole 101 and the first connecting member 103 are disposed on one side of the first body 10 close to the second body 30, and the second body 30 includes a mating end 31 mated with the opening 11, a working end 32 far away from the mating end 31, and a second mounting portion 33 located between the mating end 31 and the working end 32 and used for arranging the second connecting hole 301 and the second connecting member 302, it can be understood that when the first body 10 is connected with the second body 30, the first connecting hole 101 can be positioned by the mating end 31 being matched with the opening 11, so that the first connecting hole 101 and the second connecting hole 301 can be in one-to-one correspondence, thereby facilitating locking the first connecting member 103 and the second connecting member 302, effectively shortening assembly time, further improving assembly efficiency and reducing assembly cost.

Preferably, a sealing groove 105 surrounding the opening 11 is further formed on one side of the first body 10 close to the second body 30, and a sealing ring 106 for pressing between the first mounting portion 12 and the second mounting portion 33 is disposed in the sealing groove 105, so that the sealing performance can be improved after the first body 10 and the second body 30 are connected. In the present embodiment, the first connection hole 101 is provided outside the seal groove 105 to reduce the size of the seal ring 106, so that the cost can be reduced.

Preferably, one side of the second mounting portion 33 close to the first body 10 is provided with a plurality of sealing rings 303 which are coaxially arranged with the second connecting holes 301 one by one and allow the first connecting members 103 to pass through one by one, and it can be understood that after the first connecting members 103 and the second connecting members 302 are locked, the sealing rings 303 are pressed between the first mounting portion 12 and the second mounting portion 33, so that the connection tightness between the first body 10 and the second body 30 can be further improved.

Further, in one embodiment, the second body 30 is provided with a receiving hole 304 for receiving the fuse 20, a pair of mounting grooves 305 communicating with the receiving hole 304, and a pair of conductive members 306 electrically connected to the fuse 20. Specifically, the receiving hole 304 penetrates the second body 30 in a direction from the mating end 31 to a position close to the working end 32, a pair of mounting grooves 305 are formed by recessing from an end surface of the mating end 31, one end of each conductive member 306 is connected to a bottom of one of the mounting grooves 305 for connecting the fuse 20, and the other end thereof protrudes out of the working end 32 for connecting the battery pack, the fuse 20 includes a working portion 201 received in the receiving hole 304 and a pair of connecting portions 202 respectively disposed at two ends of the working portion 201 and respectively connected to one of the conductive members 306.

In this embodiment, the conductive member 306 includes a fixing section 3061 and a connecting section 3062 detachably connected to the fixing section 3061, wherein the fixing section 3061 is disposed in the receiving hole 304 for connecting the fuse 20, and the connecting section 3062 is disposed outside the receiving hole 304 for connecting the battery pack. Specifically, the fixing section 3061 includes a first section 3063 connected to the bottom of the corresponding mounting groove 305, a second section 3064 connected to the end surface of the working end 32, and a third section 3065 connected between the first section 3063 and the second section 3064 and connected to the inner wall of the accommodating hole 304, so that the conductive member 306 and the fuse 20 can be fixed on the second main body 30 together by passing through the connecting portion 202 of the wiring section 3062, the second section 3064, the second main body 30, the first section 3063 and the fuse 20 in sequence through bolts, and the conductive member 306 and the fuse 20 are electrically connected, the fixing effect is stable, and the reliability of the electrical connection can be effectively guaranteed.

Referring to fig. 6, the present invention further provides a control circuit 200, the control circuit 200 is used for controlling the high voltage fuse device 100, in the embodiment of the present invention, the control circuit 200 includes a power VCC, a first resistor R1, a second resistor R2, a third resistor R3, a comparator U1, a first input CN1, a second input CN2, and a MCU for controlling the high voltage circuit switch.

A first terminal of the first resistor R1 is connected to the power source VCC and the first input terminal CN1, and a second terminal of the first resistor R1 is connected to a first terminal of the second resistor R2 and the inverting input terminal of the comparator U1. The second terminal of the second resistor R2 is connected to ground. A first terminal of the third resistor R3 is connected to the second input terminal CN2, and a second terminal of the third resistor R3 is connected to the non-inverting input terminal of the comparator U1. The output of the comparator U1 is connected to the micro control unit MCU.

The first input end CN1 and the second input end CN2 are indirectly connected to the two corresponding first connecting pieces 103 through the sensor 40 provided by the high voltage fuse device 100, the power VCC provides the reference voltage Vref for the inverting input end of the comparator U1 through the voltage division of the first resistor R1 and the second resistor R2, when the two first connecting pieces 103 are locked, the first input end CN1 and the second input end CN2 are short-circuited through the sensing piece 102 provided by the high voltage fuse device 100, the voltage of the homodromous input end of the comparator U1 is greater than that of the inverting input end, the output end of the comparator U1 outputs a high level to the MCU, and at this time, the high voltage circuit is turned on and the battery pack works normally. When the first connecting piece 103 corresponding to any one of the sensing pieces 102 is released, the first input end CN1 is disconnected from the second input end CN2, the voltage of the equidirectional input end of the comparator U1 is smaller than that of the reversed-phase input end, the output end of the comparator U1 outputs a low level to the micro control unit MCU, and the micro control unit MCU directly locks the control circuit 200 and disconnects the high-voltage circuit.

Further, in one embodiment, the control circuit 200 further includes a first diode D1 and a second diode D2. An anode of the first diode D1 is connected to the second terminal of the third resistor R3, and a cathode of the first diode D1 is connected to the power source VCC. The first diode D1 is used to clamp the input voltage at the non-inverting input of the comparator U1. The anode of the second diode D2 is grounded, and the cathode of the second diode D2 is connected to the second terminal of the third resistor R3. The second diode D2 is used to regulate the input voltage of the comparator U1.

Further, in one embodiment, the control circuit 200 further includes a fourth resistor R4 and a capacitor C1. A first end of the fourth resistor R4 is connected to the output terminal of the comparator U1, and a second end of the fourth resistor R4 is connected to the MCU. The first end of the capacitor C1 is connected with the MCU, and the second end of the capacitor C1 is grounded. The fourth resistor R4 and the capacitor C1 form a filter for filtering the output signal of the comparator U1.

Further, in one embodiment, the control circuit 200 further includes a fifth resistor R5 and a third diode D3. The first end of the fifth resistor R5 is connected to the non-inverting input terminal of the comparator U1, and the second end of the fifth resistor R5 is connected to the output terminal of the comparator U1, so as to achieve the purpose of shunting. The anode of the third diode D3 is connected to the MCU, and the cathode of the third diode D3 is connected to the output of the comparator U1. For fast bleeding of voltage.

The utility model provides a high-voltage fuse device and control circuit, battery package fuse 20 installs outside the battery package box to have the function of taking high-voltage interlocking, it is simple and convenient to assemble compared with the prior art, saved assembly and reprocessed man-hour, practiced thrift the cost; the fuse 20 can be repeatedly disassembled, so that the service life is prolonged; and the high-voltage interlocking function is assembled, so that the safety and reliability of the battery pack are improved.

The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims

1. A high voltage fuse device, characterized by: the high-voltage circuit breaker comprises a first main body, a second main body which is connected with the first main body and is used for accommodating a fuse and a sensor which is used for controlling a high-voltage circuit to be switched on and off; the first main body is provided with a plurality of first connecting holes and an induction sheet, a first connecting piece penetrates through each first connecting hole, and two ends of each induction sheet respectively extend into one first connecting hole and are sleeved on the corresponding first connecting piece; the second main body is provided with a plurality of second connecting holes which are in one-to-one correspondence with the first connecting holes, and each second connecting hole is embedded with a second connecting piece which is matched with the first connecting piece, wherein the two second connecting pieces are also electrically connected with the sensor and are in one-to-one correspondence with the two first connecting pieces which penetrate through the induction sheet; the first main body is fixed on the second main body through the matching of the second connecting piece and the first connecting piece, and the sensor is conducted through the corresponding first connecting piece and the second connecting piece by the sensing piece.

2. A high voltage fuse device as claimed in claim 1, wherein: the two ends of the induction sheet are respectively provided with a connecting ring for the first connecting piece to pass through, the first connecting piece comprises a rod part capable of passing through the connecting ring and a head part formed by extending one end of the rod part, one side of the first main body departing from the second main body is further provided with two connecting grooves which are used for placing the connecting ring and are coaxially arranged with the corresponding first connecting holes, and the first connecting piece passing through the connecting ring is matched with the corresponding second connecting piece and then presses the corresponding connecting ring in the corresponding connecting groove through the corresponding head part.

3. A high voltage fuse device as claimed in claim 1, wherein: the first main part is close to one side of second main part is equipped with the opening and is used for setting up the response piece first connecting hole with the first installation department of first connecting piece, the second main part include with opening complex cooperation end, keep away from the work end of cooperation end and be located between the cooperation end with the work end and be used for setting up the second connecting hole with the second installation department of second connecting piece.

4. A high voltage fuse device as claimed in claim 3, wherein: the first main part is close to one side of second main part has still seted up and has encircleed open-ended seal groove, be equipped with in the seal groove and be used for pressing first installation department with the sealing washer between the second installation department.

5. A high voltage fuse device as claimed in claim 4, wherein: one side of the second mounting part, which is close to the first main body, is provided with a plurality of sealing rings which are coaxially arranged with the second connecting holes one by one and are used for the first connecting pieces to penetrate through; and after the first connecting piece and the second connecting piece are locked, the sealing ring is pressed between the first installation part and the second installation part.

6. A high voltage fuse device as claimed in claim 3, wherein: the second main body is provided with an accommodating hole for accommodating a fuse, a pair of mounting grooves communicated with the accommodating hole and a pair of conductive pieces electrically connected with the fuse; the accommodating hole penetrates through the second main body along the direction from the matching end to the position close to the working end, the pair of mounting grooves are formed by sinking the end face of the matching end, one end of each conductive piece is connected with the bottom of one mounting groove, the other end of each conductive piece extends out of the working end, and the fuse comprises a working portion and a pair of connecting portions, wherein the working portion is accommodated in the accommodating hole, the connecting portions are respectively arranged at two ends of the working portion, and the connecting portions are respectively connected with the conductive pieces.

7. A control circuit, characterized by: the circuit comprises a power supply, a first resistor, a second resistor, a third resistor, a comparator, a first input end, a second input end and a micro control unit for controlling the on and off of a high-voltage circuit; the first end of the first resistor is connected with the power supply and the first input end, the second end of the first resistor is connected with the first end of the second resistor and the inverting input end of the comparator, and the second end of the second resistor is grounded; the first end of the third resistor is connected with the second input end, the second end of the third resistor is connected with the homodromous input end of the comparator, and the output end of the comparator is connected with the micro control unit; the first input terminal and the second input terminal are respectively and indirectly connected with two corresponding first connecting pieces through the sensor in the high-voltage fuse device as claimed in any one of claims 1 to 6, and the power supply provides reference voltage for the inverting input terminal of the comparator through the voltage division of the first resistor and the second resistor.

8. The control circuit of claim 7, wherein: the LED further comprises a first diode and a second diode; the anode of the first diode is connected with the second end of the third resistor, and the cathode of the first diode is connected with the power supply; the anode of the second diode is grounded, and the cathode of the second diode is connected with the second end of the third resistor.

9. The control circuit of claim 8, wherein: the circuit also comprises a fourth resistor and a capacitor; the first end of the fourth resistor is connected with the output end of the comparator, and the second end of the fourth resistor is connected with the micro control unit; the first end of the capacitor is connected with the micro control unit, and the second end of the capacitor is grounded.

10. The control circuit of claim 9, wherein: the circuit also comprises a fifth resistor and a third diode; the first end of the fifth resistor is connected with the homodromous input end of the comparator, and the second end of the fifth resistor is connected with the output end of the comparator; and the anode of the third diode is connected with the micro control unit, and the cathode of the third diode is connected with the output end of the comparator.