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35results about How to "Short circuit will not" patented technology

Flat FCB (Flip Chip Bonding) GaN-based LED (Light-Emitting Diode) chip structure

The invention provides a flat FCB (Flip Chip Bonding) GaN-based LED (Light-Emitting Diode) chip structure comprising a substrate. An N-type GaN layer, a QW (Quantum Well) active area, a P-type GaN layer, a current extension level and a light-reflecting layer are sequentially arranged below the substrate from top to bottom, a stepped surface to the N-type GaN layer is etched on the light-reflecting layer, an N electrode is made on the N-type GaN layer of the stepped surface, a P electrode is made on the light-reflecting layer and arranged on the same plane with the outer end of the P electrode, a transparent insulated medium film is coated on the plane of the P electrode bonding pad and the N electrode bonding pad except the regions of P electrode bonding pad and the N electrode bonding pad, a P bonding board is made at the outer end of the P electrode bonding spot, an N bonding board is made at the outer end of the bonding point of the N electrode, and the P bonding board and the N bonding board are bonded on a P electrode area and an N electrode area of a conductive Si or SiC substrate by cocrystallization or alloy. The insulated medium film is coated outside the PN bonding pads to prevent PN from being subjected to short circuits and a limit N-area electrode conductive flat is spliced to the P area desk.
Owner:HUAWEI TEHCHNOLOGIES CO LTD

Driving controller of electric eddy current brake and control method thereof

The invention relates to a driving controller of an electric eddy current brake and a control method thereof, wherein the controller comprises a control unit, a driving circuit and an insulated gate bipolar transistor IGBT with large current and high pressure resistance electrically connected in sequence, and a rectification unit, a transformer T1 and a power input thereof connected with an IGBT output grid electrode in sequence. The control method comprises the steps that the control unit controls the pulse width thereof according to the input gear to modulate the duty ratio of the PWM output under the condition of normal circuit detection, or else turns off the output or restricts the duty ratio of the PWM output; the driving circuit receives the PWM output and drives the IGBT output according to the PWM output. The driving controller of the electric eddy current brake and the control method thereof has the high pressure resistance of 300V, and basically avoids the over-voltage failure used on cars, the controller can not be failed under various abnormal conditions combining a detection and protection circuit, thereby greatly enhancing the reliability, and solving the industrial problem of poor reliability of electronic control mode in the electric eddy current brake industry.
Owner:深圳市大为创新科技股份有限公司

High-current battery system and method for controlling a high-current battery system

The present invention relates to a high-current battery system (1) in which a high operating current flows, in particular for vehicle drives. The high-current battery system (1) has a battery system monitoring electronics unit (12) and a plurality of battery modules (4), each module including at least one rechargeable battery cell (10) and being electrically connected in series by means of an operating current line (5) such that an operating current flows through the operating current line (5) during operation. At least one of the battery modules (4) is designed as a bypass battery module (6) which comprises a bypass switch (7) and a bypass line (8), which are designed and disposed such that the battery module (6) is electrically bridged by the bypass line (8) after the bypass switch (7) is switched from a normal operating position into a bypass position, so that the operating current flows through the bypass line (8). For each bypass battery module (6), the battery system monitoring electronics unit (12) incorporates a module monitoring unit (11) which monitors the associated battery module (6) and detects a fault state of the module (6). Upon detection of a fault state of a battery module (6) by one of the module monitoring units (11), the battery system monitoring electronics unit (12) measures the current flow in the operating current line (5) and switches the bypass switch (7) of the battery module (6) in question from the normal operating position into the bypass position at a time at which the current flow in the operating current line (5) is less than a predetermined limit value.
Owner:INNOLITH ASSESTS AG

Internal short circuit triggering element, internal short circuit triggering battery and internal short circuit triggering method

The invention provides an internal short-circuit triggering element, an internal short-circuit triggering battery and an internal short-circuit triggering method. The internal short-circuit triggeringelement is characterized in that metal powder is isolated in a battery through a phase-change material before the element is not activated, so that the internal short circuit of the battery will notbe triggered; after the element is activated, the internal short circuit of the battery can be triggered through circulation, and the method is a good method for simulating the self-initiated internalshort circuit of the battery. The phase-change material does not react with the internal material of the battery, especially an electrolyte, and does not react under the action of voltage, so that the phase-change material can stably exist in the battery for a long time. The internal short-circuit trigger element occupies a small space, has small influence on normal charging and discharging and circulation of the battery, and is flexible in arrangement position. According to the internal short-circuit triggering method provided by the invention, the internal short-circuit triggering of the battery in a full life cycle can be realized, the thermoelectric characteristics of the battery can be acquired, and the internal short-circuit safety after aging of the battery can be evaluated.
Owner:TSINGHUA UNIV

Bipolar electrode, laminated battery and preparation method of laminated battery

The invention relates to a bipolar electrode, a laminated battery and a preparation method of the laminated battery, the bipolar electrode comprises a flexible conductive substrate, an insulating strip and an insulating layer, the flexible conductive substrate has a first surface and a second surface which are oppositely arranged, each of the first surface and the second surface comprises a positive electrode region, a bending region and a negative electrode region which are sequentially arranged, the positive electrode region is coated with a positive electrode active material, and the negative electrode region is coated with a negative electrode active material; the positive electrode region of the first surface is opposite to the positive electrode region of the second surface, and the negative electrode region of the first surface is opposite to the negative electrode region of the second surface; the bending region of the first surface is opposite to the bending region of the second surface; the bending region can be bent, so that the flexible conductive substrate is bent from an unfolded state to a folded state, and the folded state is that the positive electrode region and the negative electrode region are arranged oppositely; an insulating strip is arranged in the bending region; and the insulating layer is interposed between the positive electrode active material and the negative electrode active material. The bipolar electrode is simple in processing technology and low in processing cost, the energy density of the laminated battery is improved, and the service life of the laminated battery is prolonged.
Owner:深圳市睿赛新能源科技有限公司 +1

Flat FCB (Flip Chip Bonding) GaN-based LED (Light-Emitting Diode) chip structure

The invention provides a flat FCB (Flip Chip Bonding) GaN-based LED (Light-Emitting Diode) chip structure comprising a substrate. An N-type GaN layer, a QW (Quantum Well) active area, a P-type GaN layer, a current extension level and a light-reflecting layer are sequentially arranged below the substrate from top to bottom, a stepped surface to the N-type GaN layer is etched on the light-reflecting layer, an N electrode is made on the N-type GaN layer of the stepped surface, a P electrode is made on the light-reflecting layer and arranged on the same plane with the outer end of the P electrode, a transparent insulated medium film is coated on the plane of the P electrode bonding pad and the N electrode bonding pad except the regions of P electrode bonding pad and the N electrode bonding pad, a P bonding board is made at the outer end of the P electrode bonding spot, an N bonding board is made at the outer end of the bonding point of the N electrode, and the P bonding board and the N bonding board are bonded on a P electrode area and an N electrode area of a conductive Si or SiC substrate by cocrystallization or alloy. The insulated medium film is coated outside the PN bonding pads to prevent PN from being subjected to short circuits and a limit N-area electrode conductive flat is spliced to the P area desk.
Owner:HUAWEI TEHCHNOLOGIES CO LTD

Radial diffuser channel pretreatment method

The invention provides a radial diffuser channel pretreatment method. The method comprises the following steps that S21, an electrolytic machining environment is prepared; S22, a through-hole cathodeis used for carrying out vibration feeding electrolytic machining on a channel of a radial diffuser at the feeding speed of 5mm / min-6mm / min, and the channel is broken through by using a burr working section of the through-hole cathode; and S23, the through-hole cathode is used for carrying out vibration feeding electrolytic machining on the channel of at the feeding speed of 3mm / min-4mm / min, uneven allowance on the inner wall of the channel is eliminated by using an inner wall working section of the through-hole cathode. Burrs can be eliminated through the burr working section of the through-hole cathode to break through the channel, the problem that a short circuit is generated by contact between a forming cathode and burrs when the forming cathode carries out vibration feeding electrolytic machining on the channel is avoided, the uneven allowance on the inner wall of the channel can be eliminated by using the inner wall working section of the through-hole cathode, and the problem that a short circuit is generated by contact between a forming cathode and the inner wall of the channel when the forming cathode carries out vibration feeding electrolytic machining on the channel is avoided.
Owner:CHINA HANGFA SOUTH IND CO LTD

Preparation method of lithium ion battery and lithium battery thereof

A preparation method of a lithium ion battery and the lithium battery thereof. The preparation method of the lithium ion battery comprises the following steps: coating a positive electrode active material mixture on the A side of the aluminum foil, and coating an insulating layer on the B side of the aluminum foil; electroplating metal lithium On the A side of the copper foil, and the insulating layer is coated on the B side of the copper foil; the separator is arranged between the positive electrode sheet and the negative electrode sheet, and the A surface of the positive electrode sheet is opposite to the B surface of the negative electrode sheet or the negative electrode sheet The A side is arranged opposite to the B side of the positive electrode sheet; the battery pack is wound or a plurality of battery packs are stacked. The preparation method of the lithium ion battery of the present invention can improve the energy density of the battery by arranging a positive electrode sheet of a single-sided active material and a negative electrode sheet using lithium metal as the negative electrode, and at the same time, an insulating layer is arranged on the positive electrode sheet and the negative electrode sheet , so that the generated lithium dendrites can be blocked, thereby preventing the short circuit caused by the contact between the lithium dendrites and the positive electrode sheet.
Owner:EVE ENERGY CO LTD

Lithium ion battery preparation method and lithium battery thereof

The invention relates to a lithium ion battery preparation method and a lithium ion battery thereof. The lithium ion battery preparation method comprises the following steps: coating a cathode activematerial mixture on the A surface of an aluminum foil, and coating an insulating layer on the B surface of the aluminum foil; electroplating metal lithium on the surface A of the copper foil, and coating the insulating layer on the surface B of the copper foil; arranging a diaphragm between the positive plate and the negative plate, and oppositely arranging the surface A of the positive plate andthe surface B of the negative plate or oppositely arranging the surface A of the negative plate and the surface B of the positive plate; and carrying out winding operation on the battery cell groups or stacking a plurality of battery cell groups. According to the preparation method of the lithium ion battery, the positive plate with the single-sided active material and the negative plate with thelithium metal as the anode are arranged, the insulating layers are arranged on the positive plate and the negative plate, so that the generated lithium dendrites can be blocked, and the lithium dendrites are prevented from being in contact with the positive plate to cause short circuit.
Owner:EVE HYPERPOWER BATTERIES INC

A kind of preparation method of bipolar electrode, laminated battery and laminated battery

The invention relates to a bipolar electrode, a laminated battery and a method for preparing a laminated battery. The bipolar electrode includes a flexible conductive base material, an insulating strip and an insulating layer, and the flexible conductive base material has a first surface opposite to the other. and the second surface, the first surface and the second surface both include a positive electrode area, a bending area and a negative electrode area arranged in sequence, the positive electrode area is coated with a positive electrode active material, and the negative electrode area is coated with a negative electrode active material; the positive electrode on the first surface The region is opposite to the positive electrode region on the second surface, the negative electrode region on the first surface is opposite to the negative electrode region on the second surface; the bending region on the first surface is opposite to the bending region on the second surface; the bending region can be bent to The flexible conductive substrate is bent from the unfolded state to the half-folded state, and the half-folded state is that the positive electrode area and the negative electrode area are facing each other; the insulating strip is arranged in the bending area; the insulating layer is sandwiched between the positive electrode active material and the negative electrode active material. The bipolar electrode can have simple processing technology, low processing cost, and improve the energy density and service life of the laminated battery.
Owner:深圳市睿赛新能源科技有限公司 +1
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