A device for expanding channels

Abstract

The present invention discloses a device for expanding channels, which relates to the field of high-current test equipment, including a junction box, a first DC switch and a second DC switch, wherein the first DC switch and the second DC switch are both mounted on the junction box, two first diode heat sinks and two second diode heat sinks are mounted on the junction box, the two second diode heat sinks are located below the two first diode heat sinks, a first charging diode and a second charging diode are mounted on the two first diode heat sinks, respectively, the first charging diode and the second charging diode are connected to the first DC switch and the second DC switch, respectively, and a first discharge diode and a second discharge diode are mounted on the two second diode heat sinks. The present invention solves the problem of flexible addition and subtraction of test channels for high-power test equipment, thereby achieving the purpose of reducing product costs and improving test efficiency and the use value of equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of high current testing equipment, and in particular to a device for expanding a channel. Background Art

[0002] Lithium-ion battery is a secondary battery (rechargeable battery), which mainly relies on the movement of lithium ions between the positive and negative electrodes to work. During the charge and discharge process, Li+ is embedded and de-embedded between the two electrodes: when charging, Li+ is de-embedded from the positive electrode, embedded into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; when discharging, the opposite is true. With the implementation of clean energy policy planning at home and abroad, the demand for clean energy is increasing. Under the guidance and promotion of policies, the industrialization of lithium-ion batteries has rapidly increased, becoming the most widely used battery for new energy vehicles. However, in order to meet the required voltage and capacity requirements during use, the battery needs to undergo various performance tests. However, in order to make full use of high-power equipment during the test, a one-to-two channel conversion device can be used to divide it into two or more test channels.

[0003] At present, after the power battery system is assembled, the entire system needs to be fully tested for product performance to ensure good performance and excellent quality. The finished products need to be 100% tested and inspected before shipment. However, the existing test equipment models cannot meet all product test power requirements, which greatly increases the product's operating costs and reduces the product's testing efficiency. Therefore, a device that expands the channel is needed to meet people's needs. Summary of the invention

[0004] The object of the present invention is to provide a device for expanding a channel to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a device for expanding a channel, comprising a junction box, a first DC switch and a second DC switch, wherein the first DC switch and the second DC switch are both installed on the junction box, and two first diode heat sinks and two second diode heat sinks are installed on the junction box, and the two second diode heat sinks are located below the two first diode heat sinks.

[0006] Preferably, a first charging diode and a second charging diode are respectively mounted on the two first diode heat sinks, and the first charging diode and the second charging diode are respectively connected to the first DC switch and the second DC switch.

[0007] Preferably, a first discharge diode and a second discharge diode are respectively mounted on the two second diode heat sinks, and the first discharge diode and the second discharge diode are respectively connected to the first DC switch and the second DC switch.

[0008] Preferably, a first voltage detection diode and a second voltage detection diode are installed on the junction box, and the first voltage detection diode and the second voltage detection diode are connected to the first charging diode and the second charging diode respectively.

[0009] Preferably, the first voltage detection diode and the second voltage detection diode are respectively connected to a first power resistor and a second power resistor, and the first power resistor and the second power resistor are respectively connected to a first DC switch and a second DC switch.

[0010] Preferably, the first DC switch, the second DC switch, the first diode heat sink, and the second diode heat sink are all mounted on the junction box by screws.

[0011] The beneficial effects of the present invention are:

[0012] The present invention solves the problem of flexible addition and subtraction of test channels of high-power test equipment, thereby achieving the purpose of reducing product cost and improving test efficiency and use value of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the structure of a device for expanding a channel proposed by the present invention;

[0014] Figure 2 This is a schematic diagram of the electrical design of a channel expansion device proposed in the present invention.

[0015] In the figure: 1, junction box; 2, first DC switch; 3, second DC switch; 4, first diode heat sink; 5, first charging diode; 6, second charging diode; 7, second diode heat sink; 8, first discharge diode; 9, second discharge diode; 10, first voltage detection diode; 11, second voltage detection diode; 12, first power resistor; 13, second power resistor. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] Example 1

[0018] Reference Figure 1A device for expanding a channel includes a junction box 1, a first DC switch 2 and a second DC switch 3, wherein the first DC switch 2 and the second DC switch 3 are both installed on the junction box 1, and two first diode heat sinks 4 and two second diode heat sinks 7 are installed on the junction box 1, and the two second diode heat sinks 7 are located below the two first diode heat sinks 4, and the two first diode heat sinks 4 are respectively installed with a first charging diode 5 and a second charging diode 6, and the first charging diode 5 and the second charging diode 6 are respectively connected to the first DC switch 2 and the second DC switch 3, and the two second diode heat sinks 7 are respectively installed with a first discharge diode 8 and a second discharge diode 9, and the first discharge diode 8 and the second discharge diode 9 are respectively connected to the first DC switch 2 and the second DC switch 3, and the junction box 1 is installed with a first voltage detection diode 10 and a second voltage detection diode 11, and the first The voltage detection diode 10 and the second voltage detection diode 11 are respectively connected to the first charging diode 5 and the second charging diode 6, and the first voltage detection diode 10 and the second voltage detection diode 11 are respectively connected to the first power resistor 12 and the second power resistor 13, and the first power resistor 12 and the second power resistor 13 are respectively connected to the first DC switch 2 and the second DC switch 3, wherein the charging diode is connected to the PIN1 of the DC switch through a wire (1CH is connected to 1CH, and 2CH is connected to 2CH), the discharge diode is connected to the PIN2 of the DC switch through a wire (1CH is connected to 1CH, and 2CH is connected to 2CH), the voltage detection diode is connected to the charging diode in parallel with the PIN1 of the DC switch (1CH is connected to 1CH, and 2CH is connected to 2CH), and the power resistor is connected in series with the voltage detection diode, and these devices are combined to form a detection channel device for expanding the channel.

[0019] Example 2

[0020] Reference Figure 2 , 1. Connection method:

[0021] ①Discharge process connection method:

[0022] 1CH: 1# product positive pole → discharge DC switch PIN4 → discharge DC switch PIN2 → 1CH discharge diode anode → discharge diode cathode → test equipment positive pole; 1# product negative pole → equipment negative pole.

[0023] 2CH: 2# product positive pole → discharge DC switch PIN3 → discharge DC switch PIN1 → 2CH discharge diode anode → discharge diode cathode → test equipment positive pole; 2# product negative pole → equipment negative pole.

[0024] ②Charging process connection method:

[0025] 1CH: 1# product positive pole → charging DC switch PIN4 → charging DC switch PIN2 → 1CH charging diode cathode → charging diode anode → testing equipment positive pole; 1# product negative pole → equipment negative pole.

[0026] 2CH: 2# product positive pole → charging DC switch PIN3 → charging DC switch PIN1 → 2CH charging diode cathode → charging diode anode → testing equipment positive pole; 2# product negative pole → equipment negative pole.

[0027] ③Charging voltage detection connection method:

[0028] 1CH: 1# product positive pole → charging DC switch PIN4 → charging DC switch PIN2 → resistor A end → resistor B end → 1CH voltage detection diode anode → voltage detection diode cathode → test equipment positive pole; 1# product negative pole → equipment negative pole.

[0029] 2CH: 2# product positive pole → charging DC switch PIN4 → charging DC switch PIN2 → resistor A end → resistor B end → 2CH voltage detection diode anode → voltage detection diode cathode → test equipment positive pole; 2# product negative pole → equipment negative pole.

[0030] 2. Working principle:

[0031] The single channel of the test equipment is converted into two test channels through the test tooling and control components. The charging and discharging in the test tooling are controlled separately, and the charging and discharging directions are controlled according to the charging and discharging diodes. During the charging test, since the equipment needs to collect voltage to work, the voltage is output to the equipment through the current limiting resistor and diode. The equipment charges the product after detecting the voltage.

[0032] 3. Control:

[0033] ①Discharge control:

[0034] After products 1# and 2# are powered on, the discharge DC switch is closed (the charging DC switch must be disconnected when the discharge DC switch is closed), and then the energy of the two products is isolated through the discharge diode of the test tooling. Each product is a separate individual and there will be no problem of energy conversion between products. When the test starts, products 1# and 2# output power to the test equipment at the same time.

[0035] ②Charging control:

[0036] After products 1# and 2# are powered on, the charging DC switch is closed (the discharging DC switch must be disconnected when the charging DC switch is closed). The energy of the two products is then isolated through the charging diode of the test fixture. Each product is a separate individual and there will be no problem of energy conversion between products. A voltage signal is then provided to the test equipment through a voltage detection diode. When the test receives the voltage signal of the product, the test equipment can start charging the product.

[0037] 4. Function:

[0038] ① Anti-current backflow function:

[0039] The energy between products is isolated by diodes, so when there is an energy difference between products, there will be no problem of energy backflow between products.

[0040] ②Charging voltage detection and collection function:

[0041] The voltage is provided to the detection end of the test equipment through the power resistor and the voltage detection diode. The power resistor is used to limit the current flow, and the voltage collection diode is used to prevent the energy backflow between products.

[0042] ③Energy leveling function:

[0043] Through the charge and discharge diodes, the energy leveling function can be automatically performed on the products on the test channel of the same test tooling during the charge and discharge process. When the product is tested for the first time, the energies of the two products are not on the same platform. When the product is charged and discharged, the required power is certain according to the law of energy balance. The higher the energy, the greater the power output, and the smaller the energy, the smaller the power output.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for expanding a channel, comprising a junction box (1), a first DC switch (2) and a second DC switch (3), wherein the first DC switch (2) and the second DC switch (3) are both mounted on the junction box (1), characterized in that: Two first diode heat sinks (4) and two second diode heat sinks (7) are installed on the junction box (1), and the two second diode heat sinks (7) are located below the two first diode heat sinks (4); A first charging diode (5) and a second charging diode (6) are respectively mounted on the two first diode heat sinks (4); the first charging diode (5) and the second charging diode (6) are respectively connected to the first DC switch (2) and the second DC switch (3); A first discharge diode (8) and a second discharge diode (9) are respectively mounted on the two second diode heat sinks (7); the first discharge diode (8) and the second discharge diode (9) are respectively connected to the first DC switch (2) and the second DC switch (3); The junction box (1) is provided with a first voltage detection diode (10) and a second voltage detection diode (11), the first voltage detection diode (10) and the second voltage detection diode (11) being connected in parallel with the first charging diode (5) and the second charging diode (6) for detecting the voltage during the charging process; The first voltage detection diode (10) and the second voltage detection diode (11) are respectively connected in series with a first power resistor (12) and a second power resistor (13); the first power resistor (12) and the second power resistor (13) are respectively connected to the first DC switch (2) and the second DC switch (3) for limiting current and providing voltage drop, so as to protect the voltage detection diode from the influence of excessive current; The polarity configuration and connection mode of the first charging diode (5), the second charging diode (6), the first discharging diode (8) and the second discharging diode (9) ensure that the current can flow in a predetermined direction during the charging and discharging process, thereby achieving effective energy transfer and control.

2. A channel expansion device according to claim 1, characterized in that: The first DC switch (2), the second DC switch (3), the first diode heat sink (4), and the second diode heat sink (7) are all mounted on the junction box (1) by means of screws.

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