Adjustable resistor device

Abstract

The utility model relates to the technical field of battery testing, in particular to an adjustable resistor device. An adjustable resistance device comprises a to-be-tested battery assembly provided with a test shell, a current lead and a fastening rod, the test shell is provided with a first accommodating space, a to-be-tested battery is placed in the first accommodating space, the current lead is connected with the to-be-tested battery, and the current lead penetrates through the test shell and then extends out of the test shell; and the resistor assembly is provided with a resistor shell and a coil, the test shell is connected with the resistor shell through a fastening rod, the resistor shell is internally provided with a second accommodating space, the second accommodating space is suitable for placing a high-temperature superconductor, the high-temperature superconductor is suitable for being placed in a magnetic field generated by the coil, and the high-temperature superconductor is connected with a current lead. According to the utility model, the problem that the test efficiency is reduced due to the fact that resistors with different resistance values need to be externally connected during the external short-circuit test of the battery and the wiring work is repeated for many times is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery testing, in particular to an adjustable resistance device. Background Art

[0002] A battery short-circuit testing machine is an important testing device for battery short-circuit tests. It can simulate the short circuit of a battery. By simulating the short-circuit situation of the battery, the battery can be tested under extreme conditions to evaluate the safety performance of the battery. Its principle is to short-circuit the positive and negative electrodes of the battery by controlling the switching tube or relay on the circuit board to achieve the effect of simulating the battery short circuit. The existing external short-circuit test system consists of a short-circuit testing machine host + a short-circuit resistance device + a battery under test box. The above technology has two disadvantages. One is that different external short-circuit test standards for energy storage batteries have different regulations on the resistance of the external circuit during short circuit. The external circuit resistance is the resistance of the short-circuit testing machine except the battery under test. By making different regulations on it, the adjustable short-circuit state of the battery can be realized. The external resistance mentioned above is usually a special device set in the short-circuit test equipment. Since the short-circuit test usually has to withstand extremely large currents, the resistance device needs to have excellent thermal stability and conductivity. Currently, a circular graphite resistance rod is commonly used. Due to the large current that the circuit has to withstand and the characteristics of the graphite resistance rod, it can only be made into a single fixed resistance and cannot be adjusted in real time. In the existing method, different graphite resistance rods are used to make resistors with different resistance values, such as 0.1 milliohm and 1 milliohm, and they are placed in a resistance cabinet. During actual use, according to actual needs, the battery under test is connected to the lead-out terminal of 0.1 milliohm or 1 milliohm. Since the resistance of the external short-circuit test equipment cannot be adjusted in real time, when performing short-circuit tests with different external resistances, the wiring work needs to be repeated, which greatly reduces the test efficiency. Summary of the Utility Model

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defect that when performing an external short-circuit test on a battery, different resistances need to be externally connected, and the wiring work needs to be repeated many times, resulting in a reduction in test efficiency, so as to provide an adjustable resistance device.

[0004] To solve the above problems, the utility model provides an adjustable resistance device, including:

[0005] A battery under test assembly, the battery under test assembly is provided with a test housing, a current lead wire, and a fastening rod. The test housing has a first accommodation space, and a battery to be tested is adapted to be placed in the first accommodation space. The current lead wire is connected to the battery to be tested, and the current lead wire penetrates through the test housing and extends out of the test housing;

[0006] A resistor component, the resistor component is provided with a resistor housing and a coil, the test housing is connected to the resistor housing through a fastening rod, a second accommodation space is provided in the resistor housing, a high-temperature superconductor is adapted to be placed in the second accommodation space, the high-temperature superconductor is adapted to be placed in a magnetic field generated by the coil, the resistance of the high-temperature superconductor changes with the change of the magnetic field, and the high-temperature superconductor is connected to a current lead.

[0007] Optionally, the resistor component includes a resistor cover plate, a support bottom plate and a connecting rod, the resistor cover plate is adapted to the resistor housing, and the support bottom plate is fixedly connected to the resistor cover plate through the connecting rod.

[0008] Optionally, two corresponding side plates are provided on the support bottom plate, and a high-temperature superconductor is fixed between the two side plates.

[0009] Optionally, a "U"-shaped skeleton is provided between the two side plates, a coil is wound on the skeleton, the skeleton is adapted to accommodate the high-temperature superconductor therein, and the coil is adapted to generate a magnetic field on the surface of the high-temperature superconductor.

[0010] Optionally, the resistor cover plate is provided with a diversion tube and a floating rod, the diversion tube and the floating rod are respectively arranged on both sides of the high-temperature superconductor, the diversion tube is fixedly connected to the resistor cover plate, and the floating rod is slidably connected to the resistor cover plate.

[0011] Optionally, two test connection ends and a first lifting end are further provided on the resistor cover plate, the test connection end and the connecting rod are respectively arranged on both sides of the resistor cover plate, the test connection end and the first lifting end are arranged on the same side, and the test connection end is connected to the current lead.

[0012] Optionally, a fixing frame is provided in the test housing, and the positive electrode and the negative electrode of the battery to be tested are respectively fixedly connected to the fixing frame.

[0013] Optionally, a test cover plate is further included, the test cover plate is provided with a mounting hole, and a camera is provided in the mounting hole.

[0014] Optionally, a purification hole, a lead hole and a second lifting end are further provided on the test cover plate.

[0015] Optionally, the test cover plate is fixedly connected to the test housing through a fastener.

[0016] The technical solution of the present utility model has the following advantages:

[0017] 1. The adjustable resistance device provided by the present utility model, a battery assembly to be tested, is provided with a test housing, a current lead wire, and a fastening rod. The test housing has a first accommodation space, and a battery to be tested is adapted to be placed in the first accommodation space. The current lead wire is connected to the battery to be tested and extends out of the test housing after passing through the test housing; a resistance assembly, the resistance assembly is provided with a resistance housing and a coil. The test housing and the resistance housing are connected by a fastening rod. The resistance housing has a second accommodation space, and a high-temperature superconductor is adapted to be placed in the second accommodation space. The high-temperature superconductor is adapted to be placed in the magnetic field generated by the coil, and the high-temperature superconductor is connected to the current lead wire. In the specific application process, when different currents are passed through the coil, magnetic fields of different intensities will be generated. The resistance of the high-temperature superconductor is changed by magnetic fields of different intensities, so that the resistance of the high-temperature superconductor can be adjusted, that is, different resistance values can be formed by one high-temperature superconductor, which is convenient for short-circuit testing of the battery to be tested, and there is no need to repeat the wiring work many times, improving the testing efficiency.

[0018] 2. The adjustable resistance device provided by the present utility model, the resistance assembly includes a resistance cover plate, a support bottom plate, and a connecting rod. The resistance cover plate is adapted to the resistance housing. The support bottom plate is fixedly connected to the resistance cover plate through the connecting rod. The support bottom plate is fixed by the connecting rod to fix the high-temperature superconductor.

[0019] 3. The adjustable resistance device provided by the present utility model, two corresponding side plates are provided on the support bottom plate, and a high-temperature superconductor is fixed between the two side plates to fix the high-temperature superconductor through the side plates.

[0020] 4. The adjustable resistance device provided by the present utility model, a "U"-shaped skeleton is provided between the two side plates, and a coil is wound around the skeleton. The skeleton is used to accommodate the high-temperature superconductor therein, and the coil is used to generate a magnetic field on the surface of the high-temperature superconductor. Coils passing through different magnitudes of current generate magnetic fields of different intensities, taking advantage of the characteristic that the high-temperature superconductor can instantaneously generate different resistances under different external magnetic fields.

[0021] 5. The adjustable resistance device provided by the present utility model, the resistance cover plate is provided with a diversion tube and a floating rod. The diversion tube and the floating rod are respectively arranged on both sides of the high-temperature superconductor. The diversion tube is fixedly connected to the resistance cover plate, and the floating rod is slidably connected to the resistance cover plate. A cooling medium is adapted to flow into the diversion tube, and the cooling medium keeps the high-temperature superconductor at a certain temperature. The floating rod is used for on-site personnel to observe the height of the cooling medium in the resistance housing.

[0022] 6. The adjustable resistance device provided by the present utility model, two test connection terminals and a first lifting end are further provided on the resistance cover plate. The test connection terminals and the connecting rod are respectively arranged on both sides of the resistance cover plate. The test connection terminals and the first lifting end are arranged on the same side. The test connection terminals are connected to the current lead wire, and the first lifting end is convenient for lifting. The test connection terminals are used to connect the battery to be tested and the high-temperature superconductor.

[0023] 7. The adjustable resistance device provided by the present utility model has a fixing bracket provided inside the test housing. The positive and negative electrodes of the battery to be tested are respectively fixedly connected to the fixing bracket, and the fixing bracket serves to fix the battery to be tested.

[0024] 8. The adjustable resistance device provided by the present utility model further includes a test cover plate. The test cover plate is provided with a mounting hole, and a camera is provided inside the mounting hole. The camera captures images inside the test housing.

[0025] 9. The adjustable resistance device provided by the present utility model further has a purification hole, a lead hole, and a second lifting end on the test cover plate. The second lifting end serves for lifting, the lead hole facilitates the penetration of the current lead, and on-site personnel purify the space inside the test housing through the purification hole.

[0026] 10. The adjustable resistance device provided by the present utility model, the test cover plate is fixedly connected to the test housing through fasteners, realizing the fixed connection between the test cover plate and the test housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 Schematic diagram of the adjustable resistance device provided in the embodiment of the present utility model;

[0029] Figure 2 Schematic diagram of the battery component to be tested provided in the embodiment of the present utility model;

[0030] Figure 3 Schematic diagram of the test cover plate provided in the embodiment of the present utility model;

[0031] Figure 4 Schematic diagram of the test housing and the battery to be tested provided in the embodiment of the present utility model;

[0032] Figure 5 Schematic diagram of the resistance component provided in the embodiment of the present utility model;

[0033] Figure 6 Schematic diagram of the resistance housing provided in the embodiment of the present utility model;

[0034] Figure 7Schematic diagram of the connection of the resistance cover plate, support bottom plate, high-temperature superconductor, skeleton, floating rod, diversion tube and side plate provided in the embodiment of the present invention;

[0035] Figure 8 Schematic diagram of the connection of the support bottom plate, high-temperature superconductor, skeleton and side plate provided in the embodiment of the present invention.

[0036] Description of reference numerals: 1. Battery assembly to be tested; 101. Test cover plate; 1011. Purification hole; 1012. Mounting hole; 1013. Lead hole; 1014. Second hoisting end; 102. Test housing; 1021. First accommodation space; 1022. Fixed frame; 1023. First mounting portion; 2. Resistance assembly; 201. Resistance housing; 2011. Second accommodation space; 2012. Connection hole; 2013. Second mounting portion; 202. Resistance cover plate; 2021. First hoisting end; 2022. Test connection end; 203. Connecting rod; 204. Support bottom plate; 205. Floating rod; 206. Floating block; 207. Diversion tube; 208. Skeleton; 209. Side plate; 3. Tightening rod; 4. Current lead; 5. Battery to be tested; 6. High-temperature superconductor. Specific embodiments

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0039] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0041] Embodiment 1

[0042] As Figure 1 -8 shows a specific embodiment of the adjustable resistor device, including: a battery component 1 to be tested and a resistor component 2 connected by a fastening rod 3.

[0043] As Figure 2 、 Figure 3 And Figure 4 shown, the battery component 1 to be tested includes a test housing 102 and a test cover plate 101. The test housing 102 is made of explosion-proof material. Among them, the test housing 102 has a first accommodation space 1021, and a "U"-shaped fixing bracket 1022 is fixed to the bottom plate of the first accommodation space 1021. The fixing member is suitable for fixing the battery 5 to be tested, that is, the positive electrode and the negative electrode of the battery 5 to be tested are respectively fixedly connected to the fixing bracket 1022. To connect the test housing 102 and the test cover plate 101, as Figure 4 shown, the test housing 102 and the test cover plate 101 are connected by fasteners. The test housing 102 is provided with a first installation portion 1023, and the first installation portion 1023 is in a stepped shape. The test cover plate 101 extends into the first installation portion 1023 so that the end face of the test cover plate 101 is flush with the end face of the test housing 102. Specifically, the fastener is a bolt. As Figure 1 、 Figure 4 shown, it further includes two current leads 4. Among them, one current lead 4 is connected to the positive electrode of the battery 5 to be tested, and one current lead 4 is connected to the negative electrode of the battery 5 to be tested. The two current leads 4 penetrate the test housing 102 and then extend out of the test housing 102. As Figure 2 、 Figure 3 shown, the test cover plate 101 is provided with an installation hole 1012, and a camera is provided in the installation hole 1012 to capture an image inside the first accommodation space 1021. As Figure 2 、 Figure 3As shown, the test cover plate 101 is also provided with a purification hole 1011, two lead holes 1013 and two second hanging ends 1014. The purification hole 1011 is connected to the purifier pipeline, and each second hanging end 1014 is provided with a hanging hole, and the hanging hole is suitable for passing a rope. Figure 2 As shown, a fastening rod 3 is respectively provided at the four corners of the bottom of the test housing 102 .

[0044] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the resistor assembly 2 includes a resistor housing 201 and a resistor cover 202, wherein the resistor housing 201 has a second accommodating space 2011, and the resistor housing 201 is made of a heat insulating material. Figure 6 As shown, the resistor housing 201 and the resistor cover plate 202 are connected by fasteners, the resistor housing 201 is provided with a second mounting portion 2013, the second mounting portion 2013 is stepped, and the resistor cover plate 202 extends into the second mounting portion 2013 so that the resistor cover plate 202 is flush with the end surface of the resistor housing 201. Specifically, the fastener is a bolt. Figure 6 As shown, a connection hole 2012 is respectively formed at the four corners of the resistor housing 201, and the fastening rod 3 is inserted into the connection hole 2012 to fix the resistor housing 201 and the test housing 102. Figure 7 As shown, the resistor assembly 2 further includes a resistor cover plate 202, a support bottom plate 204 and a connecting rod 203. The resistor cover plate 202 is adapted to the resistor housing 201, and the support bottom plate 204 is fixedly connected to the resistor cover plate 202 via the connecting rod 203. Figure 7 , Figure 8 As shown, two corresponding side plates 209 are provided on the support base plate 204, and a high temperature superconductor 6 is fixed between the two side plates 209. Figure 7 , Figure 8 As shown, a "U"-shaped frame 208 is provided between the two side plates 209, and a coil is wound on the frame 208. The frame 208 with the coil wrapped around it is used to wrap the high-temperature superconductor 6, and the wires at both ends of the coil extend out of the resistor housing 201. Figure 7 As shown, the resistor cover 202 is provided with a flow guide tube 207 and a floating rod 205, which are respectively arranged on both sides of the high-temperature superconductor 6, the flow guide tube 207 is fixedly connected to the resistor cover 202, the floating rod 205 is slidably connected to the resistor cover 202, and the flow guide tube 207 and the floating rod 205 are arranged on the same side as the connecting rod 203, wherein the floating rod 205 has scales, and a floating block 206 is arranged at one end of the floating rod 205 away from the resistor cover 202, and the flow guide tube 207 is suitable for flowing in a cooling medium. Specifically, the cooling medium is liquid nitrogen. Figure 7As shown in the figure, two test connection terminals 2022 and a first lifting end 2021 are also provided on the resistor cover plate 202. The test connection terminal 2022 and the connecting rod 203 are respectively arranged on both sides of the resistor cover plate 202. The test connection terminal 2022 and the first lifting end 2021 are arranged on the same side, and the test connection terminal 2022 is connected to the current lead 4. It should be noted that the floating rod 205, the high-temperature superconductor 6, the connecting rod 203, the flow guide tube 207, and the skeleton 208 are all located in the second accommodation space 2011.

[0045] During the specific implementation process, before the test, by placing the battery 5 to be tested on the fixing frame 1022, connecting the current lead 4, and fixedly connecting the test cover plate 101 to the test housing 102; then fixedly connecting the resistor cover plate 202 to the resistor housing 201, and fixedly connecting the test housing 102 to the resistor housing 201 through the fastening rod 3, and connecting the current lead 4 to the test connection terminal 2022. Before the test, inject a cooling medium into the flow guide tube 207, and the floating rod 205 floats above the resistor cover plate 202. The on-site personnel observe the scale of the floating rod 205 until it reaches the preset position to ensure that the high-temperature superconductor 6 is in a superconducting state. During the test, an electric current is passed through the wire connected to the coil, and the magnetic field intensity generated by the coil wound on the skeleton 208 is adjusted. By using the characteristic that the high-temperature superconductor 6 can instantaneously generate different resistances under different external magnetic fields, the magnetic field of the magnetic field generating device is adjusted, so as to realize the real-time adjustment of the resistance value of the external circuit of the battery 5 to be tested. In order to protect the test equipment and the battery under test, preset parameters need to be set before the test. The preset parameters of the adjustable resistor device include the protection current and protection voltage of the high-temperature superconductor 6, and the preset parameters of the battery 5 to be tested include the protection current and protection voltage of the battery 5 to be tested.

[0046] Obviously, the above embodiments are only examples clearly described and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. An adjustable resistor device, characterized in that: include: A battery assembly to be tested (1), the battery assembly to be tested (1) being provided with a test housing (102), a current lead (4) and a fastening rod (3), the test housing (102) having a first accommodating space (1021), the first accommodating space (1021) being suitable for accommodating a battery to be tested (5), the current lead (4) being connected to the battery to be tested (5), and the current lead (4) passing through the test housing (102) and then extending out of the test housing (102); A resistor assembly (2), the resistor assembly (2) being provided with a resistor housing (201) and a coil, the test housing (102) being connected to the resistor housing (201) via a fastening rod (3), the resistor housing (201) having a second accommodating space (2011), the second accommodating space (2011) being suitable for accommodating a high-temperature superconductor (6), the high-temperature superconductor (6) being suitable for being placed in a magnetic field generated by the coil, and the high-temperature superconductor (6) being connected to a current lead (4).

2. The adjustable resistor device according to claim 1, characterized in that: The resistor assembly (2) comprises a resistor cover plate (202), a supporting base plate (204) and a connecting rod (203); the resistor cover plate (202) is adapted to the resistor housing (201); and the supporting base plate (204) is fixedly connected to the resistor cover plate (202) via the connecting rod (203).

3. The adjustable resistor device according to claim 2, characterized in that: Two corresponding side plates (209) are provided on the supporting bottom plate (204), and a high-temperature superconductor (6) is fixed between the two side plates (209).

4. The adjustable resistor device according to claim 3, characterized in that: A "U"-shaped frame (208) is provided between the two side plates (209), and a coil is wound around the frame (208). The frame (208) is used to accommodate the high-temperature superconductor (6) inside, and the coil is used to generate a magnetic field on the surface of the high-temperature superconductor (6).

5. The adjustable resistor device according to claim 4, characterized in that: The resistor cover plate (202) is provided with a flow guide tube (207) and a floating rod (205), the flow guide tube (207) and the floating rod (205) are respectively arranged on both sides of the high-temperature superconductor (6), the flow guide tube (207) is fixedly connected to the resistor cover plate (202), and the floating rod (205) is slidably connected to the resistor cover plate (202).

6. The adjustable resistor device according to claim 2, characterized in that: The resistor cover plate (202) is also provided with two test connection ends (2022) and a first hanging end (2021); the test connection ends (2022) and the connecting rod (203) are respectively arranged on two sides of the resistor cover plate (202); the test connection ends (2022) and the first hanging end (2021) are arranged on the same side; and the test connection ends (2022) are connected to the current lead (4).

7. The adjustable resistor device according to claim 1, characterized in that: A fixing frame (1022) is provided inside the test housing (102), and the positive electrode and the negative electrode of the battery (5) to be tested are respectively fixedly connected to the fixing frame (1022).

8. The adjustable resistor device according to claim 7, characterized in that: It also comprises a test cover plate (101), wherein the test cover plate (101) is provided with a mounting hole (1012), and a camera is provided in the mounting hole (1012).

9. The adjustable resistor device according to claim 8, characterized in that: The test cover plate (101) is also provided with a purification hole (1011), a lead hole (1013) and a second hanging end (1014).

10. The adjustable resistor device according to claim 9, characterized in that: The test cover plate (101) is fixedly connected to the test housing (102) via a fastener.

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