阅读说明：本技术 一种石墨短路电阻箱 (Graphite short-circuit resistance box ) 是由 莫梁君 叶中轩 张海娟 程文彬 祝凤钰 于 2020-05-09 设计创作，主要内容包括：本发明涉及电池试验设备技术领域,尤其为一种石墨短路电阻箱,包括箱体、接线铜板、石墨电阻以及接出线铜板,所述箱体其中两个对称的侧面安装散热隔网,所述接线铜板和接出线铜板的一端位于箱体内固定,另一端贯穿散热隔网位于箱体外,所述石墨电阻的一端与接线铜板垂直固定,所述石墨电阻上套设有可沿其滑动的滑环,所述滑环与接出线铜板电性连接。本发明,采用石墨电阻,与绕线电阻相比,可以长期稳定工作,线性度好,耐高温。体积小,加工方便,可以加工成客户指定功率。配合高速轴流风机与温限系统,保证电阻在允许的温度下工作,避免温漂带来的影响。(The invention relates to the technical field of battery test equipment, in particular to a graphite short-circuit resistance box which comprises a box body, a wiring copper plate, a graphite resistor and a wire connecting copper plate, wherein two symmetrical side surfaces of the box body are provided with heat dissipation separation nets, one ends of the wiring copper plate and the wire connecting copper plate are fixedly arranged in the box body, the other ends of the wiring copper plate and the wire connecting copper plate penetrate through the heat dissipation separation nets and are positioned outside the box body, one end of the graphite resistor is vertically fixed with the wiring copper plate, a sliding ring capable of sliding along the graphite resistor is sleeved on the graphite resistor, and the sliding ring is electrically connected. The invention adopts the graphite resistor, and compared with a winding resistor, the graphite resistor can stably work for a long time, has good linearity and resists high temperature. The volume is small, the processing is convenient, and the power specified by a client can be processed. The high-speed axial fan and the temperature limit system are matched, so that the resistor is ensured to work at an allowable temperature, and the influence caused by temperature drift is avoided.)

1. The utility model provides a graphite short circuit resistance case, includes box (1), wiring copper (2), graphite resistor (3) and connects out line copper (13), its characterized in that: the side-mounting heat dissipation of two of them symmetries of box (1) separates net (8), the one end that wiring copper (2) and connect out line copper (13) is located box (1) internal fixation, and the other end runs through the heat dissipation and separates outside net (8) is located box (1), the one end and the wiring copper (2) vertical fixation of graphite resistor (3), the cover is equipped with on graphite resistor (3) can follow its gliding sliding ring, the sliding ring with connect out line copper (13) electric connection.

2. The graphite short circuit resistance box of claim 1, wherein: the air purifier is characterized by further comprising an axial flow exhaust fan (9) and a control panel (10), wherein the axial flow exhaust fan (9) is installed at the top of the box body (1), the control panel (10) is installed on the box body (1), and the axial flow exhaust fan (9) is in control connection with the control panel (10).

3. The graphite short circuit resistance box of claim 1, wherein: the slip ring comprises two groups of copper plates (4), wherein each copper plate (4) is provided with a semicircular copper block (5), and the copper plate (4) positioned above is provided with a blind hole (6) penetrating through the two copper blocks (5).

4. The graphite short circuit resistance box of claim 2, wherein: and a switch group and an alarm lamp are arranged on the control panel (10).

5. The graphite short circuit resistance box of claim 1, wherein: and a support bracket is arranged between the wiring copper plate (2) and the box body (1) as well as between the wiring copper plate (13) and the box body (1), and the support bracket is glass fiber (7) with the thickness of 25 mm.

6. The graphite short circuit resistance box of claim 1, wherein: an insulating frame (11) is arranged between the wiring copper plate (2) and the heat dissipation separation net (8) and between the wiring copper plate (13) and the heat dissipation separation net (8), and the insulating frame (11) is made of 25 mm-thick glass fibers (7).

7. The graphite short circuit resistance box of claim 1, wherein: the graphite resistor (3) adopts a round graphite resistor rod.

8. The graphite short circuit resistance box of claim 1, wherein: the bottom of the box body (1) is provided with a universal caster (12).

Technical Field

The invention relates to the technical field of battery test equipment, in particular to a graphite short-circuit resistance box.

Background

The testing parameters of the existing battery short circuit testing device comprise the testing of battery voltage, battery temperature and discharging loop current in the discharging process, and the main devices of the existing battery short circuit testing device need to use a winding resistor.

And the disadvantage of the wire-wound resistor: large volume and low resistance, mostly below 100K omega. In addition, due to structural reasons, the distributed capacitance and inductance are both large, and thus, the high-frequency inductor cannot be used in a high-frequency circuit. Because the winding resistor acts as a choke for the current, the current is not easy to pass through. The precision is low, and the stepless regulation of the high-power resistor is quite difficult; the resistor can only work below the ambient temperature of 170 ℃, and the permanent damage of the resistor can be caused after the temperature is exceeded.

Disclosure of Invention

The invention aims to provide a graphite short-circuit resistance box to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a graphite short circuit resistance case, includes box, wiring copper, graphite resistor and the copper of being qualified for the next round of competitions, the box wherein the side-mounting heat dissipation of two symmetries separates the net, the one end of wiring copper and the copper of being qualified for the next round of competitions is located the box internal fixation, and the other end runs through the heat dissipation and separates the net and be located the box external, the one end and the copper of being qualified for the next round of competitions vertical fixation of graphite resistor, the cover is equipped with on the graphite resistor can follow its gliding sliding ring, sliding ring and.

Further, the air conditioner further comprises an axial flow exhaust fan and a control panel, wherein the axial flow exhaust fan is installed at the top of the box body, the control panel is installed on the box body, and the axial flow exhaust fan is in control connection with the control panel.

Furthermore, the slip ring comprises two groups of copper plates, wherein each copper plate is provided with a semicircular copper block, and the copper plate positioned above the copper plate is provided with two copper block blind holes penetrating through the copper blocks.

Furthermore, a switch group and an alarm lamp are arranged on the control panel.

Furthermore, a support bracket is arranged between the wiring copper plate and the box body, and the support bracket is made of 25mm thick glass fiber.

Furthermore, an insulating frame is arranged between the wiring copper plate and the heat dissipation separation net, and the insulating frame is made of 25mm thick glass fibers.

Furthermore, the graphite resistor adopts a round graphite resistor rod.

Furthermore, the bottom of the box body is provided with a universal caster.

Compared with the prior art, the invention has the beneficial effects that:

1: compared with a winding resistor, the graphite resistor can stably work for a long time, has good linearity and is high-temperature resistant.

2: the volume is small, the processing is convenient, and the power specified by a client can be processed.

3: the high-speed axial fan and the temperature limit system are matched, so that the resistor is ensured to work at an allowable temperature, and the influence caused by temperature drift is avoided.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic view of the present invention with a portion of the heat dissipation spacer removed.

FIG. 3 is a schematic top view of the present invention.

FIG. 4 is a schematic diagram of the graphite resistor of the present invention sleeved on a slip ring.

FIG. 5 is a schematic diagram of the sliding of the graphite resistor sleeved on the slip ring according to the present invention.

FIG. 6 is a side view of the present invention.

FIG. 7 is an equivalent circuit diagram of the present invention.

Fig. 8 is an electrical schematic of the resistance box of the present invention.

In the figure: 1-box body, 2-wiring copper plate, 3-graphite resistor, 4-copper plate, 5-copper block, 6-blind hole, 7-glass fiber, 8-heat dissipation isolation net, 9-axial flow exhaust fan, 10-control panel, 11-insulation frame, 12-universal caster, 13-wiring copper plate and 14-slip ring screw.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper/lower end", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed/sleeved," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-8, the present invention provides a technical solution:

the utility model provides a graphite short circuit resistance case, includes box 1, wiring copper 2, graphite resistor 3 and connects out line copper 13, box 1 wherein the side-mounting heat dissipation of two symmetries separates net 8, wiring copper 2 and the one end that connects out line copper 13 are located box 1 internal fixation, and the other end runs through the heat dissipation and separates net 8 and be located outside box 1, graphite resistor 3's one end and wiring copper 2 vertical fixation, the cover is equipped with and follows its gliding sliding ring on the graphite resistor 3, sliding ring and the copper 13 electric connection that connects out the line.

The design of the graphite short-circuit resistance box circuit needs to bear the impact of large current and ensure the stability of resistance value, wherein the contact copper plate and the lead need to be made of all-copper materials with small internal resistance; the resistor is made of graphite materials, is stable and has good linearity, and the precision of the resistor can be adjusted to 0.1 milliohm.

Performance of graphite resistor 3:

1. thermal stability: aiming at the use conditions of the product in rapid heating and rapid cooling, the design is carried out to ensure the reliability of the product quality.

2. The graphite has high conductivity, can resist high temperature of more than 3000 ℃, has a melting point of 3800 ℃ and a boiling point of 4250 ℃, has plasticity and strong chemical stability, and is insoluble in acid and alkali.

3. Erosion resistance: the uniform and fine matrix design delays the erosion degree of the product.

4. Impact resistance: the product can bear extremely high thermal shock strength, so any process treatment can be carried out safely.

5. Acid resistance: obviously improves the quality of the product, has excellent performance on the aspect of acid resistance index, and greatly prolongs the service life of the product.

6. Controlling metal pollution: the strict control of the material components ensures that the product does not pollute the metal when dissolved.

7. And (3) quality stability: the manufacturing technology and the quality assurance system of the high-pressure forming method more fully ensure the stability of the quality.

The design of the graphite short-circuit resistance box structure:

1. the connection mode is as follows: the resistor is connected in series through the copper plate, so that the resistor is smaller. The wire output part adopts a slip ring mode, and stepless resistance value adjustment can be realized only by disassembling four screws and sliding the copper block.

Specifically, one end of the graphite resistor 3 is vertically fixed to the wiring copper plate 2, a slip ring capable of sliding along the graphite resistor 3 is sleeved on the graphite resistor 3, and the slip ring is electrically connected with the wiring copper plate 13. The slip ring comprises two groups of copper plates 4, wherein each copper plate 4 is provided with a semicircular copper block 5, and the copper plate 4 positioned above is provided with a blind hole 6 penetrating through the two copper blocks 5. As shown in fig. 2, 4 and 5, the graphite resistor 3 has a plurality of layers, each of which has a plurality of layers. One end of the copper plate is vertically fixed with the wiring copper plate 2 and then sheathed by two semicircular copper blocks 5, the equivalent circuit diagram of the series connection mode is shown in figure 7, and the resistor R₁I.e. equivalent to the copper connection plate 2, resistance R₂Namely, the copper plate 13 is equivalent to the wire-out copper plate and the adjustable resistor R₂Namely, the resistance value is equivalent to the graphite resistor 3, and stepless resistance value adjustment can be realized by sliding the copper blocks 5 left and right. The two copper blocks 5 are mounted by slip ring screws 14 so that the slip rings can slide along the graphite resistor 3. As shown in fig. 6, the copper block 5 is slid to change its resistance value.

2. Graphite resistance: and the circular graphite resistance rod is adopted, so that the heat dissipation area is increased, and the contact area with the copper block is increased. The precision machining and the assembly are convenient, and the adjustment of the linear resistance value is convenient. Specifically, as shown in fig. 4, the graphite resistor 3 is a circular graphite resistor rod.

3. The structure is as follows: the support supports, and the support adopts 25mm thick glass fiber (incombustible, anticorrosive, thermal-insulated, tensile strength is high, electrical insulation is good), guarantees that the resistance is insulating to ground, and multilayer graphite subassembly stacks, increases the heat dissipation space between the resistance, and the side business turn over wire. Specifically, as shown in fig. 2, a support bracket is arranged between the connection copper plate 2 and the connection copper plate 13 and the box body 1, and the support bracket is made of 25mm thick glass fiber 7. An insulating frame 11 is arranged between the wiring copper plate 2, the wiring copper plate 13 and the heat dissipation separation net 8, and the insulating frame 11 is also made of 25mm thick glass fibers 7.

4. The top of the structure is provided with a high-temperature resistant axial flow exhaust fan heat dissipation control system (an axial flow exhaust fan 9 and a control panel 10). when the surface detection temperature of the graphite resistor 3 reaches a set alarm temperature, the heat dissipation control system (the control panel 10) can automatically start the axial flow fan 9 to perform air suction and heat dissipation; when the detected temperature on the surface of the graphite resistor 3 reaches the set limit temperature, and a red light alarm is given out, the buzzer gives an alarm, and the graphite resistor is protected and an operator is reminded to pay attention to the safety of the experiment. Specifically, as shown in fig. 2 and 8, the exhaust fan device further comprises an axial flow exhaust fan 9, a control board 10 and a high-temperature sensor, a switch group and an alarm lamp are arranged on the control board 10, the axial flow exhaust fan 9 is arranged at the top of the box body 1, the control board 10 is arranged on the box body 1, the high-temperature sensor (not shown in the figure) is arranged on the surface of the box body 1 close to the graphite resistor 3, and the axial flow exhaust fan 9, the high-temperature sensor and the control board 10 are in control connection.

5: heat dissipation separates the net: the steel wire net shrouding is installed to the support left and right sides, improves heat dispersion and improves safety protection. As shown in fig. 1, two symmetrical sides of the box body 1 are provided with heat dissipation separation nets 8. The bottom of the box body 1 is provided with universal casters 12, so that the box body is convenient to move.

The invention comprises the following steps: compared with a winding resistor, the high-voltage winding resistor can stably work for a long time, has good linearity and resists high temperature; the volume is small, the processing is convenient, and the power can be processed into the power specified by a client; the high-speed axial fan and the temperature limit system are matched, so that the resistor is ensured to work at an allowable temperature, and the influence caused by temperature drift is avoided.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.