Discharging device suitable for cylindrical lithium battery

Abstract

The utility model relates to the technical field of lithium batteries, and provides a discharging device suitable for a cylindrical lithium battery, which comprises a discharging box body, a filler frame body is arranged in the discharging box body, graphite nodule particles are filled in the filler frame body, a liftable pressing plate is arranged at the upper position in the filler frame body, and the lower position in the filler frame body is provided with a pressure plate. A plurality of conductive copper bars are mounted in the filler frame body, one end of each conductive copper bar extends to the outer part of the filler frame body, and different pressures are applied to the graphite nodule particles through the pressing plate, so that the contact area between the graphite nodule particles and the conductive copper bars can be changed; the graphite nodule particles in the filler frame are pressurized by using a hydraulic machine, so that the contact area between the internal conductive copper bar and the graphite nodule particles is increased, the resistance can be reduced, and the advantage of low energy consumption is achieved; the batteries are arranged in the battery material frame, so that a large batch of battery discharging work can be processed at the same time, and the discharging efficiency is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to a discharge device suitable for cylindrical lithium batteries. Background Art

[0002] Cylindrical lithium batteries are one of the most widely used battery types in the fields of household appliances, electric vehicles, etc. With the continuous expansion and upgrading of the household appliances and automobile markets, the market share of cylindrical lithium batteries is also increasing. However, after the end of the battery's service life, the waste of resources, environmental pollution and safety hazards caused by discarded cylindrical lithium batteries have become increasingly prominent. Therefore, the recycling of cylindrical lithium batteries has gradually become one of the important issues in many countries and regions. When recycling cylindrical lithium batteries, the discharge process is a key link. During the recycling process, if the battery is not discharged, it is easy to cause safety problems such as short circuit and overcharge. At the same time, it is difficult to release the energy in the battery, which has a huge impact on the recycling efficiency. The commonly used discharge methods currently include external discharge, internal discharge and electrochemical discharge. External discharge is to discharge safely and stably through external discharge devices at the positive and negative electrodes of the battery, internal discharge is to discharge using the electrochemical reaction inside the battery, and electrochemical discharge is to discharge the battery by immersing it in a specific electrolyte.

[0003] At present, the technology for safe, environmentally friendly and efficient recycling of lithium batteries is in the exploratory stage. The traditional salt water discharge method has problems such as harsh operating environment. The discharge safety and efficiency of the discharge machine are better than the salt water discharge, but the discharge device has the technical problem of high energy consumption. Utility Model Content

[0004] The purpose of the utility model is to provide a discharge device suitable for cylindrical lithium batteries to solve the technical problem of high energy consumption of the existing discharge device mentioned in the above background technology.

[0005] The technical solution of the utility model is implemented as follows: a discharge device suitable for a cylindrical lithium battery, comprising a discharge box, a filler frame is arranged inside the discharge box, the filler frame is filled with graphite ball particles, a liftable pressure plate is provided at the upper position inside the filler frame, a plurality of conductive copper strips are installed inside the filler frame, one end of the conductive copper strip extends to the outside of the filler frame, different pressures are applied to the graphite ball particles by the pressure plate to change the contact area between the graphite ball particles and the conductive copper strip to change the resistance.

[0006] As a preferred solution of the utility model, it also includes a material rack, on which a battery material frame is provided, and the battery material frame has a plurality of battery slots for accommodating batteries, and upper and lower positions of the battery material frame are respectively provided with an upper probe plate and a lower probe plate, and the upper probe plate and the lower probe plate are connected to the conductive copper strip through wires.

[0007] As a preferred solution of the utility model, a hydraulic press is installed on the top of the discharge box, and the pressing plate is connected to the end position of the telescopic rod of the hydraulic press.

[0008] As a preferred solution of the utility model, a water tank is provided at the bottom of the discharge box body, and the water tank is connected to a cooling water pipe via a water pump, and the cooling water pipe is distributed around the packing frame body.

[0009] As a preferred solution of the present invention, a control panel is installed on the side of the discharge box.

[0010] As a preferred solution of the utility model, an indicator light and a buzzer are installed on the top of the discharge box.

[0011] As a preferred solution of the present invention, the upper probe plate and the lower probe plate are connected by a buckle.

[0012] As a preferred solution of the utility model, an induction grating is arranged on the side of the discharge box.

[0013] The utility model has the following beneficial effects:

[0014] (1) The utility model uses a hydraulic press to pressurize the graphite ball particles in the filler frame, so that the contact area between the internal conductive copper strip and the graphite ball particles is increased, the resistance can be reduced, and the energy consumption is low;

[0015] (2) The utility model arranges the batteries in a battery material frame, and makes the positive and negative electrodes of the batteries contact the probes of the upper and lower probe plates respectively, so that a large number of battery discharges can be processed at the same time, effectively improving the discharge efficiency;

[0016] (3) The utility model sets the discharge box and the battery separately, so as to minimize the influence of the heat generated by the resistor on the battery, effectively avoid the explosion accident caused by the external short circuit of the battery, and improve the safety of the battery during application and recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 A partial enlarged view of

[0019] Figure 3 For the utility model Figure 2 Side view of.

[0020] In the figure: 1. discharge box; 2. packing frame; 3. induction grating; 4. control panel; 5. water tank; 6. lower probe plate; 7. battery material frame; 8. upper probe plate; 9. material rack; 10. conductive copper strip; 11. wire; 12. pressure plate; 13. hydraulic press; 14. indicator light; 15. buzzer; 16. buckle. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] like Figure 1-3 As shown, a discharge device suitable for a cylindrical lithium battery comprises a discharge box 1, wherein a packing frame 2 is provided inside the discharge box 1, and the packing frame 2 can be installed inside the discharge box 1 by bolt connection so as to be kept fixed inside the discharge box 1, wherein the packing frame 2 is filled with graphite ball particles, and a liftable pressing plate 12 is provided at the upper position inside the packing frame 2, wherein the edge of the pressing plate 12 is clearance-matched with the inner wall of the packing frame 2, that is, the pressing plate 12 can be lifted and lowered inside the packing frame 2, thereby pressing the graphite ball particles inside the packing frame 2.

[0023] A plurality of conductive copper bars 10 are installed inside the packing frame 2. One end of the conductive copper bar 10 extends to the outside of the packing frame 2, and the conductive copper bar 10 is clamped and fastened by insulating material, that is, the insulating material is arranged at the gap between the conductive copper bar 10 and the packing frame 2 to achieve an insulating effect. The insulating material can be made of rubber, ceramic and other materials.

[0024] By applying different pressures to the graphite ball particles through the pressing plate 12, the contact area between the graphite ball particles and the conductive copper strip 10 can be changed, and then the resistance can be changed. That is, by pressing the graphite ball particles through the pressing plate 12, the density of the graphite ball particles themselves changes, thereby changing the contact area between the graphite ball particles and the conductive copper strip 10, and then changing the resistance value in the discharge circuit. In this example, when the pressure of the pressing plate 12 increases, the density of the graphite ball particles increases, the contact area between the conductive copper strip 10 and the graphite ball particles increases, and the resistance in the circuit decreases; conversely, when the pressure of the pressing plate 12 decreases, the density of the graphite ball particles decreases, the contact area between the conductive copper strip 10 and the graphite ball particles decreases, and the resistance in the circuit increases. When the resistance increases, the discharge current in the circuit can be increased, so that the discharge efficiency is improved.

[0025] Specifically, it also includes a material rack 9, on which a battery material frame 7 is provided, and the battery material frame 7 has a plurality of battery slots for accommodating batteries. The cylindrical lithium battery can be placed in the battery slot. In practice, different numbers of battery slots can be set according to needs. The upper and lower positions of the battery material frame 7 are respectively provided with an upper probe plate 8 and a lower probe plate 6. The upper probe plate 8 and the lower probe plate 6 are connected to the conductive copper strip 10 through a wire 11, wherein the upper probe plate 8 is provided with a plurality of probes, which are in contact with the positive electrode of the battery, and the lower probe plate 6 is provided with a plurality of probes, which are in contact with the negative electrode of the battery, that is, after the cylindrical lithium battery is placed in the battery slot and the upper probe plate 8 and the lower probe plate 6 are assembled, the lithium battery, the upper probe plate 8, the lower probe plate 6, the wire 11, the conductive copper strip 10, and the graphite ball particles can be connected to form a discharge circuit.

[0026] In this example, a total of 720 battery slots are arranged in 30 columns and 24 rows in the battery material frame 7, which can accommodate 18650 cylindrical lithium batteries with a total weight of 43.2 kg, and a wire 11 connects four (or more) lithium batteries in parallel for discharge.

[0027] The material rack 9 is independently arranged relative to the discharge box body 1. When the heat generated by the increase of resistance increases, it can avoid affecting the lithium battery, and can effectively avoid the explosion accident caused by battery short circuit, which is beneficial to improve the safety of lithium battery application and recycling.

[0028] Specifically, a hydraulic press 13 is installed on the top of the discharge box 1. The hydraulic press 13 is also called a hydraulic cylinder and is fixed to the top of the discharge box 1 by bolts. Its telescopic rod can pass through the top wall of the discharge box 1 and extend to the inside of the discharge box 1. More specifically, the pressing plate 12 is connected to the end position of the telescopic rod of the hydraulic press 13. The hydraulic press 13 is used as a power source to apply pressure to the pressing plate 12, thereby driving the pressing plate 12 to rise or fall, pressing the graphite ball particles inside the packing frame 2, changing the density of the graphite ball particles, and then changing the contact area between the conductive copper strip 10.

[0029] Specifically, a water tank 5 is provided at the bottom of the discharge box body 1, and the water tank 5 is connected to a cooling water pipe through a water pump. The cooling water pipe is distributed around the filling frame 2. The water inside the water tank 5 can enter the cooling water pipe under the action of the water pump, flow in the cooling water pipe and can exchange heat with the heat generated inside the filling frame 2, and then recirculate into the water tank 5, so as to achieve the purpose of cooling by adopting water circulation cooling to avoid safety accidents caused by excessive resistance temperature. In addition, the water tank 5 is also provided with a water replenishment port for adding water, a drain port for draining water, and a water level monitor for monitoring water level changes. This water tank structure and the structure and principle of water circulation cooling belong to conventional technologies in the prior art and will not be elaborated here.

[0030] Specifically, a control panel 4 is installed on the side of the discharge box 1, which is a PLC panel. The control panel 4 is mainly used to control and adjust the pressure of the hydraulic press 13 when it is working, to ensure that the pressure applied to the filling frame 2 is balanced and stable, and can also control the start and stop state of the cooling cycle of the water tank 5, as well as the indicator light 14 and the buzzer 15. At the same time, voltage detection points can be added to the probe contact positions of the upper probe plate 8 and the lower probe plate 6. After connecting to the control panel 4, the voltage change during discharge can be monitored in real time. When the monitored voltage drops below 0.5V, an alarm is given through the buzzer 15, and the three-color light prompts that the discharge is completed.

[0031] Specifically, an indicator light 14 and a buzzer 15 are installed on the top of the discharge box 1, wherein the indicator light 14 is a three-color light that can be used to indicate different working states of the device, for example, green for normal working state, yellow for standby state, and red for alarm state; the buzzer 15 can be activated when an alarm signal appears in the device and emit a sharp buzzing sound.

[0032] Specifically, the upper probe plate 8 and the lower probe plate 6 are connected by buckles 16, as shown in FIG. Figure 3 As shown, it is used to realize the rapid assembly of the upper probe plate 8 and the lower probe plate 6, which can save assembly time. The structure and principle of this buckle 16 are also conventional means in the prior art, and will not be described in detail here.

[0033] Specifically, a sensing grating 3 is disposed on the side of the discharge box 1 , and the sensing grating 3 can accurately measure the position of the pressing plate 12 moving up and down, and can feed back the data to the control panel 4 .

[0034] This discharge device suitable for cylindrical lithium batteries, when in use, places the cylindrical lithium battery in the battery slot on the battery material frame 7, places the upper probe plate 8 and the lower probe plate 6 at the upper and lower positions of the battery material frame 7 respectively, and fastens the two needle plates by means of a buckle 16 so that both ends of the battery can contact the probe plate, the conductive copper strip 10 is connected to the probe plate by means of a wire 11 to form a discharge circuit, and the water pump on the water tank 5 is started by means of a control panel 4 so that the cooling water in the water tank 5 can circulate and reduce the temperature inside the packing frame 2 during discharge, and the hydraulic press 13 is started by means of the control panel 4, so that the contact area between the graphite ball particles and the conductive copper strip 10 can be reduced by controlling the pressure of the pressure plate 12 on the graphite ball particles, thereby increasing the resistance and the discharge current, so as to improve the discharge efficiency of the lithium battery.

[0035] This discharge device can adjust the downward pressure of the pressing plate 12 by controlling the hydraulic press 13, so that the resistance value can be changed according to different actual needs to meet the discharge needs of the battery in different scenarios, that is, when rapid discharge is required, the pressure is reduced, and the heat during discharge can be absorbed by cooperating with water circulation cooling, which is highly safe. During the discharge process, multiple batteries can be evenly arranged at the same time, so that a discharge batch can process a large number of batteries, further improving the discharge efficiency.

[0036] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention, and modifications or deformations without creative labor are still within the scope of protection of the present invention.

Claims

1. A discharge device suitable for cylindrical lithium batteries, characterized in that: The invention comprises a discharge box (1), wherein a filling frame (2) is provided inside the discharge box (1), wherein the filling frame (2) is filled with graphite ball particles, and a lifting and lowering pressing plate (12) is provided at an upper position inside the filling frame (2), wherein a plurality of conductive copper strips (10) are installed inside the filling frame (2), wherein one end of the conductive copper strip (10) extends to a position outside the filling frame (2), and wherein different pressures are applied to the graphite ball particles by the pressing plate (12) to change the contact area between the graphite ball particles and the conductive copper strip (10) so as to change the resistance.

2. A discharge device suitable for cylindrical lithium batteries according to claim 1, characterized in that: It also includes a material rack (9), on which a battery material frame (7) is provided, and the battery material frame (7) has a plurality of battery slots for accommodating batteries, and an upper probe plate (8) and a lower probe plate (6) are respectively provided at the upper and lower positions of the battery material frame (7), and the upper probe plate (8) and the lower probe plate (6) are connected to the conductive copper strip (10) via a wire (11).

3. A discharge device suitable for cylindrical lithium batteries according to claim 1, characterized in that: A hydraulic press (13) is installed on the top of the discharge box (1), and the pressing plate (12) is connected to the end position of the telescopic rod of the hydraulic press (13).

4. A discharge device suitable for cylindrical lithium batteries according to claim 1, characterized in that: A water tank (5) is provided at the bottom of the discharge box body (1); the water tank (5) is connected to a cooling water pipe via a water pump; the cooling water pipe is distributed around the filler frame body (2).

5. A discharge device suitable for cylindrical lithium batteries according to claim 1, characterized in that: A control panel (4) is installed on the side of the discharge box (1).

6. A discharge device suitable for cylindrical lithium batteries according to claim 1, characterized in that: An indicator light (14) and a buzzer (15) are installed on the top of the discharge box (1).

7. A discharge device suitable for cylindrical lithium batteries according to claim 2, characterized in that: The upper probe plate (8) and the lower probe plate (6) are connected via a buckle (16).

8. A discharge device suitable for cylindrical lithium batteries according to claim 1, characterized in that: An inductive grating (3) is provided on the side of the discharge box (1).

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