New energy automobile power battery consistency maintenance and detection device

Abstract

The utility model relates to the technical field of battery detection, in particular to a new energy automobile power battery consistency maintenance and detection device, which comprises an operation cabin, the operation cabin is provided with a sealed cabin door, a power supply is arranged in the operation cabin, and an operation platform is in transmission connection in the operation cabin; the detection end of the charging and discharging test mechanism is arranged in the operation cabin in a penetrating manner; the control host is in communication connection with the charging and discharging test mechanism, and the control host is used for receiving battery cell parameters measured by the BMS on the battery module. According to the utility model, the battery module is sealed in the operation cabin to simulate the operation environment, instantaneous large-current discharge is carried out on the battery module, then the BMS reads the voltage of each battery cell after the instantaneous large-current discharge of the battery module is finished, and whether the single battery cell capacities of the battery module are consistent or not is judged according to the voltage difference of each battery cell. The consistency operation condition of the battery modules can be quickly verified in groups, and the beneficial effects of improving the detection efficiency and guaranteeing the detection precision are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, and in particular to a consistency maintenance detection device for a power battery of a new energy vehicle. Background Art

[0002] The power battery of new energy vehicles is an integral unit assembled from multiple battery modules, which is used to store and provide electrical energy. A battery module is a unit assembled from multiple battery cells, which is used to provide higher voltage and capacity. A battery module is usually composed of several battery cells, connectors, a battery management system (BMS) and a casing. The consistency of each single battery cell in the battery module is directly related to the performance and life of the battery module; the existing consistency detection device can only detect the consistency of the single battery cell, and cannot quickly verify the consistency operation of the battery module in groups, resulting in low efficiency of consistency detection, and thus it is necessary to realize the rapid verification of the consistency operation of the battery module in groups.

[0003] In the prior art, for example, utility model CN207937575U is a test device for quickly detecting the self-discharge consistency of lithium-ion batteries. This patent is equipped with a heating device, which deteriorates the normal temperature environment of the battery cell self-discharge, and uses the voltage change value as a measurement standard, and cooperates with the high temperature environment to accelerate the self-discharge rate of the lithium-ion battery cell and shorten the test cycle; however, this patent can only detect the consistency of single battery cells, and cannot quickly verify the consistent operation of battery modules in groups, resulting in low consistency detection efficiency.

[0004] Therefore, how to quickly verify the consistent operation of battery modules in groups is an urgent problem to be solved in this technical field. Utility Model Content

[0005] In view of the disadvantage that the current consistency detection device can only detect the consistency of single battery cells, but cannot quickly verify the consistency operation of battery modules in groups, resulting in low consistency detection efficiency, a new energy vehicle power battery consistency maintenance detection device is provided, which can seal the battery module in an operating cabin to simulate the operating environment, discharge the battery module with a large current instantaneously, read the voltage of each battery cell after the instantaneous large current discharge of the battery module through the BMS, and judge whether the single cell capacity of the battery module is consistent according to the voltage difference of each battery cell.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0007] A new energy vehicle power battery consistency maintenance and detection device, comprising an operation cabin, the operation cabin is provided with a sealed cabin door, a power supply is provided in the operation cabin, and the power supply is used to power a BMS on a battery module;

[0008] A workbench, the workbench is drivingly connected in the work cabin;

[0009] A charge and discharge test mechanism, wherein a detection end of the charge and discharge test mechanism is disposed through the operation cabin;

[0010] A control host is connected in communication with the charge and discharge test mechanism, and is used to receive parameters of each battery cell measured by the BMS on the battery module.

[0011] As a preferred embodiment, the sealed cabin door is configured as an electric sealed cabin door, and the electric sealed cabin door is communicatively connected to the control host.

[0012] As a preferred embodiment, the operation platform is connected to the operation cabin in the following manner:

[0013] A T-shaped slide rail is arranged in the working cabin, and the working platform is slidably connected to the T-shaped slide rail. A ball screw is also arranged in the working cabin, and the ball screw is transmission-connected to the bottom end of the working platform. The ball screw is driven by a servo motor, and the servo motor is communicatively connected to the control host.

[0014] As a preferred implementation scheme, an L-shaped pallet I is further provided at the bottom end of the workbench, and an L-shaped pallet II is provided in the work cabin, and the L-shaped pallet I is engaged with the L-shaped pallet II.

[0015] As a preferred embodiment, a plurality of cutting grooves are also provided on the workbench.

[0016] As a preferred embodiment, a temperature detection sensor is also provided in the operation cabin, and the temperature detection sensor is communicatively connected to the control host.

[0017] As a preferred embodiment, the charge and discharge test mechanism includes a charge and discharge tester, a detection end of the charge and discharge tester is provided with a control switch, and the control switch is communicatively connected with the control host.

[0018] As a preferred embodiment, an electric heater is further provided in the working cabin, and the electric heater is communicatively connected to the control host.

[0019] As a preferred embodiment, a ventilation hole is opened through the working cabin, a cooling fan is connected to the ventilation hole, a sealing window is slidably connected to the inner side of the working cabin, the sealing window is driven by an electric push rod, the electric push rod is communicatively connected to the control host, and the sealing window is used to open or close the ventilation hole.

[0020] As a preferred embodiment, a robotic arm is also provided in the working cabin, and the robotic arm is communicatively connected with the control host. The robotic arm is used to connect the battery module in the working cabin with the control host, the charge and discharge test mechanism and the power supply.

[0021] By adopting the above technology, compared with the prior art, the beneficial effects of the utility model are:

[0022] The utility model seals the battery module in an operating cabin to simulate the operating environment, discharges the battery module with a large current instantaneously, and then uses the BMS to read the voltage of each battery cell after the instantaneous large current discharge of the battery module is completed. According to the voltage difference of each battery cell, it is judged whether the single cell capacity of the battery module is consistent, thereby realizing the consistent operation of the battery module in a fast group verification, which has the beneficial effects of improving the detection efficiency and ensuring the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the structure of this application;

[0025] Figure 2 This is a schematic diagram of the internal structure of the operation cabin of this application;

[0026] Figure 3 This is a schematic diagram of the workbench structure of this application;

[0027] Figure 4 This is a schematic diagram of the sealing window connection of this application;

[0028] Figure 5 This is the control host connection block diagram of this application; DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0030] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1 and 5 As shown,

[0034] A new energy vehicle power battery consistency maintenance and detection device comprises an operation cabin 1, wherein the operation cabin 1 is provided with a sealed cabin door, and a power supply is provided in the operation cabin 1, wherein the power supply is used to supply power to a BMS on a battery module;

[0035] A workbench 2, the workbench 2 is transmission-connected in the work cabin 1;

[0036] A charge and discharge test mechanism 3, wherein a detection end of the charge and discharge test mechanism 3 is disposed through the operation cabin 1;

[0037] The control host 4 is connected to the charge and discharge test mechanism 3 for communication, and is used to receive the parameters of each battery cell measured by the BMS on the battery module.

[0038] When the battery module is subjected to consistency maintenance inspection, the sealed cabin door is opened, the workbench 2 is extended out from the work cabin 1 by a transmission, and then the battery module is placed on the workbench 2, and the workbench 2 drives the battery module to move into the work cabin 1; the BMS on the battery module is powered by the power supply, and the charge and discharge test mechanism 3 is connected to the battery module, the control host 4 communicates with the BMS of the battery module, and then the sealed cabin door is closed, and the working environment of the battery module is simulated through the sealed work cabin 1; then the charge and discharge test mechanism 3 is turned on by the control host 4 to discharge the battery module with a large current instantaneously, and after closing the charge and discharge test mechanism 3, the battery module reads the voltage of each battery cell of the battery module at the set time after the instantaneous large current discharge of the battery module ends through the BMS, and the voltage difference of each battery cell is determined according to the voltage difference of each battery cell. Determine whether the cell capacities of the battery module are consistent. If the difference between the voltage of any cell and the average value is greater than the set threshold, it is determined that the cell capacities of the battery module are inconsistent. After the detection is completed, the sealed cabin door is opened, and the workbench 2 drives the battery module to move outside the work cabin 1, and then the battery modules with inconsistent cell capacities are balanced. In this technical solution, the battery module is sealed in the work cabin 1 to simulate the working environment, and the battery module is discharged with a large current instantaneously. Then, the voltage of each cell after the instantaneous large current discharge of the battery module is read through the BMS, and the cell capacities of the battery module are determined based on the voltage differences of each cell. This realizes the rapid group verification of the consistent operation of the battery module, which has the beneficial effects of improving detection efficiency and ensuring detection accuracy.

[0039] Furthermore, the sealed cabin door is configured as an electric sealed cabin door 11 , and the electric sealed cabin door 11 is communicatively connected to the control host 4 .

[0040] During the sealing test of the battery module in the working cabin 1, high temperature and toxic and harmful gases will be generated in the working cabin 1. By controlling the opening or closing of the electric sealing cabin door 11 by the control host 4, close contact between the staff and the working cabin 1 can be avoided, thereby improving the safety of the operation.

[0041] As a preferred embodiment, Figure 2 , Figure 3 As shown, the working platform 2 is connected to the working cabin 1 in a transmission manner as follows:

[0042] A T-shaped slide rail 12 is provided in the work cabin 1, and the work platform 2 is slidably connected to the T-shaped slide rail 12. A ball screw 13 is also set up in the work cabin 1, and the ball screw 13 is transmission-connected to the bottom end of the work platform 2. The ball screw 13 is driven by a servo motor 14, and the servo motor 14 is communicatively connected to the control host 4.

[0043] The workbench 2 is transmission-connected in the work cabin 1, and the battery module can be quickly and stably placed in or taken out. After the workbench 2 is extended out of the work cabin 1, a support point is required to support the workbench 2 and the battery module on the workbench 2. Therefore, a T-shaped slide rail 12 is arranged in the work cabin 1, and the workbench 2 is provided with a T-shaped slide or slider adapted to the T-shaped slide rail 12. After the workbench 2 is extended out of the work cabin 1, it is supported by the engagement between the workbench 2 and the T-shaped slide rail 12. After the ball screw 13 drives the workbench 2 through the servo motor 14, the connection between the ball screw 13 and the workbench 2 can also support the workbench 2, thereby ensuring the transmission effect while ensuring the structural strength.

[0044] Furthermore, an L-shaped cardboard I15 is provided at the bottom of the workbench 2, and an L-shaped cardboard II21 is provided in the work cabin 1, and the L-shaped cardboard I15 is engaged with the L-shaped cardboard II21. After the workbench 2 extends out of the work cabin 1, the L-shaped cardboard I15 is adapted to engage with the L-shaped cardboard II21, and the engagement of the L-shaped cardboard I15 with the L-shaped cardboard II21 strengthens the connection strength between the workbench 2 and the work cabin 1, thereby further improving the support strength of the workbench 2.

[0045] Further, such as Figure 3 As shown, the workbench 2 is also provided with a plurality of cut-in grooves 22. The upper surface of the workbench 2 is a plane, and the battery module is a rectangular parallelepiped and heavy. After the battery module is placed on the workbench 2, it is not convenient to move and adjust it. Therefore, a plurality of cut-in grooves 22 are provided on the workbench 2 to facilitate the connection between the mobile device and the battery module, thereby facilitating the movement and adjustment of the battery module.

[0046] As a preferred embodiment, a temperature detection sensor 5 is further provided in the operation cabin 1, and the temperature detection sensor 5 is communicatively connected with the control host 4. The sealed operation cabin 1 simulates the operation environment of the battery module, so that the operation temperature of the battery module can be detected by the temperature detection sensor 5 to prevent the operation temperature of the battery module from being too high.

[0047] As a preferred embodiment, the charge and discharge test mechanism 3 includes a charge and discharge tester, a detection end of the charge and discharge tester is provided with a control switch, and the control switch is communicatively connected with the control host 4 .

[0048] When the battery module is discharged with a large current instantaneously, the control switch is turned on by controlling the host 4, so that the charge and discharge tester is connected with the charge and discharge tester, and the battery module is discharged with a large current instantaneously through the charge and discharge tester. After the instantaneous large current discharge is completed, the control switch is turned off by controlling the host 4, so that the charge and discharge tester is disconnected from the charge and discharge tester. Therefore, the interference of the charge and discharge tester to the battery module can be avoided, and the accuracy of the parameters of each battery cell measured by the BMS on the battery module is guaranteed.

[0049] As a preferred embodiment, Figure 4 As shown, an electric heater 6 is also provided in the working cabin 1 , and the electric heater 6 is communicatively connected with the control host 4 .

[0050] During the actual operation of the battery module, there are various environmental temperature differences. In a high temperature environment, the voltage change value of each battery cell of the battery module is higher. Therefore, an electric heater 6 is set in the operating cabin 1 to heat the operating cabin 1 and simulate the actual operating environment of the battery module, thereby improving the accuracy and authenticity of the detection results.

[0051] As a preferred embodiment, Figure 4 As shown, a vent is provided through the working cabin 1, and a cooling fan 7 is connected to the vent. A sealing window 8 is slidably connected to the inner side of the working cabin 1, and the sealing window 8 is driven by an electric push rod 81, and the electric push rod 81 is communicatively connected to the control host 4. The sealing window 8 is used to open or close the vent.

[0052] After the battery module is inspected in the operating cabin 1, it is in a heated state. At this time, the battery cells in the battery module are unstable, and moving the battery module may cause a safety accident. However, waiting for the battery module to cool down naturally and stabilize will take a certain amount of time, which reduces the inspection efficiency. Therefore, a ventilation hole is opened through the operating cabin 1, and a cooling fan 7 and a sealing window 8 are respectively provided at the two ends of the ventilation hole. When the battery module is inspected, the electric push rod 81 pushes the sealing window 8 to close the ventilation hole, so as to ensure the sealing of the operating cabin 1 during the inspection. After the inspection is completed, the electric push rod 81 drives the sealing window 8 to retract and open, and starts the cooling fan 7 to dissipate heat in the operating cabin 1, so as to accelerate the heat dissipation efficiency of the battery module and improve the inspection efficiency.

[0053] As a preferred embodiment, a robotic arm 9 is also provided in the working cabin 1, and the robotic arm 9 is communicatively connected with the control host 4. The robotic arm 9 is used to connect the battery module in the working cabin 1 with the control host 4, the charge and discharge test mechanism 3 and the power supply.

[0054] After the workbench 2 drives the battery module to move into the work cabin 1, if a worker enters the work cabin 1 to perform connection operations, the worker and the battery module are in the same work cabin 1. At this time, if the battery module burns or explodes, it will cause harm to the worker. Therefore, a robotic arm 9 is arranged in the work cabin 1. The battery module is connected to the control host 4, the charge and discharge test mechanism 3 and the power supply in the work cabin 1 through the robotic arm 9, thereby avoiding the occurrence of safety accidents.

[0055] The above description is only a preferred embodiment of the utility model and is not intended to limit the technical solution of the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the technical solution of the utility model shall be included in the protection scope of the utility model.

Claims

1. A new energy vehicle power battery consistency maintenance and detection device, comprising an operation cabin, the operation cabin is provided with a sealed cabin door, a power supply is provided in the operation cabin, the power supply is used to power the BMS on the battery module, characterized in that: A workbench, the workbench is drivingly connected in the work cabin; A charge and discharge test mechanism, wherein a detection end of the charge and discharge test mechanism is disposed through the operation cabin; A control host is connected in communication with the charge and discharge test mechanism, and is used to receive parameters of each battery cell measured by the BMS on the battery module.

2. The new energy vehicle power battery consistency maintenance detection device according to claim 1 is characterized in that: The sealed cabin door is configured as an electric sealed cabin door, and the electric sealed cabin door is communicatively connected with the control host.

3. The new energy vehicle power battery consistency maintenance detection device according to claim 1 is characterized in that: The operation platform is connected to the operation cabin in the following manner: A T-shaped slide rail is arranged in the working cabin, and the working platform is slidably connected to the T-shaped slide rail. A ball screw is also arranged in the working cabin, and the ball screw is transmission-connected to the bottom end of the working platform. The ball screw is driven by a servo motor, and the servo motor is communicatively connected to the control host.

4. The new energy vehicle power battery consistency maintenance detection device according to claim 3 is characterized in that: An L-shaped pallet I is also provided at the bottom end of the workbench, and an L-shaped pallet II is provided in the work cabin, and the L-shaped pallet I is engaged with the L-shaped pallet II.

5. The new energy vehicle power battery consistency maintenance detection device according to claim 1 is characterized in that: The workbench is also provided with a plurality of cutting grooves.

6. The new energy vehicle power battery consistency maintenance detection device according to claim 1 is characterized in that: A temperature detection sensor is also provided in the operation cabin, and the temperature detection sensor is communicatively connected with the control host.

7. The new energy vehicle power battery consistency maintenance and detection device according to claim 1 is characterized in that: The charge and discharge test mechanism comprises a charge and discharge tester, a detection end of the charge and discharge tester is provided with a control switch, and the control switch is communicatively connected with the control host.

8. The new energy vehicle power battery consistency maintenance detection device according to claim 1 is characterized in that: An electric heater is also provided in the operation cabin, and the electric heater is communicatively connected with the control host.

9. The new energy vehicle power battery consistency maintenance and detection device according to claim 1, characterized in that: A vent is provided through the working cabin, a cooling fan is connected to the vent, a sealing window is slidably connected to the inner side of the working cabin, the sealing window is driven by an electric push rod, the electric push rod is communicatively connected to the control host, and the sealing window is used to open or close the vent.

10. The new energy vehicle power battery consistency maintenance and detection device according to claim 1, characterized in that: A robotic arm is also provided in the working cabin, and the robotic arm is communicatively connected with the control host. The robotic arm is used to connect the battery module in the working cabin with the control host, the charge and discharge test mechanism and the power supply.

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