Lithium battery temperature control system, operation machine and battery temperature control method

Abstract

The invention relates to the field of operation machinery, and discloses a lithium battery temperature control system, operation machinery and a battery temperature control method.The lithium battery temperature control system comprises a temperature control box, a refrigerating device, a temperature measuring device and a controller, the temperature control box is provided with an air inlet and an air outlet which are communicated with the interior, and the refrigerating device is connected with the air inlet; the temperature measuring device is arranged in the temperature control box and used for feeding cold air into the temperature control box through the air inlet, the temperature measuring device is used for detecting the internal temperature of the temperature control box, and the controller is in communication connection with the temperature measuring device and the refrigerating device and used for controlling the refrigerating device according to the detection result of the temperature measuring device. The lithium battery temperature control system can ensure that the internal temperature of the temperature control box is maintained in a proper temperature range, that is, the temperature of the lithium battery is maintained in the proper temperature range, and the reliability of normal working of the lithium battery in a high-temperature environment can be effectively improved.

Description

Technical Field

[0001] The present invention belongs to the field of operating machinery, and in particular, relates to a lithium battery temperature control system, an operating machinery and a battery temperature control method. Background Art

[0002] Some existing working machines, such as super-large excavators, are equipped with lithium batteries, which are used to store excess power from the generator and to power the cooling system of the cab when the generator is insufficient or shut down. Lithium batteries are generally installed at the bottom of the cab. In a high temperature environment, the bottom temperature of the cab is high, which can easily lead to a high temperature of the lithium battery and make it unable to work normally. In other words, the reliability of lithium batteries working normally in a high temperature environment is poor. Summary of the invention

[0003] In view of the above-mentioned deficiencies or defects in the prior art, the present invention provides a lithium battery temperature control system, an operating machine and a battery temperature control method, aiming to solve the technical problem that the lithium battery of the operating machine may not work normally in a high temperature environment and has poor reliability.

[0004] To achieve the above object, the present invention provides a lithium battery temperature control system, the lithium battery temperature control system comprising:

[0005] The temperature control box is provided with an air inlet and an air outlet respectively connected to the interior;

[0006] A refrigeration device connected to the air inlet and used to supply cold air into the interior of the temperature control box through the air inlet;

[0007] A temperature measuring device, used to detect the internal temperature of the temperature control box;

[0008] The controller is respectively connected to the temperature measuring device and the refrigeration device for communication, and is used to control the refrigeration device according to the detection result of the temperature measuring device.

[0009] Optionally, the temperature measuring device comprises:

[0010] A first temperature sensor is provided on the temperature control box and is used to detect the air inlet temperature of the temperature control box;

[0011] The second temperature sensor is arranged on the temperature control box and is used to detect the air outlet temperature of the temperature control box.

[0012] The present invention also provides a battery temperature control method, which is applied to a lithium battery temperature control system, wherein the lithium battery temperature control system comprises a temperature control box and a refrigeration device, wherein the temperature control box cover is arranged on the outside of the lithium battery, and the air inlet of the temperature control box is connected to the refrigeration device;

[0013] The battery temperature control method comprises:

[0014] Detecting the internal temperature of the temperature control box;

[0015] When it is determined that the internal temperature of the temperature control box is higher than the preset temperature, the air volume level of the refrigeration device is adjusted until it is determined that the internal temperature of the temperature control box is lower than or equal to the preset temperature, and the refrigeration device is controlled to maintain operation at the current air volume level.

[0016] Optionally, the adjusting the air volume level of the refrigeration device until it is determined that the internal temperature of the temperature control box is lower than or equal to the preset temperature, and controlling the refrigeration device to maintain operation at the current air volume level, comprises:

[0017] Controlling the refrigeration device to increase the air volume by one level and operate for a first preset time period;

[0018] Under the condition that the refrigeration device is controlled to increase the air volume by one level and operate for the first preset time period, detecting the internal temperature of the temperature control box;

[0019] If the internal temperature of the temperature control box is higher than the preset temperature, return to the step of: controlling the refrigeration device to increase the air volume by one level and operate for a first preset time;

[0020] Until the internal temperature of the temperature control box is lower than or equal to the preset temperature.

[0021] Optionally, the adjusting the air volume level of the refrigeration device until it is determined that the internal temperature of the temperature control box is lower than or equal to the preset temperature, and controlling the refrigeration device to maintain operation at the current air volume level, comprises:

[0022] Controlling the refrigeration device to operate for a first preset time period;

[0023] When the refrigeration device is controlled to operate for the first preset time, the refrigeration device is controlled to increase the air volume by one level;

[0024] Detecting the internal temperature of the temperature control box;

[0025] If the internal temperature of the temperature control box is higher than the preset temperature, return to step: controlling the refrigeration device to operate for a first preset time period;

[0026] Until the internal temperature of the temperature control box is lower than or equal to the preset temperature.

[0027] Optionally, after adjusting the air volume level of the refrigeration device, the battery temperature control method further includes:

[0028] When the refrigeration device is at a highest air volume level, the refrigeration device is controlled to keep operating at the highest air volume level.

[0029] Optionally, the battery temperature control method further includes:

[0030] When the refrigeration device is in operation at the highest air volume for a second preset time, if the internal temperature of the temperature control box is higher than a preset temperature, an alarm signal is issued.

[0031] Optionally, detecting the internal temperature of the temperature control box includes:

[0032] Detecting the air inlet temperature and the air outlet temperature of the temperature control box;

[0033] The average value of the air inlet temperature and the air outlet temperature is determined as the internal temperature of the temperature control box.

[0034] The present invention also provides a machine-readable storage medium, on which instructions are stored, and the instructions are used to enable a machine to execute the above-mentioned battery temperature control method.

[0035] The present invention also provides an operating machine, which includes the above-mentioned lithium battery temperature control system, or implements the above-mentioned battery temperature control method.

[0036] Through the above technical scheme, the temperature control box cover is arranged on the outside of the lithium battery, and the refrigeration device sends cold air into the interior of the temperature control box. The cold air absorbs the heat of the lithium battery and is discharged from the air outlet. In this way, the purpose of cooling the lithium battery can be achieved. In addition, the refrigeration device is controlled according to the internal temperature of the temperature control box. In this way, the internal temperature of the temperature control box can be maintained within a suitable temperature range, that is, the temperature of the lithium battery is maintained within a suitable temperature range, which can effectively improve the reliability of the normal operation of the lithium battery in a high temperature environment.

[0037] Other features and advantages of the present invention will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention.

[0039] In the attached picture:

[0040] Figure 1 is a block diagram of a lithium battery temperature control system in an embodiment of the present invention;

[0041] Figure 2 is a working flow chart of a battery temperature control method in an embodiment of the present invention;

[0042] Figure 3 It is a structural schematic diagram of a temperature control box in an embodiment of the present invention;

[0043] Figure 4 The present invention is a flowchart of a specific application of a battery temperature control method in an embodiment of the present invention.

[0044] Description of reference numerals:

[0045] 1 Temperature control box

[0046] 11 Air inlet 12 Air outlet

[0047] 2 Refrigeration unit

[0048] 3. First temperature sensor

[0049] 4 Second temperature sensor

[0050] 5 Controller DETAILED DESCRIPTION

[0051] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0052] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0053] In the present invention, unless otherwise specified, the directions or positional relationships indicated by directional words such as "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0054] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0055] The present invention first provides a lithium battery temperature control system.

[0056] In one embodiment, referring to the attached Figure 1 and attached Figure 3 As shown, the lithium battery temperature control system includes:

[0057] The temperature control box 1 is provided with an air inlet 11 and an air outlet 12 respectively connected to the interior;

[0058] The refrigeration device 2 is connected to the air inlet 11 and is used to supply cold air into the temperature control box 1 through the air inlet 11;

[0059] A temperature measuring device, used to detect the internal temperature of the temperature control box 1;

[0060] The controller 5 is respectively connected to the temperature measuring device and the refrigeration device 2 for communication, and is used to control the refrigeration device 2 according to the detection result of the temperature measuring device.

[0061] In the lithium battery temperature control system of the present embodiment, the temperature control box 1 can be covered on the outside of the lithium battery, and the refrigeration device 2 can send cold air into the interior of the temperature control box 1. The cold air absorbs the heat of the lithium battery and is discharged from the air outlet. In this way, the purpose of cooling the lithium battery can be achieved. In addition, the refrigeration device 2 is controlled according to the internal temperature of the temperature control box 1. In this way, the internal temperature of the temperature control box 1 can be maintained within a suitable temperature range, that is, the temperature of the lithium battery is maintained within a suitable temperature range, which can effectively improve the reliability of the normal operation of the lithium battery in a high temperature environment.

[0062] Specifically, the refrigeration device 2 may be an air conditioning device provided with the operating machine, or may be a specially provided air conditioning device. The air inlet 11 may be provided with a pipe joint to be connected to the refrigeration device 2 through a ventilation pipe through the pipe joint.

[0063] In actual application, the internal space of the temperature control box 1 can be set larger, so that after the temperature control box 1 is placed on the outside of the lithium battery, there is a ventilation gap between the inner wall of the temperature control box 1 and the outer wall of the lithium battery, thereby ensuring the heat exchange effect between the cold air and the lithium battery. A support member can be provided on the bottom wall of the temperature control box 1 to support and fix the lithium battery through the support member. The temperature control box 1 can also include a box body and a cover body. The top of the box body is provided with an opening, and the cover body can be opened and closed to cover the opening. Such a configuration facilitates the disassembly and assembly of the lithium battery.

[0064] In one embodiment, the air outlet 12 is a grid-type air outlet. Such a configuration can ensure a large air volume while preventing foreign objects from entering the temperature control box 1 through the air outlet 12.

[0065] In one embodiment, referring to the attached Figure 1 As shown, the temperature measuring device includes:

[0066] The first temperature sensor 3 is arranged on the temperature control box 1 and is used to detect the air inlet temperature of the temperature control box 1;

[0067] The second temperature sensor 4 is disposed on the temperature control box 1 and is used to detect the air outlet temperature of the temperature control box 1 .

[0068] It can be understood that the controller 5 can determine the internal temperature of the temperature control box 1 according to the average value of the air inlet temperature detected by the first temperature sensor 3 and the air outlet temperature detected by the second temperature sensor 4 .

[0069] In actual application, temperature sensor mounting holes are respectively provided at positions near the air outlet and the air inlet of the temperature control box 1 for installing the first temperature sensor 3 and the second temperature sensor 4 respectively. The sensing end of the first temperature sensor 3 extends to the air inlet of the temperature control box 1, and the sensing end of the second temperature sensor 4 extends to the air outlet of the temperature control box 1.

[0070] Of course, in other embodiments, the temperature measuring device may also be in other forms. For example, the temperature measuring device may include a temperature sensor disposed inside the temperature control box 1 , and the temperature detected by the temperature sensor is the internal temperature of the temperature control box 1 .

[0071] The invention also provides a battery temperature control method.

[0072] In one embodiment, referring to the attached Figure 2 As shown, the battery temperature control method is applied to a lithium battery temperature control system, which includes a temperature control box and a refrigeration device. The temperature control box cover is arranged on the outside of the lithium battery, and the air inlet of the temperature control box is connected to the refrigeration device.

[0073] The battery temperature control method includes the following steps:

[0074] Step S100. Detecting the internal temperature of the temperature control box;

[0075] Step S200. When it is determined that the internal temperature of the temperature control box is higher than the preset temperature, the air volume level of the refrigeration device is adjusted until it is determined that the internal temperature of the temperature control box is lower than or equal to the preset temperature, and the refrigeration device is controlled to maintain operation at the current air volume level.

[0076] Specifically, the lithium battery temperature control system may include a temperature sensor and a controller. The temperature sensor detects the internal temperature of the temperature control box. The controller stores a preset temperature. The controller obtains the internal temperature of the temperature control box through the temperature sensor and compares it with the pre-stored preset temperature. According to the comparison result, a control signal is sent to the refrigeration device so that the refrigeration device adjusts the air volume level according to the control signal.

[0077] In this embodiment, the air volume level of the refrigeration device is adjusted according to the internal temperature of the temperature control box, so that the cold air intake volume of the temperature control box can be automatically adjusted according to the internal temperature, to ensure that the internal temperature of the temperature control box can be stably maintained below or equal to the preset temperature, so that the lithium battery in the temperature control box can be maintained at a suitable operating temperature and maintain good charging and discharging performance.

[0078] In one embodiment, adjusting the air volume level of the refrigeration device until it is determined that the internal temperature of the temperature control box is lower than or equal to a preset temperature, and controlling the refrigeration device to maintain operation at the current air volume level includes the following steps:

[0079] Step S210: Control the refrigeration device to increase the air volume by one level and operate for a first preset time;

[0080] Step S220. When the refrigeration device is controlled to increase the air volume by one level and run for a first preset time, the internal temperature of the temperature control box is detected;

[0081] Step S230. If the internal temperature of the temperature control box is higher than the preset temperature, return to step: control the refrigeration device to increase the air volume by one level and operate for the first preset time;

[0082] Step S240: until the internal temperature of the temperature control box is lower than or equal to the preset temperature.

[0083] In this embodiment, based on the comparison between the internal temperature of the temperature control box and the preset temperature, the refrigeration device increases the air volume level step by step at a first preset time interval. With this setting, the air volume level of the refrigeration device can be accurately matched with the operating conditions of the lithium battery in the temperature control box, thereby avoiding the situation where the air volume level of the refrigeration device is too high and causes waste of resources.

[0084] In another embodiment, adjusting the air volume level of the refrigeration device until it is determined that the internal temperature of the temperature control box is lower than or equal to a preset temperature, and controlling the refrigeration device to maintain operation at the current air volume level includes the following steps:

[0085] Step S210. Control the refrigeration device to run for a first preset time;

[0086] Step S220. When the refrigeration device is controlled to run for a first preset time, the refrigeration device is controlled to increase the air volume by one level;

[0087] Step S220. Detecting the internal temperature of the temperature control box;

[0088] Step S240. If the internal temperature of the temperature control box is higher than the preset temperature, return to step: control the refrigeration device to operate for a first preset time;

[0089] Step S250: until the internal temperature of the temperature control box is lower than or equal to the preset temperature.

[0090] In this embodiment, based on the comparison between the internal temperature of the temperature control box and the preset temperature, the refrigeration device increases the air volume level step by step at a first preset time interval. With this setting, the air volume level of the refrigeration device can be accurately matched with the operating conditions of the lithium battery in the temperature control box, thereby avoiding the situation where the air volume level of the refrigeration device is too high and causes waste of resources.

[0091] In one embodiment, referring to the attached Figure 2 As shown, after adjusting the air volume level of the refrigeration device, the battery temperature control method further includes the following steps:

[0092] Step S300: When the refrigeration device is at the highest air volume level, control the refrigeration device to maintain operation at the highest air volume level.

[0093] In one embodiment, referring to the attached Figure 2 As shown, the battery temperature control method also includes the following steps:

[0094] Step S400: When the refrigeration device is operating at the highest air volume for a second preset time, if the internal temperature of the temperature control box is higher than the preset temperature, an alarm signal is issued.

[0095] In this way, the staff can promptly learn through the alarm signal that the internal temperature of the temperature control box is too high and there is a problem with the temperature control, so as to carry out timely inspection and response.

[0096] Specifically, the lithium battery temperature control system may include an alarm device, which sends out an alarm signal. For example, the alarm device may be an audible and visual alarm, which serves as a reminder through audible and visual broadcasting, or a display device, which serves as a reminder through screen display.

[0097] In one embodiment, detecting the internal temperature of the temperature control box includes:

[0098] Detect the air inlet temperature and air outlet temperature of the temperature control box;

[0099] The average value of the air inlet temperature and the air outlet temperature is determined as the internal temperature of the temperature control box.

[0100] Specifically, temperature sensors may be provided at the air inlet and the air outlet of the temperature control box, respectively, to detect the air inlet temperature and the air outlet temperature of the temperature control box, respectively.

[0101] Of course, in some other embodiments, a temperature sensor may be directly disposed in the temperature control box to directly detect and determine the internal temperature of the temperature control box.

[0102] For ease of understanding, please refer to the attached Figure 4 , a specific application of the battery temperature control method is described in detail:

[0103] Step S1. The operating machine is powered on and the engine is started, and the refrigeration device is controlled to operate according to a preset initial air volume gear;

[0104] Step S2. Obtain the air inlet temperature and the air outlet temperature of the temperature control box, and determine the internal temperature of the temperature control box according to the air inlet temperature and the air outlet temperature;

[0105] Step S3. Determine whether the internal temperature of the temperature control box is lower than or equal to 55°C. If so, control the refrigeration device to operate according to the current air volume level. If not, proceed to step S4.

[0106] Step S4. Control the refrigeration device to increase the air volume by one level, and start calculating the operating time of the refrigeration device from zero;

[0107] Step S5. Determine whether the internal temperature of the temperature control box drops to less than or equal to 55°C. If so, control the refrigeration device to operate according to the current air volume level. If not, proceed to step S6.

[0108] Step S6. Determine whether the operating time of the refrigeration device is greater than or equal to 5 minutes. If so, proceed to step S7. If not, return to step S5.

[0109] Step S7. Determine whether the refrigeration device is at the highest air volume. If not, return to step S4. If yes, proceed to step S8.

[0110] Step S8, determining whether the operating time of the refrigeration device is greater than or equal to 10 minutes, if so, issuing an alarm signal, if not, returning to step S5.

[0111] The present invention also provides a machine-readable storage medium, on which instructions are stored, and the instructions are used to enable a machine to execute the above-mentioned battery temperature control method.

[0112] The present invention also proposes an operating machine, comprising the above lithium battery temperature control system, or implementing the above battery temperature control method.

[0113] Obviously, the operating machine also has the beneficial effects of the above-mentioned lithium battery temperature control system or battery temperature control method.

[0114] Specifically, the working machine includes but is not limited to a loader, a bulldozer, and an excavator.

[0115] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0116] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0117] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0118] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A lithium battery temperature control system, characterized in that: The lithium battery temperature control system comprises: The temperature control box (1) is provided with an air inlet (11) and an air outlet (12) respectively connected to the interior; A refrigeration device (2), connected to the air inlet (11) and used to supply cold air into the interior of the temperature control box (1) through the air inlet (11); A temperature measuring device, used to detect the internal temperature of the temperature control box (1); The controller (5) is respectively connected to the temperature measuring device and the refrigeration device (2) for communication, and is used to control the refrigeration device (2) according to the detection result of the temperature measuring device.

2. The lithium battery temperature control system according to claim 1, characterized in that: The temperature measuring device comprises: A first temperature sensor (3), arranged on the temperature control box (1) and used to detect the air inlet temperature of the temperature control box (1); The second temperature sensor (4) is arranged on the temperature control box (1) and is used to detect the air outlet temperature of the temperature control box (1).

3. A battery temperature control method, characterized in that: The battery temperature control method is applied to a lithium battery temperature control system, which includes a temperature control box and a refrigeration device. The temperature control box cover is arranged on the outside of the lithium battery, and the air inlet of the temperature control box is connected to the refrigeration device. The battery temperature control method comprises: Detecting the internal temperature of the temperature control box; When it is determined that the internal temperature of the temperature control box is higher than the preset temperature, the air volume level of the refrigeration device is adjusted until it is determined that the internal temperature of the temperature control box is lower than or equal to the preset temperature, and the refrigeration device is controlled to maintain operation at the current air volume level.

4. The battery temperature control method according to claim 3, characterized in that: The step of adjusting the air volume level of the refrigeration device until it is determined that the internal temperature of the temperature control box is lower than or equal to the preset temperature, and controlling the refrigeration device to maintain operation at the current air volume level, comprises: Controlling the refrigeration device to increase the air volume by one level and operate for a first preset time period; Under the condition that the refrigeration device is controlled to increase the air volume by one level and operate for the first preset time period, detecting the internal temperature of the temperature control box; If the internal temperature of the temperature control box is higher than the preset temperature, return to the step of: controlling the refrigeration device to increase the air volume by one level and operate for a first preset time; Until the internal temperature of the temperature control box is lower than or equal to the preset temperature.

5. The battery temperature control method according to claim 3, characterized in that: The step of adjusting the air volume level of the refrigeration device until it is determined that the internal temperature of the temperature control box is lower than or equal to the preset temperature, and controlling the refrigeration device to maintain operation at the current air volume level, comprises: Controlling the refrigeration device to operate for a first preset time period; When the refrigeration device is controlled to operate for the first preset time, the refrigeration device is controlled to increase the air volume by one level; Detecting the internal temperature of the temperature control box; If the internal temperature of the temperature control box is higher than the preset temperature, return to step: controlling the refrigeration device to operate for a first preset time period; Until the internal temperature of the temperature control box is lower than or equal to the preset temperature.

6. The battery temperature control method according to claim 3, characterized in that: After adjusting the air volume level of the refrigeration device, the battery temperature control method further includes: When the refrigeration device is at a highest air volume level, the refrigeration device is controlled to keep operating at the highest air volume level.

7. The battery temperature control method according to claim 6, characterized in that: The battery temperature control method further includes: When the refrigeration device is in operation at the highest air volume for a second preset time, if the internal temperature of the temperature control box is higher than a preset temperature, an alarm signal is issued.

8. The battery temperature control method according to claim 3, characterized in that: The detecting the internal temperature of the temperature control box comprises: Detecting the air inlet temperature and the air outlet temperature of the temperature control box; The average value of the air inlet temperature and the air outlet temperature is determined as the internal temperature of the temperature control box.

9. A machine-readable storage medium, characterized in that: The machine-readable storage medium stores instructions, and the instructions are used to enable a machine to execute the battery temperature control method according to any one of claims 3 to 8.

10. A working machine, characterized in that: The operating machine includes a lithium battery temperature control system according to any one of claims 1 or 2, or implements a battery temperature control method according to any one of claims 3-8.

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