A thermal management system for a power domain stacked battery

Abstract

The application discloses a thermal management system of a power domain laminated battery and belongs to the technical field of thermal management of electromechanical devices.The thermal management system comprises an air conditioner module, a power domain module, a refrigeration module and a laminated battery box module, the air conditioner module is used for refrigerating a cab, the power domain module is used for refrigerating a power domain, the laminated battery box module is used for refrigerating a laminated battery box, and the refrigeration module is used for controlling the air conditioner module, the power domain module and the laminated battery box module to refrigerate and providing a cold source.The thermal management system can supply the cold source to the air conditioner module, the power domain module and the laminated battery box module through the refrigeration module, a separate cooling system does not need to be arranged, the cost is reduced, and the demand of refrigerating capacity of each region is guaranteed by controlling heat exchange and flow distribution.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric machinery heat management, and particularly relates to a heat management system of a power domain laminated battery. BACKGROUND

[0002] With the continuous development of electric engineering machinery, technological innovation is an inevitable trend. The multiple systems of the whole vehicle are integrated, which can effectively reduce the cost, improve the performance, and reduce the resource waste of the independent control of the single system in the early stage. For example, the current engineering machinery mostly uses different heat management systems for the laminated battery pack (BMS), the power domain (DCU), and the air conditioning system (AC). Therefore, a heat management system capable of simultaneously controlling the laminated battery pack (BMS), the power domain (DCU), and the air conditioning system (AC) is needed. SUMMARY

[0003] 1. Technical problem to be solved by the application

[0004] The application aims to solve the problems of complex structure and energy waste caused by the use of different heat management systems for the laminated battery pack (BMS), the power domain (DCU), and the air conditioning system (AC) of the existing electric machinery.

[0005] 2. Technical scheme

[0006] To achieve the above-mentioned purpose, the technical scheme provided by the application is as follows:

[0007] The heat management system of the power domain laminated battery provided by the application comprises an air conditioning module, a power domain module, a refrigeration module, and a laminated battery box module. The air conditioning module is used for refrigeration of the cab. The power domain module is used for refrigeration of the power domain. The laminated battery box module is used for refrigeration of the laminated battery box. The refrigeration module is used for controlling the refrigeration of the air conditioning module, the power domain module, and the laminated battery box module and providing a cold source.

[0008] Preferably, the refrigeration module comprises a condenser and a water tank. The water tank is connected with two pipelines and is respectively provided with a water pump one and a water pump two. The condenser is connected with the air conditioning module. The water pump one is connected with the power domain module. The water pump two is connected with the laminated battery box module.

[0009] Preferably, the air conditioning module comprises a cab temperature detection device and a condenser fan. The cab temperature detection device detects the temperature in the vehicle and compares it with the set temperature to determine whether refrigeration is needed. When refrigeration is needed, the condenser fan is controlled to work, and the refrigeration demand is calculated in real time and the power of the condenser fan is controlled. The condenser fan is connected with the condenser. The condenser delivers refrigerant to the condenser fan.

[0010] Preferably, the power domain module is provided with a power domain temperature detection device and a liquid cooling pipeline, the liquid cooling pipeline is connected with a water pump I, the power domain temperature detection device detects the temperature of the power domain module and compares it with the set temperature to determine whether cooling is needed, and sends an instruction to the water pump I to cool when cooling is needed.

[0011] Preferably, the laminated battery box module comprises a battery pack temperature detection device and a battery box liquid cooling pipeline, the battery box liquid cooling pipeline is connected with a water pump II, the battery pack temperature detection device detects the temperature of the battery box and compares it with the set temperature to determine whether cooling is needed, and sends an instruction to the water pump II to cool when cooling is needed.

[0012] Preferably, the battery pack temperature detection device detects the temperature of the battery pack during the driving of the vehicle,

[0013] When the battery pack temperature Tmax is greater than or equal to 35℃ or Tmean is greater than or equal to 30℃, and the inlet water temperature is greater than or equal to 15℃, an instruction is sent to the cooling module to enter the cooling mode;

[0014] When the battery pack temperature Tmax is less than or equal to 30℃ or Tmean is less than or equal to 28℃, and the inlet water temperature is greater than 12℃ and less than 15℃, if the previous mode is the shutdown mode or the heating mode or the self-circulation mode, an instruction is sent to the cooling module to enter the self-circulation mode; if the previous mode is the cooling mode, an instruction is sent to the cooling module to enter the cooling mode;

[0015] When the battery pack temperature Tmax is less than or equal to 30℃ or Tmean is less than or equal to 28℃, and the inlet water temperature is less than or equal to 12℃, an instruction is sent to the cooling module to enter the self-circulation mode;

[0016] Preferably, the battery pack temperature detection device detects the temperature of the battery pack during the charging of the vehicle,

[0017] When the battery pack temperature Tmax is greater than 30℃ and Tmean is greater than or equal to 26℃ or Tmax-Tmin is greater than 3℃, the self-circulation mode is started, and when the inlet water temperature is greater than 10℃, an instruction is sent to the cooling module to enter the cooling mode;

[0018] When the battery pack temperature Tmax is less than or equal to 26℃ or Tmean is less than or equal to 24℃, and the inlet water temperature is greater than 7℃ and less than 10℃, if the previous mode is the shutdown mode or the heating mode or the self-circulation mode, an instruction is sent to the cooling module to enter the self-circulation mode; if the previous mode is the cooling mode, an instruction is sent to the cooling module to enter the cooling mode;

[0019] When the battery pack temperature Tmax is less than or equal to 26℃ or Tmean is less than or equal to 24℃, and the inlet water temperature is less than or equal to 7℃, an instruction is sent to the cooling module to enter the self-circulation mode.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the technical scheme provided by the application has the following beneficial effects:

[0022] The heat management system of the power domain laminated battery provided by the application comprises an air conditioner module, a power domain module, a refrigeration module and a laminated battery box module, the air conditioner module is used for refrigerating a cab, the power domain module is used for refrigerating a power domain, the laminated battery box module is used for refrigerating a laminated battery box, and the refrigeration module is used for controlling the air conditioner module, the power domain module and the laminated battery box module to refrigerate and provide a cold source. The heat management system can supply the air conditioner module, the power domain module and the laminated battery box module with a cold source through the refrigeration module, and does not need to be provided with a separate cooling system, thereby reducing the cost and ensuring the refrigeration capacity of each region through control of heat exchange and flow distribution. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic diagram of the heat management system of the power domain laminated battery.

[0024] Explanation of the reference numerals in the schematic diagram:

[0025] 100, air conditioner module; 200, power domain module; 300, refrigeration module; 310, condenser; 320, water tank; 330, water pump one; 340, water pump two; 400, laminated battery box module. DETAILED DESCRIPTION

[0026] In order to enable personnel in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product or device.

[0028] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0029] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] Example 1

[0033] See attached document Figure 1 This embodiment of a thermal management system for a power domain stacked battery includes an air conditioning module 100, a power domain module 200, a cooling module 300, and a stacked battery box module 400. The air conditioning module 100 is used for cooling the driver's cab, the power domain module 200 is used for cooling the power domain, the stacked battery box module 400 is used for cooling the stacked battery box, and the cooling module 300 is used to control the cooling of the air conditioning module 100, the power domain module 200, and the stacked battery box module 400 and provide a cold source. This thermal management system, through the cooling module 300, can supply a cold source to the air conditioning module 100, the power domain module 200, and the stacked battery box module 400, eliminating the need for a separate cooling system, reducing costs, and ensuring the cooling capacity needs of each area by controlling heat exchange and flow distribution.

[0034] The refrigeration module 300 includes a condenser 310 and a water tank 320. The water tank 320 is connected to two pipes and is equipped with a first water pump 330 and a second water pump 340, respectively. The condenser 310 is connected to the air conditioning module 100, the first water pump 330 is connected to the power domain module 200, and the second water pump 340 is connected to the stacked battery box module 400. The condenser 310 can effectively cool the water in the water tank 320, ensuring that the first water pump 330 and the second water pump 340 can effectively absorb heat during the cooling water circulation process, thus ensuring the cooling effect.

[0035] The air conditioning module 100 includes a cab temperature detection device and a condenser. The cab temperature detection device detects the interior temperature and compares it with a set temperature to determine if cooling is needed. When cooling is required, it controls the condenser to operate, calculates the cooling demand in real time, and controls the condenser power. The condenser is connected to the condenser 310, and the condenser 310 supplies refrigerant to the condenser. This effectively lowers the cab temperature and automatically adjusts the condenser speed according to the cab temperature.

[0036] The power domain module 200 is equipped with a power domain temperature detection device and a liquid cooling pipeline. The liquid cooling pipeline is connected to a water pump 330. The power domain temperature detection device detects the temperature of the power domain module 200 and compares it with a set temperature to determine whether cooling is required. When cooling is required, a command is sent to the water pump 330 to perform cooling. The condenser 310 can effectively cool the water in the water tank 320. The water pump 330 delivers the cooled water to the liquid cooling pipeline of the power domain module 200 to cool the power domain module 200. The cooling efficiency can be adjusted by regulating the power of the water pump 330.

[0037] The stacked battery box module 400 includes a battery pack temperature detection device and a battery box liquid cooling pipeline. The battery box liquid cooling pipeline is connected to a second water pump 340. The battery pack temperature detection device detects the battery box temperature and compares it with a set temperature to determine whether cooling is needed. When cooling is needed, it sends a command to the second water pump 340 to perform cooling. The condenser 310 can effectively cool the water in the water tank 320. The second water pump 340 delivers the cooled water to the liquid cooling pipeline of the stacked battery box module 400 to cool the stacked battery box module 400. The cooling efficiency can be adjusted by adjusting the power of the second water pump 340.

[0038] During vehicle operation, the battery pack temperature detection equipment monitors the battery pack temperature.

[0039] When the battery pack temperature Tmax≥35℃ or Tmean≥30℃ and the inlet water temperature≥15℃, a command is sent to the cooling module 300 to enter the cooling mode.

[0040] When the battery pack temperature Tmax≤30℃ or Tmean≤28℃, and 12℃<inlet temperature<15℃, if the previous mode is shutdown mode, heating mode or self-circulation mode, then a command is sent to the cooling module 300 to enter self-circulation mode; if the previous mode is cooling mode, then a command is sent to the cooling module 300 to enter cooling mode.

[0041] When the battery pack temperature Tmax≤30℃ or Tmean≤28℃ and the inlet water temperature≤12℃, a command is sent to the cooling module 300 to enter self-circulation mode.

[0042] This also includes the use of battery pack temperature detection equipment to monitor the battery pack temperature during vehicle charging.

[0043] When the battery pack temperature Tmax>30℃ and Tmean≥26℃ or Tmax-Tmin>3℃, the self-circulation mode is activated. When the inlet water temperature>10℃, a command is sent to the cooling module 300 to enter the cooling mode.

[0044] When the battery pack temperature Tmax≤26℃ or Tmean≤24℃, and 7℃<inlet temperature<10℃, if the previous mode is shutdown mode, heating mode or self-circulation mode, a command is sent to the cooling module 300 to enter self-circulation mode; if the previous mode is cooling mode, a command is sent to the cooling module 300 to enter cooling mode.

[0045] When the battery pack temperature Tmax≤26℃ or Tmean≤24℃ and the inlet water temperature≤7℃, a command is sent to the cooling module 300 to enter the self-circulation mode.

[0046] Using refrigerant to cool the water circulation system allows the battery pack to cool down quickly. Due to the special nature of the battery pack, such as the dual-gun DC charging currently used in our loaders, the battery will generate a lot of heat under the impact of high current. Simply relying on natural water circulation for cooling is not effective. Therefore, we use refrigerant to force cooling the water circulation system to ensure rapid cooling. At this time, the battery pack can effectively maintain a healthy temperature.

[0047] The above-described embodiments are merely illustrative of certain implementations of the present invention, and are described in a relatively specific and detailed manner. However, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A thermal management system for a power domain tandem battery, characterized in that: It includes an air conditioning module (100), a power domain module (200), a refrigeration module (300), and a stacked battery box module (400). The air conditioning module (100) is used for cooling the cab, the power domain module (200) is used for cooling the power domain, the stacked battery box module (400) is used for cooling the stacked battery box, and the refrigeration module (300) is used to control the air conditioning module (100), the power domain module (200), and the stacked battery box module (400) to cool and provide a cold source. The refrigeration module (300) includes a condenser (310) and a water tank (320). The water tank (320) is connected to two pipes and is equipped with a water pump one (330) and a water pump two (340) respectively. The condenser (310) is connected to the air conditioning module (100). The water pump one (330) is connected to the power domain module (200). The water pump two (340) is connected to the stacked battery box module (400). The stacked battery box module (400) includes a battery pack temperature detection device and a battery box liquid cooling pipeline. The battery box liquid cooling pipeline is connected to water pump two (340). The battery pack temperature detection device detects the battery box temperature and compares it with the set temperature to determine whether cooling is required. When cooling is required, it sends a command to water pump two (340) to perform cooling. This also includes the use of battery pack temperature detection equipment to monitor the battery pack temperature while the vehicle is in motion. When the battery pack temperature Tmax≥35℃ or Tmean≥30℃ and the inlet water temperature≥15℃, a command is sent to the cooling module (300) to enter the cooling mode. When the battery pack temperature Tmax≤30℃ or Tmean≤28℃, 12℃<inlet temperature<15℃, if the previous mode is shutdown mode, heating mode or self-circulation mode, then send a command to the cooling module (300) to enter self-circulation mode; if the previous mode is cooling mode, then send a command to the cooling module (300) to enter cooling mode. When the battery pack temperature Tmax≤30℃ or Tmean≤28℃ and the inlet water temperature≤12℃, a command is sent to the cooling module (300) to enter self-circulation mode; This also includes the use of battery pack temperature detection equipment to monitor the battery pack temperature during vehicle charging. When the battery pack temperature Tmax>30℃ and Tmean≥26℃ or Tmax-Tmin>3℃, the self-circulation mode is activated. When the inlet temperature>10℃, a command is sent to the cooling module (300) to enter the cooling mode. When the battery pack temperature Tmax≤26℃ or Tmean≤24℃, and 7℃<inlet temperature<10℃, if the previous mode is the shutdown mode, heating mode or self-circulation mode, then a command is sent to the cooling module (300) to enter the self-circulation mode; if the previous mode is the cooling mode, then a command is sent to the cooling module (300) to enter the cooling mode. When the battery pack temperature Tmax≤26℃ or Tmean≤24℃ and the inlet water temperature≤7℃, a command is sent to the cooling module (300) to enter the self-circulation mode.

2. The thermal management system for a power domain tandem battery according to claim 1, characterized in that: The air conditioning module (100) includes a cab temperature detection device and a condenser. The cab temperature detection device detects the temperature inside the vehicle and compares it with the set temperature to determine whether cooling is required. When cooling is required, it controls the condenser to work and calculates the cooling demand in real time and controls the power of the condenser. The condenser is connected to the condenser (310), and the condenser (310) delivers refrigerant to the condenser.

3. The thermal management system for a power domain tandem battery according to claim 1, characterized in that: The power domain module (200) is equipped with a power domain temperature detection device and a liquid cooling pipeline. The liquid cooling pipeline is connected to a water pump (330). The power domain temperature detection device detects the temperature of the power domain module (200) and compares it with the set temperature to determine whether cooling is required. When cooling is required, it sends a command to the water pump (330) to perform cooling.

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